HEAT EXCHANGER AND AIR CONDITIONING SYSTEM HAVING SAME

Abstract

A heat exchanger and an air conditioning system are provided. The heat exchanger includes a first fin and a plurality of flat pipes parallel to each other and arranged at interval, wherein each of the plurality of flat pipes includes a reserved pipe section, each of the plurality of flat pipes is bent at the reserved pipe section, the first fin is connected to the reserved pipe section and is capable of covering gaps between a plurality of reserved pipe sections; and wherein along an extending direction of the reserved pipe section, a width of the first fin is defined as W1, the number of the first fin is n, a length of the reserved pipe section is defined as L, and the width W1 of the first fin, the number n of the first fin, the length L of the reserved pipe section satisfy following relationship:

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of international patent application No. PCT/CN2023/080688, filed on Mar. 10, 2023, which itself claims priority to Chinese patent application No. 202220579388.5, filed on Mar. 16, 2022, and titled “HEAT EXCHANGER”. The contents of the above identified application are hereby incorporated herein in their entireties by reference.

TECHNICAL FIELD

The present disclosure relates to the field of heat exchanger technology, and in particular, to a heat exchanger and an air conditioning system having the same.

BACKGROUND

In the related technology of heat exchanger, since a reserved pipe section of a flat pipe is bent and twisted and no fin is provided at a reserved pipe section, a relatively large gap is formed between two adjacent reserved pipe sections after being bent, which may cause air leakage and affect a heat exchange performance. In addition, without a protection of the fin, the reserved pipe section of the flat pipe is directly exposed to outside, which is prone to corrosion and an external damage.

SUMMARY

According to various embodiments of the present disclosure, a heat exchanger and an air conditioning system having the same are provided.

The present disclosure provides a heat exchanger. The heat exchanger includes a first fin and a plurality of flat pipes parallel to each other and arranged at intervals. Each of the plurality of flat pipes includes a reserved pipe section, and each of the plurality of flat pipes is bent at the reserved pipe section. The first fin is connected to the reserved pipe section and capable of covering gaps between a plurality of reserved pipe sections. Along an extending direction of the reserved pipe section, a width of the first fin is defined as W₁, the number of the first fin is n, a length of the reserved pipe section is defined as L, and the width W₁ of the first fin, the number n of the first fin, the length L of the reserved pipe section satisfy following relationship: W₁≤L/n.

In one embodiment, a width of the reserved pipe section is defined as W₂, the width W₁ of the first fin and the width W₂ of the reserved pipe section satisfy following relationship: W₁≤W₂.

In one embodiment, a width of the reserved pipe section is defined as W₂, the width W₂ of the reserved pipe section and the length L of the reserved pipe section satisfy following relationship: L≥2W₂.

In one embodiment, the plurality of flat pipes further includes a first pipe section and a second pipe section. Two ends of the reserved pipe section are connected to the first pipe section and the second pipe section, respectively. The reserved pipe section includes a straight pipe section and a bent pipe section connected to each other. An end of the straight pipe section is connected to the first pipe section and/or the second pipe section. Two ends of the bent pipe section are connected to the straight pipe section, respectively.

In one embodiment, a width of a part of the first fin connected to the straight pipe section is greater than or equal to a width of a part of the first fin connected to the bent pipe section.

In one embodiment, along a direction perpendicular to the extending direction of the reserved pipe section, a height of the first fin is defined as h′, and the height h′ of the first fin decreases from the straight pipe section to the bent pipe section.

In one embodiment, a width of each of the plurality of flat pipes is defined as W₃, and a maximum of the height h′ of the first fin is smaller than or equal to the width W₃ of each of the plurality of flat pipes.

In one embodiment, the first fin is distributed on two sides of each of the plurality of reserved pipe sections.

In one embodiment, the first fin is provided with a plurality of grooves. The plurality of grooves are arranged at intervals along a length direction of the first fin. At least part of each of the plurality of reserved pipe sections is located in one of the plurality of grooves.

In one embodiment, the plurality of the reserved pipe sections are corresponding to the plurality of grooves one by one. Alternatively, at least one of the plurality of grooves between adjacent two of the plurality of reserved pipe sections does not fit with the plurality of the reserved pipe sections.

In one embodiment, the first fin includes a plurality of the fin segments sequentially connected, each of the plurality of fin segments is located between adjacent two of the plurality of reserved pipe sections, and a cross section of each of the plurality of fin segments are in an arc shape, a straight line shape, an oblique line shape, a V shape or a wave shape.

