Flow guide structure, luggage rack and vehicle

Abstract

The invention discloses a flow guide structure, a luggage rack and a vehicle, relates to the technical field of vehicles, and aims at solving the problem that noise generated when air flows through the luggage rack is large. The flow guide structure comprises an air outlet part which is located at the end, facing the rear portion of the vehicle, of the flow guide structure. The cross section of the air outlet part in the first direction is gradually reduced.

Description

Technical Field

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

[0002] The luggage rack of a vehicle is usually located on the top of the vehicle body. The luggage rack is usually composed of a frame and multiple cross bars. When the vehicle is driving, air will blow onto the luggage rack, thereby generating noise. In related technologies, the luggage rack usually does not take noise reduction measures, resulting in loud noise on the roof when the vehicle is driving, affecting the user's driving experience. Summary of the invention

[0003] The purpose of the present invention is to provide a guide structure, a luggage rack and a vehicle, aiming to solve the problem of high noise generated when air flows through the luggage rack.

[0004] In order to achieve the above object, the present invention adopts the following technical scheme: In a first aspect of the present application, a guide structure is provided for a crossbeam of a vehicle luggage rack. The guide structure includes an air outlet, which is located at one end of the guide structure facing the rear of the vehicle. The cross section of the air outlet gradually decreases along a first direction.

[0005] Through the above arrangement, since the first sub-air outlet and the second sub-air outlet are asymmetrically arranged along the second direction, the offset of the air flowing out of the first sub-air outlet relative to the first direction is different from the offset of the air flowing out of the second sub-air outlet relative to the first direction. When the air flowing out of the first sub-air outlet merges with the air flowing out of the second sub-air outlet, the merged air will tilt toward the first sub-air outlet or the second sub-air outlet.

[0006] In this way, compared with the first sub-air outlet and the second sub-air outlet being symmetrically arranged along the second direction, when the first sub-air outlet and the second sub-air outlet are asymmetrically arranged along the second direction, the impact between the air flowing out of the first sub-air outlet and the air flowing out of the second sub-air outlet can be further reduced, thereby further reducing the generation of vortices, so as to further reduce the size of the noise when the air flows through the guide structure, improve the noise reduction effect of the guide structure, and further improve the user experience of the vehicle.

[0007] In some embodiments, the air outlet portion has a first sub-air outlet portion and a second sub-air outlet portion that are arranged opposite to each other, the first sub-air outlet portion and the second sub-air outlet portion are arranged asymmetrically along the second direction, and the second direction intersects with the first direction.

[0008] In some embodiments, the first sub-air outlet has a first air guiding surface, the second sub-air outlet 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 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. Along the second direction, the distance between the first air inlet end and the first air outlet end is a first upper and lower distance, and the distance between the second air inlet end and the second air outlet end is a second upper and lower distance, wherein the first upper and lower distance is not equal to the second upper and lower distance. And / or, 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, and the first front-to-back distance is not equal to the second front-to-back distance.

[0009] In some embodiments, the first up-down spacing is greater than the second up-down spacing.

[0010] In some embodiments, a ratio of the first upper and lower spacing to the 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.

[0011] In some embodiments, a ratio of the second upper-lower spacing to the 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.

[0012] In some embodiments, the first front-to-back spacing is greater than the second front-to-back spacing.

[0013] In some embodiments, a ratio of the first front-to-rear spacing to the maximum dimension of the guide structure in the second direction is greater than or equal to 1 and less than or equal to 3.

[0014] In some embodiments, a ratio of the second front-to-rear spacing to the maximum dimension of the guide structure in the second direction is greater than or equal to 0.5 and less than or equal to 2.

[0015] In some embodiments, a 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.

[0016] In some embodiments, the air 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.

[0017] In some embodiments, along the second direction, a ratio of a distance between two ends of the first transition surface to a maximum dimension of the flow guiding structure is greater than or equal to 0.1 and less than or equal to 0.25.

[0018] In some embodiments, the first upper and lower distance is negatively correlated with the distance between two ends of the first transition surface in the second direction.

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

[0020] In some embodiments, the first wind guide surface is a curved surface that is convex in a direction facing away from the second wind guide surface. The second wind guide surface is a curved surface that is convex in a direction facing away from the first wind guide surface.

[0021] In some embodiments, the air guide structure further includes an air inlet portion, which is located at one end of the air guide structure facing the front of the vehicle. The cross section of the air inlet portion along the first direction gradually increases.

[0022] In some embodiments, the air inlet portion has 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 symmetrically arranged along the second direction.

[0023] In some embodiments, the first sub-air inlet has a third air guide surface, the second sub-air inlet has a fourth air guide surface, and the third air guide surface and the fourth air guide surface are arranged opposite to each other. The third air guide surface includes a third air inlet end and a third air outlet end arranged along the second direction. The fourth air guide surface includes a fourth air inlet end and a fourth air 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 the third upper and lower distance, the distance between the fourth air inlet end and the fourth air outlet end is the fourth upper and lower distance, and the third upper and lower distance is equal to the fourth upper and lower 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.

[0024] In some embodiments, a ratio of the third front-to-rear spacing to the 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.

[0025] In some embodiments, a ratio of the third upper-lower spacing to the 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.

[0026] In some embodiments, a 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.

[0027] In some embodiments, the third wind guide surface is a curved surface that is convex in a direction facing away from the fourth wind guide surface. The fourth wind guide surface is a curved surface that is convex in a direction facing away from the third wind guide surface.

[0028] In some embodiments, the air guide structure further includes a buffer portion, which is disposed 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 guide structure in the second direction.

[0029] In some embodiments, along the second direction, one side surface of the buffer portion is a second transition surface, and the other side surface of the buffer portion is a third transition surface.

[0030] The second transition surface is connected to the first wind guide surface and the third wind guide surface. The third transition surface is connected to the second wind guide surface and the fourth wind guide surface.

