3DVC heat dissipation device

Abstract

The utility model discloses a 3DVC heat radiation device, comprising a uniform temperature plate comprising an upper cover and a bottom plate connected with the upper cover, and the upper cover and the bottom plate enclose to form a uniform temperature plate inner cavity; the bottom end of the heat pipe is provided with a flange protruding out of the periphery of the heat pipe in the radial direction, the flange is welded to the upper cover in an attached mode, the position, used for being attached to the flange, of the upper cover is provided with a welding ring groove used for containing a welding ring for welding, and the position, corresponding to the heat pipe, of the upper cover is provided with a through hole used for communicating an inner cavity of the vapor chamber with the interior of the heat pipe. The flange is welded with the upper cover, so that the welding area can be increased, and the connection strength of the heat pipe and the vapor chamber and the heat transfer effect at the joint are improved; during welding, the welding ring is fused in the welding ring groove and does not overflow, so that seamless connection between the flange and the upper cover is ensured, and welding flux is prevented from overflowing into the heat pipe and the temperature-uniforming plate to pollute capillary structures in the heat pipe and the temperature-uniforming plate; a welding ring groove is reserved in the attaching face of the upper cover and the flange and has the effect of enlarging the interference face of the heat pipe and the vapor chamber, and displacement or shaking is not prone to occurring in the welding process.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation of electronic products, and more specifically to a 3DVC heat dissipation device. Background Art

[0002] Heat pipes are one-dimensional thermal conductive elements. Heat is transferred from one end of the heat pipe to the other end, and it has a good vertical thermal conductivity effect. Vapor chambers are two-dimensional thermal conductive elements. Heat is transferred from a point to a surface, and it can transfer heat horizontally in the heat area very well. Combining heat pipes with vapor chambers can form a three-dimensional vapor chamber, referred to as 3DVC (3 Dimension Vapor Chambers).

[0003] In the process of implementing the present invention, the inventors found that the prior art has at least the following problems:

[0004] At present, one end of the heat pipe is usually welded directly to the temperature equalizing plate. After the heat pipe and the temperature equalizing plate are welded, the risk of leakage is relatively high. The welding flux is easy to overflow into the inner cavity of the temperature equalizing plate and the heat pipe, resulting in damage to the internal capillary structure of the temperature equalizing plate and the heat pipe, resulting in poor heat transfer effect. Moreover, the welding surface of the heat pipe and the temperature equalizing plate is small, resulting in unclear heat transfer between the heat pipe and the temperature equalizing plate, and the overall 3DVC heat dissipation effect is poor.

[0005] Therefore, how to improve the heat dissipation effect of 3DVC is a problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0006] In view of this, an object of the present invention is to provide a 3DVC heat dissipation device with good heat dissipation effect.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A 3DVC heat dissipation device, comprising:

[0009] A temperature equalizing plate, comprising an upper cover and a bottom plate connected to the upper cover, wherein the upper cover and the bottom plate enclose an inner cavity of the temperature equalizing plate;

[0010] The heat pipe has a flange at its bottom end that radially protrudes from the outer periphery of the heat pipe, the flange is welded to the upper cover, a welding ring groove for accommodating the welded welding ring is provided at a position of the upper cover for fitting with the flange, and a through hole for connecting the inner cavity of the temperature equalizing plate with the interior of the heat pipe is provided at a position of the upper cover corresponding to the heat pipe.

[0011] Optionally, the flange is formed based on a bell-mouth expansion structure at the bottom end of the heat pipe.

[0012] Optionally, the length of the bell-mouth expansion structure is 0.25 to 0.3125 times the diameter of the heat pipe, and the outer diameter of the flange is 1.4 to 1.5 times the diameter of the heat pipe.

[0013] Optionally, a recessed groove is provided at a position of the upper cover corresponding to the flange, the welding ring groove is provided at the bottom of the recessed groove, and the flange is provided in the recessed groove.

[0014] Optionally, the sink groove is arranged on the outer side surface of the upper cover away from the bottom plate, and the bottom end of the flange is in close contact with the bottom of the sink groove.

