Roof large impedance type composite flow guide silencer
The combined design of static pressure box and V-type resistance silencer solved the problem of low-frequency noise from large rooftop equipment, achieving effective noise control and improving the working environment and the quality of life for residents.
Patent Information
- Application Number
- CN202423300467.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The low- and mid-frequency noise generated by existing large rooftop equipment during operation has a serious impact on human health and the environment, and there is a lack of effective noise control technology.
The composite flow-guiding silencer design employs a static pressure box and a V-type resistance silencer. The change in the cross-sectional area of the static pressure box causes a sudden change in acoustic impedance. Combined with porous and sound-absorbing materials, the noise energy is absorbed, and the V-type resistance silencer performs multiple reflections to absorb the noise, thereby reducing noise.
It effectively reduces low- and mid-frequency noise, improves the working environment and the quality of life for residents, has a wide-band noise reduction effect, and is suitable for complex noise environments.
Smart Images
Figure CN223724029U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of noise control especially relates to a roof large impedance type composite flow guide silencer. BACKGROUND
[0002] The existing roof large chimney and other noise source equipment can produce continuous low-frequency wind power noise when running. Research shows that continuous low-frequency noise is easy to cause resonance of human organs, make people nervous, heart rate faster, blood sugar, blood pressure higher, endocrine disorder, and heart, spleen, liver and kidney will be damaged to a certain extent, if living in the low-frequency noise for a long time, the mood will become easy to worry and agitation, neurasthenia, insomnia, headache, irritability, even lose reason. In summary, the uncontrolled low-frequency noise can seriously affect the staff and surrounding residents. At present, there is no complete noise control technology that can effectively control the continuous noise produced by the roof chimney and other large equipment, and the present application is effective for controlling the continuous noise produced by such noise source when running. SUMMARY
[0003] The utility model aims at providing a roof large impedance type composite flow guide silencer, which can effectively control the continuous noise produced by the roof chimney and other large equipment, and improve the working environment and the living quality of surrounding residents.
[0004] The utility model is implemented by the following technical scheme: a roof large impedance type composite flow guide silencer, characterized by comprising a static pressure tank and a V-shaped resistance type silencer, the static pressure tank is arranged on the air inlet, the cross-sectional area of the static pressure tank in the airflow direction is larger than that of the air inlet, a side of the static pressure tank is provided with an air outlet channel, the airflow entering the static pressure tank from the air inlet is discharged from the air outlet channel, and the air outlet channel is provided with the V-shaped resistance type silencer.
[0005] Further, one side of the interior of the static pressure tank is a porous perforated material.
[0006] Further, the static pressure tank is provided with a flow guide inclined plate above the air inlet.
[0007] Further, the flow guide inclined plate is a 45° turning inclined angle, which guides the airflow to turn, reduces the resistance, and makes the airflow flow smoothly to the air outlet channel.
[0008] Further, the V-shaped resistance type silencer is provided with two groups of positive and negative.
[0009] Further, the side wall of the air outlet channel is a porous material, and the interior is an acoustic material.
[0010] Further, one end of the air outlet channel is an air outlet, and the air outlet is provided with an inclined angle, thereby achieving the rainproof effect.
[0011] The roof large impedance type composite flow guide silencer has the beneficial effects of:
[0012] Effective noise reduction: through the impedance composite silencer and the flow guide design, the continuous noise generated by the roof large chimney and other equipment is effectively treated, and the influence on the staff and the surrounding residents is reduced.
[0013] Broadband noise reduction: the silencer has good noise treatment effect in a low, medium and high wide frequency range, and can effectively cope with complex and diverse noise environments. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained from the structures shown in these drawings without creative labor.
[0015] Figure 1 It is a schematic view of a roof large impedance type composite flow guide silencer.
[0016] In the figure, 1 is a static pressure tank, 2 is an air outlet channel, 3 is a V-shaped resistance silencer, 4 is a flow guide inclined plate, 5 is an air inlet, and 6 is an air outlet. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.
