Thermal cooling and improvement strategy of LED lighting products
With the continuous development of LED technology, LED lighting products have received more and more attention. Compared with traditional lighting sources, LED lighting sources are solid-state cold light lamps, which have the advantages of long service life, high light efficiency, no radiation, less power consumption, good impact and shock resistance, high safety and so on. However, LED lighting products are prone to excessive temperature in the process of use, In particular, the heating problem of some high-power LED lighting products is serious. LED is a high-temperature sensitive element. If its calorific value is large and the temperature is too high, it will directly affect the lighting effect and color temperature of LED, and even have a serious impact on the normal use of LED lighting products.
Influence of high temperature on the performance of LED :
1 high temperature causes permanent damage to LED,
2. High temperature will shorten the service life of LED,
3. High temperature will affect the luminous effect of LED.
Thermal issues of LED lighting:
1. Bending and cracking of parts caused by thermal expansion,
2. Operation obstacle of electronic circuit,
3. High temperature reduces the quality of products.
Thermal solution optimization：
Use suitable heatsink, When packaging LED, it will not directly connect the heat sink or set the electric fan, and the power circuit board of LED will produce a lot of heat energy, which makes the cooling and heat dissipation of LED lighting products a very thorny problem. For this, it is necessary to select the heat sink reasonably. The heat sink can expand the mutual contact surface between the surface of LED lighting products and indoor air, so as to improve the cooling efficiency of LED lighting products
Fin design of the heatsink,Usually, the external surface of the heat sink is processed into fins. There are many kinds of fins, and the number, position, specification, inclination angle and thickness of the fins must be carefully selected according to the needs. In addition to the ordinary straight-line shape, the fins also have wavy, spiral, long oval and cone-shaped shapes. The manufacturing purpose of various forms is to facilitate indoor air convection, rain washing, etc., in order to obtain the best cooling efficiency.
The choice of heatsink material, copper has better thermal conductivity than aluminum, but the heat dissipation speed of copper is slower than aluminum. Therefore, a new copper aluminum composite heat sink can be used in combination with the advantages of copper and aluminum. In the copper aluminum composite heat sink, copper can quickly bring the high heat generated by led to aluminum, and then the aluminum alloy fins will emit the high heat, so as to improve the heat dissipation efficiency.
With the development of science and technology, in order to solve the thermal problem of LED lighting products, it is necessary to select appropriate construction materials such as metal heat pipes according to the actual situation. When using LED lighting products, users should not only pay attention to the thermal performance of products, but also pay attention to the impact of environmental factors on the heat dissipation of LED lighting products.
