| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent breakage of fins by reducing stress acting on roots of the fins when activation stops.SOLUTION: A fin tube heat exchanger 100 comprises: a serrated fin tube 102 having a plurality of serrated fins 102b arranged in parallel on an outer circumferential surface; porous plates 106 in which pores 108 into which the serrated fin tube is inserted are formed, and that support the serrated fin tube. Sleeve members 110 interpose between a generally lower half of an outer circumferential surface 102c of the serrated fin tube and the pores. Each sleeve member includes: spacers 112 provided on axial both ends of the serrated fin tube, respectively, and interposing between the generally lower half of the outer circumferential surface and the pores; holding portions 116 formed on ends of each spacer for holding the spacer between a connecting member 114 and the serrated fin tube; and an exposure space 118 exposing the outer circumferential surface of the serrated fin tube. The sleeve members are formed integrally using a material closer in coefficient of thermal expansion to a heat transfer tube than the porous plate.</p> |
