US2730873A - Room air conditioners - Google Patents

Description

Jan. 17, 1956 H. w. HARDIN ETAL 2,730,873

ROOM AIR CONDITIONERS Filed May 19, 1955 6 Sheets-Sheet 1 IN VEN TORS HUB ER? W'- HJBRDIN LIN N R NB 'ETER BY FIGB' WMM J STT R EY Jan. 17, 1956 H. w. HARDIN ETAL ROOM AIRCONDITIONERS 6 $heets-Sheet 2 Filed May 19, 1955 Q s m m T s N w x mm mww, W l 0 AR T %w JB T W A @W mm E Y win... flu M H Pm @m N mvHGm PH Jan. 17, 1956 H. w. HARDIN ET AL ROOMAIR CONDITIONERS 6 Sheets-Sheet 3 Filed May 19, 1953 Q Q Q Q Q Q W Q Q U Q @m Q Q Q rm Q Q Q v Q DH mg Om N19 wmm @m BERT WIHARDIN CLINTON QBRINKOETER IN V EN TORS ATTORNEYS mi ON Jan. 17, 1956 H. w. HARDIN ETAL ROOM AIR CONDITIONERS INVENTORS HUBERT w. HARDIN 6 Sheets-Sheet 4 ,Q CLINTDNQBRINKOETER ATTORNEYS gzwwwu 1 I I I I I I I I Tmv Ham 0m ma Filed May 19, 1953 7, 1956 H. w. HARDIN ET AL 2,730,873

ROOM AIR CONDITIONERS Filed May 19, 1953 6 Sheets-Sheet 5 INVENTORS HUBEERT W. HAR

IN LIIEEON c. BRINHOETER WNW 93TTORNEY6 Jan. 17, 1956 H. w. HARDIN ETAL 2,730,873

ROOM AIR CONDITIONERS Filed May 19, 1953 6 Sheets-Sheet 66O 61 14:7 FI

PI G. 6.

RT R INVENTORS BE HB DIN LIN i QN R NB ETER ETTORNEYS United States Patent ROOM AIR CONDITIONERS Hubert W. Hardin and Clinton C. Brinkoeter, San Antonio, Tex., assignors to- Ed Friedrich, Incorporated, San Antonio, Tex a corporationof Texas Application May 19, 1953, SerialNo. 355,928

14 Claims. (Cl. 62-429) This invention relates to an improvement in room air conditioners, and moreparticularly to the type which is supported in a window or opening of a building.

An object of the invention is to conduct the room air, fresh air, or a combination of room air and fresh air through the conditioning unit so that the air is drawn into, the conditioning unit by a turbine and through a filter, an evaporator and into the turbine, and then elevated to a cooling chamber for distribution to a room.

A further object is to provide means for controlling and directing the distribution of air to the room from the cooling chamber.

Another object is to control the admission of room air and fresh air to the conditioning unit.

Another object is in disposing of any condensate from the evaporator.

Another object is in supporting as a unit the filter, evaporator and turbine injthe conditioning unit.

The invention consists of other features of construction and combinations of parts which will be described. in the specification and claims.

in the accompanying drawings:

Figure l is a perspective view of the room air conditioner;

Figure 2 is a horizontal sectional view of the invention;

Figure 3 is a vertical longitudinal sectional view taken on line 3-3 of Figure 2;

Figure 4 is a transverse vertical sectional view taken on line 4-4 of Figure 2;

Figure 5 is a detail longitudinal vertical sectional view taken on line 5-5 of Figure 1;

Figure 6 is a perspective view of the evaporator tur bine housing;

Figure 7 is a vertical cross sectional view taken on line 7--7 of Figure 3;

Figure 8 is a transverse vertical sectional view taken on line s s of Figure 3.

The air conditioner casing comprises abottom wall 10 which extends substantially the full length of the casing and is provided withupstanding flanges 11, along the sides and ends thereof.Side Walls 12 are attached to the flanges byscrews 13, and are provided with inturned.

flanges 14 at their upper edges. Anopen end wall 17 is mounted on thebottom wall 10 between theside walls 12, and is provided with an inturned flange 18 at its upper edge. A cover 29 is mounted on the inturnedflanges 14 of theside walls 12 and flanges 18 of the end wall 17', and secured thereto byscrews 22. Arubber gasket 23 is interposed between thecover 20 andflanges 14 and to form a sound deadening seal. Aflange 26 on the cover 29 overlaps the upper edge of theend wall 17. The inner end of the cover is provided with anupstanding flange 27 which engages the inner side of a window sash 28.

Thesides 12 are each provided withseveral rowsof louvers 30 for the admission of fresh air to. the conditioner casing. Thesides 12 extend nearlythe full length 2,730,373 Patented Jan. 17, 1956- of the bottom. 10: and their inner ends are attached to theend panels 46 byscrews 35 and to theflange 11 of thebottom 10 bybolts 40 and 41, see Figure 7. Each of theend panels 46 are provided with openings with hingedcover 106 so that access may be had to the evaporator 34 and associated parts.

