Fan enabling increased air volume

Abstract

A fan enabling increased air volume includes at least a fan wheel and a driving unit for driving the fan wheel to maintain a uniform rotating speed. The fan wheel includes a hub and a plurality of blades radially extended from an outer periphery of the hub. The blades may be arranged on the hub in different manners, such as having a preceding blade overlapped a following blade, or having a blade root installation angle smaller than 53° and a blade tip inclination angle smaller than 46°, or having a solidity of blade roots larger than 1.5 and a solidity of blade tips larger than 1, so that the fan wheel produces increased air volume and accordingly enhanced cooling power at the uniform rotating speed.

1 . A fan enabling increased air volume, comprising at least a fan wheel, and a driving unit for driving said fan wheel to maintain a uniform rotating speed; said fan wheel including a hub and a plurality of blades radially extended from an outer periphery of said hub, and each of said blades in a preceding position overlapping another blade immediately following said preceding blade, so that said fan wheel produces increased air volume and accordingly enhanced cooling power at said uniform rotating speed.  
   
   
       2 . The fan enabling increased air volume as claimed in  claim 1 , wherein said a plurality of blades overlap one another in such a manner that a blade root and a blade body of said preceding blade overlap a blade root and a blade body of said following blade.  
   
   
       3 . The fan enabling increased air volume as claimed in  claim 1 , wherein said a plurality of blades overlap one another in such a manner that a blade root of said preceding blade overlaps a blade root of said following blade.  
   
   
       4 . The fan enabling increased air volume as claimed in  claim 1 , wherein said a plurality of blades overlap one another in such a manner that a blade body of said preceding blade overlaps a blade body of said following blade.  
   
   
       5 . The fan enabling increased air volume as claimed in  claim 1 , further comprising a housing in which said fan wheel and said driving unit are mounted.  
   
   
       6 . The fan enabling increased air volume as claimed in  claim 1 , wherein said driving unit includes a driving circuit board.  
   
   
       7 . The fan enabling increased air volume as claimed in  claim 1 , wherein said uniform rotating speed of said fan wheel has a deviation within a range of ±8%.  
   
   
       8 . A fan enabling increased air volume, comprising at least a fan wheel, and a driving unit for driving said fan wheel to maintain a uniform rotating speed; said fan wheel including a hub and a plurality of blades radially extended from an outer periphery of said hub, and a blade root of each of said a plurality of blades has an installation angle smaller than 53°, and a blade tip of each of said a plurality of blades has an inclination angle smaller than 46°, so that said fan wheel produces increased air volume and accordingly enhanced cooling power at said uniform rotating speed.  
   
   
       9 . The fan enabling increased air volume as claimed in  claim 8 , wherein said driving unit includes a driving circuit board.  
   
   
       10 . The fan enabling increased air volume as claimed in  claim 8 , further comprising a housing in which said fan wheel and said driving unit are mounted.  
   
   
       11 . The fan enabling increased air volume as claimed in  claim 8 , wherein said uniform rotating speed of said fan wheel has a deviation within a range of ±8%.  
   
   
       12 . A fan enabling increased air volume, comprising at least a fan wheel, and a driving unit for driving said fan wheel to maintain a uniform rotating speed; said fan wheel including a hub and a plurality of blades radially extended from an outer periphery of said hub, and said a plurality of blades have a solidity of blade roots larger than 1.5, and a solidity of blade tips larger than 1, so that said fan wheel produces increased air volume and accordingly enhanced cooling power at said uniform rotating speed.  
   
   
       13 . The fan enabling increased air volume as claimed in  claim 12 , wherein said driving unit includes a driving circuit board.  
   
   
       14 . The fan enabling increased air volume as claimed in  claim 12 , further comprising a housing in which said fan wheel and said driving unit are mounted.  
   
   
       15 . The fan enabling increased air volume as claimed in  claim 12 , wherein said uniform rotating speed of said fan wheel has a deviation within a range of ±8%.