The efficiency of industrial cooling fan mainly depends on the following factors: the diameter and axial length of the cooling fan blade, the speed of the fan, the shape and angle of the fan blade, etc. Generally speaking, industrial cooling fans with fewer blades are easy to generate larger wind pressure, but the running noise is also large; The cooling fan with more blades is just the opposite.
The shapes of the cooling fan blades are sickle type, trapezoid type and AVC patented folding edge type. Relatively speaking, the sickle type fan blade is stable and quiet when running, but it can produce less wind pressure; Trapezoidal fan blades are easy to generate large wind pressure, but also have large noise. The folding flange type is the best design, which can generate large wind pressure while maintaining low noise, but is currently only used in AVC's own cooling fan products. At present, we see more sickle design.
Thin right angle fan blade is the earliest product, but it is still not outdated. The fans using the DC fan blades can only behave well in terms of noise, air pressure, air volume, life, etc., and are suitable for products with low heat generation.
The thick curved fan blade has the best heat dissipation capacity, because it generates large air pressure and sufficient air volume, which is also beneficial to the improvement of the cold and heat exchange speed. However, the thick curved fan blades will bring more noise, and the centrifugal force on the shaft center is large when rotating, and the wear is serious, which also has a certain impact on the service life. This kind of fan blade is often used on violent fans that provide greater air volume.
The curved blade is improved on the basis of thick curved blade. The DC fan uses more blades, so the air volume is basically guaranteed. In addition, because the weight of the leaf is light, its speed is high, the speed is uniform, and the noise is not large. However, the biggest disadvantage of thin curved blades is that the wind pressure is slightly lower
The well-designed industrial cooling fan blades can produce large output air volume and air pressure under low fan speed, and will not produce too much noise at the same time. In addition to the shape, the angle of blade inclination is also important, which should be designed according to the characteristics of the motor and the needs of the heat dissipation object. Otherwise, simply pursuing a large blade inclination may lead to a situation where the wind noise of the cooling fan is large and the wind is small.
