CN116857689A - Fume exhaust fan - Google Patents
Fume exhaust fan Download PDFInfo
- Publication number
- CN116857689A CN116857689A CN202210313903.XA CN202210313903A CN116857689A CN 116857689 A CN116857689 A CN 116857689A CN 202210313903 A CN202210313903 A CN 202210313903A CN 116857689 A CN116857689 A CN 116857689A
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- range
- sound
- range hood
- air inlet
- silencing
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- 239000003517 fume Substances 0.000 title description 3
- 230000030279 gene silencing Effects 0.000 claims abstract description 45
- 230000000391 smoking effect Effects 0.000 claims abstract description 12
- 238000013016 damping Methods 0.000 claims description 57
- 230000005494 condensation Effects 0.000 claims description 34
- 238000009833 condensation Methods 0.000 claims description 34
- 230000008030 elimination Effects 0.000 description 19
- 238000003379 elimination reaction Methods 0.000 description 19
- 239000000779 smoke Substances 0.000 description 14
- 238000010521 absorption reaction Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 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
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
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- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computational Linguistics (AREA)
- Chemical & Material Sciences (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Duct Arrangements (AREA)
Abstract
The invention discloses a range hood, which comprises: the box body is internally provided with a working cavity; the fan assembly is arranged in the working cavity; the air inlet structure is connected with the box body and is provided with a smoking port; the condensing piece is arranged at the smoking opening; and the silencing structure is arranged on the inner side surface of the condensing piece. The technical scheme of the invention can eliminate noise generated by sucking air flow when the range hood works.
Description
Technical Field
The invention relates to the technical field of kitchen equipment, in particular to a range hood.
Background
The kitchen ventilator is an electric appliance for gas with oil smoke and the like generated during cooking, and is basically popularized in the market at present. When the range hood works, the air flow bypasses a condensing part, an oil filter screen and the like of the range hood, and the flow before the air flow reaches the fan impeller is uneven, so that larger noise is easy to generate, and the noise propagates to the external environment of the range hood through an air inlet structure of the range hood to cause noise trouble to personnel in a kitchen.
Disclosure of Invention
The embodiment of the invention provides a range hood.
The range hood according to the embodiment of the invention comprises:
the box body is internally provided with a working cavity;
the fan assembly is arranged in the working cavity;
the air inlet structure is connected with the box body and is provided with a smoking port;
the condensing piece is arranged at the smoking opening; and
and the silencing structure is arranged on the inner side surface of the condensing piece.
According to the range hood, the silencing structure is arranged on the inner side face of the condensing part, so that noise generated by air flow sucking and entering the working cavity is eliminated, noise pollution to a kitchen environment caused by escape of the noise from the smoke suction opening of the air inlet structure is avoided, and user experience is improved.
In some embodiments, the sound attenuating structure includes an extension tube acoustic metamaterial piece that covers an inner side of the condensation piece, the extension tube acoustic metamaterial piece including a plurality of extension tube sound attenuating units disposed at intervals.
In some embodiments, the extension pipe silencing unit comprises a silencing cavity extending along the thickness direction and an extension pipe extending into the silencing cavity, a space is arranged between the cavity wall of the silencing cavity and the pipe wall of the extension pipe, and a silencing through hole is arranged in the extension pipe.
In certain embodiments, the extension pipe sound damping unit meets at least one of the following conditions:
the depth of the extension tube is selected from the range of 5mm to 20mm;
the distance between the end of the extension tube located in the silencing cavity and the end of the silencing cavity far away from the extension tube is selected from the range of 5mm to 25mm;
the radius of the silencing through hole is selected from the range of 0.5mm to 5mm;
the elongate tube acoustic metamaterial piece has a perforation rate selected from the range of 3% to 20%.
In some embodiments, the extension tube acoustic metamaterial comprises a first sound attenuating unit module and a second sound attenuating unit module, wherein the frequency band of noise eliminated by the extension tube sound attenuating unit of the first sound attenuating unit module is different from the frequency band of noise eliminated by the extension tube sound attenuating unit of the second sound attenuating unit module.
In some embodiments, the sound attenuating structure includes an acoustic diffuser overlaying an inner side of the condensing member, the acoustic diffuser configured to reflect sound waves back into the working chamber.
In some embodiments, the acoustic diffuser comprises a plurality of right triangular prisms connected in sequence, and the length values of two right-angle sides of the cross section of the right triangular prisms along the circumferential direction are adjusted to reflect sound waves with different angles back to the working cavity.
In certain embodiments, the two right angle sides have a length value respectively selected from the range of 20mm to 50mm.
In some embodiments, the inclined surfaces of at least two of the right triangular prisms are oriented differently from each other.
