| 摘要 |
A hub (71) of an axial-flow fan (70) has an outer perimeter cylinder (72) and a lid (73). The outer perimeter cylinder (72) is a portion having an opening (72a) in the axial center, a plurality of blades (91) being formed so as to project from the outer perimeter edge. The lid (73) is a portion extending from the outer perimeter cylinder (72) toward the boss (81) so as to cover the opening (72a) of the outer perimeter cylinder (72), and connecting the boss (81) and the outer perimeter cylinder (72) together. Reinforcing ribs (74, 75) for reinforcing the connection between the hub (71) and the boss (81) are integrally resin-molded together with the hub (71) and the boss (81) on both axial-direction sides of the lid (73). |
