Heat exchanger and heat exchange plate thereof

Abstract

The invention discloses a heat exchanger and a heat exchange plate thereof. The heat exchange plate is provided with a first side and a second side which are opposite to each other. Each heat exchange plate comprises a plurality of first concave parts and a plurality of second concave parts, the first concave parts are concave in the direction where the second side is located, and the second concave parts are concave in the direction where the first side is located; the first concave part has a first concave depth, the first concave part comprises a first bottom wall part, and the first bottom wall part has a first thickness; the second concave part has a second concave depth, the second concave part comprises a second bottom wall part, and the second bottom wall part has a second thickness; the first recess depth is larger than the second recess depth, and the first thickness is smaller than the second thickness. The structural design of the heat exchange plate is beneficial to improving the quality of the formed plate.

Description

Technical Field

[0001] The present application relates to the field of thermal management technology, and in particular to a heat exchanger and a heat exchange plate thereof. Background Art

[0002] The heat exchange plate is provided with a plurality of convex parts and a plurality of concave parts, the convex parts and the concave parts are arranged alternately, and the convex parts and the concave parts are connected by a curved surface transition.

[0003] Generally, the structures of the concave and convex areas of the heat exchange plate are symmetrical. When the heat exchange plate is formed, the forming depth is the same, the remaining thickness of the heat exchange plate at the forming location is the same, and the pressure that can be borne on both sides of the heat exchange plate is the same. The pressure drop on both sides of the heat exchange plate may not necessarily meet the requirement that the pressure drop on both sides of the heat exchange plate is within the bearing capacity of the heat exchange plate while meeting the heat exchange performance requirements. That is, the forming quality of the heat exchange plate does not meet the strength requirement for setting the pressure drop. Therefore, the symmetrical structure of the concave and convex areas has the problem that the heat exchange performance and the forming quality of the heat exchange plate cannot be taken into account at the same time. Summary of the invention

[0004] The purpose of the present application is to provide a heat exchanger and a heat exchange plate thereof, wherein the structural design of the heat exchange plate is conducive to improving the quality of the formed plate.

[0005] In order to solve the above technical problems, the present application provides a heat exchange plate, wherein the heat exchange plate has a first side and a second side opposite to each other; the heat exchange plate comprises a plurality of first recesses and a plurality of second recesses, wherein the first recesses are recessed toward the direction where the second side is located, and the second recesses are recessed toward the direction where the first side is located;

[0006] The first recess has a first recess depth, the first recess includes a first bottom wall portion, and the first bottom wall portion has a first thickness; the second recess has a second recess depth, the second recess includes a second bottom wall portion, and the second bottom wall portion has a second thickness; the first recess depth is greater than the second recess depth, and the first thickness is less than the second thickness.

[0007] The present application also provides a heat exchanger, comprising at least two stacked heat exchange plates, wherein the heat exchange plates are the heat exchange plates described above; the first recess forms a first convex portion on the second side of the heat exchange plate, and the second recess forms a second convex portion on the first side of the heat exchange plate;

[0008] Two adjacent heat exchange plates are arranged back to back, and are fixed by welding through the first protrusions facing each other, or are fixed by welding through the second protrusions facing each other.

[0009] The heat exchange plate provided in the present application includes a first recessed portion recessed toward the first side and a second recessed portion recessed toward the second side, the first recessed portion has a first recessed depth, the second recessed portion has a second recessed depth, the first recessed depth is greater than the second recessed depth, and the first recessed portion includes a first bottom wall portion, the first bottom wall portion has a first thickness, the second recessed portion includes a second bottom wall portion, the second bottom wall portion has a second thickness, the first thickness is less than the second thickness, when forming the first recessed portion and when forming the second recessed portion, the second recessed depth of the second recessed portion is less than the first recessed depth of the first recessed portion, and the second thickness is greater than the first thickness, that is, the stamping depth of the second recessed portion is shallow, and the structural strength of the heat exchange plate at the second recessed portion is high, when setting the pressure drop on both sides of the heat exchange plate, the upper limit of the pressure drop that can be borne by the side where the second recess is located is increased, that is, the aforementioned asymmetric structural design of the heat exchange plate is conducive to improving the forming quality of the heat exchange plate, thereby improving the upper limit of the pressure drop that can be borne by one side of the heat exchange plate, while satisfying the heat exchange performance and taking into account the forming quality of the heat exchange plate.

