EP2934266A1 - Passive vacuum cleaner nozzle with an air intake aperture - Google Patents
Passive vacuum cleaner nozzle with an air intake apertureInfo
- Publication number
- EP2934266A1 EP2934266A1 EP12816054.6A EP12816054A EP2934266A1 EP 2934266 A1 EP2934266 A1 EP 2934266A1 EP 12816054 A EP12816054 A EP 12816054A EP 2934266 A1 EP2934266 A1 EP 2934266A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- air intake
- aperture
- air
- 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
Links
- 239000000428 dust Substances 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 239000000835 fiber Substances 0.000 description 7
- 239000004753 textile Substances 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000010407 vacuum cleaning Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details 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
- A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details 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
- A47L9/02—Nozzles
Definitions
- the present invention generally relates to the field of passive nozzles for vacuum cleaners.
- the present invention relates to passive nozzles with reduced noise level. Background of the invention
- a passive nozzle is a nozzle without any rotary brushes or other means for actively agitating dust from a surface to be cleaned, and active nozzles are nozzles equipped with such means.
- An issue in design of vacuum cleaners is to reduce the noise level generated during operation of the vacuum cleaner. Noise may arise from the fan unit of the vacuum cleaner, but also from airflow in the vacuum cleaner. Such airflow generates noise when it passes the nozzle of the vacuum cleaner.
- the noise generated by the rotary brushes of active nozzles normally constitutes the major portion of the overall noise level of the active nozzle.
- the noise level of passive nozzles is in general lower than the noise level of active nozzles due to the absence of the noise from the rotary brush. It would be desirable to further reduce the noise level of such passive nozzles for vacuum cleaners.
- An object of the present invention is to provide an improved alternative to the above mentioned technique. More specifically, it is an object of the present invention to provide a passive nozzle for a vacuum cleaner with reduced noise level.
- a passive nozzle for a vacuum cleaner comprises a top part, a bottom part, and an airtight chamber having a suction inlet for the purpose of taking in dust from a surface to be cleaned and an outlet for connection to a fan unit of the vacuum cleaner.
- the top part comprises at least one air intake aperture and the bottom part comprises an air outlet aperture. Further, the at least one air intake aperture of the top part is in fluid connection with the air outlet aperture of the bottom part.
- Conventional nozzles normally comprise means, such as brushes, supporting and spacing the bottom part of the nozzle with respect to the surface to be cleaned. In particular, such brushes may be used when cleaning hard surfaces, such as floors.
- brushes are normally not used.
- the brushes may be retracted in the nozzle or a nozzle without brushes may be used.
- the air entrance at the front, rear and lateral edges of the nozzle may be at least partly blocked by the textile fibers of the carpet, e.g. as a consequence of the nozzle sinking down slightly in the carpet.
- the air instead flows towards the suction inlet via the inside of the nozzle and is forced to pass small gaps, recesses and components in the nozzle.
- the air enters the nozzle via narrow gaps not initially intended for taking in air, such as narrow gaps (or slots) between assembled components of the nozzle.
- the present aspect uses the concept of having at least one air intake aperture for providing an additional entrance for the airflow.
- the air intake aperture may not be blocked by the textile fibers of the carpet.
- air is also (or instead) entering the nozzle via the air intake aperture in the top part.
- the air then flows out of the air outlet of the bottom part, which is in fluid communication with the air intake aperture of the top part, and towards the suction inlet of the airtight chamber.
- the airtight chamber which also may be referred to as a duct
- the suction force is improved since air enters the airtight chamber merely via the suction inlet.
- the front and rear edges are the edges of the nozzle facing frontwards and rearwards, respectively, when the nozzle is moved in a natural forward direction (i.e. away from the user) during vacuum cleaning.
- the nozzle may be arranged so as to guide an airflow generated by the fan unit of the vacuum cleaner from the air inlet aperture of the top part and out of the air outlet aperture of the bottom part to the suction inlet of the airtight chamber.
- the fluid connection between the air inlet aperture of the top part and the air outlet aperture of the bottom part may be provided by a space (or passage) extending between the respective apertures in the nozzle.
- the air is guided from the air outlet aperture via the outside of the bottom part to the suction inlet.
- the suction inlet i.e. via under side of the bottom part, it may be forced through the textile fibers of the carpet (or at least forced to pass the surface to be cleaned), whereby dust may be vacuumed form the carpet (or the surface to be cleaned).
- the suction inlet of the airtight chamber may be defined between the portions of the bottom part arranged to be closest to the surface to be cleaned when the nozzle is operated. Hence, the suction inlet may be defined by the lowest portions of the bottom portion.
- the airtight chamber may thus extend from the lowest portion (such as a lower edge) of the bottom portion to the outlet for connection to a fan unit of the vacuum cleaner.
- a major portion of the total air intake area of the at least one air intake aperture may be located in lateral alignment with the suction inlet of the vacuum chamber. By lateral alignment, it is meant that a major portion of the total air intake area of the at least one air intake aperture is located over the suction port (seen from above, i.e.
