Heat dissipation apparatus

Abstract

A heat dissipation apparatus includes a heat sink configured to contact a heat source, and a fan mounted to the heat sink. The heat sink includes a base with a bottom surface for contacting the heat source, and a plurality of radial fins angling upwardly from a top surface of the base to form a truncated conical space in the middle of the heat sink. A cross section area of the truncated conical space gradually increases from the top surface of the base to top of the fins.

1 . A heat dissipation apparatus comprising:
 a base with a bottom surface; and   a plurality of radial fins angling upwardly from a top surface of the base to form a truncated conical space, a cross section area of the truncated conical space gradually increasing from the top surface of the base to a top of the fins, and a top of the truncated conical space forming an air inlet for the heat sink.   
   
   
       2 . The heat dissipation apparatus of  claim 1 , further comprising two guiding members formed behind each outside fin to define an air outlet therebetween, with airflow from the air inlet passing through the fins and out the air outlet. 
   
   
       3 . The heat dissipation apparatus of  claim 2 , wherein the fins and guiding members are integrally formed with the base. 
   
   
       4 . A heat dissipation apparatus, comprising:
 a fan configured to generate airflow; and   a heat sink configured to contact a heat source, comprising:
 a base with a bottom surface contacting the heat source; 
 a plurality of radial fins angling upwardly from a top surface of the base to form a truncated conical space, a cross section area of the truncated conical space gradually increasing from the top surface of the base to a top of the fins, and a top of the truncated conical space forming an air inlet for the heat sink. 
   
   
   
       5 . The heat dissipation apparatus of  claim 4 , further comprising two guiding members formed behind each outside fin to define an air outlet therebetween, with airflow from the fan passing through the fins and out the air outlet. 
   
   
       6 . The heat dissipation apparatus of  claim 5 , wherein the fan is round and mounted to the air inlet of the heat sink. 
   
   
       7 . The heat dissipation apparatus of  claim 5 , wherein the fan is mounted to the heat sink by glue. 
   
   
       8 . The heat dissipation apparatus of  claim 5 , wherein the fins and guiding members are integrally formed with the base.