CN114023292A - Noise reduction device and tabletop smoke machine - Google Patents
Noise reduction device and tabletop smoke machine Download PDFInfo
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- CN114023292A CN114023292A CN202111346959.7A CN202111346959A CN114023292A CN 114023292 A CN114023292 A CN 114023292A CN 202111346959 A CN202111346959 A CN 202111346959A CN 114023292 A CN114023292 A CN 114023292A
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- 239000000779 smoke Substances 0.000 title description 6
- 238000010521 absorption reaction Methods 0.000 claims abstract description 23
- 238000005192 partition Methods 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims 6
- 238000004140 cleaning Methods 0.000 claims 1
- 235000019504 cigarettes Nutrition 0.000 abstract description 19
- 230000008030 elimination Effects 0.000 abstract description 2
- 238000003379 elimination reaction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000746 purification Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 235000021168 barbecue Nutrition 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention provides a noise reduction device and a table top cigarette machine, relates to the technical field of kitchen electrical equipment, and aims to optimize the structure of the noise reduction device to a certain extent and improve the noise reduction and elimination capability of the table top cigarette machine. The invention provides a noise reduction device, which comprises an air box, a first noise reduction component, a second noise reduction component and a first sound absorption component, wherein the air box is provided with a first air inlet and a second air inlet; the first noise reduction component and the second noise reduction component are uniformly distributed with through holes, the first noise reduction component divides the inside of the air box into an accommodating cavity and a sound absorbing cavity, and the second noise reduction component is arranged in the sound absorbing cavity; one side of the second noise reduction component facing the first noise reduction component and the inner wall surfaces of the first noise reduction component and the air box are enclosed to form a first noise reduction cavity, and the first noise absorption component is arranged in the first noise reduction cavity; one side of the second noise reduction component departing from the first noise reduction component and the inner wall surface of the air box are enclosed to form a second noise reduction cavity.
Description
Technical Field
The invention relates to the technical field of kitchen electrical equipment, in particular to a noise reduction device and a table top smoke machine.
Background
With the development of cooking appliances, people can realize cooking modes such as frying, roasting, hot pot and the like at home. However, since the frying and roasting can generate heavy oil smoke and the hot pot can generate heavy taste, the frying and roasting at home and the hot pot are convenient, but have great influence on the indoor air environment.
The table top cigarette machine can eliminate the table top cigarette machine peculiar smell that culinary art modes such as barbecue, chafing dish brought, promotes to have a dinner and experiences. But because the desktop cigarette machine is put on the dining table, it is nearer apart from the personnel of having a dinner, the noise that the desktop cigarette machine produced can greatly reduce the experience of having a dinner of user.
Therefore, it is urgently needed to provide a noise reduction device and a table top cigarette machine so as to solve the problems in the prior art to a certain extent.
Disclosure of Invention
The invention aims to provide a noise reduction device and a table top cigarette machine, so that the structure of the noise reduction device is optimized to a certain extent, and the noise reduction and elimination capability of the table top cigarette machine is improved.
The invention provides a noise reduction device, which comprises an air box, a first noise reduction component, a second noise reduction component and a first sound absorption component, wherein the air box is provided with a first air inlet and a second air inlet; perforations are distributed on the first noise reduction component and the second noise reduction component, the first noise reduction component divides the inside of the air box into an accommodating cavity and a sound absorbing cavity, and the second noise reduction component is arranged in the sound absorbing cavity; a first noise reduction cavity is formed by enclosing one side of the second noise reduction component facing the first noise reduction component and the inner wall surfaces of the first noise reduction component and the air box, and the first noise absorption component is arranged in the first noise reduction cavity; and a second noise reduction cavity is formed by enclosing one side of the second noise reduction component, which deviates from the first noise reduction component, and the inner wall surface of the air box.
Wherein the first noise reduction member is of an arc-shaped structure, and the perforation rate of the perforations on the first noise reduction member is 50-90%.
Specifically, the second noise reduction member is disposed along a tangential direction within the first noise reduction member, and the second noise reduction member is tangent to the first noise reduction member to form two first noise reduction cavities on either side of the first noise reduction member.
Wherein the second noise reduction member is of an arc structure, and the perforation rate of the perforations on the second noise reduction member is 50-90%; the first sound absorbing member is adapted to the shape and size of the first noise reduction chamber.
Specifically, the minimum size of the first noise reduction cavity is not smaller than the minimum size of the second noise reduction cavity, and the ratio of the minimum size of the first noise reduction cavity to the minimum size of the second noise reduction cavity ranges from 0.5 to 2.
