| 摘要 |
<P>PROBLEM TO BE SOLVED: To attain secure bubble water flow cleaning of a bath circulation circuit at low cost. <P>SOLUTION: The device includes: a bath circulation pump 22 provided in the middle of a bath circulation circuit 19 and capable of being normally and reversely driven; a hot water supply pipe 26 connected to a bath outgoing pipe 21 to supply hot water to a bathtub 2; a hot water supply on-off valve 27 for opening and closing the hot water supply pipe 26; a hopper drain valve 30 branched from the downstream side of the hot water supply pipe 27 and connected thereto, the valve being opened to the atmosphere when the pressure on the upstream side of the hot water supply on-off valve 27 becomes lower than the pressure on the downstream side of the hot water supply on-off valve 27; and a decompression means 14 provided on the upstream side of the hot water supply on-off valve 27 and capable of reducing a feed-water pressure applied to the hot water supply pipe 26. The hot water supply on-off valve 27 is closed after the feed-water pressure applied to the hot water supply pipe 26 is reduced by the decompression means 14 with the hot water supply on-off valve 27 being opened, and the bath circulation pump 22 is reversely driven, whereby air is sucked into the bath outgoing pipe 21 through the hopper drain valve 30. <P>COPYRIGHT: (C)2013,JPO&INPIT |
