After the winter, many provinces and cities in northern China suffered haze weather. Fog and haze on the health of the human body, we are very familiar with, but there are those elements in the haze, the LED display, which may be a lot of people do not know.
Composition of haze is more complex, including hundreds of chemical particles, mainly by chemical gas and dust, dust containing Ag (NO3) 2 (nitrate), Na2CO3 K2CO3 (carbonate), C (Hei Tan), SIO3 (Portland), Na2SO4 K2SO4 (sulfate), NH4HCO3 (An Yan) and heavy metals, metal containing Fe (iron), Ni (Ni), Pb (lead), Ca (CA), Na (NA) etc.. Organic part of chemical gas, such as nitrogen oxides, organic hydrocarbons, SO2 (sulfur dioxide), NO (nitric oxide), CLO2 (chlorine dioxide), H2S (Liu Huaqing), a variety of volatile VOC, etc..
These toxins are not only a serious harm to the health of people's health, but also caused a great impact on the operation of LED display. The main impact of the haze on the LED display has the following two aspects:
1, fog effect. Fog is the condensation of water vapor in the air. That is to say, the humidity is relatively large, will make the LED display is wet. Humidity over the general assembly caused by the PCB display LED panels, power, power lines and other components of the device is easy to be oxidized, and even a short circuit, and then a failure.
2, haze. Haze is a collection of dust in the air, suspended all kinds of tiny particles, the dust particles suspended in the air is the core substance of haze. In the long term effects of haze, a variety of fine dust in the air from the ventilation holes into the device, the fan and other equipment will accelerate the wear and damage, dust would fall in the internal surface of the device to control the screen, not only reduces the heat insulation performance and the LED display, can display the speed of aging, affecting the normal life.
In order to keep the LED screen in the fog and haze to prevent moisture, the need for owners and contractors in the purchase and maintenance of more attention.
In the procurement process, pay attention to the PCB board LED display is done anti corrosion, such as surface coating paint and other three; power supply and power line is the use of high-quality accessories; screen body welding is the most easily corroded place, do antirust processing.
In the process of daily maintenance, regular dust, wet weather to avoid dust absorption of moisture in the air, and then lead to mildew caused a short circuit board and an electronic component PCB. It is worth noting that the surface mount LED display not long-term use can lead to reliable performance, proposed in the haze days every day more than 1 hours, reduce the moisture erosion on the screen.
IP protection level features digital meaning
In the dust, to pay attention to the purchase of the LED display to achieve the use of the environment required by the dust level. The international standard for dust is IP0X-IP6X, which is a kind of design level to prevent foreign body invasion. If it is used in the northern areas of dust and haze weather, it must reach the six level of dust (complete dust structure). In the area of haze weather, LED display front and back protection level to reach IP65, which is the LED display using a completely dust structure, in the state of the water sealed.