Heat Exchanger

Abstract

The invention provides a heat exchanger having a fin with an optimum thickness, and thus being capable of providing a superior cooling effect while having an excellent workability. A heat exchanger is designed to be mounted on a construction machine used on a construction site and is configured to cool heated cooling water. The heat exchanger includes a tube that allows the cooling water to flow therein, and a fin that is joined to the tube and has an imperforate and planar heat radiation surface. The thickness of the fin is greater than 0.2 mm but is equal to or less than 0.4 mm. Further, aluminum is selected as the material for the tube and the fin. The tube and the fin are joined to each other with an aluminum brazing rod.

1 . A heat exchanger that cools a heated cooling medium, the heat exchanger comprising:
 a tube that allows the cooling medium to flow therein; and   a fin that is joined to the tube and has a heat radiation surface that is entirely imperforate and planar, wherein   a thickness of the fin is greater than 0.2 mm but is equal to or less than 0.4 mm.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein aluminum is selected as a material for the tube and the fin. 
     
     
         3 . The heat exchanger according to  claim 1 , wherein
 copper is selected as a material for the tube and the fin; and   a thickness of the fin is greater than 0.2 mm but is equal to or less than 0.3 mm.   
     
     
         4 . The heat exchanger according to  claim 1 , the heat exchanger being configured to be mounted on a construction machine. 
     
     
         5 . The heat exchanger according to  claim 2 , the heat exchanger being configured to be mounted on a construction machine. 
     
     
         6 . The heat exchanger according to  claim 3 , the heat exchanger being configured to be mounted on a construction machine.