- the air intake apertures are located closer to the suction inlet, whereby the path for the air to travel is reduced, which further reduces the noise level, as less components (or other interior) of the nozzle must be passed by the air.
- the total air intake area of the at least one air intake aperture is at least 500 mm 2 , such as at least 590 mm 2 .
- An increased intake area facilitates air entrance through the air intake apertures and reduces the amount of air entering the nozzle through narrow gaps between components of the nozzle not initially intended for taking in air, whereby the noise level of the nozzle is reduced.
- the total intake area is the sum of the area of each aperture.
- the air intake area of each one of the at least one air intake aperture is smaller than 6 mm 2 , such as smaller than 5.5 mm 2 .
- Such size of the apertures reduces the risk of foreign matter entering the nozzle via the air inlet apertures. Further, a too large intake area of each air intake aperture may generate more noise at the apertures.
- the present embodiment reduces the noise level of the nozzle.
- the at least one air intake aperture may be substantially circular, which may further reduce the noise level. It will be appreciated that the term "substantially circular" may include any circular-like shape, such as geometrical shapes like a square or a polygon with
- the passive nozzle may further comprise a passive brush being retractable towards the bottom part.
- a passive brush means a non-active brush, not being driven for agitating dust. Having the brush in its projected position is advantageous for operating the nozzle on hard surfaces, such as floors, for reducing the risk of scratching the floor and for sweeping dust from the floor.
- the brush may be retracted for operating the nozzle on soft surfaces, such as carpets, for bringing the suction inlet closer to the carpet, thereby increasing the suction force, and reducing the risk of the brush getting tangled in the textile fibers of the carpet.
- a vacuum cleaner is provided.
- the vacuum cleaner may comprise a passive nozzle as defined in any one of the preceding embodiments.
- Figure 1 shows a passive nozzle according to an embodiment.
- Figure 2 is a cross section of a nozzle body of the nozzle shown in Figure 1 .
- Figure 3 is an enlarged view of an air intake aperture of the nozzle shown in Figure 1 .
- the nozzle 1 may be of floor-type (i.e. adapted to clean floors or the like large cleaning surfaces).
- the nozzle 1 may comprise a nozzle body 15, which preferably may be elongated in a direction perpendicular to the normal (natural) direction of movement of the nozzle 1 during operation of the nozzle 1 .
- the nozzle body 15 is connected to a nozzle outlet 9 via a support structure 6.
- the nozzle outlet 9 is adapted for being connected to the suction hose of a vacuum cleaner (not shown), such that when the vacuum cleaner is in an operative mode, under pressure is created as air is sucked through the nozzle via the hose to the vacuum cleaner.
- the under pressure is generated by a fan unit of the vacuum cleaner.
- the fan unit may comprise a motor driven fan and may also be referred to as a motor/fan unit.
- the nozzle body 15 is pivotally connected with the support structure 6. This connection between the nozzle body 15 and the support structure 6 allows a limited degree of movement such that the nozzle body 15 is allowed to tilt as the nozzle 1 is moved forwards and backwards against the surface being cleaned during vacuuming.
- the nozzle 1 further comprise brushes 4, 5 mounted to the nozzle body 15 and preferably being manually or automatically retractable, such that the brushes 4, 5 can be retracted into the nozzle body 15 when the nozzle 1 is used for vacuuming carpets 10 or other soft surfaces (as illustrated in Figure 2) and projected when the nozzle 1 is used for vacuuming hard surfaces, such as floors (as illustrated in Figure 1 ).
- the brushes 4, 5 are of the passive type, i.e. they are substantially stationary, instead of driven to rotate, during cleaning. Further, the brushes 4, 5 may extend along the long sides of the elongated nozzle body 15, preferably along a front edge 12 and a rear edge 13, respectively, of the nozzle body 15, i.e. substantially perpendicular to the normal direction of movement of the nozzle 1 during operation of the vacuum cleaner.
- the nozzle body 15 comprises a top part 2 and a bottom part 3.
- the top part 2 may be an upper portion (such as an upper half) of the nozzle body 15, for example including (at least an upper portion of) a cover of the nozzle body 15.
- the bottom part 3 may be a lower portion (such as a lower half) of the nozzle body 15.
- the nozzle body 15 further comprises an airtight chamber 7 (shown in Figure 2) having a suction inlet 1 1 (or suction port) for the purpose of taking in dust from the surface to be cleaned, and an outlet (not shown) for fluid connection to the fan unit via the nozzle outlet 9.
- the suction inlet 1 1 is arranged in the bottom part 3, i.e. on the underside of the nozzle body 15 (the side of the nozzle body 15 arranged to face the surface to be cleaned). It is important that the chamber is airtight to avoid leakage of air into the chamber 7, which reduces the suction force. Hence, the only inlet for air to the airtight chamber 7 is at the suction inlet 1 1 .
- the suction inlet 1 1 is defined between the portions 8 of the nozzle body 15 being closest to the surface to be cleaned when the nozzle 1 is supported on the surface, such as during vacuuming. Further, the suction inlet 1 1 may be elongated and extend along the
- the top part 2 comprises one or more air intake apertures 14.
