Heat pipe-attached heat sink

Abstract

A heat pipe-attached heat sink includes a bottom block having an opening and locating grooves arranged on the flat bottom wall thereof, a radiation fin module consisting of first radiation fins and second radiation fins, each first radiation fin having extension abutment strip that has a flat bottom abutment edge and locating grooves located on the flat bottom abutment edge and dividing the flat bottom abutment edge into a plurality of spacer ribs, the extension abutment strips of the first radiation being tightly plugged into the opening of the bottom block, and heat pipes respectively press-fitted into the locating grooves of the bottom block and the locating grooves of the first radiation fins of the radiation fin module, each heat pipe having a planar peripheral side exposed outside the radiation fin module and the bottom block and kept in flush with the flat bottom abutment edge of the extension abutment strips for direct contact with an external heat source.

1 . A heat pipe-attached heat sink, comprising:
 a bottom block comprising an opening cut through opposing flat top and bottom walls thereof and a plurality of locating grooves arranged on the flat bottom wall and extended to said opening;   a radiation fin module fastened to said bottom block, said radiation fin module comprising a plurality of first radiation fins and second radiation fins arranged in a stack, each said first radiation fin comprising an extension abutment strip, said extension abutment strip comprising a flat bottom abutment edge and a plurality of locating grooves located on said flat bottom abutment edge and dividing said flat bottom abutment edge into a plurality of spacer ribs, the extension abutment strips of said first radiation fins forming a protruding block and being tightly plugged into the opening of said bottom block; and   a plurality of heat pipes respectively press-fitted into the locating grooves of said bottom block and the locating grooves of the extension abutment strips of said first radiation fins of said radiation fin module, each said heat pipe comprising a planar peripheral side exposed outside said radiation fin module and said bottom block for direct contact with an external heat source.   
     
     
         2 . The heat pipe-attached heat sink as claimed in  claim 1 , wherein the flat bottom abutment edge of the extension abutment strip of each said first radiation fin, the flat bottom wall of said bottom block and the planar peripheral side of each said heat pipe form a coplane. 
     
     
         3 . The heat pipe-attached heat sink as claimed in  claim 1 , wherein the extension abutment strip of each said first radiation fin further comprises at least one locating rib formed in each locating groove at the flat bottom abutment edge thereof for engagement with the periphery of said heat pipes. 
     
     
         4 . The heat pipe-attached heat sink as claimed in  claim 1 , wherein said bottom block further comprises at least one locating rib formed in each locating groove at the flat bottom wall thereof for engagement with the periphery of said heat pipes. 
     
     
         5 . The heat pipe-attached heat sink as claimed in  claim 1 , wherein said bottom block further comprises a plurality of spacer ribs formed of the flat bottom wall thereof and respectively disposed between each two adjacent ones of the locating grooves of said bottom block corresponding to the spacer ribs of the extension abutment strips of said first radiation fins of said radiation fin module. 
     
     
         6 . The heat pipe-attached heat sink as claimed in  claim 1 , wherein the spacer ribs of said first radiation fins have a height smaller than the depth of the locating grooves of said first radiation fins. 
     
     
         7 . The heat pipe-attached heat sink as claimed in  claim 5 , wherein the spacer ribs of said bottom block have a height smaller than the depth of the locating grooves of said bottom block. 
     
     
         8 . The heat pipe-attached heat sink as claimed in  claim 1 , wherein each said heat pipe comprises a flat protruding peripheral portion protruding over the flat bottom wall of said bottom block; the flat bottom abutment edges of the extension abutment strips of said first radiation fins of said radiation fin module protrude over the flat bottom wall of said bottom block and are kept in flush with the flat protruding peripheral portions of said heat pipes. 
     
     
         9 . The heat pipe-attached heat sink as claimed in  claim 1 , wherein said bottom block further comprises a plurality of mounting holes for mounting. 
     
     
         10 . The heat pipe-attached heat sink as claimed in  claim 1 , wherein said bottom block further comprises a plurality of retaining holes for receiving said first radiation fins and second radiation fins of said radiation fin module tightly. 
     
     
         11 . The heat pipe-attached heat sink as claimed in  claim 1 , further comprising a second radiation fin module, wherein said heat pipes each have one end thereof respectively extended out of said bottom block and fastened to said second radiation fin module. 
     
     
         12 . The heat pipe-attached heat sink as claimed in  claim 1 , wherein said first radiation fins and second radiation fins of said radiation fin module each comprise a plurality of through holes; said heat pipes are U-shaped pipes each having one end thereof fastened to the locating grooves of said first radiation fins and the locating grooves of said bottom block and an opposite end thereof respectively and tightly press-fitted into the through holes of said first radiation fins and second radiation fins of said radiation fin module. 
     
     
         13 . The heat pipe-attached heat sink as claimed in  claim 1 , wherein said heat pipes each have a heat-receiving end press-fitted into the locating grooves of said first radiation fins and the locating grooves of said bottom block and a flat protruding peripheral portion located on said heat-receiving end and protruding over the flat bottom wall of said bottom block at a predetermined distance. 
     
     
         14 . The heat pipe-attached heat sink as claimed in  claim 1 , wherein said bottom block comprises a flat protrusion protruded from the flat bottom wall thereof and abutted to said opening; the locating grooves of said bottom block are located on said flat protrusion. 
     
     
         15 . The heat pipe-attached heat sink as claimed in  claim 14 , wherein the locating grooves of said first radiation fins of said radiation fin module and the locating grooves of said bottom block are disposed at different elevations. 
     
     
         16 . The heat pipe-attached heat sink as claimed in  claim 14 , wherein said flat protrusion of said bottom block defines a flat contact surface corresponding to the flat bottom abutment edges of the extension abutment strips of said first radiation fins of said radiation fin module. 
     
     
         17 . The heat pipe-attached heat sink as claimed in  claim 16 , wherein the flat contact surface of said flat protrusion of said bottom block and the flat bottom abutment edges of the extension abutment strips of said first radiation fins of said radiation fin module are disposed at different elevations.