CN110005554B

CN110005554B - Acoustic resonator for air guiding system and air guiding system

Info

Publication number: CN110005554B
Application number: CN201811571804.1A
Authority: CN
Inventors: M.梅茨格; R.迪茨
Original assignee: Mann and Hummel GmbH
Current assignee: Mann and Hummel GmbH
Priority date: 2017-12-22
Filing date: 2018-12-21
Publication date: 2023-02-03
Anticipated expiration: 2038-12-21
Also published as: CN110005554A; DE102017012012A1

Abstract

The invention relates to an acoustic resonator (10) integrated into a flow channel (30) of an air guiding system (100), comprising at least one resonance channel (12, 13) with at least one inlet opening (14, 15) and at least one outlet opening (16, 17). The inlet openings (14, 15) are connected to the flow channel (30). The outlet opening (16, 17) is connected to at least one resonant cavity (18, 19) of the air guide system (100). The invention further relates to an air guiding system (100) having an acoustic resonator (10).

Description

Acoustic resonator for air guiding system and air guiding system

Technical Field

The invention relates to an acoustic resonator and an air-guiding system having an acoustic resonator, in particular an air-guiding device of an internal combustion engine of a motor vehicle.

Background

DE 196 18 432 A1 discloses a suction device in which a suction tube in the muffler volume can be opened in a simple manner by means of a tube adapter. By sound propagation in the volume, a helmholtz resonator defined by the volume size is effective, which transmits the propagation of a particular audio frequency range and attenuates further ranges. By parallel connection of the branch pipes (interference pipes), the audio frequency determined on the basis of the interference can be selectively attenuated depending on the length of the branch pipe.

With the arrangement of the additional channel, the sound-damping volume can be coupled to the air filter volume over a large area, so that by this direct coupling, the sound-damping volume is added to the air filter volume which also acts in a sound-damping manner. The so-called helmholtz resonator is determined by the sum of the volumes and is correspondingly low-frequency, which leads to a reduction in noise in the lower rotational speed range of the internal combustion engine.

Disclosure of Invention

The object of the invention is to provide an acoustic resonator for an air-guiding system which can be designed flexibly and integrated inexpensively.

A further object is to provide an air guiding system with an acoustic resonator which can be designed flexibly and integrated inexpensively.

The aforementioned object is achieved with an acoustic resonator which, in conjunction with a flow channel of an air-guiding system, comprises at least one resonant channel having at least one inlet opening and at least one outlet opening, wherein the inlet opening is connected to the flow channel, and wherein the outlet opening is connected to at least one resonant cavity of the air-guiding system, wherein the resonant channel is formed onto the flow channel.

The object is achieved by an air guide system having an acoustic resonator, wherein the resonator is associated with a flow channel, comprising at least one resonance channel having at least one inlet opening and at least one outlet opening, wherein the inlet opening is connected to the flow channel, and wherein the outlet opening is connected to at least one resonance chamber of the air guide system, wherein the resonance channel is formed onto the flow channel.

The acoustic resonator or the air guidance system can be arranged on the initial air side and/or on the pure air side of the air supply device of the internal combustion engine, wherein the "pure air side" represents the flow region downstream of the air cleaning device, in particular the air filter, and the "initial air side" represents the flow region upstream of the air cleaning device.

Advantageous embodiments and advantages of the invention result from the preferred embodiments, the description and the drawings.

An acoustic resonator is proposed, which in conjunction with a flow channel of an air-guiding system comprises at least one resonance channel with at least one inlet opening and at least one outlet opening. The inlet opening is connected to the flow channel and the outlet opening is connected to at least one resonant cavity of the air guidance system, wherein the resonant cavity is formed to the flow channel.

Through the connection between the inlet opening and the flow channel or between the outlet opening and the resonator cavity, an exchange of gas between them can take place or a transmission of pressure vibrations between them can take place. The proposed acoustic resonator can be advantageously installed in particular in an air-guiding system of an air-guiding device of an internal combustion engine. The internal combustion engine may be a self-priming engine or a supercharged engine which is supercharged, for example by means of a turbocharger or a compressor. Such air-guiding systems are usually designed as broadband mufflers in order to attenuate the high-frequency portion of the vibrations caused by the supercharger. With the proposed resonator, for example, the low-frequency component of the vibration of the air column can be damped on the clean air side, which is usually damped on the initial air side or in an additional resonator. With the proposed resonator, additional components can be dispensed with, since the resonator can be inexpensively combined with the flow channel of the air-guiding system. Such air guidance systems are usually implemented as plastic components, so that demolding of the single component can be advantageously implemented when the resonator is integrated into the flow channel.

