Heat exchange plate sealing gasket and heat exchanger

Abstract

The present application provides a sealing gasket for a heat exchange plate and a heat exchanger, wherein a sealing groove is provided on the heat exchange plate, one side of the sealing groove being a pressure side in contact with the heat exchange fluid, and the other side being a non-pressure side not in contact with the heat exchange fluid. A first ridge and a first valley are alternately arranged on the heat exchange plate outside the non-pressure side. The sealing gasket comprises: a base portion, which is a one-piece structure and cooperates with the sealing groove; and a compensation portion, which is a one-piece structure and is arranged on the base portion. The cross-sectional area of ​​the compensation portion located between the cross-sectional centerline of the base portion and the non-pressure side is a first cross-sectional area, the first cross-sectional area of ​​the compensation portion near the first valley is a first area, and the first cross-sectional area of ​​the compensation portion near the first ridge is a second area, wherein the first area is greater than the second area. The sealing gasket for a heat exchange plate and the heat exchanger provided by the present application have a simple structure and are easy to process. By differentially arranging the compensation portion, the local normal contact pressure and anti-slip capability of the sealing gasket are improved, resulting in a good sealing effect and a long service life.

Description

Technical Field

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

[0002] A plate heat exchanger is composed of multiple stacked heat exchange plates, with sealing gaskets used between the heat exchange plates to form flow channels for cold and hot fluids, thereby achieving intermittent heat exchange between the cold and hot fluids. It has a simple structure and high heat transfer efficiency, and has been widely used. As the application scope of plate heat exchangers continues to expand, the working conditions are becoming more and more harsh, especially under high temperature and high pressure conditions. Sealing leakage of plate heat exchangers has become a common technical problem, and the structural form of the sealing gasket will have a very important impact on the sealing performance.

[0003] The sealing gasket is installed in the sealing groove of the heat exchange plate. The sealing gasket is filled with the sealing groove through the extrusion of the adjacent heat exchange plates to achieve the sealing effect. Figure 4 As shown, the two sides of the sealing groove are usually subjected to different pressures. For example, in the sealing groove of the straight sealing section, one side is the heat exchange area, which is in contact with the heat exchange fluid and will be subjected to the pressure of the fluid, while the other side is the side package area, which is not in contact with the heat exchange fluid and will not be subjected to the pressure of the fluid. This makes the pressures on the two sides of the sealing groove different, and the pressures on the two sides of the corresponding sealing gasket are different. The part of the sealing gasket close to the non-pressure side of the sealing groove is less because it is under less pressure and the contact friction force generated is also less, which makes the sealing gasket tend to slide toward the non-pressure side; and the side wall of the sealing groove is not continuous. For example, alternating ridges and valleys will be set in the side packing area and the heat exchange area. The side wall of the sealing groove at the ridge has a support surface, which can restrain the deformation of the sealing gasket when it is compressed, increase the contact friction, and have a certain compensation effect even if the pressure on both sides of the sealing gasket is different; while the side wall of the sealing groove at the valley has no support surface, which results in the sealing gasket in the valley not being constrained by the side wall of the sealing groove. In addition, the pressure on both sides of the sealing gasket is different, and the contact friction of the sealing gasket on the non-pressure side without a support surface is small, which is particularly prone to slippage and leakage. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a sealing gasket for a heat exchange plate and a heat exchanger to solve the related problems mentioned in the background technology.

[0005] In a first aspect of the present application, a sealing gasket for a heat exchange plate is provided, wherein a sealing groove is provided on the heat exchange plate, one side of the sealing groove is a pressure side in contact with the heat exchange fluid, and the other side is a non-pressure side that does not contact the heat exchange fluid, and a first ridge and a first valley are alternately arranged on the heat exchange plate outside the non-pressure side, and the sealing gasket is a one-piece structure corresponding to the sealing groove, and is used to be installed in the sealing groove to seal the sealing groove, and the sealing gasket includes: a base part, which is a one-piece structure and cooperates with the sealing groove; a compensation part, which is a one-piece structure and is arranged on the base part; wherein the cross-sectional area of ​​the compensation part located between the cross-sectional center line of the base part and the non-pressure side is a first cross-sectional area, the first cross-sectional area of ​​the compensation part close to the first valley is a first area, and the first cross-sectional area of ​​the compensation part close to the first ridge is a second area, and the first area is larger than the second area.

[0006] Furthermore, second ridges and second valleys are alternately arranged on the heat exchange plate outside the pressure side, the cross-sectional area of ​​the compensation portion located between the cross-sectional center line of the base portion and the pressure side is the second cross-sectional area, the second cross-sectional area of ​​the compensation portion close to the second valley is the third area, and the second cross-sectional area of ​​the compensation portion close to the second ridge is the fourth area, and the third area is greater than or equal to the fourth area.

[0007] Furthermore, the first area is greater than or equal to the third area, and the second area is greater than or equal to the fourth area.

[0008] Furthermore, the first area is 1.2-1.8 times the second area, the third area is 1-1.5 times the fourth area, the first area is 1-1.5 times the third area, and the second area is 1-1.5 times the fourth area.

[0009] Furthermore, the thickness of the sealing gasket is 1.2-1.8 times the depth of the sealing groove, the cross-sectional area of ​​the sealing gasket is 1.1-1.4 times the cross-sectional area of ​​the sealing groove, and the ratio of the cross-sectional area of ​​the compensation portion to the cross-sectional area of ​​the base portion is 0.1-0.4.

[0010] Furthermore, the thickness of the compensation portion is equal, the width of the compensation portion located between the cross-sectional center line of the base portion and the non-compressed side is the non-compressed width, the non-compressed width of the compensation portion close to the first valley is the first width, and the non-compressed width of the compensation portion close to the first ridge is the second width, and the first width is greater than the second width.

[0011] Furthermore, the compensation portion includes two protrusions, which are respectively located on both sides of the cross-sectional centerline of the base portion, and the width of the protrusion located between the cross-sectional centerline of the base portion and the non-pressurized side is the non-pressurized width.

[0012] Furthermore, a balancing portion is provided on the base portion, the balancing portion is connected to the bottoms of the two protruding portions, and the thickness of the balancing portion is lower than the thickness of the protruding portions.

[0013] Furthermore, the sealing gasket is divided into a straight sealing section, a corner hole sealing section and a two-line sealing section according to the corresponding position of the sealing groove; the area ratio of the cross-sectional area of ​​the straight sealing section to the cross-sectional area of ​​the sealing groove at the corresponding position is a first area ratio, the area ratio of the cross-sectional area of ​​the corner hole sealing section to the cross-sectional area of ​​the sealing groove at the corresponding position is a second area ratio, and the area ratio of the cross-sectional area of ​​the two-line sealing section to the cross-sectional area of ​​the sealing groove at the corresponding position is a third area ratio, and the first area ratio is equal to the second area ratio and is less than the third area ratio; or, the thickness of the straight sealing section is the same as the thickness of the corner hole sealing section, and the thickness of the two-line sealing section is greater than the thickness of the straight sealing section.

