PROBLEM TO BE SOLVED: To perform reheating and fine bubble supply using a common pump while simplifying a structure around a bathtub.SOLUTION: The reheating device comprises a connection unit 30 provided in the bathtub, a reheating circulation circuit having upstream and downstream ends connected to the connection unit 30, and the pump and a heat supply part provided on the midway of the reheating circulation circuit. It has an outside air supply means connected to the reheating circulation circuit on a pump suction side for supplying outside air, a branch circuit branching from the reheating circulation circuit on a pump discharge side, and a selecting means for selecting either the reheating circulation circuit or the branch circuit on the downstream side beyond a branch point, as a hot water passage. The connection unit 30 has a suction passage 51 connecting the upstream end of the reheating circulation circuit to the inside of the bathtub, a first discharge passage 52 connecting the downstream end of the reheating circulation circuit to the inside of the bathtub, and a second discharge passage 53 connecting the downstream end of the branch circuit to the inside of the bathtub. The second discharge passage includes distribution resistance parts 35h, 35i.COPYRIGHT: (C)2007,JPO&INPIT【課題】 追焚,微細気泡供給を共通のポンプを用いて行ない、しかも浴槽周り構造を簡略化する。【解決手段】 追焚装置は、浴槽に設けられた接続ユニット30と、接続ユニット30に上流端および下流端が接続された追焚循環回路と、この追焚循環回路の中途部に設けられたポンプおよび熱供給部と、を備えている。ポンプの吸い込み側において追焚循環回路に接続され外気を供給する外気供給手段と、ポンプの吐出側において追焚循環回路から分岐した分岐回路と、この分岐点より下流側の追焚循環回路と分岐回路のいずれかを、湯の通路として選択する切替手段とを備えている。接続ユニット30は、追焚循環回路の上流端と浴槽内とを連ねる吸込通路51と、追焚循環回路の下流端と浴槽内とを連ねる第1吐出通路52と、分岐回路の下流端と浴槽内とを連ねる第2吐出通路53とを有している。第2吐出通路は流通抵抗部35h,35iを含む。【選択図】 図3
