| 摘要 |
<p>PURPOSE:To provide a hot water heater of hot water storing type in which a temperature mixing layer at a lower part of the hot water storing tank is eliminated and a desired amount of hot water can be assured without reducing a reliability of a heater. CONSTITUTION:A hot water temperature sensor 10 in a hot water feeding pipe 5 is provided. A water feeding temperature sensor 11 is arranged at a water feeding pipe 4. The hot water temperature sensor 10 has a plurality of hot water feeding temperature set values and a plurality of water feeding temperature set values corresponding to a plurality of hot water feeding-out temperature set values. A controller 12 controls the number of rotation of a pump 2 in such a manner that a detected temperature of the hot water temperature sensor 10 becomes a hot water feeding-out set value, and increases the flow rate. When a temperature detected by the water temperature sensor 11 reaches a water feeding temperature set value, the hot water feeding-out temperature set value is changed in response to the water feeding temperature set value, and when the temperature detected by the water temperature sensor 11 reaches the maximum water feeding temperature set value, the heater 3 and the pump 2 are stopped in operation.</p> |
