Plate-type pulsating heat pipe used in large power LED heat radiation

A pulsating heat pipe, high-power technology, used in indirect heat exchangers, lighting and heating equipment, semiconductor devices of light-emitting elements, etc., can solve the problems of unstable temperature fluctuations in the evaporation section, difficult working cycle stability, and local temperature rises. , to achieve the effect of enhancing startup performance and heat transfer efficiency, improving work reliability, and enhancing stability

Inactive Publication Date: 2012-09-26
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to its working characteristics, the working cycle of the traditional pulsating heat pipe is not easy to be stable, and the evaporation section is prone to d

Method used

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  • Plate-type pulsating heat pipe used in large power LED heat radiation
  • Plate-type pulsating heat pipe used in large power LED heat radiation
  • Plate-type pulsating heat pipe used in large power LED heat radiation

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0027] The structure of the present invention includes: cover plate, substrate, capillary bundle, liquid plug, cavity, capillary bundle lower elbow group, capillary bundle upper elbow group, liquid filling port, LED chip mounting screw hole;

[0028] The capillary bundle, the cavity communicating with the lower part of the capillary bundle, and the liquid filling port at the upper part of the capillary bundle communicating with the capillary bundle are milled out on the substrate. The section of the capillary is rectangular or triangular, and the two ports of each capillary bundle are independently connected to each other. The cavity is connected, and the connection position is asymmetrical. The substrate and the cover are connected by vacuum brazing. The filling port is installed with a valve to form a sealed space that can form a vacuum environment. The screw hole is installed to connect the LED chip, and the cavity is installed with a capillary or micro Channel structure

[0029...

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Abstract

The invention discloses a plate-type pulsating heat pipe used in large power LED heat radiation, comprising a cover plate, a substrate, a capillary beam, a liquid plug, a cavity, a capillary beam lower bend set, a capillary beam upper bend set, a liquid feeding port and a LED chip installation screw hole. The capillary beam, the cavity communicated with the capillary beam bottom and the liquid feeding port positioned on the upper portion of the capillary beam and communicated with the capillary beam are milled on the substrate. A cross section of the capillary is a rectangular cross section or a triangular cross section. Two ends of each capillary beam are respectively independently connected with the cavity, and the connection positions are unsymmetric. The substrate and the cover plate are connected through vacuum brazing. The liquid feeding port is arranged with a valve and forms a sealed space that can form a vacuum environment. The installation screw hole is in external connection with the LED chip, and the cavity is equipped with a capillary core or a micro-channel structure. The heat pipe has the characteristics of stable work, high heat transferring efficiency, high heat transferring limit, and low temperature fluctuation in an evaporation zone.

Description

technical field [0001] The invention relates to a plate-type pulsating heat pipe used for heat dissipation of high-power LEDs and related electronic devices, belonging to the field of electronic device cooling and high-efficiency heat transfer. Background technique [0002] High-power LED (Light Emitting Diode) generally refers to the chip heat flux density greater than 1W / mm 2 Solid State Lighting (SSL) is generally considered to be the fourth generation of lighting after incandescent lamps, fluorescent lamps and high-pressure discharge lamps. Compared with the previous three generations of lighting equipment widely used by humans, it has the advantages of energy saving, environmental protection and long life. Based on incandescent lamps, LED light sources only need 10%-30% of their electric energy at the same lighting brightness, and their lifespan is dozens of times longer. In addition, the advantages of LED light source also include: fast switch response, high impact r...

Claims

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Application Information

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IPC IPC(8): F21V29/00F21Y101/02F21V29/51F21Y115/10
CPCF28D15/0266
Inventor 张莹马强周志磊倪泽联
Owner NANCHANG UNIV
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