| 摘要 |
PROBLEM TO BE SOLVED: To provide an air conditioner capable of recovering a refrigerant in an outdoor unit without going through an indoor unit during a refrigerant recovery operation, and capable of reducing a refrigerant leakage amount even in the air conditioner in which the amount of sealed refrigerant is large.SOLUTION: When performing a refrigerant recovery operation for recovering a refrigerant in an outdoor unit 2, an outdoor expansion valve 25, a liquid refrigerant shut-off valve 51 and an indoor expansion valve 81 are closed, the refrigerant staying in an indoor unit 3 and a gas refrigerant pipeline 102 is recovered in the outdoor unit 2, and a gas refrigerant shut-off valve 52 is closed. After that, the refrigerant staying in a liquid refrigerant pipeline 101 is recovered from a bypass circuit comprising a first bypass pipe 27a, a cooling side pipeline 27d of a supercooling heat exchanger 27 and a second bypass pipe 27b, and the liquid refrigerant shut-off valve 51 is closed. Thus, the refrigerant staying in the liquid refrigerant pipeline 101 can be recovered in the outdoor unit 2 without going through the indoor unit 3, and a refrigerant leakage amount can be reduced. |
