Silencer and vehicle with same
By integrating broadband and Helmholtz silencing structures, the problem of large space occupation and high cost caused by the combined use of broadband and Helmholtz silencing structures is solved. It achieves effective silencing of mid-to-high frequency and low-frequency noise, and reduces the space requirements and production costs of the silencing device.
Patent Information
- Application Number
- CN202423317721.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In the prior art, the combined use of a broadband muffler and a Helmholtz muffler results in problems of large space occupation and high production costs.
A muffler is designed that integrates a broadband muffler structure and a Helmholtz muffler structure. Through the combination of airflow channels, muffler holes, sub-cavities and connecting pipes, it can effectively muffle medium-high-frequency and low-frequency noise, reducing space occupation and production costs.
It achieves good noise reduction for mid-to-high frequency and low-frequency noise, reduces the space requirement of the muffler in the engine compartment, and lowers production costs.
Smart Images
Figure CN223469312U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of vehicles, in particular to a muffler and a vehicle with the same. BACKGROUND
[0002] In the whole vehicle noise, the intake noise is one of the main noises, with the continuous improvement of the customer's requirement for the whole vehicle NVH performance, how to reduce the intake noise becomes the problem that each vehicle manufacturer pays special attention to.
[0003] In the related art, in order to reduce the intake noise, some vehicles are provided with a wideband muffler with multiple cavities on the intake pipeline of the engine, the wideband muffler has good noise reduction effect on the medium and high frequency noise, but the noise reduction effect on the low frequency noise is poor, therefore, some vehicles additionally increase a Helmholtz muffler on the intake pipeline, so as to improve the noise reduction effect of the low frequency noise.
[0004] However, the joint use of the wideband muffler and the Helmholtz muffler also brings the problems of occupying a larger space and being difficult to arrange in the engine compartment, and also causes the increase of the production cost. CONTENT OF THE INVENTION
[0005] The present application provides a muffler and a vehicle with the same, which aims to obtain good noise reduction effect while reducing the occupation of space and saving the production cost.
[0006] The specific technical solutions are as follows:
[0007] In a first aspect, the embodiments of the present application provide a muffler, which comprises a shell, the shell is provided with an air inlet and an air outlet, the inside of the shell is provided with an airflow channel, a first noise reduction cavity and a second noise reduction cavity, one end of the airflow channel is connected with the air inlet, and the other end is connected with the air outlet, the first noise reduction cavity is arranged around the airflow channel, and the second noise reduction cavity is arranged around the first noise reduction cavity; the first noise reduction cavity comprises a plurality of sub-cavities, the side wall of the airflow channel is provided with a plurality of noise reduction holes in communication with each of the sub-cavities; the inside of the shell is further provided with a connecting pipe, and the airflow channel is in communication with the second noise reduction cavity through the connecting pipe.
[0008] The muffler in the embodiments of the present application can be used for muffling the intake noise of a vehicle, wherein the muffler can be arranged on the intake pipeline of the vehicle. The airflow can enter the airflow passage through the intake port, and the airflow is subjected to muffling treatment by the broadband muffling structure composed of the airflow passage, the muffling holes and the sub-cavities during the process of passing through the airflow passage, so as to filter out the medium-high frequency noise, and the airflow is also subjected to muffling treatment by the Helmholtz muffling structure composed of the intake passage, the connecting pipe and the second muffling cavity, mainly filtering out the low frequency noise. The airflow subjected to the muffling treatment is discharged from the muffler through the exhaust port. The muffler in the embodiments of the present application integrates the functions of the broadband muffling structure and the Helmholtz muffling structure, and has good muffling effect on the medium-high frequency noise and the low frequency noise, so that the overall muffling effect of the muffler can be improved. In addition, the muffler in the embodiments of the present application integrates the functions of the broadband muffling structure and the Helmholtz muffling structure, which makes it unnecessary to arrange multiple mufflers on the vehicle, so that the space occupation can be reduced, the muffler can be easily arranged in the engine compartment, and the production cost of the vehicle can be saved compared with the case of arranging multiple mufflers.
