(19)
(11)EP 2 961 878 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
31.01.2018 Bulletin 2018/05

(21)Application number: 13706547.0

(22)Date of filing:  28.02.2013
(51)International Patent Classification (IPC): 
D06F 37/26(2006.01)
D06F 39/08(2006.01)
(86)International application number:
PCT/EP2013/054021
(87)International publication number:
WO 2014/131450 (04.09.2014 Gazette  2014/36)

(54)

WASHING MACHINE WATER JET NOZZLE

WASSERSTRAHLDÜSE FÜR WASCHMASCHINE

BUSE À JET D'EAU POUR LAVE-LINGE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(43)Date of publication of application:
06.01.2016 Bulletin 2016/01

(73)Proprietor: Arçelik Anonim Sirketi
34950 Istanbul (TR)

(72)Inventors:
  • UGUS, Ufuk
    34950 Istanbul (TR)
  • CELIK, Irfan
    34950 Istanbul (TR)
  • ERDEM, Ilkan
    34950 Istanbul (TR)


(56)References cited: : 
EP-A1- 1 507 030
WO-A2-2011/046363
DE-A1- 4 330 079
EP-A2- 2 108 731
WO-A2-2011/053091
KR-A- 20110 025 566
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description


    [0001] The present invention relates to a washing machine having an improved water jet nozzle.

    [0002] Washing machines are generally classified as a top loading type washing machine or a front loading type washing machine. It is well-known that a front loading type washing machine contains a tub in a cabinet for receiving washing water and a drum rotatably mounted in the tub.

    [0003] Typically, wash water is received in the tub, and cloth items to be washed are placed in the drum. Cloth items are then lifted and dropped by lifters while the drum is rotated so that washing and rinsing process is carried out.

    [0004] The washing machine of the above type further incorporates a pump unit for circulating washing water in the lower part of the tub, said pump unit conveying washing water to an upper part of the tub such that a more effcient washing angle can be obtained by means of a nozzle whereby water jets from said upper part of the tub are delivered.

    [0005] It is to be noted 20 % of total household water consumption originate from washing machines. To address this phenomenon, manufacturers design and implement various arrangements in need of improving water consumption performance of such machines. Water jet nozzles are used in this regard as they provide more localized wash water targeting cloth items in a more accurate manner. As modern washing programs more and more utilize less wash water, there are times it can be mistaken that the washing machine is malfunctioning as no water flow is observed from outside the door. The present invention ensures that a certain amount of water flow is noticeable on the inner surface of the front door such that users can monitor and confirm by themselves proper functioning of the machine.

    [0006] Moreover and more importantly, it is to be noted that the inner surface of the front door is susceptible to buildup of detergent deposits, which is not desired as such deposits cause stains and/or bad odors. To this end, the arrangement according to the present invention overcomes such inconveniences by means of a structurally improved water jet nozzle in a simple and efficient manner.

    [0007] In the prior art, a washing machine (1') comprising a rotary drum (3') rotated around the horizontal axis and wherein the laundry is placed. A water tub (2') in which the rotary drum (3') rotates is provided such that a motor (7') drives a rotary drum (3') by means of a pulley mechanism (10') disposed outside the water tub (2'). The latter transmits rotational movement of the motor (7') to the rotary drum (3'). The washing machine (1') conventionally further comprises a discharge pump that discharges the wash water at the end of the washing process; a discharge conduit conveys the wash water accordingly. On the other hand, a pump (4') placed along a circulation pipe (5') conventionally draws wash water stored in the water tub (2') and pressurizes the wash water flowing in a nozzle water conduit (9') for conveying it into the rotary drum (3'). This mechanism allows the wash water stored in the water tub (2') to run through the nozzle water conduit (9') and to circulate to the water tub (2'). In this regard, a motor is drivingly coupled to the pump (4') which delivers pressured water to a spray nozzle (8') via the nozzle water conduit (9'). A bellows (7') is disposed between the rotary drum (3') and the washing machine (1') body such that one end of the bellows (12) is connected to the water tub (2'). A conventional drum-type washing machine jets the wash water from a front door (6') side toward the inner part of the rotary drum (3') through said spray nozzle (8') placed above the rotary drum (3') at the front door (6) side.

    [0008] The present invention provides a washing machine with a structurally improved water jet nozzle, which is provided by the characterizing features as defined in Claim 1. International Patent Application WO 2011/053091 A2 discloses a washing machine comprising a nozzle device that is arranged within a gasket at the door of the machine. The nozzle device has a drum spray portion for spraying water into the drum and a door spray portion for spraying water onto the door.

    [0009] Korean Patent Application KR 2011 0025566 A discloses a washing machine with a nozzle for spraying water tangentially to the door of the machine.

    [0010] German Patent Application DE 43 30 079 A1 describes a washing machine in which water is directed by channel formed in the door into the tub.

    [0011] Primary object of the present invention is to provide a washing machine with a structurally improved water jet nozzle, said nozzle eliminating buildup of detergent deposits on the front door inner surface of the washing machine.

    [0012] The present invention proposes a washing machine according to the features of claim 1. Preferred embodiments of the invention are claimed in dependent claims 2 to 10.

    [0013] A pump is provided in a circulation pipe, which draws wash water stored in the water tub. Pressured water is supplied to a spray nozzle through a nozzle water conduit. In this way, the spray nozzle produce water jets targeting cloth items in the drum. Preferably, a second nozzle, namely a front door nozzle is arranged to target inner surface of the front door to eliminate deposit buildup thereon.

    [0014] The front door nozzle has a nozzle aperture at the lower end of the front door nozzle such that a directional flow control means for example a rib fixed on the internal base or produced as a single part of the front door nozzle directs wash water onto the door. A small aperture areal is obtained in between a radial wall element and the directional flow control means such that water's flow rate is increased by reduction of the sectional area of the small aperture.

    [0015] The directional flow control means is shaped as a right trapezoid extending radially on the circular-form internal base. The adjacent right angles of the trapezoid lie at the radially remote end from the center of the internal base. The inclined side of the same receives wash water at first hand. The nozzle aperture may also have a second portion for spraying water over cloth items.

    [0016] Accompanying drawings are given solely for the purpose of exemplifying a washing machine with an improved water jet nozzle whose advantages over prior art were outlined above and will be explained in brief hereinafter.

    [0017] The drawings are not meant to delimit the scope of protection as identified in the claims nor should they be referred to alone in an effort to interpret the scope identified in the claims without recourse to the technical disclosure in the description of the present invention.

    [0018] Fig. 1 demonstrates a side cut-away view of a washing machine according to the prior art.

    [0019] Fig. 2 demonstrates a side cut-away view of a washing machine according to the present invention.

    [0020] Fig. 3 demonstrates a front view of a washing machine according to the present invention.

    [0021] Fig. 4 demonstrates a perspective view of a washing machine front part with a front door nozzle according to the present invention.

    [0022] Fig. 5a, 5b and 5c respectively demonstrate side, front and perspective views of a front door water jet nozzle according to the present invention. Fig. 5d demonstrates a bottom cut-away view of a water jet nozzle according to the present invention.

    [0023] The following numerals are used in the detailed description:

    Washing machine (1)

    Water tub (2)

    Rotary drum (3)

    Pump (4)

    Circulation pipe (5)

    Front door (6)

    Motor (7)

    Spray nozzle (8)

    Nozzle water conduit (9)

    Pulley mechanism (10)

    Front door nozzle (11)

    Bellows (12)

    Nozzle body (13)

    Nozzle aperture (14)

    Directional flow control means (15)

    Nozzle internal base (16)

    Radial wall element (17)

    Inclined surface (18)

    Small aperture area (19)

    Drum targeting opening (20)

    The present invention proposes a washing machine designated generally by the numeral 1.



