CN223954363U

CN223954363U - Diversion type silencing elbow

Info

Publication number: CN223954363U
Application number: CN202520358452.0U
Authority: CN
Inventors: 张玉麟; 张荷玲
Original assignee: Beijing Wanxunda Acoustics Equipment Co ltd
Current assignee: Beijing Wanxunda Acoustics Equipment Co ltd
Priority date: 2025-03-04
Filing date: 2025-03-04
Publication date: 2026-02-27
Anticipated expiration: 2035-03-04

Abstract

This utility model relates to the field of noise reduction technology for air conditioning and ventilation systems, specifically a flow-guiding noise reduction elbow, comprising a right-angled outer shell, a noise reduction body disposed within the right-angled outer shell, an air inlet communicating with the interior of the right-angled outer shell at its vertical end, and an air outlet communicating with the interior of the right-angled outer shell at its horizontal end. The noise reduction body has an arc-shaped noise reduction cavity and a noise reduction structure in its middle section, with the noise reduction structure disposed on the outer arc surface of the arc-shaped noise reduction cavity. One end of the arc-shaped noise reduction cavity faces the air inlet, and the other end faces the air outlet. This utility model can avoid the problem of severely reduced airflow and effectively suppress airflow during bends, preventing wind noise from entering the downstream area with the duct.

Description

Diversion type silencing elbow

Technical Field

The utility model relates to the technical field of noise elimination of an air conditioner ventilation system, in particular to a diversion type noise elimination elbow.

Background

The noise elimination elbow is a common component in an air conditioning ventilation system, reduces noise generated by disturbance when an air flow turns through being installed at the corner of a ventilation pipeline, is mainly formed by improving on the basis of a silencer, has the problem that the air quantity is seriously reduced, and also has the problem that wind noise generated by disturbance when the air flow turns enters a downstream area along with a wind pipe, so that the noise elimination elbow has a certain influence on work or life of people.

Disclosure of utility model

The utility model aims to overcome the defects, and provides the diversion type silencing elbow, which can not only avoid the problem of serious reduction of air quantity, but also effectively inhibit air flow during turning and prevent wind noise from entering a downstream area along with a wind pipe.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The utility model provides a water conservancy diversion formula noise elimination elbow, includes right angle shell, set up in the amortization body in the right angle shell, the vertical portion tip of right angle shell is provided with the inside air intake of intercommunication right angle shell, the horizontal portion tip of right angle shell is provided with the inside air outlet of intercommunication right angle shell, the middle part of amortization body is provided with convex amortization cavity and amortization structure, amortization structure sets up on the outer arc face of convex amortization cavity, the one end orientation of convex amortization cavity the air intake sets up, the other end orientation of convex amortization cavity the air outlet sets up.

Further, the arc-shaped silencing cavity is formed by welding a front-side perforated plate, a rear-side perforated plate, an inner arc-shaped perforated plate, an outer arc-shaped perforated plate, a first end perforated plate and a second end perforated plate, and is fixed in the right-angle shell through a plurality of supporting frames.

Further, the amortization structure is including parallel seting up a plurality of recesses on the amortization body, adjacent form the spacer between the recess, be provided with U-shaped perforated plate in the recess, the open end of U-shaped perforated plate is fixed on the outer arc surface of outer arc perforated plate.

Further, the opening of the groove is arranged towards the air inlet.

Further, the sound deadening body is made of sound absorbing cotton.

Further, the lateral surface of amortization body is laminated with the inside wall of right angle shell.

The beneficial effects of the utility model are as follows:

In practical application, the air flow enters the right-angle shell through the air inlet, the air flow during turning is effectively restrained through the silencing body, the circular arc-shaped silencing cavity and the silencing structure, noise is prevented from being generated by disturbance in the turning process, the turned air flow is discharged through the air outlet, the problem that the air quantity is seriously reduced can be avoided, the air flow during turning can be effectively restrained, and the air noise is prevented from entering a downstream area along with the air pipe.

Drawings

FIG. 1 is a top view of the present utility model;

FIG. 2 is a cross-sectional view at A-A in FIG. 1;

Reference numerals are right-angle casing 1, air inlet 11, air outlet 12, muffler 2, rear perforated plate 31, inner circular perforated plate 32, outer circular perforated plate 33, first end perforated plate 34, second end perforated plate 35, groove 41, and partition plate 42, and U-shaped perforated plate 43.

Detailed Description

As shown in fig. 1 and 2, a diversion type silencing elbow comprises a right-angle casing 1, a silencing body 2 arranged in the right-angle casing 1, an air inlet 11 communicated with the inside of the right-angle casing 1 is arranged at the end part of the vertical part of the right-angle casing 1, an air outlet 12 communicated with the inside of the right-angle casing 1 is arranged at the end part of the transverse part of the right-angle casing 1, a circular arc silencing cavity and a silencing structure are arranged in the middle of the silencing body 2, the silencing structure is arranged on the outer arc surface of the circular arc silencing cavity, one end of the circular arc silencing cavity faces towards the air inlet 11, and the other end of the circular arc silencing cavity faces towards the air outlet 12.

When the air flow enters the right-angle shell 1 through the air inlet 11, the air flow during turning is effectively restrained through the silencing body 2, the circular arc-shaped silencing cavity and the silencing structure, noise is prevented from being generated by disturbance in the turning process, the turned air flow is discharged through the air outlet 12, the problem that the air quantity is seriously reduced can be avoided, the air flow during turning can be effectively restrained, and the air noise is prevented from entering a downstream area along with the air pipe.

In this embodiment, a plurality of arc-shaped silencing cavities formed by welding the front side perforated plate, the rear side perforated plate 31, the inner arc perforated plate 32, the outer arc perforated plate 33, the first end perforated plate 34 and the second end perforated plate 35 enable part of noise in the airflow to be reflected in the arc-shaped silencing cavities, and consume and absorb sound energy.

In this embodiment, in the process of turning the air flow in the arc-shaped silencing cavity, part of low-frequency noise enters the groove 41, and impedance composite sound absorption is performed on the noise through the combination of the U-shaped perforated plate 43 and the silencing body 2, so that the silencing effect of the silencing elbow is further improved.

As shown in fig. 1 and 2, the opening of the groove 41 is disposed towards the air inlet 11, and in this embodiment, when the opening of the groove 41 is disposed towards the air inlet 11, low-frequency noise is more likely to enter the groove 41.

As shown in fig. 1 and 2, the sound deadening body 2 is made of sound absorbing cotton, in this embodiment, after sound waves enter the sound deadening body 2 made of sound absorbing cotton, the sound waves are subjected to resistance of the internal pores of the sound absorbing cotton, and multiple reflection and refraction are generated in the sound absorbing cotton, so that the energy of sound waves is consumed, and noise in the air flow is absorbed.

In this embodiment, when the outer side surface of the silencing body 2 is attached to the inner side wall of the right-angle housing 1, wind noise entering the right-angle housing 1 can be reduced, and the silencing effect is better.

The specific embodiments described herein are offered by way of example only. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the scope of the utility model as defined.

Claims

1. The flow-guiding type silencing elbow is characterized by comprising a right-angle shell, wherein a silencing body is arranged in the right-angle shell, an air inlet communicated with the inside of the right-angle shell is formed in the end part of the vertical part of the right-angle shell, an air outlet communicated with the inside of the right-angle shell is formed in the end part of the transverse part of the right-angle shell, an arc-shaped silencing cavity and a silencing structure are arranged in the middle of the silencing body, the silencing structure is arranged on the outer arc surface of the arc-shaped silencing cavity, one end of the arc-shaped silencing cavity is arranged towards the air inlet, and the other end of the arc-shaped silencing cavity is arranged towards the air outlet.

2. The flow-guiding silencing elbow according to claim 1, wherein the circular arc silencing cavity is formed by welding a front perforated plate, a rear perforated plate, an inner circular arc perforated plate, an outer circular arc perforated plate, a first end perforated plate and a second end perforated plate, and is fixed in the right-angle casing through a plurality of supporting frames.

3. The diversion-type silencing elbow according to claim 2, wherein the silencing structure comprises a plurality of grooves which are formed in parallel on the silencing body, separation sheets are formed between adjacent grooves, a U-shaped perforated plate is arranged in each groove, and the open end of the U-shaped perforated plate is fixed on the outer arc surface of the outer arc perforated plate.

4. A flow-directing muffler elbow as defined in claim 3, wherein the opening of the recess is disposed toward the inlet.

5. A flow-directing muffler elbow as defined in claim 3, wherein said muffler body is made of sound absorbing cotton.

6. The flow-directing muffler elbow as defined in claim 1, wherein the outer side of the muffler body is attached to the inner side wall of the right angle housing.