US2330914A - Refrigerating apparatus - Google Patents

Description

oct. 5, 194s. l L. A. 'PHIL'IPP 2,330,914

REFRIGERATING APPARATUS original Filed'Aug. 8, 1940 6 sheets-sheet 1 y A BY L', QW

ATTORNEY.

Oct. 5, 1943.

original Filed Aug. 8, 1940 L. APHHLIPP REFRIGERATING APPARATUS 6 Sheets-Sheet A2 'Bf W ATTORNEY.

Oct. 5, 1943. i L. A. PHILIPP v 2,330,914

REFRIGERATING APPARATUS I Original Filed Aug. 8, 1940 6 Sheets-Sheet I5 1NVNTOR.

ATTORNEY.

Oct. 5, 1943. L. A. P HILIPP 2,330,914

REFRIGERATING APPARATUS Original Filed Aug. 8, 19`4O 6 Sheets-Sheet 4 INVENTOR quel-:46E Pam/PP BY alaa- ATTORNEY.

REF-RIGmux'rING APARATUs Original Filed Aug. 8, 1940 6 Sheets-Sheet 5 1NVENTOR. Lqwz: uca Ply/MPP BYWLW ATTORNEY.

Oct. 5, 1943. L A. PHxLlPP 2,330,914

REFRIGERATING APPARATUS original Fiied Aug. 8. 1940 s sneetsfsneet e ATTORNEY.

Patented Oct. 5, 1943 2,330,914 REFRIGERATING APPARATUS Lawrence A. Philipp, Detroit, Mich., assgnor to ANash-Kelvinator Corporation, Detroit, Mich., a

corporation of Maryland Original application Aug-ust 8, 1940, Serial No.

351,834. Divided and this application February 24, 1941, Serial No. 380,239 y 2 Claims.

This invention relates to refrigerating apparatus, and more particularly to refrigerating apparatus of the multiple temperature type.

The present application is a division of my co-pending application Serial No. 351,834, ledv August 8, 1940, for Refrigerating apparatus.

One of the objects of my invention is to provide a new and improved arrangement for freezing substances, and for cooling circulating air in a refrigerator cabinet so as to maintain a relatively high humidity within the cabinet.

Another object of my invention is to provide an improved refrigerating system wherein large quantities of substances may be frozen and at the same time circulating air for cooling foods an'd the like may be cooled without undue dehydration of moisturev from the air and without 1 the collection of frostand ice upon the said system which would cause inoperative conditions periodically'for defrosting.-

Another object of my invention is to provide an improved refrigerating system for freezing substances and for the preservation of foodstuffs such as meats which require somewhat .lower temperature than other foods, and to arrange..

the system in such a way that the meats `or the like may be refrigerated to a point slightly above an improved refrigerating system which includes heat absorbing means having the different portions thereof separated by a fixed restriction which vprovides for the operation of one portion at a higher pressure and temperature thanthe other portion, and to provide for the ow of liquid refrigerant to the heat absorbing means by a small diameter tube, and to pass the evaporated refrigerantin thermal heat exchange with s'aid small diameter tube so as to pre-cool the liquid refrigerant in the cabinet.

Another object of my invention is to divide the interior of the food storage compartment by a casing so as to provide a freezing zone, and to provide for refrigerating the air in the foodcompartment and the freezing zone by heat absorbing units positioned in the zoneand in said cornpartment, and to support a drip receiver by said casing for collecting drip water from the various heat absorbing units.

Another object of my invention is to provide an improved refrigerant evaporating element for cooling circulating air and which consists of vertically extending spaced apart fins and a refrigerant evaporating conduit extending therethrough, with the conduit being so arranged that a lesser area of iin is associated with the conduit in the upper region thereof than in the lower region thereof.

Another object of my invention is to provide for the ready removability of an entire refrigerating system including three sections of heat absorbing elements and a motor-compressor-condenser unit from the cabinet having a food storage compartment, a freezing compartment and a machine com-partment.

Another object of my invention is to provide a new and improved drip trough which has the general formation of a V.

Another object of my invention is to provide an improved control device for the aforementioned refrigerating system which includes thermo-sensitive means having a portion extending into the freezing zone and another portion extending into an air cooling zone, and arranged so that each of said portions cooperate to control a power device for the control element.

Another object of my invention is to provide means for Ventilating the insulation of the cabinet adjacent an ice freezing section of heat absorbing means so as to freeze out any moisture from the air in the insulation by its attraction to the ice making element.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a preferred form of the present invention is clearly shown.

In the drawings:

Fig. 1 is a front view in elevation of my improved refrigerator showing a portion broken away; y

Fig. 2 is a diagrammatic illustration of the refrigerating system utilized for refrigerating the refrigerator shown in Fig. 1;

Fig. 3 is a view taken along the line 3-3 of Fig. 1;

Fig. 4 is a view taken along the line 4-4 of Fig. 3;

Fig. 5 is a View taken along the line 5 5 of Fig. 4;

Fig. 6 is a view taken along the line 6 6 of Fig.4; d

Fig. '7 is a perspective view of my improved heat absorbing means;

Fig. 8 is a rear view of the lining of the refrigerator showing a partition element secured Within the interior of the lining;

Fig. 9 is a perspective View of a removable baille;

Fig. 10 is a view taken along the line |8-|8 of Fig. i

Fig. 11 is a fragmentary view taken in the direction of the arrows ||l| of Fig. 3;

Fig. 12 is a view taken along the line |2|2 of Fig. 11;

Fig. 13 is a view taken along the line I3-I3 of Fig. 4;

Fig. 14 is a view taken along the line I 4| 4 of Fig. 13;

Fig. 15 is a View of the V-shaped drip trough; and

Fig. 16 is a view in elevation showing a portion broken away of a switch element used for con'- t'rolling the. operation of my refrigerating system.

Referring to the drawings, Fig. 1 discloses my improved refrigerator cabinet, designated in general by the numeral 28. Within this refrigerator cabinet I have disposed refrigerating system disclosed in Fig. 2.

Referring to Fig. 2, my improved reirigerating system includes a. motor compressor unit 24, condenser 26, high temperature heat absorbing sections 28 and 38, low temperature refrigerating sections 32, 34, 36 and 38, and. an accumulator 48. Evaporated refrigerant is withdrawn from the accumulator 48 through a vapor return conduit 42 whence it passes to the motor compressor v must pass through a fixed restriction, or small diameter tube 56. This reduces the pressure of refrigerant flowing te the sections 32, 34, 36 and 38 so as to maintain a higher temperature in the sections 28 and 38 than in sections 32, 34, 36 and 38. This system is of the non-flooded type wherein droplets of liquid refrigerant are passed into the heat absorbing sections, but due to the absorption-of heat very little, if any, liquid refrigerant passes into the accumulator 48. Thus, the refrigerant passing through conduit 42 is gaseous refrigerant and, as disclosed, I have arranged the;.conduit 42 in thermal heat exchange relation with the small diameter tube 48 so as to cool theliquid refrigerant passing through the tube 48. These two conduits may be secured together by solder if desired.

Referring more specifically tothe drawings, and more particularly to Figs. 3 and 4, the re-V frigerator cabinet includes an outer casing 68 and an inner liner 62. Insulation 64 is interposed between the walls 68 and 62 to insulate a foodzstorage compartment 66 formed by the inner Walls of the liner 62. The outer casing extends downwardly to provide a machine compartment 66. A base- 18 is provided for the cabinet and is open as at 12 to provide for the free circulation of air through the machine compartment.

Within the machine compartment I have. disposedv my motor compressor unit 24 and condenser 26. The motor compressor unit is mounted upon an angle iron 16 which is supported by the base 18. At the rear of the cabinet I have provided a flue 88 for aiding and setting up a natural draft of air over the motor compressorv unit and condenser to take the heat of condensation out of the machine compartment 88. yIt will be noted that on the inner side of the nue 88 I have provided insulating material 84, which may preferably be of sound absorbing characteristics. As indicated, the insulation is formed of sheet cork. It may, however, be of any suitable fibrous material which has characteristics for sound absorbing. The front of the cabinet is cut away as at 98 so as to provide an opening for gaining access to the machine compartment. This opening is closed by a door 92 which is formed of `double walled sheet metal having ends 94 and 86 which carry gasket-material 98. These ends are turned in toward each other and are spaced apart so as to receive an angle member |88 carried by the base 18. Bythis arrangement it is possible to tilt the door outwardly away from the machine compartment at its upper edge. The angle member |88 may extend from one side of the machine compartment to the other if desired or -part way so that it will be suilicient for supporting the weight of the door. On the rear side of the door I have provided a. vegetable bin |84 which is secured to the door in any suitable manner and is tiltable with the door. Thus when the upper part of the door 92 is tilted outwardly away from.

the machine compartment, access may be had to the interior of the vegetable bin. The bin includes bottomwall |86, side walls |88 and rear wall I I8. Secured to the rear wall is a slab of insulating material ||2, which, as indicated, is formed of sheet cork. This insulating material ||2 like insulating material 64 may be of any suitable maplaced on an incline, with the lower portion being directly over the lowermost portion of iiue 86 while'the upper portion of the condenser is positioned slightly within the machine compartment 68. As will be noted in Fig. 2, the condenser is formed of a serpentine coil having spaced apart ns therein so as to be very eifective inthe dissivand over the -motor compressor unit and condenser and out through the flue to thus remove the heat of condensation. By placing the inner wall I|8 of the vegetable bin at an angle it tends to guide the flow of air toward the motor compressor vunit as the air travels upwardly due to the natural draft flow of air. Also, as air passes upwardly through the flue over the lower portion of the condenser, it tends to create an aspirating effect to draw air through the machine compartment over the motor compressor unit at the upper portion of the condenser.

The insulation 64 includes slab |28 in the bottom wall, |22 in the rear wall, |24 in the top wall and '|26 and |28 in the side walls. As indicated in the drawings, this insulation is shown as slabs of cork. However, any suitable type of insulation may be used such as fibrous material, Rock Woo or the like. In addition, insulation |38 is provided in the rear wall so that it may be readily removed. Conduits 42 and 48 enter the rear wall of the refrigerator and pass into the food compartment through insulation |38. 'If the insulation is made of cork, such cork may be slotted to receive the conduits and to permit removal b of the insulation from each side ofthe conduits or if it is loose fibrous material such insulation may be readily removed by simply removing rear panel |34 of the cabinet by removing nuts |36 from bolts |38. On the inner side of the insuvlation |30 is a removable panel |40 which may be readily removed by removal of nuts |42 from bolts |44. The panel |40 carries the heat absorbing portion of the refrigerating system and includes sections 28, 30, 32, 34, 36, 38 and accumulator 40, as is clearly shown in Figure 7. The sections 28 and 30 are utilized for cooling circulating air within the food storage compartment while .the other sections ofthe heat absorbing means are utilized for freezing ice in an ice freezing zone within the interior of the metal casing |46. The casing |46 is formed preferably ofstainless steel or steel having a coating of vitreous enamel in the general shape of a U and includes upright walls |48 and bottom wall |50. The upright walls have their ends securedv to the top wall of the liner 62 and the rear edges of the upright walls are in engagement with the rear wall of the liner 62. The rear wall of the liner 62 is provided with an opening |54 which is closed by the removable. panel |40. The upright walls |48 extend vertically across such opening. This opening |54 is provided for the ready insertion or removability of the heat absorbing sections of the system as is hereinafter more fully described. The bottom wall |50 of the casing |46 is provided with up-v wardly directed corrugations |60 upon which may be inserted receptacle |62. The bottom wall is also provided with an opening |64 to permitI drip water from the refrigerating sections in the casing to flow from the casing when such sections are defrosted. The casing |46 has secured thereto guideways for receiving lips |12 of drip pan |14. This enables the drip pan to slide on the guiedways |10 so that it may be readily removed from beneath the casing. Drip collectors |16 are also carried by the casing |46 to collectany moisture that may drip from the casing and conduct such moisture to the drip receptacle. The drip collectors |16 and the guideways |10 are secured to the casing by means of bolts |80.

The entire heat absorbing means is carried by the removable wall |40 and includes portions for ice making and air cooling. The portion utilized for ice making includes a U shaped sheet metal member |84 of single thickness which has secured thereto an upper shelf |86 and a shelf |88 positioned therebelow. The shelf |88 is removably mounted to the U shaped member |84 so that it may be readily removed from the said member. The removable shelf is carried by lugs |90 and is shelf may be lifted upwardly and then removed through the open front of the U shaped member |84. To the U shaped member is secured the heat absorbing sections v32, 34,36 and 38. The sections 32 and 3'6 are secured to the side walls of the member |84 and the section 34 is secured ,to

tions of the ns in a horizontal plane andA parallel' runsxtendjgrough the lower portionof the fins refrigerating coil in' the upper portion of the lns per n area than in the lower portion. The reason for this arrangement is that warm circulating air in the food storage compartment 62 comes in contact with the uppermost portion of the ns rst and tends to warm up the fins at that point. v

Consequently the fins may be cooled to a lower temperature at that point than at the lower portionv of the ns where the air is somewhat cooled before it reaches that point. By this arrangement it is possible to have a small compact n area and at the same time direct the warm air over such 1in surfaces so that when the refrigerating system is in operation the collection of frost and moisture on the fins will be evenly distributed so that during periods whenv the compressor is not operating the frost and ice accumulated on the ns will entirely melt off before the compressor again resumes operation. As will be noted, the U shaped member |84 and the ice making sections 32, 34, and 38 are disposed within the casing |48 in spaced relation v provided with slots |92 so that the removable The accumulator 40 is also positioned As will be noted in Figthereto. within the casing |46.

ure 3, the accumulator is elliptical shape in cross section and includes an inlet pipe 220 near the lower portionfof the accumulator and an outlet conduit 222 adjacent the upper portion of the accumulator. that may get into the accumulator 40 would enter near the bottom thereof while the gaseous refrigerant would leave by the outlet 222 from the upper part of the accumulator. The bottom wall of the U shaped member, shelf |88 and shelf |86 are all provided for supporting ice making receptacles 224. It will be noted that when the U shaped member |84 is positioned within the casing |46 and it is positioned somewhat above the bottom wall |50 of the casing. This provides ample space for the receptacle |62. The receptacle |62 is provided with a lid 228 which may be loosely fitted on the receptacle |62 to provide ventilation therebetween or may tightly engage' the upper edge of the receptacle and have one or more small holes (not shown) positioned in the lid so as to give Ventilation to the foodstuff stored therein. Preferably the receptacle 62 is provided for the storage of meats and at, for example, slightly above the freezing point of water.

This is accomplished by operating the refrigerating sections-32, 34, 36 and 38 sufficiently low enough for freezing substances but due to a removable panel 230 carried by flanges 234 on the bottomof the U shaped member |84 the temperature therebelow is above the freezing point of water. This panel acts to insulate the direct effect of the cooling of the section 34 and maintains the temperature therebelow approximately at 34 degrees F. When it is desired to refrigerate the space below the panel 230 to a lower temperature, such panel is removed and, for example, placed u nder the receptacle |62. At this time the receptacle will be refrigerated to a temperature below the freezing point of water and if it is desired meats may be stored in the receptacle at this time and frozen. -Also if desired the removable shelf |88 may be removed and the receptacle |62 may be inserted upon the bottom wall of the u shaped member directly below the shelf lss where the receptacle will be cooled to somewhat below the freezing point ofr water. Thus it is possible to shift the receptacle |62 .to various positions within the kcasing and provide-large storage spaces for the freezing of meats or the on a vertical p1an.'"*11ii`s"'prvvdeseihmereipreserralon0 fgQOds below tnerreezing point of By this arrangement any liquid water or slightly above the freezing point of water as desired. The sections 28 and 30 are used for cooling the circulating air within the food storage compartment. Removable -baies 240 are positioned in front of the sections 28 and 30 for directing the ow of air over the sections 28 and 30. The baiiles include imperforate portions 242 and slotted portions 244. Side anges 246 are provided with arcuate slots 248 for insertion over lugs 250 carried by the casing |46 on one side and lugs 252 carried by the liner 62 on the other side of the baiile. It will be noted in. the drawings that by simply raising the bailles upwardly the slots 248 disengage the lugs so as to permit the bailles to be readily removed. Immediately below the sections 28 and 30 are provided drip troughs 260 which are provided with louvers 262 in each side wall. The drip troughs include a projection 264 which. extends over the drip collectors |16 for conducting the drip water from the sections 28 and 30 to the drip pan |14. The

drip water rst collects in the trough 260 whence it passesover the projection 264 to the. drip collector |16 whence it passes into the drip pan |14. The troughs include straps 266 and 268. These drip troughs are removably connected to the rear wall of the liner by means of bolts 210. These bolts pass over the open end slot 212 in strap 268 and key-hole type slot 214 in strap 266 of trough 260. Suitable nuts 280 engage bolts 210 to clamp the troughs to the rear panel |40. 'A preferred |46. This gusset plate may be secured to flange 290 in any suitable manner such, for example, as by welding. A gusset plate of this type is provided for supporting the U shaped member |84 at the front thereof by bolts 298 and nuts 28T-,the rear of the U shaped member |84 being secured to panel |40 by means of bolts 300.

Also within the food storage compartment there is provided slidable shelves v304, which may be of any suitable open work construction. In addition, there is provided sliding receptacles 306, which may be of any suitable construction,

and are used primarily for the storage of vegetables. Supported above the receptacles 306 are transparent glass plates 300. The glass plates are independently suspended and are slidably removable independent of the receptacles 306. Likewise the receptacles 306 are independently suspended and are slidably removable and independent of glass covers 308. .K

Within the casing |46 and secured to the top wall of the liner 62 is a switch control element 3|0. This switch control element is of the pressure operated type well known inthe art and includes a vpower element in the form of an expansible bellows 3|4 (see Fig. 16). To the bellows is connected a small diameter conduit 3I6 which is provided with branch 3|8 and branch 3|0. Tothe branch 3|'8 is connected a thermal bulb 320 and to branch 3|8 is connected thermal bulb 322. The two thermal bulbs and the two branch conduits as well as conduit 3|6 are connected in open communication with the bellows 3|4 and withl each other. Preferably, the conthermal bulb 320 is primarily responsive to thetemperature of the heat absorbing section 30, and the thermal bulb 322 is responsive to the temperature of the U shaped member |84 and heat absorbing section 36. Thus, when the temperature of heat absorbing section 30 rises to a predetermined point, the volatile fluid therein will initiate the operation of the switch to control operation of the motor compressor unit., The switch 3|0 is operatively connected with the electric motor of the motor compressor unit to control the electric circuit thereof by electric conduits (not shown). 'I'he switch completes such electric circuit wheni there is a demand for refrigeration and interrupts such circuit when the demand has been satisied. As the temperature of the U shaped member |84 and heat absorbing section 36 rises to a predetermined point,

the thermal bulb 322 will initiate operation of the switch to start the motor compressor unit.

In the operation of my refrigerating system, I have arranged so that sections 28 and 30 of .the heat absorbing means cools the circulating air in the food storage compartment. Preferably, the switch 3|0 is adjusted so that during normal operation sections 28 and 30-col1ect a slight fllm of frost on the fins and refrigerant conduit during operation of the motor compressor unit, and this slight film of frost melts oft when the compressor unit is not operating. Due to the fixed restriction 56, which is interposed between the section 30 and section 32 of the heat absorbing means. the pressure in sections 28 and 30 is somewhat greater than in the ice making sec- ' tions 32, 34, 36 and 38. 'I'hus it is possible to cool the circulating air in the food storage compartment and defrost the cooling elements by the cycles of refrigeration-while at the same time freeze ice by another portion by the heat absorbing means. Due to the fixed restriction 66,

.the pressure and temperature in the ice making. y

sections is sufficiently low during operation of the motor compressor unit to provide for the rapid freezing of ice in the receptacles 234. While the sections 34 and 38 are adequate for the rapid freezing of ice in the receptacles placed thereabove, I have also provided sections 32 and 36 along the side Walls of the U shaped member |84 so as toV ald in retaining a low temperature within the confines of the U shaped member |84 when the motor compressor unit is not operating. This is due to the fact that with these added sections 32 and 36 the temperature within the confines ofthe U shaped member |84 is pulled down suiiiciently low as to hold its freezing temperature until during periods when the compressor is not operating so that such freezing temperature is maintained and until the motor compressor unit resumes operation. By arranging the switch 3|0 so that it is responsive both to the high temperature as Well as the low temperature heat absorbing units, it is possible to initiate operation of the motor compressor unit when either the ice making or box cooling sections require refrigeration. In some instances, it may be desirable to 'omit the conduit 3|9 and thermal bulb 322. At this time it is desired to point out. that the switch 3|4. which includes j belows 3|4, is'positioned part way inside the casing |46 where the low temperature air coni-ined in the casing comes in contact with the bellows 3|4. Consequently, the thermal bulb 320 may rise to a temperature. which would normally initiate operation of the switch, nevertheless that operation may be -delayed for a brief period.

of time due to the chilling down of the fluid in the bellows 3|4. The chilling down of the fluid in bellows 3|4 has a tendency to counteract the effectiveness of the rising temperature of the fluid contained within the thermal bulb 320. This sometimes is advantageous in that when such conditin occurs it is evident that the temperature in the casing |46 is such that it retains the frozen substances therein in their frozen condition and that delayed action of the switch would result in melting of frost and ice from the finsl of the air cooling sections of the heat absorbing means. Thus the 'system is balanced so as to properly cool circulating air in the food storage compartment and maintain substances in their vfrozen condition as well as initially freezing such substances. As will be noted, the ice making sections yof the heat absorbing means, as well -as the U shaped member |84, is spaced somewhat from the-walls of the casing |46. This isvso arranged that the circulating air confined within the casing |46 will not cause the cooling of the Walls or casing |46 to a very low temperature. By proportioning the ice making sections and spacing them from the walls of the casing, as disclosed herein, it is possible to operate my refrigerating system without the collection of moisture upon the outer surface of the casing |46 during days when the relative humidity is below a certain valueand never at such a temperature so as to collect frost on the outer surfaces'of the casing |45. The casing |46 also includes an inturned flange 325 about its front face which is engaged by a door 32'|. The door includes panel 329 and carries a rubber sealing gasket 33| which engages the flange 3,25 to seal the front of the casing |46. Secured to the panel 329 is a panel 325 arranged inspaced apart relation so as to provide a dead air space for the door. This limits the flow of heat through the door into the interior of the casing |46. The

system from the cabinet all that is necessary is door is hingedY as at 340 so as to permit ready access to the interior of the casing. casing |46 is sealed on top, rear and front walls,

. the circulating air within the food storage compartment cannot enter the interior of the casing and consequently the ice making sections of the heat absorbing means cannot extract moisture from air other than that which is confined within the interior of the casing |46. This small volume of air causes a very slight accumulation of frost upon the ice making sections of the heat absorbing means and U shaped member |84, thus requiring defrostlng of such sections and member only after long periods of operation. In view of the fact that the heat absorbing sections for cooling the circulating air defrost during periods when the compressor is not operating between each cycle of operation, it is unnecessary to shut the system down for defrosting. When the ice making sections of the heat absorbing means are defrosting, thedrip water drops to the bottom wall |50 of the casing |46 or falls upon the lid oi' receptacle |62 whence it flows to the bottom wall |50, and due to the corrugations |60 the drip water may freely now under the receptacle |62 and pass through opening |64. to drip pan |14.

Since the As will be noted in Fig. 6, rear panel |40 is provided with openings 350. These openings 350 provide for open communication between the air withinthe insulation and the interior of the casing |46. Thus if there is any moisture within the air in the insulation, it Will not be condensed out upon the rear 'wall of the panel |40 and cause the insulation to become wetted, -but instead the moisture along with the circulating air in the insulation will pass to the ice making sections of the Vheat absorbing means and such moisture will readily be frozen out of such air. In cooling the air in the food storage compartment, thev circulating air passes upwardly and through the slots 244 in battles 240. The air is then cooled by sections 28 and 30 and flows downwardly into troughs 260 and through the louvers 262 into thefood compartment below the troughs. This gives two distinct circulatory paths of air in the food compartment. The casing |46 also vdoes some cooling of the air 'in the food storage compartment.

When it is desired to remove the refrigerating the art that various modifications may be made i therein without departing from the spirit of the invention or from thescope of the appended claims.

I claim: l. Refrigerating apparatus comprising a cabinet havinga compartment to be Cooled, a casing positioned in said compartment, a refrigerated shelf positioned in and adjacent the upper portion of said casing `for freezing substances, a lower refrigerated shelf for freezing substances positioned in said casing below the rst refrigerated shelf and above the bottom wall of the casing to provide a storage space therebelow, a removable, shelf positioned between said refrigerated shelves, a receptacle positioned in said storage space, means for operating said refrigerated shelves for freezing substances placed thereon and Vfor cooling said receptacle slightly above the freezing point of water, the spacebetween said refrigerated shelves being such that when said removable shelf is removed said receptacle may be placed on the lower refrigerated shelf Wheny it is desired to cool the receptacle below the freezing point ofwater.

2. A refrigerant evaporating element comprising a plurality of vertically extending fins spaced apart in parallel relation, parallelruns of a. refrigerant evaporating coilextending through said fins on a. horizontal plane and parallel runs of a refrigerant evaporatingv coil extending through said ns below the first named coil and on a vertical'plane, the parallel runs of the coil extending on a. horizontal plane being positioned so that each run is closer to a side wall of the ns than the parallel runs extending on a ver-

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