Liquid cooling cold plate device configured with micro-channel enhanced heat transfer

Abstract

The application provides a liquid cooling cold plate device with micro-channel reinforced heat exchange, and belongs to the technical field of liquid cooling cold plates.The device comprises a shell, a heat conduction plate arranged at the top of the shell, a heat insulation plate arranged in the shell, and a cooling plate arranged between the heat conduction plate and the heat insulation plate.The cooling plate comprises an upper plate and a lower plate, and a cooling flow channel is formed between the upper plate and the lower plate.Both ends of the shell are provided with flow collecting blocks, and flow collecting cavities are arranged in the flow collecting blocks.The two groups of flow collecting cavities are connected through the cooling flow channel, and the two groups of flow collecting blocks are provided with ports at one end.The two groups of ports are connected with external cooling equipment pipelines.One group of flow collecting blocks is provided with a water inlet at the bottom, and the other group of flow collecting blocks is provided with a blowdown outlet.The water inlet and the blowdown outlet are connected through pipelines, and a blowdown valve is arranged on the connecting pipeline.A control module is arranged below the heat insulation plate.The device is composed of two groups of slow flow cavities and multiple groups of branch flow channels, and is provided with a cooling flow channel matched with a filter block, a blowdown outlet and a blowdown valve, so that the device can clean dirt and impurities.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of liquid cooling cold plate, more particularly relates to a liquid cooling cold plate device with micro-channel enhanced heat exchange. BACKGROUND

[0002] In the field of electronic equipment heat dissipation, heat dissipation devices are often used to dissipate heat. For example, in a data center, a large number of servers are densely operated. In order to ensure the stable operation of the servers and prevent performance degradation or even hardware damage due to overheating, the heat dissipation system often uses liquid cooling technology. At this time, a liquid cooling cold plate device is needed to absorb and transfer the heat generated by the servers, so as to maintain a suitable working temperature for the servers.

[0003] However, in the conventional cold plate, a spiral cooling flow channel is often used, which often accumulates dirt and impurities over a long period of use, reducing the cross-sectional area of the cooling flow channel. However, the conventional spiral cooling flow channel usually does not have self-cleaning capability, so that in the daily operation process, the small particles and impurities carried in the cooling liquid gradually adhere to the inner wall of the spiral flow channel over time, making it difficult to clean. These accumulated dirt and impurities, under the combined action of fluid pressure and heat exchange, are prone to cause local blockage of the flow channel, which can cause poor flow of the cooling liquid. Not only will it affect the heat dissipation efficiency, causing local overheating of the equipment, reducing the performance and even causing failure, but also it will need frequent shutdown for manual cleaning and maintenance. SUMMARY

[0004] To solve the above technical problems, the application provides a liquid cooling cold plate device with micro-channel enhanced heat exchange to solve the technical problems of the prior art, such as the accumulation of dirt and impurities in the spiral cooling flow channel, the difficulty of cleaning, and the influence of heat dissipation efficiency.

[0005] The purpose and effect of the liquid cooling cold plate device with micro-channel enhanced heat exchange are achieved by the following specific technical means:

[0006] A liquid cooling cold plate device with micro-channel enhanced heat exchange comprises an outer shell, a heat conduction plate is arranged on the top of the outer shell, a heat insulation plate is arranged in the outer shell, and a cooling plate is arranged between the heat conduction plate and the heat insulation plate.

[0007] The top of the cooling plate is in contact with the bottom of the heat conduction plate, and the bottom of the cooling plate is in contact with the top of the heat insulation plate.

[0008] The cooling plate comprises an upper plate and a lower plate, and a cooling flow channel is formed between the upper plate and the lower plate.

[0009] Both ends of the shell are provided with current collecting blocks, the current collecting blocks are provided with current collecting cavities, two groups of current collecting cavities are communicated through the cooling flow channels, both ends of two groups of current collecting blocks are provided with ports, and two groups of ports are connected with pipelines of external cooling equipment;

[0010] One group of current collecting blocks is provided with water inlets at the bottom, and the other group of current collecting blocks is provided with sewage outlets at the bottom;

[0011] The water inlets and the sewage outlets are connected with pipelines, and a sewage valve is arranged on the connecting pipeline;

[0012] The heat insulation plate is provided below the control module.

[0013] According to a preferred embodiment, a sealing gasket is arranged between the upper plate and the lower plate, a sealing groove is arranged on the lower plate, the sealing gasket is clamped on the side of the sealing groove, and the upper plate is provided with a sealing protrusion;

[0014] The sealing protrusion is in contact with the bottom of the sealing groove, and the upper plate and the lower plate are connected through a plurality of bolts.

[0015] According to a preferred embodiment, the cooling flow channel comprises two groups of slow flow cavities and a plurality of shunt flow channels, and the two groups of slow flow cavities are communicated through a plurality of shunt flow channels;

[0016] One group of the slow flow cavities is provided with a plurality of guide plates and two groups of mounting half-seats, and the two groups of mounting half-seats are arranged on the upper plate and the lower plate respectively;

[0017] The mounting half-seats are provided with mounting rods, the mounting rods are provided with sealing sleeves at both ends, and the mounting rods are clamped on the upper plate and the lower plate through the sealing sleeves;

[0018] A shunt cavity and a plurality of inlet and outlet ports are formed between the two groups of mounting half-seats, and the plurality of inlet and outlet ports correspond to the plurality of shunt flow channels;

[0019] The mounting rods are provided with a plurality of water blocking protrusions, and the plurality of water blocking protrusions are provided with water blocking rings;

[0020] One end of each of the plurality of guide plates faces the liquid inlet of the cooling plate, and the other end of each of the plurality of guide plates is aligned with the liquid inlet of the mounting half-seat.

