Heat dissipation apparatus having a heat pipe inserted therein

Abstract

A heat dissipation apparatus includes a heat sink and a heat pipe thermally connecting with the heat sink. The heat sink includes a plurality of radial fins. Each of the fins defines a receiving hole therein, and extends out a flange around the receiving hole. A height of the flange increases outwardly in a direction away from a center of the heat sink. The heat pipe includes an evaporation section and an arcuate condensation section. The condensation section of the heat pipe extends through the receiving hole, and is attached to the flanges of the heat sink.

1 . A heat dissipation apparatus, comprising:
 a heat sink comprising a plurality of radial fins, each of the fins defining at least one receiving hole therein, and extending out at least one flange around the least one receiving hole, a height of the at least one flange increasing outwardly in a direction away from a center of the heat sink; and   at least one heat pipe thermally connecting with the heat sink, the at least one heat pipe comprising an evaporation section and an arcuate condensation section, the condensation section of the at least one heat pipe extending through the at least one receiving hole, and being attached to the at least one flange of the heat sink.   
   
   
       2 . The heat dissipation apparatus of  claim 1 , wherein a free end surface of the at least one flange is planar, and angles from a corresponding fin. 
   
   
       3 . The heat dissipation apparatus of  claim 1 , wherein the heat sink comprises a pair of first fin assemblies, and a pair of second fin assemblies alternate with the pair of first fin assemblies, the first fin assemblies each being stacked by a plurality of first fins, the second fin assemblies each being stacked by a plurality of second fins, the first fins and the second fins cooperatively forming the radial fins of the heat sink. 
   
   
       4 . The heat dissipation apparatus of  claim 3 , wherein the second fin assemblies each further defining an opening at a lower side thereof in communication with the at least one receiving hole of each second fin of a corresponding second fin assembly, a part of the condensation section of the at least one heat pipe being inserted into the at least one receiving hole of each first fin of each first fin assembly, and another part of the condensation section entering into the at least one receiving hole of each second fin of each second fin assembly through the opening of the corresponding second fin assembly. 
   
   
       5 . The heat dissipation apparatus of  claim 3 , wherein the at least one receiving hole comprises a first receiving hole and a second receiving hole, the at least one flange comprising a first flange and a second flange, each fin of the first and second fin assemblies defining the first and second receiving holes, and extending the first and second flanges respectively around the first and second receiving hole, the first and second receiving holes of each first fin assembly respectively aligning with the first and second receiving holes of each second fin assembly, the at least one heat pipe comprising a pair of first heat pipes and a pair of second heat pipes, the condensation sections of the first heat pipes extending through the first receiving holes of the first and second fin assemblies, and being attached to the first flanges of the first and second fin assemblies, the condensation sections of the second heat pipes extending through the second receiving holes of the first and second fin assemblies, and being attached to the second flanges of the first and second fin assemblies. 
   
   
       6 . The heat dissipation apparatus of  claim 5 , wherein each of the first heat pipes further comprises an adiabatic section interconnecting the evaporation section and the condensation section thereof, the adiabatic section of each of the first heat pipes extending upwardly and slantwise from one end of the evaporation section of each of the first heat pipes, each of the second heat pipes further comprising an adiabatic section interconnecting the evaporation section and the condensation section thereof, the adiabatic section of each of the second heat pipes extending upwardly and slantwise from one end of the evaporation section of each of the second heat pipes, the condensation sections of the first heat pipes being lower than the condensation sections of the second heat pipes. 
   
   
       7 . The heat dissipation apparatus of  claim 1 , wherein each of the fins extends a protrusion adjacent to an inner side thereof, and defines a fixing hole through the protrusion, an outer diameter of the protrusion being gradually decreased from the fin to a neighboring fin, the protrusion being inserted into the fixing hole of the neighboring fin. 
   
   
       8 . The heat dissipation apparatus of  claim 1 , wherein each of the fins comprises a main body and an extension arm extending upwardly from an outer side of the main body, the extension arm having a width less than that of the main body, the extension arms of the fins cooperatively defining a recessed space at a top end of the heat sink, a fan being mounted in the space. 
   
   
       9 . A heat dissipation apparatus, comprising:
 an annular heat sink comprising a plurality of radial fins, each of the fins defining at least one receiving hole therein, and extending out at least one flange from an outer edge of the least one receiving hole; and   at least two heat pipes thermally connecting with the heat sink, each of the at least two heat pipes comprising an evaporation section, an adiabatic section extending upwardly and slantwise from the evaporation section, and a semicircular condensation section extending from the adiabatic section, the condensation sections of the at least two heat pipes cooperatively forming a circle, and being received in the at least one receiving hole of each of the fins, a height of the at least one flange gradually increasing along a direction from a center of the heat sink towards an outer periphery of the heat sink, for preventing the condensation sections of the at least two heat pipes from being blocked by the at least one flange when the condensation sections extends through the at least one receiving hole of each of the fins.   
   
   
       10 . The heat dissipation apparatus of  claim 9 , wherein a free end surface of the at least one flange is planar, and angles from a corresponding fin. 
   
   
       11 . The heat dissipation apparatus of  claim 9 , wherein the heat sink comprises a pair of first fin assemblies, and a pair of second fin assemblies alternate with the pair of first fin assemblies, the fins comprising a plurality of first fins and a plurality of second fins, the first fin assemblies each being stacked by the first fins, the second fin assemblies each being stacked by the second fins, the at least one receiving hole in each of the first fins being circular, the at least one receiving hole in each of the second fins being semicircular. 
   
   
       12 . The heat dissipation apparatus of  claim 9 , wherein each of the fins comprises a main body and an extension arm extending upwardly from an outer side of the main body, the extension arm having a width less than that of the main body, the extension arms of the fins cooperatively defining a recessed space at a top end of the heat sink, a fan being mounted in the space. 
   
   
       13 . The heat dissipation apparatus of  claim 9 , further comprising a base, the evaporation sections of the at least two heat pipes being mounted on the base.