| 摘要 |
PURPOSE:To set a water level while detecting its surface level even during additional burning in both forward and return tubes in a short time, and to perform automatic cleaning by connecting the forward tube of an additional burning circulation conduit to a cleaning nozzle, branching a return tube to the bottom and the wall of a bathtub as first, second return branch tubes, providing a water level sensor in the first branch tube, and providing cleanser pouring means in the conduit. CONSTITUTION:Cleaning nozzles 18a, 18b are mounted at the opposed sidewalls of a bathtub 1, and cleanser from a forward tube 6 is injected in the bathtub. A return tube 5 is provided with return tube switching valves 20, 21, branched to first, second return branch tubes 22, 23, connected at the return circulation port of the tube 22 to a drain tube 16, and provided with a pressure sensor 8 as a water level sensor in the tube 22. A cleanser supply tube 26 connected to the tube 5 is connected to a cleanser tank 28 through a cleanser switching valve 27 such as a solenoid valve to constitute cleanser pouring means. They are controlled by a controller 44 together with a burning unit 43 as a cleaning unit 31. |
