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1. (WO2018199061) INTERNAL MEDIUM PRESSURE TWO-STAGE COMPRESSION COMPRESSOR

Pub. No.:    WO/2018/199061    International Application No.:    PCT/JP2018/016541
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Wed Apr 25 01:59:59 CEST 2018
IPC: F04C 29/02
F04C 18/356
F04C 23/00
Applicants: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
パナソニックIPマネジメント株式会社
Inventors: MATSUZAKI Akira
松崎 章
SATO Takashi
佐藤 孝
Title: INTERNAL MEDIUM PRESSURE TWO-STAGE COMPRESSION COMPRESSOR
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).