Spraying type boiling composite liquid cooling plate

Abstract

The invention provides a spraying type boiling composite liquid cooling plate which enables cooling liquid to be quickly sprayed to a boiling core to complete vaporization and heat exchange, so that the heat dissipation efficiency is improved, and the heat dissipation requirement of a CPU (Central Processing Unit) is met. The upper cover part comprises an upper cover plate, a peripheral surrounding plate, a liquid inlet and a liquid outlet, a first inclined surface inclining from top to bottom is arranged on the lower surface, corresponding to the liquid inlet, of the upper cover plate, the end, facing the liquid inlet, of the first inclined surface is a high-position and middle-layer separation part, the upper-layer separation part comprises an upper-layer separation plate and a peripheral lower surrounding plate, the upper-layer separation plate is a porous plate, and the peripheral lower surrounding plate is a porous plate; a plurality of supercharged oblique injection holes are distributed in the area, corresponding to the first inclined plane, of the upper-layer partition plate, the upper portions of the supercharged oblique injection holes are large-aperture feeding holes, the lower portions of the supercharged oblique injection holes are small-aperture discharging holes, and runners are obliquely-distributed channels; the bottom plate part comprises a bottom plate, a heat source contact area is arranged on the lower surface of the bottom plate, and an inner groove is formed in the position, corresponding to the heat source contact area, of the upper surface of the bottom plate; a boiling core; and the two water nozzles comprise a liquid inlet water nozzle and a liquid outlet water nozzle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic equipment cooling structure, and particularly to a spray type boiling composite liquid cooling plate. BACKGROUND

[0002] With the rapid development of computer technology, the performance of CPU (Central Processing Unit) is continuously improved. The performance improvement of CPU mainly reflects in higher clock frequency and more core number. For example, the early CPU may have only a single core and a lower clock frequency, such as the early products of Intel Pentium series, the main frequency may be in the hundreds of megahertz. However, nowadays, high-performance CPUs have dozens of cores, and the main frequency can reach 5GHz or even higher. The performance improvement makes the heat generated by the CPU greatly increase when working.

[0003] The existing air cooling heat dissipation method mainly relies on heat sinks and fans. The heat sink is usually made of metal (such as aluminum or copper), which utilizes the good thermal conductivity of metal to conduct the heat generated by the CPU to the heat sink. The fan accelerates the air flow to take away the heat on the heat sink. With the continuous increase of CPU power consumption, the efficiency of air cooling heat dissipation gradually cannot meet the demand. In many application scenarios, such as server rooms, data centers, etc., computer equipment needs to be operated stably for a long time. For servers, they have to handle a large amount of data and service requests, and any equipment failure caused by overheating may cause serious consequences, such as data loss, service interruption, etc. In order to ensure the stability and reliability of electronic equipment, more efficient heat dissipation technology is needed. CPU liquid cooling technology emerges as the times require, which can provide a more efficient heat dissipation solution than air cooling, ensuring that the CPU can maintain a suitable temperature in a high-load working environment, thereby improving the stability and reliability of the entire computer system.

[0004] However, how to cool the CPU faster and better, the existing technology only passes the cooling liquid through the heat exchange surface of the heat exchange area, which cannot meet the heat dissipation demand of high-frequency CPU; therefore, it is urgent to develop a liquid cooling plate with higher heat dissipation efficiency to meet the heat dissipation demand of CPU. SUMMARY

[0005] In view of the above problems, the present application provides a spray type boiling composite liquid cooling plate, which makes the cooling liquid quickly spray onto the boiling core to complete vaporization and exchange heat, so as to improve the heat dissipation efficiency and meet the heat dissipation demand of CPU.

[0006] A spray type boiling composite liquid cooling plate, characterized in that it comprises: an upper cover part comprising an upper cover plate, a peripheral plate, a liquid inlet, and a liquid outlet, wherein the lower surface of the upper cover plate corresponding to the liquid inlet is provided with a first inclined surface inclined from top to bottom, and the end of the first inclined surface facing the liquid inlet is high. The middle layer separation part includes an upper layer partition plate and a peripheral lower plate, the upper layer partition plate is a porous plate, and the upper layer partition plate is arranged with a plurality of pressurized oblique holes corresponding to the surface area of the first inclined surface, the upper part of the pressurized oblique hole is a large-diameter inlet hole, the lower part is a small-diameter outlet hole, and the flow channel is an oblique passage; The bottom plate part includes a bottom plate, the lower surface of the bottom plate is provided with a heat source contact area, and the upper surface of the bottom plate is provided with an inner recess corresponding to the heat source contact area; The boiling core; And two water nozzles including an inlet water nozzle and an outlet water nozzle; The lower part of the peripheral plate of the upper cover part and the upper part of the peripheral lower plate are matched to complete assembly, the bottom of the peripheral lower plate is covered on the upper surface of the bottom plate, the upper cover part is covered on the upper part of the middle layer separation part to form an inlet pressurized cavity and an outlet cavity, the middle layer separation part is covered on the upper part of the bottom plate part to form a heat exchange cavity, and the heat exchange cavity covers the surface area of the boiling core.

