What is the difference between an axial flow fan and an axial flow fan?

An axial flow fan has a collector duct and a diffuser, while an axial flow fan is just a motor support and a fan outer ring.
An axial flow fan, the exhaust direction of an axial flow fan is straight along the direction of the axis. The air inlet and exhaust port of the fan are on a parallel axis line. The axial flow fan is mainly composed of a fan impeller and a casing. The structure is simple but the data requirements are particularly high. The motor connection of an axial flow fan is generally inside the body of the fan, while the motor of a centrifugal fan is connected by an axis and is generally placed outside the fan exhaust duct.
There are two types of axial flow fans: axial flow and radial flow, which are divided according to the direction of air flow when the fan is working. When an axial flow fan is working, the blades push the air to flow in the same direction as the axis, so it is called an axial flow fan.

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