Silencing device and vehicle

Abstract

The invention discloses a noise elimination device and a vehicle, and relates to the technical field of noise elimination, the noise elimination device comprises a shell, a first cavity and a second cavity which are arranged in the first direction are formed in the shell, the shell is provided with a medium inlet, the second cavity is provided with two connected sub-flow channels, the two sub-flow channels are connected in a bent mode and communicate with each other, and the medium inlet is communicated with the medium inlet; one sub-flow channel is communicated with the medium inlet, and the other sub-flow channel is communicated with the first cavity; the film is arranged in the first cavity and fixedly arranged on the shell. The thin film is arranged in the first cavity, in the process that noise is transmitted to the thin film, part of sound energy is absorbed by viscous damping of the thin film and converted into heat energy, part of sound energy is reflected and scattered for multiple times in pores of the thin film, energy is gradually attenuated, the mass block is arranged on the thin film, the target frequency of the silencing device can be controlled, and the silencing effect is improved. Therefore, the vibration mode of the film can resonate with the incident sound wave of the noise, and the effect of effectively absorbing the noise is achieved under the condition that the ventilation function is not affected.

Description

Technical Field

[0001] The present invention relates to the technical field of noise reduction, and in particular to a noise reduction device and a vehicle having the noise reduction device. Background Art

[0002] In the related technology, the engine of a vehicle not only plays the core role of driving the vehicle, but is also the main source of noise. In addition, the noise reduction equipment used in the intake and exhaust ducts needs to meet certain ventilation requirements. If sufficient ventilation space is reserved, the sound absorption performance of the entire structure will be significantly reduced. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a muffler that can effectively absorb incident sound waves without affecting the ventilation function.

[0004] According to an embodiment of the present invention, the silencer device includes: a shell, a first chamber and a second chamber arranged along a first direction are formed in the shell, the shell has a medium inlet, the second chamber has two connected sub-channels, the two sub-channels are bent and connected and communicated, one sub-channel is communicated with the medium inlet, and the other sub-channel is communicated with the first chamber; a film, the film is arranged in the first chamber and fixed to the shell; a mass block, the mass block is arranged in the first chamber, and the mass block is fixed to the film.

[0005] According to the silencer device of the embodiment of the present invention, a thin film is arranged in the first chamber. In the process of noise being transmitted to the thin film, part of the sound energy is absorbed by the viscous damping of the thin film and converted into heat energy, and part of the sound energy undergoes multiple reflections and scattering in the pores of the thin film, resulting in the gradual attenuation of energy. In addition, by arranging a mass block on the thin film, the target frequency of the silencer device can be controlled so that the vibration mode of the thin film can resonate with the incident sound wave of the noise, thereby achieving the effect of effectively absorbing noise without affecting the ventilation function.

[0006] In some embodiments of the present invention, the mass block is disposed on the upper surface of the film.

[0007] In some embodiments of the present invention, there are multiple mass blocks, and the multiple mass blocks are arranged along the first direction.

[0008] In some embodiments of the present invention, the mass block is a plate-shaped structure.

[0009] In some embodiments of the present invention, the two sub-flow channels are arranged sequentially along the first direction.

[0010] In some embodiments of the present invention, the shell includes: a shell body and a partition assembly, the shell body defines an installation cavity, the partition assembly is arranged in the installation cavity and fixed to the shell body, the partition assembly divides the installation cavity into a first chamber and two sub-channels, and the shell body forms a medium inlet.

[0011] In some embodiments of the present invention, the partition assembly includes: a first partition plate, a shell body having a first wall portion and a second wall portion that are opposite and spaced apart along a second direction, the first direction and the second direction being perpendicular, the first partition plate extending along the second direction to separate the installation cavity into a first chamber and a second chamber, and along the second direction, one end of the first partition plate is fixedly connected to the first wall portion, and the other end of the first partition plate is spaced apart from the second wall portion to form a first connecting port connecting the first chamber and the second chamber.

