US20030206837A1 - Electro-kinetic air transporter and conditioner device with enhanced maintenance features and enhanced anti-microorganism capability - Google Patents

Abstract

An electro-kinetic air conditioner for removing particulates from the air creates an airflow using no moving parts. The airflow is subjected to UV radiation from a germicidal lamp within the device. The conditioner includes an ion generator that has an electrode assembly including a first array of emitter electrodes, a second array of collector electrodes, and a high voltage generator. The device can also include a third or leading or focus electrode located upstream of the first array of emitter electrodes, and/or a trailing electrode located downstream of the second array of collector electrodes, and/or an interstitial electrode located between collector electrodes, and/or an enhanced emitter electrode with an enhanced length in order to increase emissivity.

Description

CLAIM OF PRIORITY
• This application claims priority from provisional application entitled “ELECTRO-KINETIC AIR TRANSPORTER AND CONDITIONER DEVICE WITH ENHANCED MAINTENANCE FEATURES AND ENHANCED ANTI-MICROORGANISM CAPABILITY,” Application No. 60/341,377, filed Dec. 13, 2001 under 35 U.S.C. 119(e),which application is incorporated herein by reference. This application claims priority from provisional application entitled “FOCUS ELECTRODE, ELECTRO-KINETIC AIR TRANSPORTER-CONDITIONER DEVICES,” Application No. 60/306,479, filed Jul. 18, 2001 under 35 U.S.C. 119(e),which application is incorporated herein by reference. This application claims priority from and is a continuation-in-part of patent application “ELECTRO-KINETIC DEVICE WITH ENHANCED ANTI-MICROORGANISM CAPABILITY”, application Ser. No. 09/774,198, filed Jan. 29, 2001, and incorporated herein by reference. This application claims priority from and is a continuation-in-part of U.S. patent application Ser. No. 09/924,624 filed Aug. 8, 2001 which is a continuation of U.S. Pat. Ser. No. 09/564,960 filed May 4, 2000, which is a continuation-in-part of U.S. patent application Ser. No. 09/186,471 filed Nov. 5, 1998, now U.S. Pat. No. 6,176,977. All of the above are incorporated herein by reference.[0001]
CROSS-REFERENCE TO RELATED APPLICATIONS
• 1. U.S. patent application Ser. No. 60/341,518, filed Dec. 13, 2001, entitled “ELECTRO-KINETIC AIR TRANSPORTER-CONDITIONER DEVICES WITH AN UPSTREAM FOCUS ELECTRODE”; SHPR-01041US6[0002]
• 2. U.S. Patent Application No. 60/341,090, filed Dec. 13, 2001, entitled “ELECTRO-KINETIC AIR TRANSPORTER-CONDITIONER DEVICES WITH TRAILING ELECTRODE”; SHPR-01041USE[0003]
• 3. U.S. Patent Application No. 60/341,433, filed Dec. 13, 2001, entitled “ELECTRO-KINETIC AIR TRANSPORTER-CONDITIONER DEVICES WITH INTERSTITIAL ELECTRODE”; SHPR-01041USF[0004]
• 4. U.S. Patent Application No. 60/341,592, filed Dec. 13, 2001, entitled “ELECTRO-KINETIC AIR TRANSPORTER-CONDITIONER DEVICES WITH ENHANCED COLLECTOR ELECTRODE”; SHPR-01041USG[0005]
• 5. U.S. Patent Application No. 60/341,320, filed Dec. 13, 2001, entitled “ELECTRO-KINETIC AIR TRANSPORTER-CONDITIONER DEVICES WITH ENHANCED EMITTER ELECTRODE”; SHPR-01041USH[0006]
• 6. U.S. Patent Application No. 60/341,179, filed Dec. 13, 2001, entitled “ELECTRO-KINETIC AIR TRANSPORTER AND CONDITIONER DEVICE WITH ENHANCED ANTI-MICROORGANISM CAPABILITY”; SHPR-01028US1[0007]
• 7. U.S. Patent Application No. 60/340,702, filed Dec. 13, 2001, entitled “ELECTRO-KINETIC AIR TRANSPORTER AND CONDITIONER DEVICE WITH ENHANCED HOUSING CONFIGURATION AND ENHANCED ANTI-MICROORGANISM CAPABILITY”; SHPR-01028US2[0008]
• 8. U.S. patent application Ser. No. 10/023,197, filed Dec. 13, 2001, entitled “ELECTRO-KINETIC AIR TRANSPORTER-CONDITIONER WITH ENHANCED CLEANING FEATURES”; SHPR-01041US1[0009]
• 9. U.S. patent application Ser. No. 10/023,460, filed Dec. 13, 2001, entitled “ELECTRO-KINETIC AIR TRANSPORTER CONDITIONER WITH PIN-RING CONFIGURATION”; SHPR-01041USJ[0010]
• 10. U.S. Patent Application No. 60/341,176, filed Dec. 13, 2001, entitled “ELECTRO-KINETIC AIR TRANSPORTER-CONDITIONER WITH NON-EQUIDISTANT COLLECTOR ELECTRODES”; SHPR-01041US8[0011]
• 11. U.S. Patent Application No. 60/340,288, filed Dec. 13, 2001, entitled “DUAL INPUT AND OUTLET ELECTROSTATIC AIR TRANSPORTER-CONDMONER”; SHPR-01041US7[0012]
• 12. U.S. Patent Application No. 60/340,462, filed Dec. 13, 2001, entitled “ELECTRO-KINETIC AIR TRANSPORTER-CONDITIONER DEVICES WITH A ENHANCED COLLECTOR ELECTRODE FOR COLLECTION OF MORE PARTICULATE MATTER”; SHPR-01041US9[0013]
• 13. U.S. patent application Ser. No. ______, filed herewith, entitled “ELECTRO-KINETIC AIR TRANSPORTER-CONDITIONER DEVICES WITH AN UPSTREAM FOCUS ELECTRODE”; SHPR-01041USL[0014]
• 14. U.S. patent application Ser. No. ______, filed herewith, entitled “ELECTRO-KINETIC AIR TRANSPORTER-CONDITIONER DEVICES WITH TRAILING ELECTRODE”; SHPR-01041USM[0015]
• 15. U.S. patent application Ser. No. ______, filed herewith, entitled “ELECTRO-KINETIC AIR TRANSPORTER-CONDITIONER DEVICES WITH INTERSTITIAL ELECTRODE”; SHPR-01041USN[0016]
• 16. U.S. patent application Ser. No. ______, filed herewith, entitled “ELECTRO-KINETIC AIR TRANSPORTER-CONDITIONER DEVICES WITH ENHANCED COLLECTOR ELECTRODE”; SHPR-01041 USO[0017]
• 17. U.S. patent application Ser. No. ______, filed herewith, entitled “ELECTRO-KINETIC AIR TRANSPORTER-CONDITIONER DEVICES WITH ENHANCED EMITTER ELECTRODE”; SHPR-01041USP[0018]
• 18. U.S. patent application Ser. No. ______, filed herewith, entitled “ELECTRO-KINETIC AIR TRANSPORTER AND CONDITIONER DEVICE WITH ENHANCED ANTI-MICROORGANISM CAPABILITY”; SHPR-01028US4[0019]
• 19. U.S. patent application Ser. No. ______, filed herewith, entitled “ELECTRO-KINETIC AIR TRANSPORTER AND CONDITIONER DEVICE WITH ENHANCED HOUSING CONFIGURATION AND ENHANCED ANTI-MICROORGANISM CAPABILITY”; SHPR-01028US5[0020]
• 20. U.S. patent application Ser. No. ______, filed herewith, entitled “ELECTRO-KINETIC AIR TRANSPORTER-CONDITIONER WITH NON-EQUIDISTANT COLLECTOR ELECTRODES”; SHPR-01041USQ[0021]
• 21. U.S. patent application Ser. No. ______, filed herewith, entitled “DUAL INPUT AND OUTLET ELECTROSTATIC AIR TRANSPORTER-CONDITIONER”; SHPR01041USR and[0022]
• 22. U.S. patent application Ser. No. ______, filed herewith, entitled “ELECTRO-KINETIC AIR TRANSPORTER-CONDITIONER DEVICES WITH A ENHANCED COLLECTOR ELECTRODE FOR COLLECTION OF MORE PARTICULATE MATTER”. SHPR-01041USS[0023]
• All of the above are incorporated herein by reference.[0024]
FIELD OF THE INVENTION
• The present invention relates generally to a device that transports and conditions air. More specifically, an embodiment of the present invention provides such a device with the enhanced ability to reduce the number of microorganisms within the air, which microorganisms can include germs, bacteria, and viruses.[0025]
BACKGROUND OF THE INVENTION
• U.S. Pat. No. 4,789,801 issued to Lee, and incorporated herein by reference, describes various devices to generate a stream of ionized air using an electro-kinetic technique. In overview, electro-kinetic techniques use high electric fields to ionize air molecules, a process that produces ozone (O[0026]₃) as a byproduct. Ozone is an unstable molecule of oxygen that is commonly produced as a byproduct of high voltage arcing. In appropriate concentrations, ozone can be a desirable and useful substance. But ozone by itself may not be effective to kill microorganisms such as germs, bacteria, and viruses in the environment surrounding the device.
• FIG. 1 depicts a generic electro-[0027]kinetic device10 to condition air.Device10 includes ahousing20 that typically has at least oneair input30 and at least oneair output40. Withinhousing20 there is disposed an electrode assembly orsystem50 comprising afirst electrode array60 having at least oneelectrode70 and comprising asecond electrode array80 having at least oneelectrode90.System10 further includes ahigh voltage generator95 coupled between the first and second electrode arrays. As a result, ozone and ionized particles of air are generated withindevice10, and there is an electro-kinetic flow of air in the direction from thefirst electrode array60 towards thesecond electrode array80. In FIG. 1, the large arrow denoted IN represents ambient air that can enterinput port30. The small “x”'s denote particulate matter that may be present in the incoming ambient air. The air movement is in the direction of the large arrows, and the output airflow, denoted OUT, exitsdevice10 viaoutlet40. An advantage of electro-kinetic devices such asdevice10 is that an airflow is created without using fans or other moving parts. Thus,device10 in FIG. 1 can function somewhat as a fan to create an output airflow, but without requiring moving parts.
• Preferably particulate matter “x” in the ambient air can be electrostatically attracted to the[0028]second electrode array80, with the result that the outflow (OUT) of air fromdevice10 not only contains ozone and ionized air, but can be cleaner than the ambient air. In such devices, it can become necessary to occasionally clean the secondelectrode array electrodes80 to remove particulate matter and other debris from the surface ofelectrodes90. Accordingly, the outflow of air (OUT) is conditioned in that particulate matter is removed and the outflow includes appropriate amounts of ozone, and some ions.
• An outflow of air containing ions and ozone may not, however, destroy or significantly reduce microorganisms such as germs, bacteria, fungi, viruses, and the like, collectively hereinafter “microorganisms.” It is known in the art to destroy such microorganisms with, byway of example only, germicidal lamps. Such lamps can emit ultra-violet radiation having a wavelength of about 254 nm. For example, devices to condition air using mechanical fans, HEPA filters, and germicidal lamps are sold commercially by companies such as Austin Air, C.A.R.E. 2000, Amaircare, and others. Often these devices are somewhat cumbersome, and have the size and bulk of a small filing cabinet. Although such fan-powered devices can reduce or destroy microorganisms, the devices tend to be bulky, and are not necessarily silent in operation.[0029]
• U.S. Pat. Nos. 5,879,435, 6,019,815, and 6,149,717, issued to Satyapal et al., and incorporated herein by reference, discloses an electronic air cleaner that contains an electrostatic precipitator cell and a germicidal lamp for use, among other uses, with a forced air furnace system. The electrostatic precipitator cell includes multiple collector plates for collecting particulate material from the airstream. The germicidal lamp is disposed within the air cleaner to irradiate the collector plates and to destroy microbial growth that might occur on the particulate material deposited on the collector plates. Particles that pass through the air cleaner due to the action of the fan of the forced air furnace, and that are not deposited on the collector plates, generally are not subjected to the germicidal radiation for a period of time long enough for the light to substantially reduce microorganisms within the airflow.[0030]
• What is needed is a device to condition air in a room that can operate relatively silently to remove particulate matter in the air, that can preferably output appropriate amounts of ozone or no ozone, and that can kill or reduce microorganisms such as germs, fungi, bacteria, viruses, and the like contained within the airflow.[0031]
SUMMARY OF THE PRESENT INVENTION
• Embodiments of the present invention provide devices that fulfill the above described needs. It is an aspect of the present invention to reduce the amount of microorganisms within the airflow. An embodiment of the present invention has an ion generator to create an airflow and collect particulates, and a germicidal lamp to kill microorganisms. The housing is shaped to slow the airflow rate as the airflow passes the germicidal lamp, allowing a longer dwell time of the air in front of the germicidal lamp.[0032]
• An aspect of the invention includes the germicidal lamp located upstream of the ion generator. An embodiment of the invention locates the germicidal lamp within the housing to maximize the amount of air irradiated, and to minimize the disturbance the lamp housing will cause to the airflow rate of the device. Another embodiment maximizes the amount of germicidal light that will directly shine on the airflow, without having to be reflected.[0033]
• Another aspect of the present invention ensures that there is no direct line-of-sight through the air inlet or the air outlet of the housing to the germicidal lamp. An embodiment of the present invention has vertical fins covering the air inlet and air outlet to prohibit an individual from directly staring at the germicidal radiation emitted by the lamp. Another embodiment includes a shell or lamp housing that substantially surrounds the germicidal lamp to direct the radiation away from the air inlet, and the air outlet.[0034]
• Another feature of an embodiment of the invention includes the ease of removeability of electrodes from the ion generator and ease of replacement of the germicidal lamp. An embodiment of the invention includes a rear panel that can be removed to expose the germicidal lamp for replacing. Another embodiment of the invention has second electrodes and a germicidal lamp that can be removed through the top of the housing for cleaning and/or replacement.[0035]
• Other features and advantages of the invention will appear from the following description in which the preferred embodiments have been set forth in detail, in conjunction with the accompanying drawings and claims.[0036]
BRIEF DESCRIPTION OF THE FIGURES
• FIG. 1 depicts a generic electro-kinetic conditioner device that outputs ionized air and ozone, according to the prior art;[0037]
• FIGS.[0038]2A-2B; FIG. 2A is a perspective view of an embodiment of the housing for the present invention; FIG. 2B is a perspective view of the embodiment shown in FIG. 2A, illustrating the removable array of second electrodes;
• FIGS.[0039]3A-3E; FIG. 3A is a perspective view of an embodiment of the present invention without a base; FIG. 3B is a top view of the embodiment of the present invention illustrated in FIG. 3A; FIG. 3C is a partial perspective view of the embodiment shown in FIGS.3A-3B, illustrating the removable second array of electrodes; FIG. 3D is a side view of the embodiment of the present invention of FIG. 3A including a base; FIG. 3E is a perspective view of the embodiment in FIG. 3D, illustrating a removable rear panel which exposes a germicidal lamp;
• FIG. 4 is a perspective view of another embodiment of the present invention;[0040]
• FIGS.[0041]5A-5B; FIG. 5A is atop, partial cross-sectioned view of an embodiment of the present invention, illustrating one configuration of the germicidal lamp; FIG. 5B is a top, partial cross-sectioned view of another embodiment of the present invention, illustrating another configuration of the germicidal lamp;
