High-efficiency heat sink

Abstract

A high-efficiency heat sink includes a base and a plurality of heat sink fins A folded portion of each heat sink fin is formed by folding after being pressed and thinned, so that the thickness of the folded portion is less than the thickness of an insertion end of each heat sink fin. The thickness of the portion where the heat sink fin is inserted into a groove of the base is less than twice the thickness of the heat sink fin. It is beneficial to reduce the distance between two adjacent heat sink fins on the base, so that the heat sink fins can be arranged more densely, thereby improving the heat dissipation effect of the entire heat sink effectively.

What is claimed is: 
     
         1 . A high-efficiency heat sink, comprising a base and a plurality of heat sink fins, a surface of the base being formed with a plurality of spaced grooves for attachment of the heat sink fins, each of the heat sink fins having an insertion end, the insertion end being reversely folded and extending to form a folded portion, the folded portion being formed by folding after being pressed and thinned, the folded portion having a thickness less than that of the insertion end, the folded portion and the insertion end being fitted and embedded into a corresponding one of the grooves of the base; wherein after the folded portion of each heat sink fin is inserted into the corresponding groove of the base, a press head is aligned with the folded portion for pressing, the press head covers the folded portion, after pressing, the folded portion is pressed down in the corresponding groove to be deformed, expanded and coupled into the corresponding groove so that the heat sink fins are combined with the base. 
     
     
         2 . The high-efficiency heat sink as claimed in  claim 1 , wherein the press head has a press bevel that partially covers the folded portion and a side wall of the corresponding groove simultaneously, and the press bevel presses the side wall of the corresponding groove to cause a deformation so that the deformed side wall of the corresponding groove is pressed against the folded portion. 
     
     
         3 . The high-efficiency heat sink as claimed in  claim 1 , wherein before folding, a first side of the folded portion is recessed relative to a first side of the insertion end, and a second side of the folded portion is flush with a second side of the insertion end; after folding, the second side of the folded portion is overlapped with the second side of the insertion end. 
     
     
         4 . The high-efficiency heat sink as claimed in  claim 1 , wherein each of the heat sink fins has a main body, and the main body is provided with an accommodating groove penetrating through two ends of the main body for filling a cooling liquid. 
     
     
         5 . The high-efficiency heat sink as claimed in  claim 4 , wherein the accommodating groove is plural and arranged in parallel and spaced apart from each other. 
     
     
         6 . The high-efficiency heat sink as claimed in  claim 1 , wherein a bottom end surface of the base is formed with at least one engaging groove for attachment of a heat pipe, and the heat pipe has a flat bottom surface that is exposed to the bottom surface of the base. 
     
     
         7 . The high-efficiency heat sink as claimed in  claim 6 , wherein the heat pipe is bent to pass through the plurality of heat sink fins to form a tight combination. 
     
     
         8 . The high-efficiency heat sink as claimed in  claim 1 , wherein the base has a circular shape, and a peripheral wall surface of the base is formed with the plurality of grooves spaced axially for attachment of the plurality of heat sink fins.