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LED lamp structure analysis and design problems
- Mar 23, 2017 -

First, the material surface treatment (with power supply), it is difficult to withstand harsh environment of erosion for a long time. So-called "naked" lamp is the radiator directly exposed in the Street outside. Some are of the opinion that this is more conducive to the heat, but the premise is the lamp must be installed in a relatively clean and free from outside in the harsh conditions of the environment, and practical application of lamps are mounted directly on the outdoor, potential for exposure to acid rain, sandstorms, blizzards, and other harsh environments.

Secondly, due to the smaller proportion of aluminum, superior heat dissipation, LED lamp heatsink is aluminum alloy, but the chemical properties of aluminium alloys are very active, easily react with acids and bases, oxidation of exposed to air is also very easy. Although after Anodic oxidation processing the corrosion performance is greatly improved, but must still cannot guarantee that the oxide film installation from being destroyed, when after the destruction of the oxide film, active chemical properties of aluminum alloys can show it. Of pollution in some places prone to acid rain, acid water will accumulate in the body with some cracks and grooves, once the storm cracks or grooves acid volatile corrosion of water body affected by corrosion of body will not only affect the appearance, heat and impact properties.

Second, rectangular designs wind-resistance requirements are not met. Mentioned here refers to the rectangular lamps are nearly square body shape, each side is a large area of the plane. Such a plane more comfortable, when the wind blew in from a perpendicular to the plane, and flat wind cannot be differentiated, so as to put pressure on structure of light poles and fixtures. This pressure is not obvious in normal circumstances, but when the lamp light pole after after a long period of ageing and corrosion, if run into typhoons in coastal areas, may have poles leaning or bending or light fixtures to fall risk.

Third, the thermal conductivity effect LED street light failure rate is high. Heat island effect mainly refers to the temperature is higher than the surrounding suburbs of the city, like a warm island located in rural cooler, "Ocean", a phenomenon known as the urban heat island effect. In large LED lamp heatsink on this phenomenon, especially when it only by natural convection.

Finally, overall design cause maintenance difficulties. The overall design is the lighting light source cavity design into an unmaintainable as a whole as a whole, or light and power cavities designed as a whole that cannot be maintained. In recent years the practice that LED lighting could make it maintenance-free. And this cannot be maintained the same overall type, general way when a failure in the elevated cars unable to complete maintenance tasks, the lamp to be replaced back to factory repair. This will force both manufacturers from a manufacturer to manufacturer and service provider role, need to pay a heavy price.

Finally, sharp edges naked heat, lighting safety standard requirements are not met. Sharp edges means body of certain metal parts appear more sharp sharp corners.