CN105007792A - Arrangement in a vacuum cleaner for reducing noise - Google Patents

Arrangement in a vacuum cleaner for reducing noise Download PDF

Info

Publication number
CN105007792A
CN105007792A CN201380074184.XA CN201380074184A CN105007792A CN 105007792 A CN105007792 A CN 105007792A CN 201380074184 A CN201380074184 A CN 201380074184A CN 105007792 A CN105007792 A CN 105007792A
Authority
CN
China
Prior art keywords
main body
baffle plate
plate main
dust bag
vacuum cleaner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201380074184.XA
Other languages
Chinese (zh)
Other versions
CN105007792B (en
Inventor
汤米·安德松
罗格·卡尔松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electrolux AB
Original Assignee
Electrolux AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electrolux AB filed Critical Electrolux AB
Publication of CN105007792A publication Critical patent/CN105007792A/en
Application granted granted Critical
Publication of CN105007792B publication Critical patent/CN105007792B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/12Dry filters
    • A47L9/122Dry filters flat
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/0081Means for exhaust-air diffusion; Means for sound or vibration damping

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Suction Cleaners (AREA)

Abstract

The present invention relates to an arrangement (1) in a vacuum cleaner (2) for reducing noise emitted from a motor chamber (3) in said vacuum cleaner (2). The arrangement comprises a dust bag chamber (4), adapted to enclose a dust bag, and a motor chamber (3), adapted to comprise at least a motorized fan. The arrangement further comprises an intake air passage opening (5) arranged between said dust bag (4) chamber and said motor chamber (3), through which intake air is adapted to travel from said dust bag chamber (4) into said motor chamber (3). The dust bag chamber (4) and said motor chamber (3) are integrated in said vacuum cleaner (2). A baffle body (6), adapted to redirect said emitted noise, is arranged in said dust bag chamber (4) such that said baffle body (6) at least partly covers said intake air passage opening (5). The present invention further relates to a filter grille (13) for vacuum cleaner (2) comprised in such an arrangement (1), and a vacuum cleaner (2) comprising such an arrangement (1).