Acondenser 32 is located at the outer end of the bottom wall iii and adjacent the openouter end wall 17, and an evaporator 34 is located at the inner end of the bottom wall. A compressor 36 is mounted on thebottom wall 10 between the evaporator and condenser and is supported above the bottom wall by a suitable base member 37. An electric motor 38. is mounted on the bottom.

wall and supported thereabove by a base member 39 and arranged in a diagonal direction with respect to the compressor 36. Thearmature shaft 40 of the motor has a turbine orimpeller 42 mounted thereon at one end for circulating air through the evaporator 34 and afan 44 is mounted on the other end of the armature shaft for directing air through thecondenser 32 and to atmosphere.

A channel shaped beam orbrace 45 extends transversely of the bottom wall about midway of its length and the ends of the beam abut theupstanding flange 11 along the two side edges of the bottom wall.

The evaporator 34 and turbine orimpeller 42 are dis posed in a housing consisting of twoend panels 46 whichv are supported by the bottom wall 16' and adjacent. its.

inner end within the portion thereof located in the room to be conditioned. Thesepanels 46 support a cold air deck, 48. at their upper ends, which projects forwardly of. the panels to provide anoverhanging portion 49. Disposed between thepanels 46 and below thecold air deck 48 andabove the bottom wall lil is ashelf 50 upon which the evaporator 34 is mounted. Aback wall 52 is connected to the rear ends of the panels and to the rear edges of thecold air deck 48 andshelf 50 to provide an evaporator chamber or compartment. This back wall is provided with a truncated or flared opening 53 to establish communication with theturbine 42 in a turbine or impeller cage attached to the back wall. The, turbine cage has a curved or arcuateshaped wall 55 to encompass theturbine 42. and is connected along one edge thereof to theback wall 52. Aside wall 56 is attached to the opposite edge of thecurved wall 55 and through which the armature shaft 44) extends. Thecurved wall 55 andside Wall 56 of the turbine cage are located above thebottom wall 10 of the conditioner casing unit. Oneend 57 of thecurved Wall 55 is connected to thecold air deck 48 while itsopposite end 58 projects above the cold air deck, and is disposed adjacent one of theside walls 12 of the conditioning unit casing. Theside wall 56 of the turbine cage extends above thecold air deck 48 and is connected to the upwardly projectingend 58 of thecurved wall 55. The upper edges of the side andcurved walls 56, 55, are in substantial alignment with the upper edges of theside walls 12 of thecasing unit.

Anupright partition 60 is mounted on thecold air deck 48 adjacent the rear longitudinal edge of the, cold air deck and extends a short distance from one end of the cold air deck at right angles to one of theend panels 46 and a:side wall 12 and then extends diagonally rearwardly across the cold air deck and is joined, to an end of theside wall 56 of the turbine or impeller cage, which is disposed at an angle to theopposite side wall 12. Thispartition 60 and the upper portions of the walls of the turbine cage provide a bulkhead lengthwise of thecold air deck 48 and transversely of the conditioner casing to direct the conditioned air issuing radially and. laterally from the turbine orimpeller 42 toward. the front of and throughout the length of the cold airdeck. Extending across theturbine 42 and mounted 3 upon a portion of the bulkhead partition and theside wall 56 of the turbine cage and an end of the curved wall of the turbine cage is an insulated member or plat .form 62 which insures the air being directed laterally from theturbine 42 and forwardly therefrom against the diagonal portion of the bulkhead.

Thepartition 60, is provided with an inwardly directedflange 61, andsimilar flanges 59 are provided at the upper edges of thewalls 55 and 56. The platform-62 is secured to theflanges 59 and 61 byscrews 64. The portion of theback wall 52 which forms a wall of the turbine cage, is provided an outwardly extending curved lip orflange 51 which overlies thecold air deck 48.

The conditioned air issues from the turbine or impeller cage over thelip 51 andend portion 57 of thewall 55 thereof, onto thedeck 48 radially and laterally and against the diagonal portion of the partition. The opening of the turbine cage is arranged adjacent and laterally of one end of thedeck 48, and with the partition arranged in a somewhat zig zag path lengthwise of the deck, and with respect to the opening of the turbine cage a more even distribution of the conditioned air transversely of thedeck 48 is obtained for delivery to the room to be conditioned.

Thecold air deck 48 is covered with asuitable insulation 63 and theshelf 50 and theback wall 52 as well as the curved andside walls 55 and 56 of the turbine cage are all covered on their exterior surfaces withinsulation 63 for sound deadening purposes. The lip orflange 51 is disposed over theinsulation 63. It will be noted that theshelf 50 which supports the evaporator 34 is disposed above thebottom wall 11 and thereby affords apassage 65 therebeneath which provides a communication throughout the width of the air conditioning unit with the compartment containing the compressor condenser unit. Hinged to the outer surface of the bottom wall is a damper 66 which extends transversely of the bottom wall and is adapted to engage the front edge of theshelf 50 for controlling the supply of fresh air through thepassage 65 beneath theshelf 50 carrying the evaporator. Suitable packing 67 is provided along the upper face of the damper 66 which engages the front wall of theshelf 50 to form a seal therebetween. The damper is capable of being swung on itshorizontal axis 68 by a knob 70 for opening and closing thispassage 65 to suit the operator. A link 71 is pivoted to the inner face of the damper 66 and is provided with an elongated slot 72 for the reception of astud 73 carried by abracket 74 to control or hold the damper in its adjusted positions.

