Fresh air pipe, fresh air assembly and air conditioner

Abstract

The utility model discloses a fresh air pipe, a fresh air assembly and an air conditioner, and the fresh air pipe comprises a first pipe section, a second pipe section and a third pipe section, one end of the second pipe section is connected with the first pipe section, and the second pipe section is constructed into a bendable corrugated pipe; and the third pipe section is connected with the other end of the second pipe section. The whole fresh air pipe is of a three-section structure, due to the fact that the second pipe section located in the middle is the corrugated pipe with the bendable characteristic, the fresh air pipe can be stored in a bent mode, the packaging length size of the fresh air pipe can be reduced, space is saved, packaging and transportation of the fresh air pipe are facilitated, and cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to a fresh air duct, a fresh air assembly, and an air conditioner. Background Technology

[0002] In related technologies, the fresh air structure of air conditioners requires the fresh air component to be connected to the outside via a fresh air duct, allowing outdoor air to enter the fresh air component. Currently, common fresh air ducts are quite long, requiring longer outer packaging during packaging and transportation, which is inconvenient for product transport. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a novel air duct that reduces packaging length, thus facilitating product transportation.

[0004] This invention also aims to provide a fresh air assembly for using the aforementioned fresh air duct.

[0005] This invention also aims to provide an air conditioner that utilizes the aforementioned fresh air assembly.

[0006] A fresh air duct according to an embodiment of the present invention includes: a first pipe section having a threaded connection portion; a second pipe section having one end connected to the first pipe section and configured as a flexible corrugated pipe; and a third pipe section having the third pipe section connected to the other end of the second pipe section.

[0007] According to the embodiment of this utility model, the fresh air duct is composed of a three-section structure. Since the second section in the middle is a corrugated pipe with bendable characteristics, the fresh air duct can be bent and stored, which can reduce the packaging length of the fresh air duct, save space, facilitate the packaging and transportation of the fresh air duct, and reduce costs.

[0008] In some embodiments of this utility model, the center position of the second pipe segment coincides with or is adjacent to the center position of the fresh air duct along the length direction of the fresh air duct.

[0009] In some embodiments of this utility model, the first pipe segment includes: a first part, which is a circular pipe and is provided with the threaded connection portion; a second part, which is connected to the second pipe segment and is provided with a clearance space recessed toward the central axis of the first part; and a third part, which is an arc-shaped transition connecting the first part and the second part.

[0010] In some embodiments of this utility model, the second part includes: a first semicircular wall; a second semicircular wall, the radius of which is smaller than that of the first semicircular wall, and which protrudes outward relative to the first semicircular wall; and a transition wall, which is disposed at opposite ends of the second semicircular wall and connects to the first semicircular wall.

[0011] In some embodiments of this utility model, the centers of the first semicircular wall and the second semicircular wall coincide.

[0012] In some embodiments of this utility model, the cross-section of the second pipe segment perpendicular to the central axis and the cross-section of the second part perpendicular to the central axis have the same shape and coincide; or, the cross-section of the second pipe segment perpendicular to the central axis and the cross-section of the third pipe segment perpendicular to the central axis both have the same shape and coincide with the cross-section of the second part perpendicular to the central axis.

[0013] In some embodiments of this utility model, the wall thickness of the second pipe segment is less than the wall thickness of the first pipe segment and the third pipe segment.

[0014] In some embodiments of this utility model, the wall thickness of the first pipe segment is T1, the wall thickness of the second pipe segment is T2, and the wall thickness of the third pipe segment is T3, wherein 0.7mm≤T1≤1.2mm, 0.4mm≤T2≤0.8mm, and 0.7mm≤T3≤1.2mm.

[0015] In some embodiments of this utility model, the threaded connection portion is an external thread structure located on the outside of the first pipe section.

[0016] In some embodiments of this invention, the second pipe segment is configured to be flexible and U-shaped.

[0017] A fresh air assembly according to an embodiment of the present utility model includes: a fresh air component, the fresh air component being provided with an air inlet connector; an adapter, the adapter and the air inlet connector being detachably connected; and a fresh air duct as described in any of the preceding descriptions, wherein the first duct segment is threadedly connected to the adapter via the threaded connection portion.

