| 摘要 |
<p>PURPOSE:To reduce the loss of heat readiating from hot water and to improve the power supply efficiency by a method wherein a required hot water quantity setting device and a remaining hot water condition detecting device are provided in each of the titled hot water heaters so that hot water is not produced in excess of the required quantity thereof and the power supply load is allotted evenly to each of the hot water heaters through a central control device. CONSTITUTION:The amount of heat to be stored in the electrical hot water heater 5(5') is calculated by an operator 12 in the central control device 11 on the bases of the values set by a temporary hot water quantity setting device 7(7') and a constant hot water quantity setting device 6(6') in the hot water heater 5(5'), the amount of heat of the hot water remaining in the hot water heater 5(5') is detected by an operator 13 on the bases of the values detected by a remaining hot water quantity detecting devide 8(8') and a remaining hot water temperature detecting device 9(9') and the requried amount of time of power supply to the hot water heater 5(5') is operated by an operator 14 on the basis of the difference between the amount of heat obtained by the operator 12 and that obtained by the operator 13. Further, a timer 10(10') in the hot water heater 5(5') is concentrically controlled by a timer control device 15 so that the required amount of power supply time is allotted properly to the hot water heater 5(5'). Consequently, the heat radiation loss is reduced and the power supply efficiency is improved.</p> |
