Axial flow fan and air conditioner

Abstract

An axial flow fan and an air conditioner including the axial flow fan, where the axial flow fan includes a plurality of blades. The blades include corrugated parts on ends thereof. The corrugated parts include at least one of convex portions or the concave portions.

What is claimed is: 
     
         1 . An axial flow fan comprising:
 a hub; and   a plurality of blades extending radially from an outer surface of the hub,   wherein corrugated parts are disposed on at least a portion of an edge of the blades, and   the corrugated parts comprise at least one of convex portions or concave portions.   
     
     
         2 . The axial flow fan according to  claim 1 , wherein the corrugated parts comprise a plurality of convex portions. 
     
     
         3 . The axial flow fan according to  claim 1 , wherein the corrugated parts comprise a plurality of concave portions. 
     
     
         4 . The axial flow fan according to  claim 1 , wherein the convex portions and the concave portions are alternatively arranged. 
     
     
         5 . The axial flow fan according to  claim 1 , wherein the corrugated parts are disposed on trailing edges of the blades. 
     
     
         6 . The axial flow fan according to  claim 4 , wherein the size of the convex portions and the size of the concave portions are greater toward trailing edges of the blades than toward a center of the blades. 
     
     
         7 . The axial flow fan according to  claim 4 , wherein the convex portions and the concave portions extend from trailing edges toward leading edges of the blades by predetermined lengths. 
     
     
         8 . The axial flow fan according to  claim 4 , wherein a cross section of the corrugated parts is a plurality of S-shapes. 
     
     
         9 . An air conditioner comprising:
 a heat exchanger disposed in a case;   a compressor disposed in the case; and   an axial flow fan disposed in the case and comprising a plurality of blades,   wherein corrugated parts are disposed on at least portions of trailing edges of the blades and   the corrugated parts comprise at least one of convex portions or concave portions.   
     
     
         10 . The air conditioner according to  claim 9 , further comprising a barrier plate to separate a region in which the compressor is disposed from a region in which the axial flow fan and the heat exchanger are disposed. 
     
     
         11 . The air conditioner according to  claim 9 , wherein the convex portions and the concave portions are alternately arranged along the trailing edges of the blades. 
     
     
         12 . The air conditioner according to  claim 11 , wherein the size of the convex portions and the size of the concave portions are greater toward the trailing edges of the blades than toward a center of the blades. 
     
     
         13 . The air conditioner according to  claim 11 , wherein the convex portions and the concave portions extend from the trailing edges toward leading edges of the blades by predetermined lengths. 
     
     
         14 . The air conditioner according to  claim 11 , wherein a cross section of the corrugated parts is a plurality of S-shapes. 
     
     
         15 . The air conditioner according to  claim 9 , further comprises a shroud disposed in the case to guide air discharged from the axial flow fan, wherein a shroud corrugated part is disposed at a discharge end of the shroud, and the shroud corrugated part comprises at least one of convex portions or concave portions. 
     
     
         16 . The air conditioner according to  claim 15 , wherein the shroud corrugated part comprises the convex portions and the concave portions that are alternately arranged. 
     
     
         17 . An air conditioner comprising:
 a heat exchanger disposed in a case;   a compressor disposed in the case;   an axial flow fan disposed in the case and comprises a plurality of blades; and   a shroud disposed in the case to guide air discharged from the axial flow fan,   wherein a shroud corrugated part is disposed on a discharge end of the shroud, and   the shroud corrugated part comprises at least one of shroud convex portions or shroud concave portions.   
     
     
         18 . The air conditioner according to  claim 18 , wherein the shroud corrugate part comprises the convex portions and the concave portions that are alternately arranged. 
     
     
         19 . The air conditioner according to  claim 17 , wherein the shroud convex portions and the shroud concave portions extend from the discharge end of the shroud toward an entrance end of the shroud by predetermined lengths. 
     
     
         20 . The air conditioner according to  claim 18 , wherein the size of the shroud convex portions and the size of the shroud concave portions are greater toward the discharge end of the shroud than toward the entrance end of the shroud.