| 摘要 |
<p>PURPOSE:To make it possible to constantly heat water in a required quantity and to reduce the residual hot water by constituting the titled control unit so that the set value of the quantity of hot water used, the temperature of feed water and the conditions of the residual hot water and residual water are detected based on the thus obtained data and computing the circulating water flow quantity, and a time required for power supply. CONSTITUTION:A flow quantity sensor 8 for detecting the quantity of hot water used, provided at the intermediate of a water feed tube 5 detects an integrated value by replacing the flow quantity with a pulse. A lower temperature sensor 12 detects the temperature of feed water to a hot water storage tank 1, and an upper temperature sensor 13 mainly detects the temperature of residual hot water. The set value of hot water setting means 14 for presetting the quantity of hot water to be used on the following day is input imputing means 15 as data together with the detected values from respective sensors 8, 12 and 13. The computing means 15 is composed of a microcomputer, and forms respective quantity computing parts 20, 21, 22 and 23 for computing a required calorific value, residual hot water calorific value, heating water quantity, and circulating flow quantity. Valve control means 16 controls a flow quantity control valve 18 based on the computation result in the circulating flow quantity computing part 23.</p> |
