US20160324382A1 - Vacuum cleaner nozzle - Google Patents

Vacuum cleaner nozzle Download PDF

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Publication number
US20160324382A1
US20160324382A1 US14/237,419 US201314237419A US2016324382A1 US 20160324382 A1 US20160324382 A1 US 20160324382A1 US 201314237419 A US201314237419 A US 201314237419A US 2016324382 A1 US2016324382 A1 US 2016324382A1
Authority
US
United States
Prior art keywords
wheel
nozzle
axis
suction
suction pipe
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.)
Abandoned
Application number
US14/237,419
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English (en)
Inventor
Paulus Hermanus Van Wolferen
Jeroen Herrewijnen
Bastian Cornelis Kleine-Doepke
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips NV
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
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Application filed by Koninklijke Philips NV filed Critical Koninklijke Philips NV
Assigned to KONINKLIJKE PHILIPS N.V. reassignment KONINKLIJKE PHILIPS N.V. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HERREWIJNEN, JEROEN, Kleine-Doepke, Bastian Cornelis, VAN WOLFEREN, PAULUS HERMANUS
Publication of US20160324382A1 publication Critical patent/US20160324382A1/en
Abandoned legal-status Critical Current

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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
    • A47L9/02—Nozzles

Definitions

  • the present invention relates to a nozzle for a vacuum cleaner and to a vacuum cleaner having such a nozzle.
  • a good vacuum cleaner nozzle must have high cleaning performance, i.e. effective debris pick up, but at the same time be easy to handle and move across a surface to be cleaned, such as a carpet.
  • high cleaning performance is obtained only at the expense of an increased resistance to motion across a surface and so requires an increased application of force by the user to move the nozzle.
  • the nozzle may have unpleasant dynamic behaviour in the sense that it does not move particularly well across a surface when it is pushed and/or pulled.
  • This invention describes a nozzle that seeks to overcome or substantially alleviate the problems referred to above and to provide a nozzle for a vacuum cleaner that combines optimum cleaning performance with minimal motion resistance and more desirable dynamic behaviour.
  • a nozzle for a vacuum cleaner comprising a soleplate with a suction channel slot therein for the suction of debris from a surface, a wheel mounted for rotation about an axis to support the nozzle on said surface, and a suction pipe connector for rotation about an axis that is coaxial with said wheel axis, wherein the wheel has a radius (h) of at least 25 mm and a distance (X) across the surface between a point of contact of the wheel with the surface that is directly beneath the wheel axis and a point midway between the leading and trailing edges of the suction channel slot is no greater than 80 mm.
  • the nozzle comprises a housing in which the soleplate and suction channel slot are formed and the wheel and suction pipe connector may be mounted to the housing for rotation about said wheel axis.
  • the nozzle may comprise a housing in which the soleplate and suction channel slot are formed, the wheel and suction pipe connector being mounted for rotation relative to each other about the wheel axis and the housing being mounted for rotation relative to the wheel and the suction pipe connector about a second axis parallel to and spaced from the first axis.
  • a link arm extends between said wheel axis and the second axis and is pivotally connected to each of the suction pipe connector and the housing.
  • the ratio of the radius of the wheel (h) to the sum of the distance X across the surface between a point of contact of the wheel with the surface that is directly beneath the wheel axis and a point midway between the leading and trailing edges of the suction channel slot and a distance (1 ⁇ 2 C) across the surface between the point midway between the leading and trailing edges of the suction channel slot and the leading edge of the suction channel slot is greater than 0.3.
  • a vacuum cleaner including a suction pipe and a nozzle according to the invention, the suction pipe being connected to the nozzle via the suction pipe connector.
  • FIG. 1 illustrates a side cross-sectional elevation of a conventional vacuum cleaner nozzle
  • FIG. 2 illustrates the same side cross-sectional elevation as shown in FIG. 1 but annotated to show torque T and movement of the wheel caused by wheel lift;
  • FIG. 3 illustrates a side cross-sectional elevation of a vacuum cleaner nozzle according to the present invention
  • FIG. 4 illustrates a side cross-sectional elevation of a nozzle according to another embodiment of the invention in which the nozzle has a housing that is mounted for rotation about an axis that is spaced from the axis of rotation of the wheel axis;
