Large-volume vapor chamber

Abstract

A large-volume vapor chamber includes: a body provided with an accommodation cavity formed by two main cavity walls arranged oppositely; and connecting columns disposed on the body, where each of the connecting columns includes a column section and two bearing sections, the two bearing sections are connected to both ends of the column section respectively, the column section and the bearing sections are positioned between the two main cavity walls, the two bearing sections abut against the two main cavity walls respectively, and a cross-sectional area of the column section perpendicular to a central axis of the respective connecting column is less than a cross-sectional area of each of the bearing sections perpendicular to the central axis of the respective connecting column.

Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application is based on and claims the benefit of priority from Chinese Patent Application No. 202422550023.1, filed on Oct. 21, 2024, the entirety of which is incorporated by reference herein.TECHNICAL FIELD

[0002] The present disclosure relates to the field of vapor chambers, and in particular, to a large-volume vapor chamber.BACKGROUND

[0003] Vapor chambers are mainly used in electronic products and equipment that require rapid heat dissipation and high heat flux. Some existing vapor chambers include a body and connecting columns, the body is usually formed by overlapping and connecting two component plates, an accommodation cavity is provided in the body, the accommodation cavity has two opposite main cavity walls, the two ends of each of the connecting columns are abutted and connected to the two main cavity walls of the accommodating cavity respectively, for supporting and fixing the two main cavity walls. The accommodating cavity is filled with capillary structures and liquid thermal-conductive medium. At present, the connecting columns need to occupy a significant amount of space in the accommodation cavity, which affects the thermal-conductive property of the vapor chamber. There remains potential for further improvement in the thermal performance of ‘vapor chambers.SUMMARY

[0004] The present disclosure aims to solve at least one of the technical problems in the existing technology. To this end, a large-volume vapor chamber is proposed, which can reduce the space occupied by connecting columns in an accommodation cavity and improve the thermal-conductive property of the vapor chamber.

[0005] The large-volume vapor chamber according to an embodiment of the present disclosure includes a body provided with an accommodation cavity formed by two main cavity walls arranged oppositely; and connecting columns disposed on the body, where each of the connecting columns includes a column section and two bearing sections, the two bearing sections are connected to both ends of the column section respectively, the column section and the bearing sections are positioned between the two main cavity walls, the two bearing sections abut against the two main cavity walls respectively, and a cross-sectional area of the column section perpendicular to a central axis of the respective connecting column is less than a cross-sectional area of each of the bearing sections perpendicular to the central axis of the respective connecting column.

[0006] The large-volume vapor chamber according to an embodiment of the present disclosure has at least the following beneficial effects. The column section and the bearing sections of each of the connecting columns are positioned in the accommodation cavity, each connecting column supports the two main cavity walls through the two bearing sections. In this way, the bearing sections can maintain sufficient support connection strength with the corresponding main cavity walls. Meanwhile, since the cross-sectional area of the column section is smaller than that of the bearing sections, the volume of the column section is reduced, thus reducing the space occupied by the connecting columns in the accommodation cavity. This ensures that the effective volume of the accommodation cavity is increased, thereby accommodating more capillary structures and liquid thermal-conductive media, thus improving the thermal-conductive property of the vapor chamber.

[0007] According to some embodiments of the present disclosure, the bearing sections and the column section are all in a cylindrical shape, a diameter of the column section is smaller than a diameter of each of the bearing sections, and central axes of the bearing sections are coaxially arranged with a central axis of the column section.

[0008] According to some embodiments of the present disclosure, the diameter of each of the bearing sections is A that satisfies A≥1 mm, and the diameter of the column section is B that satisfies B≥0.5 mm.

[0009] According to some embodiments of the present disclosure, a dimension of each of the bearing sections along a direction of the central axis of the respective connecting column is C, and a dimension of the column section along the direction of the central axis of the respective connecting column is D, where D>0.2 (2*C+D).

[0010] According to some embodiments of the present disclosure, a dimension of each of the bearing sections along a direction of the central axis of the respective connecting column is C that satisfies C>0.2 mm.

[0011] According to some embodiments of the present disclosure, each of the main cavity walls is provided with mounting through holes, each of the connecting columns further includes two plugging sections, the two plugging sections are connected respectively to the two bearing sections at a side away from the column section, the plugging sections are inserted into the mounting through holes respectively, and the plugging sections are connected to the body through welding.

[0012] According to some embodiments of the present disclosure, the plugging sections and the bearing sections are in a cylindrical shape, a diameter of each of the bearing sections is larger than a diameter of each of the plugging sections and a diameter of each of the mounting through holes, central axes of the plugging sections are coaxially arranged with central axes of the bearing sections.