The second noise reduction cavity is internally provided with a partition part, and the second noise reduction cavity is divided into at least two noise reduction cavities by the partition part.
Specifically, a second sound-absorbing member is arranged in at least one noise-reducing cavity.
Wherein the cross section of the perforation is circular or polygonal.
Specifically, the diameter range of the through hole is 2mm-6mm, and when the cross section of the through hole is polygonal, the diameter range of the circumcircle of the polygonal through hole is 2mm-6 mm.
Compared with the prior art, the noise reduction device provided by the invention has the following advantages:
the invention provides a noise reduction device, which comprises an air box, a first noise reduction component, a second noise reduction component and a first sound absorption component, wherein the air box is provided with a first air inlet and a second air inlet; the first noise reduction component and the second noise reduction component are uniformly distributed with through holes, the first noise reduction component divides the inside of the air box into an accommodating cavity and a sound absorbing cavity, and the second noise reduction component is arranged in the sound absorbing cavity; one side of the second noise reduction component facing the first noise reduction component and the inner wall surfaces of the first noise reduction component and the air box are enclosed to form a first noise reduction cavity, and the first noise absorption component is arranged in the first noise reduction cavity; one side of the second noise reduction component departing from the first noise reduction component and the inner wall surface of the air box are enclosed to form a second noise reduction cavity.
From this analysis can know, fall the component through first making an uproar and separate into in with the bellows and hold chamber and sound absorbing chamber, hold the fan and the purifier that the chamber can hold the desktop cigarette machine, and fall the component and first sound absorbing component through the second that sets up in the sound absorbing chamber, can absorb the noise that fan and purifier produced to a certain extent.
In this application, the first noise reduction component and the second noise reduction component are uniformly distributed with perforations, so that noise generated by the fan can reach the first noise absorption component in the first noise reduction cavity through the perforations on the first noise reduction component, and the first noise absorption component are used for realizing the first-level noise absorption and reduction.
After the noise passes through the first sound-absorbing component, the noise reaches the second noise-reducing component and enters the second noise-reducing cavity through the through hole in the second noise-reducing component, so that secondary sound absorption and noise reduction can be realized.
Therefore, through the first noise reduction component, the second noise reduction component, the first sound absorption component, the first noise reduction component and the second noise reduction component which are arranged in the air box, the perforation formed on the first noise reduction component and the second noise reduction component, and the first noise reduction cavity and the second noise reduction cavity which are separated by the first noise reduction component and the second noise reduction component, the noise generated by the fan can be absorbed to a certain degree, and the experience of a user is improved.
In addition, the invention also provides a table top cigarette machine, which comprises a fan, a purifying device and the noise reduction device; the fan with purifier all set up in hold the intracavity, just be formed with air inlet and gas outlet on the bellows, the air intake of fan with the air inlet is corresponding.
In the desktop cigarette machine that this application provided, fan and purifier isotructure all set up and are holding the intracavity, and are formed with air inlet and gas outlet on the bellows, and air intake through making the fan is corresponding with the air inlet, can make the flue gas inhale fast and hold the chamber to filter oil smoke and peculiar smell through purifier, discharge by the gas outlet again.
Because the desktop cigarette machine in this application has adopted the device of making an uproar of falling, consequently, can absorb to a certain extent and hold the produced noise of intracavity fan and purifier to the noise that produces when reducing whole desktop cigarette machine and using, and then the experience that promotes the diner to a certain extent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic overall structure diagram of a noise reduction device in a first embodiment according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first viewing angle of a noise reduction apparatus in a first implementation manner according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
fig. 4 is a schematic partial structural diagram of a noise reduction device in a second implementation example provided in the present invention;
fig. 5 is a schematic partial structural diagram of a noise reduction device in a third embodiment according to an example of the present invention.
In the figure: 1-an air box; 101-a containment chamber; 102-an air inlet; 103-gas outlet; 2-a first noise reducing member; 3-a second noise reducing member; 4-a first noise reduction cavity; 5-a second noise reduction cavity; 501-a partition; 502-a noise reducing cavity; 6-a first sound absorbing member; 7-perforating;
s1 — first direction.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As used herein, the term "and/or" includes any one of the associated listed items and any combination of any two or more of the items.
For ease of description, spatial relationship terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The singular forms also are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, quantities, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and/or combinations thereof.
Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may be expected. Thus, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shape that occur during manufacturing.
