| 摘要 |
PURPOSE:To enable a use of capacity of the titled water heater in response to the actual requirement at the user side by a method wherein a required energization time to be applied to a heater is calculated in response to the actual use- record of use of volume of hot water at the user side and the starting of energization of the heater is shifted after the starting time of energization of the heater. CONSTITUTION:An energization time calculation device 13 calls the maximum value HGmax in the data stored in the memory device 12, for example, therefrom and multiplies by a constant C with a rate of mergin being added and calculates the energization time Hs (Hr) as Hs=HGmaxXC. The energization control device 15 controls the turning-ON or turning-OFF operation of the switch 10, turns ON the switch 10 after a time of (8-Hs) from the starting time of supplying an electrical power and turns OFF when the temperature sensor 9 detects the boiling point To. |
