| 摘要 |
PURPOSE:To shorten the hot-water filling time period by a method wherein in the case a bath water level reference point judgement element stores a reference value, hot-water supply through a bath water supply pipe is continued when hot-water is supplied through the bath water supply pipe and 'Yes' is judged by a bath water supply pipe clogging judgement device, and hot-water including the amount of additional supply is supplied at a time when 'Yes' is judged by a bath water level inflection point judgment device. CONSTITUTION:In the case of the first time hot-water supply to a bathtub 21 without a stored water level reference value, that is, in the case of test operation, automatic hot-water supply is carried out in first time mode following an automatic hot-water supply sequence. After the first mode operation finishes, a bath water level reference point judgment device 41 judges that a water level reference value is stored. When 'Yes' is judged by a bath water supply pipe clogging judgment device 38 after an automatic hot-water supply switch 35 is turned on, and no clogging in the bath water supply pipe 19 is found, automatic hot-water supply through the bath water supply pipe 19 is continued as it is. At this time, as a two-way valve 31 is closed, a water level sensor 23 is allowed to detect the water level in a bathtub 21. As the output of the water level sensor 23 begins to increase when the water level in the bathtub 21 reaches a point where a bath water return pipe 22 of a bath adapter 20 is located, a bath water level transition point judgment device 40, which has a transition point where the water level rises by 10 bits (2.5cm as water level), for example, is provided. |
