PROBLEM TO BE SOLVED: To provide a bath water heater configured to properly supply micro air bubbles to a bathtub.SOLUTION: The bath water heater includes: a circulation pipe (reheating circulation pipe 15) which circulates and returns bath water 6 derived from a bathtub 5 to the bathtub 5 a circulation pump 14 which circulates the bath water 6 in the circulation pipe a first micro air bubble generation device 16 which is provided in the middle of the circulation pipe to generate micro air bubbles in the bath water and a second micro air bubble generation device 17 which is provided in the circulation pipe downstream of the first micro air bubble generation device 16 and generates micro air bubbles in the bath water. The micro air bubbles are supplied to the bathtub 5 by generating the micro air bubbles by the first micro air bubble generation device 16 and second micro air bubble generation device 17, while the bath water 6 is circulated in the circulation pipe.COPYRIGHT: (C)2013,JPO&INPIT【課題】微小気泡を浴槽まで確実に供給することのできる風呂給湯装置を提供すること。【解決手段】本発明の風呂給湯装置は、浴槽5から導出した浴水6を循環させて浴槽5に戻す循環配管(追い焚き用循環配管15)と、循環配管に浴水6を循環させる循環ポンプ14と、循環配管の途中に設けられ、浴水中に微小気泡を生成可能な第1の微小気泡発生装置16と、循環配管の第1の微小気泡発生装置16より下流側に設けられ、浴水中に微小気泡を生成可能な第2の微小気泡発生装置17と、を備え、循環配管に浴水6を循環させながら第1の微小気泡発生装置16および第2の微小気泡発生装置17で微小気泡を生成することにより浴槽5に微小気泡を供給する。【選択図】図1
