Patent ID: 7566204

Claim:
A multicylindrical rotary compressor comprising: a sealed container in which a driving element and first and second rotary compression elements driven by a rotation shaft of the driving element are contained, the first and second rotary compression elements including: first and second cylinders; first and second rollers engaged with eccentric portions formed on the rotation shaft to rotate eccentrically in the respective cylinders, respectively; and first and second vanes which abut on the first and second rollers to divide each cylinder into a low-pressure chamber side and a high-pressure chamber side, the compressor being constituted to be usable by urging the only first vane with respect to the first roller by means of a spring member, and switching a pressure to be applied to a back-pressure chamber of the second vane to switch a first operation mode in which both of the rotary compression elements perform compression works and a second operation mode in which substantially the only first rotary compression element performs the compression work, wherein the pressure in the back-pressure chamber of the second vane is discharged to the low-pressure chamber side in the second cylinder in a case where the first operation mode is switched to the second operation mode.