CN114562751B - Noise reduction element and smoke exhaust ventilator - Google Patents
Noise reduction element and smoke exhaust ventilator Download PDFInfo
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- CN114562751B CN114562751B CN202011364750.9A CN202011364750A CN114562751B CN 114562751 B CN114562751 B CN 114562751B CN 202011364750 A CN202011364750 A CN 202011364750A CN 114562751 B CN114562751 B CN 114562751B
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- 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
Abstract
The application discloses a noise reduction element and a range hood, wherein the noise reduction element comprises at least one noise reduction structure, the noise reduction structure comprises a plurality of baffles, the baffles are overlapped and arranged in a first direction, and a serpentine channel is formed among the baffles; the noise reduction structure is formed with a first port and a second port which are arranged at intervals in the first direction, and the channel is communicated with the first port and the second port. The noise reduction element can directly cut off noise on a sound propagation path.
Description
Technical Field
The application relates to the field of household appliances, in particular to a noise reduction element and a smoke exhaust ventilator.
Background
The existing noise elimination technology mainly comprises sound absorption treatment, sound insulation treatment and the like, wherein the sound absorption treatment comprises the use of sound absorption materials or sound absorption structures for absorbing sound, so that the noise intensity is reduced; the sound insulation treatment utilizes the rigidity characteristic of the material to enable sound waves to be reflected on the sound insulation member, so that the purpose of resisting sound wave energy transmission is achieved. However, the existing absorption treatment and sound insulation treatment cannot directly cut off noise on a sound propagation path, so that the noise reduction effect is poor.
Disclosure of Invention
The application provides a noise reduction element and smoke ventilator to solve current absorption processing, sound insulation processing unable direct cut off the noise on the sound propagation path directly.
For solving the above technical problem, the present application proposes a noise reduction element, which includes at least one noise reduction structure, the noise reduction structure includes: a plurality of baffles arranged in a stacked manner in a first direction, and a serpentine channel is formed between the plurality of baffles; the noise reduction structure is formed with a first port and a second port which are arranged at intervals in the first direction, and the channel is communicated with the first port and the second port.
The number of the noise reduction structures is at least two, and the second ports of the at least two noise reduction structures are arranged oppositely, so that fluid enters from the first port of one noise reduction structure, and then enters from the second port of the other noise reduction structure, and the fluid exits from the first port.
Wherein, the noise reduction structure further includes: the two side plates are arranged at intervals, the baffle is connected to one side plate and is arranged at intervals with the other side plate, and a first through hole, a second through hole or a channel is formed between the baffle and the side plate at intervals.
Wherein, the curb plate is shared between the adjacent noise reduction structure.
Wherein the baffle is an arc baffle; the cross section of the noise reduction structure formed by stacking and arranging a plurality of baffles is a sector along the vertical plane of the baffle main plane, the cross section of the noise reduction element formed by opposite arrangement of at least two noise reduction structures is circular or elliptical, and the cross section of the noise reduction structure and the cross section of the noise reduction element are along the vertical plane of the baffle main plane.
The first through hole is provided with a blocking rib for blocking fluid from being transferred in a second direction, and the second direction is perpendicular to the first direction.
Wherein, the interval between the baffle that sets up adjacently in the first direction is greater than 2mm and is less than 15mm.
For solving above-mentioned technical problem, this application provides a smoke ventilator, smoke ventilator include foretell noise reduction component.
The smoke exhaust ventilator comprises an upper frame and a lower frame which are communicated, wherein a fan is arranged in the upper frame, and a smoke exhaust port is arranged on the lower frame; the number of the noise reduction elements is at least one, and the noise reduction elements are arranged between the upper frame and the lower frame.
The ratio of the orthographic projection area of the noise reduction element on the surface of the smoke extraction opening to the area of the smoke extraction opening is more than or equal to 30 percent and less than or equal to 60 percent.
The noise reduction element comprises at least one noise reduction structure, wherein the noise reduction structure comprises a plurality of baffles which are overlapped and arranged in a first direction, and a serpentine channel is formed between the baffles; the noise reduction structure is formed with a first port and a second port which are arranged at intervals in the first direction, and the channel is communicated with the first port and the second port. In this way, the noise reduction element can cut off noise directly on the sound propagation path.
