A circulating cooling system based on Tesla valve

Abstract

The present invention belongs to the technical field related to heat dissipation system, and discloses a circulating heat dissipation system based on Tesla valve. The system includes: two groups of Tesla valves; a collecting plate, which is a disc-shaped cavity structure, in which a heat exchange fluid is arranged, one surface of which is attached to the surface of the object to be dissipated, and the other surface is provided with a steam output port; two transport pipelines, one end of which is connected to the output port and the other end is connected to the middle of the first group of Tesla valves, and the other end of which is connected to the output port and the other end is connected to the middle of the second Tesla valve; a heat dissipation pipeline, the inlet of the heat dissipation pipeline is connected to the outlet of the two groups of Tesla valves, and the outlet of the heat dissipation pipeline is connected to the inlet of the two groups of Tesla valve tubes; a heat sink is provided in the middle of the heat dissipation pipeline. The present application significantly improves the heat dissipation performance, and is particularly suitable for small-volume heat dissipation devices that require rapid heat dissipation.

Description

Technical Field

[0001] The present invention belongs to the technical field related to heat dissipation systems, and more specifically, relates to a circulation heat dissipation system based on a Tesla valve. Background Art

[0002] Electronic components are increasingly showing a trend of miniaturization and high power consumption. How to solve the problem of performance degradation caused by high heat generation of electronic components has attracted widespread attention. The integration of electronic components and chips is getting higher and higher, and as their functions become more complicated, energy consumption also increases accordingly. The increase in integration and energy consumption has resulted in the performance of the chip being limited by the high heat flux density generated by the chip in a small space. Therefore, a heat dissipation device that can quickly dissipate heat and is suitable for a small volume is needed.

[0003] At present, two-dimensional planar heat dissipation is mainly achieved by using a phase change heat transfer heat spreader, which has a simple structure, mature technology and low cost. When heat is applied to the bottom of the heat spreader, the liquid evaporates as the heat increases, and the vapor rises to the top of the container to produce condensation, relying on the liquid absorption core to return to the evaporation surface to form a cycle. The heat spreader can quickly transfer and diffuse the heat flow generated by the highly integrated chip to a large area of ​​the condensation surface, thereby promoting the dissipation of heat, reducing the heat flux density on the surface of the components, and ensuring its reliable operation. The heat spreader has low thermal resistance, good temperature uniformity, fast thermal conductivity, large heat transfer capacity, and good adaptability, which can meet the heat dissipation and space requirements of high-performance electronic components.

[0004] However, the temperature plate relies on gravity to achieve liquid downflow and gas upflow, but there are problems such as poor reflux of gaseous and liquid working fluids. Chinese patent CN2020231653908 discloses a Tesla valve phase change temperature plate. This invention patent connects multiple groups of Tesla valves in series and in parallel to form a fluid channel. The bottom of the Tesla valve is used as the heat exchange surface. However, it only improves the temperature plate, but the entire heat dissipation channel is the focus of heat dissipation, so its heat dissipation performance needs to be further improved. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a circulating heat dissipation system based on the Tesla valve, which significantly improves the heat dissipation performance and is particularly suitable for small-volume heat dissipation devices that require rapid heat dissipation.

[0006] To achieve the above-mentioned purpose, according to one aspect of the present invention, a circulating heat dissipation system based on Tesla valves is provided, and the system includes: two groups of Tesla valves; a collecting plate, which is a disc-shaped cavity structure, in which a heat exchange fluid is provided, one surface of which is attached to the surface of the object to be cooled, and the other surface is provided with a steam output port; two transport pipelines, one end of one transport pipeline is connected to the output port, and the other end is connected to the middle of the first group of Tesla valves, and one end of the other transport pipeline is connected to the output port, and the other end is connected to the middle of the second Tesla valve; a heat dissipation pipeline, the inlet of the heat dissipation pipeline is connected to the outlet of the two groups of Tesla valves, and the outlet of the heat dissipation pipeline is connected to the inlet of the two groups of Tesla valve tubes; a heat sink is provided in the middle of the heat dissipation pipeline.

[0007] Preferably, the interior bottoms of the two transport conduits are provided with liquid absorbing material.

[0008] Preferably, the liquid-absorbing material is a water-absorbing epoxy resin or a water-absorbing fiber strip.

[0009] Preferably, a plurality of capillaries are provided at the bottom of the two transport pipes, and the pipe direction of the plurality of capillaries is the same as that of the transport pipes.

[0010] Preferably, the surface of the heat sink is provided with heat dissipation fins or a heat dissipation fan.

[0011] Preferably, the attached heat exchange surface of the collecting plate is made of metal material, and a plurality of heat exchange columns are arranged inside the attached heat exchange surface.

[0012] Preferably, the shape of the attached heat exchange surface of the collecting plate is the same as the surface of the object to be cooled.