[0009] In some embodiments of the present application, a plurality of the sub-cavities are arranged along the length direction of the airflow passage, and a plurality of the muffling holes are arranged between the airflow passage and any of the sub-cavities; wherein the volumes of at least two of the sub-cavities are not equal.
[0010] The plurality of sub-cavities are arranged along the length direction of the airflow passage, so that the airflow passage is communicated with each of the sub-cavities through the muffling holes, and each of the sub-cavities is distributed compactly, so that the space utilization can be improved. In addition, the volumes of at least two of the sub-cavities are not equal, so that the first muffling cavity can be used for muffling at least two kinds of noise.
[0011] In some embodiments of the present application, the first muffling cavity includes three sub-cavities, the three sub-cavities are respectively a first sub-cavity, a second sub-cavity and a third sub-cavity, the volume of the first sub-cavity is V1, the volume of the second sub-cavity is V2, and the volume of the third sub-cavity is V3, wherein V1≠V2≠V3.
[0012] The first muffling cavity includes three sub-cavities, and the volumes of any two of the three sub-cavities are not equal. In this way, the first sub-cavity, the second sub-cavity and the third sub-cavity can correspond to three different noise frequencies, which can meet the muffling requirements of the medium-high frequency noise in most cases. In addition, arranging three sub-cavities will not cause the length of the muffler to be too long, so as to reduce the space requirement of the muffler during installation, and reduce the installation difficulty of the muffler.
[0013] In some embodiments of the present application, the sound-absorbing material is arranged in one of the sub-cavities.
[0014] The sub-cavity filled with the sound-absorbing material constitutes a resistive sound-absorbing structure, which is arranged such that the sound absorber in the embodiment of the application also integrates the function of the resistive sound-absorbing structure, and the resistive sound-absorbing structure has a better sound-absorbing effect on high-frequency noise, which is conducive to further improving the sound-absorbing effect of the sound absorber.
[0015] In some embodiments of the application, the side wall of the second sound-absorbing cavity is provided with a through hole, which is communicated with the connecting pipe; and the sound absorber further comprises a flow guide plate, which surrounds a flow guiding section at the through hole.
[0016] The embodiment obtains more control means for achieving a specific frequency target by configuring the flow guiding section, so that there is a more flexible design space when designing the parameters of each part.
[0017] In some embodiments of the application, the flow guide plate is a U-shaped plate, which is connected with the side wall of the second sound-absorbing cavity close to one side of the first sound-absorbing chamber.
[0018] The U-shaped plate can form a semi-enclosed structure for the through hole, and when the airflow in the connecting pipe enters the second sound-absorbing cavity through the through hole, the airflow will flow to the opening direction of the U-shaped plate under the guiding action of the U-shaped plate. Thus, the flow guide plate plays a role in guiding the airflow.
[0019] In some embodiments of the application, a sealing element is arranged between the flow guide plate and the inner wall of the shell.
[0020] By arranging a sealing element between the flow guide plate and the inner wall of the shell, the flow guide plate and the inner wall of the shell have good sealing performance, so that a better effect of guiding the airflow can be obtained.
[0021] In some embodiments of the application, the length of the flow guiding section is 10mm-80mm, the length of the connecting pipe is 10mm-80mm, the diameter of the connecting pipe is 15mm-35mm, and the volume of the second sound-absorbing cavity is 0.2L-0.8L.
[0022] Under the above conditions, the Helmholtz sound-absorbing structure has a better sound-absorbing effect in the low-frequency range of 50Hz-500Hz.
[0023] In some embodiments of the application, the sound absorber further comprises an air pipe, which is located in the interior of the shell and connected with the shell, and the inner cavity of the air pipe forms the airflow passage.
[0024] The airflow passage for the airflow to pass through can be configured by arranging the air pipe in the interior of the shell, so that the airflow can enter the first sound-absorbing cavity and the second sound-absorbing cavity for sound-absorbing treatment during the process of passing through the airflow passage.
