Delta Electronics, Inc.

Cheng-Yuan Lee

Chao-Fu Yang

Wen-Chun Hsu

Kuo-Tung Hsu

Shuo-Sheng Hsu

Min-Sen Hung

A centrifugal fan includes a housing and an impeller. A top side of the housing has a main air inlet. A bottom side of the housing has a holder, a board, and plural supporting ribs connecting the holder and the board. The holder, the board, and the supporting ribs define a first secondary air inlet and a second secondary air inlet. In the extending direction of the central axis of the impeller, the impeller projects an upper projection to the top side, and projects a lower projection to the bottom side. The size of the upper projection is greater than the size of the main air inlet. At least one portion of the outer edge of the first secondary air inlet, the outer edge of the lower projection and the central axis are arranged in sequence.

Centrifugal fan

A fan structure includes a fan impeller, a motor and a fan frame. The motor has a rotating shaft connected to the fan impeller. The fan frame encloses the motor and the fan impeller to form a flow passage. The fan frame has a bottom wall and a side wall. The side wall includes a first relatively hard portion and a first relatively soft portion that is exposed in the flow passage.

Growing community of inventors

Taoyuan, Taiwan

Cheng-Yuan Lee