Simple labyrinth type silencing box

Abstract

The utility model relates to a simple labyrinth type silencing box, which comprises an outer shell, a perforated plate and a sound absorption layer, the outer shell is detachably fixed at a ventilation opening of an acoustic facility of an acoustic silencing box, and a silencing channel communicated with the outside and the ventilation opening of the acoustic facility is arranged in the outer shell. The perforated plate is installed on the inner wall of the silencing channel, and the sound absorption layer is filled in a cavity between the perforated plate and the outer shell. The silencing box is arranged at the ventilation opening of the acoustic facility, so that the acoustic environment in the acoustic facility is not influenced by external environmental noise while the ventilation of the acoustic facility is ensured. Compared with an existing ventilation silencer, the ventilation silencer has the advantages that the structure is simple and light, and the construction is convenient; special requirements on materials and a manufacturing process are avoided, and the manufacturing cost is low; the ventilation and noise reduction requirements of acoustic facilities are met; and installation and maintenance are convenient. And the silencing boxes with different specifications and sizes can meet the requirements of ventilation quantity of different acoustic facilities.

Description

Technical Field

[0001] The utility model relates to the field of acoustic technology, specifically to the fields of industry, commerce, civil use, and acoustic experimental testing, and in particular to a simple maze-type silencer box. Background Art

[0002] In the field of acoustics, in order to obtain a stable acoustic environment, it is generally necessary to isolate the acoustic environment from the external surrounding environment. In order to create a good acoustic environment, acoustic facilities such as soundproof enclosures, soundproof boxes, acoustic silent boxes, and anechoic rooms need to be made.

[0003] In existing technologies, in order to reduce the impact of the external surrounding environment on the acoustic environment, under normal circumstances, the better the airtightness of the acoustic facility, the better the acoustic effect. However, in order to meet the ventilation requirements, vents need to be opened in the facility. This will cause external noise to be transmitted into the facility through the vents, affecting the acoustic environment of the facility. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a simple maze-type silencer box, which is installed at the vent of the acoustic facility. It can ensure the ventilation of the acoustic facility while the external environmental noise has no effect on the acoustic environment inside the acoustic facility. The present invention has a simple structure, is easy to disassemble and assemble, easy to manufacture, and convenient to maintain.

[0005] The above-mentioned utility model object of the present invention is achieved through the following technical solutions:

[0006] A simple labyrinth-type silencer box comprises an outer shell, a perforated plate, and a sound-absorbing layer. The outer shell is detachably fixed to the vent of an acoustic facility of an acoustic mute box. A silencer channel connecting the outside world and the vent of the acoustic facility is provided in the outer shell. The perforated plate is mounted on the inner wall of the silencer channel. The sound-absorbing layer is filled in the cavity between the perforated plate and the outer shell.

[0007] As a further technical solution of the present invention: the sound absorbing layer is a sound absorbing material, and the sound absorbing material is selected from one or more of glass wool, polyester fiber cotton, melamine, and aluminum silicate fiber.

[0008] As a further technical solution of the present invention: fixing ears are fixedly connected to the four sides of the outer shell, and mounting holes are provided on the fixing ears.

[0009] As a further technical solution of the present invention: the muffler channel adopts a labyrinth structure.

[0010] As a further technical solution of the present invention: the outer shell is one of a steel plate, an aluminum plate, and a wooden plate.

[0011] In summary, the present invention has at least one of the following beneficial technical effects:

[0012] This utility model discloses a simple labyrinth-style silencer box. Installed in the vent of an acoustic facility, this box ensures ventilation while preventing external ambient noise from affecting the acoustic environment within the facility. Compared to existing ventilation silencers, this new box offers advantages such as a simple, lightweight structure, ease of construction, low production cost, and the ability to meet the requirements for ventilation and noise reduction in acoustic facilities. It is also easy to install and maintain. Silencers of varying sizes can be designed to meet the ventilation requirements of various acoustic facilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of the present invention.

[0014] Figure 2 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 3 This is a schematic diagram of the structure of the utility model installed on an acoustic soundproof box.

[0016] Figure 4 for Figure 3 sectional view of .

