Heat exchange plates, gaskets and heat exchangers

Abstract

The present application provides a heat exchange plate, a sealing gasket, and a heat exchanger. The heat exchange plate comprises: a plate body, the plate body comprising a heat exchange area, a corner hole, and a sealing area disposed around the heat exchange area or the corner hole; the sealing area comprises a sealing groove disposed proximate the heat exchange area or the corner hole and an edge package disposed distally from the heat exchange area or the corner hole; the edge package comprises alternating first wave crests and first wave troughs; the first wave crest is recessed downward on the side distally from the sealing groove to form a second wave crest, the height of the second wave crest being greater than or equal to half the height of the first wave crest; and / or the first wave trough is convex upward on the side distally from the sealing groove to form a second wave trough, the height of the second wave trough being less than or equal to half the height of the first wave crest. The heat exchange plate, sealing gasket, and heat exchanger provided in the present application have a simple structure and can effectively reduce the material elongation at the edge of the plate body, thereby preventing cracking at the edge of the plate, reducing manufacturing difficulty and cost. They are very suitable for the manufacture of high-strength, low-elongation duplex stainless steel heat exchange plates, thereby increasing their service life.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchange plates, and in particular to a heat exchange plate, a sealing gasket and a heat exchanger. Background Art

[0002] The gasket-type detachable plate heat exchanger is composed of multiple stacked and offset heat exchange plates, forming flow channels for cold and hot fluids between the heat exchange plates to achieve heat exchange between the cold and hot fluids. Due to its compact structure, easy maintenance and cleaning, flexible process combination structure, high heat transfer efficiency and low manufacturing cost, its application fields are becoming more and more extensive, especially in high-pressure applications such as petrochemicals and electric power, which put forward higher requirements on the sealing performance of gasket-type detachable plate heat exchangers. Therefore, the development of duplex stainless steel heat exchanger products with high strength, good corrosion resistance and high pressure resistance has become an important research and development direction in recent years. However, for high-strength duplex stainless steel, the edge cold hardening formed after the sheet is uncoiled, and the poor stamping performance compared to conventional stainless steel such as 304 and 316L, etc., cause cracking at the edge of the heat exchanger plate during the manufacturing process. This has become one of the main technical obstacles affecting its stamping quality and restricts its application in detachable plate heat exchanger plates with different structures. Therefore, there is an urgent need for a heat exchanger plate that can effectively reduce the cracking of the plate edge. Summary of the Invention

[0003] In view of this, the purpose of this application is to propose a heat exchange plate, a sealing gasket and a heat exchanger to solve the related problems mentioned in the background technology.

[0004] In a first aspect of the present application, a heat exchange plate is provided, comprising: a plate body, the plate body comprising a heat exchange area, a corner hole, and a sealing area arranged around the heat exchange area or the corner hole, the sealing area comprising a sealing groove arranged near the heat exchange area or the corner hole, and a side bag arranged away from the heat exchange area or the corner hole, the side bag comprising alternatingly arranged first wave peaks and first wave valleys; the first wave peak is recessed downward on a side away from the sealing groove to form a second wave peak, and the height of the second wave peak is greater than or equal to half of the height of the first wave peak; and / or the first wave valley is convex upward on a side away from the sealing groove to form a second wave valley, and the height of the second wave valley is less than or equal to half of the height of the first wave peak.

[0005] Furthermore, the length of the first wave crest is greater than or equal to 5 mm; the length of the first wave trough is greater than or equal to 5 mm.

[0006] Furthermore, the length of the second wave peak is greater than or equal to 2 mm and less than or equal to half the length of the side bag; and / or the length of the second wave valley is greater than or equal to 2 mm and less than or equal to half the length of the side bag.

[0007] Furthermore, the length of the second wave crest is equal to the length of the second wave trough.

[0008] Furthermore, the side bag also includes a plurality of spaced-apart buckle connection areas, the buckle connection areas including a third wave valley and third wave peaks located on both sides of the third wave valley, the height of the third wave peak being equal to the height of the first wave peak; the third wave peak is recessed downward on one side away from the sealing groove to form a fourth wave peak, the height of the fourth wave peak being greater than or equal to half the height of the third wave peak.

[0009] Furthermore, the width of the third wave valley close to the sealing groove is equal to the width of the first wave valley, the width of the third wave valley away from the sealing groove is greater than the width of the third wave valley close to the sealing groove, and the length of the fourth wave peak is greater than the length of the second wave peak.

