The classification of mixed flow fans, axial flow fans, and centrifugal fans is based on the movement of airflow in the fans.
Release time:
2021-08-12
Author: Jeff Zheng
Link: https://www.zhihu.com/question/30718266/answer/62559261
Source: Zhihu
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1. Centrifugal Fan
The airflow enters the rotating blade channel, where the gas is compressed and flows radially under the action of centrifugal force.
2. Axial Fan
The airflow enters the fan impeller axially and flows along the axis direction in the flow channel of the rotating blades.
Compared to centrifugal fans, axial fans have the characteristics of large flow, small size, and low head, and caution is needed when used in environments with dust and corrosive gases.
3. Mixed Flow (Diagonal Flow) Fan
In the impeller of the fan, the direction of airflow is between axial flow and is approximately conical, hence it can be called a mixed flow (diagonal flow) fan. This type of fan has a higher pressure coefficient than axial flow fans and a higher flow coefficient than centrifugal fans.
The above images are in order: centrifugal, mixed flow, axial.
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