[0025] In some embodiments of the present application, the muffler further comprises a partition plate, which is located inside the shell and connected with the shell, the partition plate is arranged around the air pipe, the partition plate, the air pipe and the shell jointly define the first muffling cavity, and the partition plate and the shell jointly define the second muffling cavity.
[0026] By arranging the partition plate inside the shell, the first muffling cavity and the second muffling cavity can be constructed, thereby providing a basis for constructing the broadband muffling structure and the Helmholtz muffling structure.
[0027] In a second aspect, the embodiments of the present application provide a vehicle, which comprises the muffler in any of the above embodiments.
[0028] The vehicle in the embodiments of the present application can suppress or eliminate the intake noise through the muffler. Specifically, when the muffler is working, the airflow is subjected to noise elimination treatment by the broadband muffling structure composed of the airflow channel, the noise elimination hole and the sub-cavities during the process of passing through the airflow channel, thereby filtering out the medium-high frequency noise, and the airflow is also subjected to noise elimination treatment by the Helmholtz muffling structure composed of the intake channel, the connecting pipe and the second muffling cavity, thereby mainly filtering out the low frequency noise. Thus, the muffler has good noise elimination effect on the medium-high frequency noise and the low frequency noise, so that the overall noise elimination effect of the muffler can be improved. In addition, the muffler in the embodiments of the present application integrates the functions of the broadband muffling structure and the Helmholtz muffling structure, which makes it unnecessary to arrange multiple mufflers in the vehicle, so that the space occupation can be reduced, the muffler can be easily arranged in the engine compartment, and compared with the case of arranging multiple mufflers, the production cost of the vehicle can be saved. BRIEF DESCRIPTION OF DRAWINGS
[0029] Figure 1 The overall structure schematic diagram of the muffler provided by an embodiment of the present application is shown in the figure;
[0030] Figure 2 The front view schematic diagram of the muffler provided by an embodiment of the present application is shown in the figure;
[0031] Figure 3 The schematic diagram of the section A-A is shown in the figure; Figure 2 The schematic diagram of the section A-A is shown in the figure;
[0032] Figure 4 The schematic diagram of the internal structure of the muffler provided by an embodiment of the present application is shown in the figure;
[0033] Figure 5 The simulation diagram of the noise loss test of the muffler provided by the embodiments of the present application is shown in the figure.
[0034] The reference signs in the drawings are explained as follows:
[0035] 10. Muffler
[0036] 100. Housing; 101. Inlet; 102. Outlet; 103. Airflow passage; 104. First muffling cavity; 105. Second muffling cavity; 1051. Through hole; 106. Muffling hole; 107. Sub-cavity; 107a. First sub-cavity; 107b. Second sub-cavity; 107c. Third sub-cavity
[0037] 200. Connecting pipe
[0038] 300. Deflector; 301. Airflow guiding section
[0039] 400. Vent pipe
[0040] 500. Partition DETAILED DESCRIPTION
[0041] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.
[0042] In the description of the present application, it should be understood that if the orientation or position relationship indicated by the terms "upper", "lower", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, it is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the position relationship in the drawings are only used for exemplary description, and cannot be understood as a limitation of the present patent, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0043] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as implying or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise explicitly specified.
[0044] In the description of the present application, unless specifically defined and limited otherwise, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0045] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.
[0046] As described in the background section, in order to reduce the intake noise, some vehicles in the related art are provided with a broadband muffler with multiple cavities on the intake pipe of the engine. The broadband muffler has good noise reduction effect on medium and high frequency noise, but poor noise reduction effect on low frequency noise. Therefore, some vehicles also add a Helmholtz muffler on the intake pipe to improve the noise reduction effect of low frequency noise.
[0047] However, the combined use of the broadband muffler and the Helmholtz muffler also has the problems of occupying a larger space, being difficult to arrange in the engine compartment, and increasing the production cost.
[0048] Based on the above situation, the first aspect of the embodiments of the present application proposes a muffler, which aims to obtain good noise reduction effect while reducing the occupation of space and saving the production cost of the vehicle.
