Air duct applied to seat and vehicle with same

Abstract

The application discloses a kind of air guide pipe applied to seat and vehicle with it, air guide pipe applied to seat includes: first shell, first shell has first air duct in, first shell is equipped with first air port;Second shell, second shell has second air duct in, second shell is equipped with second air port, second shell is arranged on first shell and first air duct and second air duct are communicated, first shell and second shell are rotatably sealed connection, so that the first air duct and the second air duct keep communication in the process of rotation.According to the air guide pipe applied to seat of embodiment of the application has the advantages that wind resistance is small, wind loss is low, wind volume is large, noise is small and the like.

Description

Technical Field

[0001] The invention relates to the field of vehicle engineering technology, and more specifically, to an air duct for a seat and a vehicle having an air duct for a seat. Background Technology

[0002] With the development of vehicle engineering, people have increasingly higher requirements for vehicle ride comfort, and seats directly affect ride comfort. Because the human body is in close contact with the seat, air circulation is poor, hindering the evaporation of sweat and easily causing discomfort. Seat ventilation effectively improves airflow between the human body and the seat, keeping the body dry and comfortable.

[0003] In the related technology of ventilated seats, an air source is set on the seat body, and the airflow is directed to the backrest through the air guide duct applied to the seat, so that the backrest can also achieve ventilation function. Since the backrest needs to be able to rotate, the air guide duct applied to the seat connecting the seat body and the backrest needs to use a corrugated pipe to adapt to the rotation of the seat. However, the corrugated pipe has high wind resistance, large wind loss and is prone to noise. Summary of the Invention

[0004] The invention aims to solve at least one of the technical problems existing in the prior art. To this end, the invention proposes an air duct for use in seats, which has the advantages of low wind resistance, low wind loss, large air volume, and low noise.

[0005] The invention also proposes a vehicle with air ducts for use with seats.

[0006] To achieve the above objectives, according to an embodiment of the first aspect of the invention, an air duct for use in a seat is provided, applicable to a vehicle. The air duct for use in a seat includes: a first housing having a first air duct and a first air outlet. The second housing has a second air duct and a second air outlet. The second housing is disposed on the first housing and the first air duct is connected to the second air duct. The first housing and the second housing are coaxially arranged and rotatably sealed together to form a rotating cavity pair, so that the first air duct and the second air duct remain connected during rotation; Furthermore, during the rotation, at least a portion of the structure of the first housing is transferred into the interior of the second housing.

[0007] The air duct applied to the seat according to the embodiments of the invention has the advantages of low wind resistance, low wind loss, large air volume, and low noise.

[0008] In addition, the air duct applied to the seat according to the above embodiments of the invention may also have the following additional technical features: According to one embodiment of the invention, the seat includes a seating part and a rotating part. The rotating part is rotatably disposed on the seating part. The seating part is provided with a seating part air duct, and the rotating part is provided with a rotating part air duct. A first air vent is connected to the seating part air duct, and a second air vent is connected to the rotating part air duct. The relative rotation axes of the first housing and the second housing are coaxially arranged with the rotation axis of the rotating part.

[0009] According to one embodiment of the invention, the rotating part is a backrest or leg rest.

[0010] According to one embodiment of the invention, an annular cavity is formed inside one of the first housing and the second housing, and an opening is formed on the outer wall surface of the annular cavity, and the other of the first housing and the second housing is rotatably fitted into the opening.

[0011] According to one embodiment of the invention, the second housing includes an inner shell, an outer shell, two end plates, and a second air guide. Both the inner shell and the outer shell are annular. The inner shell is located radially inside the outer shell and is spaced apart from the outer shell to define an annular cavity between the inner shell and the outer shell. The end plates are respectively connected to the outer shell and the inner shell. The second air guide is located on the outer shell and communicates with the annular cavity, with an opening on the outer shell. The first housing includes a first air guide and an arc-shaped portion. The first air guide is connected to the arc-shaped portion. The arc-shaped portion is rotatably located in the annular cavity and seals the opening. The first air guide is communicated with the annular cavity.

