Patent ID: 8251683

Claim:
A variable capacity rotary compressor comprising: a casing; a cylinder assembly installed inside the casing and having a compression space; a rolling piston eccentrically rotated in the compression space of the cylinder assembly; a vane coming in contact with the rolling piston to perform a linear reciprocation in a radial direction and thus divide the compression space of the cylinder assembly into a suction chamber and a discharge chamber; and a vane restricting device for restricting the vane by applying a pressure onto a side face of the vane, wherein a sectional area A of a passage through which the restriction pressure is applied to the side face of the vane is formed so as not to be larger than a vane area B of the vane to which the restriction pressure is applied through the passage, wherein the passage comprises: a first passage for connecting an inner space of the casing to a vane slot which is provided in the cylinder assembly and has the vane slidably inserted therein; and a second passage for connecting the vane slot to an inlet which is connected to the suction chamber of the cylinder assembly.