CN109404343B - Silencing device, silencing system and cleaning equipment - Google Patents
Silencing device, silencing system and cleaning equipment Download PDFInfo
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- CN109404343B CN109404343B CN201811191914.5A CN201811191914A CN109404343B CN 109404343 B CN109404343 B CN 109404343B CN 201811191914 A CN201811191914 A CN 201811191914A CN 109404343 B CN109404343 B CN 109404343B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
- F04D29/664—Sound attenuation by means of sound absorbing material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
- F04D29/665—Sound attenuation by means of resonance chambers or interference
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Duct Arrangements (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention provides a silencing device, a silencing system and cleaning equipment, wherein the silencing device comprises: the air inlet structure comprises a silencing cavity, at least two air inlets, an air duct and at least two through holes arranged on the air duct, wherein each air inlet is arranged on a first end face of the silencing cavity; the at least two air inlets correspond to the at least two through holes one by one, and the corresponding air inlets are matched with the through holes; the side wall of each air inlet is integrally formed with the side wall of the matched perforation; the air duct is used for guiding sound waves generated by an external fan so that the sound waves enter the silencing cavity through the through holes and the air inlet; in the silencing cavity, the sound wave interacts with the air in the silencing cavity to reciprocate, so that the sound energy of the sound wave is converted into heat energy. The scheme provided by the invention can effectively eliminate the low-medium frequency noise.
Description
Technical Field
The invention relates to the technical field of silencing equipment, in particular to a silencing device, a silencing system and cleaning equipment.
Background
With the popularization of cleaning equipment such as dust collectors and floor sweeping robots, the noise generated when the cleaning equipment works often affects the life and work of people. Moreover, the noise generated when the cleaning device works is one of the problems affecting the development of the cleaning device. Therefore, eliminating the operating noise of the cleaning apparatus has become one of the problems to be solved.
Silencers are devices that allow airflow to pass through, but block or attenuate the propagation of sound waves, and are one of the main measures to reduce. The existing silencer mainly aims at high-frequency noise, but has poor eliminating effect on medium-low frequency noise generated by cleaning equipment.
Disclosure of Invention
The embodiment of the invention provides a silencing device, a silencing system and cleaning equipment, which can effectively eliminate medium and low frequency noise.
An embodiment of the present invention provides a noise reduction apparatus, including: a silencing cavity, at least two air inlets, an air duct and at least two perforations arranged on the air duct,
each air inlet is arranged on the first end face of the silencing cavity;
the at least two air inlets correspond to the at least two through holes one by one, and the corresponding air inlets are matched with the through holes;
the inner side wall of each air inlet is integrally formed with the inner side wall of the matched through hole;
the air duct is used for guiding sound waves generated by an external fan so that the sound waves enter the silencing cavity through the through holes and the air inlet;
in the silencing cavity, the sound wave interacts with air in the silencing cavity to reciprocate, so that sound energy of the sound wave is converted into heat energy.
Preferably, the first and second electrodes are formed of a metal,
the above-mentioned silencing device further includes: further comprising: a first cylindrical neck portion matching each of said air inlets and said perforations corresponding to said air inlets, wherein,
the inner side wall of one end of the first cylindrical neck part and the inner side wall of the matched air inlet are integrally formed;
the inner side wall of the other end of the first cylindrical neck part and the inner side wall of the matched through hole are integrally formed;
the first cylindrical neck communicates the air inlet and the perforations.
Preferably, the first and second electrodes are formed of a metal,
the above-mentioned silencing device further includes: a second cylindrical neck portion matching each of said air inlets and said perforations corresponding to said air inlets, wherein,
the outer diameter of the second cylindrical neck is the same as the diameter of the matched air inlet;
one end of the second cylindrical neck penetrates through the air inlet and is positioned in the sound attenuation cavity;
part of the outer side wall of the second cylindrical neck part is overlapped with the inner side wall of the air inlet and is integrally formed;
the other end of the second cylindrical neck is integrally formed with the through hole corresponding to the air inlet.
