US2177796A - Absorption refrigerator mechanism - Google Patents

Description

Oct. 31, 1939. E. a. ALLYNE ABSORPTION REFRIQERATOR MECHANISM e SheetsShe-t 1 Filed Jan. 3, 1958 INVENTOR I BY mural E-flll ne ATTORNEY Oct. 31, 1939.

E. E. ALLYNE ABSORPTION REFRIGERATOR MECHANISM Filed m. s, 1938 6 Sheets-Sheet 2' INVENTOR Edmund E.

&44\,l%

ATTORNEY Oct. 31, 1939. E. E. ALLYNE ABS ORP-T ION REFRIGERATOR MECHANI SM Filed Jan. 5, 19558 e Sheets-Shet s Il I I I27 Z4 Z/ INVENTOR Elfin-wand, E. A ZLyn BY ATTORNEY Oct. 31,1939.

E. E. ALLYNE 2,177,796

ABSORPTION REFRIGERATOR MECHANISM Filed Jan, 3, 1938 6 Sheets-Sheet 4 INVENTOR Edmund E.Au 7n 11 .3 I in .W

ATTO R N EY Oct. 31, 1939. E L E 2,177,796

' ABSORPTION REFRIGERATOR MECHANISM Filed Jan. 3, 1938 6 Sheets-Sheet 6 INVENTOR Edmund E-HLZ he ATTOR EY Patented oer. 31, 1939 PATENT OFFICE 2,177,796 ABSORPTION REFRIGERATOR MECHANISM Edmund 1].. Allyne, Cleveland, Ohio, assign'or to Allyne Laboratories, Inc., Cleveland, Ohio Application January 3, 1938, Serial l qo. 183,042

8 Claims.

This invention relates to refrigerators and more especially to the intermittent absorption type, wherein the-refrigerating mechanism is a selfcontained unit and removable as such from a re- I frigerator cabinet.

It has been the practice in the past to construct the refrigerating mechanism in separate sections, placing the sections in the refrigerator cabinet and into the several compartments pro- 10 vided therefor, and when in position to then connect the system in operative relation.

This method of construction makes it difiicult to service the unit in the field or to remove the unit mechanism as a whole from. the cabinet for repairs and later to replace the unit in the refrigerator cabinet.

The present invention provides a self-contained unit that may be constructed and fabricated as such, reducing the cost of manufacture and as- 20 sembly.

'An object therefore of the present invention is to provide an intermittent absorption refrigerating system, fabricated in one unit and slidable into a refrigerator cabinet after which it may 25 be secured in place.

Another object of the present invention isto,

provide a refrigerator cabinet having an insulated food chamber and mechanism compartments above, below and at the rear of the said 30 food chamber, an opening in one wall of the said chamber to permit freezing members of the unit to project therethru, and sealing means associated with the said freezing members, the said sealing means providing a closure for the open- 35 ing in the said wall of the food chamber.

' A still further object of the present invention is to provide a refrigerator cabinet having a food chamber therein, insulation surrounding the food chamber, an opening in one wall of the food 40 chamber, a mechanism compartment above the said chamber for the reception of an evaporator of the system, a mechanism compartment at the rear of the food chamber, and a mechanism compartment below the food chamber, thecompart- 45 ment at the rear of the food chamber beingv pro-' vided to receive the various conduits of the system, including a rectifier or dehydrator, and the compartment below the food chamber being provided to receive the generator absorber, condens- 50 er and coolingcoils, together withthe heating means such as gas or fuel burner. Freezing coils associated with supply conduits depending from the evaporator and associated therewith, the said freezing coils being provided with a closure mem- 55 ber, the said closure member being of greater overall dimensions than the opening in the wall of the food chamber and means for securing the closure member to the wall of the food chamber. The entire unit including all of the above mentioned elements being fabricated as one unit and 6 movably installed or removed from the refrigerator cabinet.

A further object -of the present invention is to provide an intermittent absorption refrigerator system having a refrigerator cabinet and pro vided with an insulated food chamber, and mechanism compartments exteriorly of the said chamber in which is located the various conduits and mechanism of the system, the said compartments being located above, at the rear of, and below 18 the said food chamber, and an intermediate flue compartment between said rear compartment and said lower compartment to permit air to flow-therebetween, thus providing an air insulated space between the mechanism of the system and the outer wall of the food chamber.

