CN110701648B - Noise reduction component and smoke exhaust ventilator - Google Patents
Noise reduction component and smoke exhaust ventilator Download PDFInfo
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- CN110701648B CN110701648B CN201810752557.9A CN201810752557A CN110701648B CN 110701648 B CN110701648 B CN 110701648B CN 201810752557 A CN201810752557 A CN 201810752557A CN 110701648 B CN110701648 B CN 110701648B
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- 230000009467 reduction Effects 0.000 title claims abstract description 77
- 239000000779 smoke Substances 0.000 title abstract description 10
- 230000030279 gene silencing Effects 0.000 claims abstract description 15
- 238000004891 communication Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 13
- 230000003584 silencer Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000010411 cooking Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention discloses a noise reduction component. The noise reduction component comprises a cylinder body and a noise reduction module. The cylinder is formed with a flow passage. The silencing module comprises a plurality of audio generators, the plurality of audio generators are arranged on the inner wall of the barrel at intervals along the circumferential direction of the barrel, when first sound waves are conducted in the flow channel, the plurality of audio generators are used for generating second sound waves, the phase of the second sound waves is opposite to that of the first sound waves, and the amplitude of the second sound waves is identical to that of the first sound waves so as to reduce the loudness formed by the first sound waves. The noise reduction component provided by the embodiment of the invention utilizes the sound wave generated by the audio generator to reduce noise, can simply and conveniently realize noise reduction, has a good noise reduction effect, and is beneficial to improving user experience. The invention also discloses a smoke exhaust ventilator.
Description
Technical Field
The invention relates to the technical field of noise reduction, in particular to a noise reduction component and a smoke exhaust ventilator.
Background
With the rising health awareness of people, the range hood has become a necessary household appliance in a household kitchen. The smoke exhaust ventilator can absorb the oil smoke and other gases generated during cooking to prevent the oil smoke and other gases from diffusing to harm the health of users. However, the range hood generates large noise during operation, affecting the user experience.
Disclosure of Invention
The invention provides a noise reduction component and a range hood.
The noise reduction component provided by the invention comprises a cylinder body and a silencing module. The cylinder is formed with a flow passage. The sound attenuation module comprises a plurality of audio generators, the audio generators are arranged on the inner wall of the cylinder at intervals along the circumferential direction of the cylinder, when first sound waves are conducted in the flow channel, the audio generators are used for generating second sound waves, the phases of the second sound waves are opposite to those of the first sound waves, and the amplitudes of the second sound waves are identical to those of the first sound waves so as to reduce the loudness formed by the first sound waves.
In some embodiments, the number of the silencing modules is plural, and the silencing modules are arranged at intervals along the axial direction of the flow channel.
In certain embodiments, the plurality of audio generators are spaced apart along the same circumference of the barrel.
In some embodiments, the noise reduction feature includes a sound collector disposed in the flow channel for collecting the first sound wave.
In some embodiments, the plurality of audio generators enclose a noise reduction zone, and the sound collector is disposed proximate to the noise reduction zone.
In some embodiments, the noise reduction feature further comprises a bulk acoustic abatement element integrally disposed on the inner wall, the bulk acoustic abatement element for absorbing sound within the flow passage, the bulk acoustic abatement element integrally covering the inner wall.
In some embodiments, the fluffy sound-attenuating element includes a sound-attenuating surface opposite the inner wall, the sound-attenuating surface being wavy along the circumference of the barrel.
In certain embodiments, the plurality of audio generators are embedded within the fluffy sound-attenuating element.
In some embodiments, the flow channel is formed with an exhaust port, and the noise reduction feature includes a rectifying element disposed proximate the exhaust port, the rectifying element being formed with a plurality of rectifying apertures in flow communication with the flow, the plurality of rectifying apertures being arranged in an array.
The smoke exhaust ventilator provided by the invention comprises the noise reduction component and the air draft device. The air draft device is formed with an air channel communicated with the flow channel, and the air draft device comprises a fan arranged in the air channel.
According to the noise reduction component and the smoke exhaust ventilator, the sound wave generated by the audio generator is used for reducing noise, so that noise reduction can be simply and conveniently realized, the noise reduction effect is good, and the user experience is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
Fig. 1 is a perspective view of a range hood according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the range hood of FIG. 1 in the direction II-II;
FIG. 3 is a schematic perspective view of a noise reduction feature of an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of the noise reduction feature of FIG. 3 along the direction IV-IV;
FIG. 5 is a schematic cross-sectional view of the noise reduction feature of FIG. 4 along the V-V direction;
fig. 6 is a schematic view of noise reduction of the noise reduction module according to the embodiment of the present invention.
