Heat exchange plate, gasket and heat exchanger

Abstract

The application provides a heat exchange plate, a sealing gasket and a heat exchanger. The heat exchange plate comprises a plate body, a plurality of turbulence protrusions are arranged at intervals in the plate body, a supporting protrusion is arranged on the turbulence protrusion, and the sum of the height of the supporting protrusion and the height of the turbulence protrusion is a total depth. The plate body is also provided with a sealing groove for accommodating the sealing gasket. The sealing groove comprises a first sub-groove, a second sub-groove and a third sub-groove which are connected. The first sub-groove is located in a sealing area of the plate body, the second sub-groove is located in a two-sealing area of the plate body, and the third sub-groove is located in a two-non-sealing area of the plate body. The depth of the first sub-groove is equal to half of the total depth, the depth of the second sub-groove is less than half of the total depth, and the depth of the third sub-groove is greater than half of the total depth. The heat exchange plate, the sealing gasket and the heat exchanger provided by the application have the advantages of simple structure, convenient processing, long service life, long maintenance period and low cost.

Description

Technical Field

[0001] This application relates to the field of heat exchanger technology, and more particularly to a heat exchange plate, a gasket, and a heat exchanger. Background Technology

[0002] Gasket-type removable plate heat exchangers consist of multiple stacked and abutting heat exchange plates, forming channels for cold and hot fluids between the plates to achieve heat exchange. They have a simple structure, high heat transfer efficiency, and are easy to maintain, and their applications are becoming increasingly widespread. In applications with high solid content and prone to clogging, such as fuel ethanol and sugar refining, a wide-spacing gasket-type removable plate heat exchanger is gradually replacing the earlier wide-channel welded plate heat exchanger in order to reduce manufacturing costs and facilitate regular disassembly and cleaning.

[0003] However, for this type of wide-spacing detachable plate heat exchanger, blockages often occur at the inlet and outlet of the flow channel on the plate. The sealing groove in the relevant technology adopts a bottom sealing structure or a middle sealing structure design. Assuming the total depth of the plate is L1, after the heat exchanger is formed, the depth of the flow channel at the inlet and outlet is also L1. In order to ensure the passage of solid-liquid mixtures with larger particle sizes, support protrusions are usually set on the turbulence protrusions in the heat exchange zone of the plate to ensure a greater depth of the direct flow channel. Assuming the height of the support protrusion is H2, the maximum depth of the direct flow channel in the heat exchange zone is 2H2. Since 2H2 is greater than L1, the depth of the flow channel at the inlet and outlet is less than the depth of the direct flow channel in the heat exchange zone. Therefore, it is easy to cause blockage of the fluid at the inlet and outlet, resulting in a very short maintenance cycle for the operating products.

[0004] Meanwhile, for this type of wide-spacing detachable plate heat exchanger, leakage is prone to occur at the second sealing area of ​​the plate, resulting in insufficient sealing performance. In related technologies, the heat exchange plate is equipped with support protrusions, making L1 larger. Multiple protrusions are spaced apart at the second sealing area of ​​the heat exchange plate. The height of the protrusions also increases with the increase of L1. While meeting the stamping quality requirements of the protrusions, the interval between adjacent protrusions also becomes longer, resulting in a larger exposed side area of ​​the sealing groove at the second sealing area. Therefore, leakage is prone to occur, resulting in low sealing performance. Thicker plates are needed to compensate for the lack of sealing performance, ultimately leading to high manufacturing and maintenance costs for the product.

[0005] Therefore, there is an urgent need for a heat exchange plate that can effectively improve the blockage phenomenon while also addressing the leakage problem. Summary of the Invention

[0006] In view of this, the purpose of this application is to provide a heat exchange plate, a sealing gasket, and a heat exchanger to solve the related problems mentioned in the background art.

[0007] In a first aspect, this application provides a heat exchange plate, including a plate body. The plate body has a plurality of spaced-apart turbulence protrusions inside, and each turbulence protrusion has a supporting protrusion. The sum of the heights of the supporting protrusions and the turbulence protrusions is the total depth. The plate body also has a sealing groove for accommodating a sealing gasket. The sealing groove includes a first sub-groove, a second sub-groove, and a third sub-groove connected together. The first sub-groove is located in a first sealing area of ​​the plate body, the second sub-groove is located in a second sealing area of ​​the plate body, and the third sub-groove is located in a second non-sealing area of ​​the plate body. The depth of the first sub-groove is equal to half of the total depth, the depth of the second sub-groove is less than half of the total depth, and the depth of the third sub-groove is greater than half of the total depth.