• FIG. 6 is a top, partial cross-sectional view of yet another embodiment of the present invention;[0042]
• FIGS.[0043]7A-7B; FIG. 7A is a partial electrical block diagram of an embodiment of the circuit of the present invention; FIG. 7B is a partial electrical block diagram of the embodiment of the present invention for use with the circuit depicted in FIG. 7A;
• FIGS.[0044]8A-8F; FIG. 8A is a perspective view showing an embodiment of an electrode assembly, according to the present invention; FIG. 8B is a plan view of the embodiment illustrated in FIG. 8A; FIG. 8C is a perspective view showing another embodiment of an electrode assembly, according to the present invention; FIG. 8D is a plan view illustrating a modified version of the embodiment shown in FIG. 8C; FIG. 8E is a perspective view showing yet another embodiment of an electrode assembly according to the present invention; FIG. 8F is a plan view of the embodiment shown in FIG. 8E;
• FIGS.[0045]9A-9B; FIG. 9A is a perspective view of still another embodiment of the present invention; FIG. 9B is a plan view of a modified embodiment of that shown in FIG. 9A;
• FIGS.[0046]10A-10D; FIG. 10A is a perspective view of another embodiment of the present invention; FIG. 10B is a perspective view of a modified embodiment of that shown in FIG. 10A; FIG. 10C is a perspective view of a modified embodiment of that shown in FIG. 10B; FIG. 10D is a modified embodiment of that shown in FIG. 8D;
• FIGS.[0047]11A-11C; FIG. 11A is a perspective view of yet another embodiment of the present invention; FIG. 11B is a perspective view of a modified embodiment of that shown in FIG. 11A; FIG. 11C is a perspective view of a modified embodiment of that shown in FIG. 11B;
• FIGS.[0048]12A-12C; FIG. 12A is a perspective view of still another embodiment of the present invention; FIG. 12B is a perspective view of a modified embodiment of that shown in FIG. 9A; FIG. 12C is a perspective view of a modified embodiment of that shown in FIG. 12A;
• FIGS.[0049]13A-13C; FIG. 13A is a perspective view of another embodiment of the present invention; FIG. 13B is a plan view of the embodiment shown in FIG. 13A; FIG. 13C is a plan view of still another embodiment of the present invention;
• FIGS.[0050]14A-14F; FIG. 14A is a plan view of still another embodiment of the present invention; FIG. 14B is a plan view of a modified embodiment of that shown in FIG. 14A; FIG. 14C is a plan view of yet another embodiment of the present invention; FIG. 14D is a plan view of a modified embodiment of that shown in FIG. 14C; FIG. 14E is a plan view of another embodiment of the present invention; FIG. 14F is a plan view of a modified embodiment of that shown in FIG. 14E; and
• FIGS.[0051]15A-15C; FIG. 15A is perspective view of another embodiment of the present invention; FIG. 15B is a perspective view of still another embodiment of the present invention; FIG. 15C is a perspective view of yet another embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
• Overall Air Transporter-Conditioner System Configuration:[0052]
• FIGS.[0053]2A-2B
• FIGS.[0054]2A-2B depicts a system which does not have incorporated therein a germicidal lamp. However, these embodiments do include other aspects such as the removable second electrodes which can be included in the other described embodiments.
• FIGS. 2A and 2B depict an electro-kinetic air transporter-[0055]conditioner system100 whosehousing102 includes preferably rear-located intake vents orlouvers104 and preferably front located exhaust vents106, and abase pedestal108. Preferably, thehousing102 is free standing and/or upstandingly vertical and/or elongated. Internal to thetransporter housing102 isanion generating unit160, preferably powered by an AC:DC power supply that is energizable or excitable using switch S1. Switch S1, along with the other below described user operated switches, are conveniently located at the top103 of theunit100.Ion generating unit160 is self-contained in that other ambient air, nothing is required from beyond thetransporter housing102, save external operating potential, for operation of the present invention.
• The[0056]upper surface103 of thehousing102 includes a user-liftable handle member112 to which is affixed asecond array240 ofcollector electrodes242. Thehousing102 also encloses a first array ofemitter electrodes230, or a single first emitter electrode shown here as a single wire or wire-shapedelectrode232. (The terms “wire” and “wire-shaped” shall be used interchangeably herein to mean an electrode either made from a wire or, if thicker or stiffer than a wire, having the appearance of a wire.) In the embodiment shown,handle member112 liftssecond array electrodes240 upward causing the second electrode to telescope out of the top of the housing and, if desired, out ofunit100 for cleaning, while thefirst electrode array230 remains withinunit100. As is evident from the figure, the second array ofelectrodes240 can be lifted vertically out from the top103 ofunit100 along the longitudinal axis or direction of theelongated housing102. This arrangement with the second electrodes removable from the top103 of theunit100, makes it easy for the user to pull thesecond electrodes242 out for cleaning. In FIG. 2B, the bottom ends ofsecond electrodes242 are connected to amember113, to which is attached amechanism500, which includes a flexible member and a slot for capturing and cleaning thefirst electrode232, wheneverhandle member112 is moved upward or downward by a user. The first and second arrays of electrodes are coupled to the output terminals ofion generating unit160.
• The general shape of the embodiment of the invention shown in FIGS. 2A and 2B is that of a figure eight in cross-section, although other shapes are within the spirit and scope of the invention. The top-to-bottom height in one preferred embodiment is, 1 m, with a left-to-right width of preferably 15 cm, and a front-to-back depth of perhaps 10 cm, although other dimensions and shapes can of course be used. A louvered construction provides ample inlet and outlet venting in an ergonomical housing configuration. There need be no real distinction between[0057]vents104 and106, except their location relative to the second electrodes. These vents serve to ensure that an adequate flow of ambient air can be drawn into or made available to theunit100, and that an adequate flow of ionized air that includes appropriate amounts of O₃flows out fromunit100.
• As will be described, when[0058]unit100 is energized by depressing switch S1, high voltage or high potential output by anion generator160 produces ions at thefirst electrode232, which ions are attracted to thesecond electrodes242. The movement of the ions in an “IN” to “OUT” direction carries with the ions air molecules, thus electro-kinetically producing an outflow of ionized air. The “IN” rotation in FIGS. 2A and 2B denote the intake of ambient air withparticulate matter60. The “OUT” notation in the figures denotes the outflow of cleaned air substantially devoid of the particulate matter, which particulates matter adheres electrostatically to the surface of the second electrodes. In the process of generating the ionized airflow appropriate amounts of ozone (O₃) are beneficially produced. It maybe desired to provide the inner surface ofhousing102 with an electrostatic shield to reduce detectable electromagnetic radiation. For example, a metal shield could be disposed within the housing, or portions of the interior of the housing can be coated with a metallic paint to reduce such radiation.
• Preferred Embodiments of Air-Transporter-Conditioner System with Germicidal Lamp[0059]
• FIGS.[0060]3A-6 depict various embodiments of thedevice200, with an improved ability to diminish or destroy microorganisms including bacteria, germs, and viruses. Specifically, FIGS.3A-6 illustrate various preferred embodiments of the elongated andupstanding housing210 with the operating controls located on thetop surface217 of thehousing210 for controlling thedevice200.
• FIGS.[0061]3A-3E
• FIG. 3A illustrates a first preferred embodiment of the[0062]housing210 ofdevice200. Thehousing210 is preferably made from a lightweight inexpensive material, ABS plastic for example. As a germicidal lamp (described hereinafter) is located within thehousing210, the material must be able to withstand prolonged exposure to class UV-C light. Non “hardened” material will degenerate over time if exposed to light such as UV-C. Byway of example only, thehousing210 may be manufactured from CYCLOLAC® ABS Resin, (material designation VW300(f2)) which is manufactured by General Electric Plastics Global Products, and is certified by UL Inc. for use with ultraviolet light. It is within the scope of the present invention to manufacture thehousing210 from other UV appropriate materials.
• In a preferred embodiment, the[0063]housing210 is aerodynamically oval, elliptical, teardrop-shaped or egg-shaped. Thehousing210 includes at least oneair intake250, and at least oneair outlet260. As used herein, it will be understood that theintake250 is “upstream” relative to theoutlet260, and that theoutlet260 is “downstream” from theintake250. “Upstream” and “downstream” describe the general flow of air into, through, and out ofdevice200, as indicated by the large hollow arrows.
• Covering the[0064]inlet250 and theoutlet260 are fins, louvers, or baffles212. Thefins212 are preferably elongated and upstanding, and thus in the preferred embodiment, vertically oriented to minimize resistance to the airflow entering and exiting thedevice200. Preferably thefins212 are vertical and parallel to at least the second collector electrode array240 (see FIG. 5A). Thefins212 can also be parallel to the firstemitter electrode array230. This configuration assists in the flow of air through thedevice200 and also assists in preventing UV radiation from the UV or germicidal lamp290 (described hereinafter), or other germicidal source, from exiting thehousing210. By way of example only, if the long width of the body from theinlet250 to theoutlet260 is 8 inches, the collector electrode242 (see FIG. 5A) can be 1¼″ wide in the direction of airflow, and thefins212 can be ¾″ or ½″ wide in the direction airflow. Of course, other proportionate dimensions are within the spirit and scope of the invention. Further, other fin and housing shapes which may not be as aerodynamic are within the spirit and scope of the invention.
• From the above it is evident that preferably the cross-section of the[0065]housing210 is oval, elliptical, teardrop-shaped or egg shaped with theinlet250 andoutlet260 narrower than the middle (see line A-A in FIG. 5A) of thehousing210. Accordingly, the airflow, as it passes across line A-A, is slower due to the increased width and area of thehousing210. Any bacteria, germs, or virus within the airflow will have a greater dwell time and be neutralized by a germicidal device, such as, preferably, an ultraviolet lamp.
• FIG. 3B illustrates the operating controls for the[0066]device200. Located ontop surface217 of thehousing210 is an airflowspeed control dial214, aboost button216, afunction dial218, and an overload/cleaning light219. The airflowspeed control dial214 has three settings from which a user can choose: LOW, MED, and HIGH. The airflow rate is proportional to the voltage differential between the electrodes or electrode arrays coupled to theion generator160. The LOW, MED, and HIGH settings generate a different predetermined voltage difference between the first and second arrays. For example, the LOW setting will create the smallest voltage difference, while the HIGH setting will create the largest voltage difference. Thus, the LOW setting will cause thedevice200 to generate the slowest airflow rate, while the HIGH setting will cause thedevice200 to generate the fastest airflow rate. These airflow rates are created by the electronic circuit disclosed in FIGS.7A-7B, and operate as disclosed below.
• The[0067]function dial218 enables a user to select “ON,” “ON/GP,” or “OFF.” Theunit200 functions as an electrostatic air transporter-conditioner, creating an airflow from theinlet250 to theoutlet260, and removing the particles within the airflow when thefunction dial218 is set to the “ON” setting. Thegermicidal lamp290 does not operate, or emit UV light, when thefunction dial218 is set to “ON.” Thedevice200 also functions as an electrostatic air transporter conditioner, creating an airflow from theinlet250 to theoutlet260, and removing particles within the airflow when thefunction dial218 is set to the “ON/GP” setting. In addition, the “ON/GP” setting activates thegermicidal lamp290 to emit UV light to remove or kill bacteria within the airflow. Thedevice200 will not operate when thefunction dial218 is set to the “OFF” setting.
• As previously mentioned, the[0068]device200 preferably generates small amounts of ozone to reduce odors within the room. If there is an extremely pungent odor within the room, or a user would like to temporarily accelerate the rate of cleaning, thedevice200 has aboost button216. When theboost button216 is depressed, thedevice200 will temporarily increase the airflow rate to a predetermined maximum rate, and generate an increased amount of ozone. The increased amount of ozone will reduce the odor in the room faster than if thedevice200 was set to HIGH. The maximum airflow rate will also increase the particle capture rate of thedevice200. In a preferred embodiment, pressing theboost button216 will increase the airflow rate and ozone production continuously for 5 minutes. This time period maybe longer or shorter. At the end of the preset time period (e.g., 5 minutes), thedevice200 will return to the airflow rate previously selected by thecontrol dial214.
• The overload/[0069]cleaning light219 indicates if thesecond electrodes242 require cleaning, or if arcing occurs between the first and second electrode arrays. The overload/cleaning light219 may illuminate either amber or red in color. The light219 will turn amber if thedevice200 has been operating continuously for more than two weeks and thesecond array240 has not been removed for cleaning within the two week period. The amber light is controlled by the below described 2-week time circuit130 (see FIG. 7B) which is connected to thepower setting circuit122. Thedevice200 will continue to operate after the light219 turns amber. The light219 is only an indicator. There are two ways to reset or turn the light219 off. A user may remove and replace thesecond array240 from theunit200. The user may also turn the control dial218 to the OFF position, and subsequently turn thecontrol dial218 back to the “ON” or “ON/GP” position. Thetimer circuit130 will reset and begin counting a new two week period upon completing either of these two steps.
