Negative pressure fan is a kind of industrial equipment widely used in industrial and agricultural production, which can produce a negative pressure environment, thereby accelerating the air flow, and attracting, transferring and treating materials, exhaust gases and dust. The power control of the negative pressure fan is very important, which can not only play a positive role in energy saving and emission reduction, but also ensure the normal operation of the negative pressure fan and extend its life. The following will introduce the power control method of negative pressure fan from the aspects of fan selection, motor power and operating parameters.
A reasonable selection of negative pressure fan is the basis for achieving power control. The selection of the fan should be determined according to the actual working load and the operating parameters of the system. Generally speaking, the power of the negative pressure fan is related to its air volume, head, efficiency and other parameters, and the selection should match the actual demand as far as possible to improve energy efficiency.
In the selection, the following aspects need to be considered:
According to the application scenarios of negative pressure fans in industrial and agricultural production, the requirements of required air volume, head and negative pressure are determined.
Choose positive pressure fan or negative pressure fan, according to the actual application needs to choose the appropriate fan type;
Select the appropriate fan model and specification, according to the industrial and agricultural production of air flow, static pressure and efficiency and other performance parameters requirements, select the appropriate fan model;
Taking into account the reliability and economy of operation, the negative pressure fan with higher efficiency is selected.
Second, motor power control The motor power of the negative pressure fan is an important factor affecting its operating power. The power control of the motor mainly includes two aspects: choosing the right motor power and taking the right motor control mode.
Selection of appropriate motor power: The selection of motor power needs to be determined according to the working load of the negative pressure fan, the characteristics of the fan and the efficiency of the fan. In general, the choice of motor power is mainly based on power calculation, which takes into account the fan's air volume, head, efficiency and speed of the fan and other parameters to ensure the normal operation of the negative pressure fan and the maximum work efficiency.
To sum up, the power control of the negative pressure fan needs to be comprehensively considered from many aspects such as selection, motor power and operating parameters. Reasonable selection of fan models and specifications, selection of appropriate motor power and control mode, and by adjusting the fan speed, adjusting the fan intake and outlet, as well as controlling the operation time and cycle to achieve effective power control. This can not only improve the energy efficiency and operation efficiency of the negative pressure fan, but also ensure its normal operation and extend its service life.