[0015] Optionally, the sink groove is arranged on the inner side of the upper cover facing the bottom plate, and the heat pipe passes through the through hole from the inner side of the upper cover, so that the top end of the flange is in contact with the bottom of the sink groove.

[0016] Optionally, a first capillary structure is sintered at the bottom end of the heat pipe, and the first capillary structure passes through the through hole and extends to the bottom plate, and is connected to a second capillary structure on the bottom plate.

[0017] Optionally, the first capillary structure includes two arc-shaped capillary structures, and a gap is provided between the two arc-shaped capillary structures.

[0018] Optionally, the upper cover is provided with a first boss protruding outward in a direction away from the bottom plate, the first boss and the upper cover are an integral structure, and the flange is fitted and welded to the first boss.

[0019] Optionally, the bottom plate is provided with a second boss protruding outward in a direction away from the upper cover, and the upper cover, the bottom plate and the second boss form an integral structure.

[0020] The 3DVC heat dissipation device provided by the utility model realizes the connection between the heat pipe and the temperature-averaging plate by arranging a radially outwardly protruding flange at the bottom end of the heat pipe and welding the flange with the upper cover, which can increase the welding area, improve the connection strength between the heat pipe and the temperature-averaging plate, and improve the heat transfer effect at the connection between the heat pipe and the temperature-averaging plate, thereby improving the heat dissipation performance of the 3DVC; moreover, the upper cover is provided with a welding ring groove at the position where the flange is fitted, and during welding, the welding ring can be located in the welding ring groove, so that the welding ring is fully integrated inside the welding ring groove without overflowing, thereby ensuring that the welding surface of the flange and the upper cover are connected together without a gap, preventing the solder from overflowing from the fitting surface between the flange and the upper cover into the heat pipe and the inner cavity of the temperature-averaging plate, contaminating the capillary structure in the heat pipe and the inner cavity of the temperature-averaging plate, thereby affecting the heat transfer effect of the heat pipe and the temperature-averaging plate, thereby further improving the heat dissipation effect of the 3DVC. At the same time, the yield rate of welding the heat pipe and the temperature-averaging plate is improved, and the cost is reduced. In addition, a welding ring groove is reserved on the fitting surface where the upper cover of the temperature homogenizing plate fits with the flange, which has the effect of increasing the interference surface between the heat pipe and the temperature homogenizing plate, making it difficult to shift or shake during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 A front view of a 3DVC heat dissipation device provided by a specific embodiment of the utility model;

[0023] Figure 2 for Figure 1 A partial enlarged view of middle A;

[0024] Figure 3 for Figure 1 A top view of the 3DVC heat sink shown;

[0025] Figure 4 for Figure 3 A partial enlarged view of B in the middle;

[0026] Figure 5 for Figure 1 A side view of the 3DVC heat sink shown;

[0027] Figure 6 for Figure 5 A partial enlarged view of C in the middle.

[0028] Reference numerals:

[0029] 1-temperature balancing plate; 11-upper cover; 111-welding ring groove; 112-sink; 113-first boss; 12-bottom plate; 121-second boss; 13-temperature plate cavity; 2-heat pipe; 21-flange; 22-first capillary structure; 221-arc capillary structure. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The core of the utility model is to provide a 3DVC heat dissipation device with good heat dissipation effect.

[0032] Please refer to Figure 1 and Figure 2 The embodiment of the utility model provides a 3DVC heat dissipation device, including a temperature equalizing plate 1 and a heat pipe 2. The temperature equalizing plate 1 includes an upper cover 11 and a bottom plate 12 connected to the upper cover 11. The upper cover 11 and the bottom plate 12 enclose an inner cavity 13 of the temperature equalizing plate; the bottom end of the heat pipe 2 is provided with a flange 21 protruding radially from the outer periphery of the heat pipe 2, the flange 21 is welded to the upper cover 11, and a welding ring groove 111 for accommodating a welding welding ring is provided at a position of the upper cover 11 for fitting with the flange 21. A through hole for connecting the inner cavity 13 of the temperature equalizing plate with the inside of the heat pipe 2 is provided at a position of the upper cover 11 corresponding to the heat pipe 2.

