F - Mech Eng,Light,Heat,Weapons – 04 – C
Patent
F - Mech Eng,Light,Heat,Weapons
04
C
230/32, 230/89
F04C 18/04 (2006.01) F04C 29/02 (2006.01)
Patent
CA 1321570
SCROLL TYPE COMPRESSOR ABSTRACT OF THE DISCLOSURE An oil separating mechanism of a hermetically sealed scroll type compressor in which an inner chamber of a housing is kept at discharge pressure is disclosed. The compressor includes a drive shaft supported by a plain bearing in an inner block mem- ber. The drive shaft is operatively linked to an orbiting scroll which orbits within a stationary scroll. The drive shaft includes an axial bore extending from an open end and termination within the inner block member. A radial bore is provided near the terminal end of the axial bore and links the axial bore to a discharge chamber of the com- pressor. A helical groove is formed on the exterior surface of the supported portion of the drive shaft. The helical groove is linked to the axial bore through a radial hole formed through the supported portion of the drive shaft. The open end of the axial bore is isolatedly linked to the outlet of the compressor such that refrigerant gas flowing from the discharge chamber to the outlet must flow through the radial bores and axial bore of the drive shaft. Therefore, lubricating oil mixed within the refrigerant gas as a mist is retained at the radial bores and does not flow out of the compressor with the refrigerant gas, increasing the efficiency of the external cooling circuit.
592352
Sanden Corporation
Sim & Mcburney
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