First, outdoor LED display high temperature heat dissipation protection measures in summer:
1. If the area of the display screen is within 25 square meters, it is generally not necessary to use the air conditioner. If economic conditions permit, two fans with a diameter of about 450mm can be used, which is determined according to the size of the installation space.
2. If it is a display screen with an area of more than 25 square meters, it is divided into the following 3 situations.
1) If the display installation position is against the wall and can protrude one meter from the wall, it is recommended to select the fan according to the area, and the fan installation position is arranged in sequence above the side of the screen. If you buy a P10 outdoor full-color LED display with a display of 70 square meters, it means that the fan you want to buy must be 5 axial fans with a diameter of about 500mm. The fan is the kind that draws air outside. And when installing the fan, make sure that there is a net inside to prevent technicians from sucking in clothes or other things when repairing the display screen and causing unpredictable damage. In order to be waterproof, it is necessary to install aluminum alloy shutters on the air outlet of the fan on the outside aluminum-plastic panel.
2) If the display screen is installed with a single column, it is best to use a fan to dissipate heat. The fan is installed on the top of the aluminum-plastic panel on the back of the large screen and made into blinds so that rain does not enter the display screen when it rains. Inside. If it is a dual-pillar display screen, several blinds can be opened in the middle of the dual-pillar. This Baiye window is the air inlet, and the fan above is the air outlet, so that complete air convection is formed and the heat dissipation effect is better.
3) If it is necessary to install an air conditioner, the purchase cost and use cost will increase, and the installation space and aesthetics of the external unit of the air conditioner must be considered, and the heat dissipation effect will be worse than that of the fan.
Second, 5 points of protection measures for outdoor LED display lightning protection in summer:
1. Protection against direct lightning strikes.
Install lightning rods on the supporting structure of the outdoor full-color LED display. For indoor displays or displays with tall buildings next to them, you don't need to consider installing lightning rods.
2. Counterattack against steel structures.
Connect the steel structure to the shell of the display screen, do the equipotentiality, and do the grounding. The grounding resistance is generally required to be less than 10 ohms. If the resistance does not meet the requirements, an additional artificial grounding network must be made. The lightning arrester should also be well grounded.
3. Aiming at the lightning current induced on the power line.
Install a single-phase or three-phase power surge protector on the power cord. The cross-sectional area of the connecting wire of the phase wire cannot be less than 10mm, and the cross-sectional area of the connecting ground wire should not be less than 15mm.
4. Aiming at the lightning current induced on the signal line.
Install a signal lightning protection device on the signal line. The signal arrester is determined according to the signal interface of the system. If it is a network cable, install a network signal arrester, and install a DB9 interface lightning arrester for the serial interface. The cross-sectional area of the ground wire cannot be less than 1.5mm.
5. Inductive current for lightning strikes.
Distribute professional distribution boxes and cabinets uniformly, which can more comprehensively and effectively protect the entire circuit system from the interference of lightning induced current.
Third, outdoor LED display water-proof measures in summer:
1. The main reason for the waterproofing of the display is prevention. Therefore, the module must be an outdoor waterproof module. The back of the module should be painted with three-proof paint. The cabinet should also be a waterproof cabinet with good airtightness. The other part needs to be implemented in the concrete construction site; in the structural design, waterproof and drainage are combined; after the structure is determined, according to the characteristics of the structure, it can be considered to have a hollow bubble tube structure, a small compression set rate, and an elongation at break. Sealing strip material with high rate and other performance; after selecting the sealing strip material, it is necessary to design a suitable contact surface and contact force according to the characteristics of the sealing strip material to make the sealing strip squeeze to a dense shape. In some installations, waterproof grooves, etc., do key protection to ensure that there is no accumulation of water inside the display. Only in this way can the display screen be used in the rainy season without any quality problems caused by human factors.
2. First of all, for different unit board materials, professional waterproof coatings are required. Secondly, see if there is a waterproof groove on the unit board kit. If there is, there is basically no major problem with the front waterproof, even if the unit board is fixed with magnets. Finally, we also need to pay attention to the waterproof problem of the backplane of the display, because in the process of using the display, the backplane display is not only a heat dissipation treatment, but also a great convenience in handling the waterproof performance. When dealing with the waterproof coating on the back, pay more attention to the waterproof performance of the small strip-shaped display aluminum-plastic panel on the back. It is necessary to use an electric drill to design a row of drains under the aluminum-plastic panel, which is conducive to the waterproof of the display and the heat dissipation of the display. The best display processing method.
