Centrifugal fan

摘要

A centrifugal fan includes a housing, a driving device, and a fan impeller. The housing has a hollow chamber which has a central axis. The driving device is located at the central axis of the hollow chamber. The fan impeller is disposed in the hollow chamber and includes a hub, several blades, and several fins. The hub is connected with the driving device. The blades are disposed around the hub. Each blade has a windward surface and a leeward surface. Each fin extends from the windward surface of one of the blades, outward by an arc surface from the windward surface starting from a location near the central axis, and further extends to the leeward surface of an adjacent blade.

主权项

1. A centrifugal fan, comprising:
a housing having a hollow chamber, the hollow chamber having a central axis; a driving device located at the central axis of the hollow chamber; and a fan impeller disposed in the hollow chamber of the housing, comprising:
a hub connected with the driving device;a plurality of blades disposed around the hub, wherein each of the blades is directly connected to the hub, and each of the blades has a windward surface and a leeward surface; anda plurality of fins, each of the fins connecting the windward surface of one of the blades and the leeward surface of an adjacent one of the blades, and each of the blades being directly connected to two adjacent ones of the fins, wherein each of the fins is provided with an arc surface facing towards the hub, wherein one end of the arc surface is connected to the windward surface and is closer to the central axis than the other end of the arc surface which is connected to the leeward surface.