Description

For reducing the device of noise in vacuum cleaner
Technical field
The present invention relates to for reducing the device of the noise that described vacuum cleaner sends, the filter grid be included in this device in vacuum cleaner, and comprise the vacuum cleaner of this device according to independent claims preamble.
Background technology
The sound level raised normally makes us bothering, and it causes angry and sometimes can produce pressure.Such as, in indoor environment, be even low to moderate 40dB (A) (about high as refrigerator) sound level and also make us bothering.
Affect the sound level in indoor environment and the example that the household electrical appliance of the sound level of bothering are made us in generation is vacuum cleaner.In vacuum cleaner, the source of noise is fan and motor.Usually, the bag cover and the fan that comprise dust bag are connected via feeding air duct with motor cover (comprising motorized fan), can enter motor and fan guard to make the feeding air from dust bag cover.Filter can be arranged to and be connected with feeding air duct, and described filter is suitable for filtering feeding air, and if dust bag breaks, filter is also used as the filter of taking precautions against natural calamities of protection motor.
In addition, motor cover comprises air exit, and waste gas to flow out to the surrounding air vacuum cleaner from motor cover by described air exit.The inferior position with feeding air passages openings is that the noise sent by motor and fan guard can pass described feeding and described filter, and this can cause the sound level increased.
EP2374394A1 discloses the example of bag type vacuum dust catcher, it illustrates vacuum cleaner, and described vacuum cleaner has the maintenance grid for keeping electric motor protecting filter be arranged in rotary manner between dust gathering arrester and motor cover.Lock cell will keep grid to lock at position of rotation.Lock cell is disposed in the region of the hinge type side keeping grid.Standing protuberance and depressed part are used as the lock cell that locking keeps grid, and wherein depressed part is corresponding with standing protuberance.Depressed part has the ridge that can be contacted by standing protuberance.Ridge stretches out from the surface wherein forming depressed part.
Now, from different viewpoints, (such as noise) design vacuum cleaner is to be optimized it usually.But because sound level normally merits attention in indoor environment (such as in family), therefore inventor of the present invention recognizes the demand to the vacuum cleaner improved further for sound level.
Therefore, the object of this invention is to provide a kind of device for reducing the noise sent from vacuum cleaner, this apparatus cost is cheap, be easy to manufacture and manufacture simple.
Another object of the present invention is to provide a kind of vacuum cleaner, and described vacuum cleaner provides the sound level of total reduction.
Summary of the invention
Above-mentioned purpose can be realized by the present invention according to independent claims.
Preferred embodiment is described in dependent claims.
According to the present invention, the device for reducing the noise sent from the motor cover described vacuum cleaner in vacuum cleaner comprises the dust bag cover being suitable for encirclement dust bag and the motor cover being suitable at least comprising motorized fan.Described layout comprises the feeding air passages openings be arranged between described dust bag cover and described motor cover further, and feeding air is suitable for flowing into described motor cover by described feeding air passages openings from described dust bag cover.Dust bag cover and motor cover are integrated in described vacuum cleaner.The noise being suitable for sending described in making changes nyctitropic baffle plate main body and is disposed in described dust bag cover, covers described feeding air passages openings at least in part to make described baffle plate main body.
On the other hand, the present invention relates to the filter grid for vacuum cleaner, described filter grid is included in the device for reducing the noise sent from the motor cover described vacuum cleaner.
Further, the present invention relates to the vacuum cleaner of the device comprised for reducing the noise sent from the motor cover vacuum cleaner.
Accompanying drawing explanation
Fig. 1 illustrates bag type vacuum dust catcher according to an embodiment of the invention, and described bag type vacuum dust catcher comprises the layout for reducing the noise sent from the motor cover described vacuum cleaner.
Fig. 2 illustrates filter grid according to an embodiment of the invention, and described filter grid is included in the layout for reducing the noise sent from the motor cover of described vacuum cleaner, and described filter grid comprises baffle plate main body.