[0010] The heat exchanger provided in the present application includes the above-mentioned heat exchange plates and has the same technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A cross-sectional schematic diagram of a heat exchanger in an embodiment provided in the present application;

[0012] Figure 2 for Figure 1 A partial enlarged view of the middle C area;

[0013] Figure 3 This is a schematic structural diagram of a first side of a first heat exchange plate in an embodiment provided in the present application;

[0014] Figure 4 for Figure 3 A partial enlarged view of the A1 area;

[0015] Figure 5 for Figure 3 A schematic structural diagram of the second side of the first heat exchange plate shown;

[0016] Figure 6 for Figure 5 A partial enlarged view of the A2 area in the middle;

[0017] Figure 7 for Figure 3 A partial longitudinal cross-sectional schematic diagram of the second heat exchange plate shown;

[0018] Figure 8 for Figure 7 A schematic diagram of the partial structure of the second heat exchange plate;

[0019] Fig. 9 for Figure 3The schematic diagram of the partial cross section of the second heat exchange plate in the DD direction is shown;

[0020] Fig.10 This is a schematic structural diagram of the second side of the second heat exchange plate in an embodiment provided in the present application;

[0021] Fig.11 for Fig.10 A partial enlarged view of the B1 area;

[0022] Fig.12 for Fig.10 A schematic structural diagram of a first side of a second heat exchange plate is shown;

[0023] Fig.13 for Fig.12 A partial enlarged view of the B2 area;

[0024] Description of reference numerals:

[0025] Heat exchange plate 10, first heat exchange plate 10A, second heat exchange plate 10B;

[0026] Base plate portion 101, corner hole 102, flanges 103A, 103B, first side E1, second side E2, first fluid channel 104A, second fluid channel 104B;

[0027] The first concave portion 11, the first bottom wall portion 111, the first concave bottom wall surface 1111, and the first side wall surface 112;

[0028] The second concave portion 12, the second bottom wall portion 121, the second concave bottom wall surface 1211, and the second side wall surface 122;

[0029] The first convex portion 13, the first convex top wall surface 131,

[0030] The second convex portion 14, the second convex top wall surface 141,

[0031] A first transition curved surface portion 151, a second transition curved surface portion 152, a third transition curved surface portion 153, and a fourth transition curved surface portion 154;

[0032] The first recess depth Dp1, the first thickness δ1, the second recess depth Dp2, the second thickness δ2, the first size H1, the second size H2, the first distance S1, and the second distance S2. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] For ease of understanding and concise description, the heat exchanger and its heat exchange plate are explained together below, and the beneficial effects are not repeated.

[0035] Please refer to Figure 1 and Figure 2 , Figure 1 A cross-sectional schematic diagram of a heat exchanger in an embodiment provided in the present application; Figure 2 for Fig.11 A partial enlarged view of area C in the middle.

[0036] An embodiment of the present application provides a heat exchanger, which includes at least two heat exchange plates 10 arranged in a stacked manner, each heat exchange plate 10 having a first side and a second side opposite to each other, different fluids flowing on the first side and the second side of each heat exchange plate 10, and when arranged, two adjacent heat exchange plates 10 are arranged opposite to each other, that is, among the two adjacent heat exchange plates 10, the first side of one heat exchange plate 10 faces the first side of the other heat exchange plate 10, or the second side of one heat exchange plate 10 faces the second side of the other heat exchange plate 10. The opposite arrangement here can also be understood as the first sides or second sides of the two adjacent heat exchange plates 10 are in opposite directions.

[0037] Each heat exchange plate 10 of the heat exchanger can be divided into a first heat exchange plate 10A and a second heat exchange plate 10B according to their orientation. The first heat exchange plate 10A and the second heat exchange plate 10B are arranged alternately, and a fluid channel is formed between two adjacent heat exchange plates 10. These fluid channels include alternately arranged first fluid channels 104A and second fluid channels 104B. The first fluid channel 104A is used for the flow of the first fluid, and the second fluid channel 104B is used for the flow of the second fluid. During the flow, heat exchange can be performed between the first fluid and the second fluid.

[0038] This article focuses on improving the structure of the heat exchange plate 10 of the heat exchanger, which is described in detail below with reference to the accompanying drawings.

[0039] Please refer to Figure 3 , Figure 5 as well as Fig.10 , Fig.12 , Figure 3 and Figure 5 They are respectively structural schematic diagrams of a first side and a second side of a first heat exchange plate in an embodiment provided in the present application;

[0040] Fig.10 and Fig.12 They are schematic structural diagrams of the second side and the first side of the second heat exchange plate in an embodiment provided in the present application.

[0041] In this embodiment, the structures of the adjacent first heat exchange plate 10A and the second heat exchange plate 10B of the heat exchanger are similar, and both include a substrate portion 101, the substrate portion 101 has four corner holes 102, and the corner holes 102 are used for allowing fluid to flow into or out of the corresponding fluid channel. The peripheral wall of the substrate portion 101 has a flange portion bent toward one side to facilitate the stacking of the heat exchange plates 10; the flange portion 103A of the first heat exchange plate 10A and the flange portion 103B of the second heat exchange plate 10B are bent toward their respective non- Bending on the same side, for example, in the figure, the flange portion 103A of the first heat exchange plate 10A is bent toward the first side E1 of the first heat exchange plate 10A, and the flange portion 103B of the second heat exchange plate 10B is bent toward the second side E2 of the second heat exchange plate 10B. Since the first heat exchange plate 10A and the second heat exchange plate 10B are arranged opposite to each other when stacked, after stacking, the flange portion 103A of the first heat exchange plate 10A and the flange portion 103B of the second heat exchange plate 10B are both facing the same direction, such as Figure 1 and Figure 2 As shown, in Figure 1 and Figure 2 In the illustrated orientation, the flanged portion 103A of the first heat exchange plate 10A and the flanged portion 103B of the second heat exchange plate 10B are both facing upward in the figure.

