Patent ID: 7789641

Claim:
A rotary compressor, comprising: a compression mechanism including a cylinder having a cylinder chamber, a piston accommodated in the cylinder chamber eccentrically with respect to the cylinder, and a blade arranged in the cylinder chamber and defining the cylinder chamber into a first chamber and a second chamber, at least one of the cylinder and the piston rotating eccentrically as an eccentric rotation body; a drive shaft configured for driving the compression mechanism; a pressing mechanism configured for bringing a cylinder side end plate, which is provided at one end in an axial direction of the cylinder chamber and faces an end face in an axial direction of the piston, and a piston side end plate, which is provided at the other end in the axial direction of the cylinder chamber and faces an end face in an axial direction of the cylinder, close to each other in an axial direction of the drive shaft; and a casing configured for accommodating the compression mechanism, the drive shaft, and the pressing mechanism, the pressing mechanism generating an axial-direction pressing force with a center of the pressing mechanism being laterally offset from a center rotation axis of the drive shaft, the compression mechanism having a plurality of discharge ports configured for discharging fluid compressed in the cylinder chamber to an outside of the compression mechanism, with the discharge ports being disposed radially outwardly of the center of the pressing mechanism relative to the center rotation axis, and the center of the pressing mechanism being disposed outside a circular path centered on the center rotation axis throughout an entire rotation of the drive shaft, the circular path having a radius equal to a distance between the center rotation axis and an axial center line of the eccentric rotation body as measured perpendicularly with respect to the center rotation axis of the drive shaft, and the center of the pressing mechanism being laterally offset toward the discharge ports away from the circular path.