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How to solve the noise problem of cooling fan

Time：2022-03-16Views：0

In my opinion, the cooling fan is actually a fan that can achieve the cooling effect. What is the principle of the cooling fan? We can understand one or two literally! But there may be some problems with the organization of the language, so the following editor will tell you about the cooling principle of the cooling fan, its principle It is based on energy generation to achieve the purpose of heat dissipation.

With the change of application conditions and ambient temperature, different speed fans are sometimes required to meet the needs. Some manufacturers have specially designed cooling fans with adjustable fan speed, which are divided into manual and automatic. The main purpose of manual is to allow users to use low speed in winter to obtain low noise, and use high speed in summer to obtain good cooling effect. The automatic thermostat radiator generally has a temperature control sensor, which can automatically control the speed of the fan according to the current working temperature. If the temperature is high, the speed will be increased, and if the temperature is low, the speed will be reduced to achieve a dynamic balance and reduce wind noise. Maintain an optimal combination with the heat dissipation effect.

Fan speed refers to the number of times the fan blades rotate per minute, and the unit is rpm. The fan speed is determined by the number of turns of the coil in the motor, the working voltage, the number of fan blades, the inclination angle, the height, the diameter and the bearing system. There is no necessary connection between speed and fan quality. The rotational speed of the fan can be measured by the internal rotational speed signal, or it can be measured externally.

In addition to the cooling effect, the working noise of the fan is also a common concern. Fan noise is the size of 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 noise of the fan, it needs to be carried out in an anechoic chamber with a noise of less than 17dB, one meter away from the fan, and aligned with the air inlet of the fan along the direction of the fan shaft, and the A-weighted method is used for measurement. The spectral characteristics of fan noise are also very important, so it is also necessary to use a spectrum analyzer to record the noise frequency distribution of the fan. Generally, the noise of the fan should be as small as possible, and there should be no abnormal sound.

What is the relationship between the speed, air volume and noise of the cooling fan? In fact, if we read the above information, we can probably understand this problem a little bit. Noise has always been one of the problems that everyone wants to solve in mechanical equipment. The noise of the cooling fan is also the same. There will be more fan-related information updates in the future. If necessary, please continue to pay attention.

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