Heat exchanger

Abstract

The heat exchanger comprises a first plate piece and a second plate piece, a first inter-plate channel is formed between the first plate piece and the second plate piece, the first plate piece comprises a first convex part, the first convex part protrudes away from the side of the first inter-plate channel, the second plate piece comprises a first concave part, and the first concave part sinks away from the side of the first inter-plate channel. The wall forming the first inter-plate channel comprises the wall of the first convex part and the wall of the first concave part, so that the heat exchange performance of the heat exchanger is improved.

Description

Technical Field

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

[0002] The heat exchanger includes a plurality of plates, which are stacked and arranged. The plate and one of the adjacent plates form a first inter-plate channel for a first fluid to flow, and the plate and another adjacent plate form a second inter-plate channel for a second fluid to flow, and the first fluid and the second fluid exchange heat. One of the plates forming the first inter-plate channel is provided with a plurality of convex portions, and the wall forming the first inter-plate channel includes the wall of the convex portion and the plate surface of another plate forming the first inter-plate channel. The flow space of the first inter-plate channel is small, and the pressure drop of the first fluid is large, which may affect the heat exchange performance of the heat exchanger. Summary of the invention

[0003] The purpose of the present application is to provide a heat exchanger which is beneficial to improving the heat exchange performance of the heat exchanger.

[0004] To achieve the above purpose, an implementation of the present application adopts the following technical solution:

[0005] A heat exchanger comprises a first plate and a second plate, wherein a first inter-plate channel is provided between the first plate and the second plate, wherein the first plate comprises a first substrate and a first convex portion, wherein the first convex portion is protruding relative to the first substrate and the first convex portion is protruding away from the first inter-plate channel side, and wherein the second plate comprises a second substrate and a first concave portion, wherein the first concave portion is concave relative to the second substrate and away from the first inter-plate channel side, and within the same first inter-plate channel, a protruding direction of the first convex portion and a concave direction of the first concave portion are opposite, and the first convex portion and the second substrate are fixedly connected, and a wall forming the first inter-plate channel comprises a wall of the first convex portion and a wall of the first concave portion.

[0006] In one embodiment provided in the present application, a heat exchanger includes a first plate and a second plate, a first inter-plate channel is provided between the first plate and the second plate, the first plate includes a first convex portion, the first convex portion is convex away from the first inter-plate channel side, the second plate includes a first concave portion, the first concave portion is concave away from the first inter-plate channel side, and the wall forming the first inter-plate channel includes the wall of the first convex portion and the wall of the first concave portion; the first inter-plate channel is for fluid flow, and the provision of the first concave portion increases the space of the first inter-plate channel, which is beneficial to reducing the pressure drop of the fluid and improving the heat exchange performance of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a three-dimensional structural schematic diagram of a first embodiment of the heat exchanger provided by the present application from one viewing angle;

[0008] Figure 2Yes Figure 1 A perspective three-dimensional structural schematic diagram of a partial structure of the heat exchanger in

[0009] Figure 3 Yes Figure 2 A perspective three-dimensional structural schematic diagram of the first plate in

[0010] Figure 4 Yes Figure 3 An enlarged structural schematic diagram of part A (rotated by a certain angle) in

[0011] Figure 5 Yes Figure 2 A perspective three-dimensional structural schematic diagram of the second plate in

[0012] Figure 6 Yes Figure 5 An enlarged structural schematic diagram of part B in

[0013] Figure 7 Yes Figure 3 A perspective three-dimensional structural schematic diagram of a partial structure of the cooperation between the first plate and the second plate in

[0014] Figure 8 Yes Figure 7 Another perspective three-dimensional structural schematic diagram of a partial structure of the cooperation between the first plate and the second plate in

[0015] Figure 9 A perspective three-dimensional structural schematic diagram of the second plate in the second embodiment of the heat exchanger

[0016] Figure 10 Yes Figure 9 An enlarged structural schematic diagram of part B in

[0017] Figure 11 A perspective three-dimensional structural schematic diagram of a partial structure of the cooperation between the first plate and the second plate in the second embodiment of the heat exchanger

[0018] Figure 12 Yes Figure 11 Another perspective three-dimensional structural schematic diagram of a partial structure of the cooperation between the first plate and the second plate in Detailed implementation manners