In one embodiment, a width of each of the plurality of flat pipes is defined as W₃, and a height of each of the plurality of fin segments along a width direction of each of the plurality of flat pipes is defined as h, the width W₃ of each of the plurality of flat pipes and the height h of each of the plurality of fin segments satisfy a relationship: h>W₃/2.

In one embodiment, the first fin is made of composite aluminum foil.

The present disclosure further provides an air conditioning system including the above heat exchanger.

Details of one or more embodiments of the present disclosure are presented in the attached drawings and descriptions below. And other features, purposes and advantages of the present disclosure will become apparent from the description, drawings and claims.

BRIEF DESCRIPTION OF THE DRAWINGS

For a better description and illustration of embodiments and/or examples of those disclosures disclosed herein, reference may be made to one or more attached drawings. Additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed disclosures, currently described embodiments and/or examples, and currently understood best modes of these disclosures.

FIG. 1 is a schematic diagram of a heat exchanger before being bent in a front view of one or more embodiments.

FIG. 2 is a schematic diagram of a heat exchanger after being bent in a top view of one or more embodiments.

FIG. 3 is a partial enlarged view of portion A in FIG. 2.

FIG. 4 is a schematic diagram of an installation cross section of a first fin and a reserved pipe section in a heat exchanger of one or more embodiments.

FIG. 5 is a schematic diagram of an installation cross section of a first fin and a reserved pipe section in a heat exchanger of one or more embodiments.

FIG. 6 is a schematic diagram of an installation cross section of a first fin and a reserved pipe section in a heat exchanger of one or more embodiments.

FIG. 7 is a schematic diagram of an installation cross section of a first fin and a reserved pipe section in a heat exchanger of one or more embodiments.

FIG. 8 is a schematic diagram of an installation cross section of a first fin and a reserved pipe section in a heat exchanger of one or more embodiments.

FIG. 9 is a schematic diagram of an installation cross section of a first fin and a reserved pipe section in a heat exchanger of one or more embodiments.

FIG. 10 is a schematic diagram of an installation cross section of a first fin and a reserved pipe section in a heat exchanger of one or more embodiments.

FIG. 11 is a schematic diagram of an installation cross section of a first fin and a reserved pipe section in a heat exchanger of one or more embodiments.

FIG. 12 is a schematic diagram of an air conditioning system of one or more embodiments.

FIG. 13 is a partial enlarged view of portion A in FIG. 2 of another embodiment.

Reference signs are as follows: 100 represents a heat exchanger; 10 represents a first fin; 11 represents a groove; 12 represents a fin segment; 20 represents a flat pipe; 21 represents a reserved pipe section; 211 represents a straight pipe section; 212 represents a bent pipe section; 22 represents a first pipe section; 23 represents a second pipe section; 30 represents a second fin; and 200 represents an air conditioning system.

DETAILED DESCRIPTION

In order to make above objectives, features, and advantages of the present disclosure more obvious and understandable, a detailed explanation of the specific implementation of the present disclosure will be provided below in combination with drawings. Many specific details are elaborated in following description to facilitate a thorough understanding of the present disclosure. However, the present disclosure can be implemented in many other ways different from described ways herein, and the skilled in the art can make similar improvements without departing from a substantial spirit of the present disclosure. Therefore, the present disclosure is not limited by the specific embodiments disclosed hereafter.

It should be noted that, when a component is considered “fixed on” or “disposed on” another component, it can be directly disposed on another component or there may be a centered component present simultaneously. When a component is considered “connected to” another component, it can be directly connected to another component or there may be a centered component present simultaneously. The terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in the specification of the present disclosure are for illustrative purposes only and do not represent the only implementation method.

In addition, the terms “first” and “second” are only used to describe the purpose and can not be understood as indicating or implying relative importance or implying the quantity of indicated technical features. Therefore, the features limited to “first” and “second” can explicitly or implicitly include at least one of these features. In the description of the present disclosure, “multiple” means at least two, such as two, three, etc., unless there is an otherwise specific limitation.

In the present disclosure, unless there is the otherwise specifications and limitations, the first feature is “above” or “below” the second feature which may be a direct contact between the first and second features, or the first features and the second features may be in indirect contact through an intermediate medium. Moreover, the first feature is “on”, “above”, and “over” the second feature can be that the first feature is directly or diagonally above the second feature, or only indicates that the first feature is horizontally higher than the second feature. The first feature is “beneath”, “below”, and “under” the second feature can be that the first feature is directly or diagonally below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

Unless otherwise defined, all technical and scientific terms used in this article have the same meanings as those commonly understood by those skilled in the art of the present disclosure. The terms used in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term “and/or” used in this article includes any and all combinations of one or more related listed items.

Referring to FIGS. 1 to 13, a heat exchanger 100 is usually applied to an air conditioning system 200 and is the most widely used heat-exchanging apparatus in a gas and liquid heat exchanger. The heat exchanger 100 is configured to enhance heat exchange by adding fins to an ordinary heat exchange pipe.

In the related technology of heat exchanger, since a reserved pipe section of a flat pipe is bent and twisted and no fin is provided on a reserved pipe section, a relatively large gap is formed between two adjacent reserved pipe sections after being bent, which may cause air leakage and affect heat-exchanging performance. In addition, without a protection of the fin, the reserved pipe section of the flat pipe is directly exposed to outside, which is prone to corrosion and an external damage.

In the present disclosure, the heat exchanger 100 is provided. The heat exchanger 100 includes a first fin 10 and a plurality of flat pipes 20 parallel to each other and arranged at intervals.

Each of the plurality of flat pipes 20 includes a reserved pipe section 21, and each of the plurality of flat pipes 20 is bent at the reserved pipe section 21. The first fin 10 is connected to the reserved pipe section 21 and can cover gaps between the plurality of the reserved pipe sections 21. Along an extending direction of the reserved pipe sections 21, a width of the first fin 10 is defined as W₁, the number of the first fin 10 is n, a length of the reserved pipe section 21 is defined as L, the width W₁ of the first fin 10, the number n of the first fin 10 and the length L of the first fin 10 satisfy following relationship: W₁≤L/n.

Since the width W₁ of the first fin 10, the number n of the first fin 10, and the length L of the reserved pipe section 21 satisfy the relationship: W₁≤L/n, the phenomenon that a plurality of first fins 10 overlaps to each other, which affects bending of the heat exchanger 100, and even the first fin 10 cannot be welded to the reserved pipe section 21 when the heat exchanger 100 is bent, can be avoided. In particular, the length L of the reserved pipe section 21 is a total length of a part of the flat pipe 20 corresponding to the reserved pipe section 21 before the flat pipe 20 being bent.

In addition, the first fin 10 can play a role of shielding/covering gaps between the multiple reserved pipe sections 21, so that air leakage is avoided and heat exchange efficiency of the heat exchanger 100 is improved. Moreover, the first fin 10 can protect the multiple reserved pipe sections 21, so that corrosion ans damage of the reserved pipe sections 21 are avoided and a service life of the heat exchanger 100 is prolonged.

The heat exchanger 100 bent at the reserved pipe section can be in a V shape, a straight line shape, an L shape and so on. When the reserved pipe section 21 is in the straight line shape, the plurality of reserved pipe sections 21 are twisted 180° to form multiple rows in FIG. 3. When the reserved pipe section is bent and in the straight line shape, the reserved pipe section 21 is bent multiple times and arranged in multiple rows.

Referring to FIG. 1, the heat exchanger 100 further includes a plurality of second fins 30. Each of the plurality of the flat pipes 20 further includes a first pipe section 22 and a second pipe section 23. Two ends of the reserved pipe section 21 are connected to the first pipe section 22 and the second pipe section 23, respectively. A plurality of first pipe sections 22 are parallel to each other and arranged at intervals. The plurality of second fins 30 are distributed between the plurality of the first pipe sections 22 parallel to each other and arranged at intervals. A plurality of second pipe sections 23 are parallel to each other and arranged at intervals, and the plurality of second fins 30 are distributed between the plurality of second pipe sections 23 parallel to each other and arranged at intervals.

The reserved pipe section 21 is located between the first pipe section 22 and the second pipe section 23. In the related technology of a heat exchanger, a reserved pipe section is usually used for bending of the heat exchanger, therefore, no second fin is arranged on the reserved pipe section, and the reserved pipe section is directly exposed to outside without a protection, which is prone to the corrosion and the external damage. If the second fin is disposed on the reserved pipe section, the reserved pipe section does not suffer from damage, but the second fin is prone to tearing during a process of the reserved pipe section being bent. Therefore, it is required to ensure that the second fin 30 does not tear during the process of the reserved pipe section being bent on basis of protecting the reversed pipe section to not suffer from damage. Based on this, in the present disclosure, a special fin is disposed on the reserved pipe section 21, i.e., the first fin 10.

