Composite liquid cooling heat dissipation plate for liquid cooling system

Abstract

The invention relates to the technical field of liquid cooling heat dissipation, in particular to a composite liquid cooling heat dissipation plate for a liquid cooling system. Comprising a liquid cooling plate, a plurality of liquid cooling flow channels for cooling liquid to flow are arranged in the liquid cooling plate, the liquid cooling plate is fixedly connected with a liquid outlet pipe and a liquid inlet pipe which are communicated with the plurality of liquid cooling flow channels, a communicating ring is arranged in the liquid inlet pipe, and a through hole in the middle of the communicating ring is used for cooling liquid to enter the liquid cooling flow channels of the liquid cooling plate. A sliding piece is fixedly connected into the liquid inlet pipe, the sliding piece is connected with a sliding block in a sliding mode, and a flexible pipe is fixedly connected between the sliding block and the communicating ring. According to the invention, the slide block drives the liquid outlet end of the flexible pipe to perform linear reciprocating motion, so that the liquid outlet end of the flexible pipe is circularly close to the liquid cooling flow channels in the liquid cooling plate, thereby reducing the difference value of the flowing content of cooling liquid in each liquid cooling flow channel in unit time, and improving the heat dissipation uniformity of an electronic component on the surface of the liquid cooling plate.

Description

Technical Field

[0001] This invention relates to the field of liquid cooling technology, and in particular to a composite liquid cooling heat dissipation plate for liquid cooling systems. Background Technology

[0002] Composite liquid-cooled heat sinks are high-efficiency thermal management devices that integrate high thermal conductivity materials and liquid cooling technology. They are usually made of copper, aluminum, or their composite materials and have an integrated liquid cooling channel structure inside. Through the circulation of coolant, heat is quickly dissipated, achieving stable cooling of high-power electronic components. These heat sinks have advantages such as high heat dissipation efficiency, compact structure, and low operating noise, and have been widely used in high-performance electronic equipment, new energy vehicle battery systems, and data centers, as well as other fields with high thermal control requirements.

[0003] Composite liquid-cooled heat sinks mainly consist of a substrate, embedded liquid-cooling channels, a sealing insulation layer, and connectors. The connectors are used to connect to an external cooling system to form a complete circulation loop and are an indispensable key component in the entire cooling system. However, the connectors of existing heat sinks typically correspond to multiple parallel liquid-cooling channels, and their coolant injection positions are fixed. This results in a high coolant flow rate and volume in the channels near the interface area, while the channels far from the interface experience poor coolant flow due to resistance differences. This uneven flow distribution directly affects the heat exchange capacity between the liquid-cooling channels, leading to uneven temperature distribution on the heat sink surface. This reduces the overall heat dissipation effect and temperature consistency of electronic components, affecting the stability and lifespan of the equipment. Summary of the Invention

[0004] In order to overcome the shortcomings mentioned in the background art, the present invention provides a composite liquid cooling heat sink for liquid cooling systems.

[0005] The technical solution is as follows: A composite liquid cooling heat sink for a liquid cooling system includes a liquid cooling plate, wherein a plurality of liquid cooling channels for coolant flow are provided inside the liquid cooling plate, and an outlet pipe and an inlet pipe are fixedly connected to the liquid cooling plate and are connected to the plurality of liquid cooling channels. A connecting ring is provided inside the inlet pipe, and a through hole in the middle of the connecting ring is used for coolant to enter the liquid cooling channels of the liquid cooling plate. A sliding member is fixedly connected inside the inlet pipe, and a slider is slidably connected to the sliding member. A flexible tube is fixedly connected between the slider and the connecting ring, and the flexible tube is used to guide the flow direction of the coolant. A driving component for changing the position of the slider is provided on the inlet pipe.

[0006] Furthermore, the driving assembly includes a driving member disposed on the liquid inlet pipe. The liquid inlet pipe is rotatably connected to a driving shaft. The driving member is used to drive the driving shaft to rotate. The driving shaft is fixedly connected to a connecting rod located on the liquid inlet pipe. The connecting rod is used to drive the slider to move.

