Heat exchange plate, plate heat exchanger and heat exchange system

Abstract

The utility model provides a kind of heat exchange plate, plate heat exchanger and heat exchange system, four corners of heat exchange plate are respectively equipped with corner hole, and welding ring area is formed with the outer periphery of corner hole, and transition structure is arranged with the outer periphery of welding ring area, and transition structure includes two height zones, two width zones and four diagonal zones, one diagonal zone is between one height zone and one width zone, height zone includes first protrusion, width zone includes second protrusion, diagonal zone includes third protrusion, and the protrusion height of first protrusion, second protrusion and third protrusion is equal and less than the protrusion height of heat exchange protrusion.The utility model heat exchange plate can effectively enhance the structure strength and compression strength of the outer periphery welding ring area of corner hole and the relative linking area of corner of heat exchange plate and corner, to avoid deformation, cracking phenomenon, to effectively eliminate the leakage risk of heat exchange medium, and then ensure heat exchange performance.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange technology, and in particular to a heat exchange plate, a plate heat exchanger having the heat exchange plate, and a heat exchange system having the plate heat exchanger. Background Technology

[0002] A plate heat exchanger is a high-efficiency heat exchanger composed of multiple corrugated metal heat exchange plates stacked together. Inside, two working fluids are isolated from each other by the heat exchange plates, allowing for heat exchange through intermittent flow. Plate heat exchangers are characterized by high heat exchange efficiency, light weight, small footprint, compact structure, and long service life. They are commonly used in water-to-water heat exchange, water-to-refrigerant heat exchange, and refrigerant-to-refrigerant heat exchange, and have a large market and promising development prospects.

[0003] Heat exchange plates are the core components of plate heat exchangers. The heat exchange medium is usually in a state of high and low pressure switching, and the maximum working pressure can reach more than 4MPa, which puts high pressure resistance requirements on the heat exchange plates.

[0004] The existing heat exchange plates have corner holes at each of the four corners to allow the corresponding heat exchange medium to enter and exit the interior of the plate heat exchanger. Because the corner holes are opened through the corners of the heat exchange plates, the structural strength and compressive strength of the corners and the outer welded ring area of ​​the corner holes are relatively weak. Since adjacent heat exchange plates are welded together through the outer welded ring area of ​​the corner holes, under the high-pressure impact of the high-pressure heat exchange medium, the corners and the outer welded ring area of ​​the corner plates with weak structural strength and compressive strength are prone to deformation and cracking, leading to leakage of the heat exchange medium.

[0005] To improve structural strength, the existing method is to arrange multiple protrusions at equal intervals around the circumference of the corner hole. However, this method can only enhance the structural strength of the outer welded ring area of ​​the corner hole, but cannot enhance the structural strength of the relative connection area between the corner hole and the corner where it is located. That is, the relative connection area between the corner of the heat exchange plate and the corner hole still has weak structural strength and compressive strength. As a result, the relative connection area between the corner of the heat exchange plate and the corner hole can still deform and crack, and there is still a possibility of leakage of the heat exchange medium. Summary of the Invention

[0006] To achieve the primary objective of this invention, a heat exchange plate is provided that can effectively enhance the structural strength and compressive strength of the outer periphery welding ring area of ​​the corner hole, thereby preventing deformation and cracking of the corner hole. Simultaneously, it can effectively enhance the structural strength and compressive strength of the relative connection area between the corner of the heat exchange plate and the corner hole, preventing deformation and cracking of the relative connection area between the corner of the heat exchange plate and the corner hole, thus effectively eliminating the risk of heat exchange medium leakage and ensuring heat exchange performance.

[0007] To achieve the second objective of this utility model, this utility model provides a plate heat exchanger having the above-mentioned heat exchange plates.

[0008] To achieve the third objective of this utility model, this utility model provides a heat exchange system having the above-mentioned plate heat exchanger.

