CN211455287U

CN211455287U - Labyrinth silencer

Info

Publication number: CN211455287U
Application number: CN201922191827.6U
Authority: CN
Inventors: 张玉麟; 张玉敏; 李双成
Original assignee: Beijing Wanxunda Acoustics Equipment Co ltd
Current assignee: Beijing Wanxunda Acoustics Equipment Co ltd
Priority date: 2019-12-07
Filing date: 2019-12-07
Publication date: 2020-09-08
Anticipated expiration: 2029-12-07

Abstract

The utility model relates to a labyrinth silencer, including the casing, the casing is the cavity cube, and the casing is seal structure, and inclosed air inlet chamber and air-out chamber are separated into through the acoustical panel to the casing, and the casing front panel is close to air inlet chamber one side and is equipped with the air intake, and the panel is close to air-out chamber one side and is equipped with the air outlet under the casing, and the acoustical panel keeps away from air intake one end and is equipped with the wind channel opening that feeds through air inlet chamber and air-out chamber. The utility model discloses have good noise cancelling effect, rational in infrastructure, manufacturing cost is lower, can realize functions such as turning, the reducing of air current.

Description

Labyrinth silencer

Technical Field

The utility model belongs to the technical field of ventilation air conditioner technique and specifically relates to a labyrinth silencer is related to.

Background

Silencers are devices which allow air flow therethrough but prevent or reduce sound transmission, by eliminating aerodynamic forces

An important measure of force noise.

Most of the existing silencers are sheet-type, when air flow flows between the silencing sheets, the silencing sheets absorb noise propagated along with the air flow, and the air duct flow area is reduced due to the silencing sheets, so that air resistance of the air duct is increased in detail, and the energy consumption of the fan is increased.

Under some working conditions, the silencer needs air inlet and air exhaust not in the same direction, and a common silencer only has a silencing function and cannot perform air flow reversing, so that the silencer is single in function and limited in application range.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a labyrinth silencer, this silencer has good noise cancelling effect, and is rational in infrastructure, and low in manufacturing cost can realize functions such as turning, the reducing of air current.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model relates to a labyrinth silencer, which comprises a housin, the casing is the cavity cube, the casing is seal structure, inclosed air inlet chamber and air-out chamber are separated into through the acoustical panel to the casing, the casing front panel is close to air inlet chamber one side and is equipped with the air intake, the casing lower panel is close to air-out chamber one side and is equipped with the air outlet, the acoustical panel is kept away from the wind channel opening that air intake one end was equipped with intercommunication air inlet chamber and air-out chamber.

Through adopting above-mentioned technical scheme, set up the acoustical panel in the casing, the wind that gets into from the air intake is followed the air inlet chamber and is passed through the wind channel opening and reentrant air outlet chamber and discharge from the air outlet, and this acoustical panel has prolonged the propagation route of noise, and the acoustical panel can avoid the sound short circuit condition of direct sound to take place to effectively promote noise elimination performance.

The present invention in a preferred example may be further configured to: the acoustical panel is parallel to the side panel of the shell.

Through adopting above-mentioned technical scheme, the acoustical panel that sets up and parallel with casing side panel can ensure that the wind that gets into the air inlet intracavity flows gently, noise reduction.

The present invention in a preferred example may be further configured to: the air outlet 4 is close to the front panel of the shell 1.

Through adopting above-mentioned technical scheme, set up the air outlet and be close to casing front panel, prolong the propagation path of noise as far as possible, reach better noise elimination effect.

The present invention in a preferred example may be further configured to: the length of the sound-absorbing plate is 3/5-4/5 of the length of the air inlet cavity.

By adopting the technical scheme, the length of the silencing plate is set to be 3/5-4/5 of the length of the air inlet cavity, so that a longer air supply channel can be ensured, air flow can be turned at the opening of the air channel to enter the air outlet cavity, and a better silencing effect is achieved.

The present invention in a preferred example may be further configured to: the sound-absorbing plate comprises two parallel side plates, one ends of the two side plates, which are close to the opening of the air duct, are connected through a connecting plate, sound-absorbing filler is filled between the two side plates, and a plurality of sound-absorbing holes are formed in the side plates.

Through adopting above-mentioned technical scheme, wind makes sound absorbed by inhaling the sound filler absorption through inhaling the sound hole after getting into the air inlet chamber to reach better sound effect of inhaling.