[0042] Please refer to Figure 3 , and combined with Figures 4 to 8 ,in, Figure 4 for Figure 3 A partial enlarged view of the A1 area; Figure 5 for Figure 3 A schematic structural diagram of the second side of the first heat exchange plate shown;

[0043] Figure 6 for Figure 5 A partial enlarged view of the A2 area in the middle; Figure 7 for Figure 3 A partial longitudinal cross-sectional schematic diagram of the second heat exchange plate shown; Figure 8 for Figure 7 Schematic diagram of the local structure of the second heat exchange plate.

[0044] In this embodiment, the first heat exchange plate 10A has a first side E1 and a second side E2 opposite to each other. Figure 3 The figure shows the structure of the first heat exchange plate 10A on the first side E1. Figure 5 The figure shows the structure of the first heat exchange plate 10A on the second side E2.

[0045] The first heat exchange plate 10A includes a plurality of first recesses 11 and a plurality of second recesses 12. Taking the example in the figure, the first recesses 11 are recessed in the direction of the second side E2, and the second recesses 12 are recessed in the direction of the first side E1. It can be understood that the first recesses 11 are located on the first side E1 of the first heat exchange plate 10A, and the fluid flowing on the first side E1 of the first heat exchange plate 10A will flow through the first recesses 11. The second recesses 12 are located on the second side E2 of the first heat exchange plate 10A, and the fluid flowing on the second side E2 of the first heat exchange plate 10A will flow through the second recesses 12.

[0046] The first recess 11 includes a first bottom wall portion 111, the first bottom wall portion 111 has a first thickness δ1, the first bottom wall portion 111 has a first recessed bottom wall surface 1111 facing the first side E1, and the first recess 11 has a first recessed depth Dp1. The first recessed depth Dp1 refers to the distance between the opening end of the first recess 11 and the first recessed bottom wall surface 1111 of the first recess 11 in the thickness direction of the first heat exchange plate 10A, as shown in FIG. Figure 8 Indicated in the middle.

[0047] The second recess 12 includes a second bottom wall portion 121, the second bottom wall portion 121 has a second thickness δ2, the second bottom wall portion 121 has a second recessed bottom wall surface 1211 facing the second side E2, and the second recess 12 has a second recessed depth Dp2. The second recessed depth Dp2 refers to the distance between the opening end of the second recess 12 and the second recessed bottom wall surface 1211 of the second recess 12 in the thickness direction of the first heat exchange plate 10A, as shown in FIG. Figure 8 Indicated in the middle.

[0048] In this embodiment, the first thickness δ1 of the first bottom wall portion 111 is set smaller than the second thickness δ2 of the second bottom wall portion 121, and the first recess depth Dp1 of the first recess 11 is set larger than the second recess depth Dp2 of the second recess 12. After such setting, the structure of the first heat exchange plate 10A on the first side E1 and the structure of the second side E2 are asymmetrical. During manufacturing, when the first recess 11 and the second recess 12 are formed by stamping, the heights of the convex points corresponding to the upper mold core and the lower mold core are different. Specifically, the stamping depth of the second recess 12 is shallow, and the corresponding thickness of the second bottom wall portion 121 is large. The structural strength of the second recess 12 is high. When the pressure drop on both sides of the first heat exchange plate 10A is set, the upper limit of the pressure drop that the second recess 12 can withstand can be increased. In other words, the aforementioned asymmetric structural design of the first heat exchange plate 10A is conducive to improving the forming quality.

[0049] In practical applications, the fluid flowing through the first side E1 of the first heat exchange plate 10A can be a cooling medium for heat exchange with external equipment, such as water or other coolant, and the fluid flowing through the second side E2 of the first heat exchange plate 10A can be a refrigerant. In this way, the cooling medium flows between the first recesses 11 of the first side E1. Since the first recess depth Dp1 of the first recess 11 is set relatively large, and the first thickness δ1 of the first bottom wall portion 111 of the first recess 11 is set relatively small, the corresponding flow resistance is small, and the pump power consumption of the system is low. The refrigerant flows between the second recesses 12 of the second side E2. Since the second recess depth Dp2 of the second recess 12 is set relatively small, and the second thickness δ2 of the second bottom wall portion 121 of the second recess 12 is set relatively large, the corresponding flow channel has a small content volume, high structural strength, high flow pressure drop, and a corresponding enhanced heat exchange effect is good. In summary, the thermal performance of the heat exchanger can be improved.