Referring to FIGS. 2 and 3, the reserved pipe section 21 includes a straight pipe section 211 and a bent pipe section 212 connected to each other. An end of the straight pipe section 211 is connected to the first pipe section 22 and/or the second pipe section 23. Two ends of the bent pipe section 212 are connected to the straight pipe section 211, respectively.

After the reserved pipe section 21 being bent, at least part of the reserved pipe section 21 needs to be defined as the straight pipe section 211. Because if the whole reserved pipe section 21 is defined as the bent pipe section 212, strength of the reserved pipe section 21 is significantly reduced after the heat exchanger 100 being bent. In order to enhance the strength of the reserved pipe section 21 being bent, at least part of the reserved pipe section 21 being bent is required to be provided as the straight pipe section 211.

Furthermore, a width of a part of the first fin 10 connected to the straight pipe section 211 is greater than a width of a part of the first fin 10 connected to the bent pipe section 212.

The first fin 10 is required to be connected to the straight pipe section 211 as much as possible and not the bent pipe section 212. Since the bent pipe section 212 bears relatively large torque and a risk of tearing is relatively large during a bending process of a part of the first fin 10 connected to the bent pipe section 212, and strength of the bent pipe section 212 is less than that of the straight pipe section 211, therefore, the first fin 10 is required to be connected to the straight pipe section 211 as much as possible but not the bent pipe section 212, such that twisting degree of the first fin 10 is relatively low, which is not prone to tearing.

Furthermore, a width of the reserved pipe section 21 is defined as W₂, and the width W₂ of the reserved pipe section 21 and the width W₁ of the first fin 10 satisfy a relationship: W₁≤W₂. In other words, the width W₁ of the first fin 10 is required to be small as much as possible. In the present disclosure, the width W₁ of the first fin 10 is defined to be less than or equal to the width W₂ of the reserved pipe section 21, only when the width W₁ of the first fin 10 is small as much as possible, it can better ensure that the first fin 10 is more connected to the straight pipe section 211, such that the first fin 10 is not prone to tearing when the heat exchanger 100 is bent.

In particular, the width W₂ of the reserved pipe section 21 and the length L of the reserved pipe section 21 satisfy a relationship: L≥2W₂.

The length L of the reserved pipe section 21 is required to be great enough. In the present disclosure, the length L of the reserved pipe section 21 is defined to be greater than or equal to twice the width W₂ of the reserved pipe section 21. Only when the length L of the reserved pipe section 21 is great enough, it can ensure that at least part of the reserved pipe section 21 is defined as the straight pipe section 211, thereby enhancing the structure strength of the reserved pipe section 21. Since the W₂ of the reserved pipe section 21 and the L of the reserved pipe section 21 satisfy the relationship: L≥2W₂, such that the first fin 10 is not prone to tearing when the heat exchanger 100 is bent.

Referring to FIG. 13, along a direction perpendicular to the extending direction of the reserved pipe section 21, a height of the first fin 10 is defined as h′, and the height h′of the first fin 10 decreases from the straight pipe section 211 to the bent pipe section 212. Therefore, a deformation ability of the first fin 10 at the bent pipe section 212 is increased, which is conducive to adapting to a bending deformation of the reserved pipe section 21.

Furthermore, a width of each of the plurality of flat pipes 20 is defined as W₃, and a maximum of the height h′of the first fin 10 is smaller than or equal to the width W₃ of each of the plurality of flat pipes 20, resulting in saving material in a preparing process and reducing cost. The width W₃ of each of the plurality of flat pipes 20 is equal to a width W₂ of the reserved pipe section 21.

Referring to FIGS. 4 to 11, the first fin 10 is provided with a plurality of grooves 11, the plurality of grooves 11 are arranged at interval along a length direction of the first fin 10, and at least part of each of the plurality of the reserved pipe sections 21 is located in one of the plurality of grooves 11. Therefore, connection strength between the first fin 10 and the plurality of the reserved pipe sections 21 is stronger, the first fin 10 is prone to deforming during a process of the plurality of reserved pipe sections 21 being bent, and the first fin 10 can cover the gaps between the plurality of the reserved pipe sections 21 after deforming.

