| 摘要 |
<p>PURPOSE:To contrive to save energy by a system wherein the energizing hour to the hot water quantity intended to be used the following day is calculated based upon the detected values of the feed water temperature, remaining hot water quantity within a hot water storage tank and remaining hot water temperature within said tank. CONSTITUTION:The hot water quantity intended to be used the following day is inputted to a hot water quantity setting means 5 and the thermal calorie to be stored within the hot water storage tank before midnight energizing time ends is calculated based upon the detected values of a feed water temperature sensor 6 just after the entry of midnight energizing time zone and of a remaining hot water quantity sensor 7 and further of a remaining hot water temperature sensor 8 by means of an arithmetic unit 7. In addition, an arithmetic unit 10 calculates the thermal calorie remaining in the hot water storage tank as remaining hot water. Furthermore, an arithmetic unit 11 calculates the required energizing hour. A timer unit 12 starts counting from the starting time of energizing and stops energizing at the time the required energizing hour is reached. In such a manner as described above, various radiation losses are reduced, resulting in contriving to save energy.</p> |
