Phase change coupled liquid cooling plate

Abstract

The utility model relates to the technical field of electronic equipment heat dissipation, disclose a phase change coupling liquid cooling plate, including first casing subassembly and second casing subassembly, first casing subassembly is sealedly connected with second casing subassembly, its characterized in that, second casing subassembly includes second casing, and the Hilbert curve flow channel is equipped in second casing inside, the Hilbert curve flow channel includes first Hilbert curve flow channel and second Hilbert curve flow channel, and the flow channel series of first Hilbert curve flow channel is greater than second Hilbert curve flow channel;First casing subassembly includes first casing and the phase change layer fixed in the inside surface of first casing, the phase change layer covers on the Hilbert curve flow channel of second casing, forms the passage for the circulation of cooling liquid, the liquid cooling plate of the utility model realizes the high -efficient, uniform heat dissipation effect through the combination of zoned multi -step gradient Hilbert curve flow channel and phase change coupling heat transfer technology.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology for electronic devices, specifically a phase change coupled liquid cooling plate. Background Technology

[0002] Currently, liquid cooling plates are widely used in the field of electronic device heat dissipation as a highly efficient heat dissipation method. Traditional liquid cooling plates are mainly made of aluminum alloy, and their internal flow channels are mostly straight, spiral, or simply curved. However, due to the limitations of the material's thermal conductivity and the flow channel design, traditional liquid cooling plates are difficult to effectively cool small heat sources or heat sources with high heat flux density, especially in high-power electronic devices, where the heat dissipation problem of local hot spots is particularly prominent.

[0003] While existing liquid cooling plate designs employing phase change heat transfer devices exist, their flow channel structures remain relatively simple, resulting in short liquid flow paths and limited heat exchange efficiency. Furthermore, traditional flow channel designs struggle to maximize heat exchange area within a limited space, thus limiting improvements in heat dissipation performance. Utility Model Content

[0004] The purpose of this invention is to provide a phase change coupled liquid cooling plate that, through an innovative “partitioned multi-stage Hilbert curve topology structure-phase change layer synergistic heat transfer mechanism” and “non-uniform heat dissipation characteristics”, adopts a material design of copper inner layer and aluminum outer layer in the flow channel and sets different order flow channels according to the heat generation situation, extends the liquid flow path and enhances the turbulence effect, and, combined with the efficient heat diffusion capability of the phase change heat transfer device, significantly improves the heat dissipation efficiency of the liquid cooling plate.

[0005] The technical solution of this utility model is: A phase change coupled liquid cooling plate includes a second housing assembly and a first housing assembly, the second housing assembly being sealed to the first housing assembly. The second housing assembly includes a second housing, inside which is provided a Hilbert curve flow channel. The Hilbert curve flow channel includes a first Hilbert curve flow channel located in the central region and a second Hilbert curve flow channel located in the surrounding region. The number of flow stages in the first Hilbert curve flow channel is greater than the number of flow stages in the second Hilbert curve flow channel. The second housing is provided with an inlet and an outlet communicating with the Hilbert curve flow channel. The first housing assembly includes a first housing and a phase change layer fixed to the inner surface of the first housing. The phase change layer covers the Hilbert curve flow channel of the second housing, forming a channel for coolant flow.

[0006] Preferably, as a further improvement of this utility model, the sidewall of the Hilbert curve flow channel is composed of a first layer material and a second layer material, wherein the first layer material is in contact with the coolant, the first layer material is copper, and the second layer material is aluminum.

[0007] Preferably, as a further improvement of this utility model, the first Hilbert curve flow channel is of second order or above, and the second Hilbert curve flow channel is of first order.

[0008] Preferably, as a further improvement of this utility model, the first housing assembly and the second housing assembly are fastened together by bolts, and an elastic sealing assembly is provided at the connection surface of the first housing assembly and the second housing assembly. The elastic sealing assembly includes an annular sealing groove, a sealing ring and a fastener. The annular sealing groove is fixed on the second housing, the sealing ring is embedded in the sealing groove, and the fastener passes through the first housing, the sealing ring and the second housing.

