| 摘要 |
PURPOSE:To prevent a discharge water overflow under a bathtub for making the underside and the like thereof free from fouling, and shorten drainage time by connecting the drainage hole of the bathtub to a trap via a forced draining means for forcibly discharging water from the bathtub. CONSTITUTION:When a bathtub 1 is cleaned using water remaining therein, the first switch 22 is turned on. Then, the third solenoid valve 12 opens and a pump 6 operates, thereby feeding water to a shower 18 connected to a shower connection port 17. When the remaining water is completely used, the empty condition of the bathtub 1 is detected with the first sensor 3, thereby stopping the pump 6 and closing the valve 12. Also, when the remaining water is not used, the second switch 23 is turned on. Then, the second solenoid valve 10 opens for starting drainage and when a water flow speed is detected with the second sensor 4, the first solenoid valve 8 opens and the pump 6 starts operation, thereby starting forced drainage. Also, the pump 6 may be fitted to a discharge port 2 on the bottom of the bathtub 1. |
