Vertical axis hermetic helical screw rotary compressor with disc

Details Vertical axis hermetic helical screw rotary compressor with disc Vertical axis hermetic helical screw rotary compressor with disc

1984-06-11

1985-10-08

Croyle, Carlton R.

Pumps

Motor driven

Including means utilizing pump fluid for augmenting cooling,...

417372, 418 15, 418201, 62513, F04B 3902, F04B 3906, F04C 18107, F25B 4100

Patent

active

045457425

ABSTRACT:
A vertical axis hermetic compressor includes an inner cylindrical housing fixed internally of a sealed outer enclosure bearing paired helical screw rotors defining with the inner housing closed thread compressor compression chambers. An electrical drive motor overlies the rotors and is shaft connected to one of the rotors. Compressed refrigerant vapor, where refrigerant is the working fluid, discharges through the motor rotor. A deflector within the top of the outer enclosure such that oil impacted by gas flow discharging axially from the motor adheres to the deflector to provide oil separation. Oil dropping from the deflector into the bottom of the outer enclosure functioning as an oil sump impacts against a two passage parallel flow dual transfer tube including one passage supplying liquid refrigerant from the condenser to the compressor working space for cooling the same through a liquid injection port and within a second passage, intermediate pressure refrigerant vapor injected into the compression process through a vapor injection port. This prevents excessive heating of the working fluid pulsing in the tubes during compression with control valves in the passages leading to the liquid injection and vapor injection ports closed.

REFERENCES:
patent: 2048218 (1936-07-01), Philipp
patent: 4030315 (1977-06-01), Harnish
patent: 4478054 (1984-10-01), Shaw et al.

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