Multistage compression type rotary compressor

Details Multistage compression type rotary compressor Multistage compression type rotary compressor

2008-02-08

2009-11-03

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Multistage

Sliding abutment

C418S060000, C418S249000, C418S270000

Reexamination Certificate

active

07611343

ABSTRACT:
An object is to provide a high inner pressure type multistage compression rotary compressor capable of avoiding beforehand generation of vane fly of a second rotary compression element and realizing a stabilized operation, the rotary compressor includes a communication path which connects an intermediate pressure region to a region having a low pressure as a suction pressure of a first rotary compression element; and a valve device which opens or closes this communication path, the rotary compressor applies a high pressure as a back pressure of an upper vane, and this valve device opens the communication path in a case where a pressure difference between the intermediate pressure and the low pressure increases a predetermined upper limit value before the intermediate pressure reaches the high pressure.

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