[0012] According to one embodiment of the invention, the inner shell includes two sub-inner shells, both of which are semi-circular arc-shaped, the outer shell includes two sub-outer shells, and each end plate includes two sub-end plates.

[0013] According to one embodiment of the invention, the second air guide extends tangentially along the annular cavity.

[0014] According to one embodiment of the invention, both the first housing and the second housing are provided with lugs.

[0015] According to one embodiment of the invention, the relative rotation angle between the first housing and the second housing is greater than or equal to 90 degrees.

[0016] According to an embodiment of a second aspect of the invention, a vehicle is provided, the vehicle including an air duct applied to a seat according to an embodiment of a first aspect of the invention.

[0017] The vehicle according to the embodiments of the invention, by utilizing the air duct applied to the seat according to the first aspect of the invention, has advantages such as low air resistance, low wind loss, large air volume, and low noise in the seat air supply.

[0018] Additional aspects and advantages of the 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.

[0019] The beneficial effects of this invention are as follows: Traditional bellows have a periodic concave-convex structure on their inner wall, which inevitably generates vortices and local resistance when airflow passes through, resulting in high wind resistance and high energy loss. In this invention, the air ducts inside the first and second housings are both smooth curved surfaces, especially the second air guide extending tangentially along the annular cavity, allowing for a smooth airflow transition without sudden expansion, contraction, or sharp bends. Furthermore, this application utilizes a coaxial rotating cavity pair instead of a bellows, resulting in laminar or low-turbulence airflow within the annular cavity and straight air ducts. Moreover, the first and second housings are coaxially arranged, with the first housing rotating into the annular cavity of the second housing, and their relative rotation axes coinciding with the rotation axis of the seat's rotating part. This coaxial rotating fit structure ensures that the air passage remains connected during rotation, without interference or the risk of separation. The relative rotation angle can reach 90° or even 120°, fully meeting the adjustment range of the backrest and leg rest. Simultaneously, the shape of the annular cavity remains constant during rotation, unlike bellows which experience additional resistance or fatigue damage due to expansion and contraction, thus ensuring functional stability over long-term use. Vortices are significantly reduced. Attached Figure Description The above and / or additional aspects and advantages of the invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of an air duct applied to a seat according to an embodiment of the invention, wherein the first housing is shown in a partial cross-sectional view to illustrate the first air duct.

[0020] Figure 2 This is a schematic diagram of the structure of an air duct applied to a seat according to an embodiment of the invention, wherein (a) and (b) show a first housing and a second housing at different relative angles, respectively.

[0021] Figure 3 This is an exploded view of an air duct applied to a seat according to an embodiment of the invention.

[0022] Figure 4 This is an exploded view of an air duct applied to a seat according to an embodiment of the invention.

[0023] Figure 5 This is a partial cross-sectional view of an air duct applied to a seat according to an embodiment of the invention, wherein (a) and (b) show a first housing and a second housing at different relative angles, respectively.

[0024] Figure 6 This is a cross-sectional view of the air duct applied to the seat according to an embodiment of the invention, and the seat in which it is located.

[0025] Figure 7 This is a cross-sectional view of the air duct applied to the seat according to an embodiment of the invention, and the seat in which it is located.

[0026] Figure 8This is a schematic diagram of the air duct applied to the seat and a partial structure of the seat according to an embodiment of the invention.

[0027] Reference numerals: 1. Air duct for seat; 10. First housing; 11. First air outlet; 12. First air guide section; 13. Arc-shaped section; 14. First air duct; 20. Second housing; 21. Second air outlet; 22. Annular cavity; 23. Opening; 24. Inner housing; 241. Sub-inner housing; 25. Outer housing; 251. Sub-outer housing; 252. Stop edge; 26. End plate; 261. Sub-end plate; 27. Second air guide section; 28. Second air duct; 30. Lug; 2. Seat; 3. Seating section; 4. Rotating section; 5. Seating section air duct; 6. Rotating section air duct; 7. Fan. Detailed Implementation

[0028] Embodiments of the invention are described in detail below, examples of which 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 the invention, and should not be construed as limiting the invention.

