Flat pipe assembly, heat exchanger, heat management system and automobile

Abstract

The invention belongs to the technical field of automobile heat management, and discloses a flat tube assembly, a heat exchanger, a heat management system and an automobile, the flat tube assembly comprises a flat tube body and an inner fin, and the flat tube body comprises a first inner wall and a second inner wall which are oppositely arranged; the inner fins are provided with first corrugated structures, each first corrugated structure comprises a first wave crest and a first wave trough, the first wave crest abuts against the first inner wall, the first wave trough abuts against the second inner wall, first protruding parts are arranged at the first wave crest, the first protruding parts and the second inner wall are arranged at intervals, and second protruding parts are arranged at the first wave trough. The second protruding part and the first inner wall are arranged at intervals. The first medium channel with the large wet perimeter is divided into more than two first medium sub-channels with the small wet perimeter by the first protruding parts, and the second medium channel with the large wet perimeter is divided into more than two second medium sub-channels with the small wet perimeter by the second protruding parts, so that the effect of reducing the whole wet perimeter in the flat pipe body is achieved. Therefore, the internal circulation resistance of the flat pipe body is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile thermal management, and in particular to a flat tube assembly, a heat exchanger, a thermal management system and an automobile. Background Art

[0002] The heat exchanger in the automotive thermal management system is mainly composed of heat exchange tubes, fins, liquid collecting tubes and inlet and outlet pressure plates. Among them, the heat exchange tube is a very critical core component that directly affects the heat exchange performance of the heat exchanger.

[0003] At present, the flat heat exchange tubes in heat exchangers mainly include two types: porous extrusion molding structure (such as Figure 1 As shown) and the one-piece folding molding structure (as shown Figure 2 Whether it is a heat exchanger using extruded flat tubes or a heat exchanger using integrated folded flat tubes, due to the limitation of the internal structure of the flat tubes, the wetted perimeter inside the flat tubes is large, resulting in large flow resistance inside the flat heat exchange tubes and low heat exchange efficiency.

[0004] Therefore, there is an urgent need to provide a flat tube assembly, a heat exchanger, a thermal management system and a vehicle to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a flat tube assembly to shorten the internal wet circumference of the flat tube, thereby reducing the internal flow resistance of the flat tube, expanding the effective heat exchange area and turbulence, and improving the heat exchange efficiency of the flat tube.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A flat tube assembly, comprising:

[0008] A flat tube body, the flat tube body comprising a first inner wall and a second inner wall arranged opposite to each other;

[0009] The inner fin is provided with a first corrugated structure, the first corrugated structure includes a first wave crest and a first wave trough, the first wave crest abuts against the first inner wall, the first wave trough abuts against the second inner wall, a first protrusion is provided at the first wave crest, the first protrusion is spaced apart from the second inner wall, a second protrusion is provided at the first wave trough, and the second protrusion is spaced apart from the first inner wall.

[0010] Preferably, the number of the first protrusions is at least two, and at least two first protrusions are spaced apart along the width direction of the first wave crest; the number of the second protrusions is at least two, and at least two second protrusions are spaced apart along the width direction of the first wave valley.

[0011] Preferably, a second corrugated structure is provided at the first wave crest, the second corrugated structure includes a second wave crest and a second wave trough, and the second wave trough is the first protrusion; a third corrugated structure is provided at the first wave trough, the third corrugated structure includes a third wave crest and a third wave trough, and the third wave crest is the second protrusion.

[0012] Preferably, the flat tube body includes a first wall body, a second wall body, a third wall body, a first connecting wall, a second connecting wall and two arcuate walls. The second wall body and the third wall body are arranged opposite to the first wall body. One side of the second wall body is connected to the first wall body through an arcuate wall, and the other side of the second wall body is connected to the first connecting wall. One side of the third wall body is connected to the first wall body through another arcuate wall, and the other side of the third wall body is connected to the second connecting wall. The first connecting wall and the second connecting wall are sealed.