Fig. 3 illustrates the side view of the filter grid shown in Fig. 2 according to an embodiment of the invention.
Fig. 4 illustrates dust bag cover according to an embodiment of the invention and filter grid, and described filter grid covers the feeding air duct in the partition wall be arranged between dust bag cover and motor cover.
Detailed description of the invention
The application in the whole text in, word " top " refers to when vacuum cleaner is flatly placed on floor (as shown in Figure 1), is positioned at from stayed surface (such as floor) part farthest.Word " below " refers to and is positioned near surface-supported part.
Fig. 1 illustrates the phantom of the device 1 in vacuum cleaner 2 according to an embodiment of the invention, and device 1 is for reducing the noise sent from the motor cover 3 vacuum cleaner 2.Device 1 comprises the dust bag cover 4 being suitable for surrounding dust bag and the motor cover 3 being suitable at least comprising motorized fan (not shown).Feeding air passages openings 5 is arranged between dust bag cover 4 and motor cover 3, and by described feeding air passages openings 5, feeding air is suitable for flowing into motor cover 3 from dust bag cover 4.Dust bag cover 4 and motor cover 3 are integrated in vacuum cleaner 2.The noise being suitable for making to send changes nyctitropic baffle plate main body 6 and is disposed in dust bag cover 4, covers feeding air passages openings 5 at least in part to make baffle plate main body 6.Baffle plate main body 6 is arranged, and be suitable for the direction changing the noise (travelling across air passages openings 5) sent to make it, therefore, baffle plate main body 6 reduces the sonic transmissions in vacuum cleaner 2.
In one embodiment, as shown in fig. 1, baffle plate main body 6 is suitable for the upper section 7 at least covering air passages openings 5.Baffle plate main body 6 is suitable for making the direction of noise to change into: partly on the direction of the inferior portion 8 towards air passages openings 5, and partly returning on the direction entering motor cover 3.Advantageously, the direction changing the noise sent prevents or at least reduces the transmission of the sound wave in vacuum cleaner 2, wherein reduces the noise sent from vacuum cleaner.Approx, the sound level sent from vacuum cleaner is reduced about 0.3-0.5dB (A) by baffle plate main body.
According to an embodiment, as shown in fig. 1, air passages openings 5 has a region, and baffle plate main body 6 covers the about 5%-50% in described region.Described region is about 1300-4500mm 2.In addition, feeding air passages openings 5 can have arbitrary shape, such as rectangle or circle or arbitrarily other suitable shape.
In one embodiment, as shown in fig. 1, baffle plate main body 6 is hollow and forms path 9, and feeding air is suitable for travelling across described path 9.Path 9 guarantees that feeding air freely can flow into motor cover from dust bag cover 4.In addition, sound wave is reflected in path, and the noise wherein sent is changed direction and advantageously reduces sound level.Certainly, feeding air is not travelled across feeding air passages openings 5 by the other parts that baffle plate main body 6 covers also by opening 5.
According to an embodiment, equally as shown in fig. 1, baffle plate main body 6 is arranged, to make it extend from the top edges 10 of air passages openings 5, and to downward-extension on the direction of the relative inferior portion 8 towards air passages openings 5.Baffle plate main body 6 is preferably made up of any duroplasts, or changes nyctitropic arbitrarily other similar material by the sound being suitable for making to send and make.
In one embodiment, as shown in fig. 1, baffle plate main body 6 comprises at least along the attachment part 11 that top edges 10 is attached.Baffle plate main body 6 can be detachable, or can with other suitable characteristic (partition wall 18 such as, between dust bag cover 4 with motor cover 3) is mutually integrated arbitrarily.Baffle plate main body 6 is preferably attached to partition wall 18 or filter grid 13 securely, is limited to enter dust bag cover 4 to make the noise (at least in part) sent.Advantageously, detachable baffle plate main body 6 provides greater flexibility for user and is convenient to the clean of vacuum cleaner 2 inside.
In one embodiment, as shown in fig. 1, baffle plate main body 6 is provided with bend 12 and wherein the bend angles alpha of bend 12 is about 10-90 °.Bending baffle plate main body 6 reflective sound wave in a desired direction, and change the direction of the noise sent thus, wherein sound level is reduced.
According to an embodiment, as shown in Figure 1, bend angles alpha is about 90 °.Favourable part is like this: the partial noise (i.e. acoustic wave segment) sent is reflected back toward in motor cover, and partial noise is reflected as on the direction of the inferior portion 17 towards dust bag cover 4 directed.