[0008] Furthermore, the sum of the depth of the second sub-slot and the depth of the third sub-slot is equal to the total depth.

[0009] Furthermore, the second sub-slot includes a second A slot near the turbulence protrusion and a second B slot away from the turbulence protrusion, and a plurality of spaced first protrusions are connected between the second A slot and the second B slot; a blocking protrusion is provided on the side of the second A slot away from the turbulence protrusion and / or on the side of the second B slot near the turbulence protrusion, and the blocking protrusion is located between two adjacent first protrusions.

[0010] Furthermore, the third sub-slot includes a third A slot near the turbulence protrusion and a third B slot away from the turbulence protrusion, and a plurality of spaced first grooves are connected between the third A slot and the third B slot; a blocking groove is provided on the side of the third A slot away from the turbulence protrusion and / or on the side of the third B slot near the turbulence protrusion, and the blocking groove is located between two adjacent first grooves.

[0011] Furthermore, the sum of the height of the blocking protrusion and the bottom height of the second sub-groove is less than the total depth; the sum of the depth of the blocking groove and the depth of the third sub-groove is less than the total depth.

[0012] Furthermore, the height of the blocking protrusion is equal to the depth of the blocking groove.

[0013] Furthermore, the plate body includes two double-sealed areas and two double-unsealed areas, the two double-sealed areas being arranged opposite each other along the length direction of the plate body, and the two double-unsealed areas being arranged opposite each other along the length direction of the plate body.

[0014] A second aspect of this application provides a sealing gasket for cooperating with a heat exchange plate as described in the first aspect above. The sealing gasket includes a first sub-gasket and a second sub-gasket connected together. The first sub-gasket is used to cooperate with a first sub-groove, and the second sub-gasket is used to cooperate with a second sub-groove. The thickness of the first sub-gasket is greater than the thickness of the second sub-gasket.

[0015] A third aspect of this application provides a heat exchanger comprising a plurality of stacked heat exchange plates as described in the first aspect above, wherein a sealing gasket as described in the second aspect above is provided between adjacent heat exchange plates.

[0016] Furthermore, the sealing gasket is an elastic sealing gasket, the compression ratio of the first sub-gasket at the first sub-groove is a first compression ratio, the compression ratio of the second sub-gasket at the second sub-groove is a second compression ratio, and the first compression ratio is less than or equal to the second compression ratio.

[0017] As can be seen from the above description, the heat exchange plate, sealing gasket, and heat exchanger provided in this application include a heat exchange plate body. The interior of the plate body has multiple spaced-apart turbulence protrusions used to agitate the fluid for heat exchange. Supporting protrusions are provided on the turbulence protrusions to increase the depth of the direct current channel. The plate body also has a sealing groove for accommodating the sealing gasket. The sealing groove includes a first sub-groove, a second sub-groove, and a third sub-groove connected together. The first sub-groove is located in the first sealing area of ​​the plate body, the second sub-groove is located in the second sealing area of ​​the plate body, and the third sub-groove is located in the second non-sealing area of ​​the plate body. The sum of the heights of the supporting protrusions and the turbulence protrusions is the total depth. The depth of the first sub-groove is set to be equal to half of the total depth to ensure that the sealing gasket is in the first... The design ensures sealing at the sub-slots and provides a foundation for the flip-up and rotational assembly of the heat exchange plates to form a heat exchanger. The second sub-slot has a depth less than half the total depth, while the third sub-slot has a depth greater than half the total depth. This ensures that, regardless of the assembly method, the depth of the flow channel in the second non-sealed area is greater than that in related technologies, thus improving clogging. Simultaneously, the depth of the complete sealed cavity in the second sealing area is smaller than that in related technologies, resulting in a smaller exposed side area of ​​the sealed cavity and improving leakage. The heat exchange plate, gasket, and heat exchanger have a simple structure, are easy to manufacture, are not prone to clogging or leakage, have a long service life, long maintenance cycles, and low cost. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of a heat exchange plate in an embodiment of this application;

[0020] Figure 2 for Figure 1 A schematic diagram of the planar structure of the heat exchange plate;

[0021] Figure 3 for Figure 2 Enlarged structural diagram at point X;

[0022] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at the EE point;

[0023] Figure 5 for Figure 2 A magnified structural diagram at point Y in the middle;

[0024] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure at the FF point;

[0025] Figure 7 for Figure 2 Enlarged structural diagram at point Z;

[0026] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure at point GG;

[0027] Figure 9 This is a schematic diagram of the structure of a sealing gasket in an embodiment of this application;

[0028] Figure 10 This is a schematic cross-sectional view of a heat exchanger in a sealing zone according to an embodiment of this application;

[0029] Figure 11 This is a schematic diagram of the cross-sectional structure of a heat exchanger in the two sealed areas and two unsealed areas according to an embodiment of this application.

