A flow guiding structure, a luggage rack and a vehicle

Abstract

The present invention discloses a flow guiding structure, a roof rack and a vehicle, relating to the technical field of vehicles, and aiming to solve the problem of relatively large noise generated when air flows through the roof rack. The flow guiding structure includes an air outlet portion, and the air outlet portion is located at one end of the flow guiding structure facing the rear of the vehicle; the cross-section of the air outlet portion gradually decreases along a first direction.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular, to a flow guiding structure, a roof rack and a vehicle. Background Art

[0002] The roof rack of a vehicle is usually provided on the top of the vehicle body. The roof rack is usually composed of a frame and a plurality of cross bars. During the driving of the vehicle, air will blow onto the roof rack, thus generating noise. In the related art, the roof rack usually does not take noise reduction measures, resulting in a relatively large noise on the roof of the vehicle during driving, which affects the driving experience of users. Summary of the Invention

[0003] The purpose of the present invention is to provide a flow guiding structure, a roof rack and a vehicle, aiming to solve the problem of relatively large noise generated when air flows through the roof rack.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] In the first aspect of the present application, a flow guiding structure is provided for the cross beam of a vehicle roof rack. The flow guiding structure includes an air outlet part, and the air outlet part is located at one end of the flow guiding structure facing the rear of the vehicle. The cross section of the air outlet part gradually decreases along the first direction.

[0006] Through the above setting, since the first sub-air outlet part and the second sub-air outlet part are asymmetrically arranged along the second direction, the offset amount of the air flowing out from the first sub-air outlet part relative to the first direction is different from the offset amount of the air flowing out from the second sub-air outlet part relative to the first direction. When the air flowing out from the first sub-air outlet part converges with the air flowing out from the second sub-air outlet part, the converged air will tilt towards the first sub-air outlet part or the second sub-air outlet part.

[0007] In this way, compared with the case where the first sub-air outlet part and the second sub-air outlet part are symmetrically arranged along the second direction, when the first sub-air outlet part and the second sub-air outlet part are asymmetrically arranged along the second direction, the impact between the air flowing out from the first sub-air outlet part and the air flowing out from the second sub-air outlet part can be further reduced, thereby further reducing the generation of eddy currents, further reducing the magnitude of the noise when air flows through the flow guiding structure, improving the noise reduction effect of the flow guiding structure, and further improving the user experience of using the vehicle.

[0008] In some embodiments, the air outlet part has a first sub-air outlet part and a second sub-air outlet part arranged oppositely, the first sub-air outlet part and the second sub-air outlet part are asymmetrically arranged along the second direction, and the second direction intersects with the first direction.

[0009] In some embodiments, the first sub-outlet portion has a first air guiding surface, and the second sub-outlet portion has a second air guiding surface, and the first air guiding surface and the second air guiding surface are arranged opposite to each other. The first air guiding surface includes a first air inlet end and a first air outlet end arranged along a second direction, and the second air guiding surface includes a second air inlet end and a second air outlet end arranged along the second direction. Along the second direction, the distance between the first air inlet end and the first air outlet end is a first vertical distance, and the distance between the second air inlet end and the second air outlet end is a second vertical distance, wherein the first vertical distance and the second vertical distance are not equal. And / or, along a first direction, the distance between the first air inlet end and the first air outlet end is a first front-back distance, and the distance between the second air inlet end and the second air outlet end is a second front-back distance, and the first front-back distance and the second front-back distance are not equal.

[0010] In some embodiments, the first vertical distance is greater than the second vertical distance.

[0011] In some embodiments, the ratio of the first vertical distance to the maximum dimension of the flow guiding structure in the second direction is greater than or equal to 0.25 and less than or equal to 0.6.

[0012] In some embodiments, the ratio of the second vertical distance to the maximum dimension of the flow guiding structure in the second direction is greater than or equal to 0.3 and less than or equal to 0.5.

[0013] In some embodiments, the first front-back distance is greater than the second front-back distance.

[0014] In some embodiments, the ratio of the first front-back distance to the maximum dimension of the flow guiding structure in the second direction is greater than or equal to 1 and less than or equal to 3.

[0015] In some embodiments, the ratio of the second front-back distance to the maximum dimension of the flow guiding structure in the second direction is greater than or equal to 0.5 and less than or equal to 2.

[0016] In some embodiments, the ratio of the first vertical distance to the first front-back distance is greater than or equal to 0.15 and less than or equal to 0.4.

[0017] In some embodiments, the outlet portion further includes a first transition surface, and the first transition surface is connected between the first air outlet end and the second air outlet end.

[0018] In some embodiments, along the second direction, the ratio of the distance between the two ends of the first transition surface to the maximum dimension of the flow guiding structure is greater than or equal to 0.1 and less than or equal to 0.25.

[0019] In some embodiments, the first vertical distance is negatively correlated with the distance between the two ends of the first transition surface in the second direction.

[0020] In some embodiments, the first front-back spacing is negatively correlated with the spacing between the two ends of the first transition surface in the second direction.

[0021] In some embodiments, the first air guiding surface is an arc surface convex in the direction away from the second air guiding surface. The second air guiding surface is an arc surface convex in the direction away from the first air guiding surface.

[0022] In some embodiments, the air guiding structure further includes an air inlet portion, which is located at one end of the air guiding structure facing the front of the vehicle. The cross-section of the air inlet portion gradually increases in the first direction.

[0023] In some embodiments, the air inlet portion has a first sub-air inlet portion and a second sub-air inlet portion arranged oppositely, and the first sub-air inlet portion and the second sub-air inlet portion are symmetrically arranged in the second direction.

[0024] In some embodiments, the first sub-air inlet portion has a third air guiding surface, and the second sub-air inlet portion has a fourth air guiding surface, and the third air guiding surface and the fourth air guiding surface are arranged oppositely. The third air guiding surface includes a third air inlet end and a third air outlet end arranged in the second direction. The fourth air guiding surface includes a fourth air inlet end and a fourth air outlet end arranged in the second direction. In the second direction, the spacing between the third air inlet end and the third air outlet end is the third up-down spacing, and the spacing between the fourth air inlet end and the fourth air outlet end is the fourth up-down spacing, and the third up-down spacing is equal to the fourth up-down spacing. In the first direction, the spacing between the third air inlet end and the third air outlet end is the third front-back spacing, and the spacing between the fourth air inlet end and the fourth air outlet end is the fourth front-back spacing. The third front-back spacing is equal to the fourth front-back spacing.

[0025] In some embodiments, the ratio of the third front-back spacing to the maximum dimension of the air guiding structure in the second direction is greater than or equal to 0.8 and less than or equal to 2.5.

[0026] In some embodiments, the ratio of the third up-down spacing to the maximum dimension of the air guiding structure in the second direction is greater than or equal to 0.3 and less than or equal to 0.5.

[0027] In some embodiments, the ratio of the third up-down spacing to the third front-back spacing is greater than or equal to 0.2 and less than or equal to 0.4.

[0028] In some embodiments, the third air guiding surface is an arc surface convex in the direction away from the fourth air guiding surface. The fourth air guiding surface is an arc surface convex in the direction away from the third air guiding surface.

[0029] In some embodiments, the air guiding structure further includes a buffer portion, which is arranged between the air inlet portion and the air outlet portion, and the maximum dimension of the buffer portion in the second direction is the maximum dimension of the air guiding structure in the second direction.

[0030] In some embodiments, along the second direction, one side surface of the buffer portion is the second transition surface, and the other side surface of the buffer portion is the third transition surface.

[0031] The second transition surface is connected to the first air guiding surface and is also connected to the third air guiding surface. The third transition surface is connected to the second air guiding surface and is also connected to the fourth air guiding surface.

[0032] In some embodiments, the second transition surface is a plane and is perpendicular to the second direction. The third transition surface is a plane and is perpendicular to the second direction.

[0033] In a second aspect of the present application, there is provided a luggage rack, including a cross beam, and the cross beam includes the above-mentioned air guiding structure.

[0034] In some embodiments, there are at least two cross beams. The at least two cross beams include a first cross beam and a second cross beam. The first cross beam and the second cross beam are spaced apart in the vehicle front-rear direction. The first cross beam is located at the front end of the luggage rack, and the second cross beam is located between the front end and the rear end of the luggage rack.

[0035] In some embodiments, the luggage rack further includes longitudinal beams. There are at least two longitudinal beams. The at least two longitudinal beams are spaced apart in the vehicle width direction, and the longitudinal beams are connected to the cross beams.

[0036] In some embodiments, the luggage rack further includes a border member. The border member is connected to one side of the first cross beam facing the rear of the vehicle. The border member surrounds the longitudinal beams and forms a border with the first cross beam.

[0037] In some embodiments, the luggage rack further includes a border member and longitudinal beams. The border member is connected to one side of the cross beam facing the rear of the vehicle. The border member and the cross beam enclose a border. The border member includes a fixing rod, and the fixing rod is located at the rear end of the luggage rack. There are at least two longitudinal beams. The at least two longitudinal beams are spaced apart in the vehicle width direction, and the longitudinal beams are connected between the cross beam and the fixing rod.

[0038] In some embodiments, the luggage rack further includes a border member. The border member forms a border, and the cross beam is disposed within the border.

[0039] In a third aspect of the present application, there is provided a vehicle, including a vehicle body and the above-mentioned luggage rack, and the luggage rack is disposed on the vehicle body.

[0040] In some embodiments, the luggage rack is connected to the top of the vehicle body. The air outlet part has a first air guiding surface and a second air guiding surface oppositely arranged along a second direction. The first air guiding surface includes a first air inlet end and a first air outlet end arranged along the second direction, and the second air guiding surface includes a second air inlet end and a second air outlet end arranged along the second direction. The air guiding structure further includes an air inlet part located at one end of the air guiding structure facing the front of the vehicle. The air inlet part 2 has a third air guiding surface and a fourth air guiding surface oppositely arranged along the second direction. The third air guiding surface includes a third air inlet end and a third air outlet end arranged along the second direction. The fourth air guiding surface includes a fourth air inlet end and a fourth air outlet end arranged along the second direction. The midpoint of the connection line between the first air outlet end and the second air outlet end is point B, the midpoint of the connection line between the third air inlet end and the fourth air inlet end is point C, and the included angle between the connection line between point B and point C and the horizontal line is the installation angle α. A point D is set at a preset distance e in the front direction of the vehicle from point C, and the orthographic projection of point D on the vehicle body forms point D1. The orthographic projection of point C on the vehicle body forms point C1. The included angle between the connection line between point C1 and point D1 and the horizontal line is the roof angle γ. Among them, 0° < installation angle α ≤ roof angle γ. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0042] Figure 1 Schematic diagram of the external structure of the vehicle provided by the embodiment of the present application;

[0043] Figure 2 For Figure 1 a schematic diagram of an external structure of the luggage rack in

[0044] Figure 3 For Figure 2 a schematic cross-sectional structure diagram of the air guiding structure in

[0045] Figure 4 For Figure 2 a schematic diagram of the external structure of the luggage rack when looking down vertically in

[0046] Figure 5 For Figure 4 a schematic cross-sectional diagram of the luggage rack at A-A in

[0047] Figure 6 For Figure 1 a schematic diagram of another external structure of the luggage rack in

[0048] Figure 7 For Figure 5Partial enlarged schematic diagram at A in the [Chinese context].

[0049] Reference numerals: 1000, vehicle; 100, luggage rack; 101, cross beam; 10, flow guiding structure; 1, air outlet part; 11, first air guiding surface; 12, second air guiding surface; 13, first transition surface; 2, air inlet part; 21, third air guiding surface; 22, fourth air guiding surface; 23, fourth transition surface; 3, buffer part; 31, second transition surface; 32, third transition surface; 1A, first cross beam; 1B, second cross beam; 20, longitudinal beam; 30, frame member; 301, fixing rod; 200, vehicle body; 300, bracket. Specific embodiments

[0050] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0051] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. is based on the orientation or relative positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. Without special instructions, in the case of satisfying the relative positional relationship shown in the accompanying drawings, the above-described orientation description can be flexibly set during the actual application process.

[0052] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0053] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "communicated" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. It may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the embodiments of the present invention, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, article or device comprising such element.

[0055] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be construed as being more preferred or having more advantages than other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0056] In the description of this specification, specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner.

[0057] Roof racks are usually provided on vehicles to provide additional storage space for the vehicles, thereby improving the practicality of the vehicles.

[0058] Based on this, the present application provides a vehicle, as Figure 1 shown, Figure 1 is an external structural schematic diagram of vehicle 1000 provided by the embodiments of the present application. Vehicle 1000 includes a vehicle body and a roof rack 100, and the roof rack 100 is connected to the vehicle body.

[0059] As Figure 2 , Figure 3 shown, Figure 2 is Figure 1 an external structural schematic diagram of the roof rack 100 in Figure 3 is Figure 2 a sectional structural schematic diagram of the flow guiding structure 10 in . The roof rack 100 includes a cross beam 101, and the cross beam 101 includes a flow guiding structure 10.

[0060] Specifically, as Figure 3 shown, the flow guiding structure 10 includes an air outlet portion 1, and the air outlet portion 1 is located at one end of the flow guiding structure 10 facing the rear of the vehicle 1000. The cross section of the air outlet portion 1 gradually decreases along the first direction (the X direction shown as 3 in the figure).

[0061] Exemplarily, the first direction may be consistent with the length direction of the vehicle 1000 or may intersect with the length direction of the vehicle 1000.

[0062] With the above settings, during the driving of the vehicle 1000, since the cross-section of the air outlet part 1 gradually decreases in the first direction, the air flowing out from the air outlet part 1 will gradually converge. Compared with the side surface of the crossbeam 101 facing the rear of the vehicle 1000 being a plane, the air outlet part 1 can guide the air flowing through both sides of the flow guiding structure 10, thereby reducing the impact degree of the air on both sides of the flow guiding structure 10, reducing the generation of eddy currents, so as to reduce the magnitude of the noise when the air flows through the flow guiding structure 10 and improve the user experience of the vehicle 1000.

[0063] In some embodiments, the air outlet part 1 has a first sub-air outlet part 1 and a second sub-air outlet part 1 which are oppositely arranged.

[0064] Exemplarily, the first sub-air outlet part 1 and the second sub-air outlet part 1 are symmetrically arranged along the second direction ( Figure 3 the Y direction shown in the figure), and the second direction intersects with the first direction.

[0065] Exemplarily, as Figure 3 shown, the first sub-air outlet part 1 and the second sub-air outlet part 1 are asymmetrically arranged along the second direction.

[0066] With the above settings, since the first sub-air outlet part 1 and the second sub-air outlet part 1 are asymmetrically arranged along the second direction, the offset amount of the air flowing out from the first sub-air outlet part 1 relative to the first direction is different from the offset amount of the air flowing out from the second sub-air outlet part 1 relative to the first direction. When the air flowing out from the first sub-air outlet part 1 converges with the air flowing out from the second sub-air outlet part 1, the converged air will tilt towards the first sub-air outlet part 1 or the second sub-air outlet part 1.

