Heat exchange plates and heat exchangers

Abstract

The present application provides a heat exchange plate and a heat exchanger, the heat exchange plate comprising: a plate body, a sealing area and a heat exchange area being provided on the plate body, a sealing groove being provided in the sealing area, the sealing groove being used to install a sealing gasket, the heat exchange area being located on the inner side of the sealing area, a heat exchange channel being provided in the heat exchange area, the depth of the sealing groove being less than the depth of the heat exchange channel and greater than half the depth of the heat exchange channel. One side of the sealing groove is a pressure side that contacts 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 plate body outside the non-pressure side, and the bottom surface of the sealing groove extends toward the first valley to form a first platform. The heat exchange plate and heat exchanger provided by the present application have a simple structure and are easy to process. While improving the deformation resistance of the sealing groove, they can ensure the positioning accuracy and fixation reliability of the sealing gasket, 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 heat exchange plate and a heat exchanger. Background Art

[0002] A plate heat exchanger is composed of multiple stacked heat exchange plates, which are sealed with gaskets between the heat exchange plates to form heat exchange 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. In addition to being related to the material and structural design of the gasket, the sealing effect of the plate heat exchanger is also closely related to factors such as the structure and material of the heat exchange plate.

[0003] 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. The existing sealing groove is usually a bottom sealing structure, such as Figure 1 As shown in the figure, the depth of the sealing groove is equal to the corrugation depth of the heat exchange flow channel. However, when the heat exchanger is clamped, the sealing gasket exerts a large extrusion force on the supporting edge of the sealing groove, which makes the bottom of the sealing groove easily bend and deform upward, affecting the disassembly and assembly accuracy and sealing ability, resulting in a decrease in the friction force and normal contact pressure of the sealing gasket, causing the sealing gasket to slip and a leakage accident.

[0004] In order to improve the problem of sealing groove bending and deformation, some sealing grooves adopt a mid-surface sealing structure, such as Figure 2 As shown, the depth of the sealing groove is equal to half the corrugation depth of the heat exchange flow channel, and the sealing groove is equivalent to having four side walls. In this way, when the heat exchanger is clamped, although the sealing gasket of this layer will squeeze the left and right upper side walls to cause the sealing groove to bend and deform upward, the sealing gasket of the lower layer will also squeeze the left and right lower side walls to resist the upward bending and deformation of the sealing groove, thereby ensuring the friction force and normal contact pressure of the sealing gasket, thereby improving the pressure bearing capacity of the product. However, the positioning of the sealing gasket in this type of sealing groove is inaccurate and the fixation is not firm. When assembling the heat exchanger, the sealing gasket and the sealing groove are generally fixed with glue, which will increase the manufacturing cost and reduce production efficiency. In addition, when disassembling and repairing the heat exchanger, it is necessary to add a sealing groove degumming process, which increases maintenance costs and is inconvenient for repair.

[0005] Therefore, there is an urgent need for a heat exchange plate that has a high sealing groove deformation resistance and can ensure the positioning accuracy and fixing reliability of the sealing gasket. Summary of the Invention

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

[0007] In a first aspect of the present application, a heat exchange plate is provided, comprising: a plate body, a sealing area and a heat exchange area being provided on the plate body, a sealing groove being provided in the sealing area, the sealing groove being used to install a sealing gasket, the heat exchange area being located on the inner side of the sealing area, a heat exchange channel being provided in the heat exchange area, the depth of the sealing groove being less than the depth of the heat exchange channel and greater than half the depth of the heat exchange channel.

[0008] Furthermore, the ratio of the depth of the sealing groove to the depth of the heat exchange channel is 0.6-0.8.

[0009] Furthermore, one side of the sealing groove is a pressure side that contacts 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 plate body outside the non-pressure side, and the bottom surface of the sealing groove extends toward the first valley to form a first platform.

[0010] Furthermore, the length of the first platform is 1 mm to 3 mm.

[0011] Furthermore, second ridges and second valleys are alternately arranged on the plate outside the pressure-bearing side, and a second platform is formed on the bottom surface of the sealing groove extending toward the second valley.

[0012] Furthermore, the length of the first platform is greater than or equal to the length of the second platform.

[0013] Furthermore, the sealing groove is divided into a single-sealing section sealing groove, a second-sealing section sealing groove and two non-sealing section sealing grooves, the depth of the single-sealing section sealing groove and the second-sealing section sealing groove are equal, and the depth of the two non-sealing section sealing grooves is less than or equal to the depth of the single-sealing section sealing groove or the second-sealing section sealing groove.

