CN201253175Y - Cleaner multilevel noise reduction device - Google Patents
Cleaner multilevel noise reduction device Download PDFInfo
- Publication number
- CN201253175Y CN201253175Y CNU2008201218973U CN200820121897U CN201253175Y CN 201253175 Y CN201253175 Y CN 201253175Y CN U2008201218973 U CNU2008201218973 U CN U2008201218973U CN 200820121897 U CN200820121897 U CN 200820121897U CN 201253175 Y CN201253175 Y CN 201253175Y
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- Prior art keywords
- electric fan
- noise reduction
- cleaner
- collapsible tube
- tube support
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Abstract
The utility model relates to a multi-stage noise reducer of a suction cleaner, which comprises an electric blower and a suction cleaner base supporting the electric blower. The periphery of the electric blower is provided with an inner hood and an outer hood of the electric blower, and the inner hood and the outer hood have a mutual interval. A resonance chamber and an airtight expansion chamber which are separated by a contraction pipe support are arranged between the inner hood and the outer hood, and the contraction pipe support is provided with a contraction pipeline connected with an air inlet and an air outlet. At least one contraction pipe support can be connected between the inner hood and the outer hood. The contraction pipeline arranged on the contraction pipe support can be a small hole vertical to the contraction pipe support, and the cross section of the small hole can be in various shapes. The utility model has compact structure, the electric blower is coaxial with the inner hood and the outer hood of the electric blower so that the occupied space and the size are small, the utility model can weaken a sound wave generated by the electric blower for a plurality of times on the emergent interface by a plurality of expansion and contraction times of the resonance chamber, the expansion chamber and the contraction pipe, and the noise reduction effect is obvious.
Description
Technical field
The utility model relates to a kind of manufacturing technology field of vacuum cleaner, and especially a kind of being installed on can make dust catcher reduce the noise reduction device of noise in use on the dust catcher electric fan.
Background technology
Vacuum cleaner is mainly used on the suction ground or the dust in the slit, and the air that will contain dirt sucks dust catcher inside and discharges from outlet after separating.Because the inhaled air air-flow produces judder in the passage that is arranged at dust catcher inside, can produce very big noise.Simultaneously the air-flow that rotation sucked of high speed electric fan also can produce judder and in producing, low frequency noise, these noises make the dust catcher user and when using all personnel on the scene all feel to be difficult to stand.In order to address this problem, people attempt to adopt the whole bag of tricks to reduce the dust catcher noise.The most frequently used way is that the exhaust passage of electric fan is designed to bend, perhaps be designed to the passage in similar labyrinth, and on air passage wall, paste sound-absorbing material, this device is to utilize resistive noise reduction principle, really can reduce the noise that part that electric fan produces belongs to middle and high frequency, for example the grating of the electric spark of brush, bearing and electromagnetic noise etc.For the howling of another part low and medium frequency, eliminate as electric fan work space-time air pressure noise generated just being difficult to that contract.Chinese patent on July 28th, 2004 disclosed publication number be " CN1515219.A ", " noise absorption unit of dust collector ", it adopts the airtight expansion chambers that is installed on the air-out passage, the two ends of expansion chambers are provided with respectively and channel attached air inlet of air-out and air outlet, be provided with the sound gobo of separating air inlet and air outlet in the expansion chambers, be furnished with aperture on the sound gobo.Though this device can reduce the noise that dust catcher sends in use, but owing to be installed on the exhaust outlet of dust catcher, not only set up additional device, increased the dust catcher volume, as do small size then it when eliminating electric fan work to air during compression is produced, the low frequency noise effect is undesirable, because the design principle according to this silencing means should be the reactive muffling principle, according to this principle, the length L of expansion with had such relation: λ=4L by the wavelength X of noise elimination ripple.Be difficult to carry out in actual use.
Summary of the invention
The purpose of this utility model is at the defective of above-mentioned prior art and deficiency, for the dust catcher manufacturing provides a kind of compact conformation, to take the dust catcher inner space few, to in reducing, the tangible cleaner multilevel noise reduction device of low frequency noise, to satisfy users' demand.
For achieving the above object, technical solution adopted in the utility model is: a kind of cleaner multilevel noise reduction device, the dust catcher base that it comprises electric fan and supports it, the periphery of described electric fan is provided with the electric fan of spacing inner cover and outer cover mutually, is provided with the resonant chamber and the airtight expansion chambers of being kept apart by the collapsible tube support between electric fan inner cover and outer cover; On described collapsible tube support, offer the contraction pipeline that is communicated with air inlet and air outlet.
The described collapsible tube support that is connected between electric fan inner cover and outer cover can be one or more.
