Fan frame structure

Abstract

A fan frame structure includes a plastic frame and a metal reinforcing member. The inner side of the frame defines a flow passage for receiving a fan wheel. The metal reinforcing member is joined to the frame intimately. The inner side of the frame is arranged to have a largest diameter so that the flow passage provides more space for accommodating a larger sized fan wheel. Hence, strength of the frame is reinforced, vibration and noise are reduced during a fan wheel running and integral effect of heat dissipation is enhanced largely.

1 . A fan frame structure, comprising: 
 a plastic frame member with an inner side and an outer side, the inner side defining a flow passage with an inlet and an outlet being disposed at two ends thereof, the outer side defining the size thereof, at least a receiving part being provided; and    a metal reinforcing member, being joined to the receiving part intimately;    wherein, the inner side is arranged to have a largest diameter so that the flow passage provides more space for accommodating a large sized fan wheel;    whereby, strength of the frame member is reinforced, vibration and noise are reduced during a fan wheel running and integral effect of heat dissipation is enhanced largely.    
   
   
       2 . The fan frame structure as defined in  claim 1 , wherein the receiving part is disposed at the inner side for the reinforcing member being joined to the receiving part intimately.  
   
   
       3 . The fan frame structure as defined in  claim 1 , wherein the receiving part is disposed at the outer side for the reinforcing member being joined to the receiving part intimately.  
   
   
       4 . The fan frame structure as defined in  claim 1 , wherein the receiving part is disposed between the inner side and the outer side for the reinforcing member being joined to the receiving part intimately between the outer side and the inner side.  
   
   
       5 . The fan frame structure as defined in  claim 1 , wherein the plastic frame provides a volume more than that of the reinforcing member.  
   
   
       6 . The fan frame structure as defined in  claim 1 , wherein the reinforcing member provides a shape of ring plate.  
   
   
       7 . The fan frame structure as defined in  claim 1 , wherein the reinforcing member is composed of at least a pair of strip shaped plates.  
   
   
       8 . The fan frame structure as defined in  claim 1 , wherein at least a thinnest section is provided at the frame between the outer and inner sides and the reinforcing member is joined to the thinnest section.  
   
   
       9 . The fan frame structure as defined in  claim 1 , wherein at least an engaging recess is provided in the receiving part.  
   
   
       10 . The fan frame structure as defined in  claim 10 , wherein the reinforcing member provides at least an engaging projection corresponding to the engaging recess.  
   
   
       11 . A fan frame structure, comprising: 
 a plastic frame member with an inner side and an outer side, the inner side defining a flow passage with an inlet and an outlet being disposed at two ends thereof, the outer side defining the size thereof and a plurality of dove tail grooves being provided at four lateral sections of the outer side ; and    a metal reinforcing member with four lateral sides, providing a plurality of dove tail corresponding to the dove tail grooves for engaging with the frame and surrounding the frame.    wherein, the inner side is arranged to have a largest diameter so that the flow passage provides more space for accommodating a large sized fan wheel;    whereby, strength of the frame member is reinforced, vibration and noise are reduced during a fan wheel running and integral effect of heat dissipation is enhanced largely.    
   
   
       12 . A fan frame structure, comprising: 
 a plastic frame member with an inner side and an outer side, the inner side defining a flow passage, the outer side defining the size thereof and providing a plurality of engaging holes; and    a metal reinforcing member, providing a shape the same as the frame, having a plurality of engaging projections corresponding to the engaging holes for being joined to each other intimately;    wherein, the inner side is arranged to have a largest diameter so that the flow passage provides more space for accommodating a large sized fan wheel;    whereby, strength of the frame is reinforced, vibration and noise are reduced during a fan wheel running and integral effect of heat dissipation is enhanced largely.    
   
   
       13 . The fan frame structure as defined in  claim 12 , wherein the reinforced member provides an inlet and the frame provides an outlet.  
   
   
       14 . The fan frame structure as defined in  claim 12 , wherein the reinforced member provides an outlet and the frame provides an inlet.  
   
   
       15 . The fan frame structure as defined in  claim 12 , wherein the frame is composed of two frame parts with an inlet at one of the frames and an outlet at the other one of frame parts and the reinforcing member is sandwiched between the frame parts.  
   
   
       16 . The fan frame structure as defined in  claim 12 , wherein the reinforced member provides a plurality of air apertures at the lateral sides thereof.  
   
   
       18 . The fan frame structure as defined in  claim 1 , wherein reinforcing member is made of compound material such as polymeric fiber, carbon fiber, plastic fiber or carbon-plastic fiber instead.  
   
   
       19 . The fan frame structure as defined in  claim 11 , wherein reinforcing member is made of compound material such as polymeric fiber, carbon fiber, plastic fiber or carbon-plastic fiber instead.  
   
   
       20 . The fan frame structure as defined in  claim 12 , wherein reinforcing member is made of compound material such as polymeric fiber, carbon fiber, plastic fiber or carbon-plastic fiber instead.