[0033] That is to say, in this embodiment, a radially outwardly protruding flange 21 is provided at the bottom end of the heat pipe 2, and the flange 21 is welded to the upper cover 11 to achieve the connection between the heat pipe 2 and the temperature-averaging plate 1, which can increase the welding area, improve the connection strength between the heat pipe 2 and the temperature-averaging plate 1, and improve the heat transfer effect at the connection between the heat pipe 2 and the temperature-averaging plate 1, thereby improving the heat dissipation performance of the 3DVC; moreover, a welding ring groove 111 is provided at the position of the upper cover 11 for fitting with the flange 21. During welding, the welding ring can be located in the welding ring groove 111, so that the welding ring is fully integrated into the inside of the welding ring groove 111 without overflowing, thereby ensuring that the welding surfaces of the flange 21 and the upper cover 11 are connected together without a gap, preventing the solder from overflowing from the fitting surface between the flange 21 and the upper cover 11 into the inside of the heat pipe 2 and the inner cavity 13 of the temperature-averaging plate, polluting the capillary structure in the heat pipe 2 and the inner cavity 13 of the temperature-averaging plate, thereby affecting the heat transfer effect of the heat pipe 2 and the temperature-averaging plate 1, and therefore, the heat dissipation effect of the 3DVC can be further improved. At the same time, the yield of welding the heat pipe 2 and the temperature averaging plate 1 is improved, and the cost is reduced. In addition, the welding ring groove 111 is reserved on the fitting surface of the upper cover 11 of the temperature averaging plate 1 and the flange 21, which has the effect of increasing the interference surface between the heat pipe 2 and the temperature averaging plate 1, making it difficult to shift or shake during welding.

[0034] It should be noted that the embodiment does not limit the specific arrangement of the flange 21, as long as it can be arranged radially outwardly at the bottom of the heat pipe 2. For example, the connection method between the flange 21 and the heat pipe 2 includes but is not limited to: welding, bonding, interference fit, etc.

[0035] In some embodiments, the flange 21 is formed based on the bell-mouth flaring structure at the bottom end of the heat pipe 2. It should be noted that the bell-mouth flaring structure is an intermediate process structure in the process of forming the flange 21. The bell-mouth flaring structure is a trumpet-like structure, that is, the bell-mouth flaring structure has a certain axial length along the length direction of the heat pipe 2, and the tube diameter of the bell-mouth flaring structure gradually increases from one end to the other end. The tube diameter of the end of the bell-mouth flaring structure connected to the heat pipe 2 is the same as the tube diameter of the heat pipe 2 body, and the tube diameter of the free end of the bell-mouth flaring structure is the largest. In other words, during the processing of the heat pipe 2, one end of the heat pipe 2 is made into a bell-mouth flaring structure, so that it is pressed together through the shaping mold to make the bell mouth. The flared structure is turned outward to become a flange 21, and the position of the flange 21 is located at the end where the bell-mouth flared structure is connected to the heat pipe 2, that is, the inner diameter of the flange 21 is equal to the inner diameter of the heat pipe 2, that is, the bell-mouth flared structure is flattened into the flange 21, so that the flange 21 becomes a circular ring structure protruding from the outer periphery of the heat pipe 2 along the radial direction of the heat pipe 2. At this time, the flange 21 is perpendicular to the outer periphery of the heat pipe 2. It can be seen that the flange 21 and the heat pipe 2 are integrally formed in this embodiment, avoiding the additional flange 21 structure at the bottom end of the heat pipe 2. Therefore, the connection structure between the flange 21 and the heat pipe 2 is avoided, which is beneficial to improving the overall performance of the heat pipe 2.

[0036] It should be noted that when the bell-mouth flaring structure is shaped to form the flange 21, the root of the bell-mouth flaring structure can be directly 90 degrees to the bottom end of the heat pipe 2, or the root of the bell-mouth flaring structure can be transitioned to a state where the flange 21 and the heat pipe 2 are 90 degrees through an arc transition structure.

