| 摘要 |
PURPOSE:To prevent a chattering phenomenon of water supply operation by accumulating a bath tank water level for a predetermined time and estimating an average water level, and calculating a changing amount of the average water level for a predetermined time, and further prohibiting the water supply operation when the changing amount is a water leakage reference value, or more. CONSTITUTION:In a process where a bath tank 2 is replenished with hot water to keep a water level in the bath tank unchanged when the bath tank water level is lowered, an accumulated water level is lowered, an accumulated water level stored in a microcomputer is set to 0, and a judgement circuit flag for use in judging a water level judgement circuit is set to 0. After a predetermined time, a detection water level of a water level sensor 41 is added to the contents of the accumulated water level, and the addition operation is repeated a predetermined number of times. Thereafter, the accumulated water level is divided to estimate an average water level and store the same, which is in turn compared with a set water level in a water level setting unit. When the average water level is less than the set water level, a changing amount of the average water level is estimated. Further, it is judged whether or not the changing amount exceeds a water leakage reference value, and if it is YES, the replenishment operation is prohibited. |
