| 摘要 |
PURPOSE:To obtain the titled apparatus less in installation expense, establishment space and operation cost by providing a heating layer and a filtration-filter layer in the order thereof from the under part to the inside of a main body which is joined to a bath in a circulation type and kept in a closed state. CONSTITUTION:Bath water incorporated in a bath 16 is forcedly passed by a circulation pump 18 through a heating layer 12 which is provided to the under part of a main body 10 and consists of a combustion heating device such as a temp. rising device or a boiler and heated, and thereafter passed through a filtration-filter layer 14 set in the upper part of the heating layer 12 to filter a suspended matter such as refuse, dirt and body hair. Then purified bath water is returned to the bath 16. As a result, an apparatus less in installation expense, establishment space and operation cost can be obtained.
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