- most of the air intake apertures 14 may be located over the suction inlet 1 1 (seen from above, i.e. from the top part side of the nozzle 1 ). Hence, most of the air intake apertures may be in lateral alignment with the suction inlet 1 1 .
- the shapes of the air inlet apertures may preferably be substantially rounded, such as substantially circular (as shown in the enlarged view of an air intake aperture 14 in Figure 3).
- the air intake area of each one of the air intake apertures 14 may be smaller than 6 mm 2 and preferably smaller than 5.5 mm 2 . It will be appreciated that the different air inlet apertures 14 may have different sizes. Further, the total air intake area of all the air inlet apertures 14 may be at least 500 mm 2 and preferably at least 590 mm 2 .
- the bottom part 3 comprise at least one air outlet aperture 16.
- the bottom part 3 comprises two air outlet apertures 16, one on each side of the suction inlet 1 1 (hence, one along the front edge 12 and one along the rear edge 13 of the nozzle body 15).
- the air outlet apertures 16 may be elongated and extend in the longitudinal direction of the elongated suction inlet 1 1 .
- the air outlet apertures 16 are arranged on the underside of the nozzle body 15 so as to face the surface to be cleaned.
- the air outlet apertures 16 are fluidly connected to the air inlet apertures 14, e.g. via a space (or passage) in the nozzle body 15 (e.g. a space between the cover and the airtight chamber 7).
- an airflow (indicated by arrows in Figure 2) towards the suction inlet 1 1 is generated.
- the nozzle 1 may sink down slightly in the textile fiber of the carpet 10, which causes the gap below the front and rear edges 12, 13 to be at least partly blocked by the textile fibers.
- At least a portion of the airflow enters the nozzle 1 via the air inlet apertures 14 in the top part of the nozzle 1 .
- the airflow is then guided (e.g. via the space between the cover and the airtight chamber 7) towards, and then out of, the air outlet apertures 16 of the bottom part 3 at the underside of the nozzle body 2.
- the airflow then passes the underside of the bottom part 3 through the textile fibers of the carpet 10 towards, and then into, the suction inlet 1 1 .
- dust is brought by the airflow to the suction inlet 1 1 .
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2012/076660 WO2014094876A1 (en) | 2012-12-21 | 2012-12-21 | Passive vacuum cleaner nozzle with an air intake aperture |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2934266A1 true EP2934266A1 (en) | 2015-10-28 |
EP2934266B1 EP2934266B1 (en) | 2020-04-15 |
Family
ID=47561565
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12816054.6A Active EP2934266B1 (en) | 2012-12-21 | 2012-12-21 | Passive vacuum cleaner nozzle with an air intake aperture |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2934266B1 (en) |
CN (1) | CN104703524B (en) |
WO (1) | WO2014094876A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018032616A1 (en) | 2016-08-15 | 2018-02-22 | 美的集团股份有限公司 | Floor brush of dust collector and dust collector having same |
CN106073634B (en) * | 2016-08-15 | 2020-04-03 | 美的集团股份有限公司 | Dust collector floor brush and dust collector with same |
EP3366179B1 (en) * | 2017-02-23 | 2019-07-24 | Wessel-Werk GmbH | Static floor nozzle for a vacuum cleaner |
EP3763271A1 (en) * | 2019-07-08 | 2021-01-13 | Sprintus GmbH | Nozzle for a suction device for cleaning and care of surfaces |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3468396B2 (en) * | 1996-10-04 | 2003-11-17 | 東芝テック株式会社 | Electric vacuum cleaner |
TW475894B (en) * | 1997-12-26 | 2002-02-11 | Tec Corp | Suction port body for vacuum-cleaner and vacuum-cleaner having the same |
US6158082A (en) * | 1998-03-10 | 2000-12-12 | The Toro Company | Portable blower with blower tube noise reduction |
WO2004028327A1 (en) * | 2002-09-25 | 2004-04-08 | Toshiba Tec Kabushiki Kaisha | Electric vacuum cleaner |
KR100592095B1 (en) * | 2004-11-03 | 2006-06-22 | 삼성광주전자 주식회사 | Suction structure assembly of vacuum cleaner |
KR100642075B1 (en) * | 2005-10-21 | 2006-11-10 | 삼성광주전자 주식회사 | A suction nozzle of vacuum cleaner |
AU2010347851B2 (en) * | 2010-03-10 | 2014-02-27 | Lg Electronics Inc. | Suction nozzle for vacuum cleaner |
KR101262701B1 (en) * | 2010-10-22 | 2013-05-08 | 삼성전자주식회사 | Vacuum cleaner having sterilization ability |
-
2012
- 2012-12-21 CN CN201280076261.0A patent/CN104703524B/en active Active
- 2012-12-21 EP EP12816054.6A patent/EP2934266B1/en active Active
- 2012-12-21 WO PCT/EP2012/076660 patent/WO2014094876A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2014094876A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN104703524B (en) | 2017-03-29 |
EP2934266B1 (en) | 2020-04-15 |
WO2014094876A1 (en) | 2014-06-26 |
CN104703524A (en) | 2015-06-10 |
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