| 摘要 |
An air conditioning device (10) is provided with a refrigerant circuit (20) which is formed by sequentially connecting a compressor (21), an indoor heat exchanger (22), a first expansion valve (23), a gas-liquid separator (24), a second expansion valve (26), and an outdoor heat exchanger (27) and which performs a two-stage expansion type refrigeration cycle. The refrigerant circuit (20) is provided with: a gas injection pipe (2c) through which an intermediate-pressure gas refrigerant from the gas-liquid separator (24) flows into the intermediate port of the compressor (21); and a liquid-gas heat exchanger (25) in which a low-pressure gas refrigerant evaporated in the outdoor heat exchanger (27) and flowing toward the compressor (21) exchanges heat with the intermediate-pressure refrigerant flowing from the gas-liquid separator (24) toward the second expansion valve (26). |