[0050] The first parameter is defined as the sum of the first recess depth Dp1 and the first thickness δ1, and the second parameter is defined as the sum of the second recess depth Dp2 and the second thickness δ2. When specifically set, the absolute value of the difference between the first parameter and the second parameter is not greater than 0.05 mm, that is, |(Dp1+δ1)-(Dp2+δ2)|≤0.05 mm. In this way, there is no need to separately constrain the thickness of the first bottom wall portion 111 or the second bottom wall portion 121, which is conducive to reducing manufacturing complexity.

[0051] In this embodiment, the first recess 11 forms a first convex portion 13 on the second side of the first heat exchange plate 10A, that is, the first convex portion 13 is located on the second side E2 of the first heat exchange plate 10A and is on the same side as the second recess 12. Figure 6 understand.

[0052] When configured, at least three first protrusions 13 are distributed on the circumference of a second recess 12 . In other words, at least three first protrusions 13 are arranged around a second recess 12 . In the illustrated example, four first protrusions 13 are distributed on the circumference of a second recess 12 .

[0053] The first convex portion 13 has a first convex top wall surface 131 . It can be understood that the first convex top wall surface 131 and the first concave bottom wall surface 1111 are two opposite wall surfaces of the first bottom wall portion 111 . The convex top wall portion of the first convex portion 13 is actually the first bottom wall portion 111 of the first concave portion 11 .

[0054] In the circumferential direction of a second recess 12, the first convex top wall surfaces 131 of two adjacent first convex portions 13 are connected by a first transition curved portion 151. The first transition curved portion 151 is recessed in the direction of the first side E1. The lowest point of the recess of the first transition curved portion 151 is close to the first convex top wall surface 131 of the first convex portion 13 relative to the second bottom wall portion 121. It can be understood that the first transition curved portion 151 includes a partial circumferential wall portion of two connected first convex portions 13.

[0055] After the above arrangement, on the second side E2 of the first heat exchange plate 10A, the second concave bottom wall 1211 of the second concave portion 12 is taken as the lowest point, the first convex top wall 131 of the first convex portion 13 is taken as the highest point, and the lowest point of the depression of the first transition curved portion 151 is located between the second concave bottom wall 1211 and the first convex top wall 131. In this way, when the fluid flows on the second side E2 of the first heat exchange plate 10A in the heat exchanger, due to the presence of the first transition curved portion 151, the fluid can flow between the second concave portions 12, and flow between two adjacent second concave portions 12 in a gradually expanding and contracting manner.

[0056] Similarly, the second recess 12 forms a second protrusion 14 on the first side E1 of the first heat exchange plate 10A. That is, the second protrusion 14 is located on the first side E1 of the first heat exchange plate 10A. Figure 3 and Figure 4 understand.

[0057] When configured, at least three second protrusions 14 are distributed on the circumference of a first recess 11 . In other words, at least three second protrusions 14 are arranged around a first recess 11 . In the illustrated example, four second protrusions 14 are distributed on the circumference of a first recess 11 .

[0058] The second convex portion 14 has a second convex top wall surface 141 . It can be understood that the second convex top wall surface 141 and the second concave bottom wall surface 1211 are two opposite wall surfaces of the first bottom wall portion 111 , and the convex top wall portion of the second convex portion 14 is actually the second bottom wall portion 121 of the second concave portion 12 .

[0059] In the circumferential direction of a first recess 11, the second convex top wall surfaces 141 of two adjacent second protrusions 14 are connected by a second transition curved surface portion 152. The second transition curved surface portion 152 is recessed in the direction of the second side E2. The lowest point of the recess of the second transition curved surface portion 152 is close to the second convex top wall surface 141 of the second protrusion 14 relative to the first bottom wall portion 111. It can be understood that the second transition curved surface portion 152 includes a partial circumferential wall portion of two connected second protrusions 14.

[0060] After the above arrangement, on the first side E1 of the first heat exchange plate 10A, the first concave bottom wall surface 1111 of the first concave portion 11 is taken as the lowest point, the second convex top wall surface 141 of the second convex portion 14 is taken as the highest point, and the lowest point of the depression of the second transition curved surface portion 152 is located between the first concave bottom wall surface 1111 and the second convex top wall surface 141. In this way, when the fluid flows on the first side E1 of the first heat exchange plate 10A in the heat exchanger, due to the presence of the second transition curved surface portion 152, the fluid can flow between the first concave portions 11, and flow between two adjacent first concave portions 11 in a gradually expanding and contracting manner.

