Detailed explanation of outdoor LED electronic screen safety problems
Time:2018-12-04
Views:161
As a new type of outdoor advertising carrier, outdoor LED electronic display has become a new highlight of urban outdoor advertising and attracted much attention due to its superior visual sense characteristics.After 20 years of ups and downs in China‘s LED display industry, the quality of LED screens produced in China has been recognized by the global market.However, the potential safety problems of outdoor LED electronic screen, especially the application technology of LED screen fire safety is the focus.Look at what factors will affect the display of fire safety problem, from April 2, 2012 of the Hong Kong la hotel fire emergency, knocked a wake-up call for the LED industry: in the rapid development of the industry at the same time, the LED display application security technology remaining short board, LED products and standardization were again on the agenda.
Display screen fire technology is mainly good or bad and display screen fire raw materials, box technology has a great relationship.
Fireproof raw materials mainly include the internal use of the display screen wire, power supply, external protection structure fireproof materials and plastic kits in these four aspects:
The first point: in most screen applications, the larger the display area per unit area, the greater the power consumption, and the higher the requirements for the power stability of the wire rod.Many wire products, used to meet the requirements of national standard wire to ensure the safe stability, it requires three things: wire core line of copper conductive carrier, core area of tolerance values in the standard range, package line core rubber insulation and flame retardancy to reach standard, compared with general copper clad aluminum wire core, wire core smaller cross-sectional area, insulation rubber grade wire rod, electric performance is more stable, not easy to short circuit happens;
Second point: UL certified power supply products are also the best choice when choosing similar products. Their effective conversion rate can ensure the safety and stability of power supply load, and they can work normally in the hot external environment.
The third point: in the material aspect of the outer protective structure display, high fire rating display on the market are mostly adopt fire prevention aluminum-plastic plate, its excellent fire resistance, fire retardant sex is extremely strong, core material is special oxygen aging resistance is strong, melting point temperature 135 ℃, the decomposition temperature of 300 ℃ or higher, environmental performance, low smoke zero halogen, in line with the SGS, flame retardant B - S1, d0, t0, reference use UL94 standard, GB / 8624-2006.General outdoor display screen products with high temperature, rain cold and hot impact aging faster, so that it is in a relatively humid climate season, rain and dew easy to infiltrate the screen internal lead to short circuit of electronic components caused by fire;
Fourth: display of fire prevention materials and an important part, it is plastic package, plastic package is mainly the unit module mask pan the use of materials, the main use of raw material is glass fiber material, which has the function of flame retardant PC with flame retardant function not only, more can when under high and low temperature, and long-term use, not deformation, not brittle cracking, combined with good sealing glue used at the same time, can effectively block the external environment of rainwater in internal that cause a short circuit fire.
In addition to the raw material can affect the fire prevention effect of internal and external configuration and design also is very important, but the external configuration mainly involve the fireproof problem of heat dissipation, at the same time in the display screen work will configure fan on the screen body internal heat cooling and air conditioning, suggested that every 8-10 square 1 p air conditioning assembly, maintain normal temperature screen body temperature, and air conditioning or fan configuration does not reach the designated position will cause uneven cooling treatment, easy to cause the screen caused by temperature ascend body internal security hidden danger.At the same time, many LED companies in the enclosure protection grade test, simply to simulate the spray in the external environment of waterproof test, waterproof effect on the durability and strength to research, so cause the display products use after a period of time will have water seepage happens, this is outdoor display easy to fire or short service life of the important reasons.In response to thunderstorm weather, the screen body device arrester is also to avoid lightning and burn out the screen body internal components of the necessary tools, can be directly introduced to the ground lightning, and will not have an impact on the screen body.
Above all belong to display the internal reason, of course, we also cannot ignore after-sales service in the process of man-made factors, such as in the follow-up maintenance work, the operator does not operate according to the strict process flow for homework (module screws have no matter, wire polarity reverse and homework legacy conductive objects, etc.), easy to cause fire.
Similarly, in the lighting industry, the main cause of fire is also due to the installation position is not standard or improper use of materials, etc., the main measure to prevent lighting fire is to strictly control the distance between combustible materials, standard installation and good heat insulation protection.
The Hong Kong hotel display the exact cause of a fire incident has yet to be research, but also not to Hong Kong for this incident of the LED display application hold negative attitude, while the industry standard has not been established, but the industry is doing better LED enterprises still have a lot, such as shenzhen chau Ming technology display products has won the British BS476 test center of construction material flame retardant fire test, the international certification standard is the LED display products in the industry leader, we should be keeping up with the leading model of enterprise, with high quality, YanGuiGe to ask myself,Guide the healthy development of the industry, so as to enhance the competitiveness of the whole industry in the international arena, and go international.
With the rapid development of modern science and technology, the LED display industry continues to high-speed growth, industry scale, new technology constantly, the guarantee of product quality to promote the brand to create a company and its long-term development, the enterprise must pay attention to product quality to survive, rather than the pursuit of profit maximization.
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