Heat sink with irregular shape

Abstract

The present invention relates to a heat dissipation device, which comprises a first shell and a second shell coupled to the first shell. The second shell comprises a main body, which has an inner surface and an outer surface opposite to the inner surface, and also has a first part and a second part, and the first part and the second part have different cross-sectional areas. The heat dissipation device further comprises a plurality of support structures located on the inner surface, and a first capillary structure and a sheet-like capillary structure arranged on the inner surface and arranged in the first part and the second part.

Description

Technical Field

[0001] The invention relates to a heat dissipation device, in particular to a heat dissipation device with a capillary structure. Background Art

[0002] Vapor chambers have higher heat dissipation efficiency than heat pipes. Vapor chambers include a shell and a capillary structure. The shell defines a chamber for containing a coolant. The capillary structure is disposed in the chamber. The shell has an evaporation section to absorb heat energy and a condensation section to dissipate heat energy. The coolant evaporates into a gaseous state in the evaporation section, then changes back to a liquid state in the condensation section and is brought back by the capillary structure to form a coolant circulation.

[0003] Electronic products are becoming thinner and lighter and their internal components are more and more compact. As a result, the vapor chamber must be changed to an irregular shape to avoid interfering with or obstructing nearby electronic components. In this case, various parts of the vapor chamber are required to be reduced in size and the cross-sectional area of ​​these parts is also reduced compared to the cross-sectional area of ​​other parts of the vapor chamber. In the case of a vertically configured vapor chamber and a heat source in thermal contact with the upper part of the vapor chamber, the coolant in the vapor chamber needs to circulate against gravity. However, due to the small cross-sectional area of ​​the capillary structure in these parts, the circulation amount of the coolant per unit time is reduced, so the coolant tends to stagnate in these areas. The flow of the coolant is restricted in a narrower area, which will further lead to the overall circulation of the coolant in the vapor chamber being inhibited, thereby affecting the operating efficiency of the vapor chamber. Summary of the invention

[0004] In view of this, the present invention provides a heat dissipation device having the characteristics of reversible gravity circulation.

[0005] A heat dissipation device disclosed according to an embodiment of the present invention comprises a first shell, a second shell, a first capillary structure and a sheet-like capillary structure. The second shell is coupled to the first shell. The second shell comprises a main body having an inner surface, an outer surface relative to the inner surface, a first part, a second part and a plurality of support structures located on the inner surface. The first part and the second part have different cross-sectional areas. The first capillary structure is disposed on the inner surface and disposed in the first part and the second part. The sheet-like capillary structure is disposed on the first capillary structure and disposed in the first part and the second part. Preferably, the first shell may also comprise a main body having an inner surface, an outer surface relative to the inner surface, a first part and a second part.

[0006] A heat dissipation device disclosed according to an embodiment of the present invention comprises a first shell, a second shell, a first capillary structure and a sheet-like capillary structure. The second shell is coupled to the first shell. The second shell comprises a main body having an inner surface, an outer surface relative to the inner surface, a first part, a second part, a third part and a plurality of support structures located on the inner surface. The first part and the second part have the same cross-sectional area. The third part has a cross-sectional area different from the cross-sectional areas of the first part and the second part. The third part is located between the first part and the second part. The first capillary structure is disposed on the inner surface and is disposed in at least two of the first part, the second part and the third part. The sheet-like capillary structure is disposed on the first capillary structure and is disposed in at least two of the first part, the second part and the third part. Preferably, the first shell may also comprise a main body having an inner surface, an outer surface relative to the inner surface, a first part, a second part and a third part.

[0007] The heat sink disclosed in the aforementioned embodiment of the present invention has a first capillary structure disposed in different parts of the second shell with different cross-sectional areas. The first capillary structure can form an additional coolant circulation path, thereby improving the problem of insufficient coolant circulation in the first capillary structure in the area with a smaller cross-sectional area, and enhancing the circulation of the coolant in the heat sink under reverse gravity, thereby improving the heat dissipation efficiency of the heat sink.

[0008] In addition, the column located on the inner surface of the second shell can maintain the cavity space of the heat dissipation device, reduce the bending of the first shell and the second shell, and avoid deformation of the heat dissipation device.

[0009] The above description of the disclosed contents of the present invention and the following description of the implementation modes are used to demonstrate and explain the spirit and principle of the present invention, and to provide a further explanation of the scope of the patent application of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 FIG. 4 is an exploded view of a temperature vapor chamber according to an embodiment of the present invention.

[0011] Figure 2A According to an embodiment of the present invention Figure 1 A plan view of a second shell of a heat sink.

[0012] Figure 2B Draw Figure 2A Detail of the circled area 2B.

[0013] Figure 2C Draw Figure 2A Detail of the circled area 2C.

[0014] Figure 2D is a plan view of a second shell according to an embodiment of the present invention.

[0015] Figure 3 A plan view of a second shell including two capillary structures according to an embodiment of the present invention is shown.

[0016] Figure 4 A plan view of a second shell including three capillary structures according to an embodiment of the present invention is shown.

[0017] Figure 5A A plan view of a second shell and a capillary structure according to an embodiment of the present invention is shown.

[0018] Figure 5B FIG. 1 is a diagram showing a method of manufacturing a device comprising two capillary structures according to an embodiment of the present invention. Figure 5A Plan view of the second shell.

[0019] Fig. 6A A plan view of a second shell and a capillary structure according to some embodiments is shown.

[0020] Figure 6B The embodiment according to the present invention includes Fig. 6A The capillary structure and the additional capillary structure Fig. 6A The second shell.

[0021] Fig. 7A A plan view of a second shell including two capillary structures according to an embodiment of the present invention is shown.

[0022] Figure 7B A single capillary structure is shown according to an embodiment of the present invention. Fig. 7A Plan view of the second shell.

[0023] Fig. 8A A plan view of a second shell including two capillary structures according to an embodiment of the present invention is shown.

[0024] Figure 8B A plan view of a second shell including a capillary structure according to some embodiments is shown.

[0025] Figure 8C FIG. 1 is a diagram showing an embodiment of the present invention. Figure 8B A cross-sectional view of the second shell.

[0026] Fig.8D A plan view of a second shell including a single capillary structure according to an embodiment of the present invention is shown.

[0027] Fig. 9 A plan view of a second shell including a capillary structure according to an embodiment of the present invention is shown.

[0028] Fig. 10A FIG. 4 is a cross-sectional view of a capillary structure including a plurality of capillary fibers arranged around a central capillary fiber according to an embodiment of the present invention.

[0029] Figures 10B to 10F Draw Fig. 10A Different configurations of capillary structures.

