A low-cost deep-hole cold plate design method based on spiral reinforcement heat dissipation

Abstract

The application relates to a low-cost deep-hole cold plate design method based on spiral reinforced heat dissipation, and the cold plate comprises a cold plate main body, a spiral disturbance device, a first plug cover, a second plug cover, an interconnection plug cover and an internal baffle; the cold plate main body is internally provided with a deep-hole flow channel; one end of the cold plate is provided with the first plug cover and the second plug cover, and the other end is provided with the second plug cover and the interconnection plug cover, so that the two flow channels are interconnected; the inner side of the interconnection plug cover is provided with the internal baffle; the plug cover and the baffle realize the serpentine interconnection of fluid in the cold plate; and the spiral disturbance device is arranged in the flow channel. According to the application, the spiral disturbance device is assembled in the flow channel, three-dimensional fluid organization in the cold plate flow channel space and the improvement of the heat dissipation area are realized, and the heat dissipation efficiency is greatly improved. The conventional processing and manufacturing means can be used to design a series of heat dissipation cold plates according to different heat dissipation requirements, so that the heat dissipation efficiency is improved, and the design and manufacturing costs are reduced.

Description

Technical Field

[0001] This invention relates to the field of designing elongated deep-hole cold plates for cooling radio frequency equipment, and more particularly to a low-cost deep-hole cold plate design method for spiral-enhanced heat dissipation. Background Technology

[0002] With the rapid development of the electronics and communications industries, radio frequency microwave devices are moving towards higher power and higher integration, making heat dissipation an increasingly prominent issue. As integration increases and systems become smaller, the heat flux density of devices further increases, while the area and thickness of cold plates are continuously compressed. To meet the ever-increasing heat dissipation requirements of devices, the complexity of cold plates is constantly increasing, and the spacing between heat dissipation teeth is constantly shrinking, which leads to reduced system reliability and increased manufacturing costs.

[0003] In the field of heat exchangers, thanks to the independence of heat exchange tubes, ease of processing, and a variety of methods, methods for enhancing heat dissipation inside the tubes are relatively mature. Techniques such as internal tube slotting, increasing tube diameter variations, and adding baffles and flow-turbulence devices are very common. However, in the field of cold plates, cold plates are highly coupled with electronic equipment structures, exhibiting complex dimensional characteristics and high integration. How to overcome the contradiction between the large size of cold plates and the precision of heat dissipation fins using conventional processing methods, while simultaneously enhancing heat dissipation and simplifying cold plate design and processing, has become a prominent challenge in current cold plate design. Summary of the Invention

[0004] To address the existing technical problems, this invention provides a low-cost deep-hole cold plate design method based on spiral-enhanced heat dissipation.

[0005] The specific content of this invention is as follows: A low-cost deep-hole cold plate design method based on spiral enhanced heat dissipation, the cold plate includes a cold plate body, a spiral turbulence device, a first plug, a second plug, an interconnected plug, and an internal baffle. The cold plate body is provided with a deep-hole flow channel. One end of the cold plate is provided with a first plug and a second plug, and the other end is provided with a second plug and an interconnected plug, so that the two flow channels are interconnected. The inner side of the interconnected plug is provided with an internal baffle. The plug and the baffle realize the serpentine interconnection of fluid inside the cold plate. The spiral turbulence device is set in the flow channel.

[0006] Furthermore, the spiral turbulence device is fixed to the centerline of the cylindrical deep-hole flow channel by a central mounting rod.

[0007] Furthermore, the spiral turbulence device includes a support rod and a turbulence plate. The support rod is divided into a dense turbulence region, a sparse turbulence region, and a smooth rod region by different densities of the guide vanes on the turbulence plate. The two ends of the support rod are fixed to the plug by mounting threads.

[0008] Furthermore, the angle θ between the guide vanes and the fluid flow direction is 20~60°.

[0009] Furthermore, the inner wall of the flow channel is designed with concave helical teeth, the thread direction of which is consistent with the threaded flow disturbance device, and the thread period is consistent with or an integer multiple of the threaded flow disturbance device.

