| 摘要 |
PROBLEM TO BE SOLVED: To increase the number of times that a quantity of hot water having an appropriate temperature is dispensed and ensure the fixed quantity by correcting the opening time of a discharging valve in accordance with the water head of a low water level at the intermediate water level. SOLUTION: A water supply pipe 6 is provided with a water supply valve 7 and a flow rate sensor 8. An upper float switch 3 and a lower float switch 4 are provided in order to control the opening/closing of the water supply valve 7 at a high water level and a low water level, respectively. When the water level is high, the upper float switch 3 opens/closes the water supply valve 7. When the water level is intermediate between the upper float switch 3 and the lower float switch 4, a quantity of supply water is decreased and the temperature of the hot water is restricted in order to lower the water level. When the water level drops to a predetermined value or below, the water supply valve 7 is opened/closed by the lower float switch 4. |
