| 摘要 |
A refrigerant circuit 100c of a heat pump water heater 100 has a compressor 1, a four-way valve 2, a water heat exchanger 3, a heat storage transfer pipe 7 contained in a heat storage water tank 8, an expansion valve 4, and an air heat exchanger 5 and forms a refrigerating cycle by sequentially connecting them. A water circuit 100w of the heat pump water heater 100 has a water inlet pipeline 11 that supplies water to the water heat exchanger 3, a hot water tank 13, and a water outlet pipeline 12 that allows the water heat exchanger 3 to communicate with the hot water tank 13, in which water is supplied to the heat storage water tank 8 through a heat storage water tank water feed pipe 14 branching from the water inlet pipeline 11 (by opening a heat storage water tank water feed opening/closing valve 15) and the water in the heat storage water tank 8 can be discharged through the heat storage water tank water discharge pipe 22 (by opening a heat storage water tank water discharge opening/closing valve 23). |