In certain embodiments, the range hood further comprises a honeycomb device, the fan assembly is provided with an air inlet, and the honeycomb device is arranged at the air inlet; the honeycomb device comprises a plurality of air inlet pipelines which are arranged at intervals, and the air inlet pipelines are communicated with the working cavity and the inside of the fan assembly.
In certain embodiments, the cross-section of the air intake conduit is configured as a hexagon.
In certain embodiments, the air inlet duct satisfies at least one of the following conditions:
the aperture of the air inlet pipeline is selected from the range of 6mm to 12mm;
the length of the air inlet pipeline is selected from the range of 5mm to 12mm;
the wall thickness of the air inlet pipeline is selected from the range of 0.1mm to 0.3mm;
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
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained from the structures shown in these drawings without the need for inventive effort to a person skilled in the art.
Fig. 1 is a schematic structural diagram of a range hood according to an embodiment of the present invention;
fig. 2 is another schematic structural view of a range hood according to an embodiment of the present invention;
fig. 3 is a schematic structural view of an extension pipe muffler unit of the range hood according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of an extension pipe acoustic metamaterial piece of a range hood according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of an extension tube acoustic metamaterial piece according to an embodiment of the present invention;
FIG. 6 is another schematic structural view of an extension tube acoustic metamaterial piece according to an embodiment of the present invention;
FIG. 7 is a schematic view of the structure of an acoustic diffuser according to an embodiment of the present invention;
fig. 8 is a schematic structural view of a honeycomb structure of a range hood according to an embodiment of the present invention.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 10 | Fume exhaust fan | 510 | Acoustic metamaterial piece for extension tube |
| 100 | Box body | 511 | Extension pipe noise elimination unit |
| 110 | Working chamber | 512 | Sound-absorbing cavity |
| 200 | Fan assembly | 513 | Extension tube |
| 210 | Honeycomb device | 514 | Silencing through hole |
| 211 | Air inlet pipeline | A | First sound-deadening unit module |
| 300 | Air inlet structure | B | Second sound-deadening unit module |
| 310 | Smoking mouth | 520 | Acoustic diffuser |
| 400 | Condensation piece | 521 | Right-angle triangular prism |
| 500 | Noise elimination structure |
The achievement of the object, functional features and advantages of the present invention will be further described with reference to the drawings in connection with the embodiments.
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 the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. Either mechanically or electrically. 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.
The embodiment of the invention provides a range hood 10, which aims to eliminate noise generated by sucking airflow when the range hood 10 works.
Referring to fig. 1, in an embodiment of the present invention, the range hood 10 includes: a case 100 having a working chamber 110 therein;
the fan assembly 200 is arranged in the working cavity 110;
the air inlet structure 300 is connected with the box body 100, and the air inlet structure 300 is provided with a smoking port 310;
a condensation member 400 provided at the smoking port 310; and
the silencing structure 500 is disposed on the inner side of the condensation member 400.
Specifically, in the embodiment of the present invention, the range hood 10 is used in a scene where oil smoke is generated in a kitchen or the like, and is used for sucking and exhausting gas with oil smoke or the like; the case 100 has a function of protecting components provided in the inner working chamber 110 thereof, and can provide a place for installing and working for the components; in the working chamber 110 where the fan assembly 200 and other parts are installed, when the fan assembly 200 works, gas with substances such as oil smoke in a kitchen is sucked through the smoke suction opening 310 provided on the air inlet structure 300 to form air flow into the working chamber 110, the air flow flows in the space in the working chamber 110 and then enters the fan assembly 200 to be discharged to the environment space outside the kitchen, so that the function of sucking the oil smoke gas of the range hood 10 is realized. When the air flows through the condensation member 400, the air inlet structure 300 and other parts, and the working chamber 110 and other structures, turbulence is generated, noise is generated by these turbulence, especially when the space between the air inlet 310 and the working chamber 110 is provided with parts such as an oil filter screen, the air flow becomes unstable due to the obstruction of these parts, so that the noise is aggravated, and further, when the air enters the fan assembly 200, a great amount of noise is generated due to the turbulence generated by the air flow, and the noise is mutually overlapped and then propagates into the kitchen environment through the air inlet 310 of the air inlet structure 300, so that great noise pollution is caused, and the comfort level of the kitchen environment is seriously reduced.
The range hood 10 in this embodiment includes the condensation member 400 disposed at the smoke suction port 310, and a space is formed between the condensation member 400 and the smoke suction port 310 for allowing air to circulate, optionally, the size and shape of the condensation member 400 are matched with those of the smoke suction port 310 so that the condensation member 400 can be disposed in a form of covering at least a part of the smoke suction port 310, the condensation member 400 functions to cool the air flow when passing through the smoke suction port 310, and the oil substances carried by the cooled air flow can be better filtered by the oil filter when the cooled air flow passes through the oil filter.
