Patent ID: 8727742

Claim:
A compressor, comprising: a housing; a valve plate fixed to one end of the housing; a cylinder block being rotatable relative to the valve plate and having a plurality of cylinder bores; a plurality of piston units disposed within the plurality of cylinder bores, respectively; a cam element fixed to the housing and being in contact with each of one end of the piston units, the cam element having an inclined cam surface; a driving shaft coupled to the cylinder block at one end thereof; and a motor fixed to an opposite end of the housing, a rotating shaft of the motor being coupled to an opposite end of the driving shaft, wherein the valve plate includes an inlet port and an outlet port communicating with an outside, and a plurality of first through-holes formed in an inner surface along a lengthwise direction of the valve plate and communicating with the inlet and outlet ports; the cylinder block comprises: a first section being received in the valve plate; and a second section having the plurality of cylinder bores disposed in a circumferential direction; the first section includes a plurality of rows of slots formed on a circumferential surface of the first section; the plurality of rows of slots have a shape that is recessed inwards from the outer circumferential surface of the first section, and are provided with second through-holes which communicate with the plurality of cylinder bores; and the positions of the rows of slots in a lengthwise direction of the first section correspond to those of the plurality of first through-holes.