[0030] Figure 10G is a cross-sectional view of a capillary structure including a plurality of capillary fibers according to an embodiment of the present invention.

[0031] Fig. 10H , 10I and 10J shows Figure 10G Different configurations of capillary structures.

[0032] Wherein, the reference numerals are:

[0033] 100 Vacuum Plate

[0034] 110 First Shell

[0035] 120, 120a~120h Second shell

[0036] 121 Main Body

[0037] 122 Support structure

[0038] 123 Inner surface

[0039] 125 External surface

[0040] 130 Flake capillary structure, capillary structure

[0041] Lines 131, 133, 135

[0042] 140, 140c~140d, 140g~140k, 140m~140n, 140p, 141a, 141e, 141f, 141h, 142a, 142e~142f, 143a, 150c, 150d, 170, 180 capillary structure

[0043] 151, 153, 171, 161, 163, 181, 191 First paragraph

[0044] 152, 154, 162, 164, 172, 182, 192 Second paragraph

[0045] 155, 157, 165, 167, S, Sa1, Sa2, Sc, Sd, Se1, Se2, Sf1, Sf2, Sg2, Sg3, E, Ea1, Ea2, Ea3, Ec, Ed, Ee1, Ee2, Ef1, Ef2, Eg2, Eg3 End

[0046] 175 First fixed structure

[0047] 177 Second fixed structure

[0048] 173 Groove

[0049] 193 Paragraph 3

[0050] 1010, 1030 capillary fiber

[0051] 1020 Central capillary fibers, capillary fibers

[0052] 1150 Work Attachments

[0053] 1152 Protruding structure

[0054] 1158 Injection Channel

[0055] Sections 1401, 1402, 1501, 1502

[0056] A1 Part 1

[0057] A11 Vertical Edge

[0058] A2 Part 2

[0059] A21 Horizontal edge, edge

[0060] A21' bottom edge

[0061] A22 top edge

[0062] A23 bottom edge

[0063] A22', A23' outer vertical edge

[0064] A3 Part 3

[0065] A31, A32, A33 Edge

[0066] D, D1, D2 distance

[0067] H Heat Source

[0068] HL1 First side

[0069] HL2 Second Side

[0070] HL3 Third Side

[0071] HL4 Side 4

[0072] L1, L2, L3 Length

[0073] W1, W2 Width

[0074] X Shortest Distance

[0075] Y1, Y2 length DETAILED DESCRIPTION

[0076] The detailed features and advantages of the present invention are described in detail in the following embodiments, and the contents are sufficient to enable anyone skilled in the relevant art to understand the technical content of the present invention and implement it accordingly, and according to the contents disclosed in this specification, the claims and the drawings, anyone skilled in the relevant art can easily understand the relevant purposes and advantages of the present invention. The following examples further illustrate the viewpoints of the present invention in detail, but do not limit the scope of the present invention in any viewpoint.

[0077] It should be understood that the following provides many different embodiments and examples for realizing the different features of the present invention. To simplify the description, the present invention will be described below with specific embodiments or configurations. Of course, these are also only examples and are not intended to limit the present invention. For example, the size of the element is not the range or value mentioned below, but should be appropriately adjusted according to manufacturing, design requirements, conditions and characteristics. In addition, the formation on the first feature or the formation on the second feature described below may include an embodiment that directly contacts the first and second features, and may also include an embodiment that forms additional features between the first and second features so that the first and second features do not directly contact. For purposes of simplicity and clarity, various features may be arbitrarily drawn in different proportions.

[0078] In addition, for ease of description, spatial terms such as "below", "under", "low", "above", "upper", and the like may be used herein to describe the relationship of an element or feature to another element or feature. In addition to the directions shown in the drawings, spatial terms may also be intended to imply the orientation of an element or feature when the device is in use or operation. The device may also be oriented in other ways (rotated 90 degrees or other orientations), and the spatial terms used herein may be interpreted accordingly. In addition, the term "consisting of" may be "comprising" or "composed of".

[0079] Figure 1 FIG. 4 is an exploded view of a heat dissipation device according to an embodiment of the present invention. Figure 2A According to an embodiment of the present invention Figure 1 For the purpose of discussion herein, the heat dissipation device may be considered as a vapor chamber 100. However, the embodiments are not limited thereto, and the embodiments disclosed herein are also applicable to other types of heat dissipation devices without departing from the scope of the present invention.

[0080] See also Figure 1 and 2AThe heat spreader 100 is a substantially flat planar structure, which includes a first shell 110, a second shell 120, a sheet-like wick structure 130, and a wick structure 140, wherein the sheet-like wick structure 130 may also be referred to as a wick structure. The heat spreader 100 is also called a thin heat spreader. The heat spreader 100 has a thickness of less than about 1 mm.

[0081] The first shell 110 and the second shell 120 may be made of, for example, oxygen-free copper, a silicon-containing copper alloy, an aluminum-containing copper alloy, or a combination thereof. Figure 2A , the second shell 120 includes a main body 121 and a plurality of support structures 122. The support structure 122 protrudes from an inner surface 123 of the main body 121 to the first shell 110 and contacts the first shell 110. The support structure 122 can reduce the buckling of the first shell 110 and the second shell 120, maintain the internal space of the cavity, and avoid deformation of the temperature plate 100. In some embodiments, the support structure 122 is columnar and may have a diameter of about 0.4 mm to about 0.8 mm. However, the embodiment is not limited thereto, and support structures 122 of other shapes and sizes may also reduce the buckling of the first shell 110 and the second shell 120.

[0082] Figure 2B Draw Figure 2A In some embodiments, as shown, the support structures 122 are arranged in rows (or columns), and adjacent rows are offset from each other. Figure 2B , the support structures 122 of row 131 are offset from the support structures 122 of row 133. In some embodiments, the distance D1 between the support structures 122 of one row (e.g., row 131 and row 135) is twice the distance between the support structures 122 of adjacent rows (e.g., row 131 and row 133). In some embodiments, the distance D1 is approximately between 3.5 mm and 4.5 mm, and the distance D2 is approximately between 1.5 mm and 2.5 mm. However, the embodiments are not limited in this regard, and the distances D1 and D2 can be based on the needs of the application and design to provide the support structures 122 that can reduce the buckling of the first shell 110 and the second shell 120.

[0083] Figure 2C Draw Figure 2AAs shown, the inner surface 123 includes a first fixing structure 175 along the outer periphery of the second shell 120 and a second fixing structure 177 surrounding the first fixing structure 175 and along the outer periphery of the second shell 120. In some embodiments, a channel or groove 173 is defined between the first fixing structure 175 and the second fixing structure 177. The inner surface of the first shell 110 includes a corresponding protrusion, which can be in the groove 173 to fix the first shell 110 and the second shell 120 to each other.

