EP2294962B1 - Bras d'arrosage pour une lave-vaisselle - Google Patents

Bras d'arrosage pour une lave-vaisselle Download PDF

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Publication number
EP2294962B1
EP2294962B1 EP10178371.0A EP10178371A EP2294962B1 EP 2294962 B1 EP2294962 B1 EP 2294962B1 EP 10178371 A EP10178371 A EP 10178371A EP 2294962 B1 EP2294962 B1 EP 2294962B1
Authority
EP
European Patent Office
Prior art keywords
arm
support arm
spray
liquid
dishwasher
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.)
Expired - Lifetime
Application number
EP10178371.0A
Other languages
German (de)
English (en)
Other versions
EP2294962A1 (fr
Inventor
Anders Haegermarck
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.)
Electrolux Home Products Corp NV
Original Assignee
Electrolux Home Products Corp 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
Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to PL10178371T priority Critical patent/PL2294962T3/pl
Publication of EP2294962A1 publication Critical patent/EP2294962A1/fr
Application granted granted Critical
Publication of EP2294962B1 publication Critical patent/EP2294962B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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

  • This invention relates to a wash arm arrangement for a dishwasher comprising a treatment chamber having one or several freely rotating support arms that are provided with one or several freely rotating spray arms through which liquid is distributed to the dish in the treatment chamber.
  • Conventional dishwashers of the household type are usually provided with an upper and a lower rotating wash arm provided with several spray nozzles distributing the cleaning liquid to the dish which is placed in the treatment chamber. At least one of the nozzles is arranged such that a reaction force is created causing the wash arm to rotate.
  • These spray systems have the disadvantage that the each spray of the rotating nozzle hits the same circle every revolution.
  • the purpose of this invention is, contrary to traditional wash arm systems, to use a dishwasher spraying system that is distributing the liquid in a non uniform way by driving the support arm in incremental steps. This means that a more effective and faster washing can be achieved resulting in less water and energy consumption. It also means a simple and cheap wash arm arrangement using a freely rotating support arm that is provided with a freely rotating spray arm for driving the support arm. The arrangement is such that all the liquid used in the washing procedure is arranged to flow through the spray nozzle and there is consequently no loss of flow in order to drive the support arm separately.
  • FIG. 1 shows a perspective view of a dishwasher according to the invention
  • Fig. 2 is a schematic plan view of the wash arm arrangement according to the invention
  • Fig. 3 is a section on the line III-III in Fig 2
  • Fig 4 shows the driving forces of the spray arm and the support arm.
  • Fig. 1 shows a dishwasher 10 having a treatments chamber 11 in which dish is inserted on a lower and an upper basket 12 and 13.
  • the treatment chamber is provided with a door 14 and has a wash arm arrangement 15 placed below the lower basket 12 as well as below the upper basket 13.
  • the dishwasher is in a conventional manner provided with a circulation pump that distributes a cleaning liquid from a collecting container at the bottom of the treatment chamber to the wash arm arrangement from which it is sprayed towards the dish which is placed on the baskets.
  • the wash arm arrangement 15 comprises a support arm 16 that is rotating freely on a feeding duct 17 to which the cleaning liquid is supplied by said circulation pump.
  • the support arm has a closed structure with the exception of an inlet opening 18 placed at the feeding duct 17 and an outlet sleeve 19 at the outer end of the support arm.
  • the outlet sleeve 19 supports a spray arm 20 that rotates freely on the sleeve.
  • the spray arm is provided with several nozzles 21 that direct the flow mainly vertically towards the dish.
  • the spray arm is further provided with an additional nozzle 22 at one of its ends through which a cleaning liquid jet is directed obliquely upwards or sideways.
  • the arrangement operates in the following way. Cleaning liquid is distributed from the feeding duct 17 via the opening 18 into the support arm 16 and further through the outlet sleeve 19 and the nozzles 21 via the spray arm 20. Simultaneously liquid is flowing out through the nozzle 22 mainly perpendicular to the length direction of the spray arm 20 causing a horizontal driving force F on the spray arm. This force F creates a momentum about the sleeve 19 such that the spray arm 20 starts to rotate. The rotation of the spray arm 20 generates a friction momentum C at the sleeve 19 that forces the support arm 16 to rotate.
  • the force F is transmitted to the support arm 16 through the sleeve 19 by its component F1 parallel to the support arm 16 and F2 perpendicular to it.
  • Component F2 creates a momentum around the feeding duct 17 which is added up to the friction momentum C at the sleeve 19 and contributes to the rotation of the support arm 16.
  • the support arm 16 rotates with periodical angular velocity originated by a constant component C (friction given by satellite rotation) added up to a periodical one given by the component F2 of the force F.
  • the support arm 16 is rotated in incremental steps. Due to that the increment steps are not fixed the position of the sprays will vary continuously thereby minimizing the risk for areas not being washed.
  • the system creates a heavy flow directed at the items above the wash arm and this flow transports the dirt away in an efficient manner.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Claims (8)

