| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve COP (Coefficient of Performance) of a heat pump circuit when water is boiled. <P>SOLUTION: A heat pump type hot water feeder comprises a hot water storage tank 16 to store hot water, a heat pump circuit 9 having a compressor 5, an evaporator 6 and a condenser 8, a heat pump circulation circuit 19 which heats low-temperature water taken out of a heat pump outlet 17 formed in a lower part of the hot water storage tank 16 by the condenser 6 of the heat pump circuit 9 and returns heated high-temperature water from a heat pump return port 18 provided in an upper part of the hot water storage tank 16 into the hot water storage tank 16, and a heat utilization circulating circuit 24 which circulates high-temperature water taken out of the hot water storage tank 16 to a heat exchanger 20 and returns temperature-dropped moderate-temperature water to a moderate-temperature water return port 22 formed in a lower part of the hot water storage tank 16. The moderate-temperature water return port 22 is formed at a position higher than the water feed port 15 and the heat pump outlet 17. <P>COPYRIGHT: (C)2004,JPO |