[0030] Reference numerals in the attached drawings: 1. Plate; 2. Turbulence protrusion; 3. Support protrusion; 4. Sealing groove; 4-1. First sub-groove; 4-2. Second sub-groove; 4-2-1. Second A groove; 4-2-2. Second B groove; 4-3. Third sub-groove; 4-3-1. Third A groove; 4-3-2. Third B groove; 5. Blocking protrusion; 6. Blocking groove; 7. Sealing gasket; 7-1. First sub-gasket; 7-2. Second sub-gasket; 8. First protrusion; 9. First groove. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0032] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] Gasket-type removable plate heat exchangers consist of multiple stacked and abutting heat exchange plates, forming channels for cold and hot fluids between the plates to achieve heat exchange. They have a simple structure, high heat transfer efficiency, and are easy to maintain, and their applications are becoming increasingly widespread. In applications with high solid content and prone to clogging, such as fuel ethanol and sugar refining, a wide-spacing gasket-type removable plate heat exchanger is gradually replacing the earlier wide-channel welded plate heat exchanger in order to reduce manufacturing costs and facilitate regular disassembly and cleaning.

[0034] However, for this type of wide-spacing detachable plate heat exchanger, blockages often occur at the inlet and outlet of the plate's flow channels, and leaks are also prone to occur at the second seal of the plate, resulting in insufficient sealing performance. Typically, the maximum design pressure is only 1.0 MPa. Therefore, there is an urgent need for a heat exchange plate that can effectively improve the blockage and leakage phenomena.

[0035] In the process of developing this application, it was discovered that the blockage phenomenon is caused by the fact that the sealing groove in the related technology adopts a bottom sealing structure or a middle sealing structure design. Assuming the total depth of the plate is L1, the sealing groove depth of the bottom sealing structure is L1, while the sealing groove depth of the middle sealing structure is 0.5L1. Regardless of the sealing structure used, after the heat exchanger is formed, the depth of the flow channel at the inlet and outlet is L1. Usually, in order to ensure the passage of solid-liquid mixtures with larger particle sizes, support protrusions are set on the turbulence protrusions in the heat exchange zone of the plate to ensure a greater depth of the direct flow channel. Assuming the height of the support protrusion is H2, the maximum depth of the direct flow channel in the heat exchange zone is 2H2. Since 2H2 is greater than L1, the depth of the flow channel at the inlet and outlet is less than the depth of the direct flow channel in the heat exchange zone. Therefore, it is easy for the fluid to be blocked at the inlet and outlet, resulting in a very short maintenance cycle for the operating product. It is possible to consider increasing the depth of the sealing groove in the second non-sealing zone. This would result in a greater depth of the flow channel in the second non-sealing zone, even greater than 2H2, thereby improving the blockage phenomenon.

[0036] Furthermore, the leakage is caused by the increased size of L1 due to the support protrusions. Multiple protrusions are spaced apart in the secondary sealing area of ​​the heat exchange plate, and their height increases with L1. While meeting the stamping quality requirements of the protrusions, the spacing between adjacent protrusions also becomes longer, resulting in a larger exposed side area of ​​the sealing groove in the secondary sealing area. This makes leakage more likely, leading to lower sealing performance and requiring thicker plates to compensate for the insufficient sealing performance, ultimately resulting in high manufacturing and maintenance costs. A possible solution is to reduce the depth of the sealing groove in the secondary sealing area, forming a shallower, less deep, complete sealing cavity than L1, thus reducing the exposed area of ​​the sealing cavity. Simultaneously, blocking protrusions and blocking grooves can be installed in the sealing grooves of both the secondary sealing area and the secondary non-sealing area, further reducing the exposed side area of ​​the plate after assembly at the secondary seal, and making the exposure gap much smaller than L1, thereby improving the leakage phenomenon.

[0037] The following describes specific embodiments in conjunction with... Figures 1 to 11 The technical solution of this application will be described in detail below.

