Capillary structure of heat pipe

Abstract

The utility model discloses a capillary structure of a heat pipe, which comprises a metal wire, the metal wire adopts a microstructure technology, the cross section of the metal wire is made into a petal shape, tiny grooves and bulges are formed on the surface of the metal wire, the surface area of the metal wire is increased, and the grooves can improve the guiding capability of liquid transmission, so that stronger capillary force can be generated on the whole; and the transmission capability of the liquid in the capillary structure is improved.

Description

Technical Field

[0001] The utility model relates to the field of heat pipes, and particularly to a capillary structure of a heat pipe. Background Art

[0002] A heat pipe utilizes the phase change process in which a medium evaporates at the hot end and condenses at the cold end to rapidly conduct heat. A heat pipe generally includes a shell and a capillary structure installed inside the shell. The capillary structure usually refers to the core structure inside the heat pipe, which includes a cotton core, a fiber mesh, a metal mesh, etc. Its main function is to transport the liquid working medium to the evaporation end through capillary action. The inside of the heat pipe is evacuated to a negative pressure state and filled with an appropriate liquid with a low boiling point. The liquid inside the heat pipe evaporates and gasifies at the hot end, condenses and liquefies at the cold end, and the condensed liquid is guided back to the hot end through the capillary structure for cyclic phase change. The capillary structure inside the heat pipe is very important for improving its heat transfer performance and overall efficiency. How to improve the capillary force of the capillary core is the technical problem to be solved by the present utility model. Summary of the Utility Model

[0003] The main purpose of the present utility model is to provide a capillary structure of a heat pipe, aiming to improve the capillary force of the capillary structure.

[0004] The present utility model provides a capillary structure of a heat pipe, including a metal wire, the cross-section of the metal wire is petal-shaped, and a plurality of grooves and protrusions are axially formed on its surface.

[0005] Preferably, the surface of the metal wire has a rough layer.

[0006] Preferably, the metal wire is a copper wire.

[0007] Preferably, a plurality of the metal wires are woven to form a metal wire woven mesh, a plurality of the metal wires are woven or gathered to form a metal core, and the metal wire woven mesh wraps the metal core therein.

[0008] Preferably, it further includes a high liquid absorption woven mesh formed by weaving ultra-fine fibers, a plurality of the metal wires are woven or gathered to form a metal core, and the high liquid absorption woven mesh wraps the metal core therein.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0010] For the capillary structure of a heat pipe provided by the present utility model, the metal wire used adopts micro-structure technology, and its cross-section is made into a petal shape, and tiny grooves and protrusions are formed on the surface of the metal wire, increasing the surface area of the metal wire. The grooves can increase the guiding ability of liquid transmission, so that overall, a stronger capillary force can be generated, and the transmission ability of the liquid in the capillary structure can be improved. Description of the Drawings

[0011] Figure 1Schematic diagram of the wire of the capillary structure in the embodiment of the present utility model.

[0012] Figure 2 Schematic diagram of the capillary structure in the embodiment of the present utility model.

[0013] Figure 3 Schematic diagram of the metal core of the capillary structure in another embodiment of the present utility model.

[0014] The realization of the object, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0015] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals are used to denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation of the present utility model.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above accompanying drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above accompanying drawings are used to distinguish different objects and not to describe a specific order.

[0017] Referring to

[0018] Referring to Figures 1 to 2 In the embodiment of the present utility model, a capillary structure of a heat pipe is provided, which includes a metal core 10 formed by braiding or gathering a plurality of wires 1 with a petal-shaped cross section. Among them, the wire 1 is a copper wire, and the copper wire adopts a micro-structure technology to make its cross section into a petal shape. Tiny grooves and protrusions are formed on the surface of the copper wire to increase the surface area of the copper wire. The grooves can increase the guiding ability of liquid transmission, so that overall, stronger capillary force can be generated, and the liquid transmission ability in the capillary structure can be improved.

[0019] The surface of the copper wire has a rough layer 11. The copper wire can be etched with an acidic solution to produce an irregular rough surface and form a rough layer; or the surface of the copper wire can be micro-etched through an electrolysis process to form a surface with rough texture, thereby forming a rough layer; or laser etching technology can be used to engrave micron- or nano-scale structures on the surface of the copper wire to form a rough layer; or nanostructures such as nanowires or nanoparticles can be directly formed on the surface of the copper wire through chemical vapor deposition (CVD) or physical vapor deposition (PVD), thereby forming a rough layer. Rough treatment is performed on the surface of the copper wire to increase the surface roughness. The rough surface can improve the adhesion and capillary adsorption ability of the liquid, thereby enhancing the capillary action.

[0020] Multiple metal wires 1 are woven to form a metal wire woven mesh 20, and multiple metal wires 1 are woven to form a metal core 10. The metal wire woven mesh 20 wraps the metal core 10. The weaving density of the woven metal core 10 is increased, making the capillary structure more compact and capable of generating a stronger capillary force. The double-layer setting of the metal wire woven mesh 20 and the metal core 10 enables the liquid to be transported through multiple directions and paths, improving the overall capillary force.

[0021] In another embodiment, the metal wire woven mesh is replaced with a highly absorbent woven mesh formed by ultra-fine fibers. As Figure 3 shown, multiple metal wires 1 converge to form a metal core, and the highly absorbent woven mesh wraps the metal core to form a composite capillary core. The highly absorbent woven mesh provides high absorbent capacity and capillary force, and the metal core composed of linear metal wires provides ultra-high thermal conductivity, improving the comprehensive performance.

[0022] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the protection scope of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict, make combinations, additions, deletions, or other adjustments to the features in the embodiments of the present invention according to the situation without making creative efforts, so as to obtain different technical solutions that essentially do not deviate from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A capillary structure of a heat pipe, characterized in that: It comprises a metal wire, the cross section of which is petal-shaped, and a plurality of grooves and protrusions are formed axially on the surface of the metal wire; the surface of the metal wire has a rough layer; a plurality of the metal wires are woven to form a metal wire mesh, and a plurality of the metal wires are woven or gathered to form a metal core, and the metal wire mesh wraps the metal core.

2. A capillary structure of a heat pipe, characterized in that: It includes a metal wire, the cross section of which is petal-shaped, and a plurality of grooves and protrusions are formed axially on the surface of the metal wire; the surface of the metal wire has a rough layer; it also includes a high-liquid-absorbent woven mesh formed by weaving ultrafine fibers, a plurality of the metal wires are woven or gathered to form a metal core, and the high-liquid-absorbent woven mesh wraps the metal core.

3. The capillary structure of the heat pipe according to claim 1 or 2, characterized in that: The metal wire is a copper wire.

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