Liquid-cooled refrigerant plate and cooling device

Abstract

The utility model discloses a liquid cooling refrigerating plate, wherein the liquid cooling refrigerating plate includes the cold plate body of setting up containing the first, second flow channel of mutual close and isolation, wherein the first flow channel passes into the first cooling working medium that can happen gas -liquid phase change, and the second flow channel passes into the second cooling working medium that keeps liquid phase, and two working medium flow in the counter current mode. This counter current arrangement can most effectively adjust heat flow distribution, and through the control heat conduction, the excessive evaporation of first cooling working medium at the end of flow channel is inhibited, and its dryness is stabilized in the appropriate range of high -efficient heat exchange, thereby avoid the occurrence of " dry " phenomenon, ensure that first cooling working medium can maintain the high -efficient phase change heat exchange capacity on the whole flow channel length.

Description

Technical Field

[0001] This utility model relates to the field of temperature control technology for electronic devices, and in particular to a liquid-cooled refrigeration plate and cooling device. Background Technology

[0002] In existing two-phase liquid-cooled heat exchanger technology, the cooling medium absorbs heat generated by electronic components within the flow channel, undergoing a phase change through boiling or evaporation. It then utilizes its latent heat of vaporization to dissipate a significant amount of heat, achieving efficient cooling. However, this efficient heat dissipation process is accompanied by an inherent technical challenge: as the medium flows forward along the flow channel and continues to absorb heat, its internal gas phase content, or "dryness," continuously increases. When the heat load on the cold plate is high or the medium flow rate is insufficient, the medium can easily reach excessively high dryness at the end of the flow channel, even evaporating completely. At this point, the gaseous medium forms a "gas plug" or covers the heat transfer surface, preventing the liquid medium from effectively wetting the hot surface, resulting in "drying" or "film boiling." This drastically degrades the heat transfer method from efficient nucleation boiling to inefficient convective heat transfer or simple conduction, leading to a significant decrease in the heat transfer coefficient and overall heat dissipation efficiency. It may even trigger localized hot spots, causing thermal failure of electronic components. Therefore, there is an urgent need for a liquid-cooled refrigeration plate to solve the problem that the heat exchange efficiency of existing two-phase liquid-cooled refrigeration plates is insufficient due to excessive evaporation. Utility Model Content

[0003] The present invention provides a liquid-cooled refrigeration plate and a cooling device, which aims to solve the problem that the heat exchange efficiency of the existing two-phase liquid-cooled refrigeration plate is insufficient due to excessive evaporation.

[0004] In a first aspect, this utility model provides a liquid-cooled refrigeration plate, comprising: a cold plate body, wherein a first flow channel and a second flow channel are provided within the cold plate body, the first flow channel and the second flow channel being close to and isolated from each other; a first cooling medium flowing in the first flow channel along a first direction; and a second cooling medium flowing in the second flow channel along a second direction; wherein the first cooling medium can undergo a gas-liquid phase change within a preset operating temperature range, and the second cooling medium remains in a liquid phase within the preset operating temperature range, and the first direction is opposite to the second direction.

[0005] In the liquid-cooled refrigeration plate provided by this utility model, a base surface is defined on the cold plate body, and the first flow channel and the second flow channel are both formed by recessing along the base surface on the opposite side of the base surface, with the first flow channel being more recessed than the second flow channel.

[0006] In the liquid-cooled refrigeration plate provided by this utility model, the cold plate body is provided with a plurality of first and second flow channels that are spaced apart from each other and arranged in a parallel array.

[0007] The liquid-cooled refrigeration plate provided by this utility model also includes a manifold plate connected to the cold plate body. The manifold plate is provided with a first manifold inlet, a second manifold inlet, a first manifold outlet, and a second manifold outlet. The first manifold inlet and the first manifold outlet are respectively connected to the two ends of each of the first flow channels, and the second manifold inlet and the second manifold outlet are respectively connected to the two ends of each of the second flow channels.

