| 摘要 |
A compressor with a compression mechanism whose displacement can be varied by discharging a part of a refrigerant in a compression chamber through a bypass passage. A bypass passage opening opened to the compression chamber has a sufficient degree of opening area. The compressor (20) has a low stage-side compression mechanism (40a) having both a low stage side cylinder (41a) and a low stage-side piston (47a) and compressing the refrigerant in a low stage-side cylinder chamber (42a). A bypass passage (66) is provided in the low stage-side compression mechanism (40a). The upstream end of the bypass passage (66) is opened to the low stage-side cylinder chamber (42a) and discharges a part of the refrigerant from the low stage-side cylinder chamber (42a) to return it to the suction side of the low stage-side compression mechanism (40a). The cross-section of the bypass passage (66) at the upstream end is elongate in the circumferential direction of a rotating axis (X). |
