Heat exchanger and heat exchange unit

Abstract

The utility model provides a heat exchanger and a heat exchange unit. The heat exchanger includes a plurality of flow path tubes. The multiple flow path pipes are arranged at intervals in the arrangement direction, and each flow path pipe comprises N bent sections and N + 1 straight sections. N > = 2. Each bent section is connected with two adjacent straight sections, so that an included angle greater than 0 is formed between the two adjacent straight sections. And the cross section of each flow path pipe is flat. And the thickness direction of each straight section is consistent with the arrangement direction. And each bending section is bent and twisted, so that an included angle greater than 0 is formed between the thickness direction of the bending section and the arrangement direction. According to the heat exchanger, the areas of a plurality of air inlet surfaces are fully utilized, the air resistance is reduced, and the heat exchange efficiency is improved. As no complex connecting pipeline is needed, the cost is low, and the occupied space is small. The bending section is bent and twisted, so that the requirement for the bending radius and the shortest length of the bending section is low, the heat exchanger can have the small size, and therefore the heat exchanger can be applied to a small-size heat exchange unit.

Description

Technical Field

[0001] The present disclosure relates to the technical field of air conditioners, and in particular, to a heat exchanger and a heat exchange unit having the same. Background Art

[0002] A heat exchanger is a device for realizing heat exchange between a fluid medium and air, and is widely used in various scenarios. Typically, a heat exchanger can be applied to an air conditioning system. A heat exchanger generally includes flow path tubes arranged at intervals and fins provided between adjacent flow path tubes. The air flow passing through the fins will exchange heat with the fluid medium flowing in the flow path tubes, thereby achieving the purpose of heat exchange between the fluid medium and air.

[0003] In practical applications, the air flow flows into the heat exchange unit from multiple air inlet surfaces. A single straight heat exchanger cannot make full use of the area of multiple air inlet surfaces, and the heat exchange efficiency is poor. Multiple connected straight heat exchangers require complex connecting pipelines, which are costly and occupy space. If a heat exchanger bent into a shape with multiple straight portions is adopted, the bending radius and the shortest length of the bent portion are large, and it is also difficult to be applied to a small-sized heat exchange unit.

[0004] Therefore, the heat exchangers used in small-sized units in the past have poor heat exchange efficiency and high costs. Summary of the Utility Model

[0005] In view of this, the present disclosure provides a heat exchanger and a heat exchange unit having the same, aiming to solve the problems that the heat exchangers used in small-sized units in the past have poor heat exchange efficiency and high costs.

[0006] The heat exchanger provided by the present disclosure includes a plurality of flow path tubes. The plurality of flow path tubes are arranged at intervals along an arrangement direction, and each flow path tube includes N bending segments and N + 1 straight segments. Here, N ≥ 2. Each bending segment connects two adjacent straight segments, so that the two adjacent straight segments form an angle greater than 0. The cross-section of each flow path tube is flat. The thickness direction of each straight segment is consistent with the arrangement direction. Each bending segment is bent and twisted so that the thickness direction of the bending segment forms an angle greater than 0 with the arrangement direction.

[0007] According to the heat exchanger and heat exchange unit provided by the present disclosure, more than three straight sections of the heat exchanger can respectively face more than three air inlet surfaces of the heat exchange unit, which makes full use of the areas of multiple air inlet surfaces, reduces the wind resistance, and thus improves the heat exchange efficiency. Since there is no need to rely on complex connecting pipelines, the heat exchanger according to the present disclosure has a relatively low cost and relatively small space occupation. Since the bending section is bent and twisted so that the angle between its thickness direction and the arrangement direction is greater than 0, the requirements for the bending radius and the shortest length of the bending section are both small, enabling the heat exchanger provided by the present disclosure to have a small size, and thus can be applied to small-sized heat exchange units. It can be seen that the heat exchanger provided by the present disclosure can be applied to small-sized units, and has high heat exchange efficiency and low cost.

[0008] As a possible implementation manner, each flow path tube has opposite first and second ends, and the flow path tube sequentially includes a first straight section, a second straight section, and a third straight section from the first end to the second end, and the first straight section and the third straight section are arranged opposite to each other.

[0009] According to this structure, when observed from a top view perspective, the heat exchanger will generally be U-shaped, that is, it has three straight sections and one side is open. These three straight sections can respectively face the 3 air inlet surfaces of the heat exchange unit to ensure relatively high heat exchange efficiency. The open side of the heat exchanger 10 can be used to place the pipelines and related devices of the heat exchange unit to ensure that the overall heat exchange unit has a relatively compact structure.

