ROTARY COMPRESSOR

摘要

A rotary compressor (100) is provided with a compression mechanism (3), a motor (2), an intake channel (14), a back pressure chamber (18), a feedback channel (16), an inverter (42), and a controller (44). A lead valve-type non-return valve (73) for opening and closing a feedback port (3c) of the compression mechanism (3) is disposed inside the back pressure chamber (18). The feedback channel (16) performs the role of returning working fluid from the back pressure chamber (18) to the intake channel (14). A volume-varying valve (17) is provided to the feedback channel (16), and the volume-varying valve (17) allows the working fluid to flow through the feedback channel (16) when the intake volume of the compression mechanism (3) needs to be relatively small, and the volume-varying valve (17) stops the working fluid from flowing through the feedback channel (16) to increase the pressure in the back pressure chamber (18) when the intake volume needs to be relatively large.