Drawings
For a clearer description of the technical solutions in the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
FIG. 1 is a schematic perspective view of a noise reduction element of the present application;
FIG. 2 is a schematic view of the structure of FIG. 1A;
FIG. 3 is a schematic view of the range hood of the present application;
FIG. 4 is a partial schematic view of the range hood of FIG. 3;
fig. 5 is another partial schematic view of the range hood of fig. 3.
Reference numerals: 1. a noise reduction structure; 11. a baffle; 12. a channel; 13. a side plate; 2. a first port; 3. a second port; 4. a blocking rib; 100. a noise reduction element; 200. fume extractor; 2001. an upper frame; 2002. a lower frame; 20021. a smoke extraction port; 2003. a blower; 2004. a connecting plate; 20041. connecting ribs; 2005. and a vent.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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 at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The following describes a noise reduction element and a range hood provided by the invention in detail with reference to embodiments.
Referring to fig. 1 and 2, fig. 1 is a schematic perspective view of a noise reduction element of the present application; fig. 2 is a schematic diagram of the structure of fig. 1 a.
The noise reduction element 100 in this embodiment can be used to reduce noise in fluid, such as oil smoke, to cut off noise, and is suitable for use in environments where noise reduction is required. The noise reduction element 100 includes the noise reduction structures 1, and the number of the noise reduction structures 1 may be one or more, and is set according to practical situations, which is not limited herein.
Specifically, the noise reduction structure 1 includes one or more baffles 11, which baffles 11 are arranged one above the other in the first direction and then form a serpentine channel 12 so that sound waves are transmitted in the channel 12. The serpentine shape refers to the curved, curvedly extending shape of the channel 12, as indicated by the dashed arrow a in fig. 2. The first direction is the direction indicated by X in fig. 1, and is the same as the sound propagation path.
Meanwhile, the noise reduction structure 1 is provided with a first port 2 and a second port 3 at intervals in a first direction, and the first port 2 is communicated with the channel 12 and is used for enabling sound waves to enter the channel 12 of the noise reduction structure 1 from the first port 2; the second port 3 communicates with the channel 12 for sound waves to pass out of the channel 12 to the second port 3. That is, fluid enters from the first port 2 in the noise reduction structure 1, passes through the serpentine channel 12 and then is transmitted out from the second port 3, and the transmitted fluid sound and the sound wave of the external transmission sound have strong coupling action, so that the generation of an acoustic transmission forbidden band is caused, and the effects of sound insulation and noise reduction are achieved. Wherein the path of the fluid sound motion is as indicated by the dashed arrow a in fig. 2.
The noise reduction structure 1 in the noise reduction element 100 may be any number. For example, when the noise reduction element 100 includes only one noise reduction structure 1, the first port 2 of the noise reduction structure 1 corresponds to a sound propagation inlet, and the second port 3 is a sound propagation outlet.
When the noise reduction element 100 comprises two noise reduction structures 1, adjacent noise reduction structures 1 may be arranged in parallel combination, and fluid sound enters from the first through openings 2 and is transmitted from the second through openings 3 of the corresponding noise reduction structures 1, respectively. The adjacent noise reduction structures 1 may be arranged oppositely, for example, the second port 3 of one noise reduction structure 1 corresponds to the first port 2 of the other noise reduction structure 1, wherein fluid sound is transmitted from the first port 2, the second port 3, the second port 2 of the other noise reduction structure 1 and the first port 2 of the other noise reduction structure 1 sequentially passing through the first port 2, the second port 3 and the other noise reduction structure 1 of the first noise reduction structure 1.
In addition, the noise reduction elements 100 may be formed in any of various shapes by combining the noise reduction structures 1, for example, the number of the noise reduction structures 1 is two or more, and the plurality of noise reduction structures 1 may be arranged in a plane, wherein the plane is arranged perpendicular to the first direction. Or elliptical columns or square columns and the like are formed between the adjacent noise reduction structures 1 in a surrounding mode.
In an actual process, in order to further improve the noise reduction effect of the noise reduction element 100, the noise reduction element 100 may be directly disposed on the sound propagation path, so as to directly cut off noise, so as to improve the noise reduction effect of the noise reduction element 100.