[0049] Figure 1 The overall structure diagram of the muffler provided by an embodiment of the present application is shown in the figure, Figure 2 The front view schematic diagram of the muffler provided by an embodiment of the present application is shown in the figure, Figure 3 For Figure 2 The schematic diagram of the A-A section.
[0050] As Figures 1 to 3As shown, the muffler 10 proposed in the embodiments of the present application comprises a shell 100, the shell 100 is provided with an air inlet 101 and an air outlet 102, the shell 100 is internally provided with an airflow passage 103, a first muffling cavity 104 and a second muffling cavity 105, one end of the airflow passage 103 is connected to the air inlet 101, the other end of the airflow passage 103 is connected to the air outlet 102, the first muffling cavity 104 is arranged around the airflow passage 103, and the second muffling cavity 105 is arranged around the first muffling cavity 104. Wherein, the first muffling cavity 104 comprises a plurality of sub-cavities 107, the sidewall of the airflow passage 103 is provided with a plurality of muffling holes 106 which are in communication with the sub-cavities 107, and the shell 100 is internally further provided with a connecting pipe 200, the airflow passage 103 is in communication with the second muffling cavity 105 through the connecting pipe 200.
[0051] In the muffler 10 in the embodiments of the present application, the first muffling cavity 104 comprises a plurality of sub-cavities 107, the airflow passage 103 is in communication with each sub-cavity 107 through a plurality of muffling holes 106 arranged on the sidewall thereof, and such arrangement makes the airflow passage 103, the muffling holes 106 and each sub-cavity 107 of the first muffling cavity 104 jointly constitute a broadband muffling structure.
[0052] Wherein, for the broadband muffling structure, each sub-cavity 107 therein can be used to eliminate noise of a specific frequency. Taking one of the sub-cavities 107 as an example, the frequency of the noise which can be eliminated by the sub-cavity 107 is related to the volume of the sub-cavity 107, the number of the muffling holes 106 corresponding to the sub-cavity 107 and other factors, therefore, by designing the volume of the sub-cavity 107 and the number of the muffling holes 106 corresponding to the sub-cavity 107, the sub-cavity 107 can eliminate noise of a specific frequency.
[0053] In the muffler 10, the airflow passage 103 is further in communication with the second muffling cavity 105 through the connecting pipe 200, and such arrangement makes the airflow passage 103, the connecting pipe 200 and the second muffling cavity 105 jointly constitute a Helmholtz muffling structure. For the Helmholtz muffling structure, by setting the volume of the second muffling cavity 105, the pipe diameter and length of the connecting pipe 200 and other factors, the Helmholtz muffling structure can be adapted to eliminate noise of a specific frequency.
[0054] The muffler 10 in the embodiments of the present application can be used for muffling the intake noise of a vehicle, wherein the muffler 10 can be arranged on the intake pipeline of the vehicle. The airflow can enter the airflow passage through the intake port 101, and the airflow is subjected to muffling treatment by the broadband muffling structure composed of the airflow passage 103, the muffling holes 106 and the sub-cavities 107 during the process of passing through the airflow passage 103, so as to filter out the medium-high frequency noise, and the airflow is also subjected to muffling treatment by the Helmholtz muffling structure composed of the intake passage, the connecting pipe 200 and the second muffling cavity 105, mainly filtering out the low frequency noise. The airflow after the muffling treatment is discharged from the muffler 10 through the exhaust port 102. The muffler 10 in the embodiments of the present application integrates the functions of the broadband muffling structure and the Helmholtz muffling structure, and has good muffling effect on the medium-high frequency noise and the low frequency noise, so that the overall muffling effect of the muffler 10 can be improved. In addition, the muffler 10 in the embodiments of the present application integrates the functions of the broadband muffling structure and the Helmholtz muffling structure, which makes it unnecessary for the vehicle to arrange multiple mufflers 10, so that it is beneficial to reduce the space occupation, so that the muffler 10 can be arranged in the engine compartment more easily, and at the same time, compared with the case of arranging multiple mufflers 10, the use of the muffler 10 in the embodiments of the present application is also beneficial to save the production cost of the vehicle.
