Integrated 3D printed heat sink structure and heat dissipation device

Abstract

This disclosure provides an integrated 3D printed heat sink structure and heat dissipation device. The integrated 3D printed heat sink structure includes a 3D printed integral shell, a liquid inlet end, a liquid outlet end, multiple heat sinks, and a base plate. The shell has liquid passages communicating with the liquid inlet end and the liquid outlet end respectively. The liquid passages include a liquid inlet chamber, a heat dissipation chamber, and a liquid outlet chamber connected in sequence. Multiple heat sinks extend along both ends of the heat dissipation chamber and are integrally connected to the inner wall of the shell and the base plate. The heat sinks have turbulence holes. The inner wall of the shell also has multiple supporting columns protruding, which are spaced apart from each other in the liquid inlet chamber and the liquid outlet chamber. By using 3D integrated metal printing, the risk of leakage at the welding points is avoided. The multiple heat sinks are firmly connected to the shell and the base plate, enhancing the overall pressure resistance and deformation resistance of the shell. The multiple supporting columns spaced apart in the liquid inlet chamber and the liquid outlet chamber reduce the area of ​​the printing span that is suspended, preventing collapse during printing.

Description

Technical Field

[0001] This disclosure relates to the technical field of heat sinks, and in particular to an integrated 3D printed heat sink structure and heat dissipation device. Background Technology

[0002] With the rapid development of the electronic information industry, the computing speed and power density of integrated circuit chips are constantly improving, and the heat generated during their operation is also increasing dramatically; liquid cooling radiators are widely used in high heat flux density heat dissipation scenarios.

[0003] Liquid-cooled radiators are manufactured from metal through machining, brazing, or assembly processes. To enhance the heat exchange area, fins or toothed structures are often incorporated into the flow channels. The assembly interfaces between components and the brazed layers increase the risk of internal liquid leakage. Metal 3D printing technology has revolutionized radiator design, completely eliminating assembly gaps and brazing thermal resistance between components. However, in application, when the internal cavity of the radiator has a large span, the suspended areas lack support during 3D printing, making them prone to collapse or deformation, leading to printing failures or poor surface quality of the internal flow channels. Utility Model Content

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide an integrated 3D printed heat sink structure and heat dissipation device that eliminates interface thermal resistance and reduces span overhang to avoid collapse.

[0005] The purpose of this disclosure is achieved through the following technical solution:

[0006] An integrated 3D-printed heat sink structure includes a 3D-printed integrated shell, a liquid inlet end, a liquid outlet end, heat sink fins, and a base plate;

[0007] The housing has a liquid passage, and the liquid inlet and the liquid outlet are respectively connected to the liquid passage. The liquid passage includes a liquid inlet chamber, a heat dissipation chamber and a liquid outlet chamber connected in sequence. The heat sink is disposed in the heat dissipation chamber. There are multiple heat sinks, which extend along both ends of the heat dissipation chamber. A heat dissipation channel is formed between adjacent heat sinks. The two ends of the heat sink along the vertical direction of fluid flow in the heat dissipation chamber are respectively connected to the inner wall of the housing and the bottom plate. The heat sink has a turbulence hole, which is connected to the adjacent heat dissipation channel.

[0008] The inner wall of the shell is also provided with a support column, and there are multiple support columns. The multiple support columns are spaced apart in the liquid inlet chamber and spaced apart in the liquid outlet chamber.

[0009] In one embodiment, the liquid inlet chamber and the liquid outlet chamber are respectively disposed at both ends of the heat sink.

[0010] In one embodiment, the heat sinks are symmetrically arranged in the heat dissipation cavity.

[0011] In one embodiment, the turbulence holes are located in regions away from both ends of the heat sink along its length.

[0012] In one embodiment, the plurality of heat sinks are all of a wave-shaped structure.

[0013] In one embodiment, the support column is a columnar structure.

[0014] In one embodiment, the base plate has a plurality of fixing holes along the circumference of the housing.