[0021] According to a preferred embodiment, an adjusting cavity and a control cavity are further formed between the upper plate and the lower plate;

[0022] Both ends of the mounting rods are provided with limiting rods, and the two groups of limiting rods are provided with first springs, one end of the first spring is in contact with the limiting rod, and the other end of the first spring is in contact with the adjusting cavity;

[0023] One of the limiting rods is provided with a first armature, and the control cavity is provided with a first coil, and the first armature is located in the first coil;

[0024] The control module is electrically connected with the first coil.

[0025] According to a preferred embodiment, a water guide block is arranged at one end of the flow guide plate, and a Venturi structure is arranged on the water guide block;

[0026] The Venturi structure comprises a converging section, a throat and a diverging section which are sequentially communicated along the fluid flow direction, wherein the converging section is arranged at the inlet end of the flow guide plate, and the diverging section is arranged at the outlet end away from the flow guide plate and communicated with the shunt flow channel;

[0027] The converging section and the diverging section are both conical frustum flow channels, the converging section inlet is communicated with the liquid outlet of the mounting half seat, and the throat is an equal cross-section cylindrical flow channel.

[0028] According to a preferred embodiment, a valve hole is arranged in the water guide block, the valve hole is communicated with the throat, and a valve core is arranged in the valve hole;

[0029] A limiting block is arranged on the valve core, a limiting groove is arranged on the inner wall of the valve hole, and the limiting block is slidably connected with the valve core through the limiting groove;

[0030] A second coil is arranged on the water guide block, a top rod is arranged above the valve core, a second armature is sleeved on the top rod, a second spring is sleeved on the valve core, and the second armature is located in the second coil;

[0031] The control module is electrically connected with the second coil.

[0032] According to a preferred embodiment, a liquid storage tank is arranged above the lower plate, a plurality of groups of distribution pipes and a main pipe are arranged in the upper plate, and one end of each of the plurality of groups of distribution pipes is connected with the liquid storage tank through the main pipe;

[0033] An adsorption channel is arranged on the valve core, the other end of each of the distribution pipes is communicated with the throat through the adsorption channel, and a sealing sleeve is further sleeved on the valve core.

[0034] According to a preferred embodiment, a water stop valve and a water outlet block are arranged at one end of the shunt flow channel away from the flow guide plate, a water stop ball is arranged in the water outlet block, and a plurality of groups of water outlets are uniformly arranged on the water outlet block in the circumferential direction;

[0035] A compression spring is arranged between the water stop ball and the water outlet block, and the water stop ball is in contact with the water stop valve through the compression spring.

[0036] According to a preferred embodiment, the bottom of the other group of slow flow cavities is provided with a filter block, wherein the group of the flow collecting blocks is provided with a pressurizing pump on the connecting pipeline of the cooling plate, and the ports of the two groups of flow collecting blocks are respectively provided with control valves;

[0037] The control module is electrically connected with the pressurizing pump and the control valves respectively.

[0038] According to a preferred embodiment, the flow collecting blocks are respectively provided with temperature sensors, and the sewage outlet is provided with a water quality sensor, and the control module is electrically connected with the temperature sensors and the water quality sensor respectively.

[0039] Compared with the prior art, the present application has the following beneficial effects:

[0040] 1. The present application discards the traditional spiral cooling flow channel, adopts the cooling flow channel composed of two groups of slow flow cavities and multiple groups of sub-flow channels, and is provided with a filter block, a sewage outlet and a sewage valve, so that the device can clean the dirt and impurities, improve the self-cleaning ability and long-term operation stability of the device. The device is provided with a filter block at the bottom of the slow flow cavity to preliminarily intercept the small particles and impurities in the cooling liquid, and then the sewage outlet and the sewage valve are used to regularly discharge the impurity-containing cooling liquid, so as to avoid the accumulation of dirt and impurities in the cooling flow channel, and ensure that the cooling flow channel is always unobstructed. This improves the ability of the device to maintain good heat dissipation efficiency for a long time in various equipment requiring heat dissipation, avoids the influence of equipment performance caused by flow channel blockage, and reduces the equipment downtime caused by cleaning and maintenance.

[0041] 2. When using the device, the temperature and water quality of the cooling liquid can be monitored through the temperature sensor in the flow collecting block and the water quality sensor at the sewage outlet, so that the device can detect the heat dissipation abnormality and the degree of cooling liquid pollution in time, and improve the sensing ability of the device to the running state. Then, relying on the electrical connection of the control module with the temperature sensor, the water quality sensor, the pressurizing pump and the control valve, the device can automatically adjust the flow rate, flow and other parameters of the cooling liquid according to the monitoring data, and respond to the changes of heat dissipation demand and water quality problems in time. This makes the device widely applicable to various equipment requiring heat dissipation, ensures the stable operation of the equipment, reduces the risk of equipment failure caused by local overheating or cooling liquid problems, and improves the ability of the device to ensure the stable operation of the equipment in different application scenarios.

