| 摘要 |
<p>PURPOSE:To prevent heat loss due to natural dissipation of heat and improve the efficiency of hot-water supply by a method wherein the finishing time of conduction is closed to the finishing time of midnight electric power supply. CONSTITUTION:A heater 2 is provided at the lower part in a hot-water reserving tank 1 and a thermistor 3 is provided above the heater while the output of the thermistor 3 is inputted into a micro-computer 4. On the other hand, the micro-computer 4 outputs a control signal S1 for controlling a relay 5 while the relay 5 receives the control signal S1 and controls the conduction of the heater 2. In this case, the latest conduction finishing time among respective conduction finishing times of unit number of days, which are memorized in a memory means (a), is compared with the finishing time of midnight electric power supply and conduction starting time is amended by first amending means (b). On the other hand, when the conduction finishing time of the day, which is memorized by said memory means, is later than a predetermined time, the conduction starting time of next day is amended to be advanced by the second amending means (c).</p> |
