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A phase-change heat pipe type high-power LED lamp and heat dissipation method thereof

A technology of LED lamps and heat dissipation methods, applied in lighting and heating equipment, cooling/heating devices of lighting devices, light sources, etc., can solve problems such as heat dissipation, affecting LED chips, and heat pipe failure, achieving efficient conduction and heat dissipation, Improve heat conduction efficiency and enhance the effect of contact area

Active Publication Date: 2020-01-31
GUANGDONG HI 1 NEW MATERIALS TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 4. The phase change of the heat exchange working medium must be carried out within a certain degree of vacuum. Once the vacuum degree in the cavity decreases, the resistance of the heat exchange working medium to absorb heat and phase change will increase significantly, which will seriously affect the heat loss of the LED chip.
However, in this heat dissipation method, the phase change material must be arranged in the direction of gravity. Due to the limitation of the flow of working fluid and heat transfer, the angle of inclination is usually very limited; even once it is tilted, the heat transfer will stop and the heat pipe will fail.

Method used

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  • A phase-change heat pipe type high-power LED lamp and heat dissipation method thereof
  • A phase-change heat pipe type high-power LED lamp and heat dissipation method thereof
  • A phase-change heat pipe type high-power LED lamp and heat dissipation method thereof

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Embodiment 1

[0045] Embodiment 1: A phase-change heat pipe type high-power LED lamp.

[0046] refer to Figure 1 to Figure 9 As shown, a phase-change heat pipe type high-power LED lamp includes: a radiator 400 for accelerating heat exchange, and a cavity 410 is arranged inside the radiator 400, and the cavity 410 is filled with a heat-exchanging working medium 500, and the cavity The inner wall of the chamber 410 is provided with getter fixing strips 600 alternately distributed at intervals, and the getter is fixed on the getter fixing strips 600. The cavity 410 is composed of a condensation chamber 411 and an evaporation chamber 412. The condensation chamber 411 Located above the evaporation chamber 412, the volume ratio between the condensation chamber 411 and the evaporation chamber 412 is 8-6:2-4, and the filling amount of the heat exchange working medium 500 is 30-90% of the volume of the evaporation chamber 412; the cavity The outer wall of 410 is provided with heat dissipation fins...

Embodiment 2

[0064] Embodiment 2: A method for dissipating heat from a phase-change heat pipe type high-power LED lamp.

[0065] refer to Figure 1 to Figure 9 As shown, a heat dissipation method for a phase-change heat pipe type high-power LED lamp specifically includes the following steps:

[0066] S1. LED heat transfer: the LED chip 100 generates heat during operation, and the heat is transferred to the heat sink 300 through the LED substrate 200, and the heat sink 300 transfers the heat to the heat exchange working medium 500 filled in the cavity 410 of the radiator 400 ;

[0067] S2. Vaporization and condensation of the heat exchange working medium 500: the liquid heat exchange working medium 500 absorbs the heat transferred by the heat sink 300 and then vaporizes rapidly, and the vaporized heat exchange working medium 500 rises to the radiator 400 condensation chamber 411 by gravity , because the temperature of the condensation chamber 411 of the radiator 400 is low, the vaporized ...

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Abstract

The invention provides a phase-change heat pipe type high-power LED lamp. The phase-change heat pipe type high-power LED lamp comprises a heat radiator, a heat sink installed at the bottom of the heat radiator, an LED substrate fixed to the bottom of the heat sink, an LED chip installed on the LED substrate, an end cover fixed to the top of the heat radiator, a filling pipe arranged in the center of the end cover and a heat radiating fin installed on the outer wall of a cavity. The cavity is formed in the heat radiator and filled with a heat exchange working medium, getter fixing strips alternately distributed at intervals are installed on the inner wall of the cavity, and a getter is fixed to the getter fixing strips. The phase-change heat pipe type high-power LED lamp is high in heat radiating efficiency, long in service life and capable of still ensuring the high heat radiating efficiency at a certain inclined angle. The invention further provides a heat radiating method capable of increasing the heat conduction and radiating speed of the phase-change heat pipe type high-power LED lamp.

Description

technical field [0001] The invention belongs to the technical field of LED lamps, and in particular relates to a phase-change heat pipe type high-power LED lamp and a heat dissipation method thereof. Background technique [0002] As an excellent semiconductor optoelectronic device, LED has become a new generation of solid-state energy-saving lighting source due to its small size, low power consumption, long service life, and environmental protection. With the development of LED to high light intensity and high power, its heat dissipation problem is becoming more and more prominent, which seriously affects the light output characteristics of LED and the life of the device, and has become a key problem that must be solved for high-power LED lamps. [0003] Nowadays, the technology related to high-power (above 200W) LED cooling systems is not yet mature. Most of the radiators available in the market use cooling fins directly pasted behind the substrate of the LED lamp package, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21K9/20F21V29/51F21V29/74F21V19/00F21Y115/10
CPCF21V19/0055F21V29/51F21V29/74
Inventor 王伟周天张上安李雪肖玮
Owner GUANGDONG HI 1 NEW MATERIALS TECH RES INST CO LTD