[0013] Preferably, the first connecting wall and the second connecting wall both extend toward the first wall body, and a side of the first connecting wall facing the second connecting wall is sealedly connected to a side of the second connecting wall facing the first connecting wall.

[0014] Preferably, the side of the second wall body facing the first wall body and the side of the third wall body facing the first wall body are both the first inner wall, the side of the first wall body facing the second wall body and the third wall body is the second inner wall, and the sides of the first connecting wall and the second connecting wall facing the first wall body are both in contact with the first wave valley.

[0015] Preferably, the first connecting wall and the second connecting wall are sealed and connected to form a connecting portion, the second wall body and the third wall body are symmetrically arranged about the connecting portion, the connecting portion abuts against the first wave valley at the abutting portion of the first wave valley, and the first corrugated structure is symmetrically arranged about the abutting portion.

[0016] Another object of the present invention is to provide a heat exchanger to shorten the internal wet perimeter of the flat tube, thereby reducing the flow resistance inside the flat tube, and to expand the effective heat exchange area, thereby achieving turbulence and improving the heat exchange efficiency of the heat exchanger.

[0017] To achieve this object, the present invention adopts the following technical solutions:

[0018] A heat exchanger comprises fins and the above-mentioned flat tube assembly, wherein the outer wall of the flat tube body is fixedly connected to the fins.

[0019] Another object of the present invention is to provide a thermal management system to shorten the internal wet circumference of the flat tubes of the heat exchanger to reduce the flow resistance inside the flat tubes, and to expand the effective heat exchange area to achieve turbulence and improve the heat exchange efficiency of the heat exchanger, thereby improving the working efficiency of the thermal management system.

[0020] To achieve this object, the present invention adopts the following technical solutions:

[0021] A thermal management system comprises a compressor and the above-mentioned heat exchanger, wherein the inlet or outlet of the compressor is communicated with the flat tube body.

[0022] Another object of the present invention is to provide an automobile, so as to shorten the internal wet circumference of the flat tube of the heat exchanger of the automobile thermal management system, thereby reducing the flow resistance inside the flat tube, and expanding the effective heat exchange area, realizing turbulence, and improving the heat exchange efficiency of the heat exchanger, thereby improving the working efficiency of the automobile thermal management system.

[0023] To achieve this object, the present invention adopts the following technical solutions:

[0024] An automobile comprises a vehicle body and the above-mentioned thermal management system, wherein the thermal management system is installed in the vehicle body.

[0025] Beneficial effects of the present invention:

[0026] The present invention provides a flat tube assembly, a heat exchanger, a thermal management system and an automobile. The flat tube assembly includes a flat tube body and an inner fin. The flat tube body includes a first inner wall and a second inner wall that are arranged opposite to each other. The inner fin is provided with a first corrugated structure, and the first corrugated structure includes a first wave crest and a first wave trough. The first wave crest abuts against the first inner wall to form a first medium channel between the first wave crest and the second inner wall. The first wave trough abuts against the second inner wall to form a second medium channel between the first wave trough and the first inner wall. A first protrusion is provided at the first wave crest, and the first protrusion is spaced apart from the second inner wall to form two or more first medium sub-channels in the first medium channel. A second protrusion is provided at the first wave trough, and the second protrusion is spaced apart from the first inner wall to form two or more second medium sub-channels in the second medium channel. The first protrusion divides the first medium channel with a larger wet perimeter into two or more first medium sub-channels with smaller wet perimeters, and the second protrusion divides the second medium channel with a larger wet perimeter into two or more second medium sub-channels with smaller wet perimeters, thereby reducing the overall wet perimeter inside the flat tube body, thereby reducing the internal flow resistance of the flat tube body. By setting the first protrusion and the second inner wall at intervals, and the second protrusion and the first inner wall at intervals, the first medium channel and the second medium channel both have a larger heat exchange area, thereby achieving the effect of expanding the effective heat exchange area. By setting the first protrusion and the second protrusion, the turbulence of the working medium is achieved, thereby improving the heat exchange efficiency of the working medium inside the flat tube body. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of a multi-hole extrusion-formed flat tube in the prior art;

[0028] Figure 2 It is a schematic diagram of the structure of an integrated folding and forming flat tube in the prior art;

[0029] Figure 3It is a schematic diagram of the structure of the flat tube assembly provided by the present invention;

[0030] Figure 4 This is a front view of the flat tube assembly structure provided by the present invention;

[0031] Figure 5 It is a schematic diagram of the flat tube body structure provided by the present invention;

[0032] Figure 6 It is a schematic diagram of the inner fin structure provided by the present invention.

[0033] In the figure:

[0034] 1. Flat tube body; 11. First inner wall; 12. Second inner wall; 13. First wall body; 14. Second wall body; 15. Third wall body; 16. Connecting portion; 161. First connecting wall; 162. Second connecting wall; 17. Arc-shaped wall; 2. Inner fin; 21. First corrugated structure; 211. First wave crest; 212. First wave valley; 2121. Abutting portion; 2122. First sub-wave valley; 2123. Second sub-wave valley; 213. First protruding portion; 214. Second protruding portion; 22. Second corrugated structure; 221. Second wave crest; 222. Second wave valley; 23. Third corrugated structure; 231. Third wave crest; 232. Third wave valley; 31. First medium channel; 311. First medium sub-channel; 32. Second medium channel; 321. Second medium sub-channel. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0039] The present embodiment provides a flat tube assembly to shorten the internal wetted perimeter of the flat tube, thereby reducing the internal flow resistance of the flat tube, expanding the effective heat exchange area and turbulence, and improving the heat exchange efficiency of the flat tube.

[0040] Specifically, Figure 3 to Figure 4As shown, the flat tube assembly includes a flat tube body 1 and an inner fin 2, the flat tube body 1 includes a first inner wall 11 and a second inner wall 12 arranged opposite to each other; the inner fin 2 is provided with a first corrugated structure 21, the first corrugated structure 21 includes a first wave crest 211 and a first wave valley 212, the first wave crest 211 abuts against the first inner wall 11 to form a first medium channel 31 between the first wave crest 211 and the second inner wall 12, the first wave valley 212 abuts against the second inner wall 12 to form a second medium channel 32 between the first wave valley 212 and the first inner wall 11, a first protrusion 213 is provided at the first wave crest 211, the first protrusion 213 is spaced apart from the second inner wall 12 to form two or more first medium sub-channels 311 in the first medium channel 31, and a second protrusion 214 is provided at the first wave valley 212, the second protrusion 214 is spaced apart from the first inner wall 11 to form two or more second medium sub-channels 321 in the second medium channel 32. The first protrusion 213 divides the first medium channel 31 with a larger wet perimeter into more than two first medium sub-channels 311 with smaller wet perimeters, and the second protrusion 214 divides the second medium channel 32 with a larger wet perimeter into more than two second medium sub-channels 321 with smaller wet perimeters, thereby reducing the overall wet perimeter of the flat tube body 1, thereby reducing the internal flow resistance of the flat tube body 1. By setting the first protrusion 213 and the second inner wall 12 at intervals, and the second protrusion 214 and the first inner wall 11 at intervals, the first medium channel 31 and the second medium channel 32 both have a larger heat exchange area, thereby achieving the effect of expanding the effective heat exchange area. By setting the first protrusion 213 and the second protrusion 214, the turbulence of the working medium is achieved, thereby improving the heat exchange efficiency of the working medium inside the flat tube body 1.

