| 摘要 |
PROBLEM TO BE SOLVED: To sustain purifying function by disposing a circulation pump and a filtration tank at appropriate positions on the piping coupled with a bath circulation adapter, injecting an appropriate quantity of chemical into a part of the piping system or the filtration tank through a constant quantity injection pump and eliminating installation of an aggregation electrode thereby eliminating the possibility of depositing electrolysis products. SOLUTION: A circulation pump and a filtration tank 3 are disposed at appropriate positions on the piping coupled with a bath circulation adapter and a filtering material 3a is incorporated in the filtration tank 3. Suction pipe 15 of a constant quantity pump 14 is inserted into a chemical container 13a encapsulating a chemical 13 and a delivery pipe 16 extends to the vicinity of a bathtub water inlet 3L of a filtration tank cover 3h. Bathtub water 5b contaminated through bathing is circulated through the filtration tank 3 by means of the circulation pump and purified. Since a chemical 13, e.g. a purification accelerating agent exhibiting purifying action, is injected at a constant flow rate to the vicinity of the bathtub water inlet 3L of the filtration tank 3 by means of the constant quantity pump 14, water 3f in the filtration tank is purified quickly when it passes through the filtering material 3a. |
