Патент USA US2410360код для вставки
Patented Oct. 29, 1946 2,410,360 UNITED STATES PATENT OFFICE 2,410,360 REFRIGERATIN G APPARATUS Lawrence A. Philipp, Detroit, Mich, assignor to Nash-Kelvinator Corporation, Detroit, Mich, a corporation of Maryland Application J annary 25, 1945, Serial No. 574,479 8 Claims. (01. 62-126) 1 This invention relates to refrigerating appara tus and, more particularly, to refrigerant evap In the drawing, numeral 20 designates, in gen eral, a refrigerator cabinet having an inner lining orating units used in connection with such ap paratus. One of the objects of my invention is to pro member 22 which forms the walls of a food com vide an improved refrigerant evaporating unit which is adapted to maintain different tempera tures in a plurality of zones. Another object of my invention is to provide an partment 213. A door 25 is provided for affording access to the food- compartment. Disposed with in the food compartment is my improved refrig erant evaporating unit designated, in general, by the numeral 30. ‘ I The refrigerant evaporating unit 3% comprises improved refrigerant evaporating unit which in 10 two C-shaped sections 32‘ and 313, respectively. cludes a refrigerant evaporating section adapted The section 32 consists of an inner metal sheet to cool a zone to below freezing temperatures and 36 and an outer metal sheet 38 secured together a second refrigerant evaporating section adapted in face to face relationship and formed to pro to maintain a second zone at fast freezing tem~ peratures, said sections together being adapted to 15 vide refrigerant passages therebetween. Aser pentine corrugation is formed in the inner sheet maintain a third zone at above freezing tempera 36 to provide a single refrigerant passage 40 which tures. lies within the top wall, designated by the nu Another object of my invention is to provide an meral 42, of the section 32. A plurality of parallel improved refrigerant evaporating unit ‘which comprises a non-?ooded section arranged to pro vide a below freezing zone and a ?ooded section arranged in conjunction with a second non ?ooded section to provide a fast freezing zone. corrugations are formed‘ in the outer metal sheet 38 to provide refrigerant passages 44 which are joined at their inlets by a manifold 56 formed in thev outer sheet and at their outlets by a header 48 formed in both the inner and outer sheets. Another object of my invention is to provide The parallel passages it are arranged on the bot an improved refrigerant evaporating unit which tom wall and rear wall, designated 50 and 52, comprises a C-shaped section having a single re respectively, of the C-shaped section 32. The ser frigerant passage and a second C-shaped section pentine passage 40 is connected to the inlet mani separated from the ?rst section by a partition and fold 46 by means of a passage 54 and a number having a single refrigerant passage connected in of restricted passages 56 which are all formed series to a plurality of parallel refrigerant pas in the outer sheet 36. An inlet connection 58 is sages joined at their outlet by a header.» formed in the outer sheet 38 and arranged in Further object and advantages of the present open communication with the open end of the invention will be apparent from the following serpentine passage 40 while an outlet connection description, reference being had to the accom panying drawing, wherein a preferred form of 35 60 is also formed in the‘ outer sheet and arranged in open communication ‘with the header 48. The the present invention is clearly shown. two sheets 36 and 38 are preferably welded around In the drawing: their peripheral edges and between the corru , Fig. 1 is a fragmentary vertical front view in. gations formed therein to provide the refrigerant elevation and partly broken away of a refriger ator showing my improved rerigerant evaporat 40 passages. The C-shaped section 32 is supported within a U-shaped metal sheet 52 having side ing unit; » walls 64 and 66 and a rear wall 68. The rear wall Fig. 2 is a View shown partly in elevation and. 68 is partially cut away in order to expose the partly diagrammatically of my improved refrig , rear wall 52 of section 32 to circulating air within erant evaporating unit and a refrigerating sys the food compartment. Brackets ‘it are attached tem associated therewith; 45 to the top of the U-shaped sheet 62 for fastening Fig. 3 is a view in cross-section of a portion same to the top wall of the inner lining member of my improved refrigerant evaporating unit; 22 with the aid of bolts 12. The walls of the U Fig. 4 is a view taken along the'lines 4-—4 of shaped member 62 extend above the section 32 Fig. 1; ’ enclose in conjunction with the rear wall Fig. 5 is a plan view of the sheet metal portions 50 and 52 and bottom wall 50 of section 32 and the top of one section of my improved evaporating unit wall of the inner liner 22 a fast freezing zone ‘it. prior to bending; and . The C-shaped section 34 consists of an inner and Fig. 6 is a plan view of the sheet metal portions outer metal sheet designated by numerals 8!