CN214596848U - Air purifier and electric air purifying respirator - Google Patents

Abstract

The utility model particularly relates to a portable air cleaner, a transparent respirator and a positive pressure formula electric air purification respirator. The utility model relates to an air purifier, casing and fan's casing are integrative, the casing of filter cartridge and air purifier's casing also are integrative, and its gas outlet is in the side of casing, the air inlet in the front of casing, and the display module is at the top surface of casing, its low in manufacturing cost, compact structure, be convenient for wear and use. The utility model relates to an air purifier adopts the design of dismantling the battery, and long-time person of wearing only needs to change the battery. The utility model relates to a transparent half face guard's light in weight wears comfortablely, makes things convenient for face identification.

Description

Air purifier and electric air purifying respirator

Technical Field

The utility model particularly relates to a portable air cleaner, a transparent respirator and a positive pressure formula electric air purification respirator.

Background

Along with the spread of the global new coronavirus epidemic situation, the virus mutation is faster and faster, and the infectivity is also enhanced. In a closed environment, the conventional KN95/N95 mask has a certain leakage rate, and the wearer still has an infection risk. The positive pressure respirator can improve the designated protection factor (ordered protection factor/APF, and the respiratory protection article can be expected to reduce the concentration of air pollutants by a multiple when being used correctly), thereby providing better protection for epidemic prevention of people.

A powered air-purifying respirator (PAPR) is a commonly used positive pressure respirator used in environments containing dust or harmful gases or bacterial viruses. The electric air purifying respirator consists of an electric air purifier and a breathing protective cover (a mask, a half mask, a full mask, a hood, an isolation suit and the like), wherein the electric air purifier comprises an electric air supply assembly (or an electric air supply machine) and a filtering assembly (or a filter). The electric air purifier filters air through the filtering component, and the filtered air is pressurized and then sent to the breathing protective cover through the electric air supply component, and a certain positive pressure value is kept inside the breathing protective cover relative to the outside. Compared with the traditional self-suction respirator or breathing mask, the positive pressure type electric air purification respirator can overcome the resistance generated during air filtration and reduce the breathing burden of a user; and under the same conditions, the designated protection factor of the electric air purifying respirator is about 10-50 times that of the self-suction respirator.

At present, although the positive pressure type electric air purifying respirator for dust prevention, harmful gas prevention or virus prevention has high protection factor, the positive pressure type electric air purifying respirator has complex structure, higher cost, heavier weight and large volume, and is inconvenient to carry about daily. CN102811772A discloses a powered air purifying respirator, which has good protection effect and is suitable for professional people to use in high pollution environment, but the air purifying component (including the blower, the filter box and the battery) of the respirator is relatively heavy, for example, the weight of the air purifying component in a 3M Adlfo powered respirator exceeds 1 kg. CN210020900U discloses a portable powered respirator, which, although improved in portability relative to other conventional powered respirators, still weighs up to 1 kg in the company's powered air cleaner. These professional-type powered respirators are tens or even hundreds of times more expensive than self-priming half-masks, and use a specialized filter (cotton or toxin filter cartridge) that costs tens or even hundreds of times more than the flat KN95 filter (as shown in FIG. 9). Therefore, the professional type electric respirator is relatively high in purchase cost and use cost, large and heavy, uncomfortable to wear, and not suitable for protection in low-pollution environments, such as daily haze prevention and daily epidemic prevention.

CN104288923A, CN105169826A and CN209991558U each provide a portable air purifier. The three air purifiers integrate the electric blower and the filtering component into a whole and have compact structure, wherein the weight of the machine in CN105169826A is less than 200 g. The purifier is usually combined with a special breathing mask, the air quantity is smaller than that of a professional electric respirator, and the breathing mask is breathable as a whole, so that the pressure difference inside and outside the mask is small, and the positive pressure protection effect is not ideal. Although the purifier is convenient to carry about, the purifier is only suitable for common dust prevention and haze prevention. The filter components used by them are usually high efficiency air filters (high efficiency particulate air filters/HEPA), the filter materials are glass fiber filter paper, polypropylene (PP) filter paper or polypropylene-polyethylene terephthalate (PP-PET) composite filter paper; the HEPA filter is a customized product and has higher cost, the cost is usually more than ten times that of KN95 filter cotton, and the HEPA filter is inconvenient to repeatedly sterilize and use. In the daily epidemic prevention aspect, the portable air purifier is greatly restricted in application due to the high cost of consumables (filter materials and masks). The product has the problems of insufficient endurance time for people needing to match for a long time due to the requirement of smaller volume and weight and limited capacity of the battery. In addition, the portable air purifier is usually used with a breathing mask or a half-mask, and because the conventional breathing mask and the half-mask are not transparent, the non-transparent mask and the non-transparent mask are probably not accepted in occasions requiring face recognition, such as attendance checking, airport security check and the like.

