Cooling fan assembly capable of adjusting air flow direction

Abstract

A cooling fan assembly includes a base, a dial knob and a blade wheel. The base provides a shape of channel and having a hollow part with an annular rail. The dial knob is received in and joined to the hollow part and provides a plurality of projections at the circumferential wall thereof to fit with the annular rail with at least an air discharge hole at the circumferential wall thereof. The blade wheel is mounted in the base. The dial knob can be turned to adjust direction of discharged air flow. Hence, the discharged air can move toward other chip sets in addition to dissipating heat of the chip processor under the cooling fin such that a single radiating structure can cool both the chip processor and the other chip sets.

1 . A cooling fan assembly capable of adjusting air flow direction, comprising: 
 a base, providing a shape of channel and having a hollow part with an annular rail;    a dial knob, being received and joined to the hollow part, providing a plurality of projections at the circumferential wall thereof to fit with the annular rail and having at least an air discharge hole at the circumferential wall; and    a blade wheel, being mounted in the base;    whereby, the dial knob can be turned to adjust direction of discharged air flow.    
   
   
       2 . The cooling fan assembly capable of adjusting air flow direction as defined in  claim 1 , wherein the base is made of heat resistant material and provides a plurality of threaded holes and a cooling fin set below the base is attached to the base.  
   
   
       3 . The cooling fan assembly capable of adjusting air flow direction as defined in  claim 1 , wherein an annular rib is disposed at the bottom side of the hollow part with a circumference slightly greater than the hollow part and slightly less than the circumference formed with the projections so that the dial knob fits with the recess rail by a pressing force.  
   
   
       4 . The cooling fan assembly capable of adjusting air flow direction as defined in  claim 1 , wherein the hollow part has a shape corresponding to the dial knob.  
   
   
       5 . The cooling fan assembly capable of adjusting air flow direction as defined in  claim 1 , wherein the dial knob has a shape diverging downward from a close top thereof with an armature being disposed at the inner side of the close top and has an open bottom for receiving the blade wheel.  
   
   
       6 . The cooling fan assembly capable of adjusting air flow direction as defined in  claim 1 , wherein the inner side of the air hole has a gradually raised area from an end thereof along with the circumferential wall of the dial knob to another end of the air hole so that the air flow between blades of the blade wheel and the circumferential wall of the inner side of the dial knob can be compressed due to the clearance getting smaller and increasing instantaneous impulse.  
   
   
       7 . The cooling fan assembly capable of adjusting air flow direction as defined in  claim 1 , wherein the periphery of the air hole at least at a lateral edge thereof has a curved part assisting adjustment of the air flow direction and the curved part provides an angular distance bending outward to allow air spray angle of the dial knob can be more accurate due to being guided with the curved part.  
   
   
       8 . The cooling fan assembly capable of adjusting air flow direction as defined in  claim 1 , wherein the outer side of the circumferential wall of the dial knob provides a regularly or irregularly continuous uneven shape to constitute a gripped part.  
   
   
       9 . The cooling fan assembly capable of adjusting air flow direction as defined in  claim 1 , wherein blade wheel has a circular side plate and a plurality of curved blades the inner side of the circular side plate and when the blade wheel rotates, the air is sucked into the blade wheel via inner space thereof and guided via the curved blades by way of centrifugal movement.  
   
   
       10 . The cooling fan assembly capable of adjusting air flow direction as defined in  claim 1 , wherein the blades further join a circular ring at another sides thereof to reinforce the strength of the blade wheel.  
   
   
       11 . The cooling fan assembly capable of adjusting air flow direction as defined in  claim 5 , wherein the inner side of the air hole has a gradually raised area from an end thereof along with the circumferential wall of the dial knob to another end of the air hole so that the air flow between blades of the blade wheel and the circumferential wall of the inner side of the dial knob can be compressed due to the clearance getting smaller and increasing instantaneous impulse.  
   
   
       12 . The cooling fan assembly capable of adjusting air flow direction as defined in  claim 5 , wherein the periphery of the air hole at least at a lateral edge thereof has a curved part assisting adjustment of the air flow direction and the curved part provides an angular distance bending outward to allow air spray angle of the dial knob can be more accurate due to being guided with the curved part.  
   
   
       13 . The cooling fan assembly capable of adjusting air flow direction as defined in  claim 5 , wherein the outer side of the circumferential wall of the dial knob provides a regularly or irregularly continuous uneven shape to constitute a gripped part.