Heat exchange fin structure and plate-fin heat exchanger

Abstract

The present invention provides a heat exchange fin structure and a plate-fin heat exchanger, wherein the heat exchange fin structure includes a partition and a plurality of fin units spaced apart on the partition, the fin units including three-dimensional ribs and three-dimensional fins, the interior of the three-dimensional fins having a flow channel for circulating a heat exchange medium, the three-dimensional fins and the three-dimensional ribs being spaced apart, and at least a portion of the three-dimensional ribs blocking a portion of the flow channel to disturb the circulating heat exchange medium; wherein the central axes of the flow channels of at least a portion of the plurality of fin units coincide to form a row of three-dimensional fins, and the heat exchange medium can sequentially pass through the plurality of fin units in the three-dimensional fin row for heat exchange. The present invention can be used on plate-fin heat exchangers. Compared with existing continuous zigzag fins, the plate-fin heat exchanger using the heat exchange fin structure proposed by the present invention has a smaller overall weight and better comprehensive heat exchange performance, making it suitable for large-scale promotion and use.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange equipment, and in particular to a heat exchange fin structure and a plate-fin heat exchanger. Background Art

[0002] At present, plate-fin heat exchangers are favored by various fields such as automobiles, electronics, aviation, aerospace, and air conditioning due to their many advantages such as high heat transfer coefficient, compact structure, and light weight. However, with the continuous development and progress of these fields, the number of integrated components per unit area in each system in these fields continues to increase, which will not only cause the heat flux density of the entire system to rise sharply, but also cause the weight of the entire system to increase. Starting from the heat exchanger, increasing the heat transfer performance of the heat exchanger while reducing the weight of the heat exchanger has become an important research goal. The fin structure, as the main component of the plate-fin heat exchanger, directly affects the heat transfer performance and weight of the entire heat exchanger. Therefore, increasing the heat transfer performance of the fin and reducing the weight of the fin have become important entry points for research.

[0003] Although increasing the contact area between the fins and the fluid can effectively enhance the heat transfer performance, it often leads to an increase in flow resistance, thereby reducing the overall heat transfer performance and increasing the weight. However, changing the fin structure to change the fluid flow pattern and enhance the fluid disturbance can not only increase the overall heat transfer performance but also reduce the weight.

[0004] In the prior art, there are some fin structures used in plate-fin heat exchangers. For example, patent CN201420673284.6 proposes a new type of slit fin for plate-fin heat exchanger, which consists of straight fins and 1 / 2 teardrop-shaped inclusions. When the fluid flows through or enters the inclusions, a strong secondary flow enhancement disturbance is generated, which thins the boundary layer, increases the temperature gradient, and improves its overall performance. However, the inclusions on the fins are difficult to process and will increase the weight of the fins.

[0005] For example, patent CN201921103474.3 has protrusions on both sides of the fin flow channel facing the outside and inside of the fin flow channel. When the fluid flows through the protrusion structure, the thermal boundary layer of the fluid is destroyed, and the fluid is diverted along the two sides of the protrusion, increasing the fluid disturbance inside the flow channel to enhance the convective heat transfer performance between the fluid and the fin. However, the stability of this type of fin will be reduced, and the weight of the fin cannot be reduced. It is also prone to dust accumulation, so it has limitations on fluid media.

[0006] like Figure 1 and Figure 2 As shown, a zigzag fin structure is commonly found on plate-fin heat exchangers in the prior art. This fin structure is a straight fin, which is heavy overall and has unsatisfactory heat transfer performance per unit weight. In summary, the heat transfer fins on existing plate-fin heat exchangers have the problems of poor heat transfer performance and heavy weight. Summary of the Invention

[0007] The present invention provides a heat exchange fin structure and a plate-fin heat exchanger, so as to solve the problems of poor heat exchange effect and heavy weight of the heat exchange fins on the plate-fin heat exchanger in the prior art.

[0008] In order to solve the above problems, according to one aspect of the present invention, a heat exchange fin structure is provided, comprising a partition and a plurality of fin units spaced apart on the partition, the fin units comprising three-dimensional ribs and three-dimensional fins, the interior of the three-dimensional fins having a circulation channel for circulating a heat exchange medium, the three-dimensional fins and the three-dimensional ribs being spaced apart, and at least a portion of the three-dimensional ribs blocking a portion of the circulation channel to disturb the circulating heat exchange medium; wherein the central axes of the circulation channels of at least a portion of the plurality of fin units coincide to form a row of three-dimensional fins, and the heat exchange medium can pass through the plurality of fin units in the three-dimensional fin row in sequence to perform heat exchange.

[0009] Furthermore, the circulation channel is a variable-size channel so as to change at least one of the flow rate, flow direction and pressure of the circulating heat exchange medium.

[0010] Furthermore, the inlet size of the circulation channel is smaller than the outlet size of the circulation channel to form a gradually diverging channel.