The professional type electric air purifying respirator in CN102811772A, the air inlet of hood is at hood back lower extreme, and the gas outlet setting of turbine unit is at the top surface of casing, and this kind of setting does not need the bending when making respiratory tube connect both ends, because the turbine unit is at the back, and inconvenient observation and operation, this patent provides long-range wireless control very much. The outlet of the portable air purifiers mentioned in CN104288923A, CN105169826A and CN209991558U are all arranged on the top surface of the housing, and this arrangement is based on that the inlet of the breathing mask is arranged on the side of the mask, and the connected breathing tube is bent by only about 90 degrees. Because the air outlet occupies 30-40% of the area of the top surface, the fan is close to the top surface, the upper end of the shell has insufficient volume, and the top surface has insufficient area for arranging a digital display assembly and a control button; moreover, if the display assembly and control buttons are mounted on the top surface, the arrangement is such that the breathing tube obscures the wearer's view when the wearer is using the device, which may interfere with viewing and use.

From the above patent analysis, the disclosed powered air purifying respirator has the following problems:

1) professional respirators are large and heavy, have high purchase cost and use cost, and are not suitable for daily dust prevention or daily epidemic prevention.

2) The compact air purifier has high material cost, inconvenient disassembly of filter materials and is not suitable for daily epidemic prevention.

3) The air outlet of the air purifier for the existing respirator is usually arranged on the top surface of the shell, so that the sight of a wearer is influenced, and the upper end of the compact air purifier is not provided with enough space and area for arranging the display component and the control button.

4) The battery capacity of the compact air purifier station can not meet the requirement of people who wear the air purifier for a long time.

5) The compact air purifier is usually provided with a special mask, is opaque and is probably not accepted in some occasions requiring face recognition.

6) The purifier with the separated electric air supply assembly and the filter assembly is large in size, not compact in structure, short of modules for digital display, accurate air quantity control and the like, and inconvenient to carry and use.

In common dustproof or antivirus occasions, especially daily epidemic prevention, an air purifier and a positive pressure type electric air purifying respirator thereof which are more portable, lower in manufacturing cost and lower in material consumption cost are needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the above-mentioned not enough of prior art and providing a portable air cleaner and positive pressure formula electronic air purification respirator to and a breathing half face guard.

The air purifier has the advantages of simple and compact structure, low cost, light weight, small volume, convenient operation and convenient carrying.

The electric air purifying respirator consists of the air purifier, a breathing tube and a breathing protective cover.

The breathing half mask is one of the breathing protective covers, has simple structure, low cost, light weight, attractive appearance and comfortable wearing, and can be made of transparent materials to further improve the aesthetic property and the wearing comfort

In one aspect of the present invention, a portable air purifier is provided, which comprises a housing, and a turbine unit, a battery and a control unit accommodated in the housing; the turbine unit comprises a motor and a fan impeller; the shell is provided with an air inlet and an air outlet, the air outlet is arranged on the side surface of the shell, and the air inlet is arranged on the front surface of the shell; the shell comprises a base, an inner cover and an outer cover; a first cavity and a second cavity are arranged between the base and the inner cover; the first cavity accommodates the turbine unit and is provided with an air inlet and an air outlet; the air inlet is formed in the inner cover, and the air outlet is communicated with the air outlet; the second cavity accommodates the battery and the control unit; a third cavity is arranged between the inner cover and the outer cover; the third cavity is accommodated with a filter assembly and communicated with the outer side of the shell through the air inlet; the control unit comprises a control circuit board, a display assembly and a control button; the control circuit board is respectively connected with the motor, the battery and the display assembly; the display component is arranged on the top surface of the shell and can display electric quantity and/or motor rotating speed; the control button can control the starting and stopping of the motor and/or the rotating speed of the motor.

In an embodiment of the present invention, the housing is further provided with a battery compartment and a battery cover adapted to detachably mount the battery.

In one embodiment of the present invention, the battery is a rechargeable battery, preferably a lithium ion battery, and more preferably a cylindrical lithium ion battery;

in one embodiment of the present invention, the filter assembly is a flat filter cotton.

In an embodiment of the present invention, the filter cotton comprises two layers of meltblown, one layer of hot air cotton, and one layer of non-woven fabric.

