EP2242413B1 - Klarspül- und/oder reinigungsvorrichtung mit geringem wasserverbrauch und geschirrspülmaschine mit einer solchen vorrichtung - Google Patents

Klarspül- und/oder reinigungsvorrichtung mit geringem wasserverbrauch und geschirrspülmaschine mit einer solchen vorrichtung Download PDF

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Publication number
EP2242413B1
EP2242413B1 EP08859247.2A EP08859247A EP2242413B1 EP 2242413 B1 EP2242413 B1 EP 2242413B1 EP 08859247 A EP08859247 A EP 08859247A EP 2242413 B1 EP2242413 B1 EP 2242413B1
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EP
European Patent Office
Prior art keywords
arm
nozzles
axis
towards
rotation axis
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.)
Not-in-force
Application number
EP08859247.2A
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English (en)
French (fr)
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EP2242413A1 (de
Inventor
Alessio Chericoni
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.)
Premark FEG LLC
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Premark FEG LLC
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Publication date
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Publication of EP2242413A1 publication Critical patent/EP2242413A1/de
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Not-in-force 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
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
    • A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
    • A47L15/22—Rotary spraying devices
    • A47L15/23—Rotary spraying devices moved by means of the sprays

Definitions

  • the present invention relates to a rinsing and/or possibly washing device for an electric household appliance, specifically for a dishwashing machine of the professional type, capable of drastically reducing the consumption of water.
  • the invention further relates to the electric household appliance equipped with such a device.
  • washing/rinsing device for dishwashing machines including a rotating arm (also named “lance” in technical language) provided with spray nozzles and epicyclic movement in order to carry out an improved distribution of washing/rinsing fluid inside the washing chamber of the dishwashing machine, usually accessible through a pivoting front door.
  • the known device in addition to being costly and complex to be implemented, has large dimensions and does not always solve the problem of drastically reducing the amount of water needed by the machine to particularly perform the rinsing cycle.
  • Other washing/rinsing devices for dishwashing machines are known for example from US 5964232 A and FR2350084 A . It has been experimentally found that a great amount of water, both in the washing cycle and in the rinsing cycle, is sprayed around the basket and not onto it, therefore wetting the bottom and the walls of the washing chamber.
  • a rinsing (and possibly washing) device for an electric household appliance, in particular a dishwashing machine is thus provided as defined in claim 1.
  • the invention further relates to an electric household appliance, as defined in claim 9.
  • the device comprises at least one arm rotationally mounted about a generally vertical axis within a washing chamber of the electric household appliance, immediately over a container basket for the dishes to be washed.
  • the arm delimits a cavity therein, which cavity is connected in use to dispensing means of a pressurized service fluid, e.g. rinsing water, of the electric household appliance and is provided, on a first surface thereof oriented in use towards the dishes, with a plurality of spray nozzles, reciprocally spaced lengthwise along the arm and communicating with the internal cavity of the latter, so as to determine in use the exiting of the service fluid from the arm in the form of jets directed towards the dishes.
  • a pressurized service fluid e.g. rinsing water
  • the arm is shaped so that its opposite ends, which radially and overhangingly extend from the rotation axis, in a diametrically opposite manner with respect to the rotation axis itself, according to a generally known configuration, are provided with at least first nozzles radially arranged more externally along the arm and oriented at an angle, on the side of the first face of the arm, towards the rotation axis, so as to be adapted to eject in use, towards the dishes, corresponding operative fluid jets oriented obliquely to the dishes and converging towards the rotation axis, so that the surface wetted (i.e. "covered") in use by the nozzles of the arm is delimited within a circle covered in use, about the rotation axis, by the opposite overhanging ends of the arm.
  • the rotation axis of the arm is further positioned at the middle line of the arm itself, the latter having a mounting portion for securing it to the rotation axis indeed arranged substantially on the middle line of the arm itself, so that opposite longitudinal portions of the arm, delimited at their lower part by the first surface and, on the latter, provided with said nozzles, ending with the aforesaid opposite ends, protrude in use in a substantially symmetric manner from the mounting portion in a radial direction with respect to the rotation axis.
  • all the nozzles of the arm are substantially identical to one another and are oriented substantially coplanar with the first surface of the arm, the required inclination of the orientation of the first nozzles being obtained because the opposite ends of the arm are shaped so as to be bent by a desired angle towards the rotation axis (A) on the side of said first surface, e.g. because they consist of the ends of an originally rectilinear arm which have been bent by plastic deformation, to form an angle or a curve and without obstructing said internal cavity of the arm, towards the rotation axis, on the part of said first surface of the arm.
  • the required orientation is thus obtained without additional costs, as compared to a traditional arm or lance, because a simple bending operation which may be performed either automatically or manually, for example by means of appropriate templates, is additionally required.
  • the rotating arm or lance carries second nozzles, different from the first ones, the second nozzles being all radially arranged along the arm, more internally as compared to the first nozzles and being shaped so as to be adapted to deliver jets substantially directed perpendicularly to the first surface, instead of obliquely to the same, as the jets delivered by the first nozzles.
  • the first nozzles are further shaped so as to eject in use a conical or a flared blade-shaped jet having a smaller opening angle than that of the corresponding jets, also conical or flared blade-shaped, ejected in use by the second nozzles.
  • numeral 1 indicates as a whole a rinsing (and/or washing) device for an electric household appliance 2, in particular a dishwashing machine for professional use, of the front loading type in the example shown.
  • the dishwashing machine 2 comprises a washing chamber 3 accommodating at least one container basket 4 (known) for the dishes 5 to be washed, the washing device 1 and delivering means 7 of a pressurized service fluid 80, e.g. rinsing water, towards the device 1, in this case towards an outlet 10 arranged in the washing chamber 3 with a symmetry axis A thereof arranged substantially vertical and connected to the rinsing device 1 in the manner disclosed below.
  • a pressurized service fluid 80 e.g. rinsing water
  • the dispensing means 7 of the pressurized water are known and comprise, in this case, a pump 11, a tank 12 in which the water delivered onto the dishes 5 through the outlet 10 and the device 1 is collected in use, and network-water feeding means 13, the pump 11 being able to use both the network-water (during the rinsing cycle) and, possibly, the water in the tank 12 (during the washing cycle).
  • the device 1 comprises at least one arm 20 rotationally mounted about the axis A, which is generally vertical, within the washing chamber 3 of the electric household appliance 2 immediately over the container basket 4, in this case idly and fluid-tightly mounted, in a known manner and therefore not described in detail for simplicity, to the outlet 10 with a central assembly portion 21 thereof.
  • the arm 20 delimits a cavity 22 therein ( figure 3 ) connected in use to the water dispensing means 7 through the outlet 10 and is integrally provided with a plurality of spray nozzles 23, each adapted to generate a corresponding jet 8.
  • the nozzles 23 are obtained on a first surface 24 of the arm 20, in this illustrated case the lower surface, which may be either flat, in the case of flat, "biscuit"-shaped, or paddle-shaped arms 20, or curved, in the case of tubular arms 20 having a circular or elliptical section.
