Flow guide type noise elimination elbow
By using the design of the flow-guiding silencer elbow, the problems of reduced airflow and noise propagation in existing silencer elbows are solved by utilizing the right-angle shell, silencer body and arc-shaped silencer cavity, thus achieving effective noise reduction and airflow maintenance.
Patent Information
- Application Number
- CN202520358452.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-04
AI Technical Summary
Existing silencer elbows suffer from reduced airflow and noise entering downstream areas when reducing noise during airflow turns.
The design adopts a flow-guiding silencer elbow, which includes a right-angle shell, a silencer body, an arc-shaped silencer cavity, and a silencer structure. It effectively suppresses airflow by using sound-absorbing cotton and perforated plate structure, and silences the airflow during turning through the silencer body and the arc-shaped silencer cavity.
It effectively suppresses noise when the airflow turns, avoids a reduction in air volume, and prevents noise from entering the downstream area, thus improving the noise reduction effect.
Smart Images
Figure CN223954363U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to air conditioning ventilation system silencing technical field, concretely is a kind of flow guide type silencing elbow. BACKGROUND
[0002] Silencing elbow is the component more common in air conditioning ventilation system, reduce the noise generated by disturbance when airflow turns by installing in the corner of ventilation duct, the existing silencing elbow is mostly improved on the basis of silencer, not only there is the problem of serious reduction of air volume, there is also the problem that wind noise generated by disturbance when airflow turns will enter downstream area with air pipe, it has certain influence on people's work or life. UTILITY MODEL CONTENTS
[0003] The utility model is directed to the above-mentioned shortage, provide a kind of flow guide type silencing elbow, both can avoid the problem of serious reduction of air volume, airflow when turning can be effectively inhibited, avoid wind noise with air pipe into downstream area.
[0004] In order to realize the above-mentioned purpose, the utility model has adopted the following technical scheme:
[0005] A kind of flow guide type silencing elbow, including right-angle shell, be set in the sound-absorbing body in the right-angle shell, the vertical part end of the right-angle shell is provided with the air inlet that is connected with the inside of right-angle shell, the horizontal part end of the right-angle shell is provided with the air outlet that is connected with the inside of right-angle shell, the middle part of the sound-absorbing body is provided with arc sound-absorbing cavity and sound-absorbing structure, the sound-absorbing structure is set on the outer circular arc surface of arc sound-absorbing cavity, one end of the arc sound-absorbing cavity is towards the air inlet setting, the other end of the arc sound-absorbing cavity is towards the air outlet setting.
[0006] Further, the arc sound-absorbing cavity is welded by front perforated plate, rear perforated plate, inner circular arc perforated plate, outer circular arc perforated plate, end head perforated plate one and end head perforated plate two, the arc sound-absorbing cavity is fixed in the right-angle shell by multiple support frames.
[0007] Further, the sound-absorbing structure includes a plurality of grooves opened in parallel on the sound-absorbing body, a separation piece is formed between adjacent grooves, a U-shaped perforated plate is arranged in the groove, and the opening end of the U-shaped perforated plate is fixed on the outer circular arc surface of the outer circular arc perforated plate.
[0008] Further, the opening of the groove is arranged towards the air inlet.
[0009] Further, the sound-absorbing body is made of sound-absorbing cotton.
[0010] Further, the outer side surface of the sound-absorbing body is attached to the inner side wall of the right-angle shell.
[0011] The utility model discloses the beneficial effect is:
[0012] In practical application, the airflow enters the inside of the right-angle shell through the air inlet, is effectively inhibited to the airflow when turning through the sound attenuation body, the arc sound attenuation cavity and the sound attenuation structure, prevents the noise from being generated in the disturbance in the turning process, and the airflow after turning is discharged through the air outlet, the utility model discloses can avoid the problem that the air volume is seriously reduced, can also effectively inhibit the airflow when turning, and avoid the wind noise with the wind pipe into the downstream area. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is the top view of the utility model discloses;
[0014] Figure 2 It is Figure 1 the sectional view of A-A in;
[0015] Reference signs: right-angle shell 1;Air inlet 11;Air outlet 12;Sound attenuation body 2;Rear perforated plate 31;Inner arc perforated plate 32;Outer arc perforated plate 33;End perforated plate one 34;End perforated plate two 35;Groove 41;Partition sheet 42;U-shaped perforated plate 43. DETAILED DESCRIPTION
[0016] As Figure 1 And Figure 2 shown, a flow guide type sound attenuation elbow, including right-angle shell 1, be set up in the sound attenuation body 2 of right-angle shell 1, the vertical portion end of right-angle shell 1 is provided with the air inlet 11 that communicates the inside of right-angle shell 1, the horizontal portion end of right-angle shell 1 is provided with the air outlet 12 that communicates the inside of right-angle shell 1, the middle part of sound attenuation body 2 is provided with arc sound attenuation cavity and sound attenuation structure, the sound attenuation structure is set up on the outer arc surface of arc sound attenuation cavity, one end of arc sound attenuation cavity is towards the air inlet 11 setting, the other end of arc sound attenuation cavity is towards the air outlet 12 setting.
[0017] When using, the airflow enters the inside of right-angle shell 1 through air inlet 11, is effectively inhibited to the airflow when turning through sound attenuation body 2, arc sound attenuation cavity and sound attenuation structure, prevents the noise from being generated in the disturbance in the turning process, and the airflow after turning is discharged through air outlet 12, the utility model discloses can avoid the problem that the air volume is seriously reduced, can also effectively inhibit the airflow when turning, and avoid the wind noise with the wind pipe into the downstream area.
[0018] As Figure 1 And Figure 2As shown in the drawings, the arc-shaped sound-absorbing cavity is welded by the front perforated plate, the rear perforated plate 31, the inner arc perforated plate 32, the outer arc perforated plate 33, the end perforated plate one 34 and the end perforated plate two 35, and the arc-shaped sound-absorbing cavity is fixed in the right-angle shell 1 by a plurality of support frames; in this embodiment, the plurality of arc-shaped sound-absorbing cavities formed by the front perforated plate, the rear perforated plate 31, the inner arc perforated plate 32, the outer arc perforated plate 33, the end perforated plate one 34 and the end perforated plate two 35 can make part of the noise in the airflow reflect in the arc-shaped sound-absorbing cavity, and consume and absorb the sound energy.
[0019] As shown in the drawings, Figure 1 and Figure 2 As shown in the drawings, the sound-absorbing structure comprises a plurality of grooves 41 which are parallelly formed on the sound-absorbing body 2, and a partition piece 42 is formed between adjacent grooves 41, and a U-shaped perforated plate 43 is arranged in the groove 41, and the opening end of the U-shaped perforated plate 43 is fixed on the outer arc surface of the outer arc perforated plate 33; in this embodiment, part of the low-frequency noise enters the groove 41 during the turning of the airflow in the arc-shaped sound-absorbing cavity, and the U-shaped perforated plate 43 and the sound-absorbing body 2 are combined to perform impedance composite sound absorption on the sound noise, thereby further improving the sound-absorbing effect of the sound-absorbing elbow.
[0020] As shown in the drawings, Figure 1 and Figure 2 As shown in the drawings, the opening of the groove 41 is arranged towards the air inlet 11; in this embodiment, when the opening of the groove 41 is arranged towards the air inlet 11, the low-frequency noise is more likely to enter the groove 41.
[0021] As shown in the drawings, Figure 1 and Figure 2 As shown in the drawings, the sound-absorbing body 2 is made of sound-absorbing cotton; in this embodiment, after the sound wave enters the sound-absorbing body 2 made of sound-absorbing cotton, the sound wave is resisted by the internal pores of the sound-absorbing cotton, and multiple reflections and refractions are generated in the sound-absorbing cotton, thereby consuming the sound wave energy and absorbing the noise in the airflow.
[0022] As shown in the drawings, Figure 1 and Figure 2 As shown in the drawings, the outer side surface of the sound-absorbing body 2 is attached to the inner side wall of the right-angle shell 1; in this embodiment, when the outer side surface of the sound-absorbing body 2 is attached to the inner side wall of the right-angle shell 1, the wind noise entering the right-angle shell 1 can be reduced, and the sound-absorbing effect is better.
[0023] The specific embodiments described herein are merely illustrative of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways without departing from the scope defined by the present application.
Claims
1. A flow-guiding muffler elbow, characterized by: The sound absorbing device comprises a right-angled shell, a sound absorbing body arranged in the right-angled shell, an air inlet arranged at the end of the vertical part of the right-angled shell and communicating with the inside of the right-angled shell, an air outlet arranged at the end of the horizontal part of the right-angled shell and communicating with the inside of the right-angled shell, a circular-arc sound absorbing cavity and a sound absorbing structure arranged in the middle part of the sound absorbing body, the sound absorbing structure being arranged on the outer circular-arc surface of the circular-arc sound absorbing cavity, one end of the circular-arc sound absorbing cavity being arranged towards the air inlet, and the other end of the circular-arc sound absorbing cavity being arranged towards the air outlet.
2. A flow-guiding type muffler elbow according to claim 1, wherein The circular-arc sound absorbing cavity is composed of a front perforated plate, a rear perforated plate, an inner circular-arc perforated plate, an outer circular-arc perforated plate, an end perforated plate one and an end perforated plate two, and is fixed in the right-angled shell by a plurality of supporting frames.
3. A flow-guiding sound attenuation elbow according to claim 2, characterized in that The sound absorbing structure comprises a plurality of grooves arranged in parallel on the sound absorbing body, a partition plate arranged between adjacent grooves, and a U-shaped perforated plate arranged in the groove.
4. A flow-guiding type muffler elbow according to claim 3, wherein The opening of the groove is arranged towards the air inlet.
5. A flow-guiding type muffler elbow according to claim 3, wherein The sound absorbing body is made of sound absorbing cotton.
6. A flow-guiding sound attenuation elbow according to claim 1, characterized in that The outer side surface of the sound absorbing body is attached to the inner side wall of the right-angled shell.