[0084] In some embodiments, the thickness of the first shell 110 is less than the thickness of the second shell 120. In one example, the thickness of the first shell 110 is about 0.1 mm to about 0.15 mm, and the thickness of the second shell 120 is about 0.2 mm to about 0.35 mm. The thickness of the vapor chamber 100 including the first shell 110 and the second shell 120 is about 0.3 mm to about 0.5 mm. However, the embodiment is not limited in this regard, and the thickness of the first shell 110 may be greater than the thickness of the second shell 120.

[0085] The inner surface 123 is relative to the outer surface 125 of the body 121. The outer surface 125 forms the outer surface of a portion of the temperature vapor chamber 100 and is substantially planar. The first shell 110 can be connected to the body 121 of the second shell 120 by welding, soldering, brazing or diffusion bonding. The second shell 120 has a first portion (or wide portion) A1 and a second portion (or narrow portion) A2. The first portion A1 has a width W1, and the second portion A2 has a width W2. The width W1 is greater than the width W2. The first portion has a length L1, and the second portion has a length L2. The sum of the lengths L1 and L2 is the length L3, which is the length of the longest side of the temperature vapor chamber 100. It is understandable that the first portion A1 and the second portion A2 may have different cross-sectional areas. In one embodiment, the width W1 of the first portion A1 is approximately 80 millimeters (mm), and the width W2 of the second portion A2 is approximately 18 millimeters. The length L1 is about 90 mm to about 100 mm, and the length L3 is about 120 mm to about 130 mm. However, the embodiment is not limited thereto and may vary according to application and design requirements. In other embodiments, the width W2 of the second portion A2 may be less than or equal to half of the width W1 of the first portion A1. In some other embodiments, the width W2 of the second portion A2 may be less than or equal to one third of the width W1 of the first portion A1.

[0086] The sheet-like capillary structure 130 is disposed between the first shell 110 and the second shell 120. The sheet-like capillary structure 130 includes, for example, a copper mesh. The sheet-like capillary structure 130 contacts the first shell 110 and the capillary structure 140. The sheet-like capillary structure 130 provides a flow path for the coolant circulating in the vapor chamber 100.

[0087] The capillary structure 140 may be or include a single helical structure formed by twisting copper wires. The capillary structure 140 is located in the gap between the support structures 122 and contacts the second shell 120 of the inner surface 123, thereby contacting the second shell 120. Although the capillary structure 140 has been disclosed as a bundle of wires wound into a helical structure, the embodiments are not limited thereto. In other embodiments, the capillary structure 140 may be or include a copper powder sintered capillary structure of copper wires interlaced or twisted together. In some other embodiments, the capillary structure 140 may be or include a plurality of bundles of wires bundled or wound together. In other embodiments, the capillary structure 140 includes a mesh capillary structure or a groove capillary structure.

[0088] In one embodiment and as shown in the figure, the capillary structure 140 is a longitudinally extending structure and is relatively straightly arranged near the upper ends of the first part A1 and the second part A2 (without any bends or bends). One end S of the capillary structure 140 is located in the second part A2 and near (but not in contact with) a lateral edge A21 of the second part A2. The lateral edge A21 is the outer edge of the second part A2, and therefore the outer edge of the second shell 120. In some embodiments, the end S of the capillary structure 140 may not contact the edge A21 of the second part A2, and may be spaced from the edge A21 of the second part A2. The other longitudinal opposite ends E of the capillary structure 140 are located in the first part A1. The heat source H can be attached to the outer surface of the first shell 110 using thermal conductive paste or other existing technologies, so that the heat source H is attached to the outer surface of the vapor chamber 100. FIG. 2 shows a vertical projection (dashed box) of the heat source H to the second shell 120. The heat source H is shown as a square for the sake of illustration. However, it is understood that the shape of the heat source H is not limited to a square, but can be any desired shape. The end E of the capillary structure 140 is separated from the heat source H by a distance D (in the vertical direction as shown in FIG. 2 ). The distance D may be about 18.5 mm, but the embodiment is not limited thereto. In some embodiments, the end E of the capillary structure 140 may overlap the heat source H, or the end E may coincide with the boundary or edge of the heat source H. It is understood that the distance D between the end E of the capillary structure 140 and the heat source H is not particularly limited to any specific value, but can be adjusted according to the size or shape of the heat spreader and according to user and design requirements.

[0089] The temperature vapor chamber 100 includes a working attachment 1150, which is formed by a protruding structure 1152 of the second shell 120 and a corresponding protrusion of the first shell 110. The working attachment 1150 includes an injection channel 1158 formed by the first shell 110 and the second shell 120. The injection channel 1158 is fluidically connected to the inner cavity formed by the inner surface 123 of the second shell 120 of the temperature vapor chamber 100 and the inner surface of the first shell 110. The working attachment 1150 is used to fill the working fluid into the inner cavity of the temperature vapor chamber 100 and to extract air from the inner cavity. In some embodiments, the working attachment 1150 is located at the center of the width W1. However, in other embodiments, the working attachment 1150 is located at a position deviated from the central position, or is located on other sides or surfaces of the temperature vapor chamber 100.

[0090] Figure 2D FIG. 1 is a plan view of the second shell 120 according to an embodiment of the present invention. Figure 2A As shown in the figure, the capillary structure 140 is located near the lower end of the second portion A2. The distance D between the end E of the capillary structure 140 and the heat source H can be reduced. The capillary structure 140 is spaced apart from the lateral edge A21 of the second portion A2.

[0091] In some embodiments, the vapor chamber 100 may include a plurality of capillary structures 140 . Figure 3 A plan view of a second shell 120a including two capillary structures 141a and 142a according to an embodiment of the present invention is shown. The second shell 120a may be used instead of Figure 1 The second shell 120a of the vapor chamber 100 of FIG. 2 may be similar to the second shell 120 of FIG. 2 in some aspects, which can be understood by referring to the accompanying drawings, wherein the same reference numerals represent the same components and will not be described in detail.

