Heat exchanger

Abstract

The heat exchanger comprises a first plate sheet and a second plate sheet, a first inter-plate channel is formed between the first plate sheet and the second plate sheet, the first plate sheet comprises a plurality of first convex parts, at least part of the first convex parts comprise concave parts, the first tops of the first convex parts are fixedly connected with the second plate sheet, the first inter-plate channel comprises first sub-channels, and the first sub-channels comprise second sub-channels. The wall forming the first sub-channel comprises the wall of the concave part, so that the heat exchange effect of the heat exchanger is favorably improved.

Description

Technical Field

[0001] This application relates to the technical field of heat exchange, and particularly relates to a heat exchanger. Background Art

[0002] The heat exchanger includes multiple inter-plate channels, and each inter-plate channel is surrounded by at least two plates. Heat exchange occurs between two media in the inter-plate channels of the heat exchanger. Multiple convex parts are provided on the plates, and there is a gap between adjacent convex parts for the fluid flow path. The convex part of one plate is fixedly welded to the adjacent other plate. The fluid flows on both sides of the convex part and forms a vortex. When the size of the vortex is large, the wall of the convex part will hinder the flow of the vortex, and a flow dead zone may appear in the fluid near the welding of the convex part, affecting the heat exchange effect of the heat exchanger. Summary of the Invention

[0003] The purpose of this application is to provide a heat exchanger, which is beneficial to improving the heat exchange effect of the heat exchanger; this application also provides another heat exchanger, which is also beneficial to improving the heat exchange effect of the heat exchanger.

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

[0005] A heat exchanger includes a first plate and a second plate. There is a first inter-plate channel between the first plate and the second plate. The first plate includes multiple first convex parts, and the first convex parts protrude toward the first inter-plate channel side. At least part of the first convex parts include concave parts. The first convex parts include first tops, and the concave parts are recessed from the first tops away from the first inter-plate channel. The first tops are fixedly connected to the second plate, and the first inter-plate channel includes a first sub-channel. The wall forming the first sub-channel includes the wall of the concave part.

[0006] In an embodiment provided by this application, the heat exchanger includes a first plate and a second plate. There is a first inter-plate channel between the first plate and the second plate. The first plate includes multiple first convex parts. At least part of the first convex parts include concave parts. The first tops of the first convex parts are fixedly connected to the second plate. The first inter-plate channel includes a first sub-channel. The wall forming the first sub-channel includes the wall of the concave part. The setting of the first convex parts is conducive to the generation of vortices. When the size of the vortex is large, a flow dead zone is likely to form near the first convex parts. The setting of the first sub-channel allows the fluid to flow through, which is beneficial to improving the flow field near the vortex and improving the heat exchange effect of the heat exchanger.

[0007] The present application also provides another heat exchanger, which includes a third plate and a fourth plate. The third plate and the fourth plate are stacked, and there is a first inter-plate channel between the third plate and the fourth plate. The third plate includes a plurality of third convex portions that protrude toward the side of the first inter-plate channel, and the fourth plate includes a plurality of protruding portions that protrude away from the first inter-plate channel. The third convex portions are fixedly connected to the plate surface of the fourth plate. The first inter-plate channel includes a first sub-channel, and the walls forming the first sub-channel include the walls of the protruding portions and the walls of the third convex portions.

[0008] In an embodiment of another heat exchanger provided by the present application, the heat exchanger includes a third plate and a fourth plate. There is a first inter-plate channel between the third plate and the fourth plate. The third plate includes a plurality of third convex portions, and the fourth plate includes a plurality of protruding portions. The first inter-plate channel includes a first sub-channel, and the walls forming the first sub-channel include the walls of the protruding portions and the walls of the third convex portions. The arrangement of the first sub-channel is beneficial to improving the flow field of the eddy current near the third convex portions and enhancing the heat exchange effect of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a perspective three-dimensional structure diagram of a first perspective of the heat exchanger provided by the present application;

[0010] Figure 2 is Figure 1 a perspective three-dimensional structure diagram of a partial structure of the heat exchanger in;

[0011] Figure 3 is Figure 2 a perspective three-dimensional structure diagram of a first plate in;

[0012] Figure 4 is Figure 3 an enlarged structure diagram of part A in;

[0013] Figure 5 is Figure 2 a perspective three-dimensional structure diagram of a second plate in;

[0014] Figure 6 is Figure 5 an enlarged structure diagram of part B in;

[0015] Figure 7 is Figure 2 a perspective three-dimensional structure diagram of the mating structure of the first plate and the second plate in;

[0016] Figure 8 is Figure 2 a perspective three-dimensional structure diagram of another perspective of the mating structure of the first plate and the second plate in;

[0017] Figure 9 It is a three-dimensional structure schematic diagram of a perspective of a partial structure in the second embodiment of the heat exchanger;

[0018] Figure 10 It is Figure 9 a three-dimensional structure schematic diagram of a perspective of the second plate in

[0019] Figure 11 It is Figure 10 an enlarged structure schematic diagram of part C in

[0020] Figure 12 Figure 9 a three-dimensional structure schematic diagram of a perspective of the mating structure of the first plate and the second plate in

