An asymmetrically arranged wave-shaped microchannel cold plate

Abstract

The utility model relates to the field of micro -channel cold plate especially relates to a wave shape micro -channel cold plate of asymmetric arrangement, including the sealing plate, the upper end fixed mounting of sealing plate has the upper base plate, the inside of upper base plate is provided with upper micro -channel, water inlet cavity and upper backwater chamber, is provided with wave baffle no.

Description

Technical Field

[0001] This utility model relates to the field of microchannel cold plates, and more particularly to an asymmetrically arranged wavy microchannel cold plate. Background Technology

[0002] Microchannel cold plates are a type of high-efficiency heat dissipation device. Through their internal fluid channel structure, they utilize the rapid heat exchange capacity of liquid working fluid to achieve precise temperature control for high heat flux density devices such as electronic components. Their core advantages lie in their compact structure, high heat exchange efficiency, and good temperature uniformity. After the coolant enters from the inlet, it is distributed to the symmetrical microchannel fin area through a throttling structure and finally discharged through the outlet buffer chamber. In this process, heat is transferred efficiently. When the liquid working fluid flows in the microchannel, it directly contacts the heat source and rapidly removes heat through forced convection and phase change boiling.

[0003] For example, patent number (CN219698287U) discloses a petal-shaped needle-rib microchannel cold plate, including a cold plate substrate, a cover plate, an input pipe, and an output pipe. One side of the cold plate substrate has a water groove, and each of the four corners of the cold plate substrate has a cold plate bolt hole. The cover plate also has a cover plate bolt hole at each of its four corners. The side of the cold plate substrate with the water groove is fixed to the cover plate with bolts. The cover plate has a through-hole flow channel inlet and outlet, located at the lower left and upper right corners of the cover plate, respectively. The inlet of the input pipe is fixed to the flow channel inlet of the cover plate, and the outlet of the output pipe is fixed to the flow channel outlet of the cover plate. Several microchannel units are arranged within the water groove of the cold plate substrate. Each microchannel unit is a columnar protrusion, and one end of each microchannel unit is fixed to the cold plate substrate. This invention solves the problem of uneven temperature during heat dissipation in high heat flux density electronic devices.

[0004] Currently, when microchannel cold plates are in operation, due to certain limitations in the structure of the microchannels, dead zones may occur in the flow, and the coolant may have a short residence time inside the microchannels, which is not conducive to improving the heat dissipation efficiency of the microchannel cold plate.

[0005] Therefore, to address the above problems, an asymmetrically arranged wave-shaped microchannel cold plate can be designed to improve heat dissipation efficiency. Utility Model Content

[0006] To overcome the problem that microchannel cold plates may have dead zones during operation and that the coolant may have a short residence time inside the microchannels, thus affecting the heat dissipation efficiency of the microchannel cold plate.

[0007] The technical solution of this utility model is as follows: an asymmetrically arranged corrugated microchannel cold plate, including a sealing plate, an upper substrate fixedly mounted on the upper end of the sealing plate, an upper microchannel, an inlet chamber, and an upper return chamber disposed inside the upper substrate, a corrugated baffle plate I disposed between the upper microchannel and the inlet chamber, a longitudinal corrugated fin I disposed inside the upper microchannel, and transverse corrugated fins I disposed on both the left and right sides of the longitudinal corrugated fin I disposed inside the upper microchannel, a corrugated baffle plate II disposed between the upper return chamber and the upper microchannel, and a lower substrate fixedly mounted on the lower end of the sealing plate, the lower substrate being provided with a lower microchannel. The system includes a channel, an outlet chamber, and a lower return chamber. A connecting hole is provided on the inner side of the sealing plate between the upper and lower return chambers. A corrugated baffle three is provided between the lower return chamber and the lower microchannel. A longitudinal corrugated fin two is provided inside the lower microchannel. Transverse corrugated fin two is provided on both the left and right sides of the longitudinal corrugated fin two inside the lower microchannel. A straight baffle is provided between the lower microchannel and the outlet chamber. Through grooves are provided on the inner sides of the corrugated baffle one, corrugated baffle two, corrugated baffle three, and straight baffle. An inlet pipe is fixedly connected to the right side of the upper base plate, and an outlet pipe is fixedly connected to the right side of the lower base plate.

