Patent ID: 8419395
Filing Date: 2013-04-16
Classification: F01C,F04C

Abstract:
1. A compressor comprising: a compression mechanism configured to be disposed in a refrigerant circuit in which a refrigeration cycle is performed, the compression mechanism including at least one lower-stage compression chamber and at least one higher-stage compression chamber, the lower and higher stage compression chambers being arranged and configured such that refrigerant compressed in the lower-stage compression chamber is further compressed in the higher-stage compression chamber; and an intermediate injection pipe connected in the refrigerant circuit, the intermediate injection pipe being arranged and configured to inject intermediate-pressure refrigerant of the refrigerant circuit between the lower-stage compression chamber and the higher-stage compression chamber, the compression mechanism further including the intermediate back pressure chamber being formed on a back side of the movable end plate section of at least one of the first mechanism section and the second mechanism section, the lower-stage compression chamber being formed only in the first mechanism section; the higher-stage compression chamber being formed only in the second mechanism section; and the intermediate back pressure chamber being formed on the back side of the movable end plate section of the second mechanism section.