The sucked-in air can thus reach through the inlet opening of the resonance channel and be guided into the outer resonance chamber arranged in the flow channel. Pressure vibrations in the air are guided into the resonant cavity in the resonant channel leading to the discharge opening. By suitable design of the geometry of the components, specific frequencies of resonance can be excited and thus attenuated in the charge air column.

The chamber of the broadband silencer can be used advantageously in particular as a resonator, which utilizes a longer inflow of the resonant channel. In a common embodiment, the chamber of the broadband silencer is embodied essentially with an aperture pattern for broadband sound measures. The cavity is also used alone as a resonator with a very short resonant channel length, since the elongation of the channel length is limited by the subsequent access to the outer wall of the housing. The demolding-technically advantageous solution described here allows a longer channel length for the resonator in order to thereby attenuate further frequency ranges. The frequencies which could hitherto only be suitably attenuated by additional resonators located outside the broadband muffler can be attenuated by the acoustic resonator according to the invention also inside the broadband muffler.

Advantageously, the resonant channel may be formed directly onto the flow channel. It is particularly advantageous if the resonance channel is formed onto the flow channel substantially over its entire length, in particular in the longitudinal direction. In an advantageous embodiment, the flow channel and the resonance channel share a common wall section. In this way, the resonant ducts can be advantageously combined with the flow duct in a compact or space-saving manner and at the same time can be produced inexpensively, since the demolding of the flow duct during the injection molding process can be advantageously carried out, so that no additional installation step of the resonant ducts is required.

According to an advantageous embodiment, the at least one resonant cavity can be formed between the flow duct and a housing wall of the housing of the air guide system. The structural space which is present in this way inside the housing of the air guide system can be advantageously utilized. At the same time, the entire air-guiding system can be designed with an advantageous installation space, since the resonant cavity can therefore be designed to be technically compact in terms of installation space.

According to an advantageous embodiment, the air guide system can be designed as a broadband silencer in order to reduce the high-frequency portion of the vibrations caused by the turbocharger. With the proposed resonator, a further, for example low-frequency component of the vibration of the air column, which is usually damped on the initial air side of the sucked-in air, can additionally be damped on the clean air side. This effectively reduces the wide high-frequency range of the air column vibration.

According to an advantageous embodiment, the air guide system can have at least one sound-damping chamber for damping the flowing air, which is formed between the flow duct and the housing wall. The outer wall of the flow duct in the region of the sound-damping chamber can have a plurality of openings which connect to the sound-damping chamber. In the case of a simultaneously compact embodiment of the sucked-in air, the chamber between the flow channel and the outer wall of the housing of the air guide system can advantageously be utilized as a sound-damping chamber.

According to an advantageous embodiment, the openings of the different sound-damping chambers can have different cross sections. The openings can have different cross sections in order to thus effectively attenuate a wide frequency band of the sound vibrations.

According to an advantageous embodiment, the discharge opening of the resonance channel can be arranged between a resonance chamber and an adjacent sound damping chamber, and/or on a separating wall between two resonance chambers and/or between a resonance chamber and an adjacent sound damping chamber. This allows a stable arrangement of the resonant ducts and a spatially advantageous arrangement of the resonant cavities in the air guidance system. The length of the available positions in the air guiding system can also be advantageously exploited.

According to an advantageous embodiment, the resonant cavity can be arranged upstream of one or more sound-damping cavities. In this way, the low-frequency and high-frequency components of the vibrating air column can be attenuated. The flow channel can also be advantageously demoulded together with the integrated resonance channel after the injection moulding process.

According to an advantageous embodiment, the resonant cavity can be arranged between two sound-damping cavities. An alternative arrangement provides an arrangement with a sound-damping chamber before and after the resonant chamber. A greater length of the resonant channel in the air guiding system can thereby be achieved, whereby further specific frequencies or frequency ranges can be appropriately filtered out.

According to a further embodiment, the inlet opening of the resonant channel can be arranged in the sound-damping chamber at the front in the flow direction. The reverse sequence is likewise possible, since the flow direction is only acoustically less important. As long as possible a resonant channel can thus also be arranged in the air guidance system, whereby further specific frequencies or frequency ranges can be appropriately filtered out.