Ascreen 75 is disposed between theshelf 50, or

bottom of evaporator housing and inner surface ofbottom wall 10, and extends transversely of thebottom wall 11 and in vertical alignment withback wall 52, to eliminate any foreign matter from flowing through thepassageway 65.

Attached to eachend panel 46 and eachend plate 76 of evaporator 34 byscrews 77 is aplate 78. Theseplates 78 extend from the lower side of thecold air deck 48 to and overlie theupturned flange 54 of theshelf 50, Figures 3 and 6. Mounted on eachplate 78 is achannel member 80, so arranged that thechannels 81 thereof are disposed toward each other. Thechannels 81 are each tapered with the larger opening of the channel being at the lower end thereof at theshelf 50. Each channel member is provided with aledge 82 which extends in the plane of theshelf 50 and partially closes the lower end of thechannel 81. Afilter 84 of any suitable material such as fiber glass, is inserted into the channel member from the bottom or lower ends of the channels and then the lower portion is moved inwardly toward the evaporator until it rests on theledges 82 whereby the filter is supported in position in front of the evaporator.

The evaporator 34 employed in the unit consists of a series of vertically arranged coils oftubing 86, preferably two rows, which are supported byend plates 76,

and thetubes 86 are provided with a plurality offins 87 consisting of thin plates. Thesefin plates 87 are provided with two rows of openings for the reception of the rows of tubing. The vaporized refrigerant is conducted from the evaporator by tubing 88 to atank 89 and from which the refrigerant is delivered to the compressor 36. The compressed refrigerant is conducted from the compressor bytubing 91 to acondenser 32 located in the conditioning unit casing at the opposite end thereof from the evaporator, and at the open end of the conditioner casing. The refrigerant after being cooled is conducted bytubing 92 to the evaporator.

Theshelf 50 is constructed to collect any condensate from the evaporator 34 and'leading therefrom aredrain pipes 93 which deliver the condensate onto thebottom wall 10 where it is conducted byembossed grooves 94 or troughs formed in the bottom wall to asump 95 formed in the bottom wall in rear of the condenser. Thecondenser fan 44 is mounted on thearmature shaft 40 of the electric motor 38 for directing air through thecondenser 32 and through the opening in conditioner casing to atmosphere. The condenser'is constructed somewhat similarly to the evaporator consisting of tubing 96,fins 97, end plates 98. A shroud is formed in the shape of a vertical channel, with the center thereof provided with anopening 103 for the reception of thefan 44. The sides of the shroud or channel are arranged to diverge from the central portion oropening 103 at different acute angles and are connected to the end plates 98 of the condenser. Theshroud 100 extends inwardly from thecondenser 32, and is disposed between the bottomwall 10 andcover 20 and is preferably welded to bottom 10 in rear ofsump 95. Arubber gasket 101 is secured to the upper edge of the shroud and is engaged by the under surface of thecover 20 to provide a sealedchamber 102 between the shroud and condenser, and also seals thechamber 102 from the motor 38 and compressor 36, except for theopening 103 in the shroud for the reception of thefan 44. Aslinger ring 104 is attached to thefan 44 and is located within thechamber 102. Theslinger ring 104 dips into thesump 95, so that as the fan is rotated the condensate in the sump is picked up and thrown into the air stream from the fan and against the condenser for disposing of the condensate and cooling the condenser. The shroud prevents any of the moisture or condensate agitated by the fan from contacting the motor or compressor.

The inner or room end of the air conditioning unit is provided with a hood comprising afront wall 108, atop wall 109 and endwalls 110, which envelopes or encloses thecool air deck 48, evaporator 34, and a portion of theturbine 42. Thetop wall 109 is provided with anupstanding flange 111 which abuts theflange 27 of thecover 20 of the conditioning unit. The inner surface of thewalls 108, 109, are provided withsuitable insulation 112, and thetop wall 109 and its insulation rests on theflanges 59, 61 of thebulkhead partition 60 and thegasket 23 of the sides 12-to provide a tight fit and at the same time to deaden any sound due to the operation of the apparatus and flow of air. Theend walls 110 overlap and are connected to thesides 12 byscrews 113 for securing the hood in place. Thefront wall 108 is arranged in spaced relation to the evaporator compartment andfilter 84, and a room air intake opening 115 is provided between the lower end of the front wall and the inner end of thebottom wall 10 for the admission of room air to the filter and evaporator under the influence of theturbine 42. Access to the damper knob 70 is had through the opening 115 for operating the damper 66, so that fresh air frompassage 65 may commingle with room air issuing through. opening 115 before the room air and fresh air are delivered to thefilter 84 and evaporator 34. The damper 66 may be operated to close the intake opening 115, and thepassage 65 will then be fully in open position for supplying fresh air to the receivingchamber 116 provided by the hood. The receiving chamber is closed at the top by the overhanging-portion 49 of thecold air deck 48, which. snugly engages thefront wall 108 of the hood.

