Cold plate assembly

Abstract

The invention provides a cold plate assembly which comprises a bottom plate and a cover plate which are stacked, a middle cooling groove and a plurality of first cooling flow channels are formed in the bottom plate, the first cooling flow channels are distributed in the circumferential direction of the middle cooling groove at intervals, and the first cooling flow channels extend from the middle cooling groove to the outer side of the bottom plate in a radiation mode. An inlet and an outlet are formed in the cover plate, the inlet is communicated with the middle cooling groove, one end of each first cooling flow channel is communicated with the middle cooling groove, and the other end of each first cooling flow channel is communicated with the outlet. According to the cooling plate, due to the fact that the first cooling flow channels formed in the bottom plate extend outwards in the circumferential direction of the middle cooling groove in the radiating mode, cooling liquid entering the middle cooling groove from the inlet of the cover plate can be evenly distributed into the first cooling flow channels, and therefore the problem that flow distribution is not uniform in the flow distribution process of the cooling plate is solved; therefore, the cold plate assembly can uniformly cool the electronic components.

Description

Technical Field

[0001] The invention belongs to the technical field of liquid cooling, and in particular relates to a cold plate assembly. Background Art

[0002] In recent years, the accelerating development of high-throughput computing industries such as AI, cloud computing, and big data, coupled with the proposal and implementation of national visionary goals and policies such as "New Infrastructure," "East-West Computing," and "Digital China," has created a huge demand for data center computing power. This has led to a continuous trend toward higher power and higher density in server cabinets, resulting in a continuous increase in the heat flux density of internal electronic components (such as high-performance chips). Data shows that approximately 55% of electronic component failures are caused by excessively high and uneven temperatures. Therefore, adding additional cooling systems to meet data center heat dissipation requirements is essential.

[0003] Compared to traditional air cooling, cold plate liquid cooling technology offers numerous advantages, including high heat dissipation efficiency, energy conservation, compact structure, system stability, and low noise. It can meet the development requirements of high-heat flux, high-power, and highly compact data centers, and is currently a hot research topic in data center cooling technology. However, cold plate liquid cooling technology has the following problems during use: Due to the different placement of the cold plate inlet and outlet and the influence of the internal structure, the flow distribution within the cold plate can be uneven, resulting in uneven temperature distribution within the microchannels. Summary of the Invention

[0004] Therefore, the present invention provides a cold plate assembly that can solve the technical problem that the existing cold plate assembly, due to the different settings of the cold plate inlet and outlet and the influence of the internal structure, will lead to uneven flow distribution in the flow channels of the cold plate and uneven temperature distribution in the microchannel.

[0005] In order to solve the above problems, the present invention provides a cold plate assembly, including a stacked base plate and a cover plate, a central cooling groove and a plurality of first cooling channels are formed on the base plate, each of the first cooling channels is distributed at intervals along the circumference of the central cooling groove, and each of the first cooling channels extends radially from the central cooling groove toward the outer side of the base plate, an inlet and an outlet are constructed on the cover plate, the inlet is connected to the central cooling groove, one end of each of the first cooling channels is connected to the central cooling groove, and the other end of each of the first cooling channels is connected to the outlet.

[0006] In some embodiments, a plurality of second cooling channels are further formed on the base plate, each of the second cooling channels extending radially from the center of the base plate to the outside of the base plate, and each of the second cooling channels and each of the first cooling channels are alternately distributed along the circumference of the central cooling groove, and one end of each of the second cooling channels facing the central cooling groove is located radially outward of one end of each of the first cooling channels facing the central cooling groove; the coolant entering from the inlet can be diverted into the central cooling groove and each of the second cooling channels, and the coolant entering the central cooling groove is diverted into each of the first cooling channels and then flows out from the outlet, and the coolant entering each of the second cooling channels also flows out from the outlet.

[0007] In some embodiments, a first diverter plate is further assembled between the base plate and the cover plate, and a first central flow hole and multiple first flow channels are formed on the first diverter plate, the first central flow hole and each first flow channel both pass through the first diverter plate, and each first flow channel surrounds the periphery of the first central flow hole; the inlet is connected to the central cooling groove through the first central flow hole, one end of each first flow channel is connected to the first central flow hole, and the other end of each first flow channel is respectively connected to each second cooling channel, and the end of each second cooling channel away from each first flow channel is connected to the outlet.

[0008] In some embodiments, a first circumferential guide groove is further formed on the first diversion plate, and the first circumferential guide groove surrounds the periphery of the first central flow hole. Each of the first flow channels surrounds the periphery of the first circumferential guide groove, and each of the first flow channels is connected to the first central flow hole through the first circumferential guide groove.

[0009] In some embodiments, a first collecting channel is further formed on the first diverter plate, the first collecting channel passes through the first diverter plate, and the first collecting channel is located at the periphery of each first flow channel and close to the edge of the first diverter plate, and each first cooling channel and each second cooling channel are connected to the outlet through the first collecting channel.

[0010] In some embodiments, a plurality of third cooling channels are further formed on the base plate, each of the third cooling channels radially extending from the center of the base plate to the outside of the base plate, and each of the first cooling channels, each of the second cooling channels and each of the third cooling channels are alternately distributed along the circumference of the central cooling groove, and one end of each of the third cooling channels facing the central cooling groove is located radially outward of one end of each of the second cooling channels facing the central cooling groove, and the coolant entering from the inlet can also be diverted into each of the third cooling channels, and the coolant entering each of the third cooling channels also flows out from the outlet.

[0011] In some embodiments, a plurality of second flow channels are further formed on the first diverter plate, each of the second flow channels passes through the first diverter plate, and each of the second flow channels surrounds the periphery of each first flow channel; a second diverter plate is further assembled between the first diverter plate and the cover plate, a second central flow hole and a plurality of third flow channels are formed on the second diverter plate, the second central flow hole and each of the third flow channels pass through the second diverter plate, and each of the third flow channels surrounds the periphery of the second central flow hole; the inlet, the second central flow hole, the first central flow hole, and the central cooling groove are connected in sequence, one end of each of the third flow channels is connected to the second central flow hole, the other end of each of the third flow channels is respectively connected to each of the second flow channels, the end of each of the second flow channels away from each of the third flow channels is respectively connected to each of the third cooling channels, and the end of each of the third cooling channels away from each of the second flow channels is connected to the outlet.

[0012] In some embodiments, a second circumferential guide groove is further formed on the second diversion plate, and the second circumferential guide groove surrounds the periphery of the second central flow hole. Each of the third flow channels surrounds the periphery of the second circumferential guide groove, and each of the third flow channels is connected to the second central flow hole through the second circumferential guide groove.

[0013] In some embodiments, a second collecting channel is further formed on the second diverter plate, the second collecting channel passes through the second diverter plate, and the second collecting channel is located outside each of the third flow channels and close to the edge of the second diverter plate, and each of the first cooling channels, each of the second cooling channels and each of the third cooling channels is connected to the outlet through the first collecting channel and the second collecting channel in sequence.

[0014] In some embodiments, a plurality of fourth cooling channels are further constructed on the base plate, each of the fourth cooling channels radially extending from the center of the base plate to the outside of the base plate, and each of the first cooling channels, each of the second cooling channels, each of the third cooling channels and each of the fourth cooling channels are alternately distributed along the circumference of the central cooling groove, and one end of each of the fourth cooling channels facing the central cooling groove is located radially outward of one end of each of the third cooling channels facing the central cooling groove, and the coolant entering from the inlet can also be diverted into each of the fourth cooling channels, and the coolant entering each of the fourth cooling channels also flows out from the outlet.

[0015] In some embodiments, a plurality of fourth flow channels are further formed on the first diverter plate, each of the fourth flow channels passes through the first diverter plate, and each of the fourth flow channels surrounds the periphery of each of the second flow channels, and a plurality of fifth flow channels are further formed on the second diverter plate, each of the fifth flow channels passes through the second diverter plate, and each of the fifth flow channels surrounds the periphery of each of the third flow channels; a third diverter plate is further assembled between the second diverter plate and the cover plate, and a third central flow hole and a plurality of sixth flow channels are formed on the third diverter plate, the third central flow hole and each of the sixth flow channels pass through the third diverter plate, and each of the sixth flow channels passes through the third diverter plate, and The flow channel surrounds the periphery of the third central flow hole; the inlet, the third central flow hole, the second central flow hole, the first central flow hole, and the central cooling groove are connected in sequence, one end of each of the sixth flow channels is connected to the third central flow hole, the other end of each of the sixth flow channels is connected to each of the fifth flow channels respectively, one end of each of the fifth flow channels away from each of the sixth flow channels is connected to each of the fourth flow channels respectively, one end of each of the fourth flow channels away from each of the fifth flow channels is connected to each of the fourth cooling channels respectively, and one end of each of the fourth cooling channels away from each of the fourth flow channels is connected to the outlet.

[0016] In some embodiments, a third circumferential guide groove is further formed on the third diversion plate, and the third circumferential guide groove surrounds the periphery of the third central flow hole. Each of the sixth flow channels surrounds the periphery of the third circumferential guide groove, and each of the sixth flow channels is connected to the third central flow hole through the third circumferential guide groove.

[0017] In some embodiments, a third collecting channel is also formed on the third diverter plate, and the third collecting channel runs through the third diverter plate, and the third collecting channel is located at the periphery of each of the sixth flow channels and close to the edge of the third diverter plate, and each of the first cooling channels, each of the second cooling channels, each of the third cooling channels and each of the fourth cooling channels are connected to the outlet through the first collecting channel, the second collecting channel and the third collecting channel in sequence.

[0018] In some embodiments, a plurality of spoiler columns are formed on the bottom plate and are located in the central cooling groove, and the spoiler columns are spaced apart in the central cooling groove.

[0019] In some embodiments, the inlet is located at the center of the cover plate, and there are multiple outlets, each of which is spaced apart along the circumference of the cover plate, and each of the outlets is close to an edge of the cover plate.