[0012] In some embodiments of the present invention, along the second direction, a spacing distance between the film and the first wall portion is smaller than a spacing distance between the film and the second wall portion.

[0013] In some embodiments of the present invention, the partition assembly also includes: a second partition plate, the second partition plate is arranged in the second chamber, the first partition plate and the second partition plate are arranged in sequence and spaced apart along the first direction, the second partition plate extends along the second direction to divide the second chamber into two sub-channels, one end of the second partition plate along the second direction is fixedly connected to the second wall portion, and the other end of the second partition plate along the second direction is spaced apart from the first wall portion to form a first connecting port connecting the two sub-channels.

[0014] In some embodiments of the present invention, a medium inlet is formed on the second wall portion, and the sub-flow channel away from the first chamber along the first direction is communicated with the medium inlet.

[0015] In some embodiments of the present invention, along the second direction, the medium inlet and the corresponding sub-channel are correspondingly arranged.

[0016] In some embodiments of the present invention, the housing is a split piece.

[0017] A vehicle according to an embodiment of the present invention includes the muffler device of the above embodiment.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through 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 schematic structural diagram of a muffler according to an embodiment of the present invention;

[0021] Figure 2 is a cross-sectional view of a muffler according to an embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of multiple silencer devices in parallel according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] Silencer 100;

[0025] Shell 1;

[0026] First chamber 11; first communication port 111;

[0027] Second chamber 12; medium inlet 13;

[0028] Sub-channel 14; second communication port 141;

[0029] Shell body 15; mounting cavity 151; first wall portion 152; second wall portion 153;

[0030] Partition assembly 16; first partition plate 161; second partition plate 162;

[0031] Shell body 17; first side wall 18; second side wall 19;

[0032] Film 2;

[0033] Mass block 3. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] Reference below Figure 1-Figure 3 A noise reduction device 100 according to an embodiment of the present invention is described.

[0036] like Figure 1 and Figure 2 As shown, the silencer 100 according to an embodiment of the present invention includes: a shell 1, in which a first chamber 11 and a second chamber 12 arranged along a first direction are formed, the shell 1 has a medium inlet 13, the second chamber 12 has two connected sub-channels 14, the two sub-channels 14 are bent and connected and communicated, one sub-channel 14 is communicated with the medium inlet 13, and the other sub-channel 14 is communicated with the first chamber 11; a film 2, the film 2 is arranged in the first chamber 11 and fixed to the shell 1; a mass block 3, the mass block 3 is arranged in the first chamber 11, and the mass block 3 is fixed to the film 2.

[0037] As some embodiments of the present application, the housing 1 can be made of nylon. The housing 1 can be regarded as a Helmholtz resonant cavity, and a first chamber 11 and a second chamber 12 are formed in the housing 1. The first chamber 11 and the second chamber 12 are arranged along a first direction. Figure 1 The housing 1 has a medium inlet 13, through which noise can enter the housing 1. Further, noise can enter the second chamber 12 through the medium inlet 13, and then enter the first chamber 11 through the second chamber 12. The second chamber 12 has two sub-channels 14, which are connected so that noise can enter the first chamber 11 through the two sub-channels 14 in sequence.

[0038] The two sub-channels 14 are connected and communicated by bending, and one sub-channel 14 is communicated with the medium inlet 13, and the other sub-channel 14 is communicated with the first chamber 11, so that the first chamber 11 can be communicated with the medium inlet 13 through the two sub-channels 14, which is beneficial for the noise to enter one sub-channel 14 through the medium inlet 13, and then pass through the other sub-channel 14 to flow into the first chamber 11. Such an arrangement can make the layout of the second chamber 12 reasonable, which is beneficial for extending the path for the noise to enter the first chamber 11, so that part of the sound energy of the noise is gradually attenuated during the transmission process, thereby improving the noise reduction effect of the noise reduction device 100.

