| 摘要 |
<p>PURPOSE:To permit a control capable of coping with the change of hot-water set temperature or the delivery of hot-water promptly by a method wherein the operation of necessary conduction time, which is effected in an operator, is effected repeatedly and continuously during a time in which the conduction of midnight electric power is being effected and the conduction of an exothermal body is not being effected. CONSTITUTION:When the conduction of midnight electric power is started, a midnight electric power detecting circuit 7 detects it and the count of a nighttime timer (HN) is started in a timer unit 8a. A water temperature (TW) and the hot-water set temperature (TS), detected by a temperature regulating volume 5, are taken into a miro- computer 8 and the necessary conduction time (HS) and the shift time (HP) of conduction starting are operated in an operator 8b. When a condition HN>=HP is established, a signal is outputted from the micro-computer 8 into a heater driving circuit 9 and the conduction of a heater is started. When the condition HN>=HP is not established, the operations are returned to a starting point again, the decision of the conduction of midnight electric power is repeated and the shift time (HP) of conduction is renewed successively in accordance with the advance of the count of the nighttime timer (HN).</p> |
