The key to the application of LED display fire protection technology is closely related to LED display fire protection raw materials and box technology. Fireproof raw materials include four layers: wires and power supplies used inside the LED display screen, fireproof materials and plastic kits of external safety protection structure;
1. In most LED display applications, the larger the display per unit area, the greater the power consumption, and the higher the requirements for conductor power on stability. In many wire products, only the wire that meets the requirements of national standards can ensure safety and reliability. There are three regulations: the wire core is a copper conductive carrier, the cross-sectional area tolerance of the wire core is within the standard range, and the insulation and flame retardant of the rubber covering the wire core meet the standard specifications, which is different from the ordinary copper-clad aluminum wire core. Conductors with small core cross-sectional area and insufficient insulation rubber grade have more stable live performance and are not easy to cause short circuit;
2. UL certified power products are the best choice for the same industry. Their reasonable conversion rate can ensure the safety and stability of power load and can work normally in the hot external environment.
3. As for the materials for the external safety protection structure of LED display screen, most of the display screen products with high fire resistance in the market are fireproof aluminum-plastic plates, which have excellent fire resistance, fire safety and flame retardancy. The special materials for core materials have strong oxygen aging performance, melting point temperature 135, decomposition temperature 300, environmental protection performance, UL94 halogen-free, in line with SGS, flame retardancy b-s1, d0, T0, The aluminum-plastic plate of ordinary outdoor display products ages rapidly under the impact of high temperature and rain. Under relatively humid climate conditions, rain and dew are easy to penetrate the screen, resulting in short circuit of electronic components and fire accidents.
4. The fireproof raw materials of LED display screen have a key part. If we talk about plastic kits, they are mainly used as raw materials for the bottom shell of unit module mask. The key application raw materials are PC glass fiber raw materials with flame retardant effect. They not only have flame retardant effect, but also will not deform or become brittle and easy to crack under high and low temperature and long-term application. They can be directly combined with glue with good sealing performance, Reasonably prevent the rainwater of the external environment from penetrating into the interior and causing short-circuit fire.
5. When there is no breakthrough in key raw materials such as lamp beads, increasing the current does not improve the brightness.
In addition, the internal raw materials will affect the actual effect of fire prevention. The external configuration is as key as the design, but the key of external configuration includes heat dissipation in fire prevention. When the display works, it will be equipped with exhaust fan and air conditioner to dissipate heat and heat inside the screen. It is recommended that every 8-10 air conditioners in the square assembly line 1p ensure that the temperature in the screen is kept at a normal constant temperature. If the air conditioner or exhaust fan is improperly configured and the heat dissipation distribution is uneven, it is easy to cause internal safety risks of the screen due to temperature rise. In addition, when testing the protection grade of the box, many LED display enterprises only simply simulate the test of spraying waterproof in environmental factors. The durability and strength of the actual waterproof effect need to be verified, resulting in water seepage of the display products after application for a period of time, which is also the key reason why the outdoor display screen is very easy to catch fire or has a short service life. When dealing with the thunderstorm temperature, the lightning arrester of the screen equipment is necessary. It is also a special tool to avoid lightning stroke and burning the internal components of the screen. At the same time, it will lead to lightning entering the road, which is not easy to cause damage to the screen.
6. Correct installation
Because the full-color LED display screen should be electronic components, and some of its main raw materials also belong to combustibles, it is necessary to fundamentally “prevent combustion”, and apply high-quality power supply, wire, IC, connector and other combustible electronic components to reduce the failure rate and adjust the fire probability of LED display screen; Technically, in the whole installation process of full-color LED display screen, professionals must do a good job in installation, guidance and inspection in order to prevent trouble; Close to the flammability of the LED display.
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