Gas compressor

Abstract

A gas compressor includes a cylinder block, a rear side block, a front side block, a cylinder chamber segmented by the above three blocks, a rotor provided in the cylinder chamber, vane slots formed on the rotor, vanes inserted into the vane slots, and a suction hole provided on at least one of the front and rear side blocks. Refrigerant is suctioned into the cylinder chamber from the suction hole. An opening edge of the suction hole is composed of an in-chamber opening edge that locates within the cylinder chamber and an in-block opening edge that faces to a sidewall of the cylinder block. The in-chamber opening edge locates on a side of an oval inner wall away from an outer circumference of the rotor. According to the gas compressor, leaning of the vanes is restrained, so that ground damage or attrition of the blocks, vibrations and noises are restrained.

1 . A gas compressor comprising:
 a cylinder block;   a rear side block and a front side block that are disposed on both sides of the cylinder block, respectively;   a cylinder chamber that is formed in the cylinder block so as to be surrounded by the cylinder block, the rear side block and the front side block;   an oval inner wall that is formed by an inner wall of the cylinder block and faces to the cylinder chamber;   a rotor rotatably provided in the cylinder chamber;   a plurality of vane slots that is formed on the rotor;   a plurality of vanes that is inserted in the plurality of vane slots, respectively, so as to be able to reciprocate therewithin; and   a suction hole that is provided at least one of the front side block and the rear side block and through which refrigerant is suctioned into the cylinder chamber, wherein   an opening edge of the suction hole is composed of an in-chamber opening edge that locates between the oval inner wall and an outer circumference of the rotor and an in-block opening edge that faces to an sidewall of the cylinder block, and   the in-chamber opening edge locates on a side of the oval inner wall away from the outer circumference of the rotor.   
     
     
         2 . The gas compressor according to  claim 1 , wherein
 a contact portion with which a side edge of the vane contacts is provided, on at least one of the front side block and the rear side block, between the in-chamber opening edge and the outer circumference of the rotor.   
     
     
         3 . The gas compressor according to  claim 1 , wherein
 the in-chamber opening edge has an arch shape from a vicinity of a minor axis line of the cylinder chamber toward a major axis line thereof.   
     
     
         4 . The gas compressor according to  claim 1 , wherein
 the in-chamber opening edge has an arch shape, and   a center of the arch shape is offset to a rotational center of the rotor so as to distance the in-chamber opening edge gradually away from the outer circumference of the rotor.