According to an advantageous embodiment, the acoustic resonator may comprise at least two resonator channels, wherein the discharge opening may be arranged, for example, in an outer resonator cavity and the discharge opening may be arranged in an adjacent resonator cavity, for example, in a next built-in resonator cavity. In this way, it is possible for the acoustic resonator to be designed for two different frequency ranges, since the resonant channel can have a greater length than the further resonant channel. Resonant channels having a longer length may therefore attenuate different frequencies or frequency ranges than further resonant channels.

According to an advantageous embodiment, the resonant channel can be formed by an outer wall of the flow channel and the housing wall. A further advantageous embodiment provides that the resonant duct is delimited on one side by the outer wall of the flow duct and on the other side by the housing wall. In this way, a particularly advantageous design of the components, i.e. the flow channel and the housing, with respect to demolding during the injection molding process can be achieved.

According to an advantageous embodiment, the cover of the resonant channel can be designed as a separate component. In this way, open resonant ducts can be formed on the flow duct, which are subsequently closed in a further working step by means of a separate cover. Thereby, the demoulding of the flow channel with the shaped resonance channel can be further simplified.

According to an advantageous embodiment, the resonant channel can be arranged inside the flow channel. In this way, the flow channel can be implemented as compactly as possible, so that the air guide system can be advantageously installed in the engine space in terms of installation space. The demolding of the flow channel can therefore also be designed simply after the injection molding process.

According to a further aspect of the invention, an air guiding system, in particular an air guiding device, of a turbocharged internal combustion engine is proposed, having an acoustic resonator, wherein the resonator is associated with a flow channel. The air guiding system comprises at least one resonance channel with at least one inlet opening and at least one outlet opening. The inlet opening is connected to the flow channel and the outlet opening is connected to at least one resonant cavity of the air guiding system.

The proposed air guide system can have an integrated acoustic resonator and is therefore particularly advantageously installed as part of an air guide device of a turbocharged internal combustion engine. Such air-guiding systems are usually designed as broadband mufflers in order to attenuate the high-frequency portion of the vibrations caused by the turbocharger. With the proposed resonator, it is additionally possible, for example, to attenuate the low-frequency component of the vibration of the air column on the clean air side, which is generally attenuated on the primary air side of the air guiding device. With the proposed resonator, additional components can be dispensed with, since the resonator can be inexpensively combined with the flow channel of the air-guiding system. Advantageously, such an air guiding system is implemented as a plastic component, so that demolding of the single component can be advantageously implemented when the resonator is integrated into the flow channel.

According to an advantageous embodiment, the at least one resonant cavity can be formed between the flow duct and a housing wall of the housing of the air guide system. In this way, the available installation space in the housing of the air guide system can be advantageously utilized. At the same time, the entire air-guiding system can be designed with an advantageous installation space, since the resonant cavity can therefore be designed to be technically compact in terms of installation space.

According to an advantageous embodiment, the air guide system can be designed as a broadband silencer and comprises at least one silencing chamber for silencing the flowing air, which is designed between the flow duct and the housing wall. The outer wall of the flow channel in the region of the sound-damping chamber can have a plurality of openings which are connected to the sound-damping chamber.

With the proposed resonator, for example, the low-frequency and/or high-frequency component of the vibration of the air column, which can be caused, for example, by a supercharger, can be damped on the clean air side, which is generally damped on the initial air side of the sucked-in air. Thereby a wide frequency range of the vibration of the column of air can be effectively attenuated.

Drawings

Further advantages are obtained from the following description of the figures. Embodiments of the invention are shown in the drawings. The figures, description and embodiments contain a number of features in combination. The features are also expediently regarded as individual by the person skilled in the art and summarized as meaningful further combinations. By way of example:

FIG. 1 shows a partially cut-away isometric view of an air-guiding system having one acoustic resonator and three broadband muffling chambers according to a design of the present invention;

FIG. 2 shows an isometric view of the air guiding system with the housing closed according to FIG. 1;

FIG. 3 shows a longitudinal section through the air guiding system according to FIG. 1;

FIG. 4 shows a cross-sectional view through the air guiding system according to FIG. 1;

fig. 5 shows a further cross-sectional view through the air guiding system according to fig. 1;

FIG. 6 shows an isometric view, partly in section, of an air guidance system with one acoustic resonator and three broadband damping chambers according to a further design of the invention;