[0013] According to some embodiments of the present disclosure, ends of the plugging sections away from the accommodation cavity are exposed from the body.

[0014] According to some embodiments of the present disclosure, the body includes two component plates, a groove is disposed on one side of each of the component plates, the two component plates are overlapped and connected through welding, openings of the two grooves are aligned to form the accommodation cavity, bottom walls of the grooves form the main cavity walls that are parallel to each other.

[0015] Additional aspects and advantages of the present disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present disclosure.BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] FIG. 1 is a three-dimensional schematic diagram of a vapor chamber according to an embodiment of the present disclosure;

[0018] FIG. 2 is a schematic cross-sectional view along a F-F direction of FIG. 1 according to an embodiment of the present disclosure;

[0019] FIG. 3 is a schematic exploded view of a vapor chamber according to an embodiment of the present disclosure; and

[0020] FIG. 4 is a schematic front view of a connecting column according to an embodiment of the present disclosure.REFERENCE NUMERALSbody 100, accommodation cavity 110, main cavity wall 120, mounting through hole 130, component plate 140, groove 141;

[0022] connecting column 200, column section 210, bearing section 220, plugging section 230;

[0023] central axis of the connecting column 300.DETAILED DESCRIPTION

[0024] Embodiments of the present disclosure will be described in detail below. Examples of the embodiments are illustrated in the accompanying drawings, where the same or like reference numerals throughout the figures indicate the same or like elements having the same or like functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present disclosure instead of being construed as limiting the present disclosure.

[0025] In the description of the present disclosure, it should be understood that, descriptions relating to orientation, for example, orientation or positional relationships indicated by “up”, “down” are based on the orientation or positional relationships shown in the accompanying drawings, and are to facilitate the description of the present disclosure and simplify the description only, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the present disclosure.

[0026] In the description of the present disclosure, the meaning of “a plurality of” is two or more. If “first” and “second”, etc. are referred to, it is only for the purpose of distinguishing technical features, and shall not be understood as indicating or implying relative importance or implying the number of the indicated technical features or implying the sequence of the indicated technical features.

[0027] In the description of the present disclosure, unless otherwise explicitly defined, the words such as “set”, “install”, and “connect” should be understood in a broad sense, and those skilled in the art can determine the specific meanings of the above words in the present disclosure in a rational way in combination with the specific contents of the technical solutions.

[0028] Since the production of the vapor chamber requires a vacuuming step, connecting columns 200 are usually provided in the body 100, and the connecting columns 200 can support the two opposite main cavity walls 120 of the accommodation cavity 110 to avoid defects such as dents in the vapor chamber.

[0029] Referring to FIGS. 1 to 4, a large-volume vapor chamber according to an embodiment of the present disclosure includes a body 100 and connecting columns 200, where the body 100 is provided with an accommodation cavity 110, and the accommodation cavity 110 has two main cavity walls 120 arranged oppositely. Each of the connecting columns 200 is disposed on the body 100, and includes a column section 210 and two bearing sections 220, the two bearing sections 220 are connected to both ends of the column section 210 respectively. The column section 210 and the bearing sections 220 are positioned between the two main cavity walls 120, the two bearing sections 220 abut against the two main cavity walls 120 respectively. A cross-sectional area of the column section 210 perpendicular to a central axis of the respective connecting column 200 is less than a cross-sectional area of each of the bearing sections 220 perpendicular to the central axis of the respective connecting column 200.

[0030] The column section 210 and the bearing sections 220 of each of the connecting columns 200 are positioned in the accommodation cavity 110, each connecting column 200 supports the two main cavity walls 120 through the two bearing sections 220. In this way, the bearing sections 220 can maintain sufficient support connection strength with the corresponding main cavity walls 120. Meanwhile, since the cross-sectional area of the column section 210 is smaller than that of the bearing sections 220, the volume of the column section 210 is reduced, thus reducing the space occupied by the connecting columns 200 in the accommodation cavity 110. This ensures that the effective volume of the accommodation cavity 110 is increased, thereby accommodating more capillary structures and liquid thermal-conductive media, thus improving the thermal-conductive property of the vapor chamber.

[0031] Specifically, both the bearing sections 220 and the column section 210 are in a cylindrical shape, a diameter of the column section 210 is smaller than that of each of the bearing sections 220, and the central axes of the bearing sections 220 are coaxially arranged with the central axis of the column section 210. The bearing sections 220 and the column section 210 are both cylindrical and have the coaxial central axes. This coaxial arrangement ensures stable force distribution between the column section 210 and the bearing sections 220, reduces the machining difficulty of the connecting columns 200, and simplifies the structure.

[0032] It will be appreciated that in some embodiments, the bearing sections 220 and the column section 210 can also be in other shapes, such as a prism shape, etc., and those skilled in the art can configure the shape specifically according to actual needs.

[0033] In an embodiment, the diameter of each of the bearing sections 220 is A that satisfies A≥1 mm, and the diameter of the column section 210 is B, where B≥0.5 mm. The above-mentioned structure meets the minimum size requirements of the conventional connecting columns 200, avoids undersized connecting columns 200 that may be insufficient to support the two main cavity walls 120, and saves materials. Specifically, those skilled in the art can specifically configure the diameters of the bearing sections 220 and the column section 210 according to actual needs.

[0034] In an embodiment, a dimension of each of the bearing sections 220 along a direction of the central axis of the respective connecting column 200 is C, and a dimension of the column section 210 along the direction of the central axis of the respective connecting column 200 is D, where D>0.2 (2*C+D). The above-mentioned structure ensures that the column section 210 has sufficient length along the direction of the central axis of the connecting column 200, which is conducive to fully reducing the volume occupied by the connecting column 200 in the accommodating cavity 110 and improving the effective volume of the accommodating cavity 110 to a greater extent. Moreover, the machining difficulty of the column section 210 can be reduced, thus avoiding the risk that the column section 210 is difficult to machine due to being too short.

[0035] In an embodiment, the dimension of each of the bearing sections 220 along the direction of the central axis of the respective connecting column 200 is C, where C>0.2 mm. When applied to a conventional vapor chamber, the above-mentioned structure enables the structural strength of the bearing sections 220 to be sufficient to support the corresponding main cavity wall 120. It will be appreciated that those skilled in the art can specifically select the dimensions of the bearing sections 220 along the direction of the central axis of the connecting column 200 according to actual needs.

[0036] In an embodiment, the main cavity walls 120 are provided with mounting through holes 130, each of the connecting columns 200 further includes two plugging sections 230, the two plugging sections 230 are connected respectively to the two bearing sections 220 at a side away from the column section 210, each of the plugging sections 230 are inserted into a respective one of the mounting through holes 130, and the plugging sections 230 are connected to the body 100 through welding. After being inserted into the mounting through holes 130 through the plugging sections 230, the connecting column 200 is then combined with an area near the mounting through holes 130 through welding, so that the connection strength between the connecting column 200 and the body 100 is relatively high, and the connecting column 200 is not easy to loosen. Moreover, the weld does not appear in the accommodation cavity 110, so as to avoid affecting the internal structure of the accommodation cavity 110. In this way, the welding strength of the connecting columns 200 and the body 100 in the present disclosure is basically the same as that of a conventional vapor chamber.

[0037] In an embodiment, both the plugging sections 230 and the bearing sections 220 are in a cylindrical shape, the diameter of each of the bearing sections 220 is larger than the diameter of each of the plugging sections 230 and the diameter of each of the mounting through holes 130, the central axes of the plugging sections 230 are coaxially arranged with the central axes of the bearing sections 220. The above-mentioned connecting columns 200 are relatively simple in structure, allowing the plugging sections 230 and the mounting through holes 130 to be easily machined, resulting in good manufacturability. In addition, the bearing sections 220 can also seal the ends of the mounting through holes 130 that are close to the accommodating cavity 110, thereby improving the sealing effect of the accommodating cavity 110.

[0038] It will be appreciated that in some embodiments, the plugging sections 230 can also be in other shapes, such as a prism shape, etc., and those skilled in the art can configure the shape specifically according to actual needs.

[0039] In an embodiment, the ends of the plugging sections 230 that are away from the accommodation cavity 110 are exposed from the body 100. During production, the positions of the plugging sections 230 can be directly found from the outside of the body 100 to be welded. The exposed ends of the plugging sections 230 are welded with the body 100 for fixation, to facilitate welding the plugging sections 230 and the body 100.

[0040] In an embodiment, since the accommodating cavity 110 of the vapor chamber is relatively flat and has a large area, a plurality of connecting columns 200 are usually needed to support and fix various places of the main cavity walls 120 of the accommodating cavity 110, to ensure good overall structural strength of the vapor chamber. In actual use, the connecting columns 200 may be arranged irregularly, and may be specifically arranged according to actual needs. Of course, in some cases, the connecting columns 200 can also be arranged regularly and evenly, and those skilled in the art can configure the connecting columns 200 specifically according to actual needs.

