Air inlet channel assembly

Abstract

The invention provides an air inlet channel assembly, relates to the field of air inlet cavities, and adopts the scheme that the air inlet channel assembly comprises an air inlet cavity body, an air inlet and an air outlet are formed in the air inlet cavity body, a main partition plate is arranged in the air inlet cavity body, and an air inlet cavity and a resonant cavity are formed in the two sides of the main partition plate respectively; the resonant cavity is located on the side, away from the air inlet, in the air inlet cavity body, the resonant cavity is sequentially provided with a first resonant cavity, a second resonant cavity and a third resonant cavity from top to bottom, a partition plate is arranged between the first resonant cavity and the second resonant cavity, a partition block is arranged between the second resonant cavity and the third resonant cavity, and the partition plate is provided with a first air inlet and a second air outlet. The separation blocks and the main separation plate are of an integrated structure. The noise reduction effect can be improved.

Description

Technical Field

[0001] The invention relates to the field of air intake cavities, and in particular to an air intake duct assembly. Background Art

[0002] The intake duct assembly is an important part of the air intake system of a truck. It is responsible for air intake guidance, dust and moisture pre-filtration, and providing relatively clean air for the air filter assembly. It also reduces intake noise.

[0003] In the prior art, a Chinese invention patent with a patent application announcement number of CN103266970A discloses an air intake duct assembly, including an air intake cavity body, an air intake grille, a support column, a bellows and a bellows support wire; the air intake grille and the support column are riveted to the air intake cavity body by rivets, the bellows support wire is placed inside the bellows, and the bellows is fixed to the bottom of the air intake cavity by a clamp; the air intake cavity body includes an air intake cavity and an air inlet and an air outlet connected to the air intake cavity, and the air intake cavity is divided into left and right parts, the right cavity is the air intake cavity, which connects the air inlet and the air outlet and plays the role of conveying air; the left cavity is a resonance cavity, except that there is a channel in the middle part that is connected to the air intake cavity body, the other parts are not connected to the two cavities, there are discharge holes in the air intake cavity body and the bottom of the resonance cavity, and there are discharge holes in the air intake cavity body and the bottom of the resonance cavity.

[0004] The working principle of the resonant cavity is to use the principle of air resonance to reduce the propagation of sound waves. It can be regarded as a closed cavity with a certain size and shape, which is filled with air. When the sound wave enters the resonant cavity, a standing wave will be formed inside it. At this time, the air molecules will continuously vibrate back and forth between two adjacent wave nodes, thereby consuming the energy of the sound wave, so that the sound wave is absorbed and dissipated. However, with the above technical solution, due to the setting of a single resonant cavity, the length of the single resonant cavity and the air inlet cavity is almost the same, the internal volume of the resonant cavity is large, it is difficult to form a standing wave, and the absorption effect on the sound wave is weak. Summary of the invention

[0005] In order to solve the technical problem of poor noise reduction effect of the air intake cavity in the above-mentioned prior art, the present invention provides an air intake duct assembly that can improve the noise reduction effect.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: an air intake duct assembly, including an air intake cavity body, the air intake cavity body is provided with an air inlet and an air outlet, a main partition plate is provided in the air intake cavity body, the two sides of the main partition plate are respectively an air intake cavity and a resonance cavity, the resonance cavity is located on the side of the air intake cavity body away from the air inlet, the resonance cavity is provided with resonance cavity one, resonance cavity two and resonance cavity three from top to bottom, a partition plate is provided between the resonance cavity one and the resonance cavity two, a partition block is provided between the resonance cavity two and the resonance cavity three, the partition block and the main partition plate are an integrated structure, and the cross-sectional areas of the resonance cavity one, the resonance cavity two and the resonance cavity three are all different.

[0007] The present invention can continuously reduce the noise at different positions of the airflow by setting resonance cavity one, resonance cavity two and resonance cavity three inside the air inlet cavity body. At the same time, by setting different cross-street areas, the noise in different frequency bands can be reduced. Compared with single-cavity noise reduction, it is easier to generate multiple resonances along the direction of airflow movement, and the noise reduction effect is stronger.

[0008] Furthermore, a secondary partition plate is provided inside the air inlet cavity body and at the lower side of the air inlet, the secondary partition plate is arranged opposite to the main partition plate, a resonance cavity four is formed between the secondary partition plate and the inner wall of the air inlet cavity body, the resonance cavity four is arranged opposite to the resonance cavity three and are respectively located on both sides of the air inlet cavity.

