Industry application and classification of industrial cooling fans

It should be noted that we are not discussing industrial fans for manufactured products (such as cooling and ventilation equipment for tall spaces such as industrial plants, logistics storage, waiting rooms, exhibition halls, stadiums, supermarkets, highways, tunnels, etc.) , And it belongs to the application heat dissipation component of industrial component products-industrial cooling fan.

Industrial components, then it means that such products will not be sold directly to consumers, and they are heat dissipation application components or part of application components (because in addition to fan ventilation and heat dissipation, there are also heat sinks and liquid cooling heat dissipation. And other heat dissipation applications).

Industrial cooling fans can be used in a wide range of applications, ranging from aerospace equipment to electric toothbrushes. Such cooling components can be used.

Household appliances and office electrical equipment are industrial products with the largest demand for industrial fan cooling fan components, but they also have the highest requirements for large-scale product delivery capabilities. However, because such products are civilian-grade industrial manufactured products, the heat dissipation requirements of the products are not high. The product market is fully competitive. Since such products do not have high requirements for continuous working conditions, heat dissipation requirements, and heat dissipation requirements of the product working environment, there is not too much presentation in the product category of the vertical network portal of the industrial fan network.

The categories of industrial cooling fan components listed in the Industrial Fan Network are mainly used in many industries such as ventilation, refrigeration, heating, automobiles, drive technology, electronic power, UPS power supply, LED lighting, mechanical equipment, communication equipment, medical equipment, instrumentation, etc. , Is an important part of the heat dissipation and cooling components of its industrial finished products.

Industrial cooling components-cooling fan product selection is critical to the stability of product operation, such as product speed, air volume, static pressure, noise, moisture and dust resistance, waterproof rating, bearing materials, industry-specific certification parameters, Both are important references for the selection of cooling fans for industrial products.

Industrial cooling fans are classified according to the direction of airflow, and can be divided into 6 categories: axial flow, mixed flow, centrifugal flow, cross flow (cross flow), blower, and bracket (frameless) fans. Their technical characteristics are as follows:

Axial fan

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Its characteristics: high flow rate, medium wind pressure

The blades of an axial fan push air to flow in the same direction as the shaft. The impeller of an axial fan is similar to the propeller. When it works, most of the airflow is parallel to the shaft, in other words along the axis. When the inlet airflow is free air with zero static pressure, the axial flow fan has the lowest power consumption. When operating, the power consumption will increase as the airflow back pressure rises. Axial fans are usually installed in the cabinet of electrical equipment, and sometimes integrated on the motor. Because the axial fan has a compact structure, it can save a lot of space, and it is easy to install and widely used.

Centrifugal fan

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Its characteristics: limited flow rate, high wind pressure

Centrifugal fans, also called centrifugal fans, when working, the blades push air to flow in a direction perpendicular to the shaft (ie radial), the air intake is along the axis direction, and the air outlet is perpendicular to the axis direction. In most cases, the cooling effect can be achieved by using an axial fan. However, sometimes if the airflow needs to be rotated by 90 degrees or when a larger wind pressure is required, a centrifugal fan must be used. Strictly speaking, fans are also centrifugal fans.

Blower

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Features: small air flow changes, high volumetric efficiency, long service life, and good quietness

The working principle of the blower is that the air compression process is usually carried out under the action of centrifugal force through several working impellers (or several stages). The blower has a high-speed rotating rotor. The blades on the rotor drive the air to move at high speed. The centrifugal force causes the air to flow in the involute-shaped casing along the involute to the fan outlet. The high-speed airflow has a certain wind pressure. Fresh air enters and supplements from the center of the casing. 

Cross flow fan

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Its characteristics: low flow rate, low wind pressure

Cross flow fan is also called cross flow fan, it can produce a large area of air flow, usually used to cool the large surface of the equipment. The inlet and outlet of this fan are perpendicular to the axis. The cross flow fan uses a relatively long barrel-shaped fan impeller to work. The diameter of the barrel-shaped fan blade is relatively large. Because of the large diameter, it can use a relatively low speed on the basis of ensuring the overall air circulation. , Reduce the noise caused by high-speed operation.

Bracket (frameless) fan

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Its characteristics: low wind pressure, low velocity, large area

The bracket fan is mainly used in the heat dissipation of the PCB circuit board. It can be used with the heat sink of the system circuit board to generate a large area of air flow. It is usually used to cool the large surface of the device for heat dissipation.

The air volume of the frameless fan is increased, and the fan position adopts a concave design to increase the air intake capacity. At the same time, the frameless fan has a better mute effect


Post time: Sep-24-2020