Title:
INTERNAL MEDIUM PRESSURE TWO-STAGE COMPRESSION COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2018/199061
Kind Code:
A1
Abstract:
Provided is an internal medium pressure two-stage compression compressor which includes, as a compressing mechanism portion 30, a first compressing mechanism portion 30A which performs low-stage compression as a first stage, and a second compressing mechanism portion 30B which performs high-stage compression as a second stage. An oil feed passage 36 is formed in a suction passage 35B of the second compressing mechanism portion 30B. Refrigerant gas compressed by the first compressing mechanism portion 30A is discharged into a hermetically sealed container 10. The refrigerant gas is compressed by the second compressing mechanism portion 30B and is discharged to the outside of the hermetically sealed container 10. Oil feed from the oil feed passage 36 to a second compression chamber 34B of the second compressing mechanism portion 30B is performed by means of a pressure difference between a case internal pressure inside the hermetically sealed container 10 and the suction pressure inside of the suction passage 35B of the second compressing mechanism portion 30B. When a piston 32B is pivoting from top dead center to the position of the suction passage 35B, an enclosed space 106 is not formed between a vane 33, a cylinder 31B and a piston 32B, and therefore a set amount or more of lubricating oil can be prevented from flowing into the high-stage side compression chamber (second compression chamber 34B).
Inventors:
MATSUZAKI AKIRA
SATO TAKASHI
SATO TAKASHI
Application Number:
PCT/JP2018/016541
Publication Date:
November 01, 2018
Filing Date:
April 24, 2018
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
F04C29/02; F04C18/356; F04C23/00
Foreign References:
| JP2003254276A | 2003-09-10 | |||
| JPS57206790A | 1982-12-18 | |||
| JP2013185496A | 2013-09-19 | |||
| JP2012237197A | 2012-12-06 | |||
| JP2012087665A | 2012-05-10 | |||
| JPS5692392A | 1981-07-27 | |||
| JPS6238575A | 1987-02-19 | |||
| JP2004293333A | 2004-10-21 |
Other References:
See also references of EP 3617514A4
Attorney, Agent or Firm:
ABE Shinichi et al. (JP)
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