According to an embodiment (see Fig. 3), baffle plate main body 6 has the inner side 15 towards path 9 orientation, and wherein inner side 15 is provided with sound-absorbing material (not shown).Material can be arbitrary noiseabsorbingpiston material, such as, has the material of the T-Plasztik bullets 30301 of 100%PES fiber.The thickness preferably 4-6mm of material.The favourable part of sound-absorbing material is: reduce Acoustic Wave Propagation, and therefore reduces the sound level from vacuum cleaner 2 further.
On the other hand, as shown in Figure 2, the present invention relates to for vacuum cleaner 2, the filter grid 13 be included in device 1 as above.In embodiment in fig. 2, filter grid 13 is suitable for being arranged in dust bag cover 4, covers the feeding air passages openings 5 be arranged between dust bag cover 4 and motor cover 3 to make it in essence.Baffle plate main body 6 is attached to filter grid 13 along at least one filter grid edge 14 of filter grid 13, thus makes the noise being suitable for making to send change nyctitropic baffle plate main body 6 to cover feeding air passages openings 5 at least in part.According to the present invention, the baffle plate main body 6 being attached to filter grid 13 is favourable in the following areas, that is, the conventional filters grid 13 be arranged on conventional filters grid support thing easily can be changed to the filter grid 13 being provided with baffle plate main body 6.Therefore, the baffle plate main body 6 being attached to filter grid 13 is convenient to the installation of the baffle plate main body 6 in vacuum cleaner 2.
In embodiment in fig. 2, baffle plate main body 6 is mutually integrated with filter grid 13.Filter grid 13 has filter grid region, and the about 5%-50% of baffle plate main body 6 precoat filter grid region.
Fig. 3 illustrates the side view comprising the filter grid 13 of baffle plate main body 6 shown in Fig. 2.As described above, baffle plate main body 6 has the inner side 15 towards path 9 orientation, and inner side 15 can be provided with the sound-absorbing material being suitable for absorbing the noise sent.Therefore, the inner side 15 of baffle plate main body 6 and the front side 19 of filter grid 13 are arranged to a distance D apart.Distance D preferably between 10-30mm, and is more preferably 15mm.Baffle plate main body 6 makes the direction of the noise sent change into, partly on the direction towards relative filter grid edge 16 and partly return and enter motor cover 3.
Further, the present invention relates to the vacuum cleaner 2 comprising device 1 described above and as shown in Figure 1.
In one embodiment, vacuum cleaner 2 comprises the dust bag cover 4 being suitable for encirclement dust bag and the motor cover 3 at least comprising motorized fan (not shown).Vacuum cleaner 2 comprises feeding air passages openings 5 further, and feeding air is suitable for flowing to motor cover 3 by described feeding air passages openings 5 from dust bag cover 4.Cover 3,4 is integrated in vacuum cleaner 2.The noise being suitable for making to send changes nyctitropic baffle plate main body 6 and is arranged in integrated belt cover 4, covers feeding air passages openings 5 at least in part to make baffle plate main body 6.The vacuum cleaner 2 being provided with this device provides the sound level of the total reduction sent from vacuum cleaner 2, because this device makes the noise sent change direction, thus makes less noise arrive the outside of vacuum cleaner 2.
In one embodiment, as shown in Figure 4, vacuum cleaner 2 comprises the partition wall 18 be arranged between dust bag cover 4 and motor cover 3, and described partition wall 18 comprises feeding air passages openings 5.Dust bag cover 4 is suitable for comprising dust bag (not shown).
In the embodiment illustrated in figure 4, the filter grid 13 comprising baffle plate main body 6 is attached to partition wall 18, and filter grid 13 is arranged, and covers feeding air passages openings 5 in essence to make filter grid 13.Baffle plate main body 6 is integrated with filter grid 13.
In another embodiment, baffle plate main body 6 is attached to partition wall 18, that is, baffle plate main body 6 is directly attached to partition wall 18 and independent filter grid is arranged to and covers feeding air passages openings 5 in essence.Baffle plate main body 6 is arranged, with the about 5%-50% making it cover feeding air passages openings 5.Therefore, baffle plate main body 6 also partly precoat filter grid.In a similar fashion, as in the integrated example of baffle plate main body 6 and filter grid 13, baffle plate main body 6 is hollow and forms path 9, and feeding air is suitable for travelling across path 9.
The invention is not restricted to above-mentioned preferred embodiment.Can use multiple substitute, amendment and equivalents.Therefore, above-described embodiment should not be used for limiting the scope of the present invention limited by the claim of enclosing.