[0010] Furthermore, a spiral heat dissipation fin is designed, which is located near the extension line of the spiral fin of the spiral turbulence device. The spiral turbulence device periodically forces the fluid towards the spiral heat dissipation fin.

[0011] Furthermore, the spiral heat dissipation fins include a threaded mounting structure and reinforced heat dissipation fins. The threaded mounting structure cooperates with the concave spiral fins inside the cold plate body, and the reinforced heat dissipation fins consist of multiple fins arranged in parallel.

[0012] Furthermore, the threaded mounting structure has the same dimensions as the concave thread inside the cold plate body, and an interference fit is achieved by screwing in the cold assembly method.

[0013] Furthermore, the internal baffle is inserted into the cold plate body through an interference fit, and the first plug, the second plug, and the interconnecting plug are welded by electron beam welding.

[0014] This invention improves heat dissipation efficiency by assembling a spiral turbulence device within the flow channel, thereby enhancing the three-dimensional fluid organization and heat dissipation area within the cold plate flow channel. Conventional manufacturing methods can be used to design a series of heat dissipation cold plates tailored to different heat dissipation requirements, achieving not only improved heat dissipation efficiency but also reduced design and manufacturing costs. Attached Figure Description

[0015] The invention will be further explained below with reference to the accompanying drawings.

[0016] Figure 1 This is a cross-sectional view of the cold plate assembly of the present invention;

[0017] Figure 2 This is a schematic diagram of the main structure installation.

[0018] Figure 3 This is a schematic diagram of a spiral flow control device.

[0019] Figure 4 Diagram of the flow channel for the concave threaded tooth plate;

[0020] Figure 5 This is a diagram illustrating the effect of spiral-enhanced convection.

[0021] Figure 6 This is a schematic diagram of a spiral heat dissipation tooth structure;

[0022] Figure 7 This is a schematic diagram of the installation of spiral heat sink fins;

[0023] Figure 8 This is a schematic diagram of the cross-section of the inter-tooth impact jet;

[0024] Figure 9 This is a cross-sectional view showing the fit between the spiral heat dissipation fins and the cold plate.

[0025] The components include: 1. Cold plate main structure; 2. Spiral turbulence device; 3, 4. Plugs; 5. Interconnected plugs; 6. Internal baffles; 7. Cold plate flow channel inlet and outlet; 8. Flange threaded holes; 9. Mounting threads; 10. Support rods; 11. Turbulence plates; 12. Enhanced turbulence area; 13. Sparse turbulence area; 14. Unenhanced turbulence area on smooth rods; 15. Concave spiral teeth; 16. Spiral heat dissipation teeth; 17. Threaded mounting structure; 18. Enhanced heat dissipation teeth. Detailed Implementation

[0026] Example 1

[0027] Combination Figures 1-4 This invention provides a low-cost deep-hole cold plate design method based on spiral enhanced heat dissipation. By assembling a spiral turbulence device inside the flow channel, a three-dimensional fluid organization is achieved in the flow channel space of the cold plate, thereby improving heat dissipation efficiency.

[0028] Specifically, such as Figures 1-2 As shown, the cold plate includes a cold plate body 1, a spiral turbulence device 2, a first plug 3, a second plug 4, an interconnected plug 5, and an internal baffle 6. The cold plate body has a deep-hole flow channel inside. One end of the cold plate is provided with a first plug and a second plug, and the other end is provided with a second plug and an interconnected plug 5, so that the two flow channels are interconnected. The inner side of the interconnected plug 5 is provided with an internal baffle 6. The plug and the baffle realize the serpentine interconnection of fluid inside the cold plate. The spiral turbulence device is set in the flow channel.

[0029] In this embodiment, the cold plate has three flow channels. The first plug 3 and the interconnecting plug 5 can block two flow channels, and the second plug 4 can block one flow channel. The interconnecting plug 5 contains an internal flow channel, enabling interconnection between the two flow channels. Figure 1 and 2 As shown, inlet and outlet ports 7 for the cold plate flow channels are provided at both ends of the cold plate body for the coolant to flow in and out. Flange threaded holes 8 are provided on these ports for connection to other equipment. Taking a specific cooling process as an example, the coolant flows in from the left-side inlet and outlet port 7 of the cold plate flow channel, flows through the first flow channel, enters the second flow channel through the gap formed on the left side of the internal baffle 6, and then enters the third flow channel through the gap on the right side of the first plug 3. At the end of the third flow channel, it flows out through the internal flow channel of the interconnecting plug 5. The outlet of the internal flow channel of the interconnecting plug 5 is connected to the right-side inlet and outlet port 7 of the cold plate flow channel, allowing the coolant to flow out from there.

[0030] In this preferred embodiment, the internal baffle 6 is inserted into the cold plate body 1 by interference fit, the interconnecting plug 5 contains an internal flow channel to realize the interconnection between the two flow channels, and the first plug 3, the second plug 4 and the interconnecting plug 5 are welded by electron beam welding to achieve flow channel sealing.

[0031] The main body of the cold plate adopts a deep-hole drilling flow channel design, constructing the required cooling area through a simple serpentine flow channel. The serpentine flow channel mainly serves to transport the cooling fluid, delivering the cooling medium to the required parts. Baffles and plugs, as well as interconnected plugs, serve to seal externally and connect different flow channels. The baffles are assembled with an interference fit, and the plugs provide external sealing. They are interconnected with the cold plate body through welding.

[0032] The spiral turbulence device 2 enhances heat dissipation by increasing fluid turbulence within the flow channel. It is installed on the centerline of the deep-hole flow channel of the cold plate, and its structure and installation are as follows: Figures 3-4 As shown, the spiral turbulence device includes a support rod 10 and a turbulence plate 11. The turbulence plate 11 is spirally mounted on the support rod 10, and both ends of the support rod 10 are fixed to the plug by mounting threads. After the fluid is guided by the spiral turbulence device 2, it is directed to the surrounding wall of the flow channel, and the convective heat transfer is enhanced through the impact jet effect.

[0033] While enhancing system heat dissipation, the helical flow deflector also increases flow resistance. To avoid excessively high system flow resistance, the helical flow deflector is designed with non-uniformity: the thread density is high in areas requiring enhanced heat dissipation, low in areas with normal heat exchange, and no thread deflector design is used in areas where heat dissipation is not required but only for fluid interconnection. This achieves enhanced heat dissipation while rationally allocating resources and reducing system flow resistance. Taking the helical flow deflector in the third flow channel as an example, the support rod 10 is divided into a densely dense enhanced flow deflection region 12, a sparse flow deflection region 13, and a smooth rod region 14 by the different densities of the guide vanes on the deflector plate 11.

[0034] The guide vanes form an angle θ of 20~60° with the direction of fluid flow, which forces the fluid to rotate and impact the flow channel wall and the heat dissipation fins.

[0035] Low-speed flow within a cylindrical channel is typically laminar, with a relatively stable boundary layer on the channel sidewalls. Therefore, conventional deep-hole flow cooling plates exhibit low heat dissipation efficiency. This invention assembles a spiral flow-enhancing device within the channel, positioned in the center of the deep-hole channel. This device forcibly guides the fluid within the channel to avoid convection, disrupting the boundary layer while simultaneously achieving localized impact jets. This effectively enhances the local convective heat transfer coefficient, and its spiral-enhanced convection effect is as follows: Figure 5 As shown.

[0036] Example 2

[0037] Compared with Embodiment 1, this embodiment adds a concave helical toothed plate 15, while the other technical features are the same and will not be described again here.

[0038] like Figure 5 As shown, to meet the high heat flux density heat dissipation requirements, a concave spiral toothed plate 15 is designed on the inner wall of the deep-hole flow channel to further increase the heat exchange area. Through machining methods such as boring, the heat dissipation area inside the flow channel is increased. The thread direction is consistent with the embedded turbulence device, and the period is an integer multiple of the turbulence device. The fluid is forced into the gaps between the concave spiral toothed plates through guiding the flow, thereby enhancing heat dissipation.

[0039] Example 3

[0040] Compared with Example 2, this embodiment adds a spiral heat dissipation fin 16, while the other technical features are the same and will not be described again here.