[0007] Further characterized in that: The inlet and outlet are respectively arranged at the two end positions of the length direction of the upper cover part, the inlet is provided with an inlet water nozzle, the outlet is provided with an outlet water nozzle, the upper cover plate is a second inclined surface from bottom to top along the length direction of the upper cover plate corresponding to the lower surface of the outlet cavity, a barrier is arranged between the first inclined surface and the second inclined surface, and the lower part of the barrier is in close contact with the upper surface of the upper layer partition plate; The inlet pressurized cavity and the outlet cavity are symmetrical cavities about the barrier, and the first inclined surface and the second inclined surface are symmetrically arranged about the barrier, so that the inlet and the outlet can be replaced and work, and the direction is not limited; The upper surface of the upper cover part is a guide inclined surface which is obliquely arranged towards the length direction of the two ends of the center, and the first inclined surface and the guide inclined surface corresponding to the inlet pressurized cavity are combined to form a pressurized structure which is gradually closed from the inlet to the area away from the inlet; The upper layer partition plate is not provided with holes corresponding to the position of the barrier, which ensures that the barrier is arranged to isolate the inlet pressurized cavity and the outlet cavity; The inlet position of the pressurized oblique hole includes a chamfer which is inwardly closed in the height direction; The pressurized oblique hole is provided with a spiral flow guide piece, and the spiral flow guide piece further increases the flow rate of the liquid; The upper cover plate corresponding to the outlet cavity is also provided with a pressurized oblique hole, the pressurized oblique holes of the upper cover plate corresponding to the inlet pressurized cavity and the outlet cavity are symmetrically arranged, and the pressurized oblique hole corresponding to the inlet pressurized cavity is inclinedly arranged with the inlet port deviated towards the center; The boiling core is sintered by a porous structure material, thereby increasing the boiling surface and accelerating heat dissipation.

[0008] After the technology of the application is adopted, the bottom plate contacts with the heat source, absorbs heat quickly, and conducts to the boiling core, under the driving of the pump, the low-temperature liquid enters from the liquid inlet nozzle, flows into the inclined liquid inlet plenum, ensures effective liquid filling of the cavity, then enters the heat exchange cavity through the pressurized inclined injection hole of the upper partition, contacts the boiling core, and vaporizes rapidly to form bubbles when the low-temperature liquid contacts the boiling core, the coexistence of liquid and bubbles is formed in the space of the heat exchange cavity, the heat dissipation of the boiling core is accelerated, the bubbles break and release heat during the rising process, the liquid absorbing heat passes through another part of the through hole of the upper partition, passes through the liquid outlet cavity, and then is output from the liquid outlet nozzle, so as to transfer heat to the environment with lower temperature at the far end to release heat, and the work is repeated; the cooling liquid is sprayed on the boiling core to complete vaporization and exchange heat, the heat dissipation efficiency is improved, and the heat dissipation requirement of the CPU is met. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 Fig. 1 is a top view structural schematic diagram of the application; Figure 2 Fig. 2 is an A-A cross-sectional structural schematic diagram of the application; Figure 1 Fig. 3 is a partial enlarged structural schematic diagram of the application; Figure 3 Fig. 4 is a three-dimensional schematic diagram of the spiral guide vane suitable for the application; Figure 2 Figure 4 Fig. 5 is a three-dimensional schematic diagram of the spiral guide vane suitable for the application; The names corresponding to the serial numbers in the figure are as follows: upper cover part 10, upper cover plate 11, four surrounding plates 12, liquid inlet 13, liquid outlet 14, first inclined surface 15, second inclined surface 16, barrier 17, middle layer separation part 20, upper layer partition 21, four surrounding lower plates 22, upper stopper 221, pressurized inclined injection hole 23, large-diameter feeding hole 231, small-diameter discharging hole 232, guide inclined surface 24, bottom plate part 30, bottom plate 31, heat source contact area 32, inner groove 33, boiling core 40, liquid inlet nozzle 50, liquid outlet nozzle 60, liquid inlet plenum 70, liquid outlet cavity 80, heat exchange cavity 90, spiral guide vane 100, heat source 110. DETAILED DESCRIPTION