[0009] The present invention arranges resonance cavity four on the air inlet side, which cooperates with resonance cavity one, resonance cavity two and resonance cavity three to achieve resonance in different directions of airflow, form a surround noise reduction effect, and further improve the noise reduction capability.

[0010] Furthermore, the resonance cavity one is located at the corner of the upper end of the air inlet cavity body, the resonance cavity two is arranged opposite to the air inlet, the resonance cavity two is a right-angled trapezoidal structure, the wide end of the resonance cavity two is located at the upper part, and the width of the resonance cavity three is greater than the width of the narrow end of the resonance cavity two.

[0011] The present invention can increase the cross-sectional width of the air intake cavity and reduce the increasing effect of the second resonance cavity on the air intake resistance by setting the second resonance cavity as a right-angle trapezoidal structure.

[0012] Furthermore, the main partition plate located on one side of the resonance cavity 2 and the resonance cavity 3 and the auxiliary partition plate located on one side of the resonance cavity 4 are both provided with reinforcing ribs, and the partition block is provided with a reinforcing grille.

[0013] The present invention enhances the strength of the main partition plate and the auxiliary partition plate by arranging reinforcing ribs, thereby preventing deformation from affecting the noise reduction effect or increasing the air intake resistance.

[0014] Furthermore, the main partition plate includes a guide part 1 and a guide part 2, the guide part 1 is located at the upper end of the main partition plate, and the guide part 2 is located at the side of the partition block, the guide part 1 and the guide part 2 are both arc-shaped structures, and the guide part 1 and the guide part 2 both protrude in the direction away from the air inlet.

[0015] The present invention ensures smooth transition of airflow and reduces intake resistance by providing the first and second flow guide parts.

[0016] Furthermore, a guide plate is horizontally arranged in the air inlet cavity body and at the lower part of the resonance cavity three.

[0017] The present invention can avoid the formation of vortices in the lower part of the resonance cavity three by arranging the guide plate, ensure that the airflow enters the air outlet smoothly, and greatly reduce the influence of the resonance cavity three on the movement of the airflow.

[0018] Furthermore, a water retaining rib is provided at the upper end of the air inlet cavity. The water retaining rib is arranged obliquely downward and has an arc-shaped structure. The water retaining rib protrudes in the direction away from the air inlet, and the lower end of the water retaining rib is located at the upper end of the auxiliary partition plate. A water guide plate is provided on one side of the auxiliary partition plate, and the water guide plate extends into a discharge hole 1 on the outer wall of the air inlet cavity body.

[0019] The present invention can enhance the blocking effect on water and dust in the airflow by arranging the water retaining strip and the water guide plate, making it easier to collect and discharge the water and dust.

[0020] Furthermore, at least three water retaining ribs 2 are arranged from top to bottom in the middle of the air inlet cavity, and the water retaining ribs 2 are arranged obliquely downward and the upper ends thereof are connected to the main partition plate.

[0021] The present invention can further enhance the barrier effect on moisture and dust in the airflow by arranging a plurality of water retaining ribs 2, thereby enhancing the filtering function of the air inlet cavity body.

[0022] Furthermore, a second discharge hole is provided on one side of the bottom of the air inlet cavity body, and the lower end of the second water retaining rib at the lowest end is located above the second discharge hole.

[0023] The present invention discharges the water and dust collected by the second water retaining rib by arranging the second discharge hole.

[0024] Furthermore, a third water retaining rib is provided at the lower part of the air inlet cavity, the third water retaining rib is in a "<" structure and opens toward the air outlet, and a third discharge hole is provided on the other side of the air inlet cavity body.

[0025] The present invention further collects and discharges water and dust in the airflow by arranging three water retaining ribs and three discharge holes.

