US2315222A - Refrigerating apparatus - Google Patents

Description

March 30, 1943. L. A. PHLIPP 2,315,222

REFRIGERATING APPARATUS Original Filed April 25, 1959 INVENTOR. Lqw 'larycz l9. P1111. IPP

5 MW 21M ATTORNEY.

Patented Mar. 30, 1943 UNITED STATES PATENT OFF-ICE REFRIGERATING APPARATUS Lawrence A. Philipp, Detroit, Mich, assignor to Nash-Kelvinator Corporation, Detroit, Mich, a corporation of Maryland Original application April 25, 1939, Serial No. 269,997. Divided and this application December 6, 1940, Serial No. 368,847

the drainage connection.

The invention itself, however, both as to its organization, and its method of operation together with additional objects and advantages thereof,

will best be understood from the following de- I scription of specific embodiments when read in conjunction with the accompanying drawing, in which:

Fig. 1 is a central vertical longitudinal view in cross section of a refrigerator cabinet showing the invention applied;

Fig. 2 is a viewtakenalong line 22 of Fig. 1;

Fig. 3 is a fragmentary vertical longitudinal view in cross section of a refrigerator illustrating a modified form of the invention for collecting and removing the melted ice defrosted from an evaporator;

Fig. 4 is a fragmentary view in cross section of a refrigerator illustrating a further modified form of the invention for collecting and removing the melted ice defrosted from an evaporator;

Fig. 5 is a fragmentary view in cross section of a refrigerator illustrating a modified form of the invention for vaporizing the water collected in the defrosting pan during the defrosting of an evaporator.

Referring to Fig. -1 in the drawing, a cabinet I0 is constructed of insulated side, top and bottom walls l2 to provide for a food storage compertinent iii. The front wall I4 is provided with an opening i5 for access to the compartment It closed by a swingably mounted closure member I8. A second compartment is provided-in the cabinet l0 wherein is placed the compressor-condenser unit 22 of a refrigerating unit.

Secured to and suspended from the top wall Within the food storage comparment I6 is an evaporator 24. Leading from the evaporator 24 for drawing heat laden refrigerant therefrom is a conduit 26 connected at its opposite end to the 'motor compressor unit 28. The compressor-28 is connected by conduit 30 to the condenser 32. The passage of refrigerant through condenser 32 serves to liquefy the refrigerant to'be conducted through a small diameter conduit 34 to the evaporator 24. The conduit 30 is formed intermediate the compressor unit 28 and condenser 32 into a spiral coil 36 in which is fitted a cup-shaped container or bucket 88. The coil 36 maybe soldered, welded, or the like to the container 38 to form a thermal bond therebetween.

Preferably the system is operated so that little or no frost collects on the surface of the evaporator 24. The little frost that does collect is during the cycling of the compressor when there is a rapid withdrawal of gaseous refrigerant from the evaporator, but this frost quickly melts during the oil-cycle of the compressor. The system may however be operated to collect and retain frost on the surfaces of the evaporator as is well understood in the ant. In this case it is necessary to periodically defrost the evaporator. In order to catch this drip there is positioned beneath the evaporator a shallow pan 40. The pan 40 is carried on and serves also as a cover for the deep pan or food storage container 42 that is 'slidably supported on rails 44 secured on shelf 46. The

shelf is supported on brackets 48 provided on the side walls of the food storage compartment l9.

Secured in the rear wall of the pan "is a tube i 59 so arranged as to permit drainage of thewpan mouth 52 of conduit 54.

The condensate in the container or bucket 38 will be in heat exchange relation with the compressed refrigerant flowing through cell 36 toward the condenser 32. This relationship will tend to lower the temperature of the refrigerant in coil 36 while the vaporization of the condensate will be considerably increased so that the condensate will rapidly pass into the atmosphere in form of vapor. It will be noted that by this arrangement there is not only eliminated the necessity of manually removing the condensate from the pan, but also increases the emciency of the condenser as it permits the refrigerant to enter the condenser at a lower temcollect and maintain frost thereon when open type storage containers are used for the storage of meats and the like.

In the form shown in Fig. 4 the pan 10 is provided with a drain tube arranged as a, U-shaped syphon 80 which also terminates over mouth 14 of the drain tube 16. The condensate collects in the pan 10 until a predetermined level 'is reached when it flows through the syphon tube 80 into conduit 16.

In Fig. 5 there is shown a modified form for the vaporization of the condensate by arranging an open trough 90 circumferentially on the shell of the motor-compressor'unit 92. Admin conduit 94 terminates within the trough 90 emptying therein the condensate defrosted and collectedfrom an evaporator. The heat created by the operation of the compressor and transmitted to, to be radiated by the shell will be absorbed by the condensate or water, in the trough 80, increasing its vaporization so that there is provided a means for passing the water in form of vapor into the atmosphere and maintaining a cooler operating motor compressor unit 28.

'While I have illustrated and described the preferred forms of my invention, I do not wish to limit myself to such details as described, but wish to avail myself of such variations and modifications as may come within the scope of the appended claim.

I claim:

Refrigerating apparatus comprising a cabinet having a compartment, a refrigerant evaporatlng element for cooling said compartment, a

removable deep pan for the storage of meats and the like, slideways for slidably supporting said= pan below said element, said pan also serving. to collect defrost water from said element when

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