• The light[0070]219 will turn red to indicate that arcing has occurred between thefirst array230 and thesecond array240, as sensed by asensing circuit132, which is connected between theIGBT switch126 and theconnector oscillator124 of FIG. 7B (as described below). When arcing occurs, thedevice200 will automatically shut itself off. Thedevice200 cannot be restarted until thedevice200 is reset. To reset thedevice200, thesecond array240 should first be removed from thehousing210 after theunit200 is turned off. Thesecond electrode240 can then be cleaned and placed back into thehousing210. Then, thedevice200 is turned on. If no arcing occurs, thedevice200 will operate and generate an airflow. If the arcing between the electrodes continues, thedevice200 will again shut itself off, and need to be reset.
• FIG. 3C illustrates the[0071]second electrodes242 partially removed from thehousing210. In this embodiment, thehandle202 is attached to anelectrode mounting bracket203. Thebracket203 secures thesecond electrodes242 in a fixed, parallel configuration. Anothersimilar bracket203 is attached to thesecond electrodes242 substantially at the bottom (not shown). The twobrackets203 align thesecond electrodes242 parallel to each other, and in-line with the airflow traveling through thehousing210. Preferably, thebrackets203 are non-conductive surfaces.
• One of the various safety features can be seen with the[0072]second electrodes242 partially removed. As shown in FIG. 3C, aninterlock post204 extends from the bottom of thehandle202. When thesecond electrodes242 are placed completely into thehousing210, thehandle202 rests within thetop surface217 of the housing, as shown by FIGS.3A-3B. In this position, theinterlock post204 protrudes into theinterlock recess206 and activates a switch connecting the electrical circuit of theunit200. When thehandle202 is removed from thehousing210, theinterlock post204 is pulled out of theinterlock recess206 and the switch opens the electrical circuit. With the switch in an open position, theunit200 will not operate. Thus, if thesecond electrodes242 are removed from thehousing210 while theunit200 is operating, theunit200 will shut off as soon as theinterlock post204 is removed from theinterlock recess206.
• FIG. 3D depicts the[0073]housing210 mounted on a stand orbase215. Thehousing210 has aninlet250 and anoutlet260. Thebase215 sits on a floor surface. Thebase215 allows thehousing210 to remain in a vertical position. It is within the scope of the present invention for thehousing210 to be pivotally connected to thebase215. As can be seen in FIG. 3D,housing210 includes slopedtop surface217 and slopedbottom surface213. These surfaces slope inwardly frominlet250 tooutlet260 to additionally provide a streamline appearance and effect.
• FIG. 3E illustrates that the[0074]housing210 has a removablerear panel224, allowing a user to easily access and remove thegermicidal lamp290 from thehousing210 when thelamp290 expires. Thisrear panel224 in this embodiment defines the air inlet and comprises the vertical louvers. Therear panel224 has lockingtabs226 located on each side, along the entire length of thepanel224. The lockingtabs226, as shown in FIG. 3E, are “L”-shaped. Eachtab224 extends away from thepanel224, inward towards thehousing210, and then projects downward, parallel with the edge of thepanel224. It is within the spirit and scope of the invention to have differently shapedtabs226. Eachtab224 individually and slidably interlocks withrecesses228 formed within thehousing210. Therear panel224 also has a biased lever (not shown) located at the bottom of thepanel224 that interlocks with therecess230. To remove thepanel224 from thehousing210, the lever is urged away from thehousing210, and thepanel224 is slid vertically upward until thetabs226 disengage therecesses228. Thepanel224 is then pulled away from thehousing210. Removing thepanel224 exposes thelamp290 for replacement.
• The[0075]panel224 also has a safety mechanism to shut thedevice200 off when thepanel224 is removed. Thepanel224 has a rear projecting tab (not shown) that engages thesafety interlock recess227 when thepanel224 is secured to thehousing210. Byway of example only, the rear tab depresses a safety switch located within therecess227 when therear panel224 is secured to thehousing210. Thedevice200 will operate only when the rear tab in thepanel224 is fully inserted into thesafety interlock recess227. When thepanel224 is removed from thehousing210, the rear projecting tab is removed from therecess227 and the power is cut-off to theentire device200. For example if a user removes therear panel224 while thedevice200 is running, and thegermicidal lamp290 is emitting UV radiation, thedevice200 will turn off as soon as the rear projecting tab disengages from therecess227. Preferably, thedevice200 will turn off when therear panel224 is removed only a very short distance (e.g., ¼″) from thehousing210. This safety switch operates very similar to the interlockingpost204, as shown in FIG. 3C.
• FIG. 4[0076]
• FIG. 4 illustrates yet another embodiment of the[0077]housing210. In this embodiment, thegermicidal lamp290 maybe removed from thehousing210 by lifting thegermicidal lamp290 out of thehousing210 through thetop surface217. Thehousing210 does not have a removablerear panel224. Instead, ahandle275 is affixed to thegermicidal lamp290. Thehandle275 is recessed within thetop surface217 of thehousing210 similar to thehandle202, when thelamp290 is within thehousing210. To remove thelamp290, thehandle275 is vertically raised out of thehousing210.
• The[0078]lamp290 is situated within thehousing210 in a similar manner as the second array ofelectrodes240. That is to say, that when thelamp290 is pulled vertically out of the top217 of thehousing210, the electrical circuit that provides power to thelamp290 is disconnected. Thelamp290 is mounted in a lamp fixture that has circuit contacts which engages the circuit in FIG. 7A. As thelamp290 and fixture are pulled out, the circuit contacts are disengaged. Further, as thehandle275 is lifted from thehousing210, a cutoff switch will shut theentire device200 off. This safety mechanism ensures that thedevice200 will not operate without thelamp290 placed securely in thehousing210, preventing an individual from directly viewing the radiation emitted from thelamp290. Reinserting thelamp290 into thehousing210 causes the lamp fixture to reengage the circuit contacts as is known in the art. In similar, but less convenient fashion, thelamp290 may be designed to be removed from the bottom of thehousing210.
• The[0079]germicidal lamp290 is a preferably UV-C lamp that preferably emits viewable light and radiation (in combination referred to as radiation or light280) having wavelength of about 254 nm. This wavelength is effective in diminishing or destroying bacteria, germs, and viruses to which it is exposed.Lamps290 are commercially available. For example, thelamp290 maybe a Phillips model TUV 15W/G15 T8, a 15 W tubular lamp measuring about 25 mm in diameter by about 43 cm in length. Another suitable lamp is the Phillips TUV 8WG8 T6, an 8 W lamp measuring about 15 mm in diameter by about 29 cm in length. Other lamps that emit the desired wavelength can instead be used.
• FIGS.[0080]5A-5B
• As previously mentioned, one role of the[0081]housing210 is to prevent an individual from viewing, by way of example, ultraviolet (UV) radiation generated by agermicidal lamp290 disposed within thehousing210. FIGS.5A-5B illustrate preferred locations of thegermicidal lamp290 within thehousing210. FIGS.5A-5B further show the spacial relationship between thegermicidal lamp290 and theelectrode assembly220, and thegermicidal lamp290 and theinlet250 and theoutlet260 and the inlet and outlet louvers.
• In a preferred embodiment, the[0082]inner surface211 of thehousing210 diffuses or absorbs the UV light emitted from thelamp290. FIGS.5A-5B illustrate that thelamp290 does emit some light280 directly onto theinner surface211 of thehousing210. By way of example only, theinner surface211 of thehousing210 can be formed with anon-smooth finish, or anon-light reflecting finish or color, to also prevent the UV-C radiation from exiting through either theinlet250 or theoutlet260. The UV portion of theradiation280 striking thewall211 will be absorbed and disbursed as indicated above.
• As discussed above, the[0083]fins212 covering theinlet250 and theoutlet260 also limit any line of sight of the user into thehousing210. Thefins212 are vertically oriented within theinlet250 and theoutlet260. The depth D of eachfin212 is preferably deep enough to prevent an individual from directly viewing theinterior wall211. In a preferred embodiment, an individual cannot directly view theinner surface211 by moving from side-to-side, while looking into theoutlet260 or theinlet250. Looking between thefins212 and into thehousing210 allows an individual to “see through” thedevice200. That is, a user can look into theinlet vent250 or theoutlet vent260 and see out of the other vent. It is to be understood that it is acceptable to see light or a glow coming from withinhousing210, if the light has anon-UV wavelength that is acceptable for viewing. In general, an user viewing into theinlet250 or theoutlet260 maybe able to notice a light or glow emitted from within thehousing210. This light is acceptable to view. In general, when theradiation280 strikes theinterior surface211 of thehousing210, theradiation280 is shifted from its U spectrum. The wavelength of the radiation changes from the U spectrum into an appropriate viewable spectrum. Thus, any light emitted from within thehousing210 is appropriate to view.
• As also discussed above, the[0084]housing210 is designed to optimize the reduction of microorganisms within the airflow. The efficacy ofradiation280 upon microorganisms depends upon the length of time such organisms are subjected to theradiation280. Thus, thelamp290 is preferably located within thehousing210 where the airflow is the slowest. In preferred embodiments, thelamp290 is disposed within thehousing210 along line A-A (see FIGS.5A-7). Line A-A designates the largest width and cross-sectional area of thehousing210, perpendicular to the airflow. Thehousing210 creates a fixed volume for the air to pass through. In operation, air enters theinlet250, which has a smaller width, and cross-sectional area, than along line A-A. Since the width and cross-sectional area of thehousing210 along line A-A are larger than the width and cross-sectional area of theinlet250, the airflow will decelerate from theinlet250 to the line A-A. By placing thelamp290 substantially along line A-A, the air will have the longest dwell time as it passes through theradiation280 emitted by thelamp290. In other words, the microorganisms within the air will be subjected to theradiation280 for the longest period possible by placing thelamp290 along line A-A. It is, however, within the scope of the present invention to locate thelamp290 anywhere within thehousing210, preferably upstream of theelectrode assembly220.
• A shell or[0085]housing270 substantially surrounds thelamp290. Theshell270 prevents the light280 from shining directly towards theinlet250 or theoutlet260. In a preferred embodiment, the interior surface of theshell270 that faces thelamp290 is anon-reflective surface. By way of example only, the interior surface of theshell270 maybe a rough surface, or painted a dark, non-gloss color such as black. Thelamp290, as shown in FIGS.5A-5B, is a circular tube parallel to thehousing210. In a preferred embodiment, thelamp290 is substantially the same length as, or shorter than, thefins212 covering theinlet250 andoutlet260. Thelamp290 emits the light280 outward in a3600 pattern. Theshell270 blocks the portion of the light280 emitted directly towards theinlet250 and theoutlet260. As shown in FIGS. 5A and 5B, there is no direct line of sight through theinlet250 or theoutlet260 that would allow a person to view thelamp290. Alternatively, theshell270 can have an internal reflective surface in order to reflect radiation into the air stream.
• In the embodiment shown in FIG. 5A, the[0086]lamp290 is located along the side of thehousing210 and near theinlet250. After the air passes through theinlet250, the air is immediately exposed to the light280 emitted by thelamp290. An elongated “U”-shapedshell270 substantially encloses thelamp290. Theshell270 has two mounts to support and electrically connect thelamp290 to the power supply.
• In a preferred embodiment, as shown in FIG. 5B, the[0087]shell270 comprises two separate surfaces. Thewall274ais located between thelamp290 and theinlet250. Thefirst wall274ais preferably “U”-shaped, with the concave surface facing thelamp290. The convex surface of thewall274ais preferably a non-reflective surface. Alternatively, the convex surface of thewall274amay reflect the light280 outward toward the passing airflow. Thewall274ais integrally formed with the removablerear panel224. When therear panel224 is removed from thehousing210, thewall274ais also removed, exposing thegermicidal lamp290. Thegermicidal lamp290 is easily accessible in order to, as an example, replace thelamp290 when it expires.
• The[0088]wall274b, as shown in FIG. 5B, is “V”-shaped. Thewall274bis located between thelamp290 and theelectrode assembly220 to prevent a user from directly looking through theoutlet260 and viewing the U radiation emitted from thelamp290. In a preferred embodiment, thewall274bis also a non-reflective surface. Alternatively, thewall274bmaybe a reflective surface to reflect the light280. It is within the scope of the present invention for thewall274bto have other shapes such as, but not limited to, “U”-shaped or “C”-shaped.
• The[0089]shell270 may also havefins272. Thefins272 are spaced apart and preferably substantially perpendicular to the passing airflow. In general, thefins272 further prevent the light280 from shining directly towards theinlet250 and theoutlet260. The fins have a black or non-reflective surface. Alternatively, thefins272 may have a reflective surface.Fins272 with a reflective surface may shine more light280 onto the passing airflow because the light280 will be repeatedly reflected and not absorbed by a black surface. Theshell270 directs the radiation towards thefins272, maximizing the light emitted from thelamp290 for irradiating the passing airflow. Theshell270 andfins272 direct theradiation280 emitted from thelamp290 in a substantially perpendicular orientation to the crossing airflow traveling through thehousing210. This prevents theradiation280 from being emitted directly towards theinlet250 or theoutlet260.
• FIG. 6[0090]
