Plate heat exchanger plate with oval and circular-truncated-cone-shaped concave-convex structures

Abstract

The plate heat exchanger plate sheet comprises fluid inlet and outlet areas, a flow guide area and a core heat exchange area, the fluid inlet and outlet areas are located at the two ends of the plate sheet, and annular concave structures and annular convex structures are arranged in the fluid inlet and outlet areas side by side; the flow guide area is located on the inner side of the fluid inlet and outlet area, the flow guide area is provided with an oval concave-convex structure and a circular-truncated-cone-shaped concave-convex structure, the oval concave-convex structure comprises oval pits and oval protrusions which are distributed at a certain angle, and the circular-truncated-cone-shaped concave-convex structure comprises circular-truncated-cone-shaped pits and circular-truncated-cone-shaped protrusions; the core heat exchange area is located in the middle of the plate sheet and comprises a plurality of rows of oval concave-convex structures, a row of circular-truncated-cone-shaped concave-convex structures are arranged between every two adjacent rows of oval concave-convex structures, and each row of oval concave-convex structures comprises oval pits and oval protrusions which are arranged according to a certain rule. And each row of circular-truncated-cone-shaped concave-convex structures comprises circular-truncated-cone-shaped recesses and circular-truncated-cone-shaped bulges which are arranged according to a certain rule.

Description

Technical Field

[0001] The invention belongs to the technical field of brazed plate heat exchangers, and in particular relates to a plate heat exchanger plate with an elliptical and truncated cone-shaped concave-convex structure. Background Art

[0002] With the rapid development of energy storage and battery technology, the demand for thermal management systems is becoming increasingly urgent. Especially in the pursuit of miniaturization and high efficiency of equipment, brazed plate heat exchangers have gradually become core components in the field of thermal management due to their compact structure and efficient heat exchange performance.

[0003] In the current market, the mainstream plate heat exchanger plate waveforms are mainly divided into two categories: herringbone waveform and point waveform. Among them, the herringbone waveform plate heat exchanger has won wide favor in the market with its relatively low manufacturing cost and simple production process. However, under the same specifications and dimensions, its heat exchange efficiency is often difficult to fully meet the high-efficiency heat exchange requirements in high-end application scenarios, especially in energy storage or battery systems with high requirements for temperature control accuracy. Although the point waveform plate heat exchanger can provide more efficient heat exchange performance, its complex manufacturing process and high manufacturing cost have become the key factors restricting its market promotion, and many customers are discouraged.

[0004] In view of the above-mentioned market pain points, after in-depth research and technological innovation, the applicant successfully designed and invented a high-efficiency plate heat exchanger plate with an elliptical and truncated cone-shaped concave-convex structure to solve the above-mentioned technical problems. Summary of the invention

[0005] The present invention provides a plate heat exchanger plate with elliptical and truncated cone-shaped concave-convex structures. Through a unique design of positive and negative alternating elliptical and truncated cone-shaped concave-convex structures, the heat exchange fluid is guided to form eddies and turbulence, thereby significantly improving the heat exchange efficiency and reducing the flow resistance while maintaining a low manufacturing cost.

[0006] The present invention provides a plate heat exchanger plate with an elliptical and truncated cone shaped concave-convex structure, which adopts the following technical scheme: comprising: A fluid inlet and outlet area, the fluid inlet and outlet area is located at two ends of the plate, and the fluid inlet and outlet area is arranged side by side with an annular concave structure and an annular convex structure to control the fluid flow area; A flow guiding area, the flow guiding area is located inside the fluid inlet and outlet area, the flow guiding area is arranged with an elliptical concave-convex structure and a truncated cone-shaped concave-convex structure, the elliptical concave-convex structure includes an elliptical depression and an elliptical protrusion distributed at a certain angle, and the truncated cone-shaped concave-convex structure includes a truncated cone-shaped depression and a truncated cone-shaped protrusion, so as to control the flow direction of the fluid; The core heat exchange area is located in the middle of the plate, and the core heat exchange area includes several rows of elliptical concave-convex structures. A row of truncated cone-shaped concave-convex structures is arranged between adjacent rows of elliptical concave-convex structures. Each row of the elliptical concave-convex structures includes elliptical depressions and elliptical protrusions arranged according to a certain pattern, and each row of the truncated cone-shaped concave-convex structures includes truncated cone-shaped depressions and truncated cone-shaped protrusions arranged according to a certain pattern, so as to enhance flow mixing.