[0042] 3、The present application sets water guide block, venturi structure and cooperating valve core, liquid storage tank and other components in the shunt flow channel, so that the device can strengthen the mixing and impurity adsorption of the coolant, improve the comprehensive ability of heat dissipation and impurity treatment of the device. The device uses the venturi structure to change the flow rate of the coolant to generate a pressure difference, which promotes the clean liquid in the liquid storage tank to mix with the coolant through the liquid separation pipe and the adsorption channel. In this way, the heat exchange efficiency can be enhanced, and the impurities in the coolant can be further adsorbed and cleaned by using the adsorption channel, which improves the ability of the device to optimize the quality of the coolant and improve the heat dissipation effect in various heat dissipation scenarios, so that it is suitable for more extensive heat management demand scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 is a structural schematic view of the shell of the present application;

[0044] Figure 2 is a structural schematic view of the heat conduction plate of the present application;

[0045] Figure 3 is Figure 2 is an enlarged view of the a area in

[0046] Figure 4 is a structural schematic view of the lower plate of the present application;

[0047] Figure 5 is a structural schematic view of the upper plate of the present application;

[0048] Figure 6 is a structural schematic view of the mounting rod of the present application;

[0049] Figure 7 is a structural schematic view of the water outlet block of the present application;

[0050] Figure 8 is a front view of the present application;

[0051] Figure 9 is a structural schematic view of the liquid storage tank of the present application;

[0052] Figure 10 is Figure 9 is an enlarged view of the b area in

[0053] Figure 11 is a structural schematic view of the water stop ball of the present application;

[0054] Figure 12 is a structural schematic view of the temperature sensor of the present application;

[0055] Figure 13 is a principle framework diagram of the present application.

[0056] In the figure, the correspondence between the component names and the reference signs is as follows:

[0057] 11. Housing; 12. Heat conducting plate; 13. Heat insulating plate; 14. Upper plate; 141. Sealing protrusion; 15. Lower plate; 151. Sealing groove; 16. Drain valve; 17. Manifold; 171. Manifold chamber; 172. Control valve; 173. Water quality sensor; 18. Control module; 19. Sealing gasket; 21. Slow flow chamber; 22. Diverter channel; 23. Guide plate; 24. Mounting half seat; 25. Mounting rod; 251. Water retaining protrusion; 252. Water retaining ring; 26. Sealing sleeve; 27. Limit rod; 28. First spring Spring; 29. ​​First armature; 31. First coil; 32. Water guide block; 321. Contraction section; 322. Throat; 323. Expansion section; 324. Valve hole; 325. Adsorption channel; 33. Valve core; 333. Sealing sleeve; 34. Second coil; 35. Push rod; 36. Second armature; 37. Second spring; 38. Liquid storage tank; 39. Liquid distribution pipe; 41. Main pipe; 42. Water stop flap; 43. Water outlet block; 44. Water stop ball; 45. Compression spring; 46. Filter block; 47. Pressure pump; 48. Temperature sensor. DETAILED DESCRIPTION

[0058] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solutions of the present invention, but are not intended to limit the scope of protection of the present invention.

[0059] Example: Figures 1 to 13 As shown, the present invention provides a liquid-cooled cold plate device configured with microchannel enhanced heat exchange, including a shell 11, a heat conducting plate 12 is provided on the top of the shell 11, a heat insulating plate 13 is provided inside the shell 11, and a cooling plate is provided between the heat conducting plate 12 and the heat insulating plate 13; the top of the cooling plate is in contact with the bottom of the heat conducting plate 12, and the bottom of the cooling plate is in contact with the top of the heat insulating plate 13; the shell 11 serves as a protective body for the entire device, providing protection for the internal components. The heat conducting plate 12 at the top can absorb the heat generated by the external object that needs to dissipate heat, and conduct the heat to the cooling plate below. The heat insulating plate 13 prevents heat from being transferred to the bottom of the shell 11, reducing heat loss, improving energy utilization efficiency, and ensuring that the device uses more energy to cool the heat source rather than useless heat loss.

[0060] The cooling plate includes an upper plate 14 and a lower plate 15, and a cooling channel is formed between the upper plate 14 and the lower plate 15. The coolant flows in the cooling channel in the cooling plate to take away the heat. The heat conducting plate 12 of the device can be made of copper, and the heat insulating plate 13 can be made of rock wool board. The outer shell 11 includes an outer layer of iron sheet and an inner layer is provided with an insulation layer to maintain a certain temperature inside the outer shell 11 to prevent the generation of condensed water.

[0061] The two ends of the shell 11 are provided with current collecting blocks 17, and the current collecting blocks 17 are provided with current collecting cavities 171. The two groups of current collecting cavities 171 are connected through cooling flow channels, and the two groups of current collecting blocks 17 are provided with ports at one end. The two groups of ports are connected with the pipelines of external cooling equipment. In this way, the circulation and flow of the cooling liquid between the liquid cooling cold plate device and the external cooling equipment are realized, and a complete heat exchange system is constructed. The current collecting block 17 serves as the hub of the gathering and distribution of the cooling liquid, and the current collecting cavity 171 in the current collecting block 17 provides a temporary storage and buffer space for the cooling liquid, so that the cooling liquid can smoothly enter and exit the cooling flow channel. When the cooling liquid flows into the current collecting cavity 171 from the external cooling equipment through the port, the current collecting cavity 171 can distribute the cooling liquid to the cooling flow channel connected thereto, so as to ensure that the flow distribution of the cooling liquid in the cooling flow channel is relatively balanced, and then the overall heat dissipation efficiency of the cooling flow channel is improved. The ports provided on the two end current collecting blocks 17 are interfaces for connecting the device with the external cooling equipment.

[0062] One group of current collecting blocks 17 is provided with a water inlet at the bottom, and the other group of current collecting blocks 17 is provided with a sewage outlet at the bottom. The water inlet and the sewage outlet are connected through pipelines, and a sewage valve 16 is arranged on the connecting pipeline. In this way, an impurity cleaning and cooling liquid maintenance system of the liquid cooling cold plate device is constructed. The sewage outlet at the bottom of the current collecting block 17 discharges impurities and sewage. The water inlet and the sewage outlet are connected through the pipeline with the sewage valve 16. The conventional circulation can be cut off and the flushing process can be started when necessary, so as to maintain the performance of the cooling liquid and the heat dissipation efficiency of the device, and ensure the long-term stable operation of the device. The sewage valve 16 can be a QV41 type electric ball valve, and the opening and closing of the sewage valve 16 can be realized through the control module 18. The sewage outlet is connected with an external sewage pipe.

[0063] The control module 18 is arranged below the heat insulation plate 13. The heat insulation plate 13 can block the low-temperature influence from the upper cooling area on the control module 18, and the control module 18 can control the transmission and processing of signals. The control module 18 can be an ArduinoMega2560 type microcontroller.

[0064] As shown in Figures 2 to 5 The sealing gasket 19 is arranged between the upper plate 14 and the lower plate 15, the sealing recess 151 is arranged on the lower plate 15, the sealing gasket 19 is clamped on the side of the sealing recess 151, and the upper plate 14 is provided with a sealing protrusion 141. The sealing protrusion 141 is in contact with the bottom of the sealing recess 151, and the upper plate 14 and the lower plate 15 are connected through a plurality of bolts.

[0065] In this way, the reliable sealing performance between the upper plate 14 and the lower plate 15 of the cooling plate is ensured. The sealing gasket 19 is arranged between the sealing protrusion 141 of the upper plate 14 and the sealing groove 151 of the lower plate 15. When the upper plate 14 and the lower plate 15 are fastened by bolts, the sealing protrusion 141 is embedded in the sealing gasket 19 and is pressed down, so as to be filled in the sealing groove 151. On the one hand, the structure utilizes the elastic deformation of the sealing gasket 19 itself to fill the gap between the upper plate 14 and the lower plate 15, so as to prevent the leakage of the cooling liquid. On the other hand, the sealing groove 151 provides the positioning for the sealing gasket 19, so as to avoid the displacement of the sealing gasket 19 during the installation or operation, to ensure the stability and reliability of the sealing, to guarantee the normal circulation of the cooling liquid in the cooling flow channel, and to maintain the good heat dissipation performance of the device. Further, through the detachable connection, the production difficulty of the cooling plate is reduced, and the cleaning is facilitated. The sealing gasket 19 can be made of fluororubber.

[0066] As shown in Figures 2 to 8 The cooling flow channel includes two groups of flow slowing cavities 21 and multiple groups of flow dividing flow channels 22. The two groups of flow slowing cavities 21 are communicated through the multiple groups of flow dividing flow channels 22. The cooling flow channel is composed of the two groups of flow slowing cavities 21 and the multiple groups of flow dividing flow channels 22 and is communicated with each other. The flow slowing cavity 21 can buffer the cooling liquid, reduce the flow rate, reduce the turbulent flow and pressure fluctuation, and distribute the cooling liquid. The multiple groups of flow dividing flow channels 22 increase the contact area between the cooling liquid and the cooling plate, prolong the heat exchange path and time, fully absorb the heat, improve the heat dissipation efficiency, and ensure that the device stably cools the heat source.

[0067] One of the groups of flow slowing cavities 21 is provided with multiple groups of flow guide plates 23 and two groups of mounting half seats 24. The two groups of mounting half seats 24 are arranged on the upper plate 14 and the lower plate 15, respectively. In this way, the flow state of the cooling liquid in the flow slowing cavity 21 is further optimized. The flow guide plate 23 can guide the flow direction of the cooling liquid, so that the cooling liquid can flow more stably into the flow dividing flow channel 22, and the stability of the heat exchange is improved. The mounting half seat 24 is arranged on the upper plate 14 and the lower plate 15, respectively. Not only does it provide a mounting base for other components, but also the structure matched with each other helps to stabilize the internal components and ensure the structural stability of the entire cooling flow channel during long-term operation.

[0068] The mounting half seat 24 is provided with a mounting rod 25. The mounting rod 25 is provided with a sealing sleeve 26 at both ends. The mounting rod 25 is clamped on the upper plate 14 and the lower plate 15 through the sealing sleeve 26. In this way, the connection and sealing of the mounting rod 25 between the upper plate 14 and the lower plate 15 are realized. The mounting rod 25 is clamped on the upper plate 14 and the lower plate 15 by means of the sealing sleeve 26 at both ends, so as to provide stable support for the related components in the cooling flow channel and ensure the structural stability. The sealing sleeve 26 prevents the cooling liquid from leaking from the connection between the mounting rod 25 and the upper plate 14 and the lower plate 15, maintains the sealing performance of the cooling flow channel, guarantees the normal circulation of the cooling liquid, and avoids the influence of the leakage on the heat dissipation effect and the performance of the device.

[0069] The shunt cavity is formed between the two groups of mounting half seats 24, and a plurality of liquid inlet and outlet ports are formed, which correspond to the plurality of shunt flow channels 22;

[0070] The mounting rod 25 is provided with a plurality of water blocking protrusions 251, and each water blocking protrusion 251 is provided with a water blocking ring 252. The cooling liquid in the slow flow cavity 21 can be shunted to each shunt flow channel 22, optimizing the distribution of the cooling liquid and improving the uniformity of cooling. The plurality of water blocking protrusions 251 and the water blocking rings 252 provided on the mounting rod 25 can further regulate the flow of the cooling liquid in the shunt cavity. The water blocking protrusions 251 change the local flow direction of the cooling liquid, and the water blocking rings 252 enhance the sealing effect, preventing the cooling liquid from leaking during the shunting process, ensuring that the cooling liquid flows into the shunt flow channel 22 according to the predetermined path, and ensuring the stable operation of the cooling flow channel.

