| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger capable of improving heat exchange efficiency by significantly enhancing heat transfer of eddy current by projection plates of fins.SOLUTION: A forward tilting projection plate 25A and a backward tilting projection plate 25B are disposed in a gas passage through which gas flows to an exhaust passage, the forward tilting plate 25A has a polygonal shape of quadrangle or more, having a base 26A and a pair of right and left sides 27A, 28A in contact with a peripheral face of the exhaust passage. The base 26A of the forward tilting projection plate 25A is disposed at an installation angle β1 oblique to an orthogonal direction CD to an exhaust flowing direction SD, an angle a to the base 26A, of one of the sides 27 positioned at an upstream side in the exhaust flowing direction SD of the forward tilting projection plate 25A, is larger than an angle b to the base 26A, of the other side 28A positioned at a downstream side of the exhaust flowing direction SD of the forward tilting projection plate 25A, and the base 26A of the forward tilting projection plate 25A and a base 26B of the backward tilting projection plate 25B are disposed in parallel with each other.SELECTED DRAWING: Figure 5 |