[0011] Furthermore, the three-dimensional fin includes a first fin plate, a second fin plate and a third fin plate, one end of the first fin plate and the second fin plate are respectively fixedly connected to the partition plate, and the other ends of the first fin plate and the second fin plate are respectively connected to the two ends of the third fin plate; the third fin plate is arranged parallel to the partition plate; the first fin plate and the second fin plate are spaced apart, and a flow channel is formed between the first fin plate, the second fin plate and the third fin plate.

[0012] Furthermore, the multiple three-dimensional fins in the same column of three-dimensional fins are arranged at equal intervals; the third fin plates of the multiple three-dimensional fins in the same column of three-dimensional fins are arranged in the same plane, the first fin plates of the multiple three-dimensional fins in the same column of three-dimensional fins are arranged in parallel, and the second fin plates of the multiple three-dimensional fins in the same column of three-dimensional fins are arranged in parallel.

[0013] Furthermore, there are multiple three-dimensional rib columns, and the multiple three-dimensional rib columns are arranged at intervals.

[0014] Furthermore, the three-dimensional rib column is a cylindrical rib column, one axial end of the cylindrical rib column is fixedly connected to the partition, and at least a portion of the outer circumferential surface of the cylindrical rib column blocks a portion of the flow channel; wherein, the central axis of the cylindrical rib column in multiple fin units in the same three-dimensional fin row is perpendicular to the partition.

[0015] Furthermore, the central axes of the cylindrical ribs in the multiple fin units in the same three-dimensional fin row are arranged in the same plane and are equidistantly spaced.

[0016] Furthermore, the three-dimensional rib column is a diamond-shaped rib column, one axial end of the diamond-shaped rib column is fixedly connected to the partition, and at least a portion of the outer peripheral surface of the diamond-shaped rib column blocks a portion of the flow channel; wherein, the central axis of the diamond-shaped rib column in multiple fin units in the same three-dimensional fin column is perpendicular to the partition.

[0017] Furthermore, the central axes of the diamond ribs in multiple fin units in the same three-dimensional fin row are coplanar and equidistant; the diamond ribs have a diamond cross-section perpendicular to the axial direction, and a diagonal of the diamond cross-section is parallel to or colinear with the central axis of the flow channel.

[0018] Furthermore, multiple fin units in the same three-dimensional fin column are arranged at equal intervals; there are multiple three-dimensional fin columns, and the multiple three-dimensional fin columns are arranged at equal intervals on the partition; the multiple three-dimensional fins on the partition are arranged in multiple rows and columns to form a three-dimensional fin matrix.

[0019] According to another aspect of the present invention, a plate-fin heat exchanger is provided, comprising the above-mentioned heat exchange fin structure.

[0020] Furthermore, the plate-fin heat exchanger includes a plurality of heat exchange fin structures, which are stacked in sequence to form a multi-layer heat exchange structure; the two ends of the three-dimensional rib column in a heat exchange fin structure in the multi-layer heat exchange structure are respectively connected to the partition in the same heat exchange fin structure and the partition of another adjacent heat exchange fin structure; and / or, the two ends of the three-dimensional fin in a heat exchange fin structure in the multi-layer heat exchange structure are respectively connected to the partition in the same heat exchange fin structure and the partition of another adjacent heat exchange fin structure.

[0021] Furthermore, there are two adjacent heat exchange fin structures in the multi-layer heat exchange structure, wherein the extension direction of the central axis of the flow channel in one heat exchange fin structure and the extension direction of the central axis of the flow channel in the other heat exchange fin structure form an included angle.

[0022] Furthermore, there are three heat exchange fin structures stacked in sequence in the multi-layer heat exchange structure, namely the first heat exchange fin structure, the second heat exchange fin structure and the third heat exchange fin structure, wherein the extension direction of the central axis of the circulation channel in the first heat exchange fin structure is perpendicular to the extension direction of the central axis of the circulation channel in the second heat exchange fin structure; the extension direction of the central axis of the circulation channel in the first heat exchange fin structure is parallel to the extension direction of the central axis of the circulation channel in the third heat exchange fin structure.

[0023] Applying the technical solution of the present invention, the present invention provides a heat exchange fin structure, including a partition and a plurality of fin units spaced apart on the partition, the fin unit including a three-dimensional rib column and a three-dimensional fin, the interior of the three-dimensional fin having a circulation channel for circulating a heat exchange medium, the three-dimensional fin and the three-dimensional rib column being spaced apart, and at least a portion of the three-dimensional rib column blocks a portion of the circulation channel to disturb the circulating heat exchange medium; wherein, the central axes of the circulation channels of at least a portion of the plurality of fin units coincide to form a row of three-dimensional fins, and the heat exchange medium can pass through the plurality of fin units in the three-dimensional fin column in sequence to perform heat exchange.