The hood isprovided: with a. transverse air outlet opening 118 at the upper peripheral edge thereof, where thefront wall 108 andtop wall 109, would join, and the edges of the front and top wall along theopening 118. are inwardly bent to provideflanges 119 and 120, respectively. Theopening 118 affords an outlet for the cold air above thecold air deck 48 and cold air chamber.

The end walls of the hood extend rearwardly along theside walls 12, and as theback wall 52 is located between thesides 12, the conditioner unit is provided with an evaporator compartment at its inner end. Thedeck 48 andpartition 61 thereon are located between theend walls 110 andsides 12, and thetop wall 109 of the hood rests on the partition 69 providing the cold air chamber between the deck and top wall.

Located within theopening 118, Figures 3, 5, and 8. are a plurality of e. g., twenty-four, vertical louvers I22 and threehorizontal louvers 123 disposed beneath the vertical louvers to give maximum air flow in any and all directions. Thevertical louvers 122 are arranged in spaced relation and pivoted at their ends between twoparallel rails 124, 124. An edge of eachrail 124 is flanged at 125, and one of theflanged edges 125 is received beneath theflange 119 offront wall 108, and theflanged edge 125 of theother rail 124 is received beneath theflange 120 oftop wall 109. Therails 124 are connected at their ends to endplates 126 which are provided withflanges 127 spot welded or riveted to therails 124, as indicated at 128, in Figure 8. Theend plates 126 are supported byend walls 110 onbrackets 129 welded to theend walls 110. Thebrackets 129 are provided with laterally extendinglips 130 to which theend plates 126 are attached byscrews 131. Mounted on and between theend plates 126 are threehorizontal louvers 123 arranged in spaced relation to each other and in alinement, so that they may be arranged in overlapping relation. Thelouvers 123 are provided at their ends withtrunnions 132 which extend through theend plates 126, and mounted on thesetrunnions 132 on each side of the end plates 1.26 areresilient friction disks 133 to retain thelouvers 123 in their adjusted position. The lower edge of eachlouver 123 is provided with anorifice 134 for the reception of a notchedbar 135.Notchedbars 135 are connected to theintermediate louver 123 and to eachouter louver 123, so that the threelouvers 123 will move in unison when operated by the handle or lever 136 connected to the intermediate louver 123'. Aspring 137 is connected to theoutermost louvers 123 to insure their cojoint operation. Thelouvers 122 are similarly constructed with trunnions and friction disks in mounting them to therails 124, and it is considered that the showing in Figure 8, will sutfice to show that the louvers122 are supported in a like manner to the showing forthelouvers 123.

'Anopening 139, Figure 5, is formed in the hood top wall109, adjacent one end thereof, which provides communication with the room to be conditioned and the compartment of the air conditioner casing having the motorcompressor-condenser, so that stale air may be drawn from the room by the condenser fan 4d and discharged to atmosphere.Thisopening 139 is located rearwardly beyond thepartition 60, and is provided with a screen orfilter 140. A hingedlid 141 is connected to thetop wall 109 and may be held in a closed or open position by a slottedplate 142 connected to the cover. Abolt 143 is connected to thetop wall 109 which extends through the slotted plate, and aspring 144 on the bolt exerts a pressure on theplate 142 for holding thelid 141 in its varied positions of adjustment.

Aswitch 145 for controlling the operation of the compressor 36, and motor 38, is disposed on thedeck 48, in the rear of thepartition 60, and aguard plate 146. connected to the rear wall of the partition encompasses three sides of the switch.Ashaft 147 of the switch extends t3 vertically through the top wall 1091112 the hood, and is provided with aknob 148, which may be rotated to three positions, for causing either the operation of the refrigerating system and fans; to operate only the fans; to an off position which would cut off any source of current or power to the fans and cooling system. An overflow standpipe 149 is formed in the bottom 10 in the motorcompressor compartment to drain off. any excess condensate or Water that may be collected inthe compartment, and primarily from a storm where a driving rain might pass through the-louvers 31) of thesides 12.

Figures 3 and 4 illustrate a method of supporting the conditioning unit in a window, with a rectangular cradle frame, having one end rail 150 secured to thewindow sill 151 byscrews 152. Extending lengthwise of the sill is across bar 153 to whichbrackets 154 are removably attached and which are connected to eachside rail 155 of the cradle frame. Cradle slides or angle guide rails 1.56 on which the bottom 10 of the conditioner unit is mounted, are supported in spaced relation to the side rails 155 byrubber pads 157, to reduce vibration and also act as sound deadening means. The outer ends of the side rails 155 are provided with a cross-bar 158 for limiting the sliding of the casing on the cradle frame and retaining the casing in position on the cradle frame.

