We often see a gray sky in the morning, but it is actually covered by something called smog. It is estimated that many people still do not know what smog is. Its main components are formed by a mixture of sulfur dioxide, nitrogen oxides and inhalable particulate matter. The first two are gaseous pollutants. They combine with fog to make the sky instantly change. It was gray. In fact, fog is a non-toxic and harmless natural phenomenon, and the formation of haze is mainly the result of the joint action of a large number of particles suspended in the air and meteorological conditions. Smog is often accompanied by conditions such as water vapor, calm wind, temperature inversion, and condensation nuclei.
The toxins in the smog not only seriously endanger people’s health, but also have a great impact on the operation of outdoor LED electronic displays. In fact, we can distinguish smog into fog and haze, because the main hazards of the two to the display are different:
The first one: the harm of fog to outdoor display screens.
Fog is formed by the condensation of water vapor in the air. That is to say, the humidity in the air is relatively high, which will cause the 100mm Flexible LED Mesh Screen display to be damp. Excessive humidity will cause the PCB board, power supply, power cord and other components of the display to be easily oxidized and corroded, or even short-circuited, resulting in failure.
The second: the harm of haze to outdoor display screens.
Haze is a collection of dust and various tiny particles suspended in the air, among which the dust particles suspended in the air are the core material of the haze. If under the influence of haze for a long time, all kinds of fine dust in the air will enter the device through the ventilation holes, which will accelerate the wear and tear of fans and other devices, and the dust will also fall on the surface of the internal control components of the display screen, which not only reduces the display The heat dissipation and insulation performance of the screen will also accelerate the aging of the display screen and affect the normal service life.
Then, how to make the display screen can withstand the test in the haze weather for a long time, which requires users and engineering companies to pay more attention when purchasing and maintaining:
1. First of all, during the purchasing process, users must check whether the display screen meets the dust-proof level required by the use environment. In terms of dust protection, the international standard is IP0X-IP6X, which is a design level to prevent the intrusion of foreign objects. If it is installed in the northern region with a lot of dust and haze, its front and back protection levels must reach IP65. That is to say, it must adopt a completely dustproof structure, that is, it is airtight under the state of spraying water.
2. Be sure to pay attention to whether the PCB board of the led display has been treated with anti-corrosion, such as coating the surface with three anti-paints, etc.; whether the power supply and power cord are selected from high-quality accessories; Anti-rust treatment has been done.
3. In the process of daily maintenance, it is necessary to remove dust regularly to avoid short circuit caused by dust absorbing moisture in the air in humid weather, which leads to mildew of PCB board and electronic components.