• FIG. 6 illustrates yet another embodiment of the[0091]device200. The embodiment shown in FIG. 6 is a smaller, more portable, desk version of the air transporter-conditioner. Air is brought into thehousing210 through theinlet250, as shown by the arrows marked “IN.” Theinlet250 in this embodiment is an air chamber having multiplevertical slots251 located along each side. In this embodiment, the slots are divided across the direction of the airflow into thehousing210. Theslots251 preferably are spaced apart a similar distance as thefins212 in the previously described embodiments, and are substantially the same height as the side walls of the air chamber. In operation, air enters thehousing210 by entering thechamber250 and then exiting thechamber250 through theslots251. The air contacts theinterior wall211 of thehousing210 and continues to travel through thehousing210 towards theoutlet260. Since therear wall253 of the chamber is a solid wall, thedevice200 only requires a singlenon-reflective housing270 located between thegermicidal lamp290 and theelectrode assembly220 and theoutlet260. Thehousing270 in FIG. 6 is preferably “U”-shaped, with theconvex surface270afacing thegermicidal lamp290. Thesurface270adirects the light280 toward theinterior surface211 of thehousing210 and maximizes the disbursement of radiation into the passing airflow. It is within the scope of the invention for thesurface270 to comprise other shapes such as, but not limited to, a “V”-shaped surface, or to have theconcave surface270bface thelamp290. Also in other embodiments thehousing270 can have a reflective surface in order to reflect radiation into the air stream. Similar to the previous embodiments, the air passes thelamp290 and is irradiated by the light280 soon after the air enters thehousing210, and prior to reaching theelectrode assembly220.
• FIGS.[0092]5A-6 illustrate embodiments of theelectrode assembly220. Theelectrode assembly220 comprises a firstemitter electrode array230 and a second particlecollector electrode array240, which is preferably located downstream of thegermicidal lamp290. The specific configurations of theelectrode array220 are discussed below, and it is to be understood that any of the electrode assembly configurations depicted in FIGS.8A-15C maybe used in the device depicted in FIGS.2A-6. It is theelectrode assembly220 that creates ions and causes the air to flow electro-kinetically between the firstemitter electrode array230 and the secondcollector electrode array240. In the embodiments shown in FIGS.5A-6, thefirst array230 comprises two wire-shapedelectrodes232, while thesecond array240 comprises three “U”-shapedelectrodes242. Each “U”-shaped electrode has anose246 and two trailingsides244. It is within the scope of the invention for thefirst array230 and thesecond array240 to include electrodes having other shapes as mentioned above and described below.
• Electrical Circuit for the Electro-Kinetic Device:[0093]
• FIGS.[0094]7A-7B illustrate a preferred embodiment of an electrical block diagram for the electro-kinetic device200 with enhanced anti-microorganism capability. FIG. 7A illustrates a preferred electrical block diagram of thegermicidal lamp circuit101. The main components of thecircuit101 are an electromagnetic interference (EMI)filter110, anelectronic ballast112, and aDC power supply114. Thedevice200 has an electrical power cord that plugs into a common electrical wall socket. The (EMI)filter110 is placed across the incoming 110VAC line to reduce and/or eliminate high frequencies generated by theelectronic ballast112 and thehigh voltage generator170. Theelectronic ballast112 is electrically connected to thegermicidal lamp290 to regulate, or control, the flow of current through thelamp290. Electrical components such as theEMI Filter110 andelectronic ballast112 are well known in the art and do not require a further description. TheDC Power Supply114 receives the 100VAC and outputs 12VDC for the internal logic of thedevice200, and 160VDC for the primary side of the transformer116 (see FIG. 7B).
• As seen in FIG. 7B, a high[0095]voltage pulse generator170 is coupled between thefirst electrode array230 and thesecond electrode array240. Thegenerator170 receives low input voltage, e.g., 160VDC fromDC power supply114, and generates high voltage pulses of at least 5 KV peak-to-peak with a repetition rate of about 20 KHz. Preferably, thevoltage doubler118 outputs 9 KV to thefirst array 230, and 18 KV to thesecond array240. It is within the scope of the present invention for thevoltage doubler118 to produce a greater or smaller voltage. The pulse train output preferably has a duty cycle of perhaps 10%, but may have other duty cycles, including a 100% duty cycle. The highvoltage pulse generator170 maybe implemented in many ways, and typically will comprise a lowvoltage converter oscillator124, operating at perhaps 20 KHz frequency, that outputs low voltage pulses to an electronic switch. Such a switch is shown as an insulated gate bipolar transistor (IGBT)126. TheIGBT126, or other appropriate switch, couples the low voltage pulses from theoscillator124 to the input winding of a step-uptransformer116. The secondary winding of thetransformer116 is coupled to thevoltage doubler118, which outputs the high voltage pulses to the first and second array ofelectrodes230,240. In general, theIGBT126 operates as an electronic on/off switch. Such a transistor is well known in the art and does not require a further description.
• The[0096]converter oscillator124 receives electrical signals from theairflow modulating circuit120, thepower setting circuit122, and theboost timer128. The airflow rate of thedevice200 is primarily controlled by theairflow modulating circuit120 and thepower setting circuit122. Theairflow modulating circuit120 is a “micro-timing” gating circuit. Theairflow modulating circuit120 outputs an electrical signal that modulates between a “low” airflow signal and a “high” airflow signal. Theairflow modulating circuit120 continuously modulates between these two signals, preferably outputting the “high” airflow signal for 2.5 seconds, and then the “low” airflow signal for 5 seconds. By way of example only, the “high” airflow signal causes thevoltage doubler118 to provide 9 KV to thefirst array230, while 18 KV is provided to thesecond array240, and the “low” airflow signal causes thevoltage doubler118 to provide 6 KV to thefirst array230, while 12 KV is provided to thesecond array240. As will be described later, the voltage difference between the first and second array is proportional to the airflow rate of thedevice200. In general, a greater voltage differential is created between the first and second array by the “high” airflow signal. It is within the scope of the present invention for theairflow modulating circuit120 to produce different voltage differentials between the first and second arrays. The various circuits and components comprising the highvoltage pulse generator170 can be fabricated on a printed circuit board mounted withinhousing210.
• The[0097]power setting circuit122 is a “macro-timing” circuit that can be set, by a control dial214 (described hereinafter), to a LOW, MED, or HIGH setting. The three settings determine how long the signal generated by theairflow modulating circuit120 will drive theoscillator124. When thecontrol dial214 is set to HIGH, the electrical signal output from theairflow modulating circuit120, modulating between the high and low airflow signals, will continuously drive theconnector oscillator124. When thecontrol dial214 is set to MED, the electrical signal output from theairflow modulating circuit120 will cyclically drive theoscillator124 for 25 seconds, and then drop to a zero or a lower voltage for 25 seconds. Thus, the airflow rate through thedevice200 is slower when thedial214 is set to MED than when thecontrol dial214 is set to HIGH. When thecontrol dial214 is set to LOW, the signal from theairflow modulating circuit120 will cyclically drive theoscillator124 for 25 seconds, and then drop to a zero or a lower voltage for 75 seconds. It is within the scope and spirit of the present invention for the HIGH, MED, and LOW settings to drive theoscillator124 for longer or shorter periods of time.
• The[0098]boost timer128 sends an electrical signal to theairflow modulating circuit120 and thepowersetting circuit122 when theboost button216 is depressed. Theboost timer128 when activated, instructs theairflow modulating circuit120 to continuously drive theconverter oscillator124 as if thedevice200 was set to the HIGH setting. Theboost timer128 also sends a signal to thepower setting circuit122 that shuts thepowersetting circuit122 temporarily off. In effect, theboost timer128 overrides the setting that thedevice200 is set to by thedial214. Therefore, thedevice200 will run at a maximum airflow rate for a 5 minute period.
• FIG. 7B further illustrates some preferred timing and maintenance features of the[0099]device200. Thedevice200 has a 2week timer130 that provides a reminder to the user to clean thedevice200, and anarc sensing circuit132 that may shut thedevice200 completely of fin case of arcing.
• Electrode Assembly with First and Second Electrodes:[0100]
• FIGS.[0101]8A-8F
• FIGS.[0102]8A-8F illustrate various configurations of theelectrode assembly220. The output from high voltagepulse generator unit170 is coupled to anelectrode assembly220 that comprises afirst electrode array230 and asecond electrode array240. Again, instead of arrays, a single electrode or single conductive surface can be substituted for one or botharray230 andarray240.
• The positive output terminal of[0103]unit170 is coupled tofirst electrode array230, and the negative output terminal is coupled tosecond electrode array240. It is believed that with this arrangement the net polarity of the emitted ions is positive, e.g., more positive ions than negative ions are emitted. This coupling polarity has been found to work well, including minimizing unwanted audible electrode vibration or hum. However, while generation of positive ions is conducive to a relatively silent airflow, from a health standpoint, it is desired that the output airflow be richer in negative ions, not positive ions. It is noted that in some embodiments, one port (preferably the negative port) of the highvoltage pulse generator170 need not be connected to the second array ofelectrodes240. Nonetheless, there will be an “effective connection” between thesecond array electrodes242 and one output port of the highvoltage pulse generator170, in this instance, via ambient air. Alternatively the negative output terminal ofunit170 can be connected to thefirst electrode array230 and the positive output terminal can be connected to thesecond electrode array240.
• With this arrangement an electrostatic flow of air is created, going from the[0104]first electrode array230 towards thesecond electrode array240. (This flow is denoted “OUT” in the figures.) Accordinglyelectrode assembly220 is mounted withintransporter system100 such thatsecond electrode array240 is closer to the OUT vents andfirst electrode array230 is closer to the IN vents.
• When voltage or pulses from high[0105]voltage pulse generator170 are coupled across first andsecond electrode arrays230 and240, a plasma-like field is created surroundingelectrodes232 infirst array230. This electric field ionizes the ambient air between the first and second electrode arrays and establishes an “OUT” airflow that moves towards thesecond array240. It is understood that the “IN” flow enters via vent(s)104 or250, and that the “OUT” flow exits via vent(s)106 or260.
• Ozone and ions are generated simultaneously by the[0106]first array electrodes232, essentially as a function of the potential fromgenerator170 coupled to the first array of electrodes or conductive surfaces. Ozone generation can be increased or decreased by increasing or decreasing the potential at thefirst array230. Coupling an opposite polarity potential to thesecond array electrodes242 essentially accelerates the motion of ions generated at thefirst array230, producing the airflow denoted as “OUT” in the figures. As the ions and ionized particles move toward thesecond array240, the ions and ionized particles push or move air molecules toward thesecond array240. The relative velocity of this motion maybe increased, by way of example, by decreasing the potential at thesecond array240 relative to the potential at thefirst array230.
• For example, if +10 KV were applied to the first array electrode(s)[0107]232, and no potential were applied to the second array electrode(s)242, a cloud of ions (whose net charge is positive) would form adjacent thefirst electrode array230. Further, the relatively high 10 KV potential would generate substantial ozone. By coupling a relatively negative potential to the second array electrode(s)242, the velocity of the air mass moved by the net emitted ions increases.
• On the other hand, if it were desired to maintain the same effective outflow (OUT) velocity, but to generate less ozone, the exemplary 10 KV potential could be divided between the electrode arrays. For example,[0108]generator170 could provide +4 KV (or some other fraction) to thefirst array electrodes232 and −6 KV (or some other fraction) to thesecond array electrodes242. In this example, it is understood that the +4 KV and the −6 KV are measured relative to ground. Understandably it is desired that theunit100 operates to output appropriate amounts of ozone. Accordingly, the high voltage is preferably fractionalized with about +4 KV applied to thefirst array electrodes232 and about −6 KV applied to thesecond array electrodes242.
• In the embodiments of FIGS. 8A and 8B,[0109]electrode assembly220 comprises afirst array230 of wire-shapedelectrodes232, and asecond array240 of generally “U”-shapedelectrodes242. In preferred embodiments, the number N1 of electrodes comprising thefirst array230 can preferably differ by one relative to the number N2 of electrodes comprising thesecond array240. In many of the embodiments shown, N2>N1. However, if desired, additionalfirst electrodes232 could be added at the outer ends ofarray230 such that N1>N2, e.g., fivefirst electrodes232 compared to foursecond electrodes242.
• As previously indicated, first or[0110]emitter electrodes232 are preferably lengths of tungsten wire, whereaselectrodes242 are formed from sheet metal, preferably stainless steel, although brass or other sheet metal could be used. The sheet metal is readily configured to defineside regions244 and abulbous nose region246, forming the hollow, elongated “U”-shapedelectrodes242. While FIG. 8A depicts fourelectrodes242 insecond array240 and threeelectrodes232 infirst array230, as noted previously, other numbers of electrodes in each array could be used, preferably retaining a symmetrically staggered configuration as shown. It is seen in FIG. 8A that whileparticulate matter60 is present in the incoming (IN) air, the outflow (OUT) air is substantially devoid of particulate matter, which adheres to the preferably large surface area provided by theside regions244 of thesecond array electrodes242.
