Heat exchanger

Abstract

A heat exchanger having tubes 21 for flowing a medium and tanks 3 each formed of an end plate 32 having tube insertion holes 5 for connection of the tubes and a tank plate 31 connected to the end plate, which are assembled and brazed in a heating furnace, wherein the tank plate 31 is formed of a plate provided with brazing materials R 1, R 2, and at least one of the tank plate 31 and the end plate 32 is provided with separator portions 311, 321 not provided with the brazing material for prevention of the brazing material from outflowing. The tank 3 has partition plates 7 for dividing the interior, the inner surface of at least one of the tank plate 31 and the end plate 32 is clad with the brazing material, and the partition plates 7 are formed of a bare material not clad with a brazing material. And, the end plate 32 has the brazing material clad on its one surface only, and the ends of the fins 4 and the surface of the end plate 32 not clad with the brazing material are opposed to each other at the time of brazing.

1 . A heat exchanger which has tubes for flowing a medium and a tank comprising an end plate having tube insertion holes for connecting the tubes and a tank plate connected to the end plate, and is formed by assembling the respective members and brazing the members for connection in a heating furnace; wherein: 
 the tank plate is formed of a plate provided with a brazing material, and    at least one of the tank plate and the end plate is provided with a separator portion not having a brazing material for prevention of the brazing material from outflowing.    
     
     
         2 . The heat exchanger according to  claim 1 , wherein the separator portion is disposed on a surface of the end plate which is in contact with the tank plate.  
     
     
         3 . The heat exchanger according to  claim 2 , wherein: 
 the tank plate has the brazing material disposed on its surface which becomes at least the inner surface of the tank, and    the end plate has the brazing material disposed on its surface which becomes the inner surface of the tank.    
     
     
         4 . The heat exchanger according to any one of  claims 1  to  3 , wherein the tank plate is provided with the separator portion on its surface which is in contact with the end plate.  
     
     
         5 . The heat exchanger according to any one of  claims 1  to  4 , wherein: 
 the tank is provided with a partition plate within it, and  
 the tank is formed by assembling the tank plate and the end plate while positioning by the partition plate.  
 
     
     
         6 . The heat exchanger according to any one of  claims 1  to  5 , wherein the heat exchanger uses tubes which are formed of a plate.  
     
     
         7 . The heat exchanger according to any one of  claims 1  to  6 , wherein the tubes have slits on the outer surfaces of the tubes which are in contact with tube insertion holes of the end plate.  
     
     
         8 . A heat exchanger having tubes for flowing a medium and tanks to which ends of the tubes are connected, wherein: 
 the tanks are formed by brazing an end plate which is provided with holes for connection of the ends of the tubes, a tank plate connected to the end plate, and a partition plate for dividing the interior, and    a brazing material is clad to the inner surface of at least one of the tank plate and the end plate, and the partition plate is formed of a bare material which is not clad with a brazing material.    
     
     
         9 . The heat exchanger according to  claim 8 , wherein the tubes have slits formed on the surfaces.  
     
     
         10 . The heat exchanger according to  claim 9 , wherein the tubes are formed of a plate material.  
     
     
         11 . A heat exchanger having a core which is formed by stacking tubes and fins, and tanks to which the ends of the tubes are connected, and performing heat exchange by a medium flowing through the tubes by heat conducted to the core, wherein: 
 the tanks have an end plate which is provided with holes for connection of the tubes and a tank plate to which the end plate is attached,    the heat exchanger is formed by assembling and brazing the tubes, the fins, the end plate and the tank plate in a furnace,    the end plate has a brazing material clad on its one surface only, and    the ends of the fins are opposed to a surface of the end plate not clad with the brazing material at the time of brazing.    
     
     
         12 . The heat exchanger according to  claim 11 , wherein the ends of the fins have a minimum distance of 2.0 mm or less from the surface of the end plate which is not clad with the brazing material.  
     
     
         13 . The heat exchanger according to  claim 11 , wherein the ends of the fins are in contact with the surface of the end plate which is not clad with the brazing material.