| 摘要 |
<p>PURPOSE:To permit to eliminate the delay of flow amount control in accordance with the switching of the amount of heating and prevent boiling by a method wherein the flow amount is increased or decreased proportionally to the amount of heating simultaneously with the switching of the amount of heating. CONSTITUTION:A heat exchanger 4 is heated by a heating device, 1 capable of switching the amount of heating threof, and the flow amount of water, passing through the heat exchanger 4 per unit time, is increased or decreased in accordance with a difference between the hot-water temperature at the outlet side of heat exchanger 4 and a desired set temperature so that the former approaches the latter. The flow amount of water is increased proportionally to the amount of heating when the same is increased. On the contrary, the flow amount of water is decreased proportionally when the amount of heating is decreased. According to this method, the delay of flow amount control, accompanying the switching of the amount of heating, may be eliminated and the pulsation of hot-water temperature may be minimized since the ratio of the flow amount to the amount of heating becomes the same before and after the switching of the amount of heating.</p> |