[0021] Figure 13 It is Figure 9 a three-dimensional structure schematic diagram of another perspective of the mating structure of the first plate and the second plate in

[0022] Figure 14 a three-dimensional structure schematic diagram of a perspective of the mating structure of the first plate and the second plate in another heat exchanger;

[0023] Figure 15 It is a three-dimensional structure schematic diagram of another perspective of the mating structure of the first plate and the second plate in another heat exchanger. Detailed implementation manners

[0024] The following further illustrates the present application in conjunction with the accompanying drawings and specific embodiments:

[0025] In conjunction 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 first inter-plate channel S1 and the second inter-plate channel S2 are not connected. The first inter-plate channel S1 is for the first fluid to flow. In this embodiment, the first fluid refers to a refrigerant, and the refrigerant is mainly a refrigerant, such as R134a, R1234yf, etc. The second inter-plate channel S2 is for the second fluid to flow. In this embodiment, the second fluid refers to a coolant, and the coolant is mainly a heat transfer medium, such as cooling water or cooling oil. Heat exchange occurs between the first fluid and the second fluid. 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 channel 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 channel S2 can be continuously arranged, and one layer of the first inter-plate channel S1 can be arranged, so that heat exchange between the first fluid and the second fluid can also be achieved. 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.

[0026] Combined with Figure 1 , Figures 3 - 8 , the heat exchanger 100 includes a plurality of first plate pieces 1 and a plurality of second plate pieces 2. The first plate pieces 1 and the second plate pieces 2 are alternately stacked in sequence. There is a first inter-plate channel S1 between the first plate piece 1 and an adjacent second plate piece 2, and there is a second inter-plate channel S2 between the first plate piece 1 and another adjacent second plate piece 2. The first plate piece 1 includes a plurality of first convex portions 12 which protrude toward the first inter-plate channel S1 side. The first convex portion 12 includes a concave portion 121, and the first convex portion 12 includes a first top portion 122. The concave portion 121 is recessed from the first top portion 122 away from the first inter-plate channel S1, and both ends of the concave portion 121 are open. The first top portion 122 is fixedly connected to the second plate piece 2. The first inter-plate channel S1 includes a first sub-channel S11, and the wall forming the first sub-channel S11 includes the wall of the concave portion 121. The first convex portion 12 is arranged to facilitate the generation of vortices. Vortices are formed on both sides of the first convex portion 12. When the vortex size is large, a flow dead zone is likely to be formed near the first convex portion 12. The arrangement of the concave portion 121 allows the first fluid 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.

[0027] In other embodiments, among the plurality of first convex portions 12, some of the first convex portions 12 may be provided with recesses 121, and some of the first convex portions 12 may not be provided with recesses 121.

[0028] Referring to Figure 8 , a longitudinal direction L is defined. The first fluid and the second fluid flow along the longitudinal direction L, and the main flow directions of the first fluid and the second fluid are consistent with the longitudinal direction L. In this embodiment, the longitudinal direction L refers to the length direction of the heat exchange plate 4. In this embodiment, the first top portion 122 of the first convex portion 12 includes two, and the recess 121 is located between the two first top portions 122. The recess 121 extends along the longitudinal direction L, so that the flow resistance of the refrigerant flowing into the first sub-channel S11 is small, which is beneficial to improving the flow field near the vortex.

[0029] In other embodiments, the recess 121 may also extend in a direction that forms an acute angle or an obtuse angle with the longitudinal direction L. In this way, the recess 121 can also allow the first fluid to flow through, improve the flow field near the vortex, and improve the heat exchange effect of the heat exchanger 100.

[0030] In other embodiments, several recesses 121 may extend along the longitudinal direction L, and several recesses 121 may extend in a direction that forms an acute angle or an obtuse angle with the longitudinal direction L. In this way, the recesses 121 can also allow the refrigerant fluid to flow through, improve the flow field near the vortex, and improve the heat exchange effect of the heat exchanger 100.

[0031] In other embodiments, multiple first top portions 122 may also be provided, and multiple recesses 121 may also be provided. The recesses 121 are located between two adjacent first top portions 122.

[0032] Combined with Figure 3 and Figure 5 , in this application, the first plate 1 and the second plate 2 are collectively referred to as the heat exchange plate 4. The heat exchange plate 4 includes a heat exchange area 41, a first corner hole area 42, and a second corner hole area 43. 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. In other embodiments, the first convex portion 12 may also be extended to the first corner hole area 42 or the second corner hole area 43.

[0033] Combined with Figure 3 and Figure 4The first plate 1 includes a first substrate 11, the first protrusion 12 protrudes relative to the first substrate 11, the second plate 2 includes a second substrate 21, and the first top 122 is welded and fixed to the second substrate 21. The second plate 2 includes a plurality of protrusions 23, the protrusions 23 protrude relative to the second substrate 21 away from the first inter-plate channel S1, and the wall forming the first sub-channel S11 also includes the wall of the protrusions 23. In the present application, the first substrate 11 refers to the unprocessed flat plate portion of the first plate 1, and the second substrate 21 refers to the unprocessed flat plate portion of the second plate 2.

