Silencing device for heating ventilation air conditioner ventilation system

Abstract

The utility model discloses a silencing device for a ventilation system of a heating ventilation air conditioner, and relates to the technical field of heating ventilation air conditioner equipment, the silencing device comprises a ventilation pipeline and a silencing assembly, the silencing assembly is used for eliminating noise generated in the ventilation process of the interior of the ventilation pipeline, and the silencing assembly comprises a silencing laminated plate and a side position closing plate; the side closing plate is fixedly connected to the side face of the silencing laminated plate, and a first high-frequency absorption layer, a low-frequency absorption layer and a second high-frequency absorption layer are arranged between the silencing laminated plate and the side closing plate. According to the utility model, the high-frequency absorption layer I, the low-frequency absorption layer and the high-frequency absorption layer II are arranged to form the structure shaped like the Chinese character'pin ', so that noise with different frequencies is subjected to targeted absorption treatment. The high-frequency absorption layer adopts melamine foam plastic to effectively capture high-frequency sound wave energy, and the low-frequency absorption layer and the sound absorption cotton layer have a synergistic effect to absorb low-and-medium-frequency noise, so that comprehensive treatment of broadband noise generated by the ventilation system is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a heating ventilation air conditioner equipment technical field, concretely relates to a kind of muffling device for heating ventilation air conditioner ventilation system. BACKGROUND

[0002] In the actual operation process of heating ventilation air conditioner ventilation system, a variety of frequency noise can be generated. On the one hand, the airflow in the ventilation duct flows at high speed, which can easily cause situations such as airflow friction, turbulence, etc., thereby generating noise covering different frequency bands such as low frequency, medium frequency and high frequency. Traditional muffling devices often only focus on the processing of a certain specific frequency band noise (commonly known as low frequency), such as using only a single sound-absorbing cotton as a sound-absorbing material, but the sound-absorbing cotton has poor absorption effect on high frequency noise. This results in that in actual use scenarios, although part of the low frequency noise is controlled to a certain extent, the high frequency noise can still be propagated, which greatly reduces the overall noise reduction effect, affects the quietness of the surrounding environment and the comfort experience of people using the heating ventilation air conditioner, and cannot meet the diversified noise elimination needs.

[0003] On the other hand, different use environments have increasingly strict requirements for noise control. For example, in hospitals, libraries, office buildings and other places, it is necessary to eliminate noise of various frequencies as much as possible to avoid interference with people's work, study, rest and other activities. However, the existing ventilation system noise elimination means lacks a comprehensive solution that can effectively deal with multi-band noise at the same time, so there is an urgent need for a device that can achieve wideband sound absorption and comprehensively reduce the noise of the ventilation system. SUMMARY

[0004] The purpose of the utility model is to provide a muffling device for heating ventilation air conditioner ventilation system to solve the problems raised in the background art.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] A muffling device for heating ventilation air conditioner ventilation system, comprising a ventilation duct and a sound-absorbing assembly, the sound-absorbing assembly is used to eliminate the noise generated during the ventilation process inside the ventilation duct, the sound-absorbing assembly comprises a sound-absorbing laminated plate and a side sealing plate, the side sealing plate is fixedly connected to the side surface of the sound-absorbing laminated plate, and a high-frequency absorption layer one, a low-frequency absorption layer and a high-frequency absorption layer two are arranged between the sound-absorbing laminated plate and the side sealing plate.

[0007] One side of the high-frequency absorption layer one is fixedly attached to the sound-absorbing laminated plate, the side of the high-frequency absorption layer one away from the sound-absorbing laminated plate is fixedly attached to the low-frequency absorption layer, the bottom end side of the low-frequency absorption layer is fixedly connected to the high-frequency absorption layer two, and the side of the high-frequency absorption layer two away from the low-frequency absorption layer is fixedly attached to one side of the sound-absorbing laminated plate.

[0008] One side of the low-frequency absorption layer is fixedly attached to the side of the side-located sealing plate close to the sound-absorbing laminated plate, the sound-absorbing laminated plate comprises an upper sound-absorbing layer plate, a central sound-absorbing layer plate and a lower sound-absorbing layer plate, the upper sound-absorbing layer plate, the central sound-absorbing layer plate and the lower sound-absorbing layer plate are arranged in sequence from top to bottom, and the sound-absorbing laminated plate is used for increasing the distance and the reflection times of the sound inside the ventilation duct.

[0009] Further improvement of the technical scheme of the utility model lies in that the upper sound-absorbing layer plate and the lower sound-absorbing layer plate are distributed in axial symmetry with the transverse center line of the central sound-absorbing layer plate as the axis.

[0010] Further improvement of the technical scheme of the utility model lies in that the upper surface of the central sound-absorbing layer plate close to one end is provided with a refractive arc groove, and one end of the central sound-absorbing layer plate is provided with a stepped refractive groove.

[0011] Further improvement of the technical scheme of the utility model lies in that the upper surface center of the lower sound-absorbing layer plate is fixedly connected with a stepped refractive convex block.

[0012] Further improvement of the technical scheme of the utility model lies in that the inner walls of the upper sound-absorbing layer plate and the lower sound-absorbing layer plate and the outer wall of the central sound-absorbing layer plate are all fixedly attached with sound-absorbing cotton layers.

[0013] Further improvement of the technical scheme of the utility model lies in that the inner wall top of the ventilation duct is rotatably connected with a fastening turnover plate, and the fastening turnover plate is detachably fixedly connected with one end of the sound-absorbing laminated plate through fastening bolts.

[0014] Due to the adoption of the above technical scheme, the utility model has the following technical progress compared with the prior art:

[0015] 1. The utility model provides a kind of sound-absorbing device for heating ventilation air conditioning ventilation system, and the noise of different frequency is handled by the absorption of the high-frequency absorption layer one, low-frequency absorption layer and high-frequency absorption layer two formed trident shape structure specifically.The high-frequency absorption layer effectively captures high-frequency sound wave energy using melamine foam, and low-frequency absorption layer and sound-absorbing cotton layer material synergistic effect absorbs middle-low frequency noise, realizes the comprehensive processing of the wideband noise generated by ventilation system, can substantially reduce the noise level in the process of air outlet in ventilation duct, reduce the noise interference to surrounding environment, improve the use comfort of heating ventilation air conditioning system.

[0016] 2.The utility model provides a kind of for heating ventilation air conditioner ventilation system's silencer, and the zigzag structure of sound-absorbing laminated board is composed of upper sound-absorbing laminated board, center sound-absorbing laminated board and lower sound-absorbing laminated board, not only can shunt wind, make airflow distribute more evenly in pipeline, and effectively increase the distance and reflection times of sound propagation.High-frequency noise is continuously reflected, interfered and energy is consumed in this complex structure of air duct, in combination with the absorption of low-frequency noise of each layer of sound-absorbing cotton layer, greatly enhance the overall sound-absorbing effect, so that the silencer can adapt to the noise elimination demand under a variety of complex working conditions, improve the applicability and effectiveness of silencer in heating ventilation air conditioner ventilation system. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structural schematic diagram of the utility model;

[0018] Figure 2 It is the structural schematic diagram of the sound-absorbing assembly of the utility model;

[0019] Figure 3 It is the enlarged schematic diagram of structure A of the utility model;

[0020] Figure 4 It is the structural schematic diagram of sound-absorbing laminated board of the utility model.

[0021] In the drawing: 1, ventilation duct; 2, sound-absorbing assembly; 3, sound-absorbing laminated board; 4, side position closing plate; 5, high-frequency absorption layer one; 6, low-frequency absorption layer; 7, high-frequency absorption layer two; 8, upper sound-absorbing laminated board; 9, center sound-absorbing laminated board; 10, lower sound-absorbing laminated board; 11, stepped refraction groove; 12, refraction arc groove; 13, sound-absorbing cotton layer; 14, stepped refraction convex block; 15, fastening bolt; 16, fastening turnover plate. DETAILED DESCRIPTION