[0031] In some embodiments, the second transition surface is a plane, and the second transition surface is perpendicular to the second direction. The third transition surface is a plane, and the third transition surface is perpendicular to the second direction.

[0032] In a second aspect of the present application, a luggage rack is provided, comprising a crossbeam, wherein the crossbeam comprises the above-mentioned flow guide structure.

[0033] In some embodiments, there are at least two cross beams, including a first cross beam and a second cross beam, the first cross beam and the second cross beam are spaced apart along the front and rear directions 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.

[0034] In some embodiments, the luggage rack further includes a longitudinal beam, there are at least two longitudinal beams, the at least two longitudinal beams are arranged at intervals along the width direction of the vehicle, and the longitudinal beams are connected to the cross beam.

[0035] In some embodiments, the luggage rack further comprises a frame rod, which is connected to a side of the first cross beam facing the rear of the vehicle. The frame rod is arranged around the longitudinal beam and forms a frame with the first cross beam.

[0036] In some embodiments, the luggage rack further comprises a frame rod and a longitudinal beam. The frame rod is connected to the side of the cross beam facing the rear of the vehicle. The frame rod and the cross beam form a frame. The frame rod comprises a fixing rod, and the fixing rod is located at the rear end of the luggage rack. There are at least two longitudinal beams, and at least two longitudinal beams are arranged at intervals along the width direction of the vehicle, and the longitudinal beams are connected between the cross beam and the fixing rod.

[0037] In some embodiments, the luggage rack further includes a frame rod, the frame rod is formed into a frame, and the crossbeam is arranged in the frame.

[0038] In a third aspect of the present application, a vehicle is provided, comprising a vehicle body and the above-mentioned luggage rack, wherein the luggage rack is arranged on the vehicle body.

[0039] In some embodiments, the luggage rack is connected to the top of the vehicle body. The air outlet has a first air guide surface and a second air guide surface arranged oppositely along the second direction. The first air guide surface includes a first air inlet end and a first air outlet end arranged along the second direction, and the second air guide surface includes a second air inlet end and a second air outlet end arranged along the second direction. The air guide structure also includes an air inlet portion, which is located at one end of the air guide structure facing the front of the vehicle. The air inlet portion 2 has a third air guide surface and a fourth air guide surface arranged oppositely along the second direction. The third air guide surface includes a third air inlet end and a third air outlet end arranged along the second direction. The fourth air guide surface includes a fourth air inlet end and a fourth air outlet end arranged along the second direction. The midpoint of the line connecting the first air outlet end and the second air outlet end is point B, the midpoint of the line connecting the third air inlet end and the fourth air inlet end 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 and is provided with point D, and point D is projected on the vehicle body to form 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 A schematic diagram of the external structure of a vehicle provided in an embodiment of the present application; Figure 2 for Figure 1 A schematic diagram of an external structure of a middle luggage rack; Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the middle flow guide structure; Figure 4 for Figure 2 A schematic diagram of the external structure of the middle luggage rack when looking down in the vertical direction; Figure 5 for Figure 4 Schematic diagram of the cross section of the middle luggage rack at AA; Figure 6 for Figure 1 Another schematic diagram of the external structure of the middle luggage rack; Figure 7 for Figure 5 A local enlarged schematic diagram of point A in the middle.

[0042] Figure numerals: 1000, vehicle; 100, luggage rack; 101, crossbeam; 10, air guide structure; 1, air outlet; 11, first air guide surface; 12, second air guide surface; 13, first transition surface; 2, air inlet; 21, third air guide surface; 22, fourth air guide surface; 23, fourth transition surface; 3, buffer; 31, second transition surface; 32, third transition surface; 1A, first crossbeam; 1B, second crossbeam; 20, longitudinal beam; 30, frame rod; 301, fixing rod; 200, vehicle body; 300, bracket. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside" and the like indicate directions or positional relationships based on the directions or relative positional relationships shown in the accompanying drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. Unless otherwise specified, the above-mentioned directional description can be flexibly set in the process of actual application under the condition that the relative positional relationship shown in the accompanying drawings is satisfied.

[0045] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. It can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the embodiments of the present invention, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, article or device including the element.

[0048] 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 interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0049] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0050] Luggage racks are usually installed on vehicles to provide additional storage space for the vehicle, thereby improving the practicality of the vehicle.

[0051] Based on this, the present application provides a vehicle, such as Figure 1 As shown, Figure 1 This is a schematic diagram of the external structure of a vehicle 1000 provided in an embodiment of the present application. The vehicle 1000 includes a vehicle body and a luggage rack 100, and the luggage rack 100 is connected to the vehicle body.

[0052] like Figure 2 , Figure 3 As shown, Figure 2 for Figure 1 A schematic diagram of the external structure of the middle luggage rack 100, Figure 3 for Figure 2 A schematic cross-sectional structure diagram of the middle air guide structure 10 , the luggage rack 100 includes a cross beam 101 , and the cross beam 101 includes the air guide structure 10 .

[0053] Specifically, Figure 3 As shown, the air guide structure 10 includes an air outlet 1, which is located at one end of the air guide structure 10 facing the rear of the vehicle 1000. The cross section of the air outlet 1 along the first direction (the X direction shown in FIG. 3 ) gradually decreases.

[0054] 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 .

[0055] With the above arrangement, during the driving of the vehicle 1000, the cross section of the air outlet 1 along the first direction gradually decreases, so the air flowing out of the air outlet 1 will gradually gather together. Compared with the flat surface of the side of the beam 101 facing the rear of the vehicle 1000, the air outlet 1 can guide the air flowing through the two sides of the guide structure 10, thereby reducing the impact of the air on the two sides of the guide structure 10, reducing the generation of vortices, and reducing the noise level when the air flows through the guide structure 10, thereby improving the user experience of the vehicle 1000.