[0020] The cold plate assembly provided by the present invention has the following beneficial effects:

[0021] Since the first cooling channels formed on the base plate extend radially outward along the circumference of the central cooling groove, the coolant entering the central cooling groove from the inlet of the cover plate will be evenly diverted to the first cooling channels, thereby reducing the uneven flow distribution problem caused by the cold plate diversion process, so that the cold plate assembly of the present application can evenly cool the electronic components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0023] Figure 1 An exploded schematic diagram of a cold plate assembly according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic structural diagram of a cold plate assembly according to an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of a bottom plate of a cold plate assembly according to an embodiment of the present invention;

[0026] Figure 4 is a partial schematic diagram of a bottom plate of a cold plate assembly according to an embodiment of the present invention;

[0027] Figure 5A schematic diagram of a first manifold plate of a cold plate assembly according to an embodiment of the present invention;

[0028] Figure 6 Schematic diagram of a second manifold of a cold plate assembly according to an embodiment of the present invention;

[0029] Figure 7 Schematic diagram of a third manifold of a cold plate assembly according to an embodiment of the present invention;

[0030] Figure 8 A top view of a cold plate assembly according to an embodiment of the present invention;

[0031] Figure 9 for Figure 8 A cross-sectional view taken along the AA line of a cold plate assembly according to an embodiment of the present invention;

[0032] Figure 10 for Figure 9 FIG. 1 is an enlarged schematic diagram of point B of the cold plate assembly according to an embodiment of the present invention.

[0033] The reference numerals indicate:

[0034] 1. Base plate; 2. Cover plate; 3. Central cooling groove; 4. First cooling channel; 5. First diverter plate; 6. First central flow hole; 7. First flow channel; 8. Second cooling channel; 9. First circumferential guide groove; 10. First collecting channel; 11. Second flow channel; 12. Second diverter plate; 13. Second central flow hole; 14. Third flow channel; 15. Third cooling channel; 16. Second circumferential guide groove; 17. Second collecting channel; 18. Fourth flow channel; 19. Fifth flow channel; 20. Third diverter plate; 21. Third central flow hole; 22. Sixth flow channel; 23. Fourth cooling channel; 24. Third circumferential guide groove; 25. Third collecting channel; 26. Spoiler column; 27. Liquid inlet pipe; 28. Liquid outlet pipe. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0037] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0038] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0039] See also Figures 1 to 10 As shown, according to an embodiment of the present invention, a cold plate assembly is provided, comprising a stacked base plate 1 and a cover plate 2, a central cooling groove 3 and a plurality of first cooling channels 4 being formed on the base plate 1, the first cooling channels 4 being distributed at intervals along the circumference of the central cooling groove 3, and the first cooling channels 4 extending radially from the central cooling groove 3 toward the outside of the base plate 1, an inlet and an outlet being constructed on the cover plate 2, the inlet being connected to the central cooling groove 3, one end of each first cooling channel 4 being connected to the central cooling groove 3, and the other end of each first cooling channel 4 being connected to the outlet.

[0040] In this technical solution, since the first cooling channels 4 formed on the base plate 1 extend radially outward along the circumference of the central cooling groove 3, the coolant entering the central cooling groove 3 from the inlet of the cover plate 2 will be evenly diverted into the first cooling channels 4, thereby reducing the uneven flow distribution problem caused by the cold plate diversion process, so that the cold plate assembly of the present application can evenly cool the electronic components. The coolant diverted into each first cooling channel 4 flows through each first cooling channel 4 and then flows away from the outlet of the cover plate 2. Among them, the bottom of the base plate 1 of the cold plate assembly is close to the electronic components that need to be cooled, and the coolant takes away the heat generated by the electronic components during the process of flowing through the base plate 1. Preferably, the cross-sectional shape of the central cooling groove 3 is circular or square.

[0041] See also Figure 1 、 Figure 3 and Figure 4 As shown, a plurality of second cooling channels 8 are also formed on the base plate 1, and each second cooling channel 8 extends radially from the center of the base plate 1 to the outside of the base plate 1, and each second cooling channel 8 and each first cooling channel 4 are alternately distributed along the circumference of the central cooling groove 3, and one end of each second cooling channel 8 facing the central cooling groove 3 is located radially outward of one end of each first cooling channel 4 facing the central cooling groove 3; the coolant entering from the inlet can be diverted into the central cooling groove 3 and each second cooling channel 8, the coolant entering the central cooling groove 3 is diverted into each first cooling channel 4 and then flows out from the outlet, and the coolant entering each second cooling channel 8 also flows out from the outlet.

[0042] In this embodiment, the cold plate of the existing cold plate liquid cooling technology usually adopts microchannel flow channels to achieve the purpose of increasing the heat exchange area and structural compactness. However, since the fluid in the microchannel flow channel is greatly affected by the viscosity effect, the pressure drop of the coolant reaching the edge of the cold plate flow channel will be too large, and the coolant also has a low heat exchange efficiency due to the temperature rise during the flow. In this application, by making the end of each second cooling channel 8 facing the middle cooling groove 3 located radially outward of the end of each first cooling channel 4 facing the middle cooling groove 3, the end of each second cooling channel 8 facing the middle cooling groove 3 is closer to the edge of the base plate 1. Therefore, the coolant diverted into each second cooling channel 8 has a shorter path to the edge of the base plate 1 than the coolant diverted from the middle cooling groove 3 into each first cooling channel 4. The shortened path can improve the situation where the coolant reaches the edge of the cold plate flow channel with excessive pressure drop. At the same time, the low-temperature coolant flowing through each second cooling channel 8 has a shorter path, so the cooling liquid reaches the edge of the base plate 1 with less temperature drop, so the edge position of the base plate 1 can also obtain a lower cooling temperature (equivalent to the electronic components that are attached farther away from the center of the base plate 1 can also obtain coolant with a lower temperature), thereby improving the situation where the heat exchange efficiency of the coolant is low due to the temperature rise during the flow. At the same time, the alternating distribution of each second cooling channel 8 and each first cooling channel 4 along the circumference of the central cooling groove 3 makes the cold plate assembly cool the electronic components more evenly. It can be understood that each second cooling channel 8 is not connected to each first cooling channel 4 on the base plate 1, so the coolant flowing through each second cooling channel 8 does not mix with the coolant flowing through each first cooling channel 4, reducing the pressure loss caused by mixing (collision) and high flow rate of the fluid, and does not cause cross-flow and heat cross-flow phenomena.

