I was watching a short video and saw the scene of the large LED screen in the mall burning into a sea of ​​flames. I was so scared that I even spilled my milk tea! How come these display screens that are flashing blindly on the streets every day suddenly turn into "fire-breathing dragons"? Two days ago, a friend who runs a hotpot restaurant asked me: "The LED advertising screen just installed in front of my house won't spontaneously ignite in the middle of the night, right?" "Today I will take you through the dangerous factors hidden in LED screens.

1. They were the real culprits of the fire

Last summer, a charcoal-burning display screen in a shopping mall was found to be caused by the aging of the power cord. But you thought only wiring problems would cause trouble? Then underestimate these "arsonists":

• ​​Shanzhai power module​ ​: In order to save costs, some manufacturers use a false standard for the rated power of the power supply. It's like installing a motorcycle engine into a truck. Can it prevent it from burning?
• ​​Cooling system cut corners​ ​: The most outrageous thing I have ever seen is using plastic sheets as radiators. On a hot day, eggs can be fried on the back of the screen. It’s strange that the screen doesn’t burn.
• ​​Cracked waterproof tape​ ​: Rainwater seeped into the power box, and the sparks were flying, like setting off firecrackers. Last month, the screen at a concert was short-circuited. This was the reason.

2. These places are most likely to be infected

You might not believe it if you tell me.​ ​Ceiling screen in commercial plaza​ ​On the contrary, it is the hardest hit area. Why? In order to save money, many properties install screens that should be indoors outdoors. Exposure to the sun, rain and poor ventilation make it a perfect place for cultivating gu:

1. ​​Restaurant door screen​ ​: Due to the double attack of oil smoke and high temperature, the line insulation layer will become brittle in two years.
2. ​​Building curved screen​ ​: The heat dissipation space is sacrificed for the sake of styling, and the heat is completely trapped in the interlayer.
3. ​​Temporary stage rental screen​ ​: Repeated disassembly and assembly will cause the joints to loosen, and poor contact will cause sparks.

A friend who works in a nightclub complained to me that his stage floor tile screen started to smoke after only half a year of use. When I took it apart, I found that the cooling fan was filled with a thick layer of soot, covering the heating element like a quilt.

3. What does a fire screen look like?

A truly reliable LED screen and fire-proof design are all hidden in the details. Teach you three ways to identify with the naked eye:

• ​​Touch box material​ ​: The thermal conductivity of aviation-grade aluminum-magnesium alloy is 200 times that of plastic, and it is genuine if it feels cold to the touch.
• ​​Look at the wire identification​ ​: The outer skin of the flame retardant thread is printed with "FT2". If you burn it with a lighter, it will only become brittle and will not cause flames.
• ​​Check the heat dissipation structure​ ​: Those with shark fin heat sinks are better than light panels, and those with intelligent temperature control systems are more reliable.

An engineering company that makes smart street lights told me that the screen they chose has a built-in smoke alarm and will automatically cut off power when the temperature exceeds 70°C. Although this design is costly, it is much more cost-effective than fire losses.

4. A must-read life-saving guide for beginners

​​Q: How do you think the screen installed at home is unsafe? ​ ​
Check the power connector once a month. If the box does not feel hot when touched, it is deemed to have passed the test. If you notice a burnt smell around the screen, turn off the power immediately!

​​Q: Do I need to turn off the screen on rainy days? ​ ​
Real IP65-protected screens can withstand heavy rain, but the waterproof strips of knock-off screens will age out in two years. It is recommended to close it when it rains heavily. Safety comes first.

​​Q: What are the signs that the screen life has expired? ​ ​
The appearance of color blocks and partial flickering on the screen is an early warning. Don't make do with it. I've seen the most stubborn boss. He tried to hold on even though the screen was cracked. As a result, it started to smoke after three days.

To be honest, I used to wonder why some LED screens can last for ten years without breaking, while some brand-new screens burn at the drop of a hat. Later, I went to the scene several times with the quality inspection master before I understood——​ ​The difference between a good screen and a bad screen is all invisible.​ ​. Next time you see a manufacturer with a particularly low quotation, remember to ask more questions: "Does the fireproof design of your screen rely on praying to God?" "

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