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What kinds of centrifugal fans do we have?

Feb 13,2023
We have Backward curved centrifugal fan, Forwad curved centrifugal fan and duct What is the difference between forward and backward centrifugal fans? What is the difference between forward and backward centrifugal fans?

The blade of the fan assembled by the forward and backward centrifugal fans is different. The forward is called the blower, and the backward is called the induced draft fan. The difference is the length of the impeller transverse and the impeller edge.
 Forward inclination is parallel to the edge of the impeller, the impeller outlet Angle is greater than 90 degrees for forward inclination impeller,  also known as forward inclination impeller, forward inclination impeller with high pressure. After the inclination and the impeller is not parallel, the length to the edge of the impeller is a few centimeters or a few millimeters, refers to the impeller outlet Angle is less than 90 degrees for the inclination impeller, also known as the inclination impeller, the inclination impeller is mainly medium pressure. 

There Are Three Difference:

1 . Power:
 The hydraulic loss of the backward blade fan is smaller than that of the forward blade fan because of the gradual expansion of the groove. Therefore, the efficiency of forward centrifugal fan is lower than that of backward centrifugal wind

2 . Energy Consumption:
The efficiency of the forward centrifugal fan is lower than that of the backward centrifugal fan, its power consumption is greater than that of the backward centrifugal fan.

3 . Noise:
The operation noise of forward centrifugal fan is greater than that of backward centrifugal fan.

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