[0024] The present invention arranges the three-dimensional fins and the three-dimensional ribs at intervals. Compared with the continuously arranged zigzag fin structure in the prior art, the heat exchange fin structure in the present invention is lighter than the existing zigzag fin structure, and the discontinuous area between the three-dimensional fins and the three-dimensional ribs will promote the full mixing of the fluid when the heat exchange medium flows, so that the temperature distribution of the fluid in multiple flow channels is more uniform; when the heat exchange medium flows through the three-dimensional ribs as a fluid, the fluid will generate strong vortices here, resulting in a rapid increase in the local flow velocity in the discontinuous area, thereby further enhancing the degree of mixing of the local fluid in the discontinuous area, and accelerating the fluid to take away more heat from the three-dimensional ribs and the three-dimensional fins. At the same time, the strong vortices generated also impact the boundaries on both sides of the three-dimensional fins, increasing the temperature gradient, thereby enhancing the comprehensive heat exchange performance between the heat exchange medium and the three-dimensional fins; the present invention designs an intermittent fin structure with three-dimensional ribs, which can be used in plate-fin heat exchangers. Compared with the existing continuous zigzag fins, the plate-fin heat exchanger using the heat exchange fin structure proposed by the present invention has a smaller overall weight and better comprehensive heat exchange performance, and is suitable for large-scale promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 A perspective view of a zigzag fin structure in the prior art is shown;

[0027] Figure 2 The specific structural diagram of the sawtooth fin structure in the prior art is shown in a top view;

[0028] Figure 3 A perspective view of a heat exchange fin structure in which the three-dimensional rib columns provided by an embodiment of the present invention are cylindrical rib columns is shown;

[0029] Figure 4 Shown Figure 3 Schematic diagram of the specific structure from a top-down perspective;

[0030] Figure 5 A perspective view of a heat exchange fin structure in which the three-dimensional ribs provided by an embodiment of the present invention are diamond-shaped ribs is shown;

[0031] Figure 6 Shown Figure 5 Schematic diagram of the specific structure from a top-down perspective;

[0032] Figure 7 A partial structural schematic diagram of a plate-fin heat exchanger provided in the first embodiment of the present invention is shown;

[0033] Figure 8 A partial structural schematic diagram of a plate-fin heat exchanger provided in the second embodiment of the present invention is shown.

[0034] The above drawings include the following reference numerals:

[0035] 10. Partition;

[0036] 20. Fin unit; 21. Three-dimensional rib; 211. Cylindrical rib; 212. Diamond rib; 22. Three-dimensional fin; 221. First fin plate; 222. Second fin plate; 223. Third fin plate; 23. Flow channel;

[0037] 30. First heat exchange fin structure;

[0038] 40. Second heat exchange fin structure;

[0039] 50. The third heat exchange fin structure. DETAILED DESCRIPTION

[0040] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] like Figures 3 to 8As shown, an embodiment of the present invention provides a heat exchange fin structure, including a partition 10 and a plurality of fin units 20 spaced apart on the partition 10, the fin unit 20 including a three-dimensional rib column 21 and a three-dimensional fin 22, the interior of the three-dimensional fin 22 having a circulation channel 23 for circulating a heat exchange medium, the three-dimensional fin 22 and the three-dimensional rib column 21 being spaced apart, and at least a portion of the three-dimensional rib column 21 blocking a portion of the circulation channel 23 to disturb the circulating heat exchange medium; wherein, the central axes of the circulation channels 23 of at least a portion of the plurality of fin units 20 coincide to form a row of three-dimensional fins, and the heat exchange medium can pass through the plurality of fin units 20 in the three-dimensional fin column in sequence to perform heat exchange.

[0042] The present invention sets the three-dimensional fins 22 and the three-dimensional ribs 21 at intervals. Compared with the zigzag fin structure continuously set in the prior art, the heat exchange fin structure of the present invention is lighter than the existing zigzag fin structure, and the discontinuous area between the three-dimensional fins 22 and the three-dimensional ribs 21 will promote the full mixing of the fluid when the heat exchange medium flows, so that the temperature distribution of the fluid in the multiple flow channels 23 is more uniform; when the heat exchange medium flows through the three-dimensional ribs 21 as a fluid, the fluid will generate a strong vortex here, resulting in a rapid increase in the local flow velocity in the discontinuous area, thereby further enhancing the discontinuous area. The mixing degree of the local fluid in the area is increased, and the fluid is accelerated to take away more heat from the three-dimensional ribs 21 and the three-dimensional fins 22. At the same time, the strong eddy current generated also impacts the boundaries on both sides of the three-dimensional fins 22, so that the temperature gradient is increased, thereby enhancing the comprehensive heat exchange performance between the heat exchange medium and the three-dimensional fins 22; the present invention designs an intermittent fin structure with three-dimensional ribs 21, which can be used in plate-fin heat exchangers. Compared with the existing continuous zigzag fins, the plate-fin heat exchanger using the heat exchange fin structure proposed by the present invention has a smaller overall weight and better comprehensive heat exchange performance, and is suitable for large-scale promotion and use.

[0043] like Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the circulation channel 23 is a variable-size channel, which allows for the variation of at least one of the flow rate, flow direction, and pressure of the circulating heat exchange medium. By configuring the circulation channel 23 as a variable-size channel, the structure ensures effective regulation of at least one of the flow rate, flow direction, and pressure of the circulating heat exchange medium, thereby enhancing the overall heat exchange performance between the heat exchange medium and the three-dimensional fins 22.

