Oblique flow fan

Abstract

The invention belongs to the technical field of fans, in particular to a high-efficiency oblique flow fan. The oblique flow fan comprises fan blades, an air guide cover, directional air guide blades and a housing, wherein the fan blades and the directional air guide blades are connected through a central bearing, the bearing fixed at the center of the conical fan blades passes through a reserved hole in the center of the directional air guide blades and is fixed, the air guide cover is directly stuck at the corresponding position on the housing through the action of a clamping point, and the directional air guide blades and the housing are fixed through screws. The oblique flow fan of the invention reduces sudden change and turbulence of air flow to the greatest extent, doubles the air pressure and energy efficiency of the fan, and effectively reduces noise.

What is claimed is: 
     
         1 . An oblique flow fan, wherein it comprises fan blades, an air guide cover, directional air guide blades and a housing, wherein the fan blades and the directional air guide blades are connected through a central bearing, the bearing fixed at the center of the conical fan blades passes through a reserved hole in the center of the directional air guide blades and is fixed, the air guide cover is directly stuck at the corresponding position on the housing through the action of a clamping point, and the directional air guide blades and the housing are fixed through screws. 
     
     
         2 . The oblique flow fan according to  claim 1 , wherein the fan blades is conical. 
     
     
         3 . The oblique flow fan according to  claim 1 , wherein the conical blades has a taper A of 50°-60°. 
     
     
         4 . The oblique flow fan according to  claim 1 , wherein the inclination angle range between the conical fan blade and the axial direction is greater than B1 and less than B2, wherein the inclination angle B1 is 45° and the Inclination angle B2 is 65°. 
     
     
         5 . The oblique flow fan according to  claim 4 , wherein the number of conical blades is odd. 
     
     
         6 . The oblique flow fan according to  claim 1 , wherein the air guide cover has a bell mouth cone, the air guide cover is close to the fan blades, and the air guide cover taper D is 6°-8° smaller than that of the fan blades. 
     
     
         7 . The oblique flow fan according to  claim 1 , wherein the inclination angle E between the tangent line of the initial arc section of the air guide blade and the axial direction is about 45°. 
     
     
         8 . The oblique flow fan according to  claim 7 , wherein the number of the directional guide blades is even, which is only one more than the number of the fan blade. 
     
     
         9 . The oblique flow fan according to  claim 1 , wherein the housing is cylindrical.