The boy touched the LED traffic light signal pole and was in danger. The two construction workers of the LED lighting renovation project were electrocuted and the electric shock caused by LED lighting products continued to appear in the newspapers. Since the US Consumer Product Safety Commission (CPSC) recalled about 99000 LED lighting products last year due to “the danger of electric shock caused by power-onâ€, this year the European Commission has produced one from China due to “may cause users to get an electric shockâ€. LED lights are withdrawn from the market. The potential power safety issues of LED lighting products have aroused widespread concern in all walks of life.
LED lamp electric shock hazard due to lax safety standards <br> <br> domestic largely promoted the development of the industry, but also to many blind pursuit of low-cost business advantage of the loophole.
Not long ago, in the list of unqualified products of the 2014 embedded lighting quality supervision and inspection published by the Shanghai Municipal Bureau of Quality and Technical Supervision, even the LED lamps of well-known brands such as NVC have also suffered from “serious quality problems†such as unqualified protection against electric shock. On the list.
So, what causes LED flashlights to have frequent electric shocks? “To put it bluntly, it is the production enterprise to save costs.†Zhang Wei, investment director of Junsheng Investment Management Co., Ltd., said in an interview with reporters that “the LED lamps on the market are mostly composed of PC plastic and aluminum, of which 1/3 1/2 is aluminum. In order to save cost, most domestic enterprises use non-isolated power supply, the high-voltage part is directly connected with the metal casing, and only the resin layer of the aluminum substrate is used as the insulating material, which naturally causes great safety hazard. ."
The reporter learned that because lighting fixtures are difficult to achieve 100% complete leakage in structural design, in Europe and the United States where safety regulations are more stringent, high-voltage tests of lamps above 2000V are required to ensure that leakage risks are controlled. Within a certain range. In order to be able to pass safety certification, manufacturers generally use isolated power supplies. For the domestic market with huge price pressure, the cost of the isolated power supply is 1-2 dollars higher than that of the non-isolated power supply, which accounts for almost half of the price of the finished lamp. Therefore, many domestic enterprises choose to use the low-end aluminum-plastic structure lamp. Non-isolated power supplies for cost savings. However, such products sold in the domestic market are difficult to pass the safety certification of European and American countries.
In addition, the current LED lamps use a large amount of organic materials, which generate harmful smoke when burned, and become a fatal safety hazard in the event of a fire. In contrast, in public places such as subways in developed countries, not only most of the wires need to be iron pipes, but also the non-combustible materials are used as much as possible to ensure the safety under extreme conditions.
"It is undeniable that the less stringent domestic safety standards have greatly promoted the development of the industry, but it has also led many companies that are pursuing low-cost to exploit the loopholes. There are standards that are designed according to minimum standards. It is free to play," Zhang said.
To solve the glass tube or glass tube Road <br> <br> highly insulating and thermally conductive itself, even if a non-isolated power supply, but also to ensure safety.
In addition to aluminum-plastic tubes, LED tubes also have a technical route for glass. The reporter learned from the lighting association that the traditional incandescent lamp manufacturer represented by Foshan Lighting has used some of the original glass equipment and processes to produce LED lighting products for glass tubes, while the emerging LED lighting companies represented by Mulinsen Mainly made of PC plastic tube.
Zhang Wei believes that glass bulbs have higher light transmittance than PC plastics, and it is easier to achieve high light efficiency, but it is also easy to cause glare and other discomfort; when it encounters fire, glass will not produce toxic gas like non-flame retardant PC plastic. But glass has a series of problems because it is fragile. "There are various benefits, the key depends on the application." Zhang Wei said.
In this regard, Zhao Ning, technical director of Dynamic Chemicals, told the reporter that in fact, compared with aluminum-plastic tubes, the biggest characteristic of glass tubes is their high safety, because they are highly insulated and heat-conducting, even when using non-isolated power supplies. ensure safety. At the same time, the glass tube is fireproof and will not be deformed at high temperatures.
According to Zhao Ning, after the unremitting efforts and innovation of domestic enterprises in the near future, the technical indicators of glass lamps have made great progress, and the advantages compared with the general pipes are more distinct. In addition to good safety, it can pass CE, UL and other certifications with low cost and effective technical solutions to facilitate product export. First, the transmittance of glass is higher than that of PC plastic, and the thermal stability is excellent, and the glass tube is excellent. 360 degrees are in contact with air, uniform heat dissipation; second, the glass tube will not turn yellow for a long time, more resistant to dirt, corrosion, and more durable; third, the cost of transparent glass tube is much lower than "semi-plastic semi-aluminum "The tube, even in order to prevent glare, plus the cost of the inner surface of the glass tube through the process of sanding, spraying or corrosion, the cost of the glass tube has a great advantage; fourth, compared to aluminum, PC plastic, glass products are more environmentally friendly. . The carbon emission in the overall production process of the glass tube is only about 1/2 of that of the aluminum-plastic tube, and the anodization of the aluminum has the problem of contamination of the wastewater. In this way, the glass tube is more in line with the green concept of LED; fifth, compared with the traditional fluorescent tube, the glass tube has great similarity, which is in line with the visual habits of most people.
