Patent ID: 6796773
Filing Date: 2004-09-28
Classification: F04C

Abstract:
A variable capacity rotary compressor, comprising:a hermetic casing; a housing disposed in the hermetic casing and including first and second compressing chambers having different capacities; a rotating shaft rotatably disposed in the first and second compressing chambers; first and second eccentric units mounted on an outer surface of the rotating shaft in the first and second compressing chambers, respectively, the first and second eccentric units being operated in opposite manners such that when either the first or second eccentric unit is locked in an eccentric state to perform a compressing operation, the other eccentric unit is released from the eccentric state to release the compressing operation; first and second roller pistons fitted on outer surfaces of the first and second eccentric units, respectively; first and second vanes provided in the first and second compressing chambers to be radially moved while being in contact with the first and second roller pistons, respectively; and a pressure control unit to allow a discharging pressure to be applied to either the first or second compressing chamber, where an idle rotating operation is performed.