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 protrusions and a plurality of second protrusions, the height of the first protrusions is larger than that of the second protrusions, the second plate sheet comprises a plurality of third protrusions and a plurality of fourth protrusions, and the third protrusions are larger than the fourth protrusions. The third bulge is higher than the fourth bulge, at least part of the first bulge is fixedly connected with at least part of the fourth bulge, and at least part of the second bulge is fixedly connected with at least part of the third bulge; in this way, the protrusions can be arranged densely, the heat exchange area of cooling liquid can be increased, and the heat exchange performance of the heat exchanger can be 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 inter-plate channels, which are surrounded by at least two plates. Usually, one of the plates is provided with a protrusion, and the other plate is flat. The protrusion is welded to the plate surface of the other plate. If the protrusions on a single plate are sparse, the heat exchange performance of the heat exchanger is poor. Therefore, how to improve the heat exchange performance of the heat exchanger is a technical problem. 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 plurality of first protrusions and a plurality of second protrusions, wherein the first protrusions and the second protrusions protrude toward the second plate, and along the height direction of the heat exchanger, the height of the first protrusion is greater than the height of the second protrusion, and the second plate comprises a plurality of third protrusions and a plurality of fourth protrusions, wherein the third protrusions and the fourth protrusions protrude toward the first plate, and along the height direction of the heat exchanger, the height of the third protrusions is greater than the height of the fourth protrusions, and a wall forming the first inter-plate channel comprises the first protrusions, the second protrusions, the third protrusions and the fourth protrusions, wherein at least a portion of the first protrusions and at least a portion of the fourth protrusions are fixedly connected, and at least a portion of the second protrusions and at least a portion of the third protrusions are fixedly connected.

[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 plurality of first protrusions and a plurality of second protrusions, the height of the first protrusion is greater than the height of the second protrusion, the second plate includes a plurality of third protrusions and a plurality of fourth protrusions, the height of the third protrusion is greater than the height of the fourth protrusion, at least part of the first protrusions and at least part of the fourth protrusions are fixedly connected, and at least part of the second protrusions and at least part of the third protrusions are fixedly connected; the height of the first protrusion is greater than the height of the second protrusion, the thinning rate of the second protrusion on the first plate is smaller than that of the first protrusion, the gap between the first protrusion and the second protrusion can be relatively small, the height of the third protrusion is greater than the height of the fourth protrusion, the thinning rate of the fourth protrusion on the second plate is smaller than that of the third protrusion, and the gap between the fourth protrusion and the third protrusion can be relatively small, so that the protrusions can be arranged relatively densely, which can increase the heat exchange area of ​​the coolant, and is beneficial to improving the heat exchange performance of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It 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 2 yes Figure 1 A three-dimensional structural schematic diagram of a local structure of a heat exchanger from one perspective;

[0009] Figure 3 yes Figure 2 Schematic diagram of the exploded structure of the local structure of the heat exchanger;

[0010] Figure 4 yes Figure 2 A schematic diagram of a top view of a local structure of a heat exchanger;

[0011] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure of the local structure of the heat exchanger along the AA plane;

[0012] Figure 6 yes Figure 4 Schematic diagram of the cross-sectional structure of the local structure of the middle heat exchanger along the BB plane;

[0013] Figure 7 yes Figure 4 Schematic diagram of the cross-sectional structure of the local structure of the middle heat exchanger along the CC plane;

[0014] Figure 8 yes Figure 7 A schematic diagram of the enlarged structure of the middle B part;

[0015] Fig. 9 yes Figure 2 A schematic structural diagram of a first plate from one perspective;

[0016] Fig.10 yes Figure 2 A schematic structural diagram of the first plate from another perspective;

[0017] Fig.11 yes Figure 2 A schematic structural diagram of a second plate from one perspective;

[0018] Fig.12 yes Figure 2 A schematic structural diagram of the second plate from another perspective;

[0019] Fig.13 is a schematic structural diagram of a first plate from one perspective in another embodiment of a heat exchanger;

[0020] Fig.14 is a schematic structural diagram of a first plate in another embodiment of a heat exchanger from another perspective;

[0021] Fig.15 is a schematic structural diagram of a second plate from one perspective in another embodiment of a heat exchanger;

[0022] Fig.16 is a schematic structural diagram of a first plate from a perspective in a second embodiment of a heat exchanger;

[0023] Fig.17 is a schematic structural diagram of a second plate from a perspective in a second embodiment of a heat exchanger;

[0024] Fig.18 is a schematic structural diagram of a first plate from a perspective in a third embodiment of a heat exchanger;

[0025] Fig.19 It is a schematic structural diagram from one perspective of the second plate in the third embodiment of the heat exchanger. DETAILED DESCRIPTION

[0026] The present application is further described below with reference to the accompanying drawings and specific embodiments:

[0027] Combination Figure 1-Figure 12, showing a first embodiment of the heat exchanger 100, the heat exchanger 100 comprises a plurality of first plates 1 and a plurality of second plates 2, the first plates 1 and the second plates 2 are stacked. In this embodiment, the first plates 1 and the second plates 2 are stacked alternately in sequence, a first inter-plate channel S1 is provided between the first plate 1 and a second plate 2 adjacent thereto, a second inter-plate channel S2 is provided between the first plate 1 and another second plate 2 adjacent thereto, the first inter-plate channel S1 and the second inter-plate channel S2 are alternately provided, 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 flow of a first fluid, in this embodiment, the first fluid refers to a coolant, such as cooling water, ethylene glycol, or a mixture of cooling water and ethylene glycol in a certain proportion. The second inter-plate channel S2 is for the flow of a second fluid, in this embodiment, the second fluid refers to cooling oil, and the first fluid and the second fluid perform heat exchange. The first inter-plate channel S1 and the second inter-plate channel S2 are alternately provided, so that the area for heat exchange between the first fluid and the second fluid is large, and the heat exchange effect of the heat exchanger 100 is relatively good. In other embodiments, when the heat exchanger 100 is used as an evaporator, the first fluid may be a refrigerant, which is mainly a refrigerant, such as R134a, R1234yf, etc., and the second fluid may be a coolant, which is mainly a coolant, such as cooling water or cooling oil. Of course, in other embodiments, when the heat exchanger 100 is used as an evaporator, the first fluid may also be a coolant, which is mainly a coolant, such as cooling water or cooling oil, and the second fluid may be a refrigerant, which is mainly a refrigerant, such as R134a, R1234yf, etc.

[0028] In this embodiment, the heat exchanger 100 includes a first channel 101, a second channel 102, a third channel 103 and a fourth channel 104. At the first channel 101 and the second channel 102, the first inter-plate channel S1 is open, and the first channel 101 and the second channel 102 are connected to the first inter-plate channel S1. At the first channel 101 and the second channel 102, the second inter-plate channel S2 is not open, and the first channel 101 and the second channel 102 are not connected to the second inter-plate channel S2. The first channel 101 is for the first fluid to flow into the first inter-plate channel S1, and the second channel 102 is for the first fluid to flow out of the first inter-plate channel S1. At the third hole 103 and the fourth hole 104, the second inter-plate channel S2 is open, and the third hole 103 and the fourth hole 104 are connected to the second inter-plate channel S2. At the third hole 103 and the fourth hole 104, the first inter-plate channel S1 is not open, and the third hole 103 and the fourth hole 104 are not connected to the first inter-plate channel S1. The third hole 103 is for the first fluid to flow into the second inter-plate channel S2, and the fourth hole 104 is for the second fluid to flow out of the second inter-plate channel S2. In other embodiments, the second hole 102 can also be for the first fluid to flow into the first inter-plate channel S1, the first hole 101 can be for the first fluid to flow out of the first inter-plate channel S1, the third hole 103 can be for the first fluid to flow into the second inter-plate channel S2, and the fourth hole 104 can be for the second fluid to flow out of the second inter-plate channel S2.

[0029] In this embodiment, the heat exchanger 100 further includes fins 3, which are located in the second inter-plate channel S2. The fins 3 are arranged to increase the heat exchange area of ​​the cooling oil and the cooling liquid, and to increase the heat exchange capacity of the cooling oil and the cooling liquid. Figure 3 The middle fin 3 is a simplified structural diagram of the fin. In other embodiments, two layers of first inter-plate channels S1 may be continuously arranged before one layer of second inter-plate channels S2 is arranged, so that heat exchange between the first fluid and the second fluid can be achieved. In other embodiments, two or more layers of second inter-plate channels S2 may be continuously arranged before several layers of first inter-plate channels S1 are arranged. For the convenience of description, the upper and lower directions are defined as those in the attached drawings of the specification. Figure 1 The upper and lower directions of the heat exchanger 100 are defined as the upper and lower directions of the heat exchanger 100, and the upper and lower directions only represent relative positions; the height direction, length direction, and width direction of the heat exchanger 100 are defined as the height direction, length direction, and width direction of the heat exchanger 100 in the attached drawings of the specification. Figure 1 In the height direction, length direction and width direction of the heat exchanger 100, in the present application, the height direction of the heat exchanger 100 is consistent with the stacking direction of the first plate 1 and the second plate 2; in the present application, the length direction of the first plate 1 and the second plate 2 is consistent with the length direction of the heat exchanger 100, and the width direction of the first plate 1 and the second plate 2 is consistent with the width direction of the heat exchanger 100.

[0030] Combination Figure 7-Figure 12The first plate 1 includes a plurality of first protrusions 11 and a plurality of second protrusions 12. The height of the first protrusions 11 is greater than the height of the second protrusions 12 along the height direction of the heat exchanger 100. The second plate 2 includes a plurality of third protrusions 21 and a plurality of fourth protrusions 22. The height of the third protrusions 21 is greater than the height of the fourth protrusions 22 along the height direction of the heat exchanger 100. The first protrusions 11 and the fourth protrusions 22 are fixedly connected, and the second protrusions 12 and the third protrusions 21 are fixedly connected. The wall forming the first inter-plate channel S1 includes the first protrusions 11, the second protrusions 12, the third protrusions 21 and the fourth protrusions 22. The height of the first protrusions 11 is greater than the height of the second protrusions 12. The thinning rate of the second protrusions 12 on the first plate 1 is smaller than that of the first protrusions 11. The gap between the first protrusions 11 and the second protrusions 12 can be relatively small. In this way, the first protrusions 11 and the second protrusions 12 can be arranged relatively densely. The arrangement of the second protrusions 12 is conducive to increasing the heat exchange area of ​​the first plate 1. The fourth protrusion 22 has a smaller thinning rate on the second plate than the third protrusion 21, and the gap between the fourth protrusion 22 and the third protrusion 21 can be relatively small, so that the third protrusion 21 and the fourth protrusion 22 can be arranged more densely, and the arrangement of the fourth protrusion 22 is conducive to increasing the heat exchange area of ​​the second plate 2. The wall forming the first inter-plate channel S1 includes the first protrusion 11, the second protrusion 12, the third protrusion 21 and the fourth protrusion 22. The arrangement of the second protrusion 12 and the fourth protrusion 22 is conducive to increasing the heat exchange area on the coolant side, which is conducive to improving the heat exchange effect of the heat exchanger 100. In addition, the first protrusion 11 with a large height cooperates with the fourth protrusion 22 with a small height, and the third protrusion 21 with a large height cooperates with the second protrusion 12 with a small height, which is conducive to increasing the flow space of the first inter-plate channel S1 and reducing the flow resistance on the coolant side, which is conducive to increasing the heat exchange of the coolant and the cooling oil and improving the heat exchange effect.

[0031] In this embodiment, the first protrusion 11 and the second protrusion 12 protrude toward the second plate 2, and the first protrusion 11 has an opening facing away from the second plate 2, that is, the first protrusion 11 has an upward opening, and the second protrusion 12 has an opening facing away from the second plate 2, that is, the second protrusion 12 has a downward opening. The third protrusion 21 and the fourth protrusion 22 protrude toward the first plate 1, and the third protrusion 21 has an opening facing away from the first plate 1, that is, the third protrusion 21 has a downward opening, and the fourth protrusion 22 has an opening facing away from the first plate 1, that is, the fourth protrusion 22 has a downward opening.

[0032] In this embodiment, the first protrusion 11 and the fourth protrusion 22 are welded and fixed, the second protrusion 12 and the third protrusion 21 are welded and fixed, and after the first plate 1 and the second plate 2 are stacked, the whole is placed in a brazing furnace for welding, so that the molding process of the heat exchanger 100 is simple. In addition, the first protrusion 11 and the fourth protrusion 22 are densely arranged and welded, and the second protrusion 12 and the third protrusion 21 are densely arranged and welded, which is conducive to increasing the number of welding points of the first plate 1 and the second plate 2, increasing the welding strength of the first plate 1 and the second plate 2, and improving the strength of the heat exchanger 100. In other embodiments, the fourth protrusion 22 and the first protrusion 11 can also be bonded and connected, and the third protrusion 21 and the second protrusion 12 can also be bonded and connected.

[0033] In other embodiments, part of the first protrusion 11 and part of the fourth protrusion 22 may be fixedly connected, and a gap may exist between another part of the first protrusion 11 and another part of the fourth protrusion 22; part of the second protrusion 12 and part of the third protrusion 21 may be fixedly connected, and a gap may exist between another part of the second protrusion 12 and another part of the third protrusion 21; this may also improve the heat exchange performance of the heat exchanger 100.

[0034] In this embodiment, the heat exchanger 100 includes a plurality of plates A, and the plates A include a first plate 1 and a second plate 2, that is, the first plate 1 and the second plate 2 are collectively referred to as plates A. The plate A includes a flange 01 and a body 02, and the flange 01 is arranged along the circumferential protrusion of the body 02. Along the length direction of the heat exchanger 100, the plate A includes a first end 03 and a second end 04, and the body 02 also includes a heat exchange area 021, a first corner hole area 022, and a second corner hole area 023, and the first corner hole area 022 and the second corner hole area 023 are respectively close to the two ends of the heat exchanger 100. In this embodiment, the first corner hole area 022 is arranged close to the first end 03, the second corner hole area 023 is arranged close to the second end 04, and the heat exchange area 021 is located between the first corner hole area 022 and the second corner hole area 023. In this embodiment, the first protrusion 11 and the second protrusion 12 are located in the heat exchange area 021 of the first plate 1 , and the third protrusion 21 and the fourth protrusion 22 are located in the heat exchange area 021 of the second plate 2 .

[0035] Combination Figure 7-Figure 12 The first plate 1 includes a first substrate 16, the first substrate 16 includes a first plate surface 14 and a third plate surface 13, the third plate surface 13 and the first plate surface 14 are arranged opposite to each other, and the second plate 2 includes a second substrate 25, the second substrate 25 includes a second plate surface 23 and a fourth plate surface 24, the second plate surface 23 and the fourth plate surface 24 are arranged opposite to each other. In this embodiment, the first plate surface 14 of the first plate 1 and the second plate surface 23 of the second plate 2 are arranged opposite to each other. In this embodiment, the first substrate 16 refers to the first plate 1 before being stamped, and the second substrate 25 refers to the second plate 2 before being stamped.

[0036] In this embodiment, along the height direction of the heat exchanger 100, the sum of the height of the first protrusion 11 from the first plate surface 14 and the height of the fourth protrusion 22 from the second plate surface 23 is n1, the sum of the height of the second protrusion 12 from the first plate surface 14 and the height of the third protrusion 21 from the second plate surface 23 is n2, n1 is equal to n2, the fourth protrusion 22 and the first protrusion 11 are arranged opposite to each other and welded together, the third protrusion 21 and the second protrusion 12 are arranged opposite to each other and welded together, and n1 is equal to n2, so that each fourth protrusion 22 and each first protrusion 11 can be in contact and welded together, and each third protrusion 21 and each second protrusion 12 can be in contact and welded together, thereby avoiding cold welding and helping to improve the welding strength of the heat exchanger 100.

[0037] In this embodiment, the first protrusion 11 and the second protrusion 12 are arranged to protrude downward, and the first protrusion 11 and the second protrusion 12 both have openings on the side of the third plate surface 13. In this embodiment, the first height H1 of the first top 111 of the first protrusion 11 from the first plate surface 14, the second height H2 of the second top 121 of the second protrusion 12 from the first plate surface 14, the first height H1 of the first top 111 of the first protrusion 11 from the first plate surface 14 is greater than the second height H2 of the second top 121 of the second protrusion 12 from the first plate surface 14, that is, H1 is greater than H2, so that the number of protrusions of the first plate 1 can be increased, thereby increasing the heat exchange area of ​​the first plate 1, and the first plate 1 will not be too thinned, which is conducive to increasing the manufacturability of the first plate 1.

[0038] In this embodiment, the third protrusion 21 and the fourth protrusion 22 are arranged to protrude upward, and the third protrusion 21 and the fourth protrusion 22 both have openings on the side of the fourth plate surface 24. The third height H3 of the third top 211 of the third protrusion 21 from the second plate surface 23, the fourth height H4 of the fourth top 221 of the fourth protrusion 22 from the second plate surface 23, the third height H3 of the third top 211 of the third protrusion 21 from the second plate surface 23 is greater than the fourth height H4 of the fourth top 221 of the fourth protrusion 22 from the second plate surface 23, that is, H3 is greater than H4, so that the number of protrusions of the second plate 2 can be increased, thereby increasing the heat exchange area of ​​the second plate 2, and the second plate 2 will not be too thinned, which is conducive to increasing the manufacturability of the second plate 2.

[0039] In this embodiment, the third height H3 of the third top 211 of the third protrusion 21 from the second plate surface 23 is equal to the first height H1 of the first top 111 of the first protrusion 11 from the first plate surface 14, that is, H3 is equal to H1, and the fourth height H4 of the fourth top 221 of the fourth protrusion 22 from the second plate surface 23 is equal to the second height H2 of the second top 121 of the second protrusion 12 from the first plate surface 14, that is, H4 is equal to H2, which facilitates the welding cooperation of the fourth protrusion 22 and the first protrusion 11, facilitates the welding cooperation of the third protrusion 21 and the second protrusion 12, and is also conducive to avoiding cold welding and improving the welding strength of the heat exchanger 100. In this embodiment, H3 is equal to H1, H4 is equal to H2, the third protrusion 21 and the first protrusion 11 are of the same size, and the fourth protrusion 22 and the second protrusion 12 are of the same size. The first protrusion 11, the second protrusion 12, and the fourth protrusion 22 can be formed by stamping, and H3 is equal to H1, so that the third protrusion 21 and the first protrusion 11 can be stamped by the same set of stamping dies; H4 is equal to H2, so that the fourth protrusion 22 and the second protrusion 12 can be stamped by the same set of stamping dies, and the forming of the first plate 1 and the second plate 2 only requires two sets of stamping dies, which is convenient for the manufacture of the heat exchanger 100 and helps save manufacturing costs, which facilitates the forming of the first plate 1 and the second plate 2.

[0040] In other embodiments, the first height H1 of the first protrusion 11 from the first plate surface 14 may also be different from the third height H3 of the third protrusion 21 from the second plate surface 23, and the second height H2 of the second protrusion 12 from the first plate surface 14 may be different from the fourth height H4 of the fourth protrusion 22 from the second plate surface 23, but the sum n1 of the first height H1 of the first protrusion 11 from the first plate surface 14 and the fourth height H4 of the fourth protrusion 22 from the second plate surface 23 is equal to the sum n2 of the second height H2 of the second protrusion 12 from the first plate surface 14 and the third height H3 of the third protrusion 21 from the second plate surface 23, so that the welding fixation of the fourth protrusion 22 and the first protrusion 11 and the welding fixation of the third protrusion 21 and the second protrusion 12 can also be achieved. For example, H1 is greater than H3, H4 is less than H2, and H1+H4=H2+H3; or, H1 is less than H3, H4 is greater than H2, and H1+H4=H2+H3.

[0041] In other embodiments, the heights of the first protrusions 11 from the first plate surface 14 may be different, the heights of the third protrusions 21 from the second plate surface 23 may be different, the heights H2 of the second protrusions 12 from the first plate surface 14 may be different, and the heights of the fourth protrusions 22 from the second plate surface 23 may be different. However, the sum of the heights of the relatively arranged first protrusions 11 and the fourth protrusions 22 from the second plate surface 23 is controlled to be n1, and the sum of the heights of the relatively arranged second protrusions 12 and the third protrusions 21 from the second plate surface 23 is controlled to be n2, and n1=n2. In this way, the welding fixation of the fourth protrusion 22 and the first protrusion 11, and the welding fixation of the third protrusion 21 and the second protrusion 12 can be achieved.

[0042] Combination Figure 8-Figure 12 , defining a first direction, a plurality of first protrusions 11 and a plurality of second protrusions 12 are alternately arranged along the first direction, that is, along the first direction, there is a second protrusion 12 between adjacent first protrusions 11. A plurality of fourth protrusions 22 and a plurality of third protrusions 21 are alternately arranged along the first direction, the first protrusions 11 and the fourth protrusions 22 are arranged opposite to each other and fixed by welding, and the second protrusions 12 and the third protrusions 21 are arranged opposite to each other and fixed by welding. The second protrusion 12 can increase the number of protrusions of the first plate 1, thereby increasing the heat exchange area of ​​the first plate 1, and will not thin the first plate 1 too much. The fourth protrusion 22 can increase the number of protrusions of the second plate 2, thereby increasing the heat exchange area of ​​the second plate 2, and will not thin the second plate 2 too much. The first plate 1 and the second plate 2 cooperate to increase the heat exchange area of ​​the coolant and the cooling oil. The first protrusion 11 with a large height cooperates with the fourth protrusion 22 with a small height, and the third protrusion 21 with a large height cooperates with the second protrusion 12 with a small height. It can also increase the height of the first inter-plate channel S1, reduce the resistance of the coolant flow, and further enhance the heat exchange of the coolant and the cooling oil. The first protrusion 11 and the second protrusion 12 are alternately arranged along the first direction, and the fourth protrusion 22 and the third protrusion 21 are alternately arranged along the first direction, which is also convenient for the cooperation between the first plate 1 and the second plate 2. In other embodiments, there can also be multiple second protrusions 12 between adjacent first protrusions 11.

[0043] Define the second direction, a plurality of first protrusions 11 and a plurality of second protrusions 12 are alternately arranged along the second direction, that is, along the second direction, there is a second protrusion 12 between adjacent first protrusions 11. A plurality of fourth protrusions 22 and a plurality of third protrusions 21 are alternately arranged along the second direction, the first protrusion 11 and the fourth protrusion 22 are arranged oppositely and fixed by welding, and the second protrusion 12 and the third protrusion 21 are arranged oppositely and fixed by welding. The first protrusion 11 and the second protrusion 12 have different heights, which is conducive to increasing the heat exchange area of ​​the first plate 1 and improving the heat exchange effect, and the first plate 1 will not be thinned too much; the third protrusion 21 and the fourth protrusion 22 have different heights, which is conducive to increasing the heat exchange area of ​​the second plate 2 and improving the heat exchange effect. The first protrusion 11 and the second protrusion 12 are alternately arranged along the second direction, and the fourth protrusion 22 and the third protrusion 21 are alternately arranged along the second direction, which is also convenient for the first plate 1 and the second plate 2 to cooperate.

[0044] In this embodiment, the projections of the first protrusion 11, the second protrusion 12, the third protrusion 21, and the fourth protrusion 22 on the first plate surface 14 are circular, and the first protrusion 11, the second protrusion 12, the third protrusion 21, and the fourth protrusion 22 are roughly hemispherical, so that the wall formed by the protrusion is relatively smooth, which can reduce the resistance of the wall formed by the protrusion to the coolant. The first protrusion 11, the second protrusion 12, the third protrusion 21, and the fourth protrusion 22 are collectively referred to as protrusions. In this embodiment, the first top 111 of the first protrusion 11 and the fourth top 221 of the fourth protrusion 22 are welded and fixed, and the second top 121 of the second protrusion 12 and the third top 211 of the third protrusion 21 are welded and fixed. In this embodiment, the first top 111 of the first protrusion 11 is planar, and the fourth top 221 of the fourth protrusion 22 is planar, which can increase the welding area of ​​the first protrusion 11 and the fourth protrusion 22 and improve the welding strength of the heat exchanger 100; the second top 121 of the second protrusion 12 is planar, and the third top 211 of the third protrusion 21 is planar, which can increase the welding area of ​​the second protrusion 12 and the third protrusion 21 and improve the welding strength of the heat exchanger 100.

[0045] In this embodiment, the first top 111 of the first protrusion 11 is roughly parallel to the board surface of the first plate 1, and the fourth top 221 of the fourth protrusion 22 is roughly parallel to the board surface of the second plate 2, which facilitates the cooperation between the first protrusion 11 and the fourth protrusion 22; the second top 121 of the second protrusion 12 is roughly parallel to the board surface of the first plate 1, and the third top 211 of the third protrusion 21 is roughly parallel to the board surface of the second plate 2, which facilitates the cooperation between the second protrusion 12 and the third protrusion 21. In other embodiments, the first top 111 of the first protrusion 11 can also be tilted relative to the board surface of the first plate 1, the fourth top 221 of the fourth protrusion 22 is also tilted relative to the board surface of the second plate 2, and the first top 111 of the first protrusion 11 and the fourth top 221 of the fourth protrusion 22 are roughly parallel; the second top 121 of the second protrusion 12 is tilted relative to the board surface of the first plate 1, and the third top 211 of the third protrusion 21 is also tilted relative to the board surface of the second plate 2, and the second top 121 of the second protrusion 12 and the third top 211 of the third protrusion 21 are roughly parallel.

[0046] In other embodiments, the first top 111 of the first protrusion 11 may also be planar, the second top 121 of the second protrusion 12 may be planar, the third top 211 of the third protrusion 21 may be curved, and the fourth top 221 of the fourth protrusion 22 may be curved; or, the first top 111 of the first protrusion 11 may be curved, the second top 121 of the second protrusion 12 may be curved, the third top 211 of the third protrusion 21 may be curved, and the fourth top 221 of the fourth protrusion 22 may be curved.

[0047] In other embodiments, the projections of the first protrusion 11 , the second protrusion 12 , the third protrusion 21 , and the fourth protrusion 22 on the first plate surface 14 may also be elliptical, oval, square, or the like.

[0048] In other embodiments, a plurality of first protrusions 11 and a plurality of second protrusions 12 may be alternately arranged along the second direction, a plurality of first protrusions 11 may be arranged along the second direction, the second protrusions 12 may not be arranged along the second direction, the third protrusion 21 and the second protrusion 12 may be arranged relatively to each other and fixed by welding, and the fourth protrusion 22 and the first protrusion 11 may be arranged relatively to each other and fixed by welding. Alternatively, a plurality of first protrusions 11 and a plurality of second protrusions 12 may be alternately arranged along the second direction, a plurality of first protrusions 11 may be arranged along the first direction, the second protrusions 12 may not be arranged along the first direction, the third protrusion 21 and the second protrusion 12 may be arranged relatively to each other and fixed by welding, and the fourth protrusion 22 and the first protrusion 11 may be arranged relatively to each other and fixed by welding, which may also achieve the effect of improving the heat exchange performance of the heat exchanger 100.

[0049] In this embodiment, the angle between the first direction and the length direction of the first plate 1 is α, and α can be 15° to 75°. In this embodiment, α is 20° to 70°, including 20° and 70°. When α is other values ​​and α is 20° to 70°, the first protrusion 11, the second protrusion 12, the third protrusion 21 and the fourth protrusion 22 can be arranged relatively densely, which is conducive to improving the heat exchange efficiency of the cooling oil and the coolant.

[0050] In this embodiment, the angle between the second direction and the length direction of the first plate 1 is β, and β can be -75° to -15°. In this embodiment, β is -70° to -20°, including -20° and -70°. When β is other values, and β is -70° to -20°, the first protrusion 11, the second protrusion 12, the third protrusion 21 and the fourth protrusion 22 can be arranged relatively densely, which is conducive to improving the heat exchange efficiency of the cooling oil and the coolant. In this embodiment, α and β are the same, which facilitates the welding and matching of the first plate 1 and the second plate 2, and the protrusions can be arranged relatively densely, thereby improving heat exchange. In other embodiments, α and β may also be different.

[0051] In at least one group of adjacent first plates 1 and second plates 2 in the heat exchanger 100, the first plate 1 is provided with a first protrusion 11 and a second protrusion 12, the second plate 2 is provided with a third protrusion 21 and a fourth protrusion 22, the third protrusion 21 and the second protrusion 12 are relatively arranged and welded, and the fourth protrusion 22 and the first protrusion 11 are relatively arranged and welded, so that the heat exchange effect of the heat exchanger 100 can be improved.

[0052] Combination Figure 3 , Figure 4-Figure 7 In this embodiment, the fin 3 is located in the second inter-plate channel S2, and the fin 3 is located between the fourth plate surface 24 of the second plate 2 and the third plate surface 13 of the first plate 1. The fin 3 includes a plurality of recesses 33 and a plurality of protrusions 34 to increase the heat exchange area of ​​the cooling oil and the coolant and improve the heat exchange effect of the heat exchanger 100. The fin 3 includes a first end surface 31 and a second end surface 32, and the first end surface 31 and the second end surface 32 are arranged opposite to each other. The first end surface 31 is the top surface of the protrusion 34, and the second end surface 32 is the bottom surface of the recess 33. The first end surface 31 is fixedly connected to the fourth plate surface 24 of the second plate 2, and the second end surface 32 is fixedly connected to the third plate surface 13 of the first plate 1, which is conducive to reducing the distance between the fin 3 and the third plate surface 13 and the fourth plate surface 24, which is conducive to the heat exchange of the cooling oil and the coolant and improves the heat transfer effect of the cooling oil and the coolant. In this embodiment, the fixed connection refers to the welding connection. In other embodiments, the fixed connection can also refer to the bonding connection, etc. In other embodiments, the fin 3 is located in the second inter-plate channel S2, and the fin 3 and the third plate surface 13 and the fourth plate surface 24 may not be fixedly connected.

[0053] In this embodiment, the outer diameter of the first protrusion 11 is greater than the outer diameter of the second protrusion 12, the area of ​​the opening of the first protrusion 11 on the third plate surface 13 side is smaller than the area of ​​the opening of the second protrusion 12 on the third plate surface 13 side, and the opening formed by the second protrusion 12 on the third plate surface 13 of the first plate 1 is smaller, which is conducive to the second end surface 32 of the fin 3 and the third plate surface 13 of the first plate 1, and is convenient for fixing the fin 3. The outer diameter of the third protrusion 21 is greater than the outer diameter of the fourth protrusion 22, the area of ​​the opening of the third protrusion 21 on the fourth plate surface 24 side is smaller than the area of ​​the opening of the fourth protrusion 22 on the fourth plate surface 24 side, and the opening formed by the third protrusion 21 on the fourth plate surface 24 of the second plate 2 is smaller, which is conducive to the first end surface 31 of the fin 3 and the fourth plate surface 24 of the second plate 2, and is convenient for fixing the fin 3. In other embodiments, the outer diameter of the first protrusion 11 may be equal to or smaller than the outer diameter of the second protrusion 12, and the outer diameter of the third protrusion 21 may be equal to or smaller than the outer diameter of the fourth protrusion 22.

[0054] In this embodiment, the outer diameter of the third protrusion 21 is equal to the outer diameter of the first protrusion 11, and the outer diameter of the fourth protrusion 22 is equal to the outer diameter of the second protrusion 12. In this way, only two sets of stamping dies are needed to form the protrusions of the first plate 1 and the second plate 2, which facilitates the forming of the heat exchanger 100 and helps save costs. In other embodiments, the outer diameter of the third protrusion 21 can also be greater than or less than the outer diameter of the first protrusion 11, and the outer diameter of the fourth protrusion 22 can also be not greater than or less than the outer diameter of the second protrusion 12.

[0055] In this embodiment, the first plate 1 also includes a first reinforcement portion 17 and a second reinforcement portion 18, the first reinforcement portion 17 and the second reinforcement portion 18 are located in the first corner hole area 022, the first reinforcement portion 17 and the second reinforcement portion 18 are located in the second corner hole area 023, the first reinforcement portion 17 and the second reinforcement portion 18 protrude toward the second plate 2, the second plate 2 includes a third reinforcement portion 26 arranged opposite to the second reinforcement portion 18 and welded and fixed, the second plate 2 also includes a fourth reinforcement portion 27 arranged opposite to the first reinforcement portion 17 and welded and fixed, so that the number of welding points of the first plate 1 and the second plate 2 can be increased, which is beneficial to increase the strength of the heat exchanger 100. In this embodiment, along the height direction of the heat exchanger 100, the fifth height h1 (not shown in the figure) of the first reinforcement portion 17 from the first plate surface 14 is less than the sixth height h2 of the second reinforcement portion 18 from the first plate surface 14, the seventh height h4 of the fourth reinforcement portion 27 from the second plate surface 23 is less than the eighth height h3 of the third reinforcement portion 26 from the second plate surface 23, the fifth height h1 of the first reinforcement portion 17 from the first plate surface 14 is equal to the eighth height h3 of the third reinforcement portion 26 from the second plate surface 23, and the sixth height h2 of the second reinforcement portion 18 from the first plate surface 14 is equal to the sixth height h2 of the fourth reinforcement portion 27 from the second plate surface 23. In this embodiment, h1=H1=H3=h3, h2=H2=H4=h4, so that the first protrusion 11, the third protrusion 21, the first reinforcing rib 17, and the third reinforcing rib 26 can be stamped and formed by the same set of stamping dies, and the second protrusion 12, the fourth protrusion 22, the second reinforcing rib 18, and the fourth reinforcing rib 27 can be stamped and formed by the same set of stamping dies. The molding of the first plate 1 and the second plate 2 only requires two sizes of stamping dies, which is convenient for the manufacture of the heat exchanger 100 and helps save manufacturing costs, and is convenient for the molding of the first plate 1 and the second plate 2. Of course, in other embodiments, h1=h3, h1 may not be equal to H1 or H3, h2=h4, h2 may not be equal to H2 or H4. In other embodiments, the first reinforcing portion 17 and the fourth reinforcing portion 27 may also be bonded and fixed, and the second reinforcing portion 18 and the third reinforcing portion 26 may also be bonded and fixed.

[0056] In other embodiments, the fifth height h1 of the first reinforcement portion 17 from the first plate surface 14 is less than the sixth height h2 of the second reinforcement portion 18 from the first plate surface 14, the seventh height h4 of the fourth reinforcement portion 27 from the second plate surface 23 is less than the eighth height h3 of the third reinforcement portion 26 from the second plate surface 23, the first height h1 of the first reinforcement portion 17 from the first plate surface 14 may not be equal to the eighth height h3 of the third reinforcement portion 26 from the second plate surface 23, and the sixth height h2 of the second reinforcement portion 18 from the first plate surface 14 may not be equal to the seventh height h4 of the fourth reinforcement portion 27 from the second plate surface 23. For example, the fifth height h1 of the first reinforcement part 17 from the first plate surface 14 can be greater than the eighth height h3 of the third reinforcement part 26 from the second plate surface 23, the sixth height h2 of the second reinforcement part 18 from the first plate surface 14 is less than the seventh height h4 of the fourth reinforcement part 27 from the second plate surface 23, the first reinforcement part 17 and the fourth reinforcement part 27 are welded and fixed, and the second reinforcement part 18 and the third reinforcement part 26 are welded and fixed, which can also increase the welding strength of the heat exchanger 100.

[0057] In other embodiments, the fifth height h1 of the first reinforcing portion 17 from the first plate surface 14 may not be equal to the eighth height h3 of the third reinforcing portion 26 from the second plate surface 23, and the sixth height h2 of the second reinforcing portion 18 from the first plate surface 14 may not be equal to the seventh height h4 of the fourth reinforcing portion 27 from the second plate surface 23. For example, the fifth height h1 of the first reinforcing portion 17 from the first plate surface 14 may be the same as the sixth height h2 of the second reinforcing portion 18 from the first plate surface 14, the eighth height h3 of the third reinforcing portion 26 from the second plate surface 23 is the same as the eighth height h3 of the third reinforcing portion 26 from the second plate surface 23, the first reinforcing portion 17 and the fourth reinforcing portion 27 are welded and fixed, and the second reinforcing portion 18 and the third reinforcing portion 26 are welded and fixed, which can also increase the welding strength of the heat exchanger 100. There is no specific limitation on the heights of the first reinforcement part 17 , the fourth reinforcement part 27 , the second reinforcement part 18 and the third reinforcement part 26 , as long as the first reinforcement part 17 and the fourth reinforcement part 27 can be welded and fixed, and the second reinforcement part 18 and the third reinforcement part 26 can be welded and fixed, the purpose of increasing the strength of the heat exchanger 100 can be achieved.

[0058] In other embodiments, only the first corner hole area 022 or the second corner hole area 023 of the first plate 1 may be provided with the first reinforcement part 17 and the second reinforcement part 18, and the second plate 2 may be provided with the fourth reinforcement part 27 matched with the first reinforcement part 17 and the third reinforcement part 26 matched with the second reinforcement part 18. In other embodiments, the first corner hole area 022 and the second corner hole area 023 of the first plate 1 may be provided with only the first reinforcement part 17, and the second plate 2 may be provided with the fourth reinforcement part 27 matched with the first reinforcement part 17; or the first corner hole area 022 and the second corner hole area 023 of the first plate 1 may be provided with only the second reinforcement part 18, and the second plate 2 may be provided with the third reinforcement part 26 matched with the second reinforcement part 18. In this way, the strength effect of the heat exchanger 100 may be increased. In this embodiment, the first protrusion 11, the second protrusion 12, the third protrusion 21 and the fourth protrusion 22 are point waves. In other embodiments, the first protrusion 11, the second protrusion 12, the third protrusion 21 and the fourth protrusion 22 may also be herringbone waves.

[0059] Combination Figure 13-Figure 15 In another embodiment of the heat exchanger 100, α is 0°, β is -90°, that is, the first direction is parallel to the length direction of the heat exchanger 100, and the second direction is parallel to the width direction of the heat exchanger 100. In this embodiment, a plurality of first protrusions 11 and a plurality of second protrusions 12 are alternately arranged along the length direction of the first plate 1, and a plurality of first protrusions 11 and a plurality of second protrusions 12 are alternately arranged along the width direction of the first plate 1. The fourth protrusion 22 is arranged parallel to and opposite to the first protrusion 11, and the third protrusion 21 and the second protrusion 12 are arranged parallel to and opposite to each other, that is, the fourth protrusion 22 and the third protrusion 21 are alternately arranged along the width direction of the second plate 2, and the fourth protrusion 22 and the third protrusion 21 are alternately arranged along the width direction of the second plate 2, the fourth protrusion 22 and the first protrusion 11 are welded and fixed, and the third protrusion 21 and the second protrusion 12 are welded and fixed, which can also improve the heat exchange effect of the heat exchanger 100.

[0060] In another embodiment, the first direction and the length direction of the first plate form an angle α, α is 15° to 75°, and the second direction and the length direction of the first plate form an angle β, β is -75° to -15°. The first protrusion 11 and the second protrusion 12 are alternately arranged along the length direction of the first plate 1, and the first protrusion 11 and the second protrusion 12 are alternately arranged along the width direction of the first plate 1, and at the same time, the first protrusion 11 and the second protrusion 12 are alternately arranged along the first direction, and the first protrusion 11 and the second protrusion 12 are alternately arranged along the second direction. The fourth protrusion 22 is arranged opposite to the first protrusion 11 and fixed by welding, and the third protrusion 21 is arranged opposite to the second protrusion 12 and fixed by welding, which can also improve the heat exchange effect of the heat exchanger 100.

[0061] In other embodiments, the height of part of the second protrusion 12 may be equal to H2, and the part of the second protrusion 12 may be welded and fixed to the third protrusion 21 arranged opposite to the part of the second protrusion 12, and the height of another part of the second protrusion 12 may be less than H2, and there may be a gap between the other part of the second protrusion 12 and the third protrusion 21 arranged opposite to the part of the second protrusion 12; the height of part of the fourth protrusion 22 may be equal to H4, and the part of the fourth protrusion 22 may be welded and fixed to the first protrusion 11 arranged opposite to the part of the fourth protrusion 22, and the height of another part of the fourth protrusion 22 may be less than H4, and there may be a gap between the other part of the fourth protrusion 22 and the first protrusion 11 arranged opposite to the part of the fourth protrusion 22, which may also improve the heat exchange effect of the heat exchanger 100.

[0062] In other embodiments, the height of part of the second protrusion 12 may be equal to H2, and the part of the second protrusion 12 may be welded and fixed to the third protrusion 21 arranged opposite to the part of the second protrusion 12, and the height of another part of the second protrusion 12 may be less than H2, and there is a gap between the other part of the second protrusion 12 and the third protrusion 21 arranged opposite to the part of the second protrusion 12; or, the height of part of the fourth protrusion 22 may be equal to H4, and the part of the fourth protrusion 22 may be welded and fixed to the first protrusion 11 arranged opposite to the part of the fourth protrusion 22, and the height of another part of the fourth protrusion 22 may be less than H4, and there is a gap between the other part of the fourth protrusion 22 and the first protrusion 11 arranged opposite to the part of the fourth protrusion 22.

[0063] Combination Figure 16-Figure 17, indicating a second embodiment of the heat exchanger 100, a plurality of first protrusions 11 and a plurality of second protrusions 12 are alternately arranged along the length direction of the heat exchanger 100, a plurality of fourth protrusions 22 and a plurality of third protrusions 21 are alternately arranged along the length direction of the heat exchanger 100, the first protrusions 11 and the fourth protrusions 22 are arranged oppositely and fixed by welding, and the second protrusions 12 and the third protrusions 21 are arranged oppositely and fixed by welding. In this embodiment, a plurality of first protrusions 11 are arranged along the width direction of the heat exchanger 100, and a plurality of second protrusions 12 are arranged along the width direction of the heat exchanger 100. In this embodiment, along the length direction of the heat exchanger 100, there is a second protrusion 12 between adjacent first protrusions 11, a plurality of first protrusions 11 are arranged roughly in a straight line along the width direction of the heat exchanger 100, there is no second protrusion 12 between two adjacent first protrusions 11, and the first protrusions 11 are arranged in a plurality of straight lines, and the straight line arrangement means that the lines connecting the center points of the plurality of first protrusions 11 are in the same straight line. A plurality of second protrusions 12 are arranged along the width direction of the heat exchanger 100, and there is no first protrusion 11 between two adjacent second protrusions 12 along the width direction of the heat exchanger 100. The fourth protrusion 22 and the first protrusion 11 are arranged in parallel and opposite to each other, the third protrusion 21 and the second protrusion 12 are arranged opposite to each other, the fourth protrusion 22 and the first protrusion 11 are welded and fixed, and the third protrusion 21 and the second protrusion 12 are welded and fixed, which can also improve the heat exchange effect of the heat exchanger 100.

[0064] Combination Figure 18-Figure 19 , indicating a third embodiment of the heat exchanger 100, a plurality of first protrusions 11 and a plurality of second protrusions 12 are alternately arranged along the width direction of the heat exchanger 100, a plurality of fourth protrusions 22 and a plurality of third protrusions 21 are alternately arranged along the width direction of the heat exchanger 100, the first protrusions 11 and the fourth protrusions 22 are arranged oppositely and fixed by welding, and the second protrusions 12 and the third protrusions 21 are arranged oppositely and fixed by welding. In this embodiment, along the width direction of the heat exchanger 100, there is a second protrusion 12 between adjacent first protrusions 11, the first protrusions 11 are arranged along the length direction of the heat exchanger 100, and there is no second protrusion 12 between adjacent first protrusions 11 along the length direction of the heat exchanger 100. The second protrusions 12 are arranged along the length direction of the heat exchanger 100, and there is no first protrusion 11 between adjacent second protrusions 12 along the length direction of the heat exchanger 100. The fourth protrusion 22 and the first protrusion 11 are arranged opposite to each other and fixed by welding, and the third protrusion 21 and the second protrusion 12 are arranged opposite to each other and fixed by welding, which can also improve the heat exchange effect of the heat exchanger 100.

[0065] The arrangement of the first protrusions 11 and the second protrusions 12 in the above different embodiments can be combined. In other embodiments, the first protrusions 11 and the second protrusions 12 may not be arranged regularly, the third protrusion 21 and the second protrusion 12 are arranged opposite to each other and fixed by welding, and the fourth protrusion 22 and the first protrusion 11 are arranged opposite to each other and fixed by welding.

[0066] The arrangement of the first protrusion 11 and the second protrusion 12 is not limited to the above embodiment. The third protrusion 21 and the second protrusion 12 are arranged relatively and fixedly connected, and the first protrusion 11 and the fourth protrusion 22 are arranged relatively and fixedly connected, which are all within the protection scope of the present application.

[0067] In order to improve the heat exchange effect of the heat exchanger 100, the first plate 1 can also be provided with a first dividing rib (not shown in the figure), and the second plate 2 can also be provided with a second dividing rib (not shown in the figure), so that the cooling oil and the coolant flow in a U-shaped loop, increasing the flow path of the cooling oil and the coolant, and improving the heat exchange effect of the heat exchanger 100.

[0068] It should be noted that: It should be noted that: the above embodiments are only used to illustrate the present application and are not intended to limit the technical solutions described in the present application. Although this specification has described the present application in detail with reference to the above embodiments, ordinary technicians in the field should understand that technicians in the relevant technical field can still modify or replace the application with equivalents, and all technical solutions and improvements that do not depart from the spirit and scope of the present application should be included in the scope of the claims of the present application.

Claims

1. A heat exchanger (100), characterized in that: The heat exchanger (100) comprises 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) comprises a plurality of first protrusions (11) and a plurality of second protrusions (12), wherein the first protrusions (11) and the second protrusions (12) protrude toward the second plate (2), and along the height direction of the heat exchanger (100), the height of the first protrusion (11) is greater than the height of the second protrusion (12), and the second plate (2) comprises a plurality of third protrusions (21) and a plurality of fourth protrusions (22), wherein the third protrusions ( The third protrusion (21) and the fourth protrusion (22) protrude toward the first plate (1), and along the height direction of the heat exchanger (100), the height of the third protrusion (21) is greater than the height of the fourth protrusion (22), and the wall forming the first inter-plate channel (S1) includes the first protrusion (11), the second protrusion (12), the third protrusion (21) and the fourth protrusion (22), at least part of the first protrusion (11) and at least part of the fourth protrusion (22) are fixedly connected, and at least part of the second protrusion (12) and at least part of the third protrusion (21) are fixedly connected.

2. The heat exchanger (100) according to claim 1, characterized in that: The first plate (1) comprises a first substrate (16), the first substrate (16) comprises a first plate surface (14), a first height H1 of the first protrusion (11) from the first plate surface (14) is greater than a second height H2 of the second protrusion (12) from the first plate surface (14), the second plate (2) comprises a second substrate (25), the second substrate (25) comprises a second plate surface (23), and a third height H3 of the third protrusion (21) from the second plate surface (23) is greater than a fourth height H4 of the fourth protrusion (22) from the second plate surface (23).

3. The heat exchanger (100) according to claim 1 or 2, characterized in that: The heat exchanger (100) comprises a plurality of plates (A), wherein the plates (A) comprise a first plate (1) and a second plate (2), wherein the plate (A) comprises a heat exchange area (021), wherein the first protrusion (11) and the second protrusion (12) are located in the heat exchange area (021) of the first plate (1), and wherein the third protrusion (21) and the fourth protrusion (22) are located in the heat exchange area (021) of the second plate (2).

4. The heat exchanger (100) according to claim 3, characterized in that: A first direction is defined, a plurality of the first protrusions (11) and a plurality of the second protrusions (12) are alternately arranged along the first direction, a plurality of the fourth protrusions (22) and a plurality of the third protrusions (21) are alternately arranged along the first direction, the first protrusion (11) and the fourth protrusion (22) are arranged opposite to each other and fixedly connected, and the second protrusion (12) and the third protrusion (21) are arranged opposite to each other and fixedly connected; And / or, a second direction is defined, a plurality of the first protrusions (11) and a plurality of the second protrusions (12) are alternately arranged along the second direction, a plurality of the fourth protrusions (22) and a plurality of the third protrusions (21) are alternately arranged along the second direction, the first protrusion (11) and the fourth protrusion (22) are arranged opposite to each other and fixedly connected, and the second protrusion (12) and the third protrusion (21) are arranged opposite to each other and fixedly connected.

5. The heat exchanger (100) according to claim 3 or 4, characterized in that: A plurality of the first protrusions (11) and a plurality of the second protrusions (12) are alternately arranged along the length direction of the heat exchanger (100), a plurality of the first protrusions (11) are arranged along the width direction of the heat exchanger (100), a plurality of the second protrusions (12) are arranged along the width direction of the heat exchanger (100), a plurality of the fourth protrusions (22) and a plurality of the third protrusions (21) are alternately arranged along the length direction of the heat exchanger (100), the first protrusions (11) and the fourth protrusions (22) are arranged opposite to each other and fixedly connected, and the second protrusions (12) and the third protrusions (21) are arranged opposite to each other and fixedly connected; Alternatively, a plurality of the first protrusions (11) and a plurality of the second protrusions (12) are alternately arranged along the width direction of the heat exchanger (100), the first protrusions (11) are arranged along the length direction of the heat exchanger (100), the second protrusions (12) are arranged along the length direction of the heat exchanger (100), a plurality of the fourth protrusions (22) and a plurality of the third protrusions (21) are alternately arranged along the width direction of the heat exchanger (100), the first protrusions (11) and the fourth protrusions (22) are arranged opposite to each other and fixedly connected, and the second protrusions (12) and the third protrusions (21) are arranged opposite to each other and fixedly connected.

6. The heat exchanger (100) according to claim 4, characterized in that: The angle between the first direction and the length direction of the first plate (1) is α, and the angle between the second direction and the length direction of the first plate (1) is β; The α is 15° to 75°, and the β is -75° to -15°; Alternatively, the α is 0° and the β is -90°.

7. The heat exchanger (100) according to claim 4, 5 or 6, characterized in that: The first top portion (111) of the first protrusion (11) and the fourth top portion (221) of the fourth protrusion (22) are welded and fixed, and the second top portion (121) of the second protrusion (12) and the third top portion (211) of the third protrusion (21) are welded and fixed; The first top (111) of the first protrusion (11) is planar, the fourth top (221) of the fourth protrusion (22) is planar, the second top (121) of the second protrusion (12) is planar, and the third top (211) of the third protrusion (21) is planar; Alternatively, the first top (111) of the first protrusion (11) is planar, the fourth top (221) of the fourth protrusion (22) is curved, the second top (121) of the second protrusion (12) is planar, and the third top (211) of the third protrusion (21) is curved; Alternatively, the first top (111) of the first protrusion (11) is curved, the fourth top (221) of the fourth protrusion (22) is curved, the second top (121) of the second protrusion (12) is curved, and the third top (211) of the third protrusion (21) is curved.

8. The heat exchanger (100) according to claim 7, characterized in that: The first substrate (16) comprises a third plate surface (13), the outer diameter of the first protrusion (11) is greater than the outer diameter of the second protrusion (12), and the area of ​​the opening of the first protrusion (11) on the third plate surface (13) side is greater than the area of ​​the opening of the second protrusion (12) on the third plate surface (13) side; And / or, the second substrate (25) includes a fourth plate surface (24), the outer diameter of the third protrusion (21) is greater than the outer diameter of the fourth protrusion (22), and the area of ​​the opening of the third protrusion (21) on the side of the fourth plate surface (24) is greater than the area of ​​the opening of the fourth protrusion (22) on the side of the fourth plate surface (24); The heat exchanger (100) further comprises a plurality of the first plates (1) and a plurality of the second plates (2), wherein the first plates (1) and the second plates (2) are stacked, a first inter-plate channel (S1) is provided between the first plate (1) and one of the second plates (2) adjacent thereto, and a second inter-plate channel (S2) is provided between the first plate (1) and another of the second plates (2) adjacent thereto, and the heat exchanger (100) comprises a fin (3), wherein the fin (3) is located in the second inter-plate channel (S2), and the fin (3) comprises a first end face (31) and a second end face (32), wherein the first end face (31) and the second end face (32) are arranged opposite to each other, the first end face (31) and the fourth plate face (24) of the second plate (2) are fixedly connected, and the second end face (32) and the third plate face (13) of the first plate (1) are fixedly connected.

9. The heat exchanger (100) according to claim 8, characterized in that: The plate (A) comprises a first angular hole area (022) and a second angular hole area (023); along the length direction of the heat exchanger (100), the first angular hole area (022) and the second angular hole area (023) are respectively close to two ends of the heat exchanger (100); the heat exchange area (021) is located between the first angular hole area (022) and the second angular hole area (023); the first plate (1) further comprises a first reinforcement part (17) and a second reinforcement part (18); the first reinforcement part (17) and the second reinforcement part (18) are The first reinforcing portion (18) is located in the first corner hole area (022), the first reinforcing portion (17) and the second reinforcing portion (18) are located in the second corner hole area (023), the first reinforcing portion (17) and the second reinforcing portion (18) protrude toward the second plate (2), the second plate (2) includes a fourth reinforcing portion (27) arranged opposite to and fixedly connected to the first reinforcing portion (17), and the second plate (2) also includes a third reinforcing portion (26) arranged opposite to and fixedly connected to the second reinforcing portion (18).

10. The heat exchanger (100) according to claim 9, characterized in that: A first height H1 of the first protrusion (11) from the first plate surface (14) is equal to a third height H3 of the third protrusion (21) from the second plate surface (23), and a second height H2 of the second protrusion (12) from the first plate surface (14) is equal to a fourth height H4 of the fourth protrusion (22) from the second plate surface (23).

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