| 摘要 |
PROBLEM TO BE SOLVED: To secure a function of lowering a discharge temperature of a compressor while suppressing an increase in size of a heat exchanger for injection.SOLUTION: An air conditioning device 10 which uses an R32 refrigerant includes a compressor 20, an indoor heat exchanger 50, an outdoor expansion valve 41, an outdoor heat exchanger 30, a branch pipe 62, a motor-operated valve 63 and a heat exchanger 64 for injection, a high-pressure receiver 80, etc. The heat exchanger 64 exchanges heat between a refrigerant flowing in a main refrigerant flow passage 11a and a refrigerant having passed through the motor-operated valve 63 of the branch pipe 62. A first injection flow passage 65 guides a refrigerant having flowed through the branch pipe 62 and exited from the heat exchanger 64 to the compressor 20. A second injection flow passage 82 guides a refrigerant gas component of the high-pressure receiver 80 to the compressor 20. |
