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The function of axial fan and centrifugal fan in mechanical ventilation is described in detail.

Time: 2019-09-17 10:11 Browse times: Source: Shandong DUKAI Ventilating Equipment Co., Ltd.

When the axial fan is started, the current of the motor will be 5-6 times higher than the additional one. It will not only affect the service life of the motor, but also consume more power. When the system is designed, there will be some allowance in the selection of the motor. The speed of the motor is fixed, but in practice, it sometimes needs to run at a lower or higher speed. Therefore, it is necessary to carry out the frequency conversion modification.

 
 
The inverter can complete the soft starting of the motor, and achieve the purpose of energy saving and speed regulation by changing the frequency of the input voltage of the equipment, and it can also provide the maintenance function for the equipment such as overcurrent, overvoltage and overload. The role of axial fans and centrifugal fans in mechanical ventilation is due to the large difference between temperature and grain temperature. The first ventilation time should be selected in white days, so as to reduce the distance between grain temperature and Wen temperature and reduce the occurrence of condensation.
 
In the future, ventilation should be selected at night, because this ventilation is mainly based on cooling. In the evening, the relative humidity is relatively high and the temperature is low. This reduces water loss and makes full use of the low temperature at night to improve the cooling effect. With the centrifugal fan, it is possible to show windows and wall condensation, and even grain surface fines on the surface. It only needs to stop fans, open windows, open axial flow fans, turn over grain surfaces if necessary, and remove hot and humid air from warehouse.
 
With the axial flow fan, there will be no condensation phenomenon in the slow ventilation, only the upper middle grain temperature will slowly rise, and the grain temperature will decrease steadily as the ventilation continues. When the axial fan is used for slow ventilation, because the air volume of the axial fan is small, the other grain is a poor conductor of heat. The ventilation at the early stage of ventilation is simple, and the ventilation of a single part is slow. With the continuous ventilation, the grain temperature of the whole warehouse will be gradually balanced.

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