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What are the causes of fan noise?
Nov 17 , 2021
The following analysis of the causes of fan noise: Fan discrete noise (rotating noise): It is related to the rotation of the impeller. In particular, the noise of high flow exhaust fan is particularly prominent under the condition of high speed and low load. Discrete noise is caused by the interaction between the asymmetric structure around the blade and the circumferential uneven flow field forme...
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How to reduction the noise of fan in design?
Nov 17 , 2021
The specific noise reduction methods of the fan are as follows: (1) Enhance the aerodynamic load of the cascade and reduce the circumferential speed For the axial cooling fan, strong forward blades are used, and the multi blade impeller is beneficial to increase the aerodynamic load of the cascade. Under the same air volume and pressure, the circumferential speed on the outer circle of the impelle...
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Design Principle of Air Purifier Cooling Fan
Nov 22 , 2021
With the development of society, people's requirements for air quality are getting higher and higher, and the air purifier industry has also developed, and the cooling fan that is a good partner of air purifiers has also developed. Air purifier is a common electrical appliance in people's homes, which is frequently used and easily worn out. In order to prolong the service life of the purifier, a c...
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What is the EC fan?
Nov 29 , 2021
The voltage used in electronic products is divided into direct current (DC) and alternating current (AC). Our usual household appliances, such as electric lights, air conditioners, refrigerators, etc., are AC power supply, while we use DC power supply with batteries (such as mobile phones, flashlights, clocks, etc.). In principle, the efficiency of DC cooling fan is higher than that of AC cooling ...
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Characteristics and advantages of EC cooling fan
Nov 29 , 2021
The more commonly used brushless cooling fans are divided into EC, DC, AC, etc. Among them, EC fans are DC fans, and EC cooling fans convert AC to DC. In addition to DC voltage power supply, AC voltage can also be used for power supply. The voltages of 12V, 24V, 48V, 110V, 220V, 380V are universal, without conversion. 1. The EC fan breaks the frequency limitation of the traditional AC fan, and can...
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Principle, advantages and disadvantages of cross flow fan
Dec 15 , 2021
Cross flow fan was first proposed by French engineer Mortier in 1892. The impeller is multi blade, long cylindrical and has forward multi wing blades. When the impeller rotates, the air flow enters the cascade from the open part of the impeller, passes through the interior of the impeller, and is discharged into the volute from the cascade on the other side to form the working air flow. The flow o...
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What are DC Centrifugal Fans?
Dec 21 , 2021
Centrifugal fans are sometimes called radial fans or centrifugal blower fans. They have a motor-driven hub which contains an impeller that discharges air into the housing and then directed to an outlet. The centrifugal fan exhausts air at an angle of 90 degrees (perpendicular to the air inlet). Centrifugal type fans mainly pressurize the air in the blower housing. Compared with axial fans, they pr...
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Axial Fans VS. Centrifugal Fans – What’s the Difference?
Dec 21 , 2021
Applications: Axial cooling fan, which can effectively move a large volumes of air, is usually used to cool small and large spaces. They can cool electronic equipment or computer rooms. They can be used for field cooling of HVAC operations, air conditioning condensers, heat exchange units or industrial systems. Axial flow fan can also be used as exhaust fan. Centrifugal cooling fans, considering t...
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