| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a heat exchanger capable of being preferably thinned as a whole.SOLUTION: In a heat exchanger HE1 configured by connecting a most downstream heat transfer tube in which hot water flows last in a first heat transfer tube arrangement portion R1, to one of heat transfer tubes of a second heat transfer tube arrangement portion R2 through a third piping member 12c, so that the hot water flowing in the first heat transfer tube arrangement portion R1, flows to the second heat transfer tube arrangement portion R2 through the third piping member 12c, the heat transfer tube Tb" connected to the most downstream heat transfer tube Tb' through the third piping member 12c, of the second heat transfer tube arrangement portion R2, is the heat transfer tube different from that closest to the most downstream heat transfer tube Tb'.</p> |
