US726217A - Refrigeration system. - Google Patents

Description

N0 MODEL.

' BALI-EDITED APR. 21, 1903. Q. J. COLEMAN. REFRIGERATION SYSTEM.

APPLICATION FILED JAN. 22, 1900. RENEWED JULY 25, 1902.

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PATENTED APR. 21 1903.

o. J. COLEMAN. REFRIGERATION SYSTEM. APPLICATION PIELED JAN. 22, 1900. RENEWED JULY 25, 1902.

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CLYDE .l. COLEMAN, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO CLARENCE'VV. COLEMAN.

REFRIGERATION SYSTEM.

,PEGIFICATION forming part of Letters Patent No. 726,217, dated April 21, 1903.

Application filed January 22,1900. Renewed July 25, 1902. Serial No. 116,890. (No model.)

To all whom zit may concern:

Be it known that I, CLYDE J. COLEMAN, a citizen of. the United States of America, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Refrigeration Systems, of which the following is a specification.

The present invention relates to refrigeram tion systemsin which the refrigerant medium is positively transferred from the coolingchamber in an automaticallycontrollable manner, and more particularly to 'thattype of the same as shown in my prior application,

I5 Serial No. 733,689, filed October 19, 1899, in

which a denser intermediate fluid moving in an endless path is employed to effect the above-mentioned transfer of the refrigerant medium. I 3 The object of the present improvement is to provide a simple and efficient apparatus in which the different operations of the refrigeration system are automatically controlled to maintain a predetermined temperature in the cooling-chamber, all as will hereinafter more fully appear and be more particularly pointed out in the claims.

In the accompanying drawings, illustrative of the present invention, Figure 1 is a sectional elevation of a refrigeration apparatus embodying the present invention and showing the application thereof to an ordinary household water-cooler. Fig. 2 is an enlarged detail vertical section of the compression apparatus of the present system. Similar numerals of reference indicate like parts in both views.

Rpferrin gtg the drawings, 1 represents the storage-chambenfeiathe efrigerant medium of the system, 2 the cooling or expansion chamber or coil, and 3 the expansion-valve, located between the storage and cooling chambers, as usual in the present class of refrigeration systems.

The compression apparatus by which the expanded refrigerant medium, such as ether or other analogous fluid or vapor, is drawn from the cooling-chamber and forced into the storage-chamber will in the present improvement comprise thefollowing-described mechanism: 4 is a jet-pump or injector receiving its supply of a denser intermediate actuating fluid, usually mercury, from an elevated supply-chamber 5. The inlet or suction chamber 6 of such injector is connected by pipe connection 7 with the cooling chamberor coil 3 and adapted to draw or exhaust the ex- ;panded refrigerant medium therefrom. 8 is T a closed tank or receiving-chamber into which the vertical eduction-pipe ,9 of the injector 4 .60 discharges the intermediate motive fluid, leaving the lighter refrigerant medium in the upper portion of such chamber, from whence it passes, through pipe connection 10, into the condensing or storage chamber 1 for subse- 'quent reuse in the process of refrigeration.

11 is a check-valve in the pipe connection 10 to prevent a return-flow of the refrigerant medium from the storage-chamber. 12 is a Verticalstand-pipeconnectingthelowercham 7o ber 8 with the elevated supply-chamber 5 of the injector, and in my preferred construction as shown in the drawings constitutes an inclosing-housing for the vertically-arranged operatingshaft 13 of the endless screw or propeller 14., by means of which the denser intermediate actuating fluid is forcibly lifted from the lower chamber 8 to the upper chamher 5 in acontinuous manner during the operation of the system. Atits lower end the operating-shaft 13 will be supported in a suitable bearing, so as to insure the proper concentric'ity of the endless screw or propeller 14 in the lower end of the stand-pipe 12 in the operation of the apparatus. At its upper end the shaft 13 will be provided with a belt pulley 15 or other equivalent device having belt or other equivalent connection with a pulley 16 on the'armature-shaft of an electric motor 17. o

Inthe present improvement leakage of the refrigerant medium, as well as the intermediate motive fluid, between the operatingshaft 13and theupper end of the stand-pipe 12 is prevented by a fixed inner cup-shaped 5 sleeve 18,- secured within the stand-pipe, and

an inverted cup-shaped sleeve 19, secured to the operating-shaft 13, as shown in Fig. 2 of the drawings,the two members being fitted together,as shown, and containingabodyof liqtoo uid, usually mercury, to constitute a seal. With the above-described construction the sleeves can be made of any required vertical length to afford the desired seal and at the same time offer a minimum resistance to the rotation of the operating-shaft 13.