[0019] The present application will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0020] In combination with Figures 1 - 8, showing the first embodiment of the heat exchanger 100. The heat exchanger 100 includes a plurality of heat exchange plates 4, which are stacked. The heat exchanger 100 includes a first inter-plate channel S1 and a second inter-plate channel S2, and the second inter-plate channel S2 is not connected to the first inter-plate channel S1. The first inter-plate channel S1 is for the first fluid to flow. In this embodiment, the first fluid refers to the coolant, and the coolant is mainly a heat transfer medium, such as cooling water or cooling oil. The second inter-plate channel S2 is for the second fluid to flow. In this embodiment, the second fluid refers to the refrigerant, and the refrigerant is mainly a refrigerant, such as R134a, R1234yf, etc. Heat exchange occurs between the first fluid and the second fluid. In other embodiments, both the first fluid and the second fluid can also be coolants. In this embodiment, along the height direction of the heat exchanger 100, the first inter-plate channel S1 and the second inter-plate channel S2 are alternately arranged, so that the heat exchange area between the first fluid and the second fluid is large, and the heat exchange effect of the heat exchanger 100 is good. In other embodiments, two layers of the first inter-plate channels S1 can be continuously arranged, and one layer of the second inter-plate channel S2 can be arranged; or, two layers of the second inter-plate channels S2 can be continuously arranged, and one layer of the first inter-plate channel S1 can be arranged, so that the heat exchange between the first fluid and the second fluid can also be realized. For the convenience of description, the directions up and down are defined as the up and down directions in the attached Figure 1 drawings of the specification, and up and down only represent relative positions; the height direction of the heat exchanger 100 is defined as the height direction in the attached Figure 1 drawings of the specification. In this application, the height direction of the heat exchanger 100 is consistent with the stacking direction of the heat exchange plates 4.

[0021] Combined with Figures 3 - 8The heat exchanger 100 includes a first plate 1 and a second plate 2, wherein a first inter-plate channel S1 is provided between the first plate 1 and the second plate 2, wherein the first plate 1 includes a first substrate 11 and a first convex portion 12, wherein the first convex portion 12 is convex relative to the first substrate 11, and the first convex portion 12 is convex away from the first inter-plate channel S1. In the present application, the first convex portion 12 is convex upward. The second plate 2 includes a second substrate 21 and a first concave portion 23, wherein the first concave portion 23 is concave relative to the second substrate 21, and the first concave portion 23 is concave away from the first inter-plate channel S1. In the present application, the first concave portion 23 is concave downward, i.e., in the same first inter-plate channel S1, the convex direction of the first convex portion 12 is opposite to the concave direction of the first concave portion 23. The wall forming the first inter-plate channel S1 includes the wall of the first convex portion 12 and the wall of the first concave portion 23. The first inter-plate channel S1 is for the flow of coolant. The provision of the first concave portion 23 increases the space of the first inter-plate channel S1, which is conducive to reducing the pressure drop of the coolant, increasing the heat exchange between the coolant and the refrigerant, and improving the heat exchange performance of the heat exchanger 100. In the present application, the first plate 1 and the second plate 2 are collectively referred to as the heat exchange plate 4. In other embodiments, the first inter-plate channel S1 can also be for the flow of refrigerant, and the second inter-plate channel S2 can be for the flow of coolant, thereby reducing the flow pressure drop of the refrigerant and providing a heat exchange effect. In the present application, the first substrate 11 refers to the unprocessed flat portion of the first plate 1, and the second substrate 21 refers to the unprocessed flat portion of the second plate 2.

[0022] Of course, in other embodiments, the heat exchange area 41 of the first plate 1 may also be recessed downward relative to the first substrate 11 as a whole, and the first convex portion 12 is provided in the heat exchange area 41, that is, the first plate 1 is firstly stamped to form the heat exchange area 41, and then the first convex portion 12 is stamped out on the heat exchange area 41.

[0023] Combination Figures 7 - 8 In this embodiment, the heat exchanger 100 includes a plurality of first plates 1 and a plurality of second plates 2, the first plates 1 and the second plates 2 are alternately stacked in sequence, a first inter-plate channel S1 is provided between the first plate 1 and an adjacent second plate 2, and a second inter-plate channel S2 is provided between the first plate 1 and another adjacent second plate 2, and two fluids flow in the heat exchanger 100 and perform heat exchange.

[0024] Combination Figure 3 and Figure 5 The heat exchange plate 4 includes a heat exchange area 41, a first corner hole area 42 and a second corner hole area 43. Along the extension direction of the heat exchange plate 4, the first corner hole area 42 and the second corner hole area 43 are located at both ends of the heat exchange plate 4, and the heat exchange area 41 is located between the first corner hole area 42 and the second corner hole area 43. In this embodiment, the first convex portion 12 is located in the heat exchange area 41, and the first concave portion 23 is also located in the heat exchange area 41. In other embodiments, the first convex portion 12 and the first concave portion 23 can also be extended to the first corner hole area 42 or the second corner hole area 43.

