Heat dissipating fan

Abstract

A heat dissipating fan has a round disk. The bottom of the round disk has a receiving portion concave upwards for receiving a motor 14. A periphery of the round disk has a plurality of cambered extending blades which are arranged regularly. The plurality of blades extends along a cambered path. Each blade has a convex surface and a concave surface. Each convex surface has a protruding flow guide opposite to the concave surface of the blade; and at a connection of the flow guide and the blade has at least one cambered surface.

What is claimed is:  
     
         1 . A heat dissipating fan having a round disk, a bottom of the round disk having a receiving portion concave upwards; a periphery of the round disk having a plurality of cambered extending blades; the plurality of blades extending along a cambered path; each blade having a convex surface and a concave surface; each convex surface having a protruding flow guide opposite to the concave surface of the blade; and at a connection of the flow guide and the blade having at least one cambered surface.  
     
     
         2 . The heat dissipating fan as claimed in  claim 1 , wherein the round disk and the plurality of blades are installed in a casing, an top and a bottom of the casing having a wind inlet, respectively, and one lateral side of the casing has a wind outlet; an inner side of the wind inlet at the bottom of the casing has a retaining disk; a center of the round disk being installed with a motor; the motor having a rotary shaft extending upwards; and an upper end of the rotary shaft being combined to a center of the round disk.  
     
     
         3 . The heat dissipating fan as claimed in  claim 2 , wherein the receiving portion of the round disk receives the motor.  
     
     
         4 . The heat dissipating fan as claimed in  claim 1 , wherein an angle of 15 to 75 degrees is formed between each blade and a normal line L of a connection of the round disk.  
     
     
         5 . The heat dissipating fan as claimed in  claim 1 , wherein the flow guide is installed at the upper and lower sides of the blade.  
     
     
         6 . The heat dissipating fan as claimed in  claim 1 , wherein the flow guide is installed at a lower edge of the blade.  
     
     
         7 . The heat dissipating fan as claimed in  claim 1 , wherein the flow guide is installed at the blade near a lower edge or a top edge.