  • the surface 24 is oriented in use towards the dishes 5 and the nozzles 23, which are carried by the same, may be arranged substantially coplanar or flushed with the surface 24, and are arranged reciprocally spaced lengthwise along the arm 20 and communicating with the internal cavity 22 of the latter.
  • Opposite ends 25,26 of the arm 20 extend radially and overhangingly, on opposite sides, from the rotation axis A, which is placed at the middle line of the arm 20, the latter having the assembly portion 21 for securing it to the rotation axis A substantially arranged indeed on the middle line of the arm 20 itself, so that opposite longitudinal portions 27,28 of the arm 20, delimited at their lower part by the surface 24 and which are provided, on the latter, with the nozzles 23, end with the opposite ends 25,26 and protrude in use in a substantially symmetric manner from the assembly portion 21 in a radial direction with respect to the rotation axis A.
  • At least first nozzles 23b radially and more externally arranged along the arm 20 as compared to the other nozzles 23, are oriented inclined, on the side of the face 24, towards the rotation axis A, so as to be adapted to eject in use, towards the dishes, corresponding jets 8b of operative fluid 80 (rinsing water) oriented obliquely to the dishes 5 and converging towards the rotation axis A, so that the surface wetted in use by the nozzles 23, 23b of the arm 20 is delimited within a circle C ( figure 3 ) covered in use about the rotation axis A by the opposite overhanging ends 25,26 of the arm 20.
  • the aforesaid first nozzles 23b are exactly arranged at the opposite ends 25,26 of the arm 20, so as to be integrally carried by the same, and all the nozzles 23, thus including the nozzles 23b, are oriented substantially coplanar with the surface 24 of the arm 20 and in the most simple embodiment (known and not shown) may consist of simple holes or slots made through the side wall portion of the arm 20 defining the lower surface 24.
  • the opposite ends 25,26 of the arm 20 are shaped so as to be folded by a desired angle a ( figure 2 ) towards the rotation axis A on the side of the surface 24, i.e. downwards and towards the basket 4 underneath.
  • the opposite ends 25,26 of the arm 20 consist of originally rectilinear ends of an originally rectilinear arm which have been bent by plastic deformation, to form an angle or a curve and without obstructing the internal cavity 22 of the arm 20, towards the rotation axis A on the side of surface 24.
  • the arm 20 is substantially rectilinear even at the ends 25,26 and these are provided on the surface 24 with nozzles 23d made with a symmetry axis D thereof, along which there are adapted to eject a jet 8b of operative fluid 80, oriented, with respect to the surface 24, inclined in a direction and at an angle such that the axis D is converging towards the rotation axis A.
  • the arm 20 carries the nozzles 23b or 23d obliquely oriented to the surface 24 and the other nozzles 23, oriented instead in a substantially perpendicular manner to the surface 24 and which are arranged for differentiating themselves from the nozzles 23b,23, placed so that all the nozzles 23 different from the nozzles 23b,23d are arranged along the arm 20 radially most internally as compared to the nozzles 23b,23d.
  • the nozzles 23b,23d are shaped so as to eject in use a flared blade-shaped or conical jet 8b, having an opening angle ⁇ which is smaller than the angle ⁇ of the other jets 8, which are also flared blade-shaped or conical, ejected in use by the nozzles 23 which are different from the nozzles 23b or 23d.
  • the arm 20 may be provided with reaction thrust generation means to determine in use the rotation about the axis A, in the direction of the arrows ( figure 3 ), in the example shown ( figure 3 ) consisting of propulsion nozzles 30 appropriately oriented and made so as to determine a tangential exiting of service fluid 80 therethrough.
  • the nozzles 30 may be missing and the nozzles 23 themselves may be oriented slightly askew with respect to the axis A, so as to also determine in use, by means of the ejection of the jets 8, the reaction rotation movement of the arm 20 about the axis A.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Claims (9)

