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Cet.. 8, 1946. H. E. RosEBRooK 2,409,069 REFRIGERATOR Filed Jun'e 12“, 1941 2 -sheets-sheet 1 /0 /// /3 INVENTOR. HOME/F ¿î FOSEÖ’E’OO/ë Get. 8, 1946. 2,409,069 H. E. ROSEBROOK REFRIGERATOR Filed June l2, 1941 2 Sheets-Sheet 2 . ` INVENTOR. few/5@ E @oaf-@Fang Patented ‘Jet 8, 1945 ¿ragots UiD SATàÈES PATENT OFFICE REFRIGERATOR Homer E. Rosebrook, Greenville, Mich.,y assigner, by mesn'e assignments, to Gibson Refrigerator Company, Greenville, Mich., a corporation of Michigan 1 Application .l une 12, 1941, Serial No. 397,684) 7 Claims. (Cl. (i2-_89) This invention relates to refrigerators, and more particularly to the provision of auxiliary com partments within such refrigerators for the stor age of butter and other foodstuiîs which it is de sired to maintain at a temperature higher than that of the remainder of the articles stored with in the refrigerator. The temperature nor-:many maintained within the main food storage compartment of a refriger ator is so low that butter kept at that tempera ture Wili not spread easily. Butter and similar foodstufi‘s, however, can be properly preserved at temperatures somewhat higher than those pre vailing in the main compartment. Hence, it is desirable to provide inthe refrigerator cabinet auxiliary compartment which can be kept at a higher Itemperature than that of the main compartment, yet sufficiently low to preserve but ter and the like. Accordingly, the principal object oi this in vention is to provide in a refrigerator an aux» iliary insulated compartment for the storage of butter and similar foodstuffs. A further object is to provide novel-means for 2 Figure 7 is a fragmentary cross-sectional View taken on substantially the line 'l-l of Figure 5. The invention is shown as embodied in a con ventional household refrigerator, shown in Fig ure 1. The refrigerator comprises a cabinet hav ing an outer casing l0. Within the outer casing lo and spaced therefrom is a liner H defining a main refrigerated food storage compartment. Insulation 24 is packed between the liner H and the outer casing l0. The main compartment‘is provided with a door l2. Within the main com partment is an evaporator I3 for cooling the main compartment. Shelvesv Mare provided for hold ing articles to be stored within the refrigerator; ïn the bottom of the refrigerator’cabinet is a machinery compartment having an» access door I5. The machinery compartment-contains a part of the refrigeration> apparatus which may be of any conventional type. A condenser I1, »Which-is connected to, and» forms a part of the refriger ating system“, is mounted in an upright-position in the rear' of the back wall of the cabinet. »The condenser may comprise a continuous coilV of tubing, such as that shown. A ñue le, open at its upper and lower ends, enclose's the condenser Il and is secured to the back of the cabinet l0. Located within the main compartment is a conducting heat to the auxiliary compartment whereby to maintain it at a temperature higher than that of the main compartment. Another object of the invention is to improve housing IB forming an auxiliary compartment. the eiiiciency of the refrigeration system of re The housing I8 comprises'a shell I9 having an frigerators provided with such auxiliary com 30 access» opening therein which is closed'by closure partments. 2i).V TheY closure 20 is hinged to the shell I9 by Another object is to provide a combi-ned heat hinges 2l positioned adjacent to- the lower edge transfer means andsupport for an auxiliary com thereof. Both the shell and the closure are pref partment. erably formed from a suitable plastic material These and other objects ancillary vthereto will which is to a,>A certain extent an insulating'ma more fully appear in the following speciiication, terial, 4That is, the plastic material has a col'whenread in connection with the accompanying efficient of heat'transfer lower than those of the drawings, wherein: » variousV metals", but higher than those'm'ate'i‘i'als Figure 1 is a iront elevational view of a re which are commonly called insulating materials. frigerator of the household type embodying the 40 Thus, when thetemperature Within the auxiliary invention, the door of the refrigerator being open compartment is higher than that within the main to show the interior thereof; compartment, there will be a relatively slow Figure 2 is a fragmentary front elevational transfer of heat from the auxiliary compartment View on an enlarged scale of the auxiliary com to the main compartment through thev walls sur partment; rounding’ the former. Figure 3 is a fragmentary cross-sectional view taken on substantially the line 3_3 of Fig ure 2; Figure ¿l is a fragmentary cross-sectional View taken ony substantially the line â--f~i of Figure 2; Figure 5 is a fragmentary iront elevational view of a modified form of the invention; Figure 6 is a fragmentary cross-sectional View mounted’on the back wall‘of the liner H by means of a U-shap‘ed metal bar 22. The base of the U is located outside of the outer wall of the cabinet and is preferably in directcontact with a portion of the condenser' Il. The legs of the taken on substantially the line â--â‘ of Figure 5; and` Y The sneu le of the, auxiliary compartment is Y U extend'through the back walls of the casing l0 and the liner Ii and into housing i8". The legs of the U are secured to the side walls of thev 55 shell lâbyscrewsìä; In order to'prevent direct 2,409,069 3 contact and consequent conduction of heat from the bar 22 to the liner Il, rubber grommets 25 are interposed between them. The grommets also seal the holes in the liner through which the bar 22 passes, thereby preventing the escape of mois ture into the insulation 24. The auxiliary compartment is cooled by the evaporator I3, The auxiliary compartment can 4 scribed construction, a portion of the heat from the condenser I1' is utilized to evaporate the liquid refrigerant in the coil 55, hence there is no appreciable loss in efficiency of the entire re frigerator. From the foregoing it will be seen that the in vention provides an auxiliary compartment which can be maintained at temperatures above those within the main food storage compartment cause it is constantly being warmed by heat from l0 whereby butter and other foodstuffs can be prop erly preserved, without causing an appreciable outside the cabinet conducted through the bar loss in the efficiency of the refrigerator as a whole. 22. The air within the auxiliary compartment Furthermore, in the modification shown in Fig will absorb this heat and thereby maintain the ures 1 to 4 the U-shaped bar which forms the heat temperature of the auxiliary compartment above transfer medium, also provides the sole support that of the main compartment. not become as cold as the main compartment be Since the arrangement just described conducts heat from the exterior of the refrigerator into the interior thereof, it would be expected to cause a slight decrease in the eiìciency of the refrig erator. This loss, however, will be offset to a con- ~. siderable extent by absorbing the heat from the condenser I1. Since the condenser I1 has to be cooled and the bar 22 is to be heated, arranging them in heat exchange relation increases the effi ciency of the condenser. This arrangement is much superior to an arrangement wherein the heat transfer means is exposed only to the air outside the refrigerator because the heat loss in that case is an absolute Waste. for the auxiliary compartment. The scope of the invention is indicated in the appended claims. I claim: 1. A refrigerator including, in combination, a cabinet formed to provide a main refrigerated compartment, a housing in said main compart ment defining an auxiliary compartment, the walls of said housing being formed of relatively poor heat conducting material, means for re frigerating said main compartment including a condenser located outside of said main compart ment, and heat transfer means for maintaining the temperature within said auxiliary compart Figures 5 to ’7 show a somewhat modified form 20 ment above that within the main compartment, said heat transfer means having a portion in of the invention. The housing which forms the heat exchange relation with said condenser and auxiliary compartment in this modification is designated by the reference numeral 55. The refrigerator in which the housing 50 is mounted may be the same as that previously described. It ,v comprises an outer casing I0^ and a liner Il' with insulation 24' between them. At the back of the refrigerator is a condenser I1' partially surrounded by a flue I6’. The housing 5D comprises an outer shell 5| and a hinged closure 52. Preferably the shell and clo sure are made from a plastic the same as that in the previously described construction. The shell 5I of the housing 50 is secured in any suitable manner, preferably by screws 53, to the back wall of the liner Il’ of the refrigerator cabinet. In this modification of the invention the heat transfer means is a closed refrigerant circuit- It comprises a continuous coil of hollow tubing 55 which is looped back and forth Within the shell 5I and extends through the back Walls of the liner Il’ and the casing IB’ of the refrigerator cabinet. The portion outside of the cabinet is bent into the shape shown in Figures 5 to 7, and another portion in heat exchange relation with said auxiliary compartment, said last named por tion being substantially insulated from said main refrigerated compartment. 2. A refrigerator as defined in claim l wherein said heat transfer means comprises a closed re frigerant circuit containing a volatile refrigerant. 3. A refrigerator comprising, in combination, a cabinet formed to provide a main refrigerated compartment, a housing in said main compart ment defining an auxiliary compartment, the walls of said housing being formed of relatively poor heat conducting material, and heat transfer means for maintaining the temperature within said auxiliary compartment above that within the main compartment, said heat transfer means comprising a closed refrigerant circuit having a condenser portion in heat exchange relation with said auxiliary compartment and an evaporator portion located outside of the cabinet and in heat exchange relation to the air outside of the cabinet, said condenser portion being substan tially insulated from said main refrigerated com partment. with the condenser l1'. 4. A refrigerator comprising, in combination, The tubular refrigerant circuit 55 is partially a cabinet formed to provide a main refrigerated filled with a suitable volatile refrigerant. The compartment, a housing in said main compart quantity of refrigerant employed within the coil is such that at the temperatures prevailing with Si) ment defining an auxiliary compartment, heat transfer means for transferring heat to the air in the auxiliary compartment a portion of the Within the auxiliary compartment to maintain refrigerant is liquiiied. Liquid refrigerant collects it at a temperature above that within the main in the bottom part of the coil and in the lower compartment, said heat transfer means compris most loop of the coil outside of the refrigerator. Here it absorbs heat from the condenser I1' and ii 5 ing a closed refrigerating circuit containing a volatile refrigerant and having a condenser por is evaporated, The gaseous refrigerant then tion within said auxiliary compartment and the passes back into the auxiliary compartment evaporator portion outside of said refrigerated where it gives up its heat and is again liquiiied. compartment, said condenser portion being sub Thus it will be seen that the refrigerant circuit 55 is in effect a closed system wherein the evapo 70 stantially insulated from said main refrigerated compartment. rator is that portion outside the refrigerator and 5. A refrigerator as defined in claim 4 wherein in contact with the condenser 56 and wherein said closed refrigerating circuit comprises a con the condenser of circuit 55 is that portion within tinuous tube containing a volatile refrigerant. the auxiliary compartment. 6. In a refrigerator cabinet having a refrig In this modification, as in the previously de 75 is arranged so that a portion thereof is in contact . ¿409,069 „ 5 erated compartment and a food storage recep tacle within said compartment, means including a hermetically sealed container partially ñlled with a vaporizable liquid for transferring heat from a suitable source thereof to the interior of said receptacle. 7. In a refrigerator cabinet having a food stor age compartment, a refrigerant circulating sys 6 tem for providing refrigeration in said comparta ment, and a food storage receptacle within said refrigerated compartment, means including a hermetically sealed container partially filled with a vaporizable liquid for transferring heat from a portion of said system to the interior of said receptacle. HOMER ROSEBROO'K.