    [0024] The present invention relates to a washing machine (1) comprising a rotary drum (3) rotated around the horizontal axis and wherein the laundry is placed. A water tub (2) in which the rotary drum (3) rotates is provided such that a motor (7) drives a rotary drum (3) by means of a pulley mechanism (10) disposed outside the water tub (2). The latter transmits rotational movement of the motor (7) to the rotary drum (3).

    [0025] The washing machine (1) further comprises a discharge pump that discharges the wash water at the end of the washing process; a discharge conduit conveys the wash water accordingly. On the other hand, a pump (4) placed along a circulation pipe (5) conventionally draws wash water stored in the water tub (2) and pressurizes the wash water flowing in a nozzle water conduit (9) for conveying it into the rotary drum (3). This mechanism allows the wash water stored in the water tub (2) to run through the nozzle water conduit (9) and to circulate to the water tub (2). In this regard, a motor is drivingly coupled to the pump (4) which delivers pressured water into the rotary drum (3) via said nozzle water conduit (9). A bellows (7) is disposed between the rotary drum (3) and the washing machine (1) body such that one end of the bellows (12) is connected to the water tub (2).

    [0026] According to the present invention, a front door nozzle (11), is provided to spray water over the inner surface of the front door (6) in order for eliminating deposit buildup thereon and also for providing a visually observable indication of working status of the washing machine (1). The front door nozzle (11) receives pressurized wash water also from said nozzle water conduit (9).

    [0027] In an embodiment of the present invention, the washing machine (1) comprising a spray nozzle (8) providing to flush the wash water from a front door (6) side toward the inner part of the rotary drum (3) placed above the rotary drum (3) at the front door (6) side with said front door nozzle (11) (Fig.2).

    [0028] Alternatively the front door nozzle (11) may be employed to fulfill both functions, i.e. which targets both cloth items and the inner surface of the front door (6) at once, as will be explained hereinafter.

    [0029] In an embodiment of the present invention, the front door nozzle (11) may preferably be installed within the bellows (12) so as to be oriented perpendicular to the base of the washing machine (1). Alternatively, the front door nozzle (11) may be located at any suitable location where the inner surface of the front door (6) can be targeted.

    [0030] The front door nozzle (11) as such has a tubular body (13) in fluid communication with the nozzle water conduit (9) and a nozzle aperture (14) disposed at the lower end of said nozzle body (13). Said nozzle aperture (14) has a directional flow control means (15) in the form of an upright wall element that is formed on the internal base (16) for diverting water flow to the front door (6). The front door nozzle's (11) ultimate location relative to the front door (6) is determined considering the direction of effect of said directional flow control means (15).

    [0031] Pressurized water reaching the nozzle aperture (14) through the nozzle body (13) is directed towards the front door (6) by means of a small opening area (19) formed between the directional flow control means (15) and a radial wall element (17). This small opening area (19) provides an increased flow rate with more accurate targeting due to the narrowed flow pathway.

    [0032] The wash water running down to the nozzle aperture (14) therefore leaves the front door nozzle (11) to hit the front door (6) through the small opening area (19) sweeping through an arc of less than 60 degrees. The internal base (16) of the front door nozzle (11) is preferably circular.

    [0033] Said directional flow control means (15) has an inclined surface (18) at which water strikes the same such that this inclined surface (18) with respect to the internal base (16) helps avoiding blockage of water flow in a smoother manner. The directional flow control means (15) is preferably designed in the form of a right trapezoid with its oblique side extending near the center of the internal base (16).

    [0034] The nozzle aperture (14) according to the present invention has a second portion, that is, a drum targeting opening (20) outside the small opening area (19) between said directional flow control means (15) and said radial wall element (17). This drum targeting opening (20) can be designed to lie adjacent to said small opening area (19) or can be separated therefrom by a solid block such that the two openings (19, 20) are arranged in radially opposite directions.


