Heat dissipation device with heat pipe

Abstract

A heat dissipation device includes a heat pipe. The heat pipe includes an evaporating section connecting with a heat spreader, a condensing section connecting with a fin assembly, and a connecting section interconnecting the evaporating section and the condensing section. The evaporating section of the heat pipe has a diameter smaller than that of the condensing section.

1 . A heat dissipation device, comprising:
 a fin assembly;   a heat spreader; and   a heat pipe comprising an evaporating section, a condensing section, a connecting section interconnecting the evaporating section and the condensing section, wherein the evaporating section of the heat pipe has a diameter smaller than that of the condensing section, the evaporating section connecting with the heat spreader, the condensing section connecting with the fin assembly.   
   
   
       2 . The heat dissipation device as claimed in  claim 1 , wherein the evaporating section of the heat pipe is perpendicular to the condensing section. 
   
   
       3 . The heat dissipation device as claimed in  claim 1 , wherein the evaporating section has a uniform configuration. 
   
   
       4 . The heat dissipation device as claimed in  claim 1 , wherein the condensing section has a uniform configuration. 
   
   
       5 . The heat dissipation device as claimed in  claim 1 , wherein the evaporating section and the condensing section is coplanar. 
   
   
       6 . The heat dissipation device as claimed in  claim 1 , wherein the evaporating section and the condensing section is non-coplanar. 
   
   
       7 . The heat dissipation device as claimed in  claim 1 , wherein the connecting section of the heat pipe tapers from an end connecting the condensing section to another end connecting the evaporating section. 
   
   
       8 . The heat dissipation device as claimed in  claim 1 , wherein the diameter of the condensing section of the heat pipe is 8 mm, and that of the evaporating section of the heat pipe is 6 mm. 
   
   
       9 . The heat dissipation device as claimed in  claim 1 , further comprising a fan mounted in front of the fin assembly and over the heat spreader for generating an airflow through the fin assembly. 
   
   
       10 . A heat dissipation device, comprising:
 a heat spreader having a plurality of ears each being mounted with a fastener;   a fin assembly; and   at least one heat pipe comprising an evaporating section contacting the heat spreader, and a condensing section contacting the fin assembly, wherein the evaporating section is smaller than the condensing section.   
   
   
       11 . The heat dissipation device as claimed in  claim 10 , wherein the at least one heat pipe further comprises a connecting section interconnecting the evaporating section and the condensing section, the connecting section of the at least one heat pipe tapering from an end connecting the condensing section to another end connecting the evaporating section. 
   
   
       12 . The heat dissipation device as claimed in  claim 10 , wherein the heat spreader comprises a bottom plate and a top plate above the bottom plate, the bottom plate defining a first groove in a top thereof, the top plate defining a second groove in a bottom thereof, the first and second grooves cooperatively forming a channel receiving the evaporating section of the at least one heat pipe. 
   
   
       13 . The heat dissipation device as claimed in  claim 12 , wherein the top plate comprises a rectangular body, the plurality of ears extending from corners of the rectangular body. 
   
   
       14 . The heat dissipation device as claimed in  claim 10 , further comprising a fan mounted on one side of the fin assembly. 
   
   
       15 . The heat dissipation device as claimed in  claim 14 , further comprising a fixing bracket, the fixing bracket comprising a mounting portion and a positioning portion bent from a side of the mounting portion, the fan being mounted on the mounting portion, the positioning portion engaging in a slit defined in another side of the fin assembly.