} and of another section of my evaporating unit prior 82, respectively, which are secured together in to bending. 55 face to face relationship and formed to provide 2,410,360 3 refrigerant passages. A serpentine corrugation crating unit 30, fast freezing temperatures will be maintained in zone 74 during the on-cycle and off-cycle periods of the condensing unit, be~ frigerant passage 85 which is arranged to extend low freezing but higher temperatures will be main substantially over the entire surface of the top, tained in zone Ill! by section 35 and above freez~ bottom and rear walls, designated by numerals ing temperatures will be maintained in the food 88, 9B and 92, respectively, of the section 34. An compartment 2d by sections 32 and 34 ‘together. inlet connection 94 and an outlet connection 96 Fast freezing temperatures are maintained by are formed in the outer sheet 82 at the extremities section 32 during both off and on cycles because of the serpentine passage 85. A conduit 9'! con hosts the outlet 96 of the serpentine passage 35 10 the ?ooded portions contain enough liquid re frigerant at the expiration of the on-cycle to to, the inlet 58 of the serpentine passage 48 of maintain the heat absorbing effectiveness of the section 32. The section 34 is attached to the side section throughout the off-cycle. Section 34 is wall 66 of the U-shaped sheet 62 by means of elon maintained at a below freezing ‘temperature since gated L-shaped members 98. Holes I05! are pro it is supplied with the same low temperature re vided in the top wall of section 34 to enable it to frigerant as section 32 during the on-cycle but be suspended from the inner liner 22 by means of its temperature is somewhat higher than that of bolts I02. A sheet metal wall. IE4 is attached section 32 since during the off~cycle any liquid to the open side of section 34 to provide in con refrigerant it contains passes into the ?ooded junction with the walls of section 34 and the wall 66 a below freezing zone H0. Preferably, 20 portion of section 32. The temperature main tained in compartment 24 is above freezing since a door I I2 is provided at the front of the evap substantially all the cooling of the circulating air orating unit for preventing air from the food is accomplished by only the refrigerated bottom compartment 2!! from circulating into the interior and back Walls of the evaporating unit, the side of the zones ‘M and H0. An inverted U-shaped shelf H4 is disposed intermediate the top and 25 walls not being refrigerated. Accordingly, it will be clear from the foregoing that I have provided bottom Walls of section 32 to provide a support a refrigerant evaporating unit which is adapted for receptacles. This shelf is supported on the to maintain different temperatures in a plurality bottom wall of the section 32 and is preferably re of zones, and, more particularly, I have provided movable therefrom, as shown in my Patent No. a refrigerant evaporating unit which is adapted 2,325,705 issued August 3, 1943. Liquid refrigerant is supplied to the refriger to provide a frozen food storage zone, a fast is formed in the outer sheet 82 to provide a re ant evaporating unit 30 by means of a condens ing unit I20 disposed in a machine compartment freezing zone and an above freezing food storage (notshown) provided in the cabinet 28. The Although only a preferred form of the inven condensing unit comprises a sealed motor com tion has been illustrated, and that form described in detail, it will be apparent to those skilled in pressor unit I22 and a condenser I24. Evaporated refrigerant is returned from the outlet Bil of the zone. . the art that various modi?cations may be made therein without departing from the spirit of the header. 48 through a conduit I26 to the com invention or from the scope of the appended pressor 122. It is there compressed and delivered to the condenser I24 through a conduit I28. The 40 claims. condenser liquefies the compressed refrigerant I claim: 1. A refrigerant evaporating unit comprising a and then delivers it to a small diameter tube I39 which conveys the lique?ed refrigerant to the inlet 94 of the serpentine passage 86. This small diameter tube I39 serves to meter the ?ow of v. liquid refrigerant in a. manner well understood in the art. Preferably, the small diameter tube I30 and the returned conduit I25 are arranged in heat exchange relation, as indicated at $32. The liquid refrigerant entering the serpentine ; passage 86 is circulated therethrough to the in terconnecting conduit 97, some evaporation of the c-shaped section having a single refrigerant flow passage and a second C-shaped section having a plurality of parallel passages and a single refrig erant flow passage communicating at one end with said parallel passages and at the other