Direct cooling plate

Abstract

The direct cooling plate comprises a cooling plate body and a connector, the cooling plate body comprises a flat plate and a flow channel plate, a flow channel is formed between the flat plate and the flow channel plate, a refrigerant flows in the flow channel of the flow channel plate and achieves heat exchange with a cooled object through the flat plate, and a first pipeline and a second pipeline are formed in the connector. The first pipeline and the second pipeline are respectively used for leading in and leading out a refrigerant, a static swirling element is arranged in the first pipeline, gas-liquid separation is realized on a gas-liquid mixed refrigerant entering the joint by utilizing the structure of the static swirling element, a liquid-phase branch and a gas-phase branch are respectively formed at the rear end of the first pipeline, and a separated liquid phase flows into the liquid-phase flow channel through the liquid-phase branch for circulation; the gas phase is guided by the gas phase guide pipe to enter the gas phase branch and then flows out through the gas phase flow channel and the second pipeline or directly flows out through the second pipeline, so that the gas-liquid separation effect is good and the efficiency is high; the refrigerant is subjected to gas-liquid separation, and the gas phase is directly guided out without participating in heat exchange, so that the energy consumption is effectively reduced, and the system safety is improved.

Description

Technical Field

[0001] The present invention relates to the field of new energy power batteries, and in particular to a direct cooling plate. Background Art

[0002] With the rapid development of electric vehicles, battery cooling technology has received more and more attention. Battery heat dissipation includes air cooling, liquid cooling and refrigerant direct cooling. The working principle of direct cooling is similar to that of air conditioning, which mainly realizes heat transfer and heat dissipation through the phase change of refrigerant. The direct cooling system has gradually become the main development trend of battery thermal management system because it omits the intermediate heat exchange process of liquid, reduces thermal resistance, and has excellent heat transfer performance and compact system structure. At present, the direct cooling system has been applied in many new energy vehicles, especially the role of direct cooling plate in battery heat exchange has also attracted widespread attention.

[0003] Compared with the single-phase heat exchange of the liquid cooling plate, there is a two-phase flow state (gas-liquid mixed state) inside the direct cooling plate, and the flow pattern is complex. In fact, only the process of liquid phase conversion to gas phase in the cold plate can achieve the purpose of heat exchange. The gas phase can basically not play a role in heat exchange in the cold plate. Instead, it will occupy the volume flow entering the cold plate, which will cause increased energy consumption, large inlet and outlet temperature difference, and prone to uneven gas-liquid distribution. The gas phase accounts for too much in the local flow channel, resulting in overheating and affecting the safety of the battery system.

[0004] Based on the above problems, there are two solutions: one is to increase the subcooling degree to above 30°C, to ensure that the refrigerant after the expansion valve is in a subcooled state of 1-2°C, to solve the problem of the gas phase, but it is difficult to meet the requirements due to the external ambient temperature; the other is to separate the gas and liquid phases, and only the liquid refrigerant enters the heat dissipation area. Patent CN117219924A proposes a structural model, but its structure actually does not have the gas-liquid separation function. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a direct cooling plate that can realize the function of refrigerant gas-liquid separation and improve its cooling efficiency.

[0006] To achieve the above objectives and other related objectives, the present invention provides a direct cooling plate, comprising:

[0007] A cold plate body, wherein a flow channel is formed in the cold plate body;

[0008] A connector is connected to the flow channel, and the connector includes:

[0009] A joint body, wherein the joint body is provided with a joint inlet and a joint outlet;

[0010] A first pipeline, one end of which is connected to the joint inlet, and the other end of which is formed with a liquid phase branch and a gas phase branch;

[0011] a second pipeline, one end of which is connected to the joint outlet, and the other end of which is connected to the flow channel;

[0012] A static spinning element is arranged at one end of the first pipeline close to the joint inlet;

[0013] The gas phase conduit is arranged at one end of the first pipeline away from the static swirling element, and has a diameter smaller than the diameter of the first pipeline.

[0014] In an optional embodiment of the present invention, the flow channel includes a gas phase flow channel and a liquid phase flow channel, one end of the liquid phase branch is connected to the first pipeline, and the other end is connected to the liquid phase flow channel;

[0015] One end of the gas phase branch is connected to the first pipeline, and the other end is connected to the gas phase flow channel.

