Cobweb-like flow channel two-phase liquid cooling plate

Abstract

The utility model discloses a cobweb-like flow channel two-phase liquid cooling plate, which comprises a substrate, a main flow channel and a plurality of branch flow channels are formed on the front surface of the substrate, the branch flow channels are Tesla valve flow channels and are C-shaped, the two opposite sides of the main flow channel are respectively provided with a plurality of branch flow channels, and the branch flow channels are communicated with the main flow channel. The width of the main runner is gradually increased in the direction from the middle of the main runner to the two ends of the main runner, the two ends of the branch runners are connected to the two ends of the main runner in a one-to-one correspondence mode, and the lengths of the branch runners are gradually increased in the direction from the inner sides, close to the main runner, of the branch runners to the outer sides, away from the main runner, of the branch runners; the cover plate is installed on the front face and seals the main flow channel and the branch flow channels, a liquid inlet and a liquid outlet are formed in the cover plate, and the liquid inlet and the liquid outlet are aligned to the two ends of the main flow channel respectively. The two-phase liquid cooling plate solves the problem that the temperature of a heat source fluctuates as the motion direction of a vapor-phase refrigerant oscillates and even flows back due to the fluctuation of the internal pressure of the traditional two-phase liquid cooling plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid cooling plate technical field, concretely relates to a two-phase liquid cooling plate of spider web flow channel. BACKGROUND

[0002] Liquid cooling heat dissipation technology is divided into two categories, one is single-phase liquid cooling plate, and the other is two-phase liquid cooling plate.Single-phase liquid cooling plate is that refrigerant absorbs and releases heat through sensible heat, and the temperature of the refrigerant rises after absorbing heat, and the refrigerant after rising flows out of the liquid cooling plate and releases heat in the external heat exchanger and cools down.The heat dissipation principle of two-phase liquid cooling plate is that refrigerant absorbs and releases heat through latent heat, that is, the refrigerant absorbs heat and boils during the process of flowing through the liquid cooling plate, and the refrigerant changes from liquid phase to vapor phase, and the vapor phase refrigerant condenses into liquid phase in the external heat exchanger to release heat.

[0003] Although the efficiency of single-phase liquid cooling heat dissipation is much higher than that of air cooling, the heat power of chips has been increasing continuously in recent years, and the current chip heat flux density has reached 300W / cm 2 or even higher.When the heat flux density exceeds 200W / cm 2 , single-phase liquid cooling heat dissipation basically reaches the limit.Two-phase liquid cooling as a high-efficiency heat dissipation method will be an effective way to deal with high heat flux density scenarios in the future.

[0004] The main problem of two-phase liquid cooling heat dissipation at present is the internal pressure fluctuation of the cooling plate, which causes the movement direction of the vapor phase refrigerant to vibrate and causes the temperature of the heat source to fluctuate.After the heat dissipation of the heat source changes, the dryness of the two-phase flow inside the liquid cooling plate changes, and the proportion of the vapor phase refrigerant increases (power increases) or decreases (power decreases), which causes the system flow resistance to fluctuate, and in severe cases, it will cause the vapor phase refrigerant to flow in reverse.

[0005] The information disclosed in this background section is intended only to enhance understanding of the overall background of the present utility model, and should not be construed as recognition or implicit acknowledgment in any form that this information constitutes prior art known to those of ordinary skill in the art. CONTENT OF THE UTILITY MODEL

[0006] In order to overcome the defects existing in the prior art, a two-phase liquid cooling plate of spider web flow channel is provided to solve the problem that the internal pressure fluctuation of the traditional two-phase liquid cooling plate causes the movement direction of the vapor phase refrigerant to vibrate and even flow in reverse, and then the temperature of the heat source fluctuates.

[0007] In order to achieve the above-mentioned purpose, a two-phase liquid cooling plate of spider web flow channel is provided, which comprises:

[0008] The substrate has a front surface and a back surface, the front surface of the substrate is formed with a main flow channel and a plurality of branch flow channels, the branch flow channels are Tesla valve flow channels and are C-shaped, the main flow channel is arranged at the middle of the front surface, the opposite sides of the main flow channel are respectively provided with the plurality of branch flow channels, the width of the main flow channel gradually increases from the middle of the main flow channel to the two ends of the main flow channel, and the two ends of the branch flow channels are connected to the two ends of the main flow channel one by one.

[0009] The cover plate is mounted on the front surface and closes the main flow channel and the plurality of branch flow channels, the cover plate is provided with an inlet and an outlet, and the inlet and the outlet are respectively aligned with the two ends of the main flow channel.