Another object of the present invention is to provide suitable air cooling means for the mechanism of an intermittent absorption refrigerator system wherein air flues are provided in the refrigerator cabinet, the air being induced to flow by means of the heat applied to the system and so arranging the flues and compartments as to provide eflicient air cooling for the mechanism therein.

Another object of the present invention is to provide a refrigerator cabinet for an intermittent absorption refrigerator system having therein an insulated food chamber, compartments above, at the rear and below the said chamber and air flues arranged in the rear and lower compartment and a housing enclosing the sides of a generator absorber and heating means for the said generator absorber. The bottom portion of the enclosure .being open and the top portion of the enclosure opening into a flue member the said flue member being in open communication and associated with air flues in which are located the circulatory coils of the system including the condenser, and providing therefor an induced flow of air, the air being induced to flow by means of the heat applied tothe generator absorber of the system, thejcool air being induced to flow upwardly through the said flues by the induction of the heated air from the generator absorber.

Other and further objectsof the present invention will be more fully understood from the following description when taken in connection with the drawings in which:

the cabinet in position.

Fig. 1 is a front elevational view of a refrigerator cabinet showing fragmentary views of the interior of the cabinet and the mechanism contained "therein.

Fig. 2 is a side elevational view of a refrigerator cabinet showing an absorption refrigerator system and the location of the various members in dotted Fig 3 is a side elevational view of the complete unit of an intermittent absorption refrigerator system.

Fig. i is a rear elevational view of a refrigerator cabinet being provided with an intermittent absorption refrigerator system.

Fig. 5 is a segmental top plan view of a refrigerator cabinet being provided with an intermittent absorption refrigerator system.

Fig. 6 is a fragmentai sectional elevational view of support means provided for the cooling coilsof the condenser.

Fig. 7 is a fragmental view of the clip clamp means for securing the removable back portion of Fig. 8 is a fragmental side view showing the evaporator, supply legs and freezing coils enclosed in insulation, and closure means secured to the freezing coils.

Fig. 9 is a fragmental rear view of the refrigerator cabinet showing the opening in the rear wall of the food chamber thru which the freezing coils-project and the means for securing the closure plate thereto.

Fig. 10 is a fragmental front view of the food chamber showing the freezing'coils and closure plate in place.

Fig. 11 is a fragmental sectional side view taken on lines ll-li of Fig. 1 and showing the generator absorber, fuel burner, fuel supply mechanism and circulatory coils of an intermittent absorption refrigerator system.

Fig. 12 is a top plan sectional view of the generator absorber and circulatory coils taken on lines i2-l2 of Fig. 11.

Fig. 13 is a top plan sectional view showing a portion of the insulation surrounding the food chamber and the rear mechanism compartment and taken on lines ll-ll of Fig. 11.

Fig. 14 is a side view of the generator absorber. circulatory coils therefor and the condenser reoeiver and circulatory coils positioned below the said receiver.

Fig. 15 is a rear view of the generator absorber,

circulatory coils therefore and the condenser receiver having circulatory coils therefore'located erator cabinetbeing provided with side walls c and I, a front I, a top portion 9, and a base ll,

the said base being provided with legs l2 of any conventional styling providing that a space II between the base portion H and the floor be open to permit air to enter therebetween. The side walls I and 'I' of the cabinet I are provided at their rear portion with inturned edges I4 and ,the front wall of ii, having spaced apart holes i6 near the edges thereof, the said holes being preferably threaded therein to receive screws I! or similar conventional securing means, the said screws being provided to secure a back wall I8 to the cabinet side walls, thereby providing a removable rear wall. It should be noted that the top 8 of the cabinet is provided at its rear with a turned down edge i9,-the purpose of which will be apparent as the description of the construction progresses.