In this embodiment, the silencing structure 500 is disposed on the inner side of the condensation member 400, so that the noise in the working chamber 110 can be eliminated, and the noise in the working chamber is transmitted out and then is directly eliminated or reflected by the silencing structure 500 disposed on the inner side of the condensation member 400, and similarly, the noise generated when the air flows through the condensation member 400 is eliminated by the silencing structure 500, so that the noise is prevented from being transmitted into the kitchen environment to cause noise pollution, and a quiet and comfortable kitchen environment is further provided.
In addition, the volume and the occupied space of the range hood 10 can be reduced, specifically, the silencing structure 500 is arranged on the inner side of the condensation piece 400, and the structure form of the silencing structure belongs to an additionally arranged part, and does not occupy too much volume, so that the volume and the occupied space of the range hood 10 can be reduced; further, the muffler structure 500 is disposed at the inner side of the condensation member 400 to prevent the condensation member from being damaged by the external moving object, and reduce the dust falling on the surface thereof.
Optionally, in this embodiment, the air intake structure 300 included in the range hood 10 is connected to the lower side of the box 100, that is, the side close to the cooking bench, so as to adapt to the installation position and the installation mode of the range hood 10 in the kitchen, because the kitchen generates the gas with the oil smoke, which generally moves upwards due to the higher temperature, the range hood 10 is generally installed at the higher position of the kitchen wall, and the air intake structure 300 is located on the lower side of the box 100, so that the operation of sucking the gas by the range hood 10 can be more convenient. However, the present design is not limited thereto, and in other embodiments, the air intake structure 300 may be connected to other positions of the box 100, so long as the operation requirement of the range hood 10 can be satisfied.
Further optionally, in this embodiment, the condensation member 400 is configured as a condensation plate, that is, the shape of the condensation member 400 is a plate, the extending direction of the condensation plate is perpendicular to the direction in which the smoking opening 310 faces, and the shape, size and position of the silencing structure 500 are all matched with those of the condensation member 400, which can be understood that the condensation plate is easier to manufacture due to its flat surface and has the beneficial effects of simple structure, small occupied space and simple and attractive appearance, while the extending direction of the condensation plate is perpendicular to the direction in which the smoking opening 310 faces, so that the silencing structure 500 disposed on the inner side surface thereof can better eliminate or reflect noise transmitted from the working cavity. However, the present design is not limited thereto, and in other embodiments, the condensation member 400 may be configured in other shapes; in still other embodiments, the extending direction of the condensing plate may also form another angle with the direction in which the smoke absorbing port 310 faces, which is only required to satisfy the beneficial effect of directly eliminating or reflecting noise of the sound absorbing structure 500.
Still further alternatively, in this embodiment, the condensation member 400 is detachably connected to adjacent parts to maintain a fixed state, and it can be understood that the condensation member 400 can be conveniently assembled and disassembled, so that the condensation member 400 can be conveniently overhauled and replaced, and further, after the condensation member 400 is disassembled, a worker can conveniently perform corresponding operations on the parts in the smoking port 310. Optionally, the condensation member 400 is connected to the adjacent parts by a snap connection, which is understood to have the advantages of simple and easy operation and simple connection structure. However, the present design is not limited thereto, and in other embodiments, the condensation member 400 may be connected to the adjacent components by a screw locking method, etc.
Referring to fig. 1 and fig. 3 to 6 together, in the present embodiment, the sound damping structure 500 includes an extension tube acoustic metamaterial 510, the extension tube acoustic metamaterial 510 is covered on an inner side surface of the condensation member 400, and the extension tube acoustic metamaterial 510 includes a plurality of extension tube sound damping units 511 disposed at intervals. The effect of the extension pipe acoustic metamaterial 510 is to absorb noise into the internal structure thereof to be eliminated through the plurality of extension pipe noise elimination units 511 arranged at intervals, so that the noise transmitted to the surface of the extension pipe acoustic metamaterial can be directly eliminated, and the plurality of extension pipe noise elimination units 511 arranged at intervals can unitize the functional parts of the extension pipe acoustic metamaterial 510, so that the noise elimination area can be spliced and extended, and the noise elimination effect can be more uniformly refined.