In particular, the number of the plurality of grooves 11 can be provided as same as that of the plurality of reserved pipe sections 21, the plurality of reserved pipe sections 21 is corresponding to the plurality of grooves 11 one by one, which is shown in embodiments of FIGS. 4, 7, 8, 9, 10 and 11.

Alternatively, the number of the plurality of grooves 11 can be provided to be grater than that of the reserved pipe section 21. Between adjacent two of the plurality of reserved pipe sections 21, at least one of the plurality of grooves 11 does not fit with the plurality of reserved pipe sections 21. The first fin 10 is prone to deforming during a process of the reserved pipe section 21 being bent, thereby blocking the gaps between the plurality of reserved pipe sections 21 and improving an air anti-leakage effect, which is shown in FIGS. 6 to 7.

In the above embodiment, the first fin 10 includes a plurality of fin segments 12 sequentially connected to each other, each of the plurality of fin segments 12 is located between two adjacent reserved pipe sections 21, a cross section of each of the plurality of fin segments 12 can be in an arc shape (embodiment in FIG. 10), a straight line shape (embodiments in FIGS. 4, 7 and 8), an oblique line shape (embodiment in FIG. 9), a V shape (embodiment 11) or a wave shape (embodiments in FIGS. 5 and 6).

Referring to FIG. 9, in some embodiments, the first fin 10 can cover the gaps between the plurality of reserved pipe sections 21. The first fin 10 is bent after the reserved pipe section 21 being bent and not detached from the plurality of reserved pipe sections 21, and a connection effect between the first fin 10 and the plurality of reserved pipe sections 21 is great.

Referring to FIG. 8, in some embodiments, the first fin 10 is distributed on two sides of each of the plurality of reserved pipe sections 21. Alternatively, in other embodiments, the first fin 10 can be distributed on one side or both two sides of each of the plurality of reserved pipe sections 21, which is not limited herein. In one embodiment, the heat exchanger 100 is provided with a windward side and a leeward side (that is, both sides of the reserved pipe segment 21) on the width direction of the flat pipes 20, and the first fins 10 are disposed on the windward side and the leeward side to further prevent air leakage and improve the heat exchange efficiency.

Referring to FIG. 6, in some embodiments, a width of each of the plurality of flat pipes 20 is defined as W₃, a height of each of plurality of fin segments 12 is defined as h along a width direction of each of the plurality of flat pipes 20. The height h of each of the plurality of fin segments 12 is greater than a half of the width W₃ of each of the plurality of flat pipes 20. A size of a contact part between each of the plurality of fin segments 12 and each of the plurality of flat pipes 20 is greater than a half of the width W₃ of each of the plurality of flat pipes 20, thereby improving the size of the contact part between each of the plurality of fin segments 12 and each of the plurality of flat pipe 20, further improving connection strength between the first fin 10 and each of the plurality of flat pipes 20, and improving heat exchange area of the first fin 10. Alternatively, in other embodiments, the size of the contact part between each of the plurality of fin segments 12 and each of the plurality of flat pipes 20 can be less than a half of the width W₃ of each of the plurality of flat pipes 20, which is not limited herein.

The above embodiments can be combined with each other to form new embodiments, a cross section of each of the plurality of fin segment 12 is not limited by above shape and can be other shapes. A connection way between the first fin 10 and the reserved pipe section 21 is not limited by above way and can be other way, which is not limited herein.

In above embodiment, the first fin 10 is made of composite aluminum foil. Since the composite aluminum foil has a great thermal conductivity and is prone to deforming, during the bending process of the reserved pipe section 21, the composite aluminum foil is prone to deforming when the reserved pipe section 21 deforms, thereby remaining a covering of the gaps between the plurality of reserved pipe sections 21 and improving effects of heat exchange and a protection.

Alternatively, the first fin 10 is welded to the reserved pipe section 21, such that connection strength between the first fin 10 and the reserved pipe section 21 is higher. The composite aluminum foil can include two or more layers. In particular, one of the two layers of the composite aluminum foil has a higher melting point, and the other one of the two layers of the composite aluminum foil has a lower melting point. Alternatively, a surface layer of the composite aluminum foil has a lower melting point, and a middle layer of the composite aluminum foil has a higher melting point. During a process of welding, a layer of the composite aluminum foil with a lower melting point is connected with the reserved pipe section 21.

