| 摘要 |
PROBLEM TO BE SOLVED: To greatly reduce power consumption consumed during standby time, while securing reliability of a compressor.SOLUTION: A use side heat exchanger 21 and a heat source side heat exchanger 43 function as a condenser or an evaporator. A compression mechanism 31 is configured by a main compressor 32 and a sub compressor 33 for compressing a cooling medium in a cooling medium circuit 10a being connected in parallel. A bypass passage 60 is a cooling medium passage for bypassing the cooling medium discharged from the main compressor 32. A heating unit 62 is arranged in the bypass passage 60, and heats the sub compressor 33 by the cooling medium discharged from the main compressor 32. A heat source side control unit 70 makes the heating unit 62 perform an operation of heating the sub compressor 33 before starting the sub compressor 33 or during stop preparation control of the compression mechanism 31. |
