CN218993467U

CN218993467U - Noise reduction device and range hood with same

Info

Publication number: CN218993467U
Application number: CN202121805380.8U
Authority: CN
Inventors: 韩君庆; 潘叶江
Original assignee: Vatti Co Ltd
Current assignee: Vatti Co Ltd
Priority date: 2021-08-04
Filing date: 2021-08-04
Publication date: 2023-05-09
Anticipated expiration: 2031-08-04

Abstract

The utility model discloses a noise reduction device and a range hood with the same, wherein the noise reduction device comprises: the damping energy consumption module comprises a fixed seat and a motion energy consumption piece, wherein the fixed seat is provided with a plurality of through holes, the motion energy consumption piece which is matched with the fixed seat and can move is arranged in the through holes, the motion energy consumption piece is provided with a central hole for sound to pass through, and the motion energy consumption piece can move along the through holes under the action of sound waves. The utility model realizes the dissipation of the energy of sound waves through damping, remarkably reduces the noise of the smoke machine, improves the user experience degree and improves the competitive power of company products.

Description

Noise reduction device and range hood with same

Technical Field

The utility model relates to the technical field of range hoods, in particular to a noise reduction device and a range hood with the same.

Background

In recent years, the domestic smoke ventilator market always pushes the concept of large air quantity and large suction force, and along with the gradual increase of the air quantity, the noise generated by the smoke ventilator is also larger and larger. When the range hood is started, a kitchen operator cannot hear speaking sound, telephone sound, door ring sound and child sound, and even the strong noise generated by the operation of the range hood can cause adverse reactions such as dysphoria, headache, palpitation and the like to the kitchen operator, and the long-term use can cause serious influence on physical and mental health. Therefore, noise is a technical problem to be solved in the existing range hood.

Disclosure of Invention

The utility model aims to solve one of the problems existing in the related art to at least a certain extent, and therefore, the utility model provides the noise reduction device which is simple and ingenious in structure, can obviously reduce noise generated by the operation of the range hood, and improves the user experience.

The utility model also provides a range hood with the noise reduction device.

According to the noise reduction device, the following technical scheme is adopted:

a noise reduction device comprising a damping energy consumption module, the damping energy consumption module comprising: the fixing seat is provided with a plurality of through holes; the motion energy consumption piece is internally provided with the motion energy consumption piece which is matched with the through hole and can move, the motion energy consumption piece is provided with a central hole for sound to pass through, and the motion energy consumption piece can move along the through hole under the action of sound waves.

In some embodiments, a number of protrusions are provided on the inner and/or outer side walls of the motion consumers and/or a dissipative layer is provided between the motion consumers and the through holes.

In some embodiments, the plurality of vias includes a number of first vias and a number of second vias, the first vias having a larger pore size than the second vias.

In some embodiments, the fixing base is further provided with a plurality of silencing holes, all the silencing holes and all the through holes are respectively located on two opposite sides of the fixing base, or at least one silencing hole is arranged on the periphery of each through hole.

According to the above provided range hood, the following technical scheme is adopted:

a range hood, comprising: the box body is provided with an air inlet and a smoke outlet; the fan is arranged in the box body; the noise reduction device is arranged on the box body, and the central hole is communicated with the inside of the box body.

In some embodiments, an opening is provided in a side wall of the box, the opening being arranged towards an air inlet of the fan; the noise reduction device further comprises a shell arranged outside the box body, a sound channel is defined inside the shell or between the shell and the side wall of the box body, the sound channel is communicated with the opening, the fixing seat is arranged in the sound channel, and the motion energy dissipation parts are arranged along the sound propagation direction.

In some embodiments, the noise reduction device further comprises a noise reduction module disposed within the sound channel, and the noise reduction module covers the aperture.

In some embodiments, the sound channel is defined by the housing and a sidewall of the case, and the noise reduction module is bonded to the sidewall of the case and covers the opening.

In some embodiments, the noise reduction module includes a first flexible material layer and a second flexible material layer having different thicknesses, the first flexible material layer being bonded to an edge of the aperture and covering the aperture, the second flexible material layer being spaced apart or in abutment with the first flexible material layer.

In some embodiments, the noise reduction module further comprises a third layer of flexible material disposed between the first and second layers of flexible material, and the third layer of flexible material has a thickness that is less than the thickness of the second layer of flexible material and greater than the thickness of the first layer of flexible material.