[0009] Preferably, as a further improvement of this utility model, the outer surface of the first housing opposite to the second housing is provided with a plurality of heat dissipation protrusions for contacting the heat source, and the height of the heat dissipation protrusions is 0.5mm to 2mm.

[0010] Preferably, as a further improvement of this utility model, the material of the first shell is a copper-based or aluminum-based alloy phase change material.

[0011] Preferably, as a further improvement of this utility model, the cross-sectional shape of the Hilbert curve flow channel is circular, rectangular or trapezoidal.

[0012] Preferably, as a further improvement of this utility model, the material of the second housing is aluminum alloy, copper alloy or stainless steel.

[0013] Preferably, as a further improvement of this utility model, the surface of the Hilbert curve flow channel is precision machined and electropolished, and the surface roughness is controlled to Ra≤1.6μm.

[0014] This invention proposes an innovative liquid-cooled plate structure. By integrating a partitioned, multi-stage gradient Hilbert curve flow channel with a metal-based phase-change heat transfer device, it achieves the simultaneous utilization of the advantages of two efficient heat transfer methods without adding additional structural components. The liquid-cooled plate comprises two core components: a second shell and a first shell. The second shell internally incorporates partitioned, multi-stage Hilbert curve flow channels. The inner layer of these channels contacts the cooling medium, made of copper, while the outer layer is made of aluminum, ensuring good thermal conductivity without making the liquid-cooled plate too heavy. Furthermore, considering the uneven heating characteristics of the battery, a second-stage Hilbert curve flow channel is used in the high-heat-generating central region, while a first-stage Hilbert curve flow channel is used in the low-heat-generating peripheral region. This multi-stage meandering structure significantly extends the liquid flow path and increases the heat exchange area. The number of flow channel stages can be flexibly adjusted according to heat dissipation requirements to achieve a longer flow path and higher heat exchange efficiency. The flow channel cross-section adopts a gradient design, with the cross-sectional area gradually decreasing from the inlet to the outlet to maintain a reasonable flow velocity distribution. The flow channel surface undergoes precision machining and electropolishing to ensure that the surface roughness is controlled within Ra≤1.6μm, effectively reducing flow resistance.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This invention proposes a phase change coupled liquid cooling plate, employing a partitioned multi-stage Hilbert curve flow channel coupled with a phase change layer design. The flow channels of the second shell are configured according to the heat flux density differences of the heat source, with a high-order Hilbert curve flow channel in the center and a low-order flow channel around the perimeter. In high heat flux density regions, a more complex flow channel extends the liquid flow path, enhances turbulence, and improves local heat transfer capacity. In low heat flux density regions, excessive flow channel design is avoided, maximizing the heat exchange area within a limited space. This overcomes the limitations of material thermal conductivity and flow channel design, solving the problem of difficulty in cooling small or high heat flux density heat sources. The phase change layer inside the first shell covers the flow channels, achieving isothermal heat transfer through solid-liquid phase change, rapidly dissipating heat. This, combined with the partitioned multi-stage Hilbert flow channel, enhances heat exchange, further eliminating local hot spots and solving the problem of prominent local hot spots. Simultaneously, the second shell assembly is sealed to the first shell assembly, forming a closed channel for coolant flow, ensuring stable operation of the heat dissipation system, thereby further improving heat dissipation efficiency and better meeting the heat dissipation requirements of high-power electronic devices.

[0016] The liquid cooling plate based on partitioned multi-stage gradient Hilbert curve flow channel of this invention is particularly suitable for liquid cooling heat dissipation devices for high power density electronic components, such as chips, power semiconductors, and power batteries. By combining partitioned multi-stage gradient Hilbert curve flow channel and phase change coupling heat transfer technology, it achieves efficient and uniform heat dissipation effect. Attached Figure Description

[0017] Figure 1This is a three-dimensional structural diagram of the liquid cooling plate based on the partitioned multi-level gradient Hilbert curve flow channel of this utility model.

[0018] Figure 2 This is a three-dimensional structural diagram of the second shell and flow channel of a liquid cooling plate based on a partitioned multi-level gradient Hilbert curve flow channel.

[0019] Figure 3 This is a top view of the second shell and flow channel of a liquid cooling plate based on a partitioned multi-level gradient Hilbert curve flow channel.

[0020] Figure 4 This is a top view of the sealing ring of a liquid cooling plate based on a partitioned multi-gradient Hilbert curve flow channel.

[0021] Figure 5 This is a three-dimensional structural diagram of the first shell of a liquid cooling plate based on a partitioned multi-level gradient Hilbert curve flow channel.

[0022] Figure 6 This is a bottom view of the first shell and phase change layer of a liquid cooling plate based on a partitioned multi-gradient Hilbert curve flow channel.

[0023] Figure 7 This is a cross-sectional view of the first shell and phase change layer of a liquid cooling plate based on a partitioned multi-level gradient Hilbert curve flow channel.

[0024] Explanation of reference numerals in the attached figures: 1-Inlet; 2-Outlet; 3-Hilbert curve flow channel; 4-Sealing groove; 5-Second housing; 6-Sealing ring; 7-Threaded hole; 8-Phase change layer; 9-First housing; 10-Bolt. Detailed Implementation

[0025] The following is combined with Figures 1 to 7 The specific embodiments of this utility model will be described in detail below. In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of a utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] Traditional liquid cooling plate flow channel designs, such as straight and spiral channels, suffer from limited heat exchange area and short flow paths, making it difficult to meet the heat dissipation requirements of high-power equipment. While existing technologies employ fractal channels or phase change materials, their combination is typically structurally complex and fails to fully utilize the latent heat characteristics of phase change materials and the turbulence-enhancing effect of fractal channels. Therefore, this invention proposes an innovative liquid cooling plate structure. By coupling a partitioned multi-stage gradient Hilbert curve flow channel with a metal-based phase change heat transfer device, the structure is simple and achieves the advantages of two efficient heat transfer methods simultaneously without adding additional structural components. Regarding thermal performance and temperature uniformity, the partitioned multi-stage Hilbert curve flow channel ensures the flow remains in the development stage, with continuous boundary layer renewal. The phase change material achieves isothermal heat transfer through solid-liquid phase change, and the synergistic effect of both increases the heat transfer efficiency by 60%–80% compared to traditional liquid cooling plates. Furthermore, the isothermal characteristics of the phase change material control the surface temperature difference of the heat source within ±2℃, far superior to the ±12℃ of traditional solutions, effectively eliminating local hot spots. In terms of structural performance, the multi-stage partitioned flow channel can increase the heat exchange area by more than 40% in the same volume, and the integrated design saves the independent packaging space of traditional phase change modules. The composite structure of phase change material and metal matrix avoids material migration problems; all connection parts adopt anti-loosening design, with excellent vibration resistance; the combination design of inner copper and outer aluminum in the flow channel improves the stability of the structure while ensuring performance. The inner copper layer of the flow channel ensures high thermal conductivity, which can quickly transfer heat to the coolant, while the outer aluminum layer effectively controls the overall mass of the liquid cooling plate, making it easier to install and use; different stages of flow channels are set according to the uneven heating characteristics of the battery. Second-stage flow channels are used in the middle area with high heat generation to enhance heat dissipation capacity, while first-stage flow channels are used in the perimeter area with low heat generation to avoid resource waste and maximize heat dissipation efficiency. In terms of manufacturing, the flow channel can be processed using standardized molds, the phase change material filling process is mature and has a high yield rate, the assembly process can be semi-automated, the modular interface facilitates system integration and maintenance, and the multiple sealing design ensures no leakage under 1MPa working pressure.