[0014] In a second aspect of the present application, a heat exchanger is provided, comprising a plurality of stacked heat exchange plates, wherein a sealing gasket for the heat exchange plates as described in the first aspect above is provided between two adjacent heat exchange plates.

[0015] As can be seen from the above, the sealing gasket for the heat exchange plate and the heat exchanger provided by the present application are provided with a one-piece structure corresponding to the sealing groove, which is used to be installed in the sealing groove to seal the heat exchange plate; a base portion is provided to fill the sealing groove, and a compensation portion is provided on the base portion, which can reduce the overall contact area between the top of the sealing gasket and the heat exchange plate, increase the compression force on the sealing gasket, and thus improve the sealing effect, and achieve sealing of the heat exchange plate under a smaller clamping force; the cross-sectional area of ​​the compensation portion located between the cross-sectional center line of the base portion and the non-pressure side is the first cross-sectional area, and the compensation portion close to the first valley is the second cross-sectional area. The first cross-sectional area of ​​is the first area, and the first cross-sectional area of ​​the compensation portion close to the first ridge is the second area. The first area is larger than the second area, so that the cross-sectional area of ​​the compensation portion on the non-pressure side without a support surface is larger. The larger the cross-sectional area, the greater the compression force on the sealing gasket at this position, thereby increasing the normal contact pressure and contact friction at this position, reducing the sliding deformation of the sealing gasket, and solving the problem of sealing gasket slippage and leakage; the sealing gasket for the heat exchange plate and the heat exchanger have a simple structure and are easy to process. Through the differentiated setting of the compensation portion, the local normal contact pressure and anti-slip ability of the sealing gasket are improved, the sealing effect is good, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 Schematic diagram of the overall structure of the sealing gasket;

[0018] Figure 2 Schematic diagram of the assembly of heat exchange plate and sealing gasket;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the sealing groove and the sealing gasket at the ridge;

[0020] Figure 4 for Figure 2 Schematic diagram of the appearance structure at D in the middle;

[0021] Figure 5 for Figure 2 Schematic diagram of the structure viewed from above at D in the middle;

[0022] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure in the AA direction at the first and second ridges;

[0023] Figure 7 for Figure 5 Schematic diagram of the cross-sectional structure in the BB direction at the first and second valleys;

[0024] Figure 8 This is a schematic diagram of a partial top view of the structure of the first type of sealing gasket;

[0025] Figure 9 Schematic diagram of a partial top view of the second type of sealing gasket;

[0026] Figure 10 Schematic diagram of a partial top view of the structure of the third type of sealing gasket;

[0027] Figure 11 is a partial top view structural diagram of the fourth type of sealing gasket;

[0028] Figure 12 for Figure 8 Schematic diagram of the cross-sectional structure in the C1-C1 direction;

[0029] Figure 13 for Figure 9 Schematic diagram of the cross-sectional structure in the C2-C2 direction;

[0030] Figure 14 for Figure 10Schematic diagram of the cross-sectional structure in the C3-C3 direction;

[0031] Figure 15 for Figure 11 Schematic diagram of the cross-sectional structure in the C4-C4 direction.

[0032] Figure markings: 1. heat exchange plate; 1-1. corner hole; 1-2. heat exchange area; 1-3. sealing groove; 1-3-1. pressure side; 1-3-2. non-pressure side; 1-4. first ridge; 1-5. first valley; 1-6. second ridge; 1-7. second valley; 2. sealing gasket; 2-1. straight sealing section; 2-2. corner hole sealing section; 2-3. second sealing section; 3. base portion; 4. compensation portion; 4-1. raised portion; 5. balancing portion. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] A plate heat exchanger is composed of multiple stacked heat exchange plates, with sealing gaskets used between the heat exchange plates to form flow channels for cold and hot fluids, thereby achieving wall-to-wall heat exchange between the cold and hot fluids. It has a simple structure and high heat transfer efficiency, and has been widely used. As the application scope of plate heat exchangers continues to expand, the working conditions are becoming more and more harsh, especially under high temperature and high pressure conditions. Sealing leakage of plate heat exchangers has become a common technical problem, which puts higher requirements on the sealing effectiveness of plate heat exchangers, and the structural form of the sealing gasket will have a very important impact on the sealing performance.

[0036] The sealing gasket is installed in the sealing groove of the heat exchange plate. The sealing gasket is compressed and filled with the sealing groove by the extrusion of the adjacent heat exchange plates to achieve the sealing effect. Figure 4As shown, the two sides of the sealing groove 1-3 are usually subjected to different pressures. For example, the sealing groove 1-3 in the straight sealing area has a heat exchange area 1-2 on one side. Because it contacts the heat exchange fluid, it will bear the pressure of the fluid, while the other side is the side package area. Because it does not contact the heat exchange fluid, it will not bear the pressure of the fluid. This makes the two sides of the sealing groove 1-3 subjected to different pressures, and the corresponding two sides of the sealing gasket 2 are subjected to different pressures. The part of the sealing gasket 2 close to the non-pressure side 1-3-2 of the sealing groove 1-3 is subjected to less pressure, and the contact friction force generated is also small, which makes the sealing gasket 2 tend to slide toward the non-pressure side 1-3-2; and the side walls of the sealing groove 1-3 are not continuous. For example, the side package area and the heat exchange area 1-2 are provided with a cross-section. The side walls of the sealing groove 1-3 at the ridges have support surfaces, which can restrain the deformation of the sealing gasket 2 when it is compressed, thereby increasing the contact friction and achieving a certain compensation effect even if the pressures on both sides of the sealing gasket 2 are different. However, the side walls of the sealing groove 1-3 at the valleys have no support surfaces, which results in the sealing gasket 2 at the valleys not being constrained by the side walls of the sealing groove 1-3. In addition, the pressures on both sides of the sealing gasket 2 are different, and the contact friction of the sealing gasket 2 at the non-pressure side 1-3-2 without a support surface is small and there is no constraint, which makes it particularly prone to slippage and leakage. In particular, after the strength of the sealing gasket 2 decreases after a certain period of use, it is more likely to leak, causing production safety accidents.