[0061] refer to Fig. 9 In the specific setting, in the thickness direction of the first heat exchange plate 10A, there is a first size H1 between the lowest point of the depression of the first transition curved portion 151 and the first convex top wall 131 of the first convex portion 13, and there is a second size H2 between the lowest point of the depression of the second transition curved portion 152 and the second convex top wall 141 of the second convex portion 14, and the second size H2 is greater than the first size H1. In this way, in actual applications, when the fluid flowing on the first side E1 of the first heat exchange plate 10A is a cooling medium (such as water) and the fluid flowing on the second side E2 is a refrigerant, the first size H1 on the refrigerant side is relatively small, the fluid flow area on the refrigerant side is smaller, the pressure drop of the fluid passing through is larger, the heat exchange is better, and the flow area on the cooling medium side is relatively larger, and the pressure drop is lower.

[0062] Refer to Figure 5 and Figure 6 , on the second side E2 of the first heat exchange plate 10A, at least three second recesses 12 are distributed on the circumference of a first convex portion 13. In the illustrated example, four second recesses 12 are distributed on the circumference of a first convex portion 13. On the circumference of the first convex portion 13, the second concave bottom wall surfaces 1211 of two adjacent second concave portions 12 are connected by a third transition curved portion 153. The third transition curved portion 153 protrudes toward the direction of the second side E2. The third transition curved portion 153 and the first transition curved portion 151 adjacent thereto have a first overlapping surface area. The lowest point of the depression of the first transition curved portion 151 and the highest point of the protrusion of the third transition curved portion 153 are located in the first overlapping surface area.

[0063] It should be pointed out here that, since at least three second recesses 12 are distributed in the circumferential direction of the first convex portion 13, and at least three first convex portions 13 are distributed in the circumferential direction of the second recess 12, a third transition curved portion 153 will inevitably overlap at least partially with a first transition curved portion 151, and the aforementioned first overlapping surface area refers to the at least partially overlapping area, and the aforementioned first transition curved portion 151 adjacent to the third transition curved portion 153 refers to the first transition curved portion 151 that will intersect or overlap with the third transition curved portion 153, rather than other first transition curved portions 151 that are closer but not crossed.

[0064] The above arrangement of the third transition curved surface portion 153 and the first transition curved surface portion 151 can ensure that the fluid can flow between the second recessed portions 12 .

[0065] Specifically, the first overlapped surface area of ​​the third transition curved surface portion 153 and the first transition curved surface portion 151 includes a first flat surface, and the lowest point of the depression of the first transition curved surface portion 151 and the highest point of the protrusion of the third transition curved surface portion 153 are both located on the first flat surface. The arrangement of the flat surface makes the flow of the fluid between the adjacent second recesses 12 relatively smooth, which is conducive to reducing the flow resistance.

[0066] More specifically, the lowest point of the depression of the first transition curved surface portion 151 coincides with the highest point of the protrusion of the third transition curved surface portion 153 , so that the concave and convex parts of the first heat exchange plate 10A on the second side E2 can be structurally symmetrical, which is beneficial for manufacturing.

[0067] Similarly, refer to Figure 3 and Figure 4 , on the first side E1 of the first heat exchange plate 10A, at least three first recesses 11 are distributed on the circumference of a second convex portion 14. In the illustrated example, four first recesses 11 are distributed on the circumference of a second convex portion 14. On the circumference of the second convex portion 14, the first concave bottom walls 1111 of two adjacent first concave portions 11 are connected by a fourth transition curved portion 154. The fourth transition curved portion 154 protrudes toward the direction of the first side E1. The fourth transition curved portion 154 and the second transition curved portion 152 adjacent thereto have a second overlapping surface area. The lowest point of the depression of the second transition curved portion 152 and the highest point of the protrusion of the fourth transition curved portion 154 are both located in the second overlapping surface area.

[0068] It should be pointed out here that, since at least three first recesses 11 are distributed in the circumferential direction of the second protrusion 14 and at least three second protrusions 14 are distributed in the circumferential direction of the first recess 11, a fourth transition curved surface portion 154 will inevitably at least partially overlap with a second transition curved surface portion 152. The aforementioned second overlapping surface area refers to the at least partially overlapping area. The aforementioned second transition curved surface portion 152 adjacent to the fourth transition curved surface portion 154 refers to the second transition curved surface portion 152 that will intersect or overlap with the fourth transition curved surface portion 154, rather than other second transition curved surface portions 152 that are closer but not intersecting.

[0069] The above arrangement of the fourth transition curved surface portion 154 and the second transition curved surface portion 152 can ensure that the fluid can flow between the first recessed portions 11 .

[0070] Specifically, the second overlapping surface area of ​​the fourth transition curved surface portion 154 and the second transition curved surface portion 152 includes a second flat surface, and the lowest point of the depression of the second transition curved surface portion 152 and the highest point of the protrusion of the fourth transition curved surface portion 154 are both located on the second flat surface. The setting of the flat surface makes the flow of the fluid between adjacent first recesses 11 relatively smooth, which is conducive to reducing flow resistance.

[0071] More specifically, the lowest point of the concave portion of the second transition curved surface portion 152 coincides with the highest point of the convex portion of the fourth transition curved surface portion 154 , so that the concave portion and the convex portion of the first heat exchange plate 10A on the first side E1 can be structurally symmetrical, which is beneficial for manufacturing.