[0008] Preferably, the inlet pipe can input cooling liquid into the inlet chamber, the through groove of the first corrugated baffle can disperse the cooling liquid into the upward microchannel, the first longitudinal corrugated fin and the first transverse corrugated fin can guide and disperse the cooling liquid, the through groove of the second corrugated baffle can concentrate the cooling liquid into the upper return water chamber again, the connecting hole can connect the upper return water chamber and the lower return water chamber, the through groove of the third corrugated baffle can disperse the cooling liquid into the downward microchannel, the second longitudinal corrugated fin and the second transverse corrugated fin can guide and disperse the cooling liquid, optimize the flow path of the fluid, and the cooling liquid can be collected from the through groove of the straight baffle into the outlet chamber and discharged from the outlet pipe.

[0009] Preferably, one end of the first and second corrugated baffles is fixedly connected to the upper substrate, and the other end of the first and second corrugated baffles is fixedly connected to the sealing plate.

[0010] Preferably, one end of the longitudinal wave fin and the transverse wave fin are fixedly connected to the upper substrate, and the other end of the longitudinal wave fin and the transverse wave fin are fixedly connected to the sealing plate.

[0011] Preferably, the connecting holes are evenly spaced and the through slots are evenly spaced.

[0012] Preferably, one end of the three corrugated partitions and the straight partitions is fixedly connected to the lower substrate, and the other end of the three corrugated partitions and the straight partitions is fixedly connected to the sealing plate.

[0013] Preferably, one end of the second longitudinal wave fin and the second transverse wave fin are fixedly connected to the lower substrate, and the other end of the second longitudinal wave fin and the second transverse wave fin are fixedly connected to the sealing plate.

[0014] Preferably, the liquid inlet pipe is connected to the water inlet chamber, and the liquid outlet pipe is connected to the water outlet chamber.

[0015] The beneficial effects of this utility model are:

[0016] 1. This asymmetrically arranged corrugated microchannel cold plate has a corrugated and asymmetrically arranged flow channel. This design gives the cold plate unique advantages in heat dissipation performance and fluid dynamics characteristics. The flow channel design of the asymmetrically arranged corrugated microchannel cold plate allows the fluid to better utilize the turbulence effect during flow. The corrugated flow channel design can increase fluid disturbance and reduce flow dead zones. At the same time, the crisscrossing corrugated fin structure and baffle structure work together to increase the residence time of the cooling liquid inside the microchannel. The asymmetrical arrangement design can further optimize the fluid flow path and ensure that heat can be distributed and transferred more evenly, thereby improving the heat dissipation effect.

[0017] 2. This asymmetrically arranged corrugated microchannel cold plate connects the upper and lower substrates via sealing plates, and connects the upper and lower return water chambers via connecting holes, facilitating the formation of a microchannel double-sided cold plate. Both sides of the cold plate are in contact with the heat source, increasing the contact area by nearly double compared to a single-sided cold plate, significantly improving heat transfer efficiency and reducing interfacial thermal resistance. The cooling medium flows bidirectionally within the dual channels, forming a counter-current heat exchange mode, effectively balancing the temperature distribution on the cold plate surface. The centrifugal force generated at the bends of the corrugated microchannels enhances fluid mixing and heat transfer performance. Through structural innovation, the microchannel double-sided cold plate significantly improves heat dissipation performance and system adaptability. Attached Figure Description

[0018] Figure 1 The diagram shown is a schematic representation of the overall structure of the asymmetrically arranged wave-shaped microchannel cold plate of this utility model.

[0019] Figure 2 The diagram shows the substrate structure of the asymmetrically arranged wavy microchannel cold plate of this utility model.

[0020] Figure 3 The diagram shown is a schematic representation of the asymmetrical arrangement of the wave-shaped microchannel cold plate under the substrate of this utility model.

[0021] Figure 4 The diagram shown illustrates the cross-sectional structure of the asymmetrically arranged wave-shaped microchannel cold plate of this invention. Figure 1 ;

[0022] Figure 5 The diagram shown illustrates the cross-sectional structure of the asymmetrically arranged wave-shaped microchannel cold plate of this invention. Figure 2 .

[0023] Explanation of reference numerals in the attached drawings: 1. Sealing plate; 2. Upper substrate; 3. Corrugated baffle one; 4. Longitudinal corrugated fin one; 5. Transverse corrugated fin one; 6. Corrugated baffle two; 7. Corrugated baffle three; 8. Longitudinal corrugated fin two; 9. Transverse corrugated fin two; 10. Straight baffle; 11. Through slot; 12. Lower substrate; 13. Connecting hole; 14. Liquid inlet pipe; 15. Liquid outlet pipe. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Please see Figures 1-5 This utility model provides an embodiment: an asymmetrically arranged corrugated microchannel cold plate, including a sealing plate 1, an upper substrate 2 fixedly mounted on the upper end of the sealing plate 1, an upper microchannel, an inlet chamber, and an upper return chamber disposed inside the upper substrate 2, a corrugated baffle 3 disposed between the upper microchannel and the inlet chamber, longitudinal corrugated fins 4 disposed inside the upper microchannel, transverse corrugated fins 5 disposed on both sides of the longitudinal corrugated fins 4 inside the upper microchannel, a corrugated baffle 6 disposed between the upper return chamber and the upper microchannel, a lower substrate 12 fixedly mounted on the lower end of the sealing plate 1, a lower microchannel, an outlet chamber, and a lower return chamber disposed inside the lower substrate 12, a connecting hole 13 opened on the inner side of the sealing plate 1 between the upper return chamber and the lower return chamber, a corrugated baffle 7 disposed between the lower return chamber and the lower microchannel, and the lower microchannel... The interior is equipped with longitudinal wave fins 2 8. The interior of the lower microchannel is equipped with transverse wave fins 2 9 on both the left and right sides of the longitudinal wave fins 2 8. A straight baffle 10 is provided between the lower microchannel and the water outlet chamber. The inner sides of the wave baffles 1 3, 2 6, 3 7 and the straight baffle 10 are all provided with through grooves 11. The upper right side of the upper base plate 2 is fixedly connected to the liquid inlet pipe 14, and the lower right side of the lower base plate 12 is fixedly connected to the liquid outlet pipe 15. The flow channel is wave-shaped and asymmetrically arranged, which allows the fluid to better utilize the turbulence effect during the flow process. The wave-shaped flow channel design can increase the turbulence of the fluid and reduce the dead angle of the flow. At the same time, the interlaced wave fin structure and the baffle structure work together to increase the residence time of the cooling liquid in the microchannel, ensuring that the heat can be distributed and transferred more evenly.

[0026] Please see Figures 1-3In this embodiment, one end of the first corrugated baffle 3 and the second corrugated baffle 6 are fixedly connected to the upper substrate 2, and the other end of the first corrugated baffle 3 and the second corrugated baffle 6 are fixedly connected to the sealing plate 1. One end of the first longitudinal corrugated fin 4 and the first transverse corrugated fin 5 are fixedly connected to the upper substrate 2, and the other end of the first longitudinal corrugated fin 4 and the first transverse corrugated fin 5 are fixedly connected to the sealing plate 1. The connecting holes 13 are evenly distributed, and the through slots 11 are evenly distributed. Cooling liquid can be discharged into the interior of the water inlet chamber through the liquid inlet pipe 14 (the liquid inlet pipe 14 can be connected to the water inlet chamber). The coolant modules are connected together to complete the cooling work. The through groove 11 of the corrugated baffle 3 can drain the coolant into the interior of the upper microchannel. The longitudinal corrugated fins 4 and the transverse corrugated fins 5 can guide and disperse the coolant (gap is provided between the corrugated fin structures to facilitate the smooth flow of coolant). The through groove 11 of the corrugated baffle 6 can concentrate the coolant in the upper return water cavity again. The crisscrossing corrugated fin structure and the baffle structure work together to increase the residence time of the coolant in the microchannel.

[0027] Please see Figures 1-5 In this embodiment, one end of the corrugated baffle 7 and the straight baffle 10 is fixedly connected to the lower substrate 12, and the other end of the corrugated baffle 7 and the straight baffle 10 is fixedly connected to the sealing plate 1. One end of the longitudinal corrugated fin 8 and the transverse corrugated fin 9 is fixedly connected to the lower substrate 12, and the other end of the longitudinal corrugated fin 8 and the transverse corrugated fin 9 is fixedly connected to the sealing plate 1. The liquid inlet pipe 14 is connected to the water inlet chamber, and the liquid outlet pipe 15 is connected to the water outlet chamber. The connecting hole 13 can connect the upper return water chamber and the lower return water chamber, and the cooling liquid can flow from the corrugated baffle 7. The coolant enters the lower microchannel through the through groove 11 of the partition 3 7. The longitudinal wave fin 2 8 and the transverse wave fin 2 9 can guide and disperse the coolant (gap is provided between the wave fin structures to facilitate the smooth flow of coolant), optimize the flow path of the fluid, reduce dead zones, increase the residence time of the coolant in the microchannel, and improve the heat dissipation effect. Finally, the coolant is collected from the through groove 11 of the straight partition 10 into the water outlet chamber and discharged through the liquid outlet pipe 15 (the liquid outlet pipe 15 can be connected with the matching coolant module to complete the cooling work).