In my preferred construction as shown in Fig. 2 of the drawings the lower end of the eduction-pipe 9 of the injector dips into the intermediate fluid contained in the lower receiving-chamber 8, so as to seal the lower end of such pipe 9 against a return-flow of the refrigerant medium through the injector. With such provision the necessity of a mechanical check-valve in the pipe 9 is avoided.

20 is a thermostat located within the influence of the cooling coil or chamber 2 and adapted to open or close the electromotive circuit of the electric motor 17, by which the compression apparatus of the system is impelled, in accordance with the varying conditions existing in the cooling or expansion side of the system.

A minor feature of the present invention involves the particular arrangement of a refrigeration apparatus in connection with a household water-cooler, as illustrated in Fig. 1 of the accompanying drawings, and comprises the mounting of the storage-coil 1 and the electric motor 17 directly upon the topclosure or cover 21 of the water-cooler, with the compression apparatus in a pendent condition exterior of the body of the water-cooler and with the cooling-coil 2 in a similar pendent condition interior of said water-cooler, the purpose being to afford convenient access to the interior of the water-cooler for cleaning purposes and the like.

In the operation of the present apparatus the expanded refrigerant medium is drawn from the expansion-chamber 2 through pipe connection 7 by the injector t and compressed into the upper part of the receiving or separating chamber 8, from whence it passes through pipe connection 10 to the storagechamber 1 to be again expanded in the expansion-chamber 2 in the continued operation of the apparatus.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In an automatic system of refrigeration, the combination with the storage-chamber and cooling-chamber, of a compression apparatus arranged intermediate of such chambers and comprising an injector, a connection forming a circuit between the inlet and discharge ends of the injector and adapted to contain a denser intermediate motive fluid, and an endless screw or propeller arranged in said connection and adapted to impart movement to the motive fluid, and means connected with the cooling-chamber for automatically controlling such compression apparatus, substantially as set forth.

2. In an automatic system of refrigeration, the combination with the storage-chamber and the cooling-chamber, of a compression apparatus arranged intermediate of such chambers and comprising an injector, a connection forming a circuit between the inlet and discharge ends of the injector and adapted to contain a denser intermediate motive fluid, a separating-chamber in said connection, and an endless screw or propeller arranged in said connection and adapted to impart movement to the motive fluid, and means connected with the cooling-chamber for automatically controlling such compression apparatus, substantially as set forth.

4:. In an automatic system of refrigeration, the combination with the storage-chamber and the cooling-chamber, of a compression apparatus arranged intermediate of such chambers and comprising an injector, a connection forming a circuit between the inlet and discharge ends of the injector and adapted to contain a denser intermediate motive fluid, a separating-chamber in said connection, and an endless screw or propeller arranged in said connection and adapted to impart movement to the motive fluid, and means connected with the cooling-chamber for automatically controlling such compression apparatus, the eduction connection of the injector extending below the surface of the motive fluid in the separating-chamber to constitute a seal, substantially as set forth.

5. In an automatic system of refrigeration, the combination with the storage-chamber and the cooling-chamber, of a compression apparatus arranged intermediate of such chambers and comprising a gravity-injector,alower receiving-tank, a return connection adapted to contain adenser intermediate motive fluid, and an endless screw or propeller arranged in said connection and adapted to impart movementto the motive fluid, and means con:

nected with the cooling-chamber for auto ling said compression apparatus, substantially as set forth. v v

7. In an automatic system of refrigeration,

as herein set forth, the combination with the.

tus attached to said cover, substantially as set forth.

- 9. In an automatic system of refrigeration as herein set forth, the combination withthe water-cooler and the top-closure or cover thereof, of a refrigerant storage-chamber and the motor of the compression apparatus mounted directlyupon said cover, and a cooling-ohamberand the compression apparatus connected to said coverin a pendent manner,

substantially as set forth.

Signed by me atNewYork,N.-Y., this 16th day of January, 1900.

CLYDE-J. COL MAN.

WVitnesses:

ROBERT BURNS, HOLMES.

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