The present air conditioning unit is arranged so that the evaporator is separated from the condenser by the housing provided for the mounting of the evaporator, so that the room air may be drawn through the opening 115 and thence through the filter, evaporator and into the impeller, and the conditioned air delivered to a cold air chamber located above the evaporator and turbine, and discharged therefrom through anopening 118 in the peripheral edge of the casing. A plurality of individually operable louvers arelocated in thisopening 118, which may be adjusted to cause the air to flow in several difierent directions, and the flow. of air is furthercontrollcd by the three horizontally disposed louvers located below the independently operable louvers. The horizontal louvers are operable by alever 136 simultaneously. In this manner directional control of air movement through thesystem is at the option of the user.

The evaporator and its housing is disposed above thebottom wall 10 of the casing providing apassage 65 for fresh air delivery to the evaporator. The fresh air is admitted through the louvers in thesides 12 and is drawn through the passageway beneath the evaporator Where it is pro-cooled to a certain degree as it passes beneath theshelf 50 which supports the evaporator. This fresh air before entering the passageway passes through the filter orscreen 75 so that a certain amount of foreign matter is eliminated before the air enters. thefilter 84 which will remove any dust, pollen, soot and the like from the air. Thispassageway 65 as well as the opening 115 is controlled by a damper 66 hinged to the inner end of the bottom wall and which damper is operated by the insertion of the hand through the opening 115 so that either room air is admitted at 115 to the evaporator or only fresh air through thepassage 65; then again by pushing this damper in an intermediate position a mixture of room and fresh air can be admitted to the evaporator for the purpose of conditioning the air before delivery to the cold air chamber, and then to the room through the direction control of the two sets of louvers in the cold air discharge outlet. The

, bulkhead orpartition 60 andback wall 52 of the evaporator housing separate the evaporator from the compressor and motor and condenser, as the only communication.

therebetween is had by thepassage 65 beneath the evaporator housing. As thefan 44 draws fresh air through thesides 12 it directs the air through the condenser without the air being delivered to the evaporator being contaminated in anyway. Furthermore, theshroud 100, which is connected to the condenser, and through which the fan44 is located, separates. the condenser and thewarrn air issuing therefrom, from entering the casing through the shroud and mixing with the air that would pass to the evaporator through thepassage 65.

Any heat developed by the compressor 36 and motor 38 will be evacuated by thefan 44 so that in a sense thecompressor 32 and motor 38 are separated from the evaporator and they in turn are separated from the condenser by theshroud 100, so that the supply of fresh air to the evaporator is entirely separate and distinct from any air that is delivered to the condenser. The fresh air going to the evaporator is drawn primarily from the side louvers of thesides 12, which are adjacent theintake passage 65 and theimpeller fan 42 produces a stronger suction to overcome the pull of thecondenser fan 44 which is forcing air in the opposite direction, although both theimpeller 42 andfan 44 are driven from the same motor 38. The condenser fan will continue to draw in its normal air and forcing the air through the condenser in the opposite direction with no measurable change in its capacity due to the open position of the damper 66. This is due to the fact that the louver openings in thesides 12 are sufficient to furnish both fans without affecting the operation of either. I

If the room to be conditioned is filled with stale or impure air due to smoking or otherwise, the damper 66 would be swung to a position to close the opening 115,

whereupon the fresh air would be drawn through thepassageway 65 and through theevaporator and discharged 7 into the room and the stale air in the room would be expelled from the room through theopening 139. Thelid 141 in this instance in thetop wall 109 would be opened, Figure 5, and the room air would be exhausted through theopening 139 into the motor compressor compartment, and drawn by thefan 44 through theshroud 100 and then through. the condenser to atmosphere. It will be apprc ciated that the positioning of the damper 66 and thelouvers 122 and 123 permits the user to regulate and control the supply of air to and from the room to be conditioned.

The evaporator is supported in its housing on ashelf 50, which is provided withtubes 93 for draining any condensate that is collected by the shelf, and which condensate is collected on the bottom 10 in thegrooves 94. The bottom slopes in an outward direction or is inclined so the condensate will drain into asump 95 in the outer end of the casing, where it is discharged by thefan 44 andslinger ring 104 against and through the condenser to the atmosphere.

I claim:

1. In a room air conditioning unit, a casing having openings at the ends thereof, a condenser mounted in said casing and disposed at one of said open ends, a removable: hood consisting of a front, top and side walls mounted on said casing and extending over the other open end thereof, a housing mounted in said casing at said last mentioned open end, comprising a back wall having a shelf and a cold air deck extending laterally therefrom and arranged in spaced relation to each other, a turbine cage connected to said back wall, an air intake opening in said back wall between said deck and shelf for communication with said turbine cage, a turbine in said turbine cage, an evaporator mounted on said shelf extending across said opening and beneath said cold air deck being operatively connected to said condenser, said cold air deck having engagement with the front wall of said hood, a bulkhead provided along the rear of said cold air deck and said turbine cage, said turbine cage having an air outlet opening for delivering cold air onto said deck, said hood having an air outlet at the peripheral edge thereof through which air is discharged from said cold air deck, said casing and said front wall of said hood being spaced from each other at the bottoms thereof to provide an air intake opening.

.2. In a room air conditioning unit, a casing comprising a top and a bottom wall havingan opening at one end thereof, a condenser disposed in said casing at saidv open end, a housing disposed in said casing at the opposite end thereof from said condenser, comprising a cold air deck and a shelf arranged in spaced parallel relation and extending transversely of said cas ing with said deck spaced from said top wall of said casing and said shelf spaced from said casing bottom wall, a back wall connected to said deck and shelf for closing the space between said deck and shelf, an evaporator disposed between said shelf and said deck, a turbine cage on the outer side of said back wall having communication with space above said deck and a turbine mounted therein, said back wall having an air intake opening communicating with said turbine cage and evaporator, a bulkhead on said deck and turbine cage to provide with said deck and casing a cold air chamber, said casing above said deck having an air outlet opening, and at the bottom thereof provided with an air inlet opening communicating with said evaporator.

3. in a room air conditioning unit, a casing comprising a top and a bottom wall having an opening at one end thereof, a condenser disposed in said casing at said open end, a housing disposed in said casing at the opposite end thereof from said condenser, comprising a cold air deck and a shelf arranged in spaced parallel relation and extending transversely of said casing with said deck spaced from said top Wall of said casing and said shelf spaced from said casing bottom wall, a back wall connected to said deck and shelf for closing the space between said deck and shelf, an evaporator disposed between said shelf and said deck, a turbine cage on the outer side of said back wall having communication with space above said deck and a turbine mounted therein, said back wall having an air intake opening communicating with said turbine cage and evaporator, a bulkhead on said deck and turbine cage to provide with said deck and casing a cold air chamber, said casing above said deck having an air outlet opening, and at the bottom thereof provided with an air inlet opening communicating with said evaporator and a damper hinged to and extending transversely of said bottom wall for controlling the flow of air through said last mentioned air inlet opening.

4. in a room air conditioning unit, a casing having a bottom, a top, louvered sides, a front, and an open rear wall, a condenser located adjacent said open rear wall, a housing in said casing including a deck extending transversely of said casing and rearwardly from said front wall, end panels supporting said deck mounted on said bottom wall, a shelf connected to said end panels above said bottom wall to provide a passage therebetween, a back wall connecting said deck and shelf to provide an evaporator chamber between said front' wall, shelf, deck and back wall, an evaporator on said shelf operatively connected to said condenser, said back wall and disposed between said deck and said shelf and having an air outlet opening therein, an impeller cage connected to said backwall around said air outlet opening, a rotary impeller in said cage, said front wall and said bottom wall being in spaced relation to provide an air intake opening for admission of air to said evaporator housing, a damper extending transversely of and hinged to said bottom wail for engagement with said front wall and said shelf for controlling the flow of air through said air intake opening and said passage, a partition on said deck and said impeller cage and extending to said top wall for forming an air distributing wall for a cold air chamber formed by said partition, deck, front, top and side walls of said casing, said casing being provided with an air outlet opening for said cold air chamber, and said impeller cage being provided with an air outlet for communication with said cold air chamber.

5. In a room air conditioning unit, a casing having a bottom, a top, louvered sides, a front, and an open rear wall, a condenser located adjacent said open rear wall, a housing in said casing including a deck extending transversely ofsaid casing and rearwardly from said front wall, end panels supporting said deck mounted on said bottom wall, a shelf connected to said end panels above said bottom wall to provide a passage therebetween, a back wall connecting said deck and shelf to provide an evaporator chamber between said front wall, shelf, deck and back wall, an evaporator on said shelf operatively connected to said condenser, opposed vertical channel members mounted on said end panels having a ledge at their lower ends, a filter received in said channels in front of said evaporator and supported by said ledges, saidback wall having an air outlet opening therein, animpeller cage connected to said back wall around said air outlet opening, a rotary impeller in said cage, said front wall and said bottom wall being in spaced relation to provide an air intake opening for admission of air to said evaporator housing, a damper extending transversely of and hinged to said bottom wall for engagement with said front wall and said shelf for controlling the flow of air through said air intake opening and said passage, a partition on said deck and said impeller cage and extending to said top wall form ing an air distributing wall for a cold air chamber formed by said partition, deck, front, top and side walls of said casing, said casing being provided with an air outlet opening for said cold air chamber, and said impeller cage being provided with an air outlet for communication with said cold air chamber.

