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Reasons for the noise of negative pressure fan and its solutions

The negative pressure fan is a machine that forcibly exhausts the stuffy indoor air to the outside, and any poor ventilation problems can be improved.
 
   The negative pressure fan can be used with a wet curtain. It can be installed outside the window of the workshop and can be used for ventilation, or as an exhaust fan. Generally, six units in a 1,000 square meter workshop can be used as a full house. In addition, negative pressure fans are used in a wide range, such as: high temperature or odorous workshops, labor-intensive enterprises, such as clothing factories; ventilation and cooling of greenhouses and livestock farms; or places where some specific minutes require ventilation and cooling. Such as: cotton, wool, hemp and other textile mills.
 
  The scope of application of negative pressure fan
 
Although negative pressure fans have a wide range of uses, for these manufacturers who use negative pressure fans, many people must be confused by the noise of the negative pressure fans. In the following article, let us understand and solve the noise of the negative pressure fans. Causes and solutions.
 
  About noise
 
   1. When the negative pressure fan is installed, the contact with the window frame is too tight, so that the window frame resonance occurs when the negative pressure fan is running.
 
   Solution: appropriately reduce the stuffing between the window frame and the water and air conditioner, and use a softer material to stuff. If the bottom of the installation is not stable, the bottom plate should be padded, and the placement is stable and firm.
 
   2. The vibration damping pad or fixing screw of the negative pressure fan base is screwed too tightly, and the vibration absorbing effect is lost, and vibration sound will be produced during operation.
 
   Solution: Adjust the screw tightness of the vibration absorbing pad of the negative pressure fan base to make the base surface level.
 
  3. The power supply voltage is too low, and abnormal noise and vibration are produced when the negative pressure fan starts or runs.
 
   Solution: Control the power supply voltage within the rated voltage range. A voltage stabilizer or a power supply regulator can usually be used to stabilize the voltage.
 
   4. The fan blades of the negative pressure fan collide with the fan housing (cover).