Dividing wall type heat exchanger and refrigerating system

Abstract

The invention relates to the field of liquid helium temperature zone refrigeration, and provides a dividing wall type heat exchanger and a refrigeration system.The dividing wall type heat exchanger comprises a first heat exchange channel and a second heat exchange channel which exchange heat with each other, the first heat exchange channel is used for allowing a high-temperature heat exchange medium to pass through, and the second heat exchange channel is used for allowing a low-temperature heat exchange medium to pass through; the net-shaped structure is arranged in the first heat exchange channel and the second heat exchange channel, the net-shaped structure is connected with the wall face of the first heat exchange channel and the wall face of the second heat exchange channel, the net-shaped structure is provided with circulation holes allowing heat exchange media to pass through, and the net-shaped structure is perpendicular to the length direction of the first heat exchange channel and the length direction of the second heat exchange channel. According to the arrangement, the net-shaped structure is transversely arranged in the heat exchange flow channel, the edge of the net-shaped structure is directly connected with the wall face of the heat exchange flow channel, and therefore the radial heat conduction area of the heat exchanger is greatly increased, heat exchange between high-temperature fluid and low-temperature fluid is facilitated, and the heat exchange efficiency and the heat exchange performance of the heat exchanger are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid helium temperature zone refrigeration, and in particular to a partition-type heat exchanger and a refrigeration system. Background Art

[0002] With the rapid development of science and technology, more and more fields such as space exploration, cryogenic electronics, cryogenic physics, superconductivity, medical equipment, etc. require a deep low-temperature working environment to ensure that the working equipment has a high working performance. Therefore, 4K temperature zone refrigeration technology has developed rapidly.

[0003] The main cooling methods for the 4K temperature zone (i.e., liquid helium temperature zone) are Dewar and mechanical refrigerator. Dewar has high reliability and mature application, and was widely used in the early days. However, Dewar has a large volume and mass, so its application is limited. Mechanical refrigerators have a compact structure, a wide refrigeration temperature range, flexible installation, and a long service life. They are widely used in many fields. Common mechanical refrigerators include JT refrigerators (also known as throttling refrigerators), reverse Brayton refrigerators, Stirling refrigerators, pulse tube refrigerators, and GM refrigerators. Among them, in the liquid helium temperature zone, the isenthalpic throttling effect of He-4 working fluid is close to the isentropic expansion effect. The JT refrigerator uses this feature to achieve a higher refrigeration efficiency.

[0004] A typical pre-cooling JT refrigeration cycle consists of a throttling core unit and a pre-cooling unit. For example, the throttling core unit comprises a three-stage heat exchanger, a throttle valve, and an evaporator. The pre-cooling unit uses a GM refrigerator to pre-cool the helium in two stages. During operation, the high-temperature, high-pressure helium passes through the primary heat exchanger, the primary pre-cooling heat exchanger, the secondary heat exchanger, the secondary pre-cooling heat exchanger, and the tertiary heat exchanger, cooling it down to below the transition temperature. The high-pressure, low-temperature gas then passes through the JT valve, isenthalpic throttling it into a low-temperature, low-pressure two-phase flow. In the evaporator, it absorbs heat and transforms into low-temperature, low-pressure saturated steam. The steam then passes through the low-pressure channels of the three heat exchangers, pre-cooling the high-pressure channel and converting it into normal-temperature, low-pressure gas before entering the compressor for compression, repeating the cycle.

[0005] In the entire JT refrigeration system, the heat exchanger is an important component, which is used to complete the heat exchange between high-pressure and high-temperature gas and low-pressure and low-temperature return gas, so as to cool the high-temperature and high-pressure gas and recover the coldness of the low-temperature and low-pressure gas. Common heat exchangers include direct contact heat exchangers, energy storage heat exchangers, partition heat exchangers, etc. JT refrigeration system usually adopts partition heat exchanger, which is characterized by the cold and hot fluids separated by a solid wall, not mixing, and heat exchange is carried out through the partition. If the working fluid flow is arranged in the opposite direction, it is a countercurrent heat exchanger. Among the partition heat exchangers, according to their different structures, they can be divided into shell and tube heat exchangers, plate heat exchangers, shell and tube heat exchangers, etc. The first two are more common and the most widely used.

[0006] However, the applicant has found that the existing partitioning heat exchanger has at least the following problems:

[0007] In a partition-type heat exchanger, hot and cold fluids exchange heat through the wall. Due to the large temperature difference between the outlet and inlet of the heat exchanger, axial heat leakage will occur on the solid wall, resulting in reduced heat exchanger efficiency and affecting the performance of the heat exchanger. Summary of the Invention

[0008] The object of the present invention is to provide a partition-type heat exchanger and a refrigeration system to solve the defects and deficiencies in the prior art.

[0009] In order to achieve the above object, the present invention provides a partitioning heat exchanger, comprising:

[0010] A first heat exchange channel and a second heat exchange channel for exchanging heat with each other, wherein the first heat exchange channel is used for allowing a high-temperature heat exchange medium to pass through, and the second heat exchange channel is used for allowing a low-temperature heat exchange medium to pass through;

[0011] A mesh structure is arranged in the first heat exchange channel and the second heat exchange channel, the mesh structure is connected to the wall surfaces of the first heat exchange channel and the second heat exchange channel, the mesh structure is provided with flow holes for heat exchange medium to pass through, and the mesh structure is perpendicular to the length direction of the first heat exchange channel and the second heat exchange channel.

[0012] According to the partition-type heat exchanger provided by the present invention, the mesh structure is provided in at least two layers, and the mesh structure in each layer is spaced apart along the length direction of the first heat exchange channel and the second heat exchange channel.

[0013] According to the partition-type heat exchanger provided by the present invention, the circulation holes are provided in plurality, and the plurality of circulation holes are distributed in an array on the mesh structure.

[0014] According to the partition wall heat exchanger provided by the present invention, the partition wall heat exchanger is processed by an additive manufacturing method.

[0015] The partitioning wall heat exchanger provided by the present invention further includes:

[0016] a first pipeline, wherein the first heat exchange channel is formed inside the pipeline;

[0017] The second pipeline is sleeved outside the first pipeline, and the second heat exchange channel is formed between the inner wall of the second pipeline and the outer wall of the first pipeline.

[0018] According to the partitioning heat exchanger provided by the present invention, at least two first pipelines are provided, and the first pipelines are spaced apart and distributed around the axis of the second pipeline.

[0019] The partitioning wall heat exchanger provided by the present invention further includes:

[0020] a housing having a hollow chamber therein;

[0021] A partition is provided in the shell, the partition is provided along the length direction of the shell, and the partition is used to divide the hollow chamber into the first heat exchange channel and the second heat exchange channel which are independent of each other.

[0022] According to the partition-type heat exchanger provided by the present invention, the partition plates are provided in plurality, and the plurality of partition plates are distributed at intervals along the width direction of the shell to form a plurality of the first heat exchange channels and the second heat exchange channels.

[0023] According to the partitioning wall heat exchanger provided by the present invention, the plurality of first heat exchange channels and the plurality of second heat exchange channels are alternately arranged in sequence along the width direction of the shell.

[0024] The present invention also provides a refrigeration system, comprising the partitioning heat exchanger as described in any one of the above items.

[0025] The partition-wall heat exchanger provided by the present invention includes: a first heat exchange channel and a second heat exchange channel for mutually exchanging heat, the first heat exchange channel being used to allow a high-temperature heat exchange medium to pass through, and the second heat exchange channel being used to allow a low-temperature heat exchange medium to pass through; a mesh structure disposed in the first heat exchange channel and the second heat exchange channel, the mesh structure being connected to the walls of both the first heat exchange channel and the second heat exchange channel, the mesh structure being provided with flow holes for the heat exchange medium to pass through, and the mesh structure being perpendicular to the length direction of the first heat exchange channel and the second heat exchange channel. In this arrangement, the mesh structure is arranged horizontally in the heat exchange channel, and the edges of the mesh structure are directly connected to the walls of the heat exchange channel, thereby greatly increasing the radial heat conduction area of ​​the heat exchanger, facilitating heat exchange between the high-temperature fluid and the low-temperature fluid, improving the heat exchange efficiency of the heat exchanger, and enhancing the heat exchange performance of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 1 is a schematic structural diagram of a partitioning heat exchanger provided in an embodiment of the present invention;

[0028] Figure 2 is a top view of a partitioning heat exchanger provided by an embodiment of the present invention;

[0029] Figure 3Schematic diagram of the internal structure of a partitioning heat exchanger provided in an embodiment of the present invention;

[0030] Figure 4 1 is a structural schematic diagram of a partitioning heat exchanger provided in another embodiment of the present invention;

[0031] Figure 5 1 is a schematic diagram of the internal structure of a partitioning heat exchanger provided in another embodiment of the present invention;

[0032] Reference numerals:

[0033] 1: First heat exchange channel; 2: Second heat exchange channel; 3: Reticulated structure; 4: Flow hole; 5: First pipeline; 6: Second pipeline; 7: Shell; 8: Partition. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0037] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0038] Please refer to Figures 1 to 5As shown, an embodiment of the present invention provides a partition wall heat exchanger, comprising a first heat exchange channel 1, a second heat exchange channel 2, and a mesh structure 3. Specifically, the first heat exchange channel 1 is used for passing a high-temperature heat exchange medium, and the second heat exchange channel 2 is used for passing a low-temperature heat exchange medium. The heat exchange medium in the first heat exchange channel 1 and the second heat exchange channel 2 exchanges heat through the channel wall. For example, the heat exchange medium can be liquid helium, etc. Figure 2 As shown, the mesh structure 3 is arranged in the first heat exchange channel 1 and the second heat exchange channel 2, and the mesh structure 3 is connected to the wall surface of the first heat exchange channel 1 and the second heat exchange channel 2. The mesh structure 3 is provided with a flow hole 4 for the heat exchange medium to pass through, so as to ensure that the heat exchange medium can pass through smoothly. Figure 3 As shown, the mesh structure 3 is perpendicular to the length direction of the first heat exchange channel 1 and the second heat exchange channel 2. Figure 3 As for the placement of the partition-type heat exchanger shown in the figure, the direction indicated by the solid arrow in the figure is the length direction of the heat exchange channel.

[0039] In this way, when the fluid passes through these channels, it exchanges heat with the mesh structure 3, thereby achieving efficient heat transfer and transfer, providing more lateral heat exchange area, increasing heat exchange efficiency, and enhancing the heat exchange effect. In addition, the setting of the mesh structure 3 can also provide additional support for the channel and increase its structural stability. Especially in high pressure or high temperature environments, this structural design can help resist external stress and reduce the risk of channel deformation or damage. It is understandable that the specific shape and material of the mesh structure 3 can be designed according to actual needs. It can be made of metal, plastic or other materials with good thermal conductivity. Parameters such as the mesh size, wire diameter and thickness of the mesh structure 3 can also be adjusted according to actual needs to meet specific heat exchange requirements.

[0040] This arrangement, with the mesh structure 3 arranged horizontally within the heat exchange channel and its edges directly connected to the channel walls, significantly increases the radial heat transfer area of ​​the heat exchanger, facilitating heat exchange between high-temperature and low-temperature fluids, improving the heat exchange efficiency and performance. Furthermore, while maintaining the same heat exchange requirements, the heat exchanger's volume and mass can be reduced to a certain extent, resulting in a more compact structure, reduced mass, and a smaller footprint, adapting to various usage scenarios.

[0041] In the embodiment of the present invention, the mesh structure 3 is provided with at least two layers, such as Figure 3As shown, the layers of the mesh structure 3 are spaced apart along the length of the first heat exchange channel 1 and the second heat exchange channel 2. This arrangement utilizes a layered mesh structure 3 perpendicular to the incoming flow direction, with the layers not in contact with each other, connected only to the walls of the heat exchange channels. This significantly increases the radial heat transfer area, facilitates heat exchange between high-temperature and low-temperature fluids, improves the heat exchange efficiency of the heat exchanger, and can also reduce the volume and mass of the heat exchanger to a certain extent. It should be noted that the number of layers of the mesh structure 3 can be adjusted according to actual needs to meet specific heat exchange requirements.

[0042] As an optional embodiment of the present invention, the flow holes 4 are provided in a plurality, and the plurality of flow holes 4 are distributed in an array on the mesh structure 3. For example, Figure 2 As shown, the circulation holes 4 are arranged in a hexagonal shape to form a hexagonal mesh structure. With this arrangement, a plurality of circulation holes 4 distributed in an array are arranged on the mesh structure 3, which is convenient for processing and manufacturing, and can allow the fluid to pass through the mesh structure 3 more smoothly, thereby improving the overall heat exchange efficiency. Through the array-distributed circulation holes 4, heat can be more evenly distributed on the mesh structure 3, which helps to reduce temperature gradients and thermal stresses and improve the stability and reliability of the heat exchange system. It is understandable that the array distribution of the circulation holes 4 can be flexibly adjusted according to actual needs. By changing the size, shape and spacing of the circulation holes 4, the mechanical properties and heat exchange performance of the mesh structure 3 can be optimized to meet specific application requirements.

[0043] In a specific embodiment of the present invention, the partition-type heat exchanger is processed by an additive manufacturing method. Additive manufacturing is also commonly referred to as 3D printing, which is completely different from the traditional manufacturing method of cutting or removing materials. The core concept of additive manufacturing is to gradually build a three-dimensional object by stacking or adding materials layer by layer, rather than cutting or removing materials from a block of material to obtain the desired shape. The core idea of ​​this process can be simplified as "addition rather than removal". In this way, the production of the partition-type heat exchanger through additive manufacturing can effectively solve the manufacturing problem of its complex internal structure, and the one-piece molding process is low in difficulty, which can make the complex layered mesh structure fully contact with the wall of the heat exchange channel, reduce the requirements for the processing technology of the partition-type heat exchanger, quickly process and form complex components, shorten the research and development cycle, and improve material utilization.

[0044] In some embodiments of the present invention, the partitioning heat exchanger further includes a first pipe 5 and a second pipe 6. Specifically, Figure 1 As shown, the first heat exchange channel 1 is formed inside the first pipeline 5 for the circulation of high-temperature heat exchange medium. The second pipeline 6 is sleeved outside the first pipeline 5, and the second heat exchange channel 2 is formed between the inner wall of the second pipeline 6 and the outer wall of the first pipeline 5 for the circulation of low-temperature heat exchange medium. Figure 3As shown, the first pipeline 5 and the second pipeline 6 are both provided with a mesh structure 3. The mesh structure 3 is arranged along the radial direction of the pipeline and perpendicular to the axial direction of the pipeline, i.e., the incoming flow direction. Figure 1 and Figure 3 As for the placement of the partition-type heat exchanger shown in the figure, the direction indicated by the solid arrow in the figure is the axial direction of the pipeline and the incoming flow direction. In this way, an inner and outer outer tube structure is formed by pipelines of different diameters. The high-temperature fluid flows inside the inner tube, and the low-temperature fluid flows through the annular gap between the inner and outer tubes. The mesh structure 3 is arranged radially, thereby increasing its heat transfer coefficient and improving heat exchange efficiency. The heat exchanger has a simple structure and can withstand high pressures. It is suitable for various high-pressure application scenarios. Its installation and maintenance are also relatively convenient, reducing the trouble and cost during use. In addition, in the partition-type heat exchanger of this embodiment, the high-temperature fluid and the low-temperature fluid can exchange heat in a pure countercurrent manner, so that its logarithmic mean driving force is large, which improves the heat exchange efficiency.

[0045] In an optional embodiment of the present invention, as Figure 1 As shown, there are at least two first pipelines 5, and each first pipeline 5 is spaced apart around the axis of the second pipeline 6. Figure 1 As for the placement of the partition-type heat exchanger shown, the direction indicated by the solid arrow in the figure is the axial direction of the second pipeline 6. With this arrangement, each first pipeline 5 can provide an independent circulation channel for the high-temperature heat exchange medium, avoiding problems such as blockage or uneven flow of the fluid that may occur in a single pipeline. And by increasing the number of first pipelines 5, the total heat exchange area of ​​the heat exchanger can be significantly increased, which helps to improve the efficiency of heat transfer, so that more heat can be transferred between the high-temperature medium and the low-temperature medium. The simultaneous operation of multiple heat exchange channels can significantly improve the overall heat exchange efficiency and meet the needs of rapid heat exchange. It can be understood that the number and distribution of the first pipelines 5 can be adjusted according to actual needs to adapt to different heat exchange requirements and fluid characteristics, so that the heat exchanger can flexibly adapt to various complex application scenarios and improve the versatility and practicality of the equipment.

