Oil cooling means for refrigeration screw compressor

Details Oil cooling means for refrigeration screw compressor Oil cooling means for refrigeration screw compressor

1980-06-16

1981-06-30

Capossela, Ronald C.

Refrigeration

Refrigeration producer

With lubricant handling means

62470, F25B 4302

Patent

active

042755700

ABSTRACT:
In a large refrigeration system comprising a screw compressor of controllably variable output, compressor lubricating oil, discharged from the compressor in a mixture with compressed refrigerant, is separated from the refrigerant at an oil separator from which it is returned to the compressor. Compressed refrigerant flows from the separator, through a condenser, to a high pressure receiver, where it is held for circulation through an evaporator and thence back to the compressor.
Through a bypass conduit in which a small liquid refrigerant pump is connected, condensed refrigerant from the receiver is delivered to a duct communicating the compressor discharge outlet with the oil separator inlet, to cool the oil-refrigerant mixture before it enters the separator. A thermostat senses temperature of that mixture near the separator inlet and so controls a throttling valve in the bypass conduit as to maintain that temperature substantially constant.

REFERENCES:
patent: 3710590 (1973-01-01), Kocher
patent: 3721108 (1973-03-01), Kocher
patent: 3795117 (1974-03-01), Moody, Jr. et al.
patent: 3811291 (1974-05-01), Schibbye
patent: 3848422 (1974-11-01), Schibbye
patent: 3874192 (1975-04-01), Kato
patent: 4180986 (1980-01-01), Shaw

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