| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve an inconvenience of clogging of a refrigerant-water heat exchanger due to deposition of scales in a water heater provided with a heat pump unit having the refrigerant-water heat exchanger carrying out heat exchange of a high temperature coolant and water for heating water in a hot water storage tank, and a water circulation circuit circulating water between the hot water storage tank and a water passage of the refrigerant-water heat exchanger. <P>SOLUTION: In the water heater 1 provided with the heat pump unit A having the refrigerant-water heat exchanger 12 carrying out heat exchange of the high temperature coolant and water for heating water in the hot water storage tank 2, and the water circulation circuit 3 circulating water between the hot water storage tank 2 and the water passage 5 of the refrigerant-water heat exchanger 12, a washing means is provided for disposing the water in the hot water storage tank 2 after passing it through the water passage 5 of the refrigerant-water heat exchanger 12. <P>COPYRIGHT: (C)2010,JPO&INPIT |