[0026] It can be seen from the above technical solutions that the present invention has the following advantages: The present invention provides an air intake duct assembly, which can continuously reduce the noise of airflow at different stages by arranging resonance chamber 1, resonance chamber 2 and resonance chamber 3 inside the air intake chamber body. Compared with single-chamber noise reduction, it is easier to generate multiple resonances along the airflow moving direction, and the noise reduction effect is stronger; by arranging resonance chamber 4 on the air inlet side, it can achieve resonance in different directions of the airflow by coordinating with resonance chamber 1, resonance chamber 2 and resonance chamber 3, forming a surround noise reduction effect, and further improving the noise reduction capability; by setting resonance chamber 2 to a right-angle trapezoidal structure, the cross-sectional width of the air intake chamber can be increased, and the increasing effect of resonance chamber 2 on the air intake resistance can be reduced; by arranging reinforcing ribs to strengthen the main partition plate and the strength of the auxiliary partition plate to avoid deformation that affects the noise reduction effect or increases the intake resistance; by setting the guide part one and the guide part two, the smooth transition of the airflow is guaranteed and the intake resistance is reduced; by setting the guide plate, the formation of vortices in the lower part of the resonance cavity three can be avoided, the airflow can be guaranteed to smoothly enter the air outlet, and the influence of the resonance cavity three on the movement of the airflow can be greatly reduced; by setting the water retaining strip one and the water guide plate, the blocking effect on moisture and dust in the airflow can be enhanced, making it easier to collect and discharge; by setting a plurality of water retaining ribs two, the blocking effect on moisture and dust in the airflow can be further enhanced, and the filtering function of the air intake cavity body can be enhanced; by setting the discharge hole two, the water and dust collected by the water retaining rib two can be discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention.

[0029] Figure 2 It is the narrowband spectrum of the specific implementation mode of the present invention and the existing air intake.

[0030] Figure 3 It is a flow field diagram of a specific implementation mode of the present invention.

[0031] Figure 4 This is the flow field diagram of the existing air inlet.

[0032] Figure 5 It is a schematic diagram of dust distribution according to a specific embodiment of the present invention.

[0033] Figure 6 Schematic diagram of dust distribution in the existing air intake duct.

[0034] Figure 7 It is a schematic diagram of moisture distribution according to a specific embodiment of the present invention.

[0035] Figure 8 Schematic diagram of moisture distribution in the existing air intake duct.

[0036] In the figure, 1, air inlet; 2, resonance cavity one; 3, partition; 4, resonance cavity two; 5, partition block; 6, resonance cavity three; 7, guide plate; 8, water retaining rib three; 9, discharge hole three; 10, air outlet; 11, discharge hole two; 12, water retaining rib two; 13, resonance cavity four; 14, secondary partition plate; 15, guide part one; 16, guide part two; 17, water retaining rib one; 18, water guide plate; 19, main partition plate. DETAILED DESCRIPTION

[0037] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0038] like Figure 1 As shown, this specific embodiment provides an air intake duct assembly, including an air intake cavity body, on which an air intake port 1 and an air outlet port 10 are arranged, the air intake port 1 is provided with an air intake grille, a main partition plate 19 is arranged in the air intake cavity body, and the two sides of the main partition plate 19 are respectively an air intake cavity and a resonance cavity, the resonance cavity is located on the side of the air intake cavity body away from the air intake port 1, and the resonance cavity is provided with resonance cavity one 2, resonance cavity two 4 and resonance cavity three 6 from top to bottom, a partition plate 3 is arranged between resonance cavity one 2 and resonance cavity two 4, a partition block 5 is arranged between resonance cavity two 4 and resonance cavity three 6, the partition block 5 and the main partition plate 19 are an integrated structure, and the cross-sectional areas of resonance cavity one 2, resonance cavity two 4 and resonance cavity three 6 are all different.

[0039] This specific embodiment arranges resonance cavity 1 2, resonance cavity 2 4 and resonance cavity 3 6 inside the air inlet cavity body, which can continuously reduce the noise of the airflow at different stages. At the same time, different cross-street areas are arranged to reduce the noise of different frequency bands. Compared with the single-cavity noise reduction method in the prior art, it is easier to generate multiple resonances along the direction of airflow movement, and has a stronger noise reduction effect.

[0040] like Figure 1As shown, in order to further enhance the noise reduction effect, in the present specific embodiment, a secondary partition plate 14 is provided in the air inlet cavity body and at the lower side of the air inlet 1, the secondary partition plate 14 is arranged opposite to the main partition plate 19, and a resonance cavity four 13 is formed between the secondary partition plate 14 and the inner wall of the air inlet cavity body, the resonance cavity four 13 is arranged opposite to the resonance cavity three 6 and are respectively located on both sides of the air inlet cavity; by setting the resonance cavity four 13, resonance can be generated in different directions of the airflow, thereby forming a surround noise reduction effect and further improving the noise reduction capability.

[0041] like Figure 1 As shown, in order to enhance the strength of the main partition plate 19 and the auxiliary partition plate 14, reinforcing ribs are provided on the main partition plate 19 located on one side of the resonance cavity 2 4 and the resonance cavity 3 6, and reinforcing ribs are provided on the auxiliary partition plate 14 located on one side of the resonance cavity 4 13, and a reinforcing grille is provided on the partition block 5.