[0010] Furthermore, the third wave valley protrudes upward on one side away from the sealing groove to form a fourth wave valley, the height of the fourth wave valley is less than or equal to half the height of the third wave peak, and the height difference between the fourth wave valley and the third wave peak is greater than or equal to 2.5 mm.

[0011] The second aspect of the present application provides a sealing gasket for cooperating with the sealing area of ​​the heat exchange plate described in the first aspect above, the sealing area including a sealing groove and a buckle connection area, the sealing gasket including a sealing strip and a plurality of buckles, the sealing strip being used to cooperate with the sealing groove, the buckles being connected to the outer periphery of the sealing strip at intervals, and being used to cooperate with the buckle connection area; the buckles are mountain-shaped buckles, including a first positioning strip connected to the sealing strip, and second positioning strips located on both sides of the first positioning strip and spaced apart, the second positioning strip including a first positioning portion close to the sealing strip and a second positioning portion away from the sealing strip, the thickness of the first positioning portion being greater than the thickness of the second positioning portion.

[0012] Furthermore, the first positioning strip includes a third positioning portion close to the sealing strip and a fourth positioning portion away from the sealing strip, and a width of the fourth positioning portion is greater than a width of the third positioning portion.

[0013] In a third aspect of the present application, a heat exchanger is provided, comprising alternately stacked first heat exchange plates and second heat exchange plates, wherein the first heat exchange plates are the heat exchange plates described in the first aspect above, and the second heat exchange plates are obtained by vertically rotating the first heat exchange plates 180 degrees around the center of the first heat exchange plates; a sealing gasket as described in the second aspect above is provided between adjacent first heat exchange plates and second heat exchange plates.

[0014] As can be seen from the above, the heat exchange plate, sealing gasket and heat exchanger provided by the present application, the heat exchange plate includes a plate body, the plate body includes a heat exchange area and a sealing area arranged around the heat exchange area, the heat exchange area is used for fluid heat exchange, and the sealing area is used for sealing between the heat exchange plates; the sealing area includes a sealing groove arranged close to the heat exchange area and an edge bag arranged away from the heat exchange area, the sealing groove is used to carry the sealing gasket, and the edge bag is used to form an edge support of intermittent contact to ensure the sealing of the heat exchange plate sealing gasket, the edge bag includes alternating first wave peaks and first wave valleys; the side of the first wave peak away from the sealing groove is recessed downward to form a second wave peak, which is equivalent to reducing the wave peak height of the edge, and the expanded length of the corrugation at the edge becomes smaller, that is, the elongation of the material is reduced, making the material easier to stamp and form, thereby avoiding cracking at the edge; by setting the height of the second wave peak to be greater than or equal to half the height of the first wave peak, it is avoided that the drop between the first wave peak and the second wave peak is too large, and the transition slope between the first peak and the second peak is too large, which on the one hand increases the difficulty of forming. The second advantage of this is that the thickness of the first wave trough is less than or equal to half the height of the first wave peak, which can effectively reduce the gap between the first wave trough and the second wave trough, thereby preventing cracking at the edge. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in this application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are merely embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 This is a schematic structural diagram of the first heat exchange plate according to an embodiment of the present application;

[0017] Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle;

[0018] Figure 3 for Figure 1Schematic diagram of the three-dimensional structure at A in the middle;

[0019] Figure 4 for Figure 2 Schematic diagram of the cross section at the middle BB;

[0020] Figure 5 for Figure 2 Schematic diagram of the cross section at CC;

[0021] Figure 6 This is a schematic diagram of the partial structure of the first sealing gasket according to an embodiment of the present application;

[0022] Figure 7 for Figure 6 Schematic diagram of the three-dimensional structure;

[0023] Figure 8 for Figure 6 Gasket and Figure 2 A schematic diagram of the structure of the heat exchange plate;

[0024] Figure 9 for Figure 8 Schematic diagram of the three-dimensional structure;

[0025] Figure 10 This is a schematic diagram of the partial structure of the second heat exchange plate according to an embodiment of the present application;

[0026] Figure 11 This is a schematic diagram of a partial three-dimensional structure of the second sealing gasket according to an embodiment of the present application.

[0027] Figure markings: 1. Plate body; 2. Heat exchange area; 3. Sealing area; 4. Sealing groove; 5. Side bag; 6. Corner hole; 5-1. First wave peak; 5-2. First wave valley; 5-3. Second wave peak; 5-4. Second wave valley; 5-5. Buckle connection area; 5-6. Third wave peak; 5-7. Third wave valley; 5-8. Fourth wave peak; 5-9. Fourth wave valley; 6. Sealing strip; 7. Buckle; 8. First positioning strip; 8-1. Third positioning part; 8-2. Fourth positioning part; 9. Second positioning strip; 9-1. First positioning part; 9-2. Second positioning part; 10. Crossbeam. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of this application more clear, this application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0029] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in the embodiments of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like 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.

