F - Mech Eng,Light,Heat,Weapons – 25 – B
Patent
F - Mech Eng,Light,Heat,Weapons
25
B
62/31
F25B 1/04 (2006.01) F04C 11/00 (2006.01) F04C 29/04 (2006.01) F25B 43/02 (2006.01)
Patent
CA 1167655
OIL COOLING APPARATUS FOR REFRIGERATION SCREW COMPRESSOR Abstract of the Disclosure 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 re- frigerant 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 ener- gized 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 arrange- ment prevents cavitation at the refrigerant pump.
416481
Smart & Biggar
Vilter Manufacturing Corporation
LandOfFree
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