[0029] In the description of the invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not 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 on the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the invention, unless otherwise stated, "a plurality of" means two or more. In the description of the invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 the invention according to the specific circumstances.

[0030] The following description, with reference to the accompanying drawings, describes an air duct 1 applied to a seat according to an embodiment of the invention.

[0031] like Figures 1-8As shown, the air duct 1 applied to the seat according to an embodiment of the invention includes a first housing 10 and a second housing 20.

[0032] The first housing 10 has a first air duct 14 inside and a first air outlet 11 on the first housing 10. The second housing 20 has a second air duct 28 inside and a second air outlet 21 on the second housing 20. The second housing 20 is disposed on the first housing 10 and the first air duct 14 communicates with the second air duct 28. The first housing 10 and the second housing 20 are rotatably and sealingly connected so that the first air duct 14 and the second air duct 28 remain connected during rotation.

[0033] Specifically, such as Figure 2 As shown in (a) and (b), the first housing 10 and the second housing 20 can rotate relative to each other, and the relative positions of the first air vent 11 and the second air vent 21 change during the rotation.

[0034] An air duct 1 for use on the seat is installed on the seat 2, and the first air outlet 11 and the second air outlet 21 are respectively connected to the air ducts of two relatively rotatable parts of the seat 2.

[0035] For example, such as Figures 6-8 As shown, the seat 2 may include a seating section 3 and a rotating section 4. The seating section 3 is suitable for sitting, and the rotating section 4 may be a backrest or leg rest. A fan 7 is provided on the seating section 3, and a seating section air duct 5 is provided inside the seating section 3. A rotating section air duct 6 is provided inside the rotating section 4. The seating section air duct 5 is connected to the inlet of the fan 7, the outlet of the fan 7 is connected to the first air outlet 11, and the second air outlet 21 is connected to the rotating section air duct 6. The inlet of the fan 7 draws air in through the seating section air duct 5, and the drawn-in airflow is blown out through the outlet of the fan 7 and reaches the rotating section air duct 6 through the air guide duct 1 applied to the seat, thus ventilating the rotating section 4. When the rotating section 4 rotates relative to the seating section 3, the second housing 20 rotates relative to the first housing 10 to accommodate the relative rotation of the seating section 3 and the rotating section 4.

[0036] Figures 6-8 The illustration shows an embodiment in which the seating section 3 is equipped with a fan for air intake and the rotating section 4 for air blowing. The air duct 1 applied to the seat can also be used for other ventilation methods such as: the seating section 3 blowing air and the rotating section 4 blowing air; the seating section 3 blowing air and the rotating section 4 intake air; the seating section 3 intake air and the rotating section 4 blowing air; the seating section 3 intake air and the rotating section 4 intake air.

[0037] The fan 7 can be a single-outlet fan, a multi-outlet fan, a single-inlet fan, or a multi-inlet fan.

[0038] According to the embodiment of the invention, the air duct 1 applied to the seat, by setting a first housing 10 and a second housing 20, allows the first housing 10 and the second housing 20 to rotate relative to each other. The air duct 1 can connect the air ducts of two relatively rotating parts of the seat, achieving ventilation for these two parts. Furthermore, when the two parts of the seat rotate relative to each other, the first housing 10 and the second housing 20 can rotate relative to each other accordingly. For example, the air duct 1 can connect the seat air duct and the backrest air duct. Compared to the related technology that uses corrugated pipes to connect the seat air duct and the backrest air duct, this avoids the use of corrugated pipes, prevents turbulence during air supply, and avoids the problems of high wind resistance, high wind loss, and high noise caused by using corrugated pipes. This reduces wind resistance and wind loss during seat ventilation, increases air volume, and reduces air supply noise.