6. In a room air conditioning unit, a casing corriprising a top and a bottom wall having an opening at one end thereof, a condenser disposed in said casing at said open end, a housing disposed in said casing at the opposite end thereof from said condenser, comprising a cold air deck and a shelf arranged in spaced parallel relation and extending transversely of said casing with said deck spaced from said top wall of said casing and said shelf spaced from said casing bottom wall, a back wall connected to said deck and shelf for closing the space between said deck and shelf, an evaporator disposed between said shelf and said deck, a turbine cage on the outer side of said back wall having communication with space above said deck and a turbine mounted therein, said back wall having an air intake opening communicating with said turbine cage and evaporator, a bulkhead on said deck and turbine cage to provide with said deck and easing a cold air chamber, said casing above said deck having an air outlet opening, and at the bottom thereof provided with an air inlet opening communi atin with said evaporator, said shelf and bottom wall being ,arranged in spaced relation to provide a fresh air passage therebetween, and a damper pivoted to said casing and extending transversely thereof for controlling the flow of air through said air passage and said last mentioned air inlet opening. l

7. In a room air conditioning unit, a casing comprising a top, a bottom and side walls, a condenser disposed in said casing at one end thereof, a housing disposed in said casing at the opposite end thereof from said condenser and projecting forwardly therefrom, said housing comprising a cold air deck and a shelf arranged in spaced parallel relation and extending transversely of said casing with said deck spaced from said casing top wall and said shelf spaced from said casing bottom wall, a back wall connected to said deck and shelf, an evaporator disposed between said deck and shelf, a turbine cage on the outer side of said back wall having communication with the space above said deck and an impeller mounted therein, said back wall having an air intake opening communicating with said turbine cage and evaporator, a hood having sides, top and front walls enclosing said housing to provide an evaporator chamber beneath said deck and a cold air chamber above said deck, a bulkhead on said deck and turbine cage having engagement with said hood top wall, said hood front wall having an air outlet opening communicating with said cold air chamber and an air intake opening between the bottom thereof and said 10 casing bottom wall communicating with said evaporator chamber.

8. In a room air conditioning unit, a casing comprising a top, a bottom and side walls, a condenser disposed in said casing at one end thereof, a housing disposed in said casing at the opposite end thereof from said condenser and projecting forwardly therefrom, said housing com prising a cold air deck and a shelf arranged in spaced parallel relation and extending transversely of said casing with said deck spaced from said casing top wall and said shelf spaced from said casing bottom wall, a back wall connected to said deck and shelf, an evaporator disposed between said deck and shelf, a turbine cage on the outer side of said back wall having communication with the space above said deck and an impeller mounted therein, said back wall having an air intake opening communicating with said turbine cage and evaporator, a hood having sides, top and front Walls enclosing said housing to provide an evaporator chamber beneath said deck and a cold air chamber above said deck, a bulkhead on said deck and turbine cage having engagement with said hood top wall, said hood front wall having an air outlet opening communicating with said cold air chamber and an air in-. take opening between the bottom thereof and said casing bottom wall communicating with said evaporator chamher, said shelf and bottom wall being arranged in spaced relation to provide a fresh air passage therebetween, and a damper pivoted to said casing and extending transversely thereof for controlling the flow of air through said air passage and said last mentioned air inlet opening.

9. In a room air conditioning unit, a casing comprising a top, a bottom, and side walls, a condenser disposed in said casing at one end thereof, a housing disposed in said casing at the opposite end thereof from said condenser and extending transversely of the casing, said housing comprising end panels, a deck mounted on said panels, a shelf disposed between said end panels and arranged beneath said deck and above the bottom of said casing, a back wall connected to said deck and shelf for closing the space between said deck and shelf along one side of said housing, said back wall being provided with an air outlet opening near one end thereof, an impeller cage connected to the rear side of said back wall and around said air outlet opening, an impeller mounted in said impeller cage, said deck having an air intake opening in communication with said impeller cage, an evaporator mounted on said shelf and extending lengthwise thereof and across said outlet opening of said back wall, said casing walls enclosing said housing to provide an evaporator chamber beneath said deck and a cold air chamber between said deck and said casing top wall, a bulkhead ex tending transversely of said housing and disposed between said deck and said casing top wall to form the rear wall of said cold air chamber, said casing having an air outlet opening in communication with said cold air chamber and an air inlet to said evaporator chamber.

10. In a room air conditioning unit, a casing comprising a top, a bottom, and side walls, a condenser disposed in said casing at one end thereof, a housing disposed in said casing at the opposite end thereof from said condenser and extending transversely of the casing, said housing comprising end panels, a deck mounted on said panels, a shelf disposed between said end panels and arranged beneath said deck and above the bottom of said casing, a back wall connected to said deck and shelf for closing the space between said deck and shelf along one side of said housing, said back wall being provided with an air outlet opening near one end thereof, an impeller cage connected to the rear side of said back wall and around said air outlet opening, an impeller counted in said impeller cage, said deck having an air intake opening in communication with said impeller cage, an evaporator mounted on said shelf and extending lengthwise thereof and across said outlet opening of said back wall, a filter, means on said end panels for supporting said filter in front of said evaporator, said casing walls enclosing said munication with said cold air chamber and an air inlet 7 to said evaporator chamber.

