Propeller fan and air conditioner equipped with same

Abstract

A propeller fan includes a blade. The blade has a shape in which a peak outlet angle at a trailing edge thereof exists in an outer region of the blade that is located radially outer than the representative square mean radius position, and an another peak outlet angle at a trailing edge thereof exists in an inner region of the blade that is located radially inner than the representative square mean radius position.

1 . A propeller fan comprising a blade, wherein
 the blade has a shape in which a peak outlet angle at a trailing edge thereof exists in an outer region of the blade that is located radially outer than the representative square mean radius position, and an another peak outlet angle at a trailing edge thereof exists in an inner region of the blade that is located radially inner than the representative square mean radius position,   the inner region includes a pressure surface having a maximum radius of curvature greater than a maximum radius of curvature of a pressure surface of the outer region.   
     
     
         2 . (canceled) 
     
     
         3 . A propeller fan according to  claim 1 , wherein
 the pressure surface of the inner region and the pressure surface of the outer region each include a concave curve surface.   
     
     
         4 . A propeller fan according to  claim 1 , wherein
 the inner region and the outer region each have single concave curve surface and single peak outlet angle.   
     
     
         5 . A propeller fan according to  claim 1 , wherein
 the trailing edge of the blade has a recessed portion recessed toward a leading edge of the blade in a region including the representative square mean radius position.   
     
     
         6 . An air conditioner comprising a propeller fan according to  claim 1 .