[0067] In this way, compared with the first sub-air outlet part 1 and the second sub-air outlet part 1 being symmetrically arranged along the second direction, when the first sub-air outlet part 1 and the second sub-air outlet part 1 are asymmetrically arranged along the second direction, the impact between the air flowing out from the first sub-air outlet part 1 and the air flowing out from the second sub-air outlet part 1 can be further reduced, thereby further reducing the generation of eddy currents, so as to further reduce the magnitude of the noise when the air flows through the flow guiding structure 10, improve the noise reduction effect of the flow guiding structure 10, and further improve the user experience of the vehicle 1000.

[0068] In some embodiments, as Figure 3 shown, the first sub-air outlet part 1 has a first air guiding surface 11, the second sub-air outlet part 1 has a second air guiding surface 12, and the first air guiding surface 11 and the second air guiding surface 12 are oppositely arranged.

[0069] The first air guiding surface 11 includes a first air inlet end and a first air outlet end arranged along the second direction. The second air guiding surface 12 includes a second air inlet end and a second air outlet end arranged along the second direction.

[0070] In the second direction, the distance between the first air inlet end and the first air outlet end is the first vertical distance, and the distance between the second air inlet end and the second air outlet end is the second vertical distance.

[0071] In the first direction, the distance between the first air inlet end and the first air outlet end is the first front-back distance, and the distance between the second air inlet end and the second air outlet end is the second front-back distance.

[0072] In some embodiments, the first vertical distance is not equal to the second vertical distance.

[0073] Exemplarily, the first front-back distance and the second front-back distance may be equal or may not be equal.

[0074] In this way, by setting the size of the first air guiding surface 11 in the second direction and the size of the second air guiding surface 12 in the second direction to be unequal, the first sub-air outlet part 1 and the second sub-air outlet part 1 can be asymmetrically arranged in the second direction, thereby improving the noise reduction effect of the air guiding structure 10.

[0075] In other embodiments, the first front-back distance is not equal to the second front-back distance.

[0076] Exemplarily, the first vertical distance and the second vertical distance may be equal or may not be equal.

[0077] In this way, by setting the size of the first air guiding surface 11 in the second direction and the size of the second air guiding surface 12 in the second direction to be unequal, the first sub-air outlet part 1 and the second sub-air outlet part 1 can be asymmetrically arranged in the second direction, thereby improving the noise reduction effect of the air guiding structure 10.

[0078] In some embodiments, the first vertical distance is greater than the second vertical distance.

[0079] Through the above settings, during the process of air flowing through the air guiding structure 10, part of the air will flow along the first air guiding surface 11, and the other part of the air will flow along the second air guiding surface 12. Since in the second direction, the first vertical distance is greater than the second vertical distance, the offset of the air flowing out from the first air outlet end relative to the first direction is greater than the offset of the air flowing out from the second air outlet end relative to the first direction.

[0080] In this way, when the air flowing out from the first air outlet end and the air flowing out from the second air outlet end converge, the air will incline in the direction from the first air guiding surface 11 towards the second air guiding surface 12, thereby weakening the impact between the air flowing out from the first air outlet end and the air flowing out from the second air outlet end, and further reducing the generation of eddy currents, so as to reduce the noise level when the air flows through the air guiding structure 10. On this basis, in some embodiments, the ratio between the first vertical distance and the maximum dimension of the air guiding structure 10 in the second direction is greater than or equal to 0.25 and less than or equal to 0.6.

[0081] Exemplarily, the ratio between the first vertical distance and the maximum dimension of the air guiding structure 10 in the second direction can be 0.25, 0.3, 0.35, 0.4, 0.5, 0.55, 0.6, etc.

[0082] Through the above settings, when the ratio between the first vertical distance and the maximum dimension of the air guiding structure 10 in the second direction is greater than or equal to 0.25, the angle between the flow direction of the air flowing out from the first air outlet end and the second direction is relatively large, so that the setting of the second air guiding surface 12 can be facilitated, and it is ensured that the angle between the flow direction of the air flowing out from the first air outlet end and the second direction is greater than the angle between the flow direction of the air flowing out from the second air outlet end and the second direction.

[0083] At the same time, when the ratio between the first vertical distance and the maximum dimension of the air guiding structure 10 in the second direction is less than or equal to 0.6, it can be avoided that the angle between the flow direction of the air flowing out from the first air outlet end and the second direction is too large, thereby avoiding the generation of eddy currents at the second air guiding surface 12, reducing the generation of air noise, and ensuring the noise reduction function of the air guiding structure 10.

[0084] In some embodiments, the ratio between the second vertical distance and the maximum dimension of the air guiding structure 10 in the second direction is greater than or equal to 0.3 and less than or equal to 0.5.

[0085] Exemplarily, the ratio between the second vertical distance and the maximum dimension of the air guiding structure 10 in the second direction can be 0.3, 0.35, 0.4, 0.45, 0.5, etc.

[0086] Through the above settings, when the ratio between the second vertical distance and the maximum dimension of the air guiding structure 10 in the second direction is greater than or equal to 0.3, the second air guiding surface 12 can have sufficient dimensions in the second direction to avoid the generation of eddy currents at the first air guiding surface 11, thereby reducing the generation of noise when the air flows through the air guiding structure 10 and ensuring the noise reduction function of the air guiding structure 10.

[0087] Meanwhile, when the ratio between the second vertical spacing and the maximum dimension of the flow guiding structure 10 in the second direction is less than or equal to 0.5, it is possible to avoid too large an angle between the flow direction of the air flowing out from the second air outlet end and the second direction, thereby weakening the impact between the air flowing out from the first air outlet end and the air flowing out from the second air outlet end, so as to reduce the generation of noise when the air flows through the flow guiding structure 10.

[0088] In some embodiments, the first front-back spacing is greater than the second front-back spacing.

[0089] Through the above settings, during the process of the air flowing through the flow guiding structure 10, part of the air will flow along the first air guiding surface 11, and the other part of the air will flow along the second air guiding surface 12. Since, along the second direction, the first front-back spacing is greater than the second front-back spacing, the offset of the air flowing out from the first air outlet end relative to the first direction is greater than the offset of the air flowing out from the second air outlet end relative to the first direction.

[0090] In this way, when the air flowing out from the first air outlet end and the air flowing out from the second air outlet end converge, the air will tilt towards the direction where the first air guiding surface 11 faces the second air guiding surface 12, thereby weakening the impact between the air flowing out from the first air outlet end and the air flowing out from the second air outlet end, and further reducing the generation of eddy currents, so as to reduce the magnitude of the noise when the air flows through the flow guiding structure 10.

[0091] In some examples, when the first vertical spacing is greater than the second vertical spacing and the first front-back spacing is greater than the second front-back spacing, at this time, the rate of change of the flow direction of the air when flowing through the first air guiding surface 11 and the rate of change of the flow direction of the air when flowing through the second air guiding surface 12 are both slow, so that the air flowing out from the first air outlet end and the air flowing out from the second air outlet end can converge more smoothly, thereby improving the noise reduction function of the flow guiding structure 10.

[0092] On this basis, in some embodiments, the ratio between the first front-back spacing and the maximum dimension of the flow guiding structure 10 in the second direction is greater than or equal to 1 and less than or equal to 3.

[0093] Exemplarily, the ratio between the first front-back spacing and the maximum dimension of the flow guiding structure 10 in the second direction can be 1, 1.5, 2, 2.5, 3, etc.