[0010] A spray type boiling composite liquid cooling plate, as shown in Figures 1-4 Fig. 1, which comprises an upper cover part 10, a middle layer separation part 20, a bottom plate part 30, a boiling core 40, and two nozzles. ​The upper cover part 10 comprises an upper cover plate 11, a peripheral wall 12, a liquid inlet 13, and a liquid outlet 14. The lower surface of the upper cover plate 11 corresponding to the liquid inlet 13 is provided with a first inclined surface 15 inclined from top to bottom. The end of the first inclined surface 15 towards the liquid inlet 13 is at a high position. The middle layer separation part 20 comprises an upper layer separation plate 21 and a lower peripheral wall 22. The upper layer separation plate 21 is a porous plate. The upper layer separation plate 21 is provided with a plurality of pressurized inclined holes 23 corresponding to the surface area of the first inclined surface 15. The upper part of the pressurized inclined hole 23 is a large-diameter inlet hole 231, and the lower part is a small-diameter outlet hole 232. The flow channel is an inclined passage. The bottom plate part 30 comprises a bottom plate 31. The lower surface of the bottom plate 31 is provided with a heat source contact area 32. The upper surface of the bottom plate 31 corresponding to the heat source contact area is provided with an inner recess 33. The boiling core 40 is sintered in a porous structure to increase the boiling surface and accelerate heat dissipation. The two water nozzles comprise a liquid inlet water nozzle 50 and a liquid outlet water nozzle 60. The lower part of the peripheral wall 12 of the upper cover part 10 and the upper part of the lower peripheral wall 22 cooperate to complete the assembly. The bottom of the lower peripheral wall 22 is covered on the upper surface of the bottom plate 31. The upper cover part 10 is covered on the upper part of the middle layer separation part 20 to form a liquid inlet pressurized chamber 70 and a liquid outlet chamber 80. The middle layer separation part 20 is covered on the upper part of the bottom plate part 30 to form a heat exchange chamber 90 covering the surface area of the boiling core 40.

[0011] In specific implementation, the liquid inlet 13 and the liquid outlet 14 are respectively arranged at the two end positions of the length direction of the upper cover part 10. The liquid inlet 13 is provided with the liquid inlet water nozzle 50, and the liquid outlet 14 is provided with the liquid outlet water nozzle 60. The lower surface of the upper cover plate 11 corresponding to the liquid outlet chamber 80 is a second inclined surface 16 inclined from bottom to top along the length direction of the upper cover plate. The first inclined surface 15 and the second inclined surface 16 are provided with a barrier 17. The lower part of the barrier 17 is tightly attached to the upper surface of the upper layer separation plate 21. The liquid inlet pressurized chamber 70 and the liquid outlet chamber 80 are chamber bodies symmetrically arranged about the barrier 17. The first inclined surface 15 and the second inclined surface 16 are symmetrically arranged about the barrier 17, which enables the liquid inlet and the liquid outlet to be alternatively operated and enables the direction to be unrestricted. The upper surface of the upper cover part 21 is provided with a guide inclined surface 24 inclined towards the length direction of the two ends. The first inclined surface 15 corresponding to the liquid inlet pressurized chamber 70 and the guide inclined surface 24 are combined to form a pressurized structure gradually narrowing from the liquid inlet 13 to the area away from the liquid inlet 13. The liquid outlet chamber 80 is a chamber body symmetrically arranged about the barrier 17 and the liquid inlet pressurized chamber 70, which enables the liquid pressure entering the liquid inlet pressurized chamber 70 to maintain a relatively large delivery range and ensures that the pressurized inclined holes 23 corresponding to the surface area of the liquid inlet pressurized chamber 70 are all in a spray type liquid outlet state. The upper layer partition 21 is not provided with holes corresponding to the positions of the barriers 17, which ensures that the barriers 17 isolate the liquid inlet plenum 70 and the liquid outlet cavity 80; The inlet position of the pressurized oblique hole 23 comprises a chamfer with a height direction inwardly converging, which ensures that the cooling liquid enters from the large hole and flows out from the small hole, increases the back pressure and improves the flow rate; The pressurized oblique hole 23 is provided with a spiral flow guide 100, which further increases the flow rate of the liquid; The upper cover plate 21 corresponding to the liquid outlet cavity 80 is also provided with a pressurized oblique hole 23, the pressurized oblique holes 23 of the upper cover plate 21 corresponding to the liquid inlet plenum 70 and the liquid outlet cavity 80 are symmetrically arranged, and the pressurized oblique hole 23 corresponding to the liquid inlet plenum 70 is inclined to the center of the liquid inlet 13.

[0012] The assembly process is as follows: the upper cover part 10, the middle layer separation part 20, the bottom plate part 30, and the boiling core 40 are pre-embedded in the inner recess 33 of the bottom plate 31, the liquid inlet nozzle 50 and the liquid outlet nozzle 60 are pre-fixed to the corresponding positions of the upper cover part 10, then the upper cover part 10 is stacked on the middle layer separation part 20 and reliably sealed and connected at the stop position, the lower part of the middle layer separation part 20 is stacked on the corresponding child port of the bottom plate part 30 and reliably sealed and connected at the positioning stop, and the assembly is quickly completed.

