CN111412511A - Noise-reducing range hood - Google Patents
Noise-reducing range hood Download PDFInfo
- Publication number
- CN111412511A CN111412511A CN202010376448.9A CN202010376448A CN111412511A CN 111412511 A CN111412511 A CN 111412511A CN 202010376448 A CN202010376448 A CN 202010376448A CN 111412511 A CN111412511 A CN 111412511A
- Authority
- CN
- China
- Prior art keywords
- noise
- fan
- range hood
- sound absorption
- noise reduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010521 absorption reaction Methods 0.000 claims abstract description 36
- 241000886569 Cyprogenia stegaria Species 0.000 claims abstract description 20
- 239000011358 absorbing material Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 8
- 239000003517 fume Substances 0.000 claims description 6
- 239000000779 smoke Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 9
- 230000001808 coupling effect Effects 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
- F04D29/664—Sound attenuation by means of sound absorbing material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention provides a noise-reducing range hood which comprises a smoke collecting hood, a fan shell arranged above the smoke collecting hood and a fan arranged in the fan shell, wherein a plurality of noise reducing plates are continuously arranged in the fan shell below the fan along the circumferential direction, the noise reducing plates are made of porous sound-absorbing materials, the noise reducing plates are in an arc shape with the middle part protruding outwards from left to right, the noise reducing plates are in an arc shape with the middle part protruding outwards from top to bottom, a plurality of spiral cavities are arranged in the noise reducing plates, a plurality of sound-absorbing openings are formed in one side of the noise reducing plates facing the fan, the opening direction of the sound-absorbing openings is vertical to the noise reducing plates, the spiral cavities correspond to the sound-absorbing openings one by one, the length of each spiral cavity is far larger than the thickness of each noise reducing plate. The invention can effectively reduce the eddy noise and improve the low-frequency sound absorption performance.
Description
Technical Field
The invention relates to the technical field of kitchen utensils, in particular to a noise-reducing range hood.
Background
The range hood works by utilizing the fluid dynamics principle, sucks and exhausts oil smoke through a centrifugal fan arranged in the range hood, and filters partial grease particles by using a filter screen. The centrifugal fan comprises a volute, an impeller arranged in the volute and a motor driving the impeller to rotate. When the impeller rotates, negative pressure suction is generated in the center of the fan, oil smoke below the range hood is sucked into the fan, accelerated by the fan and then collected and guided by the volute to be discharged out of a room.
In the prior art, the range hood usually adopts sound absorption cotton to reduce noise, but the noise reduction effect is not good, especially in the low-frequency stage.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a noise-reducing range hood.
The invention provides a noise-reduction range hood which comprises a fume collecting hood, a fan shell arranged above the fume collecting hood and a fan arranged in the fan shell, wherein the fan shell is provided with a fan inlet;
a plurality of noise reduction plates are continuously arranged in the fan shell body below the fan along the circumferential direction, the noise reduction plates are made of porous sound absorption materials, the noise reduction plates are in an arc shape with the middle part protruding outwards from left to right, and the noise reduction plates are in an arc shape with the middle part protruding outwards from top to bottom;
the inside spiral chamber that is equipped with a plurality of board of making an uproar that falls, the board of making an uproar that falls is equipped with a plurality of sound absorption mouths towards one side of fan, and the board of making an uproar falls in sound absorption mouth opening direction perpendicular to, a plurality of spiral chambers and a plurality of sound absorption mouth one-to-one, and the length in spiral chamber is far greater than the thickness of making an uproar that falls, and the sectional area of sound absorption mouth is less than the sectional.
Preferably, the ratio of the surface equivalent acoustic impedance of the porous sound absorbing material to the air characteristic impedance in the target low frequency band is greater than 1.
Preferably, a cavity is left between the noise reduction plate and the fan housing.
Preferably, the fan shell is provided with a plurality of arc-shaped bulges at the positions corresponding to the noise reduction plates.
Preferably, the noise reduction plate is detachably and fixedly connected with the fan shell.
Preferably, the helical cavity is a two-dimensional or three-dimensional structure.
Preferably, an elastic perforated film is provided within the sound absorbing port.
