Delta Electronics, Inc.

Chung-We Yeh

Chih-Hua Lin

Yuan-Chuan Liu

A ventilation fan includes a fan and a housing. The fan includes a base, a scroll casing, and an impeller. The base is used for supporting a driving device. The scroll casing has an air inlet, an air outlet, a top portion, a bottom portion corresponding to the top portion, and a slope surface connecting the top portion and an edge of the air outlet. The top portion and the bottom portion together define a channel height, and the ratio of the channel height to the height of the air outlet ranges from 1.1 to 2. The channel height ranges from 110 mm to 200 mm. The impeller is disposed in the scroll casing, and the driving device drives the impeller to rotate. The housing is used for accommodating the fan, and has an opening corresponding to the air outlet of the scroll casing.

Growing community of inventors

Taoyuan, Taiwan

Chung-We Yeh