The present invention in a preferred example may be further configured to: the connecting plate is in an arc shape extending outwards.

By adopting the technical scheme, when sound passes through the opening of the air duct, the connecting plate is arc-shaped, so that the resistance of the air can be reduced, the flow of the air is facilitated, and the resistance damage of the silencer is reduced.

The present invention in a preferred example may be further configured to: the sound-absorbing filler is centrifugal glass wool.

By adopting the technical scheme, the centrifugal glass wool has the advantages of good molding, small volume density, thermal conductivity, heat preservation and insulation, good sound absorption performance, corrosion resistance and stable chemical performance.

The present invention in a preferred example may be further configured to: the inner side of the shell is laid with sound absorption cotton.

Through adopting above-mentioned technical scheme, can further absorb the sound in the casing of flowing through, reach better sound effect of inhaling.

The present invention in a preferred example may be further configured to: and the air inlet and the air outlet are respectively connected with a flange.

By adopting the technical scheme, the silencer can be connected with a pipeline through the flange, and the smoothness of wind flowing is ensured.

The present invention in a preferred example may be further configured to: the sound-absorbing cotton is laid on the outer side of the shell, and a plurality of sound-absorbing holes are formed in the shell.

By adopting the technical scheme, the noise generated by the air flow entering from the air inlet cavity can be absorbed by the sound-absorbing cotton laid outside the shell through the sound-absorbing hole on the shell, so that a better sound-absorbing effect can be achieved.

To sum up, the utility model discloses a following at least one useful technological effect:

1. through set up the acoustical panel in the casing, make the wind that gets into in the casing flow through air intake, air inlet chamber, wind channel opening, air-out chamber and air outlet, increased the flow path of air current to the acoustical panel still avoids the sound short circuit condition of direct sound to take place, this rational in infrastructure, noise cancelling effect obvious, use simple and convenient, the cost is lower.

2. The air inlet and the air outlet are arranged at positions far away from each other, so that the propagation path of sound is prolonged, and a better sound absorption effect is achieved.

3. The end part of the silencing plate is provided with the arc-shaped connecting plate, so that the wind resistance of the silencer can be reduced, the flowing of air flow is facilitated, and the resistance of the silencer is reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a view in the direction A of FIG. 1;

FIG. 3 is a cross-sectional view B-B of FIG. 1;

fig. 4 is a schematic diagram of the structure of the silencer of the present invention.

In the figure, 1, a housing; 12. an air inlet cavity; 13. an air outlet cavity; 2. a sound-absorbing panel; 21. a side plate; 22. a connecting plate; 23. a sound absorption hole; 3. an air inlet; 4. an air outlet; 5. an air duct opening; 6. and (4) a flange.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1-4, the labyrinth muffler of the present invention comprises a housing 1, wherein the housing 1 is a hollow cube, the housing 1 is a sealed structure, the housing 1 is divided into a closed air inlet cavity 12 and an air outlet cavity 13 by a muffler plate 2, an air inlet 3 is arranged on one side of a front panel of the housing 1 close to the air inlet cavity 12, an air outlet 4 is arranged on one side of a lower panel of the housing 1 close to the air outlet cavity 13, and an air duct opening 5 communicating the air inlet cavity 12 and the air outlet cavity 13 is arranged on one end of the muffler plate 2 far away from the air inlet 3.

The silencing plate 2 is arranged in the shell 1, wind entering from the air inlet 3 enters the air outlet cavity 13 along the air inlet cavity 12 through the air duct opening 5 and then is discharged from the air outlet 4, the silencing plate 2 prolongs the propagation path of noise, and the silencing plate 2 can avoid the occurrence of sound short circuit of direct sound, so that the silencing performance is effectively improved.

The sound-absorbing plate 2 is parallel to the side panel of the shell 1.

The silencing plate 2 parallel to the side panel of the shell 1 is arranged, so that the smooth flow of air flow entering the air inlet cavity 12 can be ensured, and the noise is reduced.

The air outlet 4 is close to the front panel of the shell 1. The air outlet 4 is arranged close to the front panel of the shell 1, so that the propagation path of noise is prolonged as far as possible, and a better noise elimination effect is achieved.

The length of the sound-absorbing board 2 is 3/5-4/5 of the length of the air inlet chamber 12.

