Heat exchange plate and heat exchanger composed of same

Abstract

The utility model provides a kind of heat exchange plate and the heat exchanger of its composition, belong to heat exchanger technical field.A kind of heat exchange plate, including body, the body includes first plate body and second plate body of alternative arrangement, first plate body is provided with first heat exchange structure, second heat exchange structure;First heat exchange structure is curved wave, and first heat exchange structure is provided with first connecting mesa at interval on;Second heat exchange structure is straight wave, and second heat exchange structure is provided with second connecting mesa at interval on;First connecting mesa is olive shape, and second connecting mesa is circular;Second plate body is provided with third heat exchange structure, fourth heat exchange structure, and the orientation of third heat exchange structure, fourth heat exchange structure is opposite with first heat exchange structure, second heat exchange structure.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger technology, and in particular to a heat exchange plate and a heat exchanger composed of it. Background Technology

[0002] Plate heat exchangers are a type of heat exchanger formed by alternating stacks of metal plates with specific corrugated shapes. Due to their high heat exchange efficiency, they are widely used in heat pump air conditioning, heating, thermal management and other fields.

[0003] In the prior art, the corrugation pattern of metal sheets is mostly the traditional herringbone corrugation. The top surface of this type of corrugation is a plane with a fixed width, and the connecting surface between the top surface and the bottom surface of the corrugation is an oblique plane at a certain angle to the top or bottom surface.

[0004] The channels formed by stacked plates are usually quite regular, resulting in limited fluid flow complexity and variability, and generally moderate boundary layer disturbance, leading to less than ideal heat transfer performance. Traditional herringbone corrugations often result in parallelogram-shaped weld joints with sharp edges, which can easily cause stress concentration, affecting the strength and lifespan of the heat exchanger. Furthermore, common heat exchanger plate corrugation arrangements are single-corrugated arrays, while the internal fluid heat transfer characteristics are related to the stage of heat transfer; a single arrangement cannot adequately meet the needs of the actual heat transfer process. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a heat exchange plate and a heat exchanger composed thereof.

[0006] The objective of this utility model can be achieved through the following technical solutions: A heat exchange plate includes a body comprising alternating first and second plates. The first plate has a first heat exchange structure and a second heat exchange structure. The first heat exchange structure is corrugated and has first connecting platforms spaced apart. The second heat exchange structure is corrugated and has second connecting platforms spaced apart. The first connecting platforms are olive-shaped, and the second connecting platforms are circular. The second plate has a third and a fourth heat exchange structure, the third and fourth heat exchange structures facing opposite directions to the first and second heat exchange structures. The third heat exchange structure is corrugated and has third connecting platforms spaced apart. The fourth heat exchange structure is entirely corrugated and has fourth connecting platforms spaced apart. When the first and second plates are alternately connected, the first connecting platforms are welded to the third connecting platforms, and the second connecting platforms are welded to the fourth connecting platforms.

[0007] In the heat exchange plate described above, the first connecting platform and the third connecting platform form a first connecting structure, and the second connecting platform and the fourth connecting platform form a second connecting structure. There is a first flow channel between adjacent first connecting structures; there is a second flow channel between adjacent second connecting structures; and the width of the first flow channel is smaller than the width of the second flow channel.

[0008] In the aforementioned heat exchange plate, the first plate and the second plate are respectively provided with an upper flow guiding zone, a main heat transfer zone, and a lower flow guiding zone; in the upper flow guiding zone, there is a second distance B between the centers of the top surfaces of adjacent first heat exchange structures, and in the main heat transfer zone, there is a first distance A between the centers of the top surfaces of adjacent first heat exchange structures, and the second distance B is 0.6-0.9 times the first distance A.

[0009] In the above heat exchange plate, the first heat exchange structure and the second heat exchange structure have an included angle α, and the third heat exchange structure and the fourth heat exchange structure have an included angle β. The included angles α and β are 80-130°, and the included angle α is equal to the included angle β.

[0010] In the heat exchange plates described above, the corrugation depth of the first plate and the second plate is 0.8-2.0 mm.

[0011] In the above heat exchange plate, the top surface width of the first heat exchange structure is 0.5-2.0 mm, and the top surface width of the third heat exchange structure is 0.5-1.0 mm.

[0012] A heat exchanger comprising the aforementioned heat exchange plate.