[0092] As shown in the figure, the capillary structures 141a and 142a are longitudinally extending structures and are straight structures (without bends or curves), and are disposed on the second shell 120a. The capillary structures 141a and 142a are located in the gap between the support structures 122 and contact the inner surface 123 of the second shell 120a. In one embodiment, the capillary structures 141a and 142a may have different lengths. For example, as shown in the figure, the capillary structure 141a is longer than the capillary structure 142a. The capillary structures 141a and 142a are in contact with each other along their longitudinal edges and are arranged side by side. One end Sa1 of the capillary structure 141a is located in the second part A2 and contacts the edge A21 of the second part A2. The longitudinal opposite end Ea1 of the capillary structure 141a is located in the first part A1 and is spaced apart from the heat source H (such as Figure 3 One end Sa2 of the capillary structure 142a is located in the second portion A2, while the longitudinally opposite end Ea2 of the capillary structure 142a is located in the first portion A1 and is spaced apart from the heat source H (as shown in FIG. 1 ). Figure 3 As shown, the end Ea1 and the end Ea2 overlap with each other (for example, they are located at the same distance from the edge A21). However, in other embodiments, the end Ea1 and the end Ea2 may not overlap with each other in the first portion A1 (for example, they are located at different distances from the edge A21).

[0093] Compared with the embodiment of FIG. 2 , Figure 3 The second shell 120a includes an additional capillary structure 142a extending from the second portion A2 toward the heat source H. The capillary structure 142a can improve the circulation of the coolant in the vapor chamber 100 against gravity, for example. Therefore, the heat dissipation efficiency of the vapor chamber 100 is improved.

[0094] Figure 4 The second shell 120b is a plan view of a second shell 120b including three capillary structures 141a, 142a and 143a according to an embodiment of the present invention. Figure 1 The second shell 120b may be similar to the second shells 120 and 120a of FIGS. 2 and 3 in some aspects, which can be understood by referring to the drawings, wherein the same reference numerals represent the same components and will not be described in detail.

[0095] See also Figure 4 , the capillary structures 141a, 142a and 143a are each a longitudinally extending structure and a straight structure (without bends or curves), and are disposed on the second shell 120b. The capillary structures 141a, 142a and 143a are located in the gaps of the support structure 122 and contact the inner surface 123 of the second shell 120b. In one embodiment, the capillary structures 141a, 142a and 143a have different lengths. For example, as shown in the figure, the capillary structure 141a is longer than the capillary structures 142a and 143a. The capillary structures 141a and 142a are in contact with each other along their longitudinal edges and are arranged side by side. The capillary structure 143a is spaced apart from the capillary structures 141a and 142a (e.g., vertically, as shown in FIG. 1 ). Figure 4As shown). An end Sa1 of the capillary structure 141a is located in the second portion A2 and contacts an edge A21 of the second portion A2. A longitudinally opposite end Ea1 of the capillary structure 141a is located in the first portion A1 and is spaced apart from the heat source H (as indicated by a dotted line). An end Sa2 of the capillary structure 142a is located in the second portion A2, and a longitudinally opposite end Ea2 of the capillary structure 142a is located in the first portion A1 and is spaced apart from the heat source H. As shown, the end Ea1 and the end Ea2 coincide with each other (e.g., are located at the same distance from the edge A21). However, in other embodiments, the end Ea1 and the end Ea2 may not coincide. An end Ea3 of the capillary structure 143a is colinear (e.g., aligned) with the heat source H on the outer surface of the first shell 110, and the other end Sa3 of the capillary structure 143a is located in the first portion A1 and contacts a vertical edge A11 of the first portion A1. As shown, the capillary structure 143a is completely located in the first portion A1. The horizontal distance between the end Ea3 of the capillary structure 143a and the heat source H is less than the vertical distance between the end Ea2 of the capillary structure 142a and the heat source H. Although the capillary structures 141a, 142a and 143a are shown as having different lengths, the embodiment is not limited thereto. In some embodiments, the capillary structures 142a and 143a may have the same length. In other embodiments, the end Sa1 of the capillary structure 141a and the end Sa2 of the capillary structure 142a may be located at the same distance from the edge A21.

[0096] Compared to Figure 3 An embodiment of Figure 4 The second shell 120b includes an additional capillary structure 143a extending from the edge of the first portion A1 toward the heat source H. The capillary structure 143a can, for example, further improve the circulation of the coolant in the vapor chamber 100 against gravity. Therefore, the heat dissipation efficiency of the vapor chamber 100 can be further improved.

[0097] Figure 5A A plan view of a second shell 120c and a capillary structure 140c according to an embodiment of the present invention is shown. The second shell 120c can be used to replace Figure 1 The second shell 120c may be similar to the second shell 120 of FIG. 2 in some aspects, which can be understood by referring to the accompanying drawings, wherein the same reference numerals represent the same components and will not be described in detail.

[0098] As shown, the capillary structure 140c is disposed in the second shell 120c and has at least one bend. The capillary structure 140c is located in the gap between the support structures 122 and contacts the second shell 120c of the inner surface 123. One end Sc of the capillary structure 140c is located in the second portion A2 and contacts the edge A21 of the second portion A2, and the opposite end Ec of the capillary structure 140c is located in the first portion A1 and overlaps at least a portion of the heat source H (indicated by a dotted line) attached to the outer surface of the first shell 110. In one example, as shown, the capillary structure 140c at least partially overlaps one side or one end of the heat source H near the capillary structure 140c. For ease of explanation, it is assumed that the heat source H may be substantially rectangular and include a first side HL1 and a second side HL2 opposite to each other and a third side HL3 and a fourth side HL4 opposite to each other. The first side HL1 is closer to the edge A21. The fourth side HL4 is closer to the capillary structure 140c. The capillary structure 140 c overlaps the fourth side HL4 of the heat source H.

[0099] As shown in the figure, the capillary structure 140c includes a segment 1401 and a segment 1402, which have a length Y1 and a length Y2 respectively. The segment 1401 and the segment 1402 are connected to each other and form an angle (greater than 0° and less than 180°). The total length of the capillary structure 140c is the sum of the length Y1 and the length Y2. In one example, the total length may be about 118 mm, but the present invention is not limited thereto. In other embodiments, the total length of the capillary structure 140c may be increased or decreased as long as the capillary structure 140c can be accommodated in the temperature plate 100. In one embodiment, the extent of the capillary structure 140c may be equal to the shortest distance X between the end Sc of the capillary structure 140c and the heat source H. Further, the shortest distance X is the distance between the end Sc and the point on the heat source H closest to the end Sc projected vertically on the inner surface 123. For example, the distance X is about 105 mm. When the total length of the capillary structure 140c is equal to or less than about 126 mm, the heat dissipation efficiency of the vapor chamber including the capillary structure 140c is relatively high. The capillary structure 140c reduces the distance that the coolant must circulate in the vapor chamber 100. The length of the capillary structure 140c is not particularly limited, but can be adjusted according to user and design requirements.

[0100] Figure 5BA plan view of a second shell 120c including a capillary structure 140c and a capillary structure 150c according to an embodiment of the present invention is shown. The shape and size (or other configuration) of the capillary structure 150c are similar to the capillary structure 140c. The capillary structure 150c contacts the bottom side of the capillary structure 140c. As shown in the figure, the capillary structure 150c is located in the gap between the support structures 122 and contacts the second shell 120c of the inner surface 123. An end 155 of the capillary structure 150c is located in the second portion A2 and contacts the edge A21 of the second portion A2, and an opposite end 157 of the capillary structure 150c is located in the first portion A1 and overlaps with at least a portion of the heat source H (indicated by a dotted line) attached to the outer surface of the first shell 110. As shown in the figure, the end 155 and the end 157 of the capillary structure 150c are aligned with the end Sc and the end Ec of the capillary structure 140c.

[0101] In some embodiments, the capillary structure 150c overlaps the same side of the heat source H as the capillary structure 140c. In other embodiments, the capillary structure 150c and the capillary structure 140c may overlap on different sides of the heat source H. The amplitude of the capillary structure 150c may be equal to the amplitude of the capillary structure 140c.

[0102] The capillary structure 150c includes a segment 1501 and a segment 1502, and has a length Y1 and a length Y2 respectively. The segment 1501 and the segment 1502 are connected to each other and form an angle (greater than 0° and less than 180°), which is the same as the angle between the segment 1401 and the segment 1402 of the capillary structure 140c. However, in other embodiments, the lengths of the segment 1501 and the segment 1502 may be different from the lengths of the segment 1401 and the segment 1402. In some embodiments, the length of the segment 1501 is less than the length of the segment 1401. In some other embodiments, the length of the segment 1502 may be longer than the length of the segment 1402.

[0103] The position of the capillary structure in the temperature uniform plate is not particularly limited. Fig. 6A A plan view of the second shell 120d and the capillary structure 140d according to some embodiments is shown. The second shell 120d can be used to replace Figure 1 The second shell 120d may be similar to the second shell 120c in some aspects. Figure 5A , which can be understood by referring to the accompanying drawings, in which like numbers represent like parts and thus will not be described in detail.

[0104] See also Fig. 6A, the capillary structure 140d has at least one bend and is disposed on the second shell 120d. The capillary structure 140d is located in the gap between the support structures 122 and contacts the second shell 120d on the inner surface 123. One end Sd of the capillary structure 140d is located in the second portion A2, and the other opposite end Ed of the capillary structure 140d is located in the first portion A1 and overlaps with the heat source H attached to the outer surface of the first shell 110. For ease of explanation, it is assumed that the heat source H overlaps with the outer surface of the first shell 110. Figure 5A The capillary structure 140d overlaps the first side HL1. As shown in the figure, the segment with length Y1 in the capillary structure 140d contacts the upper edge A22 of the lower part of the second portion A2.

[0105] The capillary structure 140d has a Figure 5A The capillary structure 140c has a relatively short length. The total length of the capillary structure 140d is approximately 108 mm, but the present invention is not limited thereto. In other embodiments, the total length of the capillary structure 140d may be increased or decreased as long as the capillary structure 140d can be accommodated in the temperature homogenizing plate 100. The amplitude of the capillary structure 140d may be equal to the shortest distance X between the capillary structure 140d and the end Sd and the heat source H. Further, the shortest distance X is the distance vertically projected on the inner surface 123 from the end Sd to the point on the heat source H closest to the end Sd. For example, the shortest distance X is approximately 100 mm. When the total length of the capillary structure 140d is equal to or less than approximately 120 mm, the heat dissipation efficiency of the temperature homogenizing plate including the capillary structure 140d is relatively high.

[0106] Figure 6B A second shell 120d including a capillary structure 140d and a capillary structure 150d according to an embodiment of the present invention is shown. The shape and size (or other configuration) of the capillary structure 150d are similar to the capillary structure 140d. The capillary structure 150d contacts the upper side of the capillary structure 140d. The capillary structure 150d is located in the gap between the support structures 122 and contacts the second shell 120d of the inner surface 123.

[0107] The end 165 of the capillary structure 150d is located in the second portion A2 and is spaced from the edge A21 of the second portion A2, and the opposite end 167 of the capillary structure 150d is located in the first portion A1 and overlaps at least a portion of the heat source H (indicated by a dotted line) attached to the outer surface of the first shell 110. As shown in the figure, the end 165 and the end 167 of the capillary structure 150d are aligned with the end Sd and the end Ed of the capillary structure 140d.

[0108] In some embodiments, the side of the capillary structure 150d overlapping the heat source H also overlaps the capillary structure 140d. In other embodiments, the capillary structure 150d and the capillary structure 140d may overlap on different sides of the heat source H. The amplitude of the capillary structure 150d is the same as the amplitude of the capillary structure 140d.

[0109] The segments 1501 and 1502 of the capillary structure 150d have lengths Y1 and Y2, respectively, and are connected to each other at an angle (greater than 0° and less than 180°), which is the same as the angle formed by the segments 1401 and 1402 of the capillary structure 140d. However, in other embodiments, the lengths of the segments 1501 and 1502 may be different from the lengths of the segments 1401 and 1402. In some embodiments, the length of the segment 1501 may be less than the length of the segment 1401. In some other embodiments, the length of the segment 1502 may be longer than the length of the segment 1402.

[0110] See also Figure 5A 6, the capillary structure 140d of FIG. 6 is shorter than Figure 5A The capillary structure 140c reduces the path for the coolant to circulate in the temperature vapor chamber 100. The length of the capillary structure 140d is not particularly limited and can be adjusted according to user and design requirements.

[0111] According to some embodiments, the shapes of the first shell and the second shell are not particularly limited. Fig. 7A A plan view of a second shell 120e including capillary structures 141e and 142e according to an embodiment of the present invention is shown. The second shell 120e can be used in a device including capillary structures 141e and 142e. Figure 1 In a temperature equalizing plate having a first shell 110 and a sheet-like capillary structure 130, the shapes of the first shell and the sheet-like capillary structure need to correspond to the shape of the second shell 120e, or be slightly larger.

[0112] like Fig. 7A As shown, the second shell 120e is substantially H-shaped and has a first portion A1, a second portion A2 and a third portion A3. The third portion A3 is located between the first section A1 and the second section A2. The first portion A1 has a width W1, the second portion A2 has a width W2, and the third portion A3 has a width W3. The width W1 is equal to the width W2, and the width W3 is less than the width W1. However, in other embodiments, the widths W1 and W2 may be different but both are greater than the width W3. The capillary structures 141e and 142e are disposed on the second shell 120e. The capillary structures 141e and 142e are each slightly L-shaped and are located in the gap between the support structures 122, and contact the inner surface 123 of the second shell 120e.