[0044] like Figure 3 、 Figure 4 、 Figure 5 and Figure 6As shown, the inlet dimension of the circulation channel 23 is smaller than the outlet dimension of the circulation channel 23, thereby forming a gradually diverging channel. The provision of the gradually diverging channel reduces the flow velocity of the circulating heat exchange medium, further enhancing the degree of local fluid mixing within the discontinuous area, thereby improving the overall heat exchange performance between the heat exchange medium and the three-dimensional fins 22. Furthermore, compared to straight channels, the gradually diverging channel increases the heat exchange area to a certain extent, thereby enhancing the heat exchange effect.

[0045] It should be noted that: Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, in a specific embodiment of the present invention, the internal dimensions of the circulation channel 23 change at a constant rate so as to stably reduce the fluid flow rate and facilitate the processing and forming of the three-dimensional fins 22.

[0046] like Figure 3 and Figure 5 As shown, the three-dimensional fin 22 includes a first fin plate 221, a second fin plate 222, and a third fin plate 223. One end of the first fin plate 221 and the second fin plate 222 are respectively fixedly connected to the partition plate 10, and the other ends of the first fin plate 221 and the second fin plate 222 are respectively connected to the two ends of the third fin plate 223. The third fin plate 223 is arranged parallel to the partition plate 10. The first fin plate 221 and the second fin plate 222 are spaced apart, and the first fin plate 221, the second fin plate 222, and the third fin plate 223 together form a flow channel 23. This arrangement ensures that the three-dimensional fin 22 has a simple structure and is easy to process and form, while also ensuring that the three-dimensional fin 22 has sufficient structural strength, thereby ensuring operational reliability.

[0047] like Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the multiple 3D fins 22 within the same 3D fin row are arranged at equal intervals; the third fin plates 223 of the multiple 3D fins 22 within the same 3D fin row are arranged coplanarly; the first fin plates 221 of the multiple 3D fins 22 within the same 3D fin row are arranged in parallel; and the second fin plates 222 of the multiple 3D fins 22 within the same 3D fin row are arranged in parallel. This arrangement ensures smooth flow of the heat exchange medium and keeps the flow resistance within the same 3D fin row within a reasonable range.

[0048] like Figure 3 and Figure 4 As shown, there are multiple three-dimensional ribs 21, and the multiple three-dimensional ribs 21 are arranged at intervals. By providing multiple three-dimensional ribs 21, the working effect of the discontinuous area between the three-dimensional fins 22 and the three-dimensional ribs 21 is ensured, and the heat exchange medium is further fully mixed during circulation, making the temperature distribution of the fluid in the multiple circulation channels 23 more uniform.

[0049] It is worth noting that: Figure 3 and Figure 4 As shown, in a specific embodiment of the present invention, a plurality of the three-dimensional ribs 21 are arranged at equal intervals along the central axis of the circulation channel.

[0050] like Figure 3 and Figure 4 As shown, the three-dimensional ribs 21 are cylindrical ribs 211, one axial end of which is fixedly connected to the partition 10. At least a portion of the outer circumference of the cylindrical ribs 211 blocks a portion of the flow channel 23. The central axis of the cylindrical ribs 211 in the multiple fin units 20 within the same three-dimensional fin row is perpendicular to the partition 10. By configuring the three-dimensional ribs 21 as cylindrical ribs 211, processing and molding are facilitated. Furthermore, when the heat exchange medium flows through the cylindrical ribs 211, the fluid generates strong vortices there, resulting in a rapid increase in the local flow velocity in the discontinuity region, thereby further enhancing the degree of mixing of the local fluid within the discontinuity region.

[0051] It should be noted that: in actual use, the installation position of the cylindrical rib 211, the relative position relationship between the cylindrical rib 211 and the three-dimensional fin 22, etc. may not be fixed and can be flexibly set according to actual use requirements in actual applications to improve applicability.

[0052] like Figure 3 and Figure 4 As shown, the central axes of the cylindrical ribs 211 in the multiple fin units 20 in the same three-dimensional fin row are arranged in the same plane and are equidistantly spaced.

[0053] like Figure 5 and Figure 6 As shown, the three-dimensional ribs 21 are diamond-shaped ribs 212, one axial end of which is fixedly connected to the partition 10. At least a portion of the outer circumference of the diamond-shaped ribs 212 blocks a portion of the flow channel 23. The central axes of the diamond-shaped ribs 212 in the multiple fin units 20 within the same three-dimensional fin row are perpendicular to the partition 10. By arranging the central axes of the diamond-shaped ribs 212 in the multiple fin units 20 within the same three-dimensional fin row to be perpendicular to the partition 10, the outer circumference area of ​​the diamond-shaped ribs 212 is maximized, allowing the fluid to accelerate and remove more heat from the diamond-shaped ribs 212 and the three-dimensional fins 22. At the same time, the strong eddy currents generated also impact the boundaries on both sides of the three-dimensional fins 22, increasing the temperature gradient and thus enhancing the overall heat exchange performance between the heat exchange medium and the three-dimensional fins 22.