[0018] According to the embodiments of the present invention, since the fresh air duct is the longest component in the fresh air assembly, after the fresh air duct and adapter are disassembled, the fresh air duct can be bent and stored in the packaging, resulting in a smaller packaging size and length. Therefore, the fresh air assembly can be packaged more compactly, saving space and facilitating the packaging and transportation of the fresh air assembly.

[0019] In some embodiments of this utility model, the threaded connection part is an external thread structure provided on the outside of the first pipe section, and the adapter is provided with an internal thread structure on the inside. The internal thread structure and the external thread structure are threadedly connected and engaged.

[0020] An air conditioner according to an embodiment of the present invention includes a fresh air assembly as described above.

[0021] According to the embodiments of the present invention, the air conditioner can reduce the transportation cost of the air conditioner because the fresh air component can be packaged more compactly, saving space and making packaging and transportation more convenient.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 A three-dimensional structural schematic diagram of a fresh air duct provided for some embodiments of this utility model;

[0025] Figure 2 Schematic diagram of fresh air duct provided for some embodiments of this utility model Figure 1 ;

[0026] Figure 3 Schematic diagram of fresh air duct provided for some embodiments of this utility model Figure 2 ;

[0027] Figure 4 for Figure 3 A sectional view taken along line AA;

[0028] Figure 5 for Figure 3 A sectional view taken along line BB;

[0029] Figure 6 for Figure 3 A sectional view taken along line CC;

[0030] Figure 7 for Figure 6 A magnified view of part I;

[0031] Figure 8 This is a schematic diagram of the U-shaped bend in the fresh air duct provided in some embodiments of the present invention;

[0032] Figure 9 A three-dimensional structural schematic diagram of a fresh air assembly provided in some embodiments of this utility model;

[0033] Figure 10 Exploded view of a fresh air assembly provided in some embodiments of this utility model;

[0034] Figure 11 A three-dimensional structural schematic diagram of the adapter provided in some embodiments of this utility model;

[0035] Figure 12 This is a schematic diagram of a fresh air assembly installed on a wall according to some embodiments of the present invention.

[0036] Reference numerals:

[0037] 100. Fresh air system components;

[0038] 10. Fresh air duct;

[0039] 11. First pipe section;

[0040] 101. Threaded connection; 111. First part; 112. Second part; 112a. Clearance space; 1121. First semicircular wall; 1122. Second semicircular wall; 1123. Transition wall; 113. Third part;

[0041] 12. Second pipe section;

[0042] 13. Third pipe section;

[0043] 20. Fresh air components;

[0044] 21. Air inlet connector;

[0045] 30. Adapter;

[0046] 31. Internal thread structure; 32. Elastic snap fastener.

[0047] 200. Wall; 201. Through hole. Detailed Implementation

[0048] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0049] In the description of this utility model, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0050] Furthermore, features specified as "first" or "second" may explicitly or implicitly include one or more of the same feature, used to distinguish and describe features, without any order or distinction of importance.

[0051] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0052] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0053] The fresh air duct 10 of this embodiment can be applied to the fresh air assembly 100, and the fresh air assembly 100 can be applied to an air conditioner. The fresh air assembly 100 may include a fresh air component 20, an adapter 30 and a fresh air duct 10. The fresh air duct 10 can be connected to the fresh air component 20 through the adapter 30.

[0054] The fresh air duct 10 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0055] like Figures 1 to 3 As shown, a fresh air duct 10 according to an embodiment of the present utility model includes: a first pipe section 11, a second pipe section 12 and a third pipe section 13. The first pipe section 11 is provided with a threaded connection part 101; one end of the second pipe section 12 is connected to the first pipe section 11 and is constructed as a flexible corrugated pipe; the third pipe section 13 is connected to the other end of the second pipe section 12.

[0056] The threaded connection 101 can refer to the threaded structure provided on the first pipe section 11, and the threaded structure can be located on the inner or outer side of the first pipe section 11, without specific limitations. The first pipe section 11 can be connected to the adapter 30 through the threaded connection 101.

[0057] In the above technical solution, the first pipe segment 11, the second pipe segment 12, and the third pipe segment 13 can be, but are not limited to, round pipes, square pipes, elliptical pipes, etc., and the shapes of the first pipe segment 11, the second pipe segment 12, and the third pipe segment 13 can be the same or different; no specific restrictions are imposed here. Among them, the fresh air duct 10 can be made of plastic.