  1. Lave-vaisselle comprenant une chambre de traitement (11) et un agencement de bras de lavage ayant un ou plusieurs bras de support libres en rotation (16) qui sont pourvus d'un ou de plusieurs bras de pulvérisation (20) libres en rotation pour entraîner le bras de support (16), du liquide étant distribué à travers ledit bras de pulvérisation (20) à la vaisselle dans la chambre de traitement,
    caractérisé en ce que
    le liquide est distribué de manière non uniforme en entraînant le bras de support (16) par incréments,
    le bras de pulvérisation (20) étant pourvu d'au moins une buse (22) agencée de telle sorte qu'une composante de force de réaction horizontale (F) provenant du jet s'écoulant hors de la buse crée un moment (C) pour le bras de pulvérisation (20) autour de son centre de rotation ainsi qu'un moment (M) pour le bras de support (16) autour de son centre de rotation, et
    un frottement approprié au niveau des moyens de support (17, 19) du bras de pulvérisation (20) et du bras de support (16) étant choisi de manière à réaliser la rotation du bras de support (16) par incréments.
  2. Lave-vaisselle selon la revendication 1, caractérisé en ce que la totalité du mouvement du bras de support est créée en tant que forces de réaction et/ou moments de réaction provenant du jet sortant du bras de pulvérisation.
  3. Lave-vaisselle selon la revendication 1 ou 2, caractérisé en ce que la totalité du liquide acheminé au bras de support (16) est prévue pour s'écouler vers l'extérieur jusque dans la chambre de traitement à travers le bras de pulvérisation (20).
  4. Lave-vaisselle selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le bras de support (16) est une structure fermée ayant une entrée de liquide (18) et une sortie de liquide (19).
  5. Lave-vaisselle selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le bras de pulvérisation (20) est pourvu d'au moins une buse (22) prévue de telle sorte qu'une composante de force de réaction horizontale (F) provenant du jet s'écoulant hors de la buse crée un moment (C) pour le bras de pulvérisation (20) autour de son centre de rotation ainsi qu'un moment (M) pour le bras de support (16) autour de son centre de rotation.
  6. Lave-vaisselle selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le lave-vaisselle est pourvu d'au moins un conduit d'alimentation en liquide (17) sur lequel le bras de support est prévu pour tourner.
  7. Lave-vaisselle selon la revendication 6, caractérisé en ce que ledit bras de support (16) comprend un manchon de sortie (19) qui supporte un bras de pulvérisation (20) tournant librement sur le manchon (19), et en ce qu'un frottement approprié au niveau du conduit d'alimentation (17) et au niveau du manchon (19) est choisi de manière à réaliser la rotation du bras de support (16) par incréments.
  8. Lave-vaisselle selon la revendication 7, caractérisé en ce que le bras de support (16) est une structure fermée ayant une entