Corrugated fin for heat exchanger

Abstract

A method for producing a corrugated fin for a heat exchanger. Providing a gill structure having a plurality of longitudinally shaped gills arranged grid-like relative to one another is provided and the corrugated fin is produced in this manner on a fin sheet of corrugated design which can be flowed through by a fluid, in particular a gas, along a flow direction. The gills are arranged on the fin sheet in the form of a plurality of grid lines and grid columns so that the individual grid line (RZ) extend parallel to the flow direction and the individual grid columns perpendicularly to the flow direction and the individual gills additionally extend each along an extension direction and have a gill depth measured along the extension direction. The individual gills of a respective grid line are arranged following one another with a predetermined fin density perpendicularly to the flow direction so that the flow direction and the extension direction are arranged at an acute gill angle relative to one another.

1 . A corrugated fin for a heat exchanger, comprising
 a fin sheet of corrugated configuration which along a flow direction (DR) can be flowed through by a first fluid, in particular a gas, on which fin sheet a gill structure with a plurality of in each case longitudinally shaped gills are arranged in a grid-like manner relative to one another,   wherein the gill structure with the gills includes a plurality of grid lines (RZ) and a plurality of grid columns (RS) wherein each respective grid line of the plurality of grid lines (RZ) extend in parallel to the flow direction (DR) and each respective grid column of the plurality of grid columns (RS) extend perpendicularly to the flow direction (DR),   wherein the individual gills each extend along an extension direction (ER) and each have a gill depth (KT) measured along the extension direction (ER),   wherein the individual gills of a respective grid line (RZ) are arranged with a predetermined fin density (RD) following one another perpendicularly to the flow direction (DR),   wherein the flow direction (DR) and the extension direction (ER) are arranged at an acute gill angle (β) relative to one another,   wherein the individual gills are arranged relative to one another so that the following gill relationship is substantially satisfied:
   β=arctan((1/ RD )/(2* KT ))
 
   
     
     
         2 . The corrugated fin according to  claim 1 , wherein the plurality of individual gills are arranged relative to one another so that at least one first gill is arranged in a certain grid column and is arranged substantially in a virtual extension along the extension direction (ER) of a second gill that is arranged in a grid column next to but one relative to the defined grid column with the first gill. 
     
     
         3 . The corrugated fin according to  claim 1 , wherein
 the fin density (RD) is more than 110 Ri/dm.   
     
     
         4 . The corrugated fin according to  claim 1 , wherein
 the gill depth (KT) is at least 1.1 mm.   
     
     
         5 . The corrugated fin of  claim 1 , wherein
 a material thickness (D) of the fin sheet is between 0.05 mm and 0.1 mm.   
     
     
         6 . The corrugated fin according to  claim 1 , wherein
 a fin depth (RT) of the corrugated fin measured in the flow direction (DR) is between 15 mm and 80 mm.   
     
     
         7 . A heat exchanger in particular for a motor vehicle, comprising
 multiple first and second fluid paths alternately following one another along a stack direction (SR) which are fluidically separated from one another for being flowed through by a first and second fluid respectively,   wherein in at least one first fluid path, the corrugated fin of  claim 1  is arranged.   
     
     
         8 . The heat exchanger according to  claim 7 , wherein the at least one corrugated fin supports itself on two boundary elements located opposite one another in the stack direction (SR) and delimiting the first fluid path with the corrugated fin arranged therein. 
     
     
         9 . A method for producing a corrugated fin according to  claim 1 ,
 providing a fin sheet of corrugated design that is configured to be flowed through along a flow direction (DR) by a first fluid, in particular a gas,   forming a gill structure having a plurality of longitudinally shaped gills ( 4 ) arranged grid-like relative to one another,   wherein the gills are arranged upon the fin sheet with a plurality of grid lines (RZ) and a plurality of grid columns (RS) so that the individual grid lines (RZ) extend parallel to the flow direction (DR) and the individual grid columns (RS) are disposed perpendicularly to the flow direction (DR), wherein the individual gills each extend along an extension direction (ER) and have a gill depth (KT) measured along the extension direction (ER),   wherein the individual gills of a respective grid line (RZ) are arranged with a predetermined fin density (RD) following one another perpendicularly to the flow direction (DR), so that the flow direction (DR) and the extension direction (ER) are arranged at an acute gill angle (β) relative to one another,   wherein the individual gills are arranged relative to one another so that the following gill relationship is substantially satisfied:
   β=arctan((1/ RD )/(2* KT )),
 
   wherein KT is the gill depth and RD the gill density.   
     
     
         10 . The method according to  claim 9 , wherein
 an actually realised angle β* of at least one gill preferentially deviates by up to +/−3°, from the gill relationship β=arctan((1/RD)/(2*KT)).   
     
     
         11 . The method according to  claim 9 , wherein
 the individual gills of the plurality of gills are arranged and oriented relative to one another so that at least one first gill arranged in a certain grid line of the plurality of grid lines is substantially arranged in a virtual extension along the extension direction (ER) of a second gill which is arranged in a grid column adjacent to the certain grid column with the first gill.   
     
     
         12 . The method according to  claim 9 , wherein
 a fin density (RD) of more than 110 Ri/dm is provided.   
     
     
         13 . The method according to  claim 9 , wherein
 the gills are provided with a gill depth (KT) of at least 1.1 mm.   
     
     
         14 . The corrugated fin according to  claim 6 , wherein, the fin depth of the corrugated fin measured in the flow direction is between 15 mm and 55 mm. 
     
     
         15 . The heat exchanger of  claim 7 , wherein the corrugated fin is provided in multiple first fluid paths. 
     
     
         16 . The heat exchanger of  claim 7 , wherein the corrugated fin is provided in all first fluid paths. 
     
     
         17 . The method according to  claim 10 , wherein the actually realised angle β* of at least one gill deviates by up to +3°/−1° from the gill relationship β=arctan ((1/RD)/(2*KT)).