| 摘要 |
<p>PURPOSE:To make it possible to constantly feed hot water of a predetermined temperature and to prevent unnecessary water from being left standing thereby to reduce thermal loss due to spontaneous heat radiation by detecting the amount of feed water to a hot water storage tank, the amount and temperature of remaining hot water, and calculating the necessary amount of hot water from these data to store hot water. CONSTITUTION:A time switch 7 is turned ON, and power from a power source 7 is supplied. Next, respective temperature sensors 15 and 16 detect a feed water temperature Tw deg.C and remaining hot water temperature Tz deg.C, and the remaining hot water amount Vu is detected by a remaining hot water amount measuring part 22. Based on these detected values, computing means 20 calculates a circulating amount Qo, and a power supply required time Ho. Next, the opening degree of a flow amount adjusting valve 30 is controlled by means of flow amount control means 27, and the power supply to the heating element 2 of a heating device 14 and a pump 13 is started. Next, whether the time Ho has passed after the time switch 7 has been turned ON is monitered by an internal timer, and if it has passed, power supply control means 28 stops power supply to the heating device of an the pump 13.</p> |