[0071] Each of the plurality of flow guide plates 23 has one end facing the liquid inlet of the cooling plate and the other end aligned with the liquid inlet of the mounting half seat 24.

[0072] The upper plate 14 and the lower plate 15 also form an adjusting cavity and a control cavity therebetween. The mounting rod 25 is provided with a limiting rod 27 at both ends, and the two limiting rods 27 are each provided with a first spring 28. One end of the first spring 28 is in contact with the limiting rod 27, and the other end of the first spring 28 is in contact with the adjusting cavity. One of the limiting rods 27 is provided with a first armature 29, and the control cavity is provided with a first coil 31, and the first armature 29 is located in the first coil 31. The control module 18 is electrically connected with the first coil 31. The adjusting cavity and the control cavity between the upper plate 14 and the lower plate 15 cooperate with the related components to realize regulation and control. The limiting rod 27 and the first spring 28 form an elastic limiting structure, and the mounting rod 25 can be displaced and reset. The first armature 29 and the first coil 31 form an electromagnetic adjusting component. After the control module 18 supplies power to the first coil 31, a magnetic field is generated, which attracts or repels the first armature 29, drives the limiting rod 27 and the mounting rod 25 to move, changes the position of the flow guide plate 23, and then adjusts the flow state of the cooling liquid to adapt to different heat dissipation requirements.

[0073] Specifically, the device controls the movement of the mounting rod 25 through electromagnetic and the first spring 28, thereby regulating the number of flow channels. The control module 18 sends an electrical signal to the first coil 31 in the control cavity according to the heat dissipation requirement of the equipment, and the energized first coil 31 generates a magnetic field to exert a force on the first armature 29, driving the limit rod 27 and the mounting rod 25 connected thereto to displace. The water blocking protrusion 251 and the water blocking ring 252 on the mounting rod 25 cooperate with the inlet and outlet of the flow distribution cavity, and when moving, they change the on-off of the inlet and outlet, control the inflow of the cooling liquid in the flow distribution channel 22, and realize the number control of the flow channel. The first spring 28 on the limit rod 27 plays a role in resetting when the mounting rod 25 moves, and pushes it back to the initial position when the magnetic field disappears, restoring the flow channel conduction. Such a setting brings many benefits: it can adjust the flow channel according to the heat generation of the equipment, increase the conduction flow channel to strengthen heat dissipation when the heat generation is large, reduce the flow channel to avoid energy waste when the heat generation is small, and improve the energy utilization efficiency; make the cooling liquid distribution more reasonable, avoid local overheating, and prolong the service life of the equipment; the mounting rod 25 is connected with the sealing sleeve 26, the upper plate 14 and the lower plate 15, which ensures the stability of the structure and the sealing of the flow channel, and avoids the influence of cooling liquid leakage on heat dissipation.

[0074] As shown in Figures 2 to 10 , the flow distribution channel 22 is provided with a water guide block 32 near one end of the flow guide plate 23, and the water guide block 32 is provided with a Venturi structure; the Venturi structure includes a convergent section 321, a throat 322 and a divergent section 323 which are sequentially communicated along the flow direction, wherein the inlet end of the convergent section 321 is close to the flow guide plate 23, and the outlet end of the divergent section 323 is away from the flow guide plate 23 and is communicated with the flow distribution channel 22; the convergent section 321 and the divergent section 323 are both conical frustum flow channels, the inlet of the convergent section 321 is communicated with the liquid outlet of the mounting half seat 24, and the throat 322 is an equal-section cylindrical flow channel. When the cooling liquid flows out of the flow guide plate 23, it enters the convergent section 321 of the Venturi structure. The inlet end of the convergent section 321 is close to the flow guide plate 23, and the pipe diameter gradually decreases along the flow direction. According to the continuity equation in fluid mechanics, that is, the fluid volume passing through any cross section of the flow pipe per unit time remains unchanged, and according to the Bernoulli principle, under the condition of ideal fluid steady flow, the flow rate and the pressure have a certain relationship. Under the premise that the cooling liquid flow is constant, with the gradual reduction of the pipe diameter of the convergent section 321, the flow rate of the cooling liquid must be accelerated, and the pressure is correspondingly reduced. The acceleration of the flow rate enables it to quickly rush to the throat 322. The throat 322 is the part with the most narrow pipe diameter in the Venturi structure, and here the flow rate of the cooling liquid reaches a peak value. The cooling liquid can carry the heat absorbed from the heat source forward at a faster speed, improving the rate of heat transfer.

[0075] Then, the cooling liquid flows into the expansion section 323. The pipe diameter of the expansion section 323 gradually increases, and the flow rate of the cooling liquid decreases due to the change in the pipe diameter. However, attention should be paid to the fact that the high flow rate accumulated in the contraction section 321 and the throat 322 greatly increases the average flow rate of the cooling liquid in the entire Venturi structure. Moreover, as the pipe diameter increases, the pressure in the expansion section 323 gradually recovers. The recovery of the pressure helps the cooling liquid more fully fill the flow distribution channel 22, avoids local flow rate unevenness or poor flow, and further ensures that the cooling liquid can continuously and quickly flow in the flow distribution channel 22.