[0008] In the liquid-cooled refrigeration plate provided by this utility model, the manifold further includes a first baffle and a second baffle. The first baffle is disposed between the first diversion inlet and the second flow channel, and / or, the first baffle is disposed between the second diversion inlet and the first flow channel; the second baffle is disposed between the first collection outlet and the second flow channel, and / or, the second baffle is disposed between the second collection outlet and the first flow channel.

[0009] The liquid-cooled refrigeration plate provided by this utility model also includes a working fluid interaction port group, which is provided with a first working fluid inlet, a first working fluid outlet, a second working fluid inlet and a second working fluid outlet. The first working fluid inlet and the first working fluid outlet are respectively connected to the first diversion inlet and the first collection outlet, and the second working fluid inlet and the second working fluid outlet are respectively connected to the second diversion inlet and the second collection outlet.

[0010] The liquid-cooled refrigeration plate provided by this utility model also includes a cover plate, which is disposed on the side of the manifold away from the cold plate body. The first working fluid inlet, the first working fluid outlet, the second working fluid inlet, and the second working fluid outlet are respectively disposed on the cover plate.

[0011] The liquid-cooled refrigeration plate provided by this utility model also includes an inlet bypass shut-off valve and an outlet bypass shut-off valve. The first working fluid inlet and the second working fluid inlet are connected to the inlet bypass shut-off valve, and the first working fluid outlet and the second working fluid outlet are connected to the outlet bypass shut-off valve.

[0012] The liquid-cooled refrigeration plate provided by this utility model further includes a first flow regulating valve, a second flow regulating valve, a third flow regulating valve, and a fourth flow regulating valve. The first working fluid inlet is connected to the first flow regulating valve, the second working fluid inlet is connected to the third flow regulating valve, the first working fluid outlet is connected to the second flow regulating valve, and the fourth flow regulating valve is connected to the fourth flow regulating valve.

[0013] Secondly, this utility model provides a cooling device, including the aforementioned liquid-cooled refrigeration plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In the technical solution of this utility model, a cold plate body comprising a first and a second flow channel that are close to each other and isolated is provided. The first flow channel is filled with a first cooling medium capable of undergoing a gas-liquid phase change, while the second flow channel is filled with a second cooling medium that maintains a liquid phase. The two cooling media flow in a counter-current manner. This counter-current arrangement can most effectively regulate the heat flow distribution. By controlling heat conduction, excessive evaporation of the first cooling medium at the end of the flow channel is suppressed, and its dryness is stabilized within a suitable range for efficient heat exchange, thereby avoiding the occurrence of "drying out" and ensuring that the first cooling medium maintains efficient phase change heat exchange capacity throughout the entire length of the flow channel. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is an exploded view of the liquid-cooled refrigeration plate according to an embodiment of the present invention;

[0018] Figure 2 This is a front view of the liquid-cooled refrigeration plate according to an embodiment of the present invention;

[0019] Figure 3 This is a top view of the cold plate body of the liquid-cooled refrigeration plate according to an embodiment of the present utility model;

[0020] Figure 4 This is a top view of the manifold of the liquid-cooled refrigeration plate in an embodiment of this utility model;

[0021] Figure 5 This is a top view of the cover plate of the liquid-cooled refrigeration plate according to an embodiment of the present utility model;

[0022] Figure 6 This is a schematic diagram of the working fluid flow direction of the cold plate body of the liquid-cooled refrigeration plate in an embodiment of this utility model;

[0023] Figure 7 This is a schematic diagram of the cooling device according to an embodiment of the present invention;

[0024] Figure 8 This is a partially enlarged structural diagram A of the corresponding area of ​​the liquid-cooled refrigeration plate in the cooling device of this utility model embodiment.

[0025] Figure label explanation:

[0026] 10. Cold plate body; 11. First flow channel; 12. Second flow channel; 13. First direction; 14. Second direction;

[0027] 20. Diverter plate; 211. First diverter inlet; 212. Second diverter inlet; 231. First collector outlet; 232. Second collector outlet; 251. First baffle; 252. Second baffle;

[0028] 30. Cover plate; 31. Connecting hole;

[0029] 40. Working medium interaction port group; 411. First working medium inlet; 412. First working medium outlet; 431. Second working medium inlet; 432. Second working medium outlet;

[0030] 51. Inlet bypass shut-off valve; 52. Outlet bypass shut-off valve; 531. First flow regulating valve; 532. Second flow regulating valve; 533. Third flow regulating valve; 534. Fourth flow regulating valve;

[0031] 60. Liquid-cooled refrigeration plate. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0034] This invention provides a liquid-cooled refrigeration plate, which aims to solve the problem that the heat exchange efficiency of existing two-phase liquid-cooled refrigeration plates is insufficient due to excessive evaporation.

[0035] Reference Figures 1 to 8The liquid-cooled refrigeration plate 60 of this utility model includes: a cold plate body 10, wherein a first flow channel 11 and a second flow channel 12 are provided inside the cold plate body 10, the first flow channel 11 and the second flow channel 12 are close to each other and isolated from each other; a first cooling medium flows in the first flow channel 11 along a first direction 13; and a second cooling medium flows in the second flow channel 12 along a second direction 14. The first cooling medium can undergo a gas-liquid phase change within a preset operating temperature range, and the second cooling medium remains in a liquid phase within the preset operating temperature range. The first direction 13 and the second direction 14 are opposite. The liquid-cooled refrigeration plate 60 adopts a layered structure, consisting of a cold plate body 10, a manifold 20, and a cover plate 30 stacked sequentially and connected by a sealing structure. The first flow channel 11 and the second flow channel 12 are formed inside the cold plate body 10. The first flow channel 11 and the second flow channel 12 are arranged parallel along the length direction within the bottom plate and are physically isolated by the flow channel walls to ensure that the working fluids flowing through them do not mix. Meanwhile, the first flow channel 11 and the second flow channel 12 are spatially "close to each other," creating an effective heat conduction path between the two channels, thus achieving thermal coupling. In this embodiment, the first cooling medium is a refrigerant capable of undergoing a gas-liquid phase change, such as R134a or R245fa. After entering the first flow channel 11 within its normal operating temperature range, it absorbs heat from the high-power electronic components below, undergoes a boiling phase change, and efficiently removes heat using latent heat. Simultaneously, the second cooling medium is a single-phase coolant that remains liquid within the same operating temperature range, such as an aqueous solution of ethylene glycol. It is introduced into the second flow channel 12 and exchanges heat solely through sensible heat absorption. Figure 6 The flow directions of the working fluids are shown. The first cooling working fluid flows from left to right in the first flow channel 11 along the "first direction 13," while the second cooling working fluid flows from right to left in the second flow channel 12 along the "second direction 14," forming a counter-flow arrangement. This counter-flow design ensures that when the second cooling working fluid, which has the lowest temperature, enters the second flow channel 12, it is directly opposite the outlet region of the first cooling working fluid, which has already completed most of its heat absorption, has the highest dryness, and the highest temperature. This effectively suppresses excessive evaporation at the end of the first cooling working fluid through the heat conduction effect inside the cold plate, stabilizing its dryness within the efficient heat exchange range. Specifically, under high-temperature conditions, the second cooling working fluid can be replaced with a nanofluid, such as an Al2O3-water suspension, utilizing its high thermal conductivity to enhance the stabilization effect on the dryness of the two-phase working fluids.

[0036] In one embodiment, a base surface is defined on the cold plate body 10, and the first flow channel 11 and the second flow channel 12 are both recessed along the base surface on the opposite side of the base surface, with the first flow channel 11 being more recessed than the second flow channel 12.

