US2496220A - Domestic refrigerating unit - Google Patents

Description

Jan. 3H, M5@ H. w. KLEIST 2,496,220

DOMESTIC REFRIGERATING UNIT @HAMM HMG riz 85,5

Jam, 3L. B95@ H. W. KLEnsT DOMESTIC REFRIGERATING UNIT Sheets-Sheet 2 Filed Jun@ 5, 19M

71C E @W v fmpw r @w NJ or within the base 20. The outletduct for the e' number, arrangement and disposition of parts without departing materially from the spirit of my invention. I wish, therefore, that my showing be taken as in a broad sense diagrammatic,

rather than as limiting me to the precise showing.

The use and operation of my invention are as follows: L f

It is desirable in refrigerator practice, to provide a freezing cabinet area such as is shown at B in which articles of food may be frozen or may be stored in frozen condition. It is also necessary to provide a preferably larger storage area as at A, the temperature of which is suffciently high so that the stored foods are not frozen. It is necessary for example for the storage of eggs, milk, green vegetables, etc.

In providing a refrigerator having cabinet spaces held at different temperatures, I find it advantageous to employ a unit which may be inserted in a cabinet at the time of the assembly of the finished ycabinet and which includes. the base 20 which serves as a partition between the freezing space B and the warmer space A and which also carries on it the cooling elements or evaporators for both storage spaces. In the assembly of the cabinet, the top Wall may be swung to open position, and the above described unit is then inserted in the interior of the cabinet and connected to the ducts 45 and d8 whichy are shown as partially embedded in the insulation of the rear Wall 4. The cover 5 is then returned to the closed position and preferably permanently or semi-permanently secured in place.

If it is desirable` to insert the unit through the front of the cabinet, a single door may be employed or the front cross member 8 may be removably connected to the cabinet. The unit 4 l a hold over.` As'examples of adequate temperatures, I may employ a zero eutectic inthe plates in compartment B anda eutectic of a tempera.- ture of the order of freezing or-slightly below, in compartment A.

One advantage of my system is that I can use a single expansionvalve for all of the evaporator units above described. This expansion valve is not illustrated in detail, but is diagrammatically shown at SII-in Figure 1. Its bulb may be located at any suitable point, preferably in the compartment A.

I claim:

l. In a refrigeration structure, a refrigerator cabinet having an upwardly removable top wall, a bottom wall, side walls and a door, said walls and door being insulated, and a partition and 'evaporator unit removably located within the cabinet, the opening closed by the .top wall being of sufilcient size to permit the removal oi' the partition and evaporator unit without disassembling, the unit being readily downwardly insertable through the top of the cabinet when the top wall is withdrawn to open position, means for supporting thev unit in horizontal position in the interior of the cabinet, the unit including a plurality of vertically spaced evaporators above said partition, and an evaporator below said partition.

2. For use in refrigerators having spaces cooled to different temperatures, a unit including a generally horizontal base of' insulating material adapted to be inserted in a refrigerator cabinet asa partition between differentially cooled spaces, a cold plate supported on said base and depending therefrom, adapted to cool a space l below said base and means for cooling a space may then be inserted and positioned on the 4 brackets 25 and the necessary ducts connected to the refrigerating circuit. It will be observed that the cooling elements are positioned in relation to each other and in relation to the cabinet as a whole by the fact that they are mounted on the base 20. The base 29, with the cold plates or cooling units on it, can be inserted unitarily in thev cabinet at the time of manufacture. The composite unit thus formed can also be removed from the cabinet if drastic repair or servicing is necessary, a substitute unit being temporarily or permanently installed to take its place.

Whereas I have illustrated only two cold plates in the upper space B, it will be understood that it may be advantageous to employ five cold plates adding cold plates at the side and rear of the space B. It is thought unnecessary to illustrate this structure as the individual cold plates may all be identical in construction.

It is advantageous to connect the cold plates in series, with the coolant going first to the cold plates of the freezing cabinet B and reaching the cold plate E, and the cabinet A only after it has flowed through all of the plates of the cold space.

It will be understood that a suitable eutectie uid is used in all the cold places, and provides above said base, including a pair of horizontal, parallel, vertically spaced cold plates, each said plate including a smooth walled outer housing and a refrigerant coil in the space Within said housing, the coils of all of said plates being connected in series, and means for delivering the coolant first to the plates above said base.

3. For use in refrigerators having spaces cooled to different temperatures, a unit including a generally horizontal base of insulating material adapted to be inserted in a refrigerator cabinet as a partition between differentially cooled spaces, a cold plate supported on said base and depending therefrom, adapted t0 cool a space below said base, and a cold plate positioned above said base and adapted to cool a space above said base, each said plate including a smooth walled outer housing and a refrigerant coil in the space within said housing, said coils being connected in series, and a single expansion valve connected to the upper coil.

HERMAN W. KLEIST.

REFERENCES CITED TheA following references are of record in the file of this patent:

l UNITED STATES PATENTS Number Name Date 2,049,799 Condor Aug. 4, 1936 2,135,875 Morse Nov. 8, 1938 2,166,161 Kleist July 18, 1939 2,166.506 Philipp July 18, 1939 2,217,702 Kleist Oct. 15, 1940

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