Fig. 7 is a schematic view of a fluffy sound-deadening element of an embodiment of the present invention, reducing noise.
Fig. 8 is a schematic perspective view of a rectifying element according to an embodiment of the present invention;
fig. 9 is a schematic plan view of a rectifying element according to an embodiment of the present invention.
Description of main reference numerals:
The air extractor comprises an air extractor 1000, noise reduction components 100, a cylinder 10, a flow passage 12, an air exhaust 122, an inner wall 14, a noise reduction module 20, an audio generator 22, a noise reduction area 24, a sound collector 30, a fluffy noise reduction element 40, a noise reduction surface 42, a rectifying element 50, a rectifying hole 52, a controller 60, an air extractor 200, a thickness A, a diameter B, a center distance C, first sound waves X and second sound waves Y.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
Referring to fig. 1 and 2, a range hood 1000 according to an embodiment of the present invention includes a noise reduction member 100 and an exhaust device 200.
Referring to fig. 3, 4 and 5, a noise reduction component 100 according to an embodiment of the present invention includes a cylinder 10 and a noise reduction module 20. The cylinder 10 is formed with a flow passage 12. The silencing module 20 includes a plurality of audio generators 22, the plurality of audio generators 22 are disposed on the inner wall of the barrel 10 at intervals along the circumferential direction of the barrel 10, wherein when the first sound wave X is conducted in the flow channel 12, the plurality of audio generators 22 are used for generating a second sound wave Y, the phase of the second sound wave Y is opposite to that of the first sound wave X, and the amplitude of the second sound wave Y is the same as that of the first sound wave X so as to reduce the loudness formed by the first sound wave X.
The noise reduction component 100 and the smoke exhaust ventilator 1000 in the embodiment of the invention utilize the sound wave generated by the audio generator 22 to reduce noise, can simply and conveniently realize noise reduction, have good noise reduction effect and are beneficial to improving user experience.
It will be appreciated that in operation of the range hood 1000, the exhaust device 200 needs to be operated at a high speed to create a region of negative pressure over the range, thereby drawing the cooking fumes from the chamber into the interior of the range hood 1000. Thus, the range hood 1000 may generate loud noise, affecting the user experience.
Note that the dashed lines in fig. 2 and 4 represent sound waves.
The noise reduction of the noise reduction component 100 and the range hood 1000 of the embodiments of the present invention is mainly performed from both physical noise reduction and electronic noise reduction aspects. Physical noise reduction refers to noise reduction by physical means (e.g., isolation). Electronic noise reduction is the neutralization of noise by generating a reverse sound wave equal to the external noise.
Specifically, in the embodiment of the present invention, the electronic noise reduction is mainly performed by canceling interference between the first sound wave X generated by the range hood 1000 and the second sound wave Y having the opposite phase. The noise reduction feature 100 and range hood 1000 of embodiments of the present invention can reduce the noise by at least 8dB through electronic noise reduction.
In one example, the noise before noise reduction is 50dB and the noise after noise reduction is 42dB, that is, the noise is reduced by 8dB; in another example, the noise before noise reduction is 56dB and the noise after noise reduction is 46dB, that is, the noise is reduced by 10dB; in yet another example, the pre-noise reduction noise is 62dB and the post-noise reduction noise is 50dB, i.e., the noise is reduced by 12dB.
In addition, the audio generator 22 may be magneto-electric, piezo-electric or other types. The audio generator 22 may cause the audio power to vibrate the cone or diaphragm and resonate (resonate) with the surrounding air to produce sound by electromagnetic, piezoelectric or electrostatic effects.
The cylinder 10 may have a cylindrical shape, a square cylindrical shape, or other shapes. The shape of the cylinder 10 is not limited here.
In some embodiments, the number of the silencer modules 20 is plural, and the silencer modules 20 are disposed at intervals along the axial direction of the flow passage 12.
Thus, the noise reduction effect can be better. It will be appreciated that in practical applications, generally speaking, noise will remain after one noise reduction, and the provision of a plurality of silencing modules 20 spaced axially along the flow path 12 may reduce the noise multiple times, thereby further reducing the noise.