When the number of the noise reduction structures 1 in the noise reduction element 100 is plural, in order to reduce the volume of the noise reduction element 100 and prolong the fluid sound transmission path, when the number of the noise reduction structures 1 in the present embodiment is two or more, the second ports 3 of the noise reduction structures 1 are oppositely arranged, so that the fluid sound enters from the first port 2 of one noise reduction structure 1 and is transmitted from the second port 3; and then fluid sound enters from the second port 3 of the other noise reducing structure 1 and exits from the first port 2. The plurality of noise reduction structures 1 are oppositely arranged, so that the occupied volume of the noise reduction element 100 on a plane is reduced, and the noise reduction element 100 is compact in structure; meanwhile, the fluid sound must pass through at least two noise reduction structures 1, so that the sound transmission path is lengthened, and the amplitude value phase of the sound wave is changed, thereby counteracting the sound outside the noise reduction element 100, and achieving the noise reduction effect.
When the number of the noise reduction structures 1 is plural, the internal structures in the noise reduction structures 1 are the same, and the noise reduction structures 1 perform noise reduction processing on the same specific sound wave. When the plurality of noise reduction structures 1 are at least partially different, the same noise reduction structure 1 can perform noise reduction processing on the same specific sound wave, different noise reduction structures 1 respectively perform noise reduction processing on different sounds, and the plurality of different noise reduction structures 1 are combined, so that the noise reduction processing range of the sound wave can be enlarged.
Thus, the noise reduction element 100 may select the corresponding noise reduction structure 1 according to different application scenarios. For example, when only a specific small range of sound waves needs to be noise-reduced in an application scenario, the noise reduction structures 1 in the noise reduction element 100 may be all configured to improve the specific sound wave noise reduction. When the noise reduction processing needs to be performed on the sound wave in a larger range in an application scenario, the plurality of noise reduction structures 1 in the noise reduction element 100 are all set differently, so as to improve the noise reduction processing performed on the sound wave in the larger range.
Further, the noise reduction structure 1 includes two side plates 13, the two side plates 13 are arranged at intervals, wherein the two side plates 13 are respectively used for connecting a plurality of baffle plates 11, the baffle plates 11 are connected to one side plate 13 and are arranged at intervals with the other side plate 13, and the plurality of baffle plates 11 and the two side plates 13 form a first through hole 2, a second through hole 3 and a serpentine channel 12 at intervals in the above manner.
The plurality of baffles 11 may be disposed adjacently and alternately in the first direction, that is, one baffle 11 is disposed on one side plate 13, and the other baffle 11 adjacent thereto is disposed on the other side plate 13, as shown in fig. 2. A baffle 11 is connected to one side plate 13 and is arranged at intervals from the other side plate 13; the adjacent other baffle 11 is connected to the other side plate 13 and is disposed at a distance from the one baffle 11, that is, a plurality of baffles 11 are sequentially stacked and arranged between the two baffles 11 to form a channel 12.
Of course, when one or two of the plurality of baffles 11 are disposed on one side plate 13, one or more baffles 13 disposed adjacent to the one or two baffles 11 are disposed on the other baffle 13, that is, the plurality of baffles 11 are not disposed adjacently in the first direction, so long as the serpentine channel 12 can be formed, which is not limited herein.
Specifically, one noise reduction structure 1 and another adjacent noise reduction structure 1 share one side plate 13, so that a plurality of baffles 11 in the other noise reduction structure 1 are arranged on the side plate 13, thereby not only reducing the manufacturing cost, but also ensuring compact structure, and the noise reduction elements 100 are easy to be combined into different shapes so as to be suitable for different noise reduction environments. When the noise reduction element 100 includes two noise reduction structures 1, the two noise reduction structures 1 may be symmetrically disposed therebetween when the two noise reduction structures 1 share one side plate 13.
When fluid sound enters the serpentine channel 12 from the noise reduction structure 1, the baffles 11 can block sound transmission in the sound wave transmission process, and additional noise can be formed between the sound and the baffles, so that in order to reduce flow resistance in the sound transmission process, the baffles 11 are further arranged in an arc shape to form the serpentine channel 12, so that the sound is transmitted along the surface of the serpentine channel 12, direct collision is reduced, and then sound wave blocking and sound flow resistance are reduced.
