With the development of the LED market, LED replacement of traditional high-pressure sodium lamps has become an inevitable trend. LED energy is composed of light energy + thermal energy. How to effectively improve heat dissipation efficiency, speed up the heat dissipation of lamps, reduce the heat energy generated by LEDs, and improve LED light. The main way of energy; Similarly, the heat dissipation problem of LED directly restricts the development of high-power LED lamps. How to quickly solve the heat transfer and heat dissipation of lamps is a key factor for LEDs to move toward high power. A new generation of honeycomb through-hole structure LED luminaires accelerates heat transfer and heat dissipation by changing the heat dissipation structure, and adopts a hexagonal through hole as a main structure, which not only stabilizes the structure, but also reduces the mechanical strength of the luminaire and reduces the luminaire. The weight, below we analyze the advantages of honeycomb through-hole LED lamps from two aspects of heat transfer and heat dissipation.
First, the heat transfer of LED lamps
The heat transfer of the luminaire is determined by the luminaire material. The die-cast aluminum luminaire generally uses ADC12 as the die-casting material of the luminaire. The thermal conductivity is 96.2 (W/mK), its strength is high, the pressure resistance is particularly good, and the hot brittleness is small. It is very suitable for die-casting of die-casting parts. It adopts honeycomb through-hole structure. The heat generated by the intermediate light source can be quickly transmitted to the outside through the honeycomb frame. The closer to the source substrate, the thicker the wall thickness of the honeycomb, which plays the role of fast heat transfer. The thinner the wall thickness of the outer honeycomb, the lower the weight of the lamp and the higher cost performance of the lamp.
Heat transfer diagram of honeycomb through-hole structure lamps
Second, the heat dissipation of LED lamps
The heat dissipation of the luminaire is determined by the contact area of ​​the luminaire heat sink with the air and the flow rate of air through the luminaire heat sink. Traditionally, the fascia with a fin fin radiator structure has a closed structure and a relatively large number of dorsal fins, so that the air performance of the dorsal fin is not good, the cold air cannot be quickly replenished, and the hot air cannot be quickly dissipated, thereby greatly affecting The overall heat dissipation performance of the luminaire, the heat dissipation principle of the fin fin radiator is as shown in the figure:
Rear fin heat sink cooling diagram
Therefore, the honeycomb through-hole heat dissipation structure evolved from the back fin heat dissipation structure has its unique heat dissipation advantage. Due to the heat dissipation structure of the upper and lower through holes, hot air can be quickly transmitted through the through holes, which is more in line with the principle of air convection and accelerates the air. The flow rate of the radiator with the lamp effectively improves the heat dissipation performance of the lamp.
Honeycomb through-hole structure luminaire heat dissipation diagram
Secondly, due to the use of the honeycomb hexagonal through-hole structure, the contact area with the air per unit area of ​​the LED lamp radiator is increased, and the speed of heat transfer from the center to the outside of the lamp is accelerated, and the heat dissipation performance of the lamp is again improved.
After actual testing, in the case of the same lamp power, the LED lamp with honeycomb through-hole heat dissipation has improved heat dissipation performance by more than 30% compared with the LED lamp with traditional back fin heat dissipation, and the lamp weight is reduced by more than 30%, which improves the performance of the product and reduces the performance. The weight of the product better meets the needs of the market.
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