[0007] Furthermore, the slider is a straight rod, the sliding trajectory of the slider on the slider is a straight line, and the sliding trajectory of the slider on the slider is parallel to the adjacent side of the liquid cooling plate. The connecting rod is a telescopic rod, the fixed part of the connecting rod is fixedly connected to the drive shaft, and the telescopic end of the connecting rod is rotatably connected to the slider.

[0008] Furthermore, the liquid outlet direction of the flexible tube on the slider is always perpendicular to the adjacent side of the liquid cooling plate.

[0009] Furthermore, the connecting ring is provided with a plurality of second channels, and all the second channels on the connecting ring are connected together by a sealing bracket in a sealed sliding manner.

[0010] Furthermore, the second channels on the connecting ring are circumferentially evenly distributed to uniformly drive the flow of coolant in the inlet pipe.

[0011] Furthermore, an elastic element is provided between the sealing frame and the connecting ring, and the elastic element is used to drive the sealing frame to reset.

[0012] Furthermore, the sealing frame is fixedly connected to a sealing piston, which is used to seal the through hole in the middle of the connecting ring.

[0013] Furthermore, the sealing frame is fixedly connected to a push rod, the drive shaft is fixedly connected to a fixed disk, and the fixed disk is fixedly connected to two symmetrically distributed extrusion blocks, which are used to extrude and push the push rod.

[0014] Furthermore, the extrusion block is in the shape of a right-angled trapezoid, the bottom of the extrusion block is in contact with the outside of the fixed plate, and the opposing sides of the two extrusion blocks are sloping waists.

[0015] The beneficial effects of the present invention using the above structure are as follows: 1. The present invention causes the liquid outlet end of the flexible tube to move linearly back and forth by driving the slider, so that the liquid outlet end of the flexible tube circulates close to the liquid cooling channel in the liquid cooling plate, thereby reducing the difference in the amount of coolant flowing in each liquid cooling channel per unit time and improving the heat dissipation uniformity of electronic components on the surface of the liquid cooling plate.

[0016] 2. By ensuring that the outlet end of the flexible tube is always perpendicular to the liquid cooling channel of the liquid cooling plate, and with the cooperation of the sliding component and the connecting rod, the distance between the outlet end of the flexible tube and the liquid cooling channel inside the liquid cooling plate is always kept consistent, so as to ensure that the coolant in the flexible tube can smoothly and evenly enter the corresponding liquid cooling channel inside the liquid cooling plate.

[0017] 3. By periodically switching the flow direction of the coolant from the flexible tube to several second channels during the linear reciprocating motion at the outlet end of the flexible tube, the coolant can flow synchronously in the dead zone between the outlet end of the flexible tube and the connecting ring, reducing the probability of coolant sedimentation in the dead zone. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the liquid inlet pipe of the present invention; Figure 3 This is a three-dimensional structural diagram of the drive shaft and connecting rod of the present invention; Figure 4 This is a three-dimensional cross-sectional view of the connecting ring structure of the present invention; Figure 5 This is a three-dimensional structural diagram of the sealing frame and sealing piston of the present invention.

[0019] Reference numerals: 1: Liquid cooling plate, 2: Liquid outlet pipe, 3: Liquid inlet pipe, 4: Connecting ring, 5: Sliding component, 6: Sliding block, 7: Flexible tube, 201: Driving component, 202: Driving shaft, 203: Connecting rod, 301: Sealing frame, 302: Elastic component, 303: Sealing piston, 304: Push rod, 305: Fixed plate, 306: Extrusion block. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0021] Existing heat sinks typically connect to multiple parallel liquid cooling channels via their interface. However, due to the fixed injection point of the coolant, the liquid flow rate is higher and the volume is larger in the channel near the interface, while the channel farther from the interface experiences poor coolant flow due to differences in flow resistance. This uneven flow distribution directly affects the heat exchange efficiency between the channels, resulting in uneven temperature distribution on the heat sink surface. Decreased temperature uniformity not only weakens the heat dissipation capacity for electronic components but may also cause localized overheating, affecting the stability and lifespan of the equipment.

