EP2633792B1 - Buse de nettoyage de dispositifs - Google Patents

Buse de nettoyage de dispositifs Download PDF

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Publication number
EP2633792B1
EP2633792B1 EP13388002.1A EP13388002A EP2633792B1 EP 2633792 B1 EP2633792 B1 EP 2633792B1 EP 13388002 A EP13388002 A EP 13388002A EP 2633792 B1 EP2633792 B1 EP 2633792B1
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EP
European Patent Office
Prior art keywords
opening
nozzle
neck
suction
housing
Prior art date
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Active
Application number
EP13388002.1A
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German (de)
English (en)
Other versions
EP2633792A2 (fr
EP2633792A3 (fr
Inventor
Juan Amajid
Ken Jarlhelt
Peter Nøhr Larsen
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.)
Nilfisk AS
Original Assignee
Nilfisk AS
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Publication date
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Publication of EP2633792A2 publication Critical patent/EP2633792A2/fr
Publication of EP2633792A3 publication Critical patent/EP2633792A3/fr
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Publication of EP2633792B1 publication Critical patent/EP2633792B1/fr
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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

  • Combined nozzles for both hard surfaces, e.g. parquet floors, tiles or concrete floors, and soft surfaces, e.g. carpets comprise a switching mechanism allowing the user to switch between a sliding element and one or more rows of brushes.
  • An examples of such a nozzle are numerous, e.g. the nozzle for the model Extreme from the applicant.
  • the sliding element in which the suction channel is formed, is placed between two rows of brushes.
  • the height of the housing allows the sliding element and the rows of brushes to be moved in and out of the housing via the switching mechanism.
  • the suction channel of most commercial nozzles extends through the entire width of the nozzle and is connected to the neck at the middle.
  • the neck of nozzles designed for commercial use today has a substantially squared shape, wherein the width of the neck at the suction channel is the same or only a few centimetres wider than the width of the neck at the coupling unit.
  • the suction channel has a height (depth) which is the same or substantially the same at the ends of the nozzle and at the neck, thereby forming a horizontal channel.
  • GB 725395 A Such a structure is disclosed in GB 725395 A , in which the angle between the bottom of the suction channel and the sides of the neck forms a sharp peripheral edge.
  • the object of the invention is to provide a nozzle which has an improved flow with low pressure loss through the nozzle. This is done by having a smooth flow path inside the nozzle without any sharp bends and corners, which are known to cause flow separation (backflow) and turbulence. Abrupt changes the the cross section area of the inside flow path is also avoided. Also the construction of the transitions between the different zones of the nozzle are important. According to the invention the transitions are made smooth with relativily large radius of curvature of 5 mm or more. Special attention is made to the part of the flow duct, where the flow changes direction from being substantially vertical to be substantially horizontal. This flow path creating this transition is limited by walls with a large radius of curverture of at least 30 mm and a total absent of sharp edges.
  • the invention relates to a nozzle for a cleaning device comprising a housing having a suction channel with a first opening facing away from the housing, and a neck having a second opening and a third opening, said second opening being connected to the suction channel, and a coupling unit which is connected to the third opening of the neck, and which may be coupled to a suction pipe or a suction hose.
  • the first opening will be the opening facing the floor and in this respect the plane defined by the first opening will be parallel with the floor, i.e. be substantially horizontal.
  • the neck of the nozzle is configured as a funnel, wherein the second opening has a width equal to or greater than 30% of the width of the first opening.
  • the width of the second opening may be between 30-70% of the width of the first opening.
  • the funnel may comprise two sides which are connected to a bottom of the suction channel and have a radius of curvature equal to or greater than 5 mm, preferably 25- 75 mm, preferably 100 mm.
  • each funnel side is positioned with an angle between 25-55 degrees relative to the to the plane defined by first opening, preferably 30-45 degrees.
  • the nozzle may be manufactured of only a few parts in a simple and inexpensive manner, and that it is more robust than a combined nozzle and has a reduced weight.
  • the shape of the neck and the suction channel reduces the pressure loss and thereby increases the flow velocity near the ends and provides a more uniform distribution of the flow velocity along the width of the nozzle.
  • the shape of the neck and the suction channel further reduces the noise level generated by the nozzle, since the inflow does not pass any sharp peripheral edges around the opening of the neck.
  • a nozzle having a width of 500 mm according to the invention may have the same suction capability as a conventional nozzle having a width of 300 mm.
  • the shape and the angle of the neck and the suction channel may be determined according to the optimal flow path for the incoming fluid or solids, while maintaining a high flow velocity near the ends.
  • the sides 3a, 3b of the neck 3 may be curved instead of being linear, as shown in figure 1 , in order to allow a more optimal flow through the nozzle 1.
  • the invention also provides an embodiment in which the transition, constituted by the neck, between the suction channel and the coupling unit has a radius of curvature of at least 20 mm, preferably at least 25-35 mm.
  • the housing has a first edge and a second edge extending along the width of the housing and having a recess, in which one or more elements arranged to lie against a surface may be placed, and wherein the elements are selected from a group of rows of brushes, felt, sliding elements or rubber lips.
  • the housing may comprise a third edge and fourth edge located at opposite ends of the housing and having a recess, in which a wheel can be rotatably mounted.
  • the elements arranged in the first edge and/or the second edge may be replaced by rotating or removing either the third edge and/or fourth edge or a side plate facing away from the housing.
  • the housing may be shaped as a rectangular housing having four edges which define the edges of the suction channel, as shown in the figures. This provides a housing having a very low height and a length of only a few centimetres, thereby enabling it to reach narrow and difficult areas around and under furniture.
  • the rotating or removable arrangement located at the ends enables the nozzle to be adapted to various types of surfaces, i.e. carpets, hard floors, titles, or the like, by simply replacing the elements located in at least one of the recesses.
  • the invention also provides a cleaning device characterized in that it comprises a nozzle as described above.
  • FIGS 1-4 show an exemplary embodiment of the nozzle according to the invention.
  • the nozzle 1 comprises a housing 2, a neck 3 and a coupling unit 4.
  • the housing 2 may comprise an edge 2a, 2b which extends along the front and back of the housing and may comprise one or more recesses 5, as shown in figures 2-4 .
  • the recesses 5 may be configured to partially receive one or more elements (not shown) arranged to lie against a cleaning surface.
  • the elements may be pivotally mounted inside the recess 5, e.g. via a pivot point located at both ends of the recess 5.
  • the housing may comprise an edge 2c, 2d located at opposite ends of the nozzle 1, as shown in figure 1 , which each may comprise a second recess 6.
  • the second edges 2c, 2d may be lowered relative to the first edges 2a, 2b so that the ends of the nozzle 1 are closed off.
  • the second recess 6 may be configured to partially receive a wheel (not shown) which enables the nozzle to be moved more easily over the surface.
  • the wheel may be mounted on a shaft (not shown) in the second recess 6 so that the nozzle 1 is kept a few millimetres above the surface.
  • At least one of the edges 2c, 2d may be rotatably mounted on the side of the housing 2 or may be removed from the side.
  • the edge 2c, 2d may comprise a side plate which faces away from the nozzle 1 and which may be removed or rotated. This provides access to at least one of the first recesses 2a, 2b so that the elements arranged in the recess/recesses may be replaced and optionally also the wheel located in the edges 2c, 3d.
  • the housing 2 may be configured to form a suction channel 7 inside the housing 2.
  • the suction channel 7 may be defined by the edges 2a-d of the housing 2.
  • the suction channel 7 comprises an opening 7a facing away from the nozzle, and an opening 7b (marked by dotted lines) facing the neck 3.
  • the cross-sectional shape of the suction channel 7 may be semicircular or square, as shown in figures 3-4 .
  • the depth of the suction channel 7 may decrease from the neck 3, i.e. the edge of the opening 7b, towards the end of the nozzle 1, e.g. the edge 2c, 2d of the housing 2, as shown in figures 1 , 3 and 4 .
  • the bottom of the suction channel 7 may be angled relative to the opening 7a so that the depth gradually or continuously decreases towards the ends 2c, 2d of the nozzle 1, thereby forming a wedge-shaped suction channel.
  • the bottom may be linear and may be placed at an angle ⁇ between 2-10 degrees, preferably 5 degrees, as shown in figure 5a .
  • the bottom may be curved, e.g. forming a C-shaped or S-shaped curve having at least one predetermined radius of curvature. This shape reduces the risk of having flow separation in the suction channel, thereby decreasing the pressure loss and thus increasing the flow velocity near the ends of the nozzle.
  • the neck 3 is connected to the opening 7b of the suction channel 7, as shown in figures 1 and 2 .
  • the neck 3 is connected to the coupling unit 4.
  • the neck 3 may be shaped as a funnel, e.g. a rectangular shaped funnel, having a small opening at one end and a large opening at the other end.
  • the small opening may be a circular opening which may be connected to the coupling unit 4, as shown in figure 2 .
  • the large opening may be formed by the opening 7b which may be shaped as a rectangular or substantially rectangular opening, as shown in figures 1-2 .
  • the neck 3 has two or more internal sides 3a, 3b connected to the bottom of the suction channel 7.
  • FIGS 5a-b show a simplified cross-section of the embodiment shown in figures 1-2 .
  • the width A of the opening 7b may be equal to or smaller than the internal diameter B of the small opening connected to the coupling unit 4, as shown in figures 2 and 5b .
  • the width C of the opening 7b may be equal to or greater than 30%, preferably between 30-70%, of the width D of the opening 7a.
  • the sides 3a, 3b of the neck 3 may be linear or curved, e.g. having a radius of curvature equal or greater than 100mm.
  • the shape of the neck 3 reduces the risk of having flow separation around the peripheral edges of the opening 7b, thus reducing pressure loss and thereby increasing the flow velocity at the ends of the nozzle 1. This provides a more uniform distribution of the flow velocity along the width of the nozzle 1.
  • the nozzle 1 as described above with a suction capability of 30 L / s increases the flow velocity through the suction pipe to about 46.7 m / s and increases the flow velocity near the ends of the suction channel to about 51.4 m / s .
  • the shape of the neck 3 may be curved so that the coupling unit 4 may be positioned at an angle ⁇ perpendicular to the length of the housing 2, as shown in figures 2 and 5b , e.g. in an angle ⁇ between 45-90 degrees.
  • the coupling unit 4 may be positioned at a predetermined height E and length F from the opening 7a. The position of the coupling unit 4 may be determined so that the inflow has an optimum flow path through the neck 3 with a minimal energy loss.
  • the height E may be 40 mm and the length F may be 30 mm. This enables the nozzle 1 to reach difficult areas under articles of furniture.
  • the coupling unit 4 may be configured to be coupled to a suction pipe or a suction hose, as shown in figures 2-4 .
  • Figure 5b shows a construction, where the dimension B is larger than A. However, from a manufacturing point of view it may be desired to have essentially the same dimensions for A and B.
  • the coupling unit 4 may comprise a pivoting/rotating joint (not shown), enabling the suction pipe or hose to pivot/rotate relative to the nozzle 1, while maintaining the nozzle 1 close to the surface.
  • the pivoting/rotating joint may be placed between the coupling unit 4 and the neck 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)

Claims (12)

  1. Buse (1) pour un dispositif de nettoyage comprenant :
    - un boîtier (2) ayant un canal d'aspiration (7) avec une première ouverture (7a) orientée à l'opposé du boîtier,
    - un col (3) ayant une deuxième ouverture (7b) et une troisième ouverture, ladite deuxième ouverture étant raccordée au canal d'aspiration, et
    - une unité de couplage (4) qui est raccordée à la troisième ouverture du col, et qui peut être couplée à un tuyau d'aspiration ou un flexible d'aspiration,
    dans laquelle le canal d'aspiration (7) comprend un fond, dans laquelle la profondeur du canal d'aspiration diminue progressivement ou en continu depuis le col (3) vers des extrémités de la buse (1), moyennant quoi les parties du canal d'aspiration (7) entre le col (3) et les extrémités de la buse forment des canaux d'aspiration de forme biseautée, dans lesquels le fond est positionné selon un angle (α) entre 2 à 12 degrés par rapport au plan défini par la première ouverture (7a) ;
    caractérisée en ce que le col (3) est conçu comme un entonnoir, dans laquelle la deuxième ouverture (7b) a une largeur (C) égale ou supérieure à 30 % de la largeur (D) de la première ouverture (7a) ;
    dans laquelle l'entonnoir comprend deux côtés (3a, 3b) qui sont raccordés à un fond du canal d'aspiration et où la transition entre un côté d'entonnoir (3a, 3b) et un fond du canal d'aspiration a un rayon de courbure égal ou supérieur à 50 à 100 mm.
  2. Buse selon la revendication 1, dans laquelle le col (3) est conçu comme un entonnoir ayant une petite ouverture à une extrémité et une grande ouverture à l'autre extrémité.
  3. Buse selon la revendication 2, dans laquelle la petite ouverture est raccordée à l'unité de couplage (4), et la grande ouverture est formée par la deuxième ouverture (7b).
  4. Buse selon l'une quelconque des revendications 1 à 3, dans laquelle la largeur (C) de la deuxième ouverture (7b) est entre 30 à 70 % de la largeur (D) de la première ouverture (7a).
  5. Buse selon l'une quelconque des revendications 1 à 4 précédentes, dans laquelle chaque côté d'entonnoir (3a, 3b) est positionné avec un angle entre 25 à 55 degrés par rapport au plan défini par la première ouverture (7a).
  6. Buse selon l'une quelconque des revendications 1 à 5 précédentes, dans laquelle la transition constituée par le col (3) entre le canal d'aspiration (7) et l'unité de couplage (4) a un rayon de courbure d'au moins 20 mm.
  7. Buse selon l'une quelconque des revendications 1 à 6 précédentes, dans laquelle le fond est positionné selon un angle (α) entre 2 à 10 degrés par rapport au plan défini par la première ouverture (7a).
  8. Buse selon l'une quelconque des revendications 1 à 7 précédentes, dans laquelle le boîtier (2) a des premier et deuxième bords (2a, 2b) s'étendant le long de la largeur du boîtier et ayant un évidement, dans lequel un ou plusieurs éléments agencés pour être disposés contre une surface peuvent être placés, et dans laquelle les éléments sont choisis dans un groupe de brosses, d'éléments coulissants ou de lèvres en caoutchouc.
  9. Buse selon la revendication 8, dans laquelle le boîtier (2) comprend des troisième et quatrième bords (2c, 2d) situés à des extrémités opposées du boîtier (2) et ayant un évidement, dans laquelle une roue peut être montée sur un arbre.
  10. Buse selon la revendication 9, dans laquelle les éléments agencés dans le premier bord et/ou le deuxième bord (2a, 2b) peuvent être remplacés par rotation ou retrait soit du troisième bord et/ou quatrième bord (2c, 2d) soit d'une plaque latérale orientée à l'opposé du boîtier (2).
  11. Buse selon l'une quelconque des revendications 1 à 10 précédentes, dans laquelle l'unité de couplage (4) comprend des moyens de couplage, qui peuvent être couplés au flexible d'aspiration ou tuyau d'aspiration situé à l'extrémité libre de l'unité de couplage (4) et éventuellement à un joint rotatif/pivotant raccordé au col (3).
  12. Dispositif de nettoyage comprenant une unité de nettoyage ayant un système de filtration raccordé à un module d'aspiration, qui est agencé pour aspirer de la saleté, des particules, des matières solides ou des fluides à partir d'une surface, et un flexible ou tuyau d'aspiration qui peut être raccordé à l'unité de nettoyage et/ou une buse, caractérisé en ce que la buse est une buse (1) telle que décrite dans l'une quelconque des revendications 1 à 11 précédentes.
EP13388002.1A 2012-02-29 2013-02-27 Buse de nettoyage de dispositifs Active EP2633792B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DKPA201200163 2012-02-29

Publications (3)

Publication Number Publication Date
EP2633792A2 EP2633792A2 (fr) 2013-09-04
EP2633792A3 EP2633792A3 (fr) 2015-11-11
EP2633792B1 true EP2633792B1 (fr) 2020-05-13

Family

ID=47900988

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13388002.1A Active EP2633792B1 (fr) 2012-02-29 2013-02-27 Buse de nettoyage de dispositifs

Country Status (1)

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EP (1) EP2633792B1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL48723C (fr) * 1937-09-02
GB707366A (en) * 1952-02-09 1954-04-14 Kooperativa Forbundet Forening Improvements in suction cleaner nozzles
GB725395A (en) 1953-06-11 1955-03-02 Lewyt Corp Improvements in vacuum cleaner nozzles
SE390251B (sv) * 1975-03-26 1976-12-13 Electrolux Ab Dammsugarmunstycke
US4747179A (en) * 1987-05-29 1988-05-31 Shop-Vac Corporation Nozzle with improved coupling for a vacuum device
DE4413223A1 (de) * 1994-04-15 1995-10-19 Vorwerk Co Interholding Strömungskanalabschnitt für insbesondere einen Staubsauger

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
EP2633792A2 (fr) 2013-09-04
EP2633792A3 (fr) 2015-11-11

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