Array silencer V-shaped reflective sound absorber

Abstract

The utility model discloses array formula muffler technical field's array formula muffler V type reflection formula sound absorber, including the frame of sound absorber, two V type plates are placed in the frame inboard activity, the frame is filled with glass wool, the glass wool outside is wrapped with glass silk cloth, the cavity is formed to V type board one side, utilize the built -in V type board, strengthen the absorption and reflection of noise sound energy, make a part of sound energy avoid transmission to acoustic environment because of reflection, these characteristics have the value such as silencing, noise reduction, energy -conserving and low carbon, relative traditional sound absorber, array formula muffler V type reflection formula sound absorber has improved the sound absorption performance and silencing performance of sound absorber.

Description

Technical Field

[0001] This utility model relates to the field of array-type silencers, specifically to an array-type silencer V-shaped reflective sound absorber. Background Technology

[0002] In ventilation and air conditioning systems (such as central air conditioning in shopping malls, exhaust systems in industrial workshops, and ventilation ducts in subways), array silencers are the core equipment for noise control. They reduce aerodynamic noise (such as fan noise and airflow turbulence noise) generated during the operation of ventilation systems by arranging multiple sound absorbers in the airflow channel and utilizing the sound-absorbing materials (such as glass wool and porous ceramics) to absorb noise energy, thus ensuring that the indoor acoustic environment meets the standards. With the increasing noise control requirements of modern buildings and the increase in air volume and air velocity of ventilation systems, the sound attenuation performance of traditional array silencers is no longer sufficient for high-requirement scenarios, and there is an urgent need to improve sound absorption efficiency and sound attenuation coverage through structural innovation. Currently, traditional array-type silencers generally adopt flat-plate or cylindrical sound absorber structures. These designs have significant performance shortcomings, limiting the improvement of noise reduction effects. On the one hand, the contact area between the sound absorber and the airflow is limited. Flat-plate sound absorbers only contact the airflow on two sides, and although cylindrical sound absorbers have a surround contact, sound energy can only enter the interior of the sound-absorbing material through surface pores. Moreover, the airflow is prone to regenerating noise due to excessively high airflow velocity, which weakens the noise reduction effect. On the other hand, the utilization of sound energy reflection is insufficient. Traditional sound absorbers rely solely on the passive absorption of the sound-absorbing material and do not conduct secondary guidance on the unabsorbed sound energy. Some sound energy will directly penetrate the sound absorber and propagate to the downstream acoustic environment. To improve the noise reduction, traditional solutions often increase the number of sound absorbers or increase the thickness of the sound-absorbing material. This leads to an increase in the size of the silencer and an increase in wind resistance, which not only increases the cost of equipment installation space but also increases the energy consumption of the fan. Therefore, it is necessary to design an array-type silencer with a V-shaped reflective sound absorber to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide an array-type silencer with a V-shaped reflective sound absorber to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an array-type silencer with a V-shaped reflective sound absorber, including a frame for the sound absorber, two V-shaped plates movably placed inside the frame, glass wool filling the frame, glass wool wrapped with glass fiber cloth on the outside, and a cavity formed on one side of the V-shaped plates.

[0005] Preferably, the V-shaped plate has a fixing part extending from both sides, and one side of the fixing part has a plurality of through holes arranged in a rectangular pattern.

[0006] Preferably, fixing strips are welded to both sides of the frame, and the fixing part is slidably connected to the fixing strips.

[0007] Preferably, galvanized perforated plates are fixed to the outer perimeter of the frame by rivets.

[0008] Preferably, galvanized steel plates are installed at both ends of the frame by rivets, and the outer edge of the galvanized steel plates is arc-shaped.

[0009] Compared with the prior art, the beneficial effects of this utility model are: 1. When noise enters the array-type silencer, the sound waves propagate randomly inside the silencer and enter the sound absorber at different angles. The glass wool filling the frame is ultra-fine centrifugal glass wool, wrapped with glass fiber cloth. The ultra-fine centrifugal glass wool is a porous sound-absorbing material made by centrifugal blowing process, forming a large number of continuous and interconnected micropores inside. This special structure gives it a significant advantage in the field of sound absorption and noise reduction. The V-shaped cavity of the V-shaped plate, using the V-shaped "sound absorption and reflection" plate built into the V-shaped reflective sound absorber of the array-type silencer, enhances the absorption and reflection of noise sound energy, so that some sound energy is avoided from being transmitted to the acoustic environment due to reflection. These characteristics have the value of sound absorption, noise reduction, energy saving and low carbon emissions. Compared with traditional sound absorbers, the V-shaped reflective sound absorber of the array-type silencer improves the sound absorption and sound absorption performance of the sound absorber.

[0010] 2. Multiple through holes on one side of the fixing part facilitate sound flow. The fixing part can be disassembled and installed / fixed from the frame. The fixing strip can be used to install and fix the V-shaped plate through the fixing part. Noise passing through the galvanized perforated plate and rubbing against the glass wool generates heat energy, reducing noise. Sound waves entering the sound absorber at different angles will encounter the V-shaped sound absorption structure inside the sound absorber. These sound absorption structures will cause some incident sound waves to be reflected towards the inlet end of the silencer, thus preventing them from entering the air outlet end and reducing the noise value after exiting the silencer. Compared with unreflected sound waves, the reflected sound waves have a longer propagation path in the glass wool, which can further reduce the noise passing through the silencer and improve the overall sound absorption effect of the array silencer. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a front sectional perspective view of the overall structure of this utility model; Figure 4 The overall structure of this utility model Figure 3 Enlarged view of point A in the middle.