[0037] The cross section of the sealing gasket 2 is as follows: Figure 3As shown, it is usually divided into a base portion 3 and a compensation portion 4. The base portion 3 is used to fill the sealing groove 1-3. The compensation portion 4 can reduce the overall contact area with the heat exchange plate 1 above the sealing gasket 2, thereby increasing the compression force exerted on the sealing gasket 2 and ensuring the sealing effect. In the process of realizing this application, it was found that the existing compensation portion 4 is axially symmetrically distributed along the cross-sectional center line Z of the base portion 3. The cross-sectional areas and compression ratios of the compensation portions 4 on both sides of the cross-sectional center line Z are the same, that is, the compression forces exerted on both sides of the top of the sealing gasket 2 are the same, and therefore the pressure difference on both sides of the sealing gasket 2 cannot be balanced; and along the extension direction of the sealing gasket 2, the compensation portion 4 is evenly distributed. The cloth cannot balance the difference in constraints on the sealing gasket 2 caused by whether the sealing groove 1-3 has a support surface or not, so the sealing gasket 2 is more likely to slip at the position without a support surface on the non-pressure side 1-3-2; in some embodiments, for applications with higher pressure, in order to prevent the sealing gasket 2 from slipping and causing leakage at the position without a support surface, the sealing gasket 2 will be designed with a larger area ratio or thickness to increase the compression force, so as to increase the contact friction and normal contact pressure. However, such a design will also increase the compression force of the sealing gasket 2 at the position with a support surface, causing the sealing gasket 2 in this area to be over-compressed, thereby reducing the service life of the sealing gasket 2. Therefore, it is possible to consider differentially designing the cross-sectional area of ​​the compensation part 4 to balance the force on the sealing gasket 2, and only increase the cross-sectional area of ​​the compensation part 4 at the non-pressure side 1-3-2 without a support surface, thereby increasing the compression force of the sealing gasket 2 at this position, thereby increasing the normal contact pressure and contact friction, reducing the sliding deformation of the sealing gasket 2, and solving the problem of slip leakage of the sealing gasket 2.

[0038] Below, through specific embodiments and combined Figures 1 to 15 To describe the technical solution of this application in detail.

[0039] In some embodiments of the present application, a sealing gasket 2 for a heat exchange plate 1 is provided, such as Figures 1 to 7As shown, the heat exchange plate 1 is provided with a sealing groove 1-3, one side of the sealing groove 1-3 is a pressure side 1-3-1 that contacts the heat exchange fluid, and the other side is a non-pressure side 1-3-2 that does not contact the heat exchange fluid. The heat exchange plate 1 outside the non-pressure side 1-3-2 is alternately arranged with first ridges 1-4 and first valleys 1-5. The sealing gasket 2 is a one-piece structure corresponding to the sealing groove 1-3 and is used to be installed in the sealing groove 1-3 to seal the sealing groove 1-3. The sealing gasket 2 includes: a base portion 3 is a one-piece structure, which cooperates with the sealing groove 1-3; the compensation part 4 is a one-piece structure, which is arranged on the base part 3; wherein, the cross-sectional area of ​​the compensation part 4 located between the cross-sectional center line of the base part 3 and the non-pressure side 1-3-2 is the first cross-sectional area, the first cross-sectional area of ​​the compensation part 4 close to the first valley 1-5 is the first area, and the first cross-sectional area of ​​the compensation part 4 close to the first ridge 1-4 is the second area, and the first area is larger than the second area.

[0040] like Figures 2 to 4 As shown, the two sides of the sealing groove 1-3 are usually subjected to different pressures. The sealing groove 1-3 can be divided into a straight sealing area, a corner hole sealing area and a second sealing area according to its position on the heat exchange plate 1.

[0041] like Figure 2 As shown in area D in the middle, the sealing groove 1-3 in the straight sealing area has a heat exchange area 1-2 on one side. Since it contacts the heat exchange fluid and will be subjected to the pressure of the fluid, this side is the pressure side 1-3-1; and the other side is the side package area. Since it does not contact the heat exchange fluid and will not be subjected to the pressure of the fluid, this side is the non-pressure side 1-3-2.

[0042] The sealing groove 1-3 in the corner hole sealing area has a corner hole 1-1 on one side. The corner hole 1-1 is the inlet and outlet of the heat exchange fluid. Because it contacts the heat exchange fluid, it will be subjected to the pressure of the fluid, so this side is the pressure side 1-3-1; and the other side is the side package area. Because it does not contact the heat exchange fluid and will not be subjected to the pressure of the fluid, this side is the non-pressure side 1-3-2.

[0043] There are two sealing grooves 1-3 in the second sealing area. Among them, for the sealing groove 1-3 close to the corner hole 1-1, one side is the corner hole 1-1. Because it contacts the heat exchange fluid, it will bear the pressure of the fluid, so this side is the pressure side 1-3-1, and the other side is a closed area. Because it does not contact the heat exchange fluid, it will not bear the pressure of the fluid, so this side is the non-pressure side 1-3-2; for the sealing groove 1-3 close to the heat exchange area 1-2, one side is the heat exchange area 1-2. Because it contacts the heat exchange fluid, it will bear the pressure of the fluid, so this side is the pressure side 1-3-1, and the other side is a closed area. Because it does not contact the heat exchange fluid, it will not bear the pressure of the fluid, so this side is the non-pressure side 1-3-2.

[0044] like Figure 4 As shown, the side walls of the sealing groove 1-3 are not continuous, and ridges and valleys are alternately arranged on the outside of the side walls. The side walls of the sealing groove 1-3 at the ridges have support surfaces, which can play a restraining role for the sealing gasket 2. When the sealing gasket 2 is compressed, it can prevent the sealing gasket 2 from deforming and increase the contact friction force. The side walls of the sealing groove 1-3 at the valleys have no support surfaces and cannot play a restraining role for the sealing gasket 2.

[0045] like Figure 1 As shown, the sealing gasket 2 is a one-piece annular structure corresponding to the overall shape of the sealing groove 1-3 of the heat exchange plate 1, and is used to be installed in the sealing groove 1-3 to seal the heat exchange plate 1.

[0046] like Figure 3 As shown, it is a schematic cross-sectional structure diagram of the sealing groove 1-3 and the sealing gasket 2. The base portion 3 and the compensation portion 4 are integrally formed and the material can be EPDM rubber.

[0047] The base portion 3 is provided to cooperate with the sealing groove 1 - 3 and is used to fill the sealing groove 1 - 3 when the sealing gasket 2 is compressed to prevent leakage.

[0048] The compensation portion 4 is, for example, a raised structure, which is not specifically limited. By arranging the compensation portion 4 on the base portion 3, the contact area between the top of the sealing gasket 2 and the heat exchange plate 1 can be reduced, thereby increasing the compression force on the sealing gasket 2 and thereby improving the sealing effect. The heat exchange plate 1 can be sealed under a smaller clamping force.

