The use of fans is effective only when the temperature in the cabinet is higher than the ambient temperature. The fan is also quite economical and is especially suitable for discharging high heat loads.
Because hot air is lighter than cold air, the air flow in the cabinet should be from bottom to top. Therefore, under normal circumstances, the front door or side wall of the cabinet should be used as the air inlet and the upper side as the air outlet.
If the environment at the work site is better, there is no influence of dust, oil mist, water vapor, etc. The various components in the cabinet can work normally, and the air inlet can be equipped with an axial fan. The exhaust port can be equipped with a decorative panel, and the air inlet can be equipped with a fan decorative panel outside for safety and beauty.
If the environment of the work site is not good, it contains dust, oil mist, water vapor and other influences. The components in the electrical control cabinet will be affected by the environment outside the cabinet to work normally. Then you should choose a filter fan at the air inlet. Select a filter grid at the exhaust port to prevent dust, oil mist, water vapor, etc. from entering the electrical control cabinet.
Fan filter mat
Now we have a mature product supply, which is simple and convenient to install, and the filter mat can be easily replaced. Filter mats are generally divided into non-woven fiber filter mats and fine filter mats. The non-woven fiber filter mat is used to prevent dust particles above 10 microns, and the fine filter mat is used to prevent dust particles below 10 microns.
How to choose fan for cabinet cooling is very important. And it should be noted that when the filter fan is selected, the air inside and outside the cabinet is not isolated, and it is still possible to damage the components and affect the normal operation of the components due to the entry of dust, water vapor, and corrosive gases.
The selection of the filter fan can be selected in the fan’s characteristic curve table according to the difference between the temperature in the cabinet and the ambient temperature and the heat loss in the cabinet. Filter fans are currently the most common method used.