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Title:
2-CYLINDER, 2-STAGE COMPRESSION TYPE ROTARY COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2001/069087
Kind Code:
A1
Abstract:
A 2-cylinder, 2-stage compression type rotary compressor of internal intermediate pressure type, comprising an electric motor part (14) stored in a closed container (12) and upper and lower cylinders (40) and (42) driven by the rotating shaft (16) of the electric motor part (14), wherein upper and lower rollers (48) and (50) fitted to upper and lower eccentric cams (44) and (46) provided on the rotating shaft (16) are rotated eccentrically in the cylinders, the insides of the cylinders are partitioned through upper and lower vanes (52) and (54), and a low-stage side compression part and a high-stage side compression part sucking and compressing refrigerant gas are provided and an intermediate partition plate (38) having an inner diameter hole (36) formed therein allowing the rotating shaft (16) to be inserted is provided between these compression parts, and the center of an inner diameter hole (36a) in the intermediate partition plate facing the upper roller is shifted to 90±45° in the rotating direction of the rotating shaft (16) relative to the center of the rotating shaft and on the basis of the position of the upper vane and the center of the inner diameter hole (36b) in the intermediate partition plate facing the lower roller is shifted to 270 to 360° in the rotating direction of the rotating shaft (16) for setting the intermediate plate, whereby the overlapped area of the upper and lower rollers and the intermediate partition plate can be increased at a portion where a pressure difference is increased and the leaked gas amount can be reduced so as to increase a volume efficiency and a compression efficiency.

Inventors:
EBARA TOSHIYUKI (JP)
TADANO MASAYA (JP)
YAMAKAWA TAKASHI (JP)
ODA ATSUSHI (JP)
Application Number:
PCT/JP2001/002074
Publication Date:
September 20, 2001
Filing Date:
March 15, 2001
Export Citation:
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Assignee:
SANYO ELECTRIC CO (JP)
EBARA TOSHIYUKI (JP)
TADANO MASAYA (JP)
YAMAKAWA TAKASHI (JP)
ODA ATSUSHI (JP)
International Classes:
F04C18/356; F04C23/00; F04C27/00; F04C29/00; F04C18/344; (IPC1-7): F04C23/00
Foreign References:
JP2000054975A2000-02-22
JPH11118272A1999-04-30
JPH0114787Y21989-04-28
Other References:
See also references of EP 1195526A4
Attorney, Agent or Firm:
Monda, Makoto (Monda & Associates Sueyoshi Bldg. 5F 10-5, Shinbashi 2-chome Minato-ku Tokyo, 105-0004, JP)
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