[0049] The compensation part 4 is a one-piece structure, which is convenient for processing. The compensation part 4 is provided between the cross-sectional center line of the base part 3 and the non-pressure side 1-3-2, which can increase the compressive stress of the non-pressure side 1-3-2 and balance the pressure difference on both sides of the sealing gasket 2.

[0050] like Figure 3 As shown, Z is the cross-sectional centerline of the base portion 3, and the cross-sectional area of ​​the compensation portion 4 located between the cross-sectional centerline of the base portion 3 and the non-pressure side 1-3-2 is the first cross-sectional area. The first cross-sectional area is A1 in the figure, which represents the cross-sectional area of ​​the compensation portion 4 located on the non-pressure side 1-3-2.

[0051] like Figure 4 and Figure 5 As shown, Z is the cross-sectional center line of the base portion 3. The left side of the figure is the edge package area, and the right side is the heat exchange area 1-2. The valleys and ridges in the edge package area are the corresponding first valleys 1-5 and first ridges 1-4.

[0052] like Figure 7 Shown Figure 5Schematic diagram of the cross-sectional structure in the middle BB direction, where Z is the cross-sectional centerline of the base portion 3, and the first cross-sectional area of ​​the compensation portion 4 near the first valley 1-5 is the first area. The first area is S1 in the figure, which represents the cross-sectional area of ​​the compensation portion 4 located on the non-pressure side 1-3-2 without a support surface.

[0053] like Figure 6 Shown Figure 5 Schematic diagram of the cross-sectional structure in the middle AA direction, where Z is the cross-sectional centerline of the base portion 3, and the first cross-sectional area of ​​the compensation portion 4 close to the first ridge 1-4 is the second area. The second area, namely S2 in the figure, represents the cross-sectional area of ​​the compensation portion 4 located on the non-pressure side 1-3-2 with the support surface.

[0054] The first area is larger than the second area, that is, S1>S2. The area of ​​S1 is increased, so that the cross-sectional area of ​​the compensation part 4 located on the non-pressure side 1-3-2 without a support surface is larger. The larger the cross-sectional area, the greater the compression force on the sealing gasket 2 at this position, thereby increasing the normal contact pressure and contact friction at this position. A large normal contact pressure can prevent the heat exchange fluid from rushing out of the contact surface between the compensation part 4 and the heat exchange plate 1 to cause leakage. A large contact friction can prevent the sealing gasket 2 from sliding deformation at this position, thereby solving the problem of sliding leakage of the sealing gasket 2.

[0055] Correspondingly, the cross-sectional area of ​​the compensation portion 4 located at the support surface on the non-pressure side 1-3-2 is smaller. Due to the constraint of the support surface, this position does not require a large internal stress. Excessive internal stress will accelerate the aging rate of the sealing gasket 2 and reduce its service life. By reducing the area of ​​S2, the compressive force on the sealing gasket 2 at this position is reduced, the compressive stress at this position is reduced, and the service life of the sealing gasket 2 is increased.

[0056] The cross-sectional area of ​​the compensation portion 4 can be adjusted by changing the thickness, width or cross-sectional shape of the compensation portion 4, which is not specifically limited.

[0057] Viewed along the extension direction of the sealing gasket 2, the first cross-sectional area A1 of the compensation portion 4 located on the non-pressure side 1-3-2 increases and decreases alternately, making the overall force on the sealing gasket 2 more uniform, which can reduce the clamping force when assembling the sealing gasket 2 and the heat exchange plate 1, and facilitates disassembly and maintenance.

[0058] The sealing gasket 2 for the heat exchange plate 1 has a simple structure and is easy to process. By differentially arranging the compensation portion 4, the local normal contact pressure and anti-slip capability of the sealing gasket 2 are improved, resulting in a good sealing effect and a long service life.

[0059] In some embodiments, as Figures 3 to 7As shown, second ridges 1-6 and second valleys 1-7 are alternately arranged on the heat exchange plate 1 outside the pressure side 1-3-1, the cross-sectional area of ​​the compensation portion 4 located between the cross-sectional center line of the base portion 3 and the pressure side 1-3-1 is the second cross-sectional area, the second cross-sectional area of ​​the compensation portion 4 close to the second valley 1-7 is the third area, and the second cross-sectional area of ​​the compensation portion 4 close to the second ridge 1-6 is the fourth area, and the third area is larger than the fourth area.

[0060] like Figure 3 As shown, the cross-sectional area of ​​the compensation portion 4 located between the cross-sectional center line of the base portion 3 and the pressure side 1-3-1 is the second cross-sectional area. The second cross-sectional area is A2 in the figure, which represents the cross-sectional area of ​​the compensation portion 4 located on the pressure side 1-3-1.

[0061] like Figure 4 and Figure 5 As shown in the figure, the left side is the edge package area, and the right side is the heat exchange area 1-2. Then the valley and ridge of the heat exchange area 1-2 are the corresponding second valley 1-7 and second ridge 1-6.

[0062] like Figure 7 As shown, the second cross-sectional area of ​​the compensation portion 4 close to the second valley 1-7 is the third area. The third area is S3 in the figure, which represents the cross-sectional area of ​​the compensation portion 4 located on the pressure side 1-3-1 without a support surface.

[0063] like Figure 6 As shown, the second cross-sectional area of ​​the compensation portion 4 close to the second ridge 1-6 is the fourth area. The fourth area is S4 in the figure, which represents the cross-sectional area of ​​the compensation portion 4 located on the pressure side 1-3-1 with the support surface.

[0064] The sealing gasket 2 is in direct contact with the heat exchange fluid at the position without a supporting surface on the pressure side 1-3-1, and will be directly affected by the pressure of the heat exchange fluid and have a tendency to slide toward the non-pressure side 1-3-2. However, at the position with a supporting surface on the pressure side 1-3-1, the tendency to slide toward the non-pressure side 1-3-2 is relatively weak because the supporting surface constraint can offset part of the pressure of the heat exchange fluid.

[0065] The third area is set to be larger than the fourth area, that is, S3>S4, which increases the area of ​​S3, so that the cross-sectional area of ​​the compensation portion 4 located on the pressure side 1-3-1 without a support surface is larger. The larger the cross-sectional area, the greater the compression force on the sealing gasket 2 at this position, thereby increasing the contact friction and normal contact pressure at this position, and reducing the sliding deformation tendency of the sealing gasket 2 at this position.

[0066] Correspondingly, the cross-sectional area of ​​the compensation portion 4 located at the support surface on the pressure side 1-3-1 is smaller. Due to the constraint of the support surface, this position does not require a large internal stress. Excessive internal stress will accelerate the aging rate of the sealing gasket 2 and reduce its service life. By reducing the area of ​​S4, the compressive force on the sealing gasket 2 at this position is reduced, the compressive stress at this position is reduced, and the service life of the sealing gasket 2 is increased.

[0067] Viewed along the extension direction of the sealing gasket 2, the second cross-sectional area A2 of the compensation portion 4 located on the pressure side 1-3-1 increases and decreases alternately, making the overall force on the sealing gasket 2 more uniform, which can reduce the clamping force when assembling the sealing gasket 2 and the heat exchange plate 1, and facilitates disassembly and maintenance.

[0068] In some embodiments, the third area is equal to the fourth area.

[0069] Because the pressure side 1-3-1 will be subjected to the pressure of the heat exchange fluid regardless of whether there is a support surface or not, the influence of the presence or absence of the support surface is weakened. Therefore, when designing the compensation part 4 of the pressure side 1-3-1, it is not necessary to set a differentiated cross-sectional area; and for different heat exchange plates 1, and different areas of the same heat exchange plate 1, the distribution density of the second valley 1-7 and the second ridge 1-6 is usually different. By designing the compensation part 4 with equal A2, the versatility of the sealing gasket 2 can be improved.

[0070] In some embodiments, as Figures 3 to 7 As shown, the first area is larger than the third area, and the second area is larger than the fourth area.

[0071] like Figure 7 As shown, the first area is larger than the third area, that is, S1>S3, which can enhance the compression force on the non-pressure side 1-3-2 sealing gasket 2, thereby increasing the contact friction at this position, balancing the pressure difference on both sides of the sealing gasket 2, and reducing the tendency of the sealing gasket 2 to slide toward the non-pressure side 1-3-2.

[0072] like Figure 6 As shown, the second area is greater than the fourth area, that is, S2>S4, which can enhance the compression force on the non-pressure side 1-3-2 sealing gasket 2, thereby increasing the contact friction and normal contact pressure at this position, balancing the pressure difference on both sides of the sealing gasket 2, and reducing the tendency of the sealing gasket 2 to slide toward the non-pressure side 1-3-2.

[0073] This embodiment is equivalent to making A1>A2 of the compensation part 4 as a whole, so as to balance the pressure difference on both sides of the sealing gasket 2 and reduce the tendency of the sealing gasket 2 to slide toward the non-pressure side 1-3-2; and the overall cross-sectional area of ​​the compensation part 4 on the pressure side 1-3-1 is reduced, which can reduce the compressive force on the sealing gasket 2 at this position, reduce the compressive stress at this position, and improve the service life of the sealing gasket 2. At the same time, it can reduce the clamping force when the sealing gasket 2 and the heat exchange plate 1 are assembled, which is convenient for disassembly and maintenance.

[0074] In some embodiments, the third area is equal to the first area, and the fourth area is equal to the second area, which is equivalent to making A2 = A1 of the compensation part 4 as a whole, so that the pressure side 1-3-1 and the non-pressure side 1-3-2 are consistent. On the basis of meeting the anti-slip cross-sectional area, it can be convenient for design and processing.

[0075] In some embodiments, the first area is 1.2-1.8 times the second area, the third area is 1-1.5 times the fourth area, the first area is 1-1.5 times the third area, and the second area is 1-1.5 times the fourth area.

[0076] S1: S2 = 1.2-1.8, to avoid a large difference between the first area and the second area, which would cause uneven force on the sealing gasket 2 along the extension direction, causing the sealing groove 1-3 to deform and cause leakage; it also avoids a small difference between the first area and the second area, which would fail to balance the constraint difference of whether the non-pressure side 1-3-2 of the sealing gasket 2 has a support surface.

[0077] S3: S4 = 1-1.5, to avoid a large difference between the third area and the fourth area, which would cause uneven force on the sealing gasket 2 along the extension direction, causing the sealing groove 1-3 to deform and cause leakage; it also avoids a small difference between the third area and the fourth area, which would fail to balance the constraint difference of whether the pressure side 1-3-1 of the sealing gasket 2 has a support surface or not.

[0078] S1: S3 = 1-1.5, to avoid a large difference between the first area and the third area, which would cause uneven force on the sealing gasket 2 along the cross-sectional direction, causing the sealing groove 1-3 to deform and cause leakage; and to avoid a small difference between the first area and the third area, which would fail to balance the pressure difference on both sides of the sealing gasket 2.

[0079] S2: S4 = 1-1.5, to avoid a large difference between the second area and the fourth area, which would cause uneven force on the sealing gasket 2 along the cross-sectional direction, causing the sealing groove 1-3 to deform and cause leakage; and to avoid a small difference between the second area and the fourth area, which would fail to balance the pressure difference on both sides of the sealing gasket 2.

[0080] In some embodiments, the thickness of the sealing gasket 2 is greater than the depth of the sealing groove 1-3, ensuring that the heat exchange plate 1 can clamp the sealing gasket 2. The sealing gasket 2 has a certain amount of compression. After the heat exchange plate 1 is compressed, the rebound force of the sealing gasket 2 can effectively ensure the seal; the cross-sectional area of ​​the sealing gasket 2 is greater than the cross-sectional area of ​​the sealing groove 1-3, ensuring that the sealing gasket 2 can fill the sealing groove 1-3 after compression to prevent fluid leakage.

[0081] In some embodiments, the thickness of the sealing gasket 2 is 1.2-1.8 times the depth of the sealing groove 1-3, the cross-sectional area of ​​the sealing gasket 2 is 1.1-1.4 times the cross-sectional area of ​​the sealing groove 1-3, and the ratio of the cross-sectional area of ​​the compensation part 4 to the cross-sectional area of ​​the base part 3 is 0.1-0.4.

[0082] The total thickness of the base portion 3 and the compensation portion 4 is the thickness of the sealing gasket 2. The thickness of the sealing gasket 2 is 1.2-1.8 times the depth of the sealing groove 1-3. This avoids the sealing gasket 2 being too thick, which will cause large internal stress after compression and reduce its service life; it also avoids the sealing gasket 2 being too thin, which will cause insufficient rebound force after compression and cannot ensure the sealing effect.

[0083] The total cross-sectional area of ​​the base portion 3 and the compensation portion 4 is the cross-sectional area of ​​the sealing gasket 2. The cross-sectional area of ​​the sealing gasket 2 is 1.1-1.4 times the cross-sectional area of ​​the sealing groove 1-3. This avoids the sealing gasket 2 having a large cross-sectional area, which causes large internal stress after compression and reduces the service life; and also avoids the sealing gasket 2 having a small cross-sectional area, which fails to fill the sealing groove 1-3 after compression and causes leakage.