[0010] As a possible implementation manner, each flow path tube further includes a fourth straight section between the third straight section and the second end, and the second straight section and the fourth straight section are arranged opposite to each other.

[0011] In this way, the heat exchanger will have 4 straight sections, and the 4 straight sections respectively face the 4 air inlet surfaces of the heat exchange unit to obtain relatively high heat exchange efficiency.

[0012] As a possible implementation manner, the length of the fourth straight section is shorter than the length of the second straight section.

[0013] According to this structure, when observed from a top view perspective, the heat exchanger will generally be G-shaped. A space will be formed between the fourth straight section and the first straight section, and this space can be used to place the pipelines and related devices of the heat exchange unit to ensure that the overall heat exchange unit has a relatively compact structure.

[0014] As a possible implementation manner, the two adjacent straight sections of each flow path tube form an angle α, and the two non-adjacent straight sections of each flow path tube separated by one straight section form an angle β. Here, the angle α satisfies: 90° ≤ α ≤ 120°, and the angle β satisfies: 0° ≤ β ≤ 60°.

[0015] In this way, each straight section of the heat exchanger will be able to be roughly aligned with the corresponding air inlet surface, thus ensuring a relatively high heat exchange efficiency.

[0016] As a possible implementation, each bending section is bent and twisted such that its top is higher than the top surfaces of two adjacent straight sections along the arrangement direction.

[0017] This configuration of the bending section is conducive to reducing the bending difficulty, decreasing the bending radius and the shortest length, and helping to avoid the flow path within the bending section from being too narrow.

[0018] As a possible implementation, the N + 1 straight sections of multiple flow path tubes together form N + 1 plate-like parts, and the N bending sections of multiple flow path tubes together form N turning parts. Each plate-like part is rectangular, and each turning part is vertically arranged along the arrangement direction.

[0019] The rectangular plate-like part composed of multiple straight sections has a relatively large heat exchange area and a relatively high heat exchange efficiency. The vertically arranged turning parts have relatively small requirements for the bending radius and the shortest length of the bending section, enabling the heat exchanger provided by the present disclosure to have a relatively small size, and thus can be applied to small-sized heat exchange units.

[0020] As a possible implementation, the heat exchanger further includes multiple fins, and the multiple fins are distributed on the N + 1 plate-like parts, and the N turning parts are not provided with fins.

[0021] Since the turning parts are not provided with fins, the requirements for the bending radius and the shortest length of the bending section are relatively small, enabling the heat exchanger provided by the present disclosure to have a relatively small size, and thus can be applied to small-sized heat exchange units.

[0022] As a possible implementation, a fin is provided between two adjacent straight sections of each plate-like part, and the fin extends in a wavy shape along the length directions of the two straight sections.

[0023] This configuration does not require the fin to protrude beyond the flow path tube in the width direction, which helps to reduce the size of the heat exchanger.

[0024] As a possible implementation, each fin extends along the arrangement direction and is provided with multiple fin slots arranged at intervals along the arrangement direction, and the multiple straight sections of each plate-like part respectively pass through the multiple fin slots.

[0025] This kind of fin has the advantage of being relatively convenient to assemble.

[0026] As a possible implementation, it further includes two header pipes, and both ends of each flow path tube are respectively connected to the two header pipes.

[0027] The present disclosure also provides a heat exchange unit, including the heat exchanger provided in the above aspects.

[0028] In one possible implementation, the heat exchanger unit includes two heat exchangers. Each flow path tube of each heat exchanger has opposite first and second ends. Each flow path tube sequentially includes a first straight section, a second straight section, and a third straight section from the first end to the second end. The first straight section and the third straight section are arranged opposite to each other. The two second straight sections of the two heat exchangers are arranged opposite to each other, and the two first straight sections and the two third straight sections of the two heat exchangers are located between the two second straight sections.

[0029] In this way, the two heat exchangers jointly enclose a rectangle, which is beneficial to heat exchange on the four sides of the unit at the same time, thereby further improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] It should be understood that the following drawings only show some embodiments of the present disclosure and should not be regarded as limiting the scope.

[0031] It should be understood that the same or similar reference numerals are used in the drawings to represent the same or similar elements.

[0032] It should be understood that the drawings are only schematic, and the dimensions and ratios of the elements in the drawings are not necessarily accurate.