[0056] In some embodiments, the air outlet portion 1 includes a first sub-air outlet portion 1 and a second sub-air outlet portion 1 that are arranged opposite to each other.

[0057] Exemplarily, the first sub-air outlet portion 1 and the second sub-air outlet portion 1 are arranged along the second direction ( Figure 3 The second direction is symmetrically arranged with respect to the Y direction shown in FIG. 1 , and the second direction intersects with the first direction.

[0058] For example, Figure 3 As shown, the first sub-air outlet portion 1 and the second sub-air outlet portion 1 are asymmetrically arranged along the second direction.

[0059] Through the above arrangement, since the first sub-air outlet 1 and the second sub-air outlet 1 are asymmetrically arranged along the second direction, the offset of the air flowing out of the first sub-air outlet 1 relative to the first direction is different from the offset of the air flowing out of the second sub-air outlet 1 relative to the first direction. When the air flowing out of the first sub-air outlet 1 merges with the air flowing out of the second sub-air outlet 1, the merged air will tilt toward the first sub-air outlet 1 or the second sub-air outlet 1.

[0060] In this way, compared with the symmetrical arrangement of the first sub-air outlet 1 and the second sub-air outlet 1 along the second direction, when the first sub-air outlet 1 and the second sub-air outlet 1 are asymmetrically arranged along the second direction, the impact between the air flowing out of the first sub-air outlet 1 and the air flowing out of the second sub-air outlet 1 can be further reduced, thereby further reducing the generation of vortices, so as to further reduce the size of the noise when the air flows through the guide structure 10, improve the noise reduction effect of the guide structure 10, and further improve the user experience of the vehicle 1000.

[0061] In some embodiments, Figure 3 As shown, the first sub-air outlet portion 1 has a first air guiding surface 11, and the second sub-air outlet portion 1 has a second air guiding surface 12, and the first air guiding surface 11 and the second air guiding surface 12 are arranged opposite to each other.

[0062] The first wind guiding surface 11 includes a first wind inlet end and a first wind outlet end arranged along the second direction. The second wind guiding surface 12 includes a second wind inlet end and a second wind outlet end arranged along the second direction.

[0063] 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.

[0064] 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.

[0065] In some embodiments, the first up-down distance is not equal to the second up-down distance.

[0066] Exemplarily, the first front-to-back spacing and the second front-to-back spacing may be equal or unequal.

[0067] In this way, the size of the first air guide surface 11 in the second direction and the size of the second air guide surface 12 in the second direction can be set to be unequal, so that the first sub-air outlet 1 and the second sub-air outlet 1 are set asymmetrically in the second direction, thereby improving the noise reduction effect of the guide structure 10.

[0068] In other embodiments, the first front-to-back spacing is not equal to the second front-to-back spacing.

[0069] Exemplarily, the first upper and lower spacing may be equal to or different from the second upper and lower spacing.

[0070] In this way, the size of the first air guide surface 11 in the second direction and the size of the second air guide surface 12 in the second direction can be set to be unequal, so that the first sub-air outlet 1 and the second sub-air outlet 1 are set asymmetrically in the second direction, thereby improving the noise reduction effect of the guide structure 10.

[0071] In some embodiments, the first up-down spacing is greater than the second up-down spacing.

[0072] Through the above-mentioned arrangement, in the process of air flowing through the guide structure 10, part of the air will flow along the first air guide surface 11, and the other part of the air will flow along the second air guide surface 12. Since the first upper and lower spacing is greater than the second upper and lower spacing along the second direction, 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.

[0073] In this way, when the air flowing out of the first air outlet end and the air flowing out of the second air outlet end merge, the air will tilt toward the first air guide surface 11 toward the second air guide surface 12, thereby reducing the impact between the air flowing out of the first air outlet end and the air flowing out of the second air outlet end, thereby reducing the generation of vortices, so as to reduce the noise level when the air flows through the guide structure 10. On this basis, in some embodiments, the ratio of the first upper and lower spacing to the maximum dimension of the guide structure 10 in the second direction is greater than or equal to 0.25 and less than or equal to 0.6.

[0074] Exemplarily, the ratio of the first upper and lower spacing to the maximum dimension of the guide structure 10 in the second direction may be 0.25, 0.3, 0.35, 0.4, 0.5, 0.55, 0.6, etc.

[0075] Through the above-mentioned setting, when the ratio between the first upper and lower spacing and the maximum dimension of the guide 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 and the second direction is larger, which can facilitate the setting of the second air guide surface 12 and ensure that the angle between the flow direction of the air flowing out from the first air outlet and the second direction is greater than the angle between the flow direction of the air flowing out from the second air outlet and the second direction.

[0076] At the same time, when the ratio of the first upper and lower spacing to the maximum dimension of the guide structure 10 in the second direction is less than or equal to 0.6, it is possible to avoid the angle between the flow direction of the air flowing out from the first air outlet and the second direction being too large, thereby avoiding the air from generating eddies at the second air guide surface 12, thereby reducing the generation of air noise and ensuring the noise reduction function of the guide structure 10.

[0077] In some embodiments, the ratio of the second upper-lower spacing to the maximum dimension of the guide structure 10 in the second direction is greater than or equal to 0.3 and less than or equal to 0.5.

[0078] Exemplarily, the ratio of the second upper and lower spacing to the maximum dimension of the guide structure 10 in the second direction may be 0.3, 0.35, 0.4, 0.45, 0.5, etc.

[0079] Through the above-mentioned setting, when the ratio between the second upper and lower spacing and the maximum dimension of the guide structure 10 in the second direction is greater than or equal to 0.3, the second air guide surface 12 can have a sufficient dimension in the second direction to avoid the air from generating vortices at the first air guide surface 11, thereby reducing the generation of noise when the air flows through the guide structure 10, thereby ensuring the noise reduction function of the guide structure 10.

