Heat sink having juxtaposed heat pipes and method for manufacturing the same

Abstract

The present invention relates to a heat sink having juxtaposed heat pipes and a method for manufacturing the same. The heat sink includes a base, a plurality of heat pipes and a pair of side strips. The base has a surface on which an open trough and an insertion trough on both sides of the open trough are provided. Each heat pipe has an evaporating section. The evaporating sections are juxtaposed in the open trough and adhered to each other. Each evaporating section has a planar surface. The side strips are fixed into the insertion troughs and protrude from the surface of the base. The planar surface of each evaporating section and the outer surface of each side strip are coplanar. By this structure, the thermal contact surface between the heat pipes and electronic heat-generating sources is increased, so that the heat-dissipating efficiency of the heat sink is improved.

1 . A heat sink having juxtaposed heat pipes, including:
 a base having a surface, the surface being provided with an open trough and insertion troughs on both sides of the open trough;   a plurality of heat pipes each having an evaporating section, the evaporating sections being juxtaposed into the open trough and adhered to each other, each of the evaporating sections having a planar surface; and   a pair of side strips fixed into the insertion troughs and protruding from the surface of the base, the planar surfaces of the evaporating sections and outer surfaces of the side strips being coplanar.   
     
     
         2 . The heat sink having juxtaposed heat pipes according to  claim 1 , wherein the base is an aluminum-made element. 
     
     
         3 . The heat sink having juxtaposed heat pipes according to  claim 2 , wherein a middle portion of the base is formed with a protruding stage, the surface is formed on the protruding stage. 
     
     
         4 . The heat sink having juxtaposed heat pipes according to  claim 3 , wherein the open trough comprises at least two grooves, at least one dividing strip is formed between any adjacent two of the grooves, a top surface of a free end of the dividing strip is located in a level lower than that of the surface, so that a height difference is formed between the dividing strip and the surface. 
     
     
         5 . The heat sink having juxtaposed heat pipes according to  claim 1 , wherein the heat-conducting coefficient of the side strip is larger than that of the base. 
     
     
         6 . The heat sink having juxtaposed heat pipes according to  claim 1 , wherein the side strip is a copper-made element. 
     
     
         7 . The heat sink having juxtaposed heat pipes according to  claim 1 , further including a heat-dissipating fin set connected above the base. 
     
     
         8 . The heat sink having juxtaposed heat pipes according to  claim 7 , wherein the heat-dissipating fin set is provided with a plurality of communicating holes, each of the heat pips has a condensing section extending from the evaporating section, the condensing sections are disposed into the communicating holes. 
     
     
         9 . A heat sink having juxtaposed heat pipes, including:
 a base having a surface, the surface being provided with an open trough;   a plurality of heat pipes each having an evaporating section, the evaporating sections being juxtaposed into the open trough and adhered to each other, each of the evaporating sections having a planar surface; and   a pair of side strips fixed into base and protruding from the surface of the base, the planar surfaces of the evaporating sections and outer surfaces of the side strips being coplanar.   
     
     
         10 . The heat sink having juxtaposed heat pipes according to  claim 9 , wherein the base is an aluminum-made element. 
     
     
         11 . The heat sink having juxtaposed heat pipes according to  claim 10 , wherein a middle portion of the base is formed with a protruding stage, the surface is formed on the protruding stage. 
     
     
         12 . The heat sink having juxtaposed heat pipes according to  claim 11 , wherein the open trough comprises at least two grooves, at least one dividing strip is formed between any adjacent two of the grooves, a top surface of a free end of the dividing strip is located in a level lower than that of the surface, so that a height difference is formed between the dividing strip and the surface. 
     
     
         13 . The heat sink having juxtaposed heat pipes according to  claim 9 , wherein the heat-conducting coefficient of the side strip is larger than that of the base. 
     
     
         14 . The heat sink having juxtaposed heat pipes according to  claim 9 , wherein the side strip is a copper-made element. 
     
     
         15 . The heat sink having juxtaposed heat pipes according to  claim 9 , further including a heat-dissipating fin set connected above the base. 
     
     
         16 . The heat sink having juxtaposed heat pipes according to  claim 15 , wherein the heat-dissipating fin set is provided with a plurality of communicating holes, each of the heat pips has a condensing section extending from the evaporating section, the condensing sections are disposed into the communicating holes. 
     
     
         17 . A method for manufacturing a heat sink having juxtaposed heat pipes, the method including steps of:
 a) providing a base having an open trough;   b) applying solder on inner walls and both sides of the open trough;   c) providing a plurality of heat pipes and a pair of side strips, one end of each heat pipe being juxtaposed in the open trough, the pair of side strips being adhered to the base and located on both sides of each heat pipe;   d) providing a heating apparatus, disposing a semi-finished product after the step c) into the heating apparatus, thereby soldering the heat pipes and the side strips on the base; and   e) providing a pressing die for pressing the heat pipes and the side strips, whereby the heat pipes are adhered to each other and formed with a planar surface coplanar with the side strips.   
     
     
         18 . The method according to  claim 17 , wherein the base is provided with an insertion trough on both sides of the open trough respectively, the solder is applied on inner walls of the insertion troughs, the side strips are inserted into the insertion troughs. 
     
     
         19 . The method according to  claim 17 , wherein the planar surface of each heat pipe and the side strips protrude from the surface of the base. 
     
     
         20 . The method according to  claim 17 , further including a step f) of providing a grinding tool for grinding the planar surfaces of the heat pipes and the side strips.