Motor and a centrifugal fan thereof

Abstract

A motor and a centrifugal fan thereof. The centrifugal fan of the invention has a centrifugal fan body, which has a plurality of main air ducts circumferentially surrounding the rotation axis of the centrifugal fan; an air duct ring, comprising a plurality of extended air ducts circumferentially surrounding the rotation axis of the centrifugal fan; the air duct ring is configured to be sleeved on the centrifugal fan body so that the extended air ducts and the main air ducts are connected one-to-one. This invention extends the airflow channels of the centrifugal fan, increases the outer linear speed of the centrifugal fan, expands the heat dissipation area for airflow, significantly improves heat dissipation efficiency, and allows for simple installation and replacement.

Dependencies are inferred from the claim text.