Hot-runner diffusion type LED street lamp radiating solution

Abstract

The invention discloses a hot-runner diffusion type LED street lamp radiating solution. By using the chimney radiating principle, a related three-dimensional radiating system in a longitudinal radiation design, a transverse radiation design and a vertical radiation design is realized by using a hot runner, a radiating device and a hot runner plate. Meanwhile, the arc-shaped smooth shape can be used for enlarging a radiating shell of the lamp so as to increase the radiating area, and also can be used for protecting the lamp body; and the dirt blockage of a radiating passage is prevented in the using process through rain washing and other modes. The hot-runner diffusion type LED street lamp radiating solution has the advantages of energy conservation, environmental protection, easy cleaning and maintenance, and long service life.

Description

technical field The invention relates to an LED street lamp, in particular to a solution to the heat dissipation problem of a hot runner diffusion type LED street lamp. Background technique Because the luminous intensity of the LED is almost linearly related to the forward current IF, in order to pursue high-power, high-brightness LED products, people continue to increase the forward current IF to increase the luminous flux of the LED. While increasing the current, the LED produced The heat will also increase proportionally. However, the junction temperature of the LED is generally not allowed to exceed 85°C, and every time the junction temperature of the LED exceeds 10°C, the life of the LED will be reduced by 50%, and it will also cause the LED current to drift to the left, resulting in a corresponding decrease in LED luminous efficiency. In order to solve the heat generated by LEDs during the working process, the current solution to heat dissipation in the industry is t...

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Problems solved by technology

However, the junction temperature of the LED is generally not allowed to exceed 85°C, and every time the junction temperature of the LED exceeds 10°C, the life of the LED will be reduced by 50%, and it will also cause the LED current to drift to the left, resulting in a corresponding decrease in the LED luminous efficiency.

In order to solve the heat generated by LEDs during the working process, the current solution to heat dissipation in the industry is to use a finned layer to pass through the overall profile to dissipate heat, and at the same time cooperate with an aluminum alloy frame die-casting to form a light source sealed room to meet the protection requirements of the lamp. However, when the lamp works outdoors, dust and bird droppings accumulate between the fins of the heat dissipation profile for a long time, which is equivalent to adding a cover to the lamp, causing difficulty in heat dissipation and failing to achieve ideal heat dissipation; For the accumulated problems, the way of increasing the heat dissipation area of ​​the lamp heat dissipation shell is adopted, and then the heat dissipation profile is installed inside the heat dissipation shell of the die-casting part. However, the thermal conductivity of the die-cast aluminum alloy used in the mature aluminum alloy die-casting technology is less than 100W / m.K , although it meets the requirements of the protection design, it increases the heat transfer gap and cannot achieve the ideal heat dissipation effect

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