A muffler and airflow duct

Abstract

The utility model provides a kind of muffler and airflow pipeline, wherein the first pipe and the second pipe of the muffler are respectively arranged in the composite pipe, so that the entire muffler can be connected in the airflow pipeline, so that the airflow can flow through the inside of the composite pipe;The composite pipe includes at least one sound attenuation structure and at least one drying structure, compared with the sound attenuation module and the drying module equipped independently, the composite pipe only needs a set of first pipe and second pipe, and the structure is more compact, and the manufacturing cost is lower, when the gas is sucked through the composite pipe, it is dried through at least one drying structure, when the gas is discharged through the composite pipe, it is noise-reduced through at least one sound attenuation structure, so that the utility model realizes the functions of drying gas and reducing noise under the premise of compact structure.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction technology, specifically to a silencer and airflow duct. Background Technology

[0002] With the development of electrification and intelligence, various electric gas control modules are being used more and more widely in various equipment, such as gas control modules for air braking systems, gas control modules for central tire inflation / deflation systems in special vehicles, and gas control modules for air suspension. These airflow pipelines involving electric gas control modules are generally shared by the intake and exhaust pipelines. The gas control module is typically a device that converts the mechanical energy of the prime mover (usually an electric motor) into gas pressure energy. During intake, due to the special functional requirements of the gas control module, it needs to draw in dry air; therefore, a separate drying module is required on the airflow pipeline. During exhaust, air is also discharged from the airflow pipeline. At this time, the aerodynamic noise generated by the gas control module during operation will be very noticeable, especially low-to-mid-frequency noise; therefore, a separate muffler module is required on the airflow pipeline. When both a drying module and a muffler module are equipped in the airflow pipeline, the manufacturing cost of the entire airflow pipeline becomes higher and it occupies more space. Utility Model Content

[0003] The problem to be solved by this utility model is to provide a muffler with a compact structure and low manufacturing cost, as well as an airflow duct with such muffler.

[0004] The technical solution adopted by this utility model to solve the above problems is: a silencer, comprising: The first tube; One second tube; and A composite tube is disposed between a first tube and a second tube; the composite tube includes at least one silencing structure and at least one drying structure; noise is reduced after airflow passes through the at least one silencing structure; the drying structure is disposed in the at least one silencing structure, and the airflow is dried by the at least one drying structure.

[0005] In actual use, the first and second pipes are respectively installed in the composite pipe so that the entire silencer can be connected to the airflow duct, allowing airflow to pass through the interior of the composite pipe. The composite pipe includes at least one silencing structure and at least one drying structure. Compared with independently equipped silencing and drying modules, the composite pipe only requires one set of first and second pipes, and the structure is more compact and the manufacturing cost is lower. When gas is drawn into the composite pipe, it is dried by at least one drying structure. When gas is discharged through the composite pipe, it is noise-reduced by at least one silencing structure. Thus, this utility model achieves the functions of drying gas and reducing noise under the premise of compact structure.

[0006] The present invention provides a muffler, wherein the muffler structure includes at least one of a first muffler part and a second muffler part.

[0007] The present invention provides a silencer, wherein the first silencer part includes a flow-dividing cavity, and an inner tube and an outer tube connected to the flow-dividing cavity; the airflow from the first tube or the second tube enters the flow-dividing cavity and is diverted to the inner tube and the outer tube, and the airflow in the outer tube then flows back into the inner tube, so as to reduce the vibration amplitude of airflow noise.

[0008] The present invention provides a muffler, wherein the second muffler part includes an expansion tube; the expansion tube is configured to have its two ends connected to the first tube and the second tube respectively, or to have its two ends connected to the inner tube and one of the first tube and the second tube respectively.

[0009] The present invention provides a silencer, wherein the drying structure includes at least one of a first porous drying plate and a second porous drying plate.

[0010] In a silencer according to the present invention, at least one first porous drying plate is disposed in the expansion tube; and at least one second porous drying plate is disposed in the inner tube.

[0011] An airflow duct, comprising: One gas storage tank; A gas control module, wherein the gas control module is connected to the gas storage tank; and A muffler, the muffler comprising: The first tube; One second tube; and A composite tube is disposed between a first tube and a second tube; the composite tube includes at least one silencing structure and at least one drying structure; noise is reduced after airflow passes through the at least one silencing structure; the drying structure is disposed in the at least one silencing structure, and the airflow is dried by the at least one drying structure. The silencer is configured such that one end is connected to the gas control module and the other end is connected to the atmospheric environment. Attached Figure Description