[0022] In the description of the utility model, it also needs to be explained that, unless there is explicit provision and limitation, the terms "arrangement" "installation" "connection" "connect" should be broad understanding, for example, can be fixed connection, can be detachable connection, or integrally connected;Can be mechanical connection, can be electrical connection;It can be directly connected, can be indirectly connected through intermediate medium, it can be the intercommunication of two elements.For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0023] The utility model will be further described in detail in combination with embodiment as follows: Example 1

[0024] As Figures 1-4As shown, the utility model provides a kind of muffling device for heating ventilation air conditioning ventilation system, including ventilation pipeline 1 and sound-absorbing component 2, sound-absorbing component 2 is used to eliminate the noise generated in the ventilation process inside ventilation pipeline 1, sound-absorbing component 2 includes sound-absorbing laminated board 3 and side position closing plate 4, side position closing plate 4 is fixedly connected on the side of sound-absorbing laminated board 3, sound-absorbing laminated board 3 and side position closing plate 4 between being provided with high frequency absorption layer one 5, low frequency absorption layer 6 and high frequency absorption layer two 7;

[0025] The side of high frequency absorption layer one 5 is fixedly attached with sound-absorbing laminated board 3, the side of high frequency absorption layer one 5 away from sound-absorbing laminated board 3 is fixedly attached with low frequency absorption layer 6, the bottom end side of low frequency absorption layer 6 is fixedly connected with high frequency absorption layer two 7, the side of high frequency absorption layer two 7 away from low frequency absorption layer 6 is fixedly attached with the side of sound-absorbing laminated board 3;

[0026] The side of low frequency absorption layer 6 is fixedly attached with the side of side position closing plate 4 close to sound-absorbing laminated board 3, sound-absorbing laminated board 3 includes upper sound-absorbing layer plate 8, center sound-absorbing layer plate 9 and lower sound-absorbing layer plate 10, upper sound-absorbing layer plate 8, center sound-absorbing layer plate 9 and lower sound-absorbing layer plate 10 are arranged and distributed in order from top to bottom, and sound-absorbing laminated board 3 is used to increase the distance and reflection times of sound inside ventilation pipeline 1. Example 2

[0027] As Figures 1-4 As shown, on the basis of example 1, the utility model provides a kind of technical scheme: preferably, upper sound-absorbing layer plate 8 and lower sound-absorbing layer plate 10 are distributed with the horizontal center line of center sound-absorbing layer plate 9 as axis symmetry.

[0028] The upper surface close to one end of center sound-absorbing layer plate 9 is provided with refractive arc groove 12, and one end of center sound-absorbing layer plate 9 is provided with stepped refractive groove 11.

[0029] The upper surface center of lower sound-absorbing layer plate 10 is fixedly connected with stepped refractive convex block 14.

[0030] The inner wall of upper sound-absorbing layer plate 8 and lower sound-absorbing layer plate 10 and the outer wall of center sound-absorbing layer plate 9 are all fixedly attached with sound-absorbing cotton layer 13.

[0031] The inner wall top of ventilation pipeline 1 is rotatably connected with fastening turnover plate 16, and fastening turnover plate 16 is detachably fixedly connected with one end of sound-absorbing laminated board 3 through fastening bolt 15.

[0032] The working principle of the muffling device for heating ventilation air conditioning ventilation system will be described below.

[0033] As Figures 1-4 As shown, when using, the noise generated in ventilation pipeline 1 is absorbed and eliminated by using sound-absorbing component 2, to reduce the noise generated in the air outlet process inside ventilation pipeline 1.

[0034] The air duct formed by the upper sound-absorbing layer plate 8, the center sound-absorbing layer plate 9 and the lower sound-absorbing layer plate 10 in the sound-absorbing laminated plate 3 can split the air, and the sound propagation distance and reflection times in the air duct 1 are increased by the zigzag structure formed by the sound-absorbing laminated plate 3. Further, the high-frequency noise can be reflected, interfered and energy consumed in the air duct. The sound-absorbing cotton layer 13 attached to the three sound-absorbing layer plates can further absorb the low-frequency noise and enhance the sound-absorbing effect.