[0007] Preferably, the central angles of the annular concave structure and the annular convex structure are both 30°-360°, and the openings of the annular concave structure and the annular convex structure face the guide area.

[0008] Preferably, the flow direction of the fluid can flow into the fluid inlet and outlet areas on the same side or the opposite side.

[0009] Preferably, the angle of the elliptical concave-convex structure of the guide area relative to the fluid flow direction is 5°-90°.

[0010] Preferably, each row of elliptical concave-convex structures in the core heat exchange zone is arranged in a cycle according to elliptical depressions and elliptical protrusions, and adjacent rows of elliptical depressions and adjacent rows of elliptical protrusions form a V-shaped layout; each row of the truncated cone shaped concave-convex structures is arranged at intervals by truncated cone shaped depressions and truncated cone shaped protrusions, and the cross-sectional shapes of the truncated cone shaped depressions and truncated cone shaped protrusions are circular, oblong or elliptical.

[0011] Preferably, adjacent rows of elliptical concave-convex structures in the core heat exchange zone may form a “<” group and a “>” group; for the “<” group, one or more of the truncated cone-shaped protrusions are located upstream of the elliptical protrusions in the “<” group and downstream of the elliptical depressions in the “<” group, that is, the truncated cone-shaped protrusions are located on the wall between the elliptical protrusions in the “<” group and the elliptical depressions in the “<” group; one or more of the truncated cone-shaped depressions are located downstream of the elliptical protrusions in the “<” group and upstream of the elliptical depressions in the “<” group, that is, the truncated cone-shaped depressions are located on the wall between the elliptical protrusions in the “<” group and the elliptical depressions in the “<” group.

[0012] Preferably, for the “>” group, one or more of the truncated cone shaped protrusion structures are located downstream of the elliptical protrusion structures in the “>” group and upstream of the elliptical depressions in the “>” group, that is, the truncated cone shaped protrusions are located on the wall between the elliptical protrusions in the “>” group and the elliptical depressions in the “>” group; one or more of the truncated cone shaped depressions are located upstream of the elliptical protrusions in the “>” group and downstream of the elliptical depressions in the “>” group, that is, the truncated cone shaped depressions are located on the wall between the elliptical protrusions in the “>” group and the elliptical depressions in the “>” group.

[0013] Preferably, the ratio of the length to the diameter of the elliptical concave-convex structure is 1-10; the ratio of the depth to the diameter of the elliptical depression is 0.1-1; and the ratio of the upper base area to the lower base area of ​​the truncated cone protrusion is 1-5.

[0014] Preferably, the ratio of the row spacing or column spacing of the elliptical concave-convex structure of the core heat exchange zone to the length of the elliptical concave-convex structure is 0.5-5.

[0015] Preferably, the plate and the plate rotated 180° are stacked to form a heat exchanger core.

[0016] Beneficial effects of the present invention: (1) The plate structure of the plate heat exchanger of the present invention is processed by stamping technology. Based on the design of axisymmetry and center symmetry, the entire heat exchanger core only needs one type of plate to be stacked, which effectively saves the cost of plate mold opening, shortens the R&D and processing cycle, and helps to reduce costs and increase efficiency.

