Impedance composite silencer

Abstract

The utility model discloses an impedance composite silencer which comprises a box body and further comprises a rotary impedance integrated structure, the rotary impedance integrated structure comprises an air inlet pipe, a plurality of expansion chambers are arranged on one side of the air inlet pipe, each expansion chamber is of a spherical shell type structure, sound absorption materials are filled in the expansion chambers, inserting ports are formed in the side edges of the expansion chambers, and the inserting ports are communicated with the air inlet pipe. A pipeline is installed between the connecting and inserting openings in a communicating mode and is of an S-shaped structure. The cooling assembly comprises a water tank installed on one side of the box body, a water inlet pipe is arranged on one side of the water tank, the water inlet pipe is filled with a cotton core, the water inlet pipe is in butt joint with the expansion chamber, and a water dripping pipe is arranged at the bottom of the expansion chamber. By means of the rotary impedance integrated structure, a traditional expansion chamber structure of a resistive silencer is arranged to be in a spherical shell shape, and the effect of even absorption is achieved; the interior of the spherical shell is directly filled with the silencing materials serving as reactive silencers, so that the silencers on unit nodes can achieve the effect of impedance and synchronous silencing at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of mufflers, in particular to an impedance composite muffler. Background Art

[0002] An impedance composite muffler is a muffler that optimally combines sound absorption and reflection. It combines the characteristics of a resistive muffler to eliminate mid- and high-frequency noise with those of a reactive muffler to eliminate low- and medium-frequency noise, resulting in a broadband muffler. To achieve excellent muffler performance across a wide frequency range, a reactive muffler effective at low and medium frequencies and a resistive muffler effective at high frequencies can be combined to create an impedance composite muffler. This muffler incorporates both sound-absorbing materials and filtering elements such as resonators, expansion chambers, and perforated screens. Due to its high sound attenuation capacity and wide frequency range, this type of muffler has become increasingly popular in recent years. Types: Based on their operating principle, they are categorized into: resistive-expansion chamber composite muffler, resistive-resonance cavity composite muffler, resistive-resonance cavity-expansion chamber composite muffler, and microperforated plate muffler. Structure: For example, the microperforated plate muffler is a muffler lined with microperforated plates. Typically made from thin plates less than 1mm thick, these are perforated with a drill bit with a diameter less than 1mm, resulting in a perforation rate of 1% to 3%. By varying the perforation rate and cavity depth for varying plate thicknesses, the muffler's spectral performance can be controlled to achieve optimal noise reduction within the desired frequency range. Features: Low resistance, capable of eliminating airflow noise across a wide frequency band. Furthermore, these mufflers are resistant to high temperatures, oil stains, and corrosion, and operate even with high levels of moisture in the airflow. Due to the small perforation diameter and smooth plate surface, this type of muffler exhibits lower pressure loss than conventional mufflers.

[0003] Chinese invention patent application number CN2753886Y discloses an impedance composite muffler for reducing oxygen machine airflow noise. The patent includes a front-stage muffler pipe and a rear-stage muffler pipe, the front ends of which are interconnected via a connecting pipe. The rear end of the front-stage muffler pipe is closed, with an air inlet at its front end. The inner cavity of the front-stage muffler pipe is filled with artificial sponge. The artificial sponge in the front section of the front-stage muffler pipe is a hollow structure with a cavity directly connected to the air inlet at its center, while the artificial sponge in the rear section of the front-stage muffler pipe is a completely filled solid structure. The front and rear ends of the rear-stage muffler pipe are both closed, with a plurality of small holes densely distributed on the pipe wall near the rear end. The inner cavity of the rear-stage muffler pipe is entirely filled with hollow artificial sponge. This utility model has a simple structure, takes up little space, and has excellent noise reduction effect.

[0004] Existing impedance composite mufflers primarily utilize a split-type structure consisting of a resistive muffler and a reactive muffler, similar to a structure with alternating elements: resistive-reactive-resistive... This split-type structure prolongs the muffler channel, resulting in low muffler efficiency per unit volume and poor performance. Furthermore, muffler materials exposed to high-temperature gases can age or even deteriorate due to excessive temperatures, necessitating direct material replacement, significantly reducing their service life. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose an impedance composite muffler.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] The impedance composite muffler includes a box body and:

[0008] The rotary impedance integrated structure includes an air intake pipe, one side of which is provided with multiple expansion chambers, each of which is a spherical shell structure and filled with sound-absorbing material. The side of the expansion chamber is provided with a socket, and pipes are installed between the sockets, and the pipes are S-shaped.

