Why do fans accumulate dust quickly after using them for a while?

The scorching sun has you constantly turning on the fan, only to realize it acts like a "dust magnet." Why does dust easily cling to fans and cooling devices like that?


During the hot summer, the demand for cooling devices such as electric fans and air conditioners increases. However, when using these devices, you may find that they are prone to dust accumulation on the fan blades, iron frames, and filters. In fact, the dust accumulation on these devices is much higher than on surfaces such as tables and cabinets…

Why do fans accumulate dust quickly after a period of use? - 1
Dust accumulation on fan blades and fan covers (Photo: Recommend).

According to experts, the reason for the dust accumulation on cooling devices is due to static electricity in the fan blades and other parts such as the air conditioner filters.

In an electric fan, the continuous rotation of the fan blades creates frictional force with the air, resulting in static electricity. At the same time, it creates a suction force on small and light objects in the air, such as dust, bacteria, and mold…

Because of this, after a period of use, dust and pollutants adhere to the devices.

In addition, airborne dust particles always carry an electric charge. When the cooling device operates, these particles also generate static electricity by friction with molecules in the air.

This removes electrons from the dust particles, causing them to have a negative charge and be attracted to the parts of the fan, especially the edges of the fan blades and the fan cover…

Why do fans accumulate dust quickly after a period of use? - 2
Dust accumulation on air conditioner filters (Photo: Recommend).

For air conditioners, a similar situation occurs, but the mechanism is slightly different from electric fans. The principle of operation of an air conditioner is to continuously draw air from the room, pass it through the heat exchange unit to cool it, and then blow it out through the filter.

During operation, pollutants including dust, bacteria, and mold that cause allergies adhere to the evaporator fan and are partially trapped in the filter. The remaining pollutants are blown back into the room.

If inhaled, these pollutants can cause respiratory diseases or other serious illnesses.

Source: Dân Trí

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