[0017] (2) The present invention innovatively uses the elliptical concave-convex structure for sealing, guiding and heat exchange of the entire plate; when the fluid flows through the elliptical protrusions, it forms an impact on the windward side, which greatly improves the heat exchange efficiency, and then flows along the depression caused by the elliptical protrusions of the upper plate, which effectively reduces the flow resistance compared to direct impact; in the elliptical depression, the fluid forms a spiral vortex structure and gradually expands along the flow direction, with intense mixing, which significantly improves the mixing degree of fluid and fluid and the contact frequency of fluid and metal plate.

[0018] (3) The truncated cone-shaped concave-convex structure provided in the core heat exchange area of ​​the present invention has multiple functions. On the one hand, the truncated cone-shaped protrusion of the lower plate and the truncated cone-shaped depression of the upper plate are in contact with each other, so that the welding area of ​​the plate is increased, thereby improving the overall structural strength of the heat exchanger; on the other hand, when the fluid flows through the truncated cone-shaped protrusion, it is diverted to both sides, which can effectively prevent the fluid from accumulating and scaling between rows and increase the contact area between the fluid and the plate; The truncated cone-shaped concave-convex structures of the “<” group and the “>” group are in relatively different positions. For the “<” group, the truncated cone-shaped protrusions are in contact with the truncated cone-shaped depressions of the upper plate, blocking the fluid passage and causing it to cross the elliptical protrusions on both sides to enhance flow mixing. Subsequently, the fluid flows through the truncated cone-shaped depressions, thereby enhancing the originally low heat exchange area. For the “>” group, the truncated cone-shaped concave-convex structure is located at the center of the “>” group. The elliptical concave-convex structure of the “>” group forms a contraction-type flow passage, which converges low-speed vortices, and the truncated cone-shaped concave-convex structure located in the center decelerates or diverts the fluid in a timely manner. Taking the truncated cone-shaped protrusion as an example, it contacts the truncated cone-shaped depression of the upper plate, blocks the central passage, and drives the fluid to flow toward the depression formed by the elliptical depression of the plate or the elliptical protrusion of the upper plate. Finally, when the fluid flows through the truncated cone-shaped concave-convex structure, it also forms an impact on the windward side, thereby improving the local heat exchange efficiency. However, due to the small proportion of the truncated cone-shaped concave-convex structure, the increase in flow loss has little effect.

[0019] In summary, the plate heat exchanger plates with elliptical and truncated cone-shaped concave-convex structures of the present invention have higher heat exchange efficiency and lower flow resistance, effectively reducing pumping energy consumption and operating costs; the stamping processing method has significant cost advantages compared to the complex and expensive point-corrugated plates; and the concave-convex structure parameters on the plates can be flexibly adjusted according to actual application requirements to adapt to different working conditions, and have extremely strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] For ease of explanation, the present invention is described in detail with reference to the following specific implementations and the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of a specific area range of the plate in Example 1 when viewed from above; Figure 2 It is a schematic diagram of the structure of each area of ​​the plate in the first embodiment from a top view; Figure 3 A schematic diagram of the steps of stacking the plates of Example 1; Figure 4 This is a schematic diagram of two plates stacked in Example 1; Figure 5 This is a schematic diagram of the state of the plate in the heat exchange process of Example 1; Figure 6 It is a schematic diagram of the flow rate change of the plate in the heat exchange process of Example 1; Figure 7 It is a schematic diagram of the structure of each area of ​​the plate in Example 2 from a top view.

[0022] In the figure: A-fluid inlet and outlet area; B-flow guide area; C-core heat exchange area; 1- annular concave structure; 2- annular convex structure; 3- elliptical concave; 4- elliptical convex; 5- truncated cone-shaped concave; 6- truncated cone-shaped convex. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments; in the following description, specific details such as specific configurations and components are provided only to help fully understand the embodiments of the present invention. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. In addition, for the sake of clarity and brevity, the description of known functions and structures is omitted.