  1. Spül- und/oder Waschvorrichtung (1) für ein elektrisches Haushaltgerät (2), welche einen Arm (20) umfasst, der drehbar um eine im Wesentlichen vertikale Achse (A) innerhalb einer Waschkammer (3) des elektrischen Haushaltgeräts gelagert ist, z. B. unmittelbar über einem Aufnahmekorb (4) für Geschirr (5), wobei der Arm einen in ihm ausgebildeten Hohlraum (22) begrenzt, welcher im Gebrauch mit Abgabemitteln (7) für ein druckbeaufschlagtes Betriebsfluid (8) verbindbar ist, und auf einer ersten Fläche des Arms, die im Gebrauch dem Geschirr zugewandt ist, mit einer Vielzahl von Sprühdüsen versehen ist, welche erste Düsen (23b; 23d) und zweite Düsen (23) umfassen, die voneinander beabstandet in Längsrichtung entlang des Armes angeordnet sind und mit dem inneren Hohlraum des Letzteren kommunizieren; wobei einander gegenüberliegende Enden (25, 26) des Armes sich radial und auskragend auf gegenüberliegenden Seiten von der Drehachse (A) aus erstrecken; dadurch gekennzeichnet, dass die ersten Düsen (23b; 23d) radial weiter außen entlang des Armes als die zweiten Düsen (23) angeordnet sind; wobei wenigstens die ersten Düsen (23b; 23d) unter einem Winkel zu der Drehachse (A) hin ausgerichtet sind, um im Gebrauch entsprechende Strahlen (8b) von Betriebsfluid in Richtung des Geschirrs auszustoßen, die schräg zu dem Geschirr ausgerichtet sind und stets zu der Drehachse (A) hin zusammenlaufen, so dass die Fläche, die im Gebrauch von den ersten und zweiten Düsen (23b; 23d, 23) des Armes befeuchtet wird, innerhalb eines Kreises um die Drehachse (A) begrenzt ist, welcher im Gebrauch von den einander gegenüberliegenden auskragenden Enden des Armes überdeckt wird.
  2. Vorrichtung (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Drehachse (A) des Armes in der Mitte des Armes (20) selbst positioniert ist; wobei der Letztere einen Montageabschnitt (21) zu seiner Befestigung an der Drehachse (A) aufweist, der im Wesentlichen in der Mitte des Armes selbst angeordnet ist, so dass einander gegenüberliegende Längsabschnitte (27, 28) des Armes, die mit der ersten Fläche und den Düsen (23) versehen sind und mit den einander gegenüberliegenden Enden (25, 26) des Armes enden, im Gebrauch auf eine im Wesentlichen symmetrische Weise von dem Montageabschnitt (21) aus in einer radialen Richtung bezüglich der Drehachse (A) vorstehen.
  3. Vorrichtung (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die ersten Düsen an den einander gegenüberliegenden Enden des Armes angeordnet sind.
  4. Vorrichtung (1) nach Anspruch 3, dadurch gekennzeichnet, dass die sämtlichen Düsen, einschließlich der ersten Düsen, im Wesentlichen koplanar mit der ersten Fläche des Armes ausgerichtet sind; wobei die einander gegenüberliegenden Enden des Armes so geformt sind, dass sie infolgedessen auf der Seite der ersten Fläche um einen gewünschten Winkel zu der Drehachse (A) hin gebogen sind.
  5. Vorrichtung (1) nach Anspruch 4, dadurch gekennzeichnet, dass die einander gegenüberliegenden Enden des Armes aus Enden eines ursprünglich geraden Armes bestehen, welche durch plastische Verformung, um einen Winkel oder eine Kurve zu formen, und ohne den inneren Hohlraum des Armes zu versperren, auf der Seite der ersten Fläche des Armes zu der Drehachse (A) hin gebogen worden sind.
  6. Vorrichtung (1) nach Anspruch 3, dadurch gekennzeichnet, dass der Arm (20) im Wesentlichen gerade ist; wobei die ersten Düsen mit einer Symmetrieachse (D) ausgebildet sind, entlang welcher sie einen besagten Strahl von Betriebsfluid auszustoßen in der Lage sind, der bezüglich der ersten Fläche mit einer geneigten Richtung und unter einem solchen Winkel ausgerichtet ist, dass die Strahlen zur Drehachse hin zusammenlaufen.
  7. Vorrichtung (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Arm die ersten Düsen und zweiten Düsen, die von den ersten verschieden sind, trägt, wobei die zweiten Düsen alle entlang des Armes radial weiter innen angeordnet sind als die ersten Düsen; wobei die Letzteren so geformt sind, dass sie einen konischen oder sich trichterförmig erweiternden blattförmigen Strahl ausstoßen, der einen Öffnungswinkel aufweist, der kleiner als derjenige entsprechender, ebenfalls konischer oder sich trichterförmig erweiternder blattförmiger Strahlen ist, die im Gebrauch von den zweiten Düsen ausgestoßen werden.
  8. Vorrichtung (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Arm (20) mit Mitteln zur Erzeugung von Reaktionsschub (30; 23) versehen ist, um im Gebrauch die Rotation desselben um die Achse (A) zu bewirken.
  9. Elektrisches Haushaltgerät (2), insbesondere Frontlade-Geschirrspülmaschine, welche eine Waschkammer (3), die wenigstens einen Aufnahmekorb (4) für das zu waschende Geschirr (5) aufnimmt, und Mittel (7) zur Abgabe eines druckbeaufschlagten Betriebsfluids (8), z. B. von Spülwasser, in Richtung eines in der Waschkammer (3) angeordneten Auslasses (10) mit einer im Wesentlichen vertikalen Symmetrieachse (A), umfasst, dadurch gekennzeichnet, dass es eine Vorrichtung (1) nach einem der Ansprüche 1 bis 8 umfasst, wobei der Arm (20) mit einem zentralen Montageabschnitt (21) desselben frei beweglich und fluiddicht an dem Auslass (10) gelagert ist, unmittelbar über dem Korb (4).
EP08859247.2A 2007-12-05 2008-12-05 Klarspül- und/oder reinigungsvorrichtung mit geringem wasserverbrauch und geschirrspülmaschine mit einer solchen vorrichtung Not-in-force EP2242413B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO20070882 ITTO20070882A1 (it) 2007-12-05 2007-12-05 Dispositivo di risciacquo e/o lavaggio a ridotto consumo d'acqua e macchina lavastoviglie includente tale dispositivo
PCT/US2008/085615 WO2009076181A1 (en) 2007-12-05 2008-12-05 Low-water-consumption rinsing and/or washing device, and dishwashing machine featuring such a device

Publications (2)

Publication Number Publication Date
EP2242413A1 EP2242413A1 (de) 2010-10-27
EP2242413B1 true EP2242413B1 (de) 2017-11-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08859247.2A Not-in-force EP2242413B1 (de) 2007-12-05 2008-12-05 Klarspül- und/oder reinigungsvorrichtung mit geringem wasserverbrauch und geschirrspülmaschine mit einer solchen vorrichtung

Country Status (3)

Country Link
EP (1) EP2242413B1 (de)
IT (1) ITTO20070882A1 (de)
WO (1) WO2009076181A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12390081B2 (en) 2020-07-22 2025-08-19 Samsung Electronics Co., Ltd. Dishwasher

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2350084A1 (fr) * 1976-05-05 1977-12-02 Bodson Claude Bras de lavage de lave-vaisselle
DE8609946U1 (de) * 1986-04-11 1987-08-13 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Geschirrspülmaschine mit einem Sprüharm
DE4036930A1 (de) * 1990-11-20 1992-05-21 Miele & Cie Rotierbarer sprueharm fuer eine geschirrspuelmaschine
KR200152825Y1 (ko) * 1997-02-14 1999-07-15 전주범 식기세척기의 분사노즐
IT248022Y1 (it) * 1999-05-03 2002-12-09 Electrolux Zanussi Elettrodome Lavastoviglie con mulinello irroratore epicicloidale

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12390081B2 (en) 2020-07-22 2025-08-19 Samsung Electronics Co., Ltd. Dishwasher

Also Published As

Publication number Publication date
WO2009076181A1 (en) 2009-06-18
EP2242413A1 (de) 2010-10-27
ITTO20070882A1 (it) 2009-06-06

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