[0084] The ratio of the cross-sectional area of ​​the compensation portion 4 to the cross-sectional area of ​​the base portion 3 is 0.1-0.4, to avoid the cross-sectional area of ​​the compensation portion 4 being too large, the contact area between the compensation portion 4 and the upper heat exchange plate 1 being too large, the pressure-bearing capacity of the sealing gasket 2 being unable to be ensured, and over-compression failure; and to avoid the cross-sectional area of ​​the compensation portion 4 being too small, the stress in the sealing gasket 2 being too large, the stress concentration, and the deformation of the sealing groove 1-3.

[0085] In some embodiments, the cross section of the compensation portion 4 is trapezoidal, rectangular or arched, and is not specifically limited thereto. Figure 3 As shown, the cross section of the compensation portion 4 is an isosceles trapezoid, which has better pressure-bearing capacity, can apply force evenly to the base portion 3, and has a good sealing effect.

[0086] In some embodiments, as Figures 3 to 15 As shown, the thickness of the compensation portion 4 is equal, the width of the compensation portion 4 located between the cross-sectional center line of the base portion 3 and the non-compressed side 1-3-2 is the non-compressed width, the non-compressed width of the compensation portion 4 close to the first valley 1-5 is the first width, and the non-compressed width of the compensation portion 4 close to the first ridge 1-4 is the second width, and the first width is greater than the second width.

[0087] The thickness of the compensation portion 4 along the cross-sectional direction and the extension direction of the sealing gasket 2 is equal, and the cross-sectional area of ​​the compensation portion 4 depends on the width of the compensation portion 4 .

[0088] Viewed along the extension direction of the sealing gasket 2, the width of the compensation portion 4 increases and decreases alternately, so that the overall force on the sealing gasket 2 is more uniform, which can reduce the clamping force when the sealing gasket 2 and the heat exchange plate 1 are assembled, and is convenient for disassembly and maintenance. There is a transition zone for the position where the width of the compensation portion 4 changes, which avoids sudden changes in width and uneven compressive stress.

[0089] like Figure 3 As shown, the width of the compensation portion 4 located between the cross-sectional center line of the base portion 3 and the non-compression side 1-3-2 is the non-compression width. The non-compression width is L1 in the figure, which represents the width of the compensation portion 4 located on the non-compression side 1-3-2.

[0090] like Figure 7 As shown, the non-compressed width of the compensation portion 4 near the first valley 1-5 is the first width, which is D1 in the figure, representing the width of the compensation portion 4 located on the non-compressed side 1-3-2 without a support surface. Figure 6 As shown, the non-compressed width of the compensation portion 4 close to the first ridge 1-4 is the second width, which is D2 in the figure, representing the width of the compensation portion 4 located on the non-compressed side 1-3-2 with the support surface.

[0091] The first width is greater than the second width, that is, D1>D2, which has the same effect as the aforementioned S1>S2 and can solve the problem of slippage and leakage of the sealing gasket 2. In addition, the uniform thickness of the compensation part 4 makes the top of the compensation part 4 flat, avoiding stress concentration during extrusion assembly with the upper heat exchange plate 1, which causes deformation of the sealing groove 1-3; under the condition that the thickness of the compensation part 4 is uniform, the corresponding cross-sectional area can be changed by changing the width of the compensation part 4, which is more convenient for design and manufacturing.

[0092] In some embodiments, as Figure 3 As shown, the width of the compensation portion 4 located between the cross-sectional center line of the base portion 3 and the pressure side 1-3-1 is the pressure width. The pressure width is L2 in the figure, which represents the width of the compensation portion 4 located on the pressure side 1-3-1.

[0093] like Figure 7 As shown, the compensating portion 4 near the second valley 1-7 has a third width under compression, which is D3 in the figure, representing the width of the compensating portion 4 located on the non-supporting compressive side 1-3-1. Figure 6 As shown, the compressed width of the compensation portion 4 close to the second ridge 1-6 is the fourth width, which is D4 in the figure, representing the width of the compensation portion 4 located on the compressed side 1-3-1 with the support surface.

[0094] Accordingly, corresponding to the aforementioned area difference, D3≥D4, D1≥D3, D2≥D4, and the effect is the same as the effect of the area difference of the aforementioned compensation part 4, which will not be elaborated here.

[0095] In some embodiments, as Figure 10 and Figure 14 As shown in the figure, Z is the cross-sectional center line of the base portion 3, and the compensation portion 4 is a protrusion, wherein D1>D2, so that the compressive force on the compensation portion 4 without a support surface on the non-pressure side 1-3-2 increases, thereby increasing the contact friction and normal contact pressure at this position, and reducing the sliding deformation of the sealing gasket 2 at this position; D3>D4, so that the compressive force on the compensation portion 4 without a support surface on the pressure side 1-3-1 increases, thereby increasing the contact friction and normal contact pressure at this position, and reducing the sliding deformation tendency of the sealing gasket 2 at this position; D1>D3, can enhance the compressive force on the sealing gasket 2 on the non-pressure side 1-3-2, thereby increasing the contact friction and normal contact pressure at this position, and balancing the pressure difference on both sides of the sealing gasket 2; D2=D4, which is convenient for design and production.

[0096] In some embodiments, as Figure 11 and Figure 15 As shown in the figure, Z is the cross-sectional center line of the base portion 3, and the compensation portion 4 is a protrusion, wherein D1>D2, so that the compressive force on the compensation portion 4 without a support surface on the non-pressure side 1-3-2 is increased, thereby increasing the contact friction and normal contact pressure at this position, and reducing the sliding deformation of the sealing gasket 2 at this position; D3=D4=D2, which is convenient for design and production.

[0097] In some embodiments, as Figures 3 to 9 As shown, the compensation portion 4 includes two protrusions 4-1, which are respectively located on both sides of the cross-sectional center line of the base portion 3, and the width of the protrusion 4-1 located between the cross-sectional center line of the base portion 3 and the non-compressed side 1-3-2 is the non-compressed width.

[0098] like Figures 4 to 7As shown, the compensation part 4 includes two protrusions 4-1, which are respectively located on both sides of the cross-sectional center line of the base part 3. The two protrusions 4-1 can evenly distribute the force on the sealing groove 1-3, thereby preventing the sealing groove 1-3 from being deformed due to excessive local force, thereby affecting the sealing effect. When the compensation part 4 is compressed, the contact area with the upper heat exchange plate 1 is reduced compared to a sealing structure with a protruding surface, and the force area is small, thereby increasing the pressure of the compensation part 4 and improving the local force of multiple areas of the sealing gasket 2. When the base part 3 is compressed, the contact area with the lower heat exchange plate 1 is increased, which reduces the pressure per unit area of ​​the base part 3, thereby enhancing the pressure bearing capacity of the base part 3, making it less likely to fail due to over-compression, and having a long service life. In addition, the contact area between the base part 3 and the lower heat exchange plate 1 is increased, thereby increasing the overall friction of the sealing gasket 2, thereby preventing the sealing gasket 2 from shifting and achieving a good sealing effect.