Since the above-mentioned one noise reduction structure 1 shares one side plate 13 with the adjacent other noise reduction structure 1; meanwhile, the baffles 11 are arc-shaped and are arc-shaped baffles. In order to further reduce the occupied volume of the noise reduction element 100, the cross section of the noise reduction structure formed by stacking and arranging the plurality of baffles 11 along the vertical plane of the principal plane of the plurality of baffles 11 is in a fan shape, wherein the extending length of the plurality of baffles 11 is gradually reduced or gradually increased, and two side plates 13 are radially arranged at the side parts of the plurality of baffles 11. The cross section of the noise reduction element 100 formed by the opposite arrangement of at least two noise reduction structures is circular or elliptical, wherein the cross section of the noise reduction structure 1 and the cross section of the noise reduction element 100 are along the vertical plane of the principal plane of the baffle 11.
The circular or elliptical noise reduction element 100 is compact in structure and small in volume, and integrates a plurality of noise reduction structures 1, when sound is transmitted from one end of the noise reduction element 100 to the opposite end of the noise reduction element 100, the sound must pass through at least two noise reduction structures 1, so that a sound transmission path is prolonged, the phase of an amplitude value of sound waves is changed, and the sound is counteracted with sound outside the noise reduction element 100, so that a noise reduction effect is achieved.
For example, when the noise reduction element 100 is cylindrical, the noise reduction structure 1 in the noise reduction element 100 may change the longitudinal cross-section parameters, wherein the longitudinal cross-section parameters may be the outer diameter R of the noise reduction structure 1, the number N of channels 12, the number Mi of layers of the baffle 11, the thickness t of the baffle 11, and the radius R of the central cavity, that is, by changing the sizes of R, N, mi, t and R, the structure of the noise reduction structure 1 is further changed, so as to perform noise reduction treatment on sound waves with different frequencies. The central cavity is a hollow cylinder formed by surrounding a plurality of noise reduction structures 1.
The number N of the channels 12 may be one, two or more. The fan-shaped central angles thetai corresponding to the cross section area occupied by the ith noise reduction structure 1 can be equal or unequal in different noise reduction structures 1. The number of layers Mi of the baffle plates 11 in the ith noise reduction structure 1 is at least 3, and can be 4, 5 or more, and the number of layers of the baffle plates 11 in each noise reduction structure 1 can be the same or different.
As shown in fig. 2, the number n=6 of channels 12 corresponds to the central angles θi of: 80 °,40 °,80 °,40 °,80 °,40 °. Other longitudinal cross-sectional geometry parameters were r=31 mm, r=8 mm, t=1 mm, number of fold layers m1=m2=m3=m4=m5=m6=6. From this, it is apparent that the structure of the noise reduction element 100 can be adjusted to perform noise reduction processing on sound waves of different frequencies by changing the magnitudes of R, N, mi, t and r.
In an embodiment, a rib 4 is provided at the first through hole 2, wherein the rib 4 is arranged to block sound from being transmitted along the noise reduction element 100 in a second direction, wherein the second direction is arranged perpendicular to the first direction. Meanwhile, the rib 4 is arranged on the noise reduction structure 2, so that the rigidity and manufacturability of the noise reduction structure 1 can be improved, and the overall rigidity of the noise reduction element 100 can be improved. The number of the ribs 4 may be plural, and the plurality of ribs 4 may be arranged on the noise reduction structure 1 at intervals, and the number and arrangement intervals are set according to actual situations, which is not limited herein. The second direction is indicated by an arrow Y shown in fig. 1, where the second direction is perpendicular to the first direction.
In practice, when sound waves enter the channels 12 and 3 from the first port 2, they may be transmitted along the second direction, and in order to further block the sound from being transmitted along the noise reduction element 100 along the second direction, the ribs 4 are also disposed at the channels 12 and 3, so as to block the sound from being transmitted along the noise reduction element 100 along the second direction. The length of the rib 4 extending in the second direction may be set according to the actual situation, and is not limited herein.
