Phase change heat exchanger capable of dissipating heat uniformly

Abstract

The invention discloses a uniform heat dissipation phase change heat exchanger in the technical field of heat dissipation, which comprises a heat exchange frame, a heat dissipation pipeline and two heat insulation plates, the heat dissipation pipeline is sleeved with a heat dissipation wall, a plurality of adjacent heat dissipation layers are arranged in the heat dissipation wall, a cavity is formed in each heat dissipation layer, a first partition plate is fixedly connected in each cavity, and a second partition plate is fixedly connected in each cavity. The first partition plate divides the cavity into a driving cavity and a fluid cavity, a second partition plate is slidably connected to the side wall of the heat dissipation layer and divides the fluid cavity into a second heat conduction cavity and a first heat conduction cavity, one side of the first heat conduction cavity in the heat dissipation layer is close to the outer side wall of the heat dissipation pipeline, and a plurality of bimetallic strips are arranged on the side, close to the second heat conduction cavity, of the second partition plate. The active layers of the bimetallic strips are fixedly connected with the second partition plate. By arranging the multiple heat dissipation layers, uniform heat dissipation in the pipeline under different temperature conditions is met, the bimetallic strip drives the second partition plate to extrude towards the first heat conduction cavity, the risk of heat stress concentration is reduced, and the heat dissipation capacity of the first heat conduction cavity is enhanced.

Description

Technical Field

[0001] The invention belongs to the technical field of heat exchangers, in particular to a phase-change heat exchanger with uniform heat dissipation. Background Art

[0002] Phase change heat exchanger is a device that uses the property of absorbing or releasing a large amount of latent heat during the phase change of a substance to achieve efficient heat exchange. In a phase change heat exchanger, the working medium undergoes a phase change at a specific temperature and pressure, such as liquid to gas, and this process is accompanied by a large amount of heat transfer, allowing thermal energy to be transferred from one system to another in an efficient and controllable manner. Phase change heat exchanger is widely used in refrigeration, air conditioning, power generation, chemical industry and other fields, and is one of the key equipment for achieving efficient energy utilization and conversion.

[0003] During the operation of the phase change heat exchanger, it is crucial to achieve uniform distribution and effective heat dissipation. However, traditional phase change heat exchangers often have the problem of uneven heat dissipation, which is mainly due to the large temperature gradient inside the pipeline and the unreasonable design of the heat transfer path, resulting in uneven heat dissipation. This uneven heat dissipation state will cause local overheating, affect the heat exchange efficiency, and may even accelerate the aging of equipment parts and shorten the service life of the equipment. In addition, during the phase change process, due to the rapid change in temperature, traditional phase change heat exchangers are prone to thermal stress concentration. This will not only cause material fatigue, but may also cause cracks, deformation and other problems, affecting the overall performance and safety of the equipment. Therefore, it is necessary to propose a phase change heat exchanger with uniform heat dissipation to solve the problem of uneven heat dissipation during the phase change process that affects the use of the phase change heat exchanger. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to set up a plurality of heat dissipation layers to meet the uniform heat dissipation under different temperature conditions in the pipeline, and the bimetallic strip drives the second partition to squeeze into the first heat conduction cavity, thereby reducing the risk of thermal stress concentration and enhancing the heat dissipation capacity of the first heat conduction cavity.

[0005] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a phase change heat exchanger with uniform heat dissipation, comprising a heat exchange frame, a heat dissipation pipe and two heat insulation plates, the heat insulation plates are fixedly connected to the heat exchange frame, two ends of the heat dissipation pipe respectively pass through the heat insulation plates and extend to the upper and lower parts of the heat exchange frame, and an inlet and an outlet are respectively arranged at both ends of the heat dissipation pipe, a heat dissipation wall is sleeved on the heat dissipation pipe, a plurality of adjacent heat dissipation layers are arranged in the heat dissipation wall, each heat dissipation layer is provided with a cavity inside, a first partition is fixedly connected in the cavity, the first partition divides the cavity into a driving cavity and a fluid cavity, a second partition is slidably connected to the side wall of the heat dissipation layer, and the second partition is slidably connected to the first partition, the second partition divides the fluid cavity into a second heat conduction cavity and a first heat conduction cavity, a third partition is fixedly connected between a side of the first partition away from the second partition and a side wall of the driving cavity, the third partition divides the driving cavity into a first expansion cavity and a second expansion cavity, a first expansion capsule is arranged in the first expansion cavity, one side of the first heat conduction cavity is connected to the first expansion capsule, a second expansion capsule is arranged in the second expansion cavity, one side of the second heat conduction cavity is connected to the second expansion capsule;

[0006] One side of the first heat conduction cavity and the first expansion cavity are both close to the outer wall of the heat dissipation pipe, a plurality of bimetallic strips are arranged on the side of the second partition close to the second heat conduction cavity, the active layers of the bimetallic strips are fixedly connected to the second partition, the passive layers of the bimetallic strips are fixedly connected to the side wall of the second heat conduction cavity, a first heat conduction fluid is arranged in the first heat conduction cavity, a second heat conduction fluid is arranged in the second heat conduction cavity, and the thermal conductivity of the first heat conduction fluid is higher than the thermal conductivity of the second heat conduction fluid.

[0007] The principle of the basic solution is: inside the heat exchanger, the heat dissipation pipe serves as the main channel for heat exchange. The phase change material flowing in the heat dissipation pipe will release a large amount of heat when the phase change occurs. The heat is transferred to the various heat dissipation layers in the heat dissipation wall through the heat dissipation pipe, and is first absorbed by the first heat conduction fluid in the first heat conduction cavity, and then transferred to the second heat conduction cavity. As the heat accumulates, the bimetallic strip in the second heat conduction cavity supports the second partition, causing the second partition to slide from the second heat conduction cavity to the first heat conduction cavity. In this process, the volume of the second heat conduction cavity increases, the volume of the first heat conduction cavity is compressed, and the path of heat transfer in the first heat conduction cavity becomes shorter, so that the heat can pass through the first heat conduction cavity faster and enter the second heat conduction cavity to achieve heat transfer.

[0008] The first expansion bladder and the second expansion bladder contain part of the first heat-conducting fluid and the second heat-conducting fluid respectively. When the first heat-conducting cavity is squeezed, part of the first heat-conducting fluid in the first heat-conducting cavity is squeezed into the first expansion bladder, the volume of the first expansion bladder continues to increase, the volume of the second heat-conducting cavity decreases, and part of the second heat-conducting fluid in the second expansion bladder flows back to the second heat-conducting cavity.

[0009] When the system reaches a thermal equilibrium state, that is, the temperature remains stable, the bimetallic strip stops deforming and the second partition also stops sliding. The heat is continuously dissipated through the heat dissipation layer. When the heat exchange in the heat dissipation pipe is completed, the temperature in the heat dissipation layer decreases, and the deformation of the bimetallic strip is reset. At this time, the first expansion bag squeezed by the first heat transfer fluid will gradually squeeze the first heat transfer fluid inside back into the first heat transfer cavity after reaching the elastic deformation limit, thereby pushing the second partition to move toward the second heat transfer cavity, thereby resetting the second partition.

[0010] The beneficial effects of the basic solution are as follows: 1. Multiple adjacent heat dissipation layers are set in the heat dissipation wall, and each heat dissipation layer has the function of automatic adjustment and partition heat dissipation. This multi-layer structure enables the entire heat exchanger to achieve a larger heat dissipation area and higher heat dissipation efficiency in a limited space. At the same time, the layers are separated by insulation boards, which reduces the loss during heat transfer and improves the overall thermal energy utilization rate. Multiple heat dissipation layers can adapt to the changes in different temperatures in the pipeline to transfer different amounts of heat, allowing the heat dissipation wall to achieve adaptive functions.

[0011] 2. Traditional heat sinks often rely on a fixed heat conduction path, while the present invention innovatively introduces a combination of a bimetallic strip and a second baffle. The bimetallic strip uses the difference in thermal expansion coefficients of different metal layers to bend when the temperature changes, thereby driving the second baffle to slide in the fluid cavity. This automatic adjustment mechanism can dynamically adjust the heat dissipation path according to the actual heat transfer situation, improve heat dissipation efficiency and realize automatic control.

[0012] 3. The heat is first rapidly absorbed and transferred in the first heat conduction cavity, and then gradually released into the second heat conduction cavity through the sliding of the second partition and the action of the bimetallic strip. By compressing the volume of the first heat conduction cavity, further rapid heat transfer is achieved, thereby improving the heat transfer efficiency in the insulation layer.

[0013] 4. Since the thermal conductivity of the second heat-conducting fluid in the second heat-conducting cavity is low and the heat dissipation effect is poor, when the volume of the second heat-conducting cavity increases, the reflux of the second heat-conducting fluid increases, so that the heat can be further exchanged with the second heat-conducting fluid and dissipated, thereby achieving heat dispersion and avoiding the occurrence of local overheating.

[0014] Furthermore, the insulation plate separates the heat exchange frame into three layers from top to bottom, and the heat dissipation pipe includes a first pipe, a second pipe and a third pipe, which are respectively located inside the three layers of the insulation frame, the first pipe is connected to the inlet, and the third pipe is connected to the outlet.

[0015] The beneficial effect of the basic solution is that by dividing the heat dissipation pipeline into an independent first pipeline, a second pipeline and a third pipeline, the heat dissipation requirements of different states when the working medium undergoes a phase change are met.

[0016] Furthermore, an air valve is fixedly connected to one end of the first pipeline close to the inlet.

[0017] The beneficial effect of the basic scheme is: since the volume of gas is greater than that of liquid at the same mass, and the resistance encountered by liquid when flowing is relatively large, in the process of phase change from gas to liquid, in order to balance the phase change process of gas and liquid in the pipeline and prevent the accumulation of gas in the pipeline before the liquid flows out in time during gas transportation, the gas valve can be adjusted to close or reduce the gas input when the gas in the heat dissipation pipeline increases, thereby ensuring that the phase change balance is maintained in the heat dissipation pipeline.

[0018] Furthermore, a plurality of seals are fixedly connected to the outer wall of the heat exchange frame.

[0019] The beneficial effects of the basic solution are: the seal can effectively seal the gap between the heat dissipation pipe and the insulation wall to avoid medium leakage, and the seal also has a certain heat insulation effect, which can reduce the heat loss of the heat exchanger during operation.

[0020] Furthermore, the thermal insulation panels are all made of aerogel.

[0021] The beneficial effects of the basic solution are: aerogel can significantly reduce heat transfer in the vertical direction, avoiding heat influence between adjacent insulation walls, and aerogel is light in weight. When used as an insulation board, it will not cause excessive pressure on the insulation wall and cause damage to the insulation layer inside the insulation wall, thereby improving the stability of the device.

[0022] Furthermore, straight fins are fixedly connected to the heat dissipation layer outside the second heat conduction cavity, and serrated fins are fixedly connected to the heat dissipation layer outside the first heat conduction cavity.

[0023] The beneficial effects of the basic solution are: 1. For the second heat conduction cavity, the straight fin design can provide a more direct and efficient heat dissipation path. The straight fin has a simple structure and relatively small air flow resistance, which is conducive to the rapid flow of air and the removal of heat. This design is particularly suitable for cavities with low thermal conductivity because it can maximize the limited heat conduction capacity and effectively dissipate heat to the surrounding environment.