[0017] Reference numerals: 1. outer shell; 2. perforated plate; 3. sound absorbing layer; 4. sound elimination channel; 5. fixing ear. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; it is obvious that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0019] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0021] Example 1:

[0022] Reference Figure 1 , is a simple labyrinth muffler box disclosed in the present invention, comprising an outer shell 1, a perforated plate 2 and a sound absorbing layer 3. The outer shell 1 can be detachably fixed to the vent of the acoustic facility of the acoustic mute box (see Figure 4 ), refer to Figure 1 A sound-absorbing channel 4 is provided in the outer shell 1 to connect the outside world with the vent of the acoustic facility. The sound-absorbing channel 4 adopts a labyrinth structure. The perforated plate 2 is installed on the inner wall of the sound-absorbing channel 4, and the sound-absorbing layer 3 is filled in the cavity between the perforated plate 2 and the outer shell 1.

[0023] The sound absorbing layer 3 is a sound absorbing material, and the sound absorbing material is selected from one or more of glass wool, polyester fiber wool, melamine, and aluminum silicate fiber. The sound absorbing material is used to fill the cavity formed between the outer shell 1 and the perforated plate 2. It absorbs sound and also has a sound insulation effect.

[0024] Reference Figure 2 and Figure 3 The outer shell 1 is fixedly connected to the four sides of the acoustic mute box with fixing ears 5. The fixing ears 5 have mounting holes. One end of the fastening screw passes through the mounting holes and is threaded onto the acoustic mute box, thereby fixing the outer shell 1 to the outside of the acoustic mute box. The fixing ears 5 can easily fix the mute box to the acoustic equipment that needs ventilation and noise reduction. Simply tightening the screws can form a stable connection between the fixing ears 5 and the mute box.

[0025] The outer shell 1 is made of steel, aluminum, or wood, which are materials with high surface density and are easily moldable, making them suitable for processing and forming. This process creates a stable outer shell 1 with a certain sound insulation performance. The perforated plate 2 forms an internal ventilation cavity. As external noise propagates through this cavity, it is gradually absorbed by the sound-absorbing material between the outer shell 1 and the perforated plate 2 through the holes in the plate surface, thereby gradually isolating the noise.

[0026] During installation, first align the vents of the silencer box with the vents of the acoustic silencer box; use self-tapping screws to fix the silencer box to the acoustic silencer box; apply silicone around the silencer box and the acoustic silencer box.

[0027] In this embodiment, the design of the muffler box takes advantage of the propagation characteristics of sound. By adopting a labyrinthine structure, the noise is prevented from propagating in a straight line along the ventilation path. At the same time, the noise propagation path is increased within a limited space and the contact area between the sound-absorbing material and the propagating noise is increased. Without affecting the ventilation, the propagation of noise along the ventilation channel is suppressed, thereby achieving the effect of noise reduction (such as Figure 1 ).

[0028] The working principle of this utility model is as follows: This utility model discloses a simple labyrinth-style silencer box. This silencer box is installed at the vent of an acoustic facility. It can ensure ventilation of the acoustic facility while preventing external ambient noise from affecting the acoustic environment within the acoustic facility. Compared with existing ventilation silencers, this utility model has the advantages of simple structure, light weight, and easy construction; no special requirements for materials and manufacturing processes, low production cost; meets the requirements for ventilation and noise reduction of acoustic facilities; and is easy to install and maintain. Silencers of different specifications and sizes can meet the ventilation requirements of different acoustic facilities.

[0029] The embodiments of this specific implementation method are all preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. A simple labyrinth muffler box, characterized in that: The invention comprises an outer shell (1), a perforated plate (2) and a sound absorbing layer (3); the outer shell (1) is detachably fixed to the vent of an acoustic facility of an acoustic mute box; a sound-absorbing channel (4) is provided in the outer shell (1) for connecting the outside with the vent of the acoustic facility; the perforated plate (2) is mounted on the inner wall of the sound-absorbing channel (4); and the sound absorbing layer (3) is filled in the cavity between the perforated plate (2) and the outer shell (1).

2. A simple labyrinth muffler box according to claim 1, characterized in that: The outer shell (1) is fixedly connected to fixing ears (5) on all four sides, and the fixing ears (5) are provided with mounting holes.

3. A simple labyrinth muffler box according to claim 1, characterized in that: The muffler channel (4) adopts a labyrinthine structure.

4. The simple labyrinth muffler box according to claim 1, characterized in that: The outer shell (1) is one of a steel plate, an aluminum plate, and a wooden plate.

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