[0055] As shown in Figure 3 some embodiments, the multiple sub-cavities 107 are arranged along the length direction of the airflow passage 103, and multiple muffling holes 106 are arranged between the airflow passage 103 and any sub-cavity 107, wherein the volumes of at least two sub-cavities 107 are not equal.
[0056] The multiple sub-cavities 107 are arranged along the length direction of the airflow passage 103, so that the airflow passage 103 is communicated with each sub-cavity 107 through the muffling holes 106, and it is also beneficial to make the distribution of each sub-cavity 107 more compact, so as to improve the space utilization. In addition, the volumes of at least two sub-cavities 107 are not equal, which makes the first muffling cavity 104 at least used for muffling two frequency noises.
[0057] Further, the volumes of any two sub-cavities 107 in the multiple sub-cavities 107 can also be not equal, so that each sub-cavity 107 can be used for muffling one frequency noise, so that the first muffling cavity 104 covers more noise frequencies.
[0058] As shown in Figure 3As shown, in one of the embodiments, the first muffling cavity 104 includes three sub-cavities 107, which are respectively a first sub-cavity 107a, a second sub-cavity 107b and a third sub-cavity 107c, the volume of the first sub-cavity 107a is V1, the volume of the second sub-cavity 107b is V2, and the volume of the third sub-cavity 107c is V3, wherein V1≠V2≠V3.
[0059] In the present embodiment, the first muffling cavity 104 includes three sub-cavities 107, and the volumes of any two of the three sub-cavities 107 are not equal. In this way, the first sub-cavity 107a, the second sub-cavity 107b and the third sub-cavity 107c can correspond to three different noise frequencies, which can generally meet the noise muffling requirements of mid-high frequency noise in most cases. In addition, the provision of three sub-cavities 107 will not cause the length of the muffler 10 to be too long, thereby facilitating the reduction of the space requirement of the muffler 10 during installation, so as to reduce the installation difficulty of the muffler 10.
[0060] In some embodiments, one of the sub-cavities 107 is provided with sound-absorbing material (not shown in the figure). Exemplarily, the sound-absorbing material can be sound-absorbing cotton or glass fiber, etc.
[0061] The sub-cavity 107 filled with sound-absorbing material constitutes a resistive muffling structure. When the sound wave enters the sub-cavity 107 filled with sound-absorbing material, the vibration of the air in the pores of the sound-absorbing material and the fine fibers will be caused, and due to the friction and viscous resistance, the sound energy is converted into heat energy and is absorbed, thereby playing a muffling effect.
[0062] In this way, the muffler 10 in the present embodiment also integrates the function of the resistive muffling structure, and the resistive muffling structure has a good muffling effect on high frequency noise, which is conducive to further improving the muffling effect of the muffler 10.
[0063] As shown in Figure 3 , Figure 4 In some embodiments, the side wall of the second muffling cavity 105 is provided with a through hole 1051, the through hole 1051 is communicated with the connecting pipe 200, and the muffler 10 further includes a flow guide plate 300, the flow guide plate 300 surrounds a flow guiding section 301 at the through hole 1051.
[0064] The airflow in the airflow passage 103 can enter the second muffling cavity 105 in sequence through the connecting pipe 200 and the airflow guiding section 301. In the embodiment, the airflow guiding section 301 having a guiding effect on the airflow is configured by the flow guide plate 300, which makes the Helmholtz muffling structure formed by the airflow passage 103, the connecting pipe 200, the airflow guiding section 301 and the second muffling cavity 105. The length of the airflow guiding section 301 also affects the noise frequency applicable to the Helmholtz muffling structure. That is, by adjusting the pipe diameter and length of the connecting pipe 200, the length of the airflow guiding section 301, the volume of the second muffling cavity 105 and other factors, the noise frequency applicable to the Helmholtz muffling structure can be changed. In the embodiment, by configuring the airflow guiding section 301, more control means for achieving a specific frequency target is obtained, so that the design space is more flexible when designing the parameters of each part.