end with said ?rst mentioned single refrigerant flow pas sage. 2. A refrigerant evaporating unit comprising a non-?ooded refrigerant evaporating element hav ing parallel refrigerated walls arranged to provide liquid refrigerant taking place in the serpentine a low temperature zone ,therebetween, a second non-?ooded refrigerant evaporating element and passage; The mixture of evaporated and un evaporated refrigerant is then conducted through ; 1, a ?ooded refrigerant evaporating element ar ranged to provide a fast freezing zone therebe the serpentine passage 40 in the top wall 42 of tween, said ?rst mentioned non-?ooded evaporat section 32. It is then conveyed from this s_er~ ing element and said ?ooded evaporating element pentine passage 48 through the conduit 54 and being arranged to cool circulating air in a third restricted passages 56 to the distributing mani ' fold 48 of the parallel passages Ml. These re 60 zone. 3. A refrigerant evaporating unit comprising a stricted passages 48 aid in promoting uniform non-?ooded refrigerant evaporating element hav circulation of refrigerant through the parallel ing parallel refrigerated walls arranged to pro passages 44. These parallel passages All are main-_ tained in a flooded condition during normal op ‘,_. vide a low temperature zone therebetween, a sec 0nd non-?ooded refrigerant evaporating element erations of the system. Evaporated refrigeran is withdrawn from the header t8 connecting these parallel passages back to the compressor through the conduit I26 to repeat the cycle just described. and a ?ooded refrigerant evaporating element having a portion arranged in parallel with said second non-?ooded evaporating element to pro The system is preferably intermittently oper~ .vide a fast freezing zone therebetween, said ?rst mentioned non-?ooded evaporating element and ated under the control of a thermostat (not said ?ooded evaporating element being arranged shown) so as to maintain the (‘s-shaped section to cool circulating air in a third zone. ; 32 at a sufficiently low temperature during one 4. A refrigerant evaporating unit comprising a oration of ‘the condensing unit to provide fast freezing temperatures within the zone 14. Then _ non-?ooded refrigerant evaporating element hav because of the improved construction of the evap 75 ing parallel refrigerated walls arranged to provide 5 2,410,360 6 a low temperature zone therebe'tween, a second said other compartment, said evaporating means being connected in refrigerant ?ow relationship non-?ooded refrigerant evaporating element and a ?ooded refrigerant evaporating element having in sequence in the order named. '7. Heat absorbing means comprising three ver a portion arranged in parallel with said second non-?ooded evaporating element to provide a fast freezing zone therebetween, said refrigerant evaporating elements being connected in refrig erant ?ow relationship in the order named. 5. A refrigerant evaporating unit comprising sheet material arranged to pro'vide two compart ments, a serpentine refrigerant passage associated with one of said compartments only, a second serpentine refrigerant passage associated in heat exchange relation with a Wall of the other com partment only and a plurality of parallel refrig erant passages associated in heat exchange rela tion with the opposite wall of said other com partment, said refrigerant passages being con nected in refrigerant ?ow relationship in sequence in the order named. 6. A refrigerant evaporating unit comprising sheet material arranged to provide two adjacent compartments, non-?ooded refrigerant evaporat ing means associated with the walls of one of said compartments only, non-flooded refrigerant evaporating means associated in heat exchange relation with a wall of the other compartment only and ?ooded evaporating means associated in heat exchange relation with an opposite wall of CH tically extending single ply sheets of ‘metal in spaced apart relationship, refrigerant conveying means extending between the uppermost edges of only two of said sheets, refrigerant conveying means extending between one of said two sheets 10 and the third substantially midway between the upper and lower portions thereof, and refrig erant conveying means extending across the spaces between the lower portions of all three of said sheets. 8. Heat absorbing means comprising three ver tically extending single ply sheets of metal in spaced apart relationship, refrigerant conveying means extending between the uppermost edges of only two of said sheets, refrigerant conveying means extending between one of said two sheets and the third substantially midway between the upper and lower portions thereof, vertically ex tending refrigerant ccnveying means extending between the vertical edges at one-end of each of said three sheets, and refrigerant conveying means extending across the spaces between the lower portions of all three of said sheets. LAWRENCE A. PHILIPP. '