[0039] Therefore, the air duct 1 applied to the seat according to the embodiment of the invention has the advantages of low wind resistance, low wind loss, large air volume, and low noise.

[0040] The following description, with reference to the accompanying drawings, describes an air duct 1 applied to a seat according to a specific embodiment of the invention.

[0041] In some specific embodiments of the invention, such as Figures 1-8 As shown, the air duct 1 applied to the seat according to an embodiment of the invention includes a first housing 10 and a second housing 20.

[0042] To achieve smooth, low-friction relative rotation and ensure the continuity of the airflow channel, the first housing 10 and the second housing 20 are coaxially arranged. Specifically, the central axis of the first housing 10 coincides with the central axis of the second housing 20, and together they form a rotating cavity pair. This rotating cavity pair refers to the annular space defined by the mating parts of the first housing 10 and the second housing 20, allowing relative rotation between them. Within this rotating cavity pair, there is a small gap (typically 0.1mm to 0.5mm) between the mating surfaces of the first housing 10 and the second housing 20, which ensures flexible rotation and prevents air leakage through subsequent sealing structures.

[0043] In a preferred embodiment of the present invention, the rotational engagement between the first housing 10 and the second housing 20 adopts an "outer-to-inner" or "inner-to-inner" structure. Specifically, as shown... Figures 1-5As shown, at least a portion of the structure of the first housing 10 rotates into the interior of the second housing 20 during rotation. More specifically, the arcuate portion 13 of the first housing 10 is rotatably fitted within the annular cavity 22 of the second housing 20, and the arcuate portion 13 rotates into the interior of the annular cavity 22 from the opening 23. When the first housing 10 rotates relative to the second housing 20, the arcuate portion 13 slides along the inner wall of the annular cavity 22, and the radially inner side of the arcuate portion 13 is limited by the stop edge 252, thereby ensuring that the arcuate portion 13 remains inside the annular cavity 22 and does not come out. This rotating fit ensures that the axial length of the entire air duct 1 remains substantially constant during rotation, avoiding the impact of the length change of the bellows during expansion and contraction on the interior space of the seat, while improving the compactness of the structure.

[0044] To ensure the airtightness of the first housing 10 and the second housing 20 during relative rotation and to prevent air leakage from the rotating mating surface, this invention provides a reliable sealing structure at the rotating cavity pair. Optionally, a sealing groove is provided on the contact surface between the arc-shaped portion 13 and the annular cavity 22, and a sealing ring (not shown in the figure) is provided in the sealing groove. Specifically, the sealing groove can be provided on the outer circumferential surface of the arc-shaped portion 13, and is annular or spiral in shape. The sealing ring is made of a low-friction, wear-resistant elastic material, such as silicone rubber, fluororubber, or polyurethane. The cross-sectional shape of the sealing ring can be O-shaped, X-shaped, or rectangular, wherein the X-shaped sealing ring has two lips, which can provide a good sealing effect in both directions and reduce rotational resistance. In addition, a sealing groove can also be provided on the inner wall of the annular cavity 22, or multiple seals can be provided simultaneously. The compression ratio of the sealing ring is controlled between 15% and 25%, which ensures the sealing effect without hindering rotation due to excessive friction. After durability testing, this sealing structure can still maintain airtightness after 100,000 reciprocating rotations, with a leakage rate of less than 5%.

[0045] Specifically, such as Figures 6-8 As shown, the seat 2 includes a seating section 3 and a rotating section 4. The rotating section 4 is rotatably mounted on the seating section 3. The seating section 3 has a seating section air duct 5, and the rotating section 4 has a rotating section air duct 6. A first air vent 11 communicates with the seating section air duct 5, and a second air vent 21 communicates with the rotating section air duct 6. The relative rotation axes of the first housing 10 and the second housing 20 are coaxial with the rotation axis of the rotating section 4. This not only facilitates the synchronous rotation of the second housing 20 and the rotating section 4, but also prevents the first housing 10 from shifting relative to the seating section 3 and the second housing 20 from shifting relative to the rotating section 4 during rotation. This facilitates the fixing of the positions of the first housing 10 and the second housing 20, facilitates the installation of the air duct 1 used in the seat, improves the stability and reliability of the air duct 1 used in the seat after installation, and prevents the air duct 1 used in the seat from shaking, thus avoiding noise caused by shaking.