[0018] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0019] As Figure 1 shown, a roof large impedance type composite flow guide silencer includes a static pressure tank 1 and a V-shaped resistance silencer 3, the static pressure tank 1 is arranged on the air inlet 5, and the cross-sectional area of the static pressure tank 1 in the airflow direction is greater than the cross-sectional area of the air inlet 5 in the airflow direction.
[0020] When the noise enters the static pressure box 1, the sound impedance is suddenly changed due to the instantaneous expansion of the conduction section, so that the noise is reflected and interfered in the static pressure box 1, thereby consuming the energy of the noise, and meanwhile, one side of the inside of the static pressure box 1 is a porous perforated material, so that when the noise is reflected in the static pressure box 1, the noise can enter the inside of the plate and contact the sound-absorbing material such as the extremely fine glass fiber in the inside of the plate, so that the sound energy is converted into mechanical energy and is no longer reflected back to the air, thereby realizing the absorption of sound energy.
[0021] One side of the static pressure box 1 is provided with an air outlet channel 2, and the airflow entering the static pressure box 1 from the air inlet 5 is discharged from the air outlet channel 2, and the air outlet channel 2 is provided with a V-shaped resistance muffler 3, and the V-shaped resistance muffler 3 is provided with two groups of positive and negative groups, the side wall of the air outlet channel 2 is a porous material, and the inside is sound-absorbing material such as extremely fine glass fiber, and the generated noise is reduced by the resistance static pressure box 1, and due to the sound-absorbing reduction effect of the V-shaped resistance muffler 3, the noise cannot be directly discharged from the air outlet channel 2, and needs to be reflected and absorbed by the two groups of V-shaped resistance mufflers 3 for multiple times, so that the noise is reduced to the maximum extent.
[0022] One end of the air outlet channel 2 is an air outlet 6, and the air outlet is provided with an inclined angle, thereby achieving the effect of preventing rain. The static pressure box 1 is provided with a flow guide inclined plate 4 above the air inlet 5, and the flow guide inclined plate 4 is a 45° turning inclined angle, which guides the airflow to turn and reduces the resistance, so that the airflow can flow smoothly to the direction of the air outlet channel 2.
[0023] In the above embodiment, the basic principle and main features of the utility model and the advantages of the utility model are described. It should be understood by those skilled in the art that the utility model is not limited by the above embodiment, and the above embodiment and the description in the specification are only to illustrate the principle of the utility model, and the changes and variations made by those skilled in the art without departing from the spirit and scope of the utility model should be within the protection scope of the claims of the utility model.
Claims
1. A roof large impedance type composite flow guide silencer, characterized by, It comprises a static pressure box (1) and a V-shaped resistance muffler (3), the static pressure box (1) is arranged on the air inlet (5), the cross-sectional area of the static pressure box (1) in the airflow direction is larger than that of the air inlet (5), one side of the static pressure box (1) is provided with an air outlet channel (2), the airflow entering the static pressure box (1) from the air inlet (5) is discharged from the air outlet channel (2), and the V-shaped resistance muffler (3) is arranged in the air outlet channel (2).
2. A roof mounted large scale resistive composite flow dissipater according to claim 1, wherein, One side of the static pressure box (1) is a porous perforated material.
3. A large roof impedance type composite flow guide silencer according to claim 1, characterized in that, The static pressure box (1) is provided with a flow guide inclined plate (4) above the air inlet (5).
4. A roof mounted large scale resistive composite flow guide silencer according to claim 3, wherein, The flow guide inclined plate (4) is a 45° deflection inclined angle, which guides the airflow to deflect, reduces the resistance, and makes the airflow flow smoothly to the air outlet channel (2).
5. A large roof impedance composite flow guide silencer according to claim 1, wherein, The V-shaped resistance muffler (3) is provided with two groups of positive and negative.
6. A large roof impedance composite flow guide silencer according to claim 1, wherein, The side wall of the air outlet channel (2) is a porous material, and the inside is a sound absorbing material.
7. A large roof impedance composite flow guide silencer according to claim 1, wherein, One end of the air outlet channel (2) is an air outlet (6), and the air outlet is provided with an inclined angle, thereby achieving the effect of rainproof.