[0041] Further, the number of the first protrusions 213 is at least two, and at least two first protrusions 213 are arranged at intervals along the width direction of the first wave crest 211. The number of the second protrusions 214 is at least two, and at least two second protrusions 214 are arranged at intervals along the width direction of the first wave valley 212. At least two first protrusions 213 divide the first medium channel 31 with a larger wet perimeter into more than three first medium sub-channels 311 with a smaller wet perimeter, and at least two second protrusions 214 divide the second medium channel 32 with a larger wet perimeter into more than three second medium sub-channels 321 with a smaller wet perimeter, further reducing the wet perimeter inside the flat tube body 1. In this embodiment, the number of the first protrusions 213 is 2, and in other embodiments, the number of the first protrusions 213 is 3, 4, or 5, etc. In this embodiment, the number of the second protrusions 214 is 2, and in other embodiments, the number of the second protrusions 214 is 3, 4, or 5, etc. It should be noted that the number of the first protrusions 213 at the first wave crests 211 may be equal or unequal, and the number of the second protrusions 214 at the first wave troughs 212 may be equal or unequal, depending on actual application conditions.

[0042] Furthermore, a second corrugated structure 22 is provided at the first wave crest 211, and the second corrugated structure 22 includes a second wave crest 221 and a second wave valley 222, and the second wave valley 222 is a first protrusion 213; a third corrugated structure 23 is provided at the first wave valley 212, and the third corrugated structure 23 includes a third wave crest 231 and a third wave valley 232, and the third wave crest 231 is a second protrusion 214, thereby dividing the first medium channel 31 into more than two first medium sub-channels 311, and dividing the second medium channel 32 into more than two second medium sub-channels 321, so as to achieve the effect of reducing the overall wet circumference inside the flat tube body 1.

[0043] In this embodiment, the flat tube body 1 is made by a bending process. Specifically, Figure 5 As shown, the flat tube body 1 includes a first wall body 13, a second wall body 14, a third wall body 15, a first connecting wall 161, a second connecting wall 162 and two arc-shaped walls 17. The second wall body 14 and the third wall body 15 are arranged opposite to the first wall body 13. One side of the second wall body 14 is connected to the first wall body 13 through an arc-shaped wall 17, and the other side of the second wall body 14 is connected to the first connecting wall 161. One side of the third wall body 15 is connected to the first wall body 13 through another arc-shaped wall 17, and the other side of the third wall body 15 is connected to the second connecting wall 162. The first connecting wall 161 is sealed with the second connecting wall 162 to achieve a sealed connection of the flat tube body 1.

[0044] Furthermore, both the first connecting wall 161 and the second connecting wall 162 extend toward the first wall body 13, and the side of the first connecting wall 161 facing the second connecting wall 162 is sealedly connected to the side of the second connecting wall 162 facing the first connecting wall 161, so that the connection area between the first connecting wall 161 and the second connecting wall 162 is larger, thereby achieving a better sealing effect inside the flat tube body 1. In this embodiment, the side of the first connecting wall 161 facing the second connecting wall 162 and the side of the second connecting wall 162 facing the first connecting wall 161 are welded and fixed, and in other embodiments, the side of the first connecting wall 161 facing the second connecting wall 162 and the side of the second connecting wall 162 facing the first connecting wall 161 can also be glued and fixed.

[0045] Further, the side of the second wall 14 facing the first wall 13 and the side of the third wall 15 facing the first wall 13 are both the first inner wall 11, the side of the first wall 13 facing the second wall 14 and the third wall 15 is the second inner wall 12, the first connecting wall 161 and the second connecting wall 162 facing the first wall 13 are both in contact with the first trough 212, and the first trough 212 is in contact with the second inner wall 12, thereby achieving the fixation of the inner fin 2 relative to the flat tube body 1. In this embodiment, the inner fin 2 is fixed to the inside of the flat tube body 1 by welding, and in other embodiments, the inner fin 2 can also be fixed to the inside of the flat tube body 1 by bonding.