[0113] The capillary structure 141e includes a first section 151 disposed in the first portion A1, the second portion A2, and the third portion A3. The capillary structure 141e includes a second section 152 disposed in the third portion A3, and the second section 152 is at an angle relative to the first section 151. The first section 151 is connected to the second section 152 in the third portion A3. In one example, the first section 151 is perpendicular to the second section 152. However, the embodiment is not limited thereto, and the first section 151 can be connected to the second section 152 at an angle greater than or less than 90°.

[0114] The capillary structure 142e includes a first section 153 disposed in the first portion A1, the second portion A2, and the third portion A3. The capillary structure 142e includes a second section 154 disposed in the third portion A3, and the second section 154 is at an angle relative to the first section 153. The first section 153 is connected to the second section 154 in the third portion A3. In one example, the first section 153 is perpendicular to the second section 154. However, the embodiment is not limited thereto, and the first section 153 may be connected to the second section 154 at an angle greater than or less than 90°. The first section 151 of the capillary structure 141e and the first section 153 of the capillary structure 141e are in contact with each other.

[0115] The first section 151 includes an end Ee1 of the capillary structure 141e located at the first portion A1. The end Ee1 overlaps the heat source H attached to the outer surface of the first shell 110. The first section 153 includes an end Ee2 of the capillary structure 142e located at the first portion A1. The end Ee2 overlaps the heat source H attached to the outer surface of the first shell 110.

[0116] The second section 152 includes an end Se1 of the capillary structure 141e located at the second portion A2. The second section 154 includes an end Se2 of the capillary structure 142e located at the second portion A2.

[0117] As shown in the figure, the end Se1 of the capillary structure 141e is located near an upper edge A22 of the second portion A2 (non-contacting), and the end Se2 of the capillary structure 142e is located near a lower edge A23 of the second portion A2 relative to the upper edge A22. The second sections 152 and 154 are disposed near an edge A21 of the second portion A2. The edge A21 is connected to the upper edge A22 and the lower edge A23. In other embodiments, the end Se1 may contact the upper edge A22, the end Se2 may contact the lower edge A23, and the second sections 152 and 154 may contact the edge A21.

[0118] Some embodiments may include a single capillary structure instead of the two capillary structures 141 e and 142 e described above. Figure 7BA plan view of a second shell 120e including a single capillary structure 170 according to an embodiment of the present invention is shown. The capillary structure 170 includes a first section 171 disposed in the first portion A1, the second portion A2, and the third portion A3. The capillary structure 170 includes a second section 172 disposed in the third portion A3, and the second section 172 is at an angle relative to the first section 171. The first section 171 is connected to the second section 172 in the third portion A3. In one example, the first section 171 is perpendicular to the second section 172. However, the embodiment is not limited thereto, and the first section 171 can be connected to the second section 172 at an angle greater than 0° or less than 90°.

[0119] The first section 171 includes an end Ee1 of the capillary structure 170 located in the first portion A1. The end Ee1 overlaps with the heat source H attached to the outer surface of the first shell 110. The second section 172 includes an end Se1 of the capillary structure 170 located in the second portion A2. The second section 172 includes an end Se2 in the second portion A2 opposite to the end Se1. The second section 172 is disposed near an edge A21 of the second portion A2.

[0120] Fig. 8A A plan view of a second shell 120f including capillary structures 141f and 142f according to an embodiment of the present invention is shown. The second shell 120f can be used in a device including capillary structures 141f and 142f. Figure 1 In a temperature equalizing plate having a first shell 110 and a sheet-like capillary structure 130, the shapes of the first shell and the sheet-like capillary structure need to correspond to the shape of the second shell 120f, or be slightly larger.

[0121] The first portion A1 of the second shell 120f is disposed between the second portion A2 and the third portion A3. The first portion A1 has a width W1, and the second portion A2 and the third portion A3 each have a width W2. The width W1 is greater than the width W2. In other embodiments, the second portion A2 and the third portion A3 may have different widths, but both are still smaller than the width W1. The capillary structures 141f and 142f are disposed on the second shell 120f. The capillary structures 141f and 142f are each L-shaped and are located in the gap between the support structures 122 and contact the inner surface 123 of the second shell 120f.

[0122] The capillary structure 141f includes a first section 161 disposed in the first portion A1. The capillary structure 141f includes a second section 162 disposed in the first portion A1 and the second portion A2, and the second section 162 is at an angle relative to the first section 161. The first section 161 is connected to the second section 162 in the first portion A1. In one example, the first section 161 is perpendicular to the second section 162. However, the embodiment is not limited thereto, and the first section 161 can be connected to the second section 162 at an angle greater than or less than 90°.

[0123] The capillary structure 142f includes a first section 163 disposed in the first portion A1. The capillary structure 142f includes a second section 164 disposed in the first portion A1 and the third portion A3, and the second section 164 is at an angle relative to the first section 163. The first section 163 is connected to the second section 164 in the first portion A1. In one example, the first section 163 is perpendicular to the second section 164. However, the embodiment is not limited thereto, and the first section 163 can be connected to the second section 164 at an angle greater than or less than 90°. The first section 161 of the capillary structure 141f and the first section 163 of the capillary structure 142f are in contact with each other.

[0124] The first section 161 includes an end Ef1 of the capillary structure 141f located in the first portion A1. The end Ef1 overlaps the heat source H attached to the outer surface of the first shell 110. The first section 163 includes an end Ef2 of the capillary structure 142f located in the first portion A1. The end Ef2 overlaps the heat source H attached to the outer surface of the first shell 110.

[0125] The second section 162 includes an end Sf1 of the capillary structure 141f located in the second portion A2. The second section 164 includes an end Sf2 of the capillary structure 142f located in the third portion A3.

[0126] As shown in the figure, the end Sf1 of the capillary structure 141f is located near an edge A32 of the second portion A2 (non-contact), and the end Sf2 of the capillary structure 142f is located near an edge A33 of the third portion A3 relative to the edge A32 (non-contact). The second sections 162 and 164 are arranged on the second shell 120f to form or define the first portion A1, the second portion A2 and the third portion A3 of the second shell 120f near an edge A31 (but not in contact). The edge A31 is connected to the edge A32 and the edge A33. In other embodiments, the end Sf1 may contact the edge A32, the end Sf2 may contact the edge A33, and the second sections 162 and 164 may contact the edge A31.

