Axial blower and series-type axial blower

An axial blower comprising:

• a housing including a wind tunnel;
• an impeller that is disposed in the wind tunnel and includes a plurality of blades;
• and a motor that includes a rotation shaft and is secured to the housing, the impeller being secured to the rotation shaft, wherein
• when an angle between a chord of the blade at a cross-sectional surface of the blade cut by a virtual cylindrical surface centering the rotation shaft, and a surface perpendicular to the rotation shaft is defined as a mounting angle, the blade includes an intermediate part between an inside diameter side part and an outside diameter side part of the blade, and this intermediate part has a mounting angle equal to or larger than a mounting angle of the inside diameter side part, and larger than a mounting angle of the outside diameter side part,
• the blade includes a rear edge having a cutout shape, and the intermediate part includes a portion where a length of the chord is from 80% to 72% of a length of the chord of the outside diameter side part;
• the blade further includes a front edge having a cutout shape, and when viewed in a direction parallel with an axial direction of the rotation shaft the cutout shape of the rear edge is concave toward a rotation direction of the impeller and the cutout shape of the front edge is concave toward a direction opposite to the rotation direction of the impeller.