[0038] Some embodiments of this application provide a heat exchange plate, such as Figures 1 to 8As shown, the device includes a plate 1, the interior of which is provided with a plurality of spaced-apart turbulence protrusions 2. Each turbulence protrusion 2 is provided with a support protrusion 3. The sum of the heights of the support protrusions 3 and the heights of the turbulence protrusions 2 is the total depth. The plate 1 is also provided with a sealing groove 4, which is used to accommodate a sealing gasket 7. The sealing groove 4 includes a first sub-groove 4-1, a second sub-groove 4-2, and a third sub-groove 4-3 connected together. The first sub-groove 4-1 is located in the first sealing area of ​​the plate 1, the second sub-groove 4-2 is located in the second sealing area of ​​the plate 1, and the third sub-groove 4-3 is located in the second non-sealing area of ​​the plate 1. The depth of the first sub-groove 4-1 is equal to half of the total depth, the depth of the second sub-groove 4-2 is less than half of the total depth, and the depth of the third sub-groove 4-3 is greater than half of the total depth.

[0039] like Figure 1 and Figure 2 As shown, the heat exchange plate includes a plate body 1, with the L direction being the length direction of the plate body 1. The interior of the plate body 1 has multiple spaced-apart turbulence protrusions 2, which are used to agitate the fluid for heat exchange. Supporting protrusions 3 are provided on the turbulence protrusions 2, which are used to increase the depth of the direct current channel, such as... Figure 4 As shown, the height of the turbulence protrusion 2 is H1, the height of the support protrusion 3 is H2, and the sum of the height of the support protrusion 3 and the height of the turbulence protrusion 2 is the total depth L1, that is, L1 = H1 + H2. In the figure, L2 is half of the total depth, that is, L2 = 0.5L1.

[0040] like Figure 1 and Figure 2 As shown, the plate 1 is also provided with a sealing groove 4, which is used to accommodate the sealing gasket 7. The sealing groove 4 includes a first sub-groove 4-1, a second sub-groove 4-2, and a third sub-groove 4-3 connected together. The first sub-groove 4-1 is located in a sealing area of ​​the plate 1, as shown in the figure. Figure 2 The middle X area is the first sealing area, located on the outer periphery of plate 1. The second sub-groove 4-2 is located in the second sealing area of ​​plate 1, such as... Figure 2 The middle Y region, also known as the second sealing zone, is located between a set of corner holes and the heat exchange zone. The third sub-slot 4-3 is located in the second non-sealing zone of plate 1. Figure 2 The middle Z region, also known as the second non-sealed region, is located between another set of corner holes and the heat exchange zone. Through the cooperation of the first sub-groove 4-1 and the second sub-groove 4-2 with the sealing gasket 7, a flow channel connecting the corner holes can be formed on the plate 1.

[0041] like Figure 3 and Figure 4As shown, the depth of the first sub-groove 4-1 is D1. Setting the depth of the first sub-groove 4-1 to be equal to half the total depth, i.e., D1 = L2, ensures the sealing performance of the sealing gasket 7 at the first sub-groove 4-1 and provides a basis for the heat exchange plates to be flipped and rotated to form a heat exchanger. Rotational assembly, for example, involves rotating the plate body 1 of one heat exchange plate 1 180° around a direction perpendicular to the plate body 1 before assembling it with another heat exchange plate. Flipping assembly, for example, involves first rotating the plate body 1 of one heat exchange plate 1 180° around a direction perpendicular to the plate body 1, then flipping it 180° around its length before assembling it with another heat exchange plate. Figure 10 As shown, both assembly methods result in a sealing cavity with a depth of 2D1, or L1, at the sealing zone.

[0042] like Figure 5 and Figure 6 As shown, the depth of the second sub-slot 4-2 is D2. The depth of the second sub-slot 4-2 is set to be less than half the total depth, i.e., D2 < L2. Figure 7 and Figure 8 As shown, the depth of the third sub-groove 4-3 is D3, which is greater than half the total depth, i.e., D3 > L2. For the flip assembly method, the depth of the formed flow channel in the second non-sealed area is 2D3, which is greater than L1; for the rotation assembly method, as shown... Figure 11 As shown, the depth of the formed flow channel in the second non-sealed area is D5, which is D3+L1-D2, and is also greater than L1. Therefore, regardless of the assembly method, the depth of the formed flow channel in the second non-sealed area will be greater than the flow channel depth in related technologies, and may even be greater than the depth 2H2 of the flow channel in the heat exchange zone, thereby improving the clogging phenomenon and extending the cleaning cycle.

