the application and difference of forward and backward centrifugal fans

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The application and difference of forward and backward centrifugal fans

Release time: 01-12-2020

  Centrifugal fans can be divided into forward-inclined centrifugal fans and backward-inclined centrifugal fans. Different structures determine different performances and applications. Now let China Centrifugal Fan Supplier explain to everyone the application and difference of forward and backward centrifugal fans:

  Composition and Application of Forward Centrifugal Fan:

  This series of fans consists of an external rotor motor, a plastic or metal forward-curved impeller, and a plastic or metal volute. It has the characteristics of compact structure, small size, light weight, and easy installation and use.

  It is widely used in the forced ventilation of automatic control devices, electronic equipment and indoor pipeline dust removal, exhaust, heat exhaust, environmental protection, air purification and pollution control.

  Composition and application of backward centrifugal fan:

  The fan is composed of an asynchronous motor with an outer rotor and a plastic/aluminum impeller. The low temperature rise of the motor has the unique advantages of ventilation, heat dissipation and self-cooling. Thereby extending the reliability of the fan life. The fan is a backward curved impeller, which has the characteristics of compact structure, large air volume, high static pressure, low vibration, low noise, and convenient installation.

  Mainly used for purification workbenches, purification units, ventilation duct dust removal, purification of air conditioning systems, environmental protection and pollution control and other cooling equipment supporting work.

  The forward and backward centrifugal fans mainly refer to the difference between the blades of the assembled fan. The forward type is generally called a blower, and the backward type is generally called an induced draft fan. The difference is the length of the impeller crosspiece and the impeller edge.

  The forward tilt is parallel to the edge of the impeller, and the exit angle of the impeller is greater than 90 degrees. The forward tilt impeller is also called the forward tilt impeller. The forward tilt impeller is mostly high-pressure. The backward tilt and the impeller are not parallel, and the length is a few centimeters or a few millimeters from the edge of the impeller. It means that the exit angle of the impeller is less than 90 degrees. The backward tilt impeller is also called the backward tilt impeller.

  There are three main differences:

  1. Noise

  The operating noise of the forward-inclined centrifugal fan is greater than that of the backward-inclined centrifugal fan.

  2. Power

  The static pressure head used to overcome the system resistance, the forward-inclined centrifugal fan is smaller than the backward-inclined centrifugal fan. Since the channel in the backward inclined blade fan is gradually enlarged, its hydraulic loss is smaller than that of the forward inclined fan. Therefore, the efficiency of forward-inclined centrifugal fans is lower than that of backward-inclined centrifugal fans.

  3. Energy consumption

  Since the efficiency of forward-inclined centrifugal fans is lower than that of backward-inclined centrifugal fans, its power consumption is greater than that of backward-inclined centrifugal fans.

  Whether it is a forward or backward centrifugal fan, each has its own advantages and disadvantages and the application of the corresponding scene. Click to consult the online customer service, HAINING AFL Fan Factory will make a perfect match according to your actual use, and quickly select and quote!

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