[0099] In some embodiments, as Figure 6 and Figure 7 As shown, D1>D2, which increases the compressive force on the compensation portion 4 without a support surface on the non-pressure side 1-3-2, thereby increasing the contact friction and normal contact pressure at this position, and reducing the sliding deformation of the sealing gasket 2 at this position; D3>D4, which increases the compressive force on the compensation portion 4 without a support surface on the pressure side 1-3-1, thereby increasing the contact friction and normal contact pressure at this position, and reducing the sliding deformation tendency of the sealing gasket 2 at this position; D1>D3, D2>D4, can enhance the compressive force on the sealing gasket 2 on the non-pressure side 1-3-2, thereby increasing the contact friction and normal contact pressure at this position, and balancing the pressure difference on both sides of the sealing gasket 2.

[0100] In some embodiments, as Figure 8 and Figure 12 As shown in the figure, Z is the cross-sectional center line of the base portion 3, and the compensation portion 4 is two raised portions 4-1, wherein D1>D2, so that the compressive force on the compensation portion 4 on the non-pressure side 1-3-2 without a support surface increases, thereby increasing the contact friction and normal contact pressure at this position, and reducing the sliding deformation of the sealing gasket 2 at this position; D3>D4, so that the compressive force on the compensation portion 4 on the pressure side 1-3-1 without a support surface increases, thereby increasing the contact friction and normal contact pressure at this position, and reducing the sliding deformation tendency of the sealing gasket 2 at this position; D1>D3, which can enhance the compressive force on the sealing gasket 2 on the non-pressure side 1-3-2, thereby increasing the contact friction and normal contact pressure at this position, and balancing the pressure difference on both sides of the sealing gasket 2; D2=D4, which is convenient for design and production.

[0101] In some embodiments, as Figure 9 and Figure 13As shown in the figure, Z is the cross-sectional center line of the base portion 3, and the compensation portion 4 is two raised portions 4-1, wherein D1>D2, so that the compressive force on the compensation portion 4 without a support surface on the non-pressure side 1-3-2 is increased, thereby increasing the contact friction and normal contact pressure at this position, and reducing the sliding deformation of the sealing gasket 2 at this position; D3=D4=D2, which is convenient for design and production.

[0102] In some embodiments, as Figure 12 and Figure 13 As shown in the figure, Z is the cross-sectional center line of the base portion 3, and a balancing portion 5 is further provided on the base portion 3. The balancing portion 5 is connected to the bottom of the two protrusions 4-1, and the thickness H1 of the balancing portion 5 is lower than the thickness H2 of the protrusion 4-1.

[0103] The balancing portion 5 is integrally formed with the raised portion 4-1 and the base portion 3. The balancing portion 5 connects the two raised portions 4-1 and is located at the center line of the cross section of the base portion 3. It can ensure the pressure of the heat exchange plate 1 on the middle part of the base, prevent the sealing groove 1-3 from being deformed in the middle due to excessive local force, evenly distribute the force on the sealing groove 1-3, and improve the service life of the heat exchange plate 1 and the sealing gasket 2.

[0104] In some embodiments, as Figure 1 As shown, the sealing gasket 2 is divided into a straight sealing section 2-1, a corner hole sealing section 2-2 and a two-line sealing section 2-3 according to the corresponding position of the sealing groove 1-3; the area ratio of the cross-sectional area of ​​the straight sealing section 2-1 to the cross-sectional area of ​​the sealing groove 1-3 at the corresponding position is a first area ratio, the area ratio of the cross-sectional area of ​​the corner hole sealing section 2-2 to the cross-sectional area of ​​the sealing groove 1-3 at the corresponding position is a second area ratio, and the area ratio of the cross-sectional area of ​​the two-line sealing section 2-3 to the cross-sectional area of ​​the sealing groove 1-3 at the corresponding position is a third area ratio, and the first area ratio is equal to the second area ratio and is less than the third area ratio; or, the thickness of the straight sealing section 2-1 is the same as the thickness of the corner hole sealing section 2-2, and the thickness of the two-line sealing section 2-3 is greater than the thickness of the straight sealing section 2-1.

[0105] like Figure 2 As shown, the four corners of the heat exchange plate 1 are provided with corner holes 1-1, a heat exchange area 1-2 is provided between the upper and lower corner holes 1-1, and sealing grooves 1-3 are provided around the heat exchange area 1-2 and the corner holes 1-1. Figure 1 As shown, the sealing gasket 2 can be divided into a straight sealing section 2-1, a corner hole sealing section 2-2 and a second sealing section 2-3. The second sealing section 2-3 is located between the corner hole sealing section 2-2 and the straight sealing section 2-1 and plays a role in guiding flow.

[0106] When assembling the heat exchanger, because alternating flow channels of hot and cold fluids are set, there are sealing gaskets 2 at the corresponding back positions of the heat exchange plate 1 where the straight sealing section 2-1 and the corner hole sealing section 2-2 are located, while there are no sealing gaskets 2 at the corresponding back positions of the heat exchange plate 1 where the second sealing section 2-3 is located, that is, it is in a suspended state. In order to compensate for the pressure bearing capacity here, the thickness of the second sealing section 2-3 can be designed to be greater than the thickness of the straight sealing section 2-1 or the corner hole sealing section 2-2, or the compression ratio of the second sealing section 2-3 can be designed to be greater than the compression ratio of the straight sealing section 2-1 or the corner hole sealing section 2-2, thereby increasing the compression force of the second sealing section 2-3 and improving the sealing effect.

[0107] Usually, the sealing groove 1-3 between the heat exchange area 1-2 and the corner hole 1-1 is narrow, that is, the cross-sectional area of ​​the sealing groove 1-3 corresponding to the second sealing section 2-3 is small, while the sealing groove 1-3 in other areas of the heat exchange area 1-2 and the corner hole 1-1 is wide, that is, the cross-sectional area of ​​the sealing groove 1-3 corresponding to the straight sealing section 2-1 and the corner hole sealing section 2-2 is large, which can reduce the deformation of the sealing groove 1-3 between the heat exchange area 1-2 and the corner hole 1-1.