[0041] like Figures 6-9 As shown, when faced with a further increase in heat flux density, the heat dissipation area of ​​the conventional concave spiral toothed plate is insufficient to meet the heat dissipation requirements. Therefore, it is considered to supplement the heat dissipation by adding spiral heat dissipation teeth. The spiral heat dissipation teeth are located near the extension line of the spiral teeth in the spiral turbulence device, which periodically forces the fluid towards the spiral heat dissipation teeth.

[0042] Spiral heat dissipation tooth structure as follows Figure 6 As shown. The spiral heat dissipation fin 16 includes a threaded mounting structure 17 and a top reinforced heat dissipation fin 18. The threaded mounting structure cooperates with the concave spiral fin 15 inside the cold plate body. The reinforced heat dissipation fin 18 consists of multiple fins arranged in parallel. The spiral heat dissipation fin 16 is screwed into the cold plate body 1 by its root thread. After the fluid is guided by the spiral turbulence device 2, it impacts the spiral heat dissipation fin 16, thereby achieving enhanced heat dissipation.

[0043] The heat dissipation fins mainly serve to increase the heat dissipation area and the convective heat transfer coefficient. Spiral heat dissipation fins are mass-produced at low cost through precision casting, powder metallurgy, additive manufacturing, and tooth cutting. They are assembled with the main cold plate through interference fit.

[0044] The installation relationship of the spiral heat sink fins is as follows: Figure 7 As shown, the threaded mounting structure 17 mates with the concave thread inside the cold plate body, with consistent thread pitch and other dimensions. An interference fit is achieved through a screw-in installation method using a cold assembly technique. Reinforced heat dissipation fins are used to increase the heat exchange area and optimize heat dissipation.

[0045] Figure 8 The diagram shows the inter-tooth impact jet. The spiral heat dissipation tooth 16 and the spiral turbulence device 2 work together. After the fluid is guided by the spiral turbulence device 2, the fluid is forced to push towards the spiral heat dissipation tooth 16, forming a local impact jet effect and achieving efficient convection heat dissipation.

[0046] The mating relationship between the spiral heat dissipation fins 16 and the cold plate is as follows: Figure 9As shown, the cold plate and the spiral heat dissipation fins are fitted with an interference fit, and both expand in volume under high-temperature conditions to achieve a tighter fit. By adjusting the threaded fixing structure between the embedded spiral heat dissipation fins and the cold plate body, the cold plate and the spiral heat dissipation fins can adaptively achieve further interference compression under high temperatures, reducing contact thermal resistance while ensuring structural performance, and further improving the heat dissipation effect under high temperatures.

[0047] This invention significantly reduces the manufacturing cost of cold plates by achieving enhanced heat dissipation design based on deep-hole drilling cold plates, which have extremely low processing difficulty. Compared to conventional welded cold plates, the processing volume and complexity of the main body of the cold plate of this invention are greatly reduced. Large-size cold plates require fewer processing features. The finely designed spiral heat dissipation fins and spiral airflow device can be formed using low-cost methods such as powder metallurgy and casting, and are mechanically assembled with the cold plate body, which helps to significantly reduce the manufacturing cost of cold plates.

[0048] This invention improves the liquid cooling reliability of cold plates. The main channel area adopts a deep-hole drilling method, which eliminates the need for welding, reduces the risk of leakage, and enhances the reliability of liquid cooling.

[0049] This invention is beneficial for increasing the turbulence within the cold plate and enhancing heat dissipation. By using a spiral-enhanced heat dissipation method, it strengthens the turbulent disturbance inside the cold plate, increases the convective heat transfer coefficient, and enhances the heat dissipation effect.

[0050] This invention is beneficial for increasing the heat exchange area inside the cold plate and enhancing heat dissipation. By processing concave spiral teeth inside the flow channel and assembling spiral heat dissipation teeth, the heat dissipation area is greatly increased, thus enhancing the heat dissipation effect.

[0051] This invention is beneficial for enhancing the local convective heat transfer coefficient of the toothed plate and improving heat dissipation. The spiral heat dissipation toothed plate and the spiral turbulence device work together. The turbulence device periodically forces the fluid to push towards the heat dissipation toothed plate, forming a local impact jet effect. This achieves a dual improvement in heat dissipation area and heat transfer coefficient in the local area of ​​the heat dissipation toothed plate, which can greatly improve the heat dissipation effect.