[0033] Figure 1 Isometric structural schematic diagram of the heat exchanger provided in an embodiment of the present disclosure.

[0034] Figure 2 For Figure 1 Top view structural schematic diagram of the heat exchanger in

[0035] Figure 3 For Figure 1 Structural schematic diagram of the heat exchanger in the unfolded state in

[0036] Figure 4 For Figure 1 Structural schematic diagram of the bent section of the flow path tube of the heat exchanger in

[0037] Figure 5 For Figure 4 Structural schematic diagram of the bent section observed from another perspective in

[0038] Figure 6 For Figure 1 Structural schematic diagram of two adjacent straight sections and the fins therebetween on an air inlet surface of the heat exchanger in

[0039] Figure 7 Isometric structural schematic diagram of the heat exchanger provided in another embodiment of the present disclosure.

[0040] Figure 8 ForFigure 7 The top view structural schematic diagram of the heat exchanger in

[0041] Figure 9 is Figure 7 The structural schematic diagram of the heat exchanger in

[0042] Figure 10 The isometric structural schematic diagram of the heat exchanger provided by another embodiment of the present disclosure.

[0043] Figure 11 is Figure 10 The structural schematic diagram of the fins of the heat exchanger in

[0044] Figure 12 The structural schematic diagram of the heat exchanger unit provided by an embodiment of the present disclosure. Specific embodiments

[0045] Many specific details will be listed below to provide an understanding of the structure, function, and use of the embodiments described in the specification and shown in the drawings. It can be understood that the embodiments described and shown herein are non-limiting examples, so it can be recognized that the specific structural and functional details disclosed herein can be representative and exemplary. Without departing from the scope of the claims, these embodiments can be modified and changed.

[0046] An embodiment of the present disclosure provides a heat exchanger 10, which is shown in Figures 1 to 6 the illustration. The heat exchanger 10 can be applied to various scenarios that require heat exchange. For example, the heat exchanger 10 can be applied to the refrigeration unit or the heating unit of an air conditioning system.

[0047] First, referring to Figures 1 to 3 , the heat exchanger 10 can include a plurality of flow path tubes 11. The plurality of flow path tubes 11 can be arranged at intervals along an arrangement direction, that is, the direction indicated by the arrow X in the figure. Each flow path tube 11 can include N + 1 straight sections 111 and N bending sections 112, where N is greater than or equal to 2. Any two adjacent straight sections 111 can be connected by a bending section, so that any two adjacent straight sections 111 form an angle greater than 0.

[0048] The N + 1 straight sections 11 of the multiple flow path tubes 11 can jointly form N + 1 plate-like parts 101. Each plate-like part 101 can be rectangular. The rectangular plate-like part 101 formed by the multiple straight sections 111 has a large heat exchange area and high heat exchange efficiency. The N bent sections 112 of the multiple flow path tubes 11 can jointly form N turning parts 102. Each turning part 102 can be arranged vertically along the arrangement direction. The vertically arranged turning parts 102 have relatively low requirements for the bending radius and the shortest length of the bent sections 112, enabling the heat exchanger 10 to have a small size, so that it can be applied to small-sized heat exchange units.

[0049] The cross-section of each flow path tube 11 can be flat, for example, elliptical or rectangular. In this way, not only can the resistance of fluid flow be reduced and the flow characteristics of the fluid be improved. As Figure 4 shown, the thickness direction of each straight section 111 (i.e., the direction indicated by the arrow T1 in the figure) is consistent with the arrangement direction X. In this way, the contact area between the straight section 111 and the corresponding fin 12 is large, which helps to improve the heat exchange efficiency.

[0050] Continuing to refer to Figure 4 , each bent section 112 is bent and twisted so that the thickness direction of the bent section (i.e., the direction indicated by the arrow T2 in the figure) forms an angle greater than 0 with the arrangement direction X. An angle with the arrangement direction. As can be seen from Figure 4 , the thickness directions T1 of the two straight sections 111 are consistent with the arrangement direction X, while the thickness direction T2 of the bent section 112 forms an angle greater than 0 with the arrangement direction X. By way of example only, this angle can be 60° to 90°.

