Heat exchanger and fabrication method thereof

Abstract

A heat exchanger having an aluminum main body is provided. The aluminum main body has heat exchange medium passages that allow the heat exchange medium to circulate, and fins for heat exchange extending outwards from the surface thereof. A method of fabricating the heat exchanger is also provided. The aluminum main body with heat exchange medium passages is formed by stretching or extrusion. The fins are shaped on the external surface of the aluminum main body through skiving. Since the main body and the fins are integrally formed, no extra combined thermal resistance exists between the fins and the main body, and thus the heat exchanger of the present invention has high heat exchange efficiency. Moreover, the method of fabricating the heat exchanger of the present invention has simple processes, and can ensure consistent product quality, and meanwhile does not use expensive copper tubes, thus reducing the cost effectively.

1 . A heat exchanger, comprising:
 an aluminum main body having heat exchange medium passages that allow a heat exchange medium to circulate; and   fins for heat exchange which extending outward from a surface of said aluminum main body.   
     
     
         2 . The heat exchanger of  claim 1 , wherein the fins are of a sheet structure and formed through skiving technics. 
     
     
         3 . The heat exchanger of  claim 2 , wherein a thickness, height, and spacing of the fins are determined by a quantity of heat exchange and a force of wind resistance. 
     
     
         4 . The heat exchanger of  claim 2 , wherein the heat exchanger is bent into a shape of “S”, “C”, or helix. 
     
     
         5 . The heat exchanger of  claim 4 , wherein a transverse cross-section of said aluminum main body is rectangular or trapezoidal shaped, and said fins are disposed on two opposite sides of said aluminum main body. 
     
     
         6 . The heat exchanger of  claim 5 , wherein said heat exchanger further comprises a supporting plate on which said heat exchanger is mounted and fixed, and tube joints disposing at both ends of said main body for connecting the heat exchange medium passages inside said main body and an external heat exchange medium piping. 
     
     
         7 . The heat exchanger of  claim 6 , wherein the transverse cross-section of said heat exchange medium passages is in a shape of round, triangle, quadrangle, or polygon. 
     
     
         8 . The heat exchanger of  claim 7 , wherein plurality of heat exchange medium passages disposing in said main body. 
     
     
         9 . A method of fabricating the heat exchanger, comprising the following step:
 A1. fabricating a aluminum main body: forming the aluminum main body having heat exchange medium passages that allow a heat exchange medium to circulate through stretching or extrusion;   B1. fabricating the heat sink: shaping fins through skiving technics on an external surface of said aluminum main body formed in Step A1.   
     
     
         10 . The method of  claim 9 , further comprising the following steps after Step B1:
 C1. pushing said fins: adjusting said fins to form a certain angle with respect to a surface of said main body;   D1. bending said heat exchanger with fins relieved thereon into a desired shape.