High-position air inlet channel and vehicle

Abstract

The high-position air inlet channel comprises an air inlet channel shell, an air inlet and an air outlet are formed in the air inlet channel shell, the air inlet and the air outlet are communicated to form an airflow channel, and the air inlet and the air outlet face different directions; the channel structure comprises a first-section channel close to the air inlet and a rear-section channel close to the air outlet, the air inlet is formed in one end of the first-section channel, the other end of the first-section channel is communicated with one end of the rear-section channel, the air outlet is formed in the other end of the rear-section channel, and the first-section channel is divided into a plurality of side-by-side channels in the airflow circulation direction; wherein the plurality of channels are suitable for generating reflected sound waves to counteract sound waves transmitted from the rear-section channel to the first-section channel. By the adoption of the high-position air inlet channel, the silencing function of the air inlet of the high-position air inlet channel can be achieved, weight cost increase caused by an external connection structure can be reduced, and the high-position air inlet channel is more attractive.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a high-position air intake duct and a vehicle. Background Art

[0002] The air intake assembly is an important component of the air intake system of a vehicle, such as a truck. It is responsible for guiding the air intake, pre-filtering dust and moisture, and providing relatively clean air for the air assembly. It also reduces the air intake noise.

[0003] In the prior art, the intake noise of the high-position air intake exceeds the standard when the vehicle is idling, and the internal structure of the high-position air intake is a large overall cavity with low intake resistance, which does not contribute much to the intake transmission loss. In addition, in the past, the silencer of the vehicle intake system mostly used an external structure to achieve the silencer effect, but the method of designing an external structure to reduce noise will increase the weight and cost of the high-position air intake, affecting the overall layout and aesthetics of the high-position air intake. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to propose a high-position air intake duct, which can achieve the muffler function of the air inlet of the high-position air intake duct by changing the internal structure of the air flow channel, and can also save the increase in weight cost caused by the external structure, without affecting the layout and increasing the aesthetics of the high-position air intake duct.

[0005] A second object of the present invention is to provide a vehicle.

[0006] In order to achieve the above-mentioned purpose, the first aspect of the embodiment of the utility model provides a high-position air inlet, including: an air inlet shell, on which an air inlet and an air outlet are arranged, the air inlet and the air outlet are connected to form an air flow channel, and the air inlet and the air outlet face in different directions; the air flow channel includes a first section channel close to the air inlet and a rear section channel close to the air outlet, one end of the first section channel forms the air inlet, the other end of the first section channel is connected to one end of the rear section channel, the other end of the rear section channel forms the air outlet, and the first section channel is divided into a plurality of side-by-side channels along the air flow direction; wherein the plurality of channels are suitable for generating reflected sound waves to offset the sound waves transmitted from the rear section channel to the first section channel.

[0007] According to the high-position air inlet duct proposed in the embodiment of the utility model, by improving the main body structure of the high-position air inlet duct, the first section channel is divided into multiple side-by-side channels along the airflow flow direction, and the multiple channels can generate reflected sound waves according to the sound waves transmitted from the rear section channel to the first section channel to offset the sound waves transmitted from the rear section channel to the first section channel, thereby reducing the noise at the air inlet of the high-position air inlet duct, and the sound elimination function of the main body of the high-position air inlet duct can be achieved by changing the internal structural space of the airflow channel, which can avoid the problems of space tightness and difficult layout caused by the use of an external structure, and can also save the increase in weight cost caused by the external structure. By reasonably designing the overall shape of the high-position air inlet duct, both the sound elimination effect and the aesthetics of the high-position air inlet duct are guaranteed.

[0008] In some embodiments, the plurality of channels includes a first channel, a second channel, and a third channel.

[0009] In some embodiments, a first dividing rib is disposed between the first channel and the second channel to separate them from each other, and a second dividing rib is disposed between the second channel and the third channel to separate them from each other.

[0010] In some embodiments, the air inlet housing, the first dividing rib, and the second dividing rib are integrally formed together.

[0011] In some embodiments, the centerline length of the first dividing rib is 200 mm to 300 mm, and the centerline length of the second dividing rib is 700 mm to 800 mm.

[0012] In some embodiments, a dust and water discharge valve is provided, which is adjacent to the air outlet and communicated with the air flow channel, and is used to discharge impurities in the air flow channel.

[0013] In some embodiments, a reinforcement groove is configured on the outer surface of the air inlet housing, and the reinforcement groove is located on a side of the air inlet housing adjacent to the air outlet, and a reinforcement protrusion is configured on the inner surface of the air inlet housing at a position corresponding to the reinforcement groove.