FIG. 7 shows a partially cut-away isometric view of an air guidance system according to a further embodiment of the invention, with two acoustic resonators, two resonance channels leading to the resonators and two broadband damping chambers;

FIG. 8 shows a longitudinal section through the air guide system according to FIG. 7;

FIG. 9 shows a cross-sectional view through the air guiding system according to FIG. 7;

fig. 10 shows a further cross-sectional view through the air guiding system according to fig. 7;

FIG. 11 shows a cut-away isometric view of an air guide system according to a further design of the invention;

FIG. 12 shows a cut-away isometric view of an air guidance system according to a further design of the invention; and

fig. 13 shows a cut-away isometric view of a flow channel of an air guiding system according to a further design of the invention.

Detailed Description

In the drawings, identical or similar components are provided with the same reference numerals. The drawings are only for purposes of illustration and are not to be construed as limiting.

Fig. 1 shows an isometric view, partly in section, of an air guidance system 100 according to an embodiment of the present invention, with one acoustic resonator 10 and three

broadband damping chambers

50, 54, 58. The air guide system 100 has a flow channel 30 which is divided into four different sections and is enclosed by a housing 38 having an upper housing part 40 and a lower housing part 42. The flow channel 30 is guided at its ends in a sealing manner out of the housing 38 by means of an inlet 32 and an outlet 34.

The air guide system 100 has in this example a resonant cavity 18 and a

sound damping cavity

50, 54, 58 at the rear end in the flow direction (illustrated by means of an arrow at the inlet 32), which are separated from one another by sealed separating

walls

62, 64, 66 in order to cause sound decoupling. A sound-deadening

chamber

50, 54, 58 for muffling the flowing air is formed between the flow duct 30 and the housing wall 38, wherein the outer wall 36 of the flow duct 30 in the region of the sound-deadening

chamber

50, 54, 58 has a plurality of

openings

52, 56, 60, which connect the sound-deadening

chamber

50, 54, 58. The

openings

52, 56, 60 of the different sound-damping

chambers

50, 54, 58 have different diameters, so that different frequency ranges of the flowing air can be damped. The air guiding system 100 is thus configured as a broadband silencer.

The resonant cavity 18 is formed between the flow channel 30 and a housing wall 44 of the housing 38 of the air guiding system 100.

The acoustic resonator 10 is associated with the flow channel 30 of the air guiding system 100. The resonator 10 includes a resonant channel 12 having an inlet opening 14 and an outlet opening 16. The inlet opening 14 is connected to the flow channel 30 and the outlet opening 16 is connected to the resonant cavity 18 of the air guiding system 100.

The resonant passages 12 are formed directly into the flow channel 30. The discharge opening 16 of the resonance channel 12 is arranged on the separating wall 62 between the resonance chamber 18 and the adjacent sound-damping chamber 50 in order to thus make full use of the maximum possible length of the resonance channel 12.

The airflow enters the air directing system 100 in the direction of the arrows. The air flow can thus reach the inlet opening 14 and the pressure oscillations reach the outlet opening 16 through the resonance channel 12. From there the vibrations extend into the free space of the resonant cavity 18. As a result, the resonance effect of the acoustic resonator 10 can act in order to thus result in a reduction of the low-frequency and/or high-frequency portion of the acoustic vibration of the vibrating air column.

Fig. 2 shows an isometric view of the air guide system 100 with the housing 38 closed according to fig. 1, while in fig. 3 a longitudinal section through the air guide system 100 according to fig. 1 is shown. Fig. 4 and 5 show two cross-sectional views through the air guide system 100 according to fig. 1 at different depths.

In fig. 2, two housing halves, namely a housing upper part 40 and a housing lower part 42, can be seen, which can be joined together at a circumferential joint line, for example welded or glued. Alternatively, the housing can also be designed, for example, as a cylinder and/or be joined together, for example, in the axial direction, by two housing halves.

The sequence of the resonant cavity 18 and the three sound-damping

cavities

50, 54, 58, which have

different diameter openings

52, 56, 60 in the flow duct 30, respectively, can be clearly seen in fig. 3. The sound-deadening

chambers

50, 54, 58 are acoustically separated by separating

walls

62, 64, 66. Separating

walls

62, 64, 66 connects flow passage 30 with wall 44 of housing 38 and helps to stiffen the entire housing 38 and air direction system 100. The outlet 34 is covered in fig. 3.