11. In a room air conditioning unit, a casing comprising a top, a bottom, and side walls, a condenser disposed in said casing at one end thereof, a housing disposed in said casing at the opposite end thereof from said condenser and extending transversely of the casing, said housing comprising end panels, a deck mounted on said panels, a shelf disposed between said end panels and arranged beneath said deck and above the bottom of said casing, a back wall connected to said deck and shelf for closing the space between said deck and shelf along one side of said housing, said back wall being provided with an air outlet opening near one end thereof, an impeller cage connected to the rear side of said back wall and around said air outlet opening, an impeller mounted in said impeller cage, said deck having an air intake opening in communication with said impeller cage, an evaporator mounted on said shelf and extending lengthwise thereof and across said outlet opening of said back wall, said casing walls enclosing said housing to provide an evaporator chamber beneath said deck and a cold air chamber between said deck and said casing top wall, a bulkhead extending transversely of said housing and disposed between said deck and said casing top wall to form the rear wall of said cold air chamber, said casing having an air outlet opening in communication with said cold air chamber and room air intake opening to said evaporator chamber.

12. In a room air conditioning unit, a casing comprising a top, a bottom, and side walls, a condenser disposed in said casing at one end thereof, a housing disposed in said casing at the opposite end thereof from said condenser and extending transversely of the casing, said housing comprising end panels, a deck mounted on said panels, a shelf disposed between said end panels and arranged beneath said deck and above the bottom of said casing, a back wall connected to said deck and shelf for closing the space between said deck and shelf along one side of said housing, said back wall being provided with an air outlet opening near one end thereof, an impeller cage connected to the rear side of said back wall and around said air outlet opening, an impeller mounted in said impeller cage, said deck having an air intake opening in communication with said impeller cage, an evaporator mounted on said shelf and extending lengthwise thereof and across said outlet opening of said back wall, said casing walls enclosing said housing to provide an evaporator chamber beneath said deck and a cold air chamber between said deck and said casing top wall, a bulkhead extending transversely of said housing and disposed between said deck and said casing top wall to form the rear wall of said cold air chamber, said casing having an air outlet opening in communication with said cold air chamber and room air intake opening to said evaporator chamber, said back wall and shelf being spaced from said bottom wall to provide a fresh air passageway therebetween for supplying fresh air to said evaporator, means for controlling the flow of air through said passageway and room air intake opening, and means for operating said turbine for drawing air through said air intake opening, evaporatorand said impeller cage and discharging the air to said air chamber and through said outlet in said casing.

13. In a room air conditioning unit, a casing comprising a top, a bottom, and side walls, a condenser disposed in said casing at one end thereof, a housing disposed in said casing at the opposite end thereof from said condenser and extending transversely of the casing, said housing comprising end panels, a deck mounted on said panels, a shelf disposed between said end panels and arranged beneath said deck and above the bottom of said casing, a back wall connected to said deck and shelf for closing the space between said deck and shelf along one side of said housing, said back wall being provided with an air outlet opening near one end thereof, an impeller cage connected to the rear side of said back wall and around said air outlet opening, an impeller mounted in said impeller cage, said deck having an air intake opening in communication with said impeller cage, an evaporator mounted on said shelf and extending lengthwise thereof and across said outlet opening of said back wall, a hood having sides, a top and front wall enclosing said housing to provide an evaporator chamber beneath said deck and a cold air chamber above said deck, a bulkhead extending from said turbine cage and across said deck transversely of said housing and disposed between said deck and the top of said hood for forming the rear wall of said cold air chamber and directing the air toward the front wall of said hood, said front wall of said hood hav ing and air outlet opening along the peripheral edge thereof and an air intake opening between the bottom of said front wall and the forward edge of said bottom of said casing.

14. In a room air conditioning unit, a casing compris ing a top, a bottom, side walls, a condenser disposed in said casing at one end thereof, a housing disposed in said casing at the opposite end thereof from said condenser and extending transversely of the casing, said housing com prising end panels, a deck mounted on said panels, a shelf disposed between said end panels and arranged beneath said deck and above the bottom of said casing, a back Wall connected to said deck and shelf for closing the space between said deck and shelf along one side of said housing, said back wall being provided with an air outlet opening near one end thereof, an impeller cage connected to the read side of said back wall and around said air outlet open ing, an impeller mounted in saidimpeller cage, said deck having an air intake opening in communication with said impeller cage, an evaporator mounted on said shelf and extending lengthwise thereof and across said outlet opening of said back wall, a hood having sides, a top and front wall enclosing said housing to provide an evaporator chamber beneath said deck and a cold air chamber above said deck, a bulkheadextending from said turbine cage and across said deck transversely of said housing and disposed between said deck and the top of said hood for forming the rear wall of said cold air chamber and directing the air toward the front wall of said hood, said front wall of said hood having an air outlet opening along the peripheral edge thereof and an air intake opening between the bottom of said front wall and the forward edge of said bottom of said casing, a plurality of vertically disposed louvers independently and adjustably supported. by said hood in said outlet opening for directional control of air issuing through said outlet opening.

References Cited in the file of this patent UNITED STATES PATENTS

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