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11-07

What are the technical indicators of Sanyo cooling fan? Now let's analyze it together.

What are the technical indicators of Sanyo cooling fan? Now let's analyze it together. 1. Air volume. Air volume refers to the total amount of air discharged or inhaled by the cooling fan per minute. If it is calculated in cubic feet, the air volume unit is CFM; If measured in cubic meters, it is CMM. The unit of air volume often used by Sanyo cooling fan is CFM (about 0.028 cubic meters per minute). The air volume is an important indicator to measure the cooling capacity of the cooling fan. Obviously, the larger the air volume is, the higher the cooling capacity of Sanyo cooling fan is. This is because the heat capacity ratio of air is certain. The larger the air volume is, that is, the more air there is in a unit time, the more heat it takes away. Of course, under the same air volume, the heat dissipation effect is related to the wind flow mode. 2. Wind pressure. Air pressure and air volume are two relative concepts. Generally speaking, in order to design a fan with large air volume, it is necessary to sacrifice some air pressure under the consideration of cost saving by the manufacturer. If the cooling fan can drive a large amount of air flow, but the air pressure is small, The wind cannot blow to the bottom of the radiator (this is why some fans have high speed and large volume, but the heat dissipation effect is poor. On the contrary, high wind pressure often means that the air volume is small. There is not enough cold air to exchange heat with the radiator, which will also cause poor heat dissipation effect. 3. Fan speed. Fan speed refers to the number of revolutions of fan blades per minute, in rpm. Fan speed is determined by the number of turns of coils in the motor, working voltage, number of fan blades, inclination, height, diameter and bearing system. The speed is not necessarily related to the fan quality. The fan speed can be measured by internal speed signal or external measurement. With the change of application and ambient temperature, fans with different speeds are sometimes required to meet the demand. Some manufacturers have specially designed cooling fans with adjustable fan speed, which can be divided into manual and automatic ones. Manual is mainly used to enable users to obtain low noise at low speed in winter and good heat dissipation at high speed in summer. Generally, self-adjusting radiators are equipped with temperature control sensors, which can automatically control the fan speed according to the current working temperature, When the temperature is high, the speed will be increased; when the temperature is low, the speed will be reduced to achieve a dynamic balance, so as to maintain a good combination between wind noise and heat dissipation effect. 4. Fan noise. In addition to the heat dissipation effect, the noise of Sanyo cooling fan is also a common concern. Fan noise is the noise generated by the fan when it is working. It is affected by many factors, and the unit is decibel (dB). When measuring the fan noise, it needs to be conducted in an anechoic room with the noise less than 17dB, one meter away from the fan, and aligned with the air inlet of the fan along the direction of the fan axis. The A-weighted method is used to measure the fan noise. The spectral characteristics of the fan noise are also very important, Therefore, it is also necessary to record the noise frequency distribution of the fan with a spectrometer. Generally, the fan noise should be as small as possible, and there should be no abnormal sound. The noise of Sanyo cooling fan is related to friction and airflow. The higher the speed of Sanyo cooling fan, the greater the air volume, and the greater the noise. The vibration of the fan itself is also a factor that cannot be ignored. Of course, the vibration of high-quality fans will be very small, but the first two are difficult to overcome. To solve this problem, we can try to use larger fans. When the air volume is the same, The working noise of large fans at low speed is smaller than that of small fans at high speed. Another factor that we tend to ignore is the fan orientation. When the fan rotates at high speed, the shaft and bearing will collide with each other, so it is also a major source of fan noise. Capital Technology Co., Limited is the chief agent of SANYO DENKI, one of the leading enterprises of the cooling fan industry. We are a factory who also have our own independent brand CAPITAL product series. The main products are cooling fan, DC/AC fan, radiator, filter, reactor etc. We can provide customer with the most professional and perfect technical support, welcome to contact me at anytime at rainlee@szcpt.com.
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