| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust heat recovery device for a hot water supply system capable of efficiently exchanging heat between used hot water and water supplied from a water supply source, and physically removing scale attached in accompany with circulation of the used hot water.SOLUTION: The exhaust heat recovery device includes a plurality of heat transfer cassettes disposed at intervals, and a plurality of connectors connecting the heat transfer cassettes, the heat transfer casette includes a water passage formed inside, a water supply hole for supplying water to the water passage, and a drain hole for discharging the water from the water passage, the connector includes a pair of connecting members respectively mounted on the adjacent heat transfer cassettes, the pair of connecting members respectively have a first communication hole communicated with the water supply hole, and a second communication hole communicated with the drain hole, and are relatively rotatably connected with each other, and in a state that the plurality of heat transfer cassettes are aligned, the water supply holes and the first communication holes are communicated with each other to form inflow passages, and the drain holes and the second communication holes are communicated with each other to form outflow passages. |