[0014] In some embodiments, the cross-sectional area of ​​the first channel at one end of the first channel is 0.03㎡~0.04㎡, and the cross-sectional area of ​​the first channel at the other end of the first channel is 0.015㎡~0.017㎡; the cross-sectional area of ​​the second channel at one end of the first channel is 0.04㎡~0.05㎡, and the cross-sectional area of ​​the second channel at the other end of the first channel is 0.017㎡~0.019㎡; the cross-sectional area of ​​the third channel at one end of the first channel is 0.03㎡~0.04㎡, and the cross-sectional area of ​​the third channel at the other end of the first channel is 0.014㎡~0.015㎡.

[0015] In some embodiments, the thickness of the air inlet shell is 3mm~4mm, the width of the air inlet along the first direction is 120mm~130mm, and the height of the air inlet along the second direction perpendicular to the first direction is 820mm~830mm; the cross-sectional area of ​​the air inlet is 0.10㎡~0.11㎡, and the cross-sectional area of ​​the air outlet is not greater than 0.1㎡.

[0016] In order to achieve the above-mentioned purpose, a second aspect of the present utility model provides a vehicle, comprising a vehicle body and the high-position air intake duct described in the above-mentioned embodiment, wherein the high-position air intake duct is arranged on the vehicle body.

[0017] According to the vehicle of the embodiment of the utility model, by improving the structure of the high-position air intake duct body within the existing vehicle boundaries, there is no need to increase the cost of the vehicle and the noise at the air inlet of the high-position air intake duct can be reduced, thereby realizing the silencing function of the high-position air intake duct, enhancing the silencing performance of the entire vehicle and improving the driving experience of the user.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a cross-sectional view of a high-position air intake duct according to an embodiment of the utility model;

[0021] Figure 2 A graph showing the relationship between engine order frequency and decibel according to an embodiment of the utility model;

[0022] Figure 3 A schematic diagram of the transmission loss of the expansion cavity according to an embodiment of the utility model;

[0023] Figure 4 A side view of a high-position air intake duct according to an embodiment of the utility model;

[0024] Figure 5 The block diagram of a vehicle according to an embodiment of the present utility model.

[0025] Reference numerals:

[0026] Vehicles 1000;

[0027] High-position air intake 10; vehicle body 20;

[0028] Inlet housing 1, air inlet 2, air outlet 3, first section channel 4, rear section channel 5, first dividing rib 6, second dividing rib 7, dust and water discharge valve 8, and reinforcement protrusion 9;

[0029] The air intake grille 21, the first channel 41, the second channel 42, and the third channel 43;

[0030] Grid plate 211 and connecting plate 212. DETAILED DESCRIPTION

[0031] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0032] In the prior art, for the sake of waterproof structure and intake resistance, the internal cavity of the high-position intake duct is usually designed to be an inverted U-shaped structure. The airflow channel of this structure is relatively smooth, but the disadvantage of this structural design is that the intake transmission loss is small and the intake noise cannot be eliminated, resulting in a large intake noise at the high-position intake duct. The intake aerodynamic noise is the main noise source of the intake system. The noise generated by the engine can be understood according to formula (1-1), where f1 is the frequency of the intake aerodynamic noise, n is the engine speed, z is the number of engine cylinders, i is the stroke coefficient of the engine, for example, the stroke coefficient of a four-stroke engine is 2, and k is the harmonic number, which is the order.

[0033] Formula (1-1)

[0034] For example, the engine idle speed n matched by the present application is 550rpm. In this case, the transmission loss values ​​of the intake system at multiple frequency orders of the engine are slightly lower. The purpose of the present application is to improve the noise at the air inlet of the high-position intake duct by improving the main structure of the high-position intake duct, thereby eliminating the noise in most frequency bands.

[0035] In some embodiments of the present invention, Figure 1 It is a cross-sectional view of a high-position air intake duct according to an embodiment of the utility model, wherein the high-position air intake duct 10 includes an air intake duct housing 1 .

[0036] like Figure 1 As shown, the air inlet 2 and the air outlet 3 are provided on the air inlet housing 1, and the air inlet 2 and the air outlet 3 are connected to form an air flow channel, wherein Figure 1The air flow channel is not shown in the figure. The air inlet 2 and the air outlet 3 face different directions. Considering the waterproofness of the air inlet housing 1 and the air flow channel and the air inlet resistance, the air inlet 2 and the air outlet 3 can be arranged in a perpendicular direction to each other in the embodiment of the utility model. Then the air inlet 2 and the air outlet 3 are connected to form an "L"-shaped air flow channel. The gas flow resistance in the air flow channel of this shape is small and more unobstructed. Then there is a corner on the air inlet housing 1.

[0037] In some embodiments of the present invention, the thickness of the air inlet housing 1 can be set to 3mm~4mm, the width of the air inlet 2 along the first direction can be set to 120mm~130mm, and the height of the air inlet 2 along the second direction perpendicular to the first direction can be set to 820mm~830mm; the cross-sectional area of ​​the air inlet 2 is 0.10㎡~0.11㎡, and the cross-sectional area of ​​the air outlet 3 is not greater than 0.1㎡. Among them, the thickness of the air inlet housing 1, the width of the air inlet 2 along the first direction, the height of the air inlet 2 along the second direction, the cross-sectional area of ​​the air inlet 2, and the cross-sectional area of ​​the air outlet 3 are not specifically limited here. For example, in the embodiment of the present invention, the thickness of the air inlet housing 1 can be set to 3.5mm.

[0038] Furthermore, the shape of the air inlet 2 can be an ellipse or a rounded rectangle, etc., and the shape of the air outlet 3 can be an ellipse or a circle, etc., a rounded rectangle or a circle, etc. Taking the shape of the air inlet 2 as a rounded rectangle and the shape of the air outlet 3 as an ellipse as an example, the width of the air inlet 2 can be set to 128 mm and the height to 829 mm, the cross-sectional area of ​​the air inlet 2 can be 0.106 m2, and the cross-sectional area of ​​the air outlet 3 can be set to 0.033 m2.

[0039] In some embodiments, the channel structure of the airflow channel includes a first section channel 4 close to the air inlet and a rear section channel 5 close to the air outlet, one end of the first section channel 4 forms an air inlet 2, and the other end is connected to one end of the rear section channel 5, and the other end of the rear section channel 5 forms an air outlet 3, and the first section channel 4 is divided into multiple side-by-side channels along the airflow direction, wherein the multiple channels are suitable for generating reflected sound waves to offset the sound waves transmitted from the rear section channel 5 to the first section channel 4.

[0040] Specifically, the noise propagates in the opposite direction of the airflow flow direction, and the cross-sectional area of ​​multiple channels along the direction of the air outlet 3 toward the direction of the air inlet 2 gradually increases along the noise propagation direction, and the cross-sectional area mutation occurs at the other end of the first section channel 4 in the airflow channel, that is, the junction of the rear section channel 5 and the first section channel 4. During the transmission of the sound wave in the airflow channel 5, the moment when the sound wave passes through the junction of the rear section channel 5 and the first section channel 4, the cross-sectional area mutation in the airflow channel will cause the acoustic impedance to change, so that part of the sound energy is reflected back to the sound source. At the same time, under the action of the sound wave, the air column in the aperture vibrates, and the friction damping during the vibration causes part of the sound energy to be converted into heat energy and dissipated, and only a small amount of sound energy is radiated, thereby achieving the purpose of noise reduction. Among them, the first section channel can be divided according to actual conditions to obtain multiple side-by-side channels, such as 3, 4 or 5, and the number of channels after division is not specifically limited here.

[0041] According to the high-position air inlet 10 of the embodiment of the utility model, by improving the main body structure of the high-position air inlet 10, the first section channel 2 is divided into multiple side-by-side channels along the airflow flow direction, and the multiple channels can reflect sound waves and offset part of the sound waves transmitted from the rear section channel 5 to the first section channel 4, thereby reducing the noise at the air inlet 2 of the high-position air inlet 10, and the sound elimination function of the high-position air inlet 10 main body can be achieved by changing the internal structural space of the airflow channel, which can avoid the problems of space tightness and difficult layout caused by the use of an external structure, and can also save the increase in weight cost caused by the external structure. By reasonably designing the overall shape of the high-position air inlet, both the sound elimination effect and the aesthetics of the high-position air inlet 10 are guaranteed.

[0042] In some embodiments, Figure 1 As shown, the plurality of channels include a first channel 41 , a second channel 42 , and a third channel 43 .

