US1570995A - Refrigeration - Google Patents

Description

Jan. 26 1926.

K. DE LONY REFRIGERATION Filed March 24, 1925 Patented'Jan. 26, 1926.

UNITED STATES PATENT OFFICE...

KNU'D DE 'LONY OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO JOHANNES SCHIOTT, OF

GREENS FARMS, CONNECTICUT.

. i REFRIGERATION.

' Application filed March 24, 1925. Serial No. 17,876.

I '0 all whom it may. concern Be it known that I, KNUD on LoNY, a citizen of the United States, residing at the city of NewI-I-aven, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Refrigeration; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to refrigeration and has for its object toincrease the efiiciency of refrigerator" engines of the compression type. v

The accompanying drawing shows a schematic elevation ofv a combined compression type refrigerator plant employing two compressors with my invention attached.

The invention consists in the introduction of a dilferential drive mounted in a housin 1 between the shafts a and b of thelow and high pressure compressors 2 and 3 that are driven from a common source of power by a belt 16 which turns the housing 1.

The differential drive is preferably shown herein as mechanical, but the same effect may be obtained by-other means.

4 is the evaporator, 5 the receiver and intercooler, 6 the condenser and 7 the expan sion valve, all of the'usual orknown type.

The operation is as follows y The low pressure compressor 2 draws the vaporized refrigerant from the vaporizer 4,

" compresses it to the receiver pressure and discharges it to the receiver and .intercooler 5, where the superheat is removed by a cooliug medium entering at 10 and leaving at 11'. The high pressure compressor 3 draws thevapor from the receiver 5, compresses it to the condenser pressure and discharges it to the condenser 6, whereit is liquefied by the cooling med'ium'entering at 12 and pands t'hrougl'i the expansion valve 7 to the vaporizer 4, where it is vaporized, thus coolingthe brine entering at 14 and leaving at 15.

ferential drive, thetorques on the compressor shafts a and b are equal. With the same load on both compressors they will run with the speed of the driving gear or housing 1, but as, the load changes-with a change in the saturation temperatures of the condenser r l'eavingat 13; The liquefied refrigerant ex- As the power is distributed through a dif-' or the vaporizer, due to the change in density ofthe refrigerant, the relation of the speeds of the compressors will change, but their sum will remain equal to double the speed of the driving gear. In all'instances, irrespective of the means employed to effect the differential drive; by reason of this variation of speed of the two compressors, the capacity of the plant increases automatically with an increase in the-saturation temperature of the condenser owingto the equal torque, the

fly wheels 17 and 18 serving to temporarily store the ener y, and as the engine works without throttling or so-called capacity regulation, its'superior efficiency is at once recognlzed.

The invention has been shown only in connection with a compound type, but can be attached to a two cycle type or to any refrigerator plant employing two comp-ressors.

What is claimed is 1. In a compound refrigerator having a condenser, an evaporator and two compressors with shafts driven from a common source of power, the combination of the compressor shafts with a differential drive,

distributing said powerv whereby the ratiov between the two torques imparted to each compressor is maintained constant.

2 The process of refrigeration which consists in' compressing a refrigerant in two compressors, condensing and eva orating the said refrigerant, and'in automatlcally maintaining constant the I relation between the torques delivered to the compressors.

3. In refrigerating apparatus, a condenser, an evaporator connected to the condenser and two compressors connected in series to withdraw refrigerant from the evaporator and to force it under pressure into the condenser, said'compr-essors eachprovided with a drive shaft, and means to rotate the shafts comprisinga differential drive.

4. In refrigerating apparatus, a condenser,,;'

an evaporator connected to the condenser, a

plurality of compressors connected in series between the evaporator and the condenser,

and automatic means for supplying equal torque to each of the compressors.

In testimony whereof I aflix my signat-ure hereto.

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