Fig. 4 shows the resonant duct 12 in the region of the outlet opening 16, in a sectional view of the air-guiding system 100, through which the vibrating air is connected to the resonant cavity 18. The resonant channel 12 between the inlet opening 14 and the outlet opening 16 is shown in section in fig. 5.

It is also evident from fig. 3, 4 and 5 that the resonant channel 12 with the inlet opening 14 and the outlet opening 16 is formed directly on the flow channel 12 and is therefore constructed in one piece therewith.

Further embodiments are shown in fig. 6 to 13. In order to avoid unnecessary repetition, only the differences from the first embodiment are discussed in the description.

Fig. 6 shows a partially cut-away isometric view of an air guidance system 100 according to a further embodiment of the invention, with one acoustic resonator 10 and three

broadband damping chambers

50, 54, 58. In this embodiment, the resonant cavity 18 is disposed between the two sound-attenuating

cavities

50, 54. The inlet opening 14 of the resonance channel 12 is arranged in the region of the sound-damping chamber 50 and extends along this sound-damping chamber 50. The resonant channel 12 leads through a separating wall 62 between the sound-damping cavity 50 and the resonant cavity 18. The discharge opening 16 of the resonance channel 12 is arranged on a separating wall 64 leading to the next sound-damping chamber 54. In this way, longer resonant ducts 12 can be realized, whereby further frequencies or frequency ranges of the vibrating air column of the air guiding system 100 can be damped.

Fig. 7 shows an isometric partial cross-sectional view of an air guidance system 100 according to a further embodiment of the invention, with two

acoustic resonators

10, 11, two

resonant channels

12, 13 and two

broadband damping chambers

54, 58. The two

resonance channels

12, 13 are formed parallel to each other side by side to the flow channel 30. Two

entrance openings

14, 15 are arranged at the open end of the outer resonator cavity 18. The discharge opening 16 of the first resonance channel 12 is arranged in an outer resonance chamber 18, while the discharge opening 17 of the second resonance channel 13 is arranged in a next built-in resonance chamber 19. It is thereby possible to implement the length of the second resonant channel 13 significantly longer, so that both frequency ranges of the air flow in the air guidance system 100 can be attenuated.

Fig. 8 shows a longitudinal section through the air guide system 100 according to fig. 7, so that the sequence of the two

resonant chambers

18 and 19 and the two sound-damping

chambers

54 and 58 of the broadband silencer can be seen.

Fig. 9 and 10 also show two cross-sectional views through the air guide system 100 according to fig. 7 at different depths. In fig. 9, the second resonance channel 13 of the second resonator 11 is cut away in its course. The first resonance channel 12 of the first resonator 10 to the discharge opening 16 of the first resonance cavity 16 is shown in a cross-sectional view. In fig. 10, the two

resonant ducts

12 and 13 are cut away in their course.

Fig. 11 shows a cut-away isometric view of an air guidance system 100 according to a further design of the invention. In this embodiment, the resonant channel 12 is formed by the outer wall 36 of the flow channel 30 and the housing wall 44 of the housing 38 of the air guiding system 100. For this purpose, the resonant channel 12 is formed as an open channel with a U-shaped cross section on the flow channel 30. Furthermore, the outer wall 44 of the housing 38 is deep drawn radially from the outside at the location of the resonant channel 12, so that the wall 44 closes off the resonant channel 12 in the form of a cover 20. A sealed resonant channel 12 can be achieved in this way when the cover is hermetically closed with the U-shaped part of the resonant channel 12, for example by welding or gluing the cover.

Fig. 12 shows a cut-away isometric view of an air guide system 100 according to a further embodiment of the invention. In this embodiment, the cover 20 of the resonant channel 12 is constructed as a separate component. The resonant channel 12 is also formed here as an open channel with a U-shaped cross section on the flow channel 30. Furthermore, the wall 36 of the flow channel 30 on the lower side of the resonant channel 12 is gradually pulled back towards the interior of the flow channel 30 and thus constitutes the inlet opening 14 of the resonant channel 12 to the interior of the flow channel 30. A separately manufactured cover 20 is placed onto the open side of the resonance channel 12 and is sealingly connected with the resonance channel, for example welded or glued. In this way a sealed resonance channel 12 can also be realized.