In one example, 2 silencer modules 20 are disposed at intervals along the axial direction of the flow passage 12; in another example, 3 silencer modules 20 are disposed at intervals along the axial direction of the flow passage 12; in yet another example, 4 silencer modules 20 are disposed at intervals along the axial direction of the flow passage 12. For convenience of explanation, in this embodiment, 3 silencing modules 20 are taken as an example. It should be noted that the number of the sound modules 20 is not limited herein.
In certain embodiments, a plurality of audio generators 22 are spaced along the same circumference of the cartridge 10.
Note that, specifically, the plurality of audio generators 22 of the same silencing module 20 are disposed at intervals along the same circumference of the cylinder 10. When the cylinder 10 is cylindrical, the plurality of audio generators 22 are disposed along the same circumferential direction of the cylinder 10.
In one example, each muffler module 20 includes 6 audio generators 22; in another example, each silencer module 20 includes 8 audio generators 22; in yet another example, each silencer module 20 includes 10 audio generators 22. For convenience of explanation, in this embodiment, each silencing module 20 includes 8 audio generators 22 as an example. It should be noted that the number of audio generators 22 included in each silencer module 20 is not limited herein.
In some embodiments, the plurality of audio generators 22 are equally angularly spaced along the same circumferential direction.
In this way, the distribution of the second sound waves Y emitted by the audio generator 22 can be made more uniform. It can be understood that the plurality of audio generators 22 are arranged at equal angular intervals along the same circumferential direction, so that the plurality of audio generators 22 are uniformly spaced in the same circumferential direction and uniformly distributed, so that the second sound waves Y emitted by the plurality of audio generators 22 are more uniformly distributed, and the noise reduction effect is better. Of course, the plurality of audio generators 22 may be disposed at different angular intervals in the same circumferential direction. There is no limitation as to whether the plurality of audio generators 22 are arranged at equal angular intervals in the same circumferential direction.
In certain embodiments, the noise reduction feature 100 includes a sound collector 30 disposed in the flow channel 12, the sound collector 30 for collecting the first sound wave X.
In some embodiments, the plurality of audio generators 22 enclose a noise reduction zone 24, and the sound collector 30 is disposed proximate to the noise reduction zone 24.
Thus, the acquisition of the first acoustic wave X is realized. It will be appreciated that referring to fig. 6, the audio generator 22 of the noise reduction component 100 emits a second sound wave Y having a phase opposite to that of the first sound wave X to cause the first sound wave X and the second sound wave Y to be audio-swept, and therefore the first sound wave X needs to be collected to determine the characteristic of the first sound wave X, so that the controller 60 controls the audio generator 22 of the noise reduction component 100 to emit the second sound wave Y having a phase opposite to that of the first sound wave X.
Specifically, after the user starts the range hood 1000, the range hood 1000 starts to operate and generate noise, the controller 60 controls the sound collector 30 to collect the first sound wave X, then controls the audio generator 22 to generate the second sound wave Y with the same amplitude and opposite phase to the first sound wave X according to the first sound wave X, and finally the controller 60 controls the audio generator 22 to emit the second sound wave Y.
In certain embodiments, the noise reduction feature 100 further includes a bulk acoustic abatement element 40 integrally disposed on the inner wall 14, the bulk acoustic abatement element 40 being configured to absorb sound within the flow passage 12, the bulk acoustic abatement element 40 integrally covering the inner wall 14.
Thus, noise is further reduced. It will be appreciated that the second sound wave Y emitted by the audio generator 22 in phase opposition to the first sound wave X is primarily intended to reduce regular noise and/or low frequency noise, while the objectionable noise and/or high frequency noise is less effective. Thus, further processing of the noise by the fluffy sound-attenuating element 40 is required.
Fig. 7 is a schematic view of the fluffy sound-deadening element 40 of an embodiment of the present invention, reducing noise. In particular, the fluffy sound attenuating element 40 may be made of porous, relatively low density materials such as sponge, activated carbon, and slag wool. The sponge, the active carbon, the slag cotton and other materials are porous, the pores are open holes which are communicated with each other, when the sound waves penetrate into the pores of the materials, the sound waves are subjected to air molecular friction and viscous resistance, and the fine fibers can be made to vibrate mechanically, so that the sound energy is converted into heat energy, and the noise reduction effect is realized.
It should be noted that the integral arrangement of the fluffy silencing element 40 on the inner wall 14 means that: the fluffy sound-attenuating element 40 covers the inner wall 14 substantially completely.
