| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hot-water supply device carrying out heating of a hot water storage tank in a midnight power time zone wherein electricity cost is low. <P>SOLUTION: By providing a heating means 16 for heating water in the hot water storage tank 15 by a predetermined heating amount to carry out heating operation, and a heating control means 17 for changing the heating amount when there is operation other than the heating operation in a predetermined time, the hot water storage tank 15 can be heated in the predetermined time since the heating amount is corrected by the heating control means 17 so that the hot water storage tank 15 is heated in the predetermined time even when a heating operation condition of the hot water storage tank 15 changes, heating of the heating means 16 stops, and the heating amount changes within the predetermined time of the midnight power time zone. <P>COPYRIGHT: (C)2004,JPO |
