| 摘要 |
PURPOSE:To always detect the hot-water temperature accurately by a method wherein when it, is judged that one enters the bathtub as the water level in a bathtub increases more than a specified value within a specified time period, after hot-water supply to the bathtub is completed, and one enters the bathtub, and when it is judged that one comes out of the bathtub as the water level drops below the specified water level, a pump is operated and the hot-water temperature in the bathtub is checked. CONSTITUTION:A water level sensor 16 provided on a return pipe 15 detects whether or not the water level of a bathtub 14 reaches a set water level. In additional heating mode operation, a three-way valve 10 is turned in the direction shown by an arrow (b), and the bath water heated by a bath heat exchanger 12 is circulated by a pump 17 through a supply pipe 13, the bathtub 14, the return pipe 15, the three-way valve 10 and the bath heat exchanger 12. A bath remote controller 18 is provided with knobs 32 and 33, by which the set hot-water temperature and the set water level are changeable, and a heating completion indicating lamp 19. After bath water heating finishes, signals are input from a water level sensor read-out device 18a, which reads out the water level at every specified time, and a water level sensor output comparator 18b, and a water level sensor output increase-decrease judgment device 18c judges whether one enters the bathtub or comes out of the bathtub according to a sharp increase or decrease in the water level within a specified time period. |