Further, in the present embodiment, the extension pipe sound damping unit 511 includes a sound damping chamber 512 extending in the thickness direction of the extension pipe acoustic metamaterial 510, and an extension pipe 513 extending into the interior of the sound damping chamber 512, a space is provided between the wall of the sound damping chamber 512 and the wall of the extension pipe 513, and a sound damping through hole 514 is provided in the extension pipe 513. Wherein, the silencing through hole 514 in the extension pipe 513 comprises an upper end opening and a lower end opening, the upper end opening is positioned on the upper side surface of the extension pipe acoustic metamaterial piece 510 for noise to propagate into the silencing through hole 514, the lower end opening is positioned at the lower end of the extension pipe 513 opposite to the upper end opening, the noise can enter the silencing cavity 512 after passing through the lower end opening, and the energy of the noise can be gradually attenuated to disappear in the propagation process of the silencing through hole 514 and the silencing cavity 512, so that the beneficial effect of eliminating the noise is achieved.
More specifically, the sound wave enters the extension tube 513 during the propagation process, and the impedance of the propagation path of the sound wave is changed by the different cross-sectional areas of the extension tube 513, so that the sound wave is reflected in the extension tube 513, and energy is gradually consumed, thereby achieving the purpose of noise reduction.
Optionally, in this embodiment, the sound damping chambers 512 of at least two adjacent extension tube sound damping units 511 are connected, that is, at least two adjacent extension tubes 513 share the same sound damping chamber 512, and the number and distribution positions of the extension tubes 513 sharing the same sound damping chamber 512 can be set according to the actual sound damping requirement, so as to achieve the optimal sound damping effect, it can be understood that at least two adjacent extension tubes 513 share the same sound damping chamber 512, so that the distance between the two adjacent extension tubes can be reduced, and a reserved space is not required between the two adjacent extension tubes to set the chamber wall of the sound damping chamber 512, so that the distribution distance of the extension tubes 513 has a large value range.
Further, in the present embodiment, the extension pipe sound damping unit 511 satisfies at least one of the following conditions:
the depth d1 of the extension tube 513 is selected from the range of 5mm to 20mm;
the distance d2 between the end of the extension tube 513 at the sound-deadening chamber 512 and the end of the sound-deadening chamber 512 remote from the extension tube 513 is selected from the range of 5mm to 25mm;
the radius of the sound damping through hole 514 is selected from the range of 0.5mm to 5mm;
the perforation rate of the elongate tube acoustic metamaterial 510 is selected from the range of 3% to 20%.
In practical use, the various parameters included in the extension pipe silencing unit 511 are different in corresponding noise elimination frequency ranges when they take different values, and these parameter value ranges can be obtained from empirical values obtained in practical use. For different noise reduction frequencies, the extension tube acoustic metamaterial piece 510 can achieve the aim of effective noise reduction through the periodic arrangement of extension tubes with different size parameters. Influence of structural dimensional parameters of the extended-length acoustic metamaterial 510 on its sound absorption properties: along with the extension tube 513 d 1 The peak value of the sound absorption coefficient of the sound absorption pump is increased, and the peak value of the sound absorption coefficient of the sound absorption pump is moved to the low frequency; along with the extension tube 513 d 2 The peak value of the sound absorption coefficient thereof moves toward the low frequency, and the peak value of the sound absorption coefficient thereof changes. As R of the extension pipe 513 increases, its peak value of sound absorption coefficient moves toward high frequency and its absorptionThe peak value of the acoustic coefficient changes; as the penetration rate of the extension tube acoustic metamaterial 510 decreases, the peak sound absorption coefficient moves toward a lower frequency and the peak sound absorption coefficient changes.
In one embodiment, the extension pipe noise elimination unit 511, which selects parameter values in these ranges, can effectively eliminate noise of the range hood in the frequency range from 855Hz to 1024Hz, and can effectively and purposefully eliminate noise generated by the range hood 10 because the noise in the frequency range occupies a larger proportion of the total noise of the range hood 10. However, the present design is not limited thereto, and in other embodiments, the various parameters included in the extension pipe noise elimination unit 511 may take other numerical ranges.
The depth d1 of the extension pipe 513, i.e., the distance from the upper end to the lower end of the extension pipe 513, is selected from the range of 5mm to 20mm, that is, the depth d1 of the extension pipe 513 may be 5mm, 6mm, 9mm, 10mm, 12mm, 15mm, 18mm, 20mm, or other values of 5mm to 20mm, without being particularly limited thereto. In the illustrated embodiment, the depth d1 of the extension pipe 513 may be understood as the length of the sound damping through hole 514.
The distance d2 between the end of the extension pipe 513 located in the sound-deadening chamber 512 and the end of the sound-deadening chamber 512 remote from the extension pipe 513 is selected from the range of 5mm to 25mm, that is, the distance d2 between the end of the extension pipe 513 located in the sound-deadening chamber 512 and the end of the sound-deadening chamber 512 remote from the extension pipe 513 may be 5mm, 6mm, 9mm, 10mm, 12mm, 15mm, 18mm, 20mm, 25mm, or other values of 5mm to 25mm, without being particularly limited thereto.
The hole radius of the sound-deadening through hole 514 is selected from the range of 0.5mm to 5mm, that is, the hole radius of the sound-deadening through hole 514 may be 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, or other values of 0.5mm to 5mm, without being particularly limited thereto.
The perforation rate of the elongate tube acoustic metamaterial 510 is selected from the range of 3% to 20%, that is, the perforation rate of the elongate tube acoustic metamaterial 510 is selected from other values that may range from 3%, 6%, 9%, 12%, 15%, 18%, 20%, or 3% to 20%, without specific limitation herein.
In one embodiment, the extension pipe sound damping unit 511 satisfies all of the following conditions:
the depth of the extension tube 513 is selected from the range of 5mm to 20mm;
the distance between the end of the extension tube 513 at the sound-damping chamber 512 and the end of the sound-damping chamber 512 remote from the extension tube 513 is selected from the range of 5mm to 25mm;
the hole radius of the sound damping through hole 514 is selected from the range of 0.5mm to 5mm;
the perforation rate of the extension tube acoustic metamaterial is selected from the range of 3% to 20%.
In one embodiment, the extension pipe sound damping unit 511 satisfies the following condition of one or two or more combinations:
the depth of the extension tube 513 is selected from the range of 5mm to 20mm;
the distance between the end of the extension tube 513 at the sound-damping chamber 512 and the end of the sound-damping chamber 512 remote from the extension tube 513 is selected from the range of 5mm to 25mm;
the hole radius of the sound damping through hole 514 is selected from the range of 0.5mm to 5mm;
the perforation rate of the extension tube acoustic metamaterial is selected from the range of 3% to 20%.
Alternatively, in the present embodiment, the extension pipe acoustic metamaterial 510 includes a first sound damping unit module a and a second sound damping unit module B, and the frequency band of noise eliminated by the extension pipe sound damping unit 511 of the first sound damping unit module a is different from the frequency band of noise eliminated by the extension pipe sound damping unit 511 of the second sound damping unit module B.
Specifically, the first sound-damping unit module a and the second sound-damping unit each include an extension pipe sound-damping unit 511, wherein the extension pipe sound-damping unit 511 included in the first sound-damping unit module a has a different structural size from the extension pipe sound-damping unit 511 included in the second sound-damping unit module B, and these structural sizes specifically refer to various structural sizes including the extension pipe sound-damping unit 511. It can be appreciated that the first noise elimination unit module a and the second noise elimination unit module B can respectively eliminate noise in different frequency bands, so that the range of the noise frequency bands that can be eliminated by the extension pipe acoustic metamaterial 510 of the range hood 10 is wider.
Optionally, in this embodiment, at least two first silencing unit modules a and at least two second silencing unit modules B are configured, and the first silencing unit modules a and the second silencing unit modules B are distributed according to actual needs, so that the beneficial effect of better eliminating noise in different frequency bands in the whole silencing area range is achieved. Further alternatively, in this embodiment, the area of the first sound-damping unit module a and the area of the second sound-damping unit module B may be adjusted according to actual needs, so as to achieve an optimal sound-damping effect. However, the present design is not limited thereto, and in other embodiments, the extension pipe acoustic metamaterial 510 may further include more noise elimination unit modules besides the first noise elimination unit module a and the second noise elimination unit module B, and these noise elimination unit modules can eliminate noise in different frequency bands, respectively.
Further alternatively, in the embodiment shown in fig. 5, the first sound-damping unit module a and the second sound-damping unit module B are arranged in a distributed manner: the first silencing unit modules A and the second silencing unit modules B are sequentially and alternately arranged and distributed on the same surface to form four rows of silencing unit modules, and each row of silencing unit modules comprises three silencing unit modules. In the embodiment shown in fig. 6, two rows of first sound-damping unit modules a and two rows of second sound-damping unit modules B are alternately arranged in sequence, and each row of sound-damping unit modules includes three sound-damping unit modules. The structural dimensional parameters of the first and second sound-damping unit modules a and B are shown in the following table:
| d 1 (mm) | d 2 (mm) | d 3 (mm) | R(mm) | S 1 (mm 2 ) | S 2 (mm 2 ) | S 3 (mm 2 ) | |
| A | 8.00 | 7.50 | 6.00 | 0.70 | 1.54 | 36.00 | 31.48 |
| B | 8.00 | 7.50 | 6.00 | 0.70 | 1.54 | 49.00 | 44.48 |
wherein the meaning represented by each character is: a represents a first sound elimination unit module A; b represents a second sound elimination unit module B; d, d 1 、d 2 The meaning of this is shown with reference to fig. 3 and the associated description of the extension pipe sound damping unit 511 described above, d 3 The meaning of the expression is shown in figure 3, which shows the distance between the lower end of the extension tube and the upper side cavity wall surface of the sound-absorbing cavity; r represents a sound-deadening through hole514 radius; s is S 1 Represents the area of the cross section of the cavity 1 in FIG. 3, S 2 Represents the area of the cross section of the cavity 2 in FIG. 3, S 3 The area of the cross section of the cavity 3 in fig. 3 is shown.