Preferably, the first and second electrodes are formed of a metal,
an air column is wrapped between the air inlet and the matched through hole;
when the sound waves reach the through holes, the sound waves push the air columns to reciprocate, and the air columns rub against the inner side walls of the air inlets and the inner side walls of the matched through holes, so that sound energy of the sound waves is converted into heat energy.
Preferably, the first and second electrodes are formed of a metal,
the above-mentioned silencing device further includes: at least one air outlet, wherein,
the at least one air outlet is arranged on the second end face of the silencing cavity;
the second end face is parallel to the second end face;
the diameter of each air outlet is smaller than that of the air inlet.
Preferably, the first and second electrodes are formed of a metal,
the sizes of the air inlets are the same, and the sizes of the through holes are the same;
the relationship among the volume of the silencing cavity, the distance between the matched air inlet and the through holes, the area of the first end face and the number of the through holes meets the following relationship formula group;
a set of relational equations:
wherein V represents the volume of the sound-deadening cavity; n represents the number of the perforations; r represents the diameter of the perforation, c represents the speed of sound; f represents the noise frequency; l represents the distance between the matching air inlet and the perforation; s represents the area of the first end face; n represents the number of the perforations.
Preferably, the first and second electrodes are formed of a metal,
the silencing device is applied to cleaning equipment.
Preferably, the first and second electrodes are formed of a metal,
the frequency range of the noise eliminating device can eliminate the noise is 360-365 Hz and 2160-2190 Hz.
Preferably, the first and second electrodes are formed of a metal,
in the above silencing apparatus, each of the air inlets is uniformly distributed on the first end surface.
A sound abatement system comprising: at least two silencing devices and fans as described in any of the above, wherein,
the at least two silencing devices are respectively arranged at the air inlet of the fan and the air outlet of the fan;
the air channels of two adjacent silencing devices are communicated with each other;
the silencing devices are respectively arranged at the air inlet of the fan and are used for eliminating noise in the direction of the air inlet of the fan;
and the silencing devices are respectively arranged at the air outlet of the fan and used for eliminating the noise in the direction of the air outlet of the fan.
A cleaning device, comprising: a cleaning device body, a fan arranged in the cleaning device body and at least two silencing devices, wherein,
the at least two silencing devices are respectively arranged at the air inlet of the fan and the air outlet of the fan;
the air channels of two adjacent silencing devices are communicated with each other;
the silencing devices are respectively arranged at the air inlet of the fan and are used for eliminating noise in the direction of the air inlet of the fan;
and the silencing devices are respectively arranged at the air outlet of the fan and used for eliminating the noise in the direction of the air outlet of the fan.
A cleaning device, comprising: the cleaning device comprises a cleaning device body and the silencing system arranged in the cleaning device body.
The embodiment of the invention provides a silencing device, a silencing system and cleaning equipment, wherein the silencing device comprises: the air inlet structure comprises a silencing cavity, at least two air inlets, an air duct and at least two through holes arranged on the air duct, wherein each air inlet is arranged on a first end face of the silencing cavity; the at least two air inlets correspond to the at least two through holes one by one, and the corresponding air inlets are matched with the through holes; the side wall of each air inlet is integrally formed with the side wall of the matched perforation; the air duct is used for guiding sound waves generated by an external fan so that the sound waves enter the silencing cavity through the through holes and the air inlet; tests show that the frequency of the silencing device provided by the invention is in the middle and low frequency, so that after external sound waves of the middle and low frequency enter the silencing cavity, resonance can be generated, the reciprocating motion speed of the air in the silencing cavity can be maximized by the resonance, and correspondingly, more sound energy is converted into heat energy, thereby effectively eliminating middle and low frequency noise.