[0030] The gasket-type detachable plate heat exchanger is composed of multiple stacked and offset heat exchange plates, forming flow channels for cold and hot fluids between the heat exchange plates to achieve heat exchange between cold and hot fluids. Due to its compact structure, easy maintenance and cleaning, flexible process combination structure, high heat transfer efficiency and low manufacturing cost, its application fields are becoming more and more extensive, especially in high-pressure application fields such as petrochemicals and electric power, which put forward higher requirements on the sealing performance of gasket-type detachable plate heat exchangers.

[0031] In the existing technology, most detachable plate heat exchangers improve the sealing effect of the heat exchange plate by improving the material of the plate sealing groove and sealing gasket or adopting a fully bonded rubber gasket. What's more, some products rely entirely on single-sided welding or double-sided welding to solve the sealing problem of higher pressure conditions. For the full bonding method, the bonding and baking process costs in the product manufacturing process are high, the glue cleaning cost during maintenance is also high, and the cycle is long; for the semi-welding or full-welding method, first, the product cannot be cleaned on one side or both sides, and second, the manufacturing cost is very high, and the cost of replacing spare parts is even higher. This has become a bottleneck for the existing gasket-type detachable plate heat exchanger in many high-pressure working conditions. In addition, the material cost and corrosion resistance of the existing gasket-type detachable plate heat exchanger plates also limit the application of gasket-type detachable plate heat exchangers.

[0032] In the process of realizing this application, it was found that for high-strength, high-corrosion-resistant duplex stainless steel, due to the cold work hardening of the edges formed after the sheet is uncoiled, or tiny burrs appear on the edges, and the poor stamping forming performance compared to conventional stainless steels such as 304 and 316L, the edges will crack when manufacturing detachable plate heat exchanger plates. This has become one of the main technical obstacles affecting its stamping quality, restricting its application in detachable plate heat exchanger plates with different structures. Therefore, there is an urgent need for a heat exchanger plate that can effectively reduce the cracking of the plate edges.

[0033] In order to solve the problem of cracking of the side package of the detachable plate heat exchanger, the relevant technology will set a corrugated structure with a changing slope on the edge of the side package to make the edge forming easier. However, for plates such as duplex stainless steel with high strength and low forming performance, the slope of the side package edge needs to be further reduced to solve the problem of cracking of the plate side package. The design of reducing the slope will be limited by the corrugation pitch and cannot better avoid cracking. Increasing the side package pitch will lead to an increase in the buckle opening, resulting in a decrease in the sealing performance of the heat exchanger. In addition, because the depth of the side package corrugation does not change, and the peak width is smaller as it approaches the edge, the stamping difficulty is still high, which can easily cause forming quality problems, limiting the promotion and application of the above materials in the field of gasket-type detachable plate heat exchangers.

[0034] The following is a specific embodiment and combined with Figures 1 to 11 To describe the technical solution of this application in detail.

[0035] In some embodiments of the present application, a heat exchange plate is provided, such as Figures 1 to 5 As shown, it includes: a plate body 1, the plate body 1 includes a heat exchange area 2, a corner hole 6 and a sealing area 3 arranged around the heat exchange area 2 or the corner hole 6, the sealing area 3 includes a sealing groove 4 arranged near the heat exchange area 2 or the corner hole 6, and a side bag 5 arranged away from the heat exchange area 2 or the corner hole 6, the side bag 5 includes alternating first wave peaks 5-1 and first wave valleys 5-2; the first wave peak 5-1 is recessed downward on a side away from the sealing groove 4 to form a second wave peak 5-3, and the height of the second wave peak 5-3 is greater than or equal to half of the height of the first wave peak 5-1; and / or the first wave valley 5-2 is convex upward on a side away from the sealing groove 4 to form a second wave valley 5-4, and the height of the second wave valley 5-4 is less than or equal to half of the height of the first wave peak 5-1.