[0037] The cold plate base is formed from metal material through CNC milling or precision casting. On its upper surface, both the first flow channel 11 and the second flow channel 12 are recessed inwards along the thickness direction of the base plate, sharing the same machining datum surface, namely the top surface of the cold plate body 10. During machining, the first flow channel 11 is machined to a deeper depth than the second flow channel 12; that is, the cross-sectional depth of the first flow channel 11 is greater than that of the second flow channel 12. This is to allow the first flow channel 11 to accommodate phase change volume changes. The greater depth of the first flow channel 11 provides expansion space for the two-phase working fluid vaporization process, preventing gas phase blockage of the flow channel. Simultaneously, the deeper recess brings the bottom of the first flow channel 11 closer to the heat source mounting surface, i.e., the cold plate body 10, shortening the heat transfer path. The shallow depth design of the second flow channel 12 ensures that the single-phase working fluid maintains a high-speed turbulent state, enhancing convective heat transfer. Furthermore, to reduce the flow dead zone in the gas-liquid two-phase flow, the bottom of the first flow channel 11 has a rounded transition with the adjacent wall surface.

[0038] In one embodiment, the cold plate body 10 is provided with a plurality of first flow channels 11 and second flow channels 12 that are spaced apart from each other and arranged in a parallel array.

[0039] Multiple first flow channels 11 and multiple second flow channels 12 maintain a uniform spacing, forming a parallel array to cover a larger chip heat dissipation area, achieving uniform heat flow distribution and efficient heat removal. This array layout, in conjunction with the first diversion inlet 211, second diversion inlet 212, first collection outlet 231, second collection outlet 232, and first baffle 251 and second baffle 252 on the manifold 20, allows the first and second cooling working fluids to be evenly distributed to all corresponding first flow channels 11 and second flow channels 12 through their respective diversion inlets, thereby avoiding hot spot problems caused by uneven local flow. Simultaneously, because the first flow channels 11 are more deeply recessed, they form a deeper microchannel structure in the array, suitable for boiling heat exchange of two-phase working fluids, while the shallower second flow channels 12 serve as counter-current control channels for single-phase working fluids, allowing the single-phase working fluid to simultaneously absorb heat from both phases of the working fluid through the channel walls, thus maintaining a tight thermal coupling relationship between the first flow channels 11 and second flow channels 12.

[0040] In one embodiment, the liquid-cooled cooling plate 60 further includes a manifold 20 connected to the cooling plate body 10. The manifold 20 is provided with a first diversion inlet 211, a second diversion inlet 212, a first collection outlet 231, and a second collection outlet 232. The first diversion inlet 211 and the first collection outlet 231 are respectively connected to the two ends of each of the first flow channels 11, and the second diversion inlet 212 and the second collection outlet 232 are respectively connected to the two ends of each of the second flow channels 12.

[0041] The manifold 20 is precision-machined from a thermally conductive metal sheet and is tightly fitted to the cold plate body 10 via a sealing gasket. The manifold 20 has a first diversion inlet 211, a second diversion inlet 212, a first collection outlet 231, and a second collection outlet 232. The first diversion inlet 211 is connected to the inlet ends of all the first flow channels 11, and is used to evenly distribute the externally input first cooling working fluid into each parallel first flow channel 11. The first collection outlet 231 is connected to the outlet ends of all the first flow channels 11, and is used to collect and uniformly discharge the gas-liquid two-phase working fluid after the heat absorption phase change. Correspondingly, the second diversion inlet 212 is connected to the inlet ends of all the second flow channels 12, and is used to introduce the second cooling working fluid into each second flow channel 12. The second collection outlet 232 is connected to the outlet ends of all the second flow channels 12, and is used to collect and discharge the single-phase working fluid after the counter-current heat exchange. The structural design of the manifold 20 ensures uniform distribution of the working fluid in both the first channel 11 and the second channel 12 of the multi-channel array, avoiding local overheating or flow instability caused by uneven flow distribution. The manifold 20 is reliably sealed to the cold plate base and cover plate 30 via gaskets and fasteners, preventing leakage and mixing between different working fluids. In practical implementation, each inlet and outlet on the manifold 20 is connected to the working fluid inlet or outlet through internally machined branch channels, forming a tree-like or comb-like flow distribution / collection network to optimize fluid dynamics performance and reduce pressure drop.

