Introduce the working principle of axial flow fan and the difference from centrifugal fan

What is an axial fan?
There are many types of fans, exhaust axial fan is one of them, so what is an exhaust axial fan?
An exhaust axial fan, also known as an axial fan and local fan, is a fan in which the gas flows parallel to the axis of the fan. Industrial and mining enterprises often use this fan. Unlike ordinary fans, the motor and fan blades of the axial fan are All in a cylinder, the shape is simple shape, used for local ventilation, easy to install, the ventilation effect is obvious, safe, and can be connected to the air duct to send the air to the designated area.

Working principle of Exhausting axial fan
The working principle of the axial flow exhaust fan is that its blades push the air to flow in the same direction as the shaft. When working, most of the airflow is parallel to and along the axis. Its flow rate is large and the wind pressure is moderate, but the axial flow fan has a certain blind area, because the wind pressure of the traditional turbofan is not generated in the central part of the fan, but is generated by the rotation of the fan blades. Therefore, no matter how high its speed is, it will not blow any wind under the shaft, but it is the core of the heat under the fan shaft, and the heat is the main heat source. This situation will lead to the inherent defects of the axial exhaust fan, which will be blocked by the motor and airflow, and cannot reach the central part smoothly, resulting in blind spots. The existence of blind spots will cause the core temperature of the radiator to increase, thereby affecting the overall cooling effect. The air volume is very small, and the current will increase by 5-6 times when the fan is started, which will shorten the service life. At the same time, the power consumption is also large, but one skill is more powerful than the other. Typically, an inverter is used to control the startup.

Does Jason Fan Manufacturing talk about how axial fans are classified?
According to the characteristics of axial flow fans, the following classifications are made:
Classification by material: steel fan, glass fiber reinforced plastic fan, plastic fan, PP fan, PVC fan, magnesium alloy fan, aluminum fan, stainless steel fan, etc.
Classification by use: explosion-proof fan, anti-corrosion fan, explosion-proof anti-corrosion, special axial flow fan, and other types.
According to the requirements of use: pipeline type, wall type, post type, fixed type, rainproof and dustproof type, mobile type, motor external type, etc.
According to the installation method, it can be divided into belt drive type, and motor direct connection type.

What is the function of an axial flow fan?
Axial flow fans are usually used on occasions with high flow requirements and low-pressure requirements, so what is the use of axial flow fans?
If the shell of the axial flow fan is removed, it can also be used as a free fan; the axial flow fan also has another function, that is, it is installed in series in a long exhaust duct to increase the wind pressure in the duct.

Common Applications of Exhaust Axial Fans
Axial fans are mainly used for ventilation or to enhance heat dissipation, and are often used in metallurgy, the chemical industry, the light industry, food, medical equipment, mechanical equipment, and civil buildings.

What is the difference between an axial fan and a centrifugal fan?
(1) The exhaust direction is different
The exhaust direction of the axial flow fan is straight along the direction of the axis, the air inlet and exhaust port of the fan are on an axis parallel line, and the exhaust direction of the centrifugal fan is perpendicular to the direction of the air inlet, which can achieve 360 ​​degrees. Exhaust in the specified direction.
(2) Differences in air volume and air pressure
The air volume and air pressure of the axial flow fan are relatively small, and there is basically no wind pressure, while the air volume and air pressure of the centrifugal fan are relatively large. If there are many elbows in the pipeline, the air extraction distance and air supply distance are relatively long, and the pipeline resistance is large, it must Use a centrifugal fan.
(3) The difficulty of installation is different
The installation of the axial flow fan is relatively simple, generally, it is directly installed on the wall or connected to the air duct. Centrifugal fans are more complicated to install.
(4) The motor connection method of the fan is different
The motor connection of the axial fan is generally in the body of the fan, and the motor of the centrifugal fan is connected by the shaft, which is generally external to the fan exhaust duct.
(5) The appearance and shape are different: the appearance of the axial flow fan is basically cylindrical, and the appearance of the centrifugal fan is snail-shaped.

Summarize
Jason Fan Manufacturing focuses on the manufacturer of AC axial fans, air filter fans, centrifugal fans, exhaust axial fans, cabinet cooling fans, and air circulation fans. We provide high-performance and high-efficiency products according to the actual needs of users.