[0014] Furthermore, the difference between the depth of the sealing groove of the first sealing section or the sealing groove of the second sealing section and the depth of the sealing groove of the second non-sealing section is 0.2 mm to 0.6 mm.

[0015] A heat exchanger comprises a plurality of stacked heat exchange plates as described in the first aspect above, wherein a sealing gasket is provided between two adjacent heat exchange plates, and the sealing gasket is installed in the sealing groove.

[0016] Furthermore, the sealing areas of two adjacent heat exchange plates cooperate with each other, and the difference between the length of the first ridge top surface of each heat exchange plate and the length of the first valley bottom surface at the opposite position of the adjacent heat exchange plates is -1mm to 1mm.

[0017] The heat exchanger is then compressed and the heat exchanger is cooled and cooled, and the condensation is stopped ... The sealing groove is easy to bend and deform upward, but the sealing gasket on the lower layer will also squeeze the newly formed left and right lower side walls of the sealing groove to resist the upward bending of the sealing groove, which helps to reduce deformation and ensure the friction force and normal contact pressure of the sealing gasket, thereby improving the pressure-bearing capacity of the product; the depth of the sealing groove is set to be greater than half the depth of the heat exchange flow channel. Compared with the sealing groove designed as a mid-surface sealing structure, the depth of the sealing groove is increased, the height of the side wall is increased, and the contact area between the sealing groove and the lower end of the sealing gasket during assembly is increased, which is beneficial to the positioning and fixation of the sealing gasket in the sealing groove. The sealing gasket and the sealing groove no longer need to be fixed by glue, which reduces the high manufacturing cost and improves the production efficiency. The degumming process is avoided when disassembling and repairing the heat exchanger, which is convenient for maintenance; the heat exchange plate and the heat exchanger have a simple structure and are easy to process. While improving the deformation resistance of the sealing groove, the positioning accuracy and fixation reliability of the sealing gasket can be ensured, the sealing effect is good, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 It is a schematic diagram of the cross-sectional structure of a heat exchange plate and a sealing gasket in the related art;

[0020] Figure 2 It is a cross-sectional structural diagram of another type of heat exchange plate and sealing gasket in the related art;

[0021] Figure 3 This is a structural schematic diagram of a heat exchange plate in an embodiment of the present application;

[0022] Figure 4This is a schematic diagram of the cross-sectional structure of a sealing groove in an embodiment of the present application;

[0023] Figure 5 for Figure 3 Schematic diagram of the appearance structure at C in the middle;

[0024] Figure 6 for Figure 3 Schematic diagram of the structure viewed from above at point C in the middle;

[0025] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure of the sealing groove in the AA direction at the first ridge and the second ridge;

[0026] Figure 8 for Figure 6 Schematic diagram of the cross-sectional structure of the sealing groove in the BB direction at the first valley and the second valley;

[0027] Figure 9 for Figure 3 Schematic diagram of the cross-sectional structure of the sealing groove at D in the middle;

[0028] Figure 10 for Figure 3 Schematic diagram of the cross-sectional structure of the sealing groove at E in the middle;

[0029] Figure 11 For sealing gasket and Figure 7 A schematic diagram of the cross-sectional structure of the sealing groove after being extruded;

[0030] Figure 12 For sealing gasket and Figure 8 A schematic diagram of the cross-sectional structure of the sealing groove after being extruded;

[0031] Figure 13 For sealing gasket and Figure 8 A schematic diagram of the cross-sectional structure of the sealing groove in the seal when pressed after the seal groove is matched;

[0032] Figure 14 This is a schematic diagram of the cross-sectional structure of a heat exchanger at a sealing groove of a sealing section in an embodiment of the present application;

[0033] Figure 15 This is a schematic diagram of the cross-sectional structure of a heat exchanger at the second sealing section sealing groove or the second non-sealing section sealing groove in an embodiment of the present application.