    Claims

    1. A washing machine (1) comprising

    - a rotary drum (3) in which cloth items are placeable and accessible via a front door (6),

    - a water tub (2) in which the rotary drum (3) is rotatable,

    - a motor (7) providing said rotary drum (3) to be driven by means of a pulley mechanism (10), the latter disposed outside the tub (2),

    - a pump (4) along a circulation pipe (5) drawing wash water stored in said water tub (2) and delivering pressured water to a front door nozzle (11) via a nozzle water conduit (9),
    wherein said front door nozzle (11)

    - is arranged to jet wash water to an inner surface of the front door (6),

    - has a tubular nozzle body (13) in fluid communication with the nozzle water conduit (9) and a nozzle aperture (14) disposed at the one end of said nozzle body (13),

    - has a directional flow control means (15) in the form of an upright wall element that is formed on an internal base (16) of the nozzle aperture (14) for diverting water flow to the front door (6), characterized that the directional flow control means (15) is shaped as a right trapezoid extending radially on the circular-form internal base (16) with the adjacent right angles of the trapezoid lying at the radially remote end from the center of the internal base (16) and wherein the directional flow control means (15) has an inclined surface (18) at which water strikes the same whereby said inclined surface with respect to the internal base (16) helps avoiding blockage of water flow.


     
    2. A washing machine (1) as in Claim 1, characterized in that the front door nozzle (11) is disposed within a bellows (7) between the rotary drum (3) and the washing machine (1) body so as to be oriented perpendicular to base of the washing machine (1).
     
    3. A washing machine (1) as in Claim 1 or 2, characterized in that water reaching the nozzle aperture (14) through the nozzle body (13) is directed towards the front door (6) by means of an opening area (19) formed between the directional flow control means (15) and a radial wall element (17).
     
    4. A washing machine (1) as in Claim 1 and 3, characterized in that said opening area (19) sweeps through an arc of less than 60 degrees.
     
    5. A washing machine (1) as in any of Claims 1 to 4, characterized in that the directional flow control means (15) extends in a radial manner.
     
    6. A washing machine (1) as in any of Claims to 1 to 5, characterized in that the directional flow control means (15) is designed in the form of a right trapezoid with its oblique side extending near center of the internal base (16).
     
    7. A washing machine (1) as in any of Claims to 3 to 6, characterized in that the nozzle aperture (14) has a second portion in the form of a drum targeting opening (20) outside the opening area (19).
     
    8. A washing machine (1) as in Claim 7, characterized in that said drum targeting opening (20) is arranged either adjacent to the opening area (19) or radially opposite to the same.
     
    9. A washing machine (1) as in Claim 1 and 2, characterized in that the internal base (16) of the nozzle aperture (14) is not in parallel with base of said washing machine (1).
     
    10. A washing machine (1) as in any of the above Claims, characterized by a spray nozzle (8) providing to flush the wash water from a front door (6) side toward the inner part of the rotary drum (3) placed above the rotary drum (3) at the front door (6) side with said front door nozzle (11).
     


    Ansprüche

    1. Eine Waschmaschine (1) bestehend aus

    - einer Drehtrommel (3), wo die Stoffstücke platzierbar und zugänglich sind durch eine Vordertür (6),

    - einer Wasserröhre (2), wo die Drehtrommel (3) rotierbar ist,

    - einem Motor (7), der sicherstellt, daß besagte Drehtrommel (3) getrieben wird mit Hilfe von einem Rollenmechanismus (10), das letztere ist angeordnet außerhalb der Röhre (2),

    - einer Pumpe (4) längs einer Zirkulationspumpe (5), die das Waschwasser auszieht, das in besagter Wasserröhre (2) gespeichert wird und liefert das Druckwasser zu einer Vordertürdüse (11) durch eine Düsenwasserleitung (9), wo besagte Vordertürdüse (11),