[0051] According to this structure, the heat exchanger 10 will have more than 3 straight parts, which can respectively face more than 3 air inlet surfaces of the heat exchange unit. This makes full use of the area of the multiple air inlet surfaces, reduces the wind resistance, and thus improves the heat exchange efficiency. In addition, since there is no need to rely on complex connecting pipelines, the cost of the heat exchanger 10 is relatively low and the space occupied is relatively small. In addition, since the bent section 112 is bent and twisted to an angle greater than 0 between its thickness direction and the arrangement direction, the requirements for the bending radius and the shortest length of the bent section 112 are both small, which makes the heat exchanger 10 have a small size, so that it can be applied to small-sized heat exchange units. Thus, it can be seen that the heat exchanger 10 can be applied to small-sized units and has high heat exchange efficiency and low cost.

[0052] Furthermore, referring to Figure 4 and Figure 5, each bent section 112 is bent and twisted such that its top is higher than the top surfaces of the two adjacent straight sections 11 along the arrangement direction X. This configuration of the bent section 112 is conducive to reducing the bending difficulty, decreasing the bending radius and the shortest length, and helping to avoid the flow path within the bent section 112 from being too narrow.

[0053] Reference Figure 1 and Figure 3 , the heat exchanger 10 may further include a plurality of fins 12. The plurality of fins 12 may be distributed among N + 1 plate-like portions 101, and no fins 12 are provided in the N turning portions 102. Since no fins 12 are provided in the turning portions 102, the requirements for the bending radius and the shortest length of the bent section 112 are both small, which enables the heat exchanger 10 to have a smaller size and thus be applicable to small-sized heat exchanger units.

[0054] As Figure 6 shown, as an implementation manner, a fin 12 may be provided between two adjacent straight sections 111 of each plate-like portion 101. The fin 12 may extend in a wavy shape along the length direction of the two straight sections 111, that is, the left-right direction in the figure. This configuration does not require the fin 12 to protrude beyond the straight section 11 in the width direction, which helps to reduce the size of the heat exchanger 10.

[0055] Continuing to refer to Figures 1 to 3 , in some examples, each flow path tube 11 may include 3 straight sections 111 and 2 bent sections 112, that is, N may be equal to 2. The 3 straight sections 111 include a first straight section 111a, a second straight section 111b, and a third straight section 111c, which are arranged in sequence along the direction from one end of the flow path tube 11 to the other end. The 2 bent sections 112 include a first bent section 112a and a second bent section 112b. The first bent section 112a connects the first straight section 111a and the second straight section 111b, and the second bent section 112b connects the second straight section 111b and the third straight section 111c. The first straight section 111a and the third straight section 111c are arranged oppositely. The plurality of first straight sections 111a of the plurality of flow path tubes 11 collectively form the plate-like portion 101a, the plurality of first straight sections 111b of the plurality of flow path tubes 11 collectively form the plate-like portion 101b, and the plurality of first straight sections 111c of the plurality of flow path tubes 11 collectively form the plate-like portion 101c. The plurality of bent portions 112a of the plurality of flow path tubes 11 collectively form the turning portion 102a, and the plurality of bent portions 112b of the plurality of flow path tubes 11 collectively form the turning portion 102b.

[0056] According to this configuration, from Figure 2When viewed from the top-down perspective, the heat exchanger 10 will generally be U-shaped, that is, it has three plate-like portions 101 and is open on one side. These three plate-like portions 101 can respectively face the three air inlet surfaces of the heat exchange unit group to ensure relatively high heat exchange efficiency. The open side of the heat exchanger 10 can be used to place the pipelines and related devices of the heat exchange unit group to ensure that the overall heat exchange unit group has a relatively compact structure.

[0057] Reference Figure 2 , two adjacent straight sections 111 of each flow path tube 11 have an included angle α, and two non-adjacent straight sections 111 separated by one straight section 111 have an included angle β. For example, the first straight section 111a and the second straight section 111b are two adjacent straight sections, and the included angle between them is α; the second straight section 111b and the third straight section 111c are two adjacent straight sections, and the included angle between them is α; the first straight section 111a and the third straight section 111c are separated by the second straight section 11b and are not adjacent, and the included angle between them is β. The included angle α can satisfy: 90° ≤ α ≤ 120°, and the included angle β can satisfy: 0° ≤ β ≤ 60°. Preferably, the included angle α can be approximately equal to 90°, and the included angle β can be approximately equal to 0°. In this way, each straight section of the heat exchanger 10 will be able to generally face the corresponding air inlet surface, thereby ensuring relatively high heat exchange efficiency.

[0058] Alternatively, the included angle α can also be any value among 95°, 100°, 105°, 110°, and 115°, and the included angle β can also be any value among 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, and 55°.