[0065] As shown in Figure 3 , Figure 4 In one of the embodiments, the flow guide plate 300 is a U-shaped plate, and the flow guide plate 300 is connected to the side wall of the second muffling cavity 105 close to the first muffling chamber 104.
[0066] For example, the flow guide plate 300 can be connected to the side wall of the second muffling cavity 105 close to the first muffling chamber 104 by welding, so that the flow guide plate 300 and the side wall have good sealing property, thereby obtaining a better effect of guiding the airflow.
[0067] The U-shaped plate can form a half-enclosed structure to the through hole 1051. When the airflow in the connecting pipe 200 enters the second muffling cavity 105 through the through hole 1051, the airflow will flow to the opening direction of the U-shaped plate under the guiding action of the U-shaped plate. Thus, the flow guide plate 300 plays a role in guiding the airflow.
[0068] In one of the embodiments, a sealing member (not shown in the figure) is arranged between the flow guide plate 300 and the inner wall of the shell 100. For example, the sealing member is a sealing strip.
[0069] By arranging the sealing member between the flow guide plate 300 and the inner wall of the shell 100, the flow guide plate 300 and the inner wall of the shell 100 have good sealing property, thereby obtaining a better effect of guiding the airflow.
[0070] In some embodiments, the length of the airflow guiding section 301 is 10mm-80mm, the length of the connecting pipe 20 is 10mm-80mm, the pipe diameter of the connecting pipe 20 is 15mm-35mm, and the volume of the second muffling cavity 105 is 0.2L-0.8L.
[0071] Through tests, the Helmholtz muffler structure has good muffling effect in the low frequency range of 50Hz-500Hz under the above conditions.
[0072] The simulation results obtained based on the noise transmission test of the muffler 10 in the present application are shown in FIG. 2. Figure 5 As shown in the figure, the part framed by the black box line is the transmission loss value in the noise transmission process. It can be known from the results that the muffler 10 in the present application has a noise transmission loss elimination effect of not less than 15dB in the noise frequency range of 50Hz-500Hz, and a noise transmission loss elimination effect of not less than 20dB in the medium-high frequency range of 1500Hz-3000Hz. Thus, the muffler has good muffling effect in the low frequency range of 50Hz-500Hz and the medium-high frequency range of 1500Hz-3000Hz.
[0073] As shown in FIG. 3, Figure 3 Figure 4 In some embodiments, the muffler 10 further comprises a vent pipe 400, which is located in the interior of the shell 100 and connected with the shell 100, and the inner cavity of the vent pipe 400 forms the airflow passage 103.
[0074] Exemplarily, the vent pipe 400 is connected with the shell 100 by welding, so that the connection part of the vent pipe 400 with the shell 100 has good sealing property.
[0075] By arranging the vent pipe 400 in the interior of the shell 100, the airflow passage 103 for airflow passing through can be constructed, and thus the airflow can enter the first muffling cavity 104 and the second muffling cavity 105 for muffling treatment in the process of passing through the airflow passage 103.
[0076] As shown in FIG. 4, Figure 3 Figure 4 In some embodiments, the muffler 10 further comprises a partition plate 500, which is located in the interior of the shell 100 and connected with the shell 100, and the partition plate 500 is arranged around the vent pipe 400, the partition plate 500, the vent pipe 400 and the shell 100 jointly define the first muffling cavity 104, and the partition plate 500 and the shell 100 jointly define the second muffling cavity 105.
[0077] Exemplarily, the partition plate 500 is connected with the shell 100 by welding, so that the connection part of the partition plate 500 with the shell 100 has good sealing property.
[0078] By arranging the partition plate 500 in the interior of the shell 100, the first muffling cavity 104 and the second muffling cavity 105 can be constructed, thereby providing a basis for construction of the wideband muffling structure and the Helmholtz muffling structure.
[0079] The embodiment of the first aspect of the present application provides a vehicle comprising the muffler 10 in any of the above embodiments.