[0022] Example 1: This example discloses a composite liquid cooling heat sink for a liquid cooling system, which is mainly used to improve the heat dissipation uniformity of the liquid cooling heat sink.

[0023] like Figures 1-3 As shown, the device includes a liquid-cooled plate 1, which contains several liquid-cooled channels for coolant flow. The left and right sides of the front of the liquid-cooled plate 1 are respectively fixedly connected to an outlet pipe 2 and an inlet pipe 3, both communicating with the liquid-cooled channels. The outlet pipe 2 and inlet pipe 3 are connected to both ends of the liquid-cooled channels within the liquid-cooled plate 1, and both are connected to an external coolant circulation system. Both the outlet pipe 2 and inlet pipe 3 are flared, with the opening on the side closest to the liquid-cooled plate 1 larger than the other side, reducing dead zones in coolant flow. A connecting ring 4 is provided inside the inlet pipe 3, with a through hole in the center for coolant to enter the liquid-cooled channels of the liquid-cooled plate 1. A sliding... The moving part 5 and the sliding part 5 are slidably connected to the slider 6. The slider 6 and the connecting ring 4 are fixedly connected to the flexible tube 7. The flexible tube 7 has sufficient length margin to adapt to the position change of the slider 6. One end of the flexible tube 7 near the slider 6 is the liquid outlet end and the other end is the liquid inlet end. The flexible tube 7 is used to guide the flow direction of the coolant. The inlet pipe 3 is equipped with a driving component for changing the position of the slider 6. By causing the slider 6 to drive the liquid outlet end of the flexible tube 7 to perform linear reciprocating motion, the liquid outlet end of the flexible tube 7 is made to circulate close to the liquid cooling channel in the liquid cooling plate 1, thereby reducing the difference in the coolant flow content per unit time in each liquid cooling channel and improving the heat dissipation uniformity of electronic components on the surface of the liquid cooling plate.

[0024] like Figures 2-4As shown, the drive assembly includes a drive component 201, which is mounted on the liquid inlet pipe 3. The liquid inlet pipe 3 is rotatably connected to a drive shaft 202. The drive component 201 drives the drive shaft 202 to rotate. The drive component 201 can be a servo motor and is directly connected to the drive shaft 202. If space is limited, the drive component 201 can also consist of a servo motor and a transmission mechanism. The drive shaft 202 can be connected to the servo motor through the transmission mechanism. A connecting rod 203 located inside the liquid inlet pipe 3 is fixedly connected to the bottom of the drive shaft 202. The connecting rod 203 is a telescopic rod. The fixed part of the connecting rod 203 is fixedly connected to the drive shaft 202. The telescopic end of the connecting rod 203 is rotatably connected to the slider 6. In the initial state, the telescopic axis of the connecting rod 203 coincides with the coolant injection direction of the liquid cooling plate 1. The slider 6 is located in the middle of the slider 5. The connecting rod 203 is used to drive the slider 6 to reciprocate. The slider 5 is fixedly connected inside the liquid inlet pipe 3. The slider 5 is a straight rod. The sliding trajectory of the slider 6 on the slider 5 is a straight line. The straight sliding trajectory of the slider 6 on the slider 5 is parallel to the adjacent side of the liquid cooling plate 1. The liquid outlet direction of the flexible tube 7 on the slider 6 is always perpendicular to the adjacent side of the liquid cooling plate 1. This is to ensure that when the connecting rod 203 drives the slider 6 to move, the liquid outlet direction of the flexible tube 7 driven by the slider 6 is always perpendicular to the liquid cooling channel of the liquid cooling plate 1. With the cooperation of the slider 5 and the connecting rod 203, the distance between the liquid outlet of the flexible tube 7 and the liquid cooling channel inside the liquid cooling plate 4 is always kept consistent, ensuring that the coolant in the flexible tube 7 can smoothly and evenly enter the corresponding liquid cooling channel inside the liquid cooling plate 1.