  • FIG. 5 is a table to illustrate the performance of a nozzle having a ratio of greater than 0.3 compared to the performance of some conventional nozzles.
  • FIGS. 1 and 2 A cross-sectional side elevation of a nozzle 1 for a vacuum cleaner (not shown) is illustrated in FIGS. 1 and 2 .
  • the nozzle 1 comprises a main body or housing 2 having an elbow or suction pipe connector 3 attached to a rear end of the housing 2 for rotation relative to the housing 2 about an axis A.
  • a suction pipe 4 which does not form part of the nozzle 1 , is attachable to and extends upwardly from the suction pipe connector 3 .
  • the suction pipe 4 provides a conduit for the passage of dust and debris that has been sucked from a surface ‘S’ having been vacuumed through the nozzle 1 .
  • the suction pipe 4 also acts as a handle to enable a user to push the nozzle in a forward (‘F’) direction and pull it in a rearward (‘R’) direction during use.
  • the wheel 5 is mounted to the housing 2 . It is also mounted to the suction pipe connector 3 for rotation about the same axis ‘A’ as the suction pipe connector 3 to support and guide the nozzle 1 across the surface ‘S’.
  • the underside of the housing 2 is provided with a soleplate 6 which contacts the surface ‘S’ being vacuumed.
  • An elongate suction channel slot 7 is formed in the soleplate 6 and extends across the width of the housing 2 substantially at right angles to the forward ‘F’ and rearward ‘R’ directions of movement.
  • the elongate suction channel slot 7 has parallel leading and trailing edges 7 a , 7 b that define the edges of the slot 7 in the soleplate 6 . It will also be appreciated that the slot 7 may have a different shape.
  • Thread or debris pick-up strips 8 may be provided forwardly of the leading edge 7 a and/or rearwardly of the trailing edge 7 b to assist in releasing hair or threads from a surface S being vacuumed.
  • the suction channel slot 7 In contact with the surface S, i.e. the leading and trailing edges 7 a , 7 b should remain in contact with the surface S. Therefore, the position of the suction slot 7 , the wheel axis A and the direction in which force is applied to the housing 2 via the suction pipe 4 and suction pipe connector 3 are all important factors, as they determine the behavior and the forces acting on the nozzle 1 .
  • the main phenomenon behind dust pickup from a surface S such as a carpet is the opening of the pile.
  • a vertical force has to be applied on the leading edge 7 a of the suction slot 7 .
  • the only force that is generated in this direction apart from the force generated as a result of the weight of the nozzle 1 itself, is a horizontal friction force that is applied by the user via the suction pipe 4 to push the nozzle 1 across the carpet S.
  • distance h is important.
  • Distance h is the distance from the axis of rotation A of the wheel 5 to the surface S and is equivalent to the radius of the wheel 5 . As distance h increases, the higher the downward vertical force V of the suction edge against the pile will be as the vacuum cleaner is pushed in a forward direction F along the surface by a user who applies a force to the nozzle via the suction pipe 4 in a direction that extends along line P.
  • distance q represents the length of a line that extends from the leading edge 7 a of the suction slot 7 and intersects at right-angles with the line P along which the force is applied to the nozzle 1 which is generated by a user as a result of pulling the suction pipe 4 across the carpet S.
  • this tilting action is undesirable because the trailing edge 7 a of the suction slot 7 is no longer in contact with the carpet S and so air will start seeping in through a bypass path, rather than through the carpet and so this is undesirable, and results in a reduction in suction performance.
  • the tilting action also causes unpleasant bouncing, irregular movements of the nozzle 1 .
  • the distance h needs to be selected so as to maintain a vertical force V which will maintain the suction slot 7 against the pile when the nozzle is pushed in a forward direction (F).
  • the inventors have determined that to balance the requirement of preventing loss of suction when the nozzle is pushed in the forward direction (F), and the requirement to minimise or alleviate bouncing and irregular movement of the nozzle 1 (by maintaining a low distance q and to keep the aforementioned torque T at a minimum) when the nozzle is pulled in a rearward direction (R), a certain combination of wheel diameter and the distance of the wheel to the centre of the suction channel is important.
  • the dimension q should be smaller than 24 mm to provide the best possible performance of the nozzle 1 when it is being pulled in a rearward direction (R).
