Oil cooling apparatus for refrigeration screw compressor

Details Oil cooling apparatus for refrigeration screw compressor Oil cooling apparatus for refrigeration screw compressor

1981-12-31

1983-12-13

Makay, Albert J.

Refrigeration

Automatic control

Refrigeration producer

62470, 62DIG2, F25B 3100, F25B 4302

Patent

active

044198655

ABSTRACT:
The invention relates to improvements in a refrigeration system having an oil cooled screw compressor from which mixed oil and compressed refrigerant issues to an oil separator via a discharge duct, and wherein a refrigerant pump draws liquid refrigerant from the high pressure receiver and delivers it to the discharge duct to cool the oil and desuperheat the refrigerant. The refrigerant pump and a hydraulic motor that drives it are in a single sealed housing. The hydraulic motor is energized with pressure oil from the oil pump whereby oil is returned to the compressor from the oil separator. Oil flow to the hydraulic motor is throttled in accordance with output from a temperature sensor at the discharge duct, to maintain a constant temperature of oil-refrigerant mixture passing to the oil separator. A standpipe arrangement prevents cavitation at the refrigerant pump.

REFERENCES:
patent: 2986898 (1961-06-01), Wood, Jr.
patent: 3067590 (1962-12-01), Wood, Jr.
patent: 3200603 (1965-08-01), Wake et al.
patent: 3408828 (1968-11-01), Soumerai et al.
patent: 4275570 (1981-06-01), Szymaszek et al.

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