[0080] At the same time, when the ratio of the second upper and lower spacing to the maximum dimension of the guide structure 10 in the second direction is less than or equal to 0.5, it is possible to avoid the angle between the flow direction of the air flowing out of the second air outlet end and the second direction being too large, thereby reducing the impact between the air flowing out of the first air outlet end and the air flowing out of the second air outlet end, so as to reduce the generation of noise when the air flows through the guide structure 10.

[0081] In some embodiments, the first front-to-back spacing is greater than the second front-to-back spacing.

[0082] Through the above-mentioned arrangement, in the process of air flowing through the guide structure 10, part of the air will flow along the first air guide surface 11, and the other part of the air will flow along the second air guide surface 12. Since the first front-to-back spacing is greater than the second front-to-back spacing along the second direction, 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.

[0083] 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 merge, the air will tilt toward the direction of the first air guide surface 11 toward the second air guide surface 12, thereby reducing 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 then reducing the generation of vortices, so as to reduce the noise level when the air flows through the guide structure 10.

[0084] In some examples, when the first up-down spacing is greater than the second up-down spacing, and the first front-to-back spacing is greater than the second front-to-back spacing, the rate of change of flow direction when the air flows through the first air guide surface 11 and the rate of change of flow direction when the air flows through the second air guide surface 12 are both slower, 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 guide structure 10.

[0085] On this basis, in some embodiments, the ratio of the first front-to-back spacing to the maximum dimension of the air guide structure 10 in the second direction is greater than or equal to 1 and less than or equal to 3.

[0086] Exemplarily, the ratio of the first front-to-rear spacing to the maximum dimension of the air guide structure 10 in the second direction may be 1, 1.5, 2, 2.5, 3, etc.

[0087] Through the above setting, when the ratio between the first front-to-back spacing and the maximum dimension of the guide structure 10 in the second direction is greater than or equal to 1, the first wind guide surface 11 has a sufficient dimension in the first direction so that the air can flow along the first wind guide surface 11, thereby guiding the air.

[0088] At the same time, when the ratio of the first front-to-rear spacing to the maximum dimension of the air guide structure 10 in the second direction is less than or equal to 3, the dimension of the first air guide surface 11 in the first direction will not be too large relative to the dimension of the first air guide surface 11 in the second direction, so that the dimension of the air outlet 1 in the first direction will not be too large relative to the dimension of the air outlet 1 in the second direction, thereby facilitating the spatial arrangement of the air guide structure 10.

[0089] In some embodiments, a ratio of the second front-to-rear spacing to the maximum dimension of the air guide structure 10 in the second direction is greater than or equal to 0.5 and less than or equal to 2.

[0090] Exemplarily, the ratio of the second front-to-back spacing to the maximum dimension of the air guide structure 10 in the second direction may be 0.5, 1, 1.5, 2, etc.

[0091] Through the above setting, when the ratio between the second front-to-back spacing and the maximum dimension of the guide structure 10 in the second direction is greater than or equal to 0.5, the second wind guide surface 12 has a sufficient dimension in the first direction so that the air can flow along the first wind guide surface 11, thereby guiding the air.

[0092] At the same time, when the ratio of the second front-to-rear spacing to the maximum dimension of the air guide structure 10 in the second direction is less than or equal to 2, the dimension of the second air guide surface 12 in the first direction will not be too large relative to the dimension of the second air guide surface 12 in the second direction, so that the dimension of the air outlet 1 in the first direction will not be too large relative to the dimension of the air outlet 1 in the second direction, thereby facilitating the spatial arrangement of the air guide structure 10.

[0093] Based on the above, in some embodiments, 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 0.5.

[0094] Exemplarily, the ratio of the first up-down spacing to the first front-back spacing may be 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, etc.

[0095] Through the above-mentioned setting, when the ratio of the first upper and lower spacing to the first front and rear spacing is within the above-mentioned range, the air can flow smoothly along the first air guide surface 11, and the air flowing out from the first air outlet end can smoothly merge with the air flowing out from the second air outlet end, thereby reducing the generation of vortices when the air flows through the guide structure 10, thereby reducing the size of the air noise.

[0096] Exemplarily, the second air outlet end and the first air outlet end may be connected together.

[0097] Exemplarily, the second air outlet end and the first air outlet end may be spaced apart from each other.

[0098] Specifically, Figure 3 As shown, the air outlet portion 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.

[0099] 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.

[0100] For example, Figure 3 As shown, the first transition surface 13 is a curved surface. Specifically, the first transition surface 13 is tangent to the first wind guiding surface 11 and tangent to the second wind guiding surface 12 .

[0101] Through the above arrangement, compared with when the first air outlet end is connected to the second air outlet end, 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 merge, when the air outlet portion 1 also includes a 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 both flow along the transition surface and merge together after being buffered by the transition surface.

[0102] In this way, by setting the first transition surface 13, it is possible to prevent the air flowing out from the first air outlet end from separating into vortices at the first air outlet end, and to prevent the air flowing out from the second air outlet end from separating into vortices at the second air outlet end, thereby further reducing the noise level when the air flows through the guide structure 10.

[0103] 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 flow guide structure 10 is greater than or equal to 0.1 and less than or equal to 0.25.

[0104] Exemplarily, the ratio of the distance between the two ends of the first transition surface 13 to the maximum size of the flow guiding structure 10 may be 0.1, 0.15, 0.2, 0.25, etc.

[0105] Through the above-mentioned setting, when the ratio of the spacing between the two ends of the first transition surface 13 to the maximum size of the guide structure 10 is greater than or equal to 0.1, there is a sufficient distance between the first air outlet end and the second air outlet end, so that the air flowing out of the first air outlet end and the air flowing out of the second air outlet end can have a buffering effect when they merge through the first transition surface 13.

