Fan impeller structure

Abstract

A fan impeller structure includes a main body having a central annular section, a connection section and a flow guide section. The central annular section has a through hole. The connection section has multiple connection members. Two ends of the connection members are respectively connected with the central annular section and the flow guide section. The flow guide section has a carrier annular body. Multiple fan blades are disposed on at least one side of the carrier annular body. The fan impeller structure is able to enhance the strength of the fan blades and lower the noise of the fan.

What is claimed is: 
     
         1 . A fan impeller structure comprising a main body having a central annular section, a connection section and a flow guide section, the central annular section having a through hole, the connection section having multiple connection members, two ends of the connection members being respectively connected with the central annular section and the flow guide section, the flow guide section having a carrier annular body, multiple fan blades being disposed on at least one side of the carrier annular body. 
     
     
         2 . The fan impeller structure as claimed in  claim 1 , wherein the connection members are U-shaped. 
     
     
         3 . The fan impeller structure as claimed in  claim 1 , wherein the fan blades are arranged at equal intervals or unequal intervals. 
     
     
         4 . The fan impeller structure as claimed in  claim 1 , wherein a junction between the flow guide section and the connection section further has an annular rib. 
     
     
         5 . The fan impeller structure as claimed in  claim 1 , wherein at least one air inlet is defined between the connection members. 
     
     
         6 . The fan impeller structure as claimed in  claim 1 , further comprising a hub connected with the main body, the material of the hub being identical to or different from the material of the main body, the hub being integrally connected with the central annular section by means of injection molding. 
     
     
         7 . The fan impeller structure as claimed in  claim 1 , wherein the central annular section and one side of the flow guide section are radially horizontally arranged corresponding to each other.