[0042] like Figure 1 As shown, in order to reduce the influence of the setting of the resonance cavity on the airflow and ensure a good noise reduction effect, in the present specific embodiment, the resonance cavity 1 2 is located at the corner of the upper end of the air inlet cavity body, the resonance cavity 2 4 is arranged opposite to the air inlet 1, the resonance cavity 2 4 is a right-angled trapezoidal structure, the wide end of the resonance cavity 2 4 is located at the upper part, and the width of the resonance cavity 3 6 is greater than the width of the narrow end of the resonance cavity 2 4; by setting the resonance cavity 2 4 as a right-angled trapezoidal structure, the cross-sectional width of the air inlet cavity can be gradually increased, and the increasing effect of the resonance cavity 2 4 on the air inlet resistance can be reduced. At the same time, the cross-sectional dimensions of the resonance cavity 1, the resonance cavity 2 and the resonance cavity 3 are different, which can eliminate noise in multiple frequency bands and enhance the noise reduction effect.

[0043] like Figure 1 As shown, since the dimensions of the connection between the resonance cavity 1 2 and the resonance cavity 2 4, and the resonance cavity 2 4 and the resonance cavity 3 6 are all changed, they are all special areas where the airflow converges faster in the intake velocity flow field line. In order to ensure smooth movement and peaceful transition of the airflow and reduce the influence of the resonance cavity setting on the airflow, the main partition plate 19 includes a guide part 15 and a guide part 2 16. The guide part 15 is located at the upper end of the main partition plate 19, and the guide part 2 16 is located on the side of the partition block 5. The upper end of the guide part 2 16 is connected to the narrow end of the resonance cavity 2 4, and the lower end of the guide part 2 16 is basically flush with the lower end surface of the intake grille. The guide part 15 and the guide part 16 are connected to the narrow end of the resonance cavity 2 4, and the lower end of the guide part 2 16 is basically flush with the lower end surface of the intake grille. The guide part 1 and the guide part 2 16 are both arc-shaped structures, and the guide part 1 15 and the guide part 2 16 both protrude in the direction away from the air inlet 1; through the guiding effect of the guide part 1 15 and the guide part 2 16, the arc lines are used to achieve a smooth transition of the airflow, reduce the blocking effect of the size change on the movement of the airflow, and ensure that the airflow has a higher flow rate when reaching the air inlet 1; further, a guide plate 7 is horizontally arranged in the air inlet cavity body and located at the lower part of the resonance cavity three 6. By setting the guide plate 7, it is possible to avoid the formation of vortices in the lower part of the resonance cavity three 6, ensure that the airflow smoothly enters the air outlet 10, and greatly reduce the influence of the resonance cavity three 6 on the movement of the airflow.

[0044] like Figure 1 As shown, in order to enhance the filtering effect of the air intake duct assembly, in the specific embodiment, a water retaining rib 17 is provided at the upper end of the air intake cavity. The water retaining rib 17 is arranged obliquely downward and is an arc-shaped structure. The water retaining rib 17 protrudes in the direction away from the air intake port 1, and the lower end of the water retaining rib 17 is located at the upper end of the auxiliary partition plate 14. A water guide plate 18 is provided on one side of the auxiliary partition plate 14. The water guide plate 18 extends into the discharge hole 1 of the outer wall of the air intake cavity body; at least three water retaining ribs 12 are provided from top to bottom in the middle of the air intake cavity. The water retaining rib 12 is arranged obliquely downward and its upper end is connected to the main partition plate 19. A discharge hole 11 is provided on one side of the bottom of the air intake cavity body, and the lower end of the lowest water retaining rib 12 is located above the discharge hole 11. In the specific embodiment, four water retaining ribs 12 are provided, and the water retaining rib 12 is provided at the lower part of the air intake cavity. The rib strip three 8, the water retaining rib strip three 8 is in a "<" structure and its opening faces the air outlet 10, and a discharge hole three 9 is arranged on the other side of the air inlet cavity body; after the airflow enters the air inlet cavity body, under the action of the water retaining rib strip one 17, the moisture in the airflow is condensed and adheres to the dust in the airflow, and is discharged from the discharge hole one under the guiding action of the water retaining rib strip one 17 and the water guide plate 18, thereby realizing the first filtration; as the airflow goes downward, it passes through four water retaining rib strips two 12, thereby realizing the second collection of moisture and dust and discharging from the discharge hole two 11; finally, it passes through the water retaining rib strip three 8, and under the action of the water retaining rib strip three 8, thereby realizing the third collection of moisture and dust and discharging them from the discharge hole two 11 and the discharge hole three 9 respectively; after three filtration actions, the moisture and dust entering the air filter are greatly reduced, the service life of the air filter is extended, and the maintenance cost is reduced.

