| 摘要 |
Provided is a heat pump device (40) configured to collect heat both from outside air and another heat source. A controller (30) calculates heat exchange amounts with use of heat exchange performance of each of an air heat-source heat exchanger (5a) and an underground heat-source heat exchanger (5b) in addition to an outside air temperature and an underground temperature. Then, in switching between a simultaneous operation of causing refrigerant to flow through both of the air heat-source heat exchanger (5a) and the underground heat-source heat exchanger (5b) and a single operation of selecting the air heat-source heat exchanger (5a) or the underground heat-source heat exchanger (5b) to cause refrigerant to flow therethrough, the controller (30) selects a heat source having a larger calculated heat exchange amount. In this manner, an appropriate heat source suitable for operation conditions can be selected. |
