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LED radiator

A technology of LED radiator and phase change heat conduction, which is applied in lighting and heating equipment, semiconductor devices of light-emitting elements, cooling/heating devices of lighting devices, etc. rate reduction and other issues, to achieve the effects of light weight, low overall thermal resistance, and reduced contact thermal resistance

Pending Publication Date: 2017-08-22
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

However, the disadvantage of natural convection is that the convective heat transfer coefficient is low. In order to achieve a certain amount of heat transfer, a larger heat transfer area is required.
[0007] To sum up the above two points, the increase of the heat exchange area will lead to an increase in the cost, weight and space utilization of LED lamps.

Method used

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Embodiment Construction

[0032] In the prior art, when the metal radiator conducts heat, a temperature gradient will be generated with the distance from the LED, and the temperature will be uneven. In order to solve this problem and achieve a certain amount of heat transfer, it is necessary to increase the heat transfer area to compensate. In addition, most LED radiators avoid forced convection, and use natural convection with no maintenance, high reliability and no power consumption. However, the disadvantage of natural convection is that the convective heat transfer coefficient is low. In order to achieve a certain amount of heat transfer, a larger heat transfer area is required. Therefore, in the prior art, it is commonly used to solve the above technical problems by increasing the heat exchange area, but this will cause the problems of increased cost, increased weight and reduced space utilization of LED lamps.

[0033] In order to solve the above-mentioned technical problems, the present inventio...

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Abstract

The invention provides an LED radiator. The LED radiator comprises an inner cavity, fins and a light source mounting surface, wherein the light source mounting surface is in contact with the side surface of the barrel wall of the inner cavity; the LED light source is arranged on the surface of the light surface mounting surface; the fins are spaced in a fan-shaped mode outside the barrel wall of the inner cavity from the two sides of the light source mounting surface by taking the barrel wall of the inner cavity as center; directions of ripples at the two sides of each fin are reverse; directions of ripples opposite to every two adjacent fins are reverse; and the inner cavity is injected with phase-change heat conduction liquid. The LED radiator achieves better radiating effect by increasing a natural convection heat exchange coefficient of fins-air, further realizes a compact structure, lower cost and high efficiency, and is especially suitable for the LED light source with large power and high heat flux.

Description

technical field [0001] The invention relates to the technical field of LED heat dissipation, in particular to an LED radiator. Background technique [0002] Due to the high photoelectric conversion efficiency, LED light source can greatly save electric energy, and also has the characteristics of small size, long life, and easy control. Therefore, it is rapidly replacing traditional incandescent lamps, fluorescent lamps, metal halide lamps and high-pressure sodium lamps, etc., and is widely used in various fields. application. [0003] However, as a kind of semiconductor diode, LED light source must work within a certain temperature range; exceeding the rated temperature will cause significant light decay or even burn out. Especially for some high-power LED light sources, the heat flux density is very high, and the heat must be taken away in time and dissipated into the ambient air. Therefore, an efficient and reliable LED radiator is very necessary. [0004] At present, h...

Claims

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Application Information

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IPC IPC(8): F21V29/77F21V29/503F21V29/51F21Y115/10
CPCF21V29/503F21V29/51F21V29/773
Inventor 胡学功王际辉付万琴
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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