In one embodiment of the present invention, the display module is one or more combinations of an indicator light, a nixie tube, a liquid crystal display screen and a LED display screen;

in one embodiment of the present invention, the control button is on the top surface or the side surface of the housing;

in an embodiment of the present invention, the control button is one of a mechanical button, a touch button or a knob;

in an embodiment of the present invention, the control button can steplessly adjust the rotation speed of the fan or adjust the rotation speeds of at least three fans with different sizes;

in an embodiment of the present invention, the fan rotation speed is adjusted by a pulse width modulation method;

in one embodiment of the present invention, the motor is a dc brushless motor;

in one embodiment of the present invention, a charging interface is installed on the housing;

in one embodiment of the present invention, the housing is square, the two sides of the front surface of the housing are long and wide, the two sides of the top surface of the housing are wide and high, the length of the housing is not more than 120cm, the width of the housing is not more than 90cm, and the height of the housing is not more than 60 cm;

in one embodiment of the present invention, a protrusion and a groove are formed between the base and the inner lid of the housing;

in one embodiment of the present invention, the inner cover has a wind guiding strip on one side facing the outer cover, and has a raised edge on the periphery; after the filter cotton is installed, air can only pass through the filter cotton from the air inlet of the outer cover, passes through the air inlet on the inner cover and enters the first cavity;

in one embodiment of the present invention, the air outlet is an internal threaded interface;

in an embodiment of the present invention, the push-pull type back sticker is attached to the back surface of the housing. In one embodiment of the present invention, the push-pull type back sticker comprises a front plate which can be flexibly bent and a rear plate with adhesive; one end of the front plate is fixed on the rear plate, and the other end of the front plate can move in the sliding groove on the rear plate.

In another aspect of the present invention, an electric air purifying respirator is provided, which comprises a breathing protective cover, a breathing tube and the air purifier of the present invention; wherein, air cleaner passes through the respiratory tube with the respirator is connected.

In one embodiment of the present invention, the breathing tube is a bellows;

in one embodiment of the present invention, the corrugated tube is made of one or more materials selected from a group consisting of polyolefin elastomer (POE), ethylene vinyl acetate copolymer (EVA), Polyethylene (PE), polyvinyl chloride (PVC), and silicone;

in one embodiment of the present invention, the respiratory protection mask is one of a mask, a half mask, a full mask and a head cover;

in one embodiment of the present invention, the half-mask is a transparent half-mask;

in one embodiment of the present invention, the transparent half-mask comprises a transparent half-mask main body and a mask strap; the transparent half mask body is made of a transparent polymer; the transparent half mask body has one air inlet and two exhalation valves; the exhalation valve comprises a plurality of exhalation holes, a central fixing column, a silicone sheet and a fixing elastic ring.

In one embodiment of the present invention, the transparent polymer is one or a combination of PVC, EVA, polymethyl methacrylate/PMMA, polycarbonate (polycarbonated/PC) and silicone;

in one embodiment of the present invention, the transparent half mask body is made of a transparent elastic polymer;

in one embodiment of the present invention, the transparent half mask body is formed by bonding a transparent rigid mask body and an elastic sealing mask element;

in one embodiment of the present invention, the transparent half mask is provided with a nose bridge pad to enhance the bonding effect between the mask and the nose bridge and to block the air in the mask from flowing to the eyes;

in one embodiment of the present invention, the nose pad is made of one of silicone or sponge;

in one embodiment of the present invention, the mask has two upper and lower parts.

In another aspect of the present invention, there is also provided a respiratory protection mask, a respiratory half mask, a transparent respiratory half mask according to the above description of the embodiments.

Compared with the prior art, the utility model, there are obvious advantage and beneficial effect:

1) the shell of the air purifier and the shell of the fan are integrated, and the shell of the filter box and the shell of the air purifier are also integrated, so that the manufacturing cost is reduced, and the structure is more compact.

2) The flat filter cotton is adopted, so that the use cost is lower, and the replacement and the disinfection are more convenient.

3) The side at the casing is installed to the gas outlet, and there is enough space installation display module and control button casing top surface, has made things convenient for wearer's observation and use.

4) The air purifier top surface installation display module can show electric quantity and/or fan rotational speed, makes things convenient for wearer's regulation and use.

5) The air purifier adopts the design of a detachable battery, and a long-time wearer only needs to replace the battery.

6) The transparent half mask is light in weight, comfortable to wear and convenient for face recognition.

7) The push-pull back sticker on the back can meet different wearing modes.