[0009] The cooling component includes a water tank installed on one side of the box body, a water inlet pipe is provided on one side of the water tank, the interior of the water inlet pipe is filled with cotton core, the water inlet pipe and the expansion chamber are connected to each other, and a drip pipe is provided at the bottom of the expansion chamber.

[0010] Further technical solutions also include:

[0011] The expansion silencer assembly includes an amplifying chamber connected to the end of the socket, one side of the amplifying chamber is connected to the amplifying chamber, the interior of the amplifying chamber is filled with silencer cotton, and the surface of the silencer cotton is provided with holes.

[0012] According to a further technical solution, the amplification chamber has a conical cavity structure.

[0013] According to a further technical solution, a water filling hole is provided on one side of the water tank.

[0014] According to a further technical solution, the air intake pipe is arranged on the outside of the box.

[0015] Compared with the prior art, the present invention provides an impedance composite muffler with the following beneficial effects:

[0016] The rotary impedance integrated structure is designed to change the traditional expansion chamber structure of the resistive muffler into a spherical shell, achieving a uniform absorption effect. In addition, the muffler material used as the reactive muffler is directly filled inside the spherical shell, allowing the muffler on each node to achieve the effect of impedance synchronous muffler, greatly improving the muffler efficiency.

[0017] By setting up a drip-type cooling component, a vertical water tank is arranged above the flow channel, and slow cooling is achieved through cotton core dripping, avoiding the problem of rapid aging and deterioration of the silencer material caused by the passage of high-temperature gas, and extending the service life of the silencer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the impedance composite muffler proposed in the utility model;

[0019] Figure 2 This is a schematic diagram of the rotary impedance integrated structure of the impedance composite muffler proposed in the present invention;

[0020] Figure 3 This is a schematic diagram of the longitudinal cross-section structure of the impedance composite muffler proposed in the present utility model;

[0021] Figure 4 This is a structural schematic diagram of the auxiliary expansion silencer component of the impedance composite silencer proposed in the utility model.

[0022] In the picture:

[0023] 1. Box body; 2. Rotary impedance integrated structure; 3. Cooling component; 4. Expansion silencer component; 5. Expansion chamber; 6. Sound-absorbing material; 7. Connector; 8. Pipe; 9. Water inlet pipe; 10. Cotton core; 11. Water tank; 12. Amplification chamber; 13. Silencing cotton; 14. Hole position; 15. Air inlet pipe; 16. Drip pipe; 17. Amplification chamber; 18. Water filling hole. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] Example 1: Reference Figure 1 - Figure 4 The impedance composite muffler includes a box body 1, which is a structure for storing the muffler, and also includes:

[0026] The rotary impedance integrated structure 2 has both integrated silencer and streamlined long-path silencer effects; the rotary impedance integrated structure 2 includes an air intake pipe 15, which is the location where noise and gas enter; a plurality of expansion chambers 5 are provided on one side of the air intake pipe 15, and the main function of the expansion chamber 5 is to simulate the effect of the existing resistive silencer and quickly reduce the energy of the sound. The expansion chamber 5 is a spherical shell structure, which has a uniform silencer effect. The interior of the expansion chamber 5 is filled with sound-absorbing material 6, which is the main material of the resistive silencer; the side of the expansion chamber 5 is provided with a connector 7, and a pipe 8 is installed between the connectors 7, and the pipe 8 is an S-shaped structure, which increases the length of the sound path per unit volume, thereby increasing the silencer effect;

[0027] Cooling assembly 3 is used to prevent thermal aging of internal materials. It includes a water tank 11 mounted on one side of the housing 1, which holds water. A water inlet pipe 9 is located on one side of the water tank 11. This pipe is filled with a cotton wick 10, which slows down water dripping. The water inlet pipe 9 interfaces with the expansion chamber 5, which has a drip pipe 16 at its bottom.

