Patent ID: 7988431

Claim:
A variable capacity rotary compressor, comprising: a cylinder assembly; a rolling piston that performs an eccentric orbiting motion inside an inner space of the cylinder assembly; a vane that performs a linear movement in a radial direction of the rolling piston to control the rolling piston, thereby dividing the inner space into a compression chamber and a suction chamber; and a vane restricting mechanism configured to restrict the vane by applying a pressure difference directly to side surfaces of the vane, wherein the side surfaces of the vane extend in a perpendicular direction or an inclined direction with respect to a direction of motion of the vane, wherein vane restricting mechanism is configured to restrict the vane by withdrawing the vane into a vane slot formed in a cylinder of the cylinder assembly, and wherein the vane restricting mechanist composes at least one high pressure passage and at least one low pressure passage in communication with the vane slot.