[0106] At the same time, when the ratio of the spacing between the two ends of the first transition surface 13 to the maximum size of the guide structure 10 is less than or equal to 0.25, the size of the first transition surface 13 can be avoided from being too large, thereby avoiding the air from generating vortices at the first transition surface 13, thereby reducing the noise generated when the air flows through the guide structure 10, and ensuring the noise reduction function of the guide structure 10.

[0107] In some embodiments, the first upper and lower distance is negatively correlated with the distance between two ends of the first transition surface 13 in the second direction.

[0108] The first front-to-rear distance is negatively correlated with the distance between the two ends of the first transition surface 13 in the second direction.

[0109] Through the above-mentioned arrangement, when the spacing between the two ends of the first transition surface 13 in the second direction is large, the first upper and lower spacing and the second upper and lower spacing are both small. In order to ensure the wind guiding effect of the first wind guiding surface 11 and the second wind guiding surface 12, the first front-to-back spacing and the second front-to-back spacing will also become smaller, so that the first upper and 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.

[0110] Exemplarily, the first wind guiding surface 11 and the second wind guiding surface 12 may both be planes.

[0111] For example, Figure 3 As shown, the first wind guide surface 11 is a curved surface convex in a direction facing away from the second wind guide surface 12. The second wind guide surface 12 is a curved surface convex in a direction facing away from the first wind guide surface 11.

[0112] Through the above-mentioned arrangement, compared with when the first air guide surface 11 and the second air guide surface 12 are both planes, when the first air guide surface 11 and the second air guide surface 12 are both curved surfaces, the air can flow more smoothly along the first air guide surface 11 and the second air guide surface 12 after flowing to the first air inlet end and the second air inlet end, and then flow out from the first air outlet end and the second air outlet end.

[0113] In this way, it is possible to prevent the air from separating into vortices when flowing 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 .

[0114] On this basis, in some embodiments, such as Figure 3 As shown, the air guide structure 10 further includes an air inlet 2, which is located at one end of the air guide structure 10 facing the front of the vehicle 1000. The cross section of the air inlet 2 along the first direction gradually increases.

[0115] Through the above arrangement, during the driving of the vehicle 1000, since the cross section of the air inlet 2 along the first direction gradually increases, after the air contacts the air inlet 2, it will flow along the air inlet 2 to the two sides of the air outlet 1. Compared with the side of the air inlet 2 away from the air outlet 1 being a plane, the air can be prevented from being blocked by the air inlet 2 when it blows to the air inlet 2, thereby ensuring the noise reduction effect of the guide structure 10. At the same time, the wind force received by the guide structure 10 can be reduced, and the stability of the guide structure 10 when in use can be improved.

[0116] In some embodiments, the air inlet 2 comprises a first sub-air inlet 2 and a second sub-air inlet 2 which are arranged opposite to each other, and the first sub-air inlet 2 and the second sub-air inlet 2 are symmetrically arranged along the second direction.

[0117] Through the above-mentioned arrangement, since the first sub-air inlet 2 and the second sub-air inlet 2 are symmetrically arranged along the second direction, the speed of the air flowing along the air inlet 2 to the two sides of the air outlet 1 is the same, so the speed of the air flowing along the first air guide surface 11 is also the same as the speed of the air flowing along the second air guide surface 12.

[0118] In this way, the flow rate of the air flowing out from the first air outlet end is the same as the flow rate of the air flowing out from the second air outlet end. This can ensure that after the air flowing out from the first air outlet end and the air flowing out from the second air outlet end merge, the air can tilt toward the direction of the first air guide surface 11 toward the second air guide surface 12, thereby reducing the noise level when the air flows through the guide structure 10.

[0119] In some embodiments, Figure 3 As shown, the first sub-air inlet portion 2 has a third air guiding surface 21, and 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 arranged opposite to each other.

[0120] The third wind guiding surface 21 includes a third wind inlet end and a third wind outlet end arranged along the second direction. The fourth wind guiding surface 22 includes a fourth wind inlet end and a fourth wind outlet end arranged along the second direction.

[0121] Along the second direction, the distance between the third air inlet end and the third air outlet end is the third up-down distance, and the distance between the fourth air inlet end and the fourth air outlet end is 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.

[0122] In some embodiments, the third front-to-rear spacing is equal to the fourth front-to-rear spacing, and the third up-down spacing is equal to the fourth up-down spacing, so as to achieve a symmetrical arrangement of the first sub-air inlet 2 and the second sub-air inlet 2 .

[0123] Exemplarily, the third wind guiding surface 21 and the fourth wind guiding surface 22 are both planes.

[0124] For example, Figure 3 As shown, the third wind guide surface 21 is a curved surface convex in a direction facing away from the fourth wind guide surface 22. The fourth wind guide surface 22 is a curved surface convex in a direction facing away from the third wind guide surface 21.

[0125] It can be understood that the third wind guiding surface 21 and the fourth wind guiding surface 22 are symmetrically arranged.

[0126] Through the above-mentioned arrangement, compared with when the third air guide surface 21 and the fourth air guide surface 22 are both planes, when the third air guide surface 21 and the fourth air guide surface 22 are both curved surfaces, the air can flow more smoothly along the third air guide surface 21 and the fourth air guide surface 22 after flowing to the third air inlet end and the fourth air inlet end, and then flow out from the third air outlet end and the fourth air outlet end.

[0127] In this way, it is possible to prevent the air from separating into vortices 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 .

[0128] On this basis, in some embodiments, the ratio of the third front-to-rear spacing to the maximum dimension of the air guide structure 10 in the second direction is greater than or equal to 0.8 and less than or equal to 2.5.