[0028] During operation, the coolant is discharged into the inlet chamber through the inlet pipe 14, and then into the upper microchannel through the through-slot 11 of the corrugated baffle 3. The longitudinal corrugated fins 4 and lateral corrugated fins 5 guide and disperse the coolant, and the coolant is then concentrated in the upper return water chamber through the through-slot 11 of the corrugated baffle 6. Since a connecting hole 13 is provided between the upper and lower return water chambers, the coolant can easily enter the lower microchannel from the through-slot 11 of the corrugated baffle 7. At the same time, the longitudinal corrugated fins 8 and lateral corrugated fins 9 guide and disperse the coolant, optimize the flow path of the fluid, reduce dead zones, increase the residence time of the coolant in the microchannel, and improve the heat dissipation effect. Finally, the coolant is collected in the outlet chamber from the through-slot 11 of the straight baffle 10 and discharged through the outlet pipe 15.

[0029] Through the above steps, the flow channels are arranged in a wave-like and asymmetrical pattern, which allows the fluid to better utilize the turbulence effect during flow. The wave-like flow channel design can increase fluid disturbance and reduce flow dead zones. At the same time, the crisscrossing wave fin structure and baffle structure work together to increase the residence time of the coolant inside the microchannel, ensuring that heat can be distributed and transferred more evenly. This solves the problem that flow dead zones may occur during the operation of microchannel cold plates, and the coolant residence time inside the microchannel is often short, which affects the heat dissipation efficiency of the microchannel cold plate.

Claims

1. An asymmetrically arranged corrugated microchannel cold plate, comprising a sealing plate (1), characterized in that: An upper substrate (2) is fixedly installed at the upper end of the sealing plate (1). The upper substrate (2) is provided with an upper microchannel, an inlet chamber, and an upper return chamber. A wave baffle (3) is provided between the upper microchannel and the inlet chamber. A longitudinal wave fin (4) is provided inside the upper microchannel. A transverse wave fin (5) is provided on both the left and right sides of the longitudinal wave fin (4) inside the upper microchannel. A wave baffle (6) is provided between the upper return chamber and the upper microchannel. A lower substrate (12) is fixedly installed at the lower end of the sealing plate (1). The lower substrate (12) is provided with a lower microchannel, an outlet chamber, and a lower return chamber inside the lower substrate (12). The inner side of the sealing plate (1) is located between the upper return chamber and the lower return chamber. A connecting hole (13) is provided between the water chambers. A three-wave baffle (7) is provided between the lower return water chamber and the lower microchannel. A two-longitudinal wave fin (8) is provided inside the lower microchannel. A two-transverse wave fin (9) is provided on both the left and right sides of the two-longitudinal wave fin (8) inside the lower microchannel. A straight baffle (10) is provided between the lower microchannel and the water outlet chamber. A through groove (11) is provided on the inner side of the one-wave baffle (3), the two-wave baffle (6), the three-wave baffle (7) and the straight baffle (10). An inlet pipe (14) is fixedly connected to the right side of the upper base plate (2). An outlet pipe (15) is fixedly connected to the right side of the lower base plate (12).

2. The asymmetrically arranged corrugated microchannel cold plate according to claim 1, characterized in that: One end of wave partition 1 (3) and wave partition 2 (6) is fixedly connected to the upper substrate (2), and the other end of wave partition 1 (3) and wave partition 2 (6) is fixedly connected to the sealing plate (1).

3. The asymmetrically arranged corrugated microchannel cold plate according to claim 2, characterized in that: One end of the longitudinal wave fin (4) and the transverse wave fin (5) are fixedly connected to the upper substrate (2), and the other end of the longitudinal wave fin (4) and the transverse wave fin (5) are fixedly connected to the sealing plate (1).

4. The asymmetrically arranged corrugated microchannel cold plate according to claim 1, characterized in that: The connecting holes (13) are evenly spaced, and the through slots (11) are evenly spaced.

5. The asymmetrically arranged corrugated microchannel cold plate according to claim 1, characterized in that: One end of the three corrugated baffles (7) and the straight baffles (10) is fixedly connected to the lower substrate (12), and the other end of the three corrugated baffles (7) and the straight baffles (10) is fixedly connected to the sealing plate (1).

6. The asymmetrically arranged corrugated microchannel cold plate according to claim 5, characterized in that: One end of the longitudinal wave fin (8) and the transverse wave fin (9) are fixedly connected to the lower substrate (12), and the other end of the longitudinal wave fin (8) and the transverse wave fin (9) are fixedly connected to the sealing plate (1).

7. The asymmetrically arranged corrugated microchannel cold plate according to claim 1, characterized in that: The liquid inlet pipe (14) is connected to the water inlet chamber, and the liquid outlet pipe (15) is connected to the water outlet chamber.

Images