Further, in order to improve the noise reduction effect of the noise reduction element 100 and to facilitate the manufacturing of the noise reduction element 100, the noise reduction effect is improved by changing the pitch of the adjacent baffle plates 11 in the present embodiment. Specifically, the interval between the baffles 11 adjacently disposed in the first direction is set to be greater than or equal to 2mm and less than or equal to 15mm. The above-mentioned intervals between the adjacent baffles 11 may be 2mm, 5mm, 8mm, 9mm, 15mm, etc.
In order to further improve the noise reduction effect of the noise reduction element 100 while satisfying the consistency of the first and second through holes 2 and 3 with the channel 12, the noise reduction effect is improved by changing the intervals between the first and second through holes 2 and 3 and the side plates 13 and the baffle 11 in this embodiment, and the processing is facilitated. Specifically, the intervals between the first port 2, the second port 3, and the side plate 13 and the baffle 11 are set to be 4mm or more and 10mm or less, respectively, in the present embodiment. The above-mentioned intervals may be 4mm, 5mm, 8mm, 9mm, 10mm, etc.
The noise reduction element comprises at least one noise reduction structure, wherein the noise reduction structure comprises a plurality of baffles which are overlapped and arranged in a first direction, and a serpentine channel is formed among the baffles; the noise reduction structure is formed with a first port and a second port which are arranged at intervals in the first direction, and the channel is communicated with the first port and the second port. In this way, the noise reduction element can cut off noise directly on the sound propagation path.
Referring to fig. 3, 4 and 5, fig. 3 is a schematic structural view of the range hood of the present application; FIG. 4 is a partial schematic view of the range hood of FIG. 3; fig. 5 is another partial schematic view of the range hood of fig. 3.
When the smoke exhaust ventilator 200 works, the noise of the smoke exhaust ventilator 200 mainly has three transmission paths, the first path is the noise radiated by the metal plate, and the noise transmitted by the noise is small; the second path is the vortex pneumatic noise generated in the air duct; the third path is the noise of the fan 2003, which is transmitted outwards through the duct and the grill structure, wherein the noise sound of the third path is the largest, and efficient ventilation needs to be ensured to ensure the fume suction effect.
The range hood 200 in this embodiment includes the noise reduction element 100, and the noise reduction effect of the range hood 200 is well achieved by the noise reduction element 100. It should be noted that, in the present embodiment, the noise reduction element 100 is the noise reduction element 100 described in the above embodiment, and will not be described herein.
Specifically, the range hood 200 includes an upper frame 2001 and a lower frame 2002, the upper frame 2001 and the lower frame 2002 are in conductive arrangement, and the lower frame 2002 is provided with a smoke extraction port 20021 for the passage of smoke. A fan 2003 is provided in the upper housing 2001, the fan 2003 being used to extract oil smoke from the smoke extraction port 20021.
Because after the fan 2003 and the air duct structure of the smoke ventilator 200 are determined, the noise frequency characteristics of the smoke ventilator 200 at different rotation speeds are also kept unchanged, and therefore, in the embodiment, the noise reduction element 100 is arranged on the motion path of the smoke ventilator 200, and the noise transmission can be directly cut off without changing the original structure of the smoke ventilator 200, so that the noise reduction effect is achieved, effective ventilation and heat dissipation can be realized, and further the user experience of the smoke ventilator 200 is improved.
The noise reduction element 100 may be one or more. For example, when the noise reduction element 100 is one, the noise reduction element 100 is used for noise reduction of sound, and the noise reduction element 100 is externally used for oil smoke passing, wherein all the noise reduction structures 1 in the noise reduction element 100 may be identical or at least partially different.
When the plurality of noise reduction elements 100 are provided, the structures may all be the same or at least partially different, wherein when adjacent noise reduction elements 100 are different, the number of noise reduction structures 1 may be different or the parameters of the longitudinal cross section of the noise reduction structures 1 may be different. A vent 2005 is formed between the plurality of adjacent noise reduction elements 100, the plurality of noise reduction elements 100 are used for noise reduction treatment of sound, and the vent 2005 is used for oil smoke passing.
I.e., the structure of the noise reduction element 100 in the range hood 200 depends on the actual application scenario. Meanwhile, no matter the number of the noise reduction elements 100 is one or more, the ventilation requirement of the smoke exhaust ventilator 200 can be met, the noise transmitted outwards by the smoke exhaust ventilator 200 can be reduced, the noise of the smoke exhaust ventilator 200 is effectively reduced, and the user experience of the smoke exhaust ventilator 200 is improved.
