The main structure of LED lamps using LED light source consists of LED, heat dissipation structure, driver, lens and other parts.The temperature inside the LED lamps will constantly rise after long-use.If the heat generated cannot be emitted in time, it will have a great impact on the service life of led road lighting lamps, and in serious cases, it will cause damage to LED street lights and lamp holder.So heat dissipation solution is an important part in led lighting system.
LED light Sources is the same as conventional light sources, semiconductor light-emitting diodes (LED) generate heat during operation, the amount depends on the overall luminous efficiency.The electric energy added in the working state of LED is not all converted into light energy, but part is converted into heat energy.
The heat dissipation performance of LED lamp body has great effect on the stability performance of LED street lights and lamp fixture quality.The main reason for the light failure of led lamps is that it has poor heat dissipation performance.The heat emitted by the internal LED chip is huge.But the heat dissipation problem of led lighting system is gradually being improved by street light manufacturers.The heat dissipation problem of too bright led street lights in the market often be solved by using natural insert radiator, which has bad effect.
So how does the street light factory solve the heat dissipation problem of LED street lamps?As top outdoor led lighting lamp manufacturer in China,providing led lighting system solutions for customer worldwide,EXC Streetlight will share 3 useful tips below:
1.Relying on external radiators such as aluminum shells and cooling fans to reduce the internal temperature of LED street lights, so as to achieve a relatively balanced internal environment, effectively emit internal heat and improve the overall heat dissipation performance.But the aluminum shell has electrical conductivity, can only be used in a relatively insulated environment.
2.Using thermal conductive silica gel.This is the solution adopted by most LED street light manufacturers today.Thermal conductive silica gel is a high-end thermal conductive compound, and will not cure, do not have electrical conductivity, can avoid the danger of short circuit.And it has high bonding performance and super thermal conductivity effect, is the best way to solve the heat dissipation problem of LED lamps.
3.Soft ceramic cooling paint is sprayed on the outside of LED street lamp holder.This heat dissipating paint can be applied to various shapes of heat dissipating structure, can also be adjusted into a variety of colors.It has a lot of very dense thermal conductive particles, the heat with large area can be volatilized, so as to reduce the temperature of LED street lamp holder.
The above three methods are common ways for street light manufacturers to solve the heat dissipation problem of LED street lamps. But the second method is the most widely used by far.Because the cost of thermal conductive silica gel is not as high as the other two, it can effectively reduce the price of LED street lamps.However, high-power LED street lamps require higher heat dissipation performance because of their greater heat dissipation, so manufacturers often need to be combine with the three methods.
According to a research data statistics: component temperature rises 2℃, reliability decreases 10%.In the LED lighting system composed of multiple LED serial connection and parallel arrangement, the heat dissipation problem is always concerned by the lighting industry.Solving heat management problems has become the primary factor for high-brightness LED applications.
LED street lamps produced by EXC take honeycomb through hole structure as heat dissipation structure, so that the heat of the light source can be quickly transmitted to the heat sink, and the heat generated by the light source can be quickly carried away from the shell by air convection,so that the overall temperature of the lamp is better controlled, so as to prolong the service life of the LED lamp.
