People in the industry know that air knives are mainly used in electronic semiconductors, food and medicine, wine and beverages, automobile industry, sewage treatment, pneumatic transportation, ultrasonic cleaning and other industries, but many people do not know how important the choice of air knives is. Because if the customer does not choose the right one, it will only cause the customer more and more losses. The following is the explanation for the selection of the air knife:

Knife models are complete, from spider hand air knives, ring air knives , aluminum alloy air knives , and Coanda air knives, all products have detailed specifications and parameters. Therefore, for the selection of these various air knives, customers only need Provide relevant technical parameters such as spider hand air knives, aluminum alloy air knives, annular air knives, and Coanda air knives to the engineers of the air knife manufacturers that the equipment needs to cooperate with . The equipment engineers have the technical ability to select air knives. As long as the technology The selection of air knife can be completed by matching the indicators.

According to the length of the product to be blown and the range of the required thrust, it is initially determined that a total of N groups of air knives will be arranged on the total length of the pipeline, with B stations in each group, and the thrust of each air knife is R. Meet the total thrust requirement of N×B×R≥BR, while taking into account the following restrictions:

1. When the air knives are juxtaposed, the lateral distance between their center lines should be greater than 2 times the diameter of the air knives.

2. When the air knives are arranged in series, the longitudinal spacing should be greater than 20 times the tunnel diameter.

3. The air knife can be used to calculate the required total thrust BR, where At: tunnel cross-sectional area (N2) △P: sum of various resistances (Pa)

4. The ratio of tunnel air inlet resistance to air outlet resistance.

5. Tunnel surface friction resistance, resistance generated by suspended air knife devices, brackets and road signs.

6. The resistance caused by the pressure difference between the tunnel entrance and exit due to differences in temperature, air pressure, and wind speed.

The air volume of an air knife is defined as: the product of the wind speed and the cross-section of the air duct. Since large air knives can accurately measure the air volume using the wind speed, the calculation of the air volume is also very simple. The air volume can be calculated directly by using the formula Q=VF. The number of air knives is determined based on the number of air changes of the selected equipment, and the total air volume required by the equipment is calculated to calculate the number of air knives. The choice of air knife model should be based on the actual model we produce, and try to choose the air knife model that suits the customer.