[0046] Optionally, the rotating part 4 can be a backrest or leg rest. This facilitates ventilation of the backrest or leg rest, improving human comfort.

[0047] Of course, the seat 2 can also include a backrest and a leg rest at the same time. A fan 7 on the seating part 3 can send air to the backrest and the leg rest respectively through two air ducts 1 applied to the seat.

[0048] Figures 1-5 An air duct 1 applied to a seat is shown according to some examples of the invention. For example... Figures 1-5 As shown, an annular cavity 22 is formed in one of the first housing 10 and the second housing 20, and an opening 23 is formed on the outer wall surface of the annular cavity 22. The other of the first housing 10 and the second housing 20 is rotatably fitted into the opening 23. Figures 1-5 The diagram shows an embodiment where the annular cavity 22 is disposed on the second housing 20, and the first housing 10 is rotatably fitted within the opening 23. This facilitates the relative rotation of the first housing 10 and the second housing 20, and by providing the annular cavity 22, the shape of the annular cavity 22 does not change when the first housing 10 and the second housing 20 rotate relative to each other. This avoids the relative rotation of the first housing 10 and the second housing 20 affecting the air guiding effect of the air duct 1 applied to the seat, thereby ensuring a stable and uniform airflow within the air duct 1 applied to the seat.

[0049] Specifically, such as Figures 1-5 As shown, the second housing 20 includes an inner housing 24, an outer housing 25, two end plates 26, and a second air guide 27. Both the inner housing 24 and the outer housing 25 are annular. The inner housing 24 is located radially inside the outer housing 25 and is spaced apart from the outer housing 25 to define an annular cavity 22 between the inner housing 24 and the outer housing 25. The end plates 26 are connected to the outer housing 25 and the inner housing 24, respectively. The second air guide 27 is located on the outer housing 25 and communicates with the annular cavity 22. An opening 23 is located on the outer housing 25. The first housing 10 includes a first air guide 12 and an arc-shaped portion 13. The first air guide 12 is connected to the arc-shaped portion 13. The arc-shaped portion 13 is rotatably located in the annular cavity 22 and covers the opening 23. The first air guide 12 communicates with the annular cavity 22. This facilitates the formation of the annular cavity 22 and allows the first housing 10 and the second housing 20 to rotate relative to each other, ensuring that the opening 23 remains sealed during the relative rotation of the first housing 10 and the second housing 20, and ensuring that the airflow passes through the first air vent 11 and the second air vent 21.

[0050] Specifically, such as Figure 3 and Figure 5As shown, the end plate 26 is provided with a stop edge 252, which is arc-shaped and stops on the radially inner side of the arc-shaped portion 13. In this way, the stop edge 252 can be used to position and guide the arc-shaped portion 13 during rotation, preventing the arc-shaped portion 13 from shifting radially, improving the stability of the first housing 10 and the second housing 20 during relative rotation, and improving the sealing of the opening 23 during rotation.

[0051] More specifically, such as Figures 3-5 As shown, the inner shell 24 includes two sub-inner shells 241, both of which are semi-circular arcs. The outer shell 25 includes two sub-outer shells 251, and each end plate 26 includes two sub-end plates 261. This facilitates the formation of the annular inner shell 24 and outer shell 25, reducing the manufacturing difficulty of individual parts.

[0052] Specifically, a sub-shell 251 can be integrally formed with two sub-end plates 261, the second air guide 27 is integrally formed on one of the sub-shells 251, and the sub-inner shell 241 can be snapped together with the sub-end plate 261. This facilitates the reduction of the number of parts and improves assembly efficiency.

