FILTER CLEANING DEVICE OF BATHTUB WATER CLEANING DEVICE

PURPOSE:To obtain a filter cleaning device of a bathtub cleaning device without requiring much labor by closing the circulation passage of bathtub water, causing high-temperature water to flow toward a filter and discharging a drain thereof to the outside. CONSTITUTION:In a cleaning state of a filter cleaning device, a water passage changeover valve 7 closes a drain pipe, and a circulation pipe 6 is opened. By rotating a pump 4, circulation water flows through a filter from the lower part to the upper part thereof, and stains are removed by the filter 3. When cleaning the filter, the pump 4 is stopped, and the water passage changeover valve 7 is changed over to open the drain pipe 5, and to close the circulation pipe 6, thereby draining water in the vicinity of the filter 3. Simultaneously, an opening and closing valve 2 is opened, and high-temperature water from a heat source 1 is caused to flow toward the filter to remove stains of the filter 3 and carry out high temperature sterilization. Stained water is discharged to the outside through a water passage changeover valve 7 and the drain pipe 5, whereby the filter can be cleaned without assistance and the cleaning can be performed sanitarily and circulation water is not stained.