In the above embodiments, electric potential of the first fin 10 is lower than that of the reserved pipe section 21. During a process of using the heat exchanger 100, if the corrosion occurs, the first fin 10 with lower electric potential is first corroded and then the reserved pipe section 21 is corroded, such that the reserved pipe section 21 can be protected by the first fin 10, thereby improving durability of the heat exchanger 100.

In the heat exchanger 100 of the present disclosure, since the W₁ of the first fin, the n of the first fin and the L of the reserved pipe section 21 satisfy the relationship W₁≤L/n, the phenomenon that a plurality of first fins 10 overlaps to each other, which affect bending of the heat exchanger 100, and even the first fin 10 can not be welded to the reserved pipe section 21 when the heat exchanger 100 is bent can be avoided.

The various technical features of the above embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, they should be considered within the scope of the specification.

One of ordinary skill in the art should recognize that the above embodiments are used only to illustrate the present disclosure and are not used to limit the present disclosure, and that appropriate variations and improvements to the above embodiments fall within the protection scope of the present disclosure so long as they are made without departing from the substantial spirit of 5 the present disclosure.

Claims

1. A heat exchanger comprising a first fin and a plurality of flat pipes parallel to each other and arranged at interval, wherein each of the plurality of flat pipes comprises a reserved pipe section, each of the plurality of flat pipes is bent at the reserved pipe section, the first fin is connected to the reserved pipe section and is capable of covering gaps between a plurality of reserved pipe sections; wherein along an extending direction of the reserved pipe section, a width of the first fin is defined as W1, the number of the first fin is n, a length of the reserved pipe section is defined as L, and the width W1 of the first fin, the number n of the first fin, the length L of the reserved pipe section satisfy following relationship:

2. The heat exchanger of claim 1, wherein a width of the reserved pipe section is defined as W2, and the width W2 of the reserved pipe section and the width W1 of the first fin satisfy following relationship: W1≥L/2.

3. The heat exchanger of claim 1, wherein a width of the reserved pipe section is defined as W2, the width W2 of the reserved pipe section and the length L of the reserved pipe section satisfy following relationship: L≥2W2.

4. The heat exchanger of claim 1, wherein the plurality of flat pipes further comprises a first pipe section and a second pipe section, two ends of the reserved pipe section are connected to the first pipe section and the second pipe section, respectively, the reserved pipe section comprises a straight pipe section and a bent pipe section connected to each other, an end of straight pipe section is connected to the first pipe section and/or the second pipe section, and two ends of the bent pipe section are connected to the straight pipe section, respectively.

5. The heat exchanger of claim 4, wherein a width of a part of the first fin connected to the straight pipe section is greater than or equal to a width of a part of the first fin connected to the bent pipe section.

6. The heat exchanger of claim 1, wherein along a direction perpendicular to the extending direction of the reserved pipe section, a height of the first fin is defined as h′, and the height h′of the first fin decreases from the straight pipe section to the bent pipe section.

7. The heat exchanger of claim 6, wherein a width of each of the plurality of flat pipes is defined as W3, and a maximum of the height h′of the first fin is smaller than or equal to the width W3 of each of the plurality of flat pipes.

8. The heat exchanger of claim 1, wherein the first fin is distributed on two sides of each of the plurality of reserved pipe sections.

9. The heat exchanger of claim 1, wherein the first fin is provided with a plurality of grooves, the plurality of grooves are arranged at interval along a length direction of the first fin, and at least part of each of the plurality of reserved pipe sections is located in one of the plurality of grooves.

10. The heat exchanger of claim 9, wherein the plurality of the reserved pipe sections are corresponding to the plurality of grooves one by one, or at least one of the plurality of grooves between adjacent two of the plurality of reserved pipe sections does not fit with the plurality of reserved pipe sections.

11. The heat exchanger of claim 9, wherein the first fin comprises a plurality of fin segments sequentially connected, each of the plurality of fin segments is located between adjacent two of the plurality of reserved pipe sections, and a cross section of each of the plurality of fin segments is in an arc shape, a straight line shape, an oblique line shape, V shape or wave shape.

12. The heat exchanger of claim 11, wherein a width of each of the plurality of flat pipes is defined as W3, a height of each of the plurality of fin segments along a width direction of each of the plurality of flat pipes is defined as h, the width W3 of each of the plurality of flat pipes and the height h of each of the plurality of fin segments satisfy the relationship: h>W3/2.

13. The heat exchanger of claim 1, wherein the first fin is made of composite aluminum foil.

14. An air conditioning system comprising the heat exchanger of claim 1.