[0129] Exemplarily, the ratio of the third front-to-rear spacing to the maximum dimension of the air guide structure 10 in the second direction may be 0.8, 1, 1.5, 2, 2.5, etc.

[0130] Through the above-mentioned setting, when the ratio between the third front-to-back spacing and the maximum dimension of the guide structure 10 in the second direction is greater than or equal to 0.8, the third front-to-back spacing of the third air guide surface 21 can be avoided from being too small, so that the air can flow more smoothly along the third air guide surface 21 and the fourth air guide surface 22 to ensure the air guiding effect of the third air guide surface 21 and the fourth air guide surface 22.

[0131] At the same time, when the ratio of the third front-to-back spacing to the maximum dimension of the air guide structure 10 in the second direction is less than or equal to 1, the third front-to-back spacing of the third air guide surface 21 can be prevented from being too large, thereby reducing the magnitude of the wind force received by the air inlet 2, ensuring the structural strength of the air guide structure 10, and reducing the space occupied by the air inlet 2, thereby facilitating the spatial setting of the air guide structure 10.

[0132] In some embodiments, the ratio of the third upper-lower spacing to the maximum dimension of the guide structure 10 in the second direction is greater than or equal to 0.3 and less than or equal to 0.5.

[0133] Through the above setting, when the ratio between the third upper and lower spacing and the maximum dimension of the guide structure 10 in the second direction is greater than or equal to 0.3, the third wind guide surface 21 has a sufficient size in the first direction so that the air can flow along the third wind guide surface 21, thereby guiding the air.

[0134] At the same time, when the ratio between the third upper and lower spacing and the maximum dimension of the guide structure 10 in the second direction is less than or equal to 0.5, the dimension of the third wind guide surface 21 in the first direction will not be too large relative to the dimension of the third wind guide surface 21 in the second direction, so that the dimension of the air inlet 2 in the first direction will not be too large relative to the dimension of the air inlet 2 in the second direction, thereby facilitating the spatial setting of the guide structure 10.

[0135] In some embodiments, a 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.

[0136] Exemplarily, the ratio of the third up-down spacing to the third front-back spacing may be 0.2, 0.25, 0.3, 0.35, 0.4, etc.

[0137] Through the above-mentioned setting, when the ratio of the third upper and lower spacing to the third front and rear spacing is within the above-mentioned range, the air can flow more smoothly along the third air guide surface 21 and the fourth air guide surface 22 when on the vertical air inlet 2, thereby reducing the generation of noise when the air flows through the air inlet 2.

[0138] At the same time, the size of the air inlet 2 in the first direction will not be too large relative to the size of the air inlet 2 in the second direction, which can ensure the structural strength of the air inlet 2, thereby ensuring the structural strength of the guide structure 10 and facilitating the spatial arrangement of the guide structure 10.

[0139] In some examples, such as Figure 3 As shown, the air inlet portion 2 further includes a fourth transition surface 23 , which 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 guide surface 21 and tangent to the fourth air guide surface 22 .

[0140] Through the above arrangement, compared with when the third air inlet end and the fourth air inlet end are connected, the wind guiding effect of the third air guiding surface 21 can only be changed by changing the third front-to-rear distance, which will limit the structure of the air inlet part 2, thereby limiting the structure and spatial arrangement of the guide structure 10.

[0141] By setting the fourth transition surface 23, the third upper and lower spacing and the fourth upper and lower spacing can be changed by changing the size of the fourth transition surface 23 in the second direction, so that the structure of the guide structure 10 can be set more conveniently, thereby facilitating the spatial setting of the guide structure 10 while ensuring the noise reduction effect of the guide structure 10.

[0142] In some examples, the fourth transition surface 23 may be a curved surface or a flat surface.

[0143] On this basis, in some embodiments, such as Figure 3As shown, the air guide structure 10 further includes a buffer portion 3, which is disposed between the air inlet portion 2 and the air outlet portion 1, and the maximum dimension of the buffer portion 3 in the second direction is the maximum dimension of the air guide structure 10 in the second direction.

[0144] Through the above-mentioned arrangement, since the maximum dimension of the buffer portion 3 in the second direction is the maximum dimension of the guide 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 toward the direction close to the air outlet portion 1, and then flow from the first air inlet end and the second air inlet end to the first air guide surface 11 and the second air guide surface 12, and flow along the first air guide surface 11 and the second air guide surface 12.

[0145] In this way, when the air flows from the air inlet 2 to the air outlet 1, it will flow along the buffer portion 3. Compared with the connection between the air outlet 1 and the air inlet 2, the air flow direction changes more slowly, so that the air can flow more smoothly to the air outlet 1, thereby further reducing the noise generated when the air flows through the guide structure 10, thereby improving the noise reduction function of the guide structure 10.

[0146] In some embodiments, Figure 3 As 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; The second transition surface 31 is connected to the first wind guiding surface 11 and the third wind guiding surface 21 ; the third transition surface 32 is connected to the second wind guiding surface 12 and the fourth wind guiding surface 22 .

[0147] Exemplarily, the second transition surface 31 may be tangent to the first wind guiding surface 11 or may not be tangent to the first wind guiding surface 11 .

[0148] Exemplarily, the second transition surface 31 and the third wind guiding surface 21 may be tangent to each other or may not be tangent to each other.

[0149] Exemplarily, the third transition surface 32 may be tangent to the second wind guiding surface 12 or may not be tangent to the second wind guiding surface 12 .

[0150] Exemplarily, the third transition surface 32 may be tangent to or not tangent to the fourth wind guide surface 22. Through the above arrangement, since the second transition surface 31 is connected to the third wind guide surface 21, the air flowing out from the third air outlet can flow directly 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 wind guide surface 11, the air flowing along the second transition surface 31 can flow directly to the first wind guide surface 11 and then flow along the first wind guide surface 11.

