With the rapid development of the full-color LED display industry, the standardization and standardization of LED products has been put on the agenda again. Especially the LED screen fire safety application technology is the focus. The fireproof technology of full-color LED display is mainly related to the fireproof raw materials and cabinet technology of the display screen. Fireproof raw materials mainly include the wires and power supply used inside the display screen, the fireproof materials for the external protective structure and the plastic kits:
Outdoor full color led display
The first point: In most screen applications, the larger the display unit area of the screen, the greater the power consumption, and the higher the requirements for the stability of the wire. Among many wire products, the use of wires that meet the requirements of the national standard can ensure their safety and stability. There are three requirements: the core is a copper wire conductive carrier, the cross-sectional area tolerance of the core is within the standard range, and the insulation of the rubber covering the core And the flame retardancy reaches the standard, compared with the general copper clad aluminum core, the core cross-sectional area is small, and the insulation rubber grade is not enough, the electrical performance is more stable, and the short circuit is not prone to occur.
The second point: UL-certified power products are also the best choice when choosing similar products, and their effective conversion rate can ensure the safety and stability of the power load, and can work normally under the hot external environment temperature;
The third point: In terms of materials for the external protective structure of the display screen, most of the display products with a higher fire rating on the market are made of fireproof aluminum-plastic panels, which have excellent fire resistance and strong fire and flame retardancy. The core material is dedicated to oxygen. The aging performance is also very strong, the melting point temperature is 135℃, the decomposition temperature is 300℃, environmental protection performance, low smoke and halogen free, in line with SGS, flame retardant B-S1, d0, t0, refer to the use standard UL94, GB/8624-2006. The aluminum-plastic panels of general outdoor display products age quickly with the impact of high temperature, rain, cold and heat, so that in relatively humid weather seasons, rain and dew will easily penetrate into the screen and cause short circuits of electronic components and cause fires;
The fourth point: There is another important part of the fireproof raw materials for LED full-color display screens, that is, the plastic kit. The plastic kit is mainly the material used for the bottom shell of the unit module mask. The main raw material used is PC+glass fiber material with flame retardant function. Not only has flame retardant function, but also can not deform or become brittle and crack under high and low temperature and long-term use. At the same time, it can be used with glue with good sealing performance to effectively prevent rainwater from the external environment from penetrating into the interior. A fire occurs due to a short circuit.
In addition to the internal raw materials that will affect the fire protection effect, the external configuration and design are also very important, but the external configuration mainly involves the heat dissipation in the fire protection problem. When the display screen is working, an exhaust fan and air conditioner will be configured to cool the inside of the screen. It is recommended to install a 1P air conditioner every 8-10 square meters to ensure that the temperature in the screen body is maintained at a normal constant temperature. Inadequate configuration of the air conditioner or exhaust fan will cause uneven heat dissipation, which may easily lead to hidden safety hazards inside the screen due to temperature rise.
Another special reminder: Many LED companies simply simulate the spray waterproof test in the external environment when testing the protection level of the cabinet. The durability and strength of the waterproof effect need to be verified, so the display products have been used for a period of time. Afterwards, there will be water seepage, which is an important reason why outdoor displays are prone to fire or have a short service life. When dealing with thunderstorms, the lightning arrester on the screen is also an indispensable tool to prevent the internal components of the screen from being damaged by lightning. It can directly lead the lightning to the ground without affecting the screen.