[0052] This invention helps to reduce the contact thermal resistance between the cold plate and the toothed plate, and enhance heat dissipation. By adjusting the threaded fixing structure between the spiral heat dissipation toothed plate and the cold plate body, the volume expansion of the cold plate body and the spiral heat dissipation toothed plate at high temperature can adaptively achieve further interference compression between the two, reducing the contact thermal resistance. This ensures assembly performance, improves high-temperature heat dissipation performance, and increases heat dissipation redundancy.

[0053] This invention is beneficial for improving the versatility and serialization of cold plates. For different heat source distributions, the main body of the cold plate can adopt the same design. Only by changing the form and position of the spiral heat dissipation fins and the spiral turbulence device, the heat source in different distribution positions can be enhanced and adjusted as needed.

[0054] Many specific details have been set forth in the foregoing description to provide a thorough understanding of the present invention. However, the above description is merely a preferred embodiment of the present invention, and the present invention can be implemented in many other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed above. Furthermore, any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, using the methods and techniques disclosed above, without departing from the scope of the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, shall still fall within the protection scope of the present invention.

Claims

1. A low-cost deep-hole cold plate design method based on spiral-enhanced heat dissipation, characterized in that: The cold plate includes a cold plate body, a spiral flow disturbance device, a first plug, a second plug, an interconnected plug, and an internal baffle. The cold plate body has a deep-hole flow channel inside. One end of the cold plate is provided with a first plug and a second plug, and the other end is provided with a second plug and an interconnected plug, so that the two flow channels are interconnected. The inner side of the interconnected plug is provided with an internal baffle. The plug and the baffle realize the serpentine interconnection of fluid inside the cold plate. The spiral flow disturbance device is set in the flow channel.

2. The low-cost deep-hole cold plate design method based on spiral-enhanced heat dissipation as described in claim 1, characterized in that: The spiral turbulence device is fixed to the centerline of the cylindrical deep-hole flow channel by a central mounting rod.

3. The low-cost deep-hole cold plate design method based on spiral-enhanced heat dissipation as described in claim 1, characterized in that: The spiral turbulence device includes a support rod and a turbulence plate. The support rod is divided into a dense turbulence region, a sparse turbulence region, and a smooth rod region by different densities of the guide vanes on the turbulence plate. The two ends of the support rod are fixed to the plug by mounting threads.

4. The low-cost deep-hole cold plate design method based on spiral-enhanced heat dissipation as described in claim 3, characterized in that: The angle θ between the guide vane and the direction of fluid flow is 20~60°.

5. The low-cost deep-hole cold plate design method based on spiral-enhanced heat dissipation as described in claim 1, characterized in that: The inner wall of the flow channel is designed with concave helical teeth, the thread direction of which is consistent with the threaded flow disturbance device, and the thread period is consistent with or an integer multiple of the threaded flow disturbance device.

6. The low-cost deep-hole cold plate design method based on spiral-enhanced heat dissipation as described in claim 5, characterized in that: The design incorporates spiral heat dissipation fins located near the extension line of the spiral fins in the spiral turbulence device. The spiral turbulence device periodically forces the fluid towards the spiral heat dissipation fins.

7. The low-cost deep-hole cold plate design method based on spiral-enhanced heat dissipation as described in claim 6, characterized in that: The spiral heat dissipation fins include a threaded mounting structure and reinforced heat dissipation fins. The threaded mounting structure cooperates with the concave spiral fins inside the cold plate body, and the reinforced heat dissipation fins consist of multiple fins arranged in parallel.

8. The low-cost deep-hole cold plate design method based on spiral-enhanced heat dissipation as described in claim 7, characterized in that: The threaded mounting structure has the same dimensions as the internal concave thread inside the cold plate body. An interference fit is achieved by screwing in the cold assembly method.

9. The low-cost deep-hole cold plate design method based on spiral-enhanced heat dissipation according to claim 1, characterized in that: The internal baffle is inserted into the cold plate body by interference fit, and the first plug, the second plug and the interconnecting plug are welded by electron beam welding.

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