[0072] After setting as above, combine Figure 4 and Figure 6 It is understood that the side wall surface of the second convex portion 14 surrounding the second convex top wall surface 141 includes a portion of the second transition curved surface portion 152 and a portion of the fourth transition curved surface portion 154, and the side wall surface of the first concave portion 11 surrounding the first concave bottom wall surface 1111 includes a portion of the second transition curved surface portion 152 and a portion of the fourth transition curved surface portion 154; the side wall surface of the first convex portion 13 surrounding the first convex top wall surface 131 includes a portion of the first transition curved surface portion 151 and a portion of the third transition curved surface portion 153, and the side wall surface of the second concave portion 12 surrounding the second concave bottom wall surface 1211 includes a portion of the first transition curved surface portion 151 and a portion of the third transition curved surface portion 153.

[0073] In this embodiment, on the first side E1 of the first heat exchange plate 10A, the first recess 11 and the second protrusion 14 are arranged alternately in the first direction, and the first recess 11 and the second recess 14 are also arranged alternately in the second direction. Correspondingly, on the second side E2 of the first heat exchange plate 10A, the first protrusion 13 and the second recess 12 are arranged alternately in the first direction, and the first protrusion 13 and the second recess 12 are also arranged alternately in the second direction. The first direction and the second direction are arranged at a set angle.

[0074] In the illustrated example, four second protrusions 14 are arranged in the circumferential direction of the first concave portion 11, and on the basis of four first concave portions 11 being arranged in the circumferential direction of the second protrusions 14, the first direction and the second direction are perpendicular to each other; specifically, in the illustrated example, the first direction is the length direction L of the first heat exchange plate 10A, and the second direction is the width direction W of the first heat exchange plate 10A; on this basis, Figure 3 In the DD direction shown, a plurality of first recesses 11 are arranged in sequence, and a plurality of second protrusions 14 are arranged in sequence. In a direction perpendicular to the DD direction, the arrangement of the first recesses 11 and the arrangement of the second protrusions 14 are arranged alternately.

[0075] In practical applications, the arrangement of the first recess 11 and the second protrusion 14 on the first side E1 of the first heat exchange plate 10A may be in other forms, and the second recess 12 and the first protrusion 13 are provided correspondingly, and are not limited to the arrangement shown in the figure.

[0076] Still taking the example in the figure, the distance between two adjacent first recesses 11 in the first direction, that is, the length direction L of the first heat exchange plate 10A is defined as a first distance S1, and the ratio of the first distance S1 to the first depression depth Dp1 of the first recess 11 is 2.5 to 9.0, and S1 / Dp1 may preferably be in the range of 2.8 to 4.8; the distance between two adjacent second protrusions 14 in the first direction is defined as a second distance S2, and the ratio of the second distance S2 to the second depression depth Dp2 is 2.5 to 9.0, and S2 / Dp2 may preferably be in the range of 2.8 to 4.8.

[0077] In this embodiment, the first concave bottom wall 1111 of the first concave portion 11 is a flat surface, and the second concave bottom wall 1211 of the second concave portion 12 is also a flat surface. In the specific setting, the area of ​​the first concave bottom wall 1111 is larger than the area of ​​the second concave bottom wall 1211. In this way, the concave structure on the first side E1 of the first heat exchange plate 10A and the concave structure on the second side E2 are asymmetrically designed. Combined with the design of the recessed depth of the concave structures on both sides and the thickness of the corresponding bottom wall, it is beneficial to improve the manufacturing convenience of stamping the sheet to form the first heat exchange plate 10A, and it is easy to ensure the manufacturing quality.

[0078] The first recess 11 further includes a first side wall surface 112 surrounding the first recess bottom wall surface 1111, and the connection between the first recess bottom wall surface 1111 and the first side wall surface 112 is a smooth transition curved surface. The second recess 12 further includes a second side wall surface 122 surrounding the second recess bottom wall surface 1211, and the connection between the second recess bottom wall surface 1211 and the second side wall surface 122 is also a smooth transition curved surface. In this way, when the fluid on the first side E1 flows between the first recesses 11, the flow resistance is small, and when the fluid on the second side E2 flows between the second recesses 12, the flow resistance is also small.

[0079] In this embodiment, the first heat exchange plate 10A may be an aluminum alloy plate, and a composite layer is provided on the surface of the first side E1 and / or the surface of the second side E2 thereof. The composite layer is generally solder for subsequent welding work.

