PROBLEM TO BE SOLVED: To prevent the air lock of a pump by performing piping so as not to generate an air reservoir in the middle of suction piping communicating and connecting the pump and a suction port part by simple constitution.SOLUTION: On the outer surface side of one wall surface part of the bathtub 2, the pump 6, a jetting port part 3 and the suction port part 1 are disposed at intervals in a lateral direction. In the middle of the suction piping 9 communicating and connecting the pump 6 and the suction port part 1, an ejector part 5 for mixing air is provided. A communicating and connecting part with the suction piping 9 in the pump 6 is shifted upwards at least for a dimension exceeding the diameter of the suction piping 9 than the jetting port part 3. The position of the suction port part 1 is turned to the position at the same height as the height of the jetting port part 3 or the position lower than the jetting port part 3. In the state of positioning the suction piping 9 on the jetting port part 3, the suction piping 9 is connected to the jetting port part 3 by a positioning tool 10. The suction piping 9 is inclined upwards more on the side of the pump 6.COPYRIGHT: (C)2008,JPO&INPIT【課題】 簡単な構成でポンプと吸込み口部とを連通接続する吸込み配管の途中にエア溜まりが生じないように配管でき、ポンプのエアロックの発生を防止する。【解決手段】 浴槽2の一壁面部の外面側にポンプ6、噴射口部3、吸込み口部1を横方向に間隔を隔てて配置する。ポンプ6と吸込み口部1とを連通接続する吸込み配管9の途中に空気混入用エゼクタ部5を設ける。ポンプ6における吸込み配管9との連通接続部を、噴射口部3よりも少なくとも吸込み配管9の直径を越えた寸法上方にずらせて位置させる。吸込み口部1の位置を噴射口部3の高さと同じ高さ又は噴射口部3より低い位置とする。吸込み配管9を噴射口部3の上に位置させた状態で位置決め治具10で吸込み配管9を噴射口部3に接続する。吸込み配管9をポンプ6側程上り傾斜させる。【選択図】図1