Referring to fig. 2, in another embodiment, the sound attenuating structure 500 includes an acoustic diffuser 520, the acoustic diffuser 520 being disposed on an inner side of the condensation 400, the acoustic diffuser 520 being configured to reflect sound waves back into the working chamber 110. It will be appreciated that the noise propagates in air in the form of sound waves that are reflected by the acoustic diffuser 520 as they propagate to the acoustic diffuser 520, and that the reflected sound waves enter the working chamber 110 where they are then attenuated until eliminated by more emissions from the walls of the working chamber 110 and the components and structures disposed within the working chamber 110. Optionally, corresponding noise elimination components are disposed in the working chamber 110, and these components can absorb and eliminate the sound wave reflected in the working chamber 110, so as to achieve the purpose of secondary noise reduction, where these components include, but are not limited to, noise elimination cotton and the like.
Referring to fig. 2 and 7 together, further, in this embodiment, the acoustic diffuser 520 includes a plurality of right triangular prisms 521 that are connected in series, and the length values of the two right-angle sides of the cross section of the right triangular prisms 521 in the circumferential direction are adjusted to reflect the sound waves of different angles back to the working chamber 110. Specifically, the right triangular prism 521 includes two right-angle sides and an inclined plane, that is, the cross section of the right triangular prism 521 along the circumferential direction includes two right-angle sides and an inclined plane, when the lengths of the two right-angle sides change, the inclination angle of the inclined plane of the right triangular prism 521 will change correspondingly, that is, the inclination angle of the inclined plane of the right triangular prism 521 will also change, and the inclined planes of different inclination angles can reflect sound waves to different positions, and similarly, sound waves of different propagation angles can also reflect sound waves to the expected positions.
Further, in this embodiment, the length values of both right-angle sides of the cross section of the right-angle triangular prism 521 in the circumferential direction are respectively selected from the range of 20mm to 50mm.
Specifically, the length of a right-angle side is selected from the range of 20mm to 50mm, and may be 20mm, 30mm, 40mm, 50mm, or other values of 20mm to 50mm, without being particularly limited thereto. The length of the other leg is selected from the range of 20mm to 50mm, and may be 20mm, 30mm, 40mm, 50mm, or other values of 20mm to 50mm, without limitation. The length values of the two right-angle sides can be equal or unequal, and specific numerical values of the two right-angle sides can be adjusted according to actual needs. In practical use, the range of values selected from the length values of the two right-angle sides can enable the inclined plane of the right-angle triangular prism 521 to better reflect sound waves with different propagation angles into the working cavity 110, and the range of values of the length is obtained from empirical values obtained in practical use. However, the present design is not limited thereto, and in other embodiments, the length values of the two right-angle sides may be selected from other numerical ranges.
Alternatively, in this embodiment, the inclined surfaces of the at least two triangular prisms 521 are oriented differently, and it can be appreciated that, because the sound wave propagates in the form of waves when propagating in air, the sound wave propagates in the form of waves having multiple path angles and the acoustic diffusion plate, and the sound wave does not have a single source, the inclined surfaces of the at least two triangular prisms 521 are oriented differently from each other to reflect the sound wave having different propagation path angles.
Referring to fig. 1, 2 and 8, the range hood 10 further includes a honeycomb unit 210, the fan assembly 200 has an air inlet, and the honeycomb unit 210 is disposed at the air inlet; the honeycomb 210 includes a plurality of air inlet ducts 211 arranged at intervals, and the plurality of air inlet ducts 211 communicate with the working chamber 110 and the inner space of the fan assembly 200. The air flow enters the interior of the fan assembly 200 through the air inlet and is discharged to the environment outside the kitchen, particularly, when the air flow enters the fan assembly 200, the axial velocity distribution is generally uneven, large-scale vortex is generated, and a large amount of noise is generated, while the honeycomb 210 in the technical scheme comprises a plurality of air inlet pipelines 211, the air flow enters the space inside the fan assembly 200 through the air inlet pipelines 211, the air flow can become uniform and/or the turbulence degree can be reduced, and the beneficial effect of noise reduction is realized. In one embodiment, the fan assembly 200 includes components such as a volute, an impeller, and a motor, where the volute is provided with a main air inlet and a secondary air inlet, the main air inlet is located on the front side, and the secondary air inlet is located on the rear side, and it is understood that the air inlets are provided with two air inlets that can increase the efficiency of sucking gas of the fan assembly 200. However, the present design is not limited thereto, and in other embodiments, the number of the air inlets may be set to other values. In the illustrated embodiment, the honeycomb 210 is disposed at the primary air intake. Additionally, in other embodiments, the honeycomb 210 may be disposed at the secondary air intake, or at both the primary air intake and the secondary air intake.
