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Title:
TWO-CYLINDER TYPE TWO-STAGE COMPRESSION ROTARY COMPRESSOR
Document Type and Number:
Japanese Patent JP3723408
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To increase the rigidity strength of the coupling of upper and lower eccentric parts, to prevent the occurrence of elastic deformation of a rotary shaft, and to improve reliability of a rotary compressor.
SOLUTION: A two-cylinder type two-stage compression rotary compressor 10 is provided in an enclosure container 12 with upper and lower cylinders 38 and 40 driven by an electric motor part 14 and the rotary shaft 16 of the electric motor part. The interior of the upper and lower cylinders is partitioned by upper and lower rollers 46 and 48 engaged with upper and lower eccentric parts 42 and 44 for eccentric rotation situated on the rotary shaft and the interior of each of the cylinders is partitioned by upper and lower vanes 50 and 52. The compressor contains a compression part 32 on the low stage side to suck and compress and discharge refrigerant gas, a compression part 34 on the high-stage side, and an intermediate plate 36 inserting through a rotary shaft situated between the two compression parts. Upper and lower eccentric parts situated on the rotary shaft have a phase difference of 180°. The sectional shape of a coupling part 90 to intercouple the two eccentric parts forms a non-circular shape having thickness in a direction orthogonal to an eccentric direction being increased to a value higher than thickness in an eccentric direction. Further, its sectional area is increased to a value higher than the sectional area of the rotary shaft.


Inventors:
Ebara, Toshiyuki
Imai, Satoru
Tadano, Masaya
Oda, Atsushi
Yamakawa, Takashi
Application Number:
JP2000000097487
Publication Date:
December 07, 2005
Filing Date:
March 31, 2000
Export Citation:
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Assignee:
SANYO ELECTRIC CO LTD
International Classes:
F04C23/00; F04C11/00; F04C18/356; F04C29/00; (IPC1-7): F04C23/00; F04C18/356; F04C29/00
Domestic Patent References:
JP1247785A
JP3179192A
JP53111512A
JP2176192A
Attorney, Agent or Firm:
芝野 正雅