[0024] 2. For the first heat conduction cavity, the serrated fin design can increase the heat dissipation area and improve the heat dissipation efficiency. The serrated fin increases the surface area of ​​the fin and changes the air flow path, so that the air can generate more turbulence and eddy currents when flowing through the fin, thereby enhancing the heat exchange between the air and the fin.

[0025] Furthermore, a first elbow is connected between one end of the first pipe away from the inlet and the second pipe, a spiral fin is fixedly connected around the first elbow, and a plurality of low-fin high-fins are fixedly connected around the first pipe.

[0026] The beneficial effects of the basic scheme are: when the phase change heat exchanger is used for the conversion from gas to liquid, the first pipe close to the inlet is gaseous, and the low-fin high-fin can increase the flow disturbance of the gaseous medium and promote the heat exchange between the gaseous medium and the pipe wall. The low-fin design reduces the flow resistance, while the high fin increases the heat exchange area, thereby improving the heat exchange efficiency; and since there is no insulation layer at the bend, the application of spiral fins in the first bend further enhances the heat exchange of the gaseous medium during the turning process. The spiral fins can guide the medium to form a spiral flow, increase the contact time and area between the medium and the fins, thereby improving the heat exchange efficiency.

[0027] Furthermore, the end of the second pipe away from the first bend is connected to a second bend located at an end of the third pipe away from the outlet, a plurality of spiral fins are fixedly connected around the second bend, a plurality of wavy fins are fixedly connected around the second pipe, and the first pipe, the first bend, the second pipe, the second bend and the third pipe together constitute a serpentine pipe.

[0028] The beneficial effects of the basic scheme are: as the gaseous medium enters the second pipe, the gas is partially condensed into liquid during the heat exchange with the phase change material. At this time, the second pipe is mostly in a gas-liquid mixed state, and the wave fins can produce complex flow patterns, promote mixing and heat transfer between the gas and liquid phases, and further improve the heat exchange efficiency; similar to the first elbow, the spiral fins in the second elbow also enhance the heat exchange of the medium during the turning process, especially when the gas and liquid phases coexist, the spiral flow helps gas-liquid mixing and heat transfer. In addition, the serpentine pipe formed by the combination of the pipe and the elbow saves space and makes the entire system more compact.

[0029] Furthermore, a plurality of corrugated fins are fixedly connected around the third pipe.

[0030] The beneficial effects of the basic solution are: most of the third pipe is liquid, the wave fins can increase the turbulence of the liquid medium, improve the heat exchange efficiency between the liquid medium and the pipe wall, and the wave fins can also slow down the medium flow rate to a certain extent, prolong the residence time of the medium in the pipe, thereby increasing the heat exchange time.

[0031] Furthermore, a plurality of springs are fixedly connected between the outer shells and inner walls of the first expansion bladder and the second expansion bladder.

[0032] The beneficial effect of the basic solution is that the addition of the spring provides additional support force for the first expansion bladder and the second expansion bladder, so that the first expansion bladder can maintain better shape stability when it is squeezed by the first heat-conducting fluid and contacts the inner wall of the heat dissipation layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1It is a front cross-sectional view of a phase change heat sink with uniform heat dissipation in an embodiment of the present invention.

[0034] Figure 2 It is a front cross-sectional view of the heat dissipation layer of a phase change heat dissipator with uniform heat dissipation in an embodiment of the present invention.

[0035] Figure 3 It is a front view schematic diagram of a phase change heat sink for uniform heat dissipation in an embodiment of the present invention.

[0036] The figure marks in the drawings of the specification include: 1, heat exchange frame; 2, heat dissipation pipe; 3, heat insulation board; 4, heat dissipation layer; 5, second heat conduction cavity; 6, first heat conduction cavity; 7, first pipe; 8, first elbow; 9, second pipe; 10, second elbow; 11, third pipe; 12, air valve; 13, second expansion cavity; 14, second expansion bag; 15, first expansion cavity; 16, first expansion bag; 17, first partition; 18, second partition; 19, second heat transfer fluid; 20, first heat transfer fluid; 21, bimetallic strip; 22, heat dissipation wall; 23, inlet; 24, outlet; 25, low fin and high fin; 26, spiral fin; 27, wave fin. DETAILED DESCRIPTION

[0037] The following is further described in detail through specific implementation methods:

[0038] Embodiment 1:

[0039] Basically as attached Figure 1 , Figure 2 and Figure 3 As shown: a phase change heat exchanger with uniform heat dissipation, including a heat exchange frame 1, a heat dissipation pipe 2 and two heat insulation plates 3, the heat insulation plates 3 are made of aerogel material for preventing vertical heat transfer, the heat insulation plates 3 are welded on the heat exchange frame 1, a plurality of seals are bonded to the outer wall of the heat exchange frame 1, the two ends of the heat dissipation pipe 2 respectively pass through the heat insulation plates 3 and extend to the upper and lower parts of the heat exchange frame 1, and the two ends of the heat dissipation pipe 2 are respectively provided with an inlet 23 and an outlet 24.

[0040] A heat dissipation wall 22 is sleeved on the heat dissipation pipe 2, and a plurality of adjacent heat dissipation layers 4 are arranged in the heat dissipation wall 22. A cavity is arranged inside each heat dissipation layer 4, and a first partition 17 is welded in the cavity. The first partition 17 divides the cavity into a driving cavity and a fluid cavity from left to right. A second partition 18 is slidably connected to the side wall of the heat dissipation layer 4, and the second partition 18 is slidably connected to the first partition 17. The second partition 18 divides the fluid cavity into a second heat conduction cavity 5 and a first heat conduction cavity 6. Straight fins are welded on the heat dissipation layer 4 outside the second heat conduction cavity 5, and the heat dissipation layer outside the first heat conduction cavity 6 is welded to the heat dissipation layer 4 outside the first heat conduction cavity 6. 4 is welded with a serrated fin, a third partition plate 28 is fixedly connected between the side of the first partition plate 17 away from the second partition plate 18 and the side wall of the driving chamber, the third partition plate 28 divides the driving chamber into a first expansion chamber 15 and a second expansion chamber 13, a first expansion chamber 15 is provided with a first expansion capsule 16, one side of the first heat conduction chamber 6 is communicated with the first expansion capsule 16, a second expansion capsule 14 is provided in the second expansion chamber 13, one side of the second heat conduction chamber 5 is communicated with the second expansion capsule 14, and a plurality of springs are welded between the outer shells and the inner walls of the first expansion capsule 16 and the second expansion capsule 14.

[0041] One side of the first heat conduction cavity 6 and the first expansion cavity 15 are close to the outer wall of the heat dissipation pipe 2. A plurality of bimetallic strips 21 are provided on the side of the second partition plate 18 close to the second heat conduction cavity 5. The active layers of the bimetallic strips 21 are welded to the second partition plate 18, and the passive layers of the bimetallic strips 21 are welded to the side wall of the second heat conduction cavity 5. A first heat conduction fluid 20 is provided in the first heat conduction cavity 6, and a second heat conduction fluid 19 is provided in the second heat conduction cavity 5. The thermal conductivity of the first heat conduction fluid 20 is higher than that of the second heat conduction fluid 19.

[0042] The specific implementation process is as follows: the phase-changing working medium is connected to the inlet 23 of the heat dissipation pipe 2. The seal bonded to the heat exchange frame 1 not only effectively closes the gap between the heat dissipation pipe 2 and the insulation wall to prevent medium leakage, but also has a certain insulation effect, reducing heat loss during the operation of the heat exchanger.

[0043] When the phase change material in the heat dissipation pipe 2 undergoes phase transition, a large amount of heat energy is released. This heat energy then flows along the path of the heat dissipation pipe 2, penetrates into the heat dissipation wall 22 structure that fits tightly around the heat dissipation pipe 2, and first meets the high-efficiency heat conduction medium inside the first heat conduction cavity 6. The first heat conduction fluid 20 quickly absorbs this heat and gradually transfers the heat to the adjacent second heat conduction cavity 5.

[0044] At this time, heat is transferred from the first heat conduction cavity 6 to the second heat conduction cavity 5. Because the second heat conduction cavity 5 has poor heat dissipation and its temperature rises, when heat is transferred from the pipeline to the first heat conduction cavity 6 and then to the second heat conduction cavity 5, the bimetallic strip 21 pushes against the second partition plate 18 and slides from the second heat conduction cavity 5 to the first heat conduction cavity 6. At this time, the internal space of the second heat conduction cavity 5 expands, and accordingly, the volume of the first heat conduction cavity 6 is compressed, and the heat transfer path of the heat in the first heat conduction cavity 6 becomes shorter, so that the heat can be better dissipated.

[0045] The first expansion bladder 16 and the second expansion bladder 14 contain part of the first heat-conducting fluid 20 and the second heat-conducting fluid 19 respectively. When the first heat-conducting cavity 6 is squeezed, part of the first heat-conducting fluid 20 in the first heat-conducting cavity 6 is squeezed into the first expansion bladder 16, and the volume of the first expansion bladder 16 continues to increase. The addition of the spring enables the first expansion bladder 16 to maintain better shape stability when it is squeezed by the first heat-conducting fluid 20 and contacts with the inner wall of the heat dissipation layer 4, so that the first expansion bladder 16 will not be damaged due to the squeezing of excessive first heat-conducting fluid 20.

[0046] The volume of the second heat-conducting cavity 5 is reduced, and part of the second heat-conducting fluid 19 in the second expansion bag 14 flows back into the second heat-conducting cavity 5. When the volume of the second heat-conducting cavity 5 is increased, the amount of the second heat-conducting fluid 19 flowing back increases, so that the heat can be further exchanged with the second heat-conducting fluid 19 and dissipated, thereby achieving heat dispersion and avoiding overheating in the second heat-conducting cavity 5.

[0047] When the system reaches a thermal equilibrium state, that is, the temperature remains stable, the bimetallic strip 21 stops deforming, and the second partition 18 also stops sliding. The heat is continuously dissipated through the heat dissipation layer 4. When the heat exchange in the heat dissipation pipe 2 ends, the temperature in the heat dissipation layer 4 decreases, and the deformation of the bimetallic strip 21 is reset. At this time, the first expansion bag 16 squeezed by the first heat transfer fluid 20 will gradually squeeze the first heat transfer fluid 20 inside back into the first heat transfer cavity 6 after reaching the elastic deformation limit, and then push the second partition 18 to move toward the second heat transfer cavity 5, so as to reset the second partition 18 and prepare for the next heat transfer cycle. This adaptive adjustment mechanism ensures that the heat exchanger can operate continuously and efficiently.

[0048] Since the working medium has different heat during phase change in the heat dissipation pipe 2, several heat dissipation layers 4 are set so that the temperature of the heat dissipation pipe 2 connected to each heat dissipation layer 4 can be individually adjusted and zoned for heat dissipation, so that the heat dissipation wall 22 can achieve a self-adaptive effect of uniform heat dissipation.

[0049] Embodiment 2:

[0050] The difference from the above embodiment is that the Figure 1 and Figure 3As shown: the heat insulation plate 3 separates the heat exchange frame 1 into three layers from top to bottom, the heat dissipation pipeline 2 includes a first pipeline 7, a second pipeline 9 and a third pipeline 11, the first pipeline 7, the second pipeline 9 and the third pipeline 11 are respectively located inside the three layers of the heat insulation frame, the first pipeline 7 is connected to the inlet 23, the third pipeline 11 is connected to the outlet 24, and one end of the first pipeline 7 near the inlet 23 is bolted to the air valve 12.

