Nov. 19, 1946. 2,411,461 L. A. PHlLlPP REFaIeBRuim APPARATUS Filed Dec. 10, 1942 2 Sheets-$11561, 1 " 39 ' 60. J0 32 86 lNV?vmR. Lama“. 41. ‘Pun-0n BY ' Nov. 19‘ 11946. L. A. PHILIPP 2,41 1,461 REFRIGERATING APPARATUS Filed Dec. 10, 1942 2 Sheets-Sheet 2 r _uI‘l . . .. vl ._ TN.- KNMK v. j,.1 _.-I|l1!‘i' 4.‘ 1 . =4 a ,w I‘ INVENTOR.‘ Lamar!“ I1. Pmuwr' Patented Nov. 19, 1946 ’ 2,411,461? UNITED STATES PATENT. OFFICE _ REFRIGERATING APPARATUS Lawrence A. Philipp, Detroit, Mich., assignor to Nash-Kelvinator Corporation, Detroit, Mich, a corporation of Maryland ‘ Application December 10, 1942, Serial hlo. 468,487, 8 Claims. “1' 62-89) 2 This invention relates to refrigerating appa- ' ratus. - rator 38 is secured to the exterior‘ wall of the - I liner 22 and extends across a portion of the rear 7 One of the objects of my invention is to pro vide an improved arrangement in a multiple wall and the bottom .wall of the liner. The evaporator 38 is utilized for cooling a portion of temperature refrigerator for maintaining the cabinet insulation free of moisture. the food storage compartment 38 by absorbing heat through the walls of the liner. The evapo rator 36 is positioned in the upper portion of the Another object of my invention is to provide in a refrigerator a low temperature'evaporator food storage compartment and is utilized for and ‘a relatively high temperature evaporator, which higher temperature evaporator is located adjacent theinsu'lation of the refrigerator, and - freezing substances and for cooling circulating to arrange said insulation in such a manner that there is a space for water vapor diffusion Located in the machine compartment 32 is a from moisture collected on ‘said high tempera ture evaporator to said low temperaturelevapo rator. air in the upper portion of the food storage com partment 36. ' refrigerant condensing unit 46. The condensing unit includes a motor compressor unit 42 which 15 compresses refrigerant and delivers it to a 'con- ‘ denser 46 wherein it is liqui?ed and from which Further objects and advantages of the present , ’ it is delivered to the evaporator 36 through-a invention will be apparent from the following small diameter conduit 56. This small diameter description, reference being had to the accom~ conduit 58 controls the ?ow of refrigerant ?owing panying drawings, wherein a preferred form of 20 to evaporator 36 by metering the correct amount , of liquid refrigerant. Evaporated refrigerant is ' the present invention is clearly shown. In the drawings: withdrawn from evaporator 36 to the condensing unit through conduit 5|. ' Fig. 1 is a view in elevation and partly broken. away of a refrigerator embodying features of m In addition to the evaporators 36 and 3.8, a third evaporator 52, is provided for condensing invention; evaporated refrigerant from the evaporator 38. Fig. 2 is a view taken along line 2-1-2 of Fig. 1; F1Fig. 3 is a view taken along thev line 3-3 of Fig. 4 is a view taken‘ along the line Fig. 2 ; of ; ' Fig. 5 is a view taken along theline 5-5 of Fig. ‘2; and ‘ _ g ' Fig. 6 is a fragmentary view in perspective showing a channel member embodying features of my invention. ' ' ‘ _ The evaporator. 52 is positioned in the insula-. tion' between the inner casing‘ and outer casing and is coiled about a tank 64, which tank iscon 'nected to the evaporator 38 in such a manner_ that both ends of theevaporator 38 are in open communication with the interior of the tank 66. Liquid refrigerant passing through, the small di ameter conduit 50 ?rst passes to the evaporator 62 whereit is in good heat exchange relation Referring to the drawings, the numeral 26 designates, in general, a refrigerator cabinet with the tank 54 to condense any evaporated re bin 35. ing point of water at least part of the time. frigerant contained in the tank 54. ‘The liquid refrigerant then passes through evaporator 52 having an inner metallic liner 22 and an outer into conduit 60 whence it ?ows into the primary metallic casing 24.. Interposed between the in ner liner 22 and the outer casing 2t is insula 40 evaporator 36. Preferably, the'evaporator 36 is of the so-called ?ooded'type and operates below tion 21. The inner liner 22 forms walls of food the freezing point of water during operation of storage compartment 36. In the lower portion the condensing‘. unit. The high temperature of the cabinet is provided a machine compart evaporator 38 is utilized for cooling the lower ment 32. The front part of the food storage compartment is closed by door 33 and the front - portion of the food storage compartment through the walls of the liner, and preferably this evapo~ " part of the machine compartment‘ 321s closed rator operates at a temperature above the freez by door 34 which carries a movable vegetable - ' The-refrigerator herein disclosed is of the mul Within the food storage compartment there tiple temperature type and includes an ice 50 are provided glass shelves 64, 66 and 68. ‘These making evaporator 36 of a primary refrigerating shelves are horizontallyrpositloned in the food system positioned in the food storage compart storage compartment and extend from the front ‘ ment 38, and also includes a relatively high tem of the cabinet to a point-adjacent the rear wall perature evaporator 38 which forms a part of a of the liner. As will be noted, the shelves are secondary ' refrigerating system. The evapo 55 