Heat sink

Abstract

A heat sink includes a thermal conductive base panel that has a plurality of heat dissipation columns of any of a variety of configurations perpendicularly upwardly extending from the top wall, and radiation fins mounted on the heat dissipation columns at different elevations, each radiation fin having a plurality of mounting through holes respectively press-fitted onto the heat dissipation columns. The base panel may be provided with a fan and/or heat pipes to enhance heat dissipation efficiency.

1 . A heat sink comprising:
 a thermal conductive base panel, said base panel having a plurality of heat dissipation columns perpendicularly upwardly extending from a top wall thereof and respectively spaced from one another at a distance; and   a plurality of radiation fins mounted on said heat dissipation columns at different elevations, said radiation fins each having a plurality of mounting through holes respectively press-fitted onto said heat dissipation columns.   
   
   
       2 . The heat sink as claimed in  claim 1 , wherein said heat dissipation columns are arranged in an array. 
   
   
       3 . The heat sink as claimed in  claim 1 , wherein said mounting through holes of said radiation fins have a cross-shaped cross section, and said heat dissipation columns have a cross-shaped cross section respectively tightly fitted into said mounting through holes of said radiation fins. 
   
   
       4 . The heat sink as claimed in  claim 1 , wherein said mounting through holes of said radiation fins have a rectangular cross section, and said heat dissipation columns have a rectangular cross section respectively tightly fitted into said mounting through holes of said radiation fins. 
   
   
       5 . The heat sink as claimed in  claim 1 , wherein said mounting through holes of said radiation fins have a circular cross section, and said heat dissipation columns have a circular cross section respectively tightly fitted into said mounting through holes of said radiation fins. 
   
   
       6 . The heat sink as claimed in  claim 1 , wherein said mounting through holes of said radiation fins have a hexagonal cross section, and said heat dissipation columns have a hexagonal cross section respectively tightly fitted into said mounting through holes of said radiation fins. 
   
   
       7 . The heat sink as claimed in  claim 1 , wherein said mounting through holes of said radiation fins have a triangular cross section, and said heat dissipation columns have a triangular cross section respectively tightly fitted into said mounting through holes of said radiation fins. 
   
   
       8 . The heat sink as claimed in  claim 1 , wherein said mounting through holes of said radiation fins have an elongated rectangular cross section, and said heat dissipation columns have an elongated rectangular cross section respectively tightly fitted into said mounting through holes of said radiation fins. 
   
   
       9 . The heat sink as claimed in  claim 1 , wherein said heat dissipation columns each have a chamfered foot fixedly connected to the top wall of said base panel. 
   
   
       10 . The heat sink as claimed in  claim 9 , wherein the chamfered foot of each said heat dissipation column is chamfered in taperedly chamfered form, convexly chamfered form, or concavely chamfered form. 
   
   
       11 . The heat sink as claimed in  claim 1 , wherein said radiation fins each have a plurality of flanges protruding from a top surface thereof and respectively extending around said mounting through holes. 
   
   
       12 . The heat sink as claimed in  claim 1 , wherein said base panel is extruded from copper or aluminum. 
   
   
       13 . The heat sink as claimed in  claim 1 , wherein said base panel has a metal block embedded in a bottom wall thereof in flush with a bottom surface thereof, said metal block having a heat transfer coefficient higher than the metal material of said base panel. 
   
   
       14 . The heat sink as claimed in  claim 1 , wherein said heat dissipation columns have different heights. 
   
   
       15 . The heat sink as claimed in  claim 1 , wherein said heat dissipation columns are stepped columns. 
   
   
       16 . The heat sink as claimed in  claim 1 , wherein said mounting through holes of said radiation fins are stepped through holes, and the stepped mounting through holes of one said radiation fin are respectively fitted into the stepped mounting through holes of another said radiation fin when said radiation fins are mounted on said heat dissipation columns. 
   
   
       17 . The heat sink as claimed in  claim 1 , wherein said heat dissipation columns each have a chamfered top end. 
   
   
       18 . The heat sink as claimed in  claim 17 , wherein the chamfered top end of each said heat dissipation column is chamfered in taperedly chamfered form, convexly chamfered form, or concavely chamfered form. 
   
   
       19 . The heat sink as claimed in  claim 1 , wherein said base panel has a fan mounting region disposed at one side beyond said heat dissipation columns and said radiation fins for the mounting of a fan. 
   
   
       20 . The heat sink as claimed in  claim 1 , wherein said base panel has a fan mounting region disposed at the center thereof and surrounded by said heat dissipation columns and said radiation fins for the mounting of a fan. 
   
   
       21 . The heat sink as claimed in  claim 1 , wherein said base panel has at least one pipe groove on a flat bottom wall thereof, and at least one heat pipe respectively mounted in said at least one pipe groove, said at least one heat pipe each having a flat bottom wall disposed in flush with the bottom wall of said base panel. 
   
   
       22 . The heat sink as claimed in  claim 21 , wherein said at least one heat pipe is respectively press-fitted into said at least one pipe groove of said base panel.