USRE14112E - And william c - Google Patents

Description

G. I. LEONARD 61 W. C. CUTLER.

REFRIGERATING APPARATUS.

APPLICATION mw Nov.24. 1915.,

Rissued Apr. 18, 1916.

Ves

UNITED sTATEs PATENT oF-Ifron.

GEoRGE "1. LEONARD, or CnICAGo, ILErNoIs, AND WILLIAM' C. oE-noarv ANGELES, CALIECRNI'A, AssIGNoRs'ro LEoNARn ROTARY mm1?y -coRroRA- TICN, A CoECRA'rIoNoE CALIFORNIA.

REFBIGERATING APPARATUS.

Specification o! Reissued Letters Patent. Reissued API-18, 1

Original application led December 2B, 1911, Seria1-No.688,328. Renewed April 28, 1918, Serial No. 764,259.

Original No. 1,086,675, dated Serial No. 63,315.

To allwhom t may conce, u.

Be it known that we, GEORGE I.' and WILLIAM C. CUTLER, citizens of the iUnited States,`

Chicago, in the county of vCook and State of Illinois-'and Los Angeles, in the county of Los Angeles and State of California, have invented a' new 'and useful Refrigerating Apparatus, of which the following is a'specication. v

This invention relates to improvements in ,apparatus for refrigeration by the use 'of a readily condensable fluid or vapor.

The invention is particularly intended for use in refrigerating plants or apparatus of small capacity such as are adapted lfor use in hotels, houses or commercial establishments.

The main object of the invention is to provide a refrigerating apparatus of this character which will be extremely simple in construction and operation, and at the same time highly efficient.

Other objects of the invention will appear hereinafter.A

The accompanying drawings illustrate an embodiment'ofthe invention, and re,- ferring thereto- Figure 1 is a side elevation of the apparatus partly in section, the refrigerating pipe line being shown diagrammatically. Fig. 2 is a 'section on line a02-m2, Fig. 1.

The refrigerating apparatus comprises a combined compressor and condenser indicated at 1, an expansion valve indicated at' 2, and a refrigerating pipe line -or member indicated at 3, said parts being connected by a piping in such manner as to carry o ut the cycle of operation consisting of com-` pression, cooling, condensation and expansion.

The, compressingr and condensing apparatus 1 comprises a case or tank 5, which may be of any suitable shape, means such as a water jacket 6 surrounding said case foriabstracting heat from the contents of the case. A rotary pump 7 `is inclosed fwithin the case,'a pipe Y8 for the expanded gasor vapor being connected to the intake side of .the said pump. and the outlet side of said pump communicating directly with the interior space of the case 5, and a body residing, respectively, at-

Ife'bruary 10, 1914. Application for reissue led November 24,1915.

at its outer end to suitable driving means such .as a motor 18, a llexible joint 19 be- Ing interposed if necessary between the motor shaft 20 and the shaft 14 of the pump'. The outlet side lof the pump case-A 13 is cut away or open, as shown at 21, and

the inlet side'of the pump case is provided with a passage 22 communicating with the pipe 8 aforesaid, said pipe being'provided with a check valve 24 tol prevent back 110W of gases from the pump.

The upper part of thecase 5 constitutes a receiver for the compressed and condensed vapor or fluid, and an outlet pipe 25 for the condensed liquid extending lthrough the top 26 of the case 5 and through a stuiling box 27 to connect withA a pipe 28 extending within an outer pipe 29, said pipe 28 extending at its farther end through alstuiing box 30 at the correspondin end. of said pipe 29, and being connected through an expansion valve 2 to the pipeI or coil 3 for distributing or leading the expanded cold fluid to any suitable refrigerator or other device to be cooled. A `return pipe 34 from said pipe or coil 3 connects to the outer end of the end portion of the pipe 29 aforesaid, the other end of said pipe being connected by connections 36 to the pipe 8 aforesaid.