To illustrate the structural features and advantages of the present invention more clearly, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are not to scale for clarity of illustration, but are not to be construed as limiting the invention in any way as to the scale of the features of the invention. The accompanying drawings are included to provide a further understanding of the various embodiments of the invention and are incorporated in and constitute a part of this specification, but are not intended to limit the invention. Drawings

Fig. 1 is a front perspective view of an air cleaner according to a first embodiment of the present invention;

fig. 2 is a back perspective view of the air cleaner according to the first embodiment of the present invention;

FIG. 3 is a top view of the air cleaner of the first embodiment of the present invention;

fig. 4 is a front view of the air cleaner of the first embodiment of the present invention with the outer cover removed;

fig. 5 is a front view of the air cleaner of the first embodiment of the present invention with the outer cover and the inner cover removed;

fig. 6 is an exploded view of an air cleaner according to a first embodiment of the present invention;

FIG. 7 is a side view of the air cleaner according to the first embodiment of the present invention;

FIG. 8 is a side sectional view of the air cleaner according to the first embodiment of the present invention;

FIG. 9 is a schematic view of a filter according to a first embodiment of the present invention;

fig. 10 is a back perspective view of an air cleaner according to a second embodiment of the present invention;

FIG. 11 is a front perspective view of a third embodiment of the transparent half-mask of the present invention;

FIG. 12 is an exploded view of a third embodiment of the transparent half-mask of the present invention;

FIG. 13 is a schematic view of a powered air purifying respirator of a fourth embodiment of the present invention;

FIG. 14 is a schematic view of a powered air purifying respirator of a fifth embodiment of the present invention;

the attached drawings are as follows:

1.air purifier 2,breathing tube 3, breathing protective cover

10.Casing 100,first cavity 101, second cavity

102.Third cavity 103,front surface 104 of the shell and back surface of the shell

105. Housingtop surface 106, housing leftside surface 107, and housing right side surface

108.Battery compartment 11,base 111, fan lateral wall

1111.Side wall bulge 112, batterycompartment side wall 113 and fixing column

114.Motor fixing shaft 115,motor wire groove 12 and inner cover

121.Air inlet 122,air guide strip 123 and fixing hole

124. Inner cap groove 125,edge projection 13, outer cap

131.Air inlet 14,gas outlet 15, interface that charges

16.Cylindrical hinge 17,buckle 18 and battery compartment cover plate

20.Turbine unit 21,motor 22, and fan impeller

30.Control unit 31, control circuit board 32, display module

321. Nixie tube 33,control button 331, up-regulating/switching key

332. Down/onbutton 333, touchsensitive spring 40, battery

41. Lithium ioncylindrical battery 50,filter assembly 51 and filter cotton

52. Melt-blown fabric layer 53, hotair cotton layer 54, non-woven fabric layer

60. Transparent half mask 61, transparent half maskmain body 62 and mask air inlet

63.Breather valve 631,breather hole 632, central fixed column

633.Silicone sheet 634,elastic fixing ring 64, nose bridge fixing strip

65.Nose bridge pad 66, face mask lacing 67, lacing hole

68.Composite mask 681,rigid mask body 682, elastic sealing mask element

683.Inhalation valve 684, facemask breather valve 685, face mask tether hole

70. Push-pull type backsticker 71,front plate 72 and rear plate

73.Chute 74 and rope hanging hole

Detailed Description

Term(s) for

As used herein, the term "back of the housing" refers to the side of the housing that is placed against the wearer's body when worn.

As used herein, the term "front of the housing" refers to the side of the housing opposite the back, facing outward from the body when worn.

As used herein, the term "top surface of the housing" refers to the side of the housing that faces the head of the wearer when worn.

As used herein, the term "left side of the housing" refers to the side of the housing on which the viewer faces the front of the housing, the top of the housing faces upward, and the left side of the housing and viewer is the same side.

As used herein, the term "housing right side" refers to the right side of the housing relative to the left side.

As used herein, the term "housing side" refers to either the housing left side or the housing right side.

As used herein, the term "full face mask" refers to a mask that protects the entire face of a person, including the mouth, nose and eyes.

As used herein, the term "half-mask" refers to a mask that protects only the nose and mouth of a person.

The present invention will be further explained with reference to specific examples, which are not intended to limit the present invention in any way.

The utility model discloses a first embodiment provides a portable air purifier. Fig. 1 to 8 show a specific structure of a first embodiment of the present invention. As shown in the drawing, the air cleaner includes ahousing 10, and aturbo unit 20, acontrol unit 30, and abattery 40 accommodated in the housing; theturbine unit 20 includes amotor 21 and afan wheel 22; the housing is provided with anair inlet 131 and anair outlet 14. The structure of the air cleaner will be described in detail with reference to fig. 1 to 8.