[0151] Since the third transition surface 32 is connected to the fourth wind guide surface 22, the air flowing out from the fourth air outlet 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 wind guide surface 12, the air flowing along the third transition surface 32 can directly flow to the second wind guide surface 12 and then flow along the second wind guide surface 12.

[0152] In this way, through the arrangement of the second transition surface 31 and the third transition surface 32 , air can flow through the air guide structure 10 more smoothly, reducing the impact with the air guide structure 10 and the generation of eddies, so as to further improve the noise reduction function of the air guide structure 10 .

[0153] Exemplarily, the second transition surface 31 and the third transition surface 32 may both be arc surfaces.

[0154] 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.

[0155] Through the above-mentioned setting, the second transition surface 31 and the third transition surface 32 are both 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. This can further reduce the change rate of the flow direction when the air flows through the guide structure 10, so that the air can flow through the guide structure 10 more smoothly.

[0156] In some embodiments, Figure 4 , Figure 5 As shown, Figure 4 for Figure 2 A schematic diagram of the external structure of the middle luggage rack 100 when viewed vertically downward, Figure 5 for Figure 4 A schematic cross-sectional view of the middle luggage rack 100 at AA, wherein there are at least two cross beams 101, including a first cross beam 1A and a second cross beam 1B, wherein the first cross beam 1A and the second cross beam 1B are spaced apart from each other along 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.

[0157] Through the above arrangement, when luggage needs to be placed on the luggage rack 100 and objects to be placed are needed, the objects to be placed can be placed on at least two crossbeams 101 , and the objects to be placed are supported by the at least two crossbeams 101 .

[0158] Furthermore, during the driving of the vehicle 1000, the setting of the guide structure 10 can reduce the noise generated when the air flows through the luggage rack 100. Compared with setting a transverse support rod, support column, etc. between the front end and the rear end of the luggage rack 100, the noise reduction effect of the luggage rack 100 can be improved.

[0159] In some embodiments, Figure 4 , Figure 5 As shown, the luggage rack 100 further includes a longitudinal beam 20 , and 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 1000 , and the longitudinal beams 20 are connected to the cross beam 101 .

[0160] Through the above arrangement, when luggage or other objects need to be placed on the luggage rack 100, the objects can be placed on at least two cross beams 101 and at least two longitudinal beams 20, and the objects can be supported by at least two cross beams 101 and at least two longitudinal beams 20, thereby improving the carrying capacity of the luggage rack 100.

[0161] Moreover, when the vehicle 1000 is traveling, when the air flows through the longitudinal beams 20, it will flow along the gaps between the plurality of longitudinal beams 20. Compared with setting a transverse support rod, a support column, etc. between the first cross beam 1A and the second cross beam 1B, it is possible to reduce the noise generation while improving the carrying capacity of the luggage rack 100, thereby ensuring the noise reduction effect of the luggage rack 100 and thus ensuring the user experience of the vehicle 1000.

[0162] In some embodiments, Figure 4 As shown, the luggage rack 100 further includes a frame bar 30, which is connected to a side of the first cross beam 1A facing the rear of the vehicle 1000. The frame bar 30 is disposed around the longitudinal beam 20 and forms a frame with the first cross beam 1A.

[0163] Through the above arrangement, the first cross beam 1A and the frame rod 30 can form a frame, and the user can place luggage to be placed in the frame. The second cross beam 1B and at least two longitudinal beams 20 arranged in the frame support the objects to be placed, so that the vehicle 1000 can travel with the objects to be placed.

[0164] In other embodiments, Figure 6 As shown, Figure 6 for Figure 1 Another schematic diagram of the external structure of the luggage rack 100 is shown, in which the frame rod 30 and the crossbeam 101 form a frame. The frame rod 30 includes a fixing rod 301, and the fixing rod 301 is located at the rear end of the luggage rack 100.

[0165] There are at least two longitudinal beams 20 , which are spaced apart from each other in the width direction of the vehicle 1000 . The longitudinal beams 20 are connected between the cross beam 101 and the fixing rod 301 .

[0166] Through the above arrangement, the cross beam 101 and the frame rod 30 can form a frame, and the user can place the luggage to be placed in the frame, and the objects to be placed are supported by at least two longitudinal beams 20 arranged in the frame, so that the vehicle 1000 can travel with the objects to be placed.

[0167] In other embodiments, the frame rod 30 is formed as a frame, and the crossbeam 101 is disposed in the frame.

[0168] Through the above arrangement, after the user places the luggage to be placed in the frame, the crossbeam 101 arranged in the frame can support the objects to be placed, so that the vehicle 1000 can travel with the objects to be placed.

[0169] In some examples, such as Figure 2 As 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 rod 30 .

[0170] Through the above arrangement, the luggage rack 100 can be installed on the vehicle body through a plurality of brackets 300 to support the objects to be placed.

[0171] In some embodiments, Figure 5 , Figure 7 As shown, Figure 7 for Figure 5 In the partially enlarged schematic diagram at point A, the luggage rack 100 is connected to the top of the vehicle body 200.

[0172] 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.

[0173] Point C is extended to point D by a preset distance e in the front direction of the vehicle, and the orthographic projection of point D on the vehicle body 200 forms point D1.

[0174] The orthographic projection of point C on the vehicle body 200 forms point C1.

[0175] The angle between the line connecting point C1 and point D1 and the horizontal line is the roof angle γ.

[0176] Among them, 0°<installation angle α≤roof angle γ.

[0177] Exemplarily, the size of e can be 70mm, 80m, 90mm, etc.

[0178] Through the above-mentioned setting, when the installation angle α is within the above-mentioned range, the angle between the arrangement direction of the air inlet 2 and the air outlet 1 and the flow direction of the air blown to the air inlet 2 is smaller, so that the air can flow more smoothly from the air inlet 2 to the air outlet 1, thereby further reducing the noise generated when the air flows through the guide structure 10, thereby improving the user experience of the vehicle 1000.