[0025] Working principle: When this device is running, the coolant enters the liquid cooling channel of the liquid cooling plate 1 through the inlet pipe 3, the through hole in the middle of the connecting ring 4, and the flexible pipe 7. During this process, it absorbs the heat from the electronic components and is finally discharged through the outlet pipe 2. After circulating through the liquid cooling system, it re-enters the inlet pipe 3, thus absorbing the heat generated by the electronic components in this cycle. At the same time, the drive component 201 is activated, and the output shaft of the drive component 201 drives the drive shaft 202 to rotate back and forth. The drive shaft 202 drives the fixed part of the connecting rod 203 to swing back and forth. That is, the telescopic end of the connecting rod 203 drives the slider 6 to move synchronously, so that the slider 6 slides back and forth in a straight line along the sliding component 5. In turn, the slider 6 drives the outlet end of the flexible pipe 7 to move synchronously, continuously changing the position of the outlet end of the flexible pipe 7. This keeps the position of the outlet end of the flexible pipe 7 close to the liquid cooling channel in the liquid cooling plate 1, thereby ensuring that the coolant content flowing in each liquid cooling channel per unit time is the same, and improving the heat dissipation uniformity of the electronic components in this device.

[0026] Since the linear motion trajectory of slider 6 on sliding member 5 is parallel to the adjacent side of liquid cooling plate 1, when slider 6 drives the liquid outlet end of flexible tube 7 to reciprocate along sliding member 5, the distance from the liquid outlet end of flexible tube 7 to the liquid cooling channel in liquid cooling plate 1 is always the same. During this process, the telescopic end of connecting rod 203 slides synchronously along its fixed part, constantly changing the length of connecting rod 203, thereby realizing the sliding of slider 6 on sliding member 5. At the same time, when slider 6 drives the liquid outlet end of flexible tube 7 to move synchronously, the direction of the liquid outlet end of flexible tube 7 is always perpendicular to the liquid cooling channel of liquid cooling plate 1, ensuring that the coolant in flexible tube 7 can smoothly enter the liquid cooling channel in liquid cooling plate 1. This cycle continues until the device stops dissipating heat from electronic components, turns off drive member 201, and turns off coolant circulation. When heat dissipation is needed again, drive member 201 and coolant circulation system need to be turned on again, and the above operating steps are repeated.

[0027] Example 2 discloses a composite liquid cooling heat sink for a liquid cooling system, which is a further improvement on Example 1.

