| 摘要 |
This freezer uses R32 and, even when the operation efficiency deteriorates due to an intermediate injection, enables injections for keeping down the discharge temperature. An air conditioning device (10) using an R32 refrigerant is provided with a compressor (20), an indoor heat exchanger (50), an outdoor expansion valve (41), an outdoor heat exchanger (30), an intermediate injection flow path (65), an intake injection flow path (67) and injection opening and closing valves (66, 68). The intermediate injection flow path (65) merges a part of the refrigerant flowing through a main refrigerant flow path (11a) with the intermediate-pressure refrigerant in the compressor (20). The intake injection flow path (67) guides a part of the refrigerant in the main refrigerant flow path (11a) to an intake flow path (27). |