Further, in the present embodiment, the cross section of the air intake duct 211 of the honeycomb unit 210 is configured as a hexagon, and the airflow loss coefficient and the airflow pressure loss of the grid of the hexagonal air intake duct 211 are small, which has the remarkable advantage of reducing the airflow turbulence. However, the present design is not limited thereto, and in other embodiments, the cross section of the air intake duct 211 of the honeycomb 210 may be configured in other shapes, including but not limited to rectangular, circular, etc.
Optionally, the cross sections of the air intake pipes 211 of the honeycomb units 210 are all hexagonal with a uniform cross section, that is, the dimensions of the cross sections of the air intake pipes 211 of the same honeycomb unit 210 are the same, it can be understood that the air flow flowing through the same honeycomb unit 210 can be more uniform and stable, thereby reducing the noise, and the honeycomb unit 210 can be manufactured conveniently. However, the present design is not limited thereto, and in other embodiments, the cross section of the air inlet pipe 211 of the honeycomb 210 may be hexagonal with different areas.
Further alternatively, in the present embodiment, the air intake duct 211 of the honeycomb unit 210 satisfies at least one of the following conditions:
the aperture of the air inlet pipe 211 is selected from the range of 6mm to 12mm;
the length of the air intake duct 211 is selected from the range of 5mm to 12mm;
the wall thickness of the air intake duct 211 is selected from the range of 0.1mm to 0.3mm.
In practical use, the air intake pipe 211 has different noise cancellation effects when various parameters are different, the parameter ranges are obtained from empirical values obtained in practical use, and the honeycomb 210 with the corresponding components selecting the parameter values in the ranges can effectively cancel the air flow noise. However, the present design is not limited thereto, and in other embodiments, the various parameters included in the air intake duct 211 may take other numerical ranges.
The aperture of the air intake duct 211 may refer to the maximum diameter of the air intake duct 211, and is selected from the range of 6mm to 12mm, that is, the aperture radius of the air intake duct 211 may be 6mm, 8mm, 10mm, 12mm, or other values of 6mm to 12mm, which are not particularly limited herein.
The length of the air intake duct 211 is selected from the range of 5mm to 12mm, that is, the length of the air intake duct 211 may be 5mm, 6mm, 8mm, 10mm, 12mm, or other values of 5mm to 12mm, which are not particularly limited herein.
The wall thickness of the air intake duct 211 is selected from the range of 0.1mm to 0.3mm, that is, the wall thickness of the air intake duct 211 may be 0.1mm, 0.2mm, 0.3mm, or other values of 0.1mm to 0.3mm, which are not particularly limited herein.
In one embodiment, the air intake duct 211 satisfies all of the following conditions:
the aperture of the air inlet pipe 211 is selected from the range of 6mm to 12mm;
the length of the air intake duct 211 is selected from the range of 5mm to 12mm;
the wall thickness of the air intake duct 211 is selected from the range of 0.1mm to 0.3mm.
In one embodiment, the air intake duct 211 satisfies one or a combination of two or more of the following conditions:
the aperture of the air inlet pipe 211 is selected from the range of 6mm to 12mm;
the length of the air intake duct 211 is selected from the range of 5mm to 12mm;
the wall thickness of the air intake duct 211 is selected from the range of 0.1mm to 0.3mm.
Still further alternatively, in certain embodiments, the air intake duct 211 of the honeycomb 210 satisfies at least one of the following conditions:
the aperture of the air inlet pipe 211 is configured to be 10mm;
the length of the air intake duct 211 is configured to be 10mm;
the wall thickness of the air intake duct 211 was set to 0.15mm.
In practical use, the air intake pipe 211 has different noise cancellation effects when various parameters are different, the parameter values are obtained from empirical values obtained in practical use, and the honeycomb 210 with the corresponding components selecting the parameter values in these ranges can effectively cancel the air flow noise. However, the present design is not limited thereto, and in other embodiments, various parameters included in the air intake duct 211 may take other values.
In one embodiment, the air intake duct 211 satisfies all of the following conditions:
the aperture of the air inlet pipe 211 is configured to be 10mm;
the length of the air intake duct 211 is configured to be 10mm;
the wall thickness of the air intake duct 211 was set to 0.15mm.