[0094] Through the above settings, when the ratio between the first front-back spacing and the maximum dimension of the flow guiding structure 10 in the second direction is greater than or equal to 1, the first air guiding surface 11 has a sufficient dimension in the first direction, enabling the air to flow along the first air guiding surface 11, thereby guiding the air.

[0095] Meanwhile, when the ratio between the first front-to-back distance and the maximum dimension of the flow guiding structure 10 in the second direction is less than or equal to 3, the dimension of the first air guiding surface 11 in the first direction is not too large relative to the dimension of the first air guiding surface 11 in the second direction, so that the dimension of the air outlet part 1 in the first direction is not too large relative to the dimension of the air outlet part 1 in the second direction, thus facilitating the spatial arrangement of the flow guiding structure 10.

[0096] In some embodiments, the ratio between the second front-to-back distance and the maximum dimension of the flow guiding structure 10 in the second direction is greater than or equal to 0.5 and less than or equal to 2.

[0097] Exemplarily, the ratio between the second front-to-back distance and the maximum dimension of the flow guiding structure 10 in the second direction can be 0.5, 1, 1.5, 2, etc.

[0098] With the above arrangement, when the ratio between the second front-to-back distance and the maximum dimension of the flow guiding structure 10 in the second direction is greater than or equal to 0.5, the second air guiding surface 12 has sufficient dimension in the first direction, so that air can flow along the first air guiding surface 11, thereby guiding the air.

[0099] Meanwhile, when the ratio between the second front-to-back distance and the maximum dimension of the flow guiding structure 10 in the second direction is less than or equal to 2, the dimension of the second air guiding surface 12 in the first direction is not too large relative to the dimension of the second air guiding surface 12 in the second direction, so that the dimension of the air outlet part 1 in the first direction is not too large relative to the dimension of the air outlet part 1 in the second direction, thus facilitating the spatial arrangement of the flow guiding structure 10.

[0100] On this basis, in some embodiments, the ratio between the first up-and-down distance and the first front-to-back distance is greater than or equal to 0.15 and less than or equal to 0.5.

[0101] Exemplarily, the ratio between the first up-and-down distance and the first front-to-back distance can be 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, etc.

[0102] With the above arrangement, when the ratio between the first up-and-down distance and the first front-to-back distance is within the above range, air can flow smoothly along the first air guiding surface 11, and the air flowing out from the first air outlet end and the air flowing out from the second air outlet end can smoothly converge together, thereby reducing the generation of eddy currents when air flows through the flow guiding structure 10, so as to reduce the magnitude of air noise.

[0103] Exemplarily, the second air outlet end and the first air outlet end can be connected together.

[0104] Exemplarily, the second air outlet end and the first air outlet end can be arranged at intervals.

[0105] Specifically, such asFigure 3 As shown, the air outlet part 1 further includes a first transition surface 13, and the first transition surface 13 is connected between the first air outlet end and the second air outlet end.

[0106] Exemplarily, the first transition surface 13 is a plane. Specifically, the thickness direction of the first transition surface 13 may be consistent with the first direction or may not be consistent with the first direction.

[0107] Exemplarily, as Figure 3 shown, the first transition surface 13 is an arc surface. Specifically, the first transition surface 13 is tangent to the first air guiding surface 11 and tangent to the second air guiding surface 12.

[0108] Through the above settings, compared with the connection between the first air outlet end and the second air outlet end, when part of the air flowing out from the first air outlet end and part of the air flowing out from the second air outlet end will directly converge, when the air outlet part 1 further includes the first transition surface 13, part of the air flowing out from the first air outlet end and part of the air flowing out from the second air outlet end will flow along the transition surface and converge together after being buffered by the transition surface.

[0109] In this way, through the setting of the first transition surface 13, it is possible to avoid the separation of eddy currents from the air flowing out from the first air outlet end at the first air outlet end, and avoid the separation of eddy currents from the air flowing out from the second air outlet end at the second air outlet end. In this way, the magnitude of the noise when the air flows through the diversion structure 10 can be further reduced.

[0110] On this basis, in some embodiments, the ratio of the distance between the two ends of the first transition surface 13 to the maximum size of the diversion structure 10 is greater than or equal to 0.1 and less than or equal to 0.25.

[0111] Exemplarily, the ratio of the distance between the two ends of the first transition surface 13 to the maximum size of the diversion structure 10 can be 0.1, 0.15, 0.2, 0.25, etc.

[0112] Through the above settings, when the ratio of the distance between the two ends of the first transition surface 13 to the maximum size of the diversion structure 10 is greater than or equal to 0.1, at this time, there is enough distance between the first air outlet end and the second air outlet end, so that the air flowing out from the first air outlet end and the air flowing out from the second air outlet end can have the buffering effect when converging through the first transition surface 13.

[0113] At the same time, when the ratio of the distance between the two ends of the first transition surface 13 to the maximum size of the diversion structure 10 is less than or equal to 0.25, it is possible to avoid the size of the first transition surface 13 being too large, thereby avoiding the generation of eddy currents in the first transition surface 13, thereby reducing the generation of noise when the air flows through the diversion structure 10 and ensuring the noise reduction function of the diversion structure 10.

[0114] In some embodiments, the first vertical spacing is negatively correlated with the spacing between the two ends of the first transition surface 13 in the second direction.

[0115] The first front - rear spacing is negatively correlated with the spacing between the two ends of the first transition surface 13 in the second direction.

[0116] With the above - mentioned arrangement, when the spacing between the two ends of the first transition surface 13 in the second direction is large, both the first vertical spacing and the second vertical spacing are small. To ensure the air - guiding effect of the first air - guiding surface 11 and the second air - guiding surface 12, the first front - rear spacing and the second front - rear spacing will also become smaller accordingly. Thus, the first vertical spacing is negatively correlated with the spacing between the two ends of the first transition surface 13 in the second direction, and the first front - rear spacing is negatively correlated with the spacing between the two ends of the first transition surface 13 in the second direction.

[0117] Exemplarily, both the first air - guiding surface 11 and the second air - guiding surface 12 can be flat surfaces.

[0118] Exemplarily, as Figure 3 shown, the first air - guiding surface 11 is an arc - shaped surface that bulges in the direction away from the second air - guiding surface 12. The second air - guiding surface 12 is an arc - shaped surface that bulges in the direction away from the first air - guiding surface 11.

[0119] With the above - mentioned arrangement, compared with the case where both the first air - guiding surface 11 and the second air - guiding surface 12 are flat surfaces, when both the first air - guiding surface 11 and the second air - guiding surface 12 are arc - shaped surfaces, after the air flows to the first air - inlet end and the second air - inlet end, it can flow more smoothly along the first air - guiding surface 11 and the second air - guiding surface 12, and then flow out from the first air - outlet end and the second air - outlet end.

[0120] In this way, it can avoid the separation of eddy currents when the air flows along the first air - guiding surface 11 and the second air - guiding surface 12, thereby reducing the generation of air noise and improving the noise - reduction function of the air - guiding structure 10.

[0121] On this basis, in some embodiments, as Figure 3 shown, the air - guiding structure 10 further includes an air - inlet part 2, and the air - inlet part 2 is located at one end of the air - guiding structure 10 facing the front of the vehicle 1000. The cross - section of the air - inlet part 2 gradually increases along the first direction.

[0122] With the above - mentioned arrangement, during the driving of the vehicle 1000, since the cross - section of the air - inlet part 2 gradually increases along the first direction, after the air contacts the air - inlet part 2, it will flow along the air - inlet part 2 to both sides of the air - outlet part 1. Compared with the case where the side of the air - inlet part 2 far from the air - outlet part 1 is a flat surface, it can avoid the air being blocked by the air - inlet part 2 when the air blows to the air - inlet part 2, thus ensuring the noise - reduction effect of the air - guiding structure 10. At the same time, it can reduce the magnitude of the wind force received by the air - guiding structure 10 and improve the stability of the air - guiding structure 10 during use.

