| 摘要 |
An apparatus includes a refrigerant circuit in which a compressor 1 that compresses a refrigerant, an outdoor heat exchanger 2 serving as a radiator that exchanges heat between the refrigerant and a heating target, an expansion valve 4 that decompresses the refrigerant by opening-degree adjustment, and an indoor heat exchanger 3 serving as an evaporator that exchanges heat between a heat-exchange target and the refrigerant are connected by pipes. The apparatus includes: an outdoor air temperature sensor 41 that detects a temperature of outdoor air serving as the heat-exchange target; a discharge temperature sensor 21 that detects a discharge temperature of the refrigerant discharged by the compressor 1; and a controller 101 that, when the controller 101 determines that a rotation speed of the compressor 1 is a maximum and the temperature of the heat-exchange target is lower than a preset temperature, controls an opening degree of the expansion valve 4 by using the discharge temperature. |