In certain embodiments, the fluffy sound-attenuating element 40 includes a sound-attenuating surface 42, the sound-attenuating surface 42 being opposite the inner wall 14; along the circumferential direction of the cylinder 10, the sound deadening surface 42 is wavy. Thus, the noise reduction effect is better.
Further, in some embodiments, the sound attenuating surface 42 is also wavy in the axial direction of the barrel 10.
In certain embodiments, a plurality of audio generators 22 are embedded within the fluffy sound attenuating element 40. Therefore, the noise reduction effect is better while the space is reasonably utilized.
In certain embodiments, the flow passage 12 is formed with an exhaust port 122 and the noise reduction feature 100 includes a rectifying element 50 disposed proximate the exhaust port 122, the rectifying element 50 being formed with a plurality of rectifying apertures 52 in communication with the flow passage 12, the plurality of rectifying apertures 52 being arranged in an array.
Thus, the plurality of rectifying holes 52 can be used for rectifying the flocculated air flow to form stable air flow, and the amplitude of sound waves is weakened accordingly, so that the purpose of noise reduction is achieved.
In one example, the rectifying element 50 may be made of activated carbon. Activated carbon is a very fine carbon particle with a large surface area, so that the activated carbon can be fully contacted with air. In addition, the carbon granules also have finer holes-capillaries. The capillary tube has strong adsorption capacity, and impurities in the air can be adsorbed when the impurities touch the capillary tube, so that the air is purified. The active carbon adsorption method has wide application, mature process, safety, reliability and more absorption substance types, and the active carbon prepared rectifying element 50 is arranged at a position close to the exhaust port 122, so that the active carbon adsorption method is simple and convenient, can further reduce noise, and is also beneficial to further evolving air and removing peculiar smell.
In addition, the "the plurality of rectifying holes 52 are arranged in an array" may refer to a two-dimensional rectangular array in which the plurality of rectifying holes 52 are perpendicular to each other in two rows and columns, a three-dimensional rectangular array in which the plurality of rectifying holes 52 are perpendicular to each other in three axes, a circular array in which the plurality of rectifying holes 52 uniformly diverge from the center of a circle, or other arrays of the plurality of rectifying holes 52. The form of the array of the plurality of rectifying holes 52 is not limited here.
The rectifying hole 52 may have a circular shape, a square shape, or an arbitrary irregular shape. The shape of the rectifying hole 52 is not limited here.
Referring to fig. 8 and 9, in one example, the rectifying element 50 is cylindrical, the rectifying element 50 has a thickness a of 38-45mm and a diameter B of 145-150mm; and/or the sectional area S of each rectifying hole 52 is 20-30mm 2, and the center distance C of two adjacent rectifying holes 52 is 5-8mm.
Note that "the rectifying element 50 has a thickness a of 38 to 45mm and a diameter B of 145 to 150mm; and/or the sectional area S of each rectifying hole 52 is 20-30mm 2, and the center-to-center distance C of two adjacent rectifying holes 52 is 5-8mm "includes three cases:
In the first case, the rectifying element 50 has a thickness A of 38-45mm and a diameter B of 145-150mm;
In the second case, the sectional area S of each rectifying hole 52 is 20-30mm 2, and the center distance C of two adjacent rectifying holes 52 is 5-8mm;
In the third case, the rectifying element 50 has a thickness A of 38-45mm and a diameter B of 145-150mm, and each rectifying hole 52 has a sectional area S of 20-30mm 2, and the centers of two adjacent rectifying holes 52 are spaced apart from each other by a distance C of 5-8mm.
In one example, the rectifying element 50 has a thickness A of 38mm and a diameter B of 145mm; in another example, the rectifying element 50 has a thickness A of 45mm and a diameter B of 150mm; in yet another example, the rectifying element 50 has a thickness A of 41mm and a diameter B of 147mm.
In one example, the cross-sectional area S of each rectifying hole 52 is 20mm 2, and the center-to-center distance C of two adjacent rectifying holes 52 is 5mm; in another example, the cross-sectional area S of each of the rectifying holes 52 is 30mm 2, and the center-to-center distance C of two adjacent rectifying holes 52 is 8mm; in yet another example, the cross-sectional area S of each of the rectifying holes 52 is 25mm 2, and the center-to-center distance C of two adjacent rectifying holes 52 is 6.5mm.
