A variable capacity rotary compressor including a housing, the housing
including two compression chambers, the two compression chambers having
different capacities; a rotating shaft rotatably provided in the two
compression chambers; two eccentric units respectively provided in the
compression chambers in such a way as to be fitted over the rotating
shaft, the two eccentric units being operated so that one of the two
eccentric units is positioned eccentrically from the rotating shaft to
perform a compression operation while the other eccentric unit is
positioned concentrically with the rotating shaft to perform an idle
operation, according to a rotating direction of the rotating shaft;
roller pistons fitted over each of the two eccentric units; vanes
installed in each of the two compression chambers so as to reciprocate in
a radial direction while being in contact with an outer surface of the
roller piston; and a path control unit to control a refrigerant suction
path so that a refrigeran is provided to an inlet port of one of the two
compression chambers which performs the compression operation.