slightly spaced from the rear wall of the linerv _ 9,411,401 , so as to permit a slight circulation of air along ‘ 4 ' v , it has been found that insulation as originally in stalled in the refrigerator contains some moisture the rear wall of the liner above and below the glass shelves. Adjacent the front part of the > and after a period of operation in a refrigerator, ‘ as herein disclosed, the actual moisture content of _ the insulation was less than when originally in- - ‘ _ food storage compartment and at the lower por tion thereof, I have provided glass doors 12, which doors cooperate vwith the bottom -wall of the ' liner and glass shelf 66 to provide-for enclosing 'a high humidity compartment which is‘ refrig erated by evaporator 38. . Any suitable form of insulation maybe uti lized between the inner liner and outer casing. ‘ such, for example, as cork herein shown,-or other serted in the refrigerator. It will, therefore, be noted that in my improved refrigerator the in sulation remains dry although multiple tempera tures are maintained and liner cooling forms a 1.0 part of the refrigerator. Further details of the cabinet construction and ' refrigerant primary and secondary systems here ' well known insulating materials, such, for ex-> in disclosed and the operation of said systems, to- ' ample, as vcorrugated paper, “rock wool’? or other iibrous material, as desired. , v In refrigerators of the type herein disclosed gethei' withthe air flow in the cabinet, are more 15 specifically described in my Patent No. 2,361,792, issued October 31, 1944, for'Refrigerating ap paratus, of which the present application is an tendency to collect moisture on the refrigerant improvement and has provisions for venting thev ~ evaporators positioned between the inner liner , - insulation between the high and low tempera ' and outer casing and on the exterior walls of the 20 ture evaporators whereby moisture is allowed to lining-member, and in the absence of some pro di?use in the air and pass to the low tempera- _ ture evaporator. ‘ visions for disposing of such moisture the in sulation becomes wetted and loses its insulat Although only a preferred form of the inven-v . ing qualities. In order to overcome this obiec- , - tion has been illustrated, and that form described 8 tion, I have providedin the insulation immedi 25 in detail, it will be apparent to those skilled in wherein liner cooling is employed, there is a . ately below the bottom wall of the liner, chan - the art that various modi?cations may be made nels ‘II and in_ the insulation extending‘ up the rear wall of'the liner I have provided channels 80. These channels are adjacent the evaporator therein without departing from the spirit of the invention or from the scope of the claims. appended ' ' i 38 and each channel 80 is in open ‘communica 30 Iclaim: ' tion with a channel 18. Also, in the upper por 1. Refrigerating apparatus comprising a cabi- . tion of the cabinet I haveprovided metallic chan net having an inner liner andanouter casing, nel members 82 which are in open communica insulation between said liner and easing, said tion with the channels 80. These metallic chan [liner forming walls of a food storage‘ compart nel members-are utilized in connection with in sulation, herein denoted as 88, as the insulation. '86 is adapted to be removed from the cabinet in ‘ment, a refrigerant evaporator positioned in said food compartment and being adapted vto operate at a relatively low temperature, and a refrigerant the event it is desired to remove the evaporator evaporator positioned on the exterior surface of ' 38 therefrom. In such case it may be desirable said liner and being adapted to operate at ‘a rela to utilize insulation atthis particular place of the 40 tively high temperature and above the freezing typewhich may be loose ?brous material since it may be readily removed and inserted about the point of water at least part of the time, said in~ _ sulation being spaced from said evaporator posi- , _ channel members 82 and the evaporator 52. A re- - tioned on said liner and said liner having an movable panel 90 is provided at the rear of the opening in a wall thereof communicating ‘with insulation 86v and an opening 92 is provided in ' the space between the insulation and liner to the liner 22. This opening will permit the re establish a communication path between said , moval of the evaporator 36 through the rear wall evaporators to allow-for water vapor diffusion in ' of the cabinet without disconnecting the-refriger air from the moisture collected on the relatively ant conduits associated therewith. The opening‘ high temperature evaporator to ?ow to the rela 92 is partially closed by cover panel 98; which is ‘secured to the liner“ by studs 100. It is noted that this cover panel 98 is spaced from the inner tively low temperature evaporator. ' 2. Refrigerating apparatus comprising a cabi net having an inner liner and an outer casing, ' liner 22 so as to allow a passage 99 between the insulation between ‘said liner and-casing, said food storage compartment and the insulation on liner forming walls of a food storage compart the exterior of the side of the liner 22. It willalso be noted that the opening 92 is adjacent the ment, a refrigerant evaporator positioned in said food compartment ‘and being adapted to operate ‘channel members 82 whereby a passageway is at a