[0041] In an embodiment, the body 100 includes two component plates 140, a groove 141 is disposed on one side of each of the component plates 140, the two component plates 140 are overlapped and connected through welding, openings of the two grooves 141 are aligned to form the accommodation cavity 110, bottom walls of the grooves 141 form the main cavity walls 120 that are parallel to each other. The body 100 is formed by welding two component plates 140, the two component plates 140 have grooves 141 respectively, and the production difficulty of the body 100 is relatively low.

[0042] Specifically, one of the two component plates 140 is a cover plate and the other is a base plate. When producing the above-mentioned vapor chamber, the groove 141 is first machined on one side of each of the component plates 140 by machining or etching, and the connecting columns 200 are separately machined. Then the plugging section 230 at one end of each of the connecting columns 200 is inserted into the mounting through hole 130 of the base plate, and the exposed end of the plugging section 230 is welded with the base plate for fixation. Capillary structures are respectively formed in the grooves 141 of the cover plate and the base plate, and then the cover plate and the base plate are superimposed. At this time, the plugging section 230 at the other end of the connecting column 200 is inserted into the mounting through hole 130 of the cover plate, and then the exposed end of this plugging section 230 is welded with the cover plate for fixation. The outer peripheries of the base plate and the cover plate are connected by welding. Then vacuumizing is performed through a liquid injection port of the body 100 and a liquid thermal-conductive medium is injected. After that, the liquid injection port of the body 100 is closed, thereby completing the production of the vapor chamber.

[0043] In an embodiment, the liquid thermal-conductive medium is water. It will be appreciated that in other embodiments, the liquid thermal-conductive medium may also be made of other materials, and those skilled in the art can configure the medium specifically according to actual needs.

[0044] Specifically, the capillary structure can adopt a structure such as copper powder sintering or copper mesh.

[0045] In the description of the disclosure, reference to the terms such as “an embodiment”, “some embodiments”, “exemplary embodiment”, “example”, “specific example” and “some examples” means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms above do not necessarily refer to the same embodiment or example. Furthermore, the particular feature, structure, material, or characteristic described may be combined in any suitable manner in any one or more embodiments or examples.

[0046] The embodiments of the disclosure have been described in detail with reference to the drawings, but the disclosure is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the principle of the disclosure.

Claims

1. A large-volume vapor chamber, comprising:a body provided with an accommodation cavity formed by two main cavity walls arranged oppositely; andconnecting columns disposed on the body, wherein each of the connecting columns comprises a column section and two bearing sections, the two bearing sections are connected to both ends of the column section respectively, the column section and the bearing sections are positioned between the two main cavity walls, the two bearing sections abut against the two main cavity walls respectively, and a cross-sectional area of the column section perpendicular to a central axis of the respective connecting column is less than a cross-sectional area of each of the bearing sections perpendicular to the central axis of the respective connecting column.

2. The large-volume vapor chamber according to claim 1, wherein the bearing sections and the column section are all in a cylindrical shape, a diameter of the column section is smaller than a diameter of each of the bearing sections, and central axes of the bearing sections are coaxially arranged with a central axis of the column section.

3. The large-volume vapor chamber according to claim 2, wherein the diameter of each of the bearing sections is A that satisfies A≥1 mm, and the diameter of the column section is B that satisfies B≥0.5 mm.

4. The large-volume vapor chamber according to claim 2, wherein a dimension of each of the bearing sections along a direction of the central axis of the respective connecting column is C, and a dimension of the column section along the direction of the central axis of the respective connecting column is D, wherein D>0.2 (2*C+D).

5. The large-volume vapor chamber according to claim 2, wherein a dimension of each of the bearing sections along a direction of the central axis of the respective connecting column is C that satisfies C>0.2 mm.

6. The large-volume vapor chamber according to claim 1, wherein each of the main cavity walls is provided with mounting through holes, each of the connecting columns further comprises two plugging sections, the two plugging sections are connected respectively to the two bearing sections at a side away from the column section, the plugging sections are inserted into the mounting through holes respectively, and the plugging sections are connected to the body through welding.

7. The large-volume vapor chamber according to claim 6, wherein the plugging sections and the bearing sections are in a cylindrical shape, a diameter of each of the bearing sections is larger than a diameter of each of the plugging sections and a diameter of each of the mounting through holes, central axes of the plugging sections are coaxially arranged with central axes of the bearing sections.

8. The large-volume vapor chamber according to claim 6, wherein ends of the plugging sections away from the accommodation cavity are exposed from the body.

9. The large-volume vapor chamber according to claim 1, wherein the body comprises two component plates, a groove is disposed on one side of each of the component plates, the two component plates are overlapped and connected through welding, openings of the two grooves are aligned to form the accommodation cavity, bottom walls of the grooves form the main cavity walls that are parallel to each other.

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