Centrifugal fans can be divided into forward-inclined c […]
Centrifugal fans can be divided into forward-inclined centrifugal fans and backward-inclined centrifugal fans. Different structures determine different performances and applications.
Composition and application of backward centrifugal fans Manufacturers:
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.
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.
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 several 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
The static pressure head used to overcome the resistance of the system, 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.
② 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.
The operating noise of the forward-inclined centrifugal fan is greater than that of the backward-inclined centrifugal fan.
Regardless of whether it is a forward or backward centrifugal fan, each has its own advantages and disadvantages and applications in corresponding scenarios. Hengli fans will be perfectly matched according to your actual use.