• FIG. 8B illustrates that the spaced-apart configuration between the first and[0111]second arrays230,240 is staggered. Preferably, eachfirst array electrode232 is substantially equidistant from twosecond array electrodes242. This symmetrical staggering has been found to be an efficient electrode placement. Preferably, in this embodiment, the staggering geometry is symmetrical in thatadjacent electrodes232 oradjacent electrodes242 are spaced-apart a constant distance, Y1 and Y2 respectively. However, a non-symmetrical configuration could also be used. Also, it is understood that the number ofelectrodes232 and242 may differ from what is shown.
• In the embodiment of FIGS.[0112]8A, typically dimensions are as follows: diameter ofelectrodes232, R1, is about 0.08 mm, distances Y1 and Y2 are each about 16 mm, distance X1 is about 16 mm, distance L is about 20 mm, and electrode heights Z1 and Z2 are each about 1 m. The width W ofelectrodes242 is preferably about 4 mm, and the thickness of the material from whichelectrodes242 are formed is about 0.5 mm. Of course, other dimensions and shapes could be used. For example, preferred dimensions for distance X1 may vary between 12-30 mm, and the distance Y2 may vary between 15-30 mm. It is preferred thatelectrodes232 have a small diameter, such as R1 shown in FIG. 8B. The small diameter electrode generates a high voltage field and has a high emissivity. Both characteristics are beneficial for generating ions. At the same time, it is desired that electrodes232 (as well as electrodes242) be sufficiently robust to withstand occasional cleaning.
• [0113]Electrodes232 infirst array230 are electrically connected to a first (preferably positive) output port of highvoltage pulse generator170 by aconductor234.Electrodes242 insecond array240 are electrically connected to a second (preferably negative) output port ofhigh voltage generator170 by aconductor249. The first and second electrodes maybe electrically connected to thehigh voltage generator170 at various locations. Byway of example only, FIG. 8B depictsconductor249 making connection with someelectrodes242 internal tonose246, whileother electrodes242 make electrical connection toconductor249 elsewhere on theelectrode242. Electrical connection to thevarious electrodes242 could also be made on the electrode external surface, provided no substantial impairment of the outflow airstream results; however it has been found to be preferable that the connection is made internally.
• In this and the other embodiments to be described herein, ionization appears to occur at the[0114]electrodes232 in thefirst electrode array230, with ozone production occurring as a function of high voltage arcing. For example, increasing the peak-to-peak voltage amplitude and/or duty cycle of the pulses from the highvoltage pulse generator170 can increase ozone content in the output flow of ionized air. If desired, user-control S2 or thedial214 can be used to somewhat vary ozone content by varying amplitude and/or duty cycle. Specific circuitry for achieving such control is known in the art and need not be described in detail herein.
• Note the inclusion in FIGS. 8A and 8B of at least one[0115]output controlling electrodes243, preferably electrically coupled to the same potential as thesecond array electrodes242.Electrode243 preferably defines a pointed shape in side profile, e.g., a triangle. The sharp point onelectrodes243 causes generation of substantial negative ions (since the electrode is coupled to relatively negative high potential). These negative ions neutralize excess positive ions otherwise present in the output airflow, such that the “OUT” flow has a net negative charge.Electrode243 is preferably manufactured from stainless steel, copper, or other conductor material, and is perhaps 20 mm high and about 12 mm wide at the base. The inclusion of oneelectrode243 has been found sufficient to provide a sufficient number of output negative ions, but more such electrodes maybe included.
• In the embodiments of FIGS. 8A, 8B and[0116]8C, each “U”-shapedelectrode242 has two trailing surface orsides244 that promote efficient kinetic transport of the outflow of ionized air and ozone. For the embodiment of FIG. 8C, there is the inclusion on at least one portion of a trailing edge of apointed electrode region243′.Electrode region243′ helps promote output of negative ions, in the same fashion that was previously described with respect toelectrodes243, as shown in FIGS. 8A and 8B.
• In FIG. 8C and the figures to follow, the particulate matter is omitted for ease of illustration. However, from what was shown in FIGS.[0117]8A-8B, particulate matter will be present in the incoming air, and will be substantially absent from the outgoing air. As has been described,particulate matter60 typically will be electrostatically precipitated upon the surface area ofelectrodes242.
• As discussed above and as depicted by FIG. 8C, it is relatively unimportant where on an electrode array the electrical connection is made with the[0118]high voltage generator170. In this embodiment,first array electrodes232 are shown electrically connected together at their bottom regions byconductor234, whereassecond array electrodes242 are shown electrically connected together in their middle regions by theconductor249. Both arrays maybe connected together in more than one region, e.g., at the top and at the bottom. It is preferred that the wire or strips or other inter-connecting mechanisms be at the top, bottom, or periphery of thesecond array electrodes242, so as to minimize obstructing stream air movement through thehousing210.
• It is noted that the embodiments of FIGS. 8C and 8D depict somewhat truncated versions of the[0119]second electrodes242. Whereas dimension L in the embodiment of FIGS. 8A and 8B was about 20 mm, in FIGS. 8C and 8D, L has been shortened to about 8 mm. Other dimensions in FIG. 8C preferably are similar to those stated for FIGS. 8A and 8B. It will be appreciated that the configuration ofsecond electrode array240 in FIG. 8C can be more robust than the configuration of FIGS. 8A and 8B, by virtue of the shorter trailing edge geometry. As noted earlier, a symmetrical staggered geometry for the first and second electrode arrays is preferred for the configuration of FIG. 8C.
• In the embodiment of FIG. 8D, the outermost second electrodes, denoted[0120]242-1 and242-4, have substantially no outermost trailing edges. Dimension L in FIG. 8D is preferably about 3 mm, and other dimensions may be as stated for the configuration of FIGS. 8A and 8B. Again, the ratio of the radius or surface areas between thefirst electrode232 and thesecond electrodes242 for the embodiment of FIG. 8D preferably exceeds about 20:1.
• FIGS. 8E and 8F depict another embodiment of[0121]electrode assembly220, in which thefirst electrode array230 comprises asingle wire electrode232, and thesecond electrode array240 comprises a single pair of curved “L”-shapedelectrodes242, in cross-section. Typical dimensions, where different than what has been stated for earlier-described embodiments, are X1≈12 mm, Y2≈5 mm, and L1≈3 mm. The effective surface area or radius ratio between the electrode arrays is again greater than about 20:1. The fewerelectrodes comprising assembly220 in FIGS. 8E and 8F promote economy of construction, and ease of cleaning, although more than oneelectrode232, and more than twoelectrodes242 could of course be employed. This particular embodiment incorporates the staggered symmetry described earlier, in which electrode232 is equidistant from twoelectrodes242. Other geometric arrangements, which may not be equidistant, are within the spirit and scope of the invention.
• Electrode Assembly With an Upstream Focus Electrode:[0122]
• FIGS.[0123]9A-9B
• The embodiments illustrated in FIGS.[0124]9A-9B are somewhat similar to the previously described embodiments in FIGS.8A-8B. Theelectrode assembly220 includes a first array ofelectrodes230 and a second array ofelectrodes240. Again, for this and the other embodiments, the term “array of electrodes” may refer to a single electrode or a plurality of electrodes. Preferably, the number ofelectrodes232 in the first array ofelectrodes230 will differ by one relative to the number ofelectrodes242 in the second array ofelectrodes240. The distances L, X1, Y1, Y2, Z1 and Z2 for this embodiment are similar to those previously described in FIG. 8A.
• As shown in FIG. 9A, the[0125]electrode assembly220 preferably adds a third, or leading, or focus, ordirectional electrode224a,224b,224c(generally referred to as “electrode224”) upstream of each first electrode232-1,232-2,232-3. Thefocus electrode224 creates an enhanced airflow velocity exiting thedevices100 or200. In general, thethird focus electrode224 directs the airflow, and ions generated by thefirst electrode232, towards thesecond electrodes242. Eachthird focus electrode224 is a distance X2 upstream from at least one of thefirst electrodes232. The distance X2 is preferably 5-6 mm, or four to five diameters of thefocus electrode224. However, thethird focus electrode224 can be further from, or closer to, thefirst electrode232.
• The[0126]third focus electrode224 illustrated in FIG. 9A is a rod-shaped electrode. Thethird focus electrode224 can also comprise other shapes that preferably do not contain any sharp edges. Thethird focus electrode224 is preferably manufactured from material that will not erode or oxidize, such as stainless steel. The diameter of thethird focus electrode224, in a preferred embodiment, is at least fifteen times greater than the diameter of thefirst electrode232. The diameter of thethird focus electrode224 can be larger or smaller. The diameter of thethird focus electrode224 is preferably large enough so thatthird focus electrode224 does not function as an ion emitting surface when electrically connected with thefirst electrode232. The maximum diameter of thethird focus electrode224 is somewhat constrained. As the diameter increases, thethird focus electrode224 will begin to noticeably impair the airflow rate of theunits100 or200. Therefore, the diameter of thethird electrode224 is balanced between the need to form a non-ion emitting surface and airflow properties of theunit100 or200.
• In a preferred embodiment, each[0127]third focus electrode224a,224b,224care electrically connected with thefirst array230 and thehigh voltage generator170 by theconductor234. As shown in FIG. 9A, thethird focus electrodes224 are electrically connected to the same positive outlet of thehigh voltage generator170 as thefirst array230. Accordingly, thefirst electrode232 and thethird focus electrode224 generate a positive electrical field. Since the electrical fields generated by thethird focus electrode224 and thefirst electrode232 are both positive, the positive field generated by thethird focus electrode224 can push, or repel, or direct, the positive field generated by thefirst electrode232 towards thesecond array240. For example, the positive field generated by thethird focus electrode224awill push, or repel, or direct, the positive field generated by the first electrode232-1 towards thesecond array240. In general, thethird focus electrode224 shapes the electrical field generated by eachelectrode232 in thefirst array230. This shaping effect is believed to decrease the amount of ozone generated by theelectrode assembly220 and increases the airflow of theunits100 and200.
• The particles within the airflow are positively charged by the ions generated by the[0128]first electrode232. As previously mentioned, the positively charged particles are collected by the negatively chargedsecond electrodes242. Thethird focus electrode224 also directs the airflow towards the trailingsides244 of eachsecond electrode242. For example, it is believed that the airflow will travel around thethird focus electrode224, partially guiding the airflow towards the trailingsides244, improving the collection rate of theelectrode assembly220.
• The[0129]third focus electrode224 maybe located at various positions upstream of eachfirst electrode232. Byway of example only, athird focus electrode224bis located directly upstream of the first electrode232-2 so that the center of thethird focus electrode224bis in-line and symmetrically aligned with the first electrode232-2, as shown by extension line B. Extension line B is located midway between the second electrode242-2 and the second electrode242-3. Alternatively, athird focus electrode224 may also be located at an angle relative to thefirst electrode232. For example, athird focus electrode224amaybe located upstream of the first electrode232-1 along a line extending from the middle of thenose246 of the second electrode242-2 through the center of the first electrode232-1, as shown by extension line A. Thethird focus electrode224ais in-line and symmetrically aligned with the first electrode232-1 along extension line A. Similarly, thethird electrode224cis located upstream to the first electrode2323 along a line extending from the middle of thenose246 of the second electrode242-3 through the first electrode232-3, as shown by extension line C. Thethird focus electrode224cis in-line and symmetrically aligned with the first electrode232-3 along extension line C. It is within the scope of the present invention for theelectrode assembly220 to includethird focus electrodes224 that are both directly upstream and at an angle to thefirst electrodes232, as depicted in FIG. 9A. Thus, thefocus electrodes224 fan out relative to thefirst electrodes232.
• FIG. 9B illustrates that an[0130]electrode assembly220 may contain multiplethird focus electrodes224 upstream of eachfirst electrode232. By way of example only, thethird focus electrode224a2 is in-line and symmetrically aligned with thethird focus electrode224a1, as shown by extension line A. In a preferred embodiment, only thethird focus electrodes224a1,224b1,224c1 are electrically connected to thehigh voltage generator170 byconductor234. Accordingly, not all of thethird electrodes224 are at the same operating potential. In the embodiment shown in FIG. 9B, thethird focus electrodes224a1,224b1,224c1 are at the same electrical potential as thefirst electrodes232, while thethird focus electrodes224a2,224b2,224c2 are floating. Alternatively, thethird focus electrodes224a2,224b2 and224c2 maybe electrically connected to thehigh voltage generator170 by theconductor234.
• FIG. 9B illustrates that each[0131]second electrode242 may also have aprotective end241. In the previous embodiments, each “U”-shapedsecond electrode242 has an open end. Typically, the end of each trailing side orside wall244 contains sharp edges. The gap between the trailing sides orside walls244, and the sharp edges at the end of the trailing sides orside walls244, generate unwanted eddy currents. The eddy currents create a “backdraft,” or airflow traveling from the outlet towards the inlet, which slows down the airflow rate of theunits100 or200.