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 introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a muffler assembly according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a muffler assembly according to another embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a muffler assembly according to another embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a muffler assembly according to another embodiment of the present invention;
FIG. 5 is a schematic diagram of a muffler system according to an embodiment of the present invention;
FIG. 6 is a schematic view of a cleaning apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a cleaning device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention, and based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a silencer device, which may include: a sound-deadening chamber 101, at least two air inlets 102, an air duct 103, and at least two perforations 104 provided thereon, wherein,
each of the air inlets 102 is disposed on a first end surface of the muffling cavity;
the at least two air inlets 102 correspond to the at least two perforations 104 one by one, and the corresponding air inlets 102 are matched with the perforations 104;
the inner side wall of each air inlet 102 is integrally formed with the inner side wall of the corresponding perforation 104;
the air duct 103 is used for guiding sound waves generated by an external fan so that the sound waves enter the silencing cavity 101 through the perforations and the air inlet;
in the sound attenuation cavity 101, the sound waves interact with the air in the sound attenuation cavity 101 to reciprocate, so that the sound energy of the sound waves is converted into heat energy.
It will be appreciated that the air inlet and the perforations communicate the sound-deadening chamber with the air duct.
In the embodiment shown in fig. 1, the silencing apparatus comprises: the air inlet structure comprises a silencing cavity, at least two air inlets, an air duct and at least two through holes arranged on the air duct, wherein each air inlet is arranged on a first end face of the silencing cavity; the at least two air inlets correspond to the at least two through holes one by one, and the corresponding air inlets are matched with the through holes; the side wall of each air inlet is integrally formed with the side wall of the matched perforation; the air duct is used for guiding sound waves generated by an external fan so that the sound waves enter the silencing cavity through the through holes and the air inlet; tests show that the frequency of the silencing device provided by the invention is in the middle and low frequency, so that after external sound waves of the middle and low frequency enter the silencing cavity, resonance can be generated, the reciprocating motion speed of the air in the silencing cavity can be maximized by the resonance, and correspondingly, more sound energy is converted into heat energy, thereby effectively eliminating middle and low frequency noise.
In addition, the air column wrapped between the air inlet and the matched perforation is equivalent to a piston and has a certain mass, when the sound waves reach the perforation, the sound waves push the air column to reciprocate, and the air column rubs with the inner side wall of the air inlet and the inner side wall of the matched perforation, so that the sound energy of the sound waves is converted into heat energy. Further improves the consumption of sound waves, and further improves the performance of the silencer for eliminating middle and low frequency noise.
In another embodiment of the invention, the elimination of mid and low frequency noise is enhanced by increasing the height of the column of air trapped between the air inlet and the matching perforation. As shown in fig. 2, the above-mentioned silencer further includes: a first cylindrical neck 105 matching each of said air inlets 102 and said perforations 104 corresponding to said air inlets 102, wherein,
the inner side wall of one end of the first cylindrical neck 105 is integrally formed with the inner side wall of the matching air inlet 102;
the inner side wall of the other end of the first cylindrical neck 105 is integrally formed with the inner side wall of the matching through hole 104;
the first cylindrical neck 105 communicates between the inlet 102 and the perforations 104.
In another embodiment of the present invention, as shown in fig. 3, the above-mentioned silencing apparatus further includes: a second cylindrical neck 106 matching each of said air inlets and said perforations corresponding to said air inlets, wherein,
the outer diameter of the second cylindrical neck 106 is the same as the diameter of the matching inlet 102;
one end of the second cylindrical neck 106 passes through the air inlet 102 and is located in the sound attenuation cavity;
part of the outer side wall of the second cylindrical neck 106 coincides with the inner side wall of the air inlet 102 and is integrally formed;
the other end of the second cylindrical neck 106 is integrally formed with the through hole 104 corresponding to the air inlet 102.
