| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust heat recovery system capable of reducing manufacturing cost. <P>SOLUTION: The exhaust heat recovery system 1 is provided with a heat recovery unit 6 having a heat exchange chamber 5 arranged with a heat transfer pipe 4 provided with a gas inlet 2 connected to an exhaust gas lead-in pipe 7 and a gas outlet 3 connected to an exhaust gas lead-out pipe 8 and supplied with hot water for heat recovery, a bypass pipe 9 provided between the exhaust gas lead-in pipe 7 and the exhaust gas lead-out pipe 8 to bypass the heat recovery unit 6, and a change-over damper 10 provided in an exhaust gas lead-in pipe 7 side to change over exhaust gas led in by the exhaust gas lead-in pipe 7 to either one of a heat exchange chamber 5 side or a bypass pipe 9 side. A cooling air supply pipe 13 for supplying cooling air into the heat exchange chamber 5 is connected to the exhaust heat recovery system 1, and it is composed so that when heat recovery is not necessary, heat leaking into the heat exchange chamber is cooled by supplying the cooling air into the heat exchange chamber by the cooling air supply pipe and discharging it out to the exhaust gas lead-out pipe from the gas outlet. <P>COPYRIGHT: (C)2004,JPO |