[0043] Meanwhile, for the flip assembly method, the depth of the formed complete sealed cavity at the second sealing zone is 2D2, which is less than L1; for the rotation assembly method, such as Figure 11 As shown, the depth of the formed complete sealed cavity in the second non-sealing area is D6, which is D2+L1-D3, and is also less than L1. Therefore, regardless of the assembly method, the depth of the formed complete sealed cavity in the second sealing area is smaller than the sealing cavity depth in related technologies, resulting in a smaller exposed side area of ​​the sealed cavity, thereby improving leakage and enhancing product safety. In addition, because the sealing cavity depth is smaller, the corresponding sealing gasket 7 can be thinner, thus saving material costs.

[0044] The heat exchange plate has a simple structure, is easy to process, is not prone to clogging or leakage, has a long service life, is easy to rotate or flip for assembly, has a long maintenance cycle, and is low in cost.

[0045] In some embodiments, the sum of the depth of the second sub-slot 4-2 and the depth of the third sub-slot 4-3 is equal to the total depth.

[0046] The sum of the depths of the second sub-groove 4-2 and the third sub-groove 4-3 equals the total depth, i.e., D2+D3=L1. This facilitates design, ensuring that regardless of whether a flip assembly or a rotation assembly is used, the depth of the flow channel in the two non-sealing areas is 2D3, and the depth of the sealing cavity in the two sealing areas is 2D2, thus ensuring consistent flow. At the same time, designing D2+D3=L1 ensures that the upper and lower cross-sectional shapes of the sealing gasket 7 are consistent, avoiding inconsistencies in the sealing gasket 7 under the two assembly methods, which would require two different structural sealing gaskets 7 and increase costs.

[0047] In some embodiments, such as Figure 5 and Figure 6 As shown, the second sub-slot 4-2 includes a second A slot 4-2-1 near the turbulence protrusion 2 and a second B slot 4-2-2 away from the turbulence protrusion 2. A plurality of spaced first protrusions 8 are connected between the second A slot 4-2-1 and the second B slot 4-2-2. A blocking protrusion 5 is provided on the side of the second A slot 4-2-1 away from the turbulence protrusion 2 and / or on the side of the second B slot 4-2-2 near the turbulence protrusion 2. The blocking protrusion 5 is located between two adjacent first protrusions 8.

[0048] like Figure 5 As shown, the second sub-slot 4-2 includes a second A slot 4-2-1 near the turbulence protrusion 2 and a second B slot 4-2-2 away from the turbulence protrusion 2. A plurality of first protrusions 8 are connected between the second A slot 4-2-1 and the second B slot 4-2-2.

[0049] like Figure 5 and Figure 6 As shown, the second A groove 4-2-1 away from the turbulence protrusion 2 and the second B groove 4-2-2 near the turbulence protrusion 2 are provided with blocking protrusions 5. The blocking protrusions 5 are located between two adjacent first protrusions 8, as shown. Figure 11 As shown, by setting the blocking protrusion 5, the side exposure area of ​​the formed sealing cavity can be further reduced, the leakage space is smaller, thereby improving the sealing level, improving the safety of product use, and reducing manufacturing costs.

[0050] Furthermore, the sealing gasket 7 is installed in the sealing groove 4 of the heat exchange plate. The sealing effect is achieved by the compression of adjacent heat exchange plates, causing the sealing gasket 7 to fill the sealing groove 4. However, the pressure on both sides of the sealing groove 4 is different. One side, being in contact with the fluid, bears the fluid pressure, while the other side, not in contact with the fluid, does not bear the fluid pressure. This difference in pressure on both sides of the sealing groove 4 results in a different pressure on both sides of the sealing gasket 7. The portion of the sealing gasket 7 near the non-pressurized side of the sealing groove 4 experiences less pressure, leading to less contact friction and a tendency for the sealing gasket 7 to slide towards the non-pressurized side. Additionally, the sidewall of the sealing groove 4 is not continuous but features alternating ridges. In the case of the ridge, the sidewall of the sealing groove 4 has a supporting surface, which can restrain the deformation of the sealing gasket 7 when it is compressed and improve the contact friction. Even if the two sides of the sealing gasket 7 are under different pressure, it can also play a certain compensating role. However, the sidewall of the sealing groove 4 in the valley has no supporting surface. This means that the sealing gasket 7 in the valley is not restrained by the sidewall of the sealing groove 4. In addition, the two sides of the sealing gasket 7 are under different pressure. The contact friction of the sealing gasket 7 on the uncompressed side without a supporting surface is small and there is no restraint. It is particularly prone to slippage and leakage. In particular, after the strength of the sealing gasket 7 decreases after a certain period of use, leakage is more likely to occur, causing safety accidents.