[0042] The diversion and distribution plate 20 is further provided with a first baffle 251 and a second baffle 252. The first baffle 251 is disposed between the first diversion inlet 211 and the second flow channel 12, and / or the first baffle 251 is disposed between the second diversion inlet 212 and the first flow channel 11; the second baffle 252 is disposed between the first collection outlet 231 and the second flow channel 12, and / or the second baffle 252 is disposed between the second collection outlet 232 and the first flow channel 11.

[0043] The first baffle 251 comprises two functional zones. Located between the first diversion inlet 211 and the second flow channel 12, the first baffle 251 prevents the single-phase working fluid from permeating into the two-phase flow channel. Located between the second diversion inlet 212 and the first flow channel 11, the first baffle 251 prevents the gaseous phase diffusion of the two-phase working fluid into the single-phase inlet region. The second baffle 252 also comprises two functional zones. Located between the first collection outlet 231 and the second flow channel 12, it guides the efficient collection of the gas-liquid mixture. Located between the second collection outlet 232 and the first flow channel 11, the second baffle 252 prevents the two-phase working fluid from flowing back and contaminating the single-phase outlet. The function of the first baffle 251 is to prevent the first cooling working medium, which undergoes a gas-liquid phase change and enters from the first diversion inlet 211, from laterally diffusing to the adjacent second flow channel 12 due to pressure or flow inertia before entering the first flow channel 11 during the working medium diversion stage; at the same time, it prevents the second cooling working medium, which remains in liquid phase and enters from the second diversion inlet 212, from accidentally flowing into the first flow channel 11, ensuring that the two working media are completely isolated in the initial distribution stage. The function of the second baffle 252 is to prevent the gas-liquid two-phase working medium flowing out of the first flow channel 11 from flowing across to the second flow channel 12 side before reaching the first collection outlet 231 during the working medium collection stage, or to prevent the single-phase working medium flowing out of the second flow channel 12 from entering the first collection outlet 231 or the area of ​​the first flow channel 11 during the confluence process, thereby avoiding working medium mixing and flow interference.

[0044] In one embodiment, a working fluid interaction port group 40 is also included, which has a first working fluid inlet 411, a first working fluid outlet 412, a second working fluid inlet 431, and a second working fluid outlet 432. The first working fluid inlet 411 and the first working fluid outlet 412 are respectively connected to the first diversion inlet 211 and the first collection outlet 231, and the second working fluid inlet 431 and the second working fluid outlet 432 are respectively connected to the second diversion inlet 212 and the second collection outlet 232. The liquid-cooled cooling plate 60 also includes a cover plate 30, which is disposed on the side of the diversion and collection plate 20 away from the cooling plate body 10. The first working fluid inlet 411, the first working fluid outlet 412, the second working fluid inlet 431, and the second working fluid outlet 432 are respectively disposed on the cover plate 30.

[0045] The cover plate 30 is located on the side of the manifold 20 away from the cold plate body 10, i.e., at the top of the entire cold plate structure, and together with the cold plate body 10, it clamps and seals the manifold 20. Its lower surface is tightly fitted to the manifold 20 and is fixedly connected by bolts, clips, or welding. A sealing gasket or sealant is applied at the connection interface to ensure the overall structure's airtightness. The working fluid interaction port group 40 consists of four standardized interfaces located above the cover plate 30, and is connected by four corresponding connection holes 31 on the cover plate 30. The working fluid interaction port group 40 includes a first working fluid inlet 411, a first working fluid outlet 412, a second working fluid inlet 431, and a second working fluid outlet 432. Its positional layout precisely corresponds to and is connected layer by layer to the first diversion inlet 211, the first collection outlet 231, the second diversion inlet 212, and the second collection outlet 232 on the lower manifold 20. After the cold plate body 10, the manifold 20, and the cover plate 30 are assembled in sequence, the first working fluid inlet 411 (III-1) is connected to the first diversion inlet 211 through the connecting hole 31 on the cover plate 30. This is used to introduce and distribute the first cooling working fluid, which undergoes a gas-liquid phase change, transported from the external pipeline, into each of the first flow channels 11. The first working fluid outlet 412 is connected to the first collection outlet 231, used to export the gas-liquid two-phase working fluid after the phase change and heat absorption to an external system, such as a gas-liquid separator or compressor. Correspondingly, the second working fluid inlet 431 is connected to the second diversion inlet 212, used to introduce the second cooling working fluid, which maintains a liquid phase, into each of the second flow channels 12. The second working fluid outlet 432 is connected to the second collection outlet 232, used to discharge the single-phase working fluid after countercurrent heat exchange. Each standardized interface can adopt a standard pipe thread interface or a quick-connect fitting for easy connection and reliable sealing through a sealing ring.