[0054] like Figure 5 and Figure 6 As shown, the central axes of the diamond-shaped ribs 212 in the multiple fin units 20 in the same three-dimensional fin row are arranged in the same plane and are equidistantly spaced; Figure 6As shown, the diamond rib 212 has a diamond cross section perpendicular to the axial direction (ie Figure 6 (projected shape from a middle top view angle), one diagonal of the diamond-shaped cross section is parallel to or collinear with the central axis of the circulation channel 23. By arranging one diagonal of the diamond-shaped cross section parallel to or collinear with the central axis of the circulation channel 23, the diamond-shaped ribs 212 have a better flow diversion effect on the fluid, generating strong eddies in the fluid, causing the local flow velocity in the discontinuity area to increase rapidly, thereby further enhancing the degree of local fluid mixing in the discontinuity area.

[0055] like Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, multiple fin units 20 within a single three-dimensional fin array are spaced evenly apart. Multiple three-dimensional fin arrays are spaced evenly apart on the partition 10. Multiple three-dimensional fins 22 on the partition 10 are arranged in multiple rows and columns to form a three-dimensional fin matrix. This three-dimensional fin matrix ensures orderly control and regulation of the flow of a heat exchange medium (e.g., air) from a structural perspective.

[0056] The present invention also provides a plate-fin heat exchanger comprising the above-mentioned heat exchange fin structure.

[0057] like Figure 7 and Figure 8 As shown, the plate-fin heat exchanger includes multiple heat exchange fin structures, which are stacked in sequence to form a multi-layer heat exchange structure. The two ends of the three-dimensional rib 21 in one heat exchange fin structure in the multi-layer heat exchange structure are respectively connected to the partition 10 in the same heat exchange fin structure and the partition 10 in another adjacent heat exchange fin structure; and / or the two ends of the three-dimensional fin 22 in one heat exchange fin structure in the multi-layer heat exchange structure are respectively connected to the partition 10 in the same heat exchange fin structure and the partition 10 in another adjacent heat exchange fin structure. By providing the plate-fin heat exchanger with multiple heat exchange fin structures, the heat exchange efficiency of the plate-fin heat exchanger is guaranteed while further ensuring the lightweight and simplified structure of the plate-fin heat exchanger.

[0058] like Figure 7 and Figure 8 As shown, in a multi-layer heat exchange structure, there are two adjacent heat exchange fin structures, wherein the extension direction of the central axis of the flow channel 23 in one heat exchange fin structure is angled with the extension direction of the central axis of the flow channel 23 in the other heat exchange fin structure. By setting the extension direction of the central axis of the flow channel 23 in one heat exchange fin structure at an angle (e.g., a right angle) to the extension direction of the central axis of the flow channel 23 in the other heat exchange fin structure, the flow conditions of the heat exchange medium in the different heat exchange fin structures are different, thereby ensuring sufficient mixing of the heat exchange medium fluid and improving the heat exchange effect.

[0059] like Figure 7 and Figure 8 As shown, the multi-layer heat exchange structure comprises three stacked heat exchange fin structures: a first heat exchange fin structure 30, a second heat exchange fin structure 40, and a third heat exchange fin structure 50. The central axis of the flow channel 23 in the first heat exchange fin structure 30 extends perpendicularly to the central axis of the flow channel 23 in the second heat exchange fin structure 40; and the central axis of the flow channel 23 in the first heat exchange fin structure 30 extends parallel to the central axis of the flow channel 23 in the third heat exchange fin structure 50. This arrangement ensures that the multi-layer heat exchange structure is easy to form and assemble while maintaining its heat exchange efficiency.

