US1830314A - Refrigerating system - Google Patents

Description

Nov. 3, 1931. .Le. DE REMER REFRIGERATING SYSTEM Filed July 30, 1926 CONDENSER v ATTORNE g Patented Nov. 3, 1931 UNITED STATES PATENT OFFICE JAY DE REMER, OF GREENWICH, CONNECTICUT, ASSIGNOR, IBY MESNE' ASSIGN- MENTS, T J. G. DEREMER RESEARCH CORPORATION, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY REFRIGERATING SYSTEM Application. filed July 30,

to theevaporator in such manner as to prevent the entrance of vaporous refrigerant thereto, and to organize the apparatus required for accomplishing this purpose in the most compact form. 4 a

The accompanying drawings illustrates the preferred form of the invention, Figure- 1 being a diagrammatic representation of the refrigerating circuit, Figure 2 a larger scale longitudinal section of the device for preventing the entrance of' vaporous refrigerant into the evaporator, and Figure 3 a perspective detail illustrating the organization of said device in a refrigeratorcabinet.

From the diagram it will be apparent that the compressor 1 delivers compressed or liquid refrigerant into and through the condenser to the top of the valve chamber 2, thence by pipe 3 to the evaporator 4, where heat is absorbed with refrigerant eflect'in any appropriate manner. Theevaporated refrigerant is conducted by return pipe 5 around or in heat exchanging relation to the valve chamber 2 and thence back to the compressor 1.- The compressor may be of any desired type, being herein shown as a mercury type compressor such as-disclosed in my prior Patent No. Re. 15,590 and the evaporator is shown as of the unit type? disclosed in my co-pending application, although any other suitable form of evaporator may be employed in its place. The refrigerant'usedis generally butane or the like. 1

'The condenser is connected to the top of the valve chamber 2 and the later contains an outlet valve 6 at its bottom leading into the liquid pipe 3, the outlet, controlled by the valve 6, constituting the so-called expansion valve between the high and the low pressure sides of the delivery to the evaporator. The valve .6 is connected by its valve stem which extends freely through the float 7 to a lever 8,'one end of which is connected by a bracket 9 with the top of the float and the other end of which carries a counterweight 1926. Serial No. 125,848.

10. The fulcrum of the lever is provided by a depending bracket 11 appropriately supported in the upper part of the valve chamber. As thus arranged, the valve is opened by the increasing liquid leveljn the valve chamber and is closed when the level falls below a predetermined minimum, thus precluding the entry of vaporous refrigerant into the evaporator.

If within the limits imposed by its temperature and pressure, the liquid in the valve chamber vaporizes to such extent that the vapor excludes further entry of liquid from the condenser, the valve becomes gas bound and the system ceases to function until the condenser pressure builds up sufliciently to condense the vapor or overcome its pressure. Such a situation may occur during the operation of the apparatus although it is more likely to arise as the result of an extended period of idleness of the apparatus. In-order therefore to prevent such interruption during working and to expedite the reinstatement of normal delivery conditions of the refrigerant after such a period of idleness. the vapor pipe 5 is brought into cooling relation to the valve chamber, which may be done by coiling it around the latter as indicated, or in any other manner customary for heat exchangers. N 0 communication is provided between the vapor pipe 5 and the valve chamber, except for transfer of heat through the wall of the latter. There is normally a suf ficient refrigerating capacity left in the vapor returning through pipe 5 to maintain the valve chamber at a sufliciently low temperature so that the possibility of its becoming gas bound is practically eliminated, or reduced to a very unobjectionable minimum,-

effect of the vapor in pipe 5, which would Stherwise be dissipated in the surrounding atmosphere, is now saved and at the same time the objectionable condensation drip from the length of pipe 5, between the cabinet and the compressor is avoided. The heat-exchanging relation thus performs three useful functions inn which are accomplished at.no.-..-greater cost .than the cost, of the extra tubing represented by the coil around the valve chamber. i The parts marked 12 are merely couplings,

.by means of which-the described device can be made up separately and then conveniently assembled in" a recess formed in the relativelythick heat-insulating"'vvall 13 of the refrigerating cabinet and then connected up into the system as indicated in the diagram.

'In this position it is covered over zby a suitable plate, not shown, and the heat-insulating material, of which the cabinet wall is made, thus assists in'protecting the valve ,chamber 15 from external atmospheric tern erature, and

thereby suflices tokeep the liquid therein below the critical temperature during the standby periods of the compressor.

For the accommodation of the-valve chamber in the position stated, it is made long as compared to its diameter, the float having substantially the same proportions as the chamber, and the whole device is thus not only kept from encroaching on the space within '25 the cabinet, but also does not project from the exterior of the cabinet, and is, at the same time, best located for performing its par ticular functions. I

Claims:

so 1. The'combination. with a refrigerating cabinet of areirig'erating circuit containing an evaporator, located in the cabinet, a device for. preventing vaporous refrigerant from entering the evaporator, said devicebeing located in theQcabinet wall and'a return vapora-li'ne 'le'ading'rfirom said evaporator inside the' cabinet into heat-absorbing relation to said device in the cabinet wall. 1 2. The combination in a refrigerating sys- 40 tom of a'condenser and an evaporator, a valve chamber, an inlet thereto from the condenser and an outlet to the evaporator, a float-operated valve in said chamber controlling the outlet, and a vapor return line from the evaporator to; the compressor, said chamber elongated in the direction of valve movenept and'said return line coiled around said chamber throughout a substantial portion of the length of the same in heat-exchanging relation therewith. v v i 3.- The combil tion in an intermittently operated compressi refrigeratin system of -a condenser,-an eva ator, a cham er having an outlet and containing a float-controlled 55. 'valve therefori the rising of the float serving to open the va ve,.a refrigerant line from the compressor to the condenser, thence to said chamber and from said chamber, under the control of the valve, to the evaporator and a return line therefrom to the compressor, said return line including a part surrounding said chamber in heat exchanging relation thereto.-

"In testimony whereof, I have signed this q specification. U

JAY G. DE REMER.

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