Claims (15)

1. in vacuum cleaner (2) for reducing the device of the noise sent from the motor cover (3) described vacuum cleaner (2), described device comprises:
-dust bag cover (4), described dust bag cover (4) is suitable for surrounding dust bag;
-motor cover (3), described motor cover (3) is suitable at least comprising motorized fan;
-feeding air passages openings (5), described feeding air passages openings (5) is arranged between described dust bag cover (4) and described motor cover (3), and feeding air is suitable for flowing into described motor cover (3) by described feeding air passages openings (5) from described dust bag cover (4);
Described dust bag cover (4) and described motor cover (3) are integrated in described vacuum cleaner (2), the noise being wherein suitable for sending described in making changes nyctitropic baffle plate main body (6) and is disposed in described dust bag cover (4), covers described feeding air passages openings (5) at least in part to make described baffle plate main body (6).
2. device according to claim 1, wherein said baffle plate main body (6) is suitable for the upper section (7) at least covering described air passages openings (5).
3. the device according to any one of claim 1-2, wherein said air passages openings (5) has a region, and wherein said baffle plate main body (6) covers the about 5%-50% in described region.
4. the device according to any one of claim 1-3, wherein said baffle plate main body (6) is hollow and forms path (9), and described feeding air is suitable for travelling across described path (9).
5. the device according to any one of claim 1-4, wherein said baffle plate main body (6) is arranged, to make its top edges from described air passages openings (5) (10) extend, and to downward-extension on the direction of the relative inferior portion (8) towards described air passages openings (5).
6. device according to claim 5, wherein said baffle plate main body (6) comprises the attachment part (11) be at least attached along described top edges (10).
7. the device according to any one of claim 1-6, wherein said baffle plate main body (6) is provided with bend (12), and the bend angles alpha of wherein said bend is about 10 °-90 °.
8. device according to claim 7, wherein said bend angles alpha is about 90 °.
9. the device according to any one of claim 1-8, wherein said baffle plate main body (6) has towards the directed inner side (15) of described path (9), and wherein said inner side (15) are provided with sound-absorbing material.
10. be included in the filter grid (13) for vacuum cleaner (2) in the device according to aforementioned arbitrary claim, described filter grid (13) is suitable for being arranged in described dust bag cover (4), the described feeding air passages openings (5) be arranged between described dust bag cover (4) and described motor cover (3) is covered in essence to make it, wherein said baffle plate main body (6) is attached to described filter grid (13) along at least one filter grid edge (14) of described filter grid (13), the noise making to be suitable for send described in making changes nyctitropic described baffle plate main body (6) and covers described feeding air passages openings (5) at least in part.
11. filter grids according to claim 10, wherein said baffle plate main body (6) is integrated with described filter grid (13).
12. filter grids according to any one of claim 10-11, wherein said filter grid (13) has filter grid region, and wherein said baffle plate main body (6) covers the 5%-50% of described filter grid region.
13. vacuum cleaners (2) comprising the device according to claim 1-9, wherein said vacuum cleaner (2) comprising:
Dust bag cover (4), described dust bag cover (4) is suitable for surrounding dust bag;
Motor cover (3), described motor cover (3) at least comprises motor-driven fan;
Feeding air passages openings (5), feeding air is suitable for flowing to described motor cover (3) by described feeding air passages openings (5) from described dust bag cover (4), and wherein said cover (3,4) is integrated in described vacuum cleaner (2), the noise being wherein suitable for sending described in making changes nyctitropic described baffle plate main body (6) and is arranged in described integrated belt cover (4), covers described feeding air passages openings (5) at least in part to make described baffle plate main body (6).
14. vacuum cleaners according to claim 13, wherein said vacuum cleaner (2) comprises the partition wall (18) be arranged between described dust bag cover (4) and described motor cover (3), described partition wall comprises described feeding air passages openings (5), and wherein said baffle plate main body (6) is attached to described partition wall.
15. vacuum cleaners according to claim 13, wherein said vacuum cleaner (2) comprises the filter grid (13) covering described feeding air passages openings (5) in essence, and wherein said baffle plate main body (6) is integrated with described filter grid (13).
CN201380074184.XA 2013-03-04 2013-03-04 It is used to reduce the device of noise in vacuum cleaner Active CN105007792B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2013/054282 WO2014135192A1 (en) 2013-03-04 2013-03-04 Arrangement in a vacuum cleaner for reducing noise

Publications (2)

Publication Number Publication Date
CN105007792A true CN105007792A (en) 2015-10-28
CN105007792B CN105007792B (en) 2017-07-04

Family

ID=47833056

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201380074184.XA Active CN105007792B (en) 2013-03-04 2013-03-04 It is used to reduce the device of noise in vacuum cleaner

Country Status (3)