    - angeordnet ist für den Strahl von Waschwasser zu einer inneren Fläche der Vordertür (6),

    - hat einen rohrförmigen Düsenkörper (13) in Flüssigkeitsverbindung mit der Düsenwasserleitung (9) und einer Düsenöffnung (14) angeordnet an einem Ende des besagten Düsenkörpers (13),

    - hat ein Richtflusssteuermittel (15) in der Form von einem senkrechten Wandelement, daß gebildet ist auf einer inneren Unterlage (16) der Düsenöffnung (14) für Ablenkung den Wasserfluss zur Vordertür (6), dadurch gekennzeichnet, daß das Richtflusssteuermittel (15) ist gestaltet als ein rechtes Trapez, das sich sternförmig ausstreckt auf kreisförmiger innerer Unterlage (16) mit anliegenden 90° Winkeln des Trapezes, das am sternförmigen fernen Ende vom Zentrum der inneren Unterlage (16) liegt und wo das Richtflusssteuermittel (15) eine schiefe Fläche (18) hat, wohin das Wasser hinschlägt, wo besagte schiefe Fläche bezüglich innerer Unterlage (16) unterstützt zur Vermeidung für Blockierung des Wasserflusses.


     
    2. Eine Waschmaschine (1) nach Anspruch 1, dadurch gekennzeichnet, daß die Vordertürdüse (11) angeordnet ist in einem Federkörper (7) zwischen der Drehtrommel (3) und dem Körper der Waschmaschine (1), sodaß er senkrecht gerichtet ist zur Grundlage der Waschmaschine (1).
     
    3. Eine Waschmaschine (1) nach Ansprüche 1 oder 2, dadurch gekennzeichnet, daß das Wasser, das die Düsenöffnung (14) durch den Düsenkörper (13) erreicht, hingerichtet ist zur Vordertür (6) mittels einer Öffnungszone (19) gebildet zwischen dem Richtflusssteuermittel (15) und einem radialen Wandelement (17).
     
    4. Eine Waschmaschine (1) nach Anspruch 1 und 3, dadurch gekennzeichnet, daß besagte Öffnungszone (19) fegt durch einen Kreisbogen kleiner als 60°.
     
    5. Eine Waschmaschine (1) nach Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Richtflusssteuermittel (15) sich ausstreckt in einer radialen Weise.
     
    6. Eine Waschmaschine (1) nach den vorhergehenden Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Richtflusssteuermittel (15) entworfen ist in der Form eines rechten Trapez mit seiner schrägen Seite ausstreckend nahe zum Zentrum der internen Unterlage (16).
     
    7. Eine Waschmaschine (1) nach den vorhergehenden Ansprüche 3 bis 6, dadurch gekennzeichnet, daß die Düsenöffnung (14) einen zweiten Teil hat in der Form einer Öffnung (20) zielend die Trommel außerhalb der Öffnungszone (19).
     
    8. Eine Waschmaschine (1) nach Anspruch 7, dadurch gekennzeichnet, daß besagte Öffnung (20) zielend die Trommel angeordnet ist entweder benachbart zur Öffnungszone (19) oder radial gegenüber dem selben.
     
    9. Eine Waschmaschine (1) nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die interne Unterlage (16) der Düsenöffnung (14) nicht in parallel mit der Unterlage der besagten Waschmaschine (1) ist.
     
    10. Eine Waschmaschine (1) nach den vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine Spritzdüse (8) versorgt zur Ausspülung von Waschwasser von Seite einer Vordertür (6) zum inneren Teil der Drehtrommel (3) hingesetzt über der Drehtrommel (3) an der Seite der Vordertür (6) mit besagter Vordertürdüse (11).
     


