| 摘要 |
An air-conditioning apparatus (100) includes: a first bypass pipe (4a) connected to an inlet-side passage of an accumulator (15) through a second expansion device (14a), a second passage of a subcooling heat exchanger (13) for exchanging heat between refrigerant flowing through the second passage of the subcooling heat exchanger (13) and refrigerant flowing through a first passage of the subcooling heat exchanger (13), and a first opening and closing device (19a); a second bypass pipe (4b) branched from the first bypass pipe (4a) between the subcooling heat exchanger (13) and the first opening and closing device (19a) and connected to an injection port of a compressor (10) through a second opening and closing device (19b); and a third bypass pipe (4c) branched from a refrigerant pipe between a heat source-side heat exchanger (12) and a use-side heat exchanger (17) and connected to a refrigerant pipe between an inlet side of the compressor (10) and an outlet side of the accumulator (15) through a third expansion device (14b). |