[0013] The working principle is as follows: the bottom plate 31 is in contact with the heat source 110, quickly absorbs heat, and conducts to the boiling core 40, under the drive of the pump, the low-temperature liquid enters from the liquid inlet nozzle 50, flows into the inclined liquid inlet plenum 70, ensures effective liquid filling of the cavity, then enters the heat exchange cavity 90 through the pressurized oblique hole 23 of the upper layer partition 21, contacts the boiling core 40, and rapidly vaporizes to form bubbles when the low-temperature liquid contacts the boiling core 40, forms coexistence of liquid and bubbles in the space of the heat exchange cavity 90, accelerates heat dissipation of the boiling core 40, the bubbles break and release heat during the rising process, the liquid absorbing heat passes through another part of the through hole of the upper layer partition 21 and then passes through the liquid outlet cavity 80 and is output from the liquid outlet nozzle 60, thereby transferring heat to the environment with lower temperature at the far end to release heat, and the work is repeated; which makes the cooling liquid quickly spray on the boiling core to complete vaporization, exchange heat, improves the heat dissipation efficiency, and meets the heat dissipation demand of the CPU.

[0014] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the identity of the reference signs therein.

[0015] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A spray boiling hybrid liquid cold plate, characterized by, It comprises: an upper cover part comprising an upper cover plate, a peripheral plate, a liquid inlet, and a liquid outlet, the lower surface of the upper cover plate corresponding to the liquid inlet is provided with a first inclined surface inclined from top to bottom, the end of the first inclined surface towards the liquid inlet is high, a middle layer separation part comprising an upper layer separation plate and a lower peripheral plate, the upper layer separation plate is a porous plate, the upper layer separation plate is provided with a plurality of booster inclined holes corresponding to the surface area of the first inclined surface, the upper part of the booster inclined hole is a large-diameter feeding hole, the lower part is a small-diameter discharging hole, and the flow channel is an inclined passage; a bottom plate part comprising a bottom plate, the lower surface of the bottom plate is provided with a heat source contact area, and the upper surface of the bottom plate is provided with an inner groove corresponding to the heat source contact area; a boiling core; and two water nozzles comprising a liquid inlet nozzle and a liquid outlet nozzle; the lower part of the peripheral plate of the upper cover part and the upper part of the lower peripheral plate are matched to complete assembly, the bottom of the lower peripheral plate is covered on the upper surface of the bottom plate, the upper cover part is covered on the upper part of the middle layer separation part to form a liquid inlet booster cavity and a liquid outlet cavity, the middle layer separation part is covered on the upper part of the bottom plate part to form a heat exchange cavity, and the heat exchange cavity covers the surface area of the boiling core.

2. The spray boiling hybrid liquid cold plate of claim 1, wherein: The liquid inlet and the liquid outlet are respectively arranged at the two end positions of the length direction of the upper cover part, the liquid inlet nozzle is installed on the liquid inlet, the liquid outlet nozzle is installed on the liquid outlet, the lower surface of the upper cover plate corresponding to the liquid outlet cavity is a second inclined surface from bottom to top along the length direction of the upper cover plate, and a barrier is arranged between the first inclined surface and the second inclined surface, and the lower part of the barrier is in close contact with the upper surface of the upper layer separation plate.

3. The spray boiling hybrid liquid cold plate of claim 2, wherein: The liquid inlet booster cavity and the liquid outlet cavity are cavity bodies arranged symmetrically about the barrier, and the first inclined surface and the second inclined surface are arranged symmetrically about the barrier.

4. The spray boiling hybrid liquid cold plate of claim 3, wherein: The upper surface of the upper cover part is provided with a guide inclined surface inclined upward towards the two ends of the length direction, and the first inclined surface and the guide inclined surface corresponding to the liquid inlet booster cavity are combined to form a booster structure gradually narrowing from the liquid inlet to the area away from the liquid inlet.

5. The spray boiling hybrid liquid cold plate of claim 2, wherein: The upper layer separation plate does not have holes corresponding to the position of the barrier.

6. The spray boiling hybrid liquid cold plate of claim 1, wherein: The inlet position of the booster inclined hole comprises a chamfer inwardly narrowing in the height direction.

7. The spray boiling hybrid liquid cold plate of claim 1, wherein: The booster inclined hole is provided with a spiral flow guide piece.

8. The spray boiling hybrid liquid cold plate of claim 1, wherein: The upper cover plate corresponding to the liquid outlet cavity is also provided with a booster inclined hole, the booster inclined holes of the upper cover plates corresponding to the liquid inlet booster cavity and the liquid outlet cavity are symmetrically arranged, and the booster inclined hole corresponding to the liquid inlet booster cavity is inclined towards the center.

9. The spray boiling hybrid liquid cold plate of claim 1, wherein: The boiling core is sintered by a porous structure material.

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