It should be further noted that the base portion ii of' the cabinet is provided with inturned flanges 2|. The walls of the cabinet are also provided with inturned flanges 22. It should be noted that both of the above mentioned inturned portions are provided'with holes (not shown) the said holes registering and through which fastening means such as bolts 23.are secured rigidly in place by means of nuts 24. It should be also noted that the above mentioned flanged portions 2i and 22 form means for the support of various mechanisms of the system. The upper portion of the front wall 8 of the cabinet 5 is provided with an opening 25, the said opening being provided with a door 26 having conventional hinges 21 and exterior unlatching means 28 (the latching means not shown). The door is of the conventional refrigerator door design and provided with efficient insulation therein, the door being so arranged with the opening to thereby provide a tight closure and prevent the entrance of heat therethrough.

A second opening in the front wall of the cabinet is provided at 29 and is located in the lower portion of said front wall. A closure means ll, having inturned edge portions 32 the said inturned edge portions abut the front wall of the cabinet at 33. Suitable hinge means (not shown) are used for the said closure, thus providing means for access to the lower mechanism compartment.

The cabinet 5 is provided with a food compartment or chamber 36 having an open front portion 31, a ceiling 38, a floor 39, side walls ll and 42, the said side walls are parallel to side walls 6 and 1 respectively, and a rear wall '43. It will be noted that the food chamber front portion connects to and forms a part of the front wall of the cabinet, thus making a rigidbox like structure and providing complete support from the cabinet for the food It is preferred to provide the rear wall II of the food chamber with an opening 44, the opening however, may be provided in the ceiling or in one of the side walls without departing from the spirit of the invention. The edge portion II of the rear wall I! is formed with an inset l, the said inset being provided with spaced apart holes I therein, the purpose of which will be discussed in detail later.

It should be noted that the food chamber is completely surrounded by insulation H.- A portion it of the insulation is formed in an L shape and removable from the balance of the insulation, this removable L shaped insulation 48 forms an important member of this invention and will be discussed and described in detail under the mechanism description.

The insulation 41 is supported in the space between the'walls by an outer housing II, and is secured to the walls i and J of the cabinet; the front edge of the housing is secured at the front .of the cabinet to the front wall I by any conventional means such as'welding or the like. 28

The side edges I being inturned at right angles to the housing and secured to the inner walls of the cabinet by any suitable means such as electric spot welding. The outer housing 49 ter-' minates at the junction 52 of the insulation 41 and 48. The side walls of the food chamber are provided in spaced apart relation to the side walls of the cabinet, and the ceiling 38 is also in spaced apart relation to the top 9 of the cabinet, and as above stated, with the exception of the front opening and L shaped removable insulation 48. The food chamber is provided with a conventional typeinsulation completely surrounding the same.

It should be further noted that the outer hous- 48 inplace, the said retainer plate being secured at its upper portion by the'fiange I9 and by any suitable means such as screws, etc. (not shown).

The lower portion of plate 54 is secured to the outer housing 49 by screws 60. or. similar means. A downwardly curved directional baflle 56 is .secured at its upper portion to an angle member 51, one leg of .the angle member being secured to the outer housing 49 by any conventional means such as screwsinot shown), the curved baffle member terminates approximately midwayv between the outer housing 49 and the base II.

The said curved baflle member opposite the wall is provided-with a bend 51a. inwardly directed,

and forms a perpendicular baffle wall 58, which is provided with conventional insulation 59. The wall 58 is again bent at right angles and directed toward wall I of the cabinet, and continues as a baffle wall 55 and in parallel relation to the curved portion 56, terminating at an inner wall 6|.

The said inner wall BI is in spaced relation to the side wall I of the cabinet, being secured at one end. to the flange I5. The said inner wall 6| continues for a distance and toward the front of the cabinet, beyond the junction of the connection of wall 55, at which point it is bent at right angles forming a bafile wall 63 terminating at the wall 58, and secured thereto, thus forming a box like housing. The baille wall 63 continues upwardly and rearwardly, and in spaced relation to.

the baffle 58 and the housing 49 terminating in a radius 61 adjacent the radius- 93 and conforming thereto and in spaced relation therewith. From a line opposite the terminus'of the baflle 56, insulation 68a of any conventional type is secured to the upper side of the wall 63 and terminates at or near the radius terminal 61. Ari opening 68 is provided in the front portion of the wall 63,

the said opening is provided with adoor 59 and witli hinges II at the lower portion thereof and clamping or detaching means 12 at its upper portion, and is also provided with a handle 13.

