| 摘要 |
<p>PURPOSE:To obstruct the generation of an offensive smell by suppressing anaerobic bacteria being the case of generation of the offensive smell by taking oxygen containing gas for breeding aerobic bacteria into hot water between a bathtub of an intake pipe and a circulating pump. CONSTITUTION:A calorifier 10B into which a water quality improving means for hot water W housed in a bathtub 10A is integrated is formed against an area of an intake pipe 16 positioned between the bathtub 10A and a circulating pump 17, and provided with a gas intaking port 21 to be communicated so as to receive supply of oxygen containing gas from a gas supply source by negative pressure attended with the action of the circulating pump 17. Accordingly, the hot water W passes through a filter 12 by a gravity action, while holding sufficient oxygen containing gas, and thereafter, can supply oxygen of a sufficient quantity to aerobic bacteria existing in natural stone groups 13A,-13C, and its breeding can be quickened sufficiently. In such a manner, aerobic bacteria can sufficiently eliminate anaerobic bacteria, and the generation of an offensive smell can be suppressed.</p> |