Country Link
EP (2) EP3682782B1 (en)
CN (1) CN105007792B (en)
WO (1) WO2014135192A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017153277A1 (en) * 2016-03-08 2017-09-14 Arcelik Anonim Sirketi A vacuum cleaner
CN107280577B (en) 2016-03-31 2020-11-03 康塔有限公司 Vacuum cleaner with a vacuum cleaner head
CN109171551A (en) * 2018-08-17 2019-01-11 莱克电气股份有限公司 Air duct assembly of dust collector

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0148523B1 (en) * 1983-12-08 1988-10-26 Shop-Vac Corporation Compact vacuum cleaner
CN1951302A (en) * 2005-10-17 2007-04-25 乐金电子(天津)电器有限公司 Dust collector of vacuum cleaner
CN101999865A (en) * 2009-09-02 2011-04-06 乐金电子(天津)电器有限公司 Filtering system for dust collector
JP2011250973A (en) * 2010-06-02 2011-12-15 Panasonic Corp Vacuum cleaner
CN203942385U (en) * 2014-03-14 2014-11-12 江苏美的春花电器股份有限公司 Motor cover and there is its dust catcher

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10211128A (en) * 1997-01-30 1998-08-11 Sanyo Electric Co Ltd Vacuum cleaner
EP2374394B1 (en) 2010-04-06 2012-07-18 Miele & Cie. KG Vacuum cleaner with a holder grid for a motor protection filter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0148523B1 (en) * 1983-12-08 1988-10-26 Shop-Vac Corporation Compact vacuum cleaner
CN1951302A (en) * 2005-10-17 2007-04-25 乐金电子(天津)电器有限公司 Dust collector of vacuum cleaner
CN101999865A (en) * 2009-09-02 2011-04-06 乐金电子(天津)电器有限公司 Filtering system for dust collector
JP2011250973A (en) * 2010-06-02 2011-12-15 Panasonic Corp Vacuum cleaner
CN203942385U (en) * 2014-03-14 2014-11-12 江苏美的春花电器股份有限公司 Motor cover and there is its dust catcher

Also Published As

Publication number Publication date
EP2964066A1 (en) 2016-01-13
WO2014135192A1 (en) 2014-09-12
CN105007792B (en) 2017-07-04
EP3682782B1 (en) 2023-01-25
EP2964066B1 (en) 2020-02-12
EP3682782A1 (en) 2020-07-22

Similar Documents

Publication Publication Date Title
US9402517B2 (en) Exhaust grille
US20070067948A1 (en) Central vacuum units with an acoustic damping pathway
EP3628202B1 (en) Vacuum cleaner and motor module thereof
CN105007792A (en) Arrangement in a vacuum cleaner for reducing noise
KR20180004793A (en) Construction Machinery
JPWO2014006650A1 (en) Air conditioner indoor unit and air conditioner equipped with the indoor unit
EP2699849B1 (en) Fumes suction and/or filtering hood, in particular for a household kitchen unit
JP5825325B2 (en) Silencer structure of vacuum cleaner
CN210003539U (en) Flow guiding device and bladeless fan
JP2015512492A (en) Intake box with soundproofing characteristics for an air supply device in a compressor assembly
CN111102628A (en) Fume exhaust fan
CN112424004A (en) Heating, ventilating and air conditioning system
CN215109702U (en) A fan subassembly and robot of sweeping floor for sweeping floor robot
CN205065834U (en) Ultra-silent side-draft range hood
CN209822273U (en) Sound wave reflection sound absorption and noise reduction device
CN208431853U (en) A kind of kitchen ventilator with multilayer water conservancy diversion noise filtering device
JP2013088794A (en) Sound suppressing structure
CN110998197B (en) Oil fume collecting device
JP4911179B2 (en) Vacuum cleaner
JP7197934B2 (en) Oil smoke collector
US11035384B2 (en) Silencer for an air blower assembly and air blower assembly having the silencer
CN216744504U (en) Smoke exhaust ventilator
JP2012184916A (en) Range hood
JP3227493B2 (en) Noise and airflow separation type silencer and low noise type equipment using the same
CN102266205A (en) Electric dust collector

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant