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How to determine the actual air volume of a negative pressure fan
  • Shanghai Fan Manufacturer
  • Source: 5280tv.com
  • Views: 1,016 views
  • 如何判别负压风机的实际风量大小

    When we use a negative pressure fan, many times the actual air volume of the fan cannot be determined by perception. So how do we discern the actual air volume of the negative pressure fan? Today, the editor of the Shanghai fan manufacturer will discuss this issue with you.

    Negative pressure fan is a well-known type of fan. Its work mainly uses low energy consumption, environmental protection and energy saving to solve the problem of poor ventilation such as high temperature, sweltering, smoke, odor, dust in the workshop and the closed place. The negative pressure fan is a low pressure fan, but the air volume of the negative pressure fan is not a fixed size. There is a national standard that the national standard refers to the unified national regulations and can also be customized according to customer needs. So how to judge the actual air volume of the negative pressure fan you bought? Today, the Shanghai fan manufacturer-Huihong Fan Factory Xiaobian will give you a brief introduction on "how to determine the actual air volume of the negative pressure fan".

    1. The main material of FRP horn-shaped negative pressure fan is FRP, which has anti-pressure and anti-corrosion effects. Generally speaking, the shutters are opened and the horn mouth is out of air. The shutters mainly look at the opening of the two shutters below. The air from the bell mouth should be the same as the wind from each part, the center wind is the same as the edges, and the wind is evenly spread to the surroundings.

    2. The main material of the galvanized sheet square negative pressure fan is galvanized material, among which the shutters of the galvanized sheet square negative pressure fan are at the air outlet, which seriously increases the resistance of the air outlet. The air outlet does not spread to the surroundings, but instead Blown by the louver guide to the same direction. When a person stands in front of the air outlet and faces the fan, the air volume on the left side of the fan is significantly larger than that on the right side, which is caused by the design defects of the air duct and the blades. This application is relatively less widespread than FRP negative pressure fans.

    3. Combining the above two points, the air volume of the FRP horn-shaped negative pressure fan is much larger than that of the galvanized sheet square negative pressure fan, and the number of FRP negative pressure fans will be more.

    4. The air volume of FRP square negative pressure fan is the smallest. The opened glass fiber reinforced plastic square negative pressure fan is used to straighten the frame to the ground. It is more obvious when the wind is strong and the wind is smaller than the galvanized sheet square negative pressure fan. The wind will rotate in situ clockwise.

    5. The most practical measurement method is to see the effect of the fan in the ventilation project. The most scientific measurement method is to use an instrument to measure on the inlet side of the fan.

    At the same time, negative pressure fans are commonly known as wet curtain fans. Of course, there are some different places in the industry, such as fiberglass fans, galvanized sheet fans, etc. To determine the actual air volume of negative pressure fans, they should be based on the air outlet, wind direction, and instrument measurement. Results are standard.

    The above are the five methods for judging the air volume of negative pressure fans. They are all the rough opinions of the Shanghai fan manufacturer-Huihong Fan Factory. I hope that you can be satisfied. If there is something that is not in place, you can read it in the article. Leave a message below and we will take your suggestion and give you a reply.