[0123] In some embodiments, the air inlet portion 2 has a first sub-air inlet portion 2 and a second sub-air inlet portion 2 which are oppositely arranged, and the first sub-air inlet portion 2 and the second sub-air inlet portion 2 are symmetrically arranged along the second direction.

[0124] With the above arrangement, since the first sub-air inlet portion 2 and the second sub-air inlet portion 2 are symmetrically arranged along the second direction, the rates of the air flowing to both sides of the air outlet portion 1 along the air inlet portion 2 are the same. Thus, when the rate of the air flowing along the first air guiding surface 11 is the same as the rate of the air flowing along the second air guiding surface 12.

[0125] In this way, the flow rate of the air flowing out from the first air outlet end is the same as the rate of the air flowing out from the second air outlet end. Thus, it can be ensured that after the air flowing out from the first air outlet end and the air flowing out from the second air outlet end converge, the air can be inclined in the direction from the first air guiding surface 11 towards the second air guiding surface 12, reducing the magnitude of the noise when the air flows through the guiding structure 10.

[0126] In some embodiments, as Figure 3 shown, the first sub-air inlet portion 2 has a third air guiding surface 21, the second sub-air inlet portion 2 has a fourth air guiding surface 22, and the third air guiding surface 21 and the fourth air guiding surface 22 are oppositely arranged.

[0127] The third air guiding surface 21 includes a third air inlet end and a third air outlet end arranged along the second direction. The fourth air guiding surface 22 includes a fourth air inlet end and a fourth air outlet end arranged along the second direction.

[0128] Along the second direction, the distance between the third air inlet end and the third air outlet end is the third vertical distance, and the distance between the fourth air inlet end and the fourth air outlet end is the fourth vertical distance. Along the first direction, the distance between the third air inlet end and the third air outlet end is the third front-back distance, and the distance between the fourth air inlet end and the fourth air outlet end is the fourth front-back distance.

[0129] In some embodiments, the third front-back distance is equal to the fourth front-back distance, and the third vertical distance is equal to the fourth vertical distance, so as to realize the symmetrical arrangement of the first sub-air inlet portion 2 and the second sub-air inlet portion 2.

[0130] Exemplarily, both the third air guiding surface 21 and the fourth air guiding surface 22 are planes.

[0131] Exemplarily, as Figure 3 shown, the third air guiding surface 21 is a curved surface convex in the direction away from the fourth air guiding surface 22. The fourth air guiding surface 22 is a curved surface convex in the direction away from the third air guiding surface 21.

[0132] It can be understood that the third air guiding surface 21 and the fourth air guiding surface 22 are symmetrically arranged.

[0133] With the above settings, compared to the case where both the third air guiding surface 21 and the fourth air guiding surface 22 are flat surfaces, when both the third air guiding surface 21 and the fourth air guiding surface 22 are arc surfaces, after the air flows to the third air inlet end and the fourth air inlet end, it can flow more smoothly along the third air guiding surface 21 and the fourth air guiding surface 22, and then flow out from the third air outlet end and the fourth air outlet end.

[0134] In this way, it is possible to prevent the air from separating into eddy currents when flowing along the third air guiding surface 21 and the fourth air guiding surface 22, thereby reducing the generation of air noise and improving the noise reduction function of the air guiding structure 10.

[0135] On this basis, in some embodiments, the ratio between the third front-back distance and the maximum dimension of the air guiding structure 10 in the second direction is greater than or equal to 0.8 and less than or equal to 2.5.

[0136] Exemplarily, the ratio between the third front-back distance and the maximum dimension of the air guiding structure 10 in the second direction can be 0.8, 1, 1.5, 2, 2.5, etc.

[0137] With the above settings, when the ratio between the third front-back distance and the maximum dimension of the air guiding structure 10 in the second direction is greater than or equal to 0.8, it is possible to prevent the third front-back distance of the third air guiding surface 21 from being too small, so that the air can flow more smoothly along the third air guiding surface 21 and the fourth air guiding surface 22, to ensure the air guiding effect of the third air guiding surface 21 and the fourth air guiding surface 22.

[0138] At the same time, when the ratio between the third front-back distance and the maximum dimension of the air guiding structure 10 in the second direction is less than or equal to 1, it is possible to prevent the third front-back distance of the third air guiding surface 21 from being too large, thereby reducing the magnitude of the wind force received by the air inlet part 2, ensuring the structural strength of the air guiding structure 10, and reducing the space occupied by the air inlet part 2, facilitating the spatial arrangement of the air guiding structure 10.

[0139] In some embodiments, the ratio between the third up-down distance and the maximum dimension of the air guiding structure 10 in the second direction is greater than or equal to 0.3 and less than or equal to 0.5.

[0140] With the above settings, when the ratio between the third up-down distance and the maximum dimension of the air guiding structure 10 in the second direction is greater than or equal to 0.3, the third air guiding surface 21 has sufficient dimension in the first direction, enabling the air to flow along the third air guiding surface 21, thereby guiding the air.

[0141] Meanwhile, when the ratio between the third vertical distance and the maximum dimension of the diversion structure 10 in the second direction is less than or equal to 0.5, the dimension of the third air guiding surface 21 in the first direction is not too large relative to the dimension of the third air guiding surface 21 in the second direction, so that the dimension of the air inlet part 2 in the first direction is not too large relative to the dimension of the air inlet part 2 in the second direction, thus facilitating the spatial arrangement of the diversion structure 10.

[0142] In some embodiments, the ratio of the third vertical distance to the third front-back distance is greater than or equal to 0.2 and less than or equal to 0.4.

[0143] Exemplarily, the ratio of the third vertical distance to the third front-back distance can be 0.2, 0.25, 0.3, 0.35, 0.4, etc.

[0144] With the above arrangement, when the ratio of the third vertical distance to the third front-back distance is within the above range, when air is on the vertical air inlet part 2, it can flow smoothly along the third air guiding surface 21 and the fourth air guiding surface 22, thereby reducing the generation of noise when air flows through the air inlet part 2.

[0145] Meanwhile, the dimension of the air inlet part 2 in the first direction is not too large relative to the dimension of the air inlet part 2 in the second direction, so that the structural strength of the air inlet part 2 can be guaranteed, thereby guaranteeing the structural strength of the diversion structure 10 and facilitating the spatial arrangement of the diversion structure 10.

[0146] In some examples, as Figure 3 shown, the air inlet part 2 further includes a fourth transition surface 23, and the fourth transition surface 23 is connected between the third air inlet end and the fourth air inlet end. The fourth transition surface 23 is tangent to the third air guiding surface 21 and tangent to the fourth air guiding surface 22.

[0147] With the above arrangement, compared with when the third air inlet end and the fourth air inlet end are connected, only by changing the third front-back distance to change the air guiding effect of the third air guiding surface 21, this will limit the structure of the air inlet part 2, thereby limiting the structure and spatial arrangement of the diversion structure 10.

[0148] With the arrangement of the fourth transition surface 23, the third vertical distance and the fourth vertical distance can be changed by changing the dimension of the fourth transition surface 23 in the second direction. In this way, the structure of the diversion structure 10 can be arranged more conveniently, so as to facilitate the spatial arrangement of the diversion structure 10 while ensuring the noise reduction effect of the diversion structure 10.