[0046] Furthermore, the first connecting wall 161 and the second connecting wall 162 are sealed and connected to form a connecting portion 16, the second wall body 14 and the third wall body 15 are symmetrically arranged about the connecting portion 16, the connecting portion 16 abuts against the first wave valley 212 at the abutting portion 2121 of the first wave valley 212, and the first corrugated structure 21 is symmetrically arranged about the abutting portion 2121, thereby realizing convenient folding during the forming process of the flat tube body 1 and error prevention during the assembly process, facilitating the stamping of the inner fin 2 during the production process and error prevention during the assembly process of the inner fin 2 and the flat tube body 1.

[0047] Furthermore, if Figure 6As shown, the first trough 212 includes a first sub-trough 2122 and a second sub-trough 2123, the width of the first sub-trough 2122 is greater than the width of the second sub-trough 2123, the abutment portion 2121 is located in the middle of the first sub-trough 2122, the number of the first crest 211 and the second sub-trough 2123 are both more than two, and illustratively, the number of the first crest 211 can be two, three or four, etc., the number of the second sub-trough 2123 can be two, three or four, etc., and the first crest 211 and the second The number of sub-troughs 2123 may be equal or unequal, all first wave crests 211 are symmetrically arranged about the abutment portion 2121, and all second sub-troughs 2123 are symmetrically arranged about the abutment portion 2121, which realizes the structure that the first corrugated structure 21 is symmetrically arranged about the abutment portion 2121 on the one hand, and on the other hand, the second medium channel 32 corresponding to the first sub-trough 2122 is divided into two by the connecting portion 16, avoiding the problem that the second medium channel 32 still has a long wet perimeter, which affects the circulation of the working medium inside the flat tube body 1. In other embodiments, the width of the first sub-trough 2122 is equal to the width of the second sub-trough 2123, and the abutment portion 2121 is located in the middle of the first sub-trough 2122.

[0048] Optionally, the wave height of the first corrugated structure 21 is h1, and the protrusion heights of the first protrusion 213 and the second protrusion 214 are both h2, that is, the wave heights of the second corrugated structure 22 and the third corrugated structure 23 are both h2, and h2 is 0.2 times to 0.5 times of h1, so as to avoid the protrusion heights of the first protrusion 213 and the second protrusion 214 being too high, resulting in a still high wet perimeter and a still large flow resistance inside the flat tube body 1, and also avoid the protrusion heights of the first protrusion 213 and the second protrusion 214 being too low, resulting in no turbulence in the process of the working medium flowing inside the flat tube body 1. In this embodiment, h2 is 0.5 times of h1, and in other embodiments, h2 is 0.2 times or 0.4 times of h1.

[0049] Optionally, the wave width of the first corrugated structure 21 is w1, and the protrusion widths of the first protrusion 213 and the second protrusion 214 are both w2, that is, the wave widths of the second corrugated structure 22 and the third corrugated structure 23 are both w2, and w1 is 2 to 5 times of w2, so as to avoid the protrusion widths of the first protrusion 213 and the second protrusion 214 being too wide, resulting in the first protrusion 213 and the second protrusion 214 being the same as the first corrugation width, which does not have the effect of disturbing the flow, and to avoid the protrusion widths of the first protrusion 213 and the second protrusion 214 being too narrow, resulting in an increase in the internal wet perimeter of the flat tube body 1, which in turn increases the flow resistance of the working medium inside the flat tube body 1. In this embodiment, w1 is 3 times of w2, and in other embodiments, w1 is 2, 4 or 5 times of w2.

[0050] This embodiment also provides a heat exchanger to shorten the internal wet perimeter of the flat tube, thereby reducing the flow resistance inside the flat tube, and to expand the effective heat exchange area, thereby achieving turbulence and improving the heat exchange efficiency of the heat exchanger.

[0051] Specifically, the heat exchanger includes a fin and the above-mentioned flat tube assembly, and the outer wall of the flat tube body 1 is fixedly connected to the fin. The first protrusion 213 divides the first medium channel 31 with a larger wet perimeter into two or more first medium sub-channels 311 with smaller wet perimeters, and the second protrusion 214 divides the second medium channel 32 with a larger wet perimeter into two or more second medium sub-channels 321 with smaller wet perimeters, so as to reduce the overall wet perimeter inside the flat tube body 1, thereby reducing the internal flow resistance of the flat tube body 1; by arranging the first protrusion 213 and the second inner wall 12 at intervals, and the second protrusion 214 and the first inner wall 11 at intervals, the first medium channel 31 and the second medium channel 32 both have a larger heat exchange area, thereby achieving the effect of expanding the effective heat exchange area; by arranging the first protrusion 213 and the second protrusion 214, the turbulence of the working medium inside the flat tube body 1 is achieved, thereby improving the heat exchange efficiency of the working medium inside the flat tube body 1, and thus making the heat exchanger equipped with the flat tube assembly have a higher heat exchange efficiency. In this embodiment, the outer wall of the flat tube body 1 is welded and fixed to the fins. In other embodiments, the flat tube body 1 is threadedly connected to the fins.

[0052] This embodiment further provides a thermal management system to shorten the internal wet circumference of the flat tubes of the heat exchanger to achieve the effect of reducing the internal flow resistance of the flat tubes, and to expand the effective heat exchange area to achieve turbulence, thereby achieving the effect of improving the heat exchange efficiency of the heat exchanger, thereby improving the working efficiency of the thermal management system.

[0053] Specifically, the thermal management system includes a compressor and the above-mentioned heat exchanger, and the inlet of the compressor is connected to the flat tube body 1. The first protrusion 213 divides the first medium channel 31 with a larger wet perimeter into two or more first medium sub-channels 311 with smaller wet perimeters, and the second protrusion 214 divides the second medium channel 32 with a larger wet perimeter into two or more second medium sub-channels 321 with smaller wet perimeters, so as to reduce the overall wet perimeter inside the flat tube body 1, thereby reducing the internal flow resistance of the flat tube body 1; by arranging the first protrusion 213 and the second inner wall 12 at intervals, and the second protrusion 214 and the first inner wall 11 at intervals, the first medium channel 31 and the second medium channel 32 both have a larger heat exchange area, thereby achieving the effect of expanding the effective heat exchange area; by arranging the first protrusion 213 and the second protrusion 214, the turbulence of the working medium inside the flat tube body 1 is achieved, thereby improving the heat exchange efficiency of the heat exchanger, so that the thermal management system equipped with the heat exchanger also has a higher working efficiency. In other embodiments, the outlet of the compressor is connected to the flat tube body 1.

[0054] The present embodiment further provides an automobile, which shortens the internal wet circumference of the flat tubes of the automobile thermal management system heat exchanger, thereby reducing the flow resistance inside the flat tubes, and expanding the effective heat exchange area to achieve turbulence, thereby improving the heat exchange efficiency of the heat exchanger, thereby improving the working efficiency of the automobile thermal management system.

[0055] Specifically, the automobile includes a vehicle body and the above-mentioned thermal management system, which is installed in the vehicle body. The first protrusion 213 divides the first medium channel 31 with a larger wet perimeter into two or more first medium sub-channels 311 with a smaller wet perimeter, and the second protrusion 214 divides the second medium channel 32 with a larger wet perimeter into two or more second medium sub-channels 321 with a smaller wet perimeter, thereby reducing the overall wet perimeter of the flat tube body 1, thereby reducing the internal flow resistance of the flat tube body 1; by arranging the first protrusion 213 and the second inner wall 12 at intervals, and the second protrusion 214 and the first inner wall 11 at intervals, the first medium channel 31 and the second medium channel 32 both have a larger heat exchange area, thereby achieving the effect of expanding the effective heat exchange area; by arranging the first protrusion 213 and the second protrusion 214, the turbulence of the working medium inside the flat tube body 1 is achieved, thereby improving the heat exchange efficiency of the heat exchanger, and thus the automobile equipped with the thermal management system also has a higher working efficiency.

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A flat tube assembly, characterized in that: include: A flat tube body (1), the flat tube body (1) comprising a first inner wall (11) and a second inner wall (12) arranged opposite to each other; An inner fin (2), wherein the inner fin (2) is provided with a first corrugated structure (21), wherein the first corrugated structure (21) comprises a first wave crest (211) and a first wave trough (212), wherein the first wave crest (211) abuts against the first inner wall (11), and the first wave trough (212) abuts against the second inner wall (12), wherein a first protrusion (213) is provided at the first wave crest (211), and the first protrusion (213) is spaced apart from the second inner wall (12), and a second protrusion (214) is provided at the first wave trough (212), and the second protrusion (214) is spaced apart from the first inner wall (11).

2. The flat tube assembly according to claim 1, characterized in that: The number of the first protrusions (213) is at least two, and at least two of the first protrusions (213) are arranged at intervals along the width direction of the first wave crest (211); the number of the second protrusions (214) is at least two, and at least two of the second protrusions (214) are arranged at intervals along the width direction of the first wave valley (212).

3. The flat tube assembly according to claim 2, characterized in that: A second corrugated structure (22) is provided at the first wave crest (211), the second corrugated structure (22) comprising a second wave crest (221) and a second wave trough (222), the second wave trough (222) being the first protruding portion (213); a third corrugated structure (23) is provided at the first wave trough (212), the third corrugated structure (23) comprising a third wave crest (231) and a third wave trough (232), the third wave crest (231) being the second protruding portion (214).

4. The flat tube assembly according to claim 1, characterized in that: The flat tube body (1) comprises a first wall body (13), a second wall body (14), a third wall body (15), a first connecting wall (161), a second connecting wall (162) and two arc-shaped walls (17); the second wall body (14) and the third wall body (15) are both arranged opposite to the first wall body (13); one side of the second wall body (14) is connected to the first wall body (13) via one of the arc-shaped walls (17); the other side of the second wall body (14) is connected to the first connecting wall (161); one side of the third wall body (15) is connected to the first wall body (13) via another of the arc-shaped walls (17); the other side of the third wall body (15) is connected to the second connecting wall (162); the first connecting wall (161) and the second connecting wall (162) are sealedly connected.

5. The flat tube assembly according to claim 4, characterized in that: The first connecting wall (161) and the second connecting wall (162) both extend in the direction of the first wall body (13), and a side of the first connecting wall (161) facing the second connecting wall (162) is sealedly connected to a side of the second connecting wall (162) facing the first connecting wall (161).

6. The flat tube assembly according to claim 5, characterized in that: The side of the second wall body (14) facing the first wall body (13) and the side of the third wall body (15) facing the first wall body (13) are both the first inner wall (11); the side of the first wall body (13) facing the second wall body (14) and the third wall body (15) are the second inner wall (12); and the sides of the first connecting wall (161) and the second connecting wall (162) facing the first wall body (13) are both in contact with the first wave valley (212).

7. The flat tube assembly according to claim 6, characterized in that: The first connecting wall (161) and the second connecting wall (162) are sealed and connected to form a connecting portion (16); the second wall body (14) and the third wall body (15) are symmetrically arranged with respect to the connecting portion (16); the connecting portion (16) abuts against the first wave valley (212) at the abutting portion (2121) of the first wave valley (212); and the first corrugated structure (21) is symmetrically arranged with respect to the abutting portion (2121).

8. A heat exchanger, characterized in that: It comprises a fin and the flat tube assembly according to any one of claims 1 to 7, wherein the outer wall of the flat tube body (1) is fixedly connected to the fin.

9. A thermal management system, characterized in that: It comprises a compressor and the heat exchanger according to claim 8, wherein the inlet or outlet of the compressor is connected to the flat tube body (1).

10. An automobile, characterized in that: The invention comprises a vehicle body and the thermal management system according to claim 9, wherein the thermal management system is installed in the vehicle body.

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