Electrical control cabinets are a common type of equipment used in electronic equipment to control the work of electrical equipment, which is widely used. However, electrical control cabinets generate a lot of heat during operation and hence, fans are an important facility for dissipating heat inside the control cabinet. When the control cabinet is in operation, the fan extracts air and removes air internally in order to remove heat from the control cabinet. When the temperature is found to be too high, the fan will also start automatically in order to dissipate the heat in time. In addition, the air volume and air pressure of the fan are set according to the actual demand of the electrical control cabinet, which can effectively improve the heat dissipation effect, guarantee the stable operation of the equipment and extend its service life. According to the type of fan, the fan can be divided into two types: blowing type and extracting type. The blowing type fan usually blows air out from inside the control cabinet to take away the heat, while the extracting type fan draws air in from outside the control cabinet to achieve the effect of heat dissipation. In addition, the fan inside the control cabinet will gradually deteriorate with the increase in service life, therefore, the fan needs to be replaced periodically to ensure the normal operation of the equipment.