| 摘要 |
<P>PROBLEM TO BE SOLVED: To preferentially utilize water of intermediate temperature, and to improve usability and COP by securing stable hot water temperature in a narrow temperature range. <P>SOLUTION: This hot water storage type water heater comprises a control portion 134 having a first mixing control mode for controlling mixing by a first mixing valve 120 and use-side mixing valves 122, 125 at predetermined valve opening and closing speeds, and a second mixing control mode for controlling mixing in a state of reversing the relationship of the valve opening and closing speeds of the first mixing valve 120 and the use-side mixing valves 122, 125 with respect to the first mixing control mode, switching the first mixing control mode and the second mixing control mode under a predetermined condition when the use-side mixing valves 122, 125 are separately used, and applying the first mixing control mode when both are simultaneously used. <P>COPYRIGHT: (C)2007,JPO&INPIT |