The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. Further, while the examples described herein have a variety of configurations, other configurations are possible, as will be apparent after understanding the disclosure of the present application. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
Example 1
As shown in fig. 1, the present invention provides a noise reducing device comprising a wind box 1, a first noise reducing member 2, a second noise reducing member 3, and a first sound absorbing member 6; the first noise reduction component 2 and the second noise reduction component 3 are respectively provided with through holes 7, the first noise reduction component 2 divides the inside of the air box 1 into an accommodating cavity 101 and a sound absorbing cavity, and the second noise reduction component 3 is arranged in the sound absorbing cavity; a first noise reduction cavity 4 is formed by enclosing one side of the second noise reduction member 3 facing the first noise reduction member 2 and the inner wall surfaces of the first noise reduction member 2 and the air box 1, and a first sound absorption member 6 is arranged in the first noise reduction cavity 4; one side of the second noise reduction member 3 departing from the first noise reduction member 2 and the inner wall surface of the air box 1 are enclosed to form a second noise reduction cavity 5.
Compared with the prior art, the noise reduction device provided by the invention has the following advantages:
according to the noise reduction device provided by the invention, the first noise reduction component 2 is used for dividing the interior of the air box 1 into the containing cavity 101 and the sound absorption cavity, the containing cavity 101 can contain a fan and a purification device of a table-top cigarette machine, and the second noise reduction component 3 and the first sound absorption component 6 which are arranged in the sound absorption cavity can absorb noise generated by the fan and the purification device to a certain extent.
In this embodiment, the first and second noise reduction members 2, 3 are arcuate and parallel to each other, as shown in fig. 1-3.
Make the first component 2 of making an uproar of falling be the arc structure, can match the fan that holds the intracavity setting in 101 better on the one hand, and the outer wall of fan sets up with the arc face parallel of the first component 2 of making an uproar of falling in this application, and on the other hand also can play the effect of direction to the fan combustion gas, avoids holding the intracavity 101 in vortex scheduling problem appears.
Make the second fall the component 3 of making an uproar and be the arc, and fall the parallel arrangement of component 2 with the first, can form the even excessive first chamber 4 and the second chamber 5 of making an uproar of falling of size along first direction S1 to can improve sound absorption effect and inhale the sound frequency bandwidth to a certain extent.
The first sound absorbing member 6 in this application is adapted to the shape and size of the first noise reducing chamber 4, and therefore, in this embodiment, the first sound absorbing member 6 is also of an arc-shaped configuration and filled in the first noise reducing chamber 4.
As shown in fig. 1-3, the first and second noise reduction members 2, 3 are each distributed with perforations 7, and the perforation 7 rate on the first and second noise reduction members 2, 3 is between 50% -90% in this application.
It should be added here that the perforation 7 rates of the first noise reduction member 2 and the second noise reduction member 3 in the present application may be the same or different, and preferably, the aperture rates of the first noise reduction member 2 and the second noise reduction member 3 are both 80%.
When the noise-reducing fan is used, noise generated by the fan is in contact with the first sound-absorbing component 6 through the through holes 7 of the first noise-reducing component 2, and sound waves and the first sound-absorbing component 6 generate friction, so that sound energy is converted into heat energy to be dissipated, and primary noise reduction of the noise is realized.
After the sound wave has undergone the primary noise reduction, it enters the second noise reduction chamber 5 through the perforations 7 of the second noise reduction member 3. The second noise reduction cavity 5 may be a cavity in this application. At this time, each perforation 7 of the second noise reduction member 3 is equivalent to a resonator, and when the sound wave enters the perforation 7 of the second noise reduction member 3, if the frequency of the incident sound wave is equal to or close to the natural frequency, the air column in the perforation 7 vibrates strongly, and the sound energy is further consumed to overcome the frictional resistance, thereby realizing the secondary noise reduction of the noise.
Through the first noise reduction component 2, the second noise reduction component 3, the first noise reduction component 6, the perforation 7 formed on the first noise reduction component 2 and the second noise reduction component 3, and the first noise reduction cavity 4 and the second noise reduction cavity 5 separated by the first noise reduction component 2 and the second noise reduction component 3 which are arranged in the bellows 1, the noise generated by the fan can be absorbed to a certain extent, and the experience of a user is improved.
It should be added that, since the noise reduction effect of the noise reduction system formed by the second noise reduction members 3 and the second noise reduction cavities 5 in the present application is related to the width of the second noise reduction cavities 5 in the first direction S1, the size of the second noise reduction cavities 5 in the first direction S1 is preferably changed uniformly, so that the overall sound absorption frequency bandwidth can be improved.
In the application, the first noise reduction member 2 and the second noise reduction member 3 can be integrally formed with the air box 1, and can also be connected with the air box 1 through welding or bonding and other modes.
