Heat dissipation apparatus

Abstract

A heat dissipation fan includes a first magnetic pole, and a second magnetic pole positioned in the first magnetic pole. A plurality of coils is positioned on the first magnetic pole. A plurality of fan blades is positioned on an inner surface of the second magnetic pole. When the current is applied, the magnetic field between the first and second magnetic poles generates a force on the first magnetic pole through the plurality of coils thereon. The first magnetic pole generates a counterforce on the second magnetic pole to rotate the plurality of fan blades.

1 . A heat dissipation fan, comprising:
 a first magnetic pole having a plurality of coils thereon; and   a second magnetic pole having a plurality of fan blades secured therein, the second magnetic pole positioned in the first magnetic pole;   wherein when a current is applied, the magnetic field between the first and second magnetic poles generates a force on the first magnetic pole through the plurality of coils thereon, the first magnetic pole generates a counterforce on the second magnetic pole to rotate the plurality of fan blades.   
     
     
         2 . The heat dissipation fan of  claim 1 , wherein the first and second magnetic poles are ring shape. 
     
     
         3 . The heat dissipation fan of  claim 2 , wherein the plurality of fan blades is integrally formed on an inner surface of the second magnetic pole; the fan blades extend from a at a hub to the inner surface of the second magnetic pole and are symmetric with respect to the connecting point. 
     
     
         4 . The heat dissipation fan of  claim 3 , further comprising an axle that extends outwards from the hub. 
     
     
         5 . The heat dissipation fan of  claim 4 , wherein the axle is connected to the first magnetic pole via a plurality of supporting ribs. 
     
     
         6 . The heat dissipation fan of  claim 2 , wherein a thickness of the first magnetic pole is greater than that of the second magnetic pole. 
     
     
         7 . The heat dissipation fan of  claim 6 , wherein the magnetic property on an inner surface of the first magnetic pole is opposite to that of on an outside surface of the second magnetic pole. 
     
     
         8 . A heat dissipation apparatus, comprising:
 a heat sink contacting 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; and 
   a fan positioned on a top of the heat sink, comprising:
 a first magnetic pole having a plurality of coils thereon; 
 a second magnetic pole having a plurality of fan blades secured therein, the second magnetic pole positioned in the first magnetic pole; 
 wherein when a current is applied, the magnetic field between the first and second magnetic poles generates a force on the first magnetic pole through the plurality of coils thereon, the first magnetic pole generates a counterforce on the second magnetic pole to rotate the plurality of fan blades. 
   
     
     
         9 . The heat dissipation apparatus of  claim 8 , wherein the first and second magnetic poles are ring shape, the magnetic property on an inner surface of the first magnetic pole is opposite to that of on an outside surface of the second magnetic pole. 
     
     
         10 . The heat dissipation apparatus of  claim 8 , wherein the top of the heat sink forms an air inlet, the fan is mounted to the heat sink. 
     
     
         11 . The heat dissipation apparatus of  claim 8 , wherein the heat sink further comprises 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. 
     
     
         12 . The heat dissipation apparatus of  claim 11 , wherein the fins and guiding members are integral with the base.