With the rapid development of modern technology, LED lights display screen industry sustained rapid speed of growth, expanding industry, technology innovation, market share since 1993, continued to grow by an annual average growth rate of 40%, however, in 2012 Hong Kong Harbour Grand caught fire incident on April 2, knocked to the entire LED industry a wake-up call: the rapid growth of this industry, LED display screen safe application of technology to the remaining short board, LED products standardization and Standardization was again put on the agenda. In particular, LED display screen fire safety application techniques is the focus of today I would take you to see what factors will affect the display of fire safety issues.
Display fire prevention technology is good or bad is closely associated with display fire raw materials, cabinet craft.
The fire main raw materials, including the display of these four aspects of the use of the screen inside the wire, power supply, external protection, structural fire protection materials and plastic kit:
The first point: in most display applications, the unit area of the screen shows the greater the greater the power consumption, higher requirements on the power stability of the wire. Many wire products, in line with GB requirements of the wire to be able to guarantee its security and stability, requires three things: wire core copper conductive carrier, wire core cross-sectional area of tolerance in the value of the standard range, wrapped wire core rubber insulation up to standard and flame retardant, compared to the copper clad aluminum wire core wire core cross-sectional area is small enough level of insulation rubber wire, power performance is more stable, less prone to short-circuit condition;
Second point: UL approved power products also chose the best choice when similar products, the effective conversion rate power load to ensure security and stability in the external ambient temperature of the hot case, can also work;
The third point: display external protective structure material on the market, higher fire rating display products are mostly fire-resistant aluminum composite panel, its fire resistance and excellent fire retardant is also strong, the core material Special Material oxygen aging properties is also very strong, melting temperature 135 ° C, decomposition temperature ≥ 300 ° C, the environmental performance of halogen, in line with SGS, flame retardant B-S1, d0, t0, reference standard the UL94 GB/8624-2006. General outdoor display screen products of the aluminum plate with high temperature, rain and hot and cold impact aging rapidly, season segment in a more humid climate, make it rain easily penetrate inside the screen body leading to electronic components caused by short fire;
The fourth point: the curtain fire raw materials, there is an important part of that is plastic kit, plastic kit modules available for the use of the mask bottom shell materials, the main use of raw materials with a flame retardant PC + fiberglass materials, not only has the resistance burning function better at high temperature and long-term use, no distortion, does not become brittle and crack, combined with the tightness of good glue to use, can effectively block the external environment of the rain in through causing a short circuit within the fire .
In addition to the internal raw materials will affect the fire effect, external configuration and design also very important, but the external configuration is mainly involved to fire prevention, heat in the display screen work at the same time, configure the row of fans and air conditioners cooling the inside of the screen body cooling, recommended every 8-10 square assembly 1P air conditioning to ensure that screen the body temperature is kept constant temperature is not configured in place of air conditioning or exhaust fans can cause uneven heat treatment, easily lead to elevated temperature caused by the screen within the security risks. A lot of LED down lights companies during the cabinet level of protection test simply to simulate the spray water testing in the external environment, pending research on the persistence and strength of the waterproofing effect, with the result in the display products used for some time after there seepage occurred, this is the outdoor display is easy to fire or short service life of the important reasons. In response to a lightning storm, the Screen device arrester is to avoid the lightning assault and burned an essential tool of the screen within the device, the lightning to ground impact without Screen.
Above belong to the display of internal reasons, of course we can not ignore the later maintenance process caused by human factors, in the follow-up maintenance work, for example, the operator did not follow a strict process flow operation (module screws did not matter, wire reverse polarity, conductive objects left over after the operation, etc.), and easily lead to the house on fire.
The exact cause of the fire events of the Hong Kong hotel display there is to be investigated, but not incident on Hong Kong’s LED display product application to hold a negative attitude, while the entire industry standards has not been established, but the industry is doing better LED business or, for example, Chau Ming, Shenzhen City, display products have been the England Test Center BS476 building materials fire retardant test, display products to meet international certification standards within the LED industry leader, we should in line to lead exemplary corporate, high quality, strict specifications required, and guide the healthy development of the industry, thereby enhancing the competitiveness of the industry as a whole in the international arena and globalize.