Compared with the prior art, the utility model at least comprises the following beneficial effects:

1. according to the utility model, the fixed seat and the movable energy consumption piece are additionally arranged, the fixed seat is provided with the plurality of through holes, the movable energy consumption piece which is matched with the fixed seat is arranged in the through holes, and the movable energy consumption piece is provided with the central hole for sound to pass through;

2. the damping energy consumption module and the noise reduction module are matched in a cooperative manner, so that composite noise reduction is realized, and the noise of the smoke machine is further reduced.

Drawings

Fig. 1 is an exploded view of a range hood according to embodiment 1 of the present utility model;

fig. 2 is a sectional view of a range hood according to embodiment 1 of the present utility model;

FIG. 3 is an exploded view of the damping energy dissipation module and the housing of embodiment 1 of the present utility model;

FIG. 4 is a schematic structural view of a fixing base in embodiment 1 of the present utility model;

FIG. 5 is a schematic diagram of the structure of the motion energy dissipation member in embodiment 1 of the present utility model;

FIG. 6 is a sectional view showing a first structure of the fixing base in embodiment 2 of the present utility model;

fig. 7 is a sectional view showing a second structure of the fixing base in embodiment 2 of the present utility model.

In the figure: 1-a box body 1, 101-is provided with holes;

2-a fan;

3-damping energy consumption modules, 31-fixing seats, 311-through holes, 312-silencing holes 312, 32-motion energy consumption pieces, 321-central holes 321, 322-bulges;

4-a shell, 401-a sound channel, 402-a mounting port, 403-a sound outlet, 41-a first section, 42-a second section;

5-noise reduction module, 51-first flexible material layer, 52-second flexible material layer, 53-third flexible material layer.

Detailed Description

The following examples illustrate the utility model, but the utility model is not limited to these examples. Modifications and equivalents of some of the technical features of the specific embodiments of the present utility model may be made without departing from the spirit of the present utility model, and they are all included in the scope of the claimed utility model.

Example 1

As shown in fig. 1-2, the present embodiment provides a noise reduction device, which can be applied to a range hood, and the noise reduction device includes a damping energy consumption module 3, where the damping energy consumption module 3 includes a fixing seat 31 and a motion energy consumption member 32, the fixing seat 31 is provided with a plurality of through holes 311, the motion energy consumption member 32 adapted to the fixing seat and movable is provided in the through holes 311, the motion energy consumption member 32 has a central hole 321 for passing sound, and the motion energy consumption member 32 can move along the through holes 311 under the action of sound waves.

When the noise generated by the operation of the fan 32 of the range hood enters the central hole 32 of the damping energy consumption module 3, the energy of the sound wave can drive the motion energy consumption piece 32 to move along the through hole 311, so that the energy of the sound wave is consumed, the noise of the range hood is obviously reduced, the user experience is improved, and the product competitiveness of a company is improved.

It can be seen that, in this embodiment, by adding the fixing seat 31 and the motion energy dissipation member 32, the fixing seat 31 is provided with a plurality of through holes 311, the motion energy dissipation member 32 which is adapted to the through holes 311 and is movable is disposed in the through holes 311, the motion energy dissipation member 32 has a central hole 321 through which sound passes, and the structure is simple and smart, so that the energy of dissipating sound waves through damping can be realized, the noise of the smoke machine can be obviously reduced, the user experience is improved, and the product competitiveness of a company is improved.

As shown in fig. 3-4, the plurality of through holes 311 includes a plurality of first through holes and a plurality of second through holes, where the aperture of the first through hole is larger than that of the second through hole, so that the fixing seat 31 has at least two through holes with different apertures, corresponding to the through holes, the number of the motion energy dissipation members 32 is equal to that of the through holes 31, and the diameter of a part of the motion energy dissipation members 32 is matched with that of the first through holes, and the diameter of another part of the motion energy dissipation members 32 is matched with that of the second through holes, and by arranging a motion energy dissipation member 32 which is matched with and movable with the motion energy dissipation members 32 with different diameters in each through hole, due to different mass and friction force of the motion energy dissipation members 32 with different diameters, acoustic wave energy with different broadband frequencies can be dissipated, and the noise reduction effect of the damping energy dissipation module 3 on different noise frequency bands is improved.

