PROBLEM TO BE SOLVED: To maintain a sterilization effect and a bacteria removing effect by chemicals by being provided with a filter device for filtering bath water, bypass piping for bypassing the filter device, and a chemical pouring device for pouring the chemicals into the bath water, and stopping a circulation of the bath water for a specified time after pouring the chemical by the chemical pouring device. ;SOLUTION: The bath water in a bathtub 50 is taken in the filter device 3 via a water intake pipe 51 with a pump 7 and filtered, then, it is heated with a heater 4 and is returned to the bathtub 50 from a water discharge pipe 52 through the chemical pouring device 5, a chemical concentration measuring device 6 and the pump 7. At this time, a timer 8 starts to measure time for a prescribed time, and simultaneously a control device 1 instructs the chemical injection device 5 to charge a specified quantity of the chemicals, and makes the display device 9 display a sterilization state and also makes the pump 7 stop the operation. Thus, the bath water is effectively sterilized. After a specified time elapses by the timer 8, the pump 7 is restarted the operation and the completion of a sterilization state is made to display by the display device 9.;COPYRIGHT: (C)2001,JPO
展开▼
