Patent ID: 8162636

Claim:
A scroll type compressor having a housing, a rotary shaft, a discharge chamber and a suction chamber comprising: a fixed scroll member fixed to the housing; a movable scroll member compressing refrigerant gas flowed from the suction chamber by the orbital movement of the movable scroll member due to the rotation of the rotary shaft and discharging the compressed refrigerant gas, and disposed in facing relation to the fixed scroll member; an oil reservoir collecting lubricating oil, and disposed in the housing; a back-pressure chamber in communication with the discharge chamber, and disposed behind the movable scroll member; an oil extraction passage connecting the back-pressure chamber to the oil reservoir, and having a regulating valve or a throttle; an oil return passage connecting the oil reservoir to the suction chamber; a flow passage connecting the oil reservoir to the suction chamber, and introducing excess lubricating oil into the suction chamber when the level of lubricating oil in the oil reservoir becomes higher than a predetermined level; and a partition wall disposed in the oil reservoir between an opening of the oil extraction passage and an opening of the flow passage for restricting lubricating oil from the oil extraction passage other than the excess lubricating oil collected in the oil reservoir from flowing to the flow passage.