[0013] Preferably, the output port of the collecting tray is also provided with a liquid replacement valve.

[0014] Preferably, the heat sink is made of graphene or copper sheet.

[0015] In general, compared with the prior art, the above technical solution conceived by the present invention provides a circulating heat dissipation system based on a Tesla valve, which has the following beneficial effects:

[0016] 1. The collecting plate of the present application is provided with double outlets, so that the steam of the heat exchange fluid in the collecting plate can be discharged quickly. After being discharged, the steam passes through the Tesla valve tube with a one-way flow characteristic and then further dissipates heat through the heat dissipation pipeline. The liquid generated after heat exchange is circulated back to the collecting plate from the lower part of the transport pipeline for heat exchange. The structure is simple and the integration is high, which is especially suitable for heat exchange requirements in small spaces.

[0017] 2. The bottom of the two transport pipes is provided with liquid absorbing materials or capillaries to provide power for the flow of the liquid, so that the heat exchange liquid can circulate quickly from the bottom to the collecting plate without affecting the movement of the upper steam.

[0018] 3. A metal column is arranged inside the collecting plate, which can quickly exchange the heat absorbed by the surface of the collecting plate with the heat exchange fluid inside the collecting plate. At the same time, the columnar structure also increases the internal disturbance to enhance the heat exchange and improve the heat exchange efficiency.

[0019] 4. The shape of the heat exchange surface of the collecting plate is the same as the surface of the object to be cooled, so that the collecting plate can be closely attached to the surface of the object to be cooled, thereby facilitating heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the principle of a circulating heat dissipation system based on a Tesla valve in an embodiment of the present application.

[0021] Figure 2 It is a schematic diagram of the structure of a circulating heat dissipation system based on a Tesla valve in an embodiment of the present application.

[0022] Figure 3 It is a schematic diagram of the structure of two groups of Tesla valves in an embodiment of the present application.

[0023] Figure 4 It is a schematic diagram of the structure when a capillary tube is arranged in the transport pipeline according to an embodiment of the present application.

[0024] Figure 5 (a) is a pressure curve at the output port calculated in the embodiment of the present application; (b) is a pressure curve at the reflux port; (c) is a velocity curve at the output port; and (d) is a velocity curve at the reflux port.

[0025] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0026] 1-collecting plate; 2-liquid exchange valve; 3-steam output port; 4-transport pipeline; 5-Tesla valve; 51-first group of Tesla valves; 52-second group of Tesla valves; 6-heat sink; 7-first inlet; 8-second inlet; 9-output port; 10-reflux port; 11-heat dissipation pipeline. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] See also Figure 1 and Figure 2 The present invention provides a circulating heat dissipation system based on Tesla valves, the system includes two groups of Tesla valves 5, a collecting plate 1, two transport pipelines 4, and a heat dissipation pipeline 11, and the specific structure is as follows.

[0029] The two groups of Tesla valves 5 include a first group of Tesla valves 51 and a second group of Tesla valves 52. The inlet end of the first group of Tesla valves 51 is connected to the inlet end of the second group of Tesla valves 52, and the outlet end of the first group of Tesla valves 51 is connected to the outlet end of the second group of Tesla valves 52. The middle parts of the first group of Tesla valves 51 and the second group of Tesla valves 52 are both provided with inlets, so that the two groups of Tesla valves 5 form a quadrilateral structure.

[0030] The above-mentioned quadrilateral Tesla valve 5 can be formed by laser etching technology or 3D printing technology, so that the four corners of the quadrilateral Tesla valve are all three-way structures, such as Figure 3 As shown, they are respectively a first inlet 7, a second inlet 8, an output port 9 and a reflux port 10. The material may be metal or a material that is convenient for 3D printing. The conduits of the first group of Tesla valves 51 and the second group of Tesla valves 52 have the same direction, which serves to regularize the steam entering the Tesla valve conduits in both directions into a one-way flow.

[0031] The collecting plate is preferably a metal plate-shaped structure, with a cavity inside and a heat exchange fluid inside. An enhanced heat exchange surface is arranged inside the collecting plate to be attached to the surface of the object to be cooled, and a steam outlet 3 is arranged on the other surface.

[0032] In a further preferred solution, the attached heat exchange surface of the collector plate is made of metal material, and a plurality of heat exchange columns, preferably metal columns, are arranged on the inner side of the attached heat exchange surface. The shape of the attached heat exchange surface of the collector plate is the same as the surface of the object to be cooled. Thus, the plurality of heat exchange columns can absorb more heat on the one hand, and on the other hand, the columnar protrusions can penetrate into the interior of the heat exchange fluid, and thus can exchange heat with the heat exchange fluid more evenly, so that the heat exchange fluid can exchange heat with the heat exchange columns in time. Furthermore, the columnar protrusions can increase internal disturbances, thereby further enhancing heat exchange.

