Into the summer, Shenzhen LED display industry gradually into the rhythm of production and sales booming, more and more outdoor surface stickers products used in a large number of airports, buildings, outdoor advertising columns and other places, and with the country across the summer to open the summer high temperature model , The harsh environment is also more and more test the outdoor LED display weather resistance.
However, in the face of the summer high temperature, rainy, multi-mine special environment, can not just rely on the LED display itself, excellent weather resistance, often in the construction and installation of the late maintenance of the omission is leading to LED display life shortages, The reasons for the failure, this article for lightning, high temperature cooling, waterproof finishing some of the experience to refer to your reference.
One, efficient cooling, cool summer
1,20 square within the LED display
Generally do not recommend the use of air conditioning, if the conditions permit, the use of two 300mm diameter fan can be, according to the size of the installation space to set.
2, more than 20 square LED display
1) If the LED display installation position against the wall, and can protrude a wall of the location of one meter, it is recommended to select the size of the fan according to the size of the fan installed in the top of the side of the screen in turn arranged. And when the installed fan to ensure that there is a network to prevent the maintenance of the display of the technical staff in the maintenance of the screen when the clothes or other things sucked into the cause of personal injury, in order to waterproof, to the outside of the aluminum plate on the fan outlet Fitted with aluminum alloy shutters. Wall-mounted LED display can also be installed air-conditioning, to ensure adequate space to place the air conditioning host and does not affect the overall appearance of the wall. The choice of air conditioning is required, the general use of 1.5P, 2P and 3P air conditioning up to. Northern cities with 20 square 1P air conditioning calculation; the southern city of 15 square 1P air conditioning calculation. If the LED outdoor display area is relatively large, air conditioning needs to be customized.
2) If the LED display is installed using the column, it is best to use the fan to heat, the fan installed in the back of the large-screen aluminum-plastic plate by the top, made of louver in order to rain when the rain does not enter the display. If it is a double column in the form of LED display, in the middle of the double column to open a few shutters, the doors of the window is the air intake, the above fan is the exhaust, so the formation of a complete air convection makes better heat dissipation.
Second, waterproof, the details are the key
Display waterproof mainly in the prevention, the choice of the module must be outdoor waterproof module, the module must be painted on the back of three anti-paint, the choice of the box is also the best waterproof box, the seal is better. And the other part needs to be implemented in the specific construction site; in the structural design of water and drainage combined; in the structure is determined, according to the characteristics of the structure, consider the hollow bubble tube structure, compression and permanent deformation rate is small, elongation And other properties of the sealing material; selected seal material, according to the characteristics of the sealing material, the design of the appropriate contact surface and contact force, so that the seal to the dense shape. In some of the installation of the location of the trench, do focus on protection and clear, to ensure that the display does not have any internal water. So as to ensure that the display rainy season when used, there will be no human factors caused by quality problems.
Three, five strokes to deal with lightning
1, the first to install the surge protector (SPD), when the electrical circuit or communication lines due to external interference suddenly produce spike current or voltage, the surge protector in a very short period of time conduction shunt, so as to avoid the surge Damage to other equipment in the circuit, the installation of the protector must be a separate ground.
2, for the steel structure of the lightning, the steel structure and LED display shell connected, and do a good job grounding, grounding resistance is generally less than 4 ohms, if the resistance does not meet the requirements, it is necessary to do additional artificial grounding network.
3, for the AC power line and low voltage DC power line induced lightning current, in the power line to install single-phase or three-phase power arrester and weak arrester. The cross-sectional area of the connecting line of the phase line can not be less than 10mm square, and the cross-sectional area of the connecting ground can not be less than 16mm square.