  • the distance q is related to the distance of the wheel axle A above the surface S (i.e. dimension h referred to above, which is equivalent to the radius of the wheel 5 ), and the dimension X (see FIG. 3 ), which is the distance across the surface S between the point of contact Y of the wheel 5 with the surface S directly below the axis A, and a centre line M (see FIG. 3 ) midway between the leading and trailing edges 7 a , 7 b of the suction channel slot 7 , i.e. an imaginary centre line that is parallel to and equidistant from both the leading and the trailing edges 7 a , 7 b of the suction channel slot 7 .
  • the centre line is positioned at 1 ⁇ 2C from the leading and trailing edges 7 a , 7 b .
  • the inventors have found that by increasing the diameter of the wheel 5 and by positioning the wheel axle A closer to the suction slot 7 to reduce the distance X, the smaller q will become, thereby reducing the torque T and making it easier to pull the nozzle across the surface in the direction (R).
  • the suction channel slot 7 is ideally rectangular in shape and extends across the width of the nozzle in a direction at right angles to the forward and backward direction of movement of the nozzle F and R, and parallel to the wheel axis.
  • the suction channel slot may be shaped or extend at an angle in some way, in which case the measurement X referred to above should be taken from at a central point, midway between each end of the slot in a direction across the width of the nozzle 1 .
  • this formula is derived assuming the suction slot width as 20 mm.
  • the slot width is in the region of 18 to 21 mm.
  • the ratio is less than 0.3, the force required to push the nozzle in a forward direction (F) is smaller, as would be the vertical force V acting on the leading edge of the nozzle. Consequently, the dust pickup efficiency would reduce.
  • a ratio of less than 0.3 also results in a larger value for q and so the torque required to cause the nozzle to tilt increases when the nozzle is being pulled in a rearward direction (R).
  • the specified parameters are chosen so as to provide a ratio of greater than 0.3, the vertical force V on the leading edge of the nozzle for a given force applied by a user to push the nozzle forward is higher than whenever parameters are chosen which are smaller then the specified ratio.
  • q will be less resulting in less torque on the nozzle for the same friction force than whenever a setting is chosen outside the specified ratio.
  • a nozzle for a vacuum cleaner comprising a housing having a soleplate with a suction channel slot therein for the suction of debris from a surface, a wheel mounted to the housing for rotation about an axis that extends substantially parallel to leading and trailing edges of said suction channel slot to support the nozzle on said surface, and a suction pipe connector mounted to the housing for rotation about an axis that is coaxial with said wheel axis.
  • the ratio of the radius (h) of the wheel to a distance across a surface, between a point of contact (Y) of the wheel with the surface that is directly beneath the wheel axis and a point midway between the leading and trailing edges of the suction channel slot is greater than 0.3.
  • the parameters are selected so as to provide a ratio of greater than 0.3, when the width of the suction slot preferably lies in the range of 18 to 21 mm.
  • FIG. 4 The embodiment shown in FIG. 4 is the same as that shown in FIG. 3 , except that the wheel 5 is pivotally mounted to the suction pipe connector 3 and the housing 2 is pivotally mounted to the suction pipe connector 3 for rotation about a second axis B which is spaced from the wheel axis A.
  • a link arm 10 extends between the axes A and B and connects the housing 2 to the suction pipe connector 3 .
  • the housing 2 can pivot about axis B independently to movement of the suction pipe connector 3 and the wheel 5 about axis A and so the housing 2 can assume a different angle during the forward and backward strokes.
  • FIG. 5 is a table that provides a number of ratios obtained from the equation identified above with different vacuum cleaner nozzles having differing values for distance X, wheel radius h and slot width C. It also demonstrates how dust pick up efficiency and motion resistance is optimised when the calculated ratio is greater than 0.3.
  • Nozzle 1 represents the nozzle according to the invention, whereas nozzles 2 , 3 and 4 represent those of the prior art.
  • this table represents values obtained from a nozzle 1 having a double hinge arrangement, as described with reference to FIG. 4 , similar advantages are obtained with the nozzle described with reference to FIG. 3 in which there is only one pivot point.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)
US14/237,419 2013-02-04 2013-11-22 Vacuum cleaner nozzle Abandoned US20160324382A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP13153781 2013-02-04
EP13153781.3 2013-02-04
PCT/EP2013/074521 WO2014117885A1 (fr) 2013-02-04 2013-11-22 Buse d'aspirateur

