| 摘要 |
PURPOSE:To improve additional heating promoting effect, energy saving effect and safety and increase comfortable property due to the stability of hot-water temperature by inctroducing high-temperature hot-water into an additional heating circuit through a bypass circuit as a means to prevent the after boiling phenomena of supplying hot-water after the additional heating. CONSTITUTION:A forced water passing type heat exchanger 17 and a natural circulation type heat exchanger 18 are provided in a main body 16 and the heat exchanger 18 is connected to a bathtub 20 while the heat exchanger 17 is provided with a dividing unit 22 at the outlet port thereof to connect the one end thereof to a hot-water pouring pipe 23 and connect the other end thereof to a hot-water supplying cock 24. A driving unit 25 is driven depending on a difference between the detecting temperature of a temperature detector 21 and an initial temperature. When the water in the bathtub 20 is heated by the heat of the heat exchanger 18 in case of additional heating, the temperature is increased since water is existing in the heat exchanger 17. According to the temperature rise, the valve driving unit 25 is operated and the hith-temperature hot-water in the heat exchanger 17 is mixed with the hot-water in the water path 19, then, is stored in the bathtub. |