• In a preferred embodiment, the[0132]protective end241 is created by shaping, or rolling, the trailing sides orside walls244 inward and pressing them together, forming a rounded trailing end with no gap between the trailing sides or side walls of eachsecond electrode242. Accordingly, theside walls244 have outer surfaces, and the end of theside walls244 are bent back inward and towards thenose246 so that the outer surface of theside walls244 are adjacent to, or face, or touch each other to form a smooth trailing edge on thesecond electrode242. If desired, it is within the scope of the invention to spot weld the rounded ends together along the length of thesecond electrode242. It is also within the scope of the present invention to form theprotective end241 by other methods such as, but not limited to, placing a strap of plastic across each end of the trailingsides244 for the full length of thesecond electrode242. The rounded or capped end is an improvement over theprevious electrodes242 without aprotective end241. Eliminating the gap between the trailingsides244 also reduces or eliminates the eddy currents typically generated by thesecond electrode242. The rounded protective end also provides a smooth surface for purpose of cleaning the second electrode. In a preferred embodiment, the second orcollector electrode242 is a one-piece, integrally formed, electrode with a protective end.
• FIGS.[0133]10A-10D
• FIG. 10A illustrates an[0134]electrode assembly220 including a first array ofelectrodes230 having three wire-shaped first electrodes232-1,232-2,232-3 (generally referred to as “electrode232”) and a second array ofelectrodes240 having four “U”-shaped second electrodes242-1,242-2,242-3,242-4 (generally referred to as “electrode242”). Eachfirst electrode232 is electrically connected to thehigh voltage generator170 at the bottom region, whereas eachsecond electrode242 is electrically connected to the high-voltage generator170 in the middle to illustrate that the first andsecond electrodes232,242 can be electrically connected in a variety of locations.
• The[0135]second electrode242 in FIG. 10A is a similar version of thesecond electrode242 shown in FIG. 8C. The distance L has been shortened to about 8 mm, while the other dimensions X1, Y1, Y2, Z1, Z2 are similar to those shown in FIG. 8A.
• A third leading or focus[0136]electrode224 is located upstream of eachfirst electrode232. The inner mostthird focus electrode224bis located directly upstream of the first electrode232-2, as shown by extension line B. Extension line B is located midway between the second electrodes242-2,242-3. Thethird focus electrodes224a,224care at an angle with respect to the first electrodes232-1,232-3. For example, thethird focus electrode224ais upstream to the first electrode232-1 along a line extending from the middle of thenose246 of the second electrode242-2 extending through the center of the first electrode232-1, as shown by extension line A. Thethird electrode224cis located upstream of the first electrode232-3 along a line extending from the center of thenose246 of the second electrode242-3 through the center of the first electrode232-3, as shown by extension line C. Preferably, thefocus electrodes224 fan out relative to thefirst electrodes232 as an aid for directing the flow of ions and charged particles. FIG. 10B illustrates that thethird focus electrodes224 and thefirst electrode232 may be electrically connected to thehigh voltage generator170 byconductor234.
• FIG. 10C illustrates that a pair of[0137]third focus electrodes224 may be located upstream of eachfirst electrode232. Preferably, the multiplethird focus electrodes224 are inline and symmetrically aligned with each other. For example, thethird focus electrode224a2 is in-line and symmetrically aligned with thethird focus electrode224a1, along extension line A. As previously mentioned, preferably only third focuselectrodes224a1,224b1,224c1 are electrically connected with thefirst electrodes232 byconductor234. It is also within the scope of the present invention to have none or all of thethird focus electrodes224 electrically connected to thehigh voltage generator170.
• FIG. 10D illustrates[0138]third focus electrodes224 added to theelectrode assembly220 shown in FIG. 8D. Preferably, athird focus electrode224 is located upstream of eachfirst electrode232. For example, thethird focus electrode224bis in-line and symmetrically aligned with the first electrode232-2, as shown by extension line B. Extension line B is located midway between the second electrodes242-2,242-3. Thethird focus electrode224ais in-line and symmetrically aligned with the first electrode232-1, as shown by extension line A. Similarly, thethird electrode224cis in-line and symmetrically aligned with the first electrode232-3, as shown by extension line C. Extension lines A and C extend from the middle of thenose246 of the “U”-shaped second electrodes242-2,242-3 through the first electrodes232-1,232-3, respectively. In a preferred embodiment, thethird electrodes224a,224b,224cwith thehigh voltage generator170 by theconductor234. This embodiment can also include a pair ofthird focus electrodes224 upstream of eachfirst electrode232 similar to the embodiment depicted in FIG. 10C.
• FIGS.[0139]11A-11C
• FIGS.[0140]11A-11C illustrate that theelectrode assembly220 shown in FIG. 8E may include athird focus electrode224 upstream of the first array ofelectrodes230 comprising asingle wire electrode232. Preferably, the center of thethird focus electrode224 is in-line and symmetrically aligned with the center of thefirst electrode232, as shown by extension line B. Extension line B is located midway between thesecond electrodes242. The distances X1, X2, Y1, Y2, Z1 and Z2 are similar to the embodiments previously described. Thefirst electrode232 and thesecond electrodes242 maybe electrically connected to the high-voltage generator170 byconductor234,249 respectively. It is within the scope of the present invention to connect the first and second electrodes to opposite ends of the high voltage generator170 (e.g., thefirst electrode232 may be negatively charged and thesecond electrode242 maybe positively charged). In a preferred embodiment, thethird focus electrode224 is also electrically connected to thehigh voltage generator170.
• FIG. 11B illustrates that a pair of[0141]third focus electrodes224a,224bmaybe located upstream of thefirst electrode232. Thethird focus electrodes224a,224bare in-line and symmetrically aligned with thefirst electrode232, as shown by extension line B. Extension line B is located midway between thesecond electrodes242. Preferably, thethird focus electrode224bis upstream ofthird focus electrode224aa distance equal to the diameter of athird focus electrode224. In a preferred embodiment, only thethird focus electrode224ais electrically connected to thehigh voltage generator170. It is within the scope of the present invention to electrically connect boththird focus electrodes224a,224bto thehigh voltage generator170.
• FIG. 11C illustrates that each[0142]third focus electrode224 can be located at an angle with respect to thefirst electrode232. Similar to the previous embodiments, thethird focus electrode224a1 and224b1 is located a distance X2 upstream from thefirst electrode232. By way of example only, thethird focus electrodes224a1,224a2 are located along a line extending from the middle of the second electrode242-2 through the center of thefirst electrode232, as shown by extension line A. Similarly, thethird focus electrodes224b1,224b2 are along a line extending from the middle of the second electrode242-1 through the middle of thefirst electrode232, as shown by extension line B. Thethird focus electrode224a2 is in-line and symmetrically aligned with thethird focus electrode224a1 along extension line A. Similarly, thethird focus electrode224b2 is in line and symmetrically aligned with thethird focus electrode224b1, along extension line B. Thethird focus electrodes224 are fanned out and form a “V” pattern upstream offirst electrode232. In a preferred embodiment, only thethird focus electrodes224a1 and224b1 are electrically connected to the high-voltage generator170 byconductor234. It is within the scope and spirit of the invention to electrically connect thethird focus electrodes224aand224b2 to thehigh voltage generator170.
• FIGS.[0143]12A-12B
• The previously described embodiments of the[0144]electrode assembly220 disclose a rod-shapedthird focus electrode224 upstream of the first array ofelectrodes230. FIG. 12A illustrates an alternative configuration for thethird focus electrode224. Byway of example only, theelectrode assembly220 may include a “U”-shaped or possibly “C”-shapedthird focus electrode224 upstream of eachfirst electrode232. Thethird focus electrode224 may also have other curved configurations such as, but not limited to, circular-shaped, elliptical-shaped, parabolically-shaped, and other concave shapes facing thefirst electrode232. In a preferred embodiment, thethird focus electrode224 hasholes225 extending through, forming a perforated surface to minimize the resistance of thethird focus electrode224 on the airflow rate.
• In a preferred embodiment, the[0145]third focus electrode224 is electrically connected to thehigh voltage generator170 byconductor234. Thethird focus electrode224 in FIG. 12A is preferably not an ion emitting surface. Similar to previous embodiments, thethird focus electrode224 generates a positive electric field and pushes or repels the electric field generated by thefirst electrode232 towards thesecond array240.
• FIG. 12B illustrates that a perforated “U”-shaped or “C”-shaped[0146]third focus electrode224 can be incorporated into theelectrode assembly220 shown in FIG. 8A. Even though only two configurations of theelectrode assembly220 are shown with the perforated “U”-shapedthird focus electrode224, all the embodiments described in FIGS.8A-15C may incorporate the perforated “U”-shapedthird focus electrode224. It is also within the scope of the invention to have multiple perforated “U”-shapedthird focus electrodes224 upstream of eachfirst electrode232. Further in other embodiments the “U”-shapedthird focus electrode224 can be made of a screen or a mesh.
• FIG. 12C illustrates[0147]third focus electrodes224 similar to those depicted in FIG. 12B, except that thethird focus electrodes224 are rotated by 180° to preset a convex surface facing to thefirst electrodes232 in order to focus and direct the field of ions and airflow from thefirst electrode232 toward the second array ofelectrodes240. Thesethird focus electrodes224 shown in FIGS.12A-12C are located along extension lines A, B, C similar to previously described embodiments.
• Electrode Assembly With a Downstream Trailing Electrode:[0148]
• FIGS.[0149]13A-13C
• FIGS.[0150]13A-13C illustrate anelectrode assembly220 having an array of trailingelectrodes245 added to anelectrode assembly220 similar to that shown in FIG. 11A. It is understood that an alternative embodiment similar to FIG. 13A may include a trailing electrode or electrodes without any focus electrodes and be within the spirit and scope of the invention.
• Referring now to FIGS.[0151]13A-13B, each trailingelectrode245 is located downstream of the second array ofelectrodes240. Preferably, the trailingelectrodes245 are located downstream from eachsecond electrode242 by at least three times the radius R2 (see FIG. 13B). Further, the trailingelectrodes245 are preferably directly downstream of eachsecond electrode242 so as not to interfere with the flow of air. Also, the trailingelectrode245 is aerodynamically smooth, for example, circular, elliptical, or teardrops shaped in cross-section SO as not to unduly interfere with the smoothness of the airflow thereby. In a preferred embodiment, the trailingelectrodes245 are electrically connected to the same outlet of thehigh voltage generator170 as the second array ofelectrodes240. As shown in FIG. 13A, thesecond electrodes242 and the trailingelectrodes245 have a negative electrical charge. This arrangement can introduce more negative charges into the air stream. Alternatively, the trailingelectrodes245 can have a floating potential if they are not electrically connected to thesecond electrode242 or thehigh voltage generator170. The trailingelectrodes245 can also be grounded in other embodiments.
• When the trailing[0152]electrodes245 are electrically connected to thehigh voltage generator170, the positively charged particles within the airflow are also attracted to, and collect on, the trailingelectrodes245. In anelectrode assembly220 with no trailingelectrode245, most of the particles will collect on the surface area of thesecond electrodes242. However, some particles will pass through theunit200 without being collected by thesecond electrodes242. Thus, the trailingelectrodes245 serve as a second surface area to collect the positively charged particles. The trailingelectrodes245, having the same polarity as thesecond electrodes242, also deflect charged particles toward thesecond electrodes242.
• The trailing[0153]electrodes245 preferably also emit a small amount of negative ions into the airflow. The negative ions emitted by the trailingelectrode245 attempt to neutralize the positive ions emitted by thefirst electrodes232. If the positive ions emitted by thefirst electrodes232 are not neutralized before the airflow reaches theoutlet260, theoutlet fins212 may become electrically charged, and particles within the airflow may tend to stick to thefins212. If this occurs, the particles collected by thefins212 will eventually block or minimize the airflow exiting theunit200.
• FIG. 13C illustrates another embodiment of the[0154]electrode assembly200, having trailingelectrodes245 added to an embodiment similar to that shown in FIG. 11C. The trailingelectrodes245 are located downstream of thesecond array240 similar to the previously described embodiments above. It is within the scope of the present invention to electrically connect the trailingelectrodes245 to thehigh voltage generator170. The trailingelectrodes245 emit negative ions to neutralize the positive ions emitted by thefirst electrode232. As shown in FIG. 13C, all of thethird focus electrodes224 are electrically connected to thehigh voltage generator170. In a preferred embodiment, only thethird focus electrodes224a1,224b1 are electrically connected to thehigh voltage generator170, and thethird focus electrodes224a2,224b2 have a floating potential.
• Electrode Assemblies With Various Combinations of Focus Electrodes. Trailing Electrodes and Enhanced Second Electrodes With Protective Ends:[0155]
• FIGS.[0156]14A-14D