[0025] Combined with Figures 5 - 8 , in this embodiment, the second plate 2 includes a second convex portion 22 which protrudes relative to the second substrate 21. The second convex portion 22 protrudes away from the side of the second inter-plate channel S2. In this embodiment, the second convex portion 22 protrudes upward. The second convex portion 22 is fixedly connected to the first substrate 11. The wall forming the second inter-plate channel S2 includes the wall of the second convex portion 22 and the wall of the first substrate 11. The first substrate 11 includes a first plate surface 111 and a second plate surface 112 which face away from each other. The first convex portion 12 is located on the first plate surface 111. The first convex portion 12 is fixedly connected to the second substrate 21 by welding. The wall forming the first inter-plate channel S1 includes the wall of the first convex portion 12 and the wall of the second substrate 21. The wall forming the first inter-plate channel S1 also includes the wall of the first convex portion 12 and the wall of the first concave portion 23. Of course, in other embodiments, the heat exchange area 41 of the second plate 2 may also be recessed downward as a whole relative to the second substrate 21, and the second convex portion 22 and the first concave portion 23 are provided in the heat exchange area 41.

[0026] In this embodiment, the structures of the first convex portion 12 and the second convex portion 22 are similar. For example, the projection of the first convex portion 12 on the first plate surface 111 is oval, and the projection of the second convex portion 22 on the first plate surface 111 is circular or oval.

[0027] Combined with Figure 3 and Figure 4 , define the longitudinal direction L. The first fluid and the second fluid flow from one end of the heat exchanger 100 to the other end. The longitudinal direction L is consistent with the main flow direction of the first fluid and the second fluid. In this embodiment, the longitudinal direction L refers to the length direction of the heat exchange plate 4. Define the first direction F1 and the second direction F2. The first direction F1 and the second direction F2 are arranged at an angle. The first direction F1 is perpendicular to the height direction of the heat exchanger 100, and the second direction F2 is perpendicular to the height direction of the heat exchanger 100. The first direction F1 and the second direction F2 are symmetrically arranged relative to the longitudinal direction L. The first direction F1 forms an angle α with the longitudinal direction L, and the second direction F2 forms an angle -α with the longitudinal direction L. The first convex portions 12 are arranged in an array along the first direction F1 and the second direction F2. The first direction F1 and the second direction F2 are not vector directions. α and -α are used to conveniently illustrate the symmetrical arrangement of the first direction F1 and the second direction F2 relative to the longitudinal direction L. In this embodiment, α is 40° to 70°, including 40° and 70°. In this way, the first convex portions 12 can be arranged more densely, which is beneficial to increasing the heat exchange area between the refrigerant and the coolant. Of course, in other embodiments, the first convex portions 12 may also be arranged in a scattered manner.

[0028] Combined with Figure 3 and Figure 4, in this embodiment, the width of the first convex portion 12 in the longitudinal direction L is smaller than the width of the first convex portion 12 in the direction perpendicular to the longitudinal direction L, that is, the dimension of the first convex portion 12 in the direction perpendicular to the main flow direction is larger. The refrigerant flows in the second inter-plate channel S2, which is beneficial to the generation of eddy currents and can increase the heat exchange effect between the refrigerant and the coolant. Of course, in other embodiments, the width of the first convex portion 12 in the longitudinal direction L may also be equal to or smaller than the width of the first convex portion 12 in the direction perpendicular to the longitudinal direction L.

[0029] Combined with Figure 3 , Figure 5 and Figures 7 - 8 , the second substrate 21 includes a third plate surface 211 and a fourth plate surface 212, the third plate surface 211 and the fourth plate surface 212 are arranged opposite to each other, the first plate surface 111 and the fourth plate surface 212 are arranged opposite to each other, and the second plate surface 112 and the third plate surface 211 are arranged opposite to each other. The second convex portion 22 protrudes upward relative to the third plate surface 211, the second convex portion 22 protrudes toward the side away from the second inter-plate channel S2, the first concave portion 23 depresses downward relative to the third plate surface 211, and the first concave portion 23 depresses toward the side away from the first inter-plate channel S1. In this embodiment, the second convex portions 22 and the first concave portions 23 are alternately arranged in an array in the first direction F1, and the second convex portions 22 and the first concave portions 23 are alternately arranged in an array in the second direction F2. The second convex portion 22 is fixedly welded to the second plate surface 112 of the first plate 1, and a part of the first inter-plate channel S1 is formed between the wall of the first convex portion 12 and the second plate surface 112. A part of the first inter-plate channel S1 is formed between the wall of the first concave portion 23 and the wall of the first convex portion 12. The setting of the first concave portion 23 increases the flow space of the coolant, which is beneficial to reducing the pressure drop of the coolant and improving the heat exchange effect between the coolant and the refrigerant.

[0030] Combined with Figures 3 - 4 , in this embodiment, the first convex portion 12 includes a second concave portion 121, and the second concave portion 121 depresses toward the side of the first inter-plate channel S1. The first convex portion 12 includes a first top portion 122, the second concave portion 121 includes a first bottom portion 1211, and the first bottom portion 1211 is closer to the first substrate 11 relative to the first top portion 122. In this embodiment, the first convex portion 12 has two first top portions 122, the second concave portion 121 is located between the two first top portions 122, the second concave portion 121 extends in the longitudinal direction L, and both ends of the second concave portion 121 are open. In other embodiments, the first top portion 122 may also have multiple, and the second concave portion 121 is located between two adjacent first top portions 122, that is, two or more second concave portions 121 may also be provided.