According to the invention, the plurality of noise reduction plates are continuously arranged along the circumferential direction in the fan shell, so that the eddy noise generated by air entering the fan shell can be effectively reduced; the sound absorption port and the spiral cavity in the noise reduction plate form a Helmholtz resonance structure, so that the sound absorption effect of the noise reduction plate at low frequency can be effectively improved; and the noise reduction plate is made of porous sound absorption materials, the spiral cavity can generate a coupling effect with micropores in the porous sound absorption materials, the low-frequency sound absorption performance is further improved, and the broadband sound absorption effect of the noise reduction range hood is effectively improved by combining the high-frequency sound absorption performance of the porous sound absorption materials.
Drawings
Fig. 1 is a schematic structural diagram of a noise-reducing range hood according to the present invention.
Fig. 2 is a schematic view of a connection structure of the noise reduction plate and the fan housing in the present invention.
Fig. 3 is a schematic structural view of a noise reduction plate according to the present invention.
Description of reference numerals:
1-smoke collecting hood 2-fan shell 3-fan 4-noise reduction plate
Detailed Description
Referring to fig. 1-3, the noise reduction range hood provided by the invention comprises a fume collecting hood 1, a fan shell 2 arranged above the fume collecting hood 1 and a fan 3 arranged in the fan shell 2;
a plurality of noise reduction plates 4 are continuously arranged in the fan shell 2 below the fan 3 along the circumferential direction, the noise reduction plates 4 are made of porous sound absorption materials, the noise reduction plates 4 are in an arc shape with the middle part protruding outwards from left to right, and the noise reduction plates 4 are in an arc shape with the middle part protruding outwards from top to bottom;
the inside spiral chamber that is equipped with a plurality of board 4 of making an uproar falls, and the board 4 of making an uproar falls towards one side of fan 3 and is equipped with a plurality of sound absorption mouths, and the board 4 of making an uproar falls in sound absorption mouth opening direction perpendicular to, a plurality of spiral chambers and a plurality of sound absorption mouth one-to-one, and the length in spiral chamber is far greater than the thickness of the board 4 of making an uproar falls, and the sectional area of sound absorption mouth is less than the.
In the invention, a plurality of noise reduction plates 4 similar to the vortex form generated when air enters the fan shell 2 are continuously arranged along the circumferential direction in the fan shell 2, so that the vortex noise can be effectively reduced, and the sound absorption ports and the spiral cavity in the noise reduction plates 4 form a Helmholtz resonance structure, so that the sound absorption effect of the noise reduction plates 4 at medium and low frequency can be effectively improved, and the noise reduction plates 4 are made of porous sound absorption materials, and the spiral cavity can generate a coupling effect with micropores in the porous sound absorption materials, so that the low-frequency sound absorption performance is further improved.
In the embodiment, the ratio of the surface equivalent acoustic impedance of the porous sound-absorbing material to the air characteristic impedance in the target low frequency band is greater than 1, so as to ensure that the sound waves enter the micropores of the porous sound-absorbing material via the sound-absorbing port and the spiral cavity in the low frequency band instead of directly entering the micropores of the porous sound-absorbing material substrate 1, and the resonance effect of the helmholtz resonance structure formed by the sound-absorbing port and the spiral cavity and the coupling effect generated between the spiral cavity and the micropores in the porous sound-absorbing material are utilized, so that the low frequency sound-absorbing performance of the noise reduction plate 4 is improved, and the sound-absorbing range and the sound-absorbing effect are expanded.
In order to further increase the frequency band range of efficient sound absorption and improve the sound absorption and noise reduction effects, in the embodiment, a cavity is left between the noise reduction plate 4 and the fan casing 2.
In order to make the noise reduction plate 4 have suitable cavity between different positions and the fan casing 2 to increase the frequency band range of the high-efficient sound absorption of different positions, improve the sound absorption and noise reduction effect, in this embodiment, the fan casing 2 is equipped with a plurality of arc-shaped protrusions with the corresponding department of the noise reduction plate 4.
In order to facilitate disassembly and assembly, in the embodiment, the noise reduction plate 4 is detachably and fixedly connected with the fan housing 2.
In this embodiment, the spiral cavity is a two-dimensional or three-dimensional structure.
In order to improve resonance and sound absorption and noise reduction effects, in the embodiment, an elastic perforated film is arranged in the sound absorption port.
