Fin for a heat exchanger

Abstract

A fin for a heat exchanger, comprising a fin plate which is corrugated in a longitudinal direction and which is arranged between two structures and comprising a multiplicity of fin flanks formed by the corrugation, wherein the fin plate can be traversed in a depth direction by a flow of an in particular gaseous fluid for the purpose of transferring heat between the structures and the gaseous fluid, and wherein a multiplicity of gills with a gill depth and with a gill angle with respect to the depth direction is provided in the fin plate, said gills being arranged one behind the other on the fin flanks, running on a neutral line and extending substantially transversely with respect to the depth direction. The fin flanks have, at least in regions, a substantially undulating structure profile, resulting in an arrangement of the gills which runs on an undulating neutral line.

1 . A fin for a heat exchanger, comprising a fin plate corrugated in a longitudinal direction and arranged between two structures, and a plurality of fin flanks formed by the corrugation, a particularly gaseous fluid for the transmission of heat between the structures and the gaseous fluid being capable of flowing through the fin plate in a depth direction, and there being provided in the fin plate a plurality of gills which are arranged one behind the other on the fin flanks and run on a neutral line and which extend essentially transversely with respect to the depth direction, with a gill depth and a gill angle with respect to the depth direction, wherein the fin flanks have, at least in regions, an essentially wavy structural profile, thus giving rise to an arrangement of the gills which runs on the wavy neutral line. 
     
     
         2 . The fin as claimed in  claim 1 , wherein the neutral line has a continuous wavy profile with at least one wave portion such that the wave portion, commencing in parallel to the main flow direction, rises continuously in an arc to maximum deflection and then falls again correspondingly to the rise such that it runs out parallel to the main flow direction. 
     
     
         3 . The fin as claimed in  claim 2 , wherein a plurality of successive wave portions are provided for each fin flank. 
     
     
         4 . The fin as claimed in  claim 1 , wherein at least one first and one second gill group are provided for each wave portion, gill angles of the gill groups having different orientations. 
     
     
         5 . The fin as claimed in  claim 4 , the orientations being designed in such a way that an unaligned arrangement of the individual gills with respect to one another is obtained by means of the adjacent gills of two fin flanks. 
     
     
         6 . The fin as claimed in  claim 1 , wherein the gill angle amounts to between 20° and 60°, preferably to between 30° and 50°. 
     
     
         7 . The fin as claimed in  claim 1 , wherein the maximum deflection per fin flank preferably amounts to 7°. 
     
     
         8 . The fin as claimed in  claim 1 , wherein the wavy neutral line has in the highest wave region an offset of preferably ⅓ to the straight portions of adjacent fin flanks. 
     
     
         9 . A heat exchanger, comprising a fin as claimed in  claim 1 . 
     
     
         10 . The heat exchanger as claimed in  claim 9 , wherein the heat exchanger is designed as a heat exchanger of a motor vehicle, in particular has an electric heating body, liquid-operated heating body, evaporator of a vehicle air conditioning system, condenser of a vehicle air conditioning system, charge air cooler or coolant cooler.