Because the structures of the adjacent noise reduction elements 100 can be different, the noise reduction elements 100 comprise a plurality of different noise reduction structures 1, and the structure of the noise reduction structures 1 can be changed by changing the geometric parameters in the noise reduction structures 1 so as to adapt to the noise distribution of the smoke exhaust ventilator 200, and the noise can be effectively eliminated.
Specifically, the noise reduction element 100 may be disposed at an air inlet and/or an air outlet of the blower 2003, or the noise reduction element 100 may be disposed between the upper frame 2001 and the lower frame 2002. In practice, the noise reduction element 100 is preferably disposed between the upper frame 2001 and the lower frame 2002 due to the positional space limitation between the blower 2003 and the upper frame 2001.
The noise reduction element 100 may be mounted directly between the upper housing 2001 and the lower housing 2002 at the air inlet and/or outlet of the fan 2003. Of course, the noise reduction element 100 may also be mounted on the outer frame 2004, and then mounted on the range hood 200 at a corresponding position through the outer frame 2004, so as to enhance the mounting strength of the noise reduction element 100, and also facilitate the mounting of the noise reduction element 100 as a whole on the range hood 200. When the noise reduction elements 100 are plural, adjacent noise reduction elements 100 are mounted on the outer frame 2004 at a pitch for forming the above-described ventilation ports 2005.
Further, the two ends of the noise reduction element 100 are respectively provided with an outer frame 2004, and the outer sides of the outer frames 2004 are respectively provided with connecting ribs 20041, that is, the outer frames 2004 are installed in the range hood 200 through the connecting ribs 20041. Meanwhile, the connecting ribs 20041 can improve the strength and rigidity of the outer frame 2004. Wherein the connecting ribs 20041 are horizontally arranged.
The noise reduction element 100 may be made of metal plate, glass, etc., and the noise reduction element 100 made of the material is not only installed with high temperature resistance, but also can reduce environmental pollution, so as to be suitable for the range hood 200.
Specifically, when one or more noise reduction elements 100 are installed in the range hood 200, the ratio of the area of the orthographic projection of the noise reduction element 100 on the surface where the smoke exhaust port 20021 is located to the area of the smoke exhaust port 20021 is greater than or equal to 30% and less than or equal to 60%, so as to avoid influencing the air intake of the range hood 200 due to the excessive area of the noise reduction element 100; to avoid affecting the noise reduction effect of the range hood 200 due to the excessively small area of the noise reduction element 100. The ratio of the area of the noise reduction element 100 to the area of the smoke evacuation port 20021 may be 30%, 40%, 45%, 60%.
If the radius of the cylindrical noise reduction element 100 is R, the distance between adjacent noise reduction elements 100 is d, and the ratio of the area of the orthographic projection of the noise reduction element 100 on the surface of the smoke evacuation port 20021 to the area of the smoke evacuation port 20021 is f, where f=pi R 2 2Rd, 30% of<f<60％。
The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the patent application, and all equivalent structures or equivalent processes using the descriptions and the contents of the present application or other related technical fields are included in the scope of the patent application.
Claims (7)
1. A noise reduction element, the noise reduction element comprising at least one noise reduction structure, the noise reduction structure comprising:
a plurality of baffles arranged in a stacked manner in a first direction, between which a serpentine channel is formed;
the noise reduction structure is provided with a first port and a second port which are arranged at intervals in the first direction, and the channel is communicated with the first port and the second port;
the two side plates are arranged at intervals, the baffle is connected to one side plate and is arranged at intervals with the other side plate, and the interval between the baffle and the side plate forms the first through hole, the second through hole or the channel;
the baffle is an arc-shaped baffle; the cross section of the noise reduction structure formed by stacking and arranging a plurality of baffles is a sector shape along the vertical plane of the baffle main plane, the cross section of the noise reduction element formed by opposite arrangement of at least two noise reduction structures is a circle or an ellipse, and the cross section of the noise reduction structure and the cross section of the noise reduction element are both along the vertical plane of the baffle main plane;
the number of the noise reduction structures is at least two, and the second ports of the at least two noise reduction structures are oppositely arranged, so that fluid enters from the first port of one noise reduction structure and is transmitted from the second port of the other noise reduction structure, and then enters from the second port of the other noise reduction structure and is transmitted from the first port of the other noise reduction structure.
