| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot water storage water heater capable of suppressing an increase in power peak due to simultaneous operation with another electric appliance.SOLUTION: A hot water storage water heater comprises: a hot water storage tank; heating means having variable heating capability for heating water; and operation planning means planning a midnight heat storage operation for accumulating a demanded heating value in the hot water storage tank by storing hot water heated by the heating means in a midnight zone in the hot water storage tank, the operation planning means planning the midnight heat storage operation so as to set an allowable maximum capability of the heating means in remote time zones that are time zones before and after a proximate time zone to be lower than an allowable maximum capability of the heating means in the proximate time zone, the time zone being a time zone including power bottom time at which power consumption of other electric appliances is minimum, and to preferentially allocate operation time to the proximate time zone over the remote time zones.SELECTED DRAWING: Figure 4 |