[0015] In one embodiment, the inlet and outlet are tubular structures.

[0016] In one embodiment, the inlet and outlet are perpendicular to the top of the housing.

[0017] A heat dissipation device includes the integrated 3D-printed heat sink structure described in any of the above embodiments.

[0018] Compared with the prior art, this disclosure has at least the following advantages:

[0019] The aforementioned integrated 3D printed heat sink structure, formed by 3D integrated metal printing, avoids the risk of leakage at the welding joints of various components and eliminates the contact thermal resistance caused by assembly or welding between components, thus improving heat conduction efficiency. Multiple heat sinks are firmly connected to the shell and base plate to form a high-density and high-rigidity internal support area, enhancing the overall shell's resistance to pressure and deformation. Multiple support columns spaced apart in the liquid inlet cavity reduce the area of ​​suspended printing, preventing the shell from collapsing during metal printing and improving the success rate and quality of printing. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of an integrated 3D printed heat sink structure according to one embodiment;

[0022] Figure 2 for Figure 1 A cross-sectional view of the integrated 3D-printed heat sink structure shown.

[0023] Figure 3 for Figure 1 A partial structural diagram of the integrated 3D printed heat sink structure is shown. Detailed Implementation

[0024] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0028] Please see Figures 1 to 3As shown, an integrated 3D-printed heat sink structure 10 according to an embodiment of this disclosure includes a 3D-printed integral shell 100, a liquid inlet end 200, a liquid outlet end 300, heat sink 400, and a base plate 500. The shell 100 has a liquid passage 101. The liquid inlet end 200 and the liquid outlet end 300 are respectively connected to the liquid passage 101. The liquid passage 101 includes a liquid inlet chamber 102, a heat dissipation chamber 103, and a liquid outlet chamber 104 connected in sequence. The heat sink 400 is disposed in the heat dissipation chamber 103. There are multiple heat sinks 400, and the multiple heat sinks 400 are arranged along... The heat dissipation cavity 103 extends to both ends, and the two ends of the heat dissipation cavity 103 are the inlet end connected to the liquid inlet cavity 102 and the outlet end connected to the liquid outlet cavity 104. A heat dissipation channel 401 is formed between adjacent heat dissipation fins 400. Fluid enters the liquid outlet cavity 104 after passing through the heat dissipation cavity 103 from the liquid inlet cavity 102. The two ends of the heat dissipation fins 400 along the vertical direction of fluid flow in the heat dissipation cavity 103 are respectively connected to the inner wall of the housing 100 and the bottom plate 500. The heat dissipation fins 400 are provided with turbulence holes 402, and the turbulence holes 402 are connected to the adjacent heat dissipation channels 401.

[0029] Furthermore, the inner wall of the housing 100 is also provided with a support column 110. There are multiple support columns 110, which are spaced apart in the liquid inlet chamber 102 and spaced apart in the liquid outlet chamber 104. The multiple support columns 110 are connected to the housing 100 and the bottom plate 500 as a whole.

[0030] In this embodiment, the inlet end 200, outlet end 300, shell 100, heat sink 400, base plate 500, and support column 110 are formed in one step by 3D metal printing, eliminating the assembly gaps between the various components of the radiator structure and the thermal resistance generated by brazing. In the heat dissipation cavity 103 of the shell 100, multiple heat sinks 400 are integrally connected to the base plate 500 and the inner wall of the shell 100. The gaps between the multiple heat sinks 400 are small, the structural strength of the multiple heat sinks 400 is high, and the support of the shell 100 is good. The turbulence hole 401 disrupts the stable laminar flow of the coolant, causing the coolant fluid to generate lateral mixing and eddies between adjacent heat dissipation channels 401, thereby enhancing the heat exchange efficiency. The support column 110 supports the inlet cavity 102 and outlet cavity 104 of the shell 100, reducing the area of ​​the span-suspended printing.