[0043] Specifically, a first dividing rib 6 is provided between the first channel 41 and the second channel 42, and a second dividing rib 7 is provided between the second channel 42 and the third channel 43. It can be understood that the air intake duct housing 1 is a hollow tube body formed by blow molding of polyethylene HDPE, and the air intake duct housing 1, the first section channel 4, the rear section channel 5, the first dividing rib 6 and the second dividing rib 7 are integrally formed and connected. Therefore, when manufacturing the high-position air intake duct 10, the air intake duct housing 1, the first section channel 4, the rear section channel 5, the first dividing rib 6 and the second dividing rib 7 can be directly formed by blow molding of polyethylene HDPE. In addition, since only the internal structure design of the high-position air intake duct 10 is improved, and no other structure is connected externally, resulting in space shortage, the first dividing rib 6 and the second dividing rib 7 not only ensure the overall strength of the high-position air intake duct 10, but also do not affect the appearance.

[0044] Among them, it can be combined Figure 2To understand the transmission loss and other conditions of the high-position air intake duct 10 of the embodiment of the utility model, Figure 2 is a graph showing the relationship between engine order frequency and decibel according to an embodiment of the utility model, wherein Figure 2 Curve 1 in the figure is the relationship curve between engine order frequency and decibel when the multi-channel structure is not set. Figure 2 It can be seen that the transmission loss value of the intake system is slightly lower when the engine order frequency is 60Hz, 90Hz, 120Hz, 150Hz, 180Hz, 210Hz, and 240Hz.

[0045] Based on this, the first channel 41, the second channel 42 and the third channel 43 of the embodiment of the utility model are mainly designed for the transmission loss of the intake system when the engine order frequency is 60Hz, 90Hz, 120Hz, 150Hz, 180Hz, 210Hz, and 240Hz. In view of the problem of high noise at the inlet port 2 of the high-position intake duct 10, the high-position intake duct structure design is changed to eliminate the noise of most frequency bands, thereby realizing the high-position intake duct silencing function. The expansion muffler principle uses the sudden change of the cross-section of the pipe to cause the change of the acoustic impedance, so that part of the sound wave can be reflected back to the sound source along the direction of the pipe propagation; at the same time, through the change of the length of the chamber and the inner pipe, the forward propagating sound wave and the reflected wave on different pipe cross sections have a 180º phase difference, which interferes with each other, thereby achieving the purpose of silencing.

[0046] Specifically, it can be combined Figure 3 And formula (1-2) to understand the principle of expansion muffler, Figure 3 Schematic diagram of the expansion cavity transmission loss according to an embodiment of the utility model, wherein: Figure 3 S1 and S2 shown in the figure represent the cross-sectional area of ​​the channel at the noise inlet and the cross-sectional area of ​​the channel at the noise outlet, respectively. In formula (1-2), m is the expansion ratio, that is, the ratio of the cross-sectional area S3 of the channel near the noise outlet to the cross-sectional area S1 of the channel near the noise outlet, L is the expansion cavity length, in m, TL is the transmission loss, in Hz, and λ is the reflection wavelength, in m. According to formula (1-2), as the expansion ratio m increases, the center frequency remains unchanged, and the transmission loss increases accordingly; as the expansion cavity length L increases, the center frequency moves to low frequency, and the transmission loss remains unchanged.

[0047] Formula (1-2)

[0048] In some embodiments, the cross-sectional area of ​​the first channel 41 at one end of the first channel is 0.03 m2 to 0.04 m2, the cross-sectional area of ​​the first channel 41 at the other end of the first channel 4 is 0.015 m2 to 0.017 m2, the cross-sectional area of ​​the second channel 42 at one end of the first channel is 0.04 m2 to 0.05 m2, the cross-sectional area of ​​the second channel 42 at the other end of the first channel 4 is 0.017 m2 to 0.019 m2, and the cross-sectional area of ​​the third channel 43 at one end of the first channel is 0. .03㎡~0.04㎡, the cross-sectional area of ​​the third channel 43 at the other end of the first section channel 4 is 0.014㎡~0.015㎡, the centerline length of the first dividing rib 6 is 200mm~300mm, and the centerline length of the second dividing rib 7 is 700mm~800mm. No specific restrictions are made on the cross-sectional areas of the first channel 41, the second channel 42 and the third channel 43 at both ends of the first section channel 4, the centerline length of the first dividing rib 6 and the centerline length of the second dividing rib 8. For example, in an embodiment of the utility model, the cross-sectional area of ​​the first channel 41 at one end of the first channel 4 can be set to be 0.033 m2, and the cross-sectional area at the other end of the first channel 4 can be set to be 0.016 m2, the cross-sectional area of ​​the second channel 42 at one end of the first channel 4 can be set to be 0.044 m2, and the cross-sectional area at the other end of the first channel 4 can be set to be 0.018 m2, the cross-sectional area of ​​the third channel 43 at one end of the first channel 4 can be set to be 0.033 m2, and the cross-sectional area at the other end of the first channel 4 can be set to be 0.013 m2, the centerline length of the first dividing rib 6 can be 290 mm, and the centerline length of the second dividing rib 7 can be 750 mm.