[0012] Figure 1 This is a perspective view of a muffler according to a preferred embodiment of the present utility model; Figure 2 This is a side-view cross-sectional schematic diagram of a muffler according to a preferred embodiment of the present invention; Figure 3 This is a cross-sectional view of a muffler according to a preferred embodiment of the present invention from another side. Figure 4This is a schematic diagram of the airflow direction of a muffler according to a preferred embodiment of the present invention; Figure 5 This is a cross-sectional schematic diagram of a muffler according to a preferred embodiment of the present invention; Figure 6 This is a cross-sectional schematic diagram of a muffler according to a preferred embodiment of the present invention; Figure 7 This is a schematic diagram of the connection of an airflow duct according to a preferred embodiment of the present invention; In the picture: First tube 1; Second tube 2; Composite tube 3; silencing structure 31, drying structure 32; first silencing part 311, second silencing part 312; first porous drying plate 321, second porous drying plate 322; flow divider 3111, inner tube 3112, outer tube 3113; expansion tube 3121; Gas control module 4; Gas storage tank 5. Detailed Implementation

[0013] Before describing any embodiment of this invention in detail, it should be understood that the invention is not limited in its application to the details of the construction and arrangement of the components set forth in the following description or illustrated in the following figures. The invention is capable of other embodiments and can be practiced or carried out in various ways. Furthermore, it should be understood that the wording and terminology used herein are for descriptive purposes and should not be considered limiting. The use of “comprising” or “having” and variations thereof herein is intended to cover the items set forth below and their equivalents, as well as any additional items. Unless otherwise specified or limited, the terms “installation,” “connection,” “support,” and “linkage,” and variations thereof are used broadly and cover both direct and indirect installation, connection, support, and linking. Moreover, “connection” and “linkage” are not limited to physical or mechanical connections or links.

[0014] Furthermore, firstly, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation on this utility model. Secondly, the term "a" should be understood as "at least one" or "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be construed as a limitation on the quantity.

[0015] Those skilled in the art should understand that the embodiments of the present invention described below and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The function and structural principles of the present invention are shown and described in the following embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

[0016] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0017] Please see Figure 1-7 The silencer shown includes a first tube 1, a second tube 2, and a composite tube 3; wherein the composite tube 3 is disposed between the first tube 1 and the second tube 2; the composite tube 3 includes at least one silencing structure 31 and at least one drying structure 32; the noise is reduced after the airflow passes through the at least one silencing structure 31; the drying structure 32 is disposed in the at least one silencing structure 31, and the airflow is dried by the at least one drying structure 32.

[0018] In actual use, the first pipe 1 and the second pipe 2 are respectively set in the composite pipe 3 so that the entire silencer can be connected to the airflow duct, allowing the airflow to flow through the interior of the composite pipe 3. The composite pipe 3 includes at least one silencing structure 31 and at least one drying structure 32. Compared with independently equipped silencing and drying modules, the composite pipe 3 only requires one set of the first pipe 1 and the second pipe 2, and the structure is more compact and the manufacturing cost is lower. When the gas is drawn into the composite pipe 3, it is dried by at least one drying structure 32. When the gas is discharged from the composite pipe 3, it is noise-reduced by at least one silencing structure 31. Thus, this utility model achieves the functions of drying gas and reducing noise under the premise of compact structure.

[0019] Please continue reading. Figure 2-5 The noise reduction structure 31 includes at least one of a first noise reduction part 311 and a second noise reduction part 312.

[0020] It is understandable that the noise reduction structure 31 inside the composite pipe 3 can have multiple modes. Based on different working conditions, the noise reduction structure 31 can be freely combined from the first noise reduction part 311 and the second noise reduction part 312 to meet the noise reduction requirements or the requirements for a compact structure.

[0021] Please continue reading. Figure 2-4The first silencing part 311 includes a diversion cavity 3111, an inner pipe 3112 and an outer pipe 3113 connected to the diversion cavity 3111; the airflow from the first pipe 1 or the second pipe 2 enters the diversion cavity 3111 and is diverted to the inner pipe 3112 and the outer pipe 3113, and the airflow in the outer pipe 3113 then flows back into the inner pipe 3112, so as to reduce the vibration amplitude of airflow noise.

[0022] Specifically, such as Figure 4 As shown, the airflow enters from the first pipe 1 or the second pipe 2, and after traveling to the diversion chamber 3111, the red part of the airflow directly enters the inner pipe 3112, while the blue part of the airflow is diverted to the outer pipe 3113. After circulating through the outer pipe 3113, it re-enters the inner pipe 3112. At this time, the two airflows overlap, reducing the vibration amplitude of the noise, thereby reducing the noise.

[0023] Please continue reading. Figure 2-4 The second silencing part 312 includes an expansion tube 3121; the expansion tube 3121 is configured to be connected at both ends to the first tube 1 and the second tube 2 respectively, or to be configured to be connected at both ends to the inner tube 3112 and one of the first tube 1 and the second tube 2 respectively.

[0024] Specifically, since the second silencing part 312 includes an expansion tube 3121, and the expansion tube 3121 is configured to have a cross-sectional area larger than that of the first tube 1, the second tube 2 and the inner tube 3112, when sound waves enter the large-area tube from the small-area tube, the acoustic impedance changes due to the change in cross-sectional area, thereby reducing noise.

[0025] Therefore, the noise reduction structure 31 may include only at least one first noise reduction part 311 to obtain a better noise reduction effect, only at least one second noise reduction part 312 to solve the radial dimension problem, or it may include a combination structure of the first noise reduction part 311 and the second noise reduction part 312 to achieve a balance between noise reduction and radial dimension.