[0031] The aforementioned integrated 3D printed heat sink structure 10, formed by 3D integrated metal printing, avoids the risk of leakage at the welding joints of various components and eliminates the contact thermal resistance caused by assembly or welding between components, thereby improving heat conduction efficiency. Multiple heat sinks 400 are firmly connected to the shell 100 and the base plate 500 to form a high-density and high-rigidity internal support area, enhancing the pressure resistance and deformation resistance of the entire shell 100. Multiple support columns 110 are spaced apart in the liquid inlet cavity 102, reducing the area of ​​the span suspended printing, preventing the shell 100 from collapsing during the metal printing process, and improving the success rate and quality of printing.

[0032] like Figure 3 As shown, in one embodiment, the inlet chamber 102 and the outlet chamber 104 are respectively located at both ends of the heat sink 400. In this embodiment, the coolant flows in from the inlet chamber 102 on one side, passes through the heat dissipation channel 401 of the heat sink 400, and flows out from the outlet chamber 104 on the other side. This maximizes the contact area between the coolant and the heat sink 400, ensuring sufficient contact between the coolant and the heat sink 400 and the base plate 500, thereby improving heat dissipation efficiency and uniformity.

[0033] like Figure 3 As shown, in one embodiment, the heat sink 400 is symmetrically arranged in the heat dissipation cavity 103. In this embodiment, when the coolant enters the symmetrical flow channel from the inlet cavity 102, the fluid is evenly distributed to the heat dissipation channels 401 on both sides, so that the flow temperature of the coolant is uniform, thereby achieving uniform flow and heat dissipation; the symmetrical structure helps to evenly distribute thermal stress and reduce warping deformation during 3D printing.

[0034] like Figure 3 As shown, in one embodiment, the support column 110 is a columnar structure. In this embodiment, the columnar structure has a regular shape, and during the 3D printing process, the accumulation and solidification behavior of molten metal or powder on such a geometry is more stable and controllable, reducing the generation of printing defects, thereby improving the product yield and long-term reliability. Specifically, the support column 110 is at least one of a cylinder, prism, elliptical cylinder, and irregular cross-section column.

[0035] like Figure 3 As shown, in one embodiment, the turbulence-disrupting holes 402 are located in regions away from both ends of the heat sink 400 along its length. In this embodiment, the two ends of the fluid flow in the heat dissipation cavity 103 of the heat sink 400 are connected to the inner wall of the housing 100 and the bottom plate 500 respectively, providing main force support points. By opening the turbulence-disrupting holes 402 in the middle of the heat sink 400, the stress-bearing areas at both ends of the heat sink 400 are avoided, reducing the weakening of the overall structural strength and support stiffness of the heat sink 400.

[0036] like Figure 3 As shown, in one embodiment, the plurality of heat sinks 400 are all of a wave-shaped structure. In this embodiment, the turbulence effect of the coolant is enhanced when it flows through the wave-shaped flow channel, resulting in a more uniform mixing of hot and cold fluids; the wave-shaped structure, by introducing continuous bending within the same projected space, extends the effective heat exchange length of the heat sink 400 and improves the structural stiffness and stability of the heat sink 400 under the impact of coolant flow.

[0037] like Figure 1 As shown, in one embodiment, the base plate 500 has a plurality of fixing holes 501 along the circumference of the housing 100. In this embodiment, the fixing holes 501 are integrated around the periphery of the base plate 500, leaving sufficient space above the base plate 500 and optimizing the spatial layout; the integrated 3D printed heat sink structure is mounted on the heat source through the fixing holes 501, so that the base plate 500 is stably connected to the heat source, preventing displacement or loosening under external force, and ensuring long-term reliability.

[0038] like Figure 1 As shown, in one embodiment, the inlet end 200 and the outlet end 300 are tubular structures. In this embodiment, the tubular structure of the inlet end 200 and the outlet end 300 facilitates the 3D printing of the inlet end 200 and the outlet end 300, and the tubular structure of the inlet end 200 and the outlet end 300 is easily compatible with different interfaces, simplifying the installation and maintenance process.