relatively low temperature‘, and a refriger provided from the interior of the food storage _ ‘ compartment through the space 99 between the ant evaporator positioned- on the exterior surface of said liner and being adapted to operate at a liner 2-2 and cover plate 98 and through the spaces relatively high temperature and above the freez provided by channel members 82 and channels 60 ing point of water at least part of the time, said 80 and 18. Consequently, there is a- complete insulation being channelled adjacent said evap ' - passage open between the evaporator 38 and the, orator positioned on said liner and-said liner evaporator 38. ‘By this arrangement water vapor ‘having an opening in a wall thereof communidiil'usion in air permits the moisture collecting 65 eating with the channelled space betweenthe in- on the ‘rear side of a liner member and on the sulation and liner to establish a communication evaporator 88 to move by diffusion through-the passageways ‘I8, 80 and 99 and into the interior of the food storage compartment where the mois ture contacts the- low temperature evaporator 38 70 and is frozen out thereon. Thus, moisture does not '“collect between the inner liner and outer casing to such an‘ extent that the insulation would become wetted and ‘lose its insulating charac teristics.‘ In actual test of such an arrangement; 75 _ path between said evaporators to allow for water vapor diffusion in air from the moisture col lected on. the relatively high temperature-evap orator to. ?ow to the relatively low temperature evaporator. _ ‘ ~ 3. Refrigeratingapparatus comprising a cabi- net, a liner for said cabinet, said liner having an opening, a relatively low temperature evaporator positioned in said cabinet on the interior side of 2,411,461 said liner, a relatively high temperature evapora net having a liner forming walls ‘of a food com- ‘ partment and having an opening, a refrigerant - tor positioned in said cabinet on the opposite side ofsaid liner, and insulation positioned in said cabinet adjacent said high temperature evapora tor, said high temperautre evaporator being adapted to operate above the freezing point of water at least a portion of the time and being so positioned as to condense out moisture from the air contacting said insulation and high tem perature evaporator and said insulation including evaporator secured to the exterior rear and bot tom, wail of said liner, a relatively ‘low temper ature evaporator positioned in said food ‘com partment of said cabinet, and insulation posi tioned adjacent said rear‘and. bottom walls of said liner on the exterior side of said liner and being provided with a channelled portion to pro vide a passageway to said opening to provide a a channel to provide ;with said liner opening a path for the passage of vapor from one evaporator vent for water vapor diffusion in, air from mois ture collected on the relatively high temperature to the other. evaporator so that said moisture may ?ow to the ‘ inet having a liner forming walls of a food stor age compartment, a refrigerant evaporator se cured to the exterior rear and bottom walls oi’ relatively low temperature evaporator. 4. Refrigerating apparatus comprising a cabi net having a liner forming walls of a food stor age compartment‘ and having'an opening, a re-_ frigerant evaporator positioned in heat exchange relation with an exterior surface of said liner, a 20 relatively low temperature evaporator in said food storage compartment. of said cabinet and insu > 'l. Refrigerating apparatus comprising a cab- I‘ " said liner, a relatively low temperature evapora tor positioned in said cabinet in ‘the interior of said liner in said compartment, said liner being provided with an opening in its rear wall, and insulation positioned on the exterior of said liner adjacent said rear and bottom walls and being lation channelled to allow a vent along said ex channelled along the rear and bottom walls to terior surface of said liner to said opening to provide a passageway to said opening and between provide a path for the passage of vapor from-one 25 said evaporators. evaporator to the other, ‘ 8. Refrigerating apparatus comprising‘ a cam5. Refrigerating apparatus comprising a cabi net having a linerforming walls of a food stor net having a liner forming walls of the food stor- , age compartment, a secondary refrigerant evap age compartment and having an opening, a re- ' orator secured to the exterior rear and bottom frigerant evaporator secured to the exterior rear 30 walls of said liner, a relatively low temperature surface of said liner, a relatively coldtrefrigerant primary refrigerant evaporator positioned in said evaporator positioned in said food compartment of said cabinet, and‘ insulation positioned adja food storage compartment of said cabinet, said liner being provided with an opening, an insu- _ cent saidv exterior rear surface of said liner and lation positioned on the exterior side of said liner being provided with a channelled portion to allow 35 adjacent said rear and bottom walls of said liner ' a passageway to said opening to provide afpath 7 and being provided with a, channelled portion to for the passage of vapor from one evaporator to provide a ‘passageway to said opening to provide. the other. a communication path between said evaporators. _ _' . ‘ 6. Refrigerating apparatus comprising av cabi LAWRENCE A. RHILIPP.