[0026] Please continue reading. Figure 2-4 The drying structure 32 includes at least one of a first porous drying sheet 321 and a second porous drying sheet 322.

[0027] It is understandable that the sound-absorbing structure 31 inside the composite tube 3 can be changed according to the working conditions, and the use of the first porous drying plate 321 and the second porous drying plate 322 of the drying structure 32 can also be adapted to cooperate with the structure of the composite tube 3.

[0028] Please continue reading. Figure 2-4At least one first porous drying sheet 321 is disposed in the expansion tube 3121; at least one second porous drying sheet 322 is disposed in the inner tube 3112.

[0029] Specifically, since the expansion tube 3121 and the inner tube 3112 are the necessary paths for airflow, they are suitable locations in the composite tube 3 for setting the drying structure 32, which can bring a better drying effect. Therefore, when the silencing structure 31 only includes at least one first silencing part 311, at least one first porous drying plate 321 can be set in at least one first silencing part 311. When the silencing structure 31 only includes at least one second silencing part 312, at least one second porous drying plate 322 can be set in at least one second silencing part 312. When the silencing structure 31 includes a combination structure of the first silencing part 311 and the second silencing part 312, the first porous drying plate 321 and / or the second porous drying plate 322 can be selectively set in either of them.

[0030] Please continue reading. Figure 6 The illustrated airflow duct includes a gas storage tank 5, a gas control module 4, and a silencer; wherein the gas control module 4 is connected to the gas storage tank 5; the silencer includes a first pipe 1, a second pipe 2, and a composite pipe 3, wherein the composite pipe 3 is disposed between the first pipe 1 and the second pipe 2; the composite pipe 3 includes at least one silencing structure 31 and at least one drying structure 32; the noise is reduced after the airflow passes through the at least one silencing structure 31; the drying structure 32 is disposed on the at least one silencing structure 31, and the airflow is dried by the at least one drying structure 32; the silencer is configured to have one end connected to the gas control module 4 and the other end connected to the atmospheric environment.

[0031] Specifically, when the gas control module 4 draws in air, air enters the gas control module 4 and the gas storage tank 5 from the atmospheric environment through the silencer. Due to the drying effect of the drying structure 32, the gas entering the gas control module 4 and the gas storage tank 5 is relatively dry, meeting the usage requirements. When the gas control module 4 exhausts air, the gas is discharged into the atmospheric environment through the silencer. Due to the noise reduction effect of the silencer structure 31, the noise of the airflow discharged into the atmospheric environment is reduced. While satisfying the aforementioned drying function and noise reduction, the entire airflow duct structure is more compact and occupies less space.

[0032] Furthermore, the gas control module 4 is preferably a device that converts the mechanical energy of the prime mover (usually an electric motor) into gas pressure energy.

[0033] The above description only illustrates the preferred embodiment of this utility model and should not be construed as limiting the scope of the claims. This utility model is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of this utility model are also within the scope of protection of this utility model.

Claims

1. A silencer, characterized in that, include: First tube (1); The second tube (2); as well as A composite pipe (3) is disposed between the first pipe (1) and the second pipe (2); the composite pipe (3) includes at least one silencing structure (31) and at least one drying structure (32); the noise is reduced after the airflow passes through the at least one silencing structure (31); the drying structure (32) is disposed on the at least one silencing structure (31) and the airflow is dried by the at least one drying structure (32).

2. The silencer according to claim 1, characterized in that: The noise reduction structure (31) includes at least one of a first noise reduction part (311) and a second noise reduction part (312).

3. The silencer according to claim 2, characterized in that: The first silencing part (311) includes a diversion cavity (3111), and an inner tube (3112) and an outer tube (3113) connected to the diversion cavity (3111). After the airflow of the first tube (1) or the second tube (2) enters the diversion cavity (3111), it is diverted to the inner tube (3112) and the outer tube (3113). The airflow in the outer tube (3113) then flows back into the inner tube (3112) in order to reduce the vibration amplitude of airflow noise.

4. The silencer according to claim 3, characterized in that: The second silencing part (312) includes an expansion tube (3121); the expansion tube (3121) is configured to be connected at both ends to the first tube (1) and the second tube (2) respectively, or to be configured to be connected at both ends to the inner tube (3112) and one of the first tube (1) and the second tube (2) respectively.

5. The silencer according to claim 4, characterized in that: The drying structure (32) includes at least one of a first porous drying sheet (321) and a second porous drying sheet (322).

6. The silencer according to claim 5, characterized in that: At least one of the first porous drying plates (321) is disposed in the expansion tube (3121); at least one of the second porous drying plates (322) is disposed in the inner tube (3112).

7. An airflow duct, characterized in that, include: One gas storage tank (5); A gas control module (4), wherein the gas control module (4) is connected to the gas storage tank (5); and The silencer according to any one of claims 1-6; The silencer is configured such that one end is connected to the gas control module (4) and the other end is connected to the atmospheric environment.

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