[0028] Example like Figures 1 to 7As shown, this embodiment of the invention provides a liquid cooling plate based on a partitioned multi-stage gradient Hilbert channel, including a second housing 5 and a first housing 9. The second housing 5 has a Hilbert curve channel 3 inside. The Hilbert curve channel 3 is configured as follows: a first Hilbert curve channel is used in the central region corresponding to high heat flux density, and a second Hilbert curve channel is used in the edge region corresponding to low heat flux density. The number of flow stages in the first Hilbert curve channel is greater than that in the second Hilbert curve channel. The first Hilbert curve channel has two flow stages, and the second Hilbert curve channel has one flow stage. The second housing 5 has an inlet 1 and an outlet 2 communicating with the Hilbert curve channel 3. The edge of the second housing 5 is sealed to the edge of the first housing 9. A phase change layer 8 is fixed to the surface of the first housing 9 facing the second housing 5. The phase change layer 8 seals over the Hilbert curve channel 3 of the second housing 5, forming a closed channel for coolant flow.

[0029] The Hilbert curve flow channel 3 is composed of a first layer of material and a second layer of material, wherein the first layer of material is in contact with the coolant, the first layer of material is copper, and the second layer of material is aluminum. Specifically, the Hilbert curve flow channel 3 is composed of an inner layer and an outer layer, wherein the inner layer is made of copper and the outer layer is made of aluminum; the first Hilbert curve flow channel is of the second order or higher, and the second Hilbert curve flow channel is of the first order; the first housing 9 and the second housing 5 are fastened together by bolts 10, and an elastic sealing component is provided at the joint surface; the elastic sealing component includes an annular sealing groove 4 fixed to the second housing 5, a sealing ring 6 embedded in the sealing groove 4, and a threaded hole 7 penetrating the first housing 9, the sealing ring 6, and the second housing 5; the outer surface of the first housing 9 away from the second housing 5 is provided with multiple heat dissipation protrusions for contact with the heat source, and the height of the heat dissipation protrusions is 0.5-2mm; the material of the first housing 9 is a copper-based or aluminum-based alloy phase change material; the cross-sectional shape of the Hilbert curve flow channel 3 is circular, rectangular, or trapezoidal; the material of the second housing 5 is aluminum alloy, copper alloy, or stainless steel; the surface of the Hilbert curve flow channel 3 is precision machined and electropolished, and the surface roughness is controlled to Ra≤1.6μm.

[0030] The specific implementation details are as follows: Implementation details of the first housing assembly: The first housing assembly is configured as a phase change heat transfer device, including a first housing 9 and a phase change layer 8 fixed to the lower surface of the first housing 9, which directly serves as a sealing cover for the liquid cooling plate. The first housing 9 is a metal substrate, made of copper or aluminum alloy with a thermal conductivity ≥200W / (m·K). An array of heat dissipation protrusions is machined on its upper surface by CNC milling. The diameter of the heat dissipation protrusions is Φ2~5mm, and the height of the heat dissipation protrusions is 0.5~2mm, with a height tolerance controlled within ±0.03mm, to increase the contact area with the heat source. The lower surface of the metal substrate is sintered using powder metallurgy to form a capillary core structure with a pore size of 100~150μm. A phase change working medium (water or ammonia) is then injected into the sintered capillary core structure using a vacuum impregnation and sealing process, with a filling rate controlled at 90%. The area of ​​the capillary core structure filled with the phase change working medium is the phase change layer 8. The edge area of ​​the lower surface of the metal substrate is precision ground to a predetermined flatness and smoothness, which perfectly matches the edge of the second housing 5. It is then fastened together by bolts 10 to form a direct heat transfer path without additional interfaces.

[0031] Thermal interface optimization: The heat dissipation protrusion array is CNC milled to ensure a height tolerance of ±0.05mm; the top of the heat dissipation protrusion can be plated with gold or silver to further reduce contact thermal resistance.

