CN103381080A - Low-noise motor box of dust collector - Google Patents
Low-noise motor box of dust collector Download PDFInfo
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- CN103381080A CN103381080A CN2012101309916A CN201210130991A CN103381080A CN 103381080 A CN103381080 A CN 103381080A CN 2012101309916 A CN2012101309916 A CN 2012101309916A CN 201210130991 A CN201210130991 A CN 201210130991A CN 103381080 A CN103381080 A CN 103381080A
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- outer housing
- inner housing
- muffler
- motor box
- dust catcher
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Abstract
A low-noise motor box of a dust collector comprises an inner housing, a quadrate outer housing, an outer housing gas inlet and an exhaust port, wherein a dust collection motor is arranged in the inner housing; a vent hole is formed in the inner housing; the outer housing is arranged outside the inner housing; a certain spatial distance is kept between the inner housing and the outer housing; the outer housing comprises an outer housing body and an outer housing lid; the outer housing gas inlet is formed in the top of the outer housing lid; the exhaust port is used for allowing gas to be exhausted from the outer housing; a crack muffler is arranged in the outer housing lid; a plurality of layers of muffling cavities are arranged between the inner wall of the outer housing and the inner housing; a partition hood is arranged in the outer housing in a position on the inner surface at the rear end of the outer housing. According to the low-noise motor box, the crack muffler is arranged in the outer housing lid, and the muffling cavities and a quarter-wavelength muffler are arranged in the outer housing, so as to form a wider acting frequency band by taking a blade passing frequency (BPF) as a center and achieve the function of wide frequency band muffling; multiple methods perform functions mutually interact, so that the transmission loss of noises is increased, thereby reducing noises generated by gas exhausting of the motor housing of the dust collector.
Description
Technical field
The present invention relates to the electricapparatus equipment of dust catcher, specifically a kind of low noise motor box of dust catcher.
Background technology
Dust catcher is a kind of cleaning and sanitary electric equipment device, is used for removing the dust in ground, carpet, wall, furniture, clothing and various gaps.
Profile classification according to dust catcher can be divided into vertical type dust collector, horizontal (pot type) dust catcher and portable dust collector etc.
The dust catcher general structure comprises by the motor of dust collector that imports electric current generation suction, forms suction nozzle, the hose of air path system, filter, and the dust collect plant of assembling inhalation (inhalatio).
Motor of dust collector at the generation negative-pressure sucking of inner of dust catcher body setting is placed in motor box, and generates the Bas Discharged air-flow.
Chinese patent 101084819 discloses a kind of " vacuum cleaner ", electric machine assembly wherein, and it is used for to above-mentioned body of dust collector air amount, and its pressure is flowed; Motor housing, it includes cavity inner wall and chamber outer wall, and wherein above-mentioned cavity inner wall is configured for holding the motor cavity of said motor assembly, and above-mentioned chamber outer wall forms along the outer periphery of the above-mentioned cavity inner wall set a distance of both being separated by; Wherein upper panel is also installed on the top of the cavity inner wall of motor housing and chamber outer wall, thereby the bottom surface that forms by above-mentioned upper panel and cavity inner wall, chamber outer wall and motor housing surrounds the space that forms.But it produces the present invention in effective attenuation electric machine assembly and to the motor housing of the noise of external communication, to reduce the noise of vacuum cleaner by adopting.
Fig. 1 is the vertical profile structural representation of prior art motor casing, and as shown in Figure 1, in the inside of dust catcher body (not shown), dust sucting motor 1 is arranged in inner housing 2a, and inner housing 2a forms densely covered passage 5.The outside of inner housing 2a also is provided with the shell 13a that keeps with it the certain space distance, shell 13a is made of shell body 6a and casing cover 7a, casing cover 7a center of top on shell body 6a is formed with shell air inlet 8a, the sidewall of shell body 6a is formed with up exhaust passage outside shell, and makes clean Bas Discharged outside dust catcher body through exhaust outlet 9.
