Patent ID: 8317487
Filing Date: 2012-11-27
Classification: F04B

Abstract:
1. A reciprocating-type compressor comprising: a front side cylinder block on which front side cylinder bores are formed, a rear side cylinder block on which rear side cylinder bores are formed, a crank chamber which is formed between the front side cylinder block and the rear side cylinder block by assembling them, a shaft which goes through the crank chamber and is rotatably supported in the front side cylinder block and the rear side cylinder block, a swash plate which is provided in the crank chamber and is rotated by the shaft, double-headed pistons which are each inserted in respective cylinder bores of the front side cylinder block and the rear side cylinder block which face each other and are reciprocated by rotation of the swash plate, a space for forming a gas passage on a suction side and a space for forming a gas passage on a discharge side extending along an axial direction of the shaft and being provided in parallel outside a pitch circle of the cylinder bores in the front side cylinder block and the rear side cylinder block respectively, a gas passage on the suction side formed by connecting the space for forming the gas passage on the suction side formed in the front side cylinder block and the space for forming the gas passage on the suction side formed in the rear side cylinder block, a gas passage on the discharge side formed by connecting the space for forming the gas passage on the discharge side formed in the front side cylinder block and the space for forming the gas passage on the discharge side formed in the rear side cylinder block, a gas port on the suction side leading to the space for forming the gas passage on the suction side and being provided in one of the front side cylinder block and the rear side cylinder block, a gas port on the discharge side leading to the space for forming the gas passage on the discharge side and being provided in the other of the front side cylinder block and the rear side cylinder block, and a partition wall which partitions the space for forming the gas passage on the suction side and the space for forming the gas passage on the discharge side and is placed such that a circumferential width of the space for forming the gas passage communicated with the gas port is larger than a circumferential width of the space for forming the gas passage not communicated with the gas port in each of the front side cylinder block and the rear side cylinder block, wherein the respective partition walls are contacted with each other in the axial direction when the front side cylinder block and the rear side cylinder block are assembled.