Patent ID: 8991296
Filing Date: 2015-03-31
Classification: F04B

Abstract:
1. A compressor for compressing refrigerant gas containing oil, the compressor comprising: a cylinder block; a rear housing member jointed to the cylinder block; a valve/port forming member located between the cylinder block and the rear housing member, wherein the rear housing member and the valve/port forming member define a discharge chamber into which compressed refrigerant gas is discharged and a suction chamber; a discharge passage formed in the rear housing member and connected to the discharge chamber, wherein the discharge passage extends parallel with a longitudinal axis of a drive shaft of the compressor and has an opening that opens into the discharge chamber; a lid attached to the opening of the discharge passage to partition the discharge passage from the discharge chamber, wherein the lid is formed separately from the rear housing member; an oil separator provided in the discharge passage, wherein a separation chamber is formed between the oil separator and the lid; an introduction passage formed in the rear housing member for introducing the refrigerant gas from the discharge chamber to the separation chamber, the introduction passage having an outlet that opens into the separation chamber, wherein the oil separator separates oil from the refrigerant gas introduced into the separation chamber; an oil reservoir provided around the lid, the oil reservoir being connected to the separation chamber to reserve oil separated from the refrigerant gas; a reservoir chamber for reserving the separated oil, wherein the reservoir chamber is connected to a low pressure zone in the compressor the pressure of which is lower than that in the discharge chamber; and an oil passage formed in the rear housing member and connecting the oil reservoir with the reservoir chamber, the oil passage having an inlet that opens into the discharge passage, wherein the lid is arranged perpendicularly to the longitudinal axis of the drive shaft and faces the valve/port forming member with the discharge chamber located between the lid and the valve/port forming member, and the lid has a first surface that is exposed to the discharge chamber and an opposite second surface that is exposed to the separation chamber, wherein the inlet of the oil passage is spaced apart from the outlet of the introduction passage toward the lid along the longitudinal axis of the drive shaft in the discharge passage.