[0045] In this specific embodiment, the main partition plate 19, the reinforcing ribs, the secondary partition plate 14, the partition plate, the partition block 5, the water retaining rib 17, the water retaining rib 2 12 and the water retaining rib 3 8 and the air inlet cavity body are integrally injection molded.

[0046] The specific implementation method of this invention is to improve the noise reduction performance of the intake duct assembly while reducing the overall intake resistance, ensuring the smoothness of the intake air flow field, while taking into account the water separation performance and dust separation effect of the intake cavity. Four resonance cavities are added on both sides of the gas dynamic line inside the intake cavity body, which helps to reduce the low-frequency noise within 500HZ of the intake part. After measurement and arrangement of multiple resonance cavities, the minimum intake cross-sectional area in the vibration-proof intake cavity body is 0.1㎡, which meets the requirements of intake volume and minimum intake resistance; the flow diversion design is carried out inside the intake cavity body, which can make the air enter the air filter more smoothly, reduce the intake resistance, and improve the stability of the airflow; at the same time, water retaining ribs are arranged in multiple places to enhance the separation effect of water, dust and airflow, and prevent the airflow from carrying more water and dust into the air filter.

[0047] like Figure 2 As shown, the transmission loss of the specific implementation and the air intake cavity without the resonant cavity and the guide design (hereinafter referred to as the existing air intake duct) is evaluated by the narrow-band spectrum of the acoustic finite element simulation method (the simulation range is 50-6000Hz, and the simulation resolution is 5Hz). From the frequency curve, it can be seen that the air intake cavity of the specific implementation has an average reduction of 15dB in the entire frequency range, especially for low-frequency noise within 500HZ, it has a significant noise reduction effect; further, as Figure 3 and Figure 4 As shown, it can be seen from the flow field diagram, especially in the middle position, that although multiple resonant cavities are set in this specific embodiment, the flow velocity in the middle is significantly higher than that in the existing air inlet due to the relevant flow guide design. It can be seen that this specific embodiment achieves the technical effect of taking into account both noise reduction and ensuring smooth gas flow; Figure 5 and Figure 6 As shown, the particle aggregation density at the second outlet of this specific embodiment is significantly greater than that of the existing air inlet, and most of the dust is discharged through the second outlet. It can be seen that this specific embodiment has a good gas-dust separation effect; Figure 7 and Figure 8 As shown, the water accumulation density at the second and first outlets of this specific embodiment is significantly greater than that of the existing air inlet duct. It can be seen that this specific embodiment has a better water-gas separation effect.

[0048] From the above specific implementations, it can be seen that the present invention has the following beneficial effects: 1. By arranging the resonance cavity 1 2, the resonance cavity 2 4 and the resonance cavity 3 6 inside the air inlet cavity body, it is possible to continuously reduce the noise of the airflow at different stages. Compared with the single cavity noise reduction, it is easier to generate multiple resonances along the airflow moving direction, and the noise reduction effect is stronger; 2. By arranging the resonance cavity 4 13 on the side of the air inlet 1, and cooperating with the resonance cavity 1 2, the resonance cavity 2 4 and the resonance cavity 3 6, resonance can be generated in different directions of the airflow, forming a surround noise reduction effect, and further improving the noise reduction capability; 3. By setting the resonance cavity 24 to a right-angle trapezoidal structure, the cross-sectional width of the air intake cavity can be increased, and the effect of the resonance cavity 24 on the increase of the air intake resistance can be reduced; 4. The strength of the main partition plate 19 and the auxiliary partition plate 14 is enhanced by providing reinforcing ribs to prevent deformation from affecting the noise reduction effect or increasing the intake resistance; 5. By providing the guide part 15 and the guide part 2 16, a smooth transition of airflow is ensured and air intake resistance is reduced; 6. The water retaining strip 1 and the water guide plate 18 can enhance the barrier effect on water and dust in the airflow, making it easier to collect and discharge; 7. By providing a plurality of water retaining ribs 12, the water and dust blocking effect in the air flow can be further enhanced, thereby enhancing the filtering function of the air inlet cavity body; 8. The water and dust collected by the water retaining rib 12 are discharged by setting the discharge hole 11; 9. By providing the guide plate 7, it is possible to avoid the formation of vortices in the lower part of the resonance cavity 3 6, ensuring that the airflow smoothly enters the air outlet 10, greatly reducing the influence of the resonance cavity 3 6 on the movement of the airflow.

