CN219062088U - Noise reduction device of exhaust fan - Google Patents

Abstract

The utility model relates to the technical field of noise reduction, in particular to a noise reduction device of an exhaust fan, which comprises: the base, the base top is provided with first box and second box, and first box and second box are made by the acoustical panel, and the second box is in first box inside, and has reserved the clearance between first box and the second box, the clearance intussuseption is filled with first soundproof cotton; the air inlet pipe is connected with the air inlet pipe through a connecting piece, and the air inlet pipe is connected with the air inlet pipe through a connecting piece; the four silencer pipes are respectively arranged on the two exhaust pipes and the inner side walls of the two air inlet pipes, and the noise reduction device can realize the noise reduction effect to the greatest extent when the axial flow fan and the exhaust fan work by arranging the box body, the soundproof cotton, the silencer pipes and other parts.

Description

Noise reduction device of exhaust fan

Technical Field

The utility model relates to the technical field of noise reduction, in particular to a noise reduction device of an exhaust fan.

Background

The exhaust fan is in order to discharge indoor air outdoors, causes indoor negative pressure, and then discharges indoor harmful gas outdoors, because exhaust fan's theory of operation mostly utilizes centrifugal force with gas compression, parts such as axial fan's impeller can high-speed rotation, and then produce the noise, and the noise can influence people's normal life and production work, just needs an exhaust fan amortization noise reduction device.

In the prior art, when making an uproar to exhaust fan, generally adopt sealed form, seal exhaust fan, and then realize noise reduction effect, but exhaust fan during operation can produce heat unable discharge, can lead to exhaust fan damage in summer, and when the air current passes through the air-supply line and goes out the tuber pipe, also can produce great noise, leads to noise reduction effect not good.

Disclosure of Invention

The utility model aims to provide a silencing and noise-reducing device of an exhaust fan, which aims to solve the problems in the prior art.

The technical scheme of the utility model is as follows: an exhaust fan silencing and noise reducing device, comprising:

the base, the base top is provided with first box and second box, and first box and second box are made by the acoustical panel, and the second box is in first box inside, and has reserved the clearance between first box and the second box, the clearance intussuseption is filled with first soundproof cotton;

the air inlet pipe is connected with the air inlet pipe through a connecting piece, and the air inlet pipe is connected with the air inlet pipe through a connecting piece;

the four silencing pipes are respectively arranged on the two exhaust pipes and the inner side walls of the two air inlet pipes;

and the exhaust assembly is arranged at the top of the base.

Preferably, the method further comprises:

the plurality of conical grooves are formed in the inner side wall of the silencing pipe at equal intervals;

the cavity is arranged inside the silencing pipe.

Preferably, the method further comprises:

the second soundproof cotton is annular and equidistantly distributed on the inner side wall of the cavity, and two adjacent second soundproof cotton are in contact with each other.

Preferably, the second soundproof cotton is of a triangular prism structure.

Preferably, the mounting assembly comprises:

the rubber air bag is arranged on the mounting frame;

the connecting pipe is arranged on the rubber air bag and is communicated with the rubber air bag;

and the one-way valve is arranged at one end of the connecting pipe.

Preferably, the exhaust assembly includes:

the axial flow fan is arranged on the inner side wall of the second box body;

the exhaust fan, exhaust fan bottom is provided with the mount, the mount bottom is provided with the rubber pad, and the rubber pad is fixed on the base.

Preferably, one of the exhaust pipes is arranged at an air outlet of the exhaust fan, the other exhaust pipe is arranged at an air outlet of the axial flow fan, one of the air inlet pipes is arranged at an air inlet of the exhaust fan, and the other air inlet pipe is arranged on the second box body in a penetrating manner.

Compared with the prior art, the utility model provides the silencing and noise reducing device of the exhaust fan by improvement, which has the following improvements and advantages:

according to the utility model, through the arranged silencing pipe, the exhaust pipe, the air inlet pipe, the first box body, the second box body and the first soundproof cotton, when the noise reduction device is used, three layers of silencing effects can be formed through the first box body, the second box body and the soundproof cotton between the first box body and the second box body, so that noise generated when the axial flow fan and the exhaust fan work is greatly reduced and transmitted to the outside of the first box body, and in addition, through the arranged silencing pipe and the silencing part in the silencing pipe, noise generated by rotation of the fan impeller is greatly reduced and transmitted to the outside of the air pipe, and the noise reduction device can realize the maximum noise reduction effect.