Fig. 13 shows a cut-away isometric view of the flow channel 30 of the air guiding system 100 according to a further design of the invention. Here, the resonance passage 12 is arranged inside the flow passage 30. The resonant channel 12 is also formed here onto the flow channel 30, however from the inside thereof. On its front side, the resonance channel 12 has an inlet opening 14 for letting in flowing air from the interior of the flow channel 30. The resonant channel 12 opens into an opening in the wall of the flow channel 30, which opens as an outlet opening 16 into an externally arranged resonant cavity 18.

Claims

1. An acoustic resonator (10) in combination with a flow channel (30) of an air guiding system (100), comprising at least one resonance channel (12, 13) with at least one inlet opening (14, 15) and at least one outlet opening (16, 17), wherein the inlet opening (14, 15) is connected with the flow channel (30) and wherein the outlet opening (16, 17) is connected with at least one resonance cavity (18, 19) of the air guiding system (100), wherein the resonance channel (12, 13) is formed in a longitudinal direction from the inner side of the flow channel onto the flow channel (30) over substantially its entire length, the flow channel and the resonance channel sharing a common wall section, wherein the resonance channel (12, 13) is arranged inside the flow channel (30).

2. The acoustic resonator according to claim 1, wherein the at least one resonant cavity (18, 19) is configured between the flow channel (30) and a housing wall (44) of a housing (38) of the air guiding system (100).

3. The acoustic resonator according to claim 1 or 2, wherein the air-guiding system (100) is configured as a broadband silencer.

4. The acoustic resonator according to claim 3, wherein the air guide system (100) has at least one sound-deadening chamber (50, 54, 58) for muffling the flowing air, wherein the sound-deadening chamber (50, 54, 58) is configured between the flow channel (30) and the housing wall (44), wherein an outer wall (36) of the flow channel (30) in the region of the sound-deadening chamber (50, 54, 58) has a number of openings (52, 56, 60) which are connected to the sound-deadening chamber (50, 54, 58).

5. The acoustic resonator according to claim 3 or 4, wherein the openings (52, 56, 60) of different sound-damping chambers (50, 54, 58) have different cross-sections.

6. The acoustic resonator (10) according to any of claims 3 to 5, wherein the discharge opening (16, 17) of the resonance channel (12, 13) opens into the resonance chamber (18) and is arranged between the separating wall and the adjacent sound-deadening chamber (50, 54) and/or the adjacent resonance chamber (18, 19) and/or the housing wall (44) of the housing (38).

7. The acoustic resonator according to any of claims 3 to 5, wherein the discharge opening (16, 17) of the resonance channel (12, 13) opens into the resonance chamber (18), wherein the discharge opening (16, 17) is arranged on a separating wall (62, 64, 66) between the resonance chamber (18) and an adjacent sound-deadening chamber (50, 54).

8. The acoustic resonator according to any of claims 3-7, wherein the resonance cavity (18, 19) is arranged before or after one or more sound-damping cavities (50, 54, 58) in the flow direction of the air.

9. The acoustic resonator according to any of claims 3-7, wherein the resonant cavity (18, 19) is arranged between two sound-deadening cavities (50, 54).

10. The acoustic resonator according to claim 9, wherein the inlet openings (14, 15) of the resonance channels (12, 13) are arranged in the area of the sound-deadening chamber (50) in front of or behind in the flow direction and are connected with the flow channel.

11. The acoustic resonator according to any of claims 1-10, comprising two resonance channels (12, 13), wherein the discharge opening (16) is arranged in an outer resonance cavity (18) and the discharge opening (17) is arranged in the next built-in resonance cavity (19).

12. The acoustic resonator according to any of claims 1-11, wherein the resonance channel (12, 13) is formed by an outer wall (36) of the flow channel (30) and a housing wall (44).

13. The acoustic resonator according to any of claims 1-11, wherein the cover (20) of the resonance channel (12, 13) is constructed as a separate member.

14. Air guiding system (100) of an internal combustion engine with an acoustic resonator (10) according to any of the preceding claims, wherein the resonator (10) is integrated into a flow channel (30) comprising at least one resonance channel (12, 13) with at least one inlet opening (14, 15) and at least one outlet opening (16, 17), wherein the inlet opening (14, 15) is connected with the flow channel (30), and wherein the outlet opening (16, 17) is connected with at least one resonance cavity (18, 19) of the air guiding system (100), wherein the resonance channel (12, 13) is shaped onto the flow channel (30).

15. The air directing system of claim 14 wherein the air directing system is an air directing device.