| 摘要 |
PROBLEM TO BE SOLVED: To appropriately add hot water according to the condition of the residual water by supplying the test making-up hot water of the prescribed quantity in a bath tub based on the temperature of the residual water, and calculating the quantity of the residual water from the difference of water temperature to be detected by a bath temperature detector before and after supplying the test making-up hot water. SOLUTION: A passing water control part 56 supplies hot water of the prescribed quantity from a hot water supplying part 20. The temperature of the residual water is detected by a bath temperature detector 39a, and the difference between the quantity of the residual water to be calculated by a residual water operating part 58 of a bath burning control part 57 and the preset value is added to supply hot water in a bath tub to the prescribed water quantity. When the temperature of the residual water is lower than the prescribed value, the residual water operating part 58 calculates the quantity of the residual water from the relationship between the heat addition and the temperature rise of hot water by the additional burning without charging the test making-up hot water. When the temperature of the residual water is higher than the prescribed value, the quantity of the residual water is calculated from the difference in water temperature to be detected by the bath temperature detector 39a before and after supplying the test making-up hot water by the passing water control part 56. |
