Patent ID: 9416793
Filing Date: 2016-08-16
CPC Classification: F04D

Claim Text:
1. A centrifugal fan, comprising: a casing including a upper cover and a lower cover; and a fan body disposed in the casing, wherein the fan body includes: wherein a cross section of the air exhaust portion vertical to the upper cover and the lower cover includes an upper contour line and a lower contour line, the upper contour line includes a upper close point relative to the upper cover, the lower contour line includes a lower close point relative to the lower cover, and the upper close point and the lower close point are aligned with the edge of the air inlet in an axial direction of the fan body; wherein among all elements of the centrifugal fan, in the axial direction, the upper cover is the element closest to the upper contour line in the centrifugal fan, and the lower cover is the element closest to the lower contour line in the centrifugal fan.