[0127] When the vapor chamber is used vertically (for example, when the position of the heat source H is higher than the position of the second portion A2 and the third portion A3), the cooling liquid in the vapor chamber evaporates and turns into vapor, while absorbing the heat generated by the heat source H. The cooling liquid (in the vapor state) flows to the second portion A2 and the third portion A3 and turns back into liquid, and the cooling liquid can flow to the first portion A1 through the capillary structures 141f and 142f. This configuration can reduce the temperature difference between the first portion A1 and the second portion A2 and the third portion A3 by about 4 to 15 degrees Celsius. The cooling liquid circulates continuously between the first portion A1, the second portion A2, and the third portion A3, thereby taking away the heat generated by the heat source H.

[0128] Figure 8BA plan view of a second shell 120g including a capillary structure 142f is shown according to some embodiments. Figure 8C The second shell 120g is shown along Figure 8B The second shell 120g may be similar in some aspects to Fig. 8A The second shell 120f can be understood by referring to the accompanying drawings, in which like numbers represent like parts and will not be described in detail.

[0129] like Figure 8B , the second shell 120g includes a single capillary structure 142f. The capillary structure 141f does not exist in this example. The capillary structure 142f is spaced apart from the edge A31. In some embodiments, the second section 164 is disposed in the middle area of ​​the third portion A3. In some embodiments, as shown in the figure, the first section 163 of the capillary structure 142f is located at the center of the first portion A1. However, the embodiment is not limited thereto, and in some other embodiments, the first section 163 may also be located at a position offset from the center of the first portion A1.

[0130] In some embodiments, the second shell 120g may also include a capillary structure 141f ( Fig. 8A ) but does not have the capillary structure 142f; in this case, the capillary structure 141f may be spaced apart from the edge A31, and the second section 162 of the capillary structure 141f may be disposed in the middle region of the second portion A2, and the first section 161 ( Fig. 8A ) may be located at the center of the first portion A1, but in some other embodiments, the first segment 161 may also be located at a position offset from the center of the first portion A1.

[0131] Some embodiments may include a single capillary structure instead of the two capillary structures 141f and 142f described above. Fig.8D A plan view of a second shell 120f including a single capillary structure 180 according to an embodiment of the present invention is shown. The capillary structure 180 includes a first section 181 disposed in the first portion A1. The capillary structure 180 includes a second section 182 disposed in the first portion A1, the second portion A2, and the third portion A3, and the second section 182 is at an angle relative to the first section 181. The first section 181 is connected to the second section 182 located in the first portion A1. In one example, the first section 181 is perpendicular to the second section 182. However, the embodiment is not limited thereto, and the first section 181 can be connected to the second section 182 at an angle greater than 0° or less than 90°.

[0132] The first section 181 includes an end Ef1 of the capillary structure 180 located in the first portion A1. The end Ef1 overlaps the heat source H attached to the outer surface of the first shell 110. The second section 182 includes an end Sf1 of the capillary structure 180 located in the second portion A2, and also includes an end Sf2 located in the third portion A3 and opposite to the end Sf1. The second section 182 is disposed near (but not in contact with) the edge A31 that forms or defines the first portion A1, the second portion A2, and the third portion A3 of the second shell 120f. Although not shown, Fig. 8A , 8B The second shell 120f of 8D may include Figure 2A A working accessory similar to the working accessory 1150 can be provided, and the working accessory can be located at any desired position on the side of the second shell 120f.

[0133] The shape of the capillary structure is not particularly limited to any specific shape. In some embodiments, the capillary structure may be a sawtooth shape or any other desired suitable shape.

[0134] Fig. 9 A plan view of a second shell 120h including a capillary structure 141h according to an embodiment of the present invention is shown. The second shell 120h can be used in a device including a plurality of capillary structures 141h and a plurality of capillary structures 141h. Figure 1 In a temperature equalizing plate having a first shell 110 and a sheet-like capillary structure 130, the shapes of the first shell and the sheet-like capillary structure need to correspond to the shape of the second shell 120h, or be slightly larger.

[0135] like Fig. 9 , the second shell 120h is slightly U-shaped and has a horizontal first portion A1 and a vertical second portion A2 and a third portion A3. The first portion A1 is located between the second portion A2 and the third portion A3. The first portion A1 has a width W1, the second portion A2 has a width W2, and the third portion A3 has a width W3. The width W2 is equal to the width W3, and the width W1 is smaller than the width W2 and the width W3. However, in other embodiments, the width W2 and the width W3 may be different, but both are still greater than the width W1. The capillary structure 141h is disposed in the second shell 120h and in the gap between the support structures 122. The capillary structure 141h contacts the inner surface 123 of the second shell 120h.

[0136] The capillary structure 141h includes a first section 191 horizontally disposed in the first portion A1, the second portion A2, and the third portion A3. The capillary structure 141h also includes two vertical sections: a second section 192 disposed in the second portion A3, and a third section 193 disposed in the third portion A3. The first section 191, the second section 192, and the third section 193 are all straight structures without any bends. The second section 192 and the third section 193 are at an angle relative to the first section 191. The second section 192 and the third section 193 are connected to the first section 191 in the second portion A2 and the third portion A3, respectively. In one embodiment, as shown in the figure, the second section 192 and the third section 193 are perpendicular to the first section 191. However, the embodiment is not limited in this respect, and the second section 192 and the third section 193 can also be connected to the first section 191 at an angle greater than 0° or less than 90°.

[0137] The first section 191 includes an end Sg2 located at the second portion A2, and the end Sg2 is located near an outer vertical edge A22' of the second portion A2. The first section 191 includes an end Sg3 located at the third portion A3 and opposite to the end Sg2, and the end Sg3 is located near an outer vertical edge A23' of the third portion A3. The first section 191 is located near the bottom edge A21' of the first portion A1, the second portion A2, and the third portion A3.

[0138] The second segment 192 includes an end Eg2 located at the second portion A2. The end Eg2 is connected to the end of the first segment 191 relative to the second segment 192. Similarly, the third segment 193 includes an end Eg3 located at the third portion A3. The end Eg3 is connected to the end of the first segment 191 relative to the third segment 193.

[0139] As shown, the end Eg2 overlaps the heat source H attached to the outer surface of the first shell 110 and is on the second portion A2. However, in other embodiments, the end Eg3 may overlap the heat source H attached to the outer surface of the first shell 110 and be on the third portion A3. A working attachment 1150 may be provided at the third portion A3. However, in other embodiments, the working attachment 1150 may also be located at a desired suitable edge on the first portion A1 or the second portion A2.

[0140] Fig. 10A 1 is a cross-sectional view of a capillary structure including a plurality of capillary fibers 1010 surrounding a central capillary fiber 1020. In one embodiment, the capillary fibers 1010 and 1020 include copper. However, the capillary fibers 1010 and / or 1020 may include other materials that can allow condensate to flow through the capillary structure formed by the capillary fibers 1010 and 1020 through capillary forces.