[0051] For the second sub-slot 4-2, one side of the second B slot 4-2-2 is a corner hole, which is a pressurized side because it is in contact with the heat exchange fluid, while the other side is a closed area, which is a non-pressurized side because it is not in contact with the heat exchange fluid. One side of the second A slot 4-2-1 is a heat exchange area, which is a pressurized side because it is in contact with the heat exchange fluid, while the other side is a closed area, which is a non-pressurized side because it is not in contact with the heat exchange fluid. The closed area is provided with first protrusions 8 at intervals, so that the non-pressurized side walls of the second B slot 4-2-2 and the second A slot 4-2-1 are discontinuous. A non-pressurized side without support surface will be formed between adjacent first protrusions 8. By setting blocking protrusions 5 on the side of the second A slot 4-2-1 away from the turbulence protrusion 2 and the side of the second B slot 4-2-2 close to the turbulence protrusion 2, a supporting surface can be formed to prevent the sealing gasket 7 from sliding, thereby further improving the sealing level and improving the safety of product use.

[0052] In some embodiments, such as Figure 7 and Figure 8 As shown, the third sub-slot 4-3 includes a third A slot 4-3-1 near the turbulence protrusion 2 and a third B slot 4-3-2 away from the turbulence protrusion 2. A plurality of spaced first grooves 9 are connected between the third A slot 4-3-1 and the third B slot 4-3-2. A blocking groove 6 is provided on the side of the third A slot 4-3-1 away from the turbulence protrusion 2 and / or on the side of the third B slot 4-3-2 near the turbulence protrusion 2. The blocking groove 6 is located between two adjacent first grooves 9.

[0053] like Figure 7 As shown, the third sub-slot 4-3 includes a third A slot 4-3-1 near the turbulence protrusion 2 and a third B slot 4-3-2 away from the turbulence protrusion 2. A plurality of first grooves 9 are connected between the third A slot 4-3-1 and the third B slot 4-3-2.

[0054] like Figure 7 and Figure 8 As shown, the third A groove 4-3-1, on the side away from the turbulence protrusion 2, and the third B groove 4-3-2, on the side near the turbulence protrusion 2, are provided with blocking grooves 6. The blocking grooves 6 are located between two adjacent first grooves 9, and the principle is the same as described above. Figure 11 As shown, by setting the blocking groove 6, the side exposure area of ​​the formed sealing cavity can be further reduced after the plate is assembled, the leakage space is smaller, and it can also act as a support surface to prevent the sealing gasket 7 from sliding, thereby improving the sealing level and improving the safety of product use.

[0055] Furthermore, when the heat exchange plate is provided with both the first protrusion 8 and the first groove 9, for the sealing cavity formed by the rotation assembly method, the first protrusion 8 and the first groove 9 will block the unsupported surface on the non-pressure side at the same time. For the sealing cavity formed by the flip assembly method, there will be two first protrusions 8 or two first grooves 9 blocking the unsupported surface on the non-pressure side at the same time, which further improves the sealing effect.

[0056] In some embodiments, such as Figure 6 and Figure 8 As shown, the sum of the height of the blocking protrusion 5 and the bottom height of the second sub-groove 4-2 is less than the total depth; the sum of the depth of the blocking groove 6 and the depth of the third sub-groove 4-3 is less than the total depth.

[0057] like Figure 6 As shown, the height of the blocking protrusion 5 is H3, and the bottom height of the second sub-slot 4-2 is H4. The sum of the height of the blocking protrusion 5 and the bottom height of the second sub-slot 4-2 is set to be less than the total depth, i.e., H3 + H4 < L1. Figure 11 As shown, when forming a complete sealed cavity, the contact points of the two heat exchange plates between the second B groove 4-2-2 and the second A groove 4-2-1 are closer to the sealing gasket 7, resulting in stronger resistance to deformation. When H3+H4=L1, the contact points are furthest from the sealing gasket 7, making them prone to deformation, resulting in poor sealing performance. It is also more difficult to stamp and form the plates, making them more prone to cracking.

