| 主权项 |
1. A centrifugal fan in which a rotation shaft is attached to a mounting section to rotate in a predetermined direction so that air taken in from a front of a support section is blown out radially, the centrifugal fan comprising:
the support section having a circular shape viewed from the front; a plurality of blades arranged in an annular shape along an outer circumference of the support section; and the mounting section provided at a center of the support section, wherein each of the blades includes: a primary wing section that has a trailing edge which is parallel to a central axis of rotation of the rotation shaft, a leading edge end section which is parallel to the central axis of rotation, and a thickness gradually growing thinner toward the trailing edge and the leading edge end section; and an auxiliary wing section that extends from the leading edge end section of the primary wing section toward the interior of the centrifugal fan, and wherein the auxiliary wing section has a length from the leading edge end section of the primary wing section to a leading edge of the auxiliary wing section that is greater at a side of the support section than at an intake side when viewed in a direction of the central axis of rotation, and wherein the auxiliary wing section has a constant thickness across the entire area of the auxiliary wing section. |