The first through holes are arranged in a row along the height direction, the second through holes are arranged in a row along the height direction, and the first through holes in a row and the second through holes in a row are arranged at intervals along the width direction. In the present embodiment, the plurality of through holes 311 further includes a row of third through holes, a row of fourth through holes, and a row of fifth through holes which are sequentially arranged at intervals in the width direction and which become smaller in diameter in order, the row of third through holes being located at a side of the second through holes away from the first through holes, and the diameter of the third through holes < the diameter of the second through holes < the diameter of the first through holes. Therefore, through the through holes with five different diameters formed in the fixing seat 31, the motion energy dissipation members 32 matched with the through holes are arranged in each through hole, so that the damping energy dissipation module 3 can reduce noise in various frequency bands, and the adaptability is higher.

In this embodiment, as shown in fig. 5, the motion energy consuming member 32 is made of a lightweight material to reduce the inertial mass of the motion energy consuming member 32, thereby better dissipating acoustic energy.

The inner side wall and/or the outer side wall of the motion energy dissipation piece 32 are provided with the plurality of protrusions 322, and all the protrusions 322 are arranged at intervals along the circumferential direction and the length direction of the protrusions 322, so that the friction force of the motion energy dissipation piece 32 and the rotating force on the surface of the motion energy dissipation piece are increased, and when noise enters the damping energy dissipation module 3, the effect of sound energy dissipation is better, and the noise reduction effect is further improved. In this embodiment, the protrusions 322 may be small dots, spikes, or other irregular shapes.

In this embodiment, a dissipation layer (not shown in the figure) may be disposed between the motion energy dissipation member 32 and the through hole 311, where the dissipation layer may be a structure such as viscous glue, friction rubber, etc. and is used for dissipating energy of the sound wave, so that by adding the dissipation layer, the damping dissipation noise reduction effect can be further improved.

In other embodiments, the dissipative layer or bump 322 may be omitted to reduce manufacturing difficulty and cost for a simplified result. As shown in fig. 1-3, the present embodiment further provides a range hood, which includes a case 1, a fan 2, and the noise reduction device as described above, wherein the case 1 has an air inlet (not shown in the figures) and an air outlet (not shown in the figures). The fan 2 is arranged in the box body 1. Noise reducer, noise reducer sets up on box 1, and centre bore 321 communicates box 1 inside.

Further, the noise reduction device further comprises a shell 4, the side wall of the box 1 is provided with an opening 101, the opening 101 is arranged towards the air inlet of the fan 2, the shell 4 is arranged outside the box 1, a sound channel 401 is defined inside the shell 4 or between the shell 4 and the side wall of the box 1, the sound channel 401 is communicated with the opening 101, in this way, the sound channel 401 is also arranged opposite to the air inlet of the fan 4, and noise generated by the fan 4 is conveniently guided into the sound channel 401 to be subjected to noise reduction treatment. The damping energy dissipation module 3 is installed in the sound channel 401, and the motion energy dissipation members 32 are arranged along the sound propagation direction. Thus, the noise generated by the fan 4 enters the damping energy consumption module 3 through the sound channel 401, and friction damping energy consumption noise reduction treatment is performed.

The number of the shells 4 is two, the two opposite side walls of the box body 1 are provided with openings 101 which are opposite to the air inlets of the fan 2, the two shells 4 are respectively arranged on the two opposite outer sides of the box body 1, a sound channel 401 is defined inside the shells 4 or between the shells 4 and the side walls of the box body 1, and a damping energy consumption module 3 is arranged in each sound channel 401, so that double silencing channels can be formed by matching the two sound channels 401 with the two damping energy consumption modules 3, and the noise of the smoke ventilator can be remarkably reduced.

In this embodiment, the sound channel 401 is defined by the housing 4 and the side wall of the case 1, which is beneficial to improving the utilization rate of the side wall of the case 1, and reducing the manufacturing material of the housing 4 and the cost.

The housing 4 comprises a first section 41 and a second section 42 which are sequentially connected in an L shape, wherein the first section 41 is provided with a first cavity which is open towards the housing 1, the first section 41 is abutted against the side wall of the housing 1, and the first cavity and the side wall of the housing 1 jointly define an acoustic inlet section of the acoustic channel 401. The second section 42 has a second cavity opening toward the case 1, the second section 42 abuts against the other side wall of the case 1, the second cavity and the side wall of the case 1 together define an acoustic section of the acoustic channel 401, a mounting opening 402 communicating with the second cavity is provided in the second section 42, and an acoustic hole 403 is provided in a side of the second section 42 away from the first section 41.