[0059] It can be understood that according to the different shapes of the heat dissipation unit group, the included angles α and β can be flexibly valued and are not necessarily limited to the above value ranges. By flexibly valuing the included angles α and β, the heat exchanger 10 can be enclosed to form different shapes to match heat exchange unit groups with different shapes and improve the heat exchange capacity.

[0060] Reference Figures 1 to 3 , one end of each flow path tube 111 is connected to the first manifold 13a, and the opposite end is connected to the second manifold 13b, so that the fluid medium flows from one end of each flow path tube 111 to the other end and exchanges heat with the corresponding fin 12. In some examples, the first manifold 13a can be provided with an inlet, and the second manifold 13b can be provided with an outlet. In other examples, both the inlet and the outlet can be provided on the first manifold 13a.

[0061] Above, an example of the heat exchanger 10 according to an embodiment of the present disclosure has been given. Next, in combination with Figures 1 to 6 the heat exchanger 10 according to an embodiment of the present disclosure has been illustrated by way of example. Next, in combination with Figures 7 to 11, an exemplary description is given of the heat exchangers 10a and 10b according to other embodiments of the present disclosure. The heat exchangers 10a and 10b hereinafter have many identical or similar elements to the heat exchanger 10 above. For the sake of brevity, in the context, the identical or similar elements will be denoted by the same reference numerals, and the repeated descriptions will be appropriately omitted.

[0062] Referring to Figures 7 to 9 , in the current embodiment, in addition to including the first straight section 111a, the second straight section 111b, and the third straight section 111c, the heat exchanger 10a further includes a fourth straight section 111d, and in addition to including the first bent section 112a and the second bent section 112b, the heat exchanger 10a further includes a third bent section 112c. That is to say, in the current embodiment, the heat exchanger 10a includes four straight sections 111 and three bent sections 112, and N = 3. The plurality of fourth straight sections 111d of the plurality of flow path tubes 11 together form a plate-like portion 101d, and the plurality of third bent sections 112c together form a turning portion 102c.

[0063] The fourth straight section 111d can be located between the third straight section 111c and the second end of the flow path tube 11 (i.e., the end connected to the second header 13b). The third bent section 112c connects the third straight section 111c and the fourth straight section 111d, and the fourth straight section 111d and the second straight section 111b are arranged opposite to each other. In this way, the heat exchanger 10b will have 4 plate-like portions, and the 4 plate-like portions respectively face the 4 air inlet surfaces of the heat exchange unit to obtain a higher heat exchange efficiency.

[0064] Furthermore, continuing to refer to Figures 7 to 9 , the length of the fourth straight section 111d can be shorter than the length of the second straight section 111b. According to this configuration, when observed from the top view perspective in Figure 8 , the heat exchanger 10a will generally be in a G shape. A space will be formed between the plate-like portion 101d and the plate-like portion 101a, and this space can be used to place the pipelines and related devices of the heat exchange unit to ensure that the overall heat exchange unit has a relatively compact structure.

[0065] The heat exchanger 10b according to another embodiment of the present disclosure is shown in Figure 10 . The heat exchanger 10b is generally the same as the heat exchanger 10 described above, and the main difference is that the heat exchanger 10b uses fins 12a different from the fins 12. Combining Figure 11 , in the current embodiment, each fin 12a extends along the arrangement direction X and is provided with a plurality of fin slots 121 arranged at intervals along the arrangement direction. The plurality of straight sections of each plate-like portion 101 respectively pass through the plurality of fin slots 121. Such fins 12 have the advantage of being relatively convenient to assemble.

[0066] The present disclosure also provides a heat exchange unit, which may include the heat exchangers 10, 10a, 10b described above.

[0067] Reference Figure 8 , as a preferred example, the heat exchange unit 100 may include two heat exchangers 10. The two second straight sections 111b of the two heat exchangers 10 are arranged opposite to each other, and the two first straight sections 111a and the two third straight sections 111c are located between the two second straight sections 111b. That is to say, the openings of the two heat exchangers 10 are arranged opposite to each other. In this way, the two heat exchangers 10 jointly enclose a rectangle, which is beneficial to heat exchange on the four sides of the unit at the same time, thereby further improving the heat exchange efficiency. As an alternative implementation, in the heat exchange unit 100, the heat exchanger 10 may be replaced by the heat exchanger 10b.

[0068] It can be understood that although in the above specific embodiments, the value of N is 2 or 3, in other embodiments of the present disclosure, N may also take other values. For example, the value of N may also be 4, 5, 6 or other integers greater than 6.