[0039] like Figure 1 As shown, in one embodiment, the inlet end 200 and the outlet end 300 are perpendicular to the top of the housing 100. In this embodiment, the cooling pipes are connected vertically above the radiator, which minimizes the bends and shortens the path of the coolant flow, reducing the flow resistance of the coolant; during the 3D printing process, the inlet end 200 and the outlet end 300, which are perpendicular to the plane, are easy to form.

[0040] This application also provides a heat dissipation device, including the integrated 3D-printed heat sink structure described in any of the above embodiments. In this embodiment, the integrated 3D-printed heat dissipation structure is integrally formed, which eliminates the contact thermal resistance caused by assembly, eliminates the risk of leakage due to brazing aging failure, and improves the long-term operational reliability and service life of the heat dissipation device.

[0041] Compared with the prior art, this disclosure has at least the following advantages:

[0042] The aforementioned integrated 3D printed heat sink structure, formed by 3D integrated metal printing, avoids the risk of leakage at the welding joints of various components and eliminates the contact thermal resistance caused by assembly or welding between components, thereby improving heat conduction efficiency. Multiple heat sinks 400 are firmly connected to the shell 100 and the base plate 500 to form a high-density and high-rigidity internal support area, enhancing the pressure resistance and deformation resistance of the entire shell 100. Multiple support columns 110 are spaced apart in the liquid inlet cavity 102, reducing the area of ​​the span suspended printing, preventing the shell 100 from collapsing during the metal printing process, and improving the success rate and quality of printing.

[0043] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A one-piece 3D printed heat sink structure, characterized in that, Includes a 3D-printed one-piece shell, liquid inlet, liquid outlet, heat sink, and base plate; The housing has a liquid passage, and the liquid inlet and the liquid outlet are respectively connected to the liquid passage. The liquid passage includes a liquid inlet chamber, a heat dissipation chamber and a liquid outlet chamber connected in sequence. The heat sink is disposed in the heat dissipation chamber. There are multiple heat sinks, which extend along both ends of the heat dissipation chamber. A heat dissipation channel is formed between adjacent heat sinks. The two ends of the heat sink along the vertical direction of fluid flow in the heat dissipation chamber are respectively connected to the inner wall of the housing and the bottom plate. The heat sink has a turbulence hole, which is connected to the adjacent heat dissipation channel. The inner wall of the shell is also provided with a support column, and there are multiple support columns. The multiple support columns are spaced apart in the liquid inlet chamber and spaced apart in the liquid outlet chamber.

2. The integrated 3D printed heat sink structure according to claim 1, characterized in that, The liquid inlet chamber and the liquid outlet chamber are respectively located at both ends of the heat sink.

3. The integrated 3D printed heat sink structure according to claim 1, characterized in that, The heat sinks are symmetrically arranged in the heat dissipation cavity.

4. The integrated 3D printed heat sink structure according to claim 3, characterized in that, The turbulence holes are located in the regions at both ends of the heat sink, away from its length direction.

5. The integrated 3D printed heat sink structure according to claim 1, characterized in that, All of the aforementioned heat sinks have a wave-shaped structure.

6. The integrated 3D printed heat sink structure according to claim 1, characterized in that, The support column is a columnar structure.

7. The integrated 3D printed heat sink structure according to claim 1, characterized in that, The base plate has multiple fixing holes along the circumference of the shell.

8. The integrated 3D printed heat sink structure according to claim 1, characterized in that, The inlet and outlet are tubular structures.

9. The integrated 3D printed heat sink structure according to claim 1, characterized in that, The liquid inlet and the liquid outlet are perpendicular to the top of the housing.

10. A heat dissipation device, characterized in that, The integrated 3D printed heat sink structure includes any one of claims 1-9.

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