It should be noted that, in the above-mentioned muffling devices shown in fig. 1, fig. 2 and fig. 3, there is a difference in the way of integrally forming the air inlet and the corresponding through hole, where fig. 1 shows that the inner sidewall of the air inlet and the inner sidewall of the corresponding through hole are directly integrally formed, and the height of the air column is the thickness of the air inlet plus the thickness of the through hole; FIG. 2 shows the air inlet in communication with the corresponding bore through the first cylindrical neck, the height of the column of air being the sum of the thickness of the air inlet, the thickness of the bore, and the height of the first cylindrical neck; fig. 3 shows that the air inlet is communicated with the corresponding through hole through the second cylindrical neck, because the outer diameter of the second cylindrical neck is the same as the diameter of the air inlet, one end of the second cylindrical neck is embedded into the air inlet and enters the sound attenuation cavity, the other end of the second cylindrical neck is embedded into the corresponding through hole and is positioned on the same curved surface with the inner side wall of the air duct, and the height of the air column is the height of the second cylindrical neck; the above difference causes the height of the air column formed between the air inlet and the corresponding through hole to be different, and the different height of the air column can resonate with different sound wave frequencies, so that a user can select the silencer with different structures according to actual needs. For example, the three muffling devices can be simultaneously selected to eliminate noises with different frequencies, so that the muffling effect is enhanced.
In another embodiment of the present invention, as shown in fig. 4, the above-mentioned silencer further includes: at least one air outlet 107, wherein,
the at least one air outlet is arranged on the second end face of the silencing cavity;
the second end face is parallel to the second end face;
the diameter of each air outlet is smaller than that of the air inlet.
The air outlet is used for reducing the pressure in the silencing cavity and avoiding the damage caused by overlarge pressure in the silencing cavity.
In another embodiment of the invention, in order to enable the silencer to better eliminate the low and medium frequency noise and simultaneously realize the design of the silencer according to the frequency of the low and medium frequency noise. The sizes of the air inlets are the same, and the sizes of the through holes are the same; the relationship among the volume of the silencing cavity, the distance between the matched air inlet and the through holes, the area of the first end face and the number of the through holes meets the following relationship formula group;
a set of relational equations:
wherein V represents the volume of the sound-deadening cavity; n represents the number of the perforations; r represents the diameter of the perforation, c represents the speed of sound; f represents the noise frequency; l represents the distance between the matching air inlet and the perforation; s represents the area of the first end face; n represents the number of the perforations.
And L represents the distance between the matched air inlet and the through hole, and the distance is actually the vertical distance from the inner side wall of the air duct to the inner wall of the first end face regardless of whether a cylindrical neck part exists between the air inlet and the through hole.
The volume of a silencing cavity of the silencing device, the distance between the matched air inlet and the through hole, the area of the first end face and the number of the through holes are modulated according to the relational formula set, so that the silencing device has diversity, and the volume of the silencing cavity, the distance between the matched air inlet and the through hole, the area of the first end face and the number of the through holes can be selected according to actual needs.
In another embodiment of the present invention, the above-mentioned noise reduction device is applied to a cleaning apparatus.
In another embodiment of the present invention, the frequency range of the noise eliminated by the silencer is 360 to 365Hz and 2160 to 2190 Hz.
In another embodiment of the present invention, each of the air inlets is uniformly distributed on the first end surface.
In addition, the silencing device can be made of plastic materials. The inner wall of the silencing cavity in the silencing device can be covered with silencing cotton to improve the silencing effect.
As shown in FIG. 5, one embodiment of the present invention provides a sound attenuating system, comprising: at least two muffling devices 501 and fans 502 as described in any of the above, wherein,
the at least two muffling devices 501 are respectively arranged at the air inlet of the fan 502 and the air outlet of the fan;
the air ducts of two adjacent silencing devices 501 are communicated with each other;
each of the muffling devices 501 is disposed at the air inlet of the fan 502, and is configured to eliminate noise in the direction of the air inlet of the fan 502;
and the silencing devices 501 are respectively arranged at the air outlet of the fan 502 and are used for eliminating noise in the direction of the air outlet of the fan 502.
Understandably, the air outlet of the fan 502 is communicated with an air duct of the silencer 501; the air inlet of the fan 502 is communicated with the air duct of the other silencer 501.
As shown in fig. 6, one embodiment of the present invention provides a cleaning apparatus including: a cleaning device body 600, a fan 602 arranged in the cleaning device body 600, and at least two muffling devices 601 according to any one of the above,
the at least two silencing devices 601 are respectively arranged at the air inlet of the fan 602 and the air outlet of the fan;
the air ducts of two adjacent silencing devices 601 are communicated with each other;
each silencer 601 is arranged at the air inlet of the fan 602, and is used for eliminating noise in the direction of the air inlet of the fan 602;
the silencing devices 601 respectively arranged at the air outlet of the fan 602 are used for eliminating noise in the direction of the air outlet of the fan.