[0013] Compared with the prior art, this application has the following advantages: This application optimizes the connection contact area between the first and third connecting surfaces, and between the second and third connecting surfaces, thereby enhancing the structural strength and pressure-bearing capacity of the weld points while strengthening the overall structural strength of the plate, thus balancing reliability and cost-effectiveness. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the first plate in this application; Figure 2 This is a schematic diagram of the structure of the second plate in this application; Figure 3 This is a structural diagram showing the location of the weld joints between the first and third heat exchange structures in this application; Figure 4 This is a structural diagram showing the location of the weld joints between the second and fourth heat exchange structures in this application; Figure 5 This is a cross-sectional view of position AA in the main heat transfer zone on the first plate in this application; Figure 6This is a cross-sectional view of the BB position in the upper guide zone of the first plate in this application; In the picture, 100. Upper guide zone; 200. Main heat transfer zone; 300. Lower guide zone; 2. First plate; 21. First heat exchange structure; 211. First connecting platform; 22. Second heat exchange structure; 221. Second connecting platform; 3. Second plate; 31. Third heat exchange structure; 311. Third connecting platform; 32. Fourth heat exchange structure; 321. Fourth connecting platform; 4. First connecting structure; 41. First flow channel; 5. Second connecting structure; 51. Second flow channel. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] like Figures 1 to 4 As shown, a heat exchange plate includes a body, which comprises alternating first plate 2 and second plate 3. The first plate 2 is provided with a first heat exchange structure 21 and a second heat exchange structure 22. The first heat exchange structure 21 is corrugated and has first connecting platforms 211 spaced apart. The second heat exchange structure 22 is corrugated and has second connecting platforms 221 spaced apart. The first connecting platforms 211 are olive-shaped, and the second connecting platforms 221 are circular. The second plate 3 is provided with a third heat exchange structure 31 and a fourth heat exchange structure 321. 2. The third heat exchange structure 31 and the fourth heat exchange structure 32 are oriented opposite to the first heat exchange structure 21 and the second heat exchange structure 22. The third heat exchange structure 31 is corrugated and has third connecting platforms 311 spaced apart. The fourth heat exchange structure 32 is corrugated as a whole and has fourth connecting platforms 321 spaced apart. When the first plate 2 and the second plate 3 are connected alternately, the first connecting platform 211 is welded to the third connecting platform 311, and the second connecting platform 221 is welded to the fourth connecting platform 321.

[0017] The heat exchange plate of this application is structurally optimized based on the traditional flat herringbone corrugated design. By increasing the contact area of ​​the weld points, the second connecting platform 221 and the fourth connecting platform 321 are welded together to form circular weld points. Compared with the traditional parallelogram weld points, the circular weld point structure is more rounded, which can effectively avoid stress concentration problems and significantly improve the structural strength on the refrigerant side. On the other side of the heat exchange plate, the first connecting platform 211 and the third connecting platform 311 are welded together to form olive-shaped weld points. Compared with parallelogram weld points, these weld points are axially symmetrically distributed, which can achieve uniform stress distribution and further optimize the structural stress state.

[0018] It is worth noting that the weld joints formed by the continuous zigzag corrugation design have a significantly increased effective contact area compared to traditional straight herringbone corrugations of the same width. Specifically, under the premise that the core parameters such as wave depth, wave pitch, and wave crest area remain consistent, the structural strength formed by the zigzag corrugations of this application after welding is significantly higher than that of traditional herringbone corrugations, with superior pressure resistance, making it suitable for refrigerant scenarios with higher pressure ratings. If the heat exchanger is required to achieve the same pressure resistance rating, the curved corrugation design of this application can use thinner plate materials, thereby effectively reducing the overall manufacturing cost of the heat exchanger.

[0019] In summary, by optimizing the connection contact area between the first connecting platform 211 and the third connecting platform 311, and between the second connecting platform 221 and the fourth connecting platform 321, this application enhances the structural strength and pressure-bearing performance of the weld points while simultaneously strengthening the overall structural strength of the plate, thus balancing reliability and cost-effectiveness.

[0020] Specifically, the first connecting platform 211 and the third connecting platform 311 form a first connecting structure 4, and the second connecting platform 221 and the fourth connecting platform 321 form a second connecting structure 5. There is a first flow channel 41 between adjacent first connecting structures 4; there is a second flow channel 51 between adjacent second connecting structures 5; the width of the first flow channel 41 is smaller than the width of the second flow channel 51.

[0021] In this application, the second connecting structure 5 is circular, and the first connecting structure 4 is roughly olive-shaped.