[0031] Combined with Figures 7 - 8, in this embodiment, the second recess 121 and the first recess 23 are fixedly welded. The first recess 23 includes a second top 231 and two first side walls 232. The second top 231 is located between the two first side walls 232 and connects the two first side walls 232. The second recess 121 includes a first bottom 1211 and two second side walls 1212. The first bottom 1211 is located between the two second side walls 1212 and connects the two second side walls 1212. The second top 231 and the first bottom 1211 are fixedly welded, and the first side wall 232 and the second side wall 1212 are fixedly welded to prevent the refrigerant from flowing through the second recess 121.

[0032] In other embodiments, the second top 231 and the first bottom 1211 can also be fixedly welded, and the first side wall 232 and the second side wall 1212 are in clearance fit. The clearance between the first side wall 232 and the second side wall 1212 is set to be relatively small, and it is difficult for the refrigerant to flow through the clearance between the first side wall 232 and the second side wall 1212. Of course, in other embodiments, a flow channel (not shown in the figure) can also be formed in the clearance between the first side wall 232 and the second side wall 1212, and the refrigerant can flow through the clearance between the first side wall 232 and the second side wall 1212. The provision of the first protrusion 12 is conducive to the generation of vortices. Vortices are formed on both sides of the first protrusion 12. When the size of the vortices is relatively large, a flow dead zone is likely to be formed near the first protrusion 12. The provision of the flow channel allows the refrigerant to flow through, which is beneficial to improving the flow field near the vortices and enhancing the heat exchange effect of the heat exchanger 100.

[0033] Of course, in other embodiments, the second recess 121 and the first recess 23 can also be in clearance fit. There is a clearance between the second top 231 and the first bottom 1211, and there is a clearance between the first side wall 232 and the second side wall 1212. There is a flow channel (not shown in the figure) between the second recess 121 and the first recess 23 for the refrigerant to flow through. Vortices are formed on both sides of the first protrusion 12. When the size of the vortices is relatively large, a flow dead zone is likely to be formed near the first protrusion 12. The provision of the flow channel allows the refrigerant to flow through, which is beneficial to improving the flow field near the vortices and enhancing the heat exchange effect of the heat exchanger 100.

[0034] In other embodiments, the two ends of the second recess 121 may not be open. In other embodiments, multiple first tops 122 can also be provided, and multiple second recesses 121 can also be provided. The second recesses 121 are located between two adjacent first tops 122.

[0035] Combined with Figure 4 、 Figure 7 And Figure 8, in this embodiment, the first convex portion 12 includes a first top portion 122, and the first top portion 122 is fixedly welded to the fourth plate surface 212 of the adjacent second plate 2. The second convex portion 22 includes a second top portion 231, and the second top portion 231 is fixedly welded to the second plate surface 112 of the adjacent first plate 1. In other embodiments, the first plate 1 and the second plate 2 can also be fixedly bonded.

[0036] In this embodiment, the first top portion 122 is planar, which is beneficial to increasing the welding area between the first convex portion 12 and the second plate 2 and improving the welding strength between the first plate 1 and the second plate 2. In this embodiment, the second top portion 231 of the second convex portion 22 is also planar, which is beneficial to increasing the welding area between the second convex portion 22 and the first plate 1 and improving the welding strength of the heat exchanger 100. Of course, in other embodiments, the first top portion 122 can also be curved, and the second top portion 231 can also be curved.

[0037] Combined with Figure 4 , Figure 7 and Figure 8 , in this embodiment, the first bottom portion 1211 of the second concave portion 121 is planar, which is convenient for the forming of the first plate 1. The second top portion 231 of the first concave portion 23 is planar, which is convenient for the forming of the first plate 1 and also convenient for the welding cooperation between the first concave portion 23 and the second concave portion 121. In other embodiments, the first bottom portion 1211 of the second concave portion 121 can also be curved, and the second top portion 231 of the first concave portion 23 can also be curved. The second concave portion 121 can be provided with one or more, and the number of the first concave portions 23 is set corresponding to that of the second concave portions 121.

[0038] Combined with Figures 3 - 4 , along the first direction F1 and the second direction F2, there is a first low position section 13 between adjacent first convex portions 12. In this embodiment, the first low position section 13 is connected to the first top portions 122 of two adjacent first convex portions 12. In this embodiment, the first low position section 13 is curved, which is convenient for the forming of the first plate 1. The first low position section 13 includes a second bottom portion 131, and the height of the first top portion 122 of the first convex portion 12 from the first plate surface 111 is greater than the height of the second bottom portion 131 from the first plate surface 111. The setting of the first low position section 13 is beneficial to increasing the heat exchange area of the first plate 1 and improving the heat exchange effect between the refrigerant and the coolant. In this embodiment, the end of the first low position section 13 is connected to the first top portion 122, and the height of the end of the first low position section 13 from the first plate surface 111 is the same as the height of the first top portion 122 from the first plate surface 111. In other embodiments, the first convex portion 12 includes a third side wall 123, and the end of the first low position section 13 can also be connected to the third side wall 123, and the height of the end of the first low position section 13 from the first plate surface 111 is less than the height of the first top portion 122 from the first plate surface 111.

[0039] Combined with Figures 5 - 6 , in this embodiment, along the first direction F1 and the second direction F2, there is a second low-level section 24 between adjacent second convex parts 22. The second convex part 22 includes a third top 221. The second low-level section 24 is connected to the third tops 221 of two adjacent second convex parts 22. In this embodiment, the second low-level section 24 is curved, which is convenient for the forming of the second plate 2. The second low-level section 24 includes a third bottom 241. The height of the second top 231 of the second convex part 22 from the third plate surface 211 is greater than the height of the third bottom 241 from the third plate surface 211. The setting of the second low-level section 24 is beneficial to increasing the heat exchange area of the second plate 2 and providing the heat exchange effect between the refrigerant and the coolant.

[0040] Combined with Figures 7 - 8 , in this embodiment, the end of the second low-level section 24 is connected to the second top 231, and the height of the end of the second low-level section 24 from the third plate surface 211 is the same as the height of the second top 231 from the third plate surface 211. In other embodiments, the end of the first low-level section 13 can also be connected to the side wall of the second convex part 22, and the height of the end of the second low-level section 24 from the third plate surface 211 can also be less than the height of the third top 221 from the third plate surface 211.

[0041] Combined with Figure 4 and Figure 6 and also Figures 7 - 8 , in this embodiment, the first convex part 12 includes a third side wall 123, and the third side wall 123 is curved. The wall of the second concave part 121 is also curved. The first inter-plate channel S1 includes a first sub-channel S11 and a second sub-channel S12, and the first sub-channel S11 and the second sub-channel S12 are connected. The wall forming the first sub-channel S11 includes the wall of the second concave part 121 and the wall of the first concave part 23; the wall forming the first sub-channel S11 includes the third side wall 123 and the wall of the second substrate 21, the wall forming the first sub-channel S11 includes the first top 122 and the wall of the second substrate 21, where the wall of the second substrate 21 refers to the third plate surface 211 of the second plate 2; the wall forming the second sub-channel S12 includes the wall of the first low-level section 13 and the wall of the second low-level section 24. The third side wall 123, the second concave part 121, the first low-level section 13, and the second low-level section 24 are curved, and the first inter-plate channel S1 is curved, which is beneficial to increasing the turbulence degree of the coolant and enhancing the heat exchange effect between the coolant and the refrigerant.

[0042] Combined with Figure 4 and Figure 6 and also Figures 7 - 8, the side wall of the second convex portion 22 is curved. The second inter-plate channel S2 includes a third sub-channel S21 and a fourth sub-channel S22, and the third sub-channel S21 and the fourth sub-channel S22 are connected. The wall forming the third sub-channel S21 includes the wall of the second convex portion 22 and the wall of the first substrate 11, where the wall of the first substrate 11 refers to the first plate surface 111. The wall forming the fourth sub-channel S22 includes the wall of the first low section 13 and the wall of the second low section 24. Along the stacking direction of the first plate 1 and the second plate 2, the maximum height of the third sub-channel S21 is greater than the maximum height of the fourth sub-channel S22. In this way, when the refrigerant flows from the third sub-channel S21 to the fourth sub-channel S22 and then from the fourth sub-channel S22 to the third sub-channel S21, the refrigerant experiences a gradual change in channel height from high to low and then from low to high. This is beneficial to enhancing the flow of the refrigerant and improving the heat exchange between the refrigerant and the coolant. In addition, the wall of the second convex portion 22, the first low section 13, and the second low section 24 are curved, and the second inter-plate channel S2 is also curved. This is beneficial to increasing the degree of turbulence of the refrigerant and enhancing the heat exchange effect between the refrigerant and the coolant.

[0043] Referring to Figure 4 , in this embodiment, there is a groove 14 between four adjacent first convex portions 12, and the groove 14 forms a part of the three sub-channels, that is, the groove 14 forms a part of the second inter-plate channel S2.

[0044] In other embodiments, the third side wall 123, or the wall of the second concave portion 121, or the wall of the second convex portion 22, or the first low section 13, or the second low section 24 may also be planar, and the planar shape includes an inclined plane. Of course, in other embodiments, the third side wall 123, or the wall of the second concave portion 121, or the wall of the second convex portion 22, or the first low section 13, or the second low section 24 may also be a combination of planar and curved shapes, and the shape of the third side wall 123 or the third side wall 123, or the wall of the second concave portion 121, or the wall of the second convex portion 22, or the first low section 13, or the second low section 24 is not limited.

[0045] In other embodiments, the first plate 1 may not have the first low section 13, and the second plate 2 may not have the second low section 24. Of course, in other embodiments, the first plate 1 may have the first low section 13 while the second plate 2 does not have the second low section 24, or the second plate 2 may have the second low section 24 while the first plate 1 does not have the first low section 13.

[0046] Referring to Figure 3, in this embodiment, along the extension direction of the heat exchange plate 4, the apex angle of the triangle formed by three adjacent first convex portions 12 is β, and β is the distribution angle of the first convex portions 12. In this embodiment, β is 80° to 140°, including 80° and 140°; β is equal to 2α, and the first convex portions 12 are arranged in an array along the directions forming an angle α and -α with the longitudinal direction L. The angles between the fourth sub-channel S22 and the fifth sub-channel and the main flow direction are also α values, so that the flow resistance of the refrigerant is small. In addition, since β is 80° to 140°, the first convex portions 12 can be arranged relatively densely. Along the extension direction of the second concave portion 121, the apex angle of the triangle formed by three adjacent second concave portions 121 is also β.

[0047] Combined with Figures 3 - 4 、 Figures 9 - 12 , a second embodiment of the heat exchanger 100100 is schematically shown. Compared with the first embodiment, in this embodiment, the second plate 2 does not have the second low position section 24, and the first convex portion 12 and the second convex portion 22 are different point wave structures.

[0048] Combined with Figures 11 - 12 , the first plate 1 includes a first substrate 11, the first substrate 11 includes a first plate surface 111 and a second plate surface 112, the second plate 2 includes a second substrate 21, the second substrate 21 includes a third plate surface 211 and a fourth plate surface 212, and the second plate surface 112 and the third plate surface 211 are arranged opposite to each other.

[0049] Combined with Figures 9 - 10 、 Figures 11 - 12 , the second plate 2 includes a second convex portion 22, the second convex portion 22 protrudes toward the second plate inter-channel S2 side, and the second convex portions 22 are arranged in an array along the first direction F1 and the second direction F2. There is a first concave portion 23 between adjacent second convex portions 22, and the first concave portion 23 is recessed downward relative to the second substrate 21. The second convex portion 22 includes a second top portion 231, and the second top portion 231 is welded and fixed to the second plate surface 112. In this embodiment, the second top portion 231 is planar, which is beneficial to increasing the welding area between the second plate 2 and the first plate 1 and improving the strength of the heat exchanger 100. Of course, in other embodiments, the second top portion 231 may also be curved. In other embodiments, the second convex portions 22 may not be arranged in an array along the first direction F1 and the second direction F2, and the second convex portions 22 may be arranged irregularly.

[0050] The second convex portion 22 faces the first substrate 11, the second convex portion 22 includes a first groove 222, the first groove 222 forms a part of the second plate inter-channel S2, and the existence of the first groove 222 is beneficial to strengthening the boiling heat transfer of the refrigerant and improving the heat exchange effect of the heat exchanger 100.

[0051] Combined with Figures 11 - 12, the first plate 1 includes a first convex portion 12. The first convex portion 12 includes a first top portion 122, and the first top portion 122 is fixedly welded to the fourth plate surface 212. In this embodiment, the first top portion 122 is planar, which is beneficial to increasing the welding area between the first plate 1 and the second plate 2 and improving the strength of the heat exchanger 100. In other embodiments, the second top portion 231 may also be curved.

[0052] Combined with Figure 4 and Figure 10 , in this embodiment, the projection of the first convex portion 12 on the first plate surface 111 is oval, and the projection of the second convex portion 22 on the first plate surface 111 is rhombic. The structures of the first convex portion 12 and the second convex portion 22 are quite different, which is beneficial to increasing the curvature of the first inter-plate channel S1 and the second inter-plate channel S2 and enhancing the heat exchange effect between the refrigerant and the coolant.

[0053] Combined with FIG. Figure 4 , 11 - Figure 12 , the first plate 1 includes a second concave portion 121, and the second concave portion 121 is fixedly welded to the first concave portion 23 to prevent the refrigerant from flowing through the second concave portion 121. In other embodiments, the second concave portion 121 and the first concave portion 23 may also be in clearance fit, and there is a clearance between the wall of the second concave portion 121 and the wall of the first concave portion 23, and the refrigerant can pass through the clearance between the wall of the second concave portion 121 and the wall of the first concave portion 23.

[0054] Combined with Figures 3 - 4 , Figures 11 - 12 , the first plate 1 includes a first low position section 13. Along the first direction F1 and the second direction F2, the first low position section 13 is between adjacent first convex portions 12. In this embodiment, the first low position section 13 is curved. In this embodiment, the first top portion 122 is planar, which is beneficial to increasing the welding area between the first plate 1 and the second plate 2 and improving the strength of the heat exchanger 100. Of course, in other embodiments, the first top portion 122 may also be curved. Of course, in other embodiments, the projection of the first convex portion 12 on the first plate surface 111 may also be circular or pentagonal, etc., and the projection of the second convex portion 22 on the first plate surface 111 may also be triangular or hexagonal, etc. The shapes of the first convex portion 12 and the second convex portion 22 are arbitrary.

