The LED screen you just bought turned yellow and changed color after using it for half a year? Last month, my friend suffered this loss when he opened a gym - he spent 80,000 yuan to install the screen, and went on a black screen strike when the temperature was high in summer. Today I will talk about this easily overlooked heat dissipation issue, so that you can avoid being trapped after reading it.

1. What happens if the heat dissipation is not good?

To be honest, what LED screens are most afraid of is not the water inlet or the high temperature. Last year, I installed screens for the hot pot restaurant, and the temperature in the kitchen soared to 40℃, and the corners of the screen were deformed. High temperatures can cause three fatal injuries:

• ​​Lanzhu premature aging​: The life of lamp beads is reduced from 100,000 hours to 30,000 hours in 70℃ environment
• ​​Chromatic deviation​: The red lamp beads are less heat-resistant than blue, and the overall picture is blue at high temperatures
• ​​The power supply is dead​: The worst case I have ever seen, the power module burns and sticks to the back plate

For example, a model with poor heat dissipation in shopping malls and atriums has to change the lamp beads after two years, and a reasonable design can last for more than five years.

2. Competition of mainstream heat dissipation solutions

Don’t listen to sales’ “innovative heat dissipation black technology”. There are three serious ways on the market:

Focus on this​Air-cooled structure​, a good design can double the heat dissipation efficiency. I have seen a honeycomb air duct used in a certain stage equipment, with 6 silent fans and deflectors, and the temperature is 15℃ lower than that of ordinary structures.

3. What details are hidden in the heat dissipation structure?

Remember to turn over and look at the back when buying the screen! Last year, I helped Internet cafes select screens and found that some manufacturers save money and trouble:

• ​​Radiation fins​Don't buy those with a thickness of less than 1mm, as it will deform when you break it by hand
• ​​Ventilation holes​If there is no dustproof net installed, it will be turned into a vacuum cleaner in half a year
• ​​Sieve layout​It's messy, the hot air can't be discharged

A friend who was doing an exhibition taught me a trick: touch the screen frame after half an hour after turning on the computer, and there must be problems with the heat dissipation of temperature difference exceeding 10℃. The screens in their exhibition halls now require a border temperature of ≤35℃.

4. How to cooperate with heat dissipation in the installation environment?

Don't think that it's all done after you finish it! Why do there always be problems with the arc screen in the mall? Later it was discovered that it was the decoration team that blocked the air outlet. Note three key points:

1. ​Space reservation​: Leave at least 50cm of cooling space behind the screen
2. ​​Air circulation​: Don't install it in a closed glass window as an oven
3. ​Temperature monitoring​: Install an intelligent temperature control module, automatically adjust brightness over temperature

The smartest operation I have ever seen is that the auto 4S store installs an exhaust fan on the top of the screen, and the air conditioning outlet is 8℃ lower than that of the outdoors in summer.

5. How to do maintenance and maintenance effective?

Those who say "maintenance-free" are all fools! I've seen screens in milk tea shops, with oil dirt and moth corpses on the filters. The correct posture is:

• ​​Monthly cleaning​​: Use compressed air to blow the heat sink, cotton swab fan shaft
• ​Quarterly Testing​: Infrared thermometer checks the temperature distribution, and early warning should be taken if the temperature difference is large
• ​​Annual Insurance​​: Lubricate the fan bearings and replace the aged silicone pad

There is a hotel engineering department that has built a "body temperature file" for each screen. It was found that a certain area continued to heat up and changed the heat dissipation module two weeks in advance.

Now you should understand that the cooling system is the "life support system" of LED screens. Next time you choose a supplier, focus on their​Cooling laboratory photos——A manufacturer that does not even have wind tunnel testing equipment can produce a cooling solution that is reliable? Remember, the damage caused by high temperature to the screen is irreversible, and the saved heat dissipation cost will be doubled sooner or later. By the way, don’t believe in “full sealed heat dissipation”. Where is the laws of physics placed? Equipment with good heat dissipation must have scientific airflow channel design.

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