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0025] Embodiment 1: like Figure 1-Figure 6 As shown, a plate heat exchanger plate with an elliptical and truncated cone-shaped concave-convex structure provided in this embodiment includes a fluid inlet and outlet area A, a guide area B, and a core heat exchange area C; wherein the fluid inlet and outlet area A is located at both ends of the plate, and the fluid inlet and outlet area A is arranged with an annular concave structure 1 and an annular convex structure 2 side by side to control the fluid flow area; the guide area B is located on the inner side of the fluid inlet and outlet area A, and the guide area B is arranged with an elliptical concave-convex structure and a truncated cone-shaped concave-convex structure, the elliptical concave-convex structure includes an elliptical concave 3 and an elliptical convex 4 distributed at a certain angle, and the truncated cone-shaped concave-convex structure includes The truncated cone-shaped depressions 5 and truncated cone-shaped protrusions 6 are used to control the flow direction of the fluid; the core heat exchange area C is located in the middle of the plate, and the core heat exchange area C includes several rows of elliptical concave-convex structures, and a row of truncated cone-shaped concave-convex structures is arranged between adjacent rows of elliptical concave-convex structures, and each row of elliptical concave-convex structures includes elliptical depressions 3 and elliptical protrusions 4 arranged according to a certain pattern, and each row of truncated cone-shaped concave-convex structures includes truncated cone-shaped depressions 5 and truncated cone-shaped protrusions 6 arranged according to a certain pattern to enhance flow mixing; when in use, a plate is stacked with another plate rotated 180° to form a heat exchanger core.

[0026] The plate structure of the plate heat exchanger of this embodiment is processed by stamping technology. The fluid inlet and outlet areas A, the guide area B, and the core heat exchange area C arranged on the plates are designed based on axisymmetry and central symmetry, so that the entire heat exchanger core only needs one type of plate to be stacked, which effectively saves the cost of plate mold opening, shortens the R&D and processing cycle, and helps to reduce costs and increase efficiency.

[0027] Furthermore, the central angles of the annular recessed structure 1 and the annular raised structure 2 are selected and set within the range of 30°-360°, and the openings of the annular recessed structure 1 and the annular raised structure 2 face the guide area B, so as to facilitate the control of the fluid flow into the guide area B; the flow direction of the fluid can flow in from the fluid inlet and outlet area A on the same side or the opposite side, that is, the fluid can enter from the annular recessed structure 1 and the annular raised structure 2 at one end of the plate at the same time, or from the annular recessed structure 1 or the annular raised structure 2 at both ends of the plate respectively.

[0028] Furthermore, the angles of the elliptical depression 3 and the elliptical protrusion 4 of the guide area B relative to the fluid flow direction are selected and set within the range of 5°-90°, so as to facilitate the control of the fluid flow direction.

[0029] Further, each row of elliptical concave-convex structures in the core heat exchange zone C is arranged in a cycle according to the elliptical depressions 3 and the elliptical protrusions 7, and the adjacent rows of elliptical depressions 3 and adjacent rows of elliptical protrusions 4 form a V-shaped layout; each row of truncated cone shaped concave-convex structures is arranged alternately by truncated cone shaped depressions 5 and truncated cone shaped protrusions 6. Specifically, the first row of truncated cone shaped concave-convex structures starts with truncated cone shaped protrusions 6, and the second row of truncated cone shaped concave-convex structures starts with truncated cone shaped depressions 5. For details, please refer to Figure 1-2 The plate structure shown.

[0030] When using this embodiment, please refer to Figure 3 The plates of the lower layer are obtained by flipping the plates of the upper layer 180°, and then the plates of the upper layer are stacked with the plates of the lower layer; the fluid enters from the fluid inlet and outlet area A, and forms an impact on the windward side when flowing through the elliptical protrusion 4, which greatly improves the heat exchange efficiency, and then flows along the depression caused by the elliptical protrusion 4 of the upper plate, which effectively reduces the flow resistance compared with direct impact. In the elliptical depression 3, the fluid forms a spiral vortex structure and gradually expands along the flow direction, with intense mixing, which significantly improves the mixing degree of the fluid and the contact frequency of the fluid and the metal plate.