[0028] like Figures 3-5As shown, the connecting ring 4 is provided with several second channels. The number of second channels on the connecting ring 4 can be freely set according to the actual situation. The connecting ring 4 is fixedly connected to a frame, and a sealing frame 301 is slidably connected to the connecting ring 4 through the frame. The sealing frame 301 is used to seal all the second channels on the connecting ring 4. The several second channels on the connecting ring 4 are circumferentially evenly distributed to uniformly drive the flow of coolant in the inlet pipe 3. An elastic element 302 is provided between the sealing frame 301 and the connecting ring 4. The elastic element 302 is a tension spring, which is initially in an unstretched state. 02 is used to reset the sealing frame 301 and stabilize it to prevent it from sliding arbitrarily. A sealing piston 303 is fixedly connected to the sealing frame 301. The sealing piston 303 is located in the through hole in the middle of the connecting ring 4. The sealing piston 303 is used to seal the through hole in the middle of the connecting ring 4. Only one of the two states—the sealing frame 301 blocking the second channel and the sealing piston 303 blocking the through hole in the middle of the connecting ring 4—can exist at a time. This is used to periodically concentrate the coolant flow in either of the above states, improving the uniformity of heat dissipation in this device and reducing the amount of coolant entering the device. The coolant flow dead zone inside pipe 3 is blocked by a sealing bracket 301 with a push rod 304 fixedly connected to it. A fixed disk 305 is fixedly connected to the bottom of the drive shaft 202. The fixed disk 305 is located below the connecting rod 203. Two symmetrically distributed extrusion blocks 306 are fixedly connected to the fixed disk 305. In the initial state, when the slider 6 is located in the middle of the slider 5, the axis of symmetry of the two extrusion blocks 306 is parallel to the extension axis of the connecting rod 203. The extrusion blocks 306 are used to extrude the push rod 304. The shape of the extrusion block 306 is a right trapezoidal structure. The bottom of 6 is in contact with the outside of the fixed plate 305, and the opposite side of the squeezing block 306 is inclined, which is used to squeeze the push rod 304 and thus change the state of the sealing frame 301 and the sealing piston 303. When the top of the squeezing block 306 contacts the push rod 304, the push rod 304 stably pushes the sealing frame 301 to switch the flow direction of the coolant from the flexible tube 7 to several second channels. The coolant flows along several second channels, which can drive the coolant in the dead flow angle between the outlet end of the flexible tube 7 and the connecting ring 4 to flow synchronously, reducing the probability of coolant sedimentation in the dead flow angle.

[0029] Working principle: When the driving component 201 drives the fixed part of the connecting rod 203 to reciprocate through the driving shaft 202, the driving shaft 202 will drive the fixed disk 305 to rotate synchronously. The fixed disk 305 will drive the two pressing blocks 306 on it to move synchronously. Taking the clockwise rotation of the fixed disk 305 driven by the driving shaft 202 as the reference, ... Figure 2 and Figure 3The following description is based on the shown state and top view. At this moment, the contact position between the push rod 304 and the fixed plate 305 is located in the middle of the two extrusion blocks 306, that is, the extension axis of the connecting rod 203 is parallel to the central axis of the push rod 304. The drive shaft 202 rotates clockwise, causing the fixed part of the connecting rod 203 to rotate synchronously. The extension end of the connecting rod 203 causes the slider 6 to slide backward along the sliding member 5. When the drive shaft 202 drives the extrusion block 306 on the rear side to contact the push rod 304 through the fixed plate 305 and they extrude against each other, the slider 6 is facing the liquid cooling channel inlet on the last side of the liquid cooling plate 1. Then the connecting rod 203... The telescopic end of 3 drives the slider 6 to continue sliding backward along the sliding member 5, causing the push rod 304 to be squeezed and drive the sealing frame 301 to move synchronously. The sealing frame 301 releases the blockage of several second channels on the connecting ring 4. At the same time, the sealing frame 301 drives the sealing piston 303 to block the through hole in the middle of the connecting ring 4, so that the flow direction of the coolant is briefly switched from the flexible tube 7 to several second channels. When the coolant flows along several second channels, the coolant can drive the coolant on the right side of the outlet end of the flexible tube 7 into the liquid cooling channel of the liquid cooling plate 1, reducing the occurrence of coolant sedimentation in the dead flow angle between the outlet end of the flexible tube 7 and the connecting ring 4.

[0030] When the drive shaft 202 drives the slider 6 to move forward along the sliding member 5 via the connecting rod 203, the drive shaft 202 drives the pressing block 306 on the fixed plate 305 to rotate synchronously, causing the pressing block 306 on the rear side to separate from the push rod 304. At the same time, the elastic member 302 drives the sealing frame 301 to reset, causing the sealing frame 301 to block several second channels. Simultaneously, the sealing frame 301 drives the sealing piston 303 to release the through hole in the middle of the connecting ring 4, causing the flow direction of the coolant to switch from several second channels on the connecting ring 4 to the flexible tube 7. When the push rod 304 swings to contact the pressing block 306 on the front side, the above steps are repeated. This cycle continues until the device stops dissipating heat from the electronic components, the drive member 201 is turned off, and the coolant circulation is also turned off. When heat dissipation is needed again, the drive member 201 and the coolant circulation system must be turned on again, and the above operating steps must be repeated.

