Method for producing a heat exchange and heat exchanger

Abstract

A method for producing a heat exchanger may include: a) applying an adhesive layer to an outer side of heat exchanger tubes by laminating at least one of an adhesive sheet and an adhesive film; b) expanding the tubes on a longitudinal end side in a connecting region via an expanding mandrel; c) arranging the tubes parallel to one another such that the tubes lie flat against one another via the connecting region; and d) heating the adhesive layer at least in the connecting region of the tubes to adhesively bond the tubes to one another via the connecting region.

1 . A method for producing a heat exchanger comprising:
 a) applying an adhesive layer to an outer side of heat exchanger tubes by laminating at least one of an adhesive sheet and an adhesive film;   b) expanding the tubes on a longitudinal end side in a connecting region via an expanding mandrel;   c) arranging the tubes parallel to one another such that the tubes lie flat against one another via the connecting regions; and   d) heating the adhesive layer at least in the connecting region of the tubes to adhesively bond the tubes to one another via the connecting regions.   
     
     
         2 . The method as claimed in  claim 1 , wherein the adhesive layer is heated in step d) to a temperature of between 80° C. and 400° C. 
     
     
         3 . The method as claimed in  claim 1 , wherein the adhesive layer is heated in step d) for a duration of less than 10 minutes. 
     
     
         4 . The method as claimed in  claim 1 , wherein heating the adhesive layer includes pressing the connecting region of the tubes against one another with a contact pressure of between 0.1 N//mm 2  and 0.7 N/mm 2  to form an adhesively bonded connection. 
     
     
         5 . The method as claimed in  claim 4 , wherein heating the adhesive layer includes heating the expanding mandrel for heating the adhesive layer. 
     
     
         6 . The method as claimed in  claim 1 , wherein the adhesive layer is heated in a furnace. 
     
     
         7 . The method as claimed in  claim 1 , further comprising cooling the adhesive layer after step d). 
     
     
         8 . The method as claimed in  claim 1 , wherein applying the adhesive layer includes forming a layer thickness of between 5 μm and 500 μm. 
     
     
         9 . The method as claimed in  claim 1 , further comprising inserting a fin structure between two adjacent tubes and adhesively bonding the fin structure to the two adjacent tubes via the adhesive layer. 
     
     
         10 . The method as claimed in  claim 1 , further comprising arranging at least part of a collector in a region of the connecting region of the tubes, the at least part of the collector including the connecting region of the tubes each being arranged on the same side, and adhesively bonding an edge of the at least part of the collector the connecting region of each tube. 
     
     
         11 . A heat exchanger comprising:
 a plurality of tubes having an outwardly expanded longitudinal end structured with a flat connecting region on an outer side thereof;   an adhesive layer disposed on the connecting region of the longitudinal end of the plurality of tubes, the adhesive layer including at least one of a laminated adhesive sheet and a laminated adhesive film; and   wherein the plurality of tubes are arranged parallel to one another such that the connecting region of each of the plurality of tubes lie flat against one another, and wherein the plurality of tubes are adhesively bonded to one another at the connecting region view the adhesive layer.   
     
     
         12 . The heat exchanger as claimed in  claim 11 , wherein the adhesive layer has a layer thickness of between 5 μm and 500 μm. 
     
     
         13 . The heat exchanger as claimed in  claim 11 , further comprising a fin structure arranged between two adjacent tubes of the plurality of tubes. 
     
     
         14 . The heat exchanger as claimed in  claim 13 , wherein the fin structure is adhesively bonded to the two adjacent tubes of the plurality of tubes via the adhesive layer. 
     
     
         15 . The heat exchanger as claimed in  claim 11 , further comprising a collector disposed at the longitudinal end of the plurality of tubes, wherein the plurality of tubes open into the collector. 
     
     
         16 . The heat exchanger as claimed in  claim 15 , wherein the collector is a water box. 
     
     
         17 . The method as claimed in  claim 2 , wherein heating the adhesive layer includes pressing the connecting region of the tubes against one another with a predefined contact pressure. 
     
     
         18 . The method as claimed in  claim 17 , wherein the predefined contact pressure ranges from 0.1 N/mm 2  to 0.7 N/mm 2 . 
     
     
         19 . A method for producing a heat exchanger, comprising:
 a) applying an adhesive layer to an outer side of heat exchanger tubes by laminating at least one of an adhesive sheet and an adhesive film;   b) expanding the tubes on a longitudinal end side in a connecting region via an expanding mandrel;   c) arranging the tubes parallel to one another such that the tubes lie flat against one another via the connecting region; and   d) adhesively bonding the tubes to one another via the connection region by heating the adhesive layer at least in the connecting region of the tubes to a predefined temperature and pressing the tubes against one another at the connecting region with a predefined contact pressure.   
     
     
         20 . The method as claimed in  claim 19 , wherein at least one of:
 the predefined temperature is between 80° C. and 400° C.; and   the predefined contact pressure is between 0.1 N/mm 2  and 0.7 N/mm 2 .