[0034] Combination Figure 4 , Figures 7 - 8 In this embodiment, the first substrate 11 includes a first plate surface 111 and a second plate surface 112, the first plate surface 111 and the second plate surface 112 are arranged opposite to each other, and the first convex portion 12 is located on the first plate surface 111. In other embodiments, the heat exchange area 41 of the first plate 1 may also be raised downward relative to the first substrate 11 as a whole, and the heat exchange area 41 is provided with the first convex portion 12, 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.

[0035] Combination Figure 5 and Figure 6 The second plate 2 includes a second substrate 21, and 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 back to back, and the first plate surface 111 and the fourth plate surface 212 are arranged opposite to each other.

[0036] The second plate 2 further includes a plurality of second protrusions 22 and a plurality of raised portions 23, and the second protrusions 22 and the raised portions 23 are located in the heat exchange area 41. The second protrusions 22 and the raised portions 23 are both raised relative to the third plate surface 211, and the second protrusions 22 and the raised portions 23 are raised away from the first inter-plate channel S1. In this embodiment, the second protrusions 22 and the raised portions 23 are both located in the heat exchange area 41. In other embodiments, the second protrusions 22 and the raised portions 23 may also be extended to the first corner hole area 42 or the second corner hole area 43.

[0037] 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 an ellipse, and the projection of the second convex portion 22 on the first plate surface 111 is a circle or an ellipse. Of course, in other embodiments, the projection of the first convex portion 12 or the second convex portion 22 on the first plate surface 111 may also be a pentagon, etc.

[0038] Reference Figure 4, define a first direction F1 and a second direction F2. 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 set symmetrically with respect to the longitudinal direction L for the convenience of explaining the first direction F1 and the second direction F2. In this embodiment, α is 40° to 70°, including 40° and 70°, so that the first protrusions can be arranged more densely. The second convex portions 22 are arranged in an array along the first direction F1 and the second direction F2, and the protruding portions 23 are arranged in an array along the first direction F1 and the second direction F2. The first top 122 of the first convex portion 12 is fixedly welded to the second substrate 21 of the adjacent second plate 2, and the first substrate 11 is fixedly welded to the second convex portion 22 of the adjacent other second plate 2. In other embodiments, the first plate 1 and the second plate 2 can also be fixedly bonded.

[0039] Combined with Figures 7 - 8 , in this embodiment, the protruding portion 23 extends along the longitudinal direction L. Along the extension direction of the protruding portion 23, both ends of the protruding portion 23 are respectively connected to the first side walls 221 of two adjacent second convex portions 22. The protruding portion 23 and the concave portion 121 enclose a first sub-channel S11. The setting of the first sub-channel S11 provides a flow path for the first fluid, which is beneficial to improving the flow field of the eddy currents on both sides of the first convex portion 12 and enhancing the heat exchange effect of the heat exchanger 100.

[0040] Combined with Figure 4 and Figure 7 , the concave portion 121 includes a first groove 1211. The first groove 1211 is a part of the first sub-channel S11. The first groove 1211 extends along the longitudinal direction L, so that the flow direction of the first sub-channel S11 is consistent with the main flow direction of the first fluid, which is beneficial to reducing the flow resistance of the first fluid.

[0041] Combined with Figure 4 and Figure 7 , the first plate 1 includes a groove 14. The groove 14 is located between adjacent first convex portions 12. The grooves 14 on both sides of the first convex portion 12 are communicated through the first groove 1211, realizing the communication between the first sub-channel S11 and the groove 14. In this embodiment, the groove 14 is located between four adjacent first convex portions 12. In this embodiment, the wall forming the first sub-channel S11 includes the wall forming the first groove 1211 and the wall of the protruding portion 23.

[0042] In other embodiments, the first convex portions 12 can also be arranged in a scattered manner. The arrangement manner of the first convex portions 12 is not limited, and the second convex portions 22 can also be arranged in a scattered manner.

[0043] In other embodiments, the heat exchange area 41 of the second plate 2 can also bulge downward as a whole relative to the second substrate 21, and the second convex portions 22 and the protruding portions 23 are arranged in the heat exchange area 41.

[0044] Referring to 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, so that it is easy to generate eddy currents, which is beneficial to increasing the heat exchange effect between the first fluid and the second fluid.

[0045] In other embodiments, a concave portion 121 may be provided on the first plate 1, and the second plate 2 may not be provided with a convex portion 23. The wall forming the first sub-channel S11 includes the wall of the concave portion 121 and the wall of the second base plate 211.

[0046] In other embodiments, the second plate 2 may be provided with a convex portion 23, and the first plate 1 may not be provided with a concave portion 121. The wall forming the first sub-channel S11 includes the wall of the convex portion 23 and the wall of the first base plate 111.

[0047] Referring to Figure 4 , in this embodiment, the concave portion 121 includes a first bottom portion 1212. Along the height direction of the heat exchanger 100, the first bottom portion 1212 is closer to the first base plate 11 than the first top portion 122. This can reduce the thinning of the first plate 1 caused by the forming of the concave portion 121. In other embodiments, the distances of the first bottom portion 1212 and the first top portion 122 from the first base plate 11 may also be the same.

[0048] Referring to Figure 6 , the second convex portion 22 includes a second top portion 222, and the convex portion 23 includes a third top portion 231. Along the height direction of the heat exchanger 100, the second top portion 222 is farther from the second base plate 21 than the third top portion 231. This can reduce the thinning of the second plate 2 caused by the forming of the convex portion 23. In other embodiments, the distances of the second top portion 222 and the third top portion 231 from the second base plate 21 may also be the same.

[0049] Combined with Figure 4 and Figure 6 , 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 222 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 may also be curved, and the second top portion 222 may also be curved.

[0050] Combined with Figure 4 and Figure 6, in this embodiment, the first bottom 1212 of the concave portion 121 is planar, and the third top 231 of the convex portion 23 is planar, which facilitates the forming of the first sheet 1 and the second sheet 2. In other embodiments, the first bottom 1212 of the concave portion 121 may also be curved, and the third top 231 of the convex portion 23 may also be curved. One or more concave portions 121 may be provided, and the number of convex portions 23 is correspondingly set with respect to the concave portions 121.

[0051] Combined with Figure 4 、 Figures 7 - 8 , in this embodiment, the first sheet 1 includes a first groove 13. Along the first direction F1 and the second direction F2, the first groove 13 is located between two adjacent first convex portions 12. The wall forming the first groove 13 is connected to the first top 122 of two adjacent first convex portions 12, and the first groove 13 communicates with the first sub-channel S11. In this embodiment, the wall forming the first groove 13 is curved, which facilitates the forming of the first sheet 1. The setting of the first groove 13 is beneficial to increasing the heat exchange area of the first sheet 1 and providing the heat exchange effect between the refrigerant and the coolant. In this embodiment, the end of the wall forming the first groove 13 is connected to the first top 122. In other embodiments, the end of the wall forming the first groove 13 may also be connected to the second side wall 124 of the first convex portion 12.

[0052] Combined with Figure 6 、 Figures 7 - 8 , in this embodiment, the second sheet 2 includes a second groove 24. Along the first direction F1 and the second direction F2, the second groove 24 is located between two adjacent second convex portions 22. The wall forming the second groove 24 is connected to the second top 222 of two adjacent second convex portions 22. In this embodiment, the wall forming the second groove 24 is curved, which facilitates the forming of the second sheet 2. The setting of the second groove 24 is beneficial to increasing the heat exchange area of the second sheet 2 and providing the heat exchange effect between the refrigerant and the coolant. In other embodiments, the end of the wall forming the second groove 24 may also be connected to the first side wall 221 of the second convex portion 22.

[0053] Combined with Figures 7 - 8, in this embodiment, the first inter-plate channel S1 includes a first sub-channel S11, a second sub-channel S12, and a third sub-channel S13. The first sub-channel S11 and the second sub-channel S12 are connected, and the second sub-channel S12 and the third sub-channel S13 are connected. The wall forming the second sub-channel S12 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 third sub-channel S13 includes the wall of the first groove 13 and the wall of the second groove 24. In this embodiment, along the stacking direction of the first plate 1 and the second plate 2, the maximum height of the second sub-channel S12 is greater than the maximum height of the third sub-channel S13. In this way, when the refrigerant flows from the second sub-channel S12 to the third sub-channel S13 and then from the third sub-channel S13 to the second sub-channel S12, 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.

[0054] When the refrigerant flows from the third sub-channel S13 to the second sub-channel S12, there are two third sub-channels S13 near the first convex portion 12. The refrigerant flows in an eddy current in the third sub-channel S13. The refrigerant in the two third sub-channels S13 converges into the second sub-channel S12. When the eddy current size is large, the refrigerant will be blocked in the second sub-channel S12, resulting in a flow dead zone.

[0055] Combined with Figure 4 , Figures 7 - 8 , in this embodiment, the maximum height of the second sub-channel S12 is greater than the maximum height of the first sub-channel S11. In this way, when the refrigerant flows from the first sub-channel S11 to the second sub-channel S12 and then from the second sub-channel S12 to the first sub-channel S11, it experiences a gradual change in channel height from low to high and then from high to low. This is beneficial to enhancing the flow of the refrigerant and improving the heat exchange between the refrigerant and the coolant.

[0056] Combined with Figures 7 - 8 , in this embodiment, along the direction perpendicular to the extension direction of the concave portion 121, the maximum width of the flow cross-section of the first sub-channel S11 is k1; along the first direction F1 or the second direction F2, the width of the flow cross-section of the third sub-channel S13 is k2, and k1 < k2. In this way, the flow rate of the refrigerant distributed to the first sub-channel S11 is less than the flow rate of the refrigerant distributed to the third sub-channel S13. The refrigerant flowing through the third sub-channel S13 can form an eddy current. This is more conducive to the formation of the eddy current and enhances the heat exchange between the refrigerant and the coolant. Of course, in other embodiments, k1 can also be equal to or greater than k2.

[0057] In other embodiments, near the first corner hole area 42 or the second corner hole area 43, the first groove 13 can also be provided between adjacent first convex portions 12.

[0058] In other embodiments, the walls of the first groove 13 formed on the first plate 1 may not be curved surfaces, and the walls forming the first groove 13 are the first plate surface 111. The walls of the second groove 24 formed on the second plate 2 are not curved surfaces, and the walls forming the second groove 24 are the third plate surface 211. Of course, in other embodiments, only the first plate 1 may include the curved walls forming the first groove 13, or only the second plate 2 may have the curved walls forming the second groove 24.

[0059] Combined Figure 4 、 Figures 7 - 8 , in this embodiment, along the extension direction of the recess 121, the apex angle of the triangle formed by three adjacent first protrusions 12 is β, and β is the distribution angle of the first protrusions 12. In this embodiment, β is 80° to 140°, including 80° and 140°; β is equal to 2α, and the first protrusions 12 are arranged in an array along the directions forming an angle α and -α with the longitudinal L direction. The angles between the third sub-channel S13 and the second sub-channel S12 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 protrusions 12 can be arranged relatively densely. Along the extension direction of the recess 121, the apex angle of the triangle formed by three adjacent recesses 121 is also β.

[0060] Combined Figures 4 - 5 、 Figures 9 - 13 , a schematic diagram of the second embodiment of the heat exchanger 100 is shown. Compared with the first embodiment, the second plate 2 does not have the protrusion 23, and the first protrusions 12 and the second protrusions 22 have different protrusion shapes.

[0061] 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, and the second substrate 21 includes a third plate surface 211 and a fourth plate surface 212.

[0062] Combined Figure 4 and Figure 11 , in this embodiment, the projection of the first protrusion 12 on the first plate surface 111 is elliptical, the projection of the second protrusion 22 on the first plate surface 111 is rhombic, and the structures of the first protrusion 12 and the second protrusion 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.

[0063] Of course, in other embodiments, the projection of the first protrusion 12 on the first plate surface 111 may also be circular or pentagonal, etc., and the projection of the second protrusion 22 on the first plate surface 111 may also be triangular or hexagonal, etc. The shapes of the first protrusion 12 and the second protrusion 22 are arbitrary.

[0064] Combined Figure 4 、 Figure 11 、Figures 12 - 13 , in this embodiment, the first plate 1 is the same as the first plate 1 in Embodiment 1. There is a first groove 13 between two adjacent first protrusions 12, and the wall forming the first groove 13 is curved. The wall forming the second groove 24 of the second plate 2 is not curved, and the wall forming the second groove 24 is the third plate surface 211. The first inter-plate channel S1 includes a first sub-channel S11, and the wall forming the first sub-channel S11 includes the wall of the concave portion 121 and the wall of the second substrate 21, and the wall of the second substrate 21 refers to the third plate surface 211. The setting of the first sub-channel S11 provides a flow channel for the refrigerant, which is beneficial to improving the flow field of the eddy currents on both sides of the first protrusion 12 and enhancing the heat exchange effect of the heat exchanger 100.

[0065] Combined with Figure 4 , Figures 12 - 13 , in this embodiment, the first protrusion 12 includes a first top 122, and the first top 122 is fixedly welded to the fourth plate surface 212 of the second plate 3. The second protrusion 22 includes a second top 222, and the second top 222 is fixedly welded to the second plate surface 112 of the first plate 1. In this embodiment, the second top 222 is planar, which is beneficial to increasing the welding area between the second top 222 and the first plate 1 and enhancing the welding strength between the first plate 1 and the second plate 2. In other embodiments, the second top 222 may also be curved.

[0066] Combined with Figures 12 - 13 , the first inter-plate channel S1 further includes a second sub-channel S12 and a third sub-channel S13. The first sub-channel S11 is communicated with the second sub-channel S12, and the second sub-channel S12 is communicated with the third sub-channel S13. The wall forming the second sub-channel S12 includes the wall of the second protrusion 22 and the wall of the first substrate 11, and the wall forming the third sub-channel S13 includes the wall forming the first groove 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 second sub-channel S12 is greater than the maximum height of the first sub-channel S11, and the maximum height of the second sub-channel S12 is greater than the maximum height of the third sub-channel S13. In this way, when the refrigerant flows from the first sub-channel S11 to the second sub-channel S12 and then from the second sub-channel S12 to the first sub-channel S11, the refrigerant experiences a gradual change in channel height from low to high and then from high to low, which is beneficial to enhancing the flow of the refrigerant and improving the heat exchange between the refrigerant and the coolant.

[0067] The maximum height of the second sub-channel S12 is greater than the minimum height of the third sub-channel S13. In this way, when the refrigerant flows from the second sub-channel S12 to the third sub-channel S13 and then from the third sub-channel S13 to the second sub-channel S12, 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.

[0068] Combined withFigures 12 - 13 In this embodiment, along the direction perpendicular to the extending direction of the recess 121, the maximum width of the cross-section of the first sub-channel S11 is k1, and along the first direction F1 or the second direction F2, the maximum width of the cross-section of the third sub-channel S13 is k2, where k1 < k2. In this way, the flow rate of the refrigerant distributed to the first sub-channel S11 is less than the flow rate of the refrigerant distributed to the third sub-channel S13. The refrigerant flowing through the third sub-channel S13 can form a vortex, which is more conducive to the formation of the vortex and enhances the heat exchange between the refrigerant and the coolant. Of course, in other embodiments, k1 may also be equal to or greater than k2.

[0069] In this embodiment, the width of the first convex portion 12 along the longitudinal direction L is less than the width of the first convex portion 12 along the direction perpendicular to the longitudinal direction L, that is, the dimension of the first convex portion 12 along the direction perpendicular to the main flow direction is larger. This is conducive to the formation of a vortex in the refrigerant flow and is conducive to increasing the heat exchange effect between the refrigerant and the coolant.

[0070] Combined with Figures 12 - 13 In this embodiment, the first plate 1 includes a first groove 13. The first inter-plate channel S1 further includes a second sub-channel S12 and a third sub-channel S13. The wall forming the second sub-channel S12 includes the wall of the third convex portion 32 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 third sub-channel S13 includes the wall of the first groove 13 and the wall of the third substrate 31. Here, the wall of the third substrate 31 refers to the sixth plate surface 312.

[0071] Along the height direction of the heat exchanger 100, the maximum height of the second sub-channel S12 is greater than the height of the first sub-channel S11. In this embodiment, along the height direction of the heat exchanger 100, the maximum height of the second sub-channel S12 is greater than the height of the first sub-channel S11. This is also conducive to improving the heat exchange performance of the heat exchanger 100.

[0072] Combined with Figures 5 - 6 、 Figures 10 - 11 And Figures 14 - 15 In addition, the present application also provides another heat exchanger 100, which includes the second plate in the first embodiment and the second plate in the second embodiment.

[0073] The heat exchanger 100 includes a third plate 3 and a fourth plate 4. The third plate 3 and the fourth plate 4 are stacked. There is a first inter-plate channel S1 between the third plate 3 and an adjacent fourth plate 4, and there is a second inter-plate channel S2 between the third plate 3 and another adjacent fourth plate 4. The first inter-plate channel S1 and the second inter-plate channel S2 are not connected. In this embodiment, the third plate 3 adopts the structure of the second plate 2 in the second embodiment, and the fourth plate 4 adopts the structure of the second plate 2 in the first embodiment.

[0074] Combined withFigures 14 - 15 The third plate 3 includes a plurality of third convex portions 31 that protrude toward the first inter-plate channel S1 side, and the fourth plate 4 includes a plurality of protruding portions 23 that protrude away from the first inter-plate channel S1. The first inter-plate channel S1 includes a first sub-channel S11, and the walls forming the first sub-channel S11 include the walls of the protruding portions 23 and the walls of the third convex portions 31. The provision of the first sub-channel S11 provides a flow channel for the refrigerant, which is beneficial to improving the flow field of the eddy currents on both sides of the third convex portion 31 and enhancing the heat exchange effect of the heat exchanger 100. The third convex portions 31 protrude toward the first inter-plate channel S1 side and the protruding portions 23 protrude away from the first inter-plate channel S1 with respect to the same first inter-plate channel S1.

[0075] Combined with Figures 14 - 15 The third convex portion 31 and the plate surface of the fourth plate 4 are fixedly connected. In this embodiment, the third convex portion 31 and the fourth plate 4 are welded together. The third convex portion 31 includes a fourth top 311, and the fourth plate 4 includes a third base plate 41. The fourth top 311 and the third base plate 41 are welded and fixed, and the walls forming the first sub-channel S11 include the walls of the protruding portions 23 and the fourth top 311. The fourth plate 4 includes a plurality of fourth convex portions 42 that protrude away from the first inter-plate channel S1, the protruding portions 23 connect two adjacent fourth convex portions 42, the third plate 3 includes a fourth base plate 32, the fourth convex portion 42 includes a fifth top 421, the protruding portion 23 includes a third top 231, along the height direction of the heat exchanger 100, the fifth top 421 is farther from the fourth base plate 32 relative to the third top 231, and the fourth convex portion 42 and the fourth base plate 32 are welded and fixed. In this application, the third base plate 41 refers to the unprocessed flat part of the fourth plate 4, and the fourth base plate 32 refers to the unprocessed flat part of the third plate 3.

[0076] Combined with Figures 14 - 15 In this embodiment, the fourth top 311 is planar, which is beneficial to increasing the welding area between the third plate 3 and the fourth plate 4 and enhancing the strength of the heat exchanger 100. The fifth top 421 is planar, which is beneficial to increasing the welding area between the third plate 3 and the fourth plate 4 and enhancing the strength of the heat exchanger 100.

[0077] In other embodiments, the fourth top 311 or the fifth top 421 may also be curved.

[0078] Combined with Figures 14 - 15, there is a gap between adjacent third convex portions 31. The fourth plate 4 includes a third groove 43, and the third groove 43 is located between two adjacent fourth convex portions 42. The third groove 43 communicates with the first sub-channel S11. In this embodiment, the wall forming the third groove 43 is curved, which is beneficial to increasing the heat exchange area of the fourth plate 4. In other embodiments, the wall forming the third groove 43 may also be planar. The planar shape includes a plane parallel to the first plate surface 111, and the planar shape also includes an inclined plane forming an angle with the first plate surface 111.

[0079] Combined with Figures 14 - 15 , the first inter-plate channel S1 includes a second sub-channel S12 and a third sub-channel S13. The first sub-channel S11 communicates with the second sub-channel S12, and the second sub-channel S12 communicates with the third sub-channel S13. The wall forming the second sub-channel S12 includes the wall of the fourth convex portion 42 and the wall of the fourth base plate 32. The wall forming the third sub-channel S13 includes the wall forming the third groove 43 and the wall of the fourth base plate 32. Along the height direction of the heat exchanger 100, the maximum height of the second sub-channel S12 is greater than the maximum height of the first sub-channel S11. In this way, when the refrigerant flows from the first sub-channel S11 to the second sub-channel S12 and then from the second sub-channel S12 to the first sub-channel S11, the refrigerant experiences a gradual change in channel height from low to high and then from high to low, which is beneficial to enhancing the flow of the refrigerant and improving the heat exchange between the refrigerant and the coolant.

[0080] Combined with Figures 14 - 15 , along the height direction of the heat exchanger 100, the maximum height of the second sub-channel S12 is greater than the maximum height of the third sub-channel S13. The maximum height of the second sub-channel S12 is greater than the maximum height of the third sub-channel S13. In this way, when the refrigerant flows from the third sub-channel S13 to the second sub-channel S12 and then from the second sub-channel S12 to the third sub-channel S13, the refrigerant experiences a gradual change in channel height from low to high and then from high to low, which is beneficial to enhancing the flow of the refrigerant and improving the heat exchange between the refrigerant and the coolant.

[0081] In other embodiments, a recess 121 may also be provided on the third convex portion 31. The fourth plate 4 includes a protruding portion 23, and the recess 121 and the protruding portion 23 enclose the first sub-channel S11. Alternatively, a recess 121 is provided on the third convex portion 31, and the fourth plate 4 does not have a protruding portion 23. The recess 121 and the third base plate 41 enclose the first sub-channel S11.

[0082] The structures of the heat exchange plates 4 described in the above solutions can be combined. A first inter-plate channel S1 is formed between the heat exchange plates 4, and the first inter-plate channel S1 includes a first sub-channel S11.

[0083] 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 their 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), characterized in that, It includes a first plate (1) and a second plate (2). There is a first inter-plate channel (S1) between the first plate (1) and the second plate (2). The first plate (1) includes a plurality of first protrusions (12), and the first protrusions (12) protrude toward the side of the first inter-plate channel (S1). At least part of the first protrusions (12) includes recesses (121). The first protrusions (12) include first tops (122), and the recesses (121) are recessed from the first tops (122) away from the first inter-plate channel (S1). The first tops (122) are fixedly connected to the second plate (2). The first inter-plate channel (S1) includes a first sub-channel (S11), and the wall forming the first sub-channel (S11) includes the wall of the recess (121).

2. The heat exchanger (100) according to claim 1, characterized in that, The first plate (1) includes a first base plate (11), and the first protrusions (12) protrude relative to the first base plate (11). The second plate (2) includes a second base plate (21), and the first tops (122) and the second base plate (21) are fixed by welding; The wall forming the first sub-channel (S11) also includes the wall of the second base plate (21); Alternatively, the second plate (2) includes a plurality of protruding parts (23), and the protruding parts (23) protrude relative to the second base plate (21) away from the side of the first inter-plate channel (S1). The wall forming the first sub-channel (S11) also includes the wall of the protruding parts (23).

3. The heat exchanger (100) according to claim 1 or 2, characterized in that, Both ends of the recess (121) are open. The first plate (1) includes a groove (14), and the groove (14) is located between adjacent ones of the plurality of first protrusions (12). The first sub-channel (S11) communicates with the groove (14).

4. The heat exchanger (100) according to claim 3, wherein, The first plate (1) includes a heat exchange area (41), and the first protrusions (12) are located in the heat exchange area (41). The recess (121) includes a first bottom (1212). Along the height direction of the heat exchanger (100), the first bottom (1212) is closer to the first base plate (11) relative to the first top (122). The recess (121) includes a first groove (1211), and the grooves (14) on both sides of the first protrusion (12) communicate through the first groove (1211).

5. The heat exchanger (100) according to claim 4, characterized in that, The second plate (2) includes a plurality of second protrusions (22), and the second protrusions (22) are located in the heat exchange area (41) of the second plate (2). The second protrusions (22) protrude relative to the second base plate (21) away from the side of the first inter-plate channel (S1). The second protrusions (22) are fixed by welding to the first base plate (11). The protruding parts (23) connect two adjacent second protrusions (22). The second protrusions (22) include second tops (222), and the protruding parts (23) include third tops (231). Along the height direction of the heat exchanger (100), the second tops (222) are farther from the second base plate (21) relative to the third tops (231).

6. The heat exchanger (100) according to claim 5, wherein, The first plate (1) includes a first groove (13) located between two adjacent first protrusions (12), and the first groove (13) communicates with the first sub-channel (S11); and / or The second plate (2) includes a second groove (24) located between two adjacent second protrusions (22).

7. The heat exchanger (100) according to claim 6, characterized in that, The first inter-plate channel (S1) further includes a second sub-channel (S12) and a third sub-channel (S13). The first sub-channel (S11) communicates with the second sub-channel (S12), and the second sub-channel (S12) communicates with the third sub-channel (S13). The wall forming the second sub-channel (S12) includes the wall of the second protrusion (22) and the wall of the first substrate (11). The wall forming the third sub-channel (S13) includes the wall forming the first groove (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 second sub-channel (S12) is greater than the maximum height of the first sub-channel (S11), and the maximum height of the second sub-channel (S12) is greater than the maximum height of the third sub-channel (S13).

8. The heat exchanger (100) according to claim 6, wherein, The first inter-plate channel (S1) includes a second sub-channel (S12) and a third sub-channel (S13). The first sub-channel (S11) communicates with the second sub-channel (S12), and the second sub-channel (S12) communicates with the third sub-channel (S13). The wall forming the second sub-channel (S12) includes the wall of the second protrusion (22) and the wall of the first substrate (11). The wall forming the third sub-channel (S13) includes the wall forming the first groove (13) and the wall forming the second groove. Along the stacking direction of the first plate (1) and the second plate (2), the maximum height of the second sub-channel (S12) is greater than the maximum height of the first sub-channel (S11), and the maximum height of the second sub-channel (S12) is greater than the maximum height of the third sub-channel (S13).

9. The heat exchanger (100) according to claim 1 or 2 or 7 or 8, characterized in that, Define a longitudinal direction L, which is consistent with the main flow direction of the fluid. The recess (121) and the protrusion (23) extend along the longitudinal direction L or along a direction that forms an acute angle with the longitudinal direction L.

10. The heat exchanger (100) according to claim 9, characterized in that, The width of the first protrusion (12) along the longitudinal direction L is less than the width of the first protrusion (12) along the direction perpendicular to the longitudinal direction L.

11. The heat exchanger (100) according to claim 10, characterized in that, Along the direction perpendicular to the extending direction of the recess (121), the maximum width of the flow cross-section of the first sub-channel (S11) is k1. Define a first direction (F1) and a second direction (F2). The first direction (F1) or the second direction (F2) is the arrangement direction of the first protrusions (12). Along the first direction (F1) or the second direction (F2), the maximum width of the flow cross-section of the third sub-channel (S13) is k2, and k1 < k2.

12. A heat exchanger (100), characterized in that, The heat exchanger (100) includes a third plate (3) and a fourth plate (4). The third plate (3) and the fourth plate (4) are stacked. There is a first inter-plate channel (S1) between the third plate (3) and the fourth plate (4). The third plate (3) includes a plurality of third protrusions (31), and the third protrusions (31) protrude towards the side of the first inter-plate channel (S1). The fourth plate (4) includes a plurality of protrusions (23), and the protrusions (23) protrude away from the first inter-plate channel (S1). The first inter-plate channel (S1) includes a first sub-channel (S11), and the walls forming the first sub-channel (S11) include the walls of the protrusions (23) and the walls of the third protrusions (31).

13. The heat exchanger (100) according to claim 12, characterized in that, The third protrusion (31) includes a fourth top (311), and the fourth plate (4) includes a third base plate (41). The fourth top (311) and the third base plate (41) are welded and fixed, and the walls forming the first sub-channel (S11) include the walls of the protrusions (23) and the fourth top (311).

14. The heat exchanger (100) according to claim 12 or 13, characterized in that, The fourth plate (4) includes a plurality of fourth protrusions (42), and the fourth protrusions (42) protrude away from the first inter-plate channel (S1). The protrusions (23) connect two adjacent fourth protrusions (42). The third plate (3) includes a fourth base plate (32). The fourth protrusion (42) includes a fifth top (421), and the protrusion (23) includes a third top (231). Along the height direction of the heat exchanger (100), the fifth top (421) is farther from the fourth base plate (32) than the third top (231). The fourth protrusion (42) and the fourth base plate (32) are welded and fixed.

15. The heat exchanger (100) according to claim 14, characterized in that, There is a gap between adjacent third protrusions (31). The fourth plate (4) includes a third groove (43), and the third groove (43) is located between two adjacent fourth protrusions (42). The third groove (43) communicates with the first sub-channel (S11).

16. The heat exchanger (100) according to claim 15, characterized in that, The first inter-plate channel (S1) further includes a second sub-channel (S12) and a third sub-channel (S13). The first sub-channel (S11) communicates with the second sub-channel (S12), and the second sub-channel (S12) communicates with the third sub-channel (S13). The walls forming the second sub-channel (S12) include the walls of the fourth protrusions (42) and the walls of the fourth base plate (32). The walls forming the third sub-channel (S13) include the walls forming the third groove (43) and the walls of the fourth base plate (32). Along the height direction of the heat exchanger (100), the maximum height of the second sub-channel (S12) is greater than the maximum height of the first sub-channel (S11), and the maximum height of the second sub-channel (S12) is greater than the maximum height of the third sub-channel (S13).

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