| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent corrosion of a circuit composition material or the like by cleaning a bath reheating circuit of a heat pump hot water supply system. <P>SOLUTION: The heat pump hot water supply system is provided with a direct hot water supply circuit capable of directly carrying out hot water supply to a bathtub 9a by raising a temperature of water supplied from a water supply part via a pressure reducing means by a hot water supply heat exchanger 6 in a heat pump cycle, a support tank 8 capable of supplying stored hot water to the direct hot water supply circuit, a bypass circuit capable mixing water after hot water of the support tank 8 has been supplied to the direct hot water supply circuit, and a bath reheating circuit carrying out heat exchange between hot water of the bathtub 9a, and hot water heated by the hot water supply heat exchanger to carry out reheating. A cleaning drain mode in the bath reheating circuit is operated when the hot water in the bathtub becomes a small amount. <P>COPYRIGHT: (C)2007,JPO&INPIT |