[0069] It can be understood that in the present disclosure, orientation descriptions such as "inner" and "outer" are relative rather than absolute. When the heat exchanger provided by the present disclosure is placed in the position shown in the drawings, these orientation words may be applicable.

[0070] It should be understood that although terms such as "first" or "second" may be used in the present disclosure to describe various elements (such as the first straight section and the second straight section), these elements are not defined by these terms, and these terms are only used to distinguish one element from another.

[0071] The basic principles of the present disclosure have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, advantages, effects, etc. mentioned in the present disclosure are only examples and not limitations, and it cannot be considered that these advantages, advantages, effects, etc. are essential for each embodiment of the present disclosure. In addition, the above-mentioned specific details are only for the purpose of illustration and easy understanding, rather than limitations. The above details do not limit the present disclosure to necessarily adopt the above specific details to implement.

[0072] The above description has been given for purposes of illustration and description. In addition, this description is not intended to limit the embodiments of the present disclosure to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub-combinations thereof.

[0073] The components and devices involved in this disclosure are only illustrative examples and do not intend to require or imply that they must be connected, arranged, and configured in the manner shown in the drawings. As those skilled in the art will recognize, these components and devices can be connected, arranged, and configured in any way.

[0074] The above are only specific embodiments of this disclosure, but the protection scope of this disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by this disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of this disclosure. Therefore, the protection scope of this disclosure should be subject to the protection scope of the claims.

Claims

1. A heat exchanger, characterized in that: The invention comprises a plurality of flow tubes, wherein the plurality of flow tubes are arranged at intervals from each other along an arrangement direction, each flow tube comprises N curved sections and N+1 straight sections, where N≥2; each curved section connects two adjacent straight sections so that the two adjacent straight sections form an angle greater than 0; the cross section of each flow tube is flat, the thickness direction of each straight section is consistent with the arrangement direction, and each curved section is bent and twisted so that the thickness direction of the curved section forms an angle greater than 0 with the arrangement direction.

2. The heat exchanger according to claim 1, characterized in that Each flow tube has a first end and a second end opposite to each other. The flow tube includes a first straight section, a second straight section and a third straight section in sequence from the first end to the second end. The first straight section and the third straight section are arranged opposite to each other.

3. The heat exchanger according to claim 2, characterized in that Each flow tube further includes a fourth straight section between the third straight section and the second end, and the second straight section and the fourth straight section are arranged opposite to each other.

4. The heat exchanger according to claim 3, characterized in that The length of the fourth straight section is shorter than the length of the second straight section.

5. The heat exchanger according to any one of claims 1 to 4, characterized in that The two adjacent straight sections of each flow tube form an angle α, and the two non-adjacent straight sections of each flow tube separated by a straight section form an angle β, wherein 90°≤α≤120°, and 0°≤β≤60°.

6. The heat exchanger according to any one of claims 1 to 4, characterized in that: Each curved segment is bent and twisted so that its top portion is higher than top surfaces of the two adjacent straight segments along the arrangement direction.

7. The heat exchanger according to any one of claims 1 to 4, characterized in that The N+1 straight sections of the multiple flow tubes together form N+1 plate-like parts, and the N curved sections of the multiple flow tubes together form N turning parts, each plate-like part is rectangular, and each turning part is vertically arranged along the arrangement direction.

8. The heat exchanger according to claim 7, characterized in that It also includes a plurality of fins, which are distributed on the N+1 plate-shaped parts, and the N turning parts are not provided with fins.

9. The heat exchanger according to claim 8, characterized in that A fin is provided between two adjacent straight sections of each plate-shaped portion, and the fin extends in a wave shape along the length direction of the two straight sections.

10. The heat exchanger according to claim 8, characterized in that Each fin extends along the arrangement direction and is provided with a plurality of fin slots arranged at intervals along the arrangement direction, and a plurality of straight sections of each plate-shaped portion respectively pass through the plurality of fin slots.

11. The heat exchanger according to any one of claims 1 to 4, characterized in that The invention also comprises two collecting pipes, and two ends of each flow path pipe are respectively connected to the two collecting pipes.

12. A heat exchange unit, characterized in that: Comprising a heat exchanger according to any one of claims 1 to 8.

13. A heat exchange unit, characterized in that: It comprises two heat exchangers, each heat exchanger is the heat exchanger according to claim 2, the two second straight sections of the two heat exchangers are arranged opposite to each other, and the two first straight sections and the two third straight sections of the two heat exchangers are located between the two second straight sections.

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