• FIG. 14A illustrates an[0157]electrode assembly220 that includes a first array ofelectrodes230 having two wire-shaped electrodes232-1,232-2 (generally referred to as “electrode232”) and a second array ofelectrodes240 having three “U”-shaped electrodes242-1,242-2,242-3 (generally referred to as “electrode242”). Upstream from eachfirst electrode232, at a distance X2, is athird focus electrode224. Eachthird focus electrode224a,224bis at an angle with respect to afirst electrode232. For example, thethird focus electrode224ais preferably along a line extending from the middle of thenose246 of the innermost second electrode242-2 through the center of the first electrode232-1, as shown by extension line A. Thethird focus electrode224ais in-line and symmetrically aligned with the first electrode232-1 along extension line A. Similarly, thethird focus electrode224bis located along a line extending from middle of thenose246 of the second electrode242-2 through the center of the first electrode232-2, as shown by extension line B. Thethird focus electrode224bis in-line and symmetrically aligned with the first electrode232-2 along extension line B. As previously described, the diameter of eachthird focus electrode224 is preferably at least fifteen times greater than the diameter of thefirst electrode232. As shown in FIG. 14A, and similar to the embodiment shown in FIG. 9B, each second electrode preferably has aprotective end241. Similar to previous embodiments, thethird focus electrodes224 are preferably electrically connected to thehigh voltage generator170. It is within the spirit and scope of the invention to not electrically connect thethird focus electrodes224 with thehigh voltage generator170.
• FIG. 14B illustrates that multiple[0158]third focus electrodes224 maybe located upstream of eachfirst emitter electrode232. For example, thethird focus electrode224a2 is inline and symmetrically aligned with thethird focus electrode224a1 along extension line A. Similarly, thethird focus electrode224b2 is in-line and symmetrically aligned with the third focus electrode242b1 along extension line B. It is within the scope of the present invention to electrically connect all, or none of, thethird focus electrodes224 to the high-voltage generator170. In a preferred embodiment, only thethird focus electrodes224a1,224b1 are electrically connected to thehigh voltage generator170, while thethird focus electrodes224a2,224b2 have a floating potential.
• FIG. 14C illustrates that the[0159]electrode assembly220 shown in FIG. 14A may also include a trailingelectrode245 downstream of eachsecond electrode242. Each trailingelectrode245 is in-line with thesecond electrode242 to minimize the interference with the airflow passing thesecond electrode242. Each trailingelectrode245 is preferably located a distance downstream of eachsecond electrode242 equal to at least three times the width W of thesecond electrode242. It is within the scope of the present invention to locate the trailingelectrode245 at other distances downstream of thesecond electrode242. The diameter of the trailingelectrode245 is preferably no greater than the width W of thesecond electrode242 to limit the interference of the airflow coming off thesecond electrode242.
• Another aspect of the trailing[0160]electrode245 is to direct the air trailing off thesecond electrode242 to provide a more laminar flow of air exiting theoutlet260. Yet another aspect of the trailingelectrode245, as previously mentioned above, is to neutralize the positive ions generated by thefirst array230 and collect particles within the airflow. As shown in FIG. 14C, each trailingelectrode245 is electrically connected to asecond electrode242 by aconductor248. Similar to previous embodiments, the trailingelectrode245 has the same polarity as thesecond electrode242, and serves as a collecting surface, similar to thesecond electrode242, to attract the oppositely charged particles in the airflow. Alternatively, the trailing electrode may be connected to a ground or having a floating potential.
• FIG. 14D illustrates that a pair of[0161]third focus electrodes224 maybe located upstream of eachfirst electrode232. For example, thethird focus electrode224a2 is upstream of thethird focus electrode224a1 so that thethird focus electrodes224a1,224a2 are in-line and symmetrically aligned with each other along extension line A. Similarly, thethird focus electrode224b2 is in line and symmetrically aligned with thethird focus electrode224b1 along extension line B. As previously described, preferably only thethird focus electrodes224a1,224b1 are electrically connected to thehigh voltage generator170, while thethird focus electrodes224a2,224b2 have a floating potential. It is within the spirit and scope of the present invention to electrically connect all, or none, of the third focus electrodes to thehigh voltage generator170.
• Electrode Assemblies With Second Collector Electrodes Having Interstitial Electrodes:[0162]
• FIGS.[0163]14E-14F
• FIG. 14E illustrates another embodiment of the[0164]electrode assembly220 with aninterstitial electrode246. In this embodiment, theinterstitial electrode246 is located midway between thesecond electrodes242. For example, theinterstitial electrode246ais located midway between the second electrodes242-1,242-2, while theinterstitial electrode246bis located midway between second electrodes242-2,242-3. Preferably, theinterstitial electrode246a,246bare electrically connected to thefirst electrodes232, and generate an electrical field with the same positive or negative charge as thefirst electrodes232. Theinterstitial electrode246 and thefirst electrode232 then have the same polarity. Accordingly, particles traveling toward theinterstitial electrode246 will be repelled by theinterstitial electrode246 towards thesecond electrodes242. Alternatively, the interstitial electrodes can have a floating potential or be grounded.
• It is to be understood that[0165]interstitial electrodes246a,246bmay also be closer to one second collector electrode than to the other. Also, theinterstitial electrodes246a,246bare preferably located substantially near or at theprotective end241 or ends of the trailingsides244, as depicted in FIG. 14E. Still further the interstitial electrode can be substantially located along a line between the two trailing portions or ends of the second electrodes. These rear positions are preferred as the interstitial electrodes can cause the positively charged particle to deflect towards the trailingsides244 along the entire length of the negatively chargedsecond collector electrode242, in order for thesecond collector electrode242 to collect more particles from the airflow.
• Still further, the[0166]interstitial electrodes246a,246bcan be located upstream along the trailingside244 of thesecond collector electrodes244. However, the closer theinterstitial electrodes246a,246bget to thenose246 of thesecond electrode242, generally the less effectiveinterstitial electrodes246a,246bare in urging positively charged particles toward the entire length thesecond electrodes242. Preferably, theinterstitial electrodes246a,246bare wire-shaped and smaller or substantially smaller in diameter than the width “W” of thesecond collector electrodes242. For example, the interstitial electrodes can have a diameter of, the same as, or on the order, of the diameter of the first electrodes. For example, the interstitial electrodes can have a diameter of one-sixteenth of an inch. Also, the diameter of theinterstitial electrodes246a,246bis substantially less than the distance between second collector electrodes, as indicated by Y2. Further the interstitial electrode can have a length or diameter in the downstream direction that is substantially less than the length of the second electrode in the downstream direction. The reason for this size of theinterstitial electrodes246a,246bis so that theinterstitial electrodes246a,246bhave a minimal effect on the airflow rate exiting thedevice100 or200.
• FIG. 14F illustrates that the[0167]electrode assembly220 in FIG. 14E can include a pair ofthird electrodes224 upstream of eachfirst electrode232. As previously described, the pair ofthird electrodes224 are preferably in-line and symmetrically aligned with each other. For example, thethird electrode224a2 is in-line and symmetrically aligned with thethird electrode224a1 along extension line A. Extension line A preferably extends from the middle of thenose246 of the second electrode242-2 through the center of the first electrode232-1. As previously disclosed, in a preferred embodiment, only thethird electrodes224a1,224b1 are electrically connected to thehigh voltage generator170. In FIG. 14F, a plurality ofinterstitial electrode296aand246bare located between thesecond electrodes242. Preferably these interstitial electrodes are in-line and have a potential gradient with an increasing voltage potential on each successive interstitial electrode in the downstream direction in order to urge particles toward the second electrodes. In this situation the voltage on the interstitial electrodes would have the same sign as the voltage on thefirst electrode232. Electrode Assembly With an Enhanced First Emitter Electrode Being Slack: FIGS.15A-15C
• The previously described embodiments of the[0168]electrode assembly220 include a first array ofelectrodes230 having at least one wire or rod shapedelectrode232. It is within the scope of the present invention for the first array ofelectrodes230 to contain electrodes consisting of other shapes and configurations.
• FIG. 15A illustrates that the first array of[0169]electrodes230 may include curved or slack wire-shaped electrodes252. The curved wire-shaped electrode252 is an ion emitting surface and generates an electric field similar to the previously described wire-shapedelectrodes232. In this embodiment, theelectrode assembly220 includes a first array ofelectrodes230 having three curved electrodes252, and a second array ofelectrodes240 having four “U”-shapedelectrodes242. Eachsecond electrode242 is “downstream,” and eachthird focus electrode224 is “upstream,” to the curved wire-shaped electrodes252 similar to the embodiment shown in FIG. 9A. The electrical properties and characteristics of thesecond electrodes242 andthird focus electrode224 are similar to the previously described embodiment shown in FIG. 9A. It is to be understood that an alternative embodiment of FIG. 15A can exclude the focus electrodes and be within the spirit and scope of the invention.
• As shown in FIG. 15A, positive ions are generated and emitted by the first electrode[0170]252. In general, the quantity of negative ions generated and emitted by the first electrode is proportional to the surface area of the first electrode. The height Z1 of the first electrode252 is equal to the height Z1 of the previously disclosed wire-shapedelectrode232. However, the total length of the electrode252 is greater than the total length of theelectrode232. By way of example only, and in a preferred embodiment, if the electrode252 was straightened out, the curved or slack wire electrode252 is 15-30% longer than the rod or wire-shapedelectrode232. The curved electrode252 is allowed to be slack to achieve the shorter height Z1. When a wire is held slack, the wire may form a curved shape similar to the first electrode252 shown in FIG. 15A. The greater total length of the curved electrode252 translates to a larger surface area than the wire-shapedelectrode232. Thus, the electrode252 will generate and emit more ions than theelectrode232. Ions emitted by the first electrode array attach to the particulate matter within the airflow. The charged particulate matter is attracted to, and collected by, the oppositely chargedsecond collector electrodes242. Since the electrodes252 generate and emit more ions than the previously described rod or wire shapedelectrodes232, more particulate matter will be removed from the airflow.
• FIG. 15B illustrates that the first array of[0171]electrodes230 may include flat coil wire-shapedelectrodes254. Each flat coil wire-shapedelectrode254 also has a larger surface area than the previously disclosed wire-shapedelectrode232. By way of example only, and in a preferred embodiment, if theelectrode254 was straightened out, theelectrode254 will have a total length that is preferably 10% longer than the rod shapedelectrode232. Since the height of theelectrode254 remains at Z1, theelectrode254 has a “kinked” configuration as shown in FIG. 15B. This greater length translates to a larger surface area of theelectrode254 than the surface area of theelectrode232. Accordingly, theelectrode254 will generate and emit a greater number of ions thanelectrode232. It is to be understood that an alternative embodiment of FIG. 15B can exclude the focus electrodes and be within the spirit and scope of the invention.
• FIG. 15C illustrates that the first array of[0172]electrodes230 may also include coiled wire-shapedelectrodes256. Again, the height Z1 of theelectrodes256 are similar to the height Z1 of the previously described rod shapedelectrodes232. However, the total length of eachelectrode256 is greater than the total length of the rod-shapedelectrodes232. By way of example only, and in a preferred embodiment, if thecoiled electrode256 was straightened out, eachelectrode256 will have a total length two to three times longer than the wire-shapedelectrodes232. Thus, theelectrodes256 have a larger surface area than theelectrodes232, and generate and emit more ions than thefirst electrodes232. The diameter of the wire that is coiled to produce theelectrode256 is similar to the diameter of theelectrode232. The diameter of theelectrode256 itself is preferably 1-3 mm, but can be smaller in accordance with the diameter offirst emitter electrode232. The diameter of theelectrode256 shall remain small enough so that theelectrode256 has a high emissivity and is an ion emitting surface. It is to be understood that an alternative embodiment of FIG. 15C can exclude the focus electrodes and be within the spirit and scope of the invention.
• The[0173]electrodes252,254 and256 shown in FIGS.15A-15C maybe incorporated into any of theelectrode assembly220 configurations previously disclosed in this application.
• The foregoing description of the preferred embodiments of the present invention has been provided for the purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations will be apparent to the practitioner skilled in the art. Modifications and variations may be made to the disclosed embodiments without departing from the subject and spirit of the invention as defined by the following claims. Embodiments were chosen and described in order to best describe the principles of the invention and its practical application, thereby enabling others skilled in the art to understand the invention, the various embodiments and with various modifications that are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the following claims and their equivalents.[0174]