The length of the silencing board 2 is set to be 3/5-4/5 of the length of the air inlet cavity 12, so that a longer air flow channel can be ensured, a better silencing effect is achieved, and air flow can be turned at the air channel opening 5 and enters the air outlet cavity 13.

As shown in fig. 4, the sound-absorbing plate 2 includes two parallel side plates 21, one ends of the two side plates 21 close to the air duct opening 5 are connected by a connecting plate 22, sound-absorbing filler is filled between the two side plates 21, and a plurality of sound-absorbing holes 23 are formed in the side plates 21.

The air current makes the noise absorbed by the sound absorbing filler through the sound absorbing hole 23 in entering the air inlet chamber 12, thereby achieving better sound absorbing effect.

The web 22 is arc-shaped extending outwardly.

When sound passes through the air duct opening 5, the connecting plate 22 is arc-shaped, so that the resistance of air flow can be reduced, the air flow can flow favorably, and the wind resistance of the silencer can be reduced.

The sound-absorbing filler is centrifugal glass wool.

The centrifugal glass wool has the advantages of good molding, small volume density, thermal conductivity , heat preservation and insulation, good sound absorption performance, corrosion resistance and stable chemical performance.

The inner side of the shell 1 is laid with sound absorption cotton which can absorb the noise flowing through the shell 1. The noise generated by the air flow entering from the air inlet cavity 12 can be absorbed by the sound absorption cotton laid outside the shell 1 through the sound absorption hole on the shell 1, so that a better sound absorption effect can be achieved.

The air inlet 3 and the air outlet 4 are respectively connected with a flange 6, and the silencer is connected with a pipeline through the flanges 6, so that smoothness of air flow is guaranteed.

The sound absorption cotton is laid on the outer side of the shell 1, and the shell 1 is provided with a plurality of sound absorption holes 23, so that the structure can further absorb noise.

The implementation principle of the embodiment is as follows: the structure prolongs the propagation path of the airflow, so that the noise can be absorbed more, a better sound absorption effect is achieved, and the sound absorption plate 2 can also avoid the occurrence of sound short circuit of direct sound; meanwhile, the air inlet 3 is located in the air inlet cavity 12, the air outlet 4 is located in the air outlet cavity 13, and the air inlet and the air outlet are located in different directions, so that functions of air flow steering, diameter changing and the like can be achieved, and requirements under different working conditions are met.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A labyrinth silencer, comprising a housing (1), characterized in that: casing (1) is the cavity cube, casing (1) is seal structure, inclosed air inlet chamber (12) and air-out chamber (13) are separated into through acoustical panel (2) in casing (1), casing (1) front panel is close to air inlet chamber (12) one side and is equipped with air intake (3), the panel is close to air-out chamber (13) one side and is equipped with air outlet (4) under casing (1), acoustical panel (2) are kept away from air intake (3) one end and are equipped with wind channel opening (5) that communicate air inlet chamber (12) and air-out chamber (13).

2. The labyrinth muffler of claim 1, wherein: the sound-absorbing plate (2) is parallel to the side panel of the shell (1).

3. The labyrinth muffler according to claim 1 or 2, characterized in that: the length of the sound-deadening plate (2) is 3/5-4/5 of the length of the air inlet cavity (12).

4. The labyrinth muffler of claim 1, wherein: the air outlet (4) is close to the front panel of the shell (1).

5. The labyrinth muffler of claim 1, wherein: the sound-absorbing plate (2) comprises two parallel side plates (21), one end, close to the air duct opening (5), of each side plate (21) is connected through a connecting plate (22), sound-absorbing fillers are filled between the side plates (21), and a plurality of sound-absorbing holes (23) are formed in the side plates (21).

6. The labyrinth muffler of claim 5, wherein: the connecting plate (22) is in an arc shape extending outwards.

7. The labyrinth muffler of claim 5, wherein: the sound-absorbing filler is centrifugal glass wool.

8. The labyrinth muffler of claim 1, wherein: the inner side of the shell (1) is laid with sound-absorbing cotton.

9. The labyrinth muffler of claim 1, wherein: and the air inlet (3) and the air outlet (4) are respectively connected with a flange (6).

10. The labyrinth muffler of claim 1, wherein: the sound-absorbing cotton is laid on the outer side of the shell (1), and a plurality of sound-absorbing holes (23) are formed in the shell (1).