| 摘要 |
PROBLEM TO BE SOLVED: To achieve injection for suppressing a discharge temperature even when operation efficiency is deteriorated in intermediate injection in a refrigerator using R32.SOLUTION: An air conditioning apparatus 10 using R32 refrigerant includes a compressor 20, an indoor heat exchanger 50, an outdoor expansion valve 41, an outdoor heat exchanger 30, an intermediate injection channel 65, a suction injection channel 67, and on-off valves 66, 68 for injection. The intermediate injection channel 65 joins a part of refrigerant flowing in a main refrigerant channel 11a to refrigerant of intermediate pressure of the compressor 20. The suction injection channel 67 guides a part of the refrigerant in the main refrigerant channel 11a to a suction channel 27. |