LED lamp electric shock hazard due to lax safety standards <br> <br> domestic largely promoted the development of the industry, but also to many blind pursuit of low-cost business advantage of the loophole.
Not long ago, in the list of unqualified products of the 2014 embedded lighting quality supervision and inspection published by the Shanghai Municipal Bureau of Quality and Technical Supervision, even the LED lamps of well-known brands such as NVC have also suffered from “serious quality problems†such as unqualified protection against electric shock. On the list.
So, what causes LED flashlights to have frequent electric shocks? “To put it bluntly, it is the production enterprise to save costs.†Zhang Wei, investment director of Junsheng Investment Management Co., Ltd., said in an interview with reporters that “the LED lamps on the market are mostly composed of PC plastic and aluminum, of which 1/3 1/2 is aluminum. In order to save cost, most domestic enterprises use non-isolated power supply, the high-voltage part is directly connected with the metal casing, and only the resin layer of the aluminum substrate is used as the insulating material, which naturally causes great safety hazard. ."
The reporter learned that because lighting fixtures are difficult to achieve 100% complete leakage in structural design, in Europe and the United States where safety regulations are more stringent, high-voltage tests of lamps above 2000V are required to ensure that leakage risks are controlled. Within a certain range. In order to be able to pass safety certification, manufacturers generally use isolated power supplies. For the domestic market with huge price pressure, the cost of the isolated power supply is 1-2 dollars higher than that of the non-isolated power supply, which accounts for almost half of the price of the finished lamp. Therefore, many domestic enterprises choose to use the low-end aluminum-plastic structure lamp. Non-isolated power supplies for cost savings. However, such products sold in the domestic market are difficult to pass the safety certification of European and American countries.
In addition, the current LED lamps use a large amount of organic materials, which generate harmful smoke when burned, and become a fatal safety hazard in the event of a fire. In contrast, in public places such as subways in developed countries, not only most of the wires need to be iron pipes, but also the non-combustible materials are used as much as possible to ensure the safety under extreme conditions.
"It is undeniable that the less stringent domestic safety standards have greatly promoted the development of the industry, but it has also led many companies that are pursuing low-cost to exploit the loopholes. There are standards that are designed according to minimum standards. It is free to play," Zhang said.
To solve the glass tube or glass tube Road <br> <br> highly insulating and thermally conductive itself, even if a non-isolated power supply, but also to ensure safety.
In addition to aluminum-plastic tubes, LED tubes also have a technical route for glass. The reporter learned from the lighting association that the traditional incandescent lamp manufacturer represented by Foshan Lighting has used some of the original glass equipment and processes to produce LED lighting products for glass tubes, while the emerging LED lighting companies represented by Mulinsen Mainly made of PC plastic tube.
Zhang Wei believes that glass bulbs have higher light transmittance than PC plastics, and it is easier to achieve high light efficiency, but it is also easy to cause glare and other discomfort; when it encounters fire, glass will not produce toxic gas like non-flame retardant PC plastic. But glass has a series of problems because it is fragile. "There are various benefits, the key depends on the application." Zhang Wei said.
In this regard, Zhao Ning, technical director of Dynamic Chemicals, told the reporter that in fact, compared with aluminum-plastic tubes, the biggest characteristic of glass tubes is their high safety, because they are highly insulated and heat-conducting, even when using non-isolated power supplies. ensure safety. At the same time, the glass tube is fireproof and will not be deformed at high temperatures.
According to Zhao Ning, after the unremitting efforts and innovation of domestic enterprises in the near future, the technical indicators of glass lamps have made great progress, and the advantages compared with the general pipes are more distinct. In addition to good safety, it can pass CE, UL and other certifications with low cost and effective technical solutions to facilitate product export. First, the transmittance of glass is higher than that of PC plastic, and the thermal stability is excellent, and the glass tube is excellent. 360 degrees are in contact with air, uniform heat dissipation; second, the glass tube will not turn yellow for a long time, more resistant to dirt, corrosion, and more durable; third, the cost of transparent glass tube is much lower than "semi-plastic semi-aluminum "The tube, even in order to prevent glare, plus the cost of the inner surface of the glass tube through the process of sanding, spraying or corrosion, the cost of the glass tube has a great advantage; fourth, compared to aluminum, PC plastic, glass products are more environmentally friendly. . The carbon emission in the overall production process of the glass tube is only about 1/2 of that of the aluminum-plastic tube, and the anodization of the aluminum has the problem of contamination of the wastewater. In this way, the glass tube is more in line with the green concept of LED; fifth, compared with the traditional fluorescent tube, the glass tube has great similarity, which is in line with the visual habits of most people.
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Jiangmen Lika Lighting Electrical Appliances Co., Ltd , https://www.lika-led.com