Heat Dissipating Device And Heat Dissipating Fin

Abstract

A heat dissipating device includes a base, a heat pipe disposed on the base, and a plurality of first and second heat dissipating fins. Each first heat dissipating fin includes a fin body having a first through hole for extension of the heat pipe therethrough. The first and second heat dissipating fins are mounted on the heat pipe in a stack and in a spaced-apart alternating arrangement. Each second heat dissipating fin includes a fin body having a second through hole for extension of the heat pipe therethrough, two adjacent lateral edges, and a cut edge interconnecting the lateral edges such that each second heat dissipating fin has a smaller area than each first heat dissipating fin. Thus, the flow field resistance of the heat dissipating device can be reduced to increase the amount of airflow through the heat dissipating device for enhancing the heat dissipating efficiency.

1 . A heat dissipating device comprising:
 a base;   at least one heat pipe disposed on said base;   a plurality of first heat dissipating fin units, each of which includes a first heat dissipating fin that includes a fin body having at least one first through hole for extension of said heat pipe therethrough; and   a plurality of second heat dissipating fin units mounted on said heat pipe together with said first heat dissipating fin units in a stack and in a spaced-apart alternating arrangement, each of said second heat dissipating fin units including a second heat dissipating fin that includes a fin body having at least one second through hole for extension of said heat pipe therethrough, two adjacent lateral edges, and a first cut edge interconnecting said lateral edges such that said fin body of said second heat dissipating fin has a smaller area than said fin body of said first heat dissipating fin.   
     
     
         2 . The heat dissipating device of  claim 1 , wherein a shortest distance from said second through hole to said first cut edge is substantially equal to that from said second through hole to one of said lateral edges that are adjoined to said first cut edge. 
     
     
         3 . The heat dissipating device of  claim 1 , wherein said first and second heat dissipating fins of said first and second heat dissipating fin units cooperatively define an air intake end, said first cut edge of said fin body of said second heat dissipating fin of each of said second heat dissipating fin units being located at said air intake end. 
     
     
         4 . The heat dissipating device of  claim 3 , wherein said first and second heat dissipating fins of said first and second heat dissipating fin units cooperatively define an air exit end opposite to said air intake end, said fin body of said second heat dissipating fin of each of said second heat dissipating fin units further having another two adjacent lateral edges and a second cut edge that interconnects said another two lateral edges and that is located at said air exit end. 
     
     
         5 . The heat dissipating device of  claim 4 , wherein a shortest distance from said second through hole to said first cut edge is substantially equal to that from said second through hole to one of said lateral edges that are adjoined to said first cut edge, and a shortest distance from said second through hole to said second cut edge is substantially equal to that from said second through hole to one of said lateral edges that are adjoined to said second cut edge. 
     
     
         6 . The heat dissipating device of  claim 4 , wherein each of said first heat dissipating fins has a rectangular shape, and each of said second heat dissipating fins has a polygonal shape. 
     
     
         7 . The heat dissipating device of  claim 1 , wherein each of said second heat dissipating fins is disposed between each adjacent pair of said first heat dissipating fins. 
     
     
         8 . The heat dissipating device of  claim 1 , wherein each of said second heat dissipating fin units includes at least two of said second heat dissipating fins, which are disposed between each adjacent pair of said first heat dissipating fin units. 
     
     
         9 . The heat dissipating device of  claim 1 , comprising a plurality of said heat pipes disposed on said base, said fin body of each of said first heat dissipating fins having a plurality of said first through holes for extension of said heat pipes respectively therethrough, said fin body of each of said second heat dissipating fins having a plurality of said second through holes for extension of said heat pipes respectively therethrough. 
     
     
         10 . The heat dissipating device of  claim 9 , wherein said first and second heat dissipating fins of said first and second heat dissipating fin units cooperatively define an air intake end, said first cut edge of said fin body of said second heat dissipating fin of each of said second heat dissipating fin units being located at said air intake end. 
     
     
         11 . The heat dissipating device of  claim 10 , wherein said first and second heat dissipating fins of said first and second heat dissipating fin units cooperatively define an air exit end opposite to said air intake end, said fin body of said second heat dissipating fin of each of said second heat dissipating fin units further having another two adjacent lateral edges, and a second cut edge that interconnects said another two lateral edges and that is located at said air exit end. 
     
     
         12 . The heat dissipating device of  claim 11 , wherein a shortest distance from said second through hole to said first cut edge is substantially equal to that from said second through hole to one of said lateral edges that are adjoined to said first cut edge, and a shortest distance from said second through hole to said second cut edge is substantially equal to that from said second through hole to one of said lateral edges that are adjoined to said second cut edge. 
     
     
         13 . The heat dissipating device of  claim 11 , wherein each of said first heat dissipating fins has a rectangular shape, and each of said second heat dissipating fins has a polygonal shape. 
     
     
         14 . A heat dissipating fin comprising:
 a fin body having
 a through hole, 
 two adjacent lateral edges, and 
 a first cut edge interconnecting said lateral edges. 
   
     
     
         15 . The heat dissipating fin of  claim 14 , wherein a shortest distance from said second through hole to said first cut edge is substantially equal to that from said second through hole to one of said lateral edges that are adjoined to said first cut edge. 
     
     
         16 . The heat dissipating fin of  claim 14 , wherein said fin body further has another two adjacent lateral edges and a second cut edge interconnecting said another two lateral edges and located opposite to said first cut edge. 
     
     
         17 . The heat dissipating fin of  claim 16 , wherein a shortest distance from said through hole to said second cut edge is substantially equal to that from said through hole to one of said lateral edges that are adjoined to said second cut edge. 
     
     
         18 . A heat dissipating device comprising:
 a base;   two heat pipes disposed on said base;   a plurality of first heat dissipating fin units, each of which includes a first heat dissipating fin that includes a fin body having two first through holes for extension of said heat pipes respectively therethrough; and   a plurality of second heat dissipating fin units mounted on said heat pipes together with said first heat dissipating fin units in a stack and in a spaced-apart alternating arrangement, each of said second heat dissipating fin units including at least two second heat dissipating fins that are disposed between each adjacent pair of said first heat dissipating fin units and that are mounted respectively on said heat pipes to cooperatively define an airflow channel between said two second heat dissipating fins, each of said second heat dissipating fins including a fin body having a second through hole for extension of a corresponding one of said heat pipes therethrough, and having a smaller area than said fin body of said first heat dissipating fin.   
     
     
         19 . The heat dissipating device of  claim 18 , wherein said fin body of each of said second heat dissipating fins has two adjacent lateral edges and a first cut edge interconnecting said lateral edges, said first and second heat dissipating fins of said first and second heat dissipating fin units cooperatively defining an air intake end, said first cut edge of said fin body of each of said second heat dissipating fins being disposed at said air intake end. 
     
     
         20 . The heat dissipating device of  claim 19 , wherein said first and second heat dissipating fins of said first and second heat dissipating fin units cooperatively define an air exit end opposite to said air intake end, said fin body of each of said second heat dissipating fins further having another two adjacent lateral edges and a second cut edge that interconnects said another two lateral edges and that is disposed at said air exit end. 
     
     
         21 . The heat dissipating device of  claim 20 , wherein a shortest distance from said second through hole to said first cut edge is substantially equal to that from said second through hole to one of said lateral edges that are adjoined to said first cut edge, and a shortest distance from said second through hole to said second cut edge is substantially equal to that from said second through hole to one of said lateral edges that are adjoined to said second cut edge.