[0032] Implementation details of the second housing assembly: The second housing assembly includes a second housing 5 with an internal Hilbert curve flow channel 3. The second housing 5 has an inlet 1 and an outlet 2. Liquid flows in through the inlet 1, passes through the Hilbert curve flow channel 3, and exits through the outlet 2. The material of the second housing 5 is aluminum alloy, copper alloy, or stainless steel. The inner layer of the Hilbert curve flow channel 3 is made of copper, and the outer layer is made of aluminum, bonded together by a high-temperature rolling composite process to ensure good bonding strength and thermal conductivity. When processing the multi-stage Hilbert curve topology flow channel, based on battery heating simulation results, a second-stage Hilbert curve flow channel is processed in the central high-heat region, and a first-stage Hilbert curve flow channel is processed in the surrounding low-heat regions. This multi-stage meandering structure extends the liquid flow path and increases the heat exchange area. The number of stages of the Hilbert curve flow channel can be adjusted according to heat dissipation requirements, typically one, two, or more stages, to achieve a longer flow path and higher heat exchange efficiency, ensuring that the flow channel layout matches the heat dissipation conditions and achieving efficient heat dissipation. The cross-sectional shape of the flow channel can be rectangular, trapezoidal or circular. This utility model shows a circular flow channel, and the specific dimensions are designed according to the coolant flow rate and heat dissipation requirements.

[0033] Implementation details of the sealing assembly: The first housing assembly and the second housing assembly are fastened together. An elastic sealing assembly is provided at the connection surface of the first housing assembly and the second housing assembly. The elastic sealing assembly includes an annular sealing groove 4, a sealing ring 6, and a fastener. The annular sealing groove 4 is fixed to the second housing 5, the sealing ring 6 is embedded in the sealing groove 4, and the fastener penetrates the first housing 9, the sealing ring 6, and the second housing 5. Specifically, the elastic sealing assembly includes an annular sealing groove 4, a sealing ring 6, and a threaded hole 7. The annular sealing groove 4 is fixed to the second housing 5, the sealing ring 6 is embedded in the annular sealing groove 4, and the sealing ring 6 is made of rubber or other elastic waterproof material. The threaded hole 7 penetrates the first housing 9, the sealing ring 6, and the second housing 5, and is fastened together by bolts 10 to ensure a tight seal. The depth and width of the sealing groove 4 match the size of the sealing ring 6, ensuring that the sealing ring 6 can fully fill the gaps in the groove during assembly, forming an effective seal.

[0034] The sealing assembly uses a V-shaped cross-section fluororubber sealing ring 6, embedded in a laser-engraved sealing groove 4, and achieves a reliable seal through a progressive bolt tightening process 10. During assembly, a Φ2mm locating pin is first used for initial positioning, and then the M4 bolts 10 are tightened in three stages in a diagonal sequence, with the final torque controlled at 5±0.2 N·m. The sealing groove 4 is designed with a trapezoidal cross-section and is designed with allowance for elastic deformation compensation to ensure no leakage under a working pressure of 1MPa. A pressure balance channel is set in the phase change layer 8 area to compensate for pressure fluctuations caused by changes in the volume of the phase change working fluid.

[0035] Implementation details of the connection method: The first housing 9 of the liquid-cooled plate, the sealing ring 6, and the second housing 5 of the liquid-cooled plate are connected by bolts 10. The number and distribution of bolts 10 are designed according to the housing size and sealing requirements. The threaded hole 7 can be a countersunk hole or a through hole. The countersunk hole design makes the head of the bolt 10 flush with the housing surface to avoid interfering with other components.