[0058] According to the embodiment of the present utility model, the fresh air duct 10 is composed of a three-section structure. Since the second section 12 in the middle position is a corrugated pipe with bendable characteristics, the fresh air duct 10 can be bent and stored, which can reduce the packaging length of the fresh air duct 10, save space, facilitate the packaging and transportation of the fresh air duct 10, and reduce costs.

[0059] In some embodiments of this utility model, the center position of the second pipe segment 12 coincides with or is adjacent to the center position of the fresh air duct 10 along the length direction of the fresh air duct 10.

[0060] "The length direction of the fresh air duct 10" can refer to Figure 1 and Figure 2 The up and down directions.

[0061] In the above technical solution, the center position of the second pipe section 12 can coincide with the center position of the fresh air duct 10, or the center position of the second pipe section 12 can be set close to the center position of the fresh air duct 10. Thus, when the fresh air duct 10 bends through the second pipe section 12, it can be bent at the middle position, and the length of the fresh air duct 10 after bending can be smaller, which is more conducive to packaging and transportation.

[0062] In some embodiments of this utility model, such as Figures 1 to 3 , Figure 6 and Figure 8 As shown, the first pipe section 11 includes: a first part 111, a second part 112 and a third part 113. The first part 111 is a circular pipe and is provided with a threaded connection part 101. The second part 112 is connected to the second pipe section 12 and is provided with a clearance space 112a recessed toward the central axis of the first part 111. The third part 113 is arc-shaped to connect the first part 111 and the second part 112.

[0063] In the above technical solution, by setting the first part 111 as a round tube, its shape can be adapted to the connection of the conventional adapter 30, which can improve versatility, reduce cost, and facilitate the setting of the threaded connection part 101.

[0064] When using the fresh air duct 10, a hole 201 is usually pre-drilled in the wall 200 (see...). Figure 12The fresh air duct 10 passes through the through hole 201. A clearance space 112a is provided in the second part 112, recessed towards the central axis of the first part 111. The clearance space 112a allows other components to pass through the through hole 201 together with the second part 112. For example, when the fresh air assembly 100 is used in the air conditioner 100, the clearance space 112a of the second part 112 can be used to arrange the air conditioner's ducts and / or wiring harnesses. The ducts may include, but are not limited to, copper pipes, drain pipes, etc., and the wiring harnesses may include, but are not limited to, power cords, signal control lines, etc.

[0065] For example, such as Figure 4 As shown, the second part 112 can be a pipe with a circular tube portion that is recessed inward. Figure 4 The space formed between the dashed line portion and the outer wall contour of the second part 112 can refer to the clearance space 112a.

[0066] In conjunction with the above, in the above technical solution, since the second part 112 is provided with a clearance space 112a, the second part 112 is a pipe with an irregular structure. The third part 113 can refer to a smooth pipe section without sharp corners. The arc transition connection between the first part 111 and the second part 112 can be achieved through the third part 113, thereby improving the reliability of the first pipe section 11.

[0067] In some embodiments of the present invention, Figure 4 As shown, the second part 112 includes: a first semicircular wall 1121, a second semicircular wall 1122, and a transition wall 1123; the radius of the second semicircular wall 1122 is smaller than the radius of the first semicircular wall 1121, and it protrudes outward relative to the first semicircular wall 1121; the transition wall 1123 is located at opposite ends of the second semicircular wall 1122 and connects to the first semicircular wall 1121.

[0068] In the above technical solution, by configuring the second part 112 with the aforementioned structure, since the second semicircular wall 1122 protrudes outward relative to the first semicircular wall 1121, the cross-section of the second part 112 is the sum of the semicircular area of ​​the second semicircular wall 1122 and the semicircular area of ​​the first semicircular wall 1121. Therefore, the second part 112 has a larger air inlet cross-section, and the second semicircular wall 1122, transition wall 1123, and... Figure 4 The dashed lines can define a larger clearance space 112a, which is beneficial for arranging larger sizes or more numbers of pipes and wiring harnesses.