Understandably, the air outlet of the fan 602 is communicated with an air duct of the silencer 601; the air inlet of the fan 601 is communicated with the air duct of the other silencer 601.
In addition, when the cleaning device comprises air ducts of different levels, the silencing device 601 can be directly communicated with the air ducts of different levels, or replace the air ducts of different levels, so that the medium-low noise of the cleaning device can be eliminated.
As shown in fig. 7, one embodiment of the present invention provides a cleaning apparatus including: a cleaning apparatus body 700, and the above-mentioned muffler system 701 provided in the cleaning apparatus body 700.
The above embodiments have at least the following advantages:
1. in an embodiment of the present invention, a muffler device includes: the air inlet structure comprises a silencing cavity, at least two air inlets, an air duct and at least two through holes arranged on the air duct, wherein each air inlet is arranged on a first end face of the silencing cavity; the at least two air inlets correspond to the at least two through holes one by one, and the corresponding air inlets are matched with the through holes; the side wall of each air inlet is integrally formed with the side wall of the matched perforation; the air duct is used for guiding sound waves generated by an external fan so that the sound waves enter the silencing cavity through the through holes and the air inlet; tests show that the frequency of the silencing device provided by the invention is in the middle and low frequency, so that after external sound waves of the middle and low frequency enter the silencing cavity, resonance can be generated, the reciprocating motion speed of the air in the silencing cavity can be maximized by the resonance, and correspondingly, more sound energy is converted into heat energy, thereby effectively eliminating middle and low frequency noise.
2. In the embodiment of the invention, the air column wrapped between the air inlet and the matched perforation is equivalent to a piston and has certain mass, when the sound wave reaches the perforation, the sound wave pushes the air column to reciprocate, and the air column rubs with the inner side wall of the air inlet and the inner side wall of the matched perforation, so that the sound energy of the sound wave is converted into heat energy. Further improves the consumption of sound waves, and further improves the performance of the silencer for eliminating middle and low frequency noise.
3. In the embodiment of the invention, three communication modes between the air inlets and the corresponding through holes are provided, so that the silencer has diversity and meets different requirements of users.
4. In the embodiment of the invention, the silencing cavity is provided with at least one air outlet, the diameter of the air outlet is smaller than that of the air inlet, and the air outlet can reduce the pressure in the silencing cavity and avoid the damage caused by overlarge pressure in the silencing cavity.
5. In the embodiment of the invention, the relationship among the volume of the silencing cavity, the distance between the matched air inlet and the through holes, the area of the first end surface and the number of the through holes is given for the noise frequency, so that the design size of the silencing device has diversity for eliminating the noise with the same frequency, and the requirements of different equipment structures are met.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a" does not exclude the presence of other similar elements in a process, method, article, or apparatus that comprises the element.