[0149] In some examples, the fourth transition surface 23 can be an arc surface or a flat surface.

[0150] On this basis, in some embodiments, as Figure 3As shown, the flow guiding structure 10 further includes a buffer portion 3. The buffer portion 3 is disposed between the air inlet portion 2 and the air outlet portion 1. The maximum dimension of the buffer portion 3 in the second direction is the same as the maximum dimension of the flow guiding structure 10 in the second direction.

[0151] With the above arrangement, since the maximum dimension of the buffer portion 3 in the second direction is the same as the maximum dimension of the flow guiding structure 10 in the second direction, after the air flows out from the third air outlet end and the fourth air outlet end, it will flow along the buffer portion 3 towards the direction close to the air outlet portion 1, and then flow to the first air guiding surface 11 and the second air guiding surface 12 from the first air inlet end and the second air inlet end, and flow along the first air guiding surface 11 and the second air guiding surface 12.

[0152] In this way, during the process of the air flowing from the air inlet portion 2 to the air outlet portion 1, it will flow along the buffer portion 3. Compared with the connection between the air outlet portion 1 and the air inlet portion 2, the flow direction of the air changes more slowly. In this way, the air can flow more smoothly to the air outlet portion 1, thereby further reducing the generation of noise when the air flows through the flow guiding structure 10, and thus improving the noise reduction function of the flow guiding structure 10.

[0153] In some embodiments, as Figure 3 shown, along the second direction, one side surface of the buffer portion 3 is a second transition surface 31, and the other side surface of the buffer portion 3 is a third transition surface 32;

[0154] The second transition surface 31 is connected to the first air guiding surface 11 and is also connected to the third air guiding surface 21; the third transition surface 32 is connected to the second air guiding surface 12 and is also connected to the fourth air guiding surface 22.

[0155] Exemplarily, the second transition surface 31 and the first air guiding surface 11 may be tangent or may not be tangent.

[0156] Exemplarily, the second transition surface 31 and the third air guiding surface 21 may be tangent or may not be tangent.

[0157] Exemplarily, the third transition surface 32 and the second air guiding surface 12 may be tangent or may not be tangent.

[0158] Exemplarily, the third transition surface 32 and the fourth air guiding surface 22 may be tangent or may not be tangent. With the above arrangement, since the second transition surface 31 is connected to the third air guiding surface 21, the air flowing out from the third air outlet end can directly flow to the second transition surface 31 and flow along the second transition surface 31. Since the second transition surface 31 is connected to the first air guiding surface 11, the air flowing along the second transition surface 31 can directly flow to the first air guiding surface 11 and then flow along the first air guiding surface 11.

[0159] Since the third transition surface 32 is connected to the fourth air guiding surface 22, the air flowing out from the fourth air outlet end can directly flow to the third transition surface 32 and flow along the third transition surface 32. Since the third transition surface 32 is connected to the second air guiding surface 12, the air flowing along the third transition surface 32 can directly flow to the second air guiding surface 12 and then flow along the second air guiding surface 12.

[0160] In this way, through the settings of the second transition surface 31 and the third transition surface 32, the air can flow through the guiding structure 10 more smoothly, reducing the impact and generation of eddy currents with the guiding structure 10, so as to further improve the noise reduction function of the guiding structure 10.

[0161] Exemplarily, both the second transition surface 31 and the third transition surface 32 can be arc surfaces.

[0162] Exemplarily, the second transition surface 31 is a plane and the second transition surface 31 is perpendicular to the second direction; the third transition surface 32 is a plane and the third transition surface 32 is perpendicular to the second direction.

[0163] Through the above settings, both the second transition surface 31 and the third transition surface 32 are parallel to the first direction. When the air flows along the second transition surface 31 and the third transition surface 32, it can flow along the first direction. In this way, the rate of change of the flow direction of the air when flowing through the guiding structure 10 can be further reduced, so that the air can flow through the guiding structure 10 more smoothly.

[0164] In some embodiments, as Figure 4 、 Figure 5 shown, Figure 4 is Figure 2 the external structure schematic diagram of the luggage rack 100 when looking down vertically, Figure 5 is Figure 4 the cross-sectional schematic diagram of the luggage rack 100 at A-A. There are at least two cross beams 101. The at least two cross beams 101 include a first cross beam 1A and a second cross beam 1B. The first cross beam 1A and the second cross beam 1B are arranged at intervals in the front-rear direction of the vehicle 1000. The first cross beam 1A is located at the front end of the luggage rack 100, and the second cross beam 1B is located between the front end and the rear end of the luggage rack 100.

[0165] Through the above settings, when it is necessary to place luggage or other items on the luggage rack 100, the items to be placed can be placed on the at least two cross beams 101, and the at least two cross beams 101 support the items to be placed.

[0166] During the driving of the vehicle 1000, due to the arrangement of the diversion structure 10, the noise generated when the air flows through the roof rack 100 can be reduced. Compared with setting horizontal support rods, support columns, etc. between the front end and the rear end of the roof rack 100, the noise reduction effect of the roof rack 100 can be improved.

[0167] In some embodiments, as Figure 4 , Figure 5 shown, the roof rack 100 further includes longitudinal beams 20. There are at least two longitudinal beams 20, and the at least two longitudinal beams 20 are arranged at intervals in the width direction of the vehicle 1000. The longitudinal beams 20 are connected to the cross beam 101.

[0168] Through the above arrangement, when it is necessary to place luggage or other objects on the roof rack 100, the objects to be placed can be placed on the at least two cross beams 101 and the at least two longitudinal beams 20, and the objects to be placed are supported by the at least two cross beams 101 and the at least two longitudinal beams 20, thereby improving the load-bearing capacity of the roof rack 100.

[0169] Moreover, during the driving of the vehicle 1000, when the air flows through the longitudinal beams 20, it will flow along the gaps between the multiple longitudinal beams 20. Compared with setting horizontal support rods, support columns, etc. between the first cross beam 1A and the second cross beam 1B, it can reduce the generation of noise while improving the load-bearing capacity of the roof rack 100, ensure the noise reduction effect of the roof rack 100, and thus ensure the user experience of using the vehicle 1000.

[0170] In some embodiments, as Figure 4 shown, the roof rack 100 further includes a border member 30. The border member 30 is connected to the side of the first cross beam 1A facing the rear of the vehicle 1000. The border member 30 surrounds the longitudinal beam 20 and forms a border with the first cross beam 1A.

[0171] Through the above arrangement, the first cross beam 1A and the border member 30 can form a border. The user can place luggage or other objects to be placed inside the border, and the objects to be placed are supported by the second cross beam 1B and the at least two longitudinal beams 20 arranged inside the border, so that the vehicle 1000 can carry the objects to be placed and drive.

[0172] In some other embodiments, as Figure 6 shown, Figure 6 is Figure 1 another schematic diagram of the external structure of the roof rack 100 in . The border member 30 and the cross beam 101 enclose a border. The border member 30 includes a fixed rod 301, and the fixed rod 301 is located at the rear end of the roof rack 100.

[0173] There are at least two longitudinal beams 20, and the at least two longitudinal beams 20 are arranged at intervals in the width direction of the vehicle 1000. The longitudinal beams 20 are connected between the cross beam 101 and the fixed rod 301.

[0174] With the above settings, the cross beam 101 and the frame members 30 can form a frame, and the user can place the luggage or other items to be placed within the frame, and support the items to be placed by at least two longitudinal beams 20 provided within the frame, so that the vehicle 1000 can carry the items to be placed and drive.

[0175] In some other embodiments, the frame members 30 form a frame, and the cross beam 101 is provided within the frame.