As shown in fig. 1, theair outlet 14 is open at the housing leftside 106 and theair inlet 131 is open at thehousing front 103. Fig. 6 is an exploded view of an air cleaner according to a first embodiment of the present invention. As shown in fig. 6, thehousing 10 includes abase 11, aninner lid 12, and anouter lid 13. Fig. 4 is a front view of the air cleaner according to the first embodiment of the present invention except other portions of theouter cover 13, and fig. 5 is a front view of the air cleaner according to the first embodiment of the present invention except other portions of theouter cover 13 and theinner cover 12. As can be seen from fig. 4, 5 and 6, thebase 11 is a frame-shaped cavity, and afirst cavity 100 and asecond cavity 101 are arranged between the base 11 and theinner cover 12; thefirst cavity 100 accommodates theturbine unit 20 and is provided with anair inlet 121 and anair outlet 14, wherein theair inlet 121 is formed on theinner cover 12; thesecond chamber 101 accommodates thebattery 40 and thecontrol unit 30.

Fig. 8 is a side sectional view of the air cleaner according to the first embodiment of the present invention. As shown in fig. 6 and 8, thebase 11 has amotor fixing shaft 114, themotor 21 is mounted on the fixingshaft 114, and thefan impeller 22 is mounted on themotor 21 through a rotating shaft. Themotor 21 of the present embodiment is a dc brushless motor. The base 11 further has anannular blower sidewall 111 separating thefirst chamber 100 and thesecond chamber 101. Thebase 11, theinner cover 12, themotor 21 and thefan wheel 22 form a turbo fan, and thebase 11 and theinner cover 12 form a housing of the turbo fan. The design reduces the manufacturing cost of the fan and the weight of the purifier. Themotor 21 is connected with thecontrol unit 30 through a wire, themotor wire groove 115 is formed in thebase 11, and a motor wire penetrates through thewire base groove 115 to be connected with the control unit, so that the wire is prevented from touching thefan impeller 22.

As shown in fig. 4, theinner lid 12 is provided with four fixingholes 123; as shown in fig. 5, four fixingposts 113 are provided on thebase 11, and theinner lid 12 can be fixed to thebase 11 by screws. As shown in fig. 5 and 7, theside wall 111 of the fan is provided with aside wall protrusion 1111, and the corresponding part of theinner cover 12 is provided with aninner cover groove 124, which is beneficial to enhancing the air tightness of the fan after packaging. A sealant is coated in thegroove 124 to further contribute to enhancing airtightness.

Theblower side wall 111, the batterycompartment side wall 112, the fixingcolumn 113, themotor fixing shaft 114 and themotor line slot 115 on thebase 11 are formed by integral injection molding with thebase 11.

The rated voltage of themotor 21 is selected to be 3V to 24V, preferably 5V to 12V. The rated power of the motor is selected to be 0.5W-5W, preferably 1W-4W. The size of thefan impeller 22 needs to be checked, the large size can affect carrying, the small size can affect fan efficiency, and the diameter of the fan impeller is usually 30-100 mm, preferably 40-80 mm. The rotating speed of themotor 21 is 2000-8000 rpm, preferably 3000-6000 rpm.

Thecontrol unit 30 includes acontrol circuit board 31, a display assembly 32, and control buttons 33; thecontrol circuit board 31 is respectively connected with themotor 21, thebattery 40 and the display assembly 32; the display component 32 is arranged on thetop surface 105 of the shell and can display the electric quantity and/or the rotating speed of the motor; the control buttons 33 may control the start and stop of the motor and/or the motor speed.

Thecontrol Circuit Board 31 is a Printed Circuit Board (PCB), and is mounted on the upper portion of thesecond cavity 101 of thebase 11. Thecontrol circuit board 31 includes: the device comprises a central controller, a fan control module, a display control module, a power supply control circuit, a charging control circuit, a switch control circuit and the like. The power supply control circuit is used for controlling power supply to each power utilization module of the air purifier, and the charging control circuit is used for controlling charging to thebattery 40. As shown in fig. 2, thecontrol circuit board 31 of the present embodiment is mounted with a charginginterface 15, and the charginginterface 15 is a micro-USB interface that is opened above theright side surface 107 of the housing.