[0076] The water guide block 32 is provided with a valve hole 324 that is in communication with the throat 322, and the valve hole 324 is provided with a valve core 33. The valve core 33 is provided with a limiting block, and the inner wall of the valve hole 324 is provided with a limiting groove. The limiting block is in sliding connection with the valve core 33 through the limiting groove. The valve hole 324 in the water guide block 32 is in communication with the throat 322, and the valve core 33 is arranged in the valve hole 324, so as to adjust the flow rate of the cooling liquid passing through the throat 322. The limiting block on the valve core 33 is in sliding connection with the limiting groove in the inner wall of the valve hole 324. On the one hand, the limiting block limits the movement track of the valve core 33, so that the valve core 33 can only move axially along the valve hole 324, and the stability of the adjusting action is ensured. On the other hand, the limiting block prevents the valve core 33 from being separated from the valve hole 324, and the structural reliability is ensured. By controlling the position of the valve core 33 in the valve hole 324, the flow area of the cooling liquid flowing through the valve hole 324 is changed, and then the flow rate and the flow rate of the cooling liquid entering the flow distribution channel 22 are adjusted, so as to adapt to different heat dissipation requirements and optimize the heat dissipation performance of the entire cooling system.

[0077] The water guide block 32 is provided with a second coil 34, the valve core 33 is provided with a top rod 35, the top rod 35 is provided with a second armature 36, the valve core 33 is provided with a second spring 37, and the second armature 36 is located in the second coil 34. The control module 18 is in electrical connection with the second coil 34. In this way, a cooling liquid flow rate adjusting structure based on electromagnetic control is constructed. The second coil 34 on the water guide block 32 is in electrical connection with the control module 18 and receives the electrical signal sent by the control module 18. When the control module 18 sends an instruction according to the heat dissipation requirement of the equipment, the second coil 34 is electrified to generate a magnetic field. The second armature 36 located in the second coil 34 is subjected to an electromagnetic force upward or downward under the action of the magnetic field.

[0078] The second armature 36 is sleeved on the top rod 35 and moves together with the top rod 35. The top rod 35 is connected with the valve core 33 below, and the valve core 33 is sleeved with the second spring 37. When the second armature 36 is moved upward by the electromagnetic force, the top rod 35 pushes the valve core 33 to move upward against the elastic force of the second spring 37, the flow area of the valve hole 324 is increased, more cooling liquid can pass through the valve hole 324 into the shunt flow channel 22, the flow rate is correspondingly increased, and the heat dissipation capacity is enhanced. Conversely, when the electromagnetic force moves the second armature 36 downward, the valve core 33 moves downward under the action of the second spring 37, the flow area of the valve hole 324 is reduced, the flow rate of the cooling liquid is reduced, and the low heat dissipation demand scene is met.

[0079] The lower plate 15 is provided with a liquid storage tank 38, and the upper plate 14 is provided with a plurality of distribution pipes 39 and a main pipe 41. One end of each of the plurality of distribution pipes 39 is connected with the liquid storage tank 38 through the main pipe 41. The valve core 33 is provided with an adsorption channel 325, and the other end of each of the distribution pipes 39 is communicated with the throat portion 322 through the adsorption channel 325. The valve core 33 is further sleeved with a sealing sleeve 333. In this way, a cooling liquid storage and distribution system is formed. The liquid storage tank 38 stores a certain amount of cleaning liquid, and the cleaning liquid is delivered to the plurality of distribution pipes 39 through the main pipe 41, so as to realize preliminary distribution of the cleaning liquid. The adsorption channel 325 on the valve core 33 further improves the delivery path of the cleaning liquid. The other end of each of the distribution pipes 39 is communicated with the throat portion 322 through the adsorption channel 325, so that the cleaning liquid which has been preliminarily distributed can enter the throat portion 322 of the Venturi tube structure. The sealing sleeve 333 sleeved on the valve core 33 ensures the sealing property of the cleaning liquid when passing through the adsorption channel 325, guarantees the sealing property of the entire system, and maintains the normal flow and distribution of the cooling liquid. The cleaning liquid can be deionized water, and the cooling liquid can be ethylene glycol aqueous solution.

[0080] Specifically, when the temperature rises to a preset high temperature threshold, the control module 18 sends an electric signal to the second coil 34 on the water guide block 32. The second coil 34 generates a magnetic field when powered on, attracting the second armature 36 located therein to move upward. Since the second armature 36 is sleeved on the top rod 35, the top rod 35 drives the valve core 33 to move upward against the elastic force of the second spring 37, and the flow area of the valve hole 324 increases. At this time, more cooling liquid enters the shunt flow passage 22 from the valve hole 324, the flow rate increases, and the heat dissipation capacity is enhanced. Conversely, when the temperature decreases to a preset low temperature threshold, the control module 18 sends a reverse electric signal. The second coil 34 generates a reverse magnetic field, and the second armature 36 is subjected to a downward electromagnetic force. The valve core 33 moves downward under the action of the second spring 37, the flow area of the valve hole 324 decreases, and the cooling liquid flow and flow rate are reduced. In this process, the adsorption channel 325 can be connected to the shunt flow passage 22 by controlling the upward movement of the valve core 33. Based on the negative pressure effect generated by the throat 322 of the Venturi tube structure, a negative pressure area is formed at the adsorption channel 325 when the cooling liquid passes through the throat 322 quickly. This negative pressure environment can absorb the cleaning liquid in the liquid storage tank 38 through the main pipe 41, the liquid distribution pipe 39, and the adsorption channel 325 into the shunt flow passage 22, and flow together with the cooling liquid, thereby achieving cleaning of the entire cooling system internal flow passage.