[0043] See also Figure 1 、 Figures 3 to 5 As shown, a first diverter plate 5 is also assembled between the base plate 1 and the cover plate 2, and a first central flow hole 6 and a plurality of first flow channels 7 are formed on the first diverter plate 5. The first central flow hole 6 and each first flow channel 7 all pass through the first diverter plate 5, and each first flow channel 7 surrounds the periphery of the first central flow hole 6; the inlet is connected to the central cooling groove 3 through the first central flow hole 6, one end of each first flow channel 7 is connected to the first central flow hole 6, and the other end of each first flow channel 7 is connected to each second cooling channel 8 respectively, and the end of each second cooling channel 8 away from each first flow channel 7 is connected to the outlet.

[0044] In this technical solution, after the addition of the first diverter plate 5, the coolant entering from the inlet is split into two parts. One part of the coolant flows through the first central flow hole 6 into the central cooling groove 3, and then flows from the central cooling groove 3 into each first cooling channel 4 before flowing out of the outlet. The other part of the coolant flows through the first central flow hole 6 into each first flow channel 7, and then flows from each first flow channel 7 into each second cooling channel 8 before also flowing out of the outlet. In other words, the addition of the first diverter plate 5 allows the coolant entering from the inlet to be directly diverted into each second cooling channel 8 without undergoing heat exchange.

[0045] See also Figure 1 and Figure 5 As shown, a first circumferential guide groove 9 is also formed on the first diversion plate 5, and the first circumferential guide groove 9 surrounds the periphery of the first central flow hole 6. Each first flow channel 7 surrounds the periphery of the first circumferential guide groove 9, and each first flow channel 7 is connected to the first central flow hole 6 through the first circumferential guide groove 9.

[0046] In this embodiment, the first circumferential guide groove 9 is provided for guiding the flow, which is beneficial for evenly distributing the coolant into each first flow channel 7, and further beneficial for evenly distributing the coolant into each second cooling channel 8.

[0047] See also Figure 1 and Figure 5 As shown, a first collecting channel 10 is also formed on the first diverter plate 5. The first collecting channel 10 runs through the first diverter plate 5, and the first collecting channel 10 is located at the periphery of each first flow channel 7 and close to the edge of the first diverter plate 5. Each first cooling channel 4 and each second cooling channel 8 are connected to the outlet through the first collecting channel 10.

[0048] In this technical solution, the first collecting channel 10 has a collecting function, which can collect the coolant flowing out of each first cooling channel 4 and each second cooling channel 8 and flow it out at the outlet of the cover plate 2. The first collecting channel 10 extends along the circumference of the first diverter plate 5. To prevent the edge and the main body of the first diverter plate 5 from separating, the first collecting channel 10 is separated by a plurality of first connecting ribs.

[0049] See also Figure 1 、 Figure 3 and Figure 4As shown, a plurality of third cooling channels 15 are further formed on the base plate 1, and each third cooling channel 15 extends radially from the center of the base plate 1 to the outside of the base plate 1, and each first cooling channel 4, each second cooling channel 8 and each third cooling channel 15 are alternately distributed along the circumference of the central cooling groove 3, and one end of each third cooling channel 15 facing the central cooling groove 3 is located radially outward of one end of each second cooling channel 8 facing the central cooling groove 3. The coolant entering from the inlet can also be diverted into each third cooling channel 15, and the coolant entering each third cooling channel 15 also flows out from the outlet.

[0050] In this embodiment, by positioning the ends of each third cooling channel 15 facing the central cooling groove 3 radially outward of the ends of each second cooling channel 8 facing the central cooling groove 3, the ends of the third cooling channels 15 facing the central cooling groove 3 are generally closer to the edge of the base plate 1. This results in a shorter path for the coolant flowing into each third cooling channel 15 to reach the edge of the base plate 1 than for the coolant flowing from the first diverter plate 5 into each second cooling channel 8. This further shortened path further mitigates the excessive pressure drop at the edge of the cold plate. Furthermore, the shortened path further reduces the temperature drop of the low-temperature coolant flowing through each third cooling channel 15 upon reaching the edge of the base plate 1, further reducing the cooling temperature at the edge of the base plate 1. This further mitigates the problem of low heat exchange efficiency due to temperature rise during coolant flow. Furthermore, the alternating distribution of the first cooling channels 4, the second cooling channels 8, and the third cooling channels 15 along the circumference of the central cooling groove 3 enables the cold plate assembly to provide more uniform cooling for electronic components. It can be understood that since the third cooling channels 15 are not connected to the first cooling channels 4 and the second cooling channels 8 on the base plate 1, the coolant flowing through the first cooling channels 4, the second cooling channels 8 and the third cooling channels 15 are not mixed, and cross-flow and heat transfer will not occur.