    Revendications

    1. Machine à laver (1) comprenant

    - un tambour rotatif (3) dans lequel des articles en tissu peuvent être placés et accessibles via une porte avant (6),

    - une cuve à eau (2) dans lequel le tambour rotatif (3) peut tourner,

    - un moteur (7) assurant l'entraînement dudit tambour rotatif (3) au moyen d'un mécanisme de poulie (10), ce dernier étant disposé à l'extérieur de la cuve (2),

    - une pompe (4) le long d'un tuyau de circulation (5) attirant l'eau de lavage stockée dans ladite cuve à eau (2) et délivrant de l'eau sous pression à une buse de porte avant (11) via un conduit d'eau de buse (9),
    dans lequel ladite buse de porte avant (11)

    - est agencé pour projeter de l'eau de lavage sur une surface interne de la porte avant (6),

    - a un corps de buse tubulaire (13) en communication de fluide avec le conduit d'eau de buse (9) et une ouverture de buse (14) disposée à l'une des extrémités dudit corps de buse (13),

    - comporte un moyen de commande du flux directionnel (15) sous la forme d'un élément de paroi qui est formé sur une base interne (16) de l'ouverture de buse (14) pour dévier le flux d'eau vers la porte avant (6), caractérisé en ce que les moyens de commande du flux directionnel (15) ont la forme d'un trapèze droit s'étendant radialement sur la base interne (16) de forme circulaire avec les angles droits adjacents du trapèze se trouvant à l'extrémité radialement éloignée du centre de la base interne (16) et dans lequel les moyens de commande du flux directionnel (15) présentent une surface inclinée (18) à laquelle l'eau frappe la surface, ladite surface inclinée par rapport à la base interne (16) permettant d'éviter le blocage du flux d'eau.


     
    2. Machine à laver (1) selon la revendication 1, caractérisée en ce que la buse de porte avant (11) est disposée dans un soufflet (7) entre le tambour rotatif (3) et le corps de la machine à laver (1) perpendiculairement à la base de la machine à laver (1).
     
    3. Machine à laver (1) selon la revendication 1 ou 2, caractérisée en ce que l'eau atteignant l'ouverture de buse (14) à travers le corps de buse (13) est dirigée vers la porte avant (6) au moyen d'une zone d'ouverture (19) entre les moyens de commande du flux directionnel (15) et un élément de paroi radial (17).
     
    4. Machine à laver (1) selon les revendications 1 et 3, caractérisée en ce que ladite zone d'ouverture (19) déferle un arc de moins de 60 degrés.
     
    5. Machine à laver (1) selon l'une quelconque des revendications 1 à 4, caractérisée en ce que les moyens de commande du flux directionnel (15) s'étendent radialement.
     
    6. Machine à laver (1) selon l'une quelconque des revendications 1 à 5, caractérisée en ce que les moyens de commande du flux directionnel (15) sont réalisés sous la forme d'un trapèze droit dont le côté oblique s'étend près du centre de la base interne (16).
     
    7. Machine à laver (1) selon l'une quelconque des revendications 3 à 6, caractérisée en ce que l'ouverture de buse (14) présente une seconde partie en forme d'une ouverture de ciblage de tambour (20) à l'extérieur de la zone d'ouverture (19).
     
    8. Machine à laver (1) selon la revendication 7, caractérisée en ce que ladite ouverture de ciblage de tambour (20) est disposée de manière adjacente à la zone d'ouverture (19) ou radialement à l'opposé de celle-ci.
     
    9. Machine à laver (1) selon les revendications 1 et 2, caractérisée en ce que la base interne (16) de l'ouverture de buse (14) n'est pas parallèle à la base de ladite machine à laver (1).
     
    10. Machine à laver (1) selon l'une quelconque des revendications précédentes, caractérisée par une buse de pulvérisation (8) prévue pour rincer l'eau de lavage du côté de la porte avant (6) vers la partie interne du tambour rotatif (3) placé au-dessus du tambour rotatif (3) du côté de la porte avant (6) avec ladite buse de porte avant (11).
     




    Drawing























    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description