[0009] To achieve the primary objective of this utility model, a heat exchange plate is provided. Corner holes are provided at the four corners of the heat exchange plate. A welding ring area is formed around the outer periphery of each corner hole. A transition structure is arranged around the outer periphery of each welding ring area. A heat exchange structure is arranged around the outer periphery of the transition structure. The heat exchange structure includes multiple heat exchange protrusions arranged in both the height and width directions of the heat exchange plate. The transition structure includes two height regions, two width regions, and four diagonal regions. The two height regions are symmetrically arranged about the corner holes in the height direction, and the two width regions are symmetrically arranged about the corner holes in the width direction. A diagonal region is located between one height region and one width region. The height region includes a first protrusion that extends from the outer periphery of the welding ring region toward the heat exchange protrusion in the height direction. The width region includes a second protrusion that extends from the outer periphery of the welding ring region toward the heat exchange protrusion in the width direction. The diagonal region includes a third protrusion, one end of which is connected to the outer periphery of the welding ring region. The transverse segment of the third protrusion extends toward the heat exchange protrusion in the width direction, and the vertical segment of the third protrusion extends toward the heat exchange protrusion in the height direction. The transverse segment and the vertical segment are connected. The protrusion directions of the first, second, and third protrusions are consistent with the protrusion direction of the heat exchange protrusion, and the protrusion heights of the first, second, and third protrusions are equal and less than the protrusion height of the heat exchange protrusion.

[0010] As can be seen from the above scheme, the heat exchange plate of this utility model has a transition structure surrounding the outer periphery of the welding ring area around the corner hole. The transition structure includes two height areas, two width areas, and four diagonal areas. The two height areas are symmetrically arranged about the corner hole in the height direction, and the two width areas are symmetrically arranged about the corner hole in the width direction. One diagonal area is located between one height area and one width area, so that one diagonal area near the corner of the heat exchange plate is opposite to the corner. The heat exchange structure is surrounded by a heat exchange structure, thereby making the heat exchange plate... The corner of the heat exchange plate and the area where it connects with the corner hole are provided with multiple heat exchange protrusions and a diagonal area. The diagonal area of ​​this invention includes a third protrusion. One end of the third protrusion is connected to the outer periphery of the welding ring area. The horizontal section of the third protrusion extends toward the heat exchange protrusion in the width direction, and the vertical section of the third protrusion extends toward the heat exchange protrusion in the height direction. This can effectively enhance the structural strength and compressive strength of the area where the corner of the heat exchange plate connects with the corner hole, so as to avoid deformation and cracking in the area where the corner of the heat exchange plate connects with the corner hole.

[0011] Meanwhile, the transition structure of the heat exchange plate of this utility model includes a first protrusion in the height region, which extends from the outer periphery of the welding ring region toward the heat exchange protrusion in the height direction. The width region of the transition structure includes a second protrusion, which extends from the outer periphery of the welding ring region toward the heat exchange protrusion in the width direction. The two height regions of the transition structure are symmetrically arranged about the corner hole in the height direction, and the two width regions are symmetrically arranged about the corner hole in the width direction. A diagonal region is located between a height region and a width region, which can effectively enhance the structural strength and compressive strength of the outer periphery welding ring region of the corner hole, so as to avoid deformation and cracking of the corner hole. The two height regions, two width regions and four diagonal regions of the symmetrically arranged transition structure can make the distribution of the heat exchange medium into the fluid channel through the corner hole more uniform and smooth, thereby improving the heat exchange effect and heat exchange efficiency.

[0012] Therefore, the heat exchange plate of this invention can effectively enhance the structural strength and compressive strength of the outer welded ring area of ​​the corner hole, so as to avoid deformation and cracking of the corner hole. At the same time, it can effectively enhance the structural strength and compressive strength of the relative connection area between the corner of the heat exchange plate and the corner hole, so as to avoid deformation and cracking of the relative connection area between the corner of the heat exchange plate and the corner hole. This effectively eliminates the risk of leakage of heat exchange medium, improves the pressure fatigue resistance of plate heat exchanger, and thus ensures heat exchange performance.

[0013] A further embodiment is that the height region includes a plurality of first protrusions, which are arranged at equal intervals in the width direction with a first spacing; and / or, the width region includes a plurality of second protrusions, which are arranged at equal intervals in the height direction with a second spacing; and / or, the diagonal region includes a plurality of third protrusions, the vertical segments of which are arranged at equal intervals in the width direction with a third spacing, and the transverse segments of which are arranged at equal intervals in the height direction with a fourth spacing.

[0014] A further embodiment is that the first spacing is equal to the third spacing, the second spacing is equal to the fourth spacing, and the spacing between the vertical segment and the adjacent first protrusion in the width direction is equal to the first spacing, and the spacing between the horizontal segment and the adjacent second protrusion in the height direction is equal to the second spacing; and / or, the widths of the first protrusion, the second protrusion, the horizontal segment and the vertical segment are equal.

[0015] A further embodiment is that a first reinforcing protrusion connects two adjacent first protrusions, the protrusion direction of the first reinforcing protrusion is consistent with the protrusion direction of the first protrusion, and the protrusion height of the first reinforcing protrusion is less than the protrusion height of the first protrusion; and / or, a second reinforcing protrusion connects the vertical segment to an adjacent first protrusion, the protrusion direction of the second reinforcing protrusion is consistent with the protrusion direction of the first protrusion, and the protrusion height of the second reinforcing protrusion is less than the protrusion height of the first protrusion; and / or, a third reinforcing protrusion connects two adjacent second protrusions, the protrusion direction of the third reinforcing protrusion is consistent with the protrusion direction of the second protrusion, and the protrusion height of the third reinforcing protrusion is less than the protrusion height of the second protrusion; and / or, a fourth reinforcing protrusion connects the transverse segment to an adjacent second protrusion, the protrusion direction of the fourth reinforcing protrusion is consistent with the protrusion direction of the second protrusion, and the protrusion height of the fourth reinforcing protrusion is less than the protrusion height of the second protrusion.

[0016] A further embodiment is that the first protrusion extends in a straight line in the height direction, or the first protrusion extends in a wavy shape in the height direction; and / or, the second protrusion extends in a straight line in the width direction, or the second protrusion extends in a wavy shape in the width direction; and / or, the transverse segment extends in a straight line in the width direction, or the transverse segment extends in a wavy shape in the width direction; and / or, the vertical segment extends in a straight line in the height direction, or the vertical segment extends in a wavy shape in the height direction.

[0017] A further embodiment is that the protrusion height of the first protrusion, the second protrusion, and the third protrusion is between 0.1 and 0.9 times the protrusion height of the heat exchange protrusion; and / or, the width of the first protrusion, the second protrusion, the transverse section, and the vertical section is between 0.2 mm and 3 mm.

[0018] A further embodiment is that the first protrusion has a trapezoidal cross-section, with the wide portion of the first protrusion connecting to the heat exchange plate and the narrow portion of the first protrusion away from the plate; and / or, the second protrusion has a trapezoidal cross-section, with the wide portion of the second protrusion connecting to the heat exchange plate and the narrow portion of the second protrusion away from the plate; and / or, the transverse section has a trapezoidal cross-section, with the wide portion of the transverse section connecting to the heat exchange plate and the narrow portion of the transverse section away from the plate; and / or, the vertical section has a trapezoidal cross-section, with the wide portion of the vertical section connecting to the heat exchange plate and the narrow portion of the vertical section away from the plate.

[0019] A further embodiment is that the base angle of the trapezoidal cross-section of the first protrusion is between 20° and 50°; and / or, the base angle of the trapezoidal cross-section of the second protrusion is between 20° and 50°; and / or, the base angle of the trapezoidal cross-section of the transverse segment is between 20° and 50°; and / or, the base angle of the trapezoidal cross-section of the vertical segment is between 20° and 50°.

[0020] To achieve the second objective of this utility model, this utility model provides a plate heat exchanger, including at least three heat exchange plates, wherein the heat exchange plates are as described above, and the multiple heat exchange plates are stacked in the thickness direction of the plate heat exchanger; in three adjacent heat exchange plates, the heat exchange protrusion of the first heat exchange plate contacts the heat exchange protrusion of the second heat exchange plate to form a first fluid channel; the welded ring area of ​​the second heat exchange plate contacts the welded ring area of ​​the third heat exchange plate, and the plate body of the second heat exchange plate contacts the plate body of the third heat exchange plate to form a second fluid channel.

[0021] To achieve the third objective of this utility model, this utility model provides a heat exchange system, including a plate heat exchanger, wherein the plate heat exchanger is the plate heat exchanger described above. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the first embodiment of the plate heat exchanger of this utility model.

[0023] Figure 2 This is a partial structural cross-sectional view of the first embodiment of the plate heat exchanger of this utility model.

[0024] Figure 3 This is a front view of the heat exchange plates in the first embodiment of the plate heat exchanger of this utility model.

[0025] Figure 4 yes Figure 3 Enlarged view at point A.

[0026] Figure 5 This is a partial structural diagram of the heat exchange plates in the first embodiment of the plate heat exchanger of this utility model.

[0027] Figure 6 This is a schematic diagram of the first embodiment of the transverse and vertical sections of the first protrusion / second protrusion / third protrusion in the first embodiment of the plate heat exchanger of this utility model.

[0028] Figure 7 This is a schematic diagram of the second embodiment of the transverse and vertical sections of the first, second, and third protrusions in the first embodiment of the plate heat exchanger of this utility model.

[0029] Figure 8 This is a partial structural diagram of the heat exchange plates in the second embodiment of the plate heat exchanger of this utility model.

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0031] First embodiment of plate heat exchanger:

[0032] See Figures 1 to 5This embodiment discloses a plate heat exchanger 10, including at least three heat exchange plates 13, which are stacked in the thickness direction Z of the plate heat exchanger 10. In three adjacent heat exchange plates 13, the heat exchange protrusion 134 of the first heat exchange plate 13 contacts the heat exchange protrusion 134 of the second heat exchange plate 13 to form a first fluid channel 15; the welded ring region 133 of the second heat exchange plate 13 contacts the welded ring region 133 of the third heat exchange plate 13, and the plate body of the second heat exchange plate 13 contacts the plate body of the third heat exchange plate 13 to form a second fluid channel 16. Specifically, the plate heat exchanger 10 in this embodiment also includes a connector 11, an upper end plate 12, and a lower end plate 14. Copper foil solder is placed at the contact position between the connector 11 and the upper end plate 12, copper foil solder is placed at the contact position between the upper end plate 12 and the adjacent heat exchange plate 13, copper foil solder is placed at the contact position between the lower end plate 14 and the adjacent heat exchange plate 13, and copper foil solder is placed at the contact position between two adjacent heat exchange plates 13. Thus, the copper foil solder is melted at high temperature by vacuum brazing to form an integrated plate heat exchanger 10.

[0033] In this embodiment, corner holes 132 are provided at the four corners 131 of the heat exchange plate 13. A welding ring area 133 is formed around the outer periphery of each corner hole 132. A transition structure is provided around the outer periphery of each welding ring area 133, and a heat exchange structure is provided around the outer periphery of the transition structure. The heat exchange structure includes multiple heat exchange protrusions 134, which are arranged in the height direction Y and the width direction X of the heat exchange plate 13. Specifically, the corner hole 132 is generally circular, but it can also be square, elliptical, etc., and the outer periphery welding ring area 133 of the corner hole 132 can be an irregular polygon. The radial width of the outer periphery welding ring area 133 of the corner hole 132 is between 3 mm and 10 mm.

[0034] Furthermore, the transition structure in this embodiment includes two height regions 135, two width regions 136, and four diagonal regions 137. The two height regions 135 are symmetrically arranged about the corner hole 132 in the height direction Y, the two width regions 136 are symmetrically arranged about the corner hole 132 in the width direction X, and a diagonal region 137 is located between a height region 135 and a width region 136.

[0035] Furthermore, the height region 135 of the transition structure in this embodiment includes a first protrusion 1351, which extends from the outer periphery of the welding ring region 133 toward the heat exchange protrusion 134 in the height direction Y. The width region 136 of the transition structure in this embodiment includes a second protrusion 1361, which extends from the outer periphery of the welding ring region 133 toward the heat exchange protrusion 134 in the width direction X. The diagonal region 137 of the transition structure in this embodiment includes a third protrusion 1370, one end of which is connected to the outer periphery of the welding ring region 133. The transverse segment 1372 of the third protrusion 1370 extends toward the heat exchange protrusion 134 in the width direction X, and the vertical segment 1371 of the third protrusion 1370 extends toward the heat exchange protrusion 134 in the height direction Y. The transverse segment 1372 and the vertical segment 1371 are connected. Furthermore, in this embodiment, the protrusion directions of the first protrusion 1351, the second protrusion 1361, and the third protrusion 1370 are consistent with the protrusion direction of the heat exchange protrusion 134, and the protrusion heights H2 of the first protrusion 1351, the second protrusion 1361, and the third protrusion 1370 are equal and less than the protrusion height H1 of the heat exchange protrusion 134. Specifically, in this embodiment, the heat exchange plate 13 is typically a thin metal plate with a thickness of 0.1 mm to 0.8 mm, and the heat exchange protrusions 134, the first protrusion 1351, the second protrusion 1361, and the third protrusion 1370 are formed by die stamping. Further, the intersecting positions of the relevant connections are smoothly transitioned using rounded corners, with a corner radius of not less than 0.2 mm.

[0036] In this embodiment, a transition structure is provided around the outer periphery of the welding ring area 133 on the outer periphery of the heat exchange plate 13 with the corner hole 132. The transition structure includes two height areas 135, two width areas 136, and four diagonal areas 137. The two height areas 135 are symmetrically arranged about the corner hole 132 in the height direction Y, and the two width areas 136 are symmetrically arranged about the corner hole 132 in the width direction X. One diagonal area 137 is located between one height area 135 and one width area 136, such that one diagonal area 137 near the corner 131 of the heat exchange plate 13 is opposite to the corner 131. The heat exchange structure is provided around the outer periphery of the transition structure, so that the corner 131 of the heat exchange plate 13 is aligned with the corner hole. The relative connection area of ​​132 is provided with multiple heat exchange protrusions 134 and a diagonal area 137. In this embodiment, the diagonal area 137 includes a third protrusion 1370. One end of the third protrusion 1370 is connected to the outer periphery of the welding ring area 133. The transverse segment 1372 of the third protrusion 1370 extends toward the heat exchange protrusion 134 in the width direction X, and the vertical segment 1371 of the third protrusion 1370 extends toward the heat exchange protrusion 134 in the height direction Y. This can effectively enhance the structural strength and compressive strength of the relative connection area between the corner 131 of the heat exchange plate 13 and the corner hole 132, so as to avoid deformation and cracking in the relative connection area between the corner 131 of the heat exchange plate 13 and the corner hole 132.

[0037] Meanwhile, in this embodiment, the height region 135 of the transition structure of the heat exchange plate 13 includes a first protrusion 1351, which extends from the outer periphery of the welding ring region 133 toward the heat exchange protrusion 134 in the height direction Y. The width region 136 of the transition structure includes a second protrusion 1361, which extends from the outer periphery of the welding ring region 133 toward the heat exchange protrusion 134 in the width direction X. The two height regions 135 of the transition structure are symmetrically arranged about the corner hole 132 in the height direction Y, and the two width regions 136 are symmetrically arranged about the width of the corner hole 132. The corner holes 132 are symmetrically arranged in the X direction. A diagonal area 137 is located between a height area 135 and a width area 136, which can effectively enhance the structural strength and compressive strength of the outer peripheral welded ring area 133 of the corner hole 132, so as to avoid deformation and cracking of the corner hole 132. Furthermore, the two height areas 135, two width areas 136 and four diagonal areas 137 of the symmetrically arranged transition structure can make the distribution of the heat exchange medium into the fluid channel through the corner hole 132 more uniform and smooth, thereby improving the heat exchange effect and heat exchange efficiency.

[0038] Therefore, in this embodiment, the heat exchange plate 13 can effectively enhance the structural strength and compressive strength of the outer peripheral welded ring area 133 of the corner hole 132, so as to avoid deformation and cracking of the corner hole 132. At the same time, it can effectively enhance the structural strength and compressive strength of the relative connection area between the corner 131 of the heat exchange plate 13 and the corner hole 132, so as to avoid deformation and cracking of the relative connection area between the corner 131 of the heat exchange plate 13 and the corner hole 132. This effectively eliminates the risk of leakage of heat exchange medium, improves the pressure fatigue resistance of the plate heat exchanger 10, and thus ensures heat exchange performance.

[0039] To further enhance structural strength and compressive strength, the height region 135 of the transition structure in this embodiment includes a plurality of first protrusions 1351, which are arranged at equal intervals in the width direction X with a first spacing. The width region 136 of the transition structure in this embodiment includes a plurality of second protrusions 1361, which are arranged at equal intervals in the height direction Y with a second spacing. The diagonal region 137 of the transition structure in this embodiment includes a plurality of third protrusions 1370, the vertical segments 1371 of the plurality of third protrusions 1370 are arranged at equal intervals in the width direction X with a third spacing, and the transverse segments 1372 of the plurality of third protrusions 1370 are arranged at equal intervals in the height direction Y with a fourth spacing.

[0040] Specifically, in this embodiment, the first spacing is equal to the third spacing, the second spacing is equal to the fourth spacing, and the spacing between the vertical segment 1371 and the adjacent first protrusion 1351 in the width direction X is equal to the first spacing, and the spacing between the horizontal segment 1372 and the adjacent second protrusion 1361 in the height direction Y is equal to the second spacing. This makes the vertical segments 1371 and the horizontal segments 1372 of the multiple first protrusions 1351, multiple second protrusions 1361, and multiple third protrusions 1370 evenly arranged in the width direction X and the height direction Y, respectively. This ensures that the transition structure of this embodiment is evenly arranged around the outer periphery of the welding ring area 133 of the corner hole 132, thereby uniformly enhancing the structural strength and compressive strength in the circumferential direction of the corner hole 132.

[0041] Furthermore, in this embodiment, the cross-section of the first protrusion 1351 is trapezoidal, the wide portion of the first protrusion 1351 connects to the plate body of the heat exchange plate 13, and the narrow portion of the first protrusion 1351 is away from the plate body of the heat exchange plate 13. In this embodiment, the cross-section of the second protrusion 1361 is trapezoidal, the wide portion of the second protrusion 1361 connects to the plate body of the heat exchange plate 13, and the narrow portion of the second protrusion 1361 is away from the plate body of the heat exchange plate 13. In this embodiment, the cross-section of the transverse segment 1372 of the third protrusion 1370 is trapezoidal, the wide portion of the transverse segment 1372 connects to the plate body of the heat exchange plate 13, and the narrow portion of the transverse segment 1372 of the third protrusion 1370 is away from the plate body of the heat exchange plate 13. In this embodiment, the cross-section of the vertical segment 1371 is trapezoidal, the wide portion of the vertical segment 1371 connects to the plate body of the heat exchange plate 13, and the narrow portion of the vertical segment 1371 is away from the plate body of the heat exchange plate 13. Furthermore, in this embodiment, the base angle of the trapezoidal cross-section of the first protrusion 1351 is between 20° and 50°; the base angle of the trapezoidal cross-section of the second protrusion 1361 is between 20° and 50°; the base angle of the trapezoidal cross-section of the transverse segment 1372 of the third protrusion 1370 is between 20° and 50°; and the base angle of the trapezoidal cross-section of the vertical segment 1371 of the third protrusion 1370 is between 20° and 50°. Alternatively, in this embodiment, the cross-sections of the first protrusion 1351, the second protrusion 1361, the transverse segment 1372, and the vertical segment 1371 are triangular, such as... Figure 6 As shown.

[0042] Furthermore, in this embodiment, the protrusion height H2 of the first protrusion 1351, the second protrusion 1361, and the third protrusion 1370 is between 0.1 and 0.9 times the protrusion height H1 of the heat exchange protrusion 134. Also, in this embodiment, the width of the first protrusion 1351, the second protrusion 1361, the transverse segment 1372, and the vertical segment 1371 is between 0.2 mm and 3 mm, and the widths of the first protrusion 1351, the second protrusion 1361, the transverse segment 1372, and the vertical segment 1371 are equal, thereby enhancing the structural strength and compressive strength uniformly in the circumferential direction of the corner hole 132. Furthermore, in this embodiment, the lengths of the first protrusion 1351, the second protrusion 1361, the transverse segment 1372, and the vertical segment 1371 are set according to the width of the outer peripheral welding ring area 133 of the corner hole 132 in the radial direction of the corner hole 132, so as to ensure that the distance from the outer diameter of the corner hole 132 is about 3 mm. The first spacing, the third spacing, the second spacing, and the fourth spacing are 3 to 5 times the width of the first protrusion 1351, which has little impact on the flow of the heat exchange medium.

[0043] See Figure 6 In the first embodiment, the first protrusion 1351 extends in a straight line in the height direction Y, and the second protrusion 1361 extends in a straight line in the width direction X. The horizontal segment 1372 extends in a straight line in the width direction X, and the vertical segment 1371 extends in a straight line in the height direction Y. That is, the first protrusion 1351, the second protrusion 1361, the horizontal segment 1372 and the vertical segment 1371 all extend in a straight line.

[0044] See Figure 7 In the second embodiment, the first protrusion 1351' extends in a wave-like shape in the height direction Y, and the second protrusion 1361' extends in a wave-like shape in the width direction X. The horizontal segment 1372' extends in a wave-like shape in the width direction X, and the vertical segment 1371' extends in a wave-like shape in the height direction Y. That is, the first protrusion 1351', the second protrusion 1361', the horizontal segment 1372', and the vertical segment 1371' all extend in a wave-like shape.

[0045] Second embodiment of plate heat exchanger:

[0046] As an explanation of the second embodiment of the plate heat exchanger of this utility model, the following description only focuses on the differences from the first embodiment of the plate heat exchanger.

[0047] See Figure 8In this embodiment, a first reinforcing protrusion 1381 connects two adjacent first protrusions 1351 of the heat exchange plate 13'. The protrusion direction of the first reinforcing protrusion 1381 is consistent with the protrusion direction of the first protrusion 1351, and the protrusion height of the first reinforcing protrusion 1381 is less than the protrusion height of the first protrusion 1351. Furthermore, in this embodiment, a second reinforcing protrusion 1382 connects the vertical segment 1371 to an adjacent first protrusion 1351. The protrusion direction of the second reinforcing protrusion 1382 is consistent with the protrusion direction of the first protrusion 1351, and the protrusion height of the second reinforcing protrusion 1382 is less than the protrusion height of the first protrusion 1351. In this embodiment, a third reinforcing protrusion 1384 connects two adjacent second protrusions 1361. The protrusion direction of the third reinforcing protrusion 1384 is consistent with the protrusion direction of the second protrusion 1351. The protrusions of 361 are aligned in the same direction, and the protrusion height of the third reinforcing protrusion 1384 is less than that of the second protrusion 1361. In this embodiment, a fourth reinforcing protrusion 1383 is connected between the transverse segment 1372 and the adjacent second protrusion 1361. The protrusion direction of the fourth reinforcing protrusion 1383 is aligned with that of the second protrusion 1361, and the protrusion height of the fourth reinforcing protrusion 1383 is less than that of the second protrusion 1361. This results in the transition structure of this embodiment forming a cross-grid arrangement, thereby further enhancing the structural strength and compressive strength of the outer periphery welding ring area 133 of the corner hole 132, as well as the structural strength and compressive strength of the relative connection area between the corner 131 of the heat exchange plate 13 and the corner hole 132. This effectively eliminates the risk of leakage of the heat exchange medium and ensures heat exchange performance.

[0048] The above embodiments are merely preferred examples of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles of this utility model patent application should be included within the scope of this utility model patent application.

Claims

1. A heat exchange plate, four corners of the heat exchange plate are respectively provided with corner holes, an outer periphery of each of the corner holes is surrounded by a welding ring area, and characterized in that: an outer periphery of one of the welding ring areas is provided with a transition structure, an outer periphery of the transition structure is provided with a heat exchange structure, the heat exchange structure comprises a plurality of heat exchange protrusions, the plurality of heat exchange protrusions are arranged in a height direction and a width direction of the heat exchange plate, the transition structure comprises two height areas, two width areas and four diagonal areas, the two height areas are symmetrically arranged about the corner hole in the height direction, the two width areas are symmetrically arranged about the corner hole in the width direction, and one of the diagonal areas is located between one of the height areas and one of the width areas; the height area comprises a first protrusion, the first protrusion extends from the outer periphery of the welding ring area towards the heat exchange protrusion in the height direction, the width area comprises a second protrusion, the second protrusion extends from the outer periphery of the welding ring area towards the heat exchange protrusion in the width direction, the diagonal area comprises a third protrusion, one end of the third protrusion is connected with the outer periphery of the welding ring area, a transverse section of the third protrusion extends towards the heat exchange protrusion in the width direction, and a vertical section of the third protrusion extends towards the heat exchange protrusion in the height direction, and the transverse section and the vertical section are connected; protrusion directions of the first protrusion, the second protrusion and the third protrusion are consistent with a protrusion direction of the heat exchange protrusion, and protrusion heights of the first protrusion, the second protrusion and the third protrusion are equal and less than a protrusion height of the heat exchange protrusion.

2. The heat exchange plate according to claim 1, characterized in that: the height area comprises a plurality of the first protrusions, and the plurality of the first protrusions are arranged at a first interval in the width direction; and / or, the width area comprises a plurality of the second protrusions, and the plurality of the second protrusions are arranged at a second interval in the height direction; and / or, the diagonal area comprises a plurality of the third protrusions, and the vertical sections of the plurality of the third protrusions are arranged at a third interval in the width direction, and the transverse sections of the plurality of the third protrusions are arranged at a fourth interval in the height direction.