[0051] See also Figure 1 、 Figures 3 to 6As shown, a plurality of second flow channels 11 are further formed on the first diverter plate 5, and each second flow channel 11 passes through the first diverter plate 5, and each second flow channel 11 surrounds the periphery of each first flow channel 7; a second diverter plate 12 is further assembled between the first diverter plate 5 and the cover plate 2, and a second central flow hole 13 and a plurality of third flow channels 14 are formed on the second diverter plate 12, and the second central flow hole 13 and each third flow channel 14 pass through the second diverter plate 12, and each third flow channel 14 surrounds The periphery of the second central flow hole 13; the inlet, the second central flow hole 13, the first central flow hole 6, and the central cooling groove 3 are connected in sequence, one end of each third flow channel 14 is connected to the second central flow hole 13, the other end of each third flow channel 14 is respectively connected to each second flow channel 11, and the end of each second flow channel 11 away from each third flow channel 14 is respectively connected to each third cooling channel 15, and the end of each third cooling channel 15 away from each second flow channel 11 is connected to the outlet.

[0052] In this technical solution, after the second diversion plate 12 is added, the coolant entering from the inlet will be divided into three parts. The first part of the coolant enters the central cooling groove 3 through the second central flow hole 13 and the first central flow hole 6, and then is diverted from the central cooling groove 3 to each first cooling channel 4 before flowing out from the outlet; the second part of the coolant is diverted into each first flow channel 7 through the second central flow hole 13 and the first central flow hole 6, and then flows from each first flow channel 7 into each second cooling channel 8 and also flows out from the outlet; the third part of the coolant is diverted into each third flow channel 14 through the second central flow hole 13, and then the coolant in each third flow channel 14 flows into each second flow channel 11, and finally flows from each second flow channel 11 into the coolant in each third cooling channel 15 and also flows out from the outlet. That is, the addition of the second diverter plate 12 enables the coolant entering from the inlet to be directly diverted into each third cooling channel 15 without undergoing heat exchange.

[0053] See also Figure 1 and Figure 6 As shown, a second circumferential guide groove 16 is also formed on the second diverter plate 12, and the second circumferential guide groove 16 surrounds the periphery of the second central flow hole 13. Each third flow channel 14 surrounds the periphery of the second circumferential guide groove 16, and each third flow channel 14 is connected to the second central flow hole 13 through the second circumferential guide groove 16.

[0054] In this embodiment, the second circumferential guide groove 16 is provided for guiding the coolant, which is beneficial for evenly distributing the coolant into each third flow channel 14 , and further beneficial for evenly distributing the coolant into each third cooling channel 15 .

[0055] See also Figure 1 and Figure 6 As shown, a second collecting channel 17 is also formed on the second diverter plate 12, and the second collecting channel 17 runs through the second diverter plate 12. The second collecting channel 17 is located on the periphery of each third flow channel 14 and close to the edge of the second diverter plate 12. Each first cooling channel 4, each second cooling channel 8 and each third cooling channel 15 is connected to the outlet through the first collecting channel 10 and the second collecting channel 17 in sequence.

[0056] In this technical solution, the coolant flowing out of each first cooling channel 4, each second cooling channel 8, and each third cooling channel 15 is collected by the first collecting channel 10, flows through the second collecting channel 17 to the outlet of the cover plate 2, and then flows out from the outlet of the cover plate 2. The second collecting channel 17 extends along the circumference of the second manifold plate 12. To prevent the edge and the main body of the second manifold plate 12 from separating, the second collecting channel 17 is separated by a plurality of second connecting ribs.

[0057] See also Figure 1 、 Figure 3 and Figure 4 As shown, a plurality of fourth cooling channels 23 are also constructed on the base plate 1, and each fourth cooling channel 23 extends radially from the center of the base plate 1 to the outside of the base plate 1, and each first cooling channel 4, each second cooling channel 8, each third cooling channel 15 and each fourth cooling channel 23 are alternately distributed along the circumference of the central cooling groove 3, and one end of each fourth cooling channel 23 facing the central cooling groove 3 is located radially outward of one end of each third cooling channel 15 facing the central cooling groove 3. The coolant entering from the inlet can also be diverted into each fourth cooling channel 23, and the coolant entering each fourth cooling channel 23 also flows out from the outlet.

[0058] In this embodiment, by positioning the ends of each fourth cooling channel 23 facing the central cooling groove 3 radially outward of the ends of each third cooling channel 15 facing the central cooling groove 3, the ends of the fourth cooling channels 23 facing the central cooling groove 3 are generally closer to the edge of the base plate 1. This results in the coolant flowing into each fourth cooling channel 23 taking a shorter path to the edge of the base plate 1 than the coolant flowing from the second diverter plate 12 into each third cooling channel 15. This third shortening of the path further improves the situation where the coolant reaches the edge of the cold plate channel with excessive pressure drop. Furthermore, due to the third shortening of the path, the low-temperature coolant flowing through each fourth cooling channel 23 experiences a further reduction in temperature drop upon reaching the edge of the base plate 1. This allows the edge of the base plate 1 to achieve a lower cooling temperature, thereby further improving the situation where the coolant has low heat exchange efficiency due to temperature rise during flow. At the same time, the alternating distribution of the first cooling channels 4, the second cooling channels 8, the third cooling channels 15, and the fourth cooling channels 23 along the circumference of the central cooling groove 3 further uniformly cools the electronic components of the cold plate assembly. It is understood that because the fourth cooling channels 23 are not connected to the first cooling channels 4, the second cooling channels 8, and the third cooling channels on the base plate 1, the coolants flowing through the first cooling channels 4, the second cooling channels 8, the third cooling channels 15, and the fourth cooling channels 23 do not mix, and cross-flow and heat transfer will not occur.