[0028] Impedance composite muffler, also includes:

[0029] The expansion muffler assembly 4 is a resistive muffler auxiliary structure with a specific structure. It includes an amplification chamber 17 connected to the end of the connector 7 to quickly reduce the energy of the sound. Amplification chamber 12 is connected to one side of amplification chamber 17, and auxiliary sound attenuation is achieved through muffler cotton 13. The interior of amplification chamber 12 is filled with muffler cotton 13, and the surface of muffler cotton 13 is provided with holes 14.

[0030] In the impedance composite muffler, the amplifying chamber 17 is a conical cavity structure, which has a uniform energy reduction effect.

[0031] The impedance composite muffler has a water filling hole 18 provided on one side of the water tank 11 , which serves as a water filling structure of the water tank 11 .

[0032] In the impedance composite muffler, the air inlet pipe 15 is arranged on the outside of the box body 1 as the part for sound and gas to enter.

[0033] Working principle:

[0034] During the actual design process, the present invention addresses the following deficiencies in the prior art: "Existing impedance composite silencers primarily utilize a split structure for the resistive and reactive silencers, similar to a structure with alternating arrangements of resistive, reactive, and resistive components. This split impedance structure prolongs the muffler channel, resulting in low muffler efficiency per unit volume and poor performance of the prior art composite muffler. Furthermore, muffler materials exposed to high-temperature gas may age or even deteriorate due to excessive temperatures. Existing technology requires direct material replacement, significantly reducing service life." The present invention specifically proposes a rotary impedance integrated component 2, a cooling component 3, and an expansion muffler component 4.

[0035] The rotary impedance integrated component 2 includes the following two innovative designs:

[0036] 1. Impedance-integrated design: The traditional expansion chamber 5 is redesigned into a spherical shell structure, which has excellent uniform sound attenuation and is used as a resistive muffler structure. The sound-absorbing material 6 filled inside the expansion chamber 5 is used to simulate a reactive muffler. The sound-absorbing material 6 is directly filled inside the expansion chamber 5, so that the muffler has both resistive and reactive sound attenuation effects per unit node, significantly improving the overall sound attenuation effect of the muffler.

[0037] 2. The streamlined pipe 8 structure greatly extends the flow path of the sound channel, thereby greatly improving the sound insulation effect, and can achieve efficient absorption of both high-frequency and low-frequency noise.

[0038] In order to avoid the problem of aging and heating of the sound-absorbing material, a water tank 11 is installed on the top of the device. The internal sound-absorbing material 6 is cooled in real time through the dripping of the cotton core 10, and it also has a certain cleaning effect. The clean water after use will be discharged from the drip pipe 16 to avoid the problem of water accumulation.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements that are inherent to such process, method, article or device. The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, shall make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, which should be covered within the scope of protection of the present invention.

Claims

1. An impedance composite muffler, comprising a housing (1), characterized in that: Also includes: A rotary impedance integrated structure (2), comprising an air intake pipe (15), a plurality of expansion chambers (5) being provided on one side of the air intake pipe (15), the expansion chambers (5) being spherical shell structures, the interior of the expansion chambers (5) being filled with sound absorbing materials (6), a connector (7) being provided on the side of the expansion chambers (5), a pipe (8) being installed in communication between the connectors (7), and the pipe (8) being an S-shaped structure; A cooling component (3) includes a water tank (11) installed on one side of a box body (1); a water inlet pipe (9) is provided on one side of the water tank (11); the interior of the water inlet pipe (9) is filled with a cotton core (10); the water inlet pipe (9) and the expansion chamber (5) are connected to each other; and a drip pipe (16) is provided at the bottom of the expansion chamber (5).

2. The impedance composite muffler according to claim 1, characterized in that: Also includes: An expansion silencer assembly (4) includes an amplification chamber (17) connected to the end of a connector (7), one side of the amplification chamber (17) is connected to an amplification chamber (12), the interior of the amplification chamber (12) is filled with silencer cotton (13), and the surface of the silencer cotton (13) is provided with holes (14).

3. The impedance composite muffler according to claim 2, characterized in that: The amplifying chamber (17) is a conical cavity structure.

4. The impedance composite muffler according to claim 1, characterized in that: A water filling hole (18) is provided on one side of the water tank (11).

5. The impedance composite muffler according to claim 1, characterized in that: The air inlet pipe (15) is arranged outside the box body (1).

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