Patent ID: 7140852

Claim:
A scroll compressor for compressing refrigerant gas containing lubricating oil comprising: a housing having a front housing and a rear housing which has a partition wall, the housing also having a suction chamber; a discharge passage formed in the housing, the discharge passage having a discharge chamber, a discharge hole and an accommodation chamber, wherein the discharge chamber and the accommodation chamber are communicated with each other through the discharge hole; a rotary shaft rotatably supported by the housing; a fixed scroll disposed in the housing, the fixed scroll having a fixed scroll base plate and a fixed scroll spiral wall that extends from the fixed scroll base plate; a movable scroll also disposed in the housing for facing the fixed scroll, the movable scroll having a movable scroll base plate and a movable scroll spiral wall that extends from the movable scroll base plate, wherein the movable scroll base plate and the movable scroll spiral wall of the movable scroll and the fixed scroll base plate and the fixed scroll spiral wall of the fixed scroll define a compression region therebetween; an oil separator provided in the accommodation chamber, the oil separator having a separation member and an oil reserved area; and an oil reservoir defined around an entire circumference of the partition wall which defines the discharge chamber therein, the oil reservoir being formed so as to communicate with the oil reserved area of the oil separator, wherein a back pressure chamber is defined in the movable scroll on the opposite side of the fixed scroll, the back pressure chamber being formed so as to communicate with the oil reserved area of the oil separator through an oil feeding passage, at least a part of a wall which forms the oil feeding passage in the rear housing being also used as a part of the partition wall.