[0049] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An air intake duct assembly, comprising an air intake cavity body, wherein the air intake cavity body is provided with an air inlet (1) and an air outlet (10), characterized in that: A main partition plate (19) is arranged in the air inlet cavity body, and the two sides of the main partition plate (19) are respectively an air inlet cavity and a resonance cavity, and the resonance cavity is located in the air inlet cavity body on a side away from the air inlet port (1). The resonance cavity is provided with resonance cavity 1 (2), resonance cavity 2 (4) and resonance cavity 3 (6) in order from top to bottom, a partition plate (3) is arranged between the resonance cavity 1 (2) and the resonance cavity 2 (4), and a partition block (5) is arranged between the resonance cavity 2 (4) and the resonance cavity 3 (6), and the partition block (5) and the main partition plate (19) are an integrated structure, and the cross-sectional areas of the resonance cavity 1 (2), the resonance cavity 2 (4) and the resonance cavity 3 (6) are all different.

2. The air intake assembly according to claim 1, characterized in that: A secondary partition plate (14) is arranged inside the air inlet cavity body and at the lower side of the air inlet port (1); the secondary partition plate (14) is arranged opposite to the main partition plate (19); a resonance cavity four (13) is formed between the secondary partition plate (14) and the inner wall of the air inlet cavity body; the resonance cavity four (13) is arranged opposite to the resonance cavity three (6) and is respectively located on both sides of the air inlet cavity.

3. The air intake assembly according to claim 2, characterized in that: The resonant cavity 1 (2) is located at the corner of the upper end of the air inlet cavity body, the resonant cavity 2 (4) is arranged opposite to the air inlet (1), the resonant cavity 2 (4) is in a right-angle trapezoidal structure, the wide end of the resonant cavity 2 (4) is located at the upper part, and the width of the resonant cavity 3 (6) is greater than the width of the narrow end of the resonant cavity 2 (4).

4. The air intake assembly according to any one of claims 2 to 3, characterized in that: The main partition plate (19) located on one side of the second resonance cavity (4) and the third resonance cavity (6) and the auxiliary partition plate (14) located on one side of the fourth resonance cavity (13) are both provided with reinforcing ribs, and the partition block (5) is provided with a reinforcing grille.

5. The air intake assembly according to claim 4, characterized in that: The main partition plate (19) comprises a guide portion 1 (15) and a guide portion 2 (16), wherein the guide portion 1 (15) is located at the upper end of the main partition plate (19), and the guide portion 2 (16) is located at the side of the partition block (5), and both the guide portion 1 (15) and the guide portion 2 (16) are arc-shaped structures, and both the guide portion 1 (15) and the guide portion 2 (16) protrude in a direction away from the air inlet (1).

6. The air intake assembly according to claim 5, characterized in that: A guide plate (7) is horizontally arranged in the air inlet cavity body and located at the lower part of the resonance cavity three (6).

7. The air intake assembly according to claim 6, characterized in that: A water retaining rib (17) is provided at the upper end of the air inlet cavity. The water retaining rib (17) is arranged obliquely downward and is an arc-shaped structure. The water retaining rib (17) protrudes in a direction away from the air inlet (1), and the lower end of the water retaining rib (17) is located at the upper end of the auxiliary partition plate (14). A water guide plate (18) is provided on one side of the auxiliary partition plate (14), and the water guide plate (18) extends into a discharge hole (1) on the outer wall of the air inlet cavity body.

8. The air intake assembly according to claim 7, characterized in that: At least three water retaining ribs (12) are arranged from top to bottom in the middle of the air inlet cavity. The water retaining ribs (12) are arranged obliquely downward and their upper ends are connected to the main partition plate (19).

9. The air intake assembly according to claim 8, characterized in that: A second discharge hole (11) is provided at one side of the bottom of the air inlet cavity body, and the lower end of the second water retaining rib (12) at the lowest end is located above the second discharge hole (11).

10. The air intake assembly according to claim 9, characterized in that: A third water retaining rib (8) is provided at the lower part of the air inlet cavity. The third water retaining rib (8) is in a "<" structure and opens toward the air outlet (10). A third discharge hole (9) is provided on the other side of the air inlet cavity body.

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