[0080] The vehicle in the embodiment of the present application can suppress or eliminate the intake noise through the muffler 10. Specifically, when the muffler 10 is working, the airflow is subjected to noise elimination treatment by the broadband noise elimination structure composed of the airflow passage 103, the noise elimination hole 106 and the sub-cavities 107 during the process of passing through the airflow passage 103, so that the medium and high frequency noise is filtered out. The airflow is also subjected to noise elimination treatment by the Helmholtz noise elimination structure composed of the intake passage, the connecting pipe 200 and the second noise elimination cavity 105, mainly filtering out the low frequency noise. Thus, the muffler 10 has good noise elimination effect on the medium and high frequency noise and the low frequency noise, so that the overall noise elimination effect of the muffler 10 can be improved. In addition, the muffler 10 in the embodiment of the present application integrates the functions of the broadband noise elimination structure and the Helmholtz noise elimination structure, so that the vehicle does not need to be provided with multiple mufflers 10, which is conducive to reducing the occupation of space, so that the muffler 10 can be easily arranged in the engine compartment. Meanwhile, compared with the case of providing multiple mufflers 10, the use of the muffler 10 in the embodiment of the present application is also conducive to saving the production cost of the vehicle.
[0081] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A muffler characterized by comprising: The muffler comprises a shell provided with an air inlet and an air outlet, an airflow channel, a first sound-absorbing cavity and a second sound-absorbing cavity are arranged in the shell, one end of the airflow channel is connected to the air inlet, and the other end is connected to the air outlet, the first sound-absorbing cavity is arranged around the airflow channel, and the second sound-absorbing cavity is arranged around the first sound-absorbing cavity; The first sound-absorbing cavity comprises a plurality of sub-cavities, and the sidewall of the airflow channel is provided with a plurality of sound-absorbing holes in communication with the sub-cavities; The shell is further provided with a connecting pipe, and the airflow channel is in communication with the second sound-absorbing cavity through the connecting pipe.
2. The muffler of claim 1, wherein A plurality of sub-cavities are arranged along the length direction of the airflow channel, and a plurality of sound-absorbing holes are arranged between the airflow channel and any sub-cavity; At least two of the sub-cavities have different volumes.
3. The muffler of claim 2, wherein The first sound-absorbing cavity comprises three sub-cavities, which are a first sub-cavity, a second sub-cavity and a third sub-cavity, respectively. The volume of the first sub-cavity is V1, the volume of the second sub-cavity is V2, and the volume of the third sub-cavity is V3, wherein V1≠V2≠V3.
4. The muffler of claim 2, wherein One of the sub-cavities is provided with sound-absorbing material.
5. The muffler of claim 1, wherein The sidewall of the second sound-absorbing cavity is provided with a through hole, and the through hole is in communication with the connecting pipe; The muffler further comprises a flow guide plate, and the flow guide plate surrounds an airflow guiding section at the through hole.
6. The muffler of claim 5, wherein The flow guide plate is a U-shaped plate, and the flow guide plate is connected to the sidewall of the second sound-absorbing cavity close to the first sound-absorbing cavity.
7. The muffler of claim 6 wherein, A sealing element is arranged between the flow guide plate and the inner wall of the shell.
8. The muffler of claim 5 wherein, The length of the airflow guiding section is 10mm-80mm, the length of the connecting pipe is 10mm-80mm, the diameter of the connecting pipe is 15mm-35mm, and the volume of the second sound-absorbing cavity is 0.2L-0.8L.
9. The muffler of claim 1, wherein The muffler further comprises a ventilation pipe and a partition plate, the ventilation pipe is located in the shell and connected to the shell, and the inner cavity of the ventilation pipe forms the airflow channel; The partition plate is located in the shell and connected to the shell, the partition plate is arranged around the ventilation pipe, and the partition plate, the ventilation pipe and the shell jointly define the first sound-absorbing cavity, and the partition plate and the shell jointly define the second sound-absorbing cavity.
10. A vehicle comprising the muffler of any one of claims 1 to 9.