Finally, it is to be noted that: the above description is only a preferred embodiment of the present invention, and is only used to illustrate the technical solutions of the present invention, and not to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (5)
1. A sound-deadening device, comprising: a silencing cavity, at least two air inlets, an air duct and at least two perforations arranged on the air duct,
each air inlet is arranged on the first end face of the silencing cavity;
the at least two air inlets correspond to the at least two through holes one by one, and the corresponding air inlets are matched with the through holes;
the inner side wall of each air inlet is integrally formed with the inner side wall of the matched through hole;
the air duct is used for guiding sound waves generated by an external fan so that the sound waves enter the silencing cavity through the through holes and the air inlet;
in the silencing cavity, the sound wave interacts with air in the silencing cavity to reciprocate, so that the sound energy of the sound wave is converted into heat energy;
an air column is wrapped between the air inlet and the matched through hole;
when the sound waves reach the perforation, the sound waves push the air column to reciprocate, and the air column rubs with the inner side wall of the air inlet and the inner side wall of the perforation matched with the air inlet, so that the sound energy of the sound waves is converted into heat energy;
a second cylindrical neck portion matching each of said air inlets and said perforations corresponding to said air inlets, wherein,
the outer diameter of the second cylindrical neck is the same as the diameter of the matched air inlet;
one end of the second cylindrical neck penetrates through the air inlet and is positioned in the sound attenuation cavity;
part of the outer side wall of the second cylindrical neck part is overlapped with the inner side wall of the air inlet and is integrally formed;
the other end of the second cylindrical neck is integrally formed with the through hole corresponding to the air inlet;
the silencing cavity is a closed cavity;
the sizes of the air inlets are the same, and the sizes of the through holes are the same;
the relationship among the volume of the silencing cavity, the distance between the matched air inlet and the through holes, the area of the first end face and the number of the through holes meets the following relationship formula group;
a set of relational equations:
wherein V represents the volume of the sound-deadening cavity; n represents the number of the perforations; r represents the diameter of the perforation, c represents the speed of sound; f represents the noise frequency; l represents the distance between the matching air inlet and the perforation; s represents the area of the first end face.
2. The muffling device of claim 1,
application to cleaning equipment;
and/or the presence of a gas in the gas,
the frequency range of the noise capable of being eliminated is 360-365 Hz and 2160-2190 Hz;
and/or the presence of a gas in the gas,
each air inlet is uniformly distributed on the first end face.
3. A sound attenuation system, comprising: at least two of the acoustic abatement device and blower of any one of claims 1 and 2,
the at least two silencing devices are respectively arranged at the air inlet of the fan and the air outlet of the fan;
the air channels of two adjacent silencing devices are communicated with each other;
the silencing devices are respectively arranged at the air inlet of the fan and are used for eliminating noise in the direction of the air inlet of the fan;
and the silencing devices are respectively arranged at the air outlet of the fan and used for eliminating the noise in the direction of the air outlet of the fan.
4. A cleaning apparatus, comprising: a cleaning device body, a fan arranged in the cleaning device body and at least two silencing devices according to any one of claims 1 and 2, wherein,
the at least two silencing devices are respectively arranged at the air inlet of the fan and the air outlet of the fan;
the air channels of two adjacent silencing devices are communicated with each other;
the silencing devices are respectively arranged at the air inlet of the fan and are used for eliminating noise in the direction of the air inlet of the fan;
and the silencing devices are respectively arranged at the air outlet of the fan and used for eliminating the noise in the direction of the air outlet of the fan.
5. A cleaning apparatus, comprising: a cleaning device body and the acoustic abatement system of claim 3 disposed within the cleaning device body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811191914.5A CN109404343B (en) | 2018-10-12 | 2018-10-12 | Silencing device, silencing system and cleaning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811191914.5A CN109404343B (en) | 2018-10-12 | 2018-10-12 | Silencing device, silencing system and cleaning equipment |
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| Publication Number | Publication Date |
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| CN109404343A CN109404343A (en) | 2019-03-01 |
| CN109404343B true CN109404343B (en) | 2021-05-18 |
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| CN201811191914.5A Active CN109404343B (en) | 2018-10-12 | 2018-10-12 | Silencing device, silencing system and cleaning equipment |
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| CN114098257A (en) * | 2021-11-05 | 2022-03-01 | 深圳素士科技股份有限公司 | Accessory and hair care equipment |
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| WO2009110060A1 (en) * | 2008-03-04 | 2009-09-11 | 東京濾器株式会社 | Sound-deadening structure of vent tube and sound-deadening structure of case |
| CN104018917A (en) * | 2014-05-30 | 2014-09-03 | 安徽同丰橡塑工业有限公司 | Noise eliminator |
| CN206000788U (en) * | 2016-08-19 | 2017-03-08 | 宁波方太厨具有限公司 | A kind of blower fan deafener of household electrical appliance |
| CN106949099B (en) * | 2017-04-28 | 2019-05-10 | 苏州市海朋电子商务有限公司 | Dust catcher motor air pump |
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