As shown in fig. 3, the display assembly 32 is disposed in the center of thehousing top surface 105. In this embodiment, a nixie tube (188 with a dial indicator nixie tube is selected) 321 is installed on thecontrol circuit board 31. The nixie tube can display three digits, the first digit can only display 1 or not, the second digit and the third digit can display 0-9, and the right side of the three digits can display percent.Nixie tube 321 can display both the power and the relative wind speed or wind volume. When the electric quantity is displayed, "%" is bright, and the display range is from "0%" to "100%".

As shown in fig. 3, the control button 33 is disposed on thetop surface 105 of the housing and connected to thecontrol circuit board 31 for controlling the start/stop and/or the rotational speed of thefan 20. The embodiment adopts a touch key. The top surface of the casing is provided with two touch keys, one is an up/switch key 331 and the other is a down/switch key 332, which are distributed at two sides of thenixie tube 321, and a touch sensing spring 335 is arranged between thetop surface 105 of the casing and thecontrol circuit board 31 for sensing a touch signal. Up/switch button 331 two functions: the display of the electric quantity or the wind speed of the nixie tube is switched by pressing for more than 3 seconds for a long time, and the display of the wind speed or the wind speed is increased by pressing for a short time. The down/onbutton 332 also has two functions: firstly, the fan is started and stopped by pressing for more than 3 seconds, and secondly, the wind speed or the wind quantity is reduced by pressing for a short time.

The speed regulation of the fan generally has two modes, one is to change the input voltage of the fan, and the other is to adopt Pulse Width Modulation (PWM/Pulse Width Modulation), and the PWM speed regulation is to regulate the Pulse Width of the input voltage of the fan through a control circuit, that is, to regulate the Duty Ratio (Duty Ratio) to control the rotation speed of the fan. Duty cycle refers to the proportion of high voltage output time relative to total time in a pulse cycle. In the embodiment, the speed regulation is realized by adopting the PWM, four wires are arranged between themotor 21 and thecontrol circuit board 31, two wires are power input wires, one wire is a wind speed test wire, and the other wire is a PWM signal wire. In this embodiment, the wind speed is set to 10 gears, and the gears are respectively corresponding to duty ratios between 35% and 100% from small to large.Nixie tubes 321 display relative wind speeds, i.e., wind speed steps from "1" to "10".

In order to ensure that the air cleaner can operate for more than 4 hours, therechargeable battery 40 is a large-capacity lithium ion battery. The battery of this embodiment is a 18650lithium ion battery 41 with a capacity of 2500mAh or more. To meet the longer usage requirements, the present embodiment employs a detachable battery design. Thebase 11 is provided with abattery compartment sidewall 112 for separating thebattery compartment 108 from the secondinner cavity 101, and abattery compartment cover 18 for facilitating the user to replace the battery.

During battery charging, a dc power supply, preferably 5V, is connected to the charginginterface 15. The external power supply charges thebattery 40 through thecontrol circuit board 31, thecontrol circuit board 31 controls and manages the charging process, and the charging process and full charging can be prompted to the user through the display assembly 32. In the embodiment, when charging, the dial indicator on thenixie tube 321 flickers to prompt that charging is in progress and display actual electric quantity; when thebattery 40 is fully charged, thenixie tube 321 displays "100%". When the up/switch button 331 is touched for more than three seconds, thecontrol circuit board 31 detects the voltage of the battery, obtains the corresponding relative capacity according to the corresponding curve of the voltage and the capacity of the lithium ion battery, and displays the corresponding relative capacity by thenixie tube 321. Thecontrol circuit board 31 is provided with a buzzer, and when the electric quantity is lower than 20%, the buzzer gives an alarm to remind a user of charging in time.

As shown in fig. 6 and 8, athird cavity 102 is provided between theinner lid 12 and thelid 13; thethird chamber 102 houses thefilter assembly 50 and is provided with anair inlet 131, theair inlet 131 being on theouter cover 13. As shown in fig. 1, theair inlet 131 of the purifier is opened on thefront surface 103 of the housing, and the design of the louver is adopted, so that the wind resistance can be reduced, and the frequency of splashing of the spray onto theinner filtering component 50 can be reduced. Theinner cap 12 and theouter cap 13 are connected by acylindrical hinge 16 to facilitate opening and closing. Theinner cover 12 is provided with air guide strips 122 distributed in a scattering manner on the side facing the outer cover to support thefilter assembly 50. Thefilter assembly 50 in this embodiment adoptsfilter cotton 51, which is N95/KN95 grade filter cotton and above, and has a filtering effect of 95% or even 99% on non-oily particles and microorganisms above 0.3 micron, and can also be used for filtering various viruses (such as coronavirus of 0.1 micron) below 0.3 micron. Fig. 9 is a structural view of thefilter 51, and fig. 9 shows theflat type filter 51 on the left and the structure on the right; thefilter cotton 51 is formed by bonding two melt-blown fabric layers 52, a hot air cotton layer 53 and anon-woven fabric layer 54 by edge hot pressing. Thefilter cotton 51 is put into the third chamber, theouter cover 13 is covered, and theouter cover 13 and theinner cover 12 are fastened by the snap 17 (shown in fig. 2). The edge protrusion 125 of the inner cover can press the edge of thefilter cloth 51. Thus, an air circulation passage shown as follows is formed in the housing of the air cleaner: air can only enter thethird chamber 102 through theair inlet 131, is filtered by thefilter cotton 51, passes through theair inlet 131, is pressurized by the fan, and is discharged from theair outlet 14.

