Abstract: A vane-type rotary refrigerant compressor adapted for use in an air conditioning system is disclosed which includes a rotor fixed on a drive shaft for rotation therewith and disposed in an elliptical chamber of a cylinder block which is enclosed by a housing and whose axial ends are closed by front and rear side plates. The rotor has a plurality of slots in which vanes are slidably received so that a plurality of compression chambers are formed during the operation of the compressor. An oil separator compartment is defined by the housing and the rear side plate, communicating with a discharge chamber into which compressed refrigerant is discharged. In the rear side plate is formed a discharge passage establishing communication between the discharge chamber and the oil separator compartment. The discharge passage has a restricted portion and a bend so as to provide resistance against the flow of the compressed refrigerant for damping its pulsating stream.

Abstract: A vane type compressor comprising a main housing with a cylinder, a front side plate covering one end of the cylinder, a front housing over the front side plate for forming a suction chamber, and a rotor inserted in the cylinder with a rotatable drive shaft extending through bosses of the front side plate and the front housing. A seal is arranged in the boss of the housing, and a check valve is arranged in the front housing at the inlet thereof. To guide the fluid in the suction chamber to the seal, to improve the lubrication of the seal, a pair of guide walls are provided on opposite sides of the check valve and between the check valve and the suction ports to constitute a passage directed to the seal. Also, a pair of ribs is extended from the front side plate toward the seal to constitute a gap, the gap overlapping the passage.