| 摘要 |
PROBLEM TO BE SOLVED: To further reduce compression torque during reheating operation, in a two-stage compressor connected to a refrigerant circuit having a low temperature heat exchanger.SOLUTION: A two-stage compressor (10) includes a low-stage-side compression section (30) for compressing a refrigerant of a refrigerant circuit (70); a high-stage-side compression section (40) for further compressing the refrigerant compressed in the low-stage-side compression section (30); a common rotary shaft (23) for driving the low-stage-side compression section (30) and the high-stage-side compression section (40); and a reduction mechanism (4) for, during reheating operation, reducing the amount of refrigerant to be sucked to the high-stage-side compression section (40) after compression in the low-stage-side compression section (30) as compared to during heating operation. |