[0049] A simulation experiment can be conducted for the specifications of the first channel 41, the second channel 42, the third channel 43, the first dividing rib 6 and the second dividing rib 7, as shown in FIG. Figure 2Understand the improvement effect of the transmission loss of the high-position intake duct 10. The three-channel structure designed in the embodiment of the utility model has been verified through simulation analysis and actual measurement that the transmission loss values ​​of the intake system at engine order frequencies of 60Hz, 90Hz, 120Hz, 150Hz, 210Hz, and 240Hz meet the design goals, 20-100Hz: ≥10dB (A), 101-400Hz: ≥14dB (A), that is, when the engine order frequency is in the above frequency range, the transmission loss can reach the above target value, realizing the muffler function. It can be seen that the high-position air intake 10 of the utility model embodiment can realize the change of acoustic impedance caused by the sudden change of the cross-section of the pipeline by dividing the first section channel 4 in the airflow channel into three side-by-side channels along the airflow flow direction, and the cross-sectional areas of the three channels are designed to expand from the direction of sound transmission to the direction of sound transmission, and the chambers and inner pipe lengths of the three channels are designed to be the first channel 41 < the second channel 42 < the third channel 43, so that a part of the sound waves can be reflected back to the sound source along the direction of pipeline propagation, and finally connected with the outside atmosphere. The two designs are combined, and finally the problem of high noise at the air inlet 2 of the high-position air intake 10 can be improved.

[0050] Based on the above, the utility model improves the internal structure of the main body of the high-position air intake duct 10, combines the principle of the expansion muffler, and within the existing vehicle boundaries, designs the interior of the first section channel 4 of the high-position air intake duct 10 into a three-channel form, and realizes the muffler function of the main body of the high-position air intake duct 10 by designing the three-channel chamber and the length of the internal pipe.

[0051] In some embodiments of the utility model, Figure 1 As shown, the high-position air inlet 10 also includes a dust and water discharge valve 8, which is adjacent to the air outlet 3 and connected to the air flow channel. The dust and water discharge valve 8 is used to discharge impurities in the air flow channel. It can be understood that the high-position air inlet 10, as an important part of the air intake system, plays a role in dust and water removal, which is equivalent to a primary filter in the air intake system. When dust, rainwater, etc. enter the air flow channel, they can be discharged from the dust and water discharge valve 8 in time, and will not enter the engine and cause damage to the engine. In addition, setting the dust and water discharge valve 8 at a position close to the air outlet 3 will not affect the air intake of the entire air intake system, nor will it generate resistance to the air flow in the air flow channel, and thus will not affect the power of the engine.

[0052] Furthermore, the outer surface of the air intake housing 1 is configured with a reinforcement groove, which is located on one side of the air intake housing 1 adjacent to the air outlet 4, and the inner surface of the air intake housing 1 is configured with a reinforcement protrusion 9 at a position corresponding to the reinforcement groove. Figure 1 is an internal cross-sectional view of the air intake housing 1, whereby Figure 1 Only the reinforcement projection 9 is shown.

[0053] Specifically, two reinforcement protrusions 9 may be provided on the inner surface of the air inlet housing 1 on the side adjacent to the air outlet 3. The protrusion structure is actually a reinforcement rib, which has the function of reinforcing the air inlet housing 1 and increasing the reliability and pressure resistance of the air inlet housing 1. Furthermore, the reinforcement protrusion 9 and the dust and water discharge valve 8 are all integrally formed with the air inlet housing 1, the first section channel 4, the rear section channel 5, the first separation rib 6 and the second separation rib 7, so that in the industrial production process, the air inlet housing 1, the first section channel 4, the rear section channel 5, the first separation rib 6 and the second separation rib 7, the reinforcement protrusion 9 and the dust and water discharge valve 8 can be blow-molded by polyethylene HDPE.

[0054] Furthermore, in some embodiments, Figure 4 , is a side view of a high-position air intake duct according to an embodiment of the utility model, wherein an air intake grille 21 is provided at the air intake port 2. Specifically, the air intake grille 21 at the air intake port 2 can be injection molded by polyethylene HDPE, wherein the air intake grille 21 includes a plurality of grille plates 211 and a plurality of connecting plates 212, wherein the plurality of grille plates 211 are parallel to each other and are all inclined relative to the air intake direction so that the projection in the air intake direction covers the air intake port 2; the grille plates 211 and the connecting plates 212 extend perpendicularly to each other, and the connecting plates 212 are connected to the plurality of grille plates 211.