[0058] like Figure 8 As shown, the depth of the blocking groove 6 is D4. The sum of the depth of the blocking groove 6 and the depth of the third sub-groove 4-3 is set to be less than the total depth, i.e., D3 + D4 < L1. Figure 11As shown, similarly, when forming a complete sealed cavity, the contact points of the two heat exchange plates between the second B groove 4-2-2 and the second A groove 4-2-1 are closer to the sealing gasket 7, and the deformation resistance is stronger; when D3+D4=L1, the contact points are farthest from the sealing gasket 7, which makes it easy to deform, resulting in poor sealing effect, difficulty in forming, and easy cracking.

[0059] In some embodiments, the height of the blocking protrusion 5 is equal to the depth of the blocking groove 6.

[0060] The height of the blocking protrusion 5 is, for example, 1mm to 3mm, and is not specifically limited. The height of the blocking protrusion 5 is set to be equal to the depth of the blocking groove 6, i.e., H3 = D4, which facilitates the design. Whether it is a rotation assembly or a flip assembly, it can ensure that the contact surfaces of adjacent heat exchange plates are aligned between the second B groove 4-2-2 and the second A groove 4-2-1, ensuring the support effect and preventing the heat exchange plates from collapsing.

[0061] In some embodiments, such as Figure 1 and Figure 2 As shown, the plate 1 includes two double-sealed areas and two double-unsealed areas. The two double-sealed areas are arranged opposite each other along the length direction of the plate 1, and the two double-unsealed areas are arranged opposite each other along the length direction of the plate 1.

[0062] The plate 1 includes two double-sealed areas and two double-unsealed areas. The two double-sealed areas are arranged opposite each other along the length of the plate 1, and the two double-unsealed areas are also arranged opposite each other along the length of the plate 1. In this way, the heat exchange plate can be assembled by flipping or rotating.

[0063] In some embodiments of this application, a sealing gasket 7 is provided, such as... Figure 9 As shown, for use with the heat exchange plate as described in any of the above embodiments, the sealing gasket 7 includes a first sub-gasket 7-1 and a second sub-gasket 7-2 connected together. The first sub-gasket 7-1 is used to cooperate with the first sub-groove 4-1, and the second sub-gasket 7-2 is used to cooperate with the second sub-groove 4-2. The thickness of the first sub-gasket 7-1 is greater than the thickness of the second sub-gasket 7-2.

[0064] like Figure 9 As shown, the sealing gasket 7 includes a connected sub-gasket and a second sub-gasket 7-2, as... Figure 10 As shown, the first sub-pad 7-1 is used to install within the first sub-slot 4-1, as... Figure 11 As shown, the second sub-gasket 7-2 is used to install in the second sub-groove 4-2. The thickness of the first sub-gasket 7-1 is set to be greater than the thickness of the second sub-gasket 7-2 to ensure that the second sub-gasket 7-2 fits into the second sub-groove 4-2, thereby ensuring a sealing effect.

[0065] In some embodiments, such as Figure 11 As shown, the second sub-pad 7-2 is provided with a recessed structure, which is used to cooperate with the first protrusion 8 and the first groove 9 to limit the sealing pad 7 and further prevent the sealing pad 7 from slipping.

[0066] In some embodiments of this application, a heat exchanger is provided, such as... Figure 10 and Figure 11 As shown, it includes multiple stacked heat exchange plates as described in any of the above embodiments, with a sealing gasket 7 as described in any of the above embodiments provided between two adjacent heat exchange plates.

[0067] This heat exchanger has a simple structure, is easy to manufacture, is not prone to clogging or leakage, has a long service life, a long maintenance cycle, and low cost.

[0068] In some embodiments, the sealing gasket 7 is an elastic sealing gasket, the compression ratio of the first sub-gasket 7-1 at the first sub-groove 4-1 is a first compression ratio, the compression ratio of the second sub-gasket 7-2 at the second sub-groove 4-2 is a second compression ratio, and the first compression ratio is less than or equal to the second compression ratio.

[0069] The compression ratio of the first sub-pad 7-1 at the first sub-groove 4-1 is a first compression ratio, for example, 20%; the compression ratio of the second sub-pad 7-2 at the second sub-groove 4-2 is a second compression ratio, for example, 23%. The first compression ratio is set to be less than or equal to the second compression ratio, for example, the second compression ratio minus the first compression ratio is 0% to 10%, and the specific value is not limited.

