Heat-dissipating device

Abstract

A heat-dissipating device comprises a heat-dissipating member, at least one heat-dissipating fan, and a rotation control unit. The heat-dissipating member has an airflow chamber inside and includes a plurality of air-guiding holes in communication with the airflow chamber. Each of the at least one heat-dissipating fan has two air-guiding portions, wherein one of the air-guiding portions is aligned with one of the air-guiding holes of the heat-dissipating member. The rotation control unit communicates with and controls the at least one heat-dissipating fan. Accordingly, the heat-dissipating device with a dust auto-removing function can provide a balanced heat-dissipating effect.

1 . A heat-dissipating device comprising:
 a heat-dissipating member having an airflow chamber inside and including a plurality of air-guiding holes in communication with the airflow chamber;   at least one heat-dissipating fan with each heat-dissipating fan having two air-guiding portions, wherein one of air-guiding portions is aligned with one of the air-guiding holes of the heat-dissipating member; and   a rotation control unit communicating with and controlling the at least one heat-dissipating fan, wherein the rotation control unit sends a rotating direction control signal to actuate the at least one heat-dissipating fan for driving the impeller to rotate in a first direction or in a second direction.   
     
     
         2 . The heat-dissipating device as claimed in  claim 1 , wherein the number of the air-guiding holes of the heat-dissipating member is two being defined as a first and a second air-guiding holes, with the number of the at least one heat-dissipating fan being one and one of the air-guiding portions being aligned with the first air-guiding hole. 
     
     
         3 . The heat-dissipating device as claimed in  claim 1 , wherein the number of the air-guiding holes of the heat-dissipating member is two being defined as a first air-guiding hole and a second air-guiding hole, with the number of the at least one heat-dissipating fan being two being defined as a first heat-dissipating fan and a second heat-dissipating fan, with one of the air-guiding portions of the first heat-dissipating fan being aligned with the first air-guiding hole while one of the air-guiding portions of the second heat-dissipating fan is aligned with the second air-guiding hole. 
     
     
         4 . The heat-dissipating device as claimed in  claim 1 , wherein the number of the air-guiding holes of the heat-dissipating member is three being defined as a first air-guiding hole, a second air-guiding hole and a third air-guiding hole, with the number of the at least one heat-dissipating fan being two being defined as a first heat-dissipating fan and a second heat-dissipating fan, with one of the air-guiding portions of the first heat-dissipating fan being aligned with the first air-guiding hole while one of the air-guiding portions of the second heat-dissipating fan is aligned with the second air-guiding hole. 
     
     
         5 . The heat-dissipating device as claimed in  claim 4 , wherein the third air-guiding hole is defined between the first air-guiding hole and the second air-guiding hole. 
     
     
         6 . The heat-dissipating device as claimed in  claim 1 , wherein at least one temperature sensor is mounted to the airflow chamber and electrically connected with the rotation control unit. 
     
     
         7 . The heat-dissipating device as claimed in  claim 1 , with the heat-dissipating member being a hollow casting made of heat-conducting material. 
     
     
         8 . The heat-dissipating device as claimed in  claim 1 , wherein the at least one heat-dissipating fan is axial type.