In the present embodiment, the fixing seat 31 of the damping and energy dissipation module 3 is installed in the sound emitting section, and the damping and energy dissipation module 3 covers the installation opening 402, and the movement energy dissipation member 32 is along the length direction of the sound emitting section.

As shown in fig. 1-2, further, the noise reduction device further includes a noise reduction module 5, the noise reduction module 5 is disposed in the sound channel 401, and is located between the fixing seat 31 and the opening 101 and covers the opening 101, so that by adding the noise reduction module 5 located between the damping energy dissipation module 3 and the opening 101 in the sound channel 401, the noise generated by the fan 2 working is firstly damped and noise reduced by the noise reduction module 5, and then enters the damping energy dissipation module 3 through the sound channel 401 to perform friction damping dissipation and noise reduction, and thus, the noise of the smoke machine can be remarkably reduced after the noise reduction is compounded.

In this embodiment, the noise reduction module 5 is adhered to the side wall of the case 1 and covers the opening 101, so that not only can the air leakage at the opening 101 be prevented, but also the noise can be reduced by the damping loss of the noise reduction module 5, and the noise which is not absorbed by the noise reduction module 5 can be transmitted outwards along the sound channel 401.

The noise reduction module 5 includes a first flexible material layer 51 and a second flexible material layer 52 with different thicknesses, where the first flexible material layer 51 is adhered to the edge of the opening 101 and covers the opening 101, and after the first flexible material layer 51 is adhered to the edge of the opening 101 (i.e. the side wall of the box 1), a certain prestress is provided to ensure that the first flexible material layer 51 can achieve a better noise reduction effect. The second flexible material layer 52 is arranged at intervals or abutted against the first flexible material layer 51, so that the noise reduction effect is further improved by adding the second flexible material layer 52 behind the first flexible material layer 51, and the noise reduction effect is further improved by carrying out internal damping loss through the first flexible material layer 41 and the second flexible material layer 42 with different thicknesses.

The noise reduction module 5 further comprises a third flexible material layer 53, the third flexible material layer 53 is arranged between the first flexible material layer and the second flexible material layer 52, and the thickness of the third flexible material layer 53 is smaller than that of the second flexible material layer 52 and larger than that of the first flexible material layer 51, so that the noise reduction module can reduce noise by means of internal damping loss of three noise frequency bands through three layers of flexible materials with different thicknesses, and noise of different frequency bands is remarkably reduced.

In this embodiment, the thickness of the first flexible material layer 51 is 10 μm to 100 μm, which can resonate with noise in the frequency range of 500Hz to 700Hz, and can reduce noise in the frequency range of 500Hz to 700 Hz. The thickness of the second flexible material layer 52 is 100-500 μm, and the second flexible material layer can resonate with the noise with the frequency range of 300-500 Hz, thereby reducing the noise with the frequency range of 300-500 Hz. The thickness of the third flexible material layer 53 is 500-2000 mu m, can resonate with the noise with the frequency range of 150-300 Hz, can reduce the noise with the frequency range of 300-700 Hz through the damping and silencing effect of the material, covers the whole frequency range of the smoke machine, and obviously reduces the noise index of the smoke machine.

Example 2

As shown in fig. 6-7, the present embodiment is different from embodiment 1 in the structure of the fixing base 31. The fixing seat 31 is further provided with a plurality of silencing holes 312, and the arrangement modes of the silencing holes 312 and the through holes 311 can be as follows: first, as shown in fig. 7, all the noise elimination holes 312 and all the through holes 311 are respectively located at two opposite sides of the width direction of the fixed seat 31, the apertures of adjacent through holes 311 in the width direction are different, and a movable motion energy dissipation member 32 which is matched with each through hole 311 is arranged in each through hole 311, so that two different noise reduction modes can be formed, one side of the width direction of the fixed seat 31 is noise reduced through a friction damping energy dissipation mode, and the other side is noise reduced through the noise elimination holes 312; second, as shown in fig. 6, at least one sound damping hole 312 is provided at the periphery of each through hole 311, in this embodiment, the sound damping holes 312 are arranged at intervals along the width direction from the through holes 311, the apertures of adjacent through holes 311 are different in the width direction, and a movable motion energy dissipation member 32 is provided in each through hole 311, which is adapted to each through hole 311. The other parts are the same as in example 1.

