Heat exchanger, heat exchange system and vehicle

Abstract

The utility model discloses a heat exchanger, a heat exchange system and a vehicle. The heat exchanger comprises heat exchange fins and a plurality of heat exchange pipes which are arranged in a stacked mode. The heat exchange fins connected with the two heat exchange pipes in a heat conduction mode are arranged between every two adjacent heat exchange pipes, each heat exchange fin comprises a first section and a second section which are arranged in the axial direction of the corresponding heat exchange pipe, the density of the first section is smaller than that of the second section, and the density of the second section is smaller than that of the first section in the axial direction of the corresponding heat exchange pipe. And the first section is closer to the end part of the heat exchange tube than the second section. According to the heat exchanger, the heat exchange coefficient and heat exchange capacity of the heat exchanger and an outer side medium are improved, heat exchange is uniform, and flowing resistance is small.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange, in particular to a heat exchanger, a heat exchange system and a vehicle. Background Art

[0002] In the related art, in order to improve the heat exchange efficiency of the heat exchanger, heat exchange fins are arranged on the surface of the heat exchanger to increase the heat exchange area with the air. However, the heat exchange efficiency of the fins is not taken into consideration, and there is a problem that the heat exchange area of ​​the heat exchange fins is not fully utilized. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the related art.

[0004] The utility model also provides a heat exchange system having the heat exchanger.

[0005] The utility model also provides a vehicle with the heat exchanger.

[0006] The heat exchanger of the first aspect of the utility model comprises: heat exchange fins and a plurality of heat exchange tubes arranged in a stacked manner; the heat exchange fins thermally connected to the two heat exchange tubes are arranged between two adjacent heat exchange tubes, the heat exchange fins comprise a first section and a second section arranged along the axial direction of the heat exchange tube, the density of the first section is less than the density of the second section, wherein, along the axial direction of the heat exchange tube, the first section is closer to the end of the heat exchange tube than the second section.

[0007] In the heat exchanger of the embodiment of the utility model, a heat exchange fin connected to the two heat exchange tubes is arranged between two adjacent heat exchange tubes, and the density of the second section of the heat exchange fin is greater than the density of the first section closer to the end of the heat exchange tube than the second section. In this way, the farther away from the end of the heat exchange tube, the greater the density of the heat exchange fin, and the medium outside the heat exchanger and the heat exchange fin can be fully utilized for heat exchange, thereby improving the heat exchange coefficient and heat exchange amount, and the heat exchange is uniform and the flow resistance is small.

[0008] In some embodiments, the heat exchange fin further includes a third section, the density of the second section is less than that of the third section, wherein along the axial direction of the heat exchange tube, the second section is closer to the end of the heat exchange tube than the third section.

[0009] In some embodiments, the heat exchange fins include a plurality of convective heat exchange plates spaced apart along the axial direction of the heat exchange tube, the convective heat exchange plates are inclined relative to the axial direction of the heat exchange tube, and the density of the convective heat exchange plates in the first section is less than the density of the convective heat exchange plates in the second section.

[0010] In some embodiments, the fin includes a first countercurrent heat exchange plate and a second countercurrent heat exchange plate arranged adjacent to each other, the first countercurrent heat exchange plate is inclined from bottom to top toward one end of the heat exchange tube, and the second countercurrent heat exchange plate is inclined from bottom to top toward the other end of the heat exchange tube.

[0011] In some embodiments, the acute angle formed by the convective heat exchange plate of the first section and the axial direction of the heat exchange tube is smaller than the acute angle formed by the convective heat exchange plate of the second section and the axial direction of the heat exchange tube.

[0012] In some embodiments, the heat exchange fin further includes a connecting surface, and one connecting surface connects two adjacent countercurrent heat exchange plates.

[0013] In some embodiments, protrusions are provided on the surface of the countercurrent heat exchange plate.

[0014] In some embodiments, the shape of the protrusion includes a truncated cone, or the protrusion includes a convex hull with a circular or elliptical bottom surface.

[0015] In some embodiments, the protrusion is a convex hull with a circular bottom surface, and the diameter D of the bottom surface is ≥ 2 mm.

[0016] In some embodiments, the height of the protrusion is H, 0.05mm≤H≤0.15mm.

[0017] In some embodiments, the heat exchange tube includes a plurality of microchannels.

[0018] In some embodiments, the heat exchange tube includes a hollow tube body and a dividing bar inside the body, wherein the dividing bar divides the interior of the tube body into the plurality of microchannels.

[0019] In some embodiments, the cross-sectional shape of the heat exchange tube is a racetrack shape or an elliptical shape.

[0020] In some embodiments, the heat exchanger includes two headers, one end of the heat exchange tube is connected to one of the two headers, and the other end of the heat exchange tube is connected to the other of the two headers.

[0021] In some embodiments, the cross-sectional shape of the collecting tube is circular, rectangular, or a combination of the two.

[0022] In some embodiments, the collecting pipe is provided with an opening for connecting with the heat exchange tube.

[0023] The heat exchange system of the second embodiment of the utility model comprises the heat exchanger of the first embodiment of the utility model.

[0024] The vehicle of the third embodiment of the utility model comprises the heat exchanger of the first embodiment of the utility model or the heat exchange system of the second embodiment of the utility model.

[0025] The vehicle of the embodiment of the utility model can, to a certain extent, solve the problem of uneven heat exchange caused by uneven flow in the front cabin and improve the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 This is an overall schematic diagram of a heat exchanger according to an embodiment of the utility model;

[0028] Figure 2 This is an overall front view of a heat exchanger according to an embodiment of the utility model;

[0029] Figure 3 for Figure 2 A magnified schematic diagram of part A;

[0030] Figure 4 for Figure 3 A magnified schematic diagram of part B;

[0031] Figure 5 for Figure 3 A magnified schematic diagram of part C;

[0032] Figure 6 A side view of a heat exchange tube of a heat exchanger according to an embodiment of the utility model;

[0033] Figure 7 A schematic diagram of a header of a heat exchanger according to an embodiment of the utility model;

[0034] Figure 8 for Figure 7 Enlarged schematic diagram of part E in the middle.

[0035] Reference numerals:

[0036] Heat exchanger 100,

[0037] Collector 1, opening slot 13,

[0038] Heat exchange tube 3, tube body 31, partition bar 32,

[0039] Heat exchange fin 4, connecting surface 41, convection heat exchange plate 42, first convection heat exchange plate 421, second convection heat exchange plate 422, protrusion 43, heat exchange air duct 44,

[0040] Heat exchange medium inlet pipe 5, heat exchange medium outlet pipe 6, upper guard plate 7, lower guard plate 8. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0042] A heat exchanger 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0043] like Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, the heat exchanger 100 includes heat exchange fins 4 and a plurality of heat exchange tubes 3 arranged in a stacked manner; Figure 3 As shown, a heat exchange fin 4 thermally connected to the two heat exchange tubes 3 is arranged between two adjacent heat exchange tubes 3, and the heat exchange fin 4 includes a first section L1 and a second section L2 arranged along the axial direction X of the heat exchange tube 3, and the density of the first section L1 is less than the density of the second section L2, wherein, along the axial direction X of the heat exchange tube 3, the first section L1 is closer to the end of the heat exchange tube 3 than the second section L2.

[0044] In the heat exchanger 100 of the present application, the heat exchange medium in the heat exchange tube 3 exchanges heat with the outside through the heat exchange tube 3, and the heat exchange tube 3 exchanges heat with the outside air through the heat exchange fins 4 thermally connected to the heat exchange tube 3, thereby realizing heat exchange between the heat exchange medium in the heat exchange tube 3 and the outside.

[0045] In the related art, a fan is usually used to drive the airflow to exchange heat with the heat exchanger 100, which easily leads to uneven air volume flowing through the heat exchanger 100, and often results in a situation where the air volume in the middle is large and the air volume at both ends is small. For example, in order to ensure that the airflow and the heat exchanger 100 can fully exchange heat, the middle position of the airflow often flows through the middle position of the heat exchanger 100, which results in a large air volume in the middle of the airflow flowing through the heat exchanger 100 and a small air volume at both ends.

[0046] In the present application, the density of the heat exchange fins 4 located in the middle of the heat exchange tube 3 is greater than the density of the heat exchange fins 4 near the end of the heat exchange tube 3, and the closer to the end of the heat exchange tube 3, the smaller the density of the heat exchange fins 4. In this way, the heat exchange area of ​​the heat exchange fins 4 in the middle position with a large air volume can be larger, so that the middle position of the heat exchange tube 3 can more fully exchange heat with the outer medium through the heat exchange fins 4, thereby improving the heat exchange coefficient and heat exchange amount of the heat exchanger 100 and improving the heat exchange efficiency.

[0047] Moreover, in the present application, the air volume near the end of the heat exchange tube 3 is small, and the density of the heat exchange fins 4 arranged near the end of the heat exchange tube 3 is correspondingly smaller, which can reduce the cost of the heat exchange fins 4 without basically affecting the heat exchange amount.

[0048] The heat exchange fins 4 include a plurality of convection heat exchange plates 42 disposed between two adjacent heat exchange tubes 3. A heat exchange air duct 44 is formed between two adjacent convection heat exchange plates 42. The airflow flowing through each heat exchange air duct 44 exchanges heat with the convection heat exchange plates 42 on both sides.

[0049] The density of the heat exchange fins 4 can be understood as the number of the countercurrent heat exchange plates 42 arranged on the heat exchange tube 3 per unit length along the axial direction X of the heat exchange tube 3 .

[0050] For example Figure 3 In the embodiment, an inclined convection heat exchange plate 42 is provided between the upper and lower heat exchange tubes 3. Figure 3 It can be seen from the figure that the density of the convection heat exchange plate 42 in the first section L1 is less than the density of the convection heat exchange plate 42 in the second section L2.

[0051] In some possible embodiments, the cross section of the heat exchange fin 4 along the axial direction X of the heat exchange tube 3 is wavy, and the heat exchange fin 4 includes a first section L1 and a second section L2 along the axial direction X of the heat exchange tube 3, the first section L1 is closer to the end of the heat exchange tube 3 than the second section L2, and the wavelength of the first section L1 is greater than the wavelength of the second section L2. In this way, the closer to the middle position of the heat exchange tube 3, the smaller the wavelength of the wavy cross section of the heat exchange fin 4, and the convection heat exchange plates 42 of the heat exchange fin 4 are arranged more densely, so that the middle part of the heat exchanger 100 can be better heat-exchanged more fully through the heat exchange fin 4.

[0052] Optionally, the heat exchange performance of the heat exchanger 100 can also be changed by adjusting the number of layers of the heat exchange tubes 3 and the heat exchange fins 4. The more layers of the heat exchange tubes 3 and the heat exchange fins 4, the larger the heat exchange area of ​​the convection heat exchange plates 42 of the heat exchange fins 4, thereby improving the heat exchange coefficient and heat exchange amount of the heat exchanger 100; however, the increase in the number of layers of the heat exchange tubes 3 and the heat exchange fins 4 will affect the air circulation resistance, so it is necessary to balance the relationship between the heat exchange capacity and the circulation resistance to determine the number of layers of the heat exchange tubes 3 and the heat exchange fins 4.

[0053] like Figure 3 As shown, in some possible embodiments according to the present invention, the heat exchange fin 4 further includes a third section L3, and the density of the second section L2 is less than that of the third section L3, wherein along the axial direction X of the heat exchange tube 3, the second section L2 is closer to the end of the heat exchange tube 3 than the third section L3. In this way, the heat exchange between the medium outside the heat exchanger 100 and the heat exchange fin 4 can be more fully utilized for heat exchange, and the heat exchange fin 4 can be divided into more sections as needed to ensure that the density is smaller closer to the end of the heat exchange tube 3.

[0054] like Figure 4 As shown, the heat exchange fin 4 includes a plurality of convection heat exchange plates 42 arranged at intervals along the axial direction X of the heat exchange tube 3. The convection heat exchange plates 42 are inclined relative to the axial direction X of the heat exchange tube 3. The density of the convection heat exchange plates 42 in the first section L1 is less than the density of the convection heat exchange plates 42 in the second section L2. Thus, the heat exchanger 100 can perform heat exchange with the external medium through the convection heat exchange plates 42, thereby improving the heat exchange efficiency.

[0055] In some possible embodiments of the utility model, the fin 4 includes a first convection heat exchange plate 421 and a second convection heat exchange plate 422 that are adjacently arranged. The first convection heat exchange plate 421 is inclined from bottom to top toward one end of the heat exchange tube 3, and the second convection heat exchange plate 421 is inclined from bottom to top toward the other end of the heat exchange tube 3, which can increase the heat exchange area and thus improve the heat exchange efficiency.

[0056] like Figure 3 As shown, the acute angle α1 formed by the convection heat exchange plate 42 of the first section L1 and the axial direction X of the heat exchange tube 3 is smaller than the acute angle α2 formed by the convection heat exchange plate 42 of the second section L2 and the axial direction X of the heat exchange tube 3. This ensures that the heat exchange fins 4 have sufficient heat exchange area, and the density is smaller as it is closer to the end of the heat exchange tube 3, so that the medium outside the heat exchanger 100 and the heat exchange fins 4 can be fully utilized for heat exchange, thereby improving the heat exchange coefficient and heat exchange amount.

[0057] like Figure 4 As shown, according to some embodiments of the present invention, the heat exchange fin 4 further includes a connection surface 41, and a connection surface 41 connects two adjacent convection heat exchange plates 42. Thus, the structural strength of the heat exchange fin 4 can be ensured on the basis of considering the heat dissipation efficiency.

[0058] Optionally, the connection surface 41 abuts against the heat exchange tube 3. In this way, the connection surface 41 contacts the heat exchange tube 3 to achieve heat conduction, which can better exchange heat with the heat exchange tube 3 and improve the heat dissipation efficiency of the heat exchange fins 4.

[0059] like Figure 5 As shown, in some optional embodiments, the surface of the countercurrent heat exchange plate 42 is provided with a protrusion 43. The heat exchange area can be increased, the circulation time of air in the countercurrent heat exchange plate 42 can be prolonged, the flow boundary layer and the thermal boundary layer of the air outside the heat exchanger 100 can be destroyed, the thermal resistance can be reduced, and the heat exchange efficiency can be improved. When the heat exchanger 100 is used as an evaporator, it has excellent condensed water discharge performance to ensure that the heat exchange performance is not affected.

[0060] Optionally, the shape of the protrusion 43 may include a truncated cone, or a convex hull with a circular or elliptical bottom surface.

[0061] Optionally, the diameter D of the bottom surface of the circular convex hull is ≥ 2 mm. For example, the diameter D of the bottom surface of the circular convex hull can be, but is not limited to, 2 mm, 3 mm, 3.5 mm, 3.7 mm, or 4.2 mm.

[0062] Optionally, the thickness of the heat exchange fin 4 is 0.15 mm ≥ S ≥ 0.05 mm.

[0063] Optionally, the height of the circular convex hull is 0.15 mm ≥ H ≥ 0.05 mm.

[0064] This can effectively balance the relationship between heat exchange capacity and flow resistance. The size parameters of the circular convex hull generally need to take into account the thickness of the heat exchange fin 4 and the tensile properties of the material.

[0065] like Figure 6 As shown, in some optional embodiments, the heat exchange tube 3 includes a plurality of microchannels, and the microchannel includes a hollow tube body 31 and a partition bar 32 disposed inside the tube body 31. The partition bar 32 divides the inside of the tube body 31 into a plurality of microchannels. This microchannel structure has a simple manufacturing process, occupies a small space, and has a strong heat exchange capacity.

[0066] Optionally, the cross-section of the heat exchange tube 3 is a racetrack shape, or an ellipse with a slightly convex center. The cross-section of the heat exchange tube 3 refers to a cross section perpendicular to the axial direction X of the heat exchange tube 3 .

[0067] like Figure 1 and Figure 2 As shown, in some possible embodiments of the present invention, the heat exchanger 100 further includes two headers 1. One end of the heat exchange tube 3 is connected to one header 1, and the other end of the heat exchange tube 3 is connected to the other header 1. In this way, the connection between the heat exchange tube 3 and the header 1 can be ensured. Optionally, the cross-sectional shape of the header 1 is circular, rectangular, or a combination of the two. The cross-sectional shape of the header 1 refers to the cross-sectional shape perpendicular to the axial direction Y of the header 1.

[0068] like Figure 7 and Figure 8 As shown, in some optional embodiments, the header 1 is provided with an open slot 13 for connecting with the heat exchange tube 3. The open slot 13 facilitates the connection between the header 1 and the heat exchange tube 3, and ensures the structural strength of the heat exchanger 100.

[0069] Optionally, the open slots 13 are arranged at equal intervals on the header 1. The open slots 13 arranged at intervals can ensure that the heat exchange tubes 3 are arranged at equal intervals, which is beneficial to balancing the relationship between the heat exchange capacity and the flow resistance.

[0070] Optionally, the open slots 13 on the headers 1 on both sides of the heat exchanger 100 are aligned one by one, and the two ends of the heat exchange tube 3 are respectively inserted into the open slots 13 on the header 1. In this way, the structural strength of the heat exchanger 100 can be ensured.

[0071] Optionally, the opening slot 13 is an inwardly contracted arc structure, so that when the heat exchange tube 3 is inserted, the effective contact area between the two can be effectively increased, thereby ensuring the welding strength.

[0072] like Figure 1 and Figure 2 As shown, in some possible embodiments, the heat exchanger 100 further includes an upper guard plate 7 and a lower guard plate 8, which are respectively located outside the uppermost heat exchange tube 3 and the lowermost heat exchange tube 3. The upper guard plate 7, the lower guard plate 8 and the heat exchange tube 3 are welded to the inner side of the header 1, which can increase the pressure resistance of the heat exchanger 100, and protect the outermost heat exchange fin 4 from being damaged by pressure and collision, thereby preventing the heat exchanger 100 from deformation.

[0073] In some optional embodiments, the heat exchanger 100 further includes a heat exchange medium inlet pipe 5 and a heat exchange medium outlet pipe 6. The heat exchange medium enters one header 1 through the heat exchange medium inlet pipe 5, flows into another header 1 through the microchannels in the heat exchange tubes 3, and then flows out through the heat exchange medium outlet pipe 6.

[0074] In some possible embodiments of the utility model, the collecting tube 1, the heat exchange tube 3, the heat exchange fin 4, the upper guard plate 7 and the lower guard plate 8 are all made of aluminum alloy materials, wherein the heat exchange tube 3 is extruded by an aluminum alloy tube, and there is a flux of a brazing material coating on the surface of the heat exchange fin 4, and the two are strengthened by overall furnace brazing. The connection method of other components of the heat exchanger 100 is argon arc welding.

[0075] In the present application, the heat exchanger 100 includes heat exchange fins 4 and a plurality of heat exchange tubes 3 arranged in a stacked manner. The density of the heat exchange fins 4 located in the middle of the heat exchange tubes 3 is greater than the density of the heat exchange fins 4 near the ends of the heat exchange tubes 3. The closer to the ends of the heat exchange tubes 3, the smaller the density of the heat exchange fins 4. In this way, the heat exchange area of ​​the heat exchange fins 4 in the middle position with a large air volume can be larger, so that the middle position of the heat exchange tubes 3 can more fully exchange heat with the outer medium through the heat exchange fins 4, thereby improving the heat exchange coefficient and heat exchange amount of the heat exchanger 100 and improving the heat exchange efficiency. Moreover, in the present application, the air volume near the end of the heat exchange tube 3 is small, and the density of the heat exchange fins 4 arranged at the end of the heat exchange tube 3 is correspondingly smaller, so that the cost of the heat exchange fins 4 can be reduced without substantially affecting the heat exchange amount.

[0076] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0077] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0078] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0080] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0081] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A heat exchanger, characterized in that: include: Heat exchange fins and a plurality of stacked heat exchange tubes; a heat exchange fin thermally connected to the two heat exchange tubes is arranged between two adjacent heat exchange tubes, the heat exchange fin comprises a first section and a second section arranged along the axial direction of the heat exchange tube, the density of the first section is less than the density of the second section, wherein, along the axial direction of the heat exchange tube, the first section is closer to the end of the heat exchange tube than the second section.

2. The heat exchanger according to claim 1, characterized in that: The heat exchange fin further includes a third section, the density of the second section is smaller than that of the third section, wherein along the axial direction of the heat exchange tube, the second section is closer to the end of the heat exchange tube than the third section.

3. The heat exchanger according to claim 1, characterized in that: The heat exchange fins include a plurality of countercurrent heat exchange plates spaced apart along the axial direction of the heat exchange tube, the countercurrent heat exchange plates are inclined relative to the axial direction of the heat exchange tube, and the density of the countercurrent heat exchange plates in the first section is less than the density of the countercurrent heat exchange plates in the second section.

4. The heat exchanger according to claim 3, characterized in that The fin includes a first countercurrent heat exchange plate and a second countercurrent heat exchange plate which are adjacently arranged. The first countercurrent heat exchange plate is inclined from bottom to top toward one end of the heat exchange tube, and the second countercurrent heat exchange plate is inclined from bottom to top toward the other end of the heat exchange tube.

5. The heat exchanger according to claim 3, characterized in that: The acute angle formed by the countercurrent heat exchange plate of the first section and the axial direction of the heat exchange tube is smaller than the acute angle formed by the countercurrent heat exchange plate of the second section and the axial direction of the heat exchange tube.

6. The heat exchanger according to claim 3, characterized in that: The heat exchange fin further comprises a connecting surface, and one connecting surface connects two adjacent countercurrent heat exchange plates.

7. The heat exchanger according to claim 3, characterized in that: The surface of the convection heat exchange plate is provided with protrusions.

8. The heat exchanger according to claim 7, characterized in that The shape of the protrusion includes a truncated cone, or the protrusion includes a convex hull with a circular or elliptical bottom surface.

9. The heat exchanger according to claim 7, characterized in that: The protrusion is a convex hull with a circular bottom surface, and the diameter D of the bottom surface is ≥ 2 mm.

10. The heat exchanger according to claim 7, characterized in that The height of the protrusion is H, 0.05mm≤H≤0.15mm.

11. The heat exchanger according to claim 1, characterized in that One of the heat exchange tubes includes a plurality of microchannels.

12. The heat exchanger according to claim 11, characterized in that The heat exchange tube includes a hollow tube body and a partition bar inside the body, wherein the partition bar divides the interior of the tube body into the plurality of microchannels.

13. The heat exchanger according to claim 1, characterized in that The cross-sectional shape of the heat exchange tube is one of a racetrack shape and an ellipse shape.

14. The heat exchanger according to claim 1, characterized in that The heat exchanger comprises two headers, one end of the heat exchange tube is communicated with one of the two headers, and the other end of the heat exchange tube is communicated with the other of the two headers.

15. The heat exchanger according to claim 14, characterized in that The cross-sectional shape of the collecting pipe is circular, rectangular or a combination of the two.

16. The heat exchanger according to claim 14, characterized in that The collecting pipe is provided with an opening for connecting with the heat exchange tube.

17. A heat exchange system, characterized in that: Comprising the heat exchanger according to any one of claims 1-16.

18. A vehicle, characterized in that: The method comprises the heat exchanger according to any one of claims 1 to 16 or the heat exchange system according to claim 17.

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