Silencing device of ventilation system

Abstract

The utility model discloses a silencing device of a ventilation system, relates to the technical field of silencing equipment, and aims to solve the problem of loud noise of a high-power ventilation system. The device comprises a silencing pipeline, an air breaking assembly is arranged in the silencing pipeline, the air breaking assembly comprises a connecting piece and an air breaking cone, the connecting piece is fixedly connected in the silencing pipeline, and the air breaking cone is fixedly connected to the connecting piece and used for breaking high-speed air flow in a ventilation pipeline to enable the high-speed air flow to be dispersed into the silencing pipeline. According to the silencing device of the ventilation system, the wind breaking assembly is arranged in the silencing pipeline, dispersion and energy reduction of high-speed airflow are effectively achieved, and therefore noise generated when the ventilation system operates is reduced. Due to the special design of the air breaking cone, high-speed air flow can be effectively distributed when passing through the air breaking cone, the high-speed air flow intensively impacting the inner wall of the pipeline is scattered into a plurality of small flows, the scattered small flows spirally drill into the silencing pipeline, the porous structure in the silencing pipeline can obviously weaken the energy of the air flow, and the silencing effect is improved. Therefore, noise caused by too fast airflow is reduced.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction equipment technology, and in particular to a noise reduction device for a ventilation system. Background Technology

[0002] High-power ventilation systems play a crucial role in numerous industrial production sites, large commercial buildings, and public facilities. They effectively regulate indoor air circulation, ensuring indoor air quality meets people's needs and providing a comfortable environment for production operations and personnel activities. However, a significant problem with existing high-power ventilation systems is excessive noise during operation. This is mainly due to factors such as the intense friction between the impeller and air and the vibration between fan components during high-speed operation. This noise problem has caused serious disturbance to residents. In residential areas surrounding industrial zones, the continuous high-decibel noise from high-power ventilation systems severely disrupts residents' daily lives, leading to decreased sleep quality, and prolonged exposure to noise may even cause a series of health problems. In commercial buildings and public facilities, excessive ventilation noise also reduces people's experience, affecting work efficiency and leisure time.

[0003] Currently, although some noise reduction measures have been tried in high-power ventilation systems, the results are often unsatisfactory and cannot fundamentally solve the problem of excessive noise and disturbance to residents. There is an urgent need for an innovative solution to improve this situation. Utility Model Content

[0004] To address the above shortcomings, this utility model provides a silencing device for an exhaust system to solve the aforementioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A ventilation system silencing device includes a silencing duct and an air-breaking component inside the silencing duct. The air-breaking component includes a connector and an air-breaking cone. The connector is fixed inside the silencing duct, and the air-breaking cone is fixed to the connector to break up the high-speed airflow in the ventilation duct and disperse it into the silencing duct.

[0007] Preferably, it also includes a rainproof component, which is fixedly installed on the upper part of the silencer duct.

[0008] Preferably, the silencing duct includes a silencing cylinder and a silencing mesh. The silencing cylinder includes two connecting rings, which are correspondingly arranged at both ends of the silencing cylinder. The silencing mesh is installed on the two connecting rings, and the connector is fixedly connected to the connecting ring located on the lower side of the silencing cylinder.

[0009] Ideally, the air-breaking cone is cone-shaped, with its tip pointing away from the silencer duct.

[0010] Preferably, the connector includes multiple connecting plates, which are uniformly fixed to the lower part of the silencer duct in a circumferential direction, and the other end of the multiple connecting plates is uniformly fixed to the wind-breaking cone in a circumferential direction.

[0011] Preferably, the rain-shielding component includes a connecting rod, a fixing ring, and a rain-shielding plate. There are multiple connecting rods arranged vertically, and the multiple connecting rods are fixedly connected to the upper part of the silencing duct in a circumferential direction. The fixing ring is fixedly connected to the upper part of the multiple silencing ducts, and the rain-shielding plate is fixedly connected to the fixing ring.

[0012] Preferably, the lower part of the silencer is also provided with a flange, and the silencer is connected to the ventilation system through the flange.

[0013] Preferably, the outer diameter of the connecting ring is smaller than the inner diameter of the muffler so that there is a gap between the muffler and the muffler mesh, and the gap between the muffler and the muffler mesh is filled with sound-absorbing cotton.

[0014] Preferably, the air-breaking cone is also provided with air guide plates, and there are multiple air guide plates that are circumferentially and evenly fixed to the surface of the air-breaking cone.

[0015] Preferably, the rain shield is conical with the tip of the cone facing upwards.