A stack member 16 is provided at the rear of the cabinet, the upper portion being formed in a channel shape, the leg 11 terminating adjacent the rear wall I8, and the leg 18 of the channelterminating adjacent the flange I5 of the cabinet wall I.- The wall 16 continues downward and is secured by any suitable means to the terminal 51 of the baflle63.- One leg of the channel continues downwardly to a point slightly below the above mentioned terminal 61, and is then pro-- cabinet, the inclined baffle is again bent at 82 and continues as baflle 84 in a vertical plane, terminating near the upper portion of the base II. A rear bafile plate 85 is formed by bending a continuation of the wall 94' at right angles and directed toward the wall I of the cabinet, therehy forming a rear baflie plate. This plate conan important bearing on the other, and the reasons for the design and construction will become apparent as the description of the intermittent absorption refrigerator system and the location of the various parts progresses.

Referring now to Fig. 3 and Fig. 4, it is deemed advisable to describe in detail and at some length the design and construction of the refrigerating unit per se.

It will be noted upon examination of Fig. 3, that it illustrates a complete intermittent absorption refrigerating unit, with the exception of the heating means and a brine tank.

The refrigerating unit comprises a generator absorber IN, and is preferably arranged in a horizontal and parallel relation to the major por tion of the unit, however, the said generator absorber may be placed in various positions in relation to the unit, without departing from the scope of the present invention.

The said generator absorber is provided with a depending conduit I02 which is provided with a bend I03, and forms a series of horizontally spaced apart circulatory coils I04, the other end of which terminates in the form of a U shaped loop I05, and terminating in an up leg I06 which is in open communication with the said generator absorber. A main supply conduit I0! is secured to and in open communication with an upper portion of the generator absorber, and continues upwardly and forming an inverted U portion I09, returning downwardly and terminating in a trap I09. A second supply conduit III' is in open communication with the trap I09 and terminates in a rectifier H2 and near the upper portion thereof, a rectifier return con-- duit I I3 is secured to and in open communication with the lower portion of the rectifier H2 and in open communication with the trap I09, a third supply conduit I I4 is in open communication and secured to the rectifier and terminating in an trap H9. One leg III of the trap terminates in,

a, condenser receiver I22 and is in open communication and secured thereto, the leg IIB continues into a horizontal series of spaced apart coils I23 preferably in an inclined relation to the base of the unit, after which the coils terminate into the condenser receiver and are se-- cured and in open communication therewith.

A return conduit I24 having its upper end in open communication and secured to the header H5 and the lower end terminating in a leg of the U shaped generator absorber circulatory coil trap I05 and in open communication therewith and secured thereto.

It will be noted that the circulatory coil- I54 for the generator absorber is provided with spaced apart heat conducting fins I25 and preferably provided with a metal alloy of low resistance to a slidable rail means for supporting the said unit.

It should also be noted that the condenser circulatory coils I23 are provided with 'heat exchange fins I23, and it should be further-noted that a portion of the coils are supported on the angle member I21. k

A trap return conduit I3I having its upper end in fluid communication withtrap I and secured thereto, the lower end of said conduit terminating ina dome member I32. Another conduit 133 is also in open communication with the said dome member projecting thru the lower portion of the tion wall 43 of the food compartment.

generator absorber and terminating in a U shaped trap I34, having the other leg I35 secured to and in open communication with the said generator absorber.

Depending from and in open communication with the evaporator IIS are supply conduits I35 and I31. It will be noted that the conduit I31 is of greater diameter than conduit 'I35-for the purpose of providing therein a drain backconduit I38 which projects upwardly andthrough the evaporator, after which it forms an inverted .U shaped member I39, the lower .end .of the said drainl back conduit terminating in the dome sec- Secured to and in open communication with the supply conduits I36 and I31 are freezing coils I39, I40, and I. It will be noted that the said freezing coils project outwardly from the supply conduits in a' horizontal plane, audit will be .further noted that the freezing coils are formed in U shape.

A closure plate I42 is provided thru which the freezing coils project, and is located in spaced apart relation to the supply conduits. It will be noted that the closure plate is provided with an ofiset edge portion I43, the said closure plate ofl'set portion being provided with spaced apart holes I44, The said holes being so arranged to.

register with the holes 40 provided in the rear I A gasket I of'insulating material is provided portion of the closure plate, and is provided with spaced apart holes therein the holes I44 of the said pla The insulated L shaped block 43 which was referred to earlier in tained therein the evaporator, supply conduits and'a portion of the freezing coils. This insulation block is so formed that it compietel'y fllls the space unoccupied by the insulation 41, and is removable as a unit with the evaporator supply legs and freezingcoils of the system. It should further be noted that the closure plate I42 Cabuts' a portion of the front face of the said insulating block, and the ofl'set portion I43 is 'imbedded in the insulation block, thereby providing emcient the control mechanism I'55.

for the oifset which register with this specification, hereon having the bottom insulation around and at the rear of the said closure plate,

Bolts I45 are inserted thru the closure plate holes and also thru the holes 40in the rear wall .of the food chamber, the gasket I45 sealing the contacting parts thereof, and bolts I46 securely holding" the closure plate in position.

The chamber walls 65 provide a space and house-a fuel oil burner I5I or similar heating device suchas a gas burner or the like. The said fuel oil'burner is preferably of the conventional type, being moimted on a fuel supply conduit I52-which is secured to the base II by securing means I53 and I54. It will be noted that the fuel supply conduit forms a semi-reservoir, the operation of which will be described later.

A fuel control mechanism I55 is associated with a conventional overflow valve mechanism I56, theoutlet. of which is in fluid communication with the reservoir I52. A fuel tank I51 is provided with a fuel conduit between the said tank and (The conduit is not shown.)

It will now be seen from the above description that the refrigerator cabinet is provided with several compartments, fines and air flow insulation means, and so arranged that each compartment, flue and air flow insulation means provide space and-air flow for the efficient operation of the present invention relating to an air cooled intermittent absorption refrigerating system.

, As has been stated, the refrigeration unit as illustrated m l 'ig. 3 is supported on angle iron members I21 and it should be further noted that the said angle iron members are so spaced as to are placed in their respective positions, including the generator absorber, circulatory coils therefore, the various conduits associated with the generator absorber, the rectifier, evaporator condenser and coils therefore, the supply legs and freezing coils, closure plate therefore and the insulation surrounding the evaporator, supply legsa nd a portion of the freezing coils. In the present system all assembly connections are welded, usingany of the conventional welding methods. As above stated, the entire unit is supported upona base comprising angle iron portions, and the unit rigidly secured thereto by means of supports.

Before P acing the unit in the cabinet, the

bal'lle wall- 53, together with the baflle wall 58 and .wall 55 are placed over the generator absorber.

The stack member 15 including the inclined baflle portion II and rear baiiie wall 85 are next placed in position over the circulatory coils I04 and I23.

the cabinet. cured in place as illustrated in Fig. 11. It will now-be noted that a compartment A is formed, in which is located the fuel supply tank I51, conduitsand fuel control mechanism I55 and I56.

Compartment B, Fig. 12 contains the generator absorber completely housed on all sides, and

portion thereof open, permitting air to be drawn therethrough by means or Ithe heat applied to the generator absorber.

The entire unit including the housings and stack, 1 're moved inwardly and in slidable relation with the portion of the cabinet to position in The directional baffle is then se- The upper portion of the chamber B is provided with the flue member baiile wall 63. It will be noted that the baffle wall 55 terminates below the bafiie wall 63, providing an opening C therebetween, through which the heat from chamber B may pass into and naturally upwardly into compartment D and through stack E. The heat in its movement drawing air through the circulatory coils for cooling the same. The compartment 1) having an open bottom portion.

The rear bafile wall 85 being in spaced apart relation with ,the wall 55 provides an air space therebetween through which air isdrawn, thus producing air insulation means, and thus preventing heat transfer from compartment 13 to compartment D.

The rectifier H2 is placed incompartment F, Fig. 13 which is formed by the wall of the flue member I6, the back wall I8 and the side wall 6 of the cabinet. The bottom portion of the said compartment F is formed by the inclined balile BI which directs the heat from the circulatory coils into the flue E, the bottom portion beyond the said coils being open to the atmosphere. The

object of placing the rectifier II! in a separate and cool flue portion is to prevent the heat from the burner supplying heat to the generator absorber from effecting the dehydrating of the vapor in the said rectifier, and provides for more efficient cooling of the same.

The passage H provides a flue through which cool air is drawn, and thereby forms an efilcient insulating means between the mechanism of the unit and the food .chamber. i

A flue cover member I 59 being formed of a mesh screen I6I or similar material and provides a housing over the flue E, F and H, the purpose of the said cover is for the exterior styling and performs no part in the operation of the system.

A modification of the condenser and cooling coils therefore is illustrated in Fig.16 and Fig. 17. The modification as applied to the present invention includes a series of condenser coils I62 and I63, and is provided with heat transfer fins I64 of material having low heat resisting qualities. The said coils are inclined downwardly with respect to eachother, providing means for gravitational flow through the said coils, the end I65 of the said coil terminates in a sump I66 or depressed portion ofa condenser receiver I61. It

will be noted that the inclination of the condenser coils isllmited to a slight angle from the horizontal thereby providing a slow down grade which the condensed vapor will travel to the receiver I61.

Although the function and operation of the present invention'will be understood y those skilled in the art, and could be simply described as an intermittent absorption refrigerating system of the 1--3-,2 type it is believed best to now fully describe the function and operation of the said' invention, in order to more especially point out the important mechanisms and also to clearly describe the modifications as illustrated in Fig.

17 and Fig. 18.

In the operation of the present invention heat is applied to the generator absorber in which is' contained a bi-fiuid preferably ammonia water solution. The ammonia is driven off from the water by means of the applied heat of the burner, in the form of ammonia vapor, in which and at times is contained a relatively small amount of water, the vapor passes up through the conduits into the trap,-and then to the rectifier wherein any water contained in the vapor is separated in the rectifier, the water' returning to the trap and a the vapor conveyed to the evaporator filling the the system is reduced,.the condensed vapor, now

a liquid is forced back through the condenser conduit and empties into the evaporator, filling the same with a. strong solution of ammoniacal liquor. The refrigerating cycle now .starts to function. The liquor inthe evaporator obviously fills the supply conduit and the freezing coils. During the refrigerating cycle the heat in the food chamber is absorbed by the liquor in the freezing coils and boiling therein, and boiled of! vapor returns to the remaining water in the circulatory coils and the absorber. The water having a high afllnity for ammonia quickly absorbs the vapor and in this absorption action forces a circulation through the circulatory coils back to the absorber. During the generating cycle a small amount of water will carry over into the evaporator, and obviously locates near the bottom of the supply conduits and freezing coils. If this water is permitted to buildup in the freezing coils and supply conduits, the system will become ineffective, therefore a drain back conduit is provided. The said drain back occurs during the early portion of thegenerating cycle, and the method used and mechanism therefore is fully described and covered inU. S. Patent No. 2,092,733 issued September '7,- 1937, to Edward Gruber and-assigned to Allyne Laboratories, Inc.

The modification of the condenser as illus-- trated in Fig. 17 and Fig. 18 'provides for a receiver below the condenser coils, i. e., the vapor is condensed before reaching the condenser. receiver, the vapor and liquid circulating only through the coils before reaching the said receiver, thereafter remaining in the receiver and ed to the balance of the system by conduits, the

said evaporator and supply legs being completely enclosed in an L shaped insulating casing, the freezing conduits being inserted into the food chamber-thru the opening therein and the metallic plate forming a closure for the opening in the rear wall and rigidly secured thereto.

2. In an intermittent refrigerating system including a generatorabsorber, a rectifienan evaporator, conduits depending therefrom and horizontal freezinggcoils secured; to said conduits and a condenser, all connectedin operative relation;

chamber, .the

the generator absorber and condenser being located at the base of the unit with the condenser positioned at a lower level than the said generator absorber, the evaporator being located at the top of the unit and the rectifier intermediate the evaporator and generator absorber, the whole assembled refrigerating system being removably secured to and in a refrigerator cabinet.