3. The heat exchange plate according to claim 2, characterized in that: the first interval is equal to the third interval, the second interval is equal to the fourth interval, and an interval between the vertical section and the adjacent first protrusion in the width direction is equal to the first interval, and an interval between the transverse section and the adjacent second protrusion in the height direction is equal to the second interval; and / or, widths of the first protrusion, the second protrusion, the transverse section and the vertical section are equal.

4. The heat exchange plate according to claim 2, characterized in that: two adjacent first protrusions are connected with a first reinforcing protrusion, a protrusion direction of the first reinforcing protrusion is consistent with a protrusion direction of the first protrusion, and a protrusion height of the first reinforcing protrusion is less than a protrusion height of the first protrusion. ​ ​ ​ ​ ​ ​ ​ ​ ​ And / or, a second reinforcing protrusion is connected between the vertical section and the adjacent first protrusion, the protruding direction of the second reinforcing protrusion is consistent with the protruding direction of the first protrusion, and the protruding height of the second reinforcing protrusion is less than the protruding height of the first protrusion; And / or, a third reinforcing protrusion is connected between two adjacent second protrusions, the protruding direction of the third reinforcing protrusion is consistent with the protruding direction of the second protrusion, and the protruding height of the third reinforcing protrusion is less than the protruding height of the second protrusion; And / or, a fourth reinforcing protrusion is connected between the horizontal section and the adjacent second protrusion, the protruding direction of the fourth reinforcing protrusion is consistent with the protruding direction of the second protrusion, and the protruding height of the fourth reinforcing protrusion is less than the protruding height of the second protrusion.

5. The heat exchange plate according to claim 1, wherein: The first protrusion extends linearly in the height direction, or the first protrusion extends in a wave shape in the height direction; And / or, the second protrusion extends linearly in the width direction, or the second protrusion extends in a wave shape in the width direction; And / or, the horizontal section extends linearly in the width direction, or the horizontal section extends in a wave shape in the width direction; And / or, the vertical section extends linearly in the height direction, or the vertical section extends in a wave shape in the height direction.

6. The heat exchange plate according to claim 1, wherein: The protruding height of the first protrusion, the second protrusion and the third protrusion is between 0.1 times and 0.9 times the protruding height of the heat exchange protrusion; And / or, the width of the first protrusion, the second protrusion, the horizontal section and the vertical section is between 0.2 mm and 3 mm.

7. The heat exchange plate according to any one of claims 1 to 6, wherein: The cross section of the first protrusion is trapezoidal, the wide part of the first protrusion connects the plate body of the heat exchange plate, and the narrow part of the first protrusion is away from the plate body; And / or, the cross section of the second protrusion is trapezoidal, the wide part of the second protrusion connects the plate body of the heat exchange plate, and the narrow part of the second protrusion is away from the plate body; And / or, the cross section of the horizontal section is trapezoidal, the wide part of the horizontal section connects the plate body of the heat exchange plate, and the narrow part of the horizontal section is away from the plate body; And / or, the cross section of the vertical section is trapezoidal, the wide part of the vertical section connects the plate body of the heat exchange plate, and the narrow part of the vertical section is away from the plate body.

8. The heat exchange plate according to claim 7, wherein: The base angle of the trapezoidal cross section of the first protrusion is between 20° and 50°; And / or, the base angle of the trapezoidal cross section of the second protrusion is between 20° and 50°; And / or, the base angle of the trapezoidal cross section of the horizontal section is between 20° and 50°; And / or, the base angle of the trapezoidal cross section of the vertical section is between 20° and 50°.

9. A plate heat exchanger comprising at least three heat exchange plates, wherein: The heat exchange sheet is the heat exchange sheet in any one of claims 1 to 8. A plurality of the heat exchange sheets are stacked in a thickness direction of the plate heat exchanger. Among the three adjacent heat exchange sheets, the heat exchange protrusion of the first heat exchange sheet is in contact with the heat exchange protrusion of the second heat exchange sheet to form a first fluid channel; the welding ring area of the second heat exchange sheet is in contact with the welding ring area of the third heat exchange sheet, and the plate body of the second heat exchange sheet is in contact with the plate body of the third heat exchange sheet to form a second fluid channel.

10. A heat exchange system comprising a plate heat exchanger, characterized in that: The plate heat exchanger is the plate heat exchanger in claim 9.

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