[0036] This invention couples a partitioned, multi-stage Hilbert curve topology with a copper-based or aluminum-based alloy phase change heat transfer device. This allows for heat diffusion through the phase change of the metal itself without requiring additional structural components for the cooling device. This design simplifies the heat dissipation system architecture while retaining the high efficiency of phase change heat transfer. The first housing 9, combined with the phase change layer 8, can directly function as a phase change heat transfer device. The liquid-cooled first housing 9 uses a high thermal conductivity phase change material (such as a copper-based or aluminum-based alloy), and its surface in contact with the heat source has multiple heat dissipation protrusions to increase the contact area and improve heat conduction efficiency. The working principle of the phase change heat transfer device is as follows: when heat from the heat source is transferred to the phase change layer 8, the phase change material absorbs heat and undergoes a phase change, rapidly diffusing the heat to the entire first housing 9, which is then carried away by the coolant in the flow channel. The copper-based or aluminum-based alloy phase change layer 8 and the Hilbert curve flow channel 3 are integrated, directly absorbing heat from the heat source and transferring it to the coolant, thus constituting active heat dissipation.

[0037] The partitioned multi-stage Hilbert curve flow channel 3 of this invention is milled using a five-axis CNC machining center with contour milling, employing a Φ3mm carbide end mill. Machining efficiency is optimized through recursive toolpath programming. A 0.5mm transition fillet is provided at the flow channel corners to avoid stress concentration. For the flow channel structure with an inner copper layer and an outer aluminum layer, a high-temperature rolling composite process is used to ensure a tight bond between the two layers while maintaining controllable costs. The phase change layer 8 is manufactured using a "one-time clamping and machining" process, simultaneously completing capillary core sintering and working fluid infusion in a vacuum brazing furnace to avoid secondary contamination. Before assembly, the contact surfaces undergo plasma activation treatment to improve welding quality, and finally, a helium mass spectrometry leak test is performed to ensure sealing performance.

[0038] The Hilbert curve flow channel 3 is directly integrated with the phase change layer 8. This integrated design eliminates the space required for a separate phase change module, resulting in high volume utilization and a 40% increase in heat exchange area. The phase change material achieves near-isothermal heat transfer, with the surface temperature difference of the heat source controlled within ±2℃, far superior to traditional solutions (±12℃), effectively eliminating local hot spots. It supports multiple cooling media (water, ethylene glycol, etc.), offering strong compatibility and modular interfaces for easy integration. Unlike other fractal structures that are only used for heat storage without optimizing flow characteristics, this invention achieves synergy between flow and heat transfer, featuring a multi-stage, zoned Hilbert curve flow channel 3. Actively enhancing turbulence, the phase change layer 8 accelerates heat diffusion, providing dual-enhanced heat dissipation; unlike other complex anti-flow column structures that may increase flow resistance, this invention allows for flow resistance control, with a gradually changing cross-section flow channel and a low-roughness surface balancing heat transfer efficiency and pressure drop; unlike other large-volume heat storage devices suitable for fixed scenarios, this invention is compact and portable, with a flat liquid cooling plate design that adapts to the miniaturization needs of electronic devices; unlike other systems that rely on external fluid circulation systems, this invention is self-contained, integrating inlet / outlet ports, and can be directly connected to existing liquid cooling circuits without additional components.

[0039] This utility model discloses a liquid cooling plate based on a partitioned multi-stage gradient Hilbert curve flow channel. The partitioned multi-stage flow channel design extends the liquid path and enhances the turbulence effect. It includes a second housing 5 of the liquid cooling plate with an internal Hilbert curve flow channel 3 and a phase change heat transfer upper cover sealed to the second housing 5. The second housing 5 has an inlet 1 for the cooling medium to flow in and an outlet 2 for the cooling medium to flow out. The internal flow channel adopts a partitioned multi-stage Hilbert curve topology, with the inner layer of the flow channel being copper and the outer layer being aluminum. Furthermore, considering the uneven heating characteristics of the battery, a second-stage Hilbert curve flow channel is used in the high-heat-generating central region, while a first-stage Hilbert curve flow channel is used in the low-heat-generating peripheral region, enabling efficient and uniform heat exchange within a limited space. The first housing 9 and the second housing 5 of the liquid cooling plate form a sealed cavity, with the Hilbert curve flow channel 3 and the phase change layer 8 located inside the sealed cavity. This design enhances convective heat transfer efficiency through the high surface area and low flow resistance of the Hilbert curve flow channel 3, while combining the latent heat absorption capacity of the phase change material to achieve dual heat dissipation enhancement: on the one hand, the fractal flow channel optimizes fluid distribution and heat exchange, and on the other hand, the phase change material rapidly equalizes the temperature and stores heat, significantly improving the heat dissipation performance and temperature uniformity of high power density electronic components.

[0040] This invention, based on a partitioned multi-stage gradient Hilbert curve flow channel, offers numerous advantages for expanding the application of liquid cooling plates. **Scenario Adaptability:** Leveraging the uneven heating characteristics of batteries, the partitioned flow channel, with its varying order, forms a partitioned multi-stage Hilbert curve topology, adaptable to different heat dissipation power requirements. Changing the phase change material type allows for matching different operating temperature ranges. The external dimensions can be flexibly customized to fit various installation spaces. **System Compatibility:** Seamlessly integrates with existing liquid cooling systems; supports multiple cooling media (water, glycol solution, fluorinated liquid, etc.); and provides a standard electrical interface for sensor signal output.

[0041] The above-disclosed embodiments are merely preferred embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A phase change coupled liquid cooling plate, comprising a first housing assembly and a second housing assembly, wherein the first housing assembly and the second housing assembly are sealed together, characterized in that, The second housing assembly includes a second housing (5), and the interior of the second housing (5) is provided with a Hilbert curve flow channel (3). The Hilbert curve flow channel (3) includes a first Hilbert curve flow channel located in the central region and a second Hilbert curve flow channel located in the surrounding region. The number of flow channel stages of the first Hilbert curve flow channel is greater than the number of flow channel stages of the second Hilbert curve flow channel. The first housing assembly includes a first housing (9) and a phase change layer fixed to the inner surface of the first housing (9). The phase change layer (8) covers the Hilbert curve flow channel (3) of the second housing (5) to form a channel for coolant to flow.

2. The phase change coupled liquid cooling plate according to claim 1, characterized in that, The first Hilbert curve flow channel has a flow channel order of second order or higher, and the second Hilbert curve flow channel has a flow channel order of first order.

3. The phase change coupled liquid cooling plate according to claim 1, characterized in that, The sidewall of the Hilbert curve flow channel (3) is composed of a first layer of material and a second layer of material, wherein the first layer of material is in contact with the coolant, the first layer of material is copper, and the second layer of material is aluminum.

4. The phase change coupled liquid cooling plate according to claim 1, characterized in that, The surface roughness of the Hilbert curve flow channel (3) is ≤1.6μm.

5. The phase change coupled liquid cooling plate according to claim 1, characterized in that, The first housing assembly and the second housing assembly are fastened together. An elastic sealing assembly is provided at the connection surface of the first housing assembly and the second housing assembly. The elastic sealing assembly includes an annular sealing groove (4), a sealing ring (6) and a fastener. The annular sealing groove (4) is fixed on the second housing (5). The sealing ring (6) is embedded in the sealing groove (4). The fastener passes through the first housing (9), the sealing ring (6) and the second housing (5).

6. The phase change coupled liquid cooling plate according to claim 1, characterized in that, The outer surface of the first housing (9) is provided with multiple heat dissipation protrusions, the height of which is 0.5mm to 2mm.

7. The phase change coupled liquid cooling plate according to claim 1, characterized in that, The material of the first housing (9) is a copper-based alloy or an aluminum-based alloy.

8. The phase change coupled liquid cooling plate according to claim 1, characterized in that, The cross-sectional shape of the Hilbert curve flow channel (3) is circular, rectangular or trapezoidal.

9. The phase change coupled liquid cooling plate according to claim 1, characterized in that, The material of the second housing (5) is aluminum alloy, copper alloy or stainless steel.

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