| 摘要 |
<p>PURPOSE:To permit to obtain the amount of hot-water in accordance with the actual needs of user every day by a method wherein the latest data of heat amount with respect to the using amount of hot-water is stored in a memory as a past record and the time of conduction of a heating body is determined based on the data. CONSTITUTION:Control is started at the same time when midnight or 23 o'clock, for example, has come and the maximum value among the latest data is called up from the memory 12 at first and necessary heat amount is set in a heat amount setter 13. On the other hand, the time of conduction of the heating body 5 is obtained in a conduction time operating unit 15. Next, feed water temperature is measured and a heat-up temperature is set by a temperature setter 14. Subsequently, the conduction time is decided whether it exceeds the half of midnight electric power supplying time or 4hr or not, then, the conduction of the heating body 5 is started at the beginning time of the midnight electric power supply. Thereafter, when a temperature sensor 9 has detected the heat-up temperature, the conduction of the heating body 5 is stopped.</p> |