[0034] Figure numerals: 1. Plate body; 1-1. Corner hole; 2. Sealing area; 3. Sealing groove; 3-1. Pressure side; 3-2. Non-pressure side; 3-3. First platform; 3-4. Second platform; 3-5. One sealing section sealing groove; 3-6. Two sealing section sealing grooves; 3-7. Two non-sealing section sealing grooves; 4. Sealing gasket; 5. Heat exchange area; 6. Heat exchange channel; 7. First ridge; 8. First valley; 9. Second ridge; 10. Second valley. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] A plate heat exchanger is composed of multiple stacked heat exchange plates, which are sealed with gaskets between the heat exchange plates to form heat exchange 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. In addition to being related to the material and structural design of the gasket, the sealing effect of the plate heat exchanger is also closely related to factors such as the structure and material of the heat exchange plate.

[0038] 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. The existing sealing groove is usually a bottom sealing structure, such as Figure 1As shown, the depth H2 of the sealing groove 3 is equal to the corrugation depth H1 of the heat exchange channel 6, that is, H2=H1. The depth of the sealing groove 3 is larger, and the height of the two side walls of the sealing groove 3 is also larger. This is conducive to positioning and fixing the sealing gasket 4 in the sealing groove 3 when assembling the heat exchanger. However, when clamping the heat exchanger, the sealing gasket 4 exerts a large extrusion force on the supporting edge of the sealing groove 3, which makes the bottom of the sealing groove 3 easily bend and deform upward, affecting the disassembly and assembly accuracy and sealing ability, especially in the second sealing area of ​​the plate body 1. After the heat exchanger is assembled, a sealing gasket 4 is provided on one side of the plate body 1 at this position, and no sealing gasket 4 is provided on the other side. The sealing groove 3 without the sealing gasket 4 is in a suspended state, and the bottom surface of the sealing groove 3 will be subjected to the upward extrusion force of the lower sealing gasket 4, and the sealing groove 3 is more likely to bend and deform upward, resulting in a decrease in the friction force and normal contact pressure of the sealing gasket 4, and the sealing gasket 4 slips, resulting in a leakage accident.

[0039] In order to improve the problem of bending and deformation of some sealing grooves 3, a mid-surface sealing structure is adopted, such as Figure 2 As shown, the depth H2 of the sealing groove 3 is equal to half of the corrugation depth H1 of the heat exchange channel 6, that is, H2 = 1 / 2H1. The sealing groove 3 is equivalent to having four side walls. In this way, when the heat exchanger is clamped, although the sealing gasket 4 of this layer will squeeze the left and right upper side walls to make the sealing groove 3 bend and deform upward, the sealing gasket 4 of the lower layer will also squeeze the left and right lower side walls to resist the upward bending and deformation of the sealing groove 3, especially in the second sealing area of ​​the plate body 1. After the heat exchanger is assembled, a sealing gasket 4 is provided on one side of the plate body 1 at this position, and no sealing gasket 4 is provided on the other side. The sealing groove 3 without sealing gasket 4 is in a suspended state. Although the bottom surface of the sealing groove 3 will be subjected to the upward squeezing force of the sealing gasket 4 of the lower layer, the sealing groove 3 is more likely to bend and deform upward, the sealing gasket 4 of the lower layer 4 will also squeeze the left and right lower side walls of the sealing groove 3, resisting the upward bending of the sealing groove 3, helping to reduce deformation, ensuring the friction force and normal contact pressure of the sealing gasket 4, and thus improving the pressure-bearing capacity of the product. However, due to the small depth of this type of sealing groove 3 and the small height of the side walls of the sealing groove 3, the sealing gasket 4 is not accurately positioned in the sealing groove 3 and is not firmly fixed. When assembling the heat exchanger, the sealing gasket 4 and the sealing groove 3 are generally fixed by gluing, which will increase manufacturing costs and reduce production efficiency. In addition, when disassembling and repairing the heat exchanger, it is necessary to add a glue removal process for the sealing groove 3, which increases maintenance costs and is inconvenient for repair. Therefore, there is an urgent need for a heat exchange plate with high anti-deformation ability of the sealing groove 3 and can ensure the positioning accuracy and fixation reliability of the sealing gasket 4.

[0040] Below, through specific embodiments and combined Figures 3 to 15 To describe the technical solution of this application in detail.

[0041] In some embodiments of the present application, a heat exchange plate is provided, such as Figure 3 and Figure 4As shown, it includes: a plate body 1, a sealing area 2 and a heat exchange area 5 are provided on the plate body 1, a sealing groove 3 is provided in the sealing area 2, and the sealing groove 3 is used to install a sealing gasket 4, the heat exchange area 5 is located on the inner side of the sealing area 2, and a heat exchange channel 6 is provided in the heat exchange area 5, and the depth of the sealing groove 3 is less than the depth of the heat exchange channel 6 and greater than half the depth of the heat exchange channel 6.

[0042] like Figure 3 As shown, the plate body 1 is provided with a sealing area 2 for sealing the plate body 1, a sealing groove 3 is provided for installing a sealing gasket 4, a heat exchange area 5 is provided for heat exchange, and a heat exchange channel 6 is provided for heat exchange between cold and hot fluids.

[0043] like Figure 4 As shown, H1 is the depth of the heat exchange channel 6, H2 is the depth of the sealing groove 3, and H3 is half the depth of the heat exchange channel 6, that is, 1 / 2H1. The depth of the sealing groove 3 is set to be smaller than the depth of the heat exchange channel 6, that is, H2 Figure 14 As shown, when the heat exchanger is clamped, although the sealing gasket 4 of the current layer will squeeze the two original upper side walls on the left and right, causing the sealing groove 3 to bend and deform upward, the sealing gasket 4 of the lower layer will also squeeze the two newly formed lower side walls on the left and right to resist the upward bending and deformation of the sealing groove 3, especially in the second sealing area 2 of the plate body 1, as shown in FIG. Figure 15 As shown, after the heat exchanger is assembled, a sealing gasket 4 is provided on one side of the plate body 1 at this position, and no sealing gasket 4 is provided on the other side. The sealing groove 3 without the sealing gasket 4 is in a suspended state. Although the bottom surface of the sealing groove 3 will be subjected to the upward extrusion force of the lower sealing gasket 4, and the sealing groove 3 is prone to bend and deform upward, the lower sealing gasket 4 will also squeeze the left and right newly formed lower side walls of the sealing groove 3 to resist the upward bending of the sealing groove 3, which helps to reduce deformation and ensure the friction force and normal contact pressure of the sealing gasket 4, thereby improving the pressure-bearing capacity of the product.

[0044] The depth of the sealing groove 3 is set to be greater than half the depth of the heat exchange channel 6, that is, H2>H3. Compared with the sealing groove 3 designed as a mid-surface sealing structure, the depth of the sealing groove 3 is increased, and the height of the side wall is increased, which also increases the contact area between the sealing groove 3 and the lower end of the sealing gasket 4 during assembly, which is beneficial to the positioning and fixation of the sealing gasket 4 in the sealing groove 3. The sealing gasket 4 and the sealing groove 3 no longer need to be fixed by glue, which reduces the high manufacturing cost and improves the production efficiency. When disassembling and repairing the heat exchanger, the glue removal process is avoided, which is convenient for maintenance.

[0045] The heat exchange plate has a simple structure and is easy to process. While improving the deformation resistance of the sealing groove 3, it can ensure the positioning accuracy and fixing reliability of the sealing gasket 4, thereby achieving good sealing effect and long service life. ​

[0046] In some embodiments, the depth of the heat exchange channel 6 is greater than or equal to 2.5 mm.

[0047] The sealing groove 3 is designed as a sub-bottom sealing structure. For heat exchange plates with a heat exchange channel 6 having a depth of less than 2.5 mm, the depth is too low to make rounded corners, and the sub-bottom sealing structure is not easy to make, which will also weaken the ability of the sealing groove 3 to resist deformation.

[0048] In some embodiments, the ratio of the depth of the sealing groove 3 to the depth of the heat exchange channel 6 is 0.6-0.8.

[0049] The ratio of the depth of the sealing groove 3 to the depth of the heat exchange channel 6 is 0.6-0.8, that is, H2 = (0.6~0.8)H1, which is beneficial to improving the anti-deformation ability of the sealing groove 3 and improving the sealing effect of the product, and can ensure the positioning accuracy and fixation reliability of the assembly of the sealing gasket 4 and the plate body 1 without bonding. When H2>0.8H1, the sealing groove 3 is closer to the bottom surface sealing structure and has poor anti-deformation ability; when H2<0.6H1, the sealing groove 3 is closer to the mid-surface sealing structure and has poor positioning and fixing ability for the sealing gasket 4.

[0050] In some embodiments, as Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, one side of the sealing groove 3 is a pressure side 3-1 that contacts the heat exchange fluid, and the other side is a non-pressure side 3-2 that does not contact the heat exchange fluid. First ridges 7 and first valleys 8 are alternately arranged on the plate body 1 outside the non-pressure side 3-2, and the bottom surface of the sealing groove 3 extends toward the first valley 8 to form a first platform 3-3.

[0051] like Figure 3 As shown, the two sides of the sealing groove 3 are usually subjected to different pressures. The sealing groove 3 can be divided into a first sealing section sealing groove 3-5 and a second sealing section sealing groove 3-6 according to its position on the heat exchange plate. The first sealing section sealing groove 3-5 is further divided into a straight sealing area sealing groove and a corner hole sealing area sealing groove.

[0052] like Figure 3 As shown in area C in the middle, it is a straight sealing area sealing groove. One side is the heat exchange area 5. Because it contacts the heat exchange fluid, it will bear the pressure of the fluid, so this side is the pressure side 3-1; and the other side is the sealing area 2. Because it does not contact the heat exchange fluid and does not bear the pressure of the fluid, this side is the non-pressure side 3-2.

[0053] like Figure 3As shown in the middle F area, it is the sealing groove of the corner hole sealing area. One side is the corner hole 1-1. The corner hole 1-1 is the inlet and outlet of the heat exchange fluid. Because it contacts the heat exchange fluid, it will bear the pressure of the fluid, so this side is the pressure side 3-1; and the other side is the sealing area 2. Because it does not contact the heat exchange fluid and does not bear the pressure of the fluid, this side is the non-pressure side 3-2.

[0054] like Figure 3 As shown in the middle D area, there are two sealing section sealing grooves 3-6, which include two sealing grooves 3. Among them, for a sealing groove 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 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 3-2; for a sealing groove 3 close to the heat exchange area 5, one side is the heat exchange area 5. Because it contacts the heat exchange fluid, it will bear the pressure of the fluid, so this side is the pressure side 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 3-2.

[0055] like Figure 5 As shown, the side walls of the sealing groove 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 3 at the ridges have support surfaces, which can restrain the sealing gasket 4. When the sealing gasket 4 is compressed, it can prevent the sealing gasket 4 from deforming and increase the contact friction. The side walls of the sealing groove 3 at the valleys have no support surfaces and cannot restrain the sealing gasket 4. In addition, the two sides of the sealing groove 3 are under different pressures. The sealing gasket 4 on the non-pressure side 3-2 without a support surface has low contact friction and no constraint, so it is particularly easy to slip.

[0056] like Figure 5 and Figure 6 As shown in FIG. 1 , it is a schematic structural diagram of area C. In the figure, the left side is the sealing area 2 and the right side is the heat exchange area 5. Then the valley and ridge of the sealing area 2 are the corresponding first valleys 8 and first ridges 7. Figure 7 The cross-sectional structure diagram of the sealing groove 3 at the first ridge 7 is shown as follows. Figure 8 The figure shows a schematic cross-sectional structure diagram of the sealing groove 3 at the first valley 8 , wherein the bottom surface of the sealing groove 3 extends toward the first valley 8 to form a first platform 3 - 3 .

[0057] like Figure 11 As shown, the sealing gasket 4 at the first ridge 7 is squeezed after being matched with the sealing groove 3. Because of the support of the side wall, the sealing gasket 4 can fill the entire sealing groove 3, as shown in FIG. Figure 12 As shown, after the sealing gasket 4 in the first ridge 7 valley is squeezed into the sealing groove 3, the sealing gasket 4 will extend beyond the sealing groove 3 because there is no support from the side wall.

[0058] When the first platform 3-3 is not set, the sealing gasket 4 will slip near the first valley 8 due to the pressure of the heat exchange fluid. The sealing gasket 4 that slides out of the bottom surface of the sealing groove 3 will be deformed due to the lack of plane support, causing the sealing gasket 4 to generate a large vertical shear force at this position, reducing the service life of the sealing gasket 4. In addition, the normal contact pressure of the sealing gasket 4 after sliding is reduced due to the lack of support, which greatly reduces the sealing effect.

[0059] After the first platform 3-3 is set, when the sealing gasket 4 slides near the first valley 8, the sliding sealing gasket 4 Figure 13 As shown, the bottom is still supported by a plane, which ensures the normal contact pressure, prevents the sealing force from decreasing, reduces the vertical shearing effect of the sealing gasket 4, and increases the service life of the sealing gasket 4.

[0060] like Figure 14 and Figure 15 As shown, the top of the sealing gasket 4 is usually a ridge-type structure, and there is a certain distance between the top of the sealing gasket 4 and the edge of the sealing groove 3 of the upper heat exchange plate. Therefore, the top of the sealing gasket 4 is not easy to slide out of the sealing groove 3 to cause excessive shear deformation.

[0061] In some embodiments, the length of the first platform 3 - 3 is 1 mm to 3 mm.

[0062] When the inclination angle of the two original upper side walls of the sealing groove 3 is kept consistent with the inclination angle of the two newly formed lower side walls, that is, when the manufacturing process maintains the same draft angle, the first platform 3-3 can be naturally formed; by changing the inclination angle of the newly formed side wall, the length of the first platform 3-3 can be changed. The larger the slope of the inclination angle, the longer the length of the first platform 3-3.

[0063] like Figure 6 and Figure 8 As shown, D1 is the length of the first platform 3-3, 1mm≤D1≤3mm, which is equivalent to the sliding distance of the sealing gasket 4. When D1 is less than 1mm, that is, the first platform 3-3 is too short, then the supporting effect on the sealing gasket 4 sliding out of the sealing groove 3 is very small; when D1 is greater than 3mm, that is, the first platform 3-3 is too long, then the top surface length D3 of the first ridge 7 and the bottom surface length D4 of the first valley 8 will differ greatly, resulting in the first valley 8 and the first ridge 7 of the two heat exchange plates not being able to cooperate well, resulting in the phenomenon of heat exchange plate collapse.

[0064] In some embodiments, as Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, second ridges 9 and second valleys 10 are alternately arranged on the plate body 1 outside the pressure side 3 - 1 , and the bottom surface of the sealing groove 3 extends toward the second valley 10 to form a second platform 3 - 4 .

[0065] like Figure 5 and Figure 6 As shown, it is a schematic structural diagram of zone C. In the figure, the left side is the sealing zone 2, and the right side is the heat exchange zone 5. The valleys and ridges of the heat exchange zone 5 are the corresponding second valleys 10 and second ridges 9. The second valleys 10 and second ridges 9 of the heat exchange zone 5 constitute the heat exchange flow channel 6.

[0066] The sealing gasket 4 is in direct contact with the heat exchange fluid at the position on the pressure side 3-1 where there is no supporting surface, and will be directly affected by the pressure of the heat exchange fluid and have a tendency to slide toward the non-pressure side 3-2. However, at the position on the pressure side 3-1 where there is a supporting surface, the tendency to slide toward the non-pressure side 3-2 is relatively weak because the supporting surface constraint can offset part of the pressure of the heat exchange fluid.

[0067] The bottom surface of the sealing groove 3 extends toward the second valley 10 to form a second platform 3-4. After the second platform 3-4 is provided, the contact friction and normal contact pressure of the sealing gasket 4 at this position can be increased, and the sliding deformation tendency of the sealing gasket 4 at this position can be reduced.

[0068] In some embodiments, the length of the first platform 3 - 3 is greater than or equal to the length of the second platform 3 - 4 .

[0069] When the inclination angle of the two original upper side walls of the sealing groove 3 is kept consistent with the inclination angle of the two newly formed lower side walls, that is, when the manufacturing process maintains the same draft angle, the second platform 3-4 can also be formed naturally. By changing the inclination angle of the newly formed side wall, the length of the second platform 3-4 can also be changed. The larger the slope of the inclination angle, the longer the length of the second platform 3-4.

[0070] like Figure 6 and Figure 8 As shown, D2 is the length of the second platform 3-4, 1mm≤D2≤3mm, which ensures the support for the sealing gasket 4 and reduces the tendency of sliding deformation.

[0071] The length of the first platform 3-3 is greater than or equal to the length of the second platform 3-4, that is, D1≥D2, for example, D1=(1~1.5)D2, and there is no specific limitation. Because the sliding of the sealing gasket 4 is mainly toward the non-pressure side 3-2, the first platform 3-3 has a greater effect on the sealing gasket 4 than the second platform 3-4, so the length of the first platform 3-3 is designed to be greater than the length of the second platform 3-4, or the length of the first platform 3-3 can be designed to be equal to the length of the second platform 3-4, which is convenient for design and production.

[0072] In some embodiments, as Figure 3 、 Figure 9 、 Figure 10 and Figure 15As shown, the sealing groove 3 is divided into a single sealing section sealing groove 3-5, a second sealing section sealing groove 3-6 and two non-sealing section sealing grooves 3-7. The depths of the single sealing section sealing groove 3-5 and the second sealing section sealing groove 3-6 are equal, and the depths of the two non-sealing section sealing grooves 3-7 are less than or equal to the depths of the single sealing section sealing groove 3-5 or the second sealing section sealing groove 3-6.