[0055] In one embodiment of the present invention, a vehicle is also provided. Figure 5 , which is a block diagram of a vehicle according to an embodiment of the present utility model, wherein the vehicle 100 includes a vehicle body 20 and the high-position air intake duct 10 of the above-mentioned embodiment, and the high-position air intake duct 10 is arranged on the vehicle body 20 .

[0056] According to the vehicle 100 proposed in the embodiment of the utility model, by adopting the high-position air intake 10 of the above-mentioned embodiment and improving the internal structure of the high-position air intake 10 within the existing vehicle boundary, it is not necessary to increase the cost of the vehicle 100 and the noise at the air inlet 2 of the high-position air intake 10 can be reduced, thereby realizing the silencing function at a specific frequency of the engine, enhancing the silencing performance of the whole vehicle, and improving the driving experience of the user.

[0057] Other structures and operations of the vehicle 100 and the high-position air intake 10 according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0059] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A high-position air intake duct, characterized in that: include: An air inlet housing, wherein an air inlet and an air outlet are provided on the air inlet housing, the air inlet and the air outlet are connected to form an air flow channel, and the air inlet and the air outlet face different directions; The airflow channel includes a first section channel near the air inlet and a rear section channel near the air outlet, one end of the first section channel forms the air inlet, the other end of the first section channel is connected to one end of the rear section channel, the other end of the rear section channel forms the air outlet, and the first section channel is divided into a plurality of parallel channels along the airflow direction; Wherein, the plurality of channels are suitable for generating reflected sound waves to offset the sound waves transmitted from the rear channel to the front channel.

2. The high-position air intake duct according to claim 1, characterized in that: The plurality of channels include a first channel, a second channel, and a third channel.

3. The high-position air intake duct according to claim 2, characterized in that: A first dividing rib is disposed between the first channel and the second channel to separate them from each other, and a second dividing rib is disposed between the second channel and the third channel to separate them from each other.

4. The high-position air intake duct according to claim 3, characterized in that: The air intake housing, the first dividing rib and the second dividing rib are integrally formed together.

5. The high-position air intake duct according to claim 3, characterized in that: The centerline length of the first dividing rib is 200 mm to 300 mm, and the centerline length of the second dividing rib is 700 mm to 800 mm.

6. The high-position air intake duct according to claim 1, characterized in that: Also includes: A dust and water discharge valve is provided, the dust and water discharge valve being adjacent to the air outlet and being in communication with the air flow channel, and the dust and water discharge valve being used for discharging impurities in the air flow channel.

7. The high-position air intake duct according to claim 1, characterized in that: The outer surface of the air inlet housing is configured with a reinforcement groove, the reinforcement groove is located on a side of the air inlet housing adjacent to the air outlet, and the inner surface of the air inlet housing is configured with a reinforcement protrusion at a position corresponding to the reinforcement groove.

8. The high-position air intake duct according to claim 2, characterized in that: The cross-sectional area of ​​the first channel at one end of the first channel is 0.03 m2 to 0.04 m2, and the cross-sectional area of ​​the first channel at the other end of the first channel is 0.015 m2 to 0.017 m2; The cross-sectional area of ​​the second channel at one end of the first channel is 0.04 m2 to 0.05 m2, and the cross-sectional area of ​​the second channel at the other end of the first channel is 0.017 m2 to 0.019 m2; The cross-sectional area of ​​the third channel at one end of the first channel is 0.03 m2 to 0.04 m2, and the cross-sectional area of ​​the third channel at the other end of the first channel is 0.014 m2 to 0.015 m2.

9. The high-position air intake duct according to claim 1, characterized in that: The thickness of the air inlet housing is 3 mm to 4 mm, the width of the air inlet along a first direction is 120 mm to 130 mm, and the height of the air inlet along a second direction perpendicular to the first direction is 820 mm to 830 mm; The cross-sectional area of ​​the air inlet is 0.10 m2 to 0.11 m2, and the cross-sectional area of ​​the air outlet is not greater than 0.1 m2.

10. A vehicle, characterized in that: It comprises a vehicle body and the high-position air intake duct as described in any one of claims 1 to 9, wherein the high-position air intake duct is arranged on the vehicle body.

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