[0060] like Figure 7As shown, in the first embodiment of the present invention, the plate-fin heat exchanger includes a plurality of heat exchange fin structures, and the plurality of heat exchange fin structures are stacked in sequence to form a multi-layer heat exchange structure; the two ends of the three-dimensional rib 21 in one heat exchange fin structure in the multi-layer heat exchange structure are respectively connected to the partition 10 in the same heat exchange fin structure and the partition 10 of another adjacent heat exchange fin structure; the two ends of the three-dimensional fin 22 in one heat exchange fin structure in the multi-layer heat exchange structure are respectively connected to the partition 10 in the same heat exchange fin structure and the partition 10 of another adjacent heat exchange fin structure; there are three heat exchange fin structures stacked in sequence in the multi-layer heat exchange structure, namely the first heat exchange fin structure 30, the second heat exchange fin structure 40 and a third heat exchange fin structure 50, wherein the extension direction of the central axis of the circulation channel 23 in the first heat exchange fin structure 30 is perpendicular to the extension direction of the central axis of the circulation channel 23 in the second heat exchange fin structure 40; the extension direction of the central axis of the circulation channel 23 in the first heat exchange fin structure 30 is parallel to the extension direction of the central axis of the circulation channel 23 in the third heat exchange fin structure 50; the heat exchange fin structure includes a partition 10 and a plurality of fin units 20 spaced apart on the partition 10, the fin unit 20 includes a three-dimensional rib column 21 and a three-dimensional fin 22, the interior of the three-dimensional fin 22 has a circulation channel 23 for circulating a heat exchange medium, the three-dimensional fin 22 is spaced apart from the three-dimensional rib column 21, and at least one of the three-dimensional rib column 21 is spaced apart. A portion of the flow channel 23 is blocked to disturb the circulating heat exchange medium; wherein, the central axes of the flow channels 23 of at least a portion of the multiple fin units 20 coincide to form a three-dimensional fin column, and the heat exchange medium can pass through the multiple fin units 20 in the three-dimensional fin column in sequence to exchange heat; the three-dimensional fin 22 includes a first fin plate 221, a second fin plate 222 and a third fin plate 223, one end of the first fin plate 221 and the second fin plate 222 are respectively fixedly connected to the partition 10, and the other ends of the first fin plate 221 and the second fin plate 222 are respectively connected to the two ends of the third fin plate 223; the third fin plate 223 is arranged in parallel with the partition 10; the first fin plate 221 and the second fin plate 222 are spaced apart, and the first fin plate 221 and the second fin plate 222 are spaced apart. A circulation channel 23 is formed between the plate 221, the second fin plate 222 and the third fin plate 223; the three-dimensional rib column 21 is a cylindrical rib column 211, one axial end of the cylindrical rib column 211 is fixedly connected to the partition plate 10, and at least a part of the outer peripheral surface of the cylindrical rib column 211 blocks a part of the circulation channel 23; wherein, the central axis of the cylindrical rib column 211 in the multiple fin units 20 in the same three-dimensional fin column is perpendicular to the partition plate 10; a fin unit 20 includes two cylindrical rib columns 211; the working effect of the discontinuous area between the three-dimensional fin 22 and the two cylindrical rib columns 211 is ensured, and the heat exchange medium is further fully mixed when the fluid circulates, so that the temperature distribution of the fluid in the multiple circulation channels 23 is more uniform.

[0061] It is worth noting that in the first embodiment of the present invention, two cylindrical ribs 211 are provided in each discontinuous area, and the shape, quantity, size and arrangement of the cylindrical ribs 211 can be changed as required to improve applicability.

[0062] like Figure 8As shown, in the second embodiment of the present invention, the plate-fin heat exchanger includes a plurality of heat exchange fin structures, and the plurality of heat exchange fin structures are stacked in sequence to form a multi-layer heat exchange structure; the two ends of the three-dimensional rib 21 in one heat exchange fin structure in the multi-layer heat exchange structure are respectively connected to the partition 10 in the same heat exchange fin structure and the partition 10 of another adjacent heat exchange fin structure; the two ends of the three-dimensional fin 22 in one heat exchange fin structure in the multi-layer heat exchange structure are respectively connected to the partition 10 in the same heat exchange fin structure and the partition 10 of another adjacent heat exchange fin structure; there are three heat exchange fin structures stacked in sequence in the multi-layer heat exchange structure. The heat exchange fin structure comprises a first heat exchange fin structure 30, a second heat exchange fin structure 40 and a third heat exchange fin structure 50, wherein the extension direction of the central axis of the flow channel 23 in the first heat exchange fin structure 30 is perpendicular to the extension direction of the central axis of the flow channel 23 in the second heat exchange fin structure 40; the extension direction of the central axis of the flow channel 23 in the first heat exchange fin structure 30 is parallel to the extension direction of the central axis of the flow channel 23 in the third heat exchange fin structure 50; the heat exchange fin structure comprises a partition 10 and a plurality of fin units 20 spaced apart on the partition 10, the fin unit 20 comprises a three-dimensional rib column 21 and a three-dimensional fin 22, the inner The three-dimensional fin 22 is provided with a circulation channel 23 for circulating a heat exchange medium. The three-dimensional fin 22 is spaced apart from the three-dimensional rib column 21, and at least a portion of the three-dimensional rib column 21 blocks a portion of the circulation channel 23 to disturb the circulating heat exchange medium. The central axes of the circulation channels 23 of at least a portion of the plurality of fin units 20 coincide to form a three-dimensional fin column. The heat exchange medium can sequentially pass through the plurality of fin units 20 in the three-dimensional fin column to perform heat exchange. The three-dimensional fin 22 includes a first fin plate 221, a second fin plate 222 and a third fin plate 223. One end of the first fin plate 221 and the second fin plate 222 are respectively fixedly connected to the partition 10. The first fin plate 221 is fixedly connected to the partition 10. 221 and the other end of the second fin 222 are respectively connected to the two ends of the third fin 223; the third fin 223 is arranged parallel to the partition 10; the first fin 221 and the second fin 222 are spaced apart, and a circulation channel 23 is formed between the first fin 221, the second fin 222 and the third fin 223; the three-dimensional rib column 21 is a diamond rib column 212, and one axial end of the diamond rib column 212 is fixedly connected to the partition 10, and at least a part of the outer peripheral surface of the diamond rib column 212 blocks a part of the circulation channel 23; wherein, the central axis of the diamond rib column 212 in multiple fin units 20 in the same three-dimensional fin column is perpendicular to the partition 10. By setting the central axis of the diamond ribs 212 in multiple fin units 20 within the same three-dimensional fin row to be perpendicular to the partition 10, the peripheral area of ​​the diamond ribs 212 is maximized, so that the fluid is accelerated to take away more heat from the diamond ribs 212 and the three-dimensional fins 22. At the same time, the strong eddy currents generated also impact the boundaries on both sides of the three-dimensional fins 22, increasing the temperature gradient, thereby enhancing the comprehensive heat exchange performance between the heat exchange medium and the three-dimensional fins 22.