[0069] In some embodiments of the present invention, Figure 4As shown, the transition wall 1123 is connected to the first semicircular wall 1121 and the second semicircular wall 1122 by a circular arc transition. It can be understood that the above structure allows for a smoother transition between the first semicircular wall 1121, the transition wall 1123, and the second semicircular wall 1122 after the second part 112 is manufactured, which can reduce the risk of stress concentration, lower the probability of damage, and improve the overall reliability of the second part 112.

[0070] In some embodiments of this utility model, such as Figure 4 As shown, the centers of the first semicircular wall 1121 and the second semicircular wall 1122 coincide. This structure allows the second part 112 to have good overall symmetry and uniformity.

[0071] In some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the cross-section of the second pipe section 12 perpendicular to the central axis and the cross-section of the second part 112 perpendicular to the central axis have the same shape and coincide with each other; or, the cross-section of the second pipe section 12 perpendicular to the central axis and the cross-section of the third pipe section 13 perpendicular to the central axis have the same shape and coincide with the cross-section of the second part 112 perpendicular to the central axis.

[0072] refer to Figure 4 The cross-section of the second pipe section 12 perpendicular to the central axis and the cross-section of the second part 112 perpendicular to the central axis have the same shape and overlap. Thus, a clearance space 112a for arranging pipes and / or wire harnesses can also be formed on the second pipe section 12, which can bundle the pipes and / or wire harnesses together with the second pipe section 12 for easy construction.

[0073] In some embodiments of this utility model, the wall thickness of the second pipe section 12 is less than the wall thickness of the first pipe section 11 and the third pipe section 13.

[0074] Understandably, the thicker walls of the first and third pipe sections 11 and 13 ensure high rigidity and strength, improving the reliability of the fresh air duct 10 and making it less prone to damage. The thinner walls of the second pipe section 12 allow for greater flexibility, making it easier to bend.

[0075] In some embodiments of this utility model, such as Figure 7 As shown, the wall thickness of the first pipe section 11 is T1, the wall thickness of the second pipe section 12 is T2, and the wall thickness of the third pipe section 13 is T3, wherein 0.7mm≤T1≤1.2mm, 0.4mm≤T2≤0.8mm, and 0.7mm≤T3≤1.2mm.

[0076] T1 can be, but is not limited to, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, etc.

[0077] T2 can be, but is not limited to, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, etc.

[0078] T3 can be, but is not limited to, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, etc. The thicknesses of the first pipe section 11 and the third pipe section 13 can be equal or unequal; no specific restrictions are imposed here.

[0079] In the above technical solution, by setting the wall thickness of the first pipe section 11 and the third pipe section 13 within the aforementioned range, the first pipe section 11 and the third pipe section 13 can possess suitable rigidity and strength. By setting the wall thickness of the second pipe section 12 within the aforementioned range, the second pipe section 12 can possess suitable bending performance.

[0080] In some embodiments of the present invention, Figures 1 to 3 As shown, the threaded connection 101 is an external thread structure located on the outside of the first pipe section 11.

[0081] In the above technical solution, by setting the threaded connection part 101 as an external thread structure on the outside of the first pipe section 11, on the one hand, the external thread structure is not inside the first pipe section 11 and will not affect the air intake, which can make the inside of the first pipe section 11 have a larger cross section and make the air intake smoother. On the other hand, it can reduce the manufacturing difficulty of the threaded connection part 101 on the first pipe section 11, reduce the cost, and also facilitate the first pipe section 11 to be connected to the adapter 30.

[0082] In some embodiments of the present invention, Figure 4 As shown, the second pipe segment 12 is configured to be flexible and U-shaped. It can be understood that since the second pipe segment 12 is flexible and U-shaped, the entire fresh air duct 10 can also be bent into a U-shape. The length of the fresh air duct 10 after bending is smaller and the shape is more regular, which is more conducive to packaging and transportation.

[0083] Optionally, when the second pipe segment 12 is bent into a U-shape, the radius of the U-shape is R, and the length of the second pipe segment 12 is L, where L > π*R. That is, the length of the second pipe segment 12 must be greater than the length of the semicircle of the U-shape, thus ensuring that the second pipe segment 12 can be bent into a U-shape. For example, the radius R of the U-shape can be 80mm, and L can be 300mm.