[0037] In addition, in order to avoid defects such as cracks when the flange 21 is formed by shaping the bell-mouth flared structure, in some embodiments, the length of the bell-mouth flared structure is 0.25-0.35 times the diameter of the heat pipe 2, and the outer diameter of the flange 21 is 1.4-1.5 times the diameter of the heat pipe 2. In practical applications, the inventors of the present application found that the quality of the flange 21 formed by shaping the bell-mouth flared structure is related to the two parameters of the length of the bell-mouth flared structure and the outer diameter of the flange 21 after the flange 21 is formed. Further, the inventors of the present application found that when the length of the bell-mouth flared structure is 0.25-0.35 times the diameter of the heat pipe 2 and the outer diameter of the flange 21 is 1.4-1.5 times the diameter of the heat pipe 2, the quality of the flange 21 is the closest. For example, when the diameter of the heat pipe 2 is φ8mm, the length of the bell-mouth flared structure is 2-2.5mm, and the outer diameter of the flange 21 is 11.5-12mm, which is the best. Of course, when the diameter of the heat pipe 2 is other sizes, the length of the bell-mouth expansion structure and the outer diameter of the flange 21 can be calculated according to the above relationship.

[0038] Also, please refer to Figure 2 , Figure 4 and Figure 6 When the heat pipe 2 is welded to the temperature-averaging plate 1, in order to achieve rapid positioning of the heat pipe 2, in some embodiments, a recessed groove 112 is provided at the position of the upper cover 11 corresponding to the flange 21, the welding ring groove 111 is provided at the bottom of the recessed groove 112, and the flange 21 is provided in the recessed groove 112. That is to say, when the heat pipe 2 is welded to the temperature-averaging plate 1, the flange 21 of the heat pipe 2 is located in the recessed groove 112 of the upper cover 11, and the recessed groove 112 is used to limit the flange 21, so as to achieve rapid positioning of the heat pipe 2 and facilitate the connection between the heat pipe 2 and the temperature-averaging plate 1. It can be understood that the recessed groove 112 and the through hole corresponding to the heat pipe 2 on the upper cover 11 form a stepped hole, the bottom of the recessed groove 112 is the step surface of the stepped hole, the welding ring groove 111 is provided on the step surface, and considering the convenience of welding, the welding ring groove 111 is located at the position of the step surface close to the inner wall of the recessed groove 112.

[0039] It should be noted that the present embodiment does not limit the specific position of the sink 112 , and the sink 112 may be located on the outer side of the upper cover 11 away from the bottom plate 12 , or on the inner side of the upper cover 11 facing the bottom plate 12 .

[0040] For example, in some embodiments, the sink 112 is provided on the outer side of the upper cover 11 away from the bottom plate 12, and the bottom end of the flange 21 is in contact with the bottom of the sink 112. In this case, during the assembly of the heat pipe 2 and the temperature equalizer 1, the flange 21 is directly placed into the sink 112 from top to bottom, so that the bottom end of the flange 21 is in contact with the bottom of the sink 112, and then the flange 21 is welded to the sink 112. This solution makes the installation of the heat pipe 2 convenient.

[0041] like Figure 1 and Figure 2 As shown, in other embodiments, the sink 112 is provided on the inner side of the upper cover 11 facing the bottom plate 12, and the heat pipe 2 passes through the through hole from the inner side of the upper cover 11, so that the top of the flange 21 is in contact with the bottom of the sink 112. In this case, during the assembly of the heat pipe 2 and the temperature equalizing plate 1, it is necessary to pass the heat pipe 2 through the through hole, so that the heat pipe 2 passes from the inner side of the upper cover 11 to the outer side of the upper cover 11, and then the flange 21 is located in the sink 112, so that the top of the flange 21 is in contact with the bottom of the sink 112. This solution makes the flange 21 located on the inner side of the upper cover 11 facing the bottom plate 12, avoids the flange 21 from being exposed to the outside, has a certain protective effect on the flange 21, is conducive to protecting the welding position of the flange 21 and the upper cover 11, and improves the service life.