[0046] In one embodiment, the liquid-cooled cooling plate 60 further includes an inlet bypass shut-off valve 51 and an outlet bypass shut-off valve 52. The first working fluid inlet 411 and the second working fluid inlet 431 are connected to the inlet bypass shut-off valve 51, and the first working fluid outlet 412 and the second working fluid outlet 432 are connected to the outlet bypass shut-off valve 52.

[0047] An inlet bypass valve 51 is installed on the pipeline connected to the working fluid inlet of the liquid-cooled refrigeration plate 60, with its two ends connected to the upstream pipelines of the first working fluid inlet 411 and the second working fluid inlet 431, forming a controllable bypass channel. Correspondingly, an outlet bypass valve 52 is installed on the pipeline connected to the working fluid outlet, with its two ends connected to the downstream pipelines of the first working fluid outlet 412 and the second working fluid outlet 432. When the inlet bypass valve 51 and the outlet bypass valve 52 are closed, the first cooling working fluid enters the first flow channel 11 only through the first working fluid inlet 411, and the second cooling working fluid enters the second flow channel 12 only through the second working fluid inlet 431. The two working fluids flow in their respective independent flow channels and achieve counter-current thermal coupling. The liquid-cooled refrigeration plate 60 operates in a "single-phase and two-phase mixed heat exchange mode." At this time, the second cooling working fluid effectively regulates the dryness of the first cooling working fluid through the counter-current arrangement, ensuring efficient and stable heat exchange. When the inlet bypass valve 51 and the outlet bypass valve 52 are opened simultaneously, the first working fluid inlet 411 and the second working fluid inlet 431 are connected through the bypass valves, and the first working fluid outlet 412 and the second working fluid outlet 432 are also connected. At this time, the same type of working fluid can be introduced into the first working fluid inlet 411 and the second working fluid inlet 431 simultaneously, allowing it to flow through the first flow channel 11 and the second flow channel 12 respectively for phase change heat absorption. The liquid-cooled cooling plate 60 switches to a "pure two-phase heat exchange mode," suitable for high-load, high-heat-fluidity chip conditions to maximize heat dissipation. Conversely, a single-phase coolant can be introduced into both flow channels simultaneously to achieve a "pure single-phase heat exchange mode," suitable for system startup, low-power operation, or emergency heat dissipation during two-phase system failures. This bypass valve structure allows for seamless switching of operating modes through simple valve operation, significantly improving the adaptability of the cooling plate and system-level reliability. In practical implementation, the bypass valve can be manually or electrically controlled, facilitating integration into automated control systems. Furthermore, the bypass valve can be used in conjunction with a pressure balancing pipe or a silencer structure to reduce fluid shock and pressure fluctuations at the moment of valve opening, thereby improving system operational stability. In addition, this design can be linked with an external control unit to automatically determine and switch operating modes based on feedback signals such as chip temperature and working fluid dryness, achieving intelligent thermal management.

[0048] In one embodiment, the liquid-cooled refrigeration plate 60 further includes a first flow regulating valve 531, a second flow regulating valve 532, a third flow regulating valve 533, and a fourth flow regulating valve 534. The first working fluid inlet 411 is connected to the first flow regulating valve 531, the second working fluid inlet 431 is connected to the third flow regulating valve 533, the first working fluid outlet 412 is connected to the second flow regulating valve 532, and the fourth flow regulating valve 534 is connected to the fourth flow regulating valve 534.