[0141] Figures 10B to 10FCapillary structures 140g, 140h, 140i, 140j, and 140k of different configurations including capillary fibers 1010 surrounding a central capillary fiber 1020 are shown. Fig. 10B , the capillary structure 140g includes capillary fibers 1010 twisted into a bundle in a spiral shape (for example, forming a structure similar to a braided rope). In FIG. 10C , the capillary structure 140h includes capillary fibers 1010 that are twisted and then twisted into a bundle in a spiral shape. Fig. 10D The capillary structure 140i includes capillary fibers 1010 extending longitudinally and arranged side by side.

[0142] At Fig.10E and 10F In the embodiment, the capillary structures 140j and 140k are formed by twisting the spiral capillary fibers 1010 into bundles. Due to the difference in the twist angles of the windings of the capillary structures 140j and 140k, the capillary structures 140j and 140k have different tensions.

[0143] In some other embodiments, the capillary structures 140g, 140h, 140i, 140j, and 140k may not have the central capillary fiber 1020.

[0144] Figure 10G 1 is a cross-sectional view of a capillary structure including a plurality of capillary fibers 1030 arranged in a circular manner. In one embodiment, the capillary fibers 1030 include copper. However, the capillary fibers 1030 may include other materials that can allow condensate to flow through the capillary structure formed by the capillary fibers 1030 through capillary forces.

[0145] Fig. 10H The capillary structure 140m is shown, in which the capillary fibers 1030 are twisted together relatively loosely. Fig.10I The capillary structure 140n is shown, and the capillary fibers 1030 are arranged longitudinally. Fig.10J The capillary structure 140p is shown, in which the capillary fibers 1030 are twisted together or paired to form a woven structure. In some other embodiments, the capillary fibers 1010, 1020 and / or 1030 can be flattened.

[0146] Although the present invention is disclosed in the above embodiments, it is not intended to limit the present invention. Without departing from the spirit and scope of the present invention, all changes and modifications are within the scope of patent protection of the present invention. Please refer to the attached claims for the scope of protection defined by the present invention.

Claims

1. A heat dissipation device, characterized in that: Include: a first shell; A second shell is coupled to the first shell, and the second shell comprises: A main body having an inner surface, an outer surface, a first portion, a second portion, and a plurality of supporting structures, wherein the outer surface is relative to the inner surface, the first portion and the second portion have different cross-sectional areas, and the supporting structures are located on the inner surface; and A sheet-like capillary structure, the sheet-like capillary structure is disposed in the first portion and the second portion; A first capillary structure is a structure extending horizontally or vertically and is disposed on the inner surface, and two ends of the structure are respectively connected to the first portion and the second portion. The first capillary structure does not completely cover the sheet-like capillary structure.

2. The heat dissipation device according to claim 1, characterized in that: The first portion and the second portion have different widths.

3. The heat dissipation device according to claim 1, characterized in that: The invention also comprises a second capillary structure which is arranged on the inner surface and in the first part and the second part.

4. The heat dissipation device according to claim 3, characterized in that: The first capillary structure and the second capillary structure have different lengths.

5. The heat dissipation device according to claim 3, characterized in that: The first capillary structure and the second capillary structure are in contact with each other along their respective longitudinal edges.

6. The heat dissipation device according to claim 3, characterized in that: The first capillary structure and the second capillary structure are spaced apart from a heat source located on the outer surface of the second shell.

7. The heat dissipation device according to claim 3, characterized in that: A third capillary structure is also included, which is arranged on the inner surface and in the first part.

8. The heat dissipation device according to claim 7, characterized in that: The first capillary structure, the second capillary structure and the third capillary structure have different lengths.

9. The heat dissipation device according to claim 7, characterized in that: The first capillary structure and the second capillary structure are spaced apart from an outer surface of a heat source of the first shell, and the third capillary structure is aligned with the heat source.

10. The heat dissipation device according to claim 1, characterized in that: The first capillary structure has at least one bend.

11. The heat dissipation device according to claim 10, characterized in that: At least a portion of the first capillary structure at least partially overlaps an outer surface of a heat source of the first shell.

12. A heat dissipation device, characterized in that: Include: a first shell; A second shell is coupled to the first shell, and the second shell comprises: A main body has an inner surface, an outer surface, a first portion, a second portion, a third portion, and a plurality of support structures, the outer surface is relative to the inner surface, the first portion and the second portion have the same cross-sectional area, the third portion has a cross-sectional area different from the cross-sectional areas of the first portion and the second portion, the third portion is located between the first portion and the second portion, and the support structures are located on the inner surface; and a sheet-like capillary structure disposed on the inner surface and disposed in at least two of the first portion, the second portion, and the third portion; A first capillary structure is a structure extending horizontally or vertically and is disposed on the inner surface, and its two ends are respectively connected to at least two of the first part, the second part and the third part. The first capillary structure does not completely cover the sheet-like capillary structure.

13. The heat dissipation device according to claim 12, characterized in that: The cross-sectional area of ​​the third portion is greater than the cross-sectional areas of the first portion and the second portion.

14. The heat dissipation device according to claim 12, characterized in that: The cross-sectional area of ​​the third portion is smaller than the cross-sectional areas of the first portion and the second portion.

15. The heat dissipation device according to claim 12, characterized in that: The invention also comprises a second capillary structure which is disposed on the inner surface and in at least two of the first part, the second part and the third part.

16. The heat dissipation device according to claim 15, characterized in that: The first capillary structure and the second capillary structure contact an edge of at least two of the first portion, the second portion and the third portion formed on the heat dissipation device.

17. The heat dissipation device according to claim 15, characterized in that: The first capillary structure and the second capillary structure are spaced apart from an edge of at least two of the first portion, the second portion and the third portion formed on the heat dissipation device.

18. The heat dissipation device according to claim 15, characterized in that: The first capillary structure and the second capillary structure are disposed in the first portion, the second portion and the third portion.

19. The heat dissipation device according to claim 15, characterized in that: The first capillary structure is disposed in the first portion and the third portion, and the second capillary structure is disposed in the second portion and the third portion.

20. The heat dissipation device according to claim 15, characterized in that: The first capillary structure and the second capillary structure each have at least one bend.

21. The heat dissipation device according to claim 12, characterized in that: The heat dissipation device only includes the first capillary structure, and the first capillary structure is spaced apart from an edge of the heat dissipation device on which at least two of the first portion, the second portion and the third portion are formed.

22. The heat dissipation device according to claim 15, characterized in that: The outer surface of the first shell overlaps with a heat source, and each of the first capillary structure and the second capillary structure at least partially overlaps a first side of the first shell opposite to the heat source.

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