[0022] Specifically, the first plate 2 and the second plate 3 are respectively provided with an upper guide zone 100, a main heat transfer zone 200, and a lower guide zone 300; in the upper guide zone 100, there is a second distance B between the top center of adjacent first heat exchange structures 21, and in the main heat transfer zone, there is a first distance A between the top center of adjacent first heat exchange structures 21, and the second distance B is 0.6-0.9 times the first distance A.

[0023] In this application, within the main heat transfer zone 200, the first heat exchange structure 21, the second heat exchange structure 22, the third heat exchange structure 31, and the fourth heat exchange structure 32 all adopt a herringbone corrugated design.

[0024] Specifically, the first heat exchange structure 21 and the second heat exchange structure 22 have an included angle α, and the third heat exchange structure 31 and the fourth heat exchange structure 32 have an included angle β. The included angles α and β are between 80° and 130°, and the included angle α is equal to the included angle β. During the design process, the included angles α and β need to be selected to be the same.

[0025] Specifically, the corrugation depth E of the first plate 2 and the second plate 3 is 0.8-2.0 mm.

[0026] Specifically, the main body width C of the first heat exchange structure 21 is 0.5-2mm.

[0027] This application designs two different widths that coexist on the first plate 2. For example, the first heat exchange structure 21 with a width of 1 mm and the first heat exchange structure 21 with a width of 2 mm. Of course, 0.5 mm, 0.75 mm, 1.5 mm, etc. can also be selected.

[0028] A heat exchanger comprising the aforementioned heat exchange plate.

[0029] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture, as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0030] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Meanwhile, the word "and / or" throughout the text means including three solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0031] All of the above components are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0032] The specific embodiments described herein are merely illustrative examples of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from this utility model or exceeding the scope defined by the appended claims.

Claims

1. A heat exchange plate, characterized in that, The system includes a main body comprising alternating first plate (2) and second plate (3). The first plate (2) is provided with a first heat exchange structure (21) and a second heat exchange structure (22). The first heat exchange structure (21) is corrugated, and a first connecting platform (211) is spaced apart on the first heat exchange structure (21). The second heat exchange structure (22) is corrugated, and a second connecting platform (221) is spaced apart on the second heat exchange structure (22). The first connecting platform (211) is olive-shaped, and the second connecting platform (221) is circular. The second plate (3) is provided with a third heat exchange structure (31) and a fourth heat exchange structure (32). The orientation of the structure (31) and the fourth heat exchange structure (32) is opposite to that of the first heat exchange structure (21) and the second heat exchange structure (22); the third heat exchange structure (31) is corrugated, and a third connecting platform (311) is provided at intervals on the third heat exchange structure (31); the fourth heat exchange structure (32) is corrugated as a whole, and a fourth connecting platform (321) is provided at intervals on the fourth heat exchange structure (32); wherein, when the first plate (2) and the second plate (3) are connected alternately in sequence, the first connecting platform (211) is welded to the third connecting platform (311), and the second connecting platform (221) is welded to the fourth connecting platform (321).

2. The heat exchange plate according to claim 1, characterized in that, The first connecting platform (211) and the third connecting platform (311) form a first connecting structure (4), and the second connecting platform (221) and the fourth connecting platform (321) form a second connecting structure (5). There is a first flow channel (41) between adjacent first connecting structures (4); there is a second flow channel (51) between adjacent second connecting structures (5); the width of the first flow channel (41) is smaller than the width of the second flow channel (51).

3. The heat exchange plate according to claim 1, characterized in that, The first plate (2) and the second plate (3) are respectively provided with an upper guide zone (100), a main heat transfer zone (200) and a lower guide zone (300); in the upper guide zone (100), there is a second distance B between the top center of adjacent first heat exchange structures (21); in the main heat transfer zone (200), there is a first distance A between the top center of adjacent first heat exchange structures (21); the second distance B is 0.6-0.9 times the first distance A.

4. The heat exchange plate according to claim 1, characterized in that, The first heat exchange structure (21) and the second heat exchange structure (22) have an included angle α, and the third heat exchange structure (31) and the fourth heat exchange structure (32) have an included angle β. The included angles α and β are 80-130°, and the included angle α is equal to the included angle β.

5. The heat exchange plate according to claim 1, characterized in that, The corrugation depth of the first plate (2) and the second plate (3) is 0.8-2.0 mm.

6. The heat exchange plate according to claim 1, characterized in that, The top surface width of the first heat exchange structure (21) is 0.5-2.0 mm, and the top surface width of the third heat exchange structure is 0.5-1.0 mm.

7. A heat exchanger, characterized in that, Includes the heat exchange plate described in any one of claims 1-6.

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