Fan and fan housing thereof

Abstract

A fan includes an impeller, a fan housing and a motor. The fan housing includes a frame, a base and a plurality of stationary blade sets. The base is disposed inside the frame. Each of the stationary blade sets includes a plurality of stationary blades disposed between the frame and the base. The motor is disposed onto the base to drive the impeller to rotate. At least one stationary blade of one stationary blade set has a different shape, dimension or inclined angle from that of at least one stationary blade of another stationary blade set.

1 . A fan housing comprising: 
 a frame;    a base disposed inside the frame; and    a plurality of stationary blade sets, each of which comprises a plurality of stationary blades disposed between the frame and the base;    wherein at least one stationary blade of one stationary blade set has a different shape, dimension or inclined angle from that of at least one stationary blade of another stationary blade set.    
   
   
       2 . The fan housing according to  claim 1 , wherein the stationary blades of each stationary blade set are different from each other.  
   
   
       3 . The fan housing according to  claim 1 , wherein the intervals between the stationary blades of the stationary blade sets are not all the same.  
   
   
       4 . The fan housing according to  claim 1 , wherein each stationary blade set has the same number of the stationary blades.  
   
   
       5 . The fan housing according to  claim 1 , wherein the shapes, dimensions or inclined angles of other stationary blades of one stationary blade set are the same as those of other stationary blades of another stationary blade set.  
   
   
       6 . The fan housing according to  claim 1 , wherein the stationary blades of each stationary blade set have different chord lengths thereof.  
   
   
       7 . The fan housing according to  claim 6 , wherein the shortest chord length is less than or equal to 80% of the longest chord length.  
   
   
       8 . The fan housing according to  claim 1 , wherein the stationary blades of each stationary blade set has different inclined angles thereof.  
   
   
       9 . The fan housing according to  claim 8 , wherein the inclined angles range from −30 degrees to 30 degrees.  
   
   
       10 . The fan housing according to  claim 1 , wherein the stationary blades of each stationary blade set have different aerofoils thereof.  
   
   
       11 . The fan housing according to  claim 1 , wherein the stationary blades of each stationary blade set are all the same.  
   
   
       12 . The fan housing according to  claim 1 , wherein the stationary blades of one stationary blade set are arbitrarily or regularly arranged with the stationary blades of another stationary blade set.  
   
   
       13 . A fan comprising: 
 an impeller,    a fan housing comprising a frame, a base and a plurality of stationary blade sets, wherein the base is disposed inside the frame, and each of the stationary blade sets comprises a plurality of stationary blades disposed between the frame and the base; and    a motor disposed onto the base to drive the impeller to rotate;    wherein at least one stationary blade of one stationary blade set has a different shape, dimension or inclined angle from that of at least one stationary blade of another stationary blade set.    
   
   
       14 . The fan according to  claim 13 , wherein the stationary blades of one stationary blade set are arbitrarily or regularly arranged with the stationary blades of another stationary blade set.  
   
   
       15 . The fan according to  claim 13 , wherein the intervals between the stationary blades of the stationary blade sets are not all the same.  
   
   
       16 . The fan according to  claim 13 , wherein the chord lengths of the stationary blades of one stationary blade set are different from those of the stationary blades of another stationary blade set.  
   
   
       17 . The fan according to  claim 16 , wherein the shortest chord lengths are less than or equal to 80% of the longest chord lengths.  
   
   
       18 . The fan according to  claim 13 , wherein the inclined angles of the stationary blades of one stationary blade set are different from those of the stationary blades of another stationary blade set.  
   
   
       19 . The fan according to  claim 18 , wherein the inclined angles range from −30 degrees to 30 degrees.  
   
   
       20 . The fan according to  claim 13 , wherein the aerofoils of the stationary blade of one stationary blade set is different from those of the stationary blade of another stationary blade set.