[0049] The first flow regulating valve 531 is located in the upstream pipeline of the first working fluid inlet 411 and is used to regulate the flow rate of the first cooling working fluid, which undergoes a gas-liquid phase change, entering the first flow channel 11. The third flow regulating valve 533 is located in the upstream pipeline of the second working fluid inlet 431 and is used to regulate the flow rate of the second cooling working fluid, which remains in the liquid phase, entering the second flow channel 12. By independently controlling the first and third flow regulating valves 531 and 533, the ratio of the two-phase working fluid to the single-phase working fluid can be dynamically adjusted according to the actual heat load, ensuring efficient heat dissipation while avoiding overcooling or wasted pump power. The second flow regulating valve 532 is located in the downstream pipeline of the first working fluid outlet 412 and is used to regulate the backflow resistance of the first cooling working fluid and the system back pressure. The fourth flow regulating valve 534 is located in the downstream pipeline of the second working fluid outlet 432 and is used to regulate the outlet pressure and flow stability of the second cooling working fluid. The flow regulating valves at the outlet end help balance the system pressure drop and prevent flow instability or uneven gas-liquid separation caused by sudden changes in outlet pressure. In practical implementation, each flow regulating valve can be in the form of a needle valve, an electric proportional valve, or a solenoid valve, which facilitates integration with the control system and enables closed-loop feedback regulation. For example, based on the temperature or pressure sensor signal at the outlet of the first working fluid 412, the opening of the first flow regulating valve 531 is automatically adjusted to maintain the dryness of the first cooling working fluid in the cold plate within the optimal heat exchange range, avoiding drying out or overcooling.

[0050] This utility model also discloses a cooling device, which uses the liquid-cooled refrigeration plate 60 of the above embodiments as the core heat dissipation unit, and integrates an external circulation system and control components to form a complete thermal management solution. Specifically, the cooling device includes a liquid-cooled refrigeration plate 60, a main heat exchanger, a refrigerant pump, a gas-liquid separator, a compressor, a secondary heat exchanger, a liquid pump, a radiator, and multiple control valves, and realizes the switching and coordinated control of multiple working fluid paths according to different operating modes. In the mixed heat exchange mode, the two-phase refrigerant is throttled and depressurized by the electronic expansion valve, and enters the first flow channel 11 of the liquid-cooled refrigeration plate 60 in a low-temperature and low-pressure gas-liquid two-phase state. After absorbing heat from the chip, it becomes a low-pressure gas phase or a gas-liquid mixture, which is discharged through the first working fluid outlet 412 and enters the gas-liquid separator. The single-phase coolant, driven by a liquid pump, is cooled by a radiator and then enters the second flow channel 12 of the liquid-cooled refrigeration plate 60. It flows counter-currently, stabilizing the dryness of the two-phase working fluid in the first flow channel 11 through thermal coupling. After absorbing heat and heating up, it returns to the radiator through the second working fluid outlet 432 for further cooling. The gas-liquid separator separates the working fluid from the first flow channel 11 into a saturated liquid and a superheated gas. The liquid portion is pressurized and circulated by a refrigerant pump after passing through a storage tank, while the gas portion enters the compressor for pressurization and heating. After condensation into a high-pressure liquid by the secondary heat exchanger, it returns to the front end of the electronic expansion valve, completing the two-phase cycle. In pure two-phase heat exchange mode, by opening the inlet bypass shut-off valve 51 and the outlet bypass shut-off valve 52, both phases of refrigerant simultaneously enter the first flow channel 11 and the second flow channel 12 through the first working fluid inlet 411 and the second working fluid inlet 431. Both flow channels participate in phase change heat absorption, significantly improving the overall heat dissipation capacity. In pure single-phase heat exchange mode, the two-phase circulation path is closed, and only the liquid pump is used to drive the single-phase coolant to flow through both flow channels simultaneously, achieving simple and reliable single-phase cooling. This cooling device integrates multiple valves and pumps, enabling flexible switching of operating modes and adaptive adjustment of operating conditions. In an extended embodiment, the cooling device can be equipped with an intelligent control module to collect signals such as chip temperature, inlet and outlet working fluid temperature and pressure in real time, automatically determine the current heat load status, and dynamically adjust the opening of each flow regulating valve, switch the bypass valve status, or start and stop different pumps to achieve optimal energy efficiency and precise temperature control. In addition, the device can be modularly designed, with the liquid-cooled cooling plate 60 as a replaceable unit, which can be adapted to electronic devices of different sizes and thermal design power. It can be widely used in high heat flux density scenarios such as high-performance computing servers, artificial intelligence accelerator cards, and high-power power electronic modules, significantly improving the heat dissipation performance and operational reliability of the system.