[0179] It can be understood that for different vehicles 1000 , the roof angle γ may be different.

[0180] In some examples, when the sum of the outlet angle β and the installation angle α of the guide structure 10 is equal to the roof angle γ, the air will still maintain its original flow direction after passing through the guide structure 10, thereby reducing the impact between the air flowing through the guide structure 10 and the surrounding air, thereby further improving the noise reduction effect of the guide structure 10.

[0181] Specifically, Figure 3 As shown, let the first front-to-back distance be L1, the second front-to-back distance be L2, the first up-down distance be d1, and the second up-down distance be d2.

[0182] Assume that the outlet angle of the first wind guide surface 11 is a1, and the outlet angle of the second wind guide surface 12 is a2.

[0183] Among them, tan(a1)=d1 / L1, then a1=arctan(d1 / L1).

[0184] tan(a2)=d2 / L2, then a2=arctan(d2 / L2).

[0185] Along the first direction and the second direction, the velocity V1 of the air flowing out from the first air outlet can be decomposed into a first front-to-back velocity Vx1 and a first up-and-down velocity Vy1, Vx1=V1cosa1, Vy1=V1sina1.

[0186] The velocity V2 of the air flowing out from the second air outlet can be decomposed into a second front-to-back velocity Vx2 and a second up-and-down velocity Vy2, Vx2=V2cosa2, Vy2=V2sina2.

[0187] In this way, the speed of the air flowing out from the first air outlet end and the air flowing out from the second air outlet end after merging is V3, and V3 can be decomposed into a third front-to-back speed Vx3 and a third up-and-down speed Vy3, Vx3=V1cosa1+V2cosa2, Vy3=V1sina1-V2sina2.

[0188] In this way, the outlet angle β of the air guide structure 10 can be obtained, β=arctan((V1sina1-V2sina2) / (V1cosa1+V2cosa2)).

[0189] It can be understood that α=γ-β, that is, α=γ-arctan((V1sina1-V2sina2) / (V1cosa1+V2cosa2)).

[0190] Assume that the distance between point B and point B1 is h, and the distance between point D and point D1 is c, then the roof angle γ = arctan ((ch) / e).

[0191] Then the installation angle A = arctan((ch) / e)-arctan((V1sina1-V2sina2) / (V1cosa1+V2cosa2))=arctan((ch) / e)-arctan((V1sin(arctan(d1 / L1))-V2sin(arctan(d2 / L2))) / (V1cos(arctan(d1 / L1))+V2cos(arctan(d2 / L2)))).

[0192] 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 air flowing out from the first air outlet end is the same as the rate of air flowing out from the second air outlet end. At this time, the installation angle A=arctan((ch) / e)-arctan((sina1-sina2) / (cosa1+cosa2))=arctan((ch) / e)-arctan((sin(arctan(d1 / L1))-sin(arctan(d2 / L2))) / (cos(arctan(d1 / L1))+cos(arctan(d2 / L2)))).

[0193] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on 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), wherein the air outlet portion (1) is 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.

2. The flow guiding structure according to claim 1, characterized in that: 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.

3. The flow guiding structure according to claim 2, characterized in that: 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, wherein the first up-down distance is not equal to the second up-down distance; And / or, 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, the distance between the second air inlet end and the second air outlet end is a second front-to-back distance, and the first front-to-back distance is not equal to the second front-to-back distance.

4. The flow guiding structure according to claim 3, characterized in that: The first upper and lower distance is greater than the second upper and lower distance.

5. The flow guiding structure according to claim 4, characterized in that: A ratio of the first upper-lower spacing to a maximum dimension of the flow guide structure in the second direction is greater than or equal to 0.25 and less than or equal to 0.

6.

6. The flow guiding structure according to claim 4, characterized in that: A ratio of the second upper-lower spacing to a 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.

7. The flow guiding structure according to claim 3, characterized in that: The first front-to-back distance is greater than the second front-to-back distance.

8. The flow guiding structure according to claim 7, 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.

9. The flow guiding structure according to claim 7, 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.

10. The flow guiding structure according to claim 3, 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.

11. The flow guiding structure according to any one of claims 3 to 10, characterized in that: 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.

12. The flow guiding structure according to claim 11, 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.

13. The flow guiding structure according to claim 11, characterized in that: The first upper and lower spacing is negatively correlated with the spacing between the two ends of the first transition surface (13) in the second direction.

14. The flow guiding structure according to claim 11, characterized in that: The first front-to-back distance is negatively correlated with the distance between the two ends of the first transition surface (13) in the second direction.

15. The flow guiding structure according to any one of claims 3 to 10, 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).

16. The flow guiding structure according to claim 3, 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.

17. The flow guiding structure according to claim 16, 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.

18. The flow guiding structure according to claim 17, 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.

19. The flow guiding structure according to claim 18, 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.

20. The flow guiding structure according to claim 18, 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.

21. The flow guiding structure according to claim 18, 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.

22. The flow guiding structure according to claim 18, 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).

23. The flow guiding structure according to claim 18, 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.

24. The flow guiding structure according to claim 23, 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).

25. The flow guiding structure according to claim 24, 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.

26. A luggage rack, characterized in that: include: A crossbeam (101), wherein the crossbeam (101) comprises the flow-guiding structure according to any one of claims 1 to 25.

27. The luggage rack according to claim 26, 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.

28. The luggage rack according to claim 27, 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).

29. The luggage rack according to claim 28, 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.

30. The luggage rack according to claim 26, 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).

31. The luggage rack according to claim 26, 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.

32. A vehicle, characterized in that: include: Car body (200); The luggage rack according to any one of claims 26 to 31, wherein the luggage rack is arranged on the vehicle body (200).

33. The vehicle according to claim 32, 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.

Images