[0084] like Figures 9 to 12As shown, a fresh air assembly 100 according to an embodiment of the present invention includes: a fresh air component 20, an adapter 30, and a fresh air duct 10. The fresh air component 20 is provided with an air inlet connector 21; the adapter 30 and the air inlet connector 21 are detachably connected; the fresh air duct 10 is any of the fresh air ducts 10 in the preceding embodiments, wherein the first duct segment 11 is threadedly connected to the adapter 30 through a threaded connection part 101.

[0085] The fresh air component 20 can refer to a component responsible for introducing outdoor fresh air and performing certain treatments. The air inlet connector 21 can refer to the pipe or interface structure of the fresh air component 20 for introducing fresh air. It should be noted that other components of the fresh air component 20 in this embodiment of the present invention can refer to fresh air components in related technologies. Their structure and operation are known to those skilled in the art and will not be described in detail here.

[0086] The adapter 30 may refer to the component used to connect the air inlet connector 21 and the fresh air duct 10.

[0087] In the above technical solution, the fresh air component 100 can be used indoors, with a through hole 201 pre-drilled in the wall 200 (see...). Figure 12 The fresh air duct 10 is installed through the through hole 201, and the fresh air component 20 is close to the wall 200.

[0088] According to the embodiment of the present utility model, the fresh air assembly 100 has the largest length dimension in the fresh air duct 10. After the fresh air duct 10 and the adapter 30 are disassembled, the fresh air duct 10 can be bent and stored in the packaging, which has a smaller packaging size and length. Therefore, the fresh air assembly 100 can be packaged more compactly, saving space and facilitating the packaging and transportation of the fresh air assembly 100.

[0089] In some embodiments of the present invention, Figure 11 As shown, the threaded connection part 101 is an external thread structure located on the outside of the first pipe section 11, and the adapter 30 is provided with an internal thread structure 31 on the inside. The internal thread structure 31 and the external thread structure are threadedly connected and engaged.

[0090] In the above technical solution, the connection structure between the first pipe section 11 and the adapter 30 is located on the outside of the first pipe section 11. This avoids the connection structure affecting air intake when located inside the first pipe section 11, ensuring that air intake inside the first pipe section 11 is unaffected and guaranteeing that the first pipe section 11 has a high air intake volume and efficiency. Moreover, while ensuring that the first pipe section 11 has a suitable air intake cross-section, the above structure only requires increasing the radial dimension of the adapter 30 to achieve the threaded connection between the first pipe section 11 and the adapter 30, without increasing the radial dimension of the first pipe section 11. Since the adapter 30 is relatively small, this method helps to reduce costs.

[0091] In some embodiments of the present invention, Figure 11 As shown, the adapter 30 is plugged into the air inlet connector 21. The adapter 30 is equipped with a spring clip 32, which can be snapped into the air inlet connector 21. It can be understood that, based on the plug-in connection between the adapter 30 and the air inlet connector 21, the spring clip 32 then snaps into the air inlet connector 21. This improves the reliability of the connection between the adapter 30 and the air inlet connector 21, and this connection method is relatively simple, easy to install and disassemble, and beneficial for later maintenance and repair.

[0092] The following is combined Figures 1 to 11 This describes a specific embodiment of the fresh air component 100 of this utility model.

[0093] A fresh air assembly 100 includes: a fresh air component 20, an adapter 30, and a fresh air duct 10.

[0094] The fresh air component 20 is equipped with an air inlet connector 21.

[0095] The adapter 30 and the air inlet connector 21 are detachably connected, and the adapter 30 has an internal thread structure 31 on its inner side.

[0096] The fresh air duct 10 includes: a first duct section 11, a second duct section 12 and a third duct section 13, one end of the second duct section 12 is connected to the first duct section 11 and is constructed as a flexible corrugated pipe; the third duct section 13 is connected to the other end of the second duct section 12.

[0097] The first pipe section 11 includes a first part 111, a second part 112, and a third part 113. The first part 111 is a round pipe and has a threaded connection part 101 on its outer side. The threaded connection part 101 is threadedly connected to the internal thread structure 31 of the adapter 30. The second part 112 is connected to the second pipe section 12 and has a clearance space 112a recessed towards the central axis of the first part 111. The third part 113 is arc-shaped to connect the first part 111 and the second part 112.

[0098] The second part 112 includes a first semicircular wall 1121, a second semicircular wall 1122, and a transition wall 1123. The radius of the second semicircular wall 1122 is smaller than the radius of the first semicircular wall 1121, and it protrudes outward relative to the first semicircular wall 1121. The transition wall 1123 is located at opposite ends of the second semicircular wall 1122 and connects to the first semicircular wall 1121. The transition wall 1123 is connected to the first semicircular wall 1121 and the second semicircular wall 1122 by a circular arc transition.

[0099] The wall thickness of the second pipe section 12 is less than that of the first pipe section 11 and the third pipe section 13. The second pipe section 12 is configured to be flexible and U-shaped.

[0100] An air conditioner according to an embodiment of the present invention includes a fresh air assembly 100 as described in the preceding embodiment.

[0101] According to the embodiments of the present invention, the air conditioner with fresh air component 100 can be packaged more compactly, saving space and making packaging and transportation more convenient, thereby reducing the transportation cost of the air conditioner.

[0102] Other components and operations of the air conditioner according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0103] In the description of this specification, references to terms such as "some embodiments," "optionally," "furthermore," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0104] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A new type of air duct, characterized in that, include: The first pipe section is provided with a threaded connection part; The second pipe section, one end of which is connected to the first pipe section, is constructed as a flexible corrugated pipe. The third pipe section is the other end of the second pipe section connected to the third pipe section.

2. The fresh air duct according to claim 1, characterized in that, Along the length of the fresh air duct, the center position of the second duct segment coincides with or is adjacent to the center position of the fresh air duct.

3. The fresh air duct according to claim 1 or 2, characterized in that, The first pipe section includes: The first part is a circular tube and is provided with the threaded connection part; The second part is connected to the second pipe segment, and the second part is provided with a clearance space recessed towards the central axis side of the first part; The third part is an arc-shaped transition connecting the first part and the second part.

4. The fresh air duct according to claim 3, characterized in that, The second part includes: First semi-circular wall; The second semicircular wall has a smaller radius than the first semicircular wall and protrudes outward relative to the first semicircular wall. A transition wall is provided at opposite ends of the second semicircular wall and connects to the first semicircular wall.

5. The fresh air duct according to claim 4, characterized in that, The centers of the first semicircular wall and the second semicircular wall coincide.

6. The fresh air duct according to claim 3, characterized in that, The cross-section of the second pipe segment perpendicular to the central axis and the cross-section of the second part perpendicular to the central axis have the same shape and coincide; or, the cross-section of the second pipe segment perpendicular to the central axis and the cross-section of the third pipe segment perpendicular to the central axis both have the same shape and coincide with the cross-section of the second part perpendicular to the central axis.

7. The fresh air duct according to claim 1, characterized in that, The wall thickness of the second pipe section is less than that of the first pipe section and the third pipe section.

8. The fresh air duct according to claim 7, characterized in that, The wall thickness of the first pipe section is T1, the wall thickness of the second pipe section is T2, and the wall thickness of the third pipe section is T3, wherein 0.7mm≤T1≤1.2mm, 0.4mm≤T2≤0.8mm, and 0.7mm≤T3≤1.2mm.

9. The fresh air duct according to claim 1, characterized in that, The threaded connection part is an external thread structure located on the outside of the first pipe section.

10. The fresh air duct according to any one of claims 1, 2, 7 to 9, characterized in that, The second pipe section is configured to be flexible and U-shaped.

11. A fresh air assembly, characterized in that, include: Fresh air component, wherein the fresh air component is provided with an air inlet connector; An adapter, wherein the adapter and the air inlet connector are detachably connected; The fresh air duct as described in any one of claims 1 to 10, wherein the first duct segment is threadedly connected to the adapter via the threaded connection portion.

12. The fresh air assembly according to claim 11, characterized in that, The threaded connection part is an external thread structure located on the outside of the first pipe section, and the adapter has an internal thread structure on its inner side. The internal thread structure and the external thread structure are threadedly connected and engaged.

13. An air conditioner, characterized in that, Includes the fresh air assembly as described in claim 11 or 12.

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