[0031] Furthermore, adjacent rows of elliptical concave-convex structures in the core heat exchange area can form a "<" group and a ">" group, such as Figure 1-2As shown. For the "<" group, the truncated cone shaped protrusion 6 is located upstream of the "<" group elliptical protrusion 4 and downstream of the "<" group elliptical depression 3, that is, the truncated cone shaped protrusion 6 is located on the wall surface between the "<" group elliptical protrusion 4 and the "<" group elliptical depression 3; the truncated cone shaped depression 5 is located downstream of the "<" group elliptical protrusion 4 and upstream of the "<" group elliptical depression 3, that is, the truncated cone shaped depression 5 is located on the wall surface between the "<" group elliptical protrusion 4 and the "<" group elliptical depression 3. For the “>” group, the truncated cone shaped protrusion 6 is located downstream of the elliptical protrusion 4 in the “>” group and upstream of the elliptical depression 3 in the “>” group, that is, the truncated cone shaped protrusion 6 is located on the wall surface between the elliptical protrusion 4 in the “>” group and the elliptical depression 3 in the “>” group; the truncated cone shaped depression 5 is located upstream of the elliptical protrusion 4 in the “>” group and downstream of the elliptical depression 3 in the “>” group, that is, the truncated cone shaped depression 5 is located on the wall surface between the elliptical protrusion 4 in the “>” group and the elliptical depression 3 in the “>” group.

[0032] When in use, the plate composition is as follows Figure 3-4 In the heat exchange core shown in the figure, the truncated cone-shaped protrusions 6 of the lower plate are in contact with the truncated cone-shaped depressions 5 of the upper plate, so that the welding area of ​​the plate is increased, thereby improving the overall structural strength of the heat exchanger; on the other hand, when the fluid flows through the truncated cone-shaped protrusions 6, it is diverted to both sides, which can effectively prevent the fluid from accumulating between rows and increase the contact area between the fluid and the plate.

[0033] For the “<” group, after the upstream fluid impacts the head of the elliptical protrusion 4, it can flow into the elliptical depression 3 from the side and obtain heat transfer enhancement, and force more fluid to flow through the elliptical protrusion 4, resulting in stronger heat transfer. This setting reduces the flow in the gap between the “<” group of elliptical protrusions 4, so that most of the fluid flows through the “<” group of elliptical protrusions 4 and the elliptical depression 3, generating vortex enhanced heat transfer; after the fluid flows through the head of the elliptical protrusion 4, due to the obstruction of the “>” group of protrusions on the upper side wall of the downstream and the obstruction of the downstream truncated cone protrusion, the fluid produces a lateral flow deflected to the lower side wall and toward the downstream elliptical depression 3, and impacts the tail of the downstream elliptical protrusion 4, then turns to flow upward, and under the influence of the downstream adjacent “>” group of elliptical protrusions 4 and the downstream truncated cone protrusion 6, impacts the head of the downstream elliptical protrusion 4, thus generating periodic lateral oscillations and up and down oscillations eddy flow, further enhancing heat transfer.

[0034] For the “>” group, due to the action of the truncated cone-shaped protrusion 6, the fluid flow is improved, and the accumulation of low-speed eddies between the elliptical protrusions 4 in the “>” group to produce large-area low heat transfer is avoided, the interaction between the fluid and the elliptical protrusions 4 and the truncated cone-shaped protrusions 6 is enhanced, and the oscillating flow of the fluid between the upper and lower walls and laterally between the elliptical protrusions 4 is enhanced, thereby increasing the heat transfer area and enhancing the eddy-shaped heat transfer effect; at the same time, the supporting strength between the upper and lower walls between the elliptical protrusions and the depressions is also enhanced.