[0016] Compared with existing technologies, the beneficial effects of this utility model are as follows: This device includes a silencing duct, within which a wind-breaking component is installed. The wind-breaking component includes a connector and a wind-breaking cone. The connector is fixed inside the silencing duct, and the wind-breaking cone is fixed to the connector to break up and disperse the high-speed airflow in the ventilation duct into the silencing duct. This ventilation system silencing device effectively disperses and reduces the energy of high-speed airflow by installing a wind-breaking component inside the silencing duct, thereby reducing the noise during ventilation system operation. The connector in the wind-breaking component secures the wind-breaking cone to the center of the silencing duct. The special design of the wind-breaking cone effectively diverts the high-speed airflow as it passes through, breaking up the concentrated high-speed airflow impacting the inner wall of the duct into multiple smaller streams. These dispersed smaller streams of air spiral into the silencing duct. The porous structure inside the silencing duct significantly weakens the energy of the airflow, thereby reducing noise caused by excessively fast airflow. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of the silencing pipe in this utility model;

[0020] Figure 3 In this utility model Figure 2 Cross-sectional view;

[0021] Figure 4 This is a schematic diagram of the overall structure of the wind-breaking component in this utility model;

[0022] Figure 5 This is a schematic diagram of the overall structure of the connecting plate in this utility model;

[0023] Figure 6 This is a schematic diagram of the overall structure of the rain-shielding component in this utility model.

[0024] Reference numerals: 1. Silencing duct; 11. Silencing cylinder; 12. Silencing mesh; 13. Connecting ring; 14. Flange; 15. Silencing cotton; 2. Air-breaking assembly; 21. Connecting piece; 211. Connecting plate; 22. Air-breaking cone; 23. Air guide plate; 3. Rainproof component; 31. Connecting rod; 32. Fixing ring; 33. Rainproof plate. Detailed Implementation

[0025] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] This utility model provides a noise reduction device for a ventilation system, aiming to solve the problem of high noise levels in high-power ventilation systems, which causes serious disturbance to residents. Figures 1-6 As shown, this device includes a silencing duct 1, within which a wind-breaking component 2 is installed. The wind-breaking component 2 includes a connector 21 and a wind-breaking cone 22. The connector 21 is fixed inside the silencing duct 1, and the wind-breaking cone 22 is fixed to the connector 21 to break up and disperse the high-speed airflow in the ventilation duct into the silencing duct 1. This ventilation system silencing device effectively disperses and reduces the energy of the high-speed airflow by installing the wind-breaking component 2 inside the silencing duct 1, thereby reducing the noise during ventilation system operation. The connector 21 in the wind-breaking component 2 secures the wind-breaking cone 22 to the center of the silencing duct 1. The special design of the wind-breaking cone 22 can effectively divert the high-speed airflow as it passes through, breaking the high-speed airflow that is concentrated and impacting the inner wall of the duct into multiple smaller streams. These dispersed smaller streams of air spiral into the silencing duct 1. The porous structure inside the silencing duct 1 significantly weakens the energy of the airflow, thereby reducing noise caused by excessively fast airflow. Furthermore, after passing through the air-breaking cone 22, the overall flow direction of the airflow becomes more stable, further reducing vibration and noise transmission caused by turbulence. The combined design of the air-breaking component 2 and the silencer duct 1 not only reduces noise but also avoids the impact of a sudden drop in airflow velocity on ventilation efficiency, thus ensuring that the system maintains high-efficiency ventilation capacity while reducing noise. The structural design of this device can effectively alleviate the high-decibel noise problem generated by the operation of high-power ventilation systems, providing a quieter environment for surrounding residential areas, while also improving the user experience inside commercial buildings and public facilities.

[0029] In a preferred embodiment, the device further includes a rain-shielding component 3, which is welded and fixed to the upper part of the silencing duct 1. Adding the rain-shielding component 3 further enhances the functionality and environmental adaptability of the device in practical use. The rain-shielding component 3 includes connecting rods 31, fixing rings 32, and a rain-shielding plate 33. Four connecting rods 31 are vertically distributed and evenly circumferentially fixed to the upper part of the silencing duct 1, ensuring the stability and durability of the rain-shielding component 3. The fixing rings 32 are fixedly welded to the upper part of the four connecting rods 31, forming a robust support frame and providing a stable installation foundation for the rain-shielding plate 33. The rain-shielding plate 33 is fixedly welded to the fixing rings 32. Its design effectively prevents rainwater from directly entering the interior of the silencing duct 1, thus avoiding damage to the internal structure of the duct or obstruction of the airflow channel due to rainwater seepage. Simultaneously, the rain-shielding plate 33's protection of rainwater also prevents additional noise generated by water droplets contacting high-speed airflow, further improving the overall noise reduction effect of the silencing device. The addition of the rain-shielding component 3 not only extends the service life of the silencer, but also improves its reliability in harsh outdoor environments, ensuring that the ventilation system can operate stably and efficiently under various weather conditions, providing a stronger guarantee for the normal use of production environments or public places.

[0030] In a preferred embodiment, the silencing duct 1 includes a silencing cylinder 11 and a silencing mesh 12. The combined design of the silencing cylinder 11 and the silencing mesh 12 further optimizes the silencing effect of the airflow and the connection performance of the structure. Connecting rings 13 are respectively provided at both ends of the silencing cylinder 11. The two connecting rings 13 provide a stable mounting base for the silencing mesh 12, allowing it to be firmly fixed inside the silencing cylinder 11 and ensuring its stability under high-speed airflow impact. The structural design of the silencing mesh 12 effectively decomposes the kinetic energy of the airflow, thereby significantly reducing noise generated by turbulence. Simultaneously, a flange 14 is designed at the lower part of the connecting ring 13. The silencing cylinder 11 is tightly connected to the ventilation system through the flange 14. This flange 14 connection method not only ensures a firm connection between the silencing duct 1 and the ventilation system but also reduces airflow leakage at the connection point, improving the overall sealing performance of the system. Furthermore, the connector 21 is fixed to the connecting ring 13 on the lower side of the silencing cylinder 11, providing stable support for the installation of the internal air-breaking component 2, thereby ensuring the coordinated operation of multiple components of the silencing device. Through this modular design, the silencing duct 1 can achieve efficient airflow silencing while possessing strong adaptability and stability, enabling it to exhibit excellent noise reduction effect and structural reliability in high-power ventilation systems, making it suitable for a variety of complex application scenarios.

[0031] In a preferred embodiment, the diameter of the connecting ring 13 is designed to be smaller than that of the silencer cylinder 11, thereby creating a gap between the silencer cylinder 11 and the silencer mesh 12. This gap is then filled with sound-absorbing cotton, significantly improving the noise reduction performance of the device. As a highly efficient sound-absorbing material, the sound-absorbing cotton effectively absorbs noise generated by airflow passing through the gap, especially mid-to-high frequency noise, reducing noise reflection and resonance caused by airflow impacting the mesh or pipe wall. By uniformly filling the gap between the silencer cylinder 11 and the silencer mesh 12 with sound-absorbing cotton, the sound energy generated by airflow surges and turbulence can be further weakened, thus optimizing the overall noise reduction effect. Furthermore, the filling of the sound-absorbing cotton also plays a certain role in vibration damping, mitigating pipe vibration noise caused by airflow and improving the system's operational stability. The optimized design of the connecting ring 13's diameter ensures the stability of the sound-absorbing cotton filling within the gap, preventing material displacement or detachment due to airflow impact, and guaranteeing the device's noise reduction efficiency during long-term use. Through the synergistic effect of this structure and materials, this embodiment not only enhances the ability to absorb and reduce noise, but also improves the overall environmental adaptability of the ventilation system without affecting airflow, providing quieter and more comfortable operating conditions for industrial, commercial and public facilities.

[0032] In a preferred embodiment, the air-breaking cone 22 is designed in a conical shape and mounted on the connector 21 with the cone tip facing downwards. Multiple circumferentially evenly distributed air guide plates 23 are arranged on the surface of the air-breaking cone 22. This structure further enhances the dispersion and guidance effect of the airflow. The diameter of the air-breaking cone 22 is smaller than the inner diameter of the silencer duct 1. The design of the air guide plates 23 further optimizes the flow direction of the airflow when it contacts the air-breaking cone 22, splitting the airflow into more uniform small streams and reducing noise and vibration caused by airflow turbulence. Simultaneously, the circumferential arrangement of the air guide plates 23 forms a ring-shaped guiding structure, allowing the airflow to flow smoothly along a predetermined path when passing through the air-breaking cone 22, effectively reducing the probability of turbulence formation and significantly enhancing the noise reduction function of the air-breaking cone 22. Furthermore, the multi-plate structure of the air guide plates 23 weakens the airflow energy when it passes through at high speed, and subsequently guides the impact and friction between the airflow and the internal structure of the silencer duct 1, further consuming the airflow energy and improving the overall noise reduction effect of the device. The combined design of the air guide plate 23 and the conical air-breaking cone 22 ensures that the airflow is fully dispersed while maintaining the flow rate and efficiency of the ventilation system, avoiding the impact on system performance due to poor airflow guidance. Through the robust connection between the air guide plate 23 and the surface of the air-breaking cone 22, this design also possesses high structural stability, maintaining good performance during long-term operation and making it suitable for noise reduction requirements of ventilation systems in various high-noise environments.

[0033] In a preferred embodiment, the connector 21 provides stable support for the air-breaking cone 22 through multiple connecting plates 211. These connecting plates 211 are circumferentially and evenly fixed to the lower part of the silencer duct 1, with each connecting plate 211 extending obliquely towards the center of the silencer duct 1. The upper part of each connecting plate 211 is bent inwards towards the air-breaking cone 22 and welded to it. This design not only ensures the installation stability of the air-breaking cone 22 but also effectively improves the structural strength and reliability of the entire device. The circumferentially even distribution of the multiple connecting plates 211 balances the force exerted on the air-breaking cone 22 under the impact of high-speed airflow, avoiding vibration or loosening problems caused by uneven force at a single point, thereby ensuring the stability of the air-breaking cone 22 during long-term operation.

[0034] In a preferred embodiment, the rain shield 33 is designed in a conical shape and fixed to the fixing ring 32 with the cone tip facing upwards. This structural design further enhances the protective performance and drainage effect of the device. The conical surface of the rain shield 33 effectively guides rainwater to flow quickly outwards along the surface, preventing rainwater from accumulating on the surface of the rain shield 33, thereby reducing the risk of rainwater seeping into the silencer pipe 1. The upward-facing cone tip arrangement also prevents rainwater from forming accumulation points at the top, effectively preventing rust, corrosion, or other structural damage caused by long-term water accumulation, and extending the service life of the device.

[0035] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A silencing device for a ventilation system, comprising a silencing duct (1), characterized in that... The silencer duct (1) is also provided with a wind-breaking component (2). The wind-breaking component (2) includes a connector (21) and a wind-breaking cone (22). The connector (21) is fixed inside the silencer duct (1), and the wind-breaking cone (22) is fixed on the connector (21) to break up the high-speed airflow in the ventilation duct and disperse it into the silencer duct (1).

2. The silencing device for a ventilation system according to claim 1, characterized in that: It also includes a rainproof component (3), which is fixedly installed on the upper part of the silencing pipe (1).

3. The silencing device for a ventilation system according to claim 1, characterized in that: The silencing pipe (1) includes a silencing cylinder (11) and a silencing mesh (12). The silencing cylinder (11) includes a connecting ring (13). There are two connecting rings (13) and they are correspondingly arranged at both ends of the silencing cylinder (11). The silencing mesh (12) is installed on the two connecting rings (13). The connector (21) is fixed to the connecting ring (13) located on the lower side of the silencing cylinder (11).

4. The silencing device for a ventilation system according to claim 1, characterized in that: The wind-breaking cone (22) is cone-shaped, and the tip of the wind-breaking cone (22) faces away from the silencer pipe (1).

5. A silencing device for a ventilation system according to claim 1, characterized in that: The connector (21) includes multiple connecting plates (211), which are uniformly fixed to the lower part of the silencing pipe (1) in a circumferential direction, and the other end of the multiple connecting plates (211) is uniformly fixed to the wind-breaking cone (22) in a circumferential direction.

6. A silencing device for a ventilation system according to claim 2, characterized in that: The rain-shielding component (3) includes a connecting rod (31), a fixing ring (32), and a rain-shielding plate (33). There are multiple connecting rods (31) arranged vertically. The multiple connecting rods (31) are fixedly connected to the upper part of the silencing pipe (1) in a circumferential direction. The fixing ring (32) is fixedly connected to the upper part of the multiple silencing pipes (1). The rain-shielding plate (33) is fixedly connected to the fixing ring (32).

7. A silencing device for a ventilation system according to claim 3, characterized in that: The lower part of the silencer (11) is also provided with a flange (14), and the silencer (11) is connected to the ventilation system through the flange (14).

8. A silencing device for a ventilation system according to claim 3, characterized in that: The outer diameter of the connecting ring (13) is smaller than the inner diameter of the muffler (11) so that there is a gap between the muffler (11) and the muffler mesh (12), and the gap between the muffler (11) and the muffler mesh (12) is filled with sound-absorbing cotton (15).

9. A silencing device for a ventilation system according to claim 4, characterized in that: The wind-breaking cone (22) is also provided with a wind guide plate (23), and there are multiple wind guide plates (23) that are uniformly fixed to the surface of the wind-breaking cone (22) in a circumferential manner.

10. A silencing device for a ventilation system according to claim 6, characterized in that: The rain shield (33) is conical, with the tip of the rain shield (33) pointing upwards.

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