[0016] In an optional embodiment of the present invention, the flow channel only includes a liquid phase flow channel, one end of the liquid phase branch is connected to the first pipeline, and the other end is connected to the liquid phase flow channel;

[0017] One end of the gas phase branch is connected to the first pipeline, and the other end is connected to the second pipeline.

[0018] In an optional embodiment of the present invention, the static rotating element includes a central axis and guide vanes arranged around the central axis, and the guide vanes are spiral-shaped.

[0019] In an optional embodiment of the present invention, one end of the central axis close to the gas phase conduit is tapered.

[0020] In an optional embodiment of the present invention, the gas-phase conduit is disposed in the first pipeline and the gas-phase branch, and a diameter of the gas-phase conduit is smaller than a diameter of the first pipeline and the gas-phase branch.

[0021] In an optional embodiment of the present invention, one end of the gas phase conduit close to the static swirling element has a taper.

[0022] In an optional embodiment of the present invention, a static de-rotation blade is further provided between the gas phase conduit and the first pipeline, and the direction of the static de-rotation blade is opposite to the direction of the guide blade.

[0023] In an optional embodiment of the present invention, a blocking piece is further provided between the gas phase conduit and the gas phase branch, and the blocking piece isolates the gas phase branch from the space below it.

[0024] In an optional embodiment of the present invention, the joint and the cold plate body are integral or split structures.

[0025] The technical effect of the present invention is that a static swirling element is arranged in the joint to realize two-phase separation of the gas-liquid mixed refrigerant entering the joint, the gas phase can be discharged through the pipelines inside the joint, and the liquid phase can be introduced into the flow channel circulation in the flow channel plate for heat exchange, thereby effectively improving the cooling efficiency; the gas phase duct and the sealing plate are used to effectively prevent the gas phase and the liquid phase from mixing, thereby improving the separation effect; at the same time, static de-rotation blades are used to make the flow of the fluid more stable, and the gas phase and the liquid phase are stably discharged, and the separation is more efficient; the overall structure of the joint is compact, the fluid guidance is strong, and the separation efficiency is high, and the application range is wide, which effectively solves the problems of increased energy consumption caused by the circulation of the gas-liquid mixed refrigerant in the direct cooling plate, large inlet and outlet temperature difference, and easy overheating of the local flow channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0027] Figure 1 An exploded view of the overall structure of a stamped direct cooling plate in one embodiment of the present invention;

[0028] Figure 2 It is a schematic diagram of the overall structure of a stamped direct cooling plate in one embodiment of the present invention;

[0029] Figure 3 It is a schematic diagram of the overall structure of a stamped direct cooling plate in another embodiment of the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the gas phase flow channel and the liquid phase flow channel in one embodiment of the present invention;

[0031] Figure 5 It is a schematic diagram of the overall structure of a harmonica-type direct cooling plate in one embodiment of the present invention;

[0032] Figure 6 It is a schematic diagram of the partial structure of a harmonica-type direct cooling plate in one embodiment of the present invention;

[0033] Figure 7 It is a schematic diagram of the partial structure of a harmonica-type direct cooling plate in another embodiment of the present invention;

[0034] Figure 8 It is a schematic diagram of a partial structure of a joint in one embodiment of the present invention;

[0035] Fig. 9 It is a schematic diagram of a partial structure of a weight-reducing joint in another embodiment of the present invention;

[0036] Fig.10 It is a cross-sectional structural diagram of a joint along the first pipeline direction in one embodiment of the present invention;

[0037] Fig.11 It is a cross-sectional structural diagram of a joint along the second pipeline direction in one embodiment of the present invention.

[0038] Description of labels:

[0039] 100, cold plate body; 200, joint;

[0040] 110, flow channel; 120, flat plate; 130, flow channel plate;

[0041] 111. gas phase flow channel; 112. liquid phase flow channel;

[0042] 210, joint body; 220, static spinning element; 230, gas phase conduit; 240, plugging piece; 250, static de-rotation blade;

[0043] 211, first pipeline; 212, second pipeline; 213, liquid phase branch; 214, gas phase branch;

[0044] 221. Central axis; 222. Guide vane. DETAILED DESCRIPTION

[0045] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0046] It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present invention in a schematic manner, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0047] Refrigerant direct cooling mainly achieves heat transfer and heat dissipation through the phase change of the refrigerant. The process is roughly as follows: the compressor compresses the refrigerant gas into a high-temperature and high-pressure gas. After entering the front condenser, the refrigerant gas is condensed into a high-temperature and high-pressure liquid; the high-temperature and high-pressure liquid expands through the expansion valve and becomes a low-temperature and low-pressure two-phase flow (gas-liquid mixed state) and enters the evaporator. The evaporator can be the cockpit or the direct cooling plate in the battery pack; the refrigerant in the evaporator absorbs heat and evaporates continuously, and finally completely turns into gas and returns to the compressor through the expansion valve to complete a whole cycle. The direct cooling system has gradually become the main development trend of the battery thermal management system because it eliminates the intermediate heat exchange process of the liquid, reduces thermal resistance, and has excellent heat transfer performance and compact system structure. However, in the direct cooling system, what enters the cold plate is a gas-liquid two-phase flow (gas-liquid mixed state), and in fact, only the process of liquid phase conversion to gas phase in the cold plate can achieve the purpose of heat exchange. The gas phase can basically not play a role in heat exchange in the cold plate, but will occupy the volume flow entering the cold plate, which will cause problems such as increased energy consumption, large inlet and outlet temperature difference, and easy overheating of local flow channels.

[0048] See also Figures 1 to 11 The present invention proposes a direct cooling plate, including a cold plate body 100 and a joint 200, wherein a flow channel 110 is formed in the cold plate body 100, and the refrigerant circulates in the flow channel 110 to achieve energy exchange. The cold plate body 100 is in direct contact with the cooled object, such as a battery cell, and the heat of the refrigerant in the cold plate body 100 is directly transferred to the battery cell to achieve cooling or heating of the battery cell; the joint 200 is provided with a gas-liquid separation structure and corresponding pipelines, which can separate the gas-liquid mixed refrigerant entering the joint 200 and respectively lead out through the pipelines, and the liquid phase is led out to the flow channel 110 of the cold plate 100 for circulation, and heat is exchanged with the battery cell. After the circulation, it flows out through the joint 200 and enters the back-end loop for circulation. The gas-liquid mixed refrigerant is separated in the joint 200 to avoid the influence of the gas phase on the heat exchange process, effectively improve the energy conversion efficiency of the cold plate, and improve the safety of the system.

[0049] See also Figures 1 to 7 In an optional embodiment of the present invention, the cold plate body includes, for example, a flat plate 120 and a flow channel plate 130. The flat plate 120 and the flow channel plate 130 can be welded as one piece to form a closed space. The flow channel 110 is formed between the flat plate 120 and the flow channel plate 130. The flat plate 120 is in direct contact with the object to be cooled, such as a battery cell, and can transfer the heat of the refrigerant in the flow channel plate 130 to the battery cell to achieve cooling of the battery cell. Alternatively, when heating is required, the flat plate 120 transfers the heat from the external heat source to the battery cell to achieve heating. In other embodiments, the cold plate body 100 can also be a harmonica-type direct cold plate or other structure.

[0050] See also Figure 3 to Figure 4In an optional embodiment of the present invention, a flow channel 110 is provided in the flow channel plate 130. The flow channel 110 may include, for example, a gas phase flow channel 111 and a liquid phase flow channel 112. The gas-liquid mixed refrigerant entering the joint 200 is separated into a gas phase and a liquid phase through the joint 200, and then enters the gas phase flow channel 111 and the liquid phase flow channel 112 in the flow channel plate 130 respectively. The gas phase circulates through the gas phase flow channel 111 to leave the flow channel plate 130 and flows out of the joint 200 to enter the next cycle; the liquid phase in the liquid phase flow channel 112 circulates in the flow channel plate 130 and exchanges heat with the cooled object such as the battery cell through the flat plate 120. The layout of the flow channel 110 enables the liquid phase to be evenly distributed on the entire direct cooling plate, ensuring uniform cooling or heating of various parts of the battery cell, etc., avoiding the situation where the local temperature is too high or too low, and improving the temperature uniformity. The liquid phase circulates in the flow channel 110 and exchanges heat before flowing out of the joint 200 to enter the next cycle. In other embodiments, the gas phase flow channel 111 may not be provided in the flow channel plate 130 , and the separated gas phase does not enter the flow channel plate 130 , but directly flows out from the joint 200 to enter the next cycle.

[0051] See also Figure 3 to Figure 4 In an optional embodiment of the present invention, the gas phase flow channel 111 is arranged at the outermost edge of the flow channel plate 130. The gas phase flow channel 111 can be, for example, curved, straight or have other specific shapes to guide the gas phase to reach the outlet smoothly, while avoiding remixing with the liquid phase or unnecessary turbulence. The separated gas phase flows along the designed gas phase flow channel 111 at the outermost edge of the cold plate, and enters the next cycle after leaving the flow channel plate 130 and the joint 200. It can be understood that since the gas phase does not participate in energy conversion, it is not necessary to consider factors such as flow rate, flow velocity, and properties when designing the gas phase flow channel 111. Its main purpose is to guide the gas phase to leave and avoid mixing with the liquid phase or turbulence.

[0052] See also Figure 3 to Figure 4 It should be noted that after the liquid enters the flow channel plate 130, it flows in the liquid flow channel 112 and realizes heat exchange through energy conversion. The design of the liquid flow channel 112 must ensure that the liquid flows along a predetermined route to facilitate the collection, discharge or further treatment of the liquid. The flow channel plate 130 can be, for example, a single-layer structure. The liquid flow channel 112 is designed according to factors such as the flow rate, flow velocity, and properties of the liquid to ensure that the liquid can flow stably and smoothly to avoid blockage or accumulation of liquid in the flow channel 110; or the flow channel plate 130 can also be a multi-layer structure, and the liquid can be guided through different levels of liquid flow channels 112 to achieve more precise liquid control and processing.

[0053] See also Figures 1 to 11In an optional embodiment of the present invention, the joint 200 includes a joint body 210, a first pipeline 211, a second pipeline 212, a static swirl element 220 and a gas phase conduit 230. The joint body 210 is provided with a joint inlet and a joint outlet for realizing the introduction and export of refrigerant; the first pipeline 211 and the second pipeline 212 are formed in the joint body 210, one end of the first pipeline 211 is connected to the joint inlet, and the other end is formed with a liquid phase branch 213 and a gas phase branch 214, one end of the second pipeline 212 is connected to the joint outlet, and the other end is connected to the flow channel 110 to connect the joint inlet and the joint outlet, and the various pipelines inside the joint body 210 are connected to the flow channel 110 in the flow channel plate 130, and the liquid phase is introduced into the flow channel plate 130 for circulation to realize heat exchange, and the gas phase is exported through the gas phase branch 214 at the same time, which will not affect The static swirling element 220 is arranged at one end of the first pipeline 211 close to the joint inlet, and is used to separate the gas-liquid mixed refrigerant entering the first pipeline 211 so as to introduce the liquid phase into the flow channel plate 130 for circulation; the gas phase conduit 230 is arranged at one end of the first pipeline 211 away from the static swirling element 220. The gas phase conduit 230 is a hollow pipeline, which is used to guide the separated gas phase along a certain path to the gas phase branch 214. Its diameter is smaller than the diameter of the first pipeline 211 to ensure the smooth flow of the liquid phase on the inner wall of the pipeline. The gas phase conduit 230 can effectively separate the gas phase and the liquid phase and prevent them from mixing again.

[0054] See also Figures 1 to 11 In an optional embodiment of the present invention, the flow channel 110 includes a gas phase flow channel 111 and a liquid phase flow channel 112, one end of the liquid phase branch 213 is connected to the first pipeline 211, and the other end is connected to the liquid phase flow channel 112; one end of the gas phase branch 214 is connected to the first pipeline 211, and the other end is connected to the gas phase flow channel 111. The gas-liquid mixed refrigerant enters the first channel from the joint inlet, and is separated into gas phase and liquid phase after passing through the static rotating element 220. The liquid phase enters the liquid phase flow channel 112 in the flow channel plate 130 through the liquid phase branch 213, and circulates in the liquid phase flow channel 112 to achieve heat exchange. The outlet of the liquid phase flow channel 112 is connected to the second pipeline 212. After the liquid phase circulation is completed, it enters the second pipeline 212 and leaves from the joint outlet; the gas phase enters the gas phase flow channel 111 in the flow channel plate 130 through the gas phase branch 214. The outlet of the gas phase flow channel 111 is connected to the second pipeline 212. After leaving the flow channel plate 130, the gas phase enters the second pipeline 212 and leaves from the joint outlet.

[0055] See also Figures 1 to 11In an optional embodiment of the present invention, the first pipeline 211 and the second pipeline 212 can be, for example, arranged in the middle of the joint body 210, and arranged in a direction parallel to the cold plate plane. The rear end of the first pipeline 211 forms a liquid branch 213 and a gas branch 214. The liquid branch 213 can, for example, be arranged along the height direction of the joint 200 and located below the first pipeline 211, and is connected to the inlet of the liquid phase flow channel 112. After the liquid phase is separated, it flows down along the inner wall of the liquid phase branch 213 and enters the liquid phase flow channel 112; the inlet of the gas phase branch 214 is located above the first pipeline 211, and is connected to the inlet of the gas phase flow channel 111 through a curved pipeline structure, so that the gas phase enters the gas phase flow channel 111 along the gas phase branch 214.

[0056] See also Figures 1 to 11 In another optional embodiment of the present invention, the flow channel 110 only includes the liquid phase flow channel 112, one end of the liquid phase branch 213 is connected to the first pipeline 211, and the other end is connected to the liquid phase flow channel 112, one end of the gas phase branch 214 is connected to the first pipeline 211, and the other end is connected to the second pipeline 212, that is, the gas phase flow channel 111 is not provided in the flow channel plate 130, and the gas phase is separated and flows directly from the gas phase branch 214 to the second pipeline 212 and leaves from the joint outlet without entering the cold plate circulation. It can be understood that the inlet of the conventional compressor has a gas-liquid separator, which can allow a certain amount of liquid, and the separated gas phase does not pass through the cold plate circuit, but directly enters the joint outlet on the joint 200, reducing the gas phase channel on the cold plate, reducing the cold plate area, and reducing the manufacturing cost.

[0057] See also Figures 8 to 11In an optional embodiment of the present invention, the static swirling element 220 includes a central axis 221 and guide vanes 222 arranged around the central axis 221. The static swirling element 220 can be assembled in the joint 200 by interference fit, or can be connected to the joint 200 by brazing or other methods. The guide vanes 222 are spiral-shaped and evenly distributed on the central axis 221. After the gas-liquid two-phase flow enters the first pipeline 211 from the joint inlet, the guide vanes 222 deflect the flow direction of the fluid, thereby generating centrifugal force. Under the action of the centrifugal force, the liquid phase with a higher density in the gas-liquid mixture will migrate to the inner wall of the separator to form a liquid layer, while the gas phase with a lower density will migrate to the center of the separator to form a gas core, so that the gas-liquid two-phase can be initially separated; the end of the central axis 221 close to the gas phase conduit 230 is tapered, so that the separated gas phase can be concentrated in the center of the pipeline to prevent the air flow from dispersing. The separated liquid phase flows to the liquid phase channel 112 in the channel plate 130 through the liquid phase branch 213 to participate in the heat cycle. After the cycle is completed, it leaves the joint outlet through the second pipeline 212, and the gas phase enters the gas phase channel 111 and the second pipeline 212 through the gas phase branch 214, or directly enters the second pipeline 212 through the gas phase branch 214 and leaves the joint outlet. The stable and regular rotating flow generated by the static swirling element 220 makes the gas-liquid separation process more efficient and thorough. The static swirling element 220 does not require additional energy supply and can form a swirl at a lower inlet pressure. At the same time, the energy loss in the swirl formation process is relatively small, which helps to improve the separation efficiency and performance of the entire system. It should be noted that the static swirling element 220 adopts a tubular swirl gas-liquid separation structure to achieve gas-liquid separation. In other embodiments, the gas-liquid separation mechanism can also be a traditional single-inlet swirl separator or a volute-type multi-channel swirl separator, as well as other separator structures with gas-liquid separation functions.

[0058] See also Figures 8 to 11In an optional embodiment of the present invention, the gas phase conduit 230 can be, for example, a curved hollow pipeline for guiding the direction of the gas flow. The gas phase conduit 230, with its specific shape, provides a clear flow channel for the gas phase separated from the front end. The gas phase conduit 230 can be, for example, arranged in the first pipeline 211 and the gas phase branch 214, and its diameter is smaller than the diameter of the first pipeline 211 and the gas phase branch 214. For example, the diameter of the gas phase conduit 230 can be smaller than the diameter of the inner hole of the pipeline by 2-5 mm, so that the separated liquid phase can flow on the inner wall of the pipeline outside the gas phase conduit 230, and the gas phase enters the gas phase conduit 230 and is guided to the gas phase branch 214, i.e., the outflow pipeline of the gas phase. In the process of gas-liquid separation, the structure of the gas phase conduit 230 can also play a certain blocking role, reducing the possibility of liquid droplets being carried out by the gas phase. The shape and size of the gas phase conduit 230 can be used to achieve a better separation between the gas phase and the liquid phase during the outflow process, reduce the amount of liquid droplets entrained, and improve the separation effect. In other embodiments, the gas phase outflow pipeline may have various designs, and the corresponding gas phase conduit 230 structure may also have various changes.

[0059] See also Figures 8 to 11 In an optional embodiment of the present invention, the end of the gas phase conduit 230 close to the static swirling element 220 has a taper, and the taper can be, for example, 10-30°, and its end is opposite to the taper at the end of the static swirling element 220, which can guide the gas phase to flow out of the device smoothly, avoid air flow turbulence, and ensure the orderliness of the gas phase flow; the special structure of the gas phase conduit 230 enables a certain pressure gradient to be maintained during the gas phase outflow process, promotes the continuous discharge of the gas phase, and prevents air flow instability or backflow caused by pressure fluctuations, thereby maintaining the relative stability of the gas phase pressure inside the device; at the same time, the smooth inner wall and gradually changing shape of the gas phase conduit 230 can reduce the friction resistance between the airflow and the tube wall, so that the gas phase can flow and discharge the equipment more smoothly, thereby improving the operating efficiency of the entire system.

[0060] See also Figures 8 to 11In an optional embodiment of the present invention, a plugging piece 240 is further provided between the gas phase conduit 230 and the gas phase branch 214. The plugging piece 240 isolates the gas phase branch 214 from the space below it. For example, the plugging piece 240 can be provided at the end of the gas phase conduit 230, thereby isolating the liquid phase channel and the gas phase channel, preventing the gas phase from being remixed with the liquid droplets on the inner wall of the pipeline after being discharged from the gas phase conduit 230. The separated gas phase enters the gas phase branch 214 along a certain direction under the guidance of the gas phase conduit 230 and then flows into the gas phase flow channel 111 or the second pipeline 212, while the liquid phase is thrown onto the inner wall of the pipeline. There may be some liquid droplets on the inner wall of the upper pipeline. At the same time, the gas phase flows out from the end of the gas phase conduit 230 and disperses in the pipeline, and may also mix with the liquid droplets below. Therefore, a blocking piece 240 is added to the front end of the outlet of the gas phase conduit 230 to isolate the liquid phase channel below from the gas phase channel above, so as to ensure that the separated gas phase and liquid phase will not mix again.

[0061] See also Figures 8 to 10 In an optional embodiment of the present invention, a static de-rotation blade 250 is further arranged between the gas phase conduit 230 and the first pipeline 211, and the direction of the static de-rotation blade 250 is opposite to the direction of the guide blade 222. When the gas-liquid mixture passes through the static vortex element 220 to generate a rotating flow, the fluid has a high rotational kinetic energy, and a strong turbulence will be generated during the flow process, increasing the flow resistance and reducing the separation efficiency. The static de-rotation blade 250 can be used to convert the rotational kinetic energy into other forms of energy, effectively reducing the rotational kinetic energy of the fluid, avoiding excessive rotation speed, making the flow of the fluid more stable, and the separation efficiency higher. The separated liquid phase flows near the wall surface, and excessive rotational kinetic energy may cause the liquid phase to flow unstably, and even cause splashing or secondary atomization. The static de-rotation blade 250 is arranged between the gas phase conduit 230 and the first pipeline 211, which can reduce the rotation speed of the liquid phase, make the liquid phase flow more smoothly along the wall surface, promote the aggregation and discharge of the liquid phase, and improve the efficiency and purity of liquid phase separation. In other embodiments, a de-rotation blade may also be provided in the gas phase conduit 230 to reduce the rotation intensity of the gas phase, maintain the stability of the gas phase flow, avoid fluctuations or backflow of the gas phase due to unstable rotation, ensure the stability of the pressure and flow at the gas phase outlet, and allow the gas phase to be discharged from the gas phase conduit 230 more purely.

[0062] See also Figures 8 to 11In an optional embodiment of the present invention, the static swirling element 220, the gas phase conduit 230 and the blocking piece 240 can be locked on the joint body 210, or the static swirling element 220 and the gas phase conduit 230 can be assembled and then brazed on the joint body 210. The joint body 210 can be, for example, an integral square structure, and each pipeline and element is arranged inside the joint body 210, or the joint body 210 can also be optimized according to the pipeline structure to reduce weight, which is more conducive to the brazing pass rate.

[0063] See also Figures 1 to 7 In an optional embodiment of the present invention, the joint 200 and the cold plate body 100 can be an integral or split structure. For example, the joint 200 can be directly welded to the cold plate body 100, and the positions of each pipeline and the flow channel 110 correspond to each other; or the joint 200 can also be connected to the cold plate body 100 by bolts or other structures. Specifically, for example, the connecting pipeline on the cold plate body 100 is plugged into the pipeline port corresponding to the joint 200, and a sealing ring is added in the middle for sealing, and then locked and fixed by bolts.

[0064] See also Figures 1 to 7 In an optional embodiment of the present invention, the cold plate body 100 may be a stamped direct cold plate, or a harmonica tube type cold plate, etc., and the structure and connection method of the joint 200 may also be changed accordingly. For example, the joint 200 may include a first joint and a second joint, the first joint is connected to the inlet end of the flow channel 110, and has a first pipeline 211, a liquid phase branch 213, and a gas phase branch 214 inside, and is provided with a gas-liquid separation device for separating the gas-liquid mixed refrigerant and introducing the gas phase and the liquid phase into the corresponding flow channels 110 respectively, and its specific structure is as described in the above embodiment, the second joint is connected to the outlet end of the flow channel 110, and has a second pipeline 212 inside, which is used to guide the refrigerant after the heat cycle is completed to the back-end circuit; or the branch where the gas phase is located in the first joint is directly connected to the second pipeline 212 in the second joint, that is, the gas phase does not pass through the cold plate circulation, and is directly guided out of the joint 200.

[0065] See also Figures 1 to 11In an optional embodiment of the present invention, after the gas-liquid mixed cooling medium enters the first pipeline 211 from the joint inlet, under the action of the static swirling element 220, the gas-liquid mixed cooling medium is deflected and generates centrifugal force. Under the action of centrifugal force, because the gas density is small, the centrifugal force it receives is small, and it will gather toward the center. The liquid density is large, and the centrifugal force it receives is large, and it will be thrown toward the inner wall of the inlet channel, so that the lighter gas phase migrates toward the center of the static swirling element 220 to form a gas core, and the heavier liquid phase migrates toward the inner wall of the inlet channel to form a liquid layer; the liquid layer at the wall passes through the outer wall of the gas phase conduit 230, enters the liquid phase flow channel 112 through the liquid phase branch 213 to circulate to achieve heat exchange, and the gas core at the center is guided into the gas phase branch 214 through the central channel of the gas phase conduit 230, and then leaves through the dedicated gas phase channel and the second pipeline 212, or directly leaves from the second pipeline 212 in the joint body 210; the gas phase and the liquid phase enter the cold plate circulation through different channels, thereby achieving the purpose of gas-liquid separation.

[0066] To sum up, in the direct cooling plate of the present invention, a static rotating element 220 is arranged inside the joint 200 to realize gas-liquid separation of the mixed refrigerant entering the joint 200, and the gas phase and the liquid phase are respectively discharged to different channels through the gas phase duct 230 and the branch pipeline to avoid re-mixing. The fluid has strong guidance, good separation effect and high separation efficiency. The liquid phase circulates in the flow channel 110 to realize heat exchange, and the gas phase is discharged and does not participate in energy exchange, which effectively reduces energy consumption and improves cooling efficiency and system safety. The overall structure of the joint 200 is compact and can be applied to a variety of cold plate structures, with a wide range of applications and strong practicality.

[0067] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

[0068] In the description herein, many specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of the specific details or with other devices, systems, components, methods, components, materials, parts, etc. In other cases, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0069] References throughout this specification to "one embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention, and not necessarily in all embodiments. Thus, various appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout this specification do not necessarily refer to the same embodiment. In addition, the particular features, structures, or characteristics of any specific embodiment of the invention may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the invention described and illustrated herein may be possible in light of the teachings herein and are to be considered part of the spirit and scope of the invention.

[0070] It should also be understood that one or more of the elements shown in the figures may also be implemented in a more separate or more integrated manner, or even removed because they are inoperable in certain circumstances or provided because they may be useful depending on the application.

[0071] In addition, unless otherwise explicitly indicated, any marking arrows in the drawings should be regarded as exemplary only and not limiting. In addition, unless otherwise indicated, the term "or" used herein is generally intended to mean "and / or". In the case where the term is not clear because it is anticipated that the ability to separate or combine is provided, the combination of components or steps will also be regarded as indicated.

[0072] As used in the description herein and throughout the claims that follow, "a", "an", and "the" include plural references unless otherwise indicated. Likewise, as used in the description herein and throughout the claims that follow, the meaning of "in" includes "in" and "on" unless otherwise indicated.

[0073] The above description of the illustrated embodiments of the present invention (including the contents described in the Abstract) is not intended to be an exhaustive list or to limit the present invention to the precise form disclosed herein. Although specific embodiments of the present invention and examples of the present invention are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present invention as will be recognized and appreciated by those skilled in the art. As noted, these modifications may be made to the present invention in accordance with the above description of the embodiments described in the present invention, and these modifications will be within the spirit and scope of the present invention.

[0074] Systems and methods have been generally described herein as details that aid in understanding the present invention. In addition, various specific details have been given to provide an overall understanding of embodiments of the present invention. However, those skilled in the relevant art will recognize that embodiments of the present invention may be practiced without one or more of the specific details, or may be practiced using other devices, systems, accessories, methods, components, materials, parts, etc. In other cases, well-known structures, materials, and / or operations are not specifically shown or described in detail to avoid confusion with various aspects of embodiments of the present invention.

[0075] Thus, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the foregoing disclosure, and it should be understood that in some cases, some features of the invention will be employed without the corresponding use of other features without departing from the scope and spirit of the proposed invention. Thus, many modifications may be made to adapt a particular environment or material to the essential scope and spirit of the invention. The invention is not intended to be limited to the specific terms used in the claims below and / or the specific embodiments disclosed as the best mode contemplated for carrying out the invention, but the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Thus, the scope of the invention will be determined solely by the appended claims.

Claims

1. A direct cooling plate, characterized in that: include: A cold plate body, wherein a flow channel is formed in the cold plate body; A connector is connected to the flow channel, and the connector includes: A joint body, wherein the joint body is provided with a joint inlet and a joint outlet; A first pipeline, one end of which is connected to the joint inlet, and the other end of which is formed with a liquid phase branch and a gas phase branch; a second pipeline, one end of which is connected to the joint outlet, and the other end of which is connected to the flow channel; A static spinning element is arranged at one end of the first pipeline close to the joint inlet; The gas phase conduit is arranged at one end of the first pipeline away from the static swirling element, and has a diameter smaller than the diameter of the first pipeline.

2. The direct cooling plate according to claim 1, characterized in that: The flow channel includes a gas phase flow channel and a liquid phase flow channel, one end of the liquid phase branch is connected to the first pipeline, and the other end is connected to the liquid phase flow channel; One end of the gas phase branch is connected to the first pipeline, and the other end is connected to the gas phase flow channel.

3. The direct cooling plate according to claim 1, characterized in that: The flow channel only includes a liquid phase flow channel, one end of the liquid phase branch is connected to the first pipeline, and the other end is connected to the liquid phase flow channel; One end of the gas phase branch is connected to the first pipeline, and the other end is connected to the second pipeline.

4. The direct cooling plate according to claim 1, characterized in that: The static rotating element comprises a central axis and guide vanes arranged around the central axis, and the guide vanes are spiral-shaped.

5. The direct cooling plate according to claim 4, characterized in that: One end of the central axis close to the gas phase conduit is tapered.

6. The direct cooling plate according to claim 1, characterized in that: The gas phase conduit is arranged in the first pipeline and the gas phase branch, and the diameter of the gas phase conduit is smaller than the diameter of the first pipeline and the gas phase branch.

7. The direct cooling plate according to claim 1, characterized in that: One end of the gas phase conduit close to the static swirling element has a taper.

8. The direct cooling plate according to claim 4, characterized in that: A static de-rotation blade is further arranged between the gas phase conduit and the first pipeline, and the direction of the static de-rotation blade is opposite to the direction of the guide blade.

9. The direct cooling plate according to claim 6, characterized in that: A blocking piece is also provided between the gas phase conduit and the gas phase branch, and the blocking piece isolates the gas phase branch from the space below it.

10. The direct cooling plate according to claim 1, characterized in that: The joint and the cold plate body are integral or split structures.

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