[0073] like Figure 3 As shown, corner holes 1-1 are provided at the four corners of the heat exchange plate, and a heat exchange area 5 is provided between the upper and lower corner holes 1-1. Sealing grooves 3 are provided on the periphery of the heat exchange area 5 and the corner hole 1-1. The sealing grooves 3 can be divided into a single sealing section sealing groove 3-5, a second sealing section sealing groove 3-6 and two non-sealing section sealing grooves 3-7 according to their positions on the heat exchange plate. The single sealing section sealing groove 3-5 is further divided into a straight sealing area sealing groove and a corner hole sealing area sealing groove. The straight sealing area sealing groove is located on the outside of the heat exchange area 5, and the corner hole sealing area sealing groove is located on the outside of the corner hole 1-1; the second sealing section sealing groove 3-6 is located between the corner hole 1-1 and the heat exchange area 5, limiting the connection between the corner hole 1-1 and the heat exchange area 5; the second non-sealing section sealing groove 3-7 is also located between the corner hole 1-1 and the heat exchange area 5, and is arranged opposite to the second sealing section sealing groove 3-6. The two non-sealing section sealing grooves 3-7 are used to connect the corner hole 1-1 with the heat exchange area 5.

[0074] like Figure 7 As shown, H2-1 is the depth of the sealing groove 3-5 of a sealing section. Figure 9 As shown, H2-2 is the depth of the sealing groove 3-6 of the second sealing section. The depths of the sealing groove 3-5 of the first sealing section and the sealing groove 3-6 of the second sealing section are equal, that is, H2-1=H2-2, which is convenient for design and production.

[0075] like Figure 3 As shown in the middle E area, there are two non-sealed sealing grooves 3-7. Figure 10 As shown, H2-3 is the depth of the second non-sealed section sealing groove 3-7.

[0076] When assembling the heat exchanger, because of the alternating heat exchange flow channel 6 for hot and cold fluids, the back side of the heat exchange plate where the first sealing section sealing groove 3-5 is located has a sealing gasket 4, while the back side of the heat exchange plate where the second sealing section sealing groove 3-6 is located has no sealing gasket 4, that is, the second non-sealed section sealing groove 3-7 corresponding to the other heat exchange plate is in a suspended state, and the bottom surface of the sealing groove 3 will be subject to the upward extrusion force of the lower sealing gasket 4, and the sealing groove 3 is easy to bend and deform upward. By setting the depth of the second non-sealed section sealing groove 3-7 to be smaller than the depth of the first sealing section sealing groove 3-5 or the second sealing section sealing groove 3-6, that is, H2-3<H2-2=H2-1, it is equivalent to raising the depth of one heat exchange plate. The distance between the bottom surface of the second sealing section sealing groove 3-6 and the bottom surface of the second non-sealing section sealing groove 3-7 of the other heat exchange plate reduces the extrusion force of the sealing gasket 4 on the bottom surface of the second non-sealing section sealing groove 3-7, further reduces the bending deformation, and thus improves the pressure bearing capacity of the product; the depth of the second non-sealing section sealing groove 3-7 can also be set to be equal to the depth of the first sealing section sealing groove 3-5 or the second sealing section sealing groove 3-6, that is, H2-3=H2-2=H2-1, because the sealing gasket 4 in the lower layer of the second non-sealing section sealing groove 3-7 will also squeeze the left and right lower side walls of the sealing groove to resist the upward bending of the sealing groove, which helps to reduce deformation and ensure the friction force and normal contact pressure of the sealing gasket 4, thereby improving the pressure bearing capacity of the product.

[0077] The sealing effect of the sealing groove 3 is mainly achieved by controlling the compression ratio between the sealing gasket 4 and the sealing groove 3 .

[0078] In some embodiments, the difference between the depth of the first sealing section sealing groove 3-5 or the second sealing section sealing groove 3-6 and the depth of the second non-sealing section sealing groove 3-7 is 0.2 mm to 0.6 mm.

[0079] The difference between the depth of the sealing groove 3-5 of the first sealing section or the sealing groove 3-6 of the second sealing section and the depth of the sealing groove 3-7 of the second non-sealing section is 0.2mm to 0.6mm, which can avoid the difference being too large, reducing the flow channel depth and affecting the flow of the heat exchange fluid; it can also avoid the difference being too small, which can limit the ability of the sealing groove to resist deformation.

