Heat dissipation and characteristics of LED energy-saving lamps for lifting lighting

Time：2021-03-01 View：

LED heat dissipation
1. Aluminum cooling fin
This is the most common heat-dissipating method. Aluminum cooling fin is used as part of the shell to increase the heat dissipation area.
2. Heat conduction plastic box
When the plastic shell is injection molded, it is filled with thermal conductive materials to increase the thermal conductivity and heat dissipation capacity of the plastic shell.
3. Surface Radiation heat dissipation treatment
The surface of the lamp shell is treated with radiation heat dissipation. The simple thing is to apply radiation heat dissipation paint, which can bring the heat away from the surface of the lamp shell by radiation.
4. Air fluid mechanics
Use the shape of the lamp shell to produce convection air, which is the lowest cost enhancement heat-dissipating method.
5. Fan
The lamp shell uses a long-lived and efficient fan to enhance heat dissipation, with low cost and good effect. However, ventilator is a little troublesome, and it is not suitable for outdoor use. This design is relatively rare.
6. Heat pipe
Heat transfer tube technology is used to guide heat from LED chip to Shell cooling fin. It is a common design in large lamps, such as street lamps.
7. Liquid globe
Using liquid globe encapsulation technology, the transparent liquid with high thermal conductivity is filled into the lamp body globe. In addition to the reflective principle, this is the only technology that utilizes the heat conduction and heat dissipation of the LED chip's light surface.
8. Utilization of lamp holder
In household LED lamps with relatively low power, part or all of the heating driving circuits are often placed by using the internal space of the lamp holder. In this way, the heat dissipation of the lamp head with larger metal surface like the screw lamp head can be utilized, because the lamp head is closely connected with the metal electrode of the lamp holder and the power line. Therefore, a part of the heat can be derived from the heat dissipation.
9. Integration of heat conduction and heat dissipation-application of high heat conduction ceramics
The purpose of heat dissipation of the lamp shell is to reduce the working temperature of the LED chip. Because the expansion coefficient of the LED chip is very different from that of the metal thermal conductivity and heat dissipation materials we commonly use, the LED chip cannot be directly welded, in order to avoid high and low temperature thermal stress damaging the LED chip. The latest high thermal conductivity ceramic material has a thermal conductivity close to aluminum, and the expansion system can be adjusted to synchronize with LED chips. In this way, heat conduction and heat dissipation can be integrated to reduce the intermediate links of heat conduction.
The performance of LED lamp is affected by many aspects. Only by fully considering all aspects can qualified products be produced. As an led manufacturer, only by giving full play to innovative thinking and developing its own core technology can we truly establish a foothold in the market. The production of LED lamp is mainly in Shenzhen and Zhongshan, occupying most of the market share in the country, and the development of the North is relatively lagging behind due to the influence of the industrial chain.
As a new generation of energy-saving light source, led energy-saving lamps have broad application prospects, but there are still many technical problems ahead, looking forward to the perfection of the market

Features
1. Energy saving. The energy consumption of white LED is only 1/10 of incandescent lamp and 1/4 of energy saving lamp. (when rectifier loss is not considered, the energy consumption of most products in the market is marked value × 1.2~2)
2. Longevity. The average life span can reach more than 50,000 hours, which is "once and for all" for ordinary home lighting ".
3. Can work at high speed. If energy-saving lamps are frequently started or turned off, the filament will be blackened and quickly broken.
4. Solid-State packaging, belonging to the cold light illuminator type. So it is very convenient to transport and install, not afraid of vibration.
5. LED technology is progressing rapidly, its luminous efficiency is making amazing breakthroughs, and its price is also constantly decreasing. An era of LED entering the family is coming rapidly.
6. Environmental protection, no harmful substances of Mercury. The assembly parts of LED bulbs can be easily disassembled and assembled, and can be recycled by others without recycling by manufacturers.
7. Light distribution technology expands LED point light source into surface light source, increases luminous surface, eliminates glare, sublimates visual effect and eliminates visual fatigue.
8. Integrated design of lens and lampshade. The lens has the functions of concentrating and protecting at the same time, avoiding repeated waste of light and making the product more concise and beautiful.
9. High-power LED flat cluster package, integrated design of radiator and lamp holder. It fully guarantees the heat dissipation requirements and service life of LED, fundamentally meets the arbitrary design of LED lamp structure and shape, and has the distinctive features of LED lamp.
10. Energy saving is remarkable. Using ultra-bright high-power LED light source and high-efficiency power supply, it saves more than 80% of electricity than traditional incandescent lamp, and the brightness is 10 times that of incandescent lamp under the same power;
11. Super long service life is more than 50,000 hours, more than 50 times that of traditional tungsten lamp. LED adopts advanced packaging technology with high reliability-Eutectic Welding, which fully guarantees the super long service life of LED.
12. No stroboscope. Pure DC work eliminates visual fatigue caused by strobossing of traditional light sources.
13. Green and environmentally friendly. It does not contain pollution elements such as lead and mercury, and does not pollute the environment.
14. Impact resistance, strong lightning resistance, no ultraviolet (UV) and infrared (IR) radiation. No filament and glass shell, no traditional lamp cracking problem, no harm to human body, no radiation.
15. Work under low thermal voltage, safe and reliable. Surface temperature ≤ 60 ℃ (when ambient temperature Ta = 25 ℃).
16. Wide voltage range, universal. Constant current in the full voltage range of 85V ~ 264VAC ensures that the life and brightness are not affected by voltage fluctuations.
17. PWM constant current technology is adopted, which has high efficiency, low heat and high constant current precision.
18. Reduce line loss and no pollution to the power grid. Power factor ≥ 0.9, harmonic distortion ≤ 20%,EMI conforms to global indicators, reducing power loss of power supply lines and avoiding high-frequency interference pollution to the power grid.
19. General standard lamp holder, which can directly replace the existing halogen light fixtures, incandescent lamp and fluorescent lamp.
20. The luminous efficiency can be as high as 801mb/w, a variety of color temperature options, high color rendering index and good color rendering.