PROBLEM TO BE SOLVED: To prevent excessively hot water from cascading when temperature of supplied hot water is set too high by mistake in an apparatus for cascading hot water which has a hot water cascading nozzle 41 for cascading, into a bath tab, hot water heated by a heat exchanger 51 for supplying hot water of a heat source machine 5.SOLUTION: The apparatus for cascading hot water includes: an electromagnetic valve 46 of cascading hot water which is arranged in the middle of a hot water cascading channel 42 for supplying hot water to the hot water cascading nozzle 41 a drain pipe 47 branched from the cascading hot water channel 42 in a part upstream from the electromagnetic valve 46 of cascading hot water an electromagnetic valve 48 of drainage arranged in the middle of the drain pipe 47 and a temperature sensor 45 for detecting temperature of hot water in the cascading hot water channel 42 in a part upstream from a branch of the drain pipe 47. When the temperature detected by the temperature sensor 45 reaches an upper limit temperature or higher, a processing for stopping cascading hot water is performed so that the electromagnetic valve 46 of cascading hot water is closed and that the electromagnetic valve 48 of drainage is opened. When the temperature detected by the temperature sensor 45 is lower than the upper limit temperature, the electromagnetic valve 48 of drainage is closed.COPYRIGHT: (C)2010,JPO&INPIT【課題】熱源機5の給湯用熱交換器51で加熱された温水を浴槽に落下させる打たせ湯ノズル41を備える打たせ湯装置において、給湯温度を誤って高温に設定したときの高温水の落下を防止する。【解決手段】打たせ湯ノズル41に温水を供給する打たせ湯水路42に介設した打たせ湯電磁弁46と、打たせ湯電磁弁46より上流側の打たせ湯水路42の部分から分岐させた排水路47と、排水路47に介設した排水電磁弁48と、排水路47の分岐個所より上流側の打たせ湯水路42の部分で温水の温度を検出する温度センサ45とを備える。温度センサ45の検出温度が所定の上限温度以上になったときに、打たせ湯電磁弁46を閉弁させると共に排水電磁弁48を開弁させる打たせ湯中止処理を実行し、温度センサ45の検出温度が上限温度を下回ったときに、排水電磁弁48を閉弁させる。【選択図】図3
