Shanghai Ceyuan Industrial Co.,Ltd

Shanghai Ceyuan Industrial Co.,Ltd

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Shanghai Ceyuan Industrial (SCI) Ltd.

ADD:Room 901, No.20, Lane777, West Guangfu Road, Putuo District, Shanghai, China. 

Contact: Ellie Wang

TEL: +86-573-82753308

Mobile: +8618042017693

FAX: +86-573-82753302



Outdoor LED Fixtures Cooling Material Selection

LED outdoor lighting due to the work environment is more complex, by the temperature, ultraviolet light, humidity, rainy weather, dust, chemical gases and other natural conditions, over time, will cause the LED light failure serious problem. So the final consideration, outdoor lighting designers in the design of the time should consider these external environmental factors on the impact of LED outdoor lighting.

Outdoor LED lamps in the choice of cooling materials should pay attention to matters

Shell and radiator design as one, used to solve the problem of LED heating, this way better, generally use aluminum or aluminum alloy, copper or copper alloy, and other good thermal conductivity of the alloy. Heat dissipation has air convection cooling, strong wind cooling and heat pipe heat dissipation, (jet air cooling is also similar to a heat pipe heat dissipation, but the structure is more complex.

Choose what kind of cooling methods, the cost of lighting has a direct impact, should be considered, and design products supporting the best program. In the case of

The design of the shade is also essential, the current use of transparent plexiglass, PC materials, etc., the traditional shade is a transparent glass products, what kind of material selection shade with the design of the product grade positioning, in general, outdoor lighting The shade is best for traditional glass products, it is the manufacture of long life, the best choice for high-end lamps. The use of transparent plastic, plexiglass and other materials to do the lampshade, do indoor lamp shade better for outdoor life is limited, because the outdoor sunshine, ultraviolet light, dust, chemical gas, day and night temperature changes and other factors to shorten the life of the lamp cover , Followed by pollution is not easy to clean up, so that the shade transparency reduces the impact of light output.

Outdoor LED chip packaging technology

At present, domestic production of LED lamps (mainly street lamps) are mostly using 1W LED string, parallel assembly, this method of thermal resistance than advanced packaging technology products are high, not easy to create high-quality lamps. Or the use of 30W, 50W or even larger modules assembled to achieve the required power, these LED packaging materials useful epoxy resin package, useful silicone package. The difference between the two is: epoxy resin package temperature is poor, a long time easy to aging. Silicone package is better temperature, the use should pay attention to choice. In the case of

Using multi-chip and radiator overall package is better, or the use of aluminum substrate multi-chip package and then through the phase change material or heat grease and heat sink connected to make the product thermal resistance than the LED device assembly of the thermal resistance of the product Less one to two thermal resistance, more conducive to heat. The use of LED modules of the lamp, the module substrate is generally copper substrate, it is connected with the external radiator to use a good phase change material, or a good heat grease to ensure that the heat on the copper substrate can be spread to the external radiator Up, such as the treatment is not easy to make heat accumulation caused by the module chip temperature rise too high, the impact of led chip work properly. I believe that: multi-chip package suitable for the manufacture of ordinary lighting, modular packaging for space limited occasions to create compact led lamps (such as car main lighting headlights, etc.). In the case of

Research on Outdoor Radiator Design of LED Lamps

Radiator is a key part of the led lamp, its shape, volume, heat surface area should be designed to get the benefits, the radiator is too small, led lamp operating temperature is too high, the impact of luminous efficiency and life, radiator too, The consumption of materials and more increase product costs and weight, so that product 竟争力 decline. Design the appropriate led lamp radiator is essential. The design of the radiator has the following parts:

1. Clear the power of the LED lamp to be dissipated. In the case of

2. Design some parameters for the radiator: the specific heat of the metal, the thermal conductivity of the metal, the chip thermal resistance, heat sink thermal resistance, ambient air resistance and so on. In the case of

3. Determine the type of use, (natural convection cooling, strong wind cooling, heat pipe cooling, and other heat dissipation methods.) From the cost comparison: natural convection cooling the lowest cost, strong wind cooling medium, heat pipe cooling costs higher jet jet The highest cost. In the case of

4. Determine the maximum operating temperature permissible for LED lighting (ambient temperature plus lamp permissible temperature rise)

5. Calculate the volume of the radiator, heat dissipation area. And determine the shape of the radiator. In the case of

6. The radiator and LED lights combined into a complete lamp, and power for more than eight hours, at room temperature 39 ℃ - 40 ℃ environment to check the temperature of the lamp to see if the heat requirements to meet the test to verify whether the correct, if not Meet the conditions of use, will have to recalculate and adjust the parameters. In the case of

7. Radiator and shade seal to be waterproof, dustproof, shade and radiator between the anti-aging rubber pad or silicone rubber pad, with stainless steel bolts fastened, so sealed waterproof, dust through the above four Point of attention, and then refer to China's latest outdoor lighting lamps and lanterns technical specifications, as well as urban road lighting design standards, which is outdoor lighting designers in the necessary basic knowledge.

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