| 摘要 |
PROBLEM TO BE SOLVED: To efficiently purify a bathtub water, and surely sterilize it by a method wherein a circulation channel which makes a bathtub water circulate to the inside and the outside of a bathtub by a circulation pump, is provided, and one part of the circulation channel is made into a sterilization channel equipped with a silver melting tank, and on a branch channel which becomes a by-pass for the sterilization channel, a purifying tank comprising a precision filtration membrane, is provided. SOLUTION: A circulation channel 4 which makes a bathtub water 1 circulate to the inside and the outside of a bathtub 3 by a circulation pump 2, is provided, and also, one part of the circulation channel 4 is made into a sterilization channel 6 equipped with a silver melting tank 5, and at the same time, on a branch channel 7 which becomes a by-pass for the sterilization channel 6, a purifying tank 8 comprising a precision filtration membrane is provided. Therefore, one part of the circulation channel 4 becomes the sterilization channel 6 equipped with a silver melting tank 5, and germs such as Legionella genus fungi in the bathtub water 1 which flows in the circulation channel 4 are always sterilized by a silver ion which is eluted in the silver melting tank 5, and aseptic state of the bathtub water 1 can be ensured, and an odor and a slime or the like can be prevented from occurring as well. In addition, since the purifying tank 8 comprising a precise film of a hollow yarn membrane 16 is provided in the branch channel 7, refuge and scale or the like can be efficiently filtered.
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