[0035] For the “>” group, the truncated cone-shaped protrusion 6 can also be an oblong protrusion shape along the flow direction, which is more conducive to increasing the heat exchange area, improving the flow, and more significantly enhancing the heat transfer.

[0036] The size of the truncated cone shaped protrusion 6 in the “<” group is larger than the lateral size of the truncated cone shaped protrusion 6 in the ">” group, so that the flow resistance can be adjusted, so that the flow velocity distribution in the “<” group and the ">” group area is more uniform, and the wall heat transfer is more uniform.

[0037] Furthermore, the length of the elliptical concave-convex structure is 1.0mm-20mm, and the ratio of the length to the diameter of the elliptical concave-convex structure is 1-10; the ratio of the depth to the diameter of the elliptical depression 3 is 0.1-1; the ratio of the upper base area to the lower base area of ​​the truncated cone shaped protrusion 6 is 1-5; the ratio of the row spacing or column spacing of the elliptical concave-convex structure in the core heat exchange area to the length of the elliptical concave-convex structure is 0.5-5. The diameter of the truncated cone shaped convex-concave structure is 0.5mm-10mm. The proportion parameters of the elliptical concave-convex structure and the truncated cone shaped protrusion are optimized and designed, so that the elliptical concave-convex structure and the truncated cone shaped concave-convex structure can better play their role in improving heat exchange efficiency and reducing flow resistance. The parameters can be flexibly adjusted according to actual application requirements to adapt to different working conditions, and have strong applicability.

[0038] Embodiment 2: like Figure 7 As shown, a plate heat exchanger plate with an elliptical and truncated cone shaped concave-convex structure is provided in this embodiment. The difference between this embodiment and the first embodiment is that, for the “>” group and the “<” group, the cross-sectional shape of the truncated cone shaped depression 5 and the truncated cone shaped protrusion 6 can also be an oblong or elliptical shape along the flow direction, and the diameter of the truncated cone shaped depression 5 and the truncated cone shaped protrusion 6 is 0.5mm-10mm, and the length is 1-5 times of the diameter, which is more conducive to increasing the heat exchange area, improving the flow, and more significantly enhancing the heat transfer.

[0039] 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0040] In the description of the present application, it should be understood that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 should not be understood as a limitation on the present application.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

Claims

1. A plate heat exchanger plate with an elliptical and truncated cone shaped concave and convex structure, characterized in that: include: A fluid inlet and outlet area, the fluid inlet and outlet area being located at two ends of the plate, the fluid inlet and outlet area being provided with an annular recessed structure (1) and an annular raised structure (2) arranged side by side to control the fluid flow area; A flow guiding area, the flow guiding area is located inside the fluid inlet and outlet area, the flow guiding area is arranged with an elliptical concave-convex structure and a truncated cone-shaped concave-convex structure, the elliptical concave-convex structure comprises an elliptical depression (3) and an elliptical protrusion (4) distributed at a certain angle, and the truncated cone-shaped concave-convex structure comprises a truncated cone-shaped depression (5) and a truncated cone-shaped protrusion (6), for controlling the flow direction of the fluid; A core heat exchange area, the core heat exchange area is located in the middle of the plate, the core heat exchange area includes a plurality of rows of elliptical concave-convex structures, a row of truncated cone-shaped concave-convex structures is arranged between adjacent rows of elliptical concave-convex structures, each row of the elliptical concave-convex structures includes elliptical depressions (3) and elliptical protrusions (4) arranged according to a certain pattern, and each row of the truncated cone-shaped concave-convex structures includes truncated cone-shaped depressions (5) and truncated cone-shaped protrusions (6) arranged according to a certain pattern, so as to enhance flow mixing.

2. The plate heat exchanger plate with elliptical and truncated cone shaped concave-convex structures according to claim 1, characterized in that: The central angles of the annular recessed structure (1) and the annular raised structure (2) are both 30°-360°, and the openings of the annular recessed structure (1) and the annular raised structure (2) face the flow guide area.