[0036] like Figure 1 As shown, the heat exchange plate includes a plate body 1, the shape of the plate body 1 is, for example, rectangular, and the thickness is, for example, 0.4mm-1.0mm, which is not specifically limited; the plate body 1 includes a heat exchange area 2, a corner hole 6 and a sealing area 3 arranged around the heat exchange area 2 or the corner hole 6, the heat exchange area 2 is used for fluid heat exchange, the sealing area 3 is used for sealing between the heat exchange plates, and the four corners of the plate body 1 are provided with corner holes 6 for fluid entry and exit; the sealing area 3 includes a sealing groove 4 arranged near the heat exchange area 2 or the corner hole 6, and an edge bag 5 arranged away from the heat exchange area 2 or the corner hole 6, the sealing groove 4 is used to carry the sealing gasket, and the edge bag 5 is used to form an intermittent contact edge support to ensure the sealing of the heat exchange plate sealing gasket, and the edge bag 5 includes alternating first wave peaks 5-1 and first wave valleys 5-2.

[0037] like Figure 2 and Figure 3As shown, the first wave crest 5-1 is recessed downward on one side away from the sealing groove 4 to form a second wave crest 5-3, which is equivalent to reducing the wave crest height at the edge. The expanded length of the corrugation at the edge becomes smaller, that is, the elongation of the material is reduced, making the material easier to stamp and form, thereby avoiding cracking at the edge. Figure 4 and Figure 5 As shown, H1 represents the height of the first wave peak 5-1, H2 represents the height of the second wave peak 5-3, and H0 represents half of the height of the first wave peak 5-1. By setting the height of the second wave peak 5-3 to be greater than or equal to half of the height of the first wave peak 5-1, it is avoided that the difference in height between the first wave peak 5-1 and the second wave peak 5-3 is too large, which makes the transition slope between the first wave peak 5-1 and the second wave peak 5-3 too large. On the one hand, it increases the difficulty of forming, and on the other hand, it also increases the length of the edge bag 5, thereby increasing the non-heat exchange area of ​​the heat exchange plate and reducing the material utilization rate.

[0038] like Figure 2 and Figure 3 As shown, the first trough 5-2 is convexly formed with a second trough 5-4 on the side away from the sealing groove 4, which is equivalent to reducing the trough depth at the edge. The expanded length of the corrugation at the edge becomes smaller, that is, the elongation of the material is reduced, making the material easier to stamp and form, thereby avoiding cracking at the edge. Figure 4 and Figure 5 As shown, H3 represents the height of the second wave valley 5-4. By setting the height of the second wave valley 5-4 to be less than or equal to half the height of the first wave peak 5-1, it is avoided that the difference in height between the first wave valley 5-2 and the second wave valley 5-4 is too large, which will increase the difficulty of forming on the one hand, and increase the length of the side bag 5 on the other hand, thereby increasing the non-heat exchange area of ​​the heat exchange plate and reducing the material utilization rate.

[0039] This structural design is suitable for high-strength, high-corrosion-resistant, low-cost duplex stainless steel 2205 and 2507 materials. It solves the problem of side bag 5 cracking in the manufacturing of such materials and ensures their sealing, thereby improving the manufacturing quality and service life of such materials, promoting the application of such materials in the field of gasket-type detachable plate heat exchangers, and reducing the manufacturing and maintenance costs of products working in high-pressure and highly corrosive media conditions.

[0040] The heat exchange plate has a simple structure and can effectively reduce the material elongation at the edge of the plate body 1, thereby avoiding cracking of the plate edge, reducing manufacturing difficulty and cost, and is very suitable for the manufacture of high-strength, low-elongation duplex stainless steel heat exchange plates, thereby improving service life.

[0041] In some embodiments, as Figure 3As shown, the side of the first wave crest 5-1 away from the sealing groove 4 is concave downward to form a second wave crest 5-3, and the side of the first wave valley 5-2 away from the sealing groove 4 is convex upward to form a second wave valley 5-4.

[0042] like Figure 3 As shown, the sealing area 3 is provided with a second wave valley 5-4 and a second wave peak 5-3 at the same time, which can further reduce the expanded length of the corrugations at the edge and avoid cracking at the edge.

[0043] In some embodiments, as Figure 10 As shown, the height of the second wave peak 5-3 is equal to the height of the second wave valley 5-4.

[0044] like Figure 10 As shown, the height of the second wave peak 5-3 is set to be equal to the height of the second wave valley 5-4, that is, the height of the second wave peak 5-3 and the height of the second wave valley 5-4 are both equal to half of the height of the first wave peak 5-1, and the second wave peak 5-3 and the second wave valley 5-4 are connected together to form a plane at the edge of the plate body 1; the closer the height of the second wave peak 5-3 and the height of the second wave valley 5-4 are to half of the height of the first wave peak 5-1, the lower the elongation of the material and the better the anti-cracking effect. When the heights of the second wave peak 5-3 and the second wave valley 5-4 are equal, the anti-cracking effect is best.