[0039] As some embodiments of the present application, the film 2 can be constructed of TPU (thermoplastic polyurethane elastomer rubber) material. As some embodiments of the present application, the film 2 and the shell 1 can be connected by injection molding and inlaying, so that the film 2 is fixed to the shell 1. Further, the film 2 is arranged in the first chamber 11, so that the film 2 is arranged at a relatively inner position of the shell 1, so that the position of the film 2 is reasonably set, and based on the standing wave formation and energy conversion mechanism of the sound wave in the first chamber 11, when the incident sound wave frequency of the noise matches the natural frequency of the first chamber 11, significant air pressure and flow velocity fluctuations are generated inside the first chamber 11, and the vibration mode of the film 2 in the first chamber 11 can resonate with the incident sound wave of the noise. At this time, the sound wave energy is efficiently coupled into the first chamber 11, and then converted into mechanical vibration energy of the air in the first chamber 11. Due to the damping effect of the second chamber 12, this part of energy is eventually dissipated in the form of heat energy, thereby achieving effective absorption of sound waves of a specific frequency, and further enabling the silencer 100 to achieve an effect of effectively absorbing noise without affecting the ventilation function.

[0040] The mass block 3 is arranged in the first chamber 11, and further, the mass block 3 is fixed to the film 2. As some embodiments of the present application, the mass block 3 and the film 2 can be adhesively connected so that the mass block 3 is fixed to the film 2. By arranging the mass block 3 on the film 2, based on the local resonance mechanism and the acoustic-vibration coupling effect, when the sound wave is incident on the film 2, it will cause the film 2 to vibrate, and then cause the mass block 3 on the film 2 to vibrate. This vibration can convert the energy of the sound wave into mechanical vibration energy, and further dissipate it into heat energy through the damping mechanism, thereby achieving a sound elimination effect, and can also increase the dynamic mass of the silencer 100, so that the silencer 100 can achieve resonance in a wider frequency range, thereby effectively controlling the target frequency and improving the absorption efficiency of the silencer 100 for low-frequency noise.

[0041] Specifically, the natural frequency calculation method of the first chamber 11 is as follows:

[0042]

[0043] Wherein, c is the air sound speed, V is the cavity volume of the shell 1, l is the length of the second chamber 12 along the second direction, that is, the length of hn, and A is the cross-sectional area of ​​the second chamber 12; the design of the first chamber 11 allows it to selectively reduce narrowband noise, and its resonant frequency and bandwidth can be precisely controlled by adjusting the cavity volume of the shell 1 and the size of the second chamber 12.

[0044] The sound elimination principle of the film 2 material: based on the energy conversion and dissipation mechanism when sound waves interact with the film 2 material and the shell 1 material. When the sound wave is incident on the film 2, part of the sound energy is absorbed by the viscous damping of the film 2 and converted into heat energy; part of the sound energy undergoes multiple reflections and scattering in the pore structure of the film 2, resulting in the gradual attenuation of energy; at the same time, the vibration mode of the film 2 can resonate with the incident sound wave, further enhancing the energy absorption effect. In addition, the geometric characteristics and acoustic structure design of the film 2, such as the size and arrangement of the micropores, will also affect the interference and scattering behavior of the sound wave, thereby achieving efficient noise control within a specific frequency range.

[0045] The amount of sound insulation expressed in decibels is called sound insulation or transmission loss, represented by the symbol TL (transmission loss), and is defined as:

[0046]

[0047] Among them, n I is the inverse of the transmission coefficient, t I is the sound intensity transmission coefficient, that is, the sound intensity transmission coefficient is the sound intensity of the transmitted wave I t and the incident wave intensity I i The ratio is calculated as follows:

[0048]

[0049] Among them, p ta 、p ia are the air pressure at the exit and incident ends respectively, ρ1 and c1 are the ambient air density and the speed of sound respectively.

[0050] By using COMSOL to perform modeling and simulation tests, it can be found that the muffler 100 with the Helmholtz resonance structure, the film 2 and the mass block 3 can have both sound absorption and sound insulation functions, and has a better noise reduction effect than traditional noise reduction materials. By changing hn and hs, the length and cavity volume of the second chamber 12 can be changed, and by changing the material and size of the mass block 3, the purpose of controlling the operating frequency of the first chamber 11 can be achieved.

[0051] Furthermore, if Figure 3 As shown, in order to achieve the purpose of broadband silencer, multiple silencer devices 100 are connected to the pipeline through a parallel design through a vibration friction welding process, and the amplitude, center frequency and bandwidth of the sound insulation of each silencer device 100 are different, so that the best coordination effect of multiple silencer devices 100 can be achieved.

[0052] Therefore, by arranging the film 2 in the first chamber 11, in the process of noise being transmitted to the film 2, part of the sound energy is absorbed by the viscous damping of the film 2 and converted into heat energy, and part of the sound energy undergoes multiple reflections and scattering in the pores of the film 2, resulting in the gradual attenuation of energy. In addition, by arranging the mass block 3 on the film 2, the target frequency of the silencer 100 can be controlled, so that the vibration mode of the film 2 can resonate with the incident sound wave of the noise, thereby achieving the effect of effectively absorbing the noise without affecting the ventilation function.

[0053] In some embodiments of the present invention, Figure 2 As shown, the mass block 3 is arranged on the upper surface of the film 2 .

[0054] Among them, along the height direction of the silencer 100, the film 2 has two opposite surfaces, and the mass block 3 is arranged on the upper surface of the film 2. Such an arrangement can make the position of the mass block 3 reasonably arranged. Compared with arranging the mass block 3 on the lower surface of the film 2, the tension between the mass block 3 and the film 2 can be converted into the pressure of the mass block 3 on the film 2, thereby reducing the risk of the mass block 3 falling off the film 2 after the silencer 100 has been used for a period of time, effectively improving the structural stability of the silencer 100, and thus improving the service life of the silencer 100.

[0055] In some embodiments of the present invention, Figure 2 As shown, there are multiple mass blocks 3, and the multiple mass blocks 3 are arranged along the first direction.

[0056] Among them, as some embodiments of the present application, two mass blocks 3 can be provided. As some embodiments of the present application, three mass blocks 3 can be provided. By providing multiple mass blocks 3, and multiple mass blocks 3 are arranged along the first direction, the arrangement of the mass blocks 3 can be flexible, and the muffler 100 can select a suitable number of mass blocks 3 according to the characteristics of the noise, thereby effectively controlling the target frequency, which is conducive to the effective absorption of the target noise by the muffler 100.

[0057] In some embodiments of the present invention, Figure 2 As shown, the mass block 3 is a plate-like structure.

[0058] Among them, as some embodiments of the present application, the mass block 3 can be constructed as a semicircular plate-like structure. As some embodiments of the present application, the mass block 3 can be constructed as a polygonal plate-like structure. However, the present application is not limited thereto, and the mass block 3 can also be constructed as a plate-like structure of other shapes, as long as the mass block 3 is constructed as a plate-like structure. By constructing the mass block 3 as a plate-like structure, the contact area between the mass block 3 and the film 2 can be increased, which is conducive to the effective dispersion of the stress of the mass block 3 by the film 2, and the risk of damage to the film 2 during the resonance process is reduced.

[0059] In some embodiments of the present invention, Figure 2 As shown, the two sub-channels 14 are arranged in sequence along the first direction.

[0060] Among them, along the first direction, that is, Figure 1 In the X direction, the two sub-channels 14 are arranged in sequence. Such an arrangement can make the arrangement of the two sub-channels 14 reasonable, which is conducive to the noise being transmitted into the first cavity along a fixed path, so that the vibration mode of the film 2 can resonate with the incident sound wave, reducing the risk of silencer failure of the silencer 100 due to resonance failure, thereby improving the working reliability of the silencer 100.

[0061] In some embodiments of the present invention, Figure 2 As shown, the shell 1 may include: a shell body 15 and a partition component 16, the shell body 15 defines an installation cavity 151, the partition component 16 is arranged in the installation cavity 151 and fixed to the shell body 15, the partition component 16 divides the installation cavity 151 into a first chamber 11 and two sub-channels 14, and the shell body 15 is formed with a medium inlet 13.

[0062] The shell body 15 defines a mounting cavity 151, and the mounting cavity 151 may be formed with an opening, which is the medium inlet 13 of the above embodiment, that is, the shell body 15 is formed with a medium inlet 13, and noise can enter the mounting cavity 151 of the shell body 15 from the medium inlet 13. The partition component 16 is arranged in the mounting cavity 151. As some embodiments of the present application, the partition component 16 and the shell body 15 can be inlaid together so that the partition component 16 is fixedly connected to the shell body 15. The partition component 16 can separate the mounting cavity 151 into a first chamber 11 and two sub-channels 14, and the first chamber 11 and the two sub-channels 14 are bent and connected in sequence and communicated, which is conducive to the noise entering the first chamber 11 through the medium inlet 13 and the two sub-channels 14 in sequence, so that the noise can be transmitted into the first chamber 11 along a fixed path, so that the vibration mode of the film 2 can resonate with the incident sound wave of the noise, which is conducive to achieving the effect of the muffler 100 effectively absorbing the noise.

[0063] In some embodiments of the present invention, Figure 2 As shown, the partition assembly 16 may include: a first partition plate 161, the shell body 15 has a first wall portion 152 and a second wall portion 153 that are opposite and spaced apart along the second direction, the first direction and the second direction are perpendicular, the first partition plate 161 extends along the second direction to separate the installation cavity 151 into a first chamber 11 and a second chamber 12, along the second direction, one end of the first partition plate 161 is fixedly connected to the first wall portion 152, and the other end of the first partition plate 161 is spaced apart from the second wall portion 153 to form a first connecting port 111 connecting the first chamber 11 and the second chamber 12.

[0064] Among them, along the second direction, that is, Figure 1 The first direction is perpendicular to the second direction, that is, the X direction is perpendicular to the Y direction. The shell body 15 has a first wall portion 152 and a second wall portion 153 that are oppositely disposed, and the first wall portion 152 and the second wall portion 153 are spaced apart from each other to form a space for installing the partition assembly 16 between the first wall portion 152 and the second wall portion 153. The first partition plate 161 is extended along the second direction to separate the installation cavity 151 into the first chamber 11 and the second chamber 12. Along the second direction, the first partition plate 161 has two opposite ends, and one end of the first partition plate 161 can be fixedly connected to the first wall portion 152 by but not limited to inlaying, bonding, etc., and the other end of the first partition plate 161 is spaced apart from the second wall portion 153 to form a first connecting port 111 connecting the first chamber 11 and the second chamber 12 between the other end of the first partition plate 161 and the second wall portion 153, thereby facilitating the noise to enter the first chamber 11 from the second chamber 12 through the first connecting port 111, thereby achieving the effect of the silencer 100 successfully silencing the noise.

[0065] In some embodiments of the present invention, Figure 2 As shown, along the second direction, the spacing distance between the film 2 and the first wall portion 152 is smaller than the spacing distance between the film 2 and the second wall portion 153 .

[0066] Among them, the spacing distance between the film 2 and the first wall portion 152 along the second direction is smaller than the spacing distance between the film 2 and the second wall portion 153 along the second direction, that is, the film 2 is arranged at the middle and upper position of the first wall portion 152 and the second wall portion 153. Such an arrangement can make the position of the film 2 reasonably arranged, which is conducive to the vibration mode of the film 2 to resonate with the incident sound wave of the noise, and further facilitates the effect of the muffler 100 on effectively absorbing noise. It should be noted that the spacing distance between the film 2 and the first wall portion 152 can be adjusted. By adjusting the spacing distance between the film 2 and the first wall portion 152, the purpose of controlling the working frequency of the cavity of the first chamber 11 is achieved, so that the muffler 100 can muffle different noises, thereby expanding the application range of the muffler 100.

[0067] In some embodiments of the present invention, Figure 2 As shown, the partition assembly 16 may also include: a second partition plate 162, the second partition plate 162 is arranged in the second chamber 12, the first partition plate 161 and the second partition plate 162 are arranged in sequence and spaced apart along the first direction, the second partition plate 162 extends along the second direction to separate the second chamber 12 into two sub-channels 14, one end of the second partition plate 162 along the second direction is fixedly connected to the second wall portion 153, and the other end of the second partition plate 162 along the second direction is spaced apart from the first wall portion 152 to form a second connecting port 141 connecting the two sub-channels 14.

[0068] The partition assembly 16 may further include a second partition plate 162. The second partition plate 162 and the first partition plate 161 are arranged in sequence along the first direction, and the second partition plate 162 and the first partition plate 161 are spaced apart from each other so that a sub-flow channel 14 is formed between the second partition plate 162 and the first partition plate 161. The second partition plate 162 is disposed in the second chamber 12, and the second partition plate 162 is extended along the second direction to divide the second chamber 12 into two sub-flow channels 14. Along the second direction, the second partition plate 162 has two opposite ends, and one end of the second partition plate 162 can be fixedly connected to the second wall portion 153 by but not limited to inlaying, bonding, etc., and the other end of the second partition plate 162 is spaced apart from the first wall portion 152 to form a second connecting port 141 connecting the two sub-channels 14 between the other end of the second partition plate 162 and the first wall portion 152, thereby facilitating noise from the sub-channel 14 connected to the medium inlet 13 to enter the sub-channel 14 close to the first chamber 11 through the second connecting port 141, and then enter the first chamber 11 through the first connecting port 111, thereby allowing the noise to smoothly enter the first chamber 11, thereby achieving the effect of the silencer 100 smoothly silencing the noise.

[0069] In some embodiments of the present invention, Figure 2 As shown, the second wall portion 153 is formed with a medium inlet 13 , and along the first direction, the sub-flow channel 14 away from the first chamber 11 is communicated with the medium inlet 13 .

[0070] Among them, along the first direction, the sub-channel 14 away from the first chamber 11 is connected with the medium inlet 13, so that the noise can flow into the sub-channel 14 away from the first chamber 11 through the medium inlet 13, which is beneficial for the noise to enter the sub-channel 14 close to the first chamber 11 through the second connecting port 141 from the sub-channel 14 connected with the medium inlet 13, and then enter the first chamber 11 through the first connecting port 111, so that the noise can smoothly enter the first chamber 11, and achieve the effect of the silencer 100 to smoothly silence the noise. In addition, such an arrangement can make the structural design of the silencer 100 reasonable, and facilitate the production of the silencer 100.

[0071] In some embodiments of the present invention, Figure 2 As shown, along the second direction, the medium inlet 13 and the corresponding sub-channel 14 are correspondingly arranged.

[0072] Among them, along the second direction, the medium inlet 13 and the corresponding sub-channel 14 are arranged correspondingly, that is, along the second direction, the orthographic projection of the medium inlet 13 and the orthographic projection of the corresponding sub-channel 14 coincide with each other. Such an arrangement can make the relative positions of the medium inlet 13 and the corresponding sub-channel 14 reasonable, which is conducive to the smooth transmission of noise.

[0073] In some embodiments of the present invention, Figure 1As shown, the housing 1 is a split component.