[0080] Please refer to Figures 10 to 13, shows a schematic diagram of the structure of the second heat exchange plate 10B. The second heat exchange plate 10B is consistent with the first heat exchange plate 10A in terms of the setting of the concave-convex structure. The difference between the two is that the flange portion 103A of the first heat exchange plate 10A is bent toward the first side E1, while the flange portion 103B of the second heat exchange plate 10B is bent toward the second side E2, the second side E2 of the second heat exchange plate 10B has a second concave portion 12 concave toward the first side E1 and a first convex portion 13 convex toward the second side E2, the first side E1 of the second heat exchange plate 10B has a first concave portion 11 concave toward the second side E2 and a second convex portion 14 convex toward the first side E1, and the relevant parameter settings and arrangements of the first concave portion 11, the second concave portion 12, the first convex portion 13 and the second convex portion 14 are consistent with those of the first heat exchange plate 10A, and can be understood by referring to the above, and will not be repeated here.

[0081] Refer to Figure 1 and Figure 2 The heat exchanger provided in the embodiment of the present application includes the aforementioned first heat exchange plate 10A and the second heat exchange plate 10B, which are alternately stacked, and the first heat exchange plate 10A and the second heat exchange plate 10B are arranged back to back. Taking the example in the figure, the first side E1 of the first heat exchange plate 10A is back to the first side E1 of the second heat exchange plate 10B, and the second side E2 of the first heat exchange plate 10A and the second side E2 of the second heat exchange plate 10B are facing each other. It can be understood that in the concave-convex structure area of ​​the first heat exchange plate 10A and the second heat exchange plate 10B, the convex structure and the concave structure are mirror-symmetrical.

[0082] The adjacent first heat exchange plate 10A and the second heat exchange plate 10B are welded and fixed by two first convex top wall surfaces 131 at corresponding positions, or are welded and fixed by two second convex top wall surfaces 141 at corresponding positions.

[0083] In the specific setting, the first convex top walls 131 of the heat exchange plate 10 (including the first heat exchange plate 10A and the second heat exchange plate 10B) are in the same plane, and the second convex top walls 141 of the heat exchange plate 10 are in the same plane, which is conducive to fixation during subsequent manufacturing of the heat exchanger.

[0084] Taking the illustrated example, in the heat exchanger, a first fluid channel 104A is formed between the first side E1 of the first heat exchange plate 10A and the first side E1 of the second heat exchange plate 10B, and a second fluid channel 104B is formed between the second side E2 of the first heat exchange plate 10A and the second side E2 of the second heat exchange plate 10B. After the structure of the heat exchange plate 10 is arranged as before, the first fluid channel 104A includes a first recess 11, and the second fluid channel 104B includes a second recess 12. The first recess depth Dp1 of the first recess 11 is greater than the second recess depth Dp2 of the second recess 12, and the first bottom wall of the first recess 11 is The first thickness δ1 of the portion 111 is smaller than the second thickness δ2 of the second bottom wall portion 121 of the second recess 12. Therefore, the flow channel content volume corresponding to the first fluid channel 104A is relatively large, and the corresponding flow resistance is relatively small. The flow channel content volume corresponding to the second fluid channel 104B is relatively small, and the structural strength is high, and the flow pressure drop is high. In this way, in practical applications, the fluid flowing in the first fluid channel 104A can be a cooling medium, such as water, and the fluid flowing in the second fluid channel 104B can be a refrigerant. In this way, the heat exchange effect of the refrigerant can be enhanced, and the pump power consumption of the system can be reduced, so that the overall heat exchange performance of the product can be improved.

[0085] The heat exchanger and heat exchange plates provided by the present application are described in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. Heat exchange plate, characterized in that: The heat exchange plate has a first side and a second side opposite to each other; the heat exchange plate includes a plurality of first recesses and a plurality of second recesses, the first recesses are recessed toward the direction where the second side is located, and the second recesses are recessed toward the direction where the first side is located; The first recess has a first recess depth, the first recess includes a first bottom wall portion, and the first bottom wall portion has a first thickness; the second recess has a second recess depth, the second recess includes a second bottom wall portion, and the second bottom wall portion has a second thickness; the first recess depth is greater than the second recess depth, and the first thickness is less than the second thickness.

2. The heat exchange plate according to claim 1, characterized in that: A first parameter is defined as the sum of the first recess depth and the first thickness, and a second parameter is defined as the sum of the second recess depth and the second thickness. The absolute value of the difference between the first parameter and the second parameter is not greater than 0.05 mm.

3. The heat exchange plate according to claim 1, characterized in that: The first concave portion forms a first convex portion on the second side of the heat exchange plate, at least three first convex portions are distributed in the circumferential direction of one second concave portion, and in the circumferential direction of the second concave portion, the convex top wall surfaces of two adjacent first convex portions are connected by a first transition curved portion portion, the first transition curved portion portion is concave toward the direction of the first side, and the lowest point of the concave first transition curved portion portion is close to the convex top wall surface of the first convex portion relative to the second bottom wall portion; The second concave portion forms a second convex portion on the first side of the heat exchange plate, and at least three second convex portions are distributed in the circumferential direction of one of the first concave portions. In the circumferential direction of the first concave portion, the convex top wall surfaces of two adjacent second convex portions are connected by a second transition curved portion portion, and the second transition curved portion portion is concave in the direction of the second side, and the lowest point of the concave second transition curved portion portion is close to the convex top wall surface of the second convex portion relative to the first bottom wall portion; In the thickness direction of the heat exchange plate, there is a first size between the lowest point of the depression of the first transition curved surface portion and the convex top wall of the first convex portion, and there is a second size between the lowest point of the depression of the second transition curved surface portion and the convex top wall of the second convex portion, and the second size is greater than the first size.