Drawings

The utility model is further explained below with reference to the drawings and examples:

FIG. 1 is a schematic elevational cross-sectional view of the present utility model;

FIG. 2 is a schematic side cross-sectional view of the present utility model;

FIG. 3 is a schematic top cross-sectional view of the present utility model;

FIG. 4 is a schematic view of the structure of the silencing air duct of the present utility model;

FIG. 5 is a schematic view of the explosive structure of the rubber bladder and mount of the present utility model;

fig. 6 is a schematic view of a partially enlarged structure at a in fig. 5 according to the present utility model.

Reference numerals illustrate:

1. a first case; 2. a second case; 3. a first soundproof cotton; 4. an axial flow fan; 5. an exhaust fan; 6. a fixing frame; 7. a rubber pad; 8. an exhaust pipe; 9. an air inlet pipe; 10. a rubber air bag; 11. a connecting pipe; 12. a one-way valve; 13. a mounting frame; 14. a muffler pipe; 15. a conical groove; 16. a second soundproof cotton; 17. and (5) a base.

Detailed Description

The following detailed description of the present utility model clearly and fully describes the technical solutions of the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model provides a silencing and noise reducing device of an exhaust fan through improvement, which comprises the following technical scheme:

as shown in fig. 1 to 6, an exhaust fan silencing and noise reducing device includes:

the base 17, the top of the base 17 is provided with a first box body 1 and a second box body 2, the first box body 1 and the second box body 2 are made of sound-deadening plates, the second box body 2 is positioned in the first box body 1, a gap is reserved between the first box body 1 and the second box body 2, and the gap is filled with first soundproof cotton 3;

the two exhaust pipes 8 and the two air inlet pipes 9 are respectively provided with a mounting frame 13 on the outer side walls of the two exhaust pipes 8 and the two air inlet pipes 9, and the four mounting frames 13 are respectively provided with a mounting assembly;

four silencing pipes 14, wherein the four silencing pipes 14 are respectively arranged on the inner side walls of the two exhaust pipes 8 and the two air inlet pipes 9;

and the exhaust assembly is arranged on the top of the base 17.

Through first box 1 and second box 2 and the first soundproof cotton 3 between the box, form three-layer amortization effect, reduce the noise conduction that axial fan 4 and exhaust fan 5 during operation produced outside first box 1, realize good noise reduction effect.

Further, the method further comprises the following steps:

the plurality of conical grooves 15 are formed in the inner side wall of the silencing pipe 14 at equal intervals;

a cavity which is arranged inside the silencing pipe 14;

the second soundproof cotton 16 is distributed on the inner side wall of the cavity at equal intervals in an annular shape, two adjacent second soundproof cotton 16 are in contact with each other, and the second soundproof cotton 16 is of a triangular prism structure.

Through the conical groove 15 on the silencer pipe 14, the sound wave is collected through the groove of the conical structure, and the sound wave is continuously turned back in the conical groove 15, so that the energy of the sound wave is reduced, the partial noise reduction effect is achieved, the sound wave passing through the conical groove 15 is absorbed again through the second soundproof cotton 16 of the triangular structure, and the noise transmission of the exhaust pipe 8 and the air inlet pipe 9 is greatly reduced.

Further, the mounting assembly includes:

a rubber bladder 10, the rubber bladder 10 being disposed on the mounting bracket 13;

a connection pipe 11, the connection pipe 11 being provided on the rubber bladder 10, and the connection pipe 11 being communicated with the rubber bladder 10;

a check valve 12, the check valve 12 is arranged at one end of the connecting pipe 11.

Two exhaust pipes 8 and two air inlet pipes 9 are arranged on the first box body 1 and the second box body 2 through a mounting frame 13, then air is injected into a connecting pipe 11 through a one-way valve 12, a rubber air bag 10 is inflated through the connecting pipe 11, gaps between the mounting frame 13 and the first box body 1 and the second box body 2 are filled, and noise overflow caused by the gaps is reduced.

Further, the exhaust assembly includes:

the axial flow fan 4 is arranged on the inner side wall of the second box body 2;

the exhaust fan 5, exhaust fan 5 bottom is provided with mount 6, and mount 6 bottom is provided with rubber pad 7, and rubber pad 7 is fixed on base 17.

In the working process of the exhaust fan 5, the noise generated by shaking of the exhaust fan 5 during working is reduced through the fixing frame 6 and the rubber pad 7 below the exhaust fan, and the noise is reduced.