[0108] The compression ratio can be calculated by the area ratio of the cross-sectional area of ​​the sealing gasket 2 to the cross-sectional area of ​​the sealing groove 1-3. The larger the area ratio, the greater the compression ratio. The area ratio of the cross-sectional area of ​​the straight sealing section 2-1 to the cross-sectional area of ​​the sealing groove 1-3 at the corresponding position is set as the first area ratio, the area ratio of the cross-sectional area of ​​the corner hole sealing section 2-2 to the cross-sectional area of ​​the sealing groove 1-3 at the corresponding position is set as the second area ratio, and the area ratio of the cross-sectional area of ​​the second sealing section 2-3 to the cross-sectional area of ​​the sealing groove 1-3 at the corresponding position is set as the third area ratio. The first area ratio is equal to the second area ratio and is less than the third area ratio, so that the compression ratio of the second sealing section 2-3 can be greater than the compression ratio of the straight sealing section 2-1 or the corner hole sealing section 2-2, thereby improving the sealing effect.

[0109] In some embodiments, the compensating portion 4 of the straight sealing section 2-1 and the corner hole sealing section 2-2 is two protrusions 4-1, while the compensating portion 4 of the second sealing section 2-3 is one protrusion, that is, the compensating portion 4 of the second sealing section 2-3 fills the gap between the two protrusions 4-1, so that the cross-sectional area of ​​the second sealing section 2-3 is larger than the cross-sectional area of ​​the straight sealing section 2-1 or the corner hole sealing section 2-2.

[0110] In some embodiments, the bottom width of the base portion 3 of the second sealing segment 2-3 is smaller than the bottom width of the base portion 3 of the straight sealing segment 2-1 or the corner hole sealing segment 2-2, and the thickness of the compensation portion 4 of the second sealing segment 2-3 is greater than the thickness of the compensation portion 4 of the straight sealing segment 2-1 or the corner hole sealing segment 2-2. Under the condition of ensuring the compression ratio, the thickness of the second sealing segment 2-3 is greater than the thickness of the straight sealing segment 2-1 or the corner hole sealing segment 2-2 to ensure the sealing effect.

[0111] Some embodiments of the present application provide a heat exchanger comprising a plurality of stacked heat exchange plates 1 , wherein a sealing gasket 2 for the heat exchange plates 1 as described in any of the above embodiments is provided between two adjacent heat exchange plates 1 .

[0112] The heat exchanger includes stacked heat exchange plates 1. By using the sealing gasket 2 for heat exchange plates 1 as described in any of the above embodiments between two adjacent heat exchange plates 1, the sealing effect between the heat exchange plates 1 can be improved, thereby increasing the service life of the heat exchanger.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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 sealing gasket for a heat exchange plate, characterized in that: The heat exchange plate is provided with a sealing groove, one side of the sealing groove is a pressure side in contact with the heat exchange fluid, and the other side is a non-pressure side that does not contact the heat exchange fluid. First ridges and first valleys are alternately arranged on the heat exchange plate outside the non-pressure side. The sealing gasket is a one-piece structure corresponding to the sealing groove and is used to be installed in the sealing groove to seal the sealing groove. The sealing gasket includes: The base part is a one-piece structure and cooperates with the sealing groove; The compensation part is a one-piece structure and is provided on the base part; Among them, the cross-sectional area of ​​the compensation portion located between the cross-sectional center line of the base portion and the non-pressure side is a first cross-sectional area, the first cross-sectional area of ​​the compensation portion close to the first valley is a first area, and the first cross-sectional area of ​​the compensation portion close to the first ridge is a second area, and the first area is greater than the second area.

2. The sealing gasket for heat exchange plate according to claim 1, characterized in that: Second ridges and second valleys are alternately arranged on the heat exchange plate outside the pressure side, the cross-sectional area of ​​the compensation portion between the cross-sectional centerline of the base portion and the pressure side is the second cross-sectional area, the second cross-sectional area of ​​the compensation portion close to the second valley is the third area, and the second cross-sectional area of ​​the compensation portion close to the second ridge is the fourth area, and the third area is greater than or equal to the fourth area.

3. The sealing gasket for heat exchange plate according to claim 2, characterized in that: The first area is greater than or equal to the third area, and the second area is greater than or equal to the fourth area.

4. The sealing gasket for heat exchange plate according to claim 2, characterized in that: The first area is 1.2-1.8 times the second area, the third area is 1-1.5 times the fourth area, the first area is 1-1.5 times the third area, and the second area is 1-1.5 times the fourth area.

5. The sealing gasket for heat exchange plate according to claim 1, characterized in that: The thickness of the sealing gasket is 1.2-1.8 times the depth of the sealing groove, the cross-sectional area of ​​the sealing gasket is 1.1-1.4 times the cross-sectional area of ​​the sealing groove, and the ratio of the cross-sectional area of ​​the compensation portion to the cross-sectional area of ​​the base portion is 0.1-0.

4.

6. The sealing gasket for heat exchange plate according to claim 1, characterized in that: The thickness of the compensation portion is equal, the width of the compensation portion located between the cross-sectional center line of the base portion and the non-compressed side is the non-compressed width, the non-compressed width of the compensation portion close to the first valley is the first width, and the non-compressed width of the compensation portion close to the first ridge is the second width, and the first width is greater than the second width.

7. The sealing gasket for heat exchange plate according to claim 6, characterized in that: The compensation portion includes two protrusions, which are respectively located on both sides of the cross-sectional centerline of the base portion. The width of the protrusion located between the cross-sectional centerline of the base portion and the non-pressurized side is the non-pressurized width.

8. The sealing gasket for heat exchange plate according to claim 7, characterized in that: A balancing portion is further provided on the base portion, and the balancing portion is connected to the bottoms of the two protruding portions. The thickness of the balancing portion is lower than that of the protruding portions.

9. The sealing gasket for heat exchange plate according to claim 1, characterized in that: The sealing gasket is divided into a straight sealing section, a corner hole sealing section and a two-stage sealing section according to the corresponding position of the sealing groove; The area ratio of the cross-sectional area of ​​the straight sealing section to the cross-sectional area of ​​the sealing groove at the corresponding position is a first area ratio, the area ratio of the cross-sectional area of ​​the corner hole sealing section to the cross-sectional area of ​​the sealing groove at the corresponding position is a second area ratio, and the area ratio of the cross-sectional area of ​​the two-sealing section to the cross-sectional area of ​​the sealing groove at the corresponding position is a third area ratio, and the first area ratio is equal to the second area ratio and smaller than the third area ratio; Alternatively, the thickness of the straight sealing section is the same as the thickness of the corner hole sealing section, and the thickness of the second sealing section is greater than the thickness of the straight sealing section.

10. A heat exchanger, characterized in that: The invention comprises a plurality of stacked heat exchange plates, wherein a sealing gasket for the heat exchange plate according to any one of claims 1 to 9 is provided between two adjacent heat exchange plates.

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