In the description of the present specification, reference to the terms "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. A noise reduction feature, comprising:
A cylinder body formed with a flow passage; and
The sound attenuation module comprises a plurality of audio generators which are arranged on the inner wall of the cylinder body at intervals along the circumferential direction of the cylinder body, wherein when a first sound wave is conducted in the flow channel, the plurality of audio generators are used for generating a second sound wave, the phase of the second sound wave is opposite to that of the first sound wave, and the amplitude of the second sound wave is the same as that of the first sound wave so as to reduce the loudness formed by the first sound wave;
The fluffy silencing element is integrally arranged on the inner wall and used for absorbing sound in the flow channel, the fluffy silencing element integrally covers the inner wall and comprises a silencing surface opposite to the inner wall, the silencing surface is wavy along the circumferential direction of the cylinder, and the plurality of audio generators are embedded in the fluffy silencing element.
2. The noise reduction feature of claim 1, wherein the number of said sound attenuation modules is plural, and wherein the plural sound attenuation modules are disposed at intervals along the axial direction of said flow path.
3. The noise reduction feature of claim 1, wherein the plurality of audio generators are spaced apart along the same circumference of the barrel.
4. The noise reduction feature of claim 1, comprising a sound collector disposed in the flow channel for collecting the first sound waves.
5. The noise reduction feature of claim 4, wherein the plurality of audio generators enclose a noise reduction zone, the sound collector being disposed proximate the noise reduction zone.
6. The noise reduction feature of claim 1, wherein the flow channel is formed with an exhaust port, the noise reduction feature comprising a rectifying element disposed proximate the exhaust port, the rectifying element being formed with a plurality of rectifying apertures in communication with the flow channel, the plurality of rectifying apertures being arranged in an array.
7. A range hood, comprising:
the noise reduction feature of any of claims 1-6; and
The air exhausting device is formed with an air channel communicated with the flow channel and comprises a fan arranged in the air channel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810752557.9A CN110701648B (en) | 2018-07-10 | 2018-07-10 | Noise reduction component and smoke exhaust ventilator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810752557.9A CN110701648B (en) | 2018-07-10 | 2018-07-10 | Noise reduction component and smoke exhaust ventilator |
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| CN110701648A CN110701648A (en) | 2020-01-17 |
| CN110701648B true CN110701648B (en) | 2024-05-24 |
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| WO2024013662A1 (en) * | 2022-07-12 | 2024-01-18 | Elica S.P.A. | A sound absorbing device |
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| CN101131242A (en) * | 2006-08-25 | 2008-02-27 | 博西华电器（江苏）有限公司 | Improved cooking fume draft fan |
| CN101881474A (en) * | 2010-05-18 | 2010-11-10 | 宁波方太厨具有限公司 | Novel rectifying noise-reduction close-suction range hood |
| CN102042628A (en) * | 2011-01-10 | 2011-05-04 | 宁波方太厨具有限公司 | Range hood with flow-stabilizing and noise-reducing structure |
| EP2594853A1 (en) * | 2011-11-21 | 2013-05-22 | Ask Industries Societa' per Azioni | A low-noise fume extractor hood. |
| ITAN20120079U1 (en) * | 2011-11-21 | 2013-05-22 | Sipe Srl | SILENT SMOKE SUCTION HOOD. |
| CN203928063U (en) * | 2014-06-20 | 2014-11-05 | 宁波方太厨具有限公司 | A kind of lampblack filter |
| WO2016061829A1 (en) * | 2014-10-25 | 2016-04-28 | 佛山市顺德区合捷电器实业有限公司 | Noise-reducing silent range hood and smoke discharging tube |
| CN104534532A (en) * | 2014-12-18 | 2015-04-22 | 宁波方太厨具有限公司 | Noise reduction device of range hood |
| CN205425376U (en) * | 2016-02-02 | 2016-08-03 | 深圳市金迈高智能科技有限公司 | Take active noise reduction's new fan |
| CN105588159A (en) * | 2016-03-08 | 2016-05-18 | 广东美的厨房电器制造有限公司 | Rectification part for extractor hood and extractor hood with rectification part |
| CN206001563U (en) * | 2016-07-22 | 2017-03-08 | 宁波方太厨具有限公司 | A kind of range hood |
| CN106642262A (en) * | 2016-08-20 | 2017-05-10 | 中声科技（北京）有限公司 | Range hood capable of initiatively eliminating noise |
| WO2018103151A1 (en) * | 2016-12-06 | 2018-06-14 | 美的集团股份有限公司 | Base and bladeless fan |
| CN210740497U (en) * | 2019-09-27 | 2020-06-12 | 浙江蓝炬星电器有限公司 | Integrated kitchen with silence range hood device |
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