[0045] In some embodiments, the length of the first wave crest 5 - 1 is greater than or equal to 5 mm; the length of the first wave valley 5 - 2 is greater than or equal to 5 mm.

[0046] The first wave crest 5-1 and the first wave valley 5-2 are used to support the heat exchange plates. Figure 2 As shown, L1 represents the length of the first wave peak 5-1, and L2 represents the length of the first wave valley 5-2. The longer the length, the larger the effective support area. Setting the length of the first wave peak 5-1 ≥ 5mm and the length of the first wave valley 5-2 ≥ 5mm can ensure the support effect of the heat exchange plate.

[0047] In some embodiments, the length of the second wave peak 5-3 is greater than or equal to 2 mm and less than or equal to half the length of the side bag 5; and / or the length of the second wave valley 5-4 is greater than or equal to 2 mm and less than or equal to half the length of the side bag 5.

[0048] like Figure 2As shown, L3 represents the length of the second wave peak 5-3, and L4 represents the length of the second wave valley 5-4. The length of the second wave peak 5-3 and the length of the second wave valley 5-4 are set to be ≥2mm, so as to increase the effective width of the edge with low elongation, avoid insufficient edge sheet material due to incoming material error or stamping positioning error, and ensure the anti-cracking effect of the edge; the length of the edge bag 5 is L1+L3 or L2+L4, and the length of the second wave peak 5-3 and the length of the second wave valley 5-4 are set to be ≤half of the length of the edge bag 5. On the one hand, when the length of the side bag 5 is fixed, the length of the first wave peak 5-1 and the first wave valley 5-2 is avoided to reduce the support effect. On the other hand, the length of the side bag 5 is avoided to be too long, which excessively reduces the effective heat exchange area of ​​the heat exchange plate.

[0049] In some embodiments, the length of the second wave crest 5 - 3 is equal to the length of the second wave trough 5 - 4 .

[0050] like Figure 2 As shown, the lengths of the second wave crest 5-3 and the second wave trough 5-4 are set to be the same, the force is more evenly distributed, the structural stability is improved, and when the length of the side bag 5 is fixed, the lengths of the first wave crest 5-1 and the first wave trough 5-2 are equal, ensuring that the supporting surfaces of the first wave crest 5-1 and the first wave trough 5-2 between the heat exchange plates are more consistent, preventing the crest and the trough from collapsing and deforming when they contact, thereby improving the supporting effect.

[0051] In some embodiments, as Figures 1 to 5 As shown, the side bag 5 also includes a plurality of spaced-apart buckle connection areas 5-5, and the buckle connection area 5-5 includes a third wave valley 5-7 and third wave peaks 5-6 located on both sides of the third wave valley 5-7, and the height of the third wave peak 5-6 is equal to the height of the first wave peak 5-1; the side of the third wave peak 5-6 away from the sealing groove 4 is recessed downward to form a fourth wave peak 5-8, and the height of the fourth wave peak 5-8 is greater than or equal to half the height of the third wave peak 5-6.

[0052] like Figure 1 As shown, a plurality of buckle connection areas 5-5 are provided in the sealing area 3 at intervals. The buckle connection areas 5-5 are used to be plugged in and matched with the buckles 7 of the sealing gasket to play a role of limiting and fixing. Figure 2 and Figure 3 As shown, the buckle connection area 5-5 includes a third wave valley 5-7 and third wave peaks 5-6 located on both sides of the third wave valley 5-7, so as to match the mountain-shaped buckle 7; Figure 4As shown, the height of the third wave peak 5-6 is H4, and the height of the third wave peak 5-6 is the same as the height of the first wave peak 5-1. The third wave peak 5-6 is concave downward on the side away from the sealing groove 4 to form a fourth wave peak 5-8, which is equivalent to reducing the wave peak height at the edge. The expanded length of the corrugation at the edge becomes smaller, that is, the elongation of the material is reduced, making it easier to stamp the material, thereby avoiding cracking at the edge, and setting different heights of wave peaks to cooperate with the buckle 7, which can further improve the limiting effect and improve the stability of the sealing gasket.

[0053] like Figure 5 As shown, H5 represents the height of the fourth wave peak 5-8. By setting the height of the fourth wave peak 5-8 to be greater than or equal to half the height of the third wave peak 5-6, it is avoided that the difference in height between the third wave peak 5-6 and the fourth wave peak 5-8 is too large, which will make the transition slope between the third wave peak 5-6 and the fourth wave peak 5-8 too large. On the one hand, it will increase the difficulty of forming, and on the other hand, it will also increase the length of the edge bag 5, thereby increasing the non-heat exchange area of ​​the heat exchange plate and reducing the material utilization rate; the height of the fourth wave peak 5-8 can be the same as the height of the second wave peak 5-3, which is convenient for design and production.

[0054] In some embodiments, as Figure 2 and Figure 10 As shown, the width of the third wave valley 5-7 close to the sealing groove 4 is equal to the width of the first wave valley 5-2, the width of the third wave valley 5-7 away from the sealing groove 4 is greater than the width of the third wave valley 5-7 close to the sealing groove 4, and the length of the fourth wave peak 5-8 is greater than the length of the second wave peak 5-3.

[0055] like Figure 2 and Figure 10 As shown, the width of the third trough 5-7 on the side close to the sealing groove 4 is W1, and the width of the third trough 5-7 on the side away from the sealing groove 4 is W2. W1 is equal to the width of the first trough 5-2, which is convenient for design and production; setting W2>W1, because the third trough 5-7 is directly connected to the sealing groove 4, setting W1 smaller can make the leakage port of the plate body 1 smaller, which is conducive to ensuring the high pressure performance of the heat exchanger, and setting troughs of different widths to cooperate with the buckle 7 can further improve the limiting effect and improve the stability of the sealing gasket; and because the fourth wave peak 5-8 is One side is connected to the second wave valley 5-4, and the other side is connected to the side of the third wave valley 5-7 away from the sealing groove 4. The height difference at the connection between the fourth wave peak 5-8 and the third wave valley 5-7 is relatively large. Setting W2 to be wider can improve the tensile flow of the material here, so that more material can flow to supplement the fourth wave peak 5-8, reduce the difficulty of stamping, and improve the forming quality. In addition, although increasing W2 reduces the width of the fourth wave peak 5-8, the height difference at the connection between the fourth wave peak 5-8 and the second wave valley 5-4 is relatively small, so the impact on the material flow at this location is small.

[0056] like Figure 2 and Figure 10 As shown, L5 is the length of the fourth wave peak 5-8, L6 is the length of the side of the third wave peak 5-6 away from the sealing groove 4 or the length of the fourth wave valley 5-9, L3 is the length of the second wave peak 5-3, and L4 is the length of the second wave valley 5-4. L5>L3 is set to ensure that the length of L6 is equivalent to that of L4 at the same slope angle, so as to avoid making L6 shorter and reducing the anti-cracking effect.

[0057] In some embodiments, when the plate material is duplex stainless steel, W1 is not less than the trough width of conventional stainless steel 304 and 316L at this location, and W2 is not less than the trough width of general stainless steel at this location, that is, W1 and W2 are both positively correlated with the tensile properties of the plate body 1, ensuring the forming quality.

[0058] In some embodiments, the side of the third wave valley 5-7 away from the sealing groove 4 is at the same height as the side close to the sealing groove 4, so that the thickness of the first positioning part 9-1 of the buckle 7 matched therewith is consistent, thereby improving the connection strength of the first positioning part 9-1 and avoiding breakage.

[0059] In some embodiments, as Figures 2 to 5 As shown, the third wave valley 5-7 protrudes upward on one side away from the sealing groove 4 to form a fourth wave valley 5-9, the height of the fourth wave valley 5-9 is less than or equal to half the height of the third wave peak 5-6, and the height difference between the fourth wave valley 5-9 and the third wave peak 5-6 is greater than or equal to 2.5 mm.

[0060] like Figure 2 and Figure 3 As shown, the third trough 5-7 is convexly formed with a fourth trough 5-9 on the side away from the sealing groove 4, which is equivalent to reducing the trough depth of the edge. The expanded length of the corrugation at the edge becomes smaller, that is, the elongation of the material is reduced, making it easier to stamp the material, thereby avoiding cracking at the edge. In addition, the troughs of different heights are arranged to cooperate with the buckle 7, which can further improve the limiting effect and improve the stability of the sealing gasket. Figure 4 and Figure 5 As shown, H6 represents the height of the fourth wave valley 5-9. By setting the height of the fourth wave valley 5-9 to be less than or equal to half the height of the third wave peak 5-6, it is avoided that the difference between the fourth wave valley 5-9 and the third wave valley 5-7 is too large, which makes the transition slope between the fourth wave valley 5-9 and the third wave valley 5-7 too large. On the one hand, it will increase the difficulty of forming, and on the other hand, it will also increase the length of the side bag 5, thereby increasing the non-heat exchange area of ​​the heat exchange plate and reducing the material utilization rate.

[0061] The height difference between the fourth wave valley 5-9 and the third wave peak 5-6 is set to be ≥2.5mm, so that the thickness of the buckle 7 matched therewith is ≥2.5mm, ensuring the strength of the buckle 7 and preventing it from breaking during manufacturing and use; the height of the fourth wave valley 5-9 is lower than the height of the second wave valley 5-4, further ensuring the thickness of the sealing gasket.

[0062] In some embodiments of the present application, a sealing gasket is provided, such as Figures 6 to 9 as well as Figure 11 As shown, it is used to cooperate with the sealing area 3 of the heat exchange plate described in any of the above embodiments, the sealing area 3 includes a sealing groove 4 and a buckle connection area 5-5, the sealing gasket includes a sealing strip 6 and a plurality of buckles 7, the sealing strip 6 is used to cooperate with the sealing groove 4, the buckles 7 are connected to the outer periphery of the sealing strip 6 at intervals, and are used to cooperate with the buckle connection area 5-5; the buckle 7 is a mountain-shaped buckle 7, including a first positioning strip 8 connected to the sealing strip 6, and a second positioning strip 9 located on both sides of the first positioning strip 8 and spaced apart, the second positioning strip 9 includes a first positioning portion 9-1 close to the sealing strip 6 and a second positioning portion 9-2 away from the sealing strip 6, the thickness of the first positioning portion 9-1 is greater than the thickness of the second positioning portion 9-2.

[0063] The sealing gasket includes a sealing strip 6 and a buckle 7. The sealing strip 6 is, for example, a one-piece structure matched with the sealing groove 4. The buckle 7 is a mountain-shaped buckle 7 matched with the buckle connection area 5-5 of the plate body 1.

[0064] like Figure 6 As shown, the buckle 7 includes a first positioning strip 8 connected to the sealing strip 6, the first positioning strip 8 is used to cooperate with the third wave valley 5-7, and a second positioning strip 9 is provided on both sides of the first positioning strip 8, the second positioning strip 9 is used to cooperate with the third wave peak 5-6, the two second positioning strips 9 and the first positioning strip 8 are connected to the crossbeam 10 to form a mountain-shaped buckle 7.

[0065] The second positioning strip 9 includes a first positioning portion 9-1 close to the sealing strip 6 and a second positioning portion 9-2 away from the sealing strip 6. The thickness of the first positioning portion 9-1 is greater than the thickness of the second positioning portion 9-2. Figures 7 to 9 As shown, the first positioning portion 9-1 is used to cooperate with the third wave crest 5-6, and the second positioning portion 9-2 is used to cooperate with the fourth wave crest 5-8, which has a strong limiting effect and improves the connection stability between the buckle 7 and the plate body 1.

[0066] In some embodiments, as Figures 6 to 9 as well as Figure 11As shown, the first positioning strip 8 includes a third positioning portion 8-1 close to the sealing strip 6 and a fourth positioning portion 8-2 away from the sealing strip 6, and the width of the fourth positioning portion 8-2 is greater than that of the third positioning portion 8-1.

[0067] The first positioning strip 8 includes a third positioning portion 8-1 close to the sealing strip 6 and a fourth positioning portion 8-2 away from the sealing strip 6. The width of the fourth positioning portion 8-2 is greater than the width of the third positioning portion 8-1. Figures 7 to 9 As shown, the third positioning portion 8-1 is used to cooperate with the third wave valley 5-7, and the fourth positioning portion 8-2 is used to cooperate with the fourth wave valley 5-9, which has a strong limiting effect and improves the connection stability between the buckle 7 and the plate body 1.

[0068] In some embodiments, as Figure 11 As shown, the fourth positioning portion 8-2 and the third positioning portion 8-1 have the same thickness, that is, the thickness of the first positioning strip 8 is consistent, which is convenient to manufacture, and the connection strength between the buckle 7 and the sealing strip 6 is high. Figure 11 The seal shown can be used with Figure 10 The heat exchange plates shown are matched.

[0069] In some embodiments, as Figure 7 As shown, the thickness of the third positioning portion 8-1 is greater than that of the fourth positioning portion 8-2, which further enhances the limiting effect and improves the connection stability between the buckle 7 and the plate body 1. Figure 7 The gasket shown can be used with Figure 3 The heat exchange plates shown are matched.

[0070] In some embodiments of the present application, a heat exchanger is provided, comprising alternately stacked first heat exchange plates and second heat exchange plates, wherein the first heat exchange plates are the heat exchange plates described in any of the above embodiments, and the second heat exchange plates are obtained by vertically rotating the first heat exchange plates 180 degrees around the center of the first heat exchange plates; a sealing gasket as described in any of the above embodiments is provided between adjacent first heat exchange plates and second heat exchange plates.

[0071] By stacking the first heat exchange plate and the second heat exchange plate, a meshed combined flow channel can be formed to improve the heat exchange effect; a sealing gasket is provided between the first heat exchange plate and the second heat exchange plate to ensure the sealing effect.

[0072] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. Within the scope of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0073] In addition, when details are set forth to describe exemplary embodiments of the present application, it will be apparent to those skilled in the art that the present application embodiments can be implemented without these details or with variations in these details. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0074] While the present application has been described in conjunction with the embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0075] The embodiments of the present 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 the present application should be included in the scope of protection of this application.

Claims

1. A heat exchange plate, characterized in that: The plate comprises a plate body, the plate body comprising a heat exchange area, a corner hole, and a sealing area arranged around the heat exchange area or the corner hole, the sealing area comprising a sealing groove arranged near the heat exchange area or the corner hole, and a side bag arranged away from the heat exchange area or the corner hole, the side bag comprising first wave crests and first wave troughs arranged alternately; The first wave peak is recessed downward on a side away from the sealing groove to form a second wave peak, and the height of the second wave peak is greater than or equal to half of the height of the first wave peak; and / or the first wave valley is protruded upward on a side away from the sealing groove to form a second wave valley, and the height of the second wave valley is less than or equal to half of the height of the first wave peak.

2. The heat exchange plate according to claim 1, characterized in that The length of the first wave crest is greater than or equal to 5 mm; the length of the first wave valley is greater than or equal to 5 mm.

3. The heat exchange plate according to claim 2, characterized in that: The length of the second wave peak is greater than or equal to 2 mm and less than or equal to half the length of the side bag; and / or the length of the second wave valley is greater than or equal to 2 mm and less than or equal to half the length of the side bag.

4. The heat exchange plate according to claim 3, characterized in that The length of the second wave crest is equal to the length of the second wave trough.

5. The heat exchange plate according to claim 1, characterized in that: The side bag further includes a plurality of spaced-apart buckle connection areas, each of which includes a third wave valley and third wave peaks located on both sides of the third wave valley, wherein the height of the third wave peak is equal to the height of the first wave peak; A side of the third wave peak away from the sealing groove is recessed downward to form a fourth wave peak, and a height of the fourth wave peak is greater than or equal to half of a height of the third wave peak.

6. The heat exchange plate according to claim 5, characterized in that: The width of the third wave valley close to the sealing groove is equal to the width of the first wave valley, the width of the third wave valley away from the sealing groove is greater than the width of the third wave valley close to the sealing groove, and the length of the fourth wave peak is greater than the length of the second wave peak.

7. The heat exchange plate according to claim 5, characterized in that The third wave valley protrudes upward on one side away from the sealing groove to form a fourth wave valley, the height of the fourth wave valley is less than or equal to half the height of the third wave peak, and the height difference between the fourth wave valley and the third wave peak is greater than or equal to 2.5 mm.

8. A sealing gasket for use with the sealing area of ​​the heat exchange plate according to any one of claims 5 to 7, wherein the sealing area comprises a sealing groove and a buckle connection area, characterized in that: The sealing gasket includes a sealing strip and a plurality of buckles, wherein the sealing strip is used to cooperate with the sealing groove, and the buckles are connected to the outer periphery of the sealing strip at intervals and are used to cooperate with the buckle connection area; The buckle is a mountain-shaped buckle, including a first positioning strip connected to the sealing strip, and second positioning strips located on both sides of the first positioning strip and arranged at intervals. The second positioning strip includes a first positioning portion close to the sealing strip and a second positioning portion away from the sealing strip. The thickness of the first positioning portion is greater than the thickness of the second positioning portion.

9. The sealing gasket according to claim 8, characterized in that The first positioning strip includes a third positioning portion close to the sealing strip and a fourth positioning portion away from the sealing strip, and a width of the fourth positioning portion is greater than a width of the third positioning portion.

10. A heat exchanger, characterized in that: It comprises a first heat exchange plate and a second heat exchange plate stacked alternately, wherein the first heat exchange plate is the heat exchange plate according to any one of claims 1 to 7, and the second heat exchange plate is obtained by vertically rotating the first heat exchange plate 180 degrees around the center of the first heat exchange plate; a sealing gasket according to any one of claims 8 to 9 is provided between adjacent first heat exchange plates and second heat exchange plates.

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