LED street light construction speed concerns heat dissipation technology into core competitiveness

Some applications of low-carbon wave LED lighting have also received a high degree of attention. The speed and use of LED street lamps that are part of the national infrastructure have attracted much attention. Compared with traditional street lamps, LED has energy saving, environmental protection, The advantages of high efficiency and high stability, but the quality requirements are very important under the consideration of cost and weather conditions.

With the advancement of LED industry technology, the difference between cost and traditional lighting will become smaller and smaller. Therefore, how to maintain stable lighting quality becomes a key factor in harsh environments. Judging from the actual application in various places, LED street lamps still have some way to go before they are fully adopted. In addition to the enactment of laws and regulations and related policies, relevant manufacturing processes, power management, and heat dissipation technologies are also factors in the industry's rapid progress. Have to admit that the LED industry is indeed the most dazzling star.

Looking ahead to the 2011 LED street market

According to industry estimates, if LED street lamps replace Taiwan’s traditional mercury street lamps in Taiwan, they will achieve an annual saving of 9.8 million kilowatt-hours of electricity. Although the Energy Bureau of the Ministry of Economic Affairs is expected to implement a high-efficiency streetlight subsidy program in 2011, it was pointed out that the government At present, there is no specific subsidy plan for LED street lamps. Therefore, most of LED manufacturers are exported to Europe, America and mainland China. Compared with 350,000 in 2010, the LED street light market in mainland China will reach 500,000 miles in 2011. Although it is currently in a state of contention, after years of competition and elimination, the positioning of various manufacturers will gradually increase. Clear, and the market will quickly expand.

LED street lamp cooling air cooling system is more competitive

How to integrate heat dissipation modules and LEDs will be a key project for future outdoor lighting. Looking at the LED lighting promotion policies and related laws and regulations around the world, almost all schedules have been carefully planned. They all began to completely stop using incandescent light bulbs and switch to LED lighting in 2012. Therefore, LED street lamps will bear the brunt of policy factors and will start. Replace traditional street lamps. In addition, the mainland government’s previous “Ten Cities and Ten Thousand Houses” program has expanded to the current “Five Cities and Two Millions”, as well as some European and American rewards, penalties, and subsidies.

LED street light quality is the key to winning

The quality of LED street lights is the key issue. Taiwan has built more than 20,000 LED street lamps in the past three years. According to the survey of the ITRI, there are currently about 1.7 million street lamps in Taiwan, which once led to low competition in the industry. However, due to the fact that the performance of LED street lamps varies greatly from place to place, quality is different, so many problems have been discovered after the actual installation of LED street lamps. The average failure rate is as high as 8.2%. For infrastructure construction, such quality is definitely not stable enough. Problems include power management and control, thermal treatment, and waterproof design.

The key to LED quality lies in the "design of thermal modules"

Wang Baijun, project manager of Market Development Department of Chuanxiang Micromotor Marketing Center, stated that since LED street lights or outdoor lighting applications are all high brightness and high power LED applications, if the design of the heat sink module does not take into account the characteristics of the use of the environment, It will cause light failure due to poor heat dissipation, and it will affect the overall service life, even the climate and other factors (lightning strikes, typhoon, frost and snow, etc.), are all details that must be considered in the overall design, so in the "internal Under the circumstance of suffering, "heat dissipation module design" will be its main key technology.

The LED street light heat dissipation methods are broadly classified into active heat dissipation and passive heat dissipation (mainly differing in terms of whether or not additional drive energy is required for heat dissipation), and active heat dissipation of air-cooled heat sinks (fans) in outdoor and large-scale LED lighting applications. ) More competitive, with its own diversion effect, and the use of heat exchange between the air and the heat sink to take away the heat accumulated, to achieve "forced convection" cooling mode.

The fan is already the key to LED heat dissipation

According to the above, the cooling of current LED street lamps is mainly based on the fan's relatively competitive price and performance. Currently, there are several considerations when using a fan as a heat dissipation module: size, airflow direction and overall design, noise, and fan failure rate. Manager Wang mentioned that outdoor LED lighting must be designed with proper cooling modules taking into account changes in the environment. This is an appropriate solution. Some places where the temperature difference between day and night is too high, or there are various uncontrollable environmental factors such as snow and dust. , must be regarded as affecting the causes of LED performance, and then to overcome.

Manager Wang pointed out that Chuanxiang Micro-motor had successfully entered the LED street light market several years ago, and was applied in many international streetlight tenders. Therefore, the application technology of fans in LED has been very mature. In addition to the improvement in the performance of the drive motor and the improvement of the bearing material of the fan itself, the direction of the future is to advance toward high life, low noise, and high reliability. For outdoor and high-power LED lighting applications, Still need to rely on the overall thermal module design, with LED through the harsh test of the external environment, this is the biggest of them, after the breakthrough, I believe the LED generation is coming soon.

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