Here’s the overview of aluminum alloy heat sink, an important component that determines the performance and service life of LED lamps.
LED is known as a green light source, with low energy consumption, environmental protection, no pollution, long service life, small lamp body and wide range of application. It is perfectly competent for all kinds of indicator screens, display screens, decorative parts, general lighting and streetlights, etc. As a kind of LED lighting, LED energy-saving lamp has very significant characteristics: low cost, especially in power consumption. The energy consumption of white LED is only one tenth of that of incandescent lamp and one quarter of that of ordinary energy-saving lamp. High luminous efficiency, large luminous area, the same lighting effect, the traditional incandescent lamp needs 100W, while the LED energy-saving lamp only needs tens of watts to achieve the same effect. And led and other non glare, no stroboscopic, LED lights use DC drive, which is different from ordinary AC drive, which can well protect vision.
The research data show that after neutralizing many factors, only 30-40% of the electric energy of LED is converted into light energy, and the rest is converted into heat energy. When the temperature of LED chip is 25 °, the luminous efficiency is 100%; When the temperature reaches 60 °, the luminous efficiency is only 90%; When the temperature rises to 100 °, the efficiency decreases; The luminous efficiency of 140 ° is only 70%. When multiple LEDs are densely arranged to form a white light lighting system, the heat dissipation problem is more serious. Only by solving the heat dissipation problem can high brightness LEDs be realized.
Therefore, before the low heating LED chip is developed, the heat dissipation performance of the heat sink of the LED energy-saving lamp will directly affect the luminous rate of the LED energy-saving lamp. For the LED chip working at high temperature for a long time, the service life of the LED will be reduced linearly, the light attenuation and the color temperature will be affected.
At present, most of the LED radiators on the market are fin type heat dissipation made of aluminum alloy. The aluminum alloy has high thermal conductivity. The die-casting radiator is easy to handle the appearance and has beautiful sperm. The fin type heat dissipation also makes full use of the space area in the design, taking into account air convection and other factors, and the heat dissipation effect is very ideal. It can protect the lamp body from damage and improve the impact resistance. At the same time, aluminum alloy is also a recyclable material, which has no pollution to the environment and is conducive to recycling, which is in line with the concept of LED green light source. Shenzhen zinc alloy die casting factory has provided various models of aluminum alloy LED lamp heat sink for many manufacturers. Most use the paint baking process to spray white on the heat sink. Although at present, LED lamps cannot replace traditional energy-saving lamps in price due to technical reasons, with the continuous improvement of LED lamp technology and the continuous encroachment of LED lamps on the market of traditional lighting, the prospect of LED lighting will be bright with the improvement of technology.