3. The plate heat exchanger plate with elliptical and truncated cone shaped concave-convex structures according to claim 1, characterized in that: The flow direction of the fluid can be from the fluid inlet and outlet areas on the same side or the opposite side.

4. The plate heat exchanger plate with elliptical and truncated cone shaped concave-convex structures according to claim 1, characterized in that: The angle of the elliptical concave-convex structure of the guide area relative to the fluid flow direction is 5°-90°.

5. The plate heat exchanger plate with elliptical and truncated cone shaped concave-convex structures according to claim 1, characterized in that: Each row of the elliptical concave-convex structures in the core heat exchange zone is arranged in a cyclic sequence according to the elliptical depressions (3) and the elliptical protrusions (4), and adjacent rows of elliptical depressions (3) and adjacent rows of elliptical protrusions (4) form a V-shaped layout; Each row of the truncated cone-shaped concave-convex structures is arranged at intervals by truncated cone-shaped depressions (5) and truncated cone-shaped protrusions (6); the cross-sectional shapes of the truncated cone-shaped depressions (5) and the truncated cone-shaped protrusions (6) are circular, oblong or elliptical.

6. A plate heat exchanger plate with an elliptical and truncated cone-shaped concave-convex structure according to claim 1 or 5, characterized in that: Adjacent rows of elliptical concave-convex structures in the core heat exchange zone may form a "<" group and a ">" group; For the "<" group, one or more of the truncated cone-shaped protrusions (6) are located upstream of the elliptical protrusions (4) of the "<" group and downstream of the elliptical depressions (3) of the "<" group, that is, the truncated cone-shaped protrusions (6) are located on the wall surface between the elliptical protrusions (4) of the "<" group and the elliptical depressions (3) of the "<" group; one or more of the truncated cone-shaped depressions (5) are located downstream of the elliptical protrusions (4) of the "<" group and upstream of the elliptical depressions (3) of the "<" group, that is, the truncated cone-shaped depressions (5) are located on the wall surface between the elliptical protrusions (4) of the "<" group and the elliptical depressions (3) of the "<" group.

7. The plate heat exchanger plate with elliptical and truncated cone shaped concave-convex structures according to claim 6, characterized in that: For the ">” group, one or more of the truncated cone-shaped protrusions (6) are located downstream of the elliptical protrusions (4) of the ">” group and upstream of the elliptical depressions (3) of the ">” group, that is, the truncated cone-shaped protrusions (6) are located on the wall surface between the elliptical protrusions (4) of the ">” group and the elliptical depressions (3) of the ">” group; one or more of the truncated cone-shaped depressions (5) are located upstream of the elliptical protrusions (4) of the ">” group and downstream of the elliptical depressions (3) of the ">” group, that is, the truncated cone-shaped depressions (5) are located on the wall surface between the elliptical protrusions (4) of the ">” group and the elliptical depressions (3) of the ">” group.

8. The plate heat exchanger plate with elliptical and truncated cone shaped concave-convex structures according to claim 1, characterized in that: The ratio of the length to the diameter of the elliptical concave-convex structure is 1-10; the ratio of the depth to the diameter of the elliptical depression (3) is 0.1-1; and the ratio of the upper base area to the lower base area of ​​the truncated cone protrusion (6) is 1-5.

9. The plate heat exchanger plate with elliptical and truncated cone shaped concave-convex structures according to claim 1, characterized in that: The ratio of the row spacing or column spacing of the elliptical concave-convex structure in the core heat exchange zone to the length of the elliptical concave-convex structure is 0.5-5.

10. The plate heat exchanger plate with elliptical and truncated cone shaped concave-convex structures according to claim 1, characterized in that: The heat exchanger core can be formed by stacking the plate and the plate rotated 180°.

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