[0031] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A composite liquid cooling heat sink for a liquid cooling system, comprising a liquid cooling plate (1), wherein the liquid cooling plate (1) is provided with a plurality of liquid cooling channels for coolant flow, and the liquid cooling plate (1) is fixedly connected with an outlet pipe (2) and an inlet pipe (3) that are all connected to the plurality of liquid cooling channels, characterized in that, A connecting ring (4) is provided inside the liquid inlet pipe (3). The through hole in the middle of the connecting ring (4) is used for the coolant to enter the liquid cooling channel of the liquid cooling plate (1). A sliding member (5) is fixedly connected inside the liquid inlet pipe (3). A slider (6) is slidably connected to the sliding member (5). A flexible tube (7) is fixedly connected between the slider (6) and the connecting ring (4). The flexible tube (7) is used to guide the flow direction of the coolant. A driving component for changing the position of the slider (6) is provided on the liquid inlet pipe (3).

2. The composite liquid cooling heat sink for a liquid cooling system according to claim 1, characterized in that, The driving assembly includes a driving component (201), which is disposed on the liquid inlet pipe (3). The liquid inlet pipe (3) is rotatably connected to a driving shaft (202). The driving component (201) is used to drive the driving shaft (202) to rotate. The driving shaft (202) is fixedly connected to a connecting rod (203) located on the liquid inlet pipe (3). The connecting rod (203) is used to drive the slider (6) to move.

3. The composite liquid cooling heat sink for a liquid cooling system according to claim 2, characterized in that, The slider (5) is a straight rod, and the sliding trajectory of the slider (6) on the slider (5) is a straight line. The sliding trajectory of the slider (6) on the slider (5) is parallel to the adjacent side of the liquid cooling plate (1). The connecting rod (203) is a telescopic rod. The fixed part of the connecting rod (203) is fixedly connected to the drive shaft (202), and the telescopic end of the connecting rod (203) is rotatably connected to the slider (6).

4. A composite liquid cooling heat sink for a liquid cooling system according to claim 3, characterized in that, The liquid outlet direction of the flexible tube (7) on the slider (6) is always perpendicular to the side adjacent to the liquid cooling plate (1).

5. A composite liquid cooling heat sink for a liquid cooling system according to claim 4, characterized in that, The connecting ring (4) is provided with a number of second channels, and all the second channels on the connecting ring (4) are connected together by a sealing frame (301) in a sealed sliding connection.

6. A composite liquid cooling heat sink for a liquid cooling system according to claim 5, characterized in that, The connecting ring (4) has several second channels that are circumferentially spaced and are used to uniformly drive the flow of coolant in the inlet pipe (3).

7. A composite liquid cooling heat sink for a liquid cooling system according to claim 6, characterized in that, An elastic element (302) is provided between the sealing frame (301) and the connecting ring (4), and the elastic element (302) is used to drive the sealing frame (301) to reset.

8. A composite liquid cooling heat sink for a liquid cooling system according to claim 7, characterized in that, The sealing frame (301) is fixedly connected to a sealing piston (303), which is used to seal the through hole in the middle of the connecting ring (4).

9. A composite liquid cooling heat sink for a liquid cooling system according to claim 8, characterized in that, The sealing frame (301) is fixedly connected to a push rod (304), the drive shaft (202) is fixedly connected to a fixed disk (305), the fixed disk (305) is fixedly connected to two symmetrically distributed extrusion blocks (306), and the extrusion blocks (306) are used to extrude and push the push rod (304).

10. A composite liquid cooling heat sink for a liquid cooling system according to claim 9, characterized in that, The extrusion block (306) is a right-angled trapezoidal structure. The bottom of the extrusion block (306) is attached to the outside of the fixed plate (305), and the opposing sides of the two extrusion blocks (306) are sloping waists.

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