[0010] Further, the branch flow channel comprises two inclined groove sections and a connecting groove section, one end of the two inclined groove sections is connected to the two ends of the main flow channel respectively, the inclined groove sections are arranged at a preset angle with the end of the main flow channel, the preset angle is 48°-55°, the connecting groove section is connected to the other end of the two inclined groove sections, the distance between the two inclined groove sections gradually decreases from one end of the inclined groove section to the other end of the inclined groove section, and the inclined groove sections of the plurality of branch flow channels gradually lengthen from the middle of the main flow channel to the two ends of the main flow channel.

[0011] Further, the depth of the main flow channel and the branch flow channel is 0.2-4 mm.

[0012] Further, the cover plate is welded to the front surface of the substrate.

[0013] Further, the plurality of branch flow channels are arranged at equal intervals.

[0014] The two-phase liquid cooling plate with a spider web-like flow channel has the advantages that, when the internal flow channel of the liquid cooling plate is designed, the two-phase liquid cooling flow channel with a spider web-like structure is made by referring to the structural features of a spider web, the purposes of reducing flow resistance and equally dividing flow are achieved, the internal flow resistance of the water cooling plate is reduced while the liquid cooling heat dissipation effect is ensured, the spider web structure is similar to the flow direction of the branch flow channel, but is not completely the same, the horizontal cross section of the flow channel is a regular hexagonal structure, one end of the main flow channel is water inlet, one end is water outlet, the included angle between each branch flow channel and the water inlet and outlet main pipeline is 48°-55°, and the flow channel depth is 0.2-4 mm.

[0015] The two-phase liquid cooling plate with a spider web-like flow channel comprises a substrate and a cover plate. The branch flow channel adopts a Tesla valve flow channel and a spider web-like flow channel, the branch flow channel is similar to the spider web in the flow direction, but is not completely the same, the horizontal cross section of the flow channel is a regular hexagonal structure, one end of the main flow channel is water inlet, one end is water outlet, the included angle between each branch flow channel and the water inlet and outlet main pipeline is 48°-55°, and the flow channel depth is 0.2-4 mm. The substrate and the cover plate are welded by diffusion welding or electron beam welding.

[0016] This invention's spiderweb-like two-phase liquid cooling plate ensures that even with pressure fluctuations within the plate, the vapor phase refrigerant can still flow along the main flow path, effectively improving the fluid dynamics within the water-cooled plate. Simultaneously, the branch channels have a higher coverage density, resulting in more uniform heat source temperature and lower system thermal resistance compared to traditional flow channels. Attached Figure Description

[0017] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the structure of the spiderweb-like two-phase liquid cooling plate according to an embodiment of the present invention.

[0019] Figure 2 for Figure 1 The cross-sectional view at point YY.

[0020] Figure 3 This is a schematic diagram of the branch flow channel in an embodiment of the present invention. Detailed Implementation

[0021] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] Reference Figures 1 to 3 As shown, this utility model provides a spider web-like flow channel two-phase liquid cooling plate, including: a substrate 1 and a cover plate 2.

[0024] The substrate 1 has a front side and a back side. The front side of the substrate 1 has a main flow channel and multiple branch flow channels. Refrigerant is filled into the main flow channel and the branch flow channels.

[0025] In this embodiment, the main flow channel A and the branch flow channel B are formed by machining, electrical discharge machining, etching and other methods.

[0026] The main flow channel is located in the center of the front. Multiple branch flow channels are located on either side of the main flow channel. The width of the main flow channel A gradually increases from the center towards both ends of the main flow channel A.

[0027] The branch flow channel is a Tesla valve flow channel and is C-shaped. Two ends of the branch flow channel are connected to two ends of the main flow channel correspondingly. Lengths of the plurality of branch flow channels gradually increase from inner sides of the plurality of branch flow channels close to the main flow channel to outer sides of the plurality of branch flow channels away from the main flow channel.

[0028] Specifically, the branch flow channel comprises two inclined groove segments and a connecting groove segment.

[0029] The two inclined groove segments b1 are connected to two ends of the main flow channel A respectively. The inclined groove segments b1 are arranged at a preset angle with the end portions of the main flow channel A. The preset angle is 48°-55°. The connecting groove segment b2 is connected to the other ends of the two inclined groove segments b1. Distances between the two inclined groove segments gradually decrease from one end of the inclined groove segment to the other end of the inclined groove segment. Lengths of the inclined groove segments of the plurality of branch flow channels gradually increase from the middle portion of the main flow channel to the two ends of the main flow channel. Distances between the two inclined groove segments b1 gradually decrease from one end of the inclined groove segment b1 to the other end of the inclined groove segment b1.

[0030] In the embodiment, the plurality of branch flow channels B are arranged at equal intervals.

[0031] The cover plate 2 is mounted on the front surface of the base plate 1. The cover plate 2 is welded to the front surface of the base plate 1.

[0032] In the embodiment, the shape and size of the cover plate are adapted to the shape and size of the base plate. The cover plate 2 encloses the main flow channel A and the plurality of branch flow channels B.

