Air outlet sound absorption and noise reduction equipment
By designing the sound-absorbing and noise reduction equipment at the exhaust outlet, the inner cylinder and silence hole of the reduced diameter structure are used to form the sound-absorbing cavity, which solves the noise problem of the existing exhaust outlet equipment and achieves effective noise absorption and reduction.
Patent Information
- Application Number
- CN202421606627.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-09
AI Technical Summary
The existing exhaust air outlet equipment lacks sound silence facilities, which leads to excessive wind speed collision with the metal wall and produces large noise, affecting residents' lives.
A sound absorption and noise reduction equipment for exhaust outlets is designed, using an outer cylinder, a connecting plate and an inner cylinder with a reduced diameter structure to form a sound silence cavity, and a sound silence hole and filler are installed on the inner cylinder to absorb noise.
Through the sudden expansion of the aperture design, the acoustic impedance is suddenly changed, ensuring smooth exhaust airflow, reducing the noise generated by collision between high-speed airflow and metal walls, and effectively reducing the sound wave intensity of a certain frequency.
Smart Images
Figure CN222865189U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of noise reduction equipment, and more specifically to an exhaust vent sound absorption and noise reduction equipment. Background Art
[0002] In commercial areas or residential areas, since the exhaust vents are equipped with high-power exhaust fans, the wind collides with the metal of the exhaust vent due to the high wind speed when being discharged from the exhaust vent, which will produce a lot of noise. However, the oil fume exhaust vents in the prior art have no silencer facilities, which seriously affects the lives of nearby residents.
[0003] Therefore, how to provide an exhaust vent sound absorption and noise reduction device with a silencing function is a problem that technical personnel in this field urgently need to solve. Utility Model Content
[0004] In view of this, the utility model provides an exhaust vent sound absorption and noise reduction device, which aims to solve the problems in the above-mentioned background technology and achieve effective absorption of the noise of the exhaust vent.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] An exhaust vent sound absorption and noise reduction device, comprising:
[0007] outer cylinder;
[0008] A connecting plate, the connecting plate is arranged at one end of the outer cylinder, and the connecting plate is annular;
[0009] The inner cylinder is arranged inside the outer cylinder, one end of the inner cylinder is connected to the inner circle of the connecting plate, and the other end of the inner cylinder is connected to the end of the outer cylinder away from the connecting plate, and the inner cylinder is a reduced diameter structure.
[0010] Furthermore, the inner diameter of the inner cylinder gradually decreases from an end of the inner cylinder away from the connecting plate toward an end of the inner cylinder close to the connecting plate.
[0011] Furthermore, the inner tube, the outer tube and the connecting plate form a silencer chamber.
[0012] Furthermore, the silencing cavity is filled with fillers.
[0013] Furthermore, a sound-absorbing hole is provided through the inner tube, and a plurality of the sound-absorbing holes are provided, and the plurality of the sound-absorbing holes penetrate the inner tube.
[0014] Through the above technical solutions, it can be known that compared with the prior art, the utility model discloses a sound-absorbing and noise-reducing device for an air outlet. By setting an inner tube and setting the inner tube as a reduced diameter structure, the aperture design from the air inlet to the air outlet of the silencer is from small to large, and the suddenly expanded aperture causes a sudden change in acoustic impedance, thereby ensuring smooth exhaust, reducing the noise generated by the collision between the high-speed airflow and the metal wall, and effectively reducing the intensity of sound waves of a certain frequency. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0016] Figure 1 A cross-sectional view of an exhaust outlet sound absorption and noise reduction device provided by the utility model;
[0017] Figure 2 This is an overall structural diagram of an exhaust vent sound absorption and noise reduction device provided by the utility model.
[0018] Among them: 1 is the outer tube; 2 is the connecting plate; 3 is the inner tube; 4 is the filler; 5 is the silencer hole. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] See also Figure 1 and 2 The utility model embodiment discloses an exhaust vent sound absorption and noise reduction device, comprising:
[0021] Outer cylinder 1; in the present embodiment, the outer cylinder 1 is cylindrical, in other embodiments, the cross-section of the outer cylinder 1 may be a polygonal or square shape or other shapes, and the material of the outer cylinder 1 is metal, such as aluminum, stainless steel or the like.
[0022] The connecting plate 2 is arranged at one end of the outer tube 1, and the connecting plate 2 is annular; in the present embodiment, the connecting plate 2 is annular, the outer diameter of the connecting plate 2 is the same as the diameter of the outer tube 1, the inner diameter of the connecting plate 2 is the same as the diameter of the inner tube 3, the connecting plate 2 is sealed and connected to the inner tube 3 and the outer tube 1 respectively, and the connecting plate 2 and the outer tube 1 are made of the same material.
[0023] The inner tube 3 is arranged inside the outer tube 1, one end of the inner tube 3 is connected to the inner circle of the connecting plate 2, and the other end of the inner tube 3 is connected to the end of the outer tube 1 away from the connecting plate 2. The inner tube 3 is a reduced diameter structure; the inner diameter of the inner tube 3 gradually decreases from the end of the inner tube 3 away from the connecting plate 2 toward the end of the inner tube 3 close to the connecting plate 2. In this embodiment, the air inlet of the exhaust sound absorption and noise reduction device is the air inlet at the end with a smaller diameter of the inner tube 3, and the end with a larger diameter of the inner tube 3 is the air outlet. The aperture design from small to large is adopted from the air inlet to the air outlet. The suddenly expanded aperture causes a sudden change in acoustic impedance, which ensures smooth exhaust, reduces the noise generated by the collision of high-speed airflow with the metal wall, and can effectively reduce the intensity of sound waves of a certain frequency.
[0024] The inner tube 3, the outer tube 1 and the connecting plate 2 form a silencer cavity; the silencer cavity is filled with a filler 4; a silencer hole 5 is provided through the inner tube 3, and a plurality of silencer holes 5 are provided, and the plurality of silencer holes 5 penetrate the inner tube 3. In this embodiment, the metal holes in the inner hole wall of the silencer device will guide the discharged wind into the filler 4, and after multiple reflections and absorptions, the purpose of sound absorption and noise reduction is achieved.
[0025] In this embodiment, an oil drain groove is provided on the inner wall of the inner tube 3. Various liquids such as oil smoke will be mixed in the exhaust process and eventually fall into the oil drain groove and flow out, thereby extending the service life of the silencing equipment and reducing costs.
[0026] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.
[0027] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. An exhaust vent sound absorption and noise reduction device, characterized in that: include: outer cylinder; A connecting plate, the connecting plate is arranged at one end of the outer cylinder, and the connecting plate is annular; The inner cylinder is arranged inside the outer cylinder, one end of the inner cylinder is connected to the inner circle of the connecting plate, and the other end of the inner cylinder is connected to the end of the outer cylinder away from the connecting plate, and the inner cylinder is a reduced diameter structure.
2. The exhaust vent sound absorption and noise reduction device according to claim 1, characterized in that: The inner diameter of the inner cylinder gradually decreases from an end of the inner cylinder away from the connecting plate toward an end of the inner cylinder close to the connecting plate.
3. The exhaust vent sound absorption and noise reduction device according to claim 1, characterized in that: The inner cylinder, the outer cylinder and the connecting plate form a silencer chamber.
4. The exhaust vent sound absorption and noise reduction device according to claim 3, characterized in that: The silencing cavity is filled with fillers.
5. The exhaust vent sound absorption and noise reduction device according to claim 1, characterized in that: The inner cylinder is provided with a sound-absorbing hole, and a plurality of the sound-absorbing holes are provided, and the plurality of the sound-absorbing holes penetrate the inner cylinder.