[0046] In other embodiments of the present invention, Figure 4 As shown, the partition wall heat exchanger also includes a shell 7 and a partition 8. Specifically, as Figure 4 As shown, the shell 7 can be designed as a rectangular parallelepiped structure, with inlet and outlet pipes for heat exchange medium to enter and exit the shell at both ends. Figure 5 As shown, the interior of the shell 7 has a hollow chamber, and a partition 8 is provided in the shell 7. The partition 8 is provided along the length direction of the shell 7, and is used to divide the hollow chamber into a first heat exchange channel 1 and a second heat exchange channel 2 that are independent of each other. Figure 4 and Figure 5In the placement of the partition-type heat exchanger shown, the direction indicated by the solid arrow in the figure is the length of the shell 7. This arrangement separates the different fluids through the partition 8, allowing heat to be transferred from one fluid to another. This ensures that the different fluids do not mix during the heat exchange process and that heat is transferred through the partition 8, thereby achieving efficient heat exchange. The regular appearance and structure of the heat exchanger facilitate manufacturing and installation.

[0047] As an optional embodiment of the present invention, Figure 5 As shown, the partitions 8 are provided in plurality, and the plurality of partitions 8 are spaced apart and distributed along the width direction of the shell 7 to form a plurality of first heat exchange channels 1 and second heat exchange channels 2. Figure 4 and Figure 5 In the placement of the partition-type heat exchanger shown, the direction indicated by the hollow arrow in the figure is the width of the shell 7. This arrangement allows the volume and shape of the first heat exchange channel 1 and the second heat exchange channel 2 to be flexibly changed by adjusting the position and number of the partitions 8, thereby flexibly adapting to different heat exchange requirements and fluid characteristics, making the partition-type heat exchanger suitable for a wide range of application scenarios.

[0048] In a specific embodiment of the present invention, a plurality of first heat exchange channels 1 and second heat exchange channels 2 are alternately arranged in sequence along the width direction of the shell 7. Such an arrangement, in which high-pressure pipes and low-pressure pipes are alternately arranged, is conducive to improving the heat exchange and heat transfer efficiency of the heat exchanger. In addition, Figure 5 As shown, the cross-sectional areas of the first heat exchange channel 1 and the second heat exchange channel 2 are different, that is, the cross-sectional areas of the high-pressure and low-pressure channels are different. Generally, the cross-sectional area of ​​the first heat exchange channel 1 is smaller than that of the second heat exchange channel 2. This is because the pressure and density of the high-pressure fluid are high. In order to make the fluid velocities on both sides of the heat exchange wall similar, at the same mass flow rate, the cross-sectional area of ​​the high-pressure flow channel is small and the cross-sectional area of ​​the low-pressure flow channel is large, which is conducive to the heat exchange between the high-pressure and low-pressure fluids. It should be noted that, as shown in FIG. Figure 5 For the placement of the partition-type heat exchanger shown in the figure, the cross section obtained by the plane along the direction indicated by the hollow arrow in the figure intersecting the shell 7 perpendicularly is the cross section of the heat exchange channel.

[0049] In summary, the embodiment of the present invention provides a novel partition-type heat exchanger, which specifically includes a first heat exchange channel 1, a second heat exchange channel 2, and a mesh structure 3 disposed in the channel. Figures 1 to 5, multiple layers of mesh hexagonal structures are arranged in the heat exchanger flow channel, and the mesh structure 3 is perpendicular to the fluid flow direction. There is no direct contact between the layers of mesh structure 3, and the edge of the mesh structure 3 is directly connected to the wall of the heat exchanger flow channel. When the fluid passes through the flow channel, the heat is transferred to the mesh structure 3, and then transferred to the wall of the heat exchanger flow channel through the mesh structure 3, thereby greatly increasing the radial heat transfer area of ​​the heat exchanger, enhancing radial heat exchange, that is, heat exchange between cold and hot fluids, reducing axial heat exchange, and improving the heat exchange efficiency of the heat exchanger. Considering the influence of the mesh structure 3 on flow resistance, the number of layers should not be too many. In addition, the high and low pressure channels can be arranged alternately in sequence to improve the heat transfer efficiency of the heat exchanger.