[0042] In addition, after the heat pipe 2 is connected to the temperature equalizing plate 1 in the prior art, the flow direction of the steam circulation inside the heat pipe 2 is: the steam in the heat pipe 2 passes through the capillary structure inside the heat pipe 2, passes through the capillary structure on the inner side of the upper cover 11 of the temperature equalizing plate 1, and then passes through the capillary structure attached to the support column, flows to the capillary structure on the inner side of the bottom plate 12 of the temperature equalizing plate 1, takes away the heat at the bottom heat source of the bottom plate 12 of the temperature equalizing plate 1, and then flows to another support column through the capillary structure on the inner side of the bottom plate 12, passes through the capillary structure attached to the support column, and flows back to the capillary structure inside the heat pipe 2, forming a complete steam circulation system. It can be seen that this structural form requires the steam to pass through more flow processes, which is not conducive to heat transfer.

[0043] Therefore, in order to achieve the best heat transfer effect, please refer to Figure 3 , Figure 4 , Figure 5 and Figure 6In some embodiments, a first capillary structure 22 is sintered at the bottom end of the heat pipe 2, and the first capillary structure 22 passes through the through hole and extends to the bottom plate 12, and is connected with the second capillary structure on the bottom plate 12. That is to say, in this embodiment, by providing the first capillary structure 22, the capillary structure in the heat pipe 2 is directly connected with the second capillary structure on the bottom plate 12, so that the capillary structure in the heat pipe 2 is directly connected in series with the second capillary structure of the bottom plate 12 of the temperature homogenizing plate 1 by using the first capillary structure 22, so that the steam in the heat pipe 2 directly reaches the bottom plate 12 through the first capillary structure 22, and the steam in the heat pipe 2 is prevented from reaching the bottom plate 12 through the capillary structure attached to the support column, thereby shortening the steam circulation channel of the heat pipe 2 and improving the heat dissipation effect.

[0044] Furthermore, if Figure 4 and Figure 6 As shown, in some embodiments, the first capillary structure 22 includes two arc-shaped capillary structures 221, and there is a gap between the two arc-shaped capillary structures 221. That is to say, in this embodiment, the two arc-shaped capillary structures 221 extend directly from the bottom end of the heat pipe 2 to the bottom plate 12, so that the steam in the heat pipe 2 directly reaches the bottom plate 12 through one of the arc-shaped capillary structures 221, flows to the other arc-shaped capillary structure 221 through the second capillary structure on the bottom plate 12, and then directly reaches the heat pipe 2 through the other arc-shaped capillary structure 221, forming a cycle. It can be seen that this structure further shortens the steam circulation flow channel of the heat pipe 2, so that heat transfer can be better, and the heat dissipation effect of the connection between the temperature averaging plate 1 and the heat pipe 2 is well utilized, so that the heat dissipation effect of each heat pipe 2 is fully utilized, and the thermal resistance of the entire 3DVC heat dissipation device is also reduced, so that the heat dissipation effect of the entire 3DVC heat dissipation device is maximized, so that the heat dissipation effect is better. It is understandable that the gap between the two arc-shaped capillary structures 221 makes the overall reflux effect of the vapor in the inner cavity 13 of the temperature equalizer better and the heat dissipation effect more significant. In some embodiments, the two arc-shaped capillary structures 221 are both semi-annular capillary structures.

[0045] In addition, if Figure 5 and Figure 6 As shown, in order to facilitate the connection between the upper cover 11 and the flange 21 and ensure the structural strength of the connection, in some embodiments, the upper cover 11 is provided with a first boss 113 that protrudes outward in a direction away from the bottom plate 12, the first boss 113 and the upper cover 11 are an integral structure, and the flange 21 is welded to the first boss 113. In other words, in this embodiment, by providing the first boss 113 at the position of the upper cover 11 for connecting the heat pipe 2, the first boss 113 is used to increase the thickness of the upper cover 11 corresponding to the heat pipe 2, so as to facilitate the opening of the sink 112 on the upper cover 11 for connecting with the flange 21, thereby ensuring the structural strength of the connection between the heat pipe 2 and the upper cover 11.

