What Is The Difference Between Axial Flow Fans And Centrifugal Fans

There are significant differences between axial flow fans and centrifugal fans in multiple aspects:
Appearance shape: The appearance of axial fans is basically cylindrical, while the appearance of centrifugal fans is snail shaped.
Working principle: The axial flow fan drives the fan blades to rotate, causing the gas to move along the axial direction, thereby achieving the suction and discharge of gas. A centrifugal fan obtains centrifugal force by rotating the gas in the fan blades, throwing the gas outward to achieve ventilation and exchange.
Exhaust direction: The exhaust direction of the axial fan is straight along the axis, and the inlet and outlet of the fan are parallel to the same axis. The exhaust direction of the centrifugal fan is perpendicular to the direction of the air inlet, and can achieve 360 degree specified direction exhaust.
Installation difficulty: The installation of axial flow fans is relatively simple, usually hanging directly on the wall or connecting the air duct. The installation of centrifugal fans is quite complex. During installation, the bearing seat and base must be tightly connected, and the cutting surface on the base should be properly protected from rust or operation.
Air volume and air pressure: Axial fans have a higher air volume but lower air pressure, while centrifugal fans have higher air volume and air pressure. If there are many bends in the pipeline, the exhaust and supply distances are relatively long, and the pipeline resistance is high, centrifugal fans should be used.
Usage: For places that require large-scale ventilation and smoke exhaust, such as public places such as shopping malls, stations, or industrial production workshops, centrifugal fans are often used for ventilation and smoke exhaust. For some special occasions, such as tunnels, bridges, etc., axial fans are required for ventilation and exchange of air.
Motor connection method: The motor connection of the axial flow fan is generally inside the fan body, while the motor of the centrifugal fan is connected by the shaft and is generally placed outside the fan exhaust duct.
Noise and efficiency: Generally speaking, the noise of axial fans is lower than that of centrifugal fans, making them suitable for situations that require low noise. The efficiency of centrifugal fans is relatively high, suitable for situations that require high efficiency.
In summary, there are significant differences between axial flow fans and centrifugal fans in terms of appearance, working principle, exhaust direction, installation difficulty, air volume and pressure, usage situation, motor connection method, noise and efficiency. When choosing which type of fan to use, it is necessary to consider the actual situation and needs.