[0063] The plate-fin heat exchangers in the above-mentioned embodiments 1 and 2 both have a multi-layer fin flow channel structure. Strong vortices are continuously formed in each layer of the flow channel of the plate-fin heat exchanger, which is also conducive to the heat exchange of the fluid between the two connected layers of the flow channel through the partition 10. At the same time, the overall weight of the plate-fin heat exchanger using the multi-layer fin unit 20 will be greatly reduced compared to the existing multi-layer serrated fin structure, which can save more costs.

[0064] In addition, in the present invention, three-dimensional ribs 21 of the same shape, quantity and size are generally arranged in the discontinuous area of ​​the single-layer flow channel (i.e., a single-layer heat exchange fin structure). In addition, three-dimensional ribs 21 of different shapes, quantities and sizes can also be mixed and used in the single-layer flow channel; the present invention replaces the straight fins with gradually expanding fins (i.e., three-dimensional fins 22 with gradually expanding channels), and opens discontinuous areas and arranges three-dimensional ribs 21. In addition, other types of existing fins can also be used as the basis to replace the functions of the three-dimensional fins 22.

[0065] It should be noted that: in actual applications, while ensuring that the overall dimensions of the gradually expanding channel and the discontinuous area remain unchanged, the flow pattern, vortex intensity, contact area between the fluid and the three-dimensional ribs 21, and the weight of the three-dimensional ribs 21 of the heat exchange medium fluid can be changed by arranging three-dimensional ribs 21 of different shapes, quantities, and sizes in the discontinuous area. Finally, suitable parameters are selected to optimize the flow and heat transfer characteristics, thereby enabling the plate-fin heat exchanger to obtain the best comprehensive heat transfer performance, and at the same time, the overall weight can be further reduced.

[0066] In summary, the present invention provides a heat exchange fin structure and a plate-fin heat exchanger. The present invention provides a heat exchange fin structure and a plate-fin heat exchanger. The present invention arranges the three-dimensional fins 22 and the three-dimensional ribs 21 at intervals. Compared with the zigzag fin structure arranged continuously in the prior art, the heat exchange fin structure in the present invention is lighter than the existing zigzag fin structure, and the discontinuous area between the three-dimensional fins 22 and the three-dimensional ribs 21 will promote the full mixing of the fluid when the heat exchange medium flows, so that the temperature distribution of the fluid in the multiple flow channels 23 is more uniform; when the heat exchange medium flows through the three-dimensional ribs 21 as a fluid, the fluid will generate a strong vortex here, resulting in a relatively high local flow rate in the discontinuous area. The temperature of the three-dimensional fins 22 increases rapidly, thereby further enhancing the degree of mixing of the local fluid in the discontinuous area, and accelerating the fluid to take away more heat from the three-dimensional ribs 21 and the three-dimensional fins 22. At the same time, the strong eddy currents generated also impact the boundaries on both sides of the three-dimensional fins 22, increasing the temperature gradient, thereby enhancing the comprehensive heat exchange performance between the heat exchange medium and the three-dimensional fins 22. The present invention designs an intermittent fin structure with three-dimensional ribs 21, which can be used in plate-fin heat exchangers. Compared with the existing continuous zigzag fins, the plate-fin heat exchanger using the heat exchange fin structure proposed by the present invention has a smaller overall weight and better comprehensive heat exchange performance, and is suitable for large-scale promotion and use.

[0067] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0068] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0069] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0070] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0071] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0072] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A heat exchange fin structure, characterized in that: The invention comprises a partition (10) and a plurality of fin units (20) arranged at intervals on the partition (10), wherein the fin units (20) comprise three-dimensional ribs (21) and three-dimensional fins (22), wherein the interior of the three-dimensional fins (22) has a circulation channel (23) for circulating a heat exchange medium, and the three-dimensional fins (22) are arranged at intervals from the three-dimensional ribs (21), and at least a portion of the three-dimensional ribs (21) blocks a portion of the circulation channel (23) to disturb the circulating heat exchange medium; wherein the central axes of the circulation channels (23) of at least a portion of the plurality of fin units (20) coincide with each other to form a three-dimensional fin column, and the heat exchange medium can sequentially pass through the plurality of fin units (20) in the three-dimensional fin column to perform heat exchange; The circulation channel (23) is a variable-size channel so as to change at least one of the flow rate, flow direction and pressure of the circulating heat exchange medium; The inlet size of the circulation channel (23) is smaller than the outlet size of the circulation channel (23) to form a gradually expanding channel.

