Heat dissipation device

Abstract

A heat dissipation device includes a substrate, a fin assembly located on the substrate, a plurality of heat pipes connecting the substrate and the fin assembly, and a fan fixed on the substrate by a clip. The fin assembly includes a first fin unit, a second fin unit, and a third fin unit. The third fin unit is located on the substrate, the second fin unit is located on the third fin unit, and the first fin unit is located on the first fin unit. A receiving space is defined in the second and third fin unit. The fan is received in the receiving space and spaced apart from the fin assembly.

1 . A heat dissipation device comprising:
 a substrate comprising two blocks formed thereon and two panels extending therefrom;   a fin assembly comprising a plurality of parallel fins located on the substrate with a plurality of channels defined thereamong with a receiving space being defined in the fin assembly; and   a fan located on the substrate, the fan being attached to the two blocks and positioned between the two panels and received in the receiving space of the fin assembly and spaced from the fin assembly.   
   
   
       2 . The heat dissipation device as claimed in  claim 1 , further comprising a plurality of heat pipes connecting the substrate and the fin assembly. 
   
   
       3 . The heat dissipation device as claimed in  claim 1 , wherein the substrate comprises a square plate and a rectangular plate extending from an end thereof, the two panels sandwiching the rectangular plate and the blocks being formed on the rectangular plate and the fan being located on the rectangular plate. 
   
   
       4 . The heat dissipation device as claimed in  claim 3 , wherein the two blocks connect the two panels, respectively. 
   
   
       5 . The heat dissipation device as claimed in  claim 4 , wherein a bulge extends from each of the blocks and passes a corner of the fan. 
   
   
       6 . The heat dissipation device as claimed in  claim 3 , wherein a slot is defined in a free end of each of the two panels, and a pin is received in the slot. 
   
   
       7 . The heat dissipation device as claimed in  claim 6 , further comprising a clip fixing the fan onto the substrate, the clip having one end pivotably engaged with the pin at one panel, and another end engaged with the pin at another panel. 
   
   
       8 . The heat dissipation device as claimed in  claim 7 , wherein the clip comprises a pressing plate, two flexible plates extending from two opposite ends of the pressing plate, and two claws extending from a free end of each of the flexible plates, a sleeve being formed at a free end of one claw corresponding to one panel, receiving the pin at the one panel, and a hook being formed at a free end of another claw corresponding to the another panel for engaging the pin at the another panel. 
   
   
       9 . The heat dissipation device as claimed in  claim 1 , wherein each of the fins of the fin assembly comprises a main body and two flanges extending downwardly from two lateral sides of the main body. 
   
   
       10 . The heat dissipation device as claimed in  claim 9 , further comprising a supporting bar bending upwardly from a lateral side of the substrate and a step formed on a top of the supporting bar for supporting one of the flanges of one of the fins thereon. 
   
   
       11 . A heat dissipation device comprising:
 a substrate;   a fin assembly comprising a first fin unit, a second fin unit, and a third fin unit, the third fin unit located on the substrate, the second fin unit located on the third fin unit, the first fin unit located on the first fin unit, and a receiving space being defined in the second and third fin units;   a plurality of heat pipes each comprising a heat absorption portion arranged on the substrate and two heat dissipation portions extending upwardly from two ends of the heat absorption and inserting into the first, second and third fin units; and   a fan fixed on the substrate by a clip, the fan being received in the receiving space of the fin assembly and spaced from the fin assembly.   
   
   
       12 . The heat dissipation device as claimed in  claim 11 , wherein the first and second fin units each comprise a plurality of parallel main bodies and two flanges bending downwardly from two lateral sides of each of the main bodies, and the third fin unit comprises a main body and two flanges bending downwardly from two lateral sides of the main body of the third fin unit, the flanges of the third fin unit being higher than the flanges of the first and second fin units. 
   
   
       13 . The heat dissipation device as claimed in  claim 12 , wherein a supporting bar bends upwardly from a lateral side of the substrate and a step is formed on a top of the supporting bar for supporting one of the flanges of the third fin unit thereon. 
   
   
       14 . The heat dissipation device as claimed in  claim 12 , wherein a receiving hole is defined near an end of each of the main bodies of the second and third fin units to cooperatively define the receiving space. 
   
   
       15 . The heat dissipation device as claimed in  claim 12 , wherein an opening and a plurality of holes are defined in each of the main bodies of the first, second and third fin units, and for cooling air generated by the fan to flow. 
   
   
       16 . The heat dissipation device as claimed in  claim 11 , wherein the substrate comprises a square plate, two panels extending from an end of the square plate, and a rectangular plate extending from the end of the square plate and positioned between the two panels, the fan located on the rectangular plate and between the two panels. 
   
   
       17 . The heat dissipation device as claimed in  claim 16 , wherein two blocks are formed on the rectangular plate securing the fan, and two bulges are respectively formed on the two blocks for insertion into corners of the fan. 
   
   
       18 . The heat dissipation device as claimed in  claim 17 , wherein two pins are received in free ends of the two panels respectively, and the clip presses the fan with one end thereof pivoted to one pin, and another end thereof remains engaged with the other pin.