But, above-mentioned prior art have a following deficiency, too short via the air flow channel of gas in shell body 6a that discharge dust sucting motor 1 gas outlet, therefore, limited to slackening of noise, noise reduction is not obvious, can not fully solve the problem of reducing noise.
Summary of the invention
The present invention is exactly in order to solve in prior art, in the ubiquity motor casing, noise reduction utilization rate in space is low, can not bring into play the erasure effect of the confined space, cause in motor casing that gas flow is too short, the unconspicuous problem of noise reduction, and a kind of low noise motor box of dust catcher is provided.
The present invention realizes by following technical scheme.
A kind of low noise motor box of dust catcher, comprise built-in dust sucting motor and be formed with the inner housing of passage, be arranged on the outside also square shell of interval certain space distance of inner housing, shell is made of shell body and casing cover, be formed on the shell air inlet at casing cover top, and from the exhaust outlet of shell Exhaust Gas, in described casing cover, the dust sucting motor front end is provided with the crack muffler that carries out noise reduction for inhaling air stream; Be provided with multilayer chamber silencing cavity between described shell body inwall and inner housing; Described shell body rear end inner surface is provided with noise reduction and separates cover.
The present invention of design is owing to being provided with the crack muffler in casing cover like this; Be provided with multilayer chamber silencing cavity and quarter-wave muffler in shell, at first the crack muffler is subdued the noise of the component frequency in air-flow; Then the silencing cavity structure of a plurality of chambers, have several different resonant frequencies, by the wider effect frequency band of superposition formation centered by BPF of frequency, realizes the sound deadening of wideband; The noise reduction branched pipe correspondence of quarter-wave muffler by different length be the same-action frequency not, forms the wider effect frequency band centered by BPF, realizes the sound deadening of wideband; The shell body rear end is provided with silencer cover, the described silencer cover front opening that is square, the bottom surface of rear end is provided with the noise reduction through hole, and this device is done last lower noise reduction to the noise in air-flow and is processed, by the air-flow that above four kinds of noise reduction measures are processed, discharge through the exhaust outlet of shell body.Therefore, the present invention has increased the propagation loss of noise by several different methods, and then reduces the noise of motor of dust collector shell Exhaust Gas.
Description of drawings
Fig. 1 is the motor of dust collector shell structure schematic diagram of prior art;
Fig. 2 is the A-A cross-sectional view of Fig. 1;
Fig. 3 is decomposition texture schematic diagram of the present invention;
Fig. 4 is vertical profile structural representation of the present invention;
Fig. 5 is the cross-sectional structural representation of Fig. 4;
Fig. 6 is shell perspective view of the present invention;
Fig. 7 is casing cover perspective view of the present invention;
Fig. 8 is shell body perspective view of the present invention;
Fig. 9 is crack of the present invention muffler structure schematic diagram;
Figure 10 is crack of the present invention muffler principle schematic;
Figure 11 is ladder sleeve pipe perspective view of the present invention;
Figure 12 is joint sleeve perspective view of the present invention;
Figure 13 is inner shell structure schematic diagram of the present invention;
Figure 14 is broken section and the gas flow path structure schematic diagram of Figure 13;
Figure 15 is separation cover structure schematic diagram of the present invention;
Figure 16 is silencer cover structural representation of the present invention;
Figure 17 is multilayer chamber silencing cavity sound deadening band diagram of the present invention;
Figure 18 is quarter-wave muffler sound deadening band diagram of the present invention;
Figure 19 is after complete machine improves and improves front frequency noise Comparative map.
The label symbol of critical piece in figure:
1. dust sucting motor 2a.2b. inner housing
3. crack muffler 4. multilayer chamber silencing cavity
5. passage 6a.6b shell body
7a.7b casing cover 8a.8b shell air inlet
9a.9b. exhaust outlet 10. is separated cover
11. ladder sleeve pipe 12. joint sleeves
13a.13b. shell 14. anchor rings
15. noise reduction groove 16. acoustical panels
17. the front diaphragm plate of through hole 18.
19. rear squab panel 20. bar holes
21. blind hole pipe 22. baffle plates
23. silencer cover 24. noise reduction through holes
25. rubber blanket 26. joint pins
27. rubber blanket 28. shoulder holes
The specific embodiment
The present invention will be described in detail below in conjunction with drawings and Examples.
Fig. 3 is decomposition texture schematic diagram of the present invention;
Fig. 4 is vertical profile structural representation of the present invention;
Fig. 5 is the cross-sectional structural representation of Fig. 4;
Fig. 9 is crack of the present invention muffler structure schematic diagram;
Figure 10 is crack of the present invention muffler principle schematic;
As shown in Figures 9 and 10, the present invention is provided with the crack muffler in casing cover.
The crack muffler that the ladder sleeve pipe consists of is namely expanded muffler, belongs to the resistant noise-reducing device; Be the variation that utilizes pipeline section long-pending, acoustic impedance changes, and part energy is reflected back toward air inlet pipe, thereby reaches the effect of noise reduction.The advantage of this muffler takes up room little exactly.When l/d＜0.1, the performance of crack muffler is relevant with l with b, and the frequency of the less effect of b is higher, and l is less, and the effect frequency is higher.Transmission loss is relevant with l, and l is larger, and transmission loss is larger.Noise during the crack muffler can be eliminated, in low-frequency range.Simultaneously, be provided with the noise reduction groove in joint sleeve and consist of several expansion mufflers, play the effect of further noise reduction.
As shown in Fig. 3,4 and 5, be provided with multilayer chamber silencing cavity in shell.What multilayer chamber silencing cavity consisted of is that the resonator muffler is hereby muffler of Hull nurse; The volume V of resonator muffler and container is relevant with the connecting pipe sectional area with the length of connecting pipe.
Multilayer chamber silencing cavity in the present invention is by acoustical panel 16, the space between inner housing and shell to be cut apart, and is divided into a plurality of chambers; Inner housing 2 upper vent holes 5 by being arranged on two acoustical panel 16 inboards be connected described acoustical panel 16 on be provided with through hole 17 a plurality of chambers connected, thereby consist of silencing pipeline.The noise reduction chamber that designs like this, limited space in the motor casing that takes full advantage of, length and the connecting pipe sectional area of volume V and the connecting pipe of resonator muffler container have been increased, it doesn't matter due to the shape of erasure effect and silencing cavity and the shape of pipeline, therefore, the multilayer chamber silencing cavity of the present invention's design has greatly improved erasure effect.
Common Hull nurse hereby muffler can only be eliminated the noise of a frequency and near frequency band thereof.The muffler of a plurality of chambers of the present invention's design has the silencing cavity structure of a plurality of chambers, has several different resonant frequencies, by the wider effect frequency band of superposition formation centered by BPF of frequency, realizes the sound deadening of wideband.Can eliminate the noise in a plurality of frequency ranges, the noise reduction scope greatly strengthens.
As shown in Fig. 3,4 and 5, be provided with quarter-wave long tube muffler in shell, this muffler all belongs to collateral branch's muffler, is that length due to the noise reduction pipe equals 1/4th of wavelength and gets, and the frequency that quarter-wave long tube muffler abates the noise only depends on the length of pipe.
Quarter-wave long tube muffler of the present invention is arranged on separates the cover 10 inner surfaces blind hole pipe 21 that be arranged in order parallel with electrical axis; The length of the blind hole pipe 21 of described separation cover 10 bottoms shortens from bottom to top successively; The length of the blind hole pipe 21 on described separation cover 10 tops shortens from top to bottom successively; The inner surface of the described separation cover 10 that is made of blind hole pipe 21 outer faces is arc surface.
Quarter-wave long tube muffler of the present invention, inclination entrance edge lengths quarter-wave muffler, the noise reduction branched pipe correspondence by different length is the same-action frequency not, forms the wider effect frequency band centered by BPF, realizes the sound deadening of wideband.
A kind of low noise motor box of dust catcher, comprise built-in dust sucting motor 1 and be formed with the inner housing 2b of passage 5, be arranged on the outside also square shell 13b of interval certain space distance of inner housing 2b, shell 13b is made of shell body 6b and casing cover 7b, be formed on the shell air inlet 8b at casing cover 7b top, and from the exhaust outlet 9b of shell 13b Exhaust Gas; In described casing cover 7b, the dust sucting motor front end is provided with the crack muffler 3 that carries out noise reduction for inhaling air stream; Be provided with multilayer chamber silencing cavity 4 between described shell body 6b inwall and inner housing 2b; Shell body 6b rear end inner surface is provided with noise reduction and separates cover 10.
Crack of the present invention muffler 3 is for to be arranged in the ladder sleeve pipe 11 of motor front end; The excircle diameter of described ladder sleeve pipe 11 leading portions is greater than back segment excircle diameter; Ladder sleeve pipe 11 is provided with shoulder hole 28, and wherein the leading portion aperture is greater than the back segment aperture; The front end face of ladder sleeve pipe 11 and casing cover 7b right side applying; The rear end face of described ladder sleeve pipe 11 along the circumferential direction is provided with groove; 1 of described ladder sleeve pipe 11 and dust sucting motor are provided with joint sleeve 12, described joint sleeve 12 is stepped, the excircle diameter of described joint sleeve 12 leading portions is less than back segment excircle diameter, described joint sleeve 12 front ends insert in ladder sleeve pipe 11 grooves, and joint sleeve 12 anchor rings 14 are fitted with the rear end face of ladder sleeve pipe 11; Described joint sleeve 12 inner peripheral surfaces are provided with noise reduction groove 15.
Inner housing 2b cross section of the present invention is hexagon, and the two sides stage casing adjacent with hexagonal upper surface is respectively arranged with upwardly extending acoustical panel 16; Described passage 5 is arranged on the inner housing 2b of two acoustical panel 16 inboards; Be provided with through hole 17 on described acoustical panel 16; Be provided with front diaphragm plate 18 on described inner housing 2b front end face outer circle wall, in described inner housing 2b rear end face, be provided with rear squab panel 19 on the periphery wall on top; The bottom of described inner housing 2b and two sides are formed with bar hole 20.
Be provided with the quarter-wave muffler in separation cover 10 of the present invention; Described quarter-wave muffler is to be arranged on to separate the cover 10 inner surfaces blind hole pipe 21 that be arranged in order parallel with electrical axis; The length of the blind hole pipe 21 of described separation cover 10 bottoms shortens from bottom to top successively; The length of the blind hole pipe 21 on described separation cover 10 tops shortens from top to bottom successively; The inner surface of the described separation cover 10 that is made of blind hole pipe 21 outer faces is arc surface; The correspondence position that the inner upper rear end of described shell body 6b and inner housing are provided with rear squab panel 19 is provided with baffle plate 22.
Shell body of the present invention 6 rear ends are provided with silencer cover 23, described silencer cover 23 front opening that is square, and the bottom surface of rear end is provided with noise reduction through hole 24.The rear end bottom surface of shell body 6 is provided with the opening that can insert silencer cover 23.
Figure 19 be after complete machine improves with improve before the frequency noise Comparative map, as shown in the figure, experiment shows, the present invention is provided with the crack muffler in casing cover; Be provided with multilayer chamber silencing cavity and quarter-wave muffler in shell, thereby reduced the sound pressure level of complete machine, referring to table 1.
Table 1
| ? ? | Sound pressure level/dB |
| Before improvement | 69.8 |
| After improvement | 65.15 |
The low noise motor box of dust catcher of the present invention is provided with the crack muffler in casing cover; Be provided with multilayer chamber silencing cavity and quarter-wave muffler in shell, at first the crack muffler is subdued the noise of the component frequency in air-flow; Then the silencing cavity structure of a plurality of chambers, have several different resonant frequencies, by the wider effect frequency band of superposition formation centered by blade passing frequency BPF of frequency, realizes the sound deadening of wideband; The noise reduction branched pipe correspondence of quarter-wave muffler by different length be the same-action frequency not, forms the wider effect frequency band centered by blade passing frequency BPF, realizes the sound deadening of wideband; Shell body 6 rear ends are provided with silencer cover 23, described silencer cover 23 front opening that is square, the bottom surface of rear end is provided with noise reduction through hole 24, and this device is done last lower noise reduction to the noise in air-flow and is processed, by the air-flow that above four kinds of noise reduction measures are processed, discharge through the exhaust outlet of shell body.Therefore, the present invention has increased the propagation loss of noise by several different methods, and then reduces the noise of motor of dust collector shell Exhaust Gas.
Claims (10)
1. the low noise motor box of a dust catcher, comprise built-in dust sucting motor (1) and be formed with the inner housing (2b) of passage (5), be arranged on the outside also square shell (13b) of interval certain space distance of inner housing (2b), shell (13b) is made of shell body (6b) and casing cover (7b), be formed on the shell air inlet (8b) at casing cover (7b) top, and from the exhaust outlet (9b) of shell (13b) Exhaust Gas, it is characterized in that:
A. in described casing cover, dust sucting motor (1) front end is provided with the crack muffler (3) that carries out noise reduction for inhaling air stream;
B. be provided with multilayer chamber silencing cavity (4) between described shell body (13b) inwall and inner housing (2b);
C. described shell body (13b) rear end inner surface is provided with noise reduction separation cover (10).
2. the low noise motor box of dust catcher according to claim 1, it is characterized in that: described crack muffler (3) is for to be arranged in the ladder sleeve pipe (11) of motor front end.
3. the low noise motor box of dust catcher according to claim 2, it is characterized in that: the excircle diameter of described ladder sleeve pipe (11) leading portion is greater than back segment excircle diameter; Ladder sleeve pipe (11) is provided with shoulder hole (28), and wherein the leading portion aperture is greater than the back segment aperture; The front end face of ladder sleeve pipe (11) and casing cover (7b) right side applying.
4. the low noise motor box of dust catcher according to claim 2, it is characterized in that: the rear end face of described ladder sleeve pipe (11) along the circumferential direction is provided with groove; Be provided with joint sleeve (12) between described ladder sleeve pipe (11) and dust sucting motor (1), described joint sleeve (12) is stepped, the excircle diameter of described joint sleeve (12) leading portion is less than back segment excircle diameter, described joint sleeve (12) front end inserts in ladder sleeve pipe (11) groove, and joint sleeve anchor ring (14) is fitted with the rear end face of ladder sleeve pipe (11).
5. the low noise motor box of dust catcher according to claim 4, it is characterized in that: described joint sleeve (12) inner peripheral surface is provided with noise reduction groove (15).
6. the low noise motor box of dust catcher according to claim 1, it is characterized in that: described inner housing (2b) cross section is hexagon, and the two sides stage casing adjacent with hexagonal upper surface is respectively arranged with upwardly extending acoustical panel (16); Described passage (5) is arranged on the inboard inner housing (2b) of two acoustical panels (16); Be provided with through hole (17) on described acoustical panel (16); Be provided with front diaphragm plate 18 on described inner housing (2b) front end face outer circle wall, in described inner housing rear end face, be provided with rear squab panel (19) on the periphery wall on top; The bottom of described inner housing (2b) and two sides are formed with bar hole (20).
7. the low noise motor box of dust catcher according to claim 1, is characterized in that: be provided with the quarter-wave muffler in described separation cover (10); Described quarter-wave muffler is separated cover (10) inner surface blind hole pipe (21) of being arranged in order parallel with electrical axis for being arranged on.
8. the low noise motor box of dust catcher according to claim 1 is characterized in that: the length of the blind hole pipe (21) of described separation cover (10) bottom shortens from bottom to top successively; The length of the blind hole pipe (21) on described separation cover (10) top shortens from top to bottom successively; The inner surface of the described separation cover (10) that is made of blind hole pipe (21) outer face is arc surface.
9. the low noise motor box of dust catcher according to claim 1, it is characterized in that: the correspondence position that the inner upper rear end of described shell body (6b) and inner housing (2b) are provided with rear squab panel (19) is provided with baffle plate (22).
10. the low noise motor box of dust catcher according to claim 1 is characterized in that: described shell body (6b) rear end is provided with silencer cover (23), described silencer cover (23) front opening that is square, and the bottom surface of rear end is provided with noise reduction through hole (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101309916A CN103381080A (en) | 2012-05-02 | 2012-05-02 | Low-noise motor box of dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101309916A CN103381080A (en) | 2012-05-02 | 2012-05-02 | Low-noise motor box of dust collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103381080A true CN103381080A (en) | 2013-11-06 |
Family
ID=49489157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101309916A Pending CN103381080A (en) | 2012-05-02 | 2012-05-02 | Low-noise motor box of dust collector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103381080A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108064140A (en) * | 2017-06-01 | 2018-05-22 | 苏州佳亿达电器有限公司 | Low noise cleaner air exhausting device |
| WO2018219666A1 (en) * | 2017-05-31 | 2018-12-06 | Alfred Kärcher SE & Co. KG | Cleaning appliance |
| WO2019011314A1 (en) * | 2017-07-14 | 2019-01-17 | 美的集团股份有限公司 | Vacuum cleaner and motor module thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004081428A (en) * | 2002-08-26 | 2004-03-18 | Toshiba Tec Corp | Vacuum cleaner |
| CN201230860Y (en) * | 2008-04-01 | 2009-05-06 | 汪伟 | Dust collector with silencing structure |
| CN102082480A (en) * | 2009-11-27 | 2011-06-01 | 乐金电子(天津)电器有限公司 | Motor cover |
| CN102142732A (en) * | 2010-02-01 | 2011-08-03 | 乐金电子(天津)电器有限公司 | Layered runner motor shell of dust collector |
| CN102377278A (en) * | 2010-08-12 | 2012-03-14 | 乐金电子(天津)电器有限公司 | Motor casing with layered long flow channels |
-
2012
- 2012-05-02 CN CN2012101309916A patent/CN103381080A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004081428A (en) * | 2002-08-26 | 2004-03-18 | Toshiba Tec Corp | Vacuum cleaner |
| CN201230860Y (en) * | 2008-04-01 | 2009-05-06 | 汪伟 | Dust collector with silencing structure |
| CN102082480A (en) * | 2009-11-27 | 2011-06-01 | 乐金电子(天津)电器有限公司 | Motor cover |
| CN102142732A (en) * | 2010-02-01 | 2011-08-03 | 乐金电子(天津)电器有限公司 | Layered runner motor shell of dust collector |
| CN102377278A (en) * | 2010-08-12 | 2012-03-14 | 乐金电子(天津)电器有限公司 | Motor casing with layered long flow channels |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018219666A1 (en) * | 2017-05-31 | 2018-12-06 | Alfred Kärcher SE & Co. KG | Cleaning appliance |
| CN108064140A (en) * | 2017-06-01 | 2018-05-22 | 苏州佳亿达电器有限公司 | Low noise cleaner air exhausting device |
| WO2018218591A1 (en) * | 2017-06-01 | 2018-12-06 | 苏州佳亿达电器有限公司 | Low-noise air discharging device for dust collector |
| WO2019011314A1 (en) * | 2017-07-14 | 2019-01-17 | 美的集团股份有限公司 | Vacuum cleaner and motor module thereof |
| CN109247865A (en) * | 2017-07-14 | 2019-01-22 | 美的集团股份有限公司 | Dust catcher and its motor mould group |
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Effective date of registration: 20160503 Address after: 210014 Yongfeng Road, Qinhuai District, Jiangsu, No. 28, No. Applicant after: Nanjing LG Panda Appliances Co., Ltd. Address before: 300402 Tianjin city Beichen District Xingdian Road Applicant before: Lejin Electronic and Electric Appliance Co., Ltd. (Tianjin) |
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Application publication date: 20131106 |