[0080] Some embodiments of the present application provide a heat exchanger comprising a plurality of stacked heat exchange plates as described in any of the above embodiments, wherein a sealing gasket 4 is provided between two adjacent heat exchange plates, and the sealing gasket 4 is installed in the sealing groove 3 .

[0081] The heat exchanger, for example, includes a first heat exchange plate and a second heat exchange plate stacked alternately, wherein the first heat exchange plate is the heat exchange plate as described in any of the above embodiments, 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. The cross-sectional view of the heat exchanger at the second sealing section sealing groove 3-6 or the second non-sealing section sealing groove 3-7 is as shown in FIG. Figure 15 As shown, each plate body 1 has a sealing gasket 4 on one side and no sealing gasket 4 on the other side.

[0082] The heat exchanger can improve the deformation resistance of the sealing groove 3 while ensuring the positioning accuracy and fixing reliability of the sealing gasket 4, thereby achieving good sealing effect and long service life.

[0083] In some embodiments, as Figure 14 As shown, the sealing areas 2 of two adjacent heat exchange plates cooperate with each other, and the difference between the top length of the first ridge 7 of each heat exchange plate and the bottom length of the first valley 8 at the opposite position of the adjacent heat exchange plates is -1mm to 1mm.

[0084] like Figure 14 As shown, D3 is the top length of the first ridge 7 of the heat exchange plate, and D4 is the bottom length of the first valley 8 of the heat exchange plate. The difference between the top length of the first ridge 7 of each heat exchange plate and the bottom length of the first valley 8 at the opposite position of the adjacent heat exchange plate is -1mm to 1mm, that is, D3-D4=-1mm~1mm. This ensures that the lengths of the first ridge 7 and the first valley 8 are basically equal, and the force is evenly distributed, preventing one heat exchange plate from collapsing another heat exchange plate when assembling the heat exchanger. Preferably, D3=D4, so that the heat exchange plates are more evenly distributed and have better stability.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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: include: A plate body is provided with a sealing area and a heat exchange area, a sealing groove is provided in the sealing area, and the sealing groove is used to install a sealing gasket, the heat exchange area is located on the inner side of the sealing area, and a heat exchange flow channel is provided in the heat exchange area, and the depth of the sealing groove is less than the depth of the heat exchange flow channel and greater than half the depth of the heat exchange flow channel.

2. The heat exchange plate according to claim 1, characterized in that The ratio of the depth of the sealing groove to the depth of the heat exchange channel is 0.6-0.

8.

3. The heat exchange plate according to claim 1, characterized in that One side of the sealing groove is a pressure side that contacts 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 plate body outside the non-pressure side, and the bottom surface of the sealing groove extends toward the first valley to form a first platform.

4. The heat exchange plate according to claim 3, characterized in that The length of the first platform is 1 mm to 3 mm.

5. The heat exchange plate according to claim 3, characterized in that: Second ridges and second valleys are alternately arranged on the plate outside the pressure-bearing side, and a second platform is formed on the bottom surface of the sealing groove extending toward the second valley.

6. The heat exchange plate according to claim 5, characterized in that: The length of the first platform is greater than or equal to the length of the second platform.

7. The heat exchange plate according to claim 1, characterized in that The sealing groove is divided into a single sealing section sealing groove, a second sealing section sealing groove and a second non-sealing section sealing groove. The depth of the single sealing section sealing groove and the second sealing section sealing groove are equal, and the depth of the two non-sealing section sealing grooves is less than or equal to the depth of the single sealing section sealing groove or the second sealing section sealing groove.

8. The heat exchange plate according to claim 7, characterized in that: The difference between the depth of the first sealing section sealing groove or the second sealing section sealing groove and the depth of the second non-sealing section sealing groove is 0.2 mm to 0.6 mm.

9. A heat exchanger, characterized in that: It comprises a plurality of stacked heat exchange plates according to any one of claims 1 to 8, wherein a sealing gasket is provided between two adjacent heat exchange plates, and the sealing gasket is installed in the sealing groove.

10. The heat exchanger according to claim 9, characterized in that The sealing areas of two adjacent heat exchange plates cooperate with each other, and the difference between the length of the first ridge top surface of each heat exchange plate and the length of the first valley bottom surface at the opposite position of the adjacent heat exchange plates is -1mm to 1mm.

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