Above this kind of overall arrangement, each subassembly post assembling compact structure in the air cleaner, the space utilization is reasonable to can make the air cleaner more miniaturized (the product casing size 35mm x 73mm x 100mm of this embodiment, weight 135g), portable more.

Thefilter element 50 may be selected from a variety of filter materials known to those skilled in the art, such as filter cotton, filter paper and/or activated carbon; the air filtering effect is mainly determined by the filtering material, and users can select different types and filtering grades of filtering materials according to actual needs. The utility model discloses an air purifier not only can regard as the air purification part use of electronic air purification respirator, can also regard as portable air purifier to use in occasions such as bedroom, office, car.

In order to satisfy different wearing manners of users in different occasions, a push-pull type backsticker 70 as shown in fig. 10 is pasted on theback surface 104 of the shell of the air purifier of the first embodiment, namely, the second embodiment of the present invention. Push-pullsticky back 70 consists of two plates: afront plate 71 which is flexible and bendable and arear plate 72 with adhesive; thefront plate 71 is made of a flexible polymer material, and has one end fixed to therear plate 72 and the other end movable in aslide groove 73 provided in therear plate 72. When the belt, the arm belt or the hanging rope is used, thefront plate 71 of the push-pull type backsticker 70 is pulled up, the belt, the arm belt or the hanging rope penetrates through a gap between thefront plate 71 and therear plate 72, and then thefront plate 71 is straightened to be fixed. The push-pull type backing 70 is also provided with a hangingrope hole 74, and a hanging rope can be used.

Fig. 11 and 12 are a front perspective view and an exploded view, respectively, of a transparent half mask in accordance with a third embodiment of the present invention. The transparent half mask 60 comprises a transparent half mask main body 61 and amask strap 66; the transparent half mask body 61 is made of a transparent polymer; the transparent polymer is one or more of polymethyl methacrylate (PMMA), PVC, EVA and silicone resin. The transparent half mask body may be made of either an elastic transparent polymer or a transparent rigid mask body bonded to an elastic sealing mask element. In this embodiment, the transparent half mask body 61 is made of flexible PVC or EVA, having onemask air inlet 62 and twobreather valves 63; theexhalation valve 63 includes a plurality ofexhalation ports 631, a central fixingpost 632, asilicone sheet 633 and anelastic fixing ring 634. Each breather valve in this embodiment has 6 breathing holes. The diameter of the lower end of thecentral fixing column 632 is smaller than that of the upper end, and the diameters of the central holes of thesilica gel sheet 633 and theelastic fixing ring 634 are smaller than that of the upper end of thecentral fixing column 632, so that the central fixing column can be prevented from sliding off. When the internal pressure of the transparent mask body 61 is less than the ambient pressure, thesilicone sheet 633 closes the exhalation valve against theexhalation vent 631, preventing the user from inhaling directly ambient unfiltered air.

The front face of the upper part of the transparent half mask can be provided with a nosebridge fixing strip 64 for keeping the shape of the mask close to the nose bridge; the upper back of the transparent half mask may be provided with a nose pad 65, the nose pad 65 being made of a resilient polymer, such as sponge or silicone, to enhance the fit between the mask and the nose bridge. When positive pressure air is introduced, air in the mask can be blocked from flowing to eyes. The transparent half-mask 60 may be provided with upper andlower straps 66, and the transparent half-mask body 61 may have fourstrap holes 67 for receiving thestraps 66.

The transparent half mask is light in weight, the transparent half mask body 61 is only 26g, the weight of the transparent half mask is about half of that of a conventional half mask, and a double-strap design is added, so that a wearer can feel comfortable. And the transparent material is very suitable for occasions needing to identify human faces, such as airport security inspection.

