Title:
SPIRAL ROTARY COMPRESSOR AND CLOSED LOOP COOLING DEVICE
Document Type and Number:
Japanese Patent JPS6040794
Kind Code:
A
Abstract:
A compressor (20) is connected in series with a condenser (24) and an evaporator (26), in that order, with the evaporator (26) at a raised position relative to the compressor (20) and utilizes a vaporizable refrigerant which is miscible with the lubricating oil employed. Helical screw rotors (18, 44) are driven by the engine (12) of a bus through a clutch (14) and are mounted within parallel intersecting bores (40, 42) within the compressor housing (28). A slide valve (52) sliding in a recess (54) forms a portion of the screw compressor envelope and the rotors (18, 44) open to a suction port (72) connected to the outlet side of the evaporator (26). A high pressure discharge port (68) leads to an auxiliary chamber (86) including an oil separator (88) and bearing an unload cylinder (66) which drives the slide valve (52) and which opens to a discharge port (92) leading to the condenser (24). An oil drain passage (96) leads from the auxiliary chamber (86) to an oversized oil sump (32) and a further drain passage (104) leads through a drainage check valve (113) to the sump (32).
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Inventors:
DEBUITSUDO ENU SHIYOU
KURIFUOODO TEII BARUKUREE
KURIFUOODO TEII BARUKUREE
Application Number:
JP14155984A
Publication Date:
March 04, 1985
Filing Date:
July 10, 1984
Export Citation:
Assignee:
DUNHAM BUSH INC
International Classes:
B60H1/32; F04C18/16; F04C28/28; F04C29/02; F25B1/047; (IPC1-7): F04C29/02; F04C29/10; F25B1/00
Attorney, Agent or Firm:
Kiyotaka Sasaki