[0074] Among them, since the first chamber 11 and the two sub-channels 14 are bent and connected in sequence and communicated, the shell 1 cannot be constructed as an integrally formed part. By constructing the shell 1 as a split part, the processing difficulty of the shell 1 can be reduced. As some embodiments of the present application, the shell 1 may include: a shell body 17, a first side wall 18 and a second side wall 19. Along the third direction, the first side wall 18 and the second side wall 19 are respectively located on both sides of the shell body 15. By processing the shell body 17, the first side wall 18 and the second side wall 19 separately and connecting them by hot plate welding, the shell 1 can be smoothly processed and formed, thereby reducing the processing difficulty of the silencer 100.

[0075] The vehicle according to the embodiment of the present invention includes the muffler 100 of the above embodiment. By arranging the film 2 in the first chamber 11, in the process of the incident sound wave being transmitted to the film 2, part of the sound energy is absorbed by the viscous damping of the shell 1 and converted into heat energy, and part of the sound energy undergoes multiple reflections and scattering in the pores of the shell 1, resulting in the gradual attenuation of energy, and the vibration mode of the film 2 can resonate with the incident sound wave of the noise, so that the muffler 100 can achieve the effect of effectively absorbing the incident sound wave without affecting the ventilation function.

[0076] 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 present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0077] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art 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 muffler, characterized in that: include: A shell, wherein a first chamber and a second chamber arranged along a first direction are formed in the shell, the shell has a medium inlet, the second chamber has two connected sub-flow channels, the two sub-flow channels are bent and connected and communicated, one of the sub-flow channels is communicated with the medium inlet, and the other sub-flow channel is communicated with the first chamber; a film, the film being disposed in the first chamber and fixed to the housing; A mass block is disposed in the first chamber and fixed to the film.

2. The muffler device according to claim 1, characterized in that: The mass block is arranged on the upper surface of the film.

3. The muffler device according to claim 1, characterized in that: There are a plurality of mass blocks, and the plurality of mass blocks are arranged along the first direction.

4. The muffler device according to claim 1, characterized in that: The mass block is a plate-shaped structure.

5. The muffler device according to claim 1, characterized in that: The two sub-flow channels are arranged in sequence along the first direction.

6. The muffler device according to claim 5, characterized in that: The shell comprises: a shell body and a partition assembly, the shell body defines an installation cavity, the partition assembly is arranged in the installation cavity and fixed to the shell body, the partition assembly divides the installation cavity into the first chamber and the two sub-channels, and the shell body forms the medium inlet.

7. The muffler device according to claim 6, characterized in that: The partition assembly includes: a first partition plate, the shell body having a first wall portion and a second wall portion that are opposite and spaced apart along a second direction, the first direction and the second direction being perpendicular, the first partition plate extending along the second direction to separate the mounting cavity into the first chamber and the second chamber, and along the second direction, one end of the first partition plate is fixedly connected to the first wall portion, and the other end of the first partition plate is spaced apart from the second wall portion to form a first connecting port connecting the first chamber and the second chamber.

8. The muffler device according to claim 7, characterized in that: Along the second direction, a spacing distance between the film and the first wall portion is smaller than a spacing distance between the film and the second wall portion.

9. The muffler device according to claim 7, characterized in that: The partition assembly also includes: a second partition plate, which is arranged in the second chamber, the first partition plate and the second partition plate are arranged in sequence and spaced apart along the first direction, the second partition plate extends along the second direction to divide the second chamber into two sub-channels, one end of the second partition plate along the second direction is fixedly connected to the second wall portion, and the other end of the second partition plate along the second direction is spaced apart from the first wall portion to form a first connecting port connecting the two sub-channels.

10. The muffler device according to any one of claims 7 to 9, characterized in that: The second wall portion is formed with the medium inlet, and along the first direction, the sub-flow channel away from the first chamber is communicated with the medium inlet.

11. The muffler device according to claim 10, characterized in that: Along the second direction, the medium inlet and the corresponding sub-channel are arranged correspondingly.

12. The muffler device according to claim 10, characterized in that: The shell is a split part.

13. A vehicle, characterized in that: Comprising a sound-absorbing device according to any one of claims 1 to 12.

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