| 摘要 |
PURPOSE:To secure a gap for a plurality of spacers and to prevent the thermal deformation of the spacers by a method wherein the upper and the lower ends of the vertical spacers are connected to one another, respectively, and the spacers are arranged vertically within a combustion gas passage leaving the gap from the wall of the passage in such a manner that the spacers are allowed to expand thermally in the vertical direction. CONSTITUTION:In the heat exchanger in which a combustion gas passage is provided vertically and a coil-like heat medium passage 1 is arranged within the combustion gas passage leaving the gap 10 from the wall 2 of the latter, the spacers 15 each having a length equal to the vertical length of the gap 10 and whose upper and lower ends are connected to one another, respectively, are used to secure the gap 10. In this case, the spacers 15 are allowed to expand thermally in the vertical direction. Thus it is possible to secure the gap 10 and to obtain a spacer fixing structure with which no deformation of the spacers takes place. |