In one embodiment, the air intake duct 211 satisfies one or a combination of two or more of the following conditions:
the radius of the hole of the air inlet pipe 211 is configured to be 10mm;
the length of the air intake duct 211 is configured to be 10mm;
the wall thickness of the air intake duct 211 was set to 0.15mm.
Optionally, in this embodiment, the range hood 10 includes a damping net, where the damping net covers at least one side of the honeycomb 210, specifically, the damping net may cover an air intake side of the honeycomb 210, an air outlet side of the honeycomb 210, and may cover the air intake side and the air outlet side of the honeycomb 210. The present invention is not particularly limited herein. It will be appreciated that the damping net has the benefit of making the airflow therethrough more stable, so it can enhance the noise reduction benefit of the honeycomb 210.
Alternatively, honeycomb 210 may be coupled to blower assembly 200 by, but not limited to, a screw lock or snap-fit connection.
In the description of the present specification, reference to the terms "one embodiment," "some 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 present 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 (12)
1. A range hood, comprising:
the box body is internally provided with a working cavity;
the fan assembly is arranged in the working cavity;
the air inlet structure is connected with the box body and is provided with a smoking port;
the condensing piece is arranged at the smoking opening; and
and the silencing structure is arranged on the inner side surface of the condensing piece.
2. The range hood of claim 1, wherein the sound attenuating structure comprises an elongated tube acoustic metamaterial, the elongated tube acoustic metamaterial covers an inner side of the condensation member, and the elongated tube acoustic metamaterial comprises a plurality of elongated tube sound attenuating units arranged at intervals.
3. The range hood according to claim 2, wherein the extension pipe silencing unit comprises a silencing cavity extending in a thickness direction and an extension pipe extending into the silencing cavity, a space is arranged between a cavity wall of the silencing cavity and a pipe wall of the extension pipe, and a silencing through hole is arranged in the extension pipe.
4. A range hood according to claim 3, wherein the extension pipe sound damping unit fulfils at least one of the following conditions:
the depth of the extension tube is selected from the range of 5mm to 20mm;
the distance between the end of the extension tube located in the silencing cavity and the end of the silencing cavity far away from the extension tube is selected from the range of 5mm to 25mm;
the radius of the silencing through hole is selected from the range of 0.5mm to 5mm;
the elongate tube acoustic metamaterial piece has a perforation rate selected from the range of 3% to 20%.
5. A range hood according to claim 3, wherein the extension tube acoustic metamaterial comprises a first sound attenuating unit module and a second sound attenuating unit module, wherein the extension tube sound attenuating unit of the first sound attenuating unit module eliminates a different noise band than the extension tube sound attenuating unit of the second sound attenuating unit module.
6. The range hood of claim 1, wherein the sound attenuating structure includes an acoustic diffuser that covers an inner side of the condensation member, the acoustic diffuser being configured to reflect sound waves back into the working chamber.
7. The range hood of claim 6, wherein the acoustic diffuser comprises a plurality of right triangular prisms connected in sequence, and the length values of the two right-angle sides of the cross section of the right triangular prisms along the circumferential direction are adjusted to reflect sound waves with different angles back to the working chamber.
8. The range hood of claim 7, wherein the two right angle sides each have a length value selected from the range of 20mm to 50mm.
9. The range hood of claim 7, wherein the angular orientations of at least two of the right triangular prisms are different from each other.
10. The range hood of any one of claims 1 to 9, further comprising a honeycomb device, the fan assembly having an air inlet, the honeycomb device being disposed at the air inlet; the honeycomb device comprises a plurality of air inlet pipelines which are arranged at intervals, and the air inlet pipelines are communicated with the working cavity and the inside of the fan assembly.
11. The range hood of claim 10, wherein the cross section of the air intake duct is hexagonal.
12. The range hood of claim 10, wherein the air inlet duct meets at least one of the following conditions:
the aperture of the air inlet pipeline is selected from the range of 6mm to 12mm;
the length of the air inlet pipeline is selected from the range of 5mm to 12mm;
the pipe wall thickness of the air inlet pipe is selected from the range of 0.1mm to 0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210313903.XA CN116857689A (en) | 2022-03-28 | 2022-03-28 | Fume exhaust fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210313903.XA CN116857689A (en) | 2022-03-28 | 2022-03-28 | Fume exhaust fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116857689A true CN116857689A (en) | 2023-10-10 |
Family
ID=88220345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210313903.XA Pending CN116857689A (en) | 2022-03-28 | 2022-03-28 | Fume exhaust fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116857689A (en) |
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2022
- 2022-03-28 CN CN202210313903.XA patent/CN116857689A/en active Pending
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