| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a compact arrangement that recovers latent heat to enhance heat efficiency and achieve energy savings. <P>SOLUTION: A latent heat exchanger of a water-heating heat exchanger heated by a burner to exchange heat with hot water comprises a plurality of bellows pipes 27 and heat-transfer fin parts 25 mounted on the outsides of the plurality of bellows pipes. The heat-transfer fins are folded back and semicircular protrusions and cylindrical burring or the like are provided, whereby a high-efficiency heat exchange apparatus larger than an arrangement composed only of the bellows pipes 27 and the heat-transfer fins can be provided. <P>COPYRIGHT: (C)2007,JPO&INPIT |
