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Axial fans are very versatile, that is, the airflow in the same direction as the axis of the blades, such as electric fans and external fans of air conditioners are fans that operate in axial flow. It is called "axial flow" because the gas flows parallel to the fan axis. Axial fans are usually used on occasions with higher flow requirements and lower pressure requirements. The axial fan fixes the position and moves the air. The axial flow fan is mainly composed of the fan impeller and the casing. The structure is simple but the data requirements are very high.
Among the air supply methods of industrial cooling fans, axial fans are the most widely used because of their comprehensive heat dissipation effect and low cost. The axial fans design generally adopts a downward blowing air supply method, and there is also a form of turning the direction of the axial flow fan into an upward suction form.
The difference between the two air supply methods lies in the different airflow forms. Turbulent flow is generated when blowing air, and the wind pressure is high, but it is susceptible to resistance loss; when the air is exhausted, laminar flow is generated, with low wind pressure but stable airflow. In theory, the heat transfer efficiency of turbulent flow is much greater than that of laminar flow, so it has become the mainstream design form of industrial cooling fans for industrial cooling fan manufacturers. But the movement of the airflow is also directly related to the heat sink. For example, in some heat sink designs, because the fins are too tight, the airflow is greatly obstructed by the heat sink. At this time, the air extraction method will have a better effect. Although there are many axial fan applications in industrial cooling fans, they also have inherent defects. The axial flow fan is blocked by the position of the motor, and the airflow cannot pass through the middle of the blowing area smoothly. This is called the "dead zone". On a typical heat sink, it is precisely the middle fin that has the highest temperature. Due to this contradiction, when an axial fan is used, the heat dissipation effect of the heat sink is insufficient.
An axial fan is a fan whose blades push air to flow in the same direction as the shaft when it is working. Generally speaking, large-scale axial fans are mainly suitable for the exhaust of dust, gravel ground, etc.; medium-sized axial fans are mainly suitable for indoor ventilation and heat exhaust, such as granaries; small axial fans are mainly suitable for Ventilation and heat dissipation of mechanical equipment, such as electrical cabinets. It has a simple structure, large air volume, is suitable for general application and has a wide range of uses.