[0035] The high-frequency absorbing layer one 5 and the high-frequency absorbing layer two 7 can be made of melamine foam, which has excellent high-frequency sound-absorbing performance and can effectively capture and consume the energy of high-frequency sound waves.

[0036] The low-frequency absorbing layer 6 can be made of the same material as the sound-absorbing cotton layer 13.

[0037] The high-frequency absorbing layer one 5, the low-frequency absorbing layer 6 and the high-frequency absorbing layer two 7 form a triangular structure, which can absorb the high-frequency noise by the high-frequency absorbing layer one 5 and the high-frequency absorbing layer two 7 when the noise enters, and the remaining low-frequency noise is processed by the low-frequency absorbing layer 6. By this combination, the comprehensive sound-absorbing effect on different frequency noises can be improved.

[0038] The above has made a detailed description of the utility model, but some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, the modifications or improvements without departing from the spirit of the utility model are within the protection scope of the utility model.

Claims

1. A sound attenuation device for heating, ventilation, air conditioning and ventilation systems, comprising a ventilation duct (1) and a sound attenuation assembly (2), characterized in that: The sound-absorbing assembly (2) is used for eliminating the noise generated in the ventilation process in the ventilation duct (1), and comprises a sound-absorbing laminated plate (3) and a side sealing plate (4) fixedly connected to the side of the sound-absorbing laminated plate (3), and a high-frequency absorption layer one (5), a low-frequency absorption layer (6) and a high-frequency absorption layer two (7) are arranged between the sound-absorbing laminated plate (3) and the side sealing plate (4). One side of the high-frequency absorption layer one (5) is fixedly attached to the sound-absorbing laminated plate (3), the side of the high-frequency absorption layer one (5) away from the sound-absorbing laminated plate (3) is fixedly attached to the low-frequency absorption layer (6), the bottom end of the low-frequency absorption layer (6) is fixedly connected to the high-frequency absorption layer two (7), and the side of the high-frequency absorption layer two (7) away from the low-frequency absorption layer (6) is fixedly attached to one side of the sound-absorbing laminated plate (3). One side of the low-frequency absorption layer (6) is fixedly attached to the side of the side sealing plate (4) close to the sound-absorbing laminated plate (3), the sound-absorbing laminated plate (3) comprises an upper sound-absorbing layer plate (8), a center sound-absorbing layer plate (9) and a lower sound-absorbing layer plate (10), the upper sound-absorbing layer plate (8), the center sound-absorbing layer plate (9) and the lower sound-absorbing layer plate (10) are arranged in sequence from top to bottom, and the sound-absorbing laminated plate (3) is used for increasing the distance and reflection times of the sound in the ventilation duct (1).

2. A sound attenuation device for use in a heating, ventilation, air conditioning and ventilation system according to claim 1, characterized in that: The upper sound-absorbing layer plate (8) and the lower sound-absorbing layer plate (10) are symmetrically distributed about the transverse center line of the center sound-absorbing layer plate (9).

3. A sound attenuation device for use in a heating, ventilation, air conditioning and ventilation system according to claim 1, characterized in that: The upper surface of the center sound-absorbing layer plate (9) close to one end is provided with a refraction arc groove (12), and one end of the center sound-absorbing layer plate (9) is provided with a stepped refraction groove (11).

4. A sound attenuation device for use in a heating, ventilation, air conditioning and ventilation system according to claim 1, characterized in that: The upper surface of the lower sound-absorbing layer plate (10) is fixedly connected with a stepped refraction bump (14).

5. A sound attenuation device for use in a heating, ventilation, air conditioning and ventilation system according to claim 1, characterized in that: The inner walls of the upper sound-absorbing layer plate (8) and the lower sound-absorbing layer plate (10), and the outer wall of the center sound-absorbing layer plate (9) are fixedly attached with a sound-absorbing cotton layer (13).

6. A sound attenuation device for use in a heating, ventilation, air conditioning and ventilation system according to claim 1, characterized in that: The inner wall of the ventilation duct (1) is rotatably connected with a fastening turnover plate (16), and one end of the fastening turnover plate (16) is detachably fixedly connected with the sound-absorbing laminated plate (3) through a fastening bolt (15).

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