As shown in fig. 1-3, the minimum size of the first noise reduction cavity 4 is not smaller than the minimum size of the second noise reduction cavity 5, and the ratio of the minimum size of the first noise reduction cavity 4 to the minimum size of the second noise reduction cavity 5 is in the range of 0.5-2.
The minimum dimension in the first chamber 4 of making an uproar falls for the first distance L1 between the member 2 and the second falls the member 3 of making an uproar in this application, the minimum dimension in the second chamber 5 of making an uproar falls for the second and falls the distance L2 between the diapire of member 3 and bellows 1, because the sound effect of inhaling that first sound absorbing member 6's thickness had is better more, consequently, make L1 be equal to or greater than L2 in this application, can cross the thickness of guaranteeing first sound absorbing member 6 to a certain extent, thereby can guarantee better sound effect of inhaling.
In some embodiments of the present application, a second sound absorption member (not shown in the drawings) may be disposed in the second noise reduction cavity 5, so that the ratio between L1 and L2 is 0.5-2, and the sizes of the first noise reduction cavity 4 and the second noise reduction cavity 5 can be evenly distributed, thereby further improving the sound absorption and noise reduction effects of the whole device.
Preferably, the first sound absorbing member 6 and the second sound absorbing member are both sound absorbing cotton in the present application.
Example 2
As shown in fig. 4, in the present embodiment, the second noise reduction member 3 is arranged along a tangential direction in the first noise reduction member 2, and the second noise reduction member 3 is tangent to the first noise reduction member 2 to form two first noise reduction chambers 4 respectively located at both sides of the first noise reduction member 2.
In the present embodiment, the first noise reduction member 2 has an arc-shaped structure, and the second noise reduction member 3 is tangent to the first noise reduction member 2, that is, the first noise reduction member 2 and the second noise reduction member 3 in the present embodiment are fixedly connected, and the connection position is located at the central position of the first noise reduction member 2 and the second noise reduction member 3.
Therefore, in the present application, the through holes 7 of the first noise reduction member 2 and the second noise reduction member 3 are arranged away from the joint, i.e. the through holes 7 of the first noise reduction member 2 and the second noise reduction member 3 are arranged on two sides of the joint. Since two first noise reduction cavities 4 oppositely disposed on both sides of the first noise reduction member 2 are formed, the coverage area of the through-holes 7 in the present embodiment substantially corresponds to the first noise reduction cavities 4.
Here, it should be noted that in the present embodiment, the first sound absorbing members 6 are provided in both of the first noise reduction chambers 4.
Example 3
As shown in fig. 5, in any of the above embodiments, a partition 501 is provided in the second noise reduction chamber 5, and the partition 501 divides the second noise reduction chamber 5 into at least two noise reduction cavities 502.
Preferably, as shown in fig. 5, the number of the partitions 501 in the present application is three, and the second noise reduction cavity 5 is vertically partitioned into four noise reduction cavities 502.
Further preferably, the at least one noise reduction cavity 502 is provided with a second sound absorption member, and the four noise reduction cavities 502 separated in the application are provided with second sound absorption members, so that the sound absorption and noise reduction effects of the whole device can be further improved.
In the above three embodiments, the cross-section of the perforations 7 is circular or polygonal, and when the cross-section of the perforations 7 is circular, the diameter of the perforations 7 ranges between 2mm and 6 mm.
When the cross section of the through hole 7 is polygonal, the diameter of the circumcircle of the polygonal through hole 7 ranges from 2mm to 6 mm.
The pattern of the perforations 7 of the first noise reduction member 2 and the pattern of the perforations 7 of the second noise reduction member 3 in this application may be the same, and may also be different. Preferably, the perforations 7 in the first noise reduction member 2 and the second noise reduction member 3 are both round holes and each have a diameter of 2 mm.
In addition, the invention also provides a table top cigarette machine, which comprises a fan, a purifying device and the noise reduction device; the fan and the purification device are both arranged in the accommodating cavity 101, an air inlet 102 and an air outlet 103 are formed on the air box 1, and an air inlet of the fan corresponds to the air inlet 102.
In the desktop cigarette machine that this application provided, fan and purifier isotructure all set up in holding chamber 101, and are formed with air inlet 102 and gas outlet 103 on bellows 1, and air intake and air inlet 102 through making the fan are corresponding, can make the flue gas inhale fast and hold chamber 101 to filter oil smoke and peculiar smell through purifier, discharge by gas outlet 103 again.