2. The noise reduction element of claim 1, wherein the side plates are shared between adjacent noise reduction structures.
3. The noise reduction element of claim 1, wherein the first port is provided with a rib for blocking the transfer of the fluid in a second direction, the second direction being perpendicular to the first direction.
4. The noise reduction element of claim 1, wherein a spacing between the baffles disposed adjacent in the first direction is greater than 2mm and less than 15mm.
5. A range hood comprising the noise reduction element of any one of claims 1-4.
6. The range hood according to claim 5, wherein the range hood comprises an upper frame and a lower frame which are communicated, a fan is arranged in the upper frame, and a smoke extraction port is arranged on the lower frame; the number of the noise reduction elements is at least one, and the noise reduction elements are arranged between the upper rack and the lower rack.
7. The range hood of claim 6, wherein the ratio of the area of the orthographic projection of the noise reduction element on the surface of the smoke evacuation port to the area of the smoke evacuation port is 30% or more and 60% or less.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011364750.9A CN114562751B (en) | 2020-11-27 | 2020-11-27 | Noise reduction element and smoke exhaust ventilator |
| PCT/CN2021/129645 WO2022111281A1 (en) | 2020-11-27 | 2021-11-09 | Noise reduction element and range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011364750.9A CN114562751B (en) | 2020-11-27 | 2020-11-27 | Noise reduction element and smoke exhaust ventilator |
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| Publication Number | Publication Date |
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| CN114562751A CN114562751A (en) | 2022-05-31 |
| CN114562751B true CN114562751B (en) | 2023-05-05 |
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| CN202011364750.9A Active CN114562751B (en) | 2020-11-27 | 2020-11-27 | Noise reduction element and smoke exhaust ventilator |
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| WO (1) | WO2022111281A1 (en) |
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| CN114623476A (en) * | 2022-02-10 | 2022-06-14 | 海信(山东)厨卫有限公司 | Fume exhaust fan |
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| CN109340191A (en) * | 2018-09-27 | 2019-02-15 | 佛山市顺德区美的洗涤电器制造有限公司 | Muffler and kitchen ventilator |
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| IT1392895B1 (en) * | 2009-02-19 | 2012-04-02 | Ask Ind Societa Per Azioni | SILENCER MODULE FOR FUME SUCTION HOOD. |
| US20120108160A1 (en) * | 2010-11-03 | 2012-05-03 | Hobart Brothers Company | Heating, ventilating, air conditioning, and refrigeration noise reduction system |
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| CN109780590A (en) * | 2017-11-10 | 2019-05-21 | 宁波方太厨具有限公司 | A kind of denoising device and application have the range hood of the denoising device |
| WO2019117141A1 (en) * | 2017-12-11 | 2019-06-20 | 富士フイルム株式会社 | Range hood |
| CN110895923B (en) * | 2018-09-13 | 2022-03-18 | 南京大学 | Sub-wavelength broadband metamaterial absorber for controlling low-frequency noise |
| CN110939960A (en) * | 2018-09-22 | 2020-03-31 | 宁波方太厨具有限公司 | Range hood with noise reduction structure |
| CN109340192B (en) * | 2018-09-27 | 2021-05-25 | 佛山市顺德区美的洗涤电器制造有限公司 | Fume exhaust fan |
| CN111288655A (en) * | 2018-12-06 | 2020-06-16 | 青岛经济技术开发区海尔热水器有限公司 | Noise reduction device and gas water heater |
| CN110047458B (en) * | 2019-03-26 | 2021-02-26 | 西安交通大学 | Sound absorption unit, sound absorption structure and sound absorption method |
-
2020
- 2020-11-27 CN CN202011364750.9A patent/CN114562751B/en active Active
-
2021
- 2021-11-09 WO PCT/CN2021/129645 patent/WO2022111281A1/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340191A (en) * | 2018-09-27 | 2019-02-15 | 佛山市顺德区美的洗涤电器制造有限公司 | Muffler and kitchen ventilator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114562751A (en) | 2022-05-31 |
| WO2022111281A1 (en) | 2022-06-02 |
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