The described contraction pipeline that is opened on the collapsible tube support can be perpendicular to perpendicular, the horizontal elongated cylindrical void or the variform aperture of collapsible tube support.
Described collapsible tube support radially is connected between electric fan inner cover outer peripheral face and the outer cover inwall along electric fan.
Described collapsible tube support also can be along axial upper and lower being connected in turn between electric fan inner cover outer peripheral face and the outer cover inwall of electric fan.
Compared with prior art, the utility model compact conformation, electric fan inner cover and outer cover and motor coaxle setting, do not account for the dust catcher space in addition, volume is small and exquisite, and the sound wave that it can send electric fan obtains reflection at the interface, interferes through the sudden change of resonant chamber, expansion chambers and collapsible tube, makes the energy of sound wave obtain decay, and through experiment test repeatedly, noise reduction audio fruit obviously is better than like product.
Description of drawings
Fig. 1 is a kind of structural representation of the present utility model.
Fig. 2 is A-A cutaway view of Fig. 1.
Fig. 3, Fig. 4 are two kinds of different cross section figure that shrink pipeline among Fig. 1.
Fig. 5 is at a kind of structural representation of the circular outer cover of the utility model.
Fig. 6 is another structural representation of the present utility model.
Fig. 7 is an another kind of structural representation of the present utility model.
Fig. 8 is B-B cutaway view of Fig. 7.
The specific embodiment
Embodiment 1:
Fig. 1, Fig. 2, Fig. 3, Fig. 4 are a kind of embodiment of the utility model.
This cleaner multilevel noise reduction device comprises electric fan 3 and its dust catcher base 7 of supporting.Being peripherally equipped with of electric fan the motor of spacing inner cover 5 and outer cover 6 are arranged mutually, make the interior air channel 4 and the outer air channel that form circulation of air between electric fan 3 and motor inner cover 5 and motor inner cover and the outer cover.Electric fan inner cover 5 among the figure is rounded, and outer cover 6 is rectangular or circular.Insert one or several collapsible tube support 1 in the outer air channel between electric fan inner cover 5 and outer cover 6 vertically, it is isolated into the airtight expansion chambers 9 that resonant chamber 8 that an air inlet joins and a plurality of length differ with outer air channel.Offer vertical with it contraction pipeline 2 on collapsible tube support 1, this contraction pipeline 2 can be difformity, the different aperture of arranging (as shown in Figure 3), also can be erect, horizontal elongated cylindrical void (as shown in Fig. 1, Fig. 4).Each shrinks the pipeline area of section and is preferably less than 80mm
2, greater than 2mm
2The two ends of expansion chambers 9 are connected with air inlet and air outlet 10 respectively by collapsible tube 2.Interference noise-cancelling theory according to reactive muffler, the length of expansion chambers, promptly the length in expansion chambers air channel is just shunk the functional relation of the vertical range of collapsible tube support 1 of pipeline or the distance L between the two collapsible tube supports and the sound wave λ that is eliminated the noise and is to having air-out from outer cover: λ=4L.Therefore the size of expansion chambers and length will serve as according to setting by experiment with the structure and the electrical quantity of electric fan.
Embodiment 2:
Fig. 5 is another kind of embodiment of the present utility model.The motor inner cover 5 and the outer cover 6 collapsible tube support 1 all rounded, that have the contraction pipeline 2 of aperture or elongate strip pore that are arranged at electric fan 3 peripheries among this embodiment radially are connected between motor inner cover 5 and the outer cover 6, with this outer air channel radially is separated into several not of uniform size or uniform expansion chambers 9, all the other structures are identical with embodiment 1.
Embodiment 3:
Fig. 6 is another embodiment of the present utility model.Collapsible tube support 1 can be along axial upper and lower being connected between motor inner cover 5 and the outer cover 6 of electric fan successively in the present embodiment, the collapsible tube support is offered the contraction pipeline 2 of variform aperture or elongate strip pore, these apertures or elongate strip pore be dislocation mutually preferably, and it is divided into resonant chamber 8 that is communicated with air inlet and the upper and lower vertically several expansion chambers 9 that are positioned at resonant chamber 8 back to outer air channel.All the other structures are identical with embodiment 1.
Embodiment 4:
Fig. 7, Fig. 8 are another kind of embodiment of the present utility model.The motor inner cover 5 and the outer cover 6 of present embodiment are arranged on the one-sided of electric fan, have the air outlet in air channel outward on the motor inner cover 5.Collapsible tube support 1 can be along axial upper and lower being connected between motor inner cover 5 and the outer cover 6 of electric fan successively, offer the contraction pipeline 2 of variform aperture or elongate strip pore on each adjacent collapsible tube support, these apertures or elongate strip pore be dislocation mutually preferably, and it is divided into resonant chamber 8 that is communicated with air inlet and the upper and lower vertically several expansion chambers 9 that are positioned at resonant chamber 8 back to outer air channel.All the other structures are identical with embodiment 1.
