US1014833A - Temperature control of refrigerating-compartments. - Google Patents

Description

f Hartford, in the inviamo srarns Parana oriana.

ALBERT MARSHALL, OF HARTFORD, CONNECTICUT, ASSIGNOR T0 THE AUTOMATIC REFRIGERATIN G COMPANY, 0F HARTFORD, CONNECTICUT,

JERSEY.

TEMPERATURE CONTROL 0F REFRIGERATING-COMPARTMENTS.

Specication of Letters Patent.

A CORPORATION 0F NEW To all whom t may concern.'

Be it known that I, ALBERT T. MARSHALL, a citizen of the United States, residing at county of Hartford and State of Connecticut, have invented certain newand useful Improvements in Temperature Control of lRefrigerating-Compartments in Refrigeratin i the following is a' specification.

The novelty of my invention resides in the varying of the brine level in a tank ir which the refrigerating coils are placed and in thereby interposing more or less of this heat conducting medium between the refrigerating coil and the air in the compartment so that for instance when the tank is filled with brine so that the refrigerating coil is completely submerged therein its full capacity will be utilized in cooling the brine whereas if the brine level is lowered andk only a small portion of the coil is submerged therein while the rest of it is insulated by pocketed and non-circulating air in the tank from the refrigerating compartment, only a small portion of the coil will have effect on the compartment.

In the accompanying drawings I have illustrated how my invention may be reduced to practice. A

In these drawings: Figure 1 is a longitudinal sectional elevation of three refrigerating compartments, and Fig. 2 is a transverse sectional elevation of compartment 12.

In these drawings l0, 11 and l2 represent three refrigerating compartments which may be of varying sizes as shown. In the upper portion of each compartment is disposed a metal tank 13 adapted to contain brine or L other suitable liquid with a loW freezing point. I prefer to use strong brine. The iquid is supplied to the tanks through main 16 which passes through all the chambers, the

supply being controlled by hand valve 17.

The brine may be drawn" from each tank until the desired level waste valve'18.

In each of tanks A13 is placed a refrigerat-V ing coil 14 which is suppliedwith refrigerant from lthe main 1 The refrigerating coils 14 are connected to the all the coils which are in operation are in series. For this purpose in the two ends of each coil near the polnt where they join the maln 19 are .disposed hand valves 4 and 5 is reached by opening Systems, of which and brine supplied ,ment shou main 19 so that' valve l, 2 and 3 respectively is interposed in main 19. The refrigerant flows through main 19 in the direction as indicated by the arrow in Fig. 1. ll now be seen that when all hand valves 1, 2 and 3 in main 19 lare closed, but valves 4 and 5 of each coil are open, refrigerant will pass through all three coils in series. If it is desired, for instance, to cut the refrigerant off from one of the coils for instance coil 14 in chamber 11, hand valve 2 is first opened and. then valves 4 and 5 of coil 14 are closed. In consequence'the refrigerant will pass di- .rectly through bypass valve 2 without passing. through coil 14 in chamber 1l. Thus any of the chambers may 'be entirely cut off from refrigerant.

The operation of this system is as follows:

Assuming lthat all three coils are open and their respective bypasses l, 2 and 3- closed so that the refrigerant passes through all the coils in series as described and assuming that each of the com artments l0, 11 and l2 should have difildrent temperature; then brine valve 17 in each chamber is opened to tank 13 until a certain level is reached. The brine being cooled by the refrigerating coils submerged therein will in turn, owing to .the large surface of the metal tank, form a very effective coolin medium for the compartment. Should the temperature in the compartment be still above the desired one, the brine level in that tank is raised by again opening-hand valve 17 which submerges more turns of refrigerating coil 14 in this tank. Consequently a larger portion of the refrigerating coilI becomes effective so that the temperature of the brine in this tank is lowered and also thebrinelevel being raised in this tank a larger effective cooling surface is exposed to the air surrounding the tank. If, on the other hand the temperature' of the compartd be too low, brine waste valve 18 is opened and brine withdrawn `from the tank. Thus less turns of'refrigerating coil 14 become effective in cooling the brine, the

.rest of the turns which are not submerged being most effectively insulated by the tank walls and the air contained therein from the air contained in the compartment.l Moreover now less'of the metallic tank surface is cooled by brine and Patented Jan. 16,1912. Application flled July 301910. Serial No. 574,684.

thus the effect of the,

' coil on the temperature of the compartmentll ductor incasing said coil and having heat is lessened. -I have found'that in practice conductive connection with said coil an by thus changing the brine level in the sevmeans for varying the extent of said coneral compartments a very satisfactory and nection with the coil. uniform refrigeration of the compartment 4. In a refrigerating chamber the combimay be obtained. If it is required to cut nation With a refrigerating coil disposed out the refrigerationin'o'ne or several com- 'therein, a metal tank in said chamber in partments the refrigerant supply is cutoi `Which said 'coil is disposed, said tank adapt- 'as described above. ed to contain non-freezing iuid, and means What I claim is: for varying the level of the fluid in said `1. Ina refrigerating chamber, the combitank to submerge more or less turns of said nation with a Arefrigeratin coil disposedv Coil therein. I therein, through the Whole lqength of which 5. In a refrigerating chamber the combithe refrigerant passes, and means for innation With a refrigerating' coil disposed creasing and Adecreasing `the effective area therein, a metal tank in said chamber in of said coil, While its entire length is travwhich said coil is disposed, said tank adaptersed by the refrigerant. ed to contain brine, means for supplylng 2. In a refrigerating chamber, the combibri'ne to Nand draining it from said tank to nation of a refrigerating coil for conducting vary the brine level and thus the number of a lcontinuous iow' of refri erant through turns of said coil submerged in the brine at its entire length and means I sulating portions of said' coil; from said of Said Coil I' the purpose Set forthchamber. LBERT T. MARSHALL. 3. `In a refrigerating chamber, the combi- Witnesses: nation of a refrigeratin coil for conducting HARRY E. KNIGHT,

a continuous ow of re rigerant, 4a heat con- M. G. CRAWFORD.

or variably m. will to increase or decrease the eective area l

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