[0051] A first elbow 8 is connected between the end of the first pipe 7 away from the inlet 23 and the second pipe 9 . A spiral fin 26 is welded around the first elbow 8 . A plurality of low-fin high-fins 25 are welded around the first pipe 7 .

[0052] The end of the second pipe 9 away from the first elbow 8 is connected to the second elbow 10 located at the end of the third pipe 11 away from the outlet 24. A plurality of spiral fins 26 are welded around the second elbow 10, a plurality of wavy fins 27 are welded around the second pipe 9, and a plurality of wavy fins 27 are welded around the third pipe 11. The first pipe 7, the first elbow 8, the second pipe 9, the second elbow 10 and the third pipe 11 together form a compactly arranged meandering pipe, which reduces the space occupied by the phase change heat exchanger.

[0053] The specific implementation process is as follows: During the conversion process from gas to liquid in the phase change heat exchanger, the gas enters the first pipe 7 from the inlet 23. At this time, the first pipe 7 is mostly gas. The low fin design reduces the flow resistance of the gaseous medium in the pipe, allowing the medium to flow smoothly, while the high fin significantly increases the heat exchange area, making the heat exchange between the medium and the pipe wall more sufficient. The low fin high fin 25 not only ensures the flow efficiency of the gas, but also improves the heat exchange efficiency; since there is no insulation layer at the first bend 8, the heat exchange is more direct, and the spiral fin 26 guides the gas medium in the first bend 8 to form a spiral flow, which increases the contact time and area between the medium and the fin, thereby significantly improving the heat exchange efficiency.

[0054] As the gaseous medium enters the second pipe 9, the gas is partially condensed into liquid during the heat exchange process with the phase change material. At this time, the second pipe 9 is mostly in a gas-liquid mixed state. The wavy fins 27 can produce a complex flow pattern, promote the mixing and heat transfer between the gas and liquid phases, so that heat can be more effectively transferred from the gas to the liquid, thereby improving the overall heat exchange efficiency. The second elbow 10 is similar to the first elbow 8, and the spiral fins 26 in the second elbow 10 also enhance the heat exchange of the medium during the turning process. Especially when the gas and liquid phases coexist, the spiral flow is conducive to gas-liquid mixing and heat transfer, further improving the heat exchange efficiency.

[0055] Most of the third pipe 11 is liquid medium. The wave fins 27 can increase the turbulence of the liquid medium and improve the heat exchange efficiency between the liquid medium and the pipe wall. At the same time, the wave fins 27 can also slow down the flow rate of the medium to a certain extent, prolong the residence time of the liquid medium in the pipe, thereby increasing the heat exchange time, so that the heat can be more fully transferred to the phase change material.