4. The heat exchange plate according to claim 3, characterized in that: At least three second concave portions are distributed in the circumferential direction of one first convex portion. In the circumferential direction of the first convex portion, the concave bottom wall surfaces of two adjacent second concave portions are connected by a third transition curved portion, the third transition curved portion protrudes toward the direction where the second side is located, and the third transition curved portion and the first transition curved portion adjacent thereto have a first overlapping surface area; the lowest point of the depression of the first transition curved portion and the highest point of the protrusion of the third transition curved portion are both located in the first overlapping surface area; At least three first recesses are distributed on the circumference of a second convex portion. On the circumference of the second convex portion, the concave bottom walls of two adjacent first recesses are connected by a fourth transition curved surface portion. The fourth transition curved surface portion protrudes toward the direction of the first side. The fourth transition curved surface portion and the second transition curved surface portion adjacent to it have a second overlapping surface area. The lowest point of the depression of the second transition curved surface portion and the highest point of the protrusion of the fourth transition curved surface portion are both located in the second overlapping surface area.

5. The heat exchange plate according to claim 4, characterized in that: The first overlapping surface area includes a first flat surface, and the lowest point of the depression of the first transition curved surface portion and the highest point of the protrusion of the third transition curved surface portion are both located on the first flat surface; the second overlapping surface area includes a second flat surface, and the lowest point of the depression of the second transition curved surface portion and the highest point of the protrusion of the fourth transition curved surface portion are both located on the second flat surface.

6. The heat exchange plate according to claim 1, characterized in that: The second concave portion forms the second convex portion on the first side of the heat exchange plate; In a first direction, the first concave portions and the second convex portions are arranged alternately, and in a second direction, the first concave portions and the second convex portions are also arranged alternately, and the first direction and the second direction form a set angle.

7. The heat exchange plate according to claim 6, characterized in that: The first direction is the length direction of the heat exchange plate, and the second direction is the width direction of the heat exchange plate.

8. The heat exchange plate according to claim 6, characterized in that: A distance between two adjacent first recesses in the first direction is defined as a first distance, and a ratio of the first distance to the first recess depth is 2.5 to 9.0; A distance between two adjacent second protrusions in the first direction is defined as a second distance, and a ratio of the second distance to the second recess depth is 2.5 to 9.

0.

9. The heat exchange plate according to claim 8, characterized in that: A ratio of the first distance to the first recess depth is 2.8 to 4.8, and / or a ratio of the second distance to the second recess depth is 2.8 to 4.

8.

10. The heat exchange plate according to any one of claims 1 to 9, characterized in that: The first bottom wall portion has a first concave bottom wall surface facing the first side, the first concave bottom wall surface is a flat surface, the second bottom wall portion has a second concave bottom wall surface facing the second side, the second concave bottom wall surface is a flat surface, and the area of ​​the first concave bottom wall surface is greater than the area of ​​the second concave bottom wall surface.

11. The heat exchange plate according to claim 10, characterized in that: The first recess further includes a first side wall surface surrounding the first recess bottom wall surface, and the connection between the first recess bottom wall surface and the first side wall surface is a smooth transition curved surface; the second recess further includes a second side wall surface surrounding the second recess bottom wall surface, and the connection between the second recess bottom wall surface and the second side wall surface is a smooth transition curved surface.

12. The heat exchange plate according to any one of claims 1 to 9, characterized in that: The heat exchange plate is an aluminum alloy plate, and a composite layer is provided on the surface of the heat exchange plate located on the first side and / or the surface of the heat exchange plate located on the second side.

13. A heat exchanger, characterized in that comprising at least two of the heat exchange plates arranged in a stacked manner, wherein the heat exchange plates are the heat exchange plates according to any one of claims 1 to 12; The first concave portion forms a first convex portion on the second side of the heat exchange plate, and the second concave portion forms a second convex portion on the first side of the heat exchange plate; Two adjacent heat exchange plates are arranged back to back, and are fixed by welding through the first protrusions facing each other, or are fixed by welding through the second protrusions facing each other.

14. The heat exchanger according to claim 13, characterized in that A first fluid channel is formed between the first side of one of the heat exchange plates and the first side of another adjacent heat exchange plate, and the first fluid channel is used for the flow of cooling medium. A second fluid channel is formed between the second side of one of the heat exchange plates and the second side of another adjacent heat exchange plate, and the second fluid channel is used for the flow of refrigerant.

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