| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hot water storage water heater capable of avoiding shortage of hot water while suppressing the water discharge amount from the hot water storage tank. <P>SOLUTION: The hot water storage water heater 1 is equipped with a hot water storage tank 110, a feed water pipe 120, a thermistor 170 for detecting the temperature of hot water inside the hot water storage tank 110, a water discharge pipe 180, a heat pump type heating unit 200, a control unit 300, and an input part 300A for inputting data including the time for using the hot water storage water heater 1 again. The control unit 300 calculates the required tapping volume at the time of using the hot water storage water heater 1 again from the data inputted in the input part 300A. When the hot water amount in the hot water storage tank 110 is determined to be short with respect to the required tapping volume based on the detected result of the thermistor 170, the control unit 300A calculates the required hot water feed amount to the hot water storage tank 110. After the hot water inside the hot water storage tank 110 is replaced by only the required hot water feed amount, the required hot water feed amount is supplied to the hot water storage tank 110 by the heating unit 200. <P>COPYRIGHT: (C)2007,JPO&INPIT |