Fig. 13 shows a powered air purifying respirator according to a fourth embodiment of the present invention, which includes anair purifier 1, abreathing tube 2, and a breathingprotective cover 3. The breathingprotective cover 3 is connected with theair purifier 1 through thebreathing tube 2. Therespiratory protection mask 3 can be a mask, a half mask, a full mask or a head cover, and the embodiment adopts a transparent half mask 60. Thebreathing pipe 2 is a corrugated pipe and can be made of one or more materials of POE, EVA, PE, PVC and silicone resin. After theair purifier 1 is started, air is filtered and purified by thefilter assembly 50, enters thefirst cavity 100, is pressurized by theturbine unit 20, and then is conveyed to the breathingprotective cover 3 through thebreathing tube 2.

Fig. 14 is a schematic view of a powered air purifying respirator of a fifth embodiment of the present invention, therespirator hood 3 employing acomposite facepiece 68. Thecomposite face mask 68 is formed by bonding arigid mask body 681 to an elasticsealing mask element 682. Therigid mask body 681 is made of one or more materials selected from the group consisting of polyamide, polyphenylene ether, polycarbonate, polybutylene terephthalate, polyphthalamide, and polymethyl methacrylate. The resilient sealingface shield component 682 is made of one or more materials selected from rubber, thermoplastic elastomers, and silicone. As shown in fig. 14, therigid mask body 681 is provided with anair inlet 683, amask breather valve 684, and mask tether strap holes 685, which are omitted from fig. 14.

It can be seen from the above embodiments that the utility model provides an electric blower can be connected with the filter of multiple different shapes and different ranks and use, can also use with the breathing protection casing cooperation of different styles. The above embodiments only describe the implementation mode of the present invention with better effect, but not limit the technical scope of the present invention, so all the details, changes and modifications made by the essence of the present invention to the above embodiments are all still within the protection scope of the present invention.

Claims (10)

1. An air purifier is characterized by comprising a shell, a turbine unit, a battery and a control unit, wherein the turbine unit, the battery and the control unit are accommodated in the shell; the turbine unit comprises a motor and a fan impeller; the shell is provided with an air inlet and an air outlet, the air outlet is arranged on the side surface of the shell, and the air inlet is arranged on the front surface of the shell; the shell comprises a base, an inner cover and an outer cover; a first cavity and a second cavity are arranged between the base and the inner cover; the first cavity accommodates the turbine unit and is provided with an air inlet and an air outlet; the air inlet is formed in the inner cover, and the air outlet is communicated with the air outlet; the second cavity accommodates the battery and the control unit; a third cavity is arranged between the inner cover and the outer cover; the third cavity is accommodated with a filter assembly and communicated with the outer side of the shell through the air inlet; the control unit comprises a control circuit board, a display assembly and a control button; the control circuit board is respectively connected with the motor, the battery and the display assembly; the display component is arranged on the top surface of the shell and can display electric quantity and/or motor rotating speed; the control button can control the starting and stopping of the motor and/or the rotating speed of the motor.

2. The air cleaner of claim 1, wherein the housing further includes a battery compartment and a battery cover adapted to removably receive a battery.

3. The air cleaner of claim 1, wherein the filter assembly is a flat filter cotton.

4. The air purifier of claim 1, wherein the back of the housing is attached with a push-pull type back sticker, the push-pull type back sticker comprising a front plate which is flexible and bendable and a back plate with adhesive; one end of the front plate is fixed on the rear plate, and the other end of the front plate can move in the sliding groove on the rear plate.

5. The air purifier of claim 1, wherein the display component is one or a combination of a digital tube, a liquid crystal display screen or an LED display screen.

6. The air cleaner of claim 1, wherein the battery is a lithium ion battery.

7. A powered air purifying respirator, characterized by comprising a breathing protective mask, a breathing tube and an air purifier according to any one of claims 1-6; wherein, air cleaner passes through the respiratory tube with the respirator is connected.

8. The powered air purifying respirator of claim 7, wherein the respiratory mask is a respiratory half mask; the respiratory half-mask comprises a mask body and a mask strap; the mask main body is provided with an air inlet and an exhalation valve; the exhalation valve comprises a plurality of exhalation holes, a central fixing column, a silicone sheet and an elastic fixing ring.

9. The powered air purifying respirator of claim 8, wherein the breathing half mask is made of a transparent polymeric material that is one or more of polyvinyl chloride, ethylene vinyl acetate, and silicone.

10. The powered air purifying respirator of claim 8, wherein the breathing half-mask further comprises a nose bridge cushion.

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