2. The heat exchange fin structure according to claim 1, characterized in that: The three-dimensional fin (22) includes a first fin plate (221), a second fin plate (222) and a third fin plate (223), one end of the first fin plate (221) and the second fin plate (222) are respectively fixedly connected to the partition plate (10), and the other ends of the first fin plate (221) and the second fin plate (222) are respectively connected to the two ends of the third fin plate (223); the third fin plate (223) is arranged parallel to the partition plate (10); the first fin plate (221) and the second fin plate (222) are arranged at intervals, and the first fin plate (221), the second fin plate (222) and the third fin plate (223) jointly form the circulation channel (23).

3. The heat exchange fin structure according to claim 2, characterized in that: The plurality of three-dimensional fins (22) in the same row of three-dimensional fins are arranged at equal intervals; the third fin plates (223) of the plurality of three-dimensional fins (22) in the same row of three-dimensional fins are arranged in the same plane, the first fin plates (221) of the plurality of three-dimensional fins (22) in the same row of three-dimensional fins are arranged in parallel, and the second fin plates (222) of the plurality of three-dimensional fins (22) in the same row of three-dimensional fins are arranged in parallel.

4. The heat exchange fin structure according to claim 1, characterized in that: There are a plurality of three-dimensional rib columns (21), and the plurality of three-dimensional rib columns (21) are arranged at intervals.

5. The heat exchange fin structure according to claim 1, characterized in that: The three-dimensional rib column (21) is a cylindrical rib column (211), one axial end of the cylindrical rib column (211) is fixedly connected to the partition (10), and at least a portion of the outer peripheral surface of the cylindrical rib column (211) blocks a portion of the flow channel (23); wherein, the central axis of the cylindrical rib column (211) in the multiple fin units (20) in the same three-dimensional fin row is perpendicular to the partition (10).

6. The heat exchange fin structure according to claim 5, characterized in that: The central axes of the cylindrical ribs (211) in the plurality of fin units (20) in the same three-dimensional fin row are arranged in the same plane and are spaced equidistantly.

7. The heat exchange fin structure according to claim 1, characterized in that: The three-dimensional rib column (21) is a diamond-shaped rib column (212), one axial end of the diamond-shaped rib column (212) is fixedly connected to the partition (10), and at least a portion of the outer peripheral surface of the diamond-shaped rib column (212) blocks a portion of the flow channel (23); wherein, the central axis of the diamond-shaped rib column (212) in the multiple fin units (20) in the same three-dimensional fin column is perpendicular to the partition (10).

8. The heat exchange fin structure according to claim 7, characterized in that: The central axes of the diamond ribs (212) in the plurality of fin units (20) in the same three-dimensional fin row are coplanar and equidistantly spaced; the diamond ribs (212) have a diamond cross-section perpendicular to the axial direction, and a diagonal of the diamond cross-section is parallel to or colinear with the central axis of the circulation channel (23).

9. The heat exchange fin structure according to claim 1, characterized in that: The plurality of fin units (20) in the same three-dimensional fin column are arranged at equal intervals; there are a plurality of three-dimensional fin columns, and the plurality of three-dimensional fin columns are arranged at equal intervals on the partition (10); the plurality of three-dimensional fins (22) on the partition (10) are arranged in multiple rows and columns to form a three-dimensional fin matrix.

10. A plate-fin heat exchanger, characterized in that: The heat exchange fin structure comprises the heat exchange fin structure according to any one of claims 1 to 9.

11. The plate-fin heat exchanger according to claim 10, characterized in that: The plate-fin heat exchanger comprises a plurality of heat exchange fin structures, which are stacked in sequence to form a multi-layer heat exchange structure; the two ends of a three-dimensional rib column (21) in one of the heat exchange fin structures in the multi-layer heat exchange structure are respectively connected to a partition (10) in the same heat exchange fin structure and a partition (10) in another adjacent heat exchange fin structure; and / or the two ends of a three-dimensional fin (22) in one of the heat exchange fin structures in the multi-layer heat exchange structure are respectively connected to a partition (10) in the same heat exchange fin structure and a partition (10) in another adjacent heat exchange fin structure.

12. The plate-fin heat exchanger according to claim 11, characterized in that There are two adjacent heat exchange fin structures in the multi-layer heat exchange structure, wherein the extension direction of the central axis of the circulation channel (23) in one of the heat exchange fin structures and the extension direction of the central axis of the circulation channel (23) in the other heat exchange fin structure have an included angle.

13. The plate-fin heat exchanger according to claim 12, characterized in that: In the multi-layer heat exchange structure, there are three heat exchange fin structures stacked in sequence, namely a first heat exchange fin structure (30), a second heat exchange fin structure (40) and a third heat exchange fin structure (50), wherein the extension direction of the central axis of the circulation channel (23) in the first heat exchange fin structure (30) is perpendicular to the extension direction of the central axis of the circulation channel (23) in the second heat exchange fin structure (40); and the extension direction of the central axis of the circulation channel (23) in the first heat exchange fin structure (30) is parallel to the extension direction of the central axis of the circulation channel (23) in the third heat exchange fin structure (50).

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