[0059] See also Figure 1 、 Figures 3 to 7As shown, a plurality of fourth flow channels 18 are further formed on the first diverter plate 5, and each fourth flow channel 18 passes through the first diverter plate 5, and each fourth flow channel 18 surrounds the periphery of each second flow channel 11, and a plurality of fifth flow channels 19 are further formed on the second diverter plate 12, and each fifth flow channel 19 surrounds the periphery of each third flow channel 14; a third diverter plate 20 is further assembled between the second diverter plate 12 and the cover plate 2, and a third middle flow hole 21 and a plurality of sixth flow channels 22 are formed on the third diverter plate 20, and the third middle flow hole 21 and each sixth flow channel 22 pass through the third diverter plate 20, and each The sixth flow channel 22 surrounds the periphery of the third central flow hole 21; the inlet, the third central flow hole 21, the second central flow hole 13, the first central flow hole 6, and the central cooling groove 3 are connected in sequence, one end of each sixth flow channel 22 is connected with the third central flow hole 21, the other end of each sixth flow channel 22 is connected with each fifth flow channel 19, the end of each fifth flow channel 19 away from each sixth flow channel 22 is connected with each fourth flow channel 18, the end of each fourth flow channel 18 away from each fifth flow channel 19 is connected with each fourth cooling channel 23, and the end of each fourth cooling channel 23 away from each fourth flow channel 18 is connected with the outlet.

[0060] In this technical solution, after the third diverter plate 20 is added, the coolant entering from the inlet will be divided into four parts. The first part of the coolant enters the central cooling groove 3 through the third central flow hole 21, the second central flow hole 13, and the first central flow hole 6, and then flows from the central cooling groove 3 into each first cooling channel 4 and then flows out from the outlet; the second part of the coolant passes through the third central flow hole 21, the second central flow hole 13, and the first central flow hole 6 and flows into each first flow channel 7, and then flows from each first flow channel 7 into each second cooling channel 8 and then flows out from the outlet; the third part of the coolant passes through the third central flow hole 21, The second central flow hole 13 is diverted into each third flow channel 14. Next, the coolant in each third flow channel 14 flows into each second flow channel 11. Finally, the coolant flows from each second flow channel 11 into each third cooling channel 15 and then flows out from the outlet. The fourth portion of the coolant is diverted into each sixth flow channel 22 through the third central flow hole 21. Then, the coolant in each sixth flow channel 22 flows into each fifth flow channel 19. Next, the coolant in each fifth flow channel 19 flows into each fourth flow channel 18. Finally, the coolant flows from each fourth flow channel 18 into each fourth cooling channel 23 and then flows out from the outlet. In other words, the addition of the third diverter plate 20 enables the coolant entering from the inlet to be directly diverted into each fourth cooling channel 23 without undergoing heat exchange.

[0061] See also Figure 1and Figure 7 As shown, a third circumferential guide groove 24 is also formed on the third diverter plate 20, and the third circumferential guide groove 24 surrounds the periphery of the third central flow hole 21. Each sixth flow channel 22 surrounds the periphery of the third circumferential guide groove 24, and each sixth flow channel 22 is connected to the third central flow hole 21 through the third circumferential guide groove 24.

[0062] In this embodiment, the third circumferential guide groove 24 is provided for guiding the coolant, which is beneficial for evenly distributing the coolant into each sixth flow channel 22 , and further beneficial for evenly distributing the coolant into each fourth cooling channel 23 .

[0063] See also Figure 1 and Figure 7 As shown, a third collecting channel 25 is also formed on the third diverter plate 20, and the third collecting channel 25 runs through the third diverter plate 20, and the third collecting channel 25 is located at the periphery of each sixth flow channel 22 and close to the edge of the third diverter plate 20, and each first cooling channel 4, each second cooling channel 8, each third cooling channel 15 and each fourth cooling channel 23 are connected to the outlet through the first collecting channel 10, the second collecting channel 17 and the third collecting channel 25 in sequence.

[0064] In this technical solution, the coolant flowing out of each first cooling channel 4, each second cooling channel 8, each third cooling channel 15, and each fourth cooling channel 23 is collected by the first collecting channel 10, then flows through the second collecting channel 17 and the third collecting channel 25 in sequence to the outlet of the cover plate 2, and then flows out from the outlet of the cover plate 2. The third collecting channel 25 extends along the circumference of the third manifold plate 20. To prevent the edge of the third manifold plate 20 from separating from the main body, the third collecting channel 25 is separated by a plurality of second connecting ribs.

[0065] See also Figure 3 and Figure 4 As shown, a plurality of spoiler columns 26 are formed on the bottom plate and are located in the central cooling groove 3 , and the spoiler columns 26 are distributed at intervals in the central cooling groove 3 .

[0066] In this embodiment, the refrigerant entering the central cooling groove 3 impacts the spoiler column 26 in the form of a jet, which acts as a turbulent flow to enhance heat exchange and effectively reduce the temperature of the hot spot in the central area of the base plate 1. The cross-sectional shape of the spoiler column 26 can be circular, elliptical, square, etc.

[0067] See also Figure 1 and Figure 2 As shown, the inlet is located in the center of the cover plate 2, and there are multiple outlets. The outlets are distributed at intervals along the circumference of the cover plate 2, and each outlet is close to the edge of the cover plate.

[0068] In this technical solution, the inlet is located in the center of the cover plate 2, so that the inlet corresponds to the position of the third central flow hole 21, the second central flow hole 13, the first central flow hole 6, and the central cooling groove 3. The refrigerant entering from the inlet can smoothly pass through the third central flow hole 21, the second central flow hole 13, and the first central flow hole 6 into the central cooling groove 3. The inlet is connected to a liquid inlet pipe 27. Each outlet is close to the edge of the cover plate, so that the position of each outlet corresponds to the position of the first collecting channel 10, the second collecting channel 17, and the third collecting channel 25. This ensures that the coolant flowing from each first cooling channel 4, each second cooling channel 8, each third cooling channel 15, and each fourth cooling channel 23 to the edge of the base plate 1 can be discharged from each outlet in a timely manner. Each outlet is connected to a liquid outlet pipe 28. The base plate 1, first manifold plate 5, second manifold plate 12, third manifold plate 20, and cover plate 2 are all of the same size and shape, and their cross-sections can be square, circular, rectangular, etc. When the cross-section of the cover plate 2 is square or rectangular, the outlets are located at the four corners of the cover plate 2; when the cross-section of the cover plate 2 is circular, the outlets are evenly distributed along the circumference of the cover plate 2.

[0069] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0070] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A cold plate assembly, characterized in that: The invention comprises a stacked base plate (1) and a cover plate (2), wherein a central cooling groove (3) and a plurality of first cooling channels (4) are formed on the base plate (1), wherein the first cooling channels (4) are distributed at intervals along the circumference of the central cooling groove (3), and each first cooling channel (4) extends radially from the central cooling groove (3) toward the outer side of the base plate (1), and an inlet and an outlet are constructed on the cover plate (2), wherein the inlet is connected to the central cooling groove (3), one end of each first cooling channel (4) is connected to the central cooling groove (3), and the other end of each first cooling channel (4) is connected to the outlet.

2. The cold plate assembly according to claim 1, wherein: A plurality of second cooling channels (8) are also formed on the base plate (1), each of the second cooling channels (8) radially extending from the center of the base plate (1) to the outside of the base plate (1), and each of the second cooling channels (8) and each of the first cooling channels (4) are alternately distributed along the circumference of the central cooling groove (3), and one end of each of the second cooling channels (8) facing the central cooling groove (3) is located radially outward of one end of each of the first cooling channels (4) facing the central cooling groove (3); the coolant entering from the inlet can be diverted into the central cooling groove (3) and each of the second cooling channels (8), and the coolant entering the central cooling groove (3) is diverted into each of the first cooling channels (4) and then flows out from the outlet, and the coolant entering each of the second cooling channels (8) also flows out from the outlet.

3. The cold plate assembly according to claim 2, wherein: A first diverter plate (5) is also assembled between the base plate (1) and the cover plate (2), and a first central flow hole (6) and a plurality of first flow channels (7) are formed on the first diverter plate (5), the first central flow hole (6) and each of the first flow channels (7) both pass through the first diverter plate (5), and each of the first flow channels (7) surrounds the periphery of the first central flow hole (6); the inlet is connected to the central cooling groove (3) through the first central flow hole (6), one end of each of the first flow channels (7) is connected to the first central flow hole (6), and the other end of each of the first flow channels (7) is respectively connected to each of the second cooling channels (8), and the end of each of the second cooling channels (8) away from each of the first flow channels (7) is connected to the outlet.

4. The cold plate assembly according to claim 3, wherein: A first circumferential guide groove (9) is also formed on the first diverter plate (5), and the first circumferential guide groove (9) surrounds the periphery of the first central flow hole (6). Each of the first flow channels (7) surrounds the periphery of the first circumferential guide groove (9), and each of the first flow channels (7) is connected to the first central flow hole (6) through the first circumferential guide groove (9).

5. The cold plate assembly according to claim 3, wherein: A first collecting channel (10) is also formed on the first diverter plate (5), and the first collecting channel (10) runs through the first diverter plate (5). The first collecting channel (10) is located at the periphery of each first flow channel (7) and close to the edge of the first diverter plate (5), and each first cooling channel (4) and each second cooling channel (8) are connected to the outlet through the first collecting channel (10).

6. The cold plate assembly according to claim 5, wherein: A plurality of third cooling channels (15) are also formed on the base plate (1), and each of the third cooling channels (15) extends radially from the center of the base plate (1) to the outside of the base plate (1), and each of the first cooling channels (4), each of the second cooling channels (8) and each of the third cooling channels (15) are alternately distributed along the circumference of the middle cooling groove (3), and one end of each of the third cooling channels (15) facing the middle cooling groove (3) is located radially outside one end of each of the second cooling channels (8) facing the middle cooling groove (3), and the coolant entering from the inlet can also be diverted into each of the third cooling channels (15), and the coolant entering each of the third cooling channels (15) also flows out from the outlet.

