| 摘要 |
<P>PROBLEM TO BE SOLVED: To heighten COP of a heat pump by discharging the heat of water of intermediate temperature to hot water in a bathtub to lower the temperature of the water of intermediate temperature near the water supply temperature, and feeding the same to a heat pump going pipeline even when water of intermediate temperature remains in the start of hot water storage. <P>SOLUTION: A bath circulating circuit is formed by connecting a hot water storage tank 2 to which the heat pump going pipe 9 and a heat pump return pipe 10 are connected to store hot water, a heat pump type heating mans 3 for heating hot water in a hot water storage tank 2, a heat pump circulating circuit connecting the hot water storage tank 2 and the heat pump type heating means 3 to circulate hot water, a heat pump circulating pump 16 provided in the heat pump circulating circuit to circulate hot water, a bath heat exchanger in the hot water storage tank and the bathtub 6 using a bath going pipe 21 and a bath return pipe 23. The bath circulating circuit is provided with a bath circulating pump 22, the bath going pipe 9 is provided with a three-way valve A27, the three-way valve A and the bath return pipe are connected to form a bath by-pass circuit 28, an intermediate temperature water heat exchanger 31 making heat exchange with the bath going pipe is provided on the downstream side of the three-way valve A, the heat pump going pipe is provided with a three-way valve B, and the center of the hot water storage tank, the intermediate temperature hot water heat exchanger and the three-way vale B are connected to form an intermediate temperature water circuit 30. <P>COPYRIGHT: (C)2008,JPO&INPIT |