Because the desktop cigarette machine in this application has adopted the device of making an uproar of falling, consequently, can absorb to a certain extent and hold the produced noise of chamber 101 internal fan and purifier to the noise that produces when reducing whole desktop cigarette machine and using, and then the experience of lifting the diner to a certain extent.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A noise reducing device is characterized by comprising an air box, a first noise reducing component, a second noise reducing component and a first sound absorbing component;
perforations are distributed on the first noise reduction component and the second noise reduction component, the first noise reduction component divides the inside of the air box into an accommodating cavity and a sound absorbing cavity, and the second noise reduction component is arranged in the sound absorbing cavity;
a first noise reduction cavity is formed by enclosing one side of the second noise reduction component facing the first noise reduction component and the inner wall surfaces of the first noise reduction component and the air box, and the first noise absorption component is arranged in the first noise reduction cavity;
and a second noise reduction cavity is formed by enclosing one side of the second noise reduction component, which deviates from the first noise reduction component, and the inner wall surface of the air box.
2. The noise reducer of claim 1, wherein the first noise reduction member has an arcuate configuration and the perforations in the first noise reduction member have a perforation rate of 50-90%.
3. The noise reducer of claim 2, wherein the second noise reduction member is disposed tangentially within the first noise reduction member and the second noise reduction member is tangent to the first noise reduction member to form two first noise reduction cavities on either side of the first noise reduction member.
4. The noise reducer of claim 1, wherein the second noise reduction member has an arcuate configuration and the perforations in the second noise reduction member have a perforation rate of 50-90%;
the first sound absorbing member is adapted to the shape and size of the first noise reduction chamber.
5. The noise reduction device of claim 4, wherein the smallest dimension of the first noise reduction cavity is no less than the smallest dimension of the second noise reduction cavity, and wherein the ratio of the smallest dimension of the first noise reduction cavity to the smallest dimension of the second noise reduction cavity is in the range of 0.5-2.
6. The noise reducer according to claim 1, wherein a partition is provided in the second noise reducing cavity and divides the second noise reducing cavity into at least two noise reducing cavities.
7. The noise reducer of claim 6, wherein a second sound absorbing member is disposed within at least one of the noise reducing cavities.
8. The noise reduction device of claim 1, wherein the perforations are circular or polygonal in cross-section.
9. The noise reducer according to claim 8, wherein the perforations have a diameter in the range of 2mm to 6mm, and wherein when the perforations are polygonal in cross-section, the perforations have a circumscribed circle diameter in the range of 2mm to 6 mm.
10. A table top machine comprising a fan, a cleaning device and a noise reducing device as claimed in any one of claims 1 to 9;
the fan with purifier all set up in hold the intracavity, just be formed with air inlet and gas outlet on the bellows, the air intake of fan with the air inlet is corresponding.
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| CN202111346959.7A CN114023292A (en) | 2021-11-15 | 2021-11-15 | Noise reduction device and tabletop smoke machine |
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| CN202111346959.7A CN114023292A (en) | 2021-11-15 | 2021-11-15 | Noise reduction device and tabletop smoke machine |
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| JP2001099099A (en) * | 1999-10-04 | 2001-04-10 | Maruyama Mfg Co Ltd | Axial blower and air blast sprayer |
| US20110203128A1 (en) * | 2008-10-23 | 2011-08-25 | Oscar Jose Rodrigues | Electrical Hair Dryer With Noise Reducer And Noise Reducer |
| US20100329850A1 (en) * | 2009-06-24 | 2010-12-30 | Bsh Bosch Und Siemens Hausgerate Gmbh | External extractor fan for exhaust hood |
| CN107869751A (en) * | 2017-12-05 | 2018-04-03 | 四川巨海渔业科技有限公司 | A kind of noise absorber of exhauster for removing kitchen fumes |
| CN207922328U (en) * | 2018-01-22 | 2018-09-28 | 美的集团股份有限公司 | Spiral case and kitchen ventilator |
| US20200049373A1 (en) * | 2018-08-13 | 2020-02-13 | Po-Wei Huang | Silencer structure |
| CN210718003U (en) * | 2019-09-29 | 2020-06-09 | 海润新风（重庆）智能技术有限公司 | Silence ventilation case with water conservancy diversion is fallen and is made an uproar |
| CN213400538U (en) * | 2020-08-24 | 2021-06-08 | 杭州老板电器股份有限公司 | Noise reduction structure and range hood |
| CN216353333U (en) * | 2021-11-15 | 2022-04-19 | 杭州老板电器股份有限公司 | Noise reduction device and tabletop smoke machine |
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