[0012] In the diagram: 1. Frame; 2. V-shaped plate; 3. Cavity; 4. Fixing part; 5. Through hole; 6. Fixing strip; 7. Galvanized perforated plate; 8. Galvanized steel plate. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Example 1 Please refer to Figure 1-4 As shown, this utility model provides an array-type silencer with a V-shaped reflective sound absorber, including a frame 1 of the sound absorber, two V-shaped plates 2 are movably placed inside the frame 1, the frame 1 is filled with glass wool, the outside of the glass wool is wrapped with glass fiber cloth, and a cavity 3 is formed on one side of the V-shaped plate 2.

[0015] Specifically, when noise enters the array-type silencer, the sound waves propagate randomly inside the silencer and enter the sound absorber at different angles. The glass wool filled in the frame 1 is ultra-fine centrifugal glass wool, wrapped with glass fiber cloth. The ultra-fine centrifugal glass wool is a porous sound-absorbing material made by centrifugal blowing process, forming a large number of continuous and interconnected micropores inside. This special structure gives it a significant advantage in the field of sound absorption and noise reduction. By utilizing the V-shaped "sound absorption and reflection" plate built into the V-shaped reflective sound absorber of the array-type silencer, the absorption and reflection of noise sound energy are enhanced, so that some sound energy is avoided from being transmitted to the acoustic environment due to reflection. These characteristics have the value of sound absorption, noise reduction, energy saving and low carbon emissions. Compared with traditional sound absorbers, the V-shaped reflective sound absorber of the array-type silencer improves the sound absorption and sound absorption performance of the sound absorber.

[0016] Among them, the V-shaped plate 2 has a fixing part 4 extending from both sides, and a plurality of through holes 5 arranged in a rectangular pattern are opened on one side of the fixing part 4. Fixing strips 6 are welded to both sides of the frame 1, and the fixing part 4 and the fixing strips 6 are slidably connected.

[0017] More specifically, the multiple through holes 5 on one side of the fixing part 4 facilitate sound flow. The fixing part 4 can be detached from and fixed to the frame 1. The fixing strip 6 can be used to install and fix the V-shaped plate 2 through the fixing part 4. Noise passing through the galvanized perforated plate 7 generates heat energy through friction with the glass wool, reducing noise. Sound waves entering the sound absorber at different angles will encounter the V-shaped sound absorption structure inside the sound absorber. These sound absorption structures will cause some incident sound waves to be reflected to the direction of the silencer inlet end, thus preventing them from entering the air outlet end and reducing the noise value after exiting the silencer. Compared with unreflected sound waves, the reflected sound waves have a longer propagation path in the glass wool, thus further reducing the noise passing through the silencer and improving the overall sound absorption effect of the array silencer.

[0018] It should be added that galvanized perforated plates 7 are fixed to the four sides of the outer side of the frame 1 by rivets, and galvanized steel plates 8 are installed at both ends of the frame 1 by rivets. The outer edges of the galvanized steel plates 8 are arc-shaped.

[0019] Furthermore, four galvanized perforated plates 7 are located on the outer side of the frame 1. The galvanized perforated plates 7 allow sound in the air to pass through the galvanized perforated plates 7 and enter the frame 1 for sound absorption and noise reduction. Two galvanized steel plates 8 are located at both ends of the frame 1, which facilitates the welding and fixing of multiple sound absorbers through external metal frames.

[0020] Working principle: First, the V-shaped plate 2 is fixed to one side of the fixing strip 6, then the galvanized steel plate 8 is inserted at both ends of the frame 1, and then the galvanized perforated plate 7 is laid on the outside of the frame 1 and fixed with multiple rivets. When noise enters the array silencer, the sound waves propagate irregularly inside the silencer and enter the sound absorber at different angles. The noise passes through the galvanized perforated plate 7 and generates heat energy by rubbing against the glass wool, which reduces the noise. In addition, the sound waves entering the sound absorber at different angles will encounter the V-shaped sound absorption structure V-shaped cavity 3 inside the sound absorber. The V-shaped plate 2 built into the frame 1 absorbs the sound, which enhances the absorption and reflection of the noise energy, so that some of the incident sound waves are reflected to the direction of the silencer inlet end, so as not to enter the air outlet end, reducing the noise value after exiting the silencer. The reflected sound waves have a longer propagation path in the glass wool than the unreflected sound waves.

[0021] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0022] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An array-type silencer with a V-shaped reflective sound absorber, comprising a frame (1) of the sound absorber, characterized in that: Two V-shaped plates (2) are movably placed inside the frame (1). The frame (1) is filled with glass wool, and the glass wool is wrapped with glass fiber cloth. A cavity (3) is formed on one side of the V-shaped plate (2).

2. The array-type silencer V-shaped reflective sound absorber according to claim 1, characterized in that: The V-shaped plate (2) has a fixing part (4) extending from both sides, and a plurality of through holes (5) arranged in a rectangular pattern are provided on one side of the fixing part (4).

3. The array-type silencer V-shaped reflective sound absorber according to claim 2, characterized in that: The frame (1) is welded with fixing strips (6) on both sides, and the fixing part (4) is slidably connected to the fixing strips (6).

4. The array-type silencer V-shaped reflective sound absorber according to claim 2, characterized in that: The frame (1) has galvanized perforated plates (7) fixed to its outer four sides by rivets.

5. The array-type silencer V-shaped reflective sound absorber according to claim 2, characterized in that: The frame (1) has galvanized steel plates (8) installed at both ends by rivets, and the outer edge of the galvanized steel plates (8) is arc-shaped.

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