The case 5 may be of any suitable construction, consisting, for exam le, of s. base 38 and castings 40 and 41 orming twohalves of a castings being formed with a semi-cylindri- Cal Water-jacket chamber6, and sald castings having vertical `flan them to be fastened by bo ts 43, and being provided with horizontally extending ilanges 45 cylindrical case, 'each of saides 42 to enableto receive bolts 46 for fastening the case 'the apparatus, both of members to the base and to the top member,26. A pipe 47 connects chambers 6. Gaskets arefinterposed between the cylindrical portion of the case and the top` and bottom thereof, each gasket consisting, for example, lof a brass ring 48-and a ring 49 of asbestos illed with a mixture of glycerin and litharge. We have found that such a gasket is kimpervious to the water in the water jacket, to the glycerin, and to the rhigolene. i

The operation is as follows The liquid indicated at 10 within the case-5 and submerging the pump is of such a'nature that it doesnot mix or react with the refrigerating medium. I have found that rhigolene is a suitable refrigerating medium for use vin this apparatus, and I prefer to use glycerin as the liquid for submerging Vthe pump, glycerin bein-g without eifect von the vrhigolene and not mixing therewith. Glycerin is heavier than rhigolene and is" nonvolatile at temperatures usually present in these being necessary properties for ,the submerging liquid. Moreover, glycerin has the advantageous property that it does not nebulize when stirred or agitated with the rhigolene vapor. That is to say, the rhigolene does not form bubbles in the glycerin under such conditions. Water is supplied to the water jacket chamber 6 through the connection 44, and the temperature in the case 5 is thereby maintained at such a point in the operation of the pump that the compression produced on the rhigolenevapor is suiiicient to cause condensation of the rhigolene `to liquid, forming' a body of liquid rhigolene indicated at 50 resting on the body of glycerin 10. 'As the liquid is compressed bythe operation of pump 7 in continual contact with'the glycerin and the metallic parts of the pump, the cooling effect. of the water jacket is continually transmitted from the outer walls of the case through the glycerin to the metallic parts of the pump and to the rhigolene vapor which is being compressed, so that the maximum cooling elfect on the rhigolene is obtained, and at the same time the glycerin acts as a seal, preventing leakage of vapor in the pump and insuring the full compressive action of the pump on the vapor. The rhigolene condensed in this manner within the case is, by reason of the pressure in the case, forced out through the pipe 25 and passes to the expansion valve 2,

vat which it is expanded, the resulting coldl vapor or gas passing through the pipe or coil 3 and bac exerting a cooling effect .on the liquid withl1n the inner pipe 28 soas to increase the refrigerating effect. The gas or vapor passes from the pipe 29 to the pipe B aforesaid, leading to the intake of the pump where it is again subjected to "compression by the through the outer pipe 29,`

An important advantage of the construction above described isthat the compressing and condensing apparatus is wholly selfcontalned and requires no external case or retainer for the vrefrigerating liquid.

The form of rotary pump shown operates by carryingthe vapor or gas in the spaces between the teeth and delivering such vapor or gas to the outlet of the pump casing into the vbody of the liquid 10 vin the interior of the case 1, said lbody of liquid beingl cooled by the action of the water jacket so that as the gas or vapor is brought into contact therewith and is subjected to the full pressure in the interior of the case it is condensed wholly or partially and rises to the top of the body of liquid 10 by reason of its lighter specific gravity. The spaces between the teeth are filled withl the glycerin or `the submerging liquid in this operation, and in the continuation of the rotary movement this liquid is squeezed out from in between the teeth by the intermeshing tof the gears. In this intermeshing operation the formation of the gears with two spiral portions having reversely inclined teeth is of special advantage in that it gives a gradual intermeshing action so that the liquid is first forced from the end portions of the spaces and expulsion of the liquid proceeds gradually from the end portions toward the center. By 'this gradual action of the liquid, due to the spiral form of the gear teeth, we avoid excessive strain or pounding due to sudden pocketing and compression of the liquid between the teeth at the point of intermeshing, thereby avoiding excessive `strain on the bearings with resulting wear and friction.

To eliminate any sudden compression that might occur at the moment that the compression or expulsion of liquid reaches the mid-point of the teeth where the two spiral portions come together, we may provide at such portion a recess or pocket 51 forming a passage or clearance space for expulsion of liquid at this moment.

What we claim is:

1. A refrigerating apparatus comprising a case provided with cooling means, a ro` ing liquid therein to serve as an outlet for the condensed refrigerating uid, and expansion and distributing means connected to the said outletl and inlet pipes.

` 2. In a refrigerating apparatus,y a compressing and condensing device comprising a case provided with cooling means, a ro-r ing liquid therein to serve as an outlet for the condensed 'refrigerating fluid.

In testimony Where0fwe have hereunto setour hands at Chicago, Illinois and Los Angeles, California respectively on the 19th day of October 1915 and the 9th` day of November, 1915.

GEORGE I. LEONARD. WILLIAM c. CUTLER.

Witnesses to the signature of George I. Leonard.

HERBERT A. GASKYN, FRANK J. IRVING. Witnesses to the signature of William C. Cutler.

E. GRIGSBY, SULLY TUsso.

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