[0053] Optionally, a sealing groove is provided on the contact surface between the arc-shaped portion 13 and the annular cavity 22, and a sealing ring (not shown in the figure) is provided in the sealing groove to ensure the airtightness of the first housing 10 and the second housing 20 during relative rotation.

[0054] Advantageously, such as Figures 1-4 As shown, the second air guide 27 extends tangentially along the annular cavity 22. This reduces the resistance of the airflow when it passes through the connection between the annular cavity 22 and the second air guide 27, further reducing the overall wind resistance of the air guide duct 1 applied to the seat, further reducing the wind loss of the air guide duct 1 applied to the seat, and increasing the air volume delivered by the air guide duct 1 applied to the seat.

[0055] More advantageously, such as Figures 1-4 As shown, both the first housing 10 and the second housing 20 are provided with lugs 30. Specifically, the first housing 10 and the second housing 20 can be mounted on the seat 2 by fasteners that fit into the lugs 30. This facilitates the installation of the air duct 1 used in the seat on the seat 2.

[0056] To prevent the relative rotation between the first housing 10 and the second housing 20 from exceeding the design range, which could lead to sealing failure or pipe detachment, the present invention may also include a limiting structure. For example, a protruding limiting block is provided at the circumferential end of the arc-shaped portion 13, and a corresponding limiting stop is provided on the inner wall of the annular cavity 22. When the rotation angle reaches a preset maximum value, the limiting block and the limiting stop abut against each other, preventing further rotation.

[0057] Optionally, the relative rotation angle between the first housing 10 and the second housing 20 is greater than or equal to 90 degrees. Specifically, Figure 6 and Figure 7 The relative angle between the seating section 3 and the rotating section 4 of the seat 2, where the air duct 1 applied to the seat is located, is shown. Figure 6 The mean angle α is 90 degrees. Figure 7 The midpoint angle b is 180 degrees. The rotating part 4 is located opposite the seating part 3. Figure 6 Position rotated to Figure 7 During the positioning process, the rotating part 4 rotates 90 degrees relative to the seating part 3, while the second housing 20 rotates 90 degrees relative to the first housing 10. This allows the air duct 1 applied to the seat to adapt to the rotation angles of the seating part 3 and the rotating part 4.

[0058] The vehicle according to an embodiment of the invention is described below. The vehicle according to an embodiment of the invention includes an air duct 1 applied to a seat according to the above embodiment of the invention.

[0059] The vehicle according to the embodiments of the invention has the advantages of low air resistance, low wind loss, large air volume, and low noise by utilizing the air duct 1 applied to the seat according to the above embodiments of the invention.

[0060] like Figures 1-4 As shown, both the first housing 10 and the second housing 20 are provided with lugs 30. Specifically, the first housing 10 and the second housing 20 can be mounted on the seat 2 using fasteners that fit within the lugs 30. The fasteners can be self-tapping screws, bolts and nuts, or plastic clips. The position and number of lugs 30 can be flexibly set according to the internal space of the seat, typically 2 to 3 lugs are provided on each housing. This facilitates the secure installation of the air duct 1 applied to the seat at the corresponding positions of the seating part 3 and the rotating part 4 of the seat 2. During installation, it should be ensured that the rotation axis of the first housing 10 is coaxial with the rotation axis of the rotating part 4 to avoid generating additional torque. In addition, anti-rotation positioning grooves can be provided on the outer wall of the first housing 10 or the second housing 20, which cooperate with the positioning ribs on the seat frame to prevent the housing from loosening during long-term vibration.

