How should domestic fan products be classified at present

1. Fans can be classified into several types according to the materials used, such as iron casing fans (ordinary fans), glass fiber reinforced plastic fans, plastic fans, aluminum fans, stainless steel fans, etc.

2. Fan classification can be divided into centrifugal, axial flow, diagonal flow (mixed flow) and cross flow according to the direction of gas flow.

3. Fans are classified into axial fans, centrifugal fans and diagonal (mixed flow) fans according to the flow direction of the airflow into the impeller.

4. Fans are divided into press-in local fans (hereinafter referred to as press-in fans) and flameproof motors placed outside or in the flow channel according to their uses, and the flameproof motors are placed in the explosion-proof sealed cavity. Fan).

5. The fan can also be divided into single-stage, double-stage or multi-stage pressurized fans according to the pressurized form. For example, 4-72 is a single-stage pressurization, while a Roots blower is a multi-stage pressurization fan

6. Fans can be divided into: axial flow fans, mixed flow fans, roots fans, roof fans, air conditioning fans, etc.

7.The fan can be divided into low pressure fan, medium pressure fan and high pressure fan according to pressure.

Fan performance parameters

The performance parameters of the fan mainly include flow, pressure, power, efficiency and speed. In addition, the magnitude of noise and vibration is also the main fan design index. Flow rate is also called air volume, expressed by the volume of gas flowing through the fan per unit time; pressure is also called wind pressure, which refers to the increase in pressure of the gas in the fan, divided into static pressure, dynamic pressure and total pressure; power refers to the fan The input power is the shaft power. The ratio of the effective power of the fan to the shaft power is called efficiency. The full pressure efficiency of the fan can reach 90%.