Impeller and fan

Abstract

An impeller applied to a fan is disclosed. The impeller includes a hub, a plurality of centrifugal blades and a plurality of axial blades. One end of each of the centrifugal blades is disposed around the circumference of the hub. The axial blades are respectively connected to the other end of a part of the centrifugal blades. A fan applying the impeller is also disclosed.

What is claimed is: 
     
         1 . An impeller applied to a fan, comprising:
 a hub;   a plurality of centrifugal blades, wherein one end of each of the centrifugal blades is disposed around circumference of the hub; and   a plurality of axial blades, wherein the other end of a part of the centrifugal blades is connected to the axial blades, respectively.   
     
     
         2 . The impeller according to  claim 1 , wherein the number of the axial blades is less than or equals to the number of the centrifugal blades. 
     
     
         3 . The impeller according to claim I, wherein each of the centrifugal blades and the connected axial blades are integrally formed. 
     
     
         4 . The impeller according to  claim 1 , wherein the hub, the centrifugal blades and the axial blades are integrally formed. 
     
     
         5 . The impeller according to  claim 1 , wherein the other end of the centrifugal blades is respectively connected to a connecting element. 
     
     
         6 . An impeller applied to a fan, comprising:
 a hub; and   a plurality of composite blades disposed around circumference of the hub, wherein each of the composite blades extends from the hub and includes a centrifugal part and an axial part in sequence.   
     
     
         7 . The impeller according to  claim 6 , wherein the impeller further includes:
 a plurality of centrifugal blades staggerly disposed with the composite blades.   
     
     
         8 . The impeller according to  claim 6 , wherein the hub and the composite blades are integrally formed. 
     
     
         9 . The impeller according to  claim 6 , wherein the impeller further includes:
 a connecting clement connected to the centrifugal part or a connecting part between the centrifugal part and the centrifugal part.   
     
     
         10 . A fan, comprising:
 an impeller comprising:
 a hub, 
 a plurality of centrifugal blades, wherein one end of each of the centrifugal blades is disposed around circumference of the hub, and 
 a plurality of axial blades, wherein the other end of a part of the centrifugal blades is connected to the axial blades, respectively; and 
   a motor;   wherein the impeller is driven by the motor.   
     
     
         11 . The fan according to  claim 10 , wherein the number of the axial blades is less than or equals to the number of the centrifugal blades. 
     
     
         12 . The fan according to  claim 10 , wherein each of the centrifugal blades and the connected axial blades are integrally formed. 
     
     
         13 . The fan according to  claim 10 , wherein the hub, the centrifugal blades and the axial blades are integrally formed. 
     
     
         14 . The fan according to  claim 10 , wherein the other end of the centrifugal blades is respectively connected to a connecting element. 
     
     
         15 . A fan, comprising:
 an impeller comprising:
 a hub, and 
 a plurality of composite blades disposed around circumference of the hub, wherein each of the composite blades extends from the hub and includes a centrifugal part and an axial part in sequence; and 
   a motor;   wherein the impeller is driven by the motor   
     
     
         16 . The fan according to  claim 15 , wherein the impeller further includes:
 a plurality of centrifugal blades staggerly disposed with the composite blades.   
     
     
         17 . The fan according to  claim 15 , wherein the hub and the composite blades are integrally formed. 
     
     
         18 . The fan according to  claim 15 , wherein the impeller further includes:
 a connecting element connected to the centrifugal part or a connecting part between the centrifugal part and the centrifugal part.