[0056] By arranging different types of fins in different pipes, the structure of the heat dissipation pipe 2 not only enhances the heat exchange efficiency, but also promotes the conversion of gaseous medium to liquid medium. In particular, in the second pipe 9, the wave fins 27 facilitate the mixing and heat transfer of the gas-liquid two phases, accelerating the condensation process of the gaseous medium. And the efficient heat exchange performance means that the system can complete the heat exchange process in a shorter time, thereby reducing energy consumption.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0058] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A phase change heat dissipation device with uniform heat dissipation, characterized in that: The invention comprises a heat exchange frame (1), a heat dissipation pipe (2) and two heat insulation plates (3), wherein the heat insulation plates (3) are fixedly connected to the heat exchange frame (1), the two ends of the heat dissipation pipe (2) respectively pass through the heat insulation plates (3) and extend to the upper part and the lower part of the heat exchange frame (1), and the two ends of the heat dissipation pipe (2) are respectively provided with an inlet (23) and an outlet (24), a heat dissipation wall (22) is sleeved on the heat dissipation pipe (2), a plurality of adjacent heat dissipation layers (4) are arranged in the heat dissipation wall (22), each heat dissipation layer (4) is provided with a cavity inside, a first partition plate (17) is fixedly connected in the cavity, the first partition plate (17) divides the cavity into a driving cavity and a fluid cavity, and a second partition plate (18) is slidably connected to the side wall of the heat dissipation layer (4) ), and the second partition (18) is slidably connected to the first partition (17), the second partition (18) divides the fluid cavity into a second heat conduction cavity (5) and a first heat conduction cavity (6), a third partition (28) is fixedly connected between the side of the first partition (17) away from the second partition (18) and the side wall of the driving cavity, the third partition (28) divides the driving cavity into a first expansion cavity (15) and a second expansion cavity (13), a first expansion capsule (16) is arranged in the first expansion cavity (15), one side of the first heat conduction cavity (6) is communicated with the first expansion capsule (16), a second expansion capsule (14) is arranged in the second expansion cavity (13), one side of the second heat conduction cavity (5) is communicated with the second expansion capsule (14); One side of the first heat conduction cavity (6) and the first expansion cavity (15) are both close to the outer wall of the heat dissipation pipe (2); a plurality of bimetallic strips (21) are provided on one side of the second partition plate (18) close to the second heat conduction cavity (5); active layers of the bimetallic strips (21) are fixedly connected to the second partition plate (18); passive layers of the bimetallic strips (21) are fixedly connected to the side wall of the second heat conduction cavity (5); a first heat conduction fluid (20) is provided in the first heat conduction cavity (6); a second heat conduction fluid (19) is provided in the second heat conduction cavity (5); and a thermal conductivity coefficient of the first heat conduction fluid (20) is higher than a thermal conductivity coefficient of the second heat conduction fluid (19).

2. The phase change heat dissipation device according to claim 1 is characterized in that: The heat insulation plate (3) divides the heat exchange frame (1) into three layers from top to bottom. The heat dissipation pipeline (2) comprises a first pipeline (7), a second pipeline (9) and a third pipeline (11). The first pipeline (7), the second pipeline (9) and the third pipeline (11) are respectively located inside the three layers of the heat insulation frame. The first pipeline (7) is connected to the inlet (23), and the third pipeline (11) is connected to the outlet (24).

3. The phase change heat dissipation device according to claim 2 is characterized in that: One end of the first pipeline (7) close to the inlet (23) is fixedly connected to a gas valve (12).

4. The phase change heat dissipation device according to claim 3 is characterized in that: A plurality of sealing strips are fixedly connected to the outer side wall of the heat exchange frame (1).

5. The phase change heat dissipation device according to claim 4 is characterized in that: The heat insulation panels (3) are all made of aerogel.

6. The phase change heat dissipation device according to claim 5, characterized in that: The heat dissipation layer (4) outside the second heat conduction cavity (5) is fixedly connected with straight fins, and the heat dissipation layer (4) outside the first heat conduction cavity (6) is fixedly connected with serrated fins.

7. The phase change heat dissipation device according to claim 6, characterized in that: A first curved pipe (8) is connected between the end of the first pipe (7) away from the inlet (23) and the second pipe (9), a spiral fin (26) is fixedly connected around the first curved pipe (8), and a plurality of low-fin high-fins (25) are fixedly connected around the first pipe (7).

8. The phase change heat dissipation device according to claim 7, characterized in that: The end of the second pipe (9) away from the first curved pipe (8) is connected to a second curved pipe (10) located at the end of the third pipe (11) away from the outlet (24); a plurality of spiral fins (26) are fixedly connected around the second curved pipe (10); a plurality of wavy fins (27) are fixedly connected around the second pipe (9); the first pipe (7), the first curved pipe (8), the second pipe (9), the second curved pipe (10) and the third pipe (11) together form a serpentine pipe.

9. The phase change heat dissipation device with uniform heat dissipation according to claim 8, characterized in that: A plurality of corrugated fins (27) are fixedly connected around the third pipe (11).

10. The phase change heat dissipation device according to claim 9, characterized in that: A plurality of springs are fixedly connected between the outer shells and inner walls of the first expansion bladder (16) and the second expansion bladder (14).

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