We often see the gray sky in the morning, which is actually covered by something called smog. It is estimated that many people still don't know what haze 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 the fog to make the sky change instantly. It's gray. In fact, fog is a non-toxic and harmless natural phenomenon, and the formation of haze is mainly the result of a large number of suspended particles in the air and meteorological conditions. Fog and haze are often accompanied, and haze occurs at the same time, and conditions such as water vapor, calm wind, temperature inversion, and condensation nucleus are indispensable.
The toxins in the haze not only seriously endanger people's health, but also have a great impact on the operation of outdoor LED displays. In fact, we can distinguish fog and haze into fog and haze, because the main hazards of the two to the display are not the same:
First one: The harm of fog to outdoor display screens
Mist is formed by condensation of water vapor in the air. That is to say, the humidity in the air is relatively high, which will cause the LED 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, and even short-circuit, which will cause malfunction.
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 equipment through the ventilation holes, which will accelerate the wear and even damage to the fans and other equipment, and the dust will also fall on the surface of the control device inside the display, which not only reduces the display The heat dissipation and insulation performance of the screen will also accelerate the aging of the screen and affect the normal service life.
では、どのようにしてディスプレイ画面が霞がかった天候でのテストに長期間耐えることができるのでしょうか。ユーザーとエンジニアは購入とメンテナンスにもっと注意を払う必要があります。
1. First of all, during the purchase process, the user must see whether the display screen reaches the dustproof level required by the use environment. In terms of dust prevention, the international standard is IP0X-IP6X, which is a design level to prevent foreign matter intrusion. If installed in northern areas where there are more sand, dust and haze, its front and back protection levels must reach IP65. That is to say, a completely dust-proof structure must be adopted, that is, it is airtight under the state of spraying water.
2. LEDディスプレイのPCBボードが、表面を3つの-プルーフペイントでコーティングするなど、-防食処理されているかどうかに注意してください。 電源と電源コードが高品質のアクセサリであるかどうか-。 腐食しやすいスクリーン本体の溶接箇所が整っているか確認してください。 防錆処理後-。
3. In the daily maintenance process, we must regularly remove dust to avoid damp weather, dust absorbing moisture in the air and causing short circuits, which may lead to mildew on PCB boards and electronic components.