[0081] As shown in Figure 2 , 4 , 5, 7, 8, 11, the shunt flow passage 22 is provided with a water stop valve 42 and a water outlet block 43 away from the guide plate 23. The water outlet block 43 is provided with a water stop ball 44, and a plurality of water outlets are uniformly arranged on the water outlet block 43 in the circumferential direction. A compression spring 45 is arranged between the water stop ball 44 and the water outlet block 43, and the water stop ball 44 is in contact with the water stop valve 42 through the compression spring 45. During normal flow, the cooling liquid pressure pushes the water stop valve 42 to overcome the elastic force of the compression spring 45, so that a gap is formed between the water stop valve 42 and the water stop ball 44. The cooling liquid uniformly flows out of the water outlet to the subsequent heat dissipation area, improving the heat dissipation uniformity. In an abnormal situation, such as a sudden pressure drop or backflow, the compression spring 45 pushes the water stop ball 44 to close the water outlet of the water stop valve 42, preventing the cooling liquid from flowing backward and ensuring the unidirectional flow. At the same time, this structure can dynamically adjust with the change of cooling liquid flow and pressure. When the flow is large, the thrust of the water stop valve 42 is large, the gap is increased, and when the flow is small, the gap is reduced, maintaining the stability of the flow and pressure in the system. The water stop valve 42 can be made of fluorine rubber.

[0082] Another group of slow flow cavity 21 bottom is provided with filter block 46, wherein a group of flow collecting block 17 and cooling plate connection pipeline is provided with pressurizing pump 47, the port of two groups of flow collecting block 17 is provided with control valve 172 respectively;Control module 18 is electrically connected with pressurizing pump 47 and control valve 172 respectively.Filter block 46 is used to filter the impurities of cooling liquid, and protect the system components.When the temperature of the equipment rises, control module 18 makes pressurizing pump 47 increase efficiency, and control valve 172 adjusts the opening degree, to enhance heat dissipation;When the temperature decreases, the reverse adjustment is realized to realize energy-saving cooling, ensure the stable operation of the system, and can realize power source for circulating cleaning.

[0083] As shown in Figure 2 , 8 , temperature sensor 48 is arranged in flow collecting block 17, and water quality sensor 173 is arranged at the sewage outlet, and control module 18 is electrically connected with temperature sensor 48 and water quality sensor 173 respectively.In the present application, temperature sensor 48 is arranged in flow collecting block 17 to monitor the temperature of cooling liquid in flow collecting block 17 and feedback to control module 18.By comparing the inlet temperature and outlet temperature of cooling liquid, control module 18 can maintain the temperature difference between inlet and outlet in a certain range according to the principles of heat transfer and fluid mechanics, such as the temperature difference is too large, which may cause the cooling flow to be blocked;From the heat transfer theory, the heat dissipation or abnormality may exist, which may cause the cooling liquid flow to be insufficient or the performance of the heat dissipation component to be reduced;Combined with the equipment operating condition data, environmental temperature and other factors, if the temperature difference gradually decreases with the running time and exceeds the normal fluctuation range, such as the average temperature difference decreases every month, which indicates that the heat dissipation component may be aging, and control module 18 gives an early warning accordingly to ensure the stable operation of the cooling system.When the cooling system discharges sewage, water quality sensor 173 at the sewage outlet begins to play a role.The sensor focuses on detecting various indicators in the discharged cooling liquid to judge the cleanliness of the cooling liquid, which includes suspended solids, dissolved solids and chemical pollutants, etc.When the cooling liquid is normally operated, the cooling liquid should be maintained at a certain cleanliness level.When the cooling liquid is discharged, water quality sensor 173 transmits the detected data to control module 18.If the detection result shows that the content of impurities, pollutants and other impurities in the cooling liquid is abnormal, which indicates that the cleanliness of the cooling liquid does not meet the standard, control module 18 will respond, or trigger an alarm to inform the maintenance personnel, or adjust the filtering device to increase the filtering intensity, to ensure that the discharged cooling liquid meets the cleanliness standard, and avoid damage to the system caused by cooling liquid pollution, and cooperate with temperature sensor 48 to ensure the stable operation of the cooling system.The water quality sensor 173 can use TH-S7 type water quality conductivity sensor, and the temperature sensor 48 can use OMEGA PT100-SS-6 type probe type temperature sensor.

[0084] The above shows and describes the basic principles and main features of the present application and the advantages of the present application, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments.

Claims

1. A liquid-cooled cold plate device configured with microchannel enhanced heat exchange, comprising a housing (11), characterized in that: A heat conducting plate (12) is provided on the top of the shell (11), a heat insulating plate (13) is provided inside the shell (11), and a cooling plate is provided between the heat conducting plate (12) and the heat insulating plate (13); The top of the cooling plate contacts the bottom of the heat conducting plate (12), and the bottom of the cooling plate contacts the top of the heat insulating plate (13); The cooling plate comprises an upper plate (14) and a lower plate (15), and a cooling channel is formed between the upper plate (14) and the lower plate (15); Both ends of the housing (11) are provided with manifold blocks (17), a manifold cavity (171) is provided in the manifold block (17), two groups of manifold cavities (171) are communicated with each other through the cooling channel, one end of each of the two groups of manifold blocks (17) is provided with a port, and the two groups of ports are connected to external cooling equipment pipelines; One group of the manifold blocks (17) has a water inlet at the bottom, and the other group of the manifold blocks (17) has a sewage outlet at the bottom; The water inlet is connected to the sewage outlet pipe, and a sewage valve (16) is provided on the connecting pipe; A control module (18) is provided below the heat insulation plate (13).