[0051] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A liquid-cooled refrigeration plate, characterized in that, include: The cold plate body has a first flow channel and a second flow channel, which are close to each other and isolated from each other. The first cooling medium flows in the first flow channel along the first direction; The second cooling medium flows in the second direction within the second flow channel; The first cooling medium can undergo a gas-liquid phase change within a preset operating temperature range, while the second cooling medium remains in a liquid phase within the preset operating temperature range. The first direction is opposite to the second direction.

2. The liquid-cooled refrigeration plate according to claim 1, characterized in that, The cold plate body has a base surface defined on it. The first flow channel and the second flow channel are both formed by recessing along the base surface on the opposite side of the base surface. The first flow channel is more recessed than the second flow channel.

3. The liquid-cooled refrigeration plate according to claim 2, characterized in that, The cold plate body is provided with multiple first and second flow channels that are spaced apart from each other and arranged in a parallel array.

4. The liquid-cooled refrigeration plate according to claim 3, characterized in that, It also includes a manifold plate connected to the cold plate body. The manifold plate is provided with a first manifold inlet, a second manifold inlet, a first manifold outlet, and a second manifold outlet. The first manifold inlet and the first manifold outlet are respectively connected to the two ends of each of the first flow channels, and the second manifold inlet and the second manifold outlet are respectively connected to the two ends of each of the second flow channels.

5. The liquid-cooled refrigeration plate according to claim 4, characterized in that, The flow distribution plate is further provided with a first baffle and a second baffle. The first baffle is disposed between the first flow distribution inlet and the second flow channel, and / or the first baffle is disposed between the second flow distribution inlet and the first flow channel. The second baffle is disposed between the first flow outlet and the second flow channel, and / or the second baffle is disposed between the second flow outlet and the first flow channel.

6. The liquid-cooled refrigeration plate according to claim 5, characterized in that, It also includes a working fluid interaction port group, which has a first working fluid inlet, a first working fluid outlet, a second working fluid inlet and a second working fluid outlet. The first working fluid inlet and the first working fluid outlet are respectively connected to the first diversion inlet and the first collection outlet, and the second working fluid inlet and the second working fluid outlet are respectively connected to the second diversion inlet and the second collection outlet.

7. The liquid-cooled refrigeration plate according to claim 6, characterized in that, It also includes a cover plate, which is disposed on the side of the manifold away from the cold plate body, and the first working fluid inlet, the first working fluid outlet, the second working fluid inlet and the second working fluid outlet are respectively disposed on the cover plate.

8. The liquid-cooled refrigeration plate according to claim 6, characterized in that, It also includes an inlet bypass shut-off valve and an outlet bypass shut-off valve, with the first working medium inlet and the second working medium inlet connected to the inlet bypass shut-off valve, and the first working medium outlet and the second working medium outlet connected to the outlet bypass shut-off valve.

9. The liquid-cooled refrigeration plate according to claim 6, characterized in that, It also includes a first flow regulating valve, a second flow regulating valve, a third flow regulating valve, and a fourth flow regulating valve. The first working medium inlet is connected to the first flow regulating valve, the second working medium inlet is connected to the third flow regulating valve, the first working medium outlet is connected to the second flow regulating valve, and the fourth flow regulating valve is connected to the fourth flow regulating valve.

10. A cooling device, characterized in that, Includes the liquid-cooled refrigeration plate as described in any one of claims 1 to 9.

Images