In the electrical industry, with fans collectively referred to as fans, without a fan only for ventilation is called a filter cover or grille. The most common application is a fan with a filter cover, fan by the cooling fan and fan protection cover, cooling fan is used to the cabinet inside the air or outward discharge of hot air inside the cabinet, fan protection cover is used to protect the fan. The fan protector protects the fan. The fan protector is made up of a plastic grille and filtering cotton, which is used to filter dust and fine particles from the air.
Two, fan installation steps
1, determine the direction of fan installation:
First confirm that your cabinet is required to the inside into the wind, or the need to discharge the cabinet to the outside of the hot air, this step is crucial, this is often ignored by the customer, and even some customers do not know that the fan is also divided into "into the cabinet and to the cabinet exhaust" this step is critical, this is often overlooked by customers, and even some customers do not know that the fan is also divided into "the cabinet and to the cabinet exhaust" this step is critical. The two types of fans.
Generally speaking, we should keep the positive pressure inside the cabinet, so we should feed the air into the cabinet; the reason is that if the fan exhausts to the outside of the cabinet, it will lead to a negative pressure inside the cabinet, and the air outside will enter directly from the cabinet door slits and the top plate side panels, etc. These unfiltered air goes directly into the cabinet, and after a long time, it will lead to the accumulation of dust inside the cabinet.
Warm tips: cabinet installation fan positive pressure than the negative pressure is better, that is, to the cabinet into the wind than to the cabinet outside the wind to be good. The reason is to the cabinet into the wind through the filter cotton filtration, so you can filter out the dust of the air, thus avoiding the cabinet of electronic and electrical equipment dust and lead to failure. (The specific need for which fan also need to be based on their own products to determine)
2, clear fan opening position:
In order to ensure that the air inside the cabinet can be convection, the first thing we need to consider is the installation of the cabinet fan into the mouth and out of the air outlet of a reasonable location.
Warm tips:
a Only when the temperature inside the cabinet is higher than the ambient temperature, the use of fans is effective. Because hot air is less dense than cold air, the airflow of the air inside the cabinet will be from the bottom to the top, so in general, in the front door of the cabinet or the side panels of the lower part of the cabinet as an air inlet, and the upper part of the cabinet as an exhaust port.
bWhen some equipment hotspots at the top, or the side and front door, resulting in the cabinet can not give the fan hole, this time it is necessary to open a hole in the top, the fan is installed in the direction of the direction of the cabinet to the outside of the exhaust, rather than to the cabinet air intake.
If the cabinet working environment is often dust, oil mist, water vapor and other factors affecting the normal work of the cabinet components, it should be in the air inlet to choose the fan filter, the outlet to choose the filter mesh cover, in order to prevent dust, oil mist, water vapor, etc. into the cabinet.