| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a bathtub washing device capable of reliably securing a prescribed washing performance by effectively using wash solution with detergent mixed therein.SOLUTION: Even when a detection flow rate value by a flow sensor instantaneously or temporarily exceeds a lower limit value within an appropriate flow rate by switching to open a hot water feed solenoid valve, the bathtub washing device performs a determination of a flow rate stabilization condition to exclude, without switching to open a detergent solenoid valve, a peak of the detection flow rate value from a trigger condition of switching to open the detergent solenoid valve. Namely, the bathtub washing device determines that, while a flow regulating valve of a hot water supply device as a hot water feeding source is throttled and the detection flow rate value decreases, whether or not the flow rate stabilization condition that a fluctuation range of the detection flow rate value should be within a prescribed range is satisfied. The detergent solenoid valve is switched to be opened by the establishment of both conditions of the establishment of the flow rate stabilization condition and the establishment of the subsequent flow rate range condition.</p> |