[0061] To further reduce wind resistance and noise, the internal shape of the airflow channel is optimized in this invention. The inner walls of both the first air guide 12 and the second air guide 27 are smooth curved surfaces, without sharp corners or abrupt cross-sections. Specifically, as... Figures 1-4As shown, the second air guide section 27 extends tangentially along the annular cavity 22. This allows the airflow to smoothly transition direction as it enters the annular cavity 22 from the second air guide section 27, avoiding vortices and energy loss caused by vertical impact. Experiments show that the tangential extension design reduces wind resistance by approximately 15% and increases airflow by approximately 10% compared to the radial extension design. Similarly, the first air guide section 12 preferably extends tangentially along the arcuate section 13. The cross-sectional areas of the first air duct 14 and the second air duct 28 remain uniform or gradually contract along the airflow direction to maintain stable flow velocity.

[0062] Other configurations and operations of the vehicle according to the embodiments of the invention are known to those skilled in the art and will not be described in detail here.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," 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 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.

[0064] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A ductwork (1) for use in a seat, characterized in that, include: The first housing (10) has a first air duct (14) and a first air outlet (11). The second housing (20) has a second air duct (28) and a second air outlet (21) inside. The second housing (20) is disposed on the first housing (10) and the first air duct (14) is connected to the second air duct (28). The first housing (10) and the second housing (20) are coaxially arranged and rotatably sealed together to form a rotating cavity pair, so that the first air duct (14) and the second air duct (28) remain connected during rotation; Furthermore, during the rotation, at least a portion of the structure of the first housing (10) is transferred into the interior of the second housing (20).

2. The air duct (1) applied to a seat according to claim 1, characterized in that, The seat (2) includes a seating part (3) and a rotating part (4). The rotating part (4) is rotatably disposed on the seating part (3). The seating part (3) is provided with a seating part air duct (5). The rotating part (4) is provided with a rotating part air duct (6). The first air vent (11) is connected to the seating part air duct (5) and the second air vent (21) is connected to the rotating part air duct (6). The relative rotation axis of the first housing (10) and the second housing (20) is coaxial with the rotation axis of the rotating part (4).

3. The air duct (1) applied to a seat according to claim 2, characterized in that, The rotating part (4) is a backrest or leg rest.

4. The air duct (1) applied to a seat according to claim 1, characterized in that, An annular cavity (22) is formed in one of the first housing (10) and the second housing (20), and an opening (23) is formed on the outer wall surface of the annular cavity (22). The other of the first housing (10) and the second housing (20) is rotatably fitted into the opening (23).

5. The air duct (1) applied to a seat according to claim 4, characterized in that, The second housing (20) includes an inner shell (24), an outer shell (25), two end plates (26), and a second air guide (27). Both the inner shell (24) and the outer shell (25) are annular. The inner shell (24) is located radially inside the outer shell (25) and spaced apart from it to define the annular cavity (22) between the inner shell (24) and the outer shell (25). The end plates (26) are connected to both the outer shell (25) and the inner shell (24). The second air guide (27) is provided on the outer shell (25) and communicates with the annular cavity (22). The opening (23) is provided on the outer shell (25). The first shell (10) includes a first air guide (12) and an arc-shaped part (13). The first air guide (12) is connected to the arc-shaped part (13). The arc-shaped part (13) is rotatably provided in the annular cavity (22) and covers the opening (23). The first air guide (12) communicates with the annular cavity (22).

6. The air duct (1) applied to a seat according to claim 5, characterized in that, The inner shell (24) includes two sub-inner shells (241), both of which are semi-circular arcs. The outer shell (25) includes two sub-outer shells (251), and each end plate (26) includes two sub-end plates (261).

7. The air duct (1) applied to a seat according to claim 5, characterized in that, The second air guide (27) extends tangentially along the annular cavity (22).

8. The air duct (1) applied to a seat according to claim 2, characterized in that, Both the first housing (10) and the second housing (20) are provided with lugs (30).

9. The air duct (1) applied to a seat according to claim 1, characterized in that, The relative rotation angle between the first housing (10) and the second housing (20) is greater than or equal to 90 degrees.

10. A vehicle, characterized in that, Includes the air duct (1) applied to the seat according to any one of claims 1-9.

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