[0176] With the above settings, after the user places the luggage or other items to be placed within the frame, the items to be placed can be supported by the cross beam 101 provided within the frame, so that the vehicle 1000 can carry the items to be placed and drive.

[0177] In some examples, as Figure 2 shown, the vehicle 1000 further includes a plurality of brackets 300, and the plurality of brackets 300 are connected between the vehicle body and the frame members 30.

[0178] With the above settings, the luggage rack 100 can be installed on the vehicle body through the plurality of brackets 300, and then support the items to be placed.

[0179] In some embodiments, as Figure 5 、 Figure 7 shown, Figure 7 is Figure 5 a partial enlarged schematic view of part A in , and the luggage rack 100 is connected to the top of the vehicle body 200.

[0180] The midpoint of the connection line between the first air outlet end and the second air outlet end is point B, the midpoint of the connection line between the third air inlet end and the fourth air inlet end is point C, and the included angle between the connection line of point B and point C and the horizontal line is the installation angle α.

[0181] A preset distance e is set in the vehicle front direction from point C to set point D, and the orthographic projection of point D on the vehicle body 200 forms point D1.

[0182] The orthographic projection of point C on the vehicle body 200 forms point C1.

[0183] The included angle between the connection line of point C1 and point D1 and the horizontal line is the roof angle γ.

[0184] Wherein, 0° < installation angle α ≤ roof angle γ.

[0185] Exemplarily, the magnitude of e can be 70mm, 80m, 90mm, etc.

[0186] With the above settings, when the installation angle α is within the above range, the arrangement direction of the air inlet part 2 and the air outlet part 1 forms a relatively small angle with the flow direction of the air blowing to the air inlet part 2. In this way, the air can flow more smoothly from the air inlet part 2 to the air outlet part 1, thereby further reducing the noise generated when the air flows through the diversion structure 10 and improving the user experience of the vehicle 1000.

[0187] It can be understood that for different vehicles 1000, the roof angle γ may be different.

[0188] In some examples, when the sum of the air outlet angle β and the installation angle α of the diversion structure 10 is equal to the roof angle γ, the air will still flow in its original flow direction after passing through the diversion structure 10. In this way, the impact between the air flowing through the diversion structure 10 and the surrounding air can be reduced, thereby further improving the noise reduction effect of the diversion structure 10.

[0189] Specifically, as Figure 3 shown, let the first front-back distance be L1, the second front-back distance be L2, the first up-down distance be d1, and the second up-down distance be d2.

[0190] Let the air outlet angle of the first air guiding surface 11 be a1, and the air outlet angle of the second air guiding surface 12 be a2.

[0191] Among them, tan(a1) = d1 / L1, then a1 = arctan(d1 / L1).

[0192] tan(a2) = d2 / L2, then a2 = arctan(d2 / L2).

[0193] Along the first direction and the second direction, the velocity V1 of the air flowing out from the first air outlet end can be decomposed into a first front-back velocity Vx1 and a first up-down velocity Vy1, Vx1 = V1cosa1, Vy1 = V1sina1.

[0194] The velocity V2 of the air flowing out from the second air outlet end can be decomposed into a second front-back velocity Vx2 and a second up-down velocity Vy2, Vx2 = V2cosa2, Vy2 = V2sina2.

[0195] In this way, the velocity of the air after the air flowing out from the first air outlet end and the air flowing out from the second air outlet end converge is V3, and V3 can be decomposed into a third front-back velocity Vx3 and a third up-down velocity Vy3, Vx3 = V1cosa1 + V2cosa2, Vy3 = V1sina1 - V2sina2.

[0196] In this way, the air outlet angle β of the diversion structure 10 can be obtained, β = arctan((V1sina1 - V2sina2) / (V1cosa1 + V2cosa2)).

[0197] It can be understood that α = γ - β, that is, α = γ - arctan((V1sinα1 - V2sinα2) / (V1cosα1 + V2cosα2)).

[0198] Let the distance between point B and point B1 be h, and the distance between point D and point D1 be c. Then the roof angle γ = arctan((c - h) / e).

[0199] Then the installation angle A = arctan((c - h) / e) - arctan((V1sinα1 - V2sinα2) / (V1cosα1 + V2cosα2)) = arctan((c - h) / e) - arctan((V1sin(arctan(d1 / L1)) - V2sin(arctan(d2 / L2))) / (V1cos(arctan(d1 / L1)) + V2cos(arctan(d2 / L2)))).

[0200] On this basis, in some examples, when the third air guide surface 21 and the fourth air guide surface 22 are symmetrically arranged, the rate of the air flowing out from the first air outlet end is the same as the rate of the air flowing out from the second air outlet end. At this time, the installation angle A = arctan((c - h) / e) - arctan((sinα1 - sinα2) / (cosα1 + cosα2)) = arctan((c - h) / e) - arctan((sin(arctan(d1 / L1)) - sin(arctan(d2 / L2))) / (cos(arctan(d1 / L1)) + cos(arctan(d2 / L2)))).

[0201] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A flow guide structure, used for a crossbeam of a vehicle luggage rack, characterized in that: The air guide structure comprises an air outlet portion (1), the air outlet portion (1) being located at one end of the air guide structure facing the rear of the vehicle; the cross section of the air outlet portion (1) gradually decreases along a first direction; The air outlet portion (1) comprises a first sub-air outlet portion and a second sub-air outlet portion which are arranged opposite to each other, wherein the first sub-air outlet portion and the second sub-air outlet portion are arranged asymmetrically along a second direction, and the second direction intersects with the first direction; The first sub-air outlet portion has a first air guide surface (11), the second sub-air outlet portion has a second air guide surface (12), and the first air guide surface (11) and the second air guide surface (12) are arranged opposite to each other; The first wind guiding surface (11) comprises a first wind inlet end and a first wind outlet end arranged along the second direction, and the second wind guiding surface (12) comprises a second wind inlet end and a second wind outlet end arranged along the second direction; Along the second direction, the distance between the first air inlet end and the first air outlet end is a first up-down distance, and the distance between the second air inlet end and the second air outlet end is a second up-down distance; Along the first direction, the distance between the first air inlet end and the first air outlet end is a first front-to-back distance, and the distance between the second air inlet end and the second air outlet end is a second front-to-back distance; The first up-down distance is greater than the second up-down distance; the first front-to-back distance is greater than the second front-to-back distance; The air outlet portion (1) further comprises a first transition surface (13), wherein the first transition surface (13) is connected between the first air outlet end and the second air outlet end; The first upper-lower spacing is negatively correlated with the spacing between the two ends of the first transition surface (13) in the second direction; and the first front-to-back spacing is negatively correlated with the spacing between the two ends of the first transition surface (13) in the second direction.

2. The flow guiding structure according to claim 1, characterized in that: The first upper and lower spacing is not equal to the second upper and lower spacing; And / or, the first front-to-back distance is not equal to the second front-to-back distance.

3. The flow guiding structure according to claim 1, characterized in that: A ratio of the first upper-lower spacing to a maximum dimension of the guide structure in the second direction is greater than or equal to 0.25 and less than or equal to 0.

6.

4. The flow guiding structure according to claim 1, characterized in that: A ratio of the second upper-lower spacing to the maximum dimension of the flow guide structure in the second direction is greater than or equal to 0.3 and less than or equal to 0.

5.

5. The flow guiding structure according to claim 1, characterized in that: A ratio of the first front-to-rear spacing to a maximum dimension of the air guide structure in the second direction is greater than or equal to 1 and less than or equal to 3.