[0046] In addition, please continue to refer to Figure 5 and Figure 6 In order to facilitate heat dissipation of the heat source, in some embodiments, the bottom plate 12 is provided with a second boss 121 that protrudes in a direction away from the upper cover 11, and the upper cover 11, the bottom plate 12 and the second boss 121 form an integral structure. It can be understood that the second boss 121 is convenient to protrude in the direction of the heat source to better fit the heat source, thereby improving the heat dissipation effect of the heat source. The upper cover 11, the bottom plate 12 and the second boss 121 form an integral structure, which is conducive to ensuring the overall heat dissipation performance of the temperature vapor chamber 1.

[0047] It should be noted that if Figure 6 As shown, when the bottom plate 12 is provided with a second boss 121 , the first capillary structure 22 sintered at the bottom end of the heat pipe 2 corresponding to the second boss 121 extends to the inner side of the second boss 121 to contact the capillary structure inside the second boss 121 .

[0048] It should also be noted that, in this specification, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0049] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0050] The above is a detailed introduction to the 3DVC heat dissipation device provided by the utility model. This article uses specific examples to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the utility model.

Claims

1. A 3DVC heat dissipation device, characterized in that: include: A temperature equalizing plate (1) comprising an upper cover (11) and a bottom plate (12) connected to the upper cover (11), wherein the upper cover (11) and the bottom plate (12) enclose an inner cavity (13) of the temperature equalizing plate; A heat pipe (2), the bottom end of which is provided with a flange (21) protruding radially from the outer periphery of the heat pipe (2), the flange (21) being welded to the upper cover (11), a welding ring groove (111) for accommodating the welded welding ring being provided at a position of the upper cover (11) for fitting with the flange (21), and a through hole for connecting the inner cavity (13) of the temperature equalizing plate with the interior of the heat pipe (2) being provided at a position of the upper cover (11) corresponding to the heat pipe (2).

2. The 3DVC heat dissipation device according to claim 1, characterized in that: The flange (21) is formed based on the bell-mouth expansion structure at the bottom end of the heat pipe (2).

3. The 3DVC heat dissipation device according to claim 2, characterized in that: The length of the bell-mouth expansion structure is 0.25 to 0.3125 times the diameter of the heat pipe (2), and the outer diameter of the flange (21) is 1.4 to 1.5 times the diameter of the heat pipe (2).

4. The 3DVC heat dissipation device according to claim 1, characterized in that: The upper cover (11) is provided with a sink groove (112) at a position corresponding to the flange (21); the welding ring groove (111) is provided at the bottom of the sink groove (112); and the flange (21) is provided in the sink groove (112).

5. The 3DVC heat dissipation device according to claim 4, characterized in that: The sink groove (112) is arranged on the outer side surface of the upper cover (11) facing away from the bottom plate (12), and the bottom end of the flange (21) is in close contact with the bottom of the sink groove (112).

6. The 3DVC heat dissipation device according to claim 4, characterized in that: The sink groove (112) is arranged on the inner side surface of the upper cover (11) facing the bottom plate (12), and the heat pipe (2) passes through the through hole from the inner side of the upper cover (11), so that the top end of the flange (21) is in contact with the bottom of the sink groove (112).

7. The 3DVC heat dissipation device according to any one of claims 1 to 6, characterized in that: A first capillary structure (22) is sintered at the bottom end of the heat pipe (2); the first capillary structure (22) passes through the through hole and extends onto the bottom plate (12), and is connected to a second capillary structure on the bottom plate (12).

8. The 3DVC heat dissipation device according to claim 7, characterized in that: The first capillary structure (22) comprises two arc-shaped capillary structures (221), and a gap is provided between the two arc-shaped capillary structures (221).

9. The 3DVC heat dissipation device according to any one of claims 1 to 6, characterized in that: The upper cover (11) is provided with a first boss (113) which protrudes outward in a direction away from the bottom plate (12); the first boss (113) and the upper cover (11) are an integral structure; and the flange (21) and the first boss (113) are fitted and welded.

10. The 3DVC heat dissipation device according to any one of claims 1 to 6, characterized in that: The bottom plate (12) is provided with a second boss (121) which protrudes outward in a direction away from the upper cover (11); the upper cover (11), the bottom plate (12) and the second boss (121) form an integral structure.

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