3. In a refrigerating cabinet, having a food chamber, insulation surrounding the said chamber, a mechanism compartment at the rear of said chamber and a mechanism compartment under the chamber, an opening in the rear wall of the food chamber, refrigerating mechanism including a generator absorber, rectifier, evaporator and condenser operatively associated by means of conduits, depending conduits from said evaporator, and horizontal freezing coils secured to said depending conduits, a closure plate of greater dimensions than the opening in the food chamber, the freezing coils projecting thru said plate and secured thereto, an insulated casing completely enclosing the evaporator and depending conduits, the entire refrigerating mechanism being movable as a unit in operative position into the mechanism compartments and the food closure plate being secured to the rear wall of the food chamber adjoining the opening therein and thereby supporting the freezing coils and depending conduits thereto, the evaporator being supported in the compartment above the chamber the remainder of the system being supported by the generator absorber and condense'r, the latter being located in the mechanism compartment below the chamber.

4. In an intermittent absorption refrigerating system, including, a generator absorber, horizontal spaced apart circulatory coils in open communication with the said generator absorber, a

rectifier, an evaporator having depending conduits therefrom and horizontal freezing coils se- I cured to the said conduits, a condenser located adjacent the generator absorber and connected by conduit to the evaporator, horizontal spaced apart cooling coils below and in open communication with the said condenser, the said condenser coils being located below and in spaced apart relation to the generator absorber circulatory coils, the said generator circulatory coils thereby being located in position to induce air flow through the condenser circulatory coils, and

the entire refrigerating unit being removably secured to and in a refrigerator cabinet.

5. A refrigerator cabinet, having a food chamber therein, a mechanism compartment at the rear of the food chamber, and a mechanism compartment below the food chamber, refrigerating mechanism including. a generator absorber, a rectifier, an-evaporator, and a condenser all operatively associated by means ofconduits, the evaporator being provided with depending legs and horizontal freezing coils secured to said legs, an opening in the rear wall of the food chamber through which the freezing coils enter the food chamber and means for securing the freezing coils to the said rear wall of the food chamber, and horizontal spaced apart circulating coils associated with the generator absorber, horizontal spaced apart circulating coils associated with the said condenser and located below the same, the said condenser coils being mounted below the said generator absorber coils, and the said refrigerating mechanism forming an integral unit 'removably' secured to and associated with the cabinet and the several mechanism compartments, and all'connected in operative relation.

8. In a refrigerating cabinet having a food compartment, an opening in the rear wall of the compartment, refrigerator mechanism of the absorption type, including a generator absorber, an evaporator and a condenser, all connected in operative relation, the said evaporator having depending supply legs, and horizontal freezing coils secured to said legs, a closure plate through which the freezing coils'project, and to which the said coils are secured, the said plate being larger than the opening in the rearwall of the cabinet, and means for securing the said plate to the rear wall of the food compartment, the entire refrigerator mechanism being removable from said refrigerating cabinet as a unit.

7. In a refrigerating cabinet having a food compartment, an opening in the rear wall of the compartment, refrigerator mechanism of the absorption type, including a generator absorber, an evaporator and a condenser, all connected in operative relation, the said evaporator having depending supply legs, heat insulating material surrounding said evaporator and supply legs, and horizontal freezing coils secured to said legs. a closure plate through which the freezing coils project, and to which the said coils are secured.

the said plate being larger than the opening in the rear wall of the cabinet, and means for securing the'said plate to the rear wall of the food compartment, the entire refrigerator.mechanism being removable from said refrigerating cabinet as a unit.

8. In a refrigerating cabinet having" a food compartment, an opening in the rear wall of the compartment, refrigerator mechanism of the absorption type, including a generator absorber, an evaporator and a condenser, all connected in operative relation, the said evaporator having depending supply legs, heat insulating material encasing the said evaporator and depending supply legs, spaced horizontal freezing loops communicating with said legs and extending outwardly therefrom, a closure plate through which the freezing coils project, and to which the said coils are secured, the said plate being larger than the opening in the rear wall of the cabinet, and

' means for securing the said plate to the rear wall of the food compartment, the entire refrigerator

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