[0070] When assembling the heat exchanger, because of the alternating flow channels for hot and cold fluids, the back of the heat exchange plate where the first sub-slot 4-1 is located has a sealing gasket 7, while the back of the heat exchange plate where the second sub-slot 4-2 is located does not have a sealing gasket 7, i.e., it is in a suspended state. In order to compensate for the pressure capacity here, the first compression ratio can be designed to be smaller than the second compression ratio, increasing the compression force at the sealing gasket in the second sub-slot 4-2, thereby improving the sealing effect. The size of the compression ratio can be adjusted by the area ratio of the cross-sectional area of ​​the sealing gasket 7 to the cross-sectional area of ​​the sealing groove 4. The larger the area ratio, the larger the compression ratio, which will not be elaborated here.

[0071] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application (including the claims) is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in the details for the sake of brevity.

[0072] Furthermore, given that details have been set forth to describe exemplary embodiments of this application, it will be apparent to those skilled in the art that embodiments of this application may be practiced without these details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0073] Although this application has been described in conjunction with embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.

[0074] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A heat exchange plate, characterized in that, The plate includes a plate body, the interior of which is provided with a plurality of spaced-apart turbulence protrusions, and the turbulence protrusions are provided with support protrusions, the sum of the height of the support protrusions and the height of the turbulence protrusions being the total depth; The plate body is also provided with a sealing groove for accommodating a sealing gasket. The sealing groove includes a first sub-groove, a second sub-groove, and a third sub-groove connected together. The first sub-groove is located in the first sealing area of ​​the plate body, the second sub-groove is located in the second sealing area of ​​the plate body, and the third sub-groove is located in the second non-sealing area of ​​the plate body. The depth of the first sub-groove is equal to half of the total depth, the depth of the second sub-groove is less than half of the total depth, and the depth of the third sub-groove is greater than half of the total depth.

2. The heat exchange plate according to claim 1, characterized in that, The sum of the depth of the second sub-slot and the depth of the third sub-slot is equal to the total depth.

3. The heat exchange plate according to claim 1, characterized in that, The second sub-slot includes a second A slot near the turbulence protrusion and a second B slot away from the turbulence protrusion, and a plurality of spaced first protrusions are connected between the second A slot and the second B slot; The second A groove is provided with a blocking protrusion on the side away from the turbulence protrusion and / or the second B groove is provided with a blocking protrusion on the side close to the turbulence protrusion, and the blocking protrusion is located between two adjacent first protrusions.

4. The heat exchange plate according to claim 3, characterized in that, The third sub-slot includes a third A slot close to the turbulence protrusion and a third B slot away from the turbulence protrusion, and a plurality of spaced first grooves are connected between the third A slot and the third B slot. The third A groove is provided on the side away from the turbulence protrusion and / or the third B groove is provided on the side close to the turbulence protrusion, and the blocking groove is located between two adjacent first grooves.

5. The heat exchange plate according to claim 4, characterized in that, The sum of the height of the blocking protrusion and the bottom height of the second sub-groove is less than the total depth; the sum of the depth of the blocking groove and the depth of the third sub-groove is less than the total depth.

6. The heat exchange plate according to claim 5, characterized in that, The height of the blocking protrusion is equal to the depth of the blocking groove.

7. The heat exchange plate according to claim 1, characterized in that, The plate includes two double-sealed areas and two double-unsealed areas. The two double-sealed areas are arranged opposite each other along the length of the plate, and the two double-unsealed areas are arranged opposite each other along the length of the plate.

8. A sealing gasket, characterized in that, For use with the heat exchange plate according to any one of claims 1-7, the sealing gasket includes a first sub-gasket and a second sub-gasket connected together, the first sub-gasket being used to mate with the first sub-groove, the second sub-gasket being used to mate with the second sub-groove, and the thickness of the first sub-gasket being greater than the thickness of the second sub-gasket.

9. A heat exchanger, characterized in that, It includes a plurality of stacked heat exchange plates as described in any one of claims 1-7, with a sealing gasket as described in claim 8 provided between two adjacent heat exchange plates.

10. The heat exchanger according to claim 9, characterized in that, The sealing gasket is an elastic sealing gasket. The compression ratio of the first sub-gasket at the first sub-groove is a first compression ratio, and the compression ratio of the second sub-gasket at the second sub-groove is a second compression ratio. The first compression ratio is less than or equal to the second compression ratio.

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