6. The flow guiding structure according to claim 1, characterized in that: A ratio of the second front-to-rear distance to a maximum dimension of the air guide structure in the second direction is greater than or equal to 0.5 and less than or equal to 2.

7. The flow guiding structure according to claim 1, characterized in that: The ratio of the first up-down spacing to the first front-back spacing is greater than or equal to 0.15 and less than or equal to 0.

4.

8. The flow guiding structure according to claim 1, characterized in that: Along the second direction, the ratio between the distance between the two ends of the first transition surface (13) and the maximum size of the flow guide structure is greater than or equal to 0.1 and less than or equal to 0.

25.

9. The flow guiding structure according to any one of claims 1 to 7, characterized in that: The first wind guide surface (11) is a curved surface that is convex in a direction opposite to the second wind guide surface (12); and the second wind guide surface (12) is a curved surface that is convex in a direction opposite to the first wind guide surface (11).

10. The flow guiding structure according to claim 1, characterized in that: Also includes: An air inlet portion (2), the air inlet portion (2) being located at one end of the air guide structure facing the front of the vehicle; the cross section of the air inlet portion (2) gradually increases along the first direction.

11. The flow guiding structure according to claim 10, characterized in that: The air inlet portion (2) comprises a first sub-air inlet portion and a second sub-air inlet portion which are arranged opposite to each other, and the first sub-air inlet portion and the second sub-air inlet portion are arranged symmetrically along the second direction.

12. The flow guiding structure according to claim 11, characterized in that: The first sub-air inlet portion has a third air guide surface (21), the second sub-air inlet portion has a fourth air guide surface (22), and the third air guide surface (21) and the fourth air guide surface (22) are arranged opposite to each other; The third wind guiding surface (21) comprises a third wind inlet end and a third wind outlet end arranged along the second direction; the fourth wind guiding surface (22) comprises a fourth wind inlet end and a fourth wind outlet end arranged along the second direction; Along the second direction, the distance between the third air inlet end and the third air outlet end is a third up-down distance, the distance between the fourth air inlet end and the fourth air outlet end is a fourth up-down distance, and the third up-down distance is equal to the fourth up-down distance; Along the first direction, the distance between the third air inlet end and the third air outlet end is the third front-to-back distance, and the distance between the fourth air inlet end and the fourth air outlet end is the fourth front-to-back distance; the third front-to-back distance is equal to the fourth front-to-back distance.

13. The flow guiding structure according to claim 12, characterized in that: A ratio of the third front-to-rear spacing to a maximum dimension of the air guide structure in the second direction is greater than or equal to 0.8 and less than or equal to 2.

5.

14. The flow guiding structure according to claim 12, characterized in that: A ratio of the third upper-lower spacing to a maximum dimension of the guide structure in the second direction is greater than or equal to 0.3 and less than or equal to 0.

5.

15. The flow guiding structure according to claim 12, characterized in that: The ratio of the third up-down spacing to the third front-back spacing is greater than or equal to 0.2 and less than or equal to 0.

4.

16. The flow guiding structure according to claim 12, characterized in that: The third wind guide surface (21) is a curved surface that is convex in a direction facing away from the fourth wind guide surface (22); and the fourth wind guide surface (22) is a curved surface that is convex in a direction facing away from the third wind guide surface (21).

17. The flow guiding structure according to claim 12, characterized in that: Also includes: A buffer portion (3), the buffer portion (3) being arranged between the air inlet portion (2) and the air outlet portion (1), the maximum dimension of the buffer portion (3) in the second direction being the maximum dimension of the air guide structure in the second direction.

18. The flow guiding structure according to claim 17, characterized in that: Along the second direction, one side surface of the buffer portion (3) is a second transition surface (31), and the other side surface of the buffer portion (3) is a third transition surface (32); The second transition surface (31) is connected to the first wind guide surface (11) and to the third wind guide surface (21); the third transition surface (32) is connected to the second wind guide surface (12) and to the fourth wind guide surface (22).

19. The flow guiding structure according to claim 18, characterized in that: The second transition surface (31) is a plane, and the second transition surface (31) is perpendicular to the second direction; the third transition surface (32) is a plane, and the third transition surface (32) is perpendicular to the second direction.

20. A luggage rack, characterized in that: include: A crossbeam (101), wherein the crossbeam (101) comprises a flow guiding structure according to any one of claims 1 to 19.

21. The luggage rack according to claim 20, characterized in that: There are at least two cross beams (101), and the at least two cross beams (101) include a first cross beam and a second cross beam, the first cross beam and the second cross beam are arranged at intervals along the front-rear direction of the vehicle, the first cross beam is located at the front end of the luggage rack, and the second cross beam is located between the front end and the rear end of the luggage rack.

22. The luggage rack according to claim 21, characterized in that: Also includes: A longitudinal beam (20), wherein there are at least two longitudinal beams (20), the at least two longitudinal beams (20) are arranged at intervals along the width direction of the vehicle, and the longitudinal beam (20) is connected to the cross beam (101).

23. The luggage rack according to claim 22, characterized in that: Also includes: A frame rod (30), the frame rod (30) being connected to a side of the first cross beam facing the rear of the vehicle; the frame rod (30) is arranged around the longitudinal beam (20) and forms a frame with the first cross beam.

24. The luggage rack according to claim 20, characterized in that: Also includes: a frame rod (30), the frame rod (30) being connected to a side of the cross beam (101) facing the rear of the vehicle; the frame rod (30) and the cross beam (101) forming a frame; the frame rod (30) comprising a fixing rod (301), the fixing rod (301) being located at the rear end of the luggage rack; A longitudinal beam (20), wherein there are at least two longitudinal beams (20), the at least two longitudinal beams (20) are arranged at intervals along the width direction of the vehicle, and the longitudinal beam (20) is connected between the cross beam (101) and the fixing rod (301).

25. The luggage rack according to claim 20, characterized in that: Also includes: A frame rod (30), wherein the frame rod (30) is formed into a frame, and the crossbeam (101) is arranged in the frame.

26. A vehicle, characterized in that: include: Car body (200); The luggage rack according to any one of claims 20 to 25, wherein the luggage rack is arranged on the vehicle body (200).

27. The vehicle according to claim 26, characterized in that The luggage rack is connected to the top of the vehicle body (200); The air outlet portion (1) comprises a first air guide surface (11) and a second air guide surface (12) which are arranged opposite to each other along a second direction; The first wind guiding surface (11) comprises a first wind inlet end and a first wind outlet end arranged along the second direction, and the second wind guiding surface (12) comprises a second wind inlet end and a second wind outlet end arranged along the second direction; The air guide structure further comprises an air inlet portion (2), wherein the air inlet portion (2) is located at one end of the air guide structure facing the front of the vehicle; The air inlet portion (2) comprises a third air guide surface (21) and a fourth air guide surface (22) which are arranged opposite to each other along the second direction; The third wind guiding surface (21) comprises a third wind inlet end and a third wind outlet end arranged along the second direction; the fourth wind guiding surface (22) comprises a fourth wind inlet end and a fourth wind outlet end arranged along the second direction; The midpoint of the line connecting the first air outlet and the second air outlet is point B, the midpoint of the line connecting the third air inlet and the fourth air inlet is point C, and the angle between the line connecting point B and point C and the horizontal line is the installation angle α; Point C is extended to the front of the vehicle by a preset distance e to form point D, and the orthographic projection of point D on the vehicle body forms point D1; The orthographic projection of point C on the vehicle body forms point C1; The angle between the line connecting point C1 and point D1 and the horizontal line is the roof angle γ; Among them, 0°<installation angle α≤roof angle γ.

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