[0033] One of the two transport pipelines 4 has one end connected to the output port and the other end connected to the middle of the first group of Tesla valve tubes. The other transport pipeline has one end connected to the output port and the other end connected to the middle of the second Tesla valve tube.

[0034] In a further preferred embodiment, the bottom of the two transport pipes 4 is provided with a liquid absorbing material, which is preferably made of water absorbing epoxy resin or water absorbing fiber strips.

[0035] In a further preferred embodiment, the bottom of the two transport pipes 4 is provided with a plurality of capillaries (such as Figure 4 As shown), the pipeline direction of multiple capillaries is the same as that of the transport pipeline.

[0036] The liquid-absorbing material or capillary tube provides power for the transmission of the liquid, so that the flow of the liquid in the transport pipeline and the flow of the upper steam do not interfere with each other, so that the liquid and the gas flow in the same pipeline, thereby improving the integration.

[0037] The inlet of the heat dissipation pipe 11 is connected to the outlets of the two groups of Tesla valve pipes, and the outlet of the heat dissipation pipe 11 is connected to the common inlet of the two groups of Tesla valve pipes. A heat sink 6 is provided in the middle of the heat dissipation pipe 11. The heat sink material is preferably graphene, copper sheet or other high heat transfer coefficient material, which can cool the steam into liquid, and then circulate to the collecting plate through the transport pipeline after being transmitted through some Tesla valve pipes.

[0038] In a further preferred solution, the surface of the heat sink 6 is provided with heat dissipation fins or a heat dissipation fan.

[0039] In a further preferred embodiment, the output port of the collecting tray is further provided with a liquid exchange valve 2, and the liquid exchange valve 2 can be buckled inside the collecting tray, or can be a liquid exchange hole installed outside the collecting tray, and waste liquid or impurities can be discharged from the port.

[0040] In this application, the heat exchange fluid turns into steam after absorbing heat in the collecting plate, and the steam is transmitted to the Tesla valve pipe from two transport pipes, such as Figure 1 As shown, due to the one-way output function of the Tesla valve tube, the steam is output from the right Tesla valve tube and flows into the heat dissipation pipe. After the steam dissipates heat in the heat dissipation pipe, it is input into the Tesla valve tube again, passes through the left Tesla valve tube and flows into the transport pipe from the middle, and then circulates back to the collecting plate from the transport pipe for heat exchange.

[0041] Compared with traditional technologies, this cooling system has no moving parts and can prevent coolant vapor from flowing back to the phase change temperature plate to affect heat transfer, thereby enabling electronic components or chips to cool down faster.

[0042] The quadrilateral Tesla valve in this application is simulated, and the simulation results are as follows: Figure 5 As shown in (a) to (d), the fluid velocity and pressure at the output port 9 of the quadrilateral Tesla valve are significantly higher than those at the return port 10, indicating that the solution in the present application can achieve unidirectional flow of the fluid, thereby ensuring the safety and stability of the present application.

[0043] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A circulating heat dissipation system based on Tesla valve, characterized in that: The system comprises: Two sets of Tesla valves; The collecting plate is a disc-shaped cavity structure, in which a heat exchange fluid is arranged, one surface of which is attached to the surface of the object to be cooled, and the other surface of which is provided with a steam outlet; Two delivery pipelines, one of which has one end connected to the output port and the other end connected to the middle of the first set of Tesla valves, and the other of which has one end connected to the output port and the other end connected to the middle of the second Tesla valve; A heat dissipation pipeline, wherein the inlet of the heat dissipation pipeline is connected to the outlet of the two sets of Tesla valves, and the outlet of the heat dissipation pipeline is connected to the inlet of the two sets of Tesla valve pipes; A heat sink is arranged in the middle of the heat dissipation pipe.

2. The system according to claim 1, characterized in that The interior bottoms of both transport conduits are provided with liquid absorbing material.

3. The system according to claim 2, characterized in that The liquid-absorbing material is water-absorbing epoxy resin or water-absorbing fiber strips.

4. The system according to claim 1, characterized in that A plurality of capillaries are arranged at the bottom of the two transport pipelines, and the pipeline direction of the plurality of capillaries is the same as that of the transport pipelines.

5. The system according to claim 1, characterized in that The surface of the heat sink is provided with heat dissipation fins or a heat dissipation fan.

6. The system according to claim 1, characterized in that The attached heat exchange surface of the collecting plate is made of metal material, and a plurality of heat exchange columns are arranged inside the attached heat exchange surface.

7. The system according to claim 1, characterized in that The shape of the attached heat exchange surface of the collecting plate is the same as the surface of the object to be cooled.

8. The system according to claim 1, characterized in that The output port of the collecting plate is also provided with a liquid replacement valve.

9. The system according to claim 1, characterized in that The material of the heat sink is graphene or copper sheet.

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