[0033] The cover plate 2 encloses the main flow channel and the plurality of branch flow channels. The cover plate 2 is provided with an inlet port C and an outlet port D. The inlet port C and the outlet port D are aligned with two ends of the main flow channel A respectively. The inlet port C and the outlet port D are connected to the refrigerant source through pipe joints respectively.

[0034] The pipe joints are welded to the inlet port C and the outlet port D of the cover plate in the form of argon arc welding or high-frequency welding.

[0035] In the embodiment, in order to avoid fluctuations in the movement of the vapor-phase refrigerant, the Tesla valve flow channel is used as the branch flow channel, so that the direction of the refrigerant flow does not change when the pressure of the vapor-phase refrigerant fluctuates. The Tesla valve flow channel can only push the refrigerant flow by using its own space structure, and does not need to input energy to realize the one-way conduction characteristics of the fluid.

[0036] In addition, the internal flow channel of the spider-web flow channel two-phase liquid cooling plate is similar to the biological tissue structure (such as leaf veins, branches, and wing veins), and the fluid mechanics characteristics in the refrigerant flow process are also similar to the fluid mechanics characteristics of the internal material of the tissue structure. Therefore, the biological structure is simulated, and the fluid dynamics characteristics in the liquid cooling plate can be better optimized.

[0037] The two-phase liquid cooling plate with the spider-web-like flow channel can refer to the structural features of a spider web when designing the internal flow channel of the liquid cooling plate, and can be made into a two-phase liquid cooling flow channel with a spider-web-like structure to realize the purposes of reducing flow resistance and evenly distributing flow, so that the internal flow resistance of the water cooling plate is reduced while the liquid cooling heat dissipation effect is ensured.

[0038] The two-phase liquid cooling plate with the spider-web-like flow channel comprises a base plate and a cover plate. The branch flow channel adopts a Tesla valve flow channel and a spider-web-like flow channel, the branch flow channel has a similar but not completely same trend as the spider web, the horizontal section of the flow channel has a regular hexagonal structure, one end of the main flow channel is water inlet and the other end is water outlet, the included angle between each branch flow channel and the water inlet and outlet main pipeline is 48-55 degrees, and the flow channel depth is 0.2-4 mm. The base plate and the cover plate are welded by diffusion welding or electron beam welding.

[0039] The two-phase liquid cooling plate with the spider-web-like flow channel can ensure that the vapor-phase refrigerant can still flow along the main flow channel direction after the pressure in the two-phase liquid cooling plate fluctuates, and effectively improve the internal fluid dynamics of the water cooling plate. Meanwhile, the coverage density of the branch flow channel is larger, the heat source temperature is more uniform, and the system thermal resistance is lower than that of the traditional flow channel.

[0040] The above description is only the preferred embodiment of the application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the utility model disclosed in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and also covers other technical solutions formed by the combination of the above technical features or equivalent features without departing from the utility model concept. For example, the above features can be replaced by the technical features disclosed in the present application (but not limited to) with similar functions to form technical solutions.

Claims

1. A spiderweb-like two-phase liquid cooling plate, characterized in that, include: A substrate having a front side and a back side, wherein a main channel and a plurality of branch channels are formed on the front side of the substrate, the branch channels being Tesla valve channels and C-shaped, the main channel being disposed in the middle of the front side, and the plurality of branch channels being disposed on opposite sides of the main channel, the width of the main channel gradually increasing from the middle of the main channel toward both ends of the main channel, the two ends of the branch channels being connected to the two ends of the main channel one to one, and the length of the plurality of branch channels gradually increasing from the inner side of the plurality of branch channels near the main channel toward the outer side of the plurality of branch channels away from the main channel; A cover plate is installed on the front and closes the main flow channel and the multiple branch flow channels. The cover plate has an inlet and an outlet, which are respectively aligned with the two ends of the main flow channel.

2. The spiderweb-like flow channel two-phase liquid cooling plate according to claim 1, characterized in that, The branch channel includes two inclined groove sections and a connecting groove section. One end of each of the two inclined groove sections is connected to both ends of the main channel. The inclined groove sections are set at a preset angle to the ends of the main channel, the preset angle being 48° to 55°. The connecting groove section is connected to the other end of the two inclined groove sections. The distance between the two inclined groove sections gradually decreases from one end of the inclined groove section to the other end. The inclined groove sections of the multiple branch channels gradually increase in length from the middle of the main channel to both ends of the main channel.

3. The spiderweb-like flow channel two-phase liquid cooling plate according to claim 2, characterized in that, The depth of the main flow channel and the branch flow channels is 0.2 to 4 mm.

4. The spiderweb-like flow channel two-phase liquid cooling plate according to claim 1, characterized in that, The cover plate is welded to the front side of the substrate.

5. The spiderweb-like flow channel two-phase liquid cooling plate according to claim 1, characterized in that, The multiple branch channels are arranged at equal intervals.

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