[0055] Combined with Figure 3 , Figures 11 - 12, in this embodiment, the first convex portion 12 includes a third sidewall 123, the third sidewall 123 is curved, and the wall of the second concave portion 121 is also curved. The first inter-plate channel S1 includes a first sub-channel S11 and a second sub-channel S12, and the first sub-channel S11 and the second sub-channel S12 are connected. The wall forming the first sub-channel S11 includes the wall of the second concave portion 121 and the wall of the first concave portion 23, the wall forming the first sub-channel S11 includes the wall of the first top portion 122 and the wall of the second substrate 21, and the wall forming the first sub-channel S11 includes the third sidewall 123 and the wall of the second substrate 21. Here, the wall of the second substrate 21 refers to the third plate surface 211. The wall forming the second sub-channel S12 includes the wall of the first low-level section 13 and the wall of the second substrate 21. Here, the wall of the second substrate 21 also refers to the third plate surface 211. In this embodiment, the third sidewall 123, the second concave portion 121, and the first low-level section 13 are curved, so that the first inter-plate channel S1 is curved, which is beneficial to increasing the turbulence degree of the coolant and enhancing the heat exchange effect between the coolant and the refrigerant.

[0056] Combined with Figure 3 , Figures 11 - 12 , the second inter-plate channel S2 includes a third sub-channel S21 and a fourth sub-channel S22, and the third sub-channel S21 and the fourth sub-channel S22 are connected. The wall forming the third sub-channel S21 includes the wall of the second convex portion 22 and the wall of the first substrate 11. Here, the wall of the first substrate 11 refers to the first plate surface 111. The wall forming the fourth sub-channel S22 includes the wall of the first low-level section 13 and the wall of the second substrate 21. Here, the wall of the second substrate 21 refers to the fourth plate surface 212. Along the stacking direction of the first plate 1 and the second plate 2, the maximum height of the third sub-channel S21 is greater than the maximum height of the fourth sub-channel S22. In this way, when the refrigerant flows from the third sub-channel S21 to the fourth sub-channel S22 and then from the fourth sub-channel S22 to the third sub-channel S21, the refrigerant experiences a gradual change in channel height from high to low and then from low to high, which is beneficial to enhancing the flow of the refrigerant and improving the heat exchange between the refrigerant and the coolant. In this embodiment, the wall of the second convex portion 22 and the first low-level section 13 are curved, so that the second inter-plate channel S2 is curved, which is beneficial to increasing the turbulence degree of the refrigerant and enhancing the heat exchange effect between the refrigerant and the coolant. In this embodiment, there is a groove 14 between adjacent four first convex portions 12, and the groove 14 forms a part of the third sub-channel S21, that is, the groove 14 forms a part of the second inter-plate channel S2.

[0057] It should be noted that the above embodiments are only used to illustrate the present application and do not limit the technical solutions described in the present application. Although the present specification has described the present application in detail with reference to the above embodiments, those of ordinary skill in the art should understand that those skilled in the art can still modify the application or make equivalent substitutions, and all technical solutions and improvements that do not depart from the spirit and scope of the present application should be covered within the scope of the claims of the present application.

Claims

1. A heat exchanger (100) includes a first plate (1) and a second plate (2), and there is a first inter-plate channel (S1) between the first plate (1) and the second plate (2), characterized in that, The first plate (1) includes a first base plate (11) and a first convex portion (12). The first convex portion (12) protrudes relative to the first base plate (11), and the first convex portion (12) protrudes away from the side of the first inter-plate channel (S1). The second plate (2) includes a second base plate (21) and a first concave portion (23). The first concave portion (23) is recessed relative to the second base plate (21) away from the side of the first inter-plate channel (S1). Within the same first inter-plate channel (S1), the protruding direction of the first convex portion (12) and the recessed direction of the first concave portion (23) are opposite. The first convex portion (12) and the second base plate (21) are fixedly connected, and the wall forming the first inter-plate channel (S1) includes the wall of the first convex portion (12) and the wall of the first concave portion (23).

2. The heat exchanger (100) according to claim 1, characterized in that, The heat exchanger (100) includes a plurality of first plates (1) and a plurality of second plates (2). The first plates (1) and the second plates (2) are stacked. There is a first inter-plate channel (S1) between the first plate (1) and an adjacent second plate (2), and there is a second inter-plate channel (S2) between the first plate (1) and another adjacent second plate (2). The first inter-plate channel (S1) and the second inter-plate channel (S2) are not connected. The second plate (2) includes a second convex portion (22). The second convex portion (22) protrudes relative to the second base plate (21), and the second convex portion (22) protrudes away from the side of the second inter-plate channel (S2). The second convex portion (22) and the first base plate (11) are fixedly connected, and the wall forming the second inter-plate channel (S2) includes the wall of the second convex portion (22) and the wall of the first base plate (11).

3. The heat exchanger (100) according to claim 1 or 2, characterized in that, The first convex portion (12) includes a second concave portion (121). The second concave portion (121) is recessed toward the side of the first inter-plate channel (S1). The second concave portion (121) and the first concave portion (23) are fixedly connected. Alternatively, the second concave portion (121) and the first concave portion (23) are in clearance fit, and there is a flow passage between the second concave portion (121) and the first concave portion (23).

4. The heat exchanger (100) according to claim 3, wherein, The second concave portion (121) includes a first bottom (1211), and the first convex portion (12) includes a first top (122). The first bottom (1211) is closer to the first base plate (11) relative to the first top (122). The first top (122) and the second base plate (21) are fixed by welding. The first concave portion (23) includes a second top (231), and the second top (231) and the first bottom (1211) are fixed by welding. The first concave portion (23) includes a first side wall (232), and the second concave portion (121) includes a second side wall (1212). The first side wall (232) and the second side wall (1212) are fixed by welding or the first side wall (232) and the second side wall (1212) are in clearance fit.

5. The heat exchanger (100) according to claim 4, wherein, Define the longitudinal direction L. The width of the first convex portion (12) in the direction of the longitudinal direction L is smaller than the width of the first convex portion (12) in the direction perpendicular to the longitudinal direction L. The first convex portion (12) has two first tops (122), and the second concave portion (121) is located between the two first tops (122).

6. The heat exchanger (100) according to claim 5, characterized in that, Both the first plate (1) and the second plate (2) include a heat exchange area (41). The second convex portion (22) and the first concave portion (23) are both located in the heat exchange area (41) of the second plate (2), and the first convex portion (12) is located in the heat exchange area (41) of the first plate (1).

7. The heat exchanger (100) according to claim 2 or 6, characterized in that, There is a first low-level section (13) between adjacent first convex portions (12). The first low-level section (13) is curved. The first low-level section (13) includes a second bottom (131). The height of the first top (122) of the first convex portion (12) from the first substrate (11) is greater than the height of the second bottom (131) from the first substrate (11); and / or; There is a second low-level section (24) between adjacent second convex portions (22). The second low-level section (24) is curved. The second low-level section (24) includes a third bottom (241). The height of the second top (231) of the second convex portion (22) from the second substrate (21) is greater than the height of the third bottom (241) from the second substrate (21).

8. The heat exchanger (100) according to claim 7, characterized in that, The first inter-plate channel (S1) includes a first sub-channel (S11) and a second sub-channel (S12). The wall forming the first sub-channel (S11) includes the wall of the second concave portion (121) and the wall of the first concave portion (23). The wall forming the first sub-channel (S11) includes the first top (122) and the second substrate (21). The first convex portion (12) includes a third side wall (123). The wall forming the first sub-channel (S11) further includes the third side wall (123) and the second substrate (21). The wall forming the second sub-channel (S12) includes the wall of the first low-level section (13) and the second substrate (21). The first inter-plate channel (S1) is curved.

9. The heat exchanger (100) according to claim 7 or 8, characterized in that, The second inter-plate channel (S2) includes a third sub-channel (S21) and a fourth sub-channel (S22). The wall forming the third sub-channel (S21) includes the wall of the second convex portion (22) and the wall of the first substrate (11). The wall forming the fourth sub-channel (S22) includes the wall of the first low-level section (13) and the wall of the second substrate (21). Along the stacking direction of the first plate (1) and the second plate (2), the maximum height of the third sub-channel (S21) is greater than the maximum height of the fourth sub-channel (S22).

10. The heat exchanger (100) according to claim 7, characterized in that, The first inter-plate channel (S1) includes a first sub-channel (S11) and a second sub-channel (S12). The wall forming the first sub-channel (S11) includes the wall of the second recess (121) and the wall of the first recess (23). The first protrusion (12) includes a third sidewall (123). The wall forming the first sub-channel (S11) includes the third sidewall (123) and the wall of the second substrate (21). The wall forming the first sub-channel (S11) further includes the first top (122) and the wall of the second substrate (21). The wall forming the second sub-channel (S12) includes the wall of the first lower segment (13) and the wall of the second lower segment (24). The first inter-plate channel (S1) is curved.

11. The heat exchanger (100) according to claim 7 or 10, characterized in that, The second inter-plate channel (S2) includes a third sub-channel (S21) and a fourth sub-channel (S22). The wall forming the third sub-channel (S21) includes the wall of the second protrusion (22) and the wall of the first substrate (11). The wall forming the fourth sub-channel (S22) includes the wall of the first lower segment (13) and the wall of the second lower segment (24). Along the stacking direction of the first plate (1) and the second plate (2), the maximum height of the third sub-channel (S21) is greater than the maximum height of the fourth sub-channel (S22).

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