In this embodiment, the spiral cavity has a semicircular or square or elliptical cross-section.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A noise reduction range hood is characterized by comprising a fume collecting hood (1), a fan shell (2) arranged above the fume collecting hood (1) and a fan (3) arranged in the fan shell (2);
a plurality of noise reduction plates (4) are continuously arranged in the fan shell (2) below the fan (3) along the circumferential direction, the noise reduction plates (4) are made of porous sound absorption materials, the noise reduction plates (4) are in an arc shape with the middle part protruding outwards from left to right, and the noise reduction plates (4) are in an arc shape with the middle part protruding outwards from top to bottom;
fall and make an uproar board (4) inside and be equipped with a plurality of spiral chambeies, fall board (4) of making an uproar and be equipped with a plurality of sound absorption mouths towards one side of fan (3), board (4) are made an uproar to sound absorption mouth opening direction perpendicular to, a plurality of spiral chambeies and a plurality of sound absorption mouth one-to-one, and the length in spiral chamber is far greater than the thickness of board (4) of making an uproar, and the sectional area of sound absorption mouth is less than the sectional area in spiral chamber.
2. The noise-reducing range hood of claim 1, wherein the ratio of the surface equivalent acoustic impedance of the porous sound-absorbing material to the air characteristic impedance in the target low frequency band is greater than 1.
3. The noise-reducing range hood according to claim 1, characterized in that a cavity is left between the noise-reducing plate (4) and the fan housing (2).
4. The noise-reducing range hood according to claim 3, wherein a plurality of arc-shaped protrusions are arranged at the positions of the fan shell (2) corresponding to the noise-reducing plate (4).
5. The noise-reducing range hood according to any one of claims 1 to 4, wherein the noise-reducing plate (4) is detachably and fixedly connected with the fan housing (2).
6. The noise-reducing range hood of claim 5, wherein the spiral cavity is of a two-dimensional or three-dimensional structure.
7. The noise-reducing range hood of claim 1, wherein an elastic perforated film is disposed in the sound-absorbing port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010376448.9A CN111412511A (en) | 2020-05-07 | 2020-05-07 | Noise-reducing range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010376448.9A CN111412511A (en) | 2020-05-07 | 2020-05-07 | Noise-reducing range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111412511A true CN111412511A (en) | 2020-07-14 |
Family
ID=71492272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010376448.9A Pending CN111412511A (en) | 2020-05-07 | 2020-05-07 | Noise-reducing range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111412511A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895474A (en) * | 2020-09-11 | 2020-11-06 | 广东万家乐燃气具有限公司 | Range hood with noise reduction function |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438485A (en) * | 2016-11-08 | 2017-02-22 | 广东美的厨房电器制造有限公司 | Volute of extractor hood and extractor hood |
| CN108317561A (en) * | 2018-03-26 | 2018-07-24 | 司会娟 | A kind of kitchen ventilator reducing noise |
| CN108731065A (en) * | 2018-07-14 | 2018-11-02 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with noise filtering function guiding subassembly |
| CN109058175A (en) * | 2018-07-26 | 2018-12-21 | 广东海信家电有限公司 | A kind of denoising device |
| CN109817435A (en) * | 2019-02-27 | 2019-05-28 | 中国科学院电工研究所 | Spiral cavity sound insulation window device for transformer ventilation and noise reduction |
| CN110094776A (en) * | 2018-01-31 | 2019-08-06 | 宁波方太厨具有限公司 | A kind of noise reducing type range hood |
-
2020
- 2020-05-07 CN CN202010376448.9A patent/CN111412511A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438485A (en) * | 2016-11-08 | 2017-02-22 | 广东美的厨房电器制造有限公司 | Volute of extractor hood and extractor hood |
| CN110094776A (en) * | 2018-01-31 | 2019-08-06 | 宁波方太厨具有限公司 | A kind of noise reducing type range hood |
| CN108317561A (en) * | 2018-03-26 | 2018-07-24 | 司会娟 | A kind of kitchen ventilator reducing noise |
| CN108731065A (en) * | 2018-07-14 | 2018-11-02 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with noise filtering function guiding subassembly |
| CN109058175A (en) * | 2018-07-26 | 2018-12-21 | 广东海信家电有限公司 | A kind of denoising device |
| CN109817435A (en) * | 2019-02-27 | 2019-05-28 | 中国科学院电工研究所 | Spiral cavity sound insulation window device for transformer ventilation and noise reduction |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895474A (en) * | 2020-09-11 | 2020-11-06 | 广东万家乐燃气具有限公司 | Range hood with noise reduction function |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200714 |