Performance of industrial cooling fans

Performance of cooling fan u003cbru003e u003cbru003e u003cbru003e 1. Speed: u003cbru003e u003cbru003e u003cbru003e Rotation speed refers to the rotation speed of the fan, usually measured by the number of revolutions in 1 minute, namely: rpm. The speed is related to the number of turns of the electromechanical winding, the diameter of the wire, the outer diameter and bottom diameter of the fan blade impeller, the shape of the blade and the bearing used. The increase in the speed increases the air volume correspondingly. u003cbru003e u003cbru003e u003cbru003e The size of the speed value represents the size of the air volume to a certain extent. Under certain conditions, the higher the speed, the greater the noise and vibration. Therefore, when the air volume meets the heat dissipation requirements, it should be used as much as possible Low-speed fan. u003cbru003e u003cbru003e u003cbru003e The fan speed can pass the BIOS test when starting the car, or by the monitoring software that comes with the motherboard; it can also be tested by the speed tester. Note: The first two methods must be a fan with FG speed measurement function to be measured. u003cbru003e u003cbru003e u003cbru003e 2. Air volume and pressure: u003cbru003e u003cbru003e u003cbru003e There are two test methods for air volume and wind pressure, one is to use a wind tunnel tester, and the other is to use a double-box method. But for the average user, there is no such device. The data provided by the manufacturer can only be used as a reference, and ultimately depends on the cooling effect. u003cbru003e u003cbru003e u003cbru003e Air volume: u003cbru003e u003cbru003e u003cbru003e Air volume refers to the product of the plane speed of the fan's ventilation area. The ventilation area is the exit area minus the projected area at the vortex tongue. The plane velocity is the velocity of the gas moving through the entire plane, and the unit is m3/s. When the plane speed is constant, the larger the outer diameter of the fan blade impeller, the larger the ventilation area, and the larger the air volume. The plane speed is determined by the rotor speed and wind pressure. When the ventilation area is constant, the greater the plane speed, the greater the air volume. The greater the air volume, the greater the heat absorbed by the air, and the more heat can be taken away when the air moves, and the heat dissipation effect is more obvious u003cbru003e u003cbru003e u003cbru003e Wind pressure: u003cbru003e u003cbru003e u003cbru003e In order to carry out normal ventilation, it is necessary to overcome the resistance of the fan in the ventilation stroke. The fan must generate pressure to overcome the air supply resistance. The measured pressure change is called static pressure, which is the difference between the maximum static pressure and the atmospheric pressure. It is the pressure that the gas exerts on the surface parallel to the object, and the static pressure is measured through holes perpendicular to the surface. Converting the kinetic energy required in gas flow into pressure is called dynamic pressure. u003cbru003e u003cbru003e u003cbru003e The main performance parameters of the cooling fan: u003cbru003e u003cbru003e u003cbru003e The main parameters of the cooling fan include air volume, air pressure, speed, power, etc... u003cbru003e u003cbru003e u003cbru003e Thank you for your reading. Tongchi Auto is specialized in cooling fans, specializing in the research and development of miniature cooling fans, DC fans, centrifugal fans, blower cooling fan manufacturers, has its own R u0026 D team and the agent of Japan SanAce Yamayo cooling fans, JAMICON Kai American cooling fan, Taiwan AVC fan, welcome to consult, thank you!