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LED display applications Fire Technical Analysis

添加时间:2013-7-6  录入:本站  来源:原创

In this industry of rapid growth, LED display technology security applications remaining short board, LED products and standardization was again put on the agenda. In particular, application of fire safety LED display technology is the focus, so today we look at what factors led will affect the display fire safety issues.
Fire screen display technology is good or bad and fireproof materials, cabinet process is closely related.
Fire raw materials mainly include the use of internal wire display, power supply, external structural fire protection materials and plastic kits these four aspects:
The first point: In most display applications, the screen display unit area, the greater the greater the power consumption of the energization of the wire has a higher stability requirements. Number of wire products, used in accordance with the requirements of national standard wire to be able to guarantee its security and stability, which requires three things: a conductive copper wire core of the carrier, core cross-sectional area values ​​of tolerance in the standard range, wrapped wire core rubber insulation and flame resistance up to standard, compared with a normal copper clad aluminum core, core cross-sectional area is too small, not enough insulation rubber grade wire, power performance is more stable, less prone to short-circuit condition;
The second point: UL approved power products also chose the best choice when similar products, the effective conversion rate to ensure power supply load security and stability in the external ambient temperature hot case, it can work;
The third point: the display of the material aspects of the external protective structures on the market display a higher level of fire protection products are mostly used fireproof aluminum composite panel, its excellent fire resistance, fire retardant is also very strong, core material Compound oxygen aging performance is also very strong, melting temperature 135 ℃, decomposition temperature ≥ 300 ℃, environmental performance, halogen, in line with SGS, flame retardant B-S1, d0, t0, reference standard UL94, GB/8624-2006. General outdoor display products of aluminum plate with high temperature, rain and cold impact of aging rapidly, making it more humid climate in the season segment, rain screen is easy to penetrate inside the body lead to a fire caused by short circuit electronic components;
The fourth point: the display is also an important part of fire prevention materials, that is, the plastic package, plastic package unit module is mainly the use of bottom shell mask material, the main use of raw materials with flame retardant function PC + fiberglass material, not only with resistance burning capabilities, better at low temperatures in the high and long-term use, no distortion, no brittle cracking, combined with better sealing glue to use, can effectively block the rainwater penetration into the external environment and thus cause a short circuit inside the fire .
In addition to raw materials will affect the internal fire effects, external configuration and design is also very important, but external configuration issues mainly related to fire heat dissipation in the LED display work will also configure the exhaust fan and air conditioning on the inside of the screen body thermal cooling , recommended every 8-10 square screen assembly 1P air conditioning to ensure the normal body temperature is kept constant, air conditioning or exhaust fan configuration is not in place will cause uneven heat treatment, easily lead to elevate the temperature inside the body and cause safety hazards screen. Meanwhile, many enterprises in the cabinet LED protection class test, but simply to simulate the external environment, water spray test, waterproof effect on durability and strength to be verified, so the resulting product in the display after a period of time, there seepage occurs, it is prone to fire or outdoor display short life of the important reasons. In response to a lightning storm, screen device also avoid lightning arrester assault and burned inside the body of the device screen indispensable tool, you can directly import the lightning ground, rather than be screen body impact.
Display above belong to internal reasons, of course we can not ignore the post-maintenance process caused by human factors, such as the follow-up maintenance work, the operator did not follow a strict process flow for the job (no matter module screws, wire Reverse polarity, such as conductive objects left behind after the job), easily lead to a house on fire.
Throughout the industry standard has not been established under the premise of national markets for LED products have also been developed fire prevention regulations related systems, companies within the industry can follow the relevant provisions to improve their performance, to avoid the next "accident "so as to enhance the industry's competitiveness in the international arena, the LED products to" made. "

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