CN102931153A - Radiator for microgroove column group - Google Patents

Abstract

The invention discloses a micro-groove column group radiator. It includes working medium liquid, working medium steam, micro-groove column, sealed cavity and finned radiator; the bottom of the sealed cavity is equipped with multiple micro-grooved columns, working medium liquid, and the upper part of the sealed cavity is equipped with a finned radiator. Working medium steam is arranged under the fin radiator. The vapor-liquid phase transition temperature of the working medium vapor corresponding to the pressure in the sealed cavity is -20°C to 200°C. The surface of the micro-grooved column is provided with micro-grooves, the width of the micro-grooves is 0.01mm-1mm, and the depth of the micro-grooves is 0.01mm-1mm. The liquid level of the working fluid is lower than the height of the microgroove column. The invention can solve the problem of cooling a heating object with a large heat flux density in a small contact area.

Description

A micro-groove column group radiator

technical field

The invention relates to a heat sink, in particular to a micro-groove column group heat sink.

Background technique

With the development of the semiconductor industry, the integration of circuits is getting higher and higher, and the heat flux density of electronic devices is also increasing. Such as CPU, high-power LED and other electronic devices need to be cooled with high heat flux density in a limited area. Conventional solid heat sinks need to conduct heat in a limited area to the surface of the heat sink with a larger area through copper, aluminum and other conductors, and using solids for longer distance heat conduction will bring greater thermal resistance. The invention utilizes the micro-groove column group to promote the evaporation and boiling of the working medium liquid, so that the local large heat flow is quickly diffused to a wider space, and the thermal resistance caused by long-distance solid heat conduction is avoided.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a micro-groove column group heat sink for solving the problem of cooling a heating object with a relatively large heat flux density in a small contact area.

The micro-groove column group radiator includes working fluid, working medium steam, micro-groove column, sealed cavity and finned radiator; the bottom of the sealed cavity is equipped with multiple micro-grooved columns and working liquid, and the upper part of the sealed cavity is equipped with Finned radiator, working medium steam is arranged under the finned radiator.

The vapor-liquid phase transition temperature of the working medium vapor corresponding to the pressure in the sealed cavity is -20°C to 200°C. The surface of the micro-grooved column is provided with micro-grooves, the width of the micro-grooves is 0.01mm-1mm, and the depth of the micro-grooves is 0.01mm-1mm. The liquid level of the working fluid is lower than the height of the microgroove column.

The invention effectively solves the problem of cooling a heating object with a relatively large heat flux density in a relatively small contact area.

Description of drawings

Figure 1(a) is a schematic diagram of the structure of the micro-groove column group radiator;

Figure 1(b) is a cross-sectional view of B-B in Figure 1(a);

Fig. 1(c) is a sectional view of A-A in Fig. 1(a).

In the figure, the working medium liquid 1, the working medium steam 2, the micro-groove column 3, the sealed cavity 4 and the fin radiator 5.

Detailed ways

As shown in Figure 1, the micro-groove column group radiator includes a working medium liquid 1, a working medium steam 2, a micro-groove column 3, a sealed cavity 4 and a fin radiator 5; the bottom of the sealed cavity 4 is provided with a plurality of micro-grooves The column 3, the working medium liquid 1, the upper part of the sealed cavity 4 is provided with a finned radiator 5, and the lower part of the finned radiator 5 is provided with a working medium steam 2.

The vapor-liquid phase transition temperature of the working medium steam 2 corresponding to the pressure in the sealed cavity 4 is -20°C to 200°C. The working medium liquid and the working medium vapor can be the same substance, or a mixture of several substances.

The surface of the micro-grooved column 3' is provided with micro-grooves, the width of the micro-grooves is 0.01mm-1mm, and the depth of the micro-grooves is 0.01mm-1mm. The cross-sectional shape of the micro-grooved column can be various forms such as circle, square, cross, and rice.

The heating element of the present invention is connected with the micro-groove column group radiator on one surface where the working liquid exists. The heat of the heating element is conducted to the working liquid and the micro-groove columns through the wall of the cavity. The working medium liquid evaporates or boils when heated to form working medium vapor. The microgroove column group uses the surface tension of the liquid to pull the working fluid to the surface of the column to promote the evaporation of the working fluid. The working medium steam brings heat to the side of the cavity with fins, and the fins discharge the heat to the air, so that the working medium steam is cooled and condensed into a liquid, and returns to the heating surface. It effectively solves the cooling problem of a heating object with a large heat flux density in a small contact area.

Claims (4)

1. A micro-groove column group radiator, characterized in that it includes a working medium liquid (1), a working medium steam (2), a micro-groove column (3), a sealed cavity (4) and a fin radiator (5) ; The bottom of the sealed cavity (4) is provided with a plurality of micro-groove columns (3), the working fluid (1), and the upper part of the sealed cavity (4) is equipped with a finned radiator (5), and the finned radiator (5) Working medium steam (2) is provided below. 2. A micro-groove column group radiator according to claim 1, characterized in that the vapor-liquid phase transition temperature of the working medium steam (2) corresponding to the pressure in the sealed cavity (4) is - 20℃～200℃. 3. A micro-groove column group radiator according to claim 1, characterized in that the surface of the micro-groove column (3) is provided with micro-grooves, the width of the micro-grooves is 0.01 mm to 1 mm, and the micro-grooves The depth of 0.01mm ~ 1mm. 4. The micro-groove column group radiator according to claim 1, characterized in that the liquid level of the working fluid (1) is lower than the height of the micro-groove columns (3).

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