2. The liquid-cooled cold plate device with microchannel enhanced heat exchange according to claim 1, characterized in that: A sealing gasket (19) is provided between the upper plate (14) and the lower plate (15); a sealing groove (151) is provided on the lower plate (15); the sealing gasket (19) is clamped on the circumference of the sealing groove (151); and a sealing protrusion (141) is provided on the upper plate (14); The sealing protrusion (141) contacts the bottom of the sealing groove (151), and the upper plate (14) and the lower plate (15) are detachably connected via multiple sets of bolts.

3. The liquid-cooled cold plate device with microchannel enhanced heat exchange according to claim 2, characterized in that: The cooling flow channel comprises two groups of slow flow cavities (21) and multiple groups of diversion flow channels (22), and the two groups of slow flow cavities (21) are connected through multiple groups of diversion flow channels (22); One of the slow flow chambers (21) is provided with a plurality of guide plates (23) and two sets of mounting half seats (24), and the two sets of mounting half seats (24) are respectively arranged on the upper plate (14) and the lower plate (15); The mounting half seat (24) is provided with a mounting rod (25), both ends of the mounting rod (25) are provided with sealing sleeves (26), and the mounting rod (25) is clamped on the upper plate (14) and the lower plate (15) through the sealing sleeves (26); A diversion cavity and multiple groups of liquid inlet and outlet ports are formed between the two groups of mounting half seats (24), and the multiple groups of liquid inlet and outlet ports correspond to the multiple groups of diversion flow channels (22); The mounting rod (25) is provided with a plurality of groups of water retaining protrusions (251), and each of the plurality of groups of water retaining protrusions (251) is provided with a water retaining ring (252); The plurality of groups of guide plates (23) each have one end facing the liquid inlet of the cooling plate, and the other end aligned with the liquid inlet of the mounting half seat (24).

4. The liquid-cooled cold plate device with microchannel enhanced heat exchange according to claim 3, characterized in that: An adjustment cavity and a control cavity are also formed between the upper plate (14) and the lower plate (15); Limit rods (27) are provided at both ends of the installation rod (25), and first springs (28) are provided on both sets of the limit rods (27), one end of the first spring (28) contacts the limit rod (27), and the other end of the first spring (28) contacts the adjustment chamber; A first armature (29) is provided on one set of the limiting rods (27), a first coil (31) is provided in the control cavity, and the first armature (29) is located in the first coil (31); The control module (18) is electrically connected to the first coil (31).

5. The liquid-cooled cold plate device with microchannel enhanced heat exchange according to claim 4, characterized in that: A water guide block (32) is provided at one end of the diversion flow channel (22) close to the guide plate (23), and a Venturi tube structure is provided on the water guide block (32); The venturi tube structure comprises a contraction section (321), a throat section (322), and an expansion section (323) which are sequentially connected along the fluid flow direction, wherein the inlet end of the contraction section (321) is close to the guide plate (23), and the outlet end of the expansion section (323) is away from the guide plate (23) and is connected to the diversion channel (22); The contraction section (321) and the expansion section (323) are both truncated cone-shaped flow channels, the inlet of the contraction section (321) is connected to the liquid outlet of the mounting half seat (24), and the throat (322) is a cylindrical flow channel with a uniform cross-section.

6. The liquid-cooled cold plate device with microchannel enhanced heat exchange according to claim 5, characterized in that: A valve hole (324) is provided in the water guide block (32), the valve hole (324) is in communication with the throat portion (322), and a valve core (33) is provided in the valve hole (324); A limit block is provided on the valve core (33), a limit groove is provided on the inner wall of the valve hole (324), and the limit block is slidably connected to the valve core (33) via the limit groove; A second coil (34) is provided on the water guide block (32), a push rod (35) is provided above the valve core (33), a second armature (36) is sleeved on the push rod (35), a second spring (37) is sleeved on the valve core (33), and the second armature (36) is located in the second coil (34); The control module (18) is electrically connected to the second coil (34).

7. The liquid-cooled cold plate device with microchannel enhanced heat exchange according to claim 6, characterized in that: A liquid storage tank (38) is provided above the lower plate (15), and multiple groups of liquid pipes (39) and a main pipe (41) are provided in the upper plate (14), and one end of multiple groups of liquid distribution pipes (39) are connected to the liquid storage tank (38) through the main pipe (41); An adsorption channel (325) is provided on the valve core (33), and the other end of the liquid dispensing tube (39) is connected to the throat (322) through the adsorption channel (325). A sealing sleeve (333) is also provided on the valve core (33).

8. The liquid-cooled cold plate device with microchannel enhanced heat exchange according to claim 7, characterized in that: A water stop flap (42) and a water outlet block (43) are provided at one end of the diversion flow channel (22) away from the guide plate (23); a water stop ball (44) is provided in the water outlet block (43); and a plurality of water outlets are evenly arranged on the water outlet block (43) along the circumferential direction. A compression spring (45) is provided between the water-stopping ball (44) and the water outlet block (43), and the water-stopping ball (44) contacts the water-stopping flap (42) via the compression spring (45).

9. The liquid-cooled cold plate device with microchannel enhanced heat exchange according to claim 8, characterized in that: A filter block (46) is provided at the bottom of another group of slow flow chambers (21), a pressure pump (47) is provided on a pipe connecting one group of the collecting blocks (17) and the cooling plate, and control valves (172) are provided on ports of both groups of the collecting blocks (17); The control module (18) is electrically connected to the pressure pump (47) and the control valve (172) respectively.

10. The liquid-cooled cold plate device with microchannel enhanced heat exchange according to claim 1, characterized in that: A temperature sensor (48) is provided in each manifold block (17), a water quality sensor (173) is provided on the sewage outlet, and the control module (18) is electrically connected to the temperature sensor (48) and the water quality sensor (173), respectively.

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