It can be seen that, by adding a plurality of silencing holes 312 on the fixing base 31, the damping energy consumption module 3 can reduce noise in a damping energy consumption manner, and can reduce noise through the silencing holes 312.

Example 3

The present embodiment is different from

embodiment

1 or 2 in that the installation position of the damping and energy consuming module 3 is different, and the housing 4 and the noise reducing module 5 are omitted. In this embodiment, the damping energy consumption module 3 is installed inside the box 1, and the through hole 311 of the fixing seat 31 is set to be set towards the air inlet of the fan 2, so that the central hole 321 of the motion energy consumption piece 32 is also set towards the air inlet of the fan 2, thus, the noise reduction device is hidden inside the box 1, the overall aesthetic property of the range hood product is improved, and the noise index of the range hood can be reduced.

What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.

Claims

1. Noise reduction device, characterized by comprising a damping energy consumption module (3), the damping energy consumption module (3) comprising:

the fixing seat (31), the fixing seat (31) is provided with a plurality of through holes (311);

the motion energy consumption piece (32) is arranged in the through hole (311), the motion energy consumption piece (32) is matched with the through hole and can move, the motion energy consumption piece (32) is provided with a central hole (321) for sound to pass through, the motion energy consumption piece (32) can move along the through hole (311) under the action of sound waves,

a plurality of bulges (322) are arranged on the inner side wall and/or the outer side wall of the motion energy consumption piece (32), and/or a dissipation layer is arranged between the motion energy consumption piece (32) and the through hole (311).

2. A noise reduction device according to claim 1, characterized in that the motion energy consuming member (32) is made of a light material in a hollow structure.

3. A noise reduction device according to claim 1, characterized in that the plurality of through holes (311) comprises a number of first through holes and a number of second through holes, the first through holes having a larger pore size than the second through holes.

4. A noise reducing device according to claim 1, characterized in that the holder (31) is further provided with a plurality of sound-damping holes (312), all the sound-damping holes (312) and all the through holes (311) being located on opposite sides of the holder (31), respectively, or at least one sound-damping hole (312) being provided at the periphery of each through hole (311).

5. A range hood, comprising:

the box body (1), the said box body (1) has air intake and exhaust port;

the fan (2) is arranged in the box body (1);

the noise reduction device according to any one of claims 1 to 4, which is provided on the casing (1), the center hole (321) communicating with the inside of the casing (1).

6. A range hood according to claim 5, characterized in that the side wall of the box (1) is provided with an opening (101) towards the air inlet of the fan (2);

the noise reduction device further comprises a shell (4) arranged outside the box body (1), a sound channel (401) is defined inside the shell (4) or between the shell (4) and the side wall of the box body (1), the sound channel (401) is communicated with the opening (101), the fixing seat (31) is installed in the sound channel (401), and the motion energy dissipation piece (32) is arranged along the sound propagation direction.

7. A range hood according to claim 6, characterized in that the noise reducing device further comprises a noise reducing module (5), the noise reducing module (5) being arranged in the sound channel (401) and the noise reducing module (5) covering the opening (101).

8. A range hood according to claim 7, wherein the sound channel (401) is defined by the housing (4) together with the side walls of the casing (1), and the noise reduction module (5) is glued to the side walls of the casing (1) and covers the opening (101).

9. A range hood according to claim 7 or 8, wherein the noise reduction module (5) comprises a first flexible material layer (51) and a second flexible material layer (52) of different thickness, the first flexible material layer (51) being adhered to the edge of the opening (101) and covering the opening (101), the second flexible material layer (52) being arranged at a distance from or abutting the first flexible material layer (51).

10. A range hood according to claim 9, wherein the noise reduction module (5) further comprises a third flexible material layer (53), the third flexible material layer (53) being arranged between the first flexible material and the second flexible material layer (52), and the thickness of the third flexible material layer (53) being smaller than the thickness of the second flexible material layer (52) and larger than the thickness of the first flexible material layer (51).