| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat pump device capable of suppressing evaporation pressure of a heat exchanger when a heat exchange target of the heat exchanger acting as an evaporator in defrosting is high temperature hot water, and capable of maintaining reliability of the heat pump device. SOLUTION: The heat pump device has a heat pump cycle A constituted by a compressor 100, a four-way valve 200, a refrigerant-water heat exchanger 300, an expansion valve 400, and an outdoor heat exchanger 500 using outside air as a heat source. During defrosting for removing frost on the outdoor heat exchanger 500, the four-way valve 200 is switched, and the flow direction of the refrigerant is opposite from the one in heating, and an opening of the expansion valve 400 is adjusted based on detection information having a correlation with a temperature of hot water flowing in the refrigerant-water heat exchanger 300, for example, a condensation temperature of the refrigerant-water heat exchanger 300. COPYRIGHT: (C)2011,JPO&INPIT |
