Patent ID: 7775782

Claim:
A variable capacity rotary compressor comprising: a housing having a compression chamber; a compression element installed in the compression chamber, the compression element being connected to a motor element through a rotating shaft; a vane moving backwards and forwards in a radial direction of the compression chamber and partitioning the compression chamber; a vane guide slot formed in the housing in order to guide operation of the vane; and a vane controller controlling the operation of the vane in order to vary compression capacity, wherein the vane controller includes a control valve that switches a fluid channel so as to selectively apply discharge pressure and intake pressure to the vane guide slot, a connection channel that connects the control valve with the vane guide slot, a high-pressure channel that connects the control valve with a discharge side of the compressor, and a low-pressure channel that connects the control valve with an intake side of the compressor, and a throttle section that reduces the fluid channel of at least one of the high-pressure channel and the connection channel in order to reduce an initial discharge pressure applied to the vane guide slot, the vane controller includes a connection pipe forming the connection channel, a high-pressure pipe forming the high-pressure channel, and a low-pressure pipe forming the low-pressure channel, and the throttle section includes a throttle pipe that is connected to at least one of the high-pressure pipe and the connection pipe and has an inner diameter smaller than that of any one of the high-pressure pipe and the connection pipe.