Further narrate its operation principle below in conjunction with accompanying drawing.Power-on, electric fan start, and air enters the other resonant chamber 9 that connects through interior air channel after sucking electric fan, make some frequency sound wave of propagating along the air channel the obtaining reflection at the interface, interfere of resonant chamber 9 sudden changes, and the noise of this frequency is decayed.Further enter the expansion chambers 9 of expansion then suddenly from the contraction pipeline 2 that is opened in contraction support 1, the noise of another frequency is further decayed, the contraction pipeline 2 that shrinks on the support 1 from the next one again enters next expansion chambers again, with this through more piece expansion chamber, since the length L of each expansion chamber do not wait, the sound wave of each frequency obtains reflection at the interface, interferes and decay sudden change again and again, has reached in reducing, the purpose of low frequency noise.
Claims (8)
1, a kind of cleaner multilevel noise reduction device, the dust catcher base (7) that it comprises electric fan (3) and supports it, the periphery that it is characterized in that described electric fan (3) is provided with the electric fan of spacing inner cover (5) and outer cover (6) mutually, between electric fan inner cover (5) and outer cover, be provided with the airtight expansion chambers (9) of keeping apart, on described collapsible tube support, offer the contraction pipeline (2) that is communicated with air inlet and air outlet (10) by collapsible tube support (1).
2, cleaner multilevel noise reduction device according to claim 1 is characterized in that caning one or more at described collapsible tube support (1).
3, cleaner multilevel noise reduction device according to claim 1 and 2 is characterized in that the described contraction pipeline (2) that is opened on the collapsible tube support (1) can be perpendicular to perpendicular, the horizontal elongated cylindrical void or the variform aperture of collapsible tube support (1).
4, cleaner multilevel noise reduction device according to claim 1 and 2 is characterized in that described collapsible tube support (1) radially is connected between electric fan inner cover (5) outer peripheral face and outer cover (6) inwall along electric fan.
5, cleaner multilevel noise reduction device according to claim 3 is characterized in that described collapsible tube support (1) radially is connected between electric fan inner cover (5) outer peripheral face and outer cover (6) inwall along electric fan.
6, cleaner multilevel noise reduction device according to claim 1 and 2 is characterized in that described collapsible tube support (1) is along axial upper and lower being connected in turn between electric fan inner cover (5) outer peripheral face and outer cover (6) inwall of electric fan.
7, cleaner multilevel noise reduction device according to claim 3 is characterized in that described collapsible tube support (1) is along axial upper and lower being connected in turn between electric fan inner cover (5) outer peripheral face and outer cover (6) inwall of electric fan.
8, cleaner multilevel noise reduction device according to claim 7 is characterized in that described electric fan inner cover (5) and outer cover (6) are arranged on the one-sided of electric fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201218973U CN201253175Y (en) | 2008-07-23 | 2008-07-23 | Cleaner multilevel noise reduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201218973U CN201253175Y (en) | 2008-07-23 | 2008-07-23 | Cleaner multilevel noise reduction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201253175Y true CN201253175Y (en) | 2009-06-10 |
Family
ID=40736481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201218973U Expired - Fee Related CN201253175Y (en) | 2008-07-23 | 2008-07-23 | Cleaner multilevel noise reduction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201253175Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104083127A (en) * | 2014-06-27 | 2014-10-08 | 莱克电气股份有限公司 | Dust collector with motor suspension fixing structure |
| CN106859494A (en) * | 2017-04-24 | 2017-06-20 | 江苏美的清洁电器股份有限公司 | The motor cover body and dust catcher of dust catcher |
| CN110165832A (en) * | 2018-06-25 | 2019-08-23 | 宁波洒哇地咔电器有限公司 | Electric machine structure and dust catcher |
-
2008
- 2008-07-23 CN CNU2008201218973U patent/CN201253175Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104083127A (en) * | 2014-06-27 | 2014-10-08 | 莱克电气股份有限公司 | Dust collector with motor suspension fixing structure |
| CN106859494A (en) * | 2017-04-24 | 2017-06-20 | 江苏美的清洁电器股份有限公司 | The motor cover body and dust catcher of dust catcher |
| CN110165832A (en) * | 2018-06-25 | 2019-08-23 | 宁波洒哇地咔电器有限公司 | Electric machine structure and dust catcher |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090610 Termination date: 20120723 |