JPS58133550A - Control device for storage type electrical hot water heater - Google Patents

Abstract

PURPOSE:To reduce the loss of radiating heat and to improve the power supply efficiency by a method wherein a hot water quantity setting means is provided so that only the required quantity of hot water is produced and the power supply load is distributed uniformly on the hot water heaters through a central control device. CONSTITUTION:An operating means 8(8') for the storage type electrical hot water heater 5(5') calculates the amount of heat to be stored on the base of a value set by a constant hot water quantity setting means 6(6') or a temporary hot water quantity setting means 7(7'), an operating menas 11(11') calculates the amount of heat of the remaining hot water on the base of the quantity and the temperature of the remaining hot water detected by means 9(9') and 10(10') and an operating means 12(12') calculates the required amount of power supply time on the base of the difference between the amount of heat detected by the means 8(8') and the amount of heat detected by the means 11(11'). Further, a signal transmitting means 13(13') for transmitting to the central control device 15 a signal designating the required amount of power up supply time and a power supply control means 14(14'') for the hot water heater 5(5') are provided in the hot water heater 5(5') and signal receiving means 16, a power supply time distribution control means 17 and a central transmitting meand 18 are provided in the central control device 15. That is, the signals disignating the required amounts of power supply time for the hot water heaters 5 and 5' transmitted from the means 13 and 13' are received by the menas 16, the powe supply hours are properly assigned to the hot water heaters after totalizing the signals by the means 17 and the power supply hours at which the hot water heaters are started are directed from means 18 to the means 14 and 14'.