Claims (14)

What is claimed is:

1. An air transporter-conditioner comprising:

a housing having a top and a removable inlet and an outlet;

an ion generator, when energized, that can create an airflow between the inlet and the outlet, and including a first electrode and a second electrode, and a voltage generator coupled between the first electrode and the second electrode;

said second electrode being removably mounted in said housing so that the second electrode can be removed for cleaning, and wherein said second electrode is removable through said top of said housing;

a germicidal lamp that can expose the airflow to germicidal radiation, disposed in said house, said germicidal lamp removably mounted in said housing such that after said inlet is removed, said germicidal lamp can be removed.

2. The air transporter-conditioner ofclaim 1 wherein:

said housing has a side extending downwardly from said top and said inlet is located through said side.

3. The air transporter-conditioner ofclaim 1 wherein said housing is elongated and said inlet and said outlet are covered with elongated fins which extend along a direction of the elongated housing.

4. The air transporter-conditioner ofclaim 1 wherein said housing is vertically upstanding and said inlet and said outlet are covered with vertical elongated fins.

5. An air transporter-conditioner comprising:

a housing having an inlet and an outlet;

an ion generator which, when energized, that can create an airflow between the inlet and the outlet, and including a first electrode and a second electrode, and a voltage generator coupled between the first electrode and the second electrode;

said second electrode being removably mounted in said housing so that the second electrode can be removed for cleaning; and

a germicidal lamp exposing the airflow to germicidal radiation, disposed in said house, said germicidal lamp removably mounted in said housing such that said germicidal lamp can be changed.

6. The air transporter-conditioner ofclaim 5 wherein said housing has a top and said second electrode and said germicidal lamp are removable through said top.

7. The air transporter-conditioner ofclaim 5 wherein said housing has a top and a side and the second electrode is removable through said top and said germicidal lamp is removable through said sides.

8. The air transporter-conditioner ofclaim 5 wherein:

said housing has a top and said second electrode has a first handle located on said top, which first handle can be used to lift said second electrode out of said housing through said top; and

said germicidal lamp has a second handle, which second handle located on said top, which second handle can be used to lift said germicidal lamp out of said housing through said top.

9. An air transporter-conditioner comprising:

an upstanding, elongated housing having a top and a side wall extending downwardly from said top, said housing further including an inlet defined through said side wall and an outlet;

said inlet removably mounted to said side wall;

an ion generator which, when energized, that can create an airflow between the inlet and the outlet, and including a first electrode and a second electrode, and a voltage generator coupled between the first electrode and the second electrode;

said second electrode being removably mounted in said housing so that the second electrode can be removed for cleaning;

said top of said housing including a port through which said second electrode can be removed;

a germicidal lamp exposing the airflow to germicidal radiation, disposed in said house, said germicidal lamp removably mounted in said housing such that said germicidal lamp can be changed; and

said germicidal lamp removably mounted in said housing adjacent to said removable inlet so that after said removable inlet is removed, said germicidal lamp can be removed.

10. The air transporter-conditioner ofclaim 9 wherein said second electrode is elongated along a direction of elongation of said housing.

11. A method for maintaining an air transporter-conditioner having a housing with a top and a side, and an ion generator in said housing which ion generator includes a first ion emitter electrode and a second collector electrode, and a germicidal device in said housing, comprising the steps of in any order and with the steps occurring within a relatively short period of time or over a substantial period of operation of the air transporter-conditioner:

removing the second collector electrode through the top of said housing for cleaning;

removing the germicidal device through said side for replacing a germicidal lamp;

replacing the second collector electrode through the top of said housing into said housing; and

placing a new germicidal lamp into said housing.

12. The method ofclaim 11 including preparatory to removing the germicidal device, the step of removing a side wall of the housing.

13. The method ofclaim 11 including preparatory to removing the germicidal device, the step of removing a side outlet vent located in said side of said housing.

14. The method ofclaim 11 including preparatory to removing the germicidal device, the step of removing a side vertically louvered vent located in said side of said housing.

Images