| 摘要 |
PURPOSE:To reduce the ratio of the time of combustion to the time of extinguishing fire, eliminate the possibility of sudden boiling or the like and reduce the hunting of hot-water temperature by a method wherein the hot-water temperature is controlled by the intermittent combustion of a burner through the ratio of the time of combustion to the time of extingushing the fire. CONSTITUTION:Water in the pipeline of the device is circulated by a pump 4 from a water suppling pipeline 6 to the upstream side of a water flow sensor 11 in the pipeline 6 through a heat exchanger 1, a hot-water pipeline 3 and a return pipeline 5 while the water is heated during passing through the heat excahnger 1. In this case, the intermittent combustion of the burner 7 is controlled by a control panel 14 based on the ratio of the time, in which the burner is operated, to the time, in which the fire of the burner is extinguished, therefore, the circulating water is heated up to a set temperature and is maintained in the set temperature. |
