How does industrial fan noise develop?

The concept of natural ventilation and coolness combined with modern aviation wing technology, through the slow rotation of huge fan blades,

drives the omnidirectional airflow to produce a continuous, three-dimensional circulating wind.
The large-scale breeze flow accelerates the evaporation of sweat on the human body surface, resulting in natural cooling, just like when the

person feels the cool feeling of the sea breeze just after swimming out of the sea, the temperature difference on the human skin surface is 4-6

degrees Celsius. The characteristics of large-scale industrial fans, by changing the change in the wind speed, adjust the human body's feelings

while maintaining the body's moisture, thereby enhancing the human's feeling of comfort. Ruitaifeng independently developed and manufactured the

first domestic HVLS large air volume, low speed industrial large fan.China external rotor motor fan Manufacturers
A: System Impedance: The range between the air inlet and the air outlet of a cabinet accounts for 60% to 80% of the total system impedance. In

addition, the larger the airflow, the higher the noise. The higher the system impedance, the greater the airflow required for cooling, so to

minimize noise, the system impedance must be minimized.
B: Air disturbance: Noise caused by obstacles along the air flow path. Therefore, any obstacle, especially in the critical air inlet and outlet

area, must be avoided to reduce noise.
C: Fan speed and size: Because high-speed fans generate more noise than low-speed fans, you should try and select low-speed fans whenever

possible. A fan with a larger size and a lower speed is usually quieter than a fan with a small size and a high speed when delivering the same

amount of air.
E: Voltage fluctuation: The voltage fluctuation will affect the noise level. The higher the voltage applied to the fan, the higher the rotation

speed, the greater the vibration, and the greater the noise generated. The design considerations for each part of the fan will affect the noise

level. The following design considerations can achieve noise reduction: the size of the winding core, the design of the blades and the outer

frame, and the precise manufacture and balance.