Further, one of the exhaust pipes 8 is arranged at the air outlet of the exhaust fan 5, the other exhaust pipe 8 is arranged at the air outlet of the axial flow fan 4, one of the air inlet pipes 9 is arranged at the air inlet of the exhaust fan 5, and the other air inlet pipe 9 is arranged on the second box body 2 in a penetrating manner.

Specifically, the noise reduction principle of the noise reduction device is as follows: during the use, install two exhaust pipes 8 and two air-supply lines 9 on first box 1 and second box 2 through mounting bracket 13, then inject gas into connecting pipe 11 through check valve 12, make rubber gasbag 10 inflation through connecting pipe 11, all gaps between mounting bracket 13 and first box 1 and the second box 2 have been reduced here clearance and noise overflow that leads to, in the in-process of exhaust fan 5 work, through its below mount 6 and rubber pad 7, reduce the noise that exhaust fan 5 during operation rocked and produce, avoided the production of noise, through the first soundproof cotton 3 between first box 1 and the second box 2, prevent the noise conduction that axial fan 4 and exhaust fan 5 during operation produced outside first box 1, through the taper groove 15 on the muffler pipe 14, collect the ripples through the groove of taper structure, and make the ripples constantly turn back in taper groove 15, reduce the energy of ripples, reach the effect of making an uproar falls through the second cotton 16 of triangle-shaped structure, make the noise that makes through the big ripples that is absorbed by the taper groove 15 again to the exhaust fan 8 when the exhaust fan 5 during operation, the noise that makes the noise reduction fan makes the maximum degree of making an uproar is realized at the exhaust fan 5 and the exhaust fan 5 when the maximum degree of the exhaust fan is realized.

Claims (7)

1. An exhaust fan noise reduction device, characterized by comprising:

the sound insulation box comprises a base (17), wherein a first box body (1) and a second box body (2) are arranged at the top of the base (17), the first box body (1) and the second box body (2) are both made of sound insulation plates, the second box body (2) is positioned inside the first box body (1), a gap is reserved between the first box body (1) and the second box body (2), and first sound insulation cotton (3) is filled in the gap;

the air inlet and outlet device comprises two exhaust pipes (8) and two air inlet pipes (9), wherein mounting frames (13) are arranged on the outer side walls of the two exhaust pipes (8) and the two air inlet pipes (9), and mounting assemblies are arranged on the four mounting frames (13);

four silencing pipes (14), wherein the four silencing pipes (14) are respectively arranged on the inner side walls of the two exhaust pipes (8) and the two air inlet pipes (9);

and the exhaust assembly is arranged at the top of the base (17).

2. The exhaust fan silencing and noise reducing device according to claim 1, further comprising:

the plurality of conical grooves (15) are formed in the inner side wall of the silencing pipe (14) at equal intervals;

the cavity is arranged inside the silencing pipe (14).

3. The exhaust fan silencing and noise reducing device according to claim 2, further comprising:

the second soundproof cotton (16) is annularly distributed on the inner side wall of the cavity at equal distance, and two adjacent second soundproof cotton (16) are in contact with each other.

4. A muffler and noise reducer for an exhaust fan as defined in claim 3, wherein said second soundproofing cotton (16) is of triangular prism structure.

5. The exhaust fan silencing and noise reducing device of claim 1, wherein the mounting assembly comprises:

a rubber airbag (10), wherein the rubber airbag (10) is arranged on the mounting frame (13);

the connecting pipe (11) is arranged on the rubber air bag (10), and the connecting pipe (11) is communicated with the rubber air bag (10);

and the one-way valve (12), wherein the one-way valve (12) is arranged at one end of the connecting pipe (11).

6. The exhaust fan silencing and noise reducing device according to claim 1, wherein the exhaust assembly comprises:

the axial flow fan (4) is arranged on the inner side wall of the second box body (2);

the exhaust fan (5), exhaust fan (5) bottom is provided with mount (6), mount (6) bottom is provided with rubber pad (7), and rubber pad (7) are fixed on base (17).

7. The noise reduction device of an exhaust fan according to claim 1, wherein one of the exhaust pipes (8) is arranged at an air outlet of the exhaust fan (5), the other exhaust pipe (8) is arranged at an air outlet of the axial flow fan (4), one of the air inlet pipes (9) is arranged at an air inlet of the exhaust fan (5), and the other air inlet pipe (9) is arranged on the second box (2) in a penetrating manner.

Images