Publications (1)

Publication Number Publication Date
US20160324382A1 true US20160324382A1 (en) 2016-11-10

Family

ID=47709933

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/237,419 Abandoned US20160324382A1 (en) 2013-02-04 2013-11-22 Vacuum cleaner nozzle

Country Status (7)

Country Link
US (1) US20160324382A1 (fr)
EP (1) EP2773252B1 (fr)
JP (1) JP5752863B2 (fr)
CN (2) CN203914782U (fr)
DE (1) DE202014100473U1 (fr)
RU (1) RU2014104495A (fr)
WO (1) WO2014117885A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10292555B2 (en) 2014-12-02 2019-05-21 Dyson Technology Limited Floor tool for a vacuum cleaner

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022103372A1 (de) 2022-02-14 2023-08-17 Wessel-Werk Gmbh Staubsaugerdüse

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS551440U (fr) * 1978-06-19 1980-01-08
JPS55107853U (fr) * 1979-01-22 1980-07-28
JPS55107854U (fr) * 1979-01-22 1980-07-28
JPS5843351U (ja) * 1981-09-18 1983-03-23 株式会社日立製作所 電気掃除機の床用吸口
JPS6129322A (ja) * 1985-03-12 1986-02-10 株式会社日立製作所 電気掃除機の床用吸口
DE4304681C2 (de) * 1993-02-16 1996-06-05 Wessel Werk Gmbh Einteilige Staubsaugerdüse
US20080222839A1 (en) * 2005-09-14 2008-09-18 Koninklijke Philips Electronics N.V. Suction Nozzle and Vacuum Cleaner Provided with Such a Suction Nozzle
DE102006031486A1 (de) * 2006-07-07 2008-01-10 Wessel-Werk Gmbh Düse für Bodenstaubsauger
GB2444898A (en) * 2006-12-22 2008-06-25 Dyson Technology Ltd A vacuum cleaner nozzle
GB2486666B (en) * 2010-12-22 2012-11-07 Grey Technology Ltd Vacuum cleaner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10292555B2 (en) 2014-12-02 2019-05-21 Dyson Technology Limited Floor tool for a vacuum cleaner

Also Published As

Publication number Publication date
EP2773252A1 (fr) 2014-09-10
CN203914782U (zh) 2014-11-05
DE202014100473U1 (de) 2014-02-27
WO2014117885A1 (fr) 2014-08-07
EP2773252B1 (fr) 2014-11-05
JP2015511850A (ja) 2015-04-23
RU2014104495A (ru) 2015-08-20
CN103961024A (zh) 2014-08-06
JP5752863B2 (ja) 2015-07-22

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Legal Events

Date Code Title Description
AS Assignment

Owner name: KONINKLIJKE PHILIPS N.V., NETHERLANDS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:VAN WOLFEREN, PAULUS HERMANUS;HERREWIJNEN, JEROEN;KLEINE-DOEPKE, BASTIAN CORNELIS;REEL/FRAME:032158/0442

Effective date: 20131126

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE