Heat sink assembly of fin module and heat pipes

Abstract

A heat sink assembly includes a fin module, heat pipes, and a pair of side plates. The fin module is composed of a plurality of fins and has a flat side formed with a trough and two recesses. Each of the heat pipes has an evaporation section. The evaporation sections are parallelly accommodated in the trough and in contact with each other. The side plates are separately fixed in the recesses and protrude from the flat side. The evaporation sections are formed with a flat surface coplanar with the side plates. By this arrangement, the thermal contact area between the heat pipes and a heat source is increased to thereby improve the heat-dissipating efficiency of the heat sink assembly.

1 . A heat sink assembly, comprising:
 a fin module, composed of a plurality of fins, having a flat side formed with a trough and two recesses;   a plurality of heat pipes, each having an evaporation section, wherein the evaporation sections are parallelly accommodated in the trough and in contact with each other; and   a pair of side plates, separately fixed in the recesses and located higher than the flat side, wherein the evaporation sections are formed with a flat surface coplanar with outer surfaces of the side plates.   
     
     
         2 . The heat sink assembly of  claim 1 , wherein the trough comprises at least two sub-troughs, a separation section is formed between any two adjacent sub-troughs, a top surface of a free end of the separation section is located in a level lower than that of the flat side, and the separation sections are lower than the flat side in level to form a height difference. 
     
     
         3 . The heat sink assembly of  claim 1 , wherein the coefficient of thermal conductivity of the side plates are higher than that of the fins. 
     
     
         4 . The heat sink assembly of  claim 1 , wherein the side plates are made of copper. 
     
     
         5 . The heat sink assembly of  claim 1 , wherein the fin module is formed with through holes, and each of the heat pipes comprises a condensation section extending from the evaporation section and penetrating one of the through holes. 
     
     
         6 . The heat sink assembly of  claim 1 , wherein each of the fins is formed with a bent flange at the trough respectively and the evaporation sections are soldered to the bent flanges. 
     
     
         7 . The heat sink assembly of  claim 1 , wherein each of the fins is formed with a bent flange at the recess respectively, and the side plates are soldered to the bent flanges. 
     
     
         8 . A heat sink assembly, comprising:
 a fin module, composed of a plurality of fins, having a flat side formed with a trough; and   a plurality of heat pipes, each having an evaporation section, wherein the evaporation sections are parallelly accommodated in the trough and in contact with each other, and the evaporation sections are formed with a flat surface higher than the flat side in level.   
     
     
         9 . The heat sink assembly of  claim 8 , wherein the trough comprises at least two sub-troughs, a separation section is formed between any two adjacent sub-troughs, a top surface of a free end of the separation section is located in a level lower than that of the flat side, and the separation sections are lower than the flat side in level to form a height difference. 
     
     
         10 . The heat sink assembly of  claim 8 , wherein the fin module is formed with through holes, and each of the heat pipes comprises a condensation section extending from the evaporation section and penetrating one of the through holes. 
     
     
         11 . The heat sink assembly of  claim 8 , wherein the fins are formed with bent flanges at the trough, and the evaporation sections are soldered to the bent flanges.