[0050] The addition of mesh structure 3 complicates the flow channel structure, and mesh structure 3 must be in full contact with the heat exchanger flow channel wall to achieve the effect of increasing the heat exchange area. This places high demands on the heat exchanger's processing technology. Therefore, in order to better complete the production of the heat exchanger, an additive manufacturing method is used to integrate the entire heat exchanger into a single piece. This fully meets the processing requirements of the complex flow channel and reduces the processing requirements for the heat exchanger. The integrated structure of the entire heat exchanger ensures sufficient heat exchange. Its overall design is simple, easy to process, and significantly improves heat exchange efficiency.

[0051] The refrigeration system provided by the present invention is described below. The refrigeration system described below and the partitioning heat exchanger described above can be referred to each other.

[0052] An embodiment of the present invention also provides a refrigeration system, for example, suitable for a JT refrigeration cycle system, including a partition-type heat exchanger as described in each of the above embodiments. In this arrangement, a mesh structure 3 is arranged horizontally in the heat exchange channel, and the edge of the mesh structure 3 is directly connected to the wall of the heat exchange channel, thereby greatly increasing the radial heat conduction area of ​​the heat exchanger, facilitating heat exchange between high-temperature fluid and low-temperature fluid, improving the heat exchange efficiency of the heat exchanger, and improving the heat exchange performance of the heat exchanger. At the same time, under the same heat exchange requirements, the volume and mass of the heat exchanger can be reduced to a certain extent, making the structure more compact, smaller in mass, and smaller in area, so as to adapt to different usage scenarios. The derivation process of this beneficial effect is roughly similar to the derivation process of the beneficial effect of the partition-type heat exchanger described above, so it will not be repeated here.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A partition wall heat exchanger, characterized in that: include: A first heat exchange channel (1) and a second heat exchange channel (2) for mutually exchanging heat, wherein the first heat exchange channel (1) is used for allowing a high-temperature heat exchange medium to pass through, and the second heat exchange channel (2) is used for allowing a low-temperature heat exchange medium to pass through; A mesh structure (3) is provided in the first heat exchange channel (1) and the second heat exchange channel (2); the mesh structure (3) is connected to the walls of the first heat exchange channel (1) and the second heat exchange channel (2); the mesh structure (3) is provided with flow holes (4) for heat exchange medium to pass through, and the mesh structure (3) is perpendicular to the length direction of the first heat exchange channel (1) and the second heat exchange channel (2).

2. The partition wall heat exchanger according to claim 1, characterized in that: The mesh structure (3) is provided in at least two layers, and each layer of the mesh structure (3) is distributed at intervals along the length direction of the first heat exchange channel (1) and the second heat exchange channel (2).

3. The partitioning heat exchanger according to claim 1, characterized in that The circulation holes (4) are provided in a plurality, and the plurality of circulation holes (4) are distributed in an array on the mesh structure (3).

4. The partitioning heat exchanger according to claim 1, characterized in that The partitioning heat exchanger is manufactured by an additive manufacturing method.

5. The partition wall heat exchanger according to any one of claims 1 to 4, characterized in that: Also includes: a first pipeline (5), the first heat exchange channel (1) being formed therein; The second pipeline (6) is sleeved outside the first pipeline (5), and the second heat exchange channel (2) is formed between the inner wall of the second pipeline (6) and the outer wall of the first pipeline (5).

6. The partition wall heat exchanger according to claim 5, characterized in that: At least two first pipelines (5) are provided, and each of the first pipelines (5) is distributed at intervals around the axis of the second pipeline (6).

7. The partitioning heat exchanger according to any one of claims 1 to 4, characterized in that: Also includes: a housing (7) having a hollow chamber therein; A partition (8) is arranged in the shell (7), and the partition (8) is arranged along the length direction of the shell (7). The partition (8) is used to divide the hollow chamber into the first heat exchange channel (1) and the second heat exchange channel (2) which are independent of each other.

8. The partitioning heat exchanger according to claim 7, characterized in that The partition plates (8) are provided in plurality, and the plurality of partition plates (8) are distributed at intervals along the width direction of the shell (7) to form a plurality of the first heat exchange channels (1) and the second heat exchange channels (2).

9. The partitioning heat exchanger according to claim 8, characterized in that A plurality of the first heat exchange channels (1) and the second heat exchange channels (2) are alternately arranged in sequence along the width direction of the shell (7).

10. A refrigeration system, characterized in that: The invention comprises a partitioning heat exchanger according to any one of claims 1 to 9.

Images