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Four differences between centrifugal fan and axial fan

Four differences between centrifugal fan and axial fan
 
With the continuous upgrading of industrial products and the rapid development of high-tech industries, centrifugal fans and axial fans have become more and more widely used for heat dissipation in industrial products. Many customers will ask that there is no difference between these two wind machines, and what are the characteristics of each. They often encounter such problems in selection and use. Today, the manufacturer of centrifugal fans——Ruiapple Electronics is here for these two types Do a detailed analysis of the difference between fans.

A. The difference in principle
1. The principle of centrifugal fan: the airflow flows into the rotating blade channel axially, and is thrown to the outer edge of the impeller under the action of centrifugal force, and is discharged from the air outlet.
2. Principle of axial flow fan: The gas enters the rotating blade channel axially and is pressurized and then discharges axially from the other side.
 
B, the difference in structure
1. The centrifugal fan is generally composed of impeller, casing, capacitor starter, motor and transmission parts (such as main shaft, pulley, bearing, V-belt, etc.). The impeller consists of a disk, blades (the number of blades is generally 8-16), a wheel cover, and a shaft disk. The casing is composed of a volute plate, side plates and legs. Centrifugal fans can adopt forward or backward leaning blades, which can meet the requirements of air volume and pressure more widely. Moreover, the cabinet can be muffled, which has obvious advantages in noise indicators. The motor and the fan are generally connected by a shaft.
2. Axial fans are generally composed of fan blades, housings and motors. Fan blades are divided into metal fan blades or plastic fan blades, and the housing has two types: metal shell and plastic shell. The blade diameter of an axial fan is limited to the diameter of the shell, and the motor is generally inside the fan. Axial fans with metal blades generally have an outer rotor structure with high speed, large inertia, high and low temperature resistance, moisture resistance and long-term operation in harsh environments with heavy dust. The plastic leaf has an inner rotor structure, which generally works in an indoor environment.
 
C. The difference between air volume and wind pressure
1. Centrifugal fans have high pressure coefficient and relatively low flow coefficient. According to the pressure, they are divided into high pressure (15000～3000Pa), medium pressure (3000～1000Pa), and low pressure (<1000Pa).
2. The axial flow fan has the characteristics of low pressure and large flow. According to the pressure, it is divided into high pressure (500～5000Pa) and low pressure (<500Pa). Low pressure is mainly used for ventilation and heat dissipation in general places.
 
D, the installation difficulty is different
Centrifugal fans are often installed at the inlet and outlet of air conditioning units, boiler drums, induced draft fans, etc., and the installation is more complicated. Axial fans are often installed in cabinets, various automatic control equipment for ventilation and heat dissipation, air exchange and circulation, air ducts or the front and end of air ducts.
 
Shenzhen Ruiapple Electronics Co., Ltd. was established in 2000. For 20 years, it has focused on R&D, manufacturing, and sales of DC AXIAL FAN, AC AXIAL FAN, CENTRIFUGAL FAN, and blower ( BLOWER), AC to DC fan (EC FAN), DC motor (DC MOTOR), AC to DC (EC MOTOR) motor and other full series of heat dissipation and ventilation products as an integrity enterprise.
 
Shenzhen Ruiapple Electronics Co., Ltd. has its own brand "RUIAPPLE", which is registered as a patent trademark by the government.
 
The company passed the ISO9001-2015 system certification in the early years. The series of cooling fan products have obtained UL, CUL, CE, CCC, ROHS and other international certifications.