7. The cold plate assembly according to claim 6, wherein: A plurality of second flow passages (11) are further formed on the first diverter plate (5), each of the second flow passages (11) passes through the first diverter plate (5), and each of the second flow passages (11) surrounds the periphery of each of the first flow passages (7); a second diverter plate (12) is further assembled between the first diverter plate (5) and the cover plate (2), and a second middle flow hole (13) and a plurality of third flow passages (14) are formed on the second diverter plate (12), and the second middle flow hole (13) and each of the third flow passages (14) pass through the second diverter plate (12), and each of the third flow passages (14) surrounds the periphery of the first flow passages (7). The periphery of the second middle flow hole (13); the inlet, the second middle flow hole (13), the first middle flow hole (6), and the middle cooling groove (3) are connected in sequence, one end of each third flow channel (14) is connected to the second middle flow hole (13), the other end of each third flow channel (14) is connected to each second flow channel (11), one end of each second flow channel (11) away from each third flow channel (14) is connected to each third cooling channel (15), and one end of each third cooling channel (15) away from each second flow channel (11) is connected to the outlet.

8. The cold plate assembly according to claim 7, wherein: A second circumferential guide groove (16) is further formed on the second diverter plate (12), and the second circumferential guide groove (16) surrounds the periphery of the second central flow hole (13). Each of the third flow channels (14) surrounds the periphery of the second circumferential guide groove (16), and each of the third flow channels (14) is connected to the second central flow hole (13) through the second circumferential guide groove (16).

9. The cold plate assembly according to claim 7, wherein: A second collecting channel (17) is also formed on the second diverter plate (12), and the second collecting channel (17) passes through the second diverter plate (12). The second collecting channel (17) is located at the periphery of each of the third flow channels (14) and close to the edge of the second diverter plate (12). Each of the first cooling channels (4), each of the second cooling channels (8) and each of the third cooling channels (15) is connected to the outlet through the first collecting channel (10) and the second collecting channel (17) in sequence.

10. The cold plate assembly according to claim 9, wherein: The base plate (1) is also provided with a plurality of fourth cooling channels (23), each of which extends radially from the center of the base plate (1) to the outside of the base plate (1), and each of the first cooling channels (4), each of the second cooling channels (8), each of the third cooling channels (15) and each of the fourth cooling channels (23) are alternately distributed along the circumference of the middle cooling groove (3), and one end of each of the fourth cooling channels (23) facing the middle cooling groove (3) is located radially outside one end of each of the third cooling channels (15) facing the middle cooling groove (3), and the coolant entering from the inlet can also be diverted into each of the fourth cooling channels (23), and the coolant entering each of the fourth cooling channels (23) also flows out from the outlet.

11. The cold plate assembly according to claim 10, wherein: A plurality of fourth flow channels (18) are also formed on the first diverter plate (5), and each of the fourth flow channels (18) passes through the first diverter plate (5), and each of the fourth flow channels (18) surrounds the periphery of each of the second flow channels (11). A plurality of fifth flow channels (19) are also formed on the second diverter plate (12), and each of the fifth flow channels (19) passes through the second diverter plate (12), and each of the fifth flow channels (19) surrounds the periphery of each of the third flow channels (14). A third diverter plate (20) is also assembled between the second diverter plate (12) and the cover plate (2), and a third middle flow hole (21) and a plurality of sixth flow channels (22) are formed on the third diverter plate (20), and the third middle flow hole (21) and each of the sixth flow channels (22) pass through the third diverter plate (20), and each of the third middle flow holes (21) and the sixth flow channels (22) pass through the third diverter plate (20), and each of the third flow channels (22) passes through the third diverter plate (20), and each of the third flow channels (22) passes through the third diverter plate (20). Six flow channels (22) surround the periphery of the third central flow hole (21); the inlet, the third central flow hole (21), the second central flow hole (13), the first central flow hole (6), and the central cooling groove (3) are connected in sequence, one end of each of the sixth flow channels (22) is connected to the third central flow hole (21), the other end of each of the sixth flow channels (22) is connected to each of the fifth flow channels (19), one end of each of the fifth flow channels (19) away from each of the sixth flow channels (22) is connected to each of the fourth flow channels (18), one end of each of the fourth flow channels (18) away from each of the fifth flow channels (19) is connected to each of the fourth cooling channels (23), and one end of each of the fourth cooling channels (23) away from each of the fourth flow channels (18) is connected to the outlet.

12. The cold plate assembly according to claim 11, wherein A third circumferential guide groove (24) is also formed on the third diverter plate (20), and the third circumferential guide groove (24) surrounds the periphery of the third central flow hole (21). Each of the sixth flow channels (22) surrounds the periphery of the third circumferential guide groove (24), and each of the sixth flow channels (22) is connected to the third central flow hole (21) through the third circumferential guide groove (24).

13. The cold plate assembly according to claim 11, wherein A third collecting channel (25) is also formed on the third diverter plate (20), and the third collecting channel (25) passes through the third diverter plate (20), and the third collecting channel (25) is located at the periphery of each of the sixth flow channels (22) and close to the edge of the third diverter plate (20), and each of the first cooling channels (4), each of the second cooling channels (8), each of the third cooling channels (15) and each of the fourth cooling channels (23) are connected to the outlet through the first collecting channel (10), the second collecting channel (17) and the third collecting channel (25) in sequence.

14. The cold plate assembly according to any one of claims 1 to 13, characterized in that A plurality of spoiler columns (26) located in the central cooling groove (3) are also formed on the bottom plate (1), and the spoiler columns (26) are spaced apart and distributed in the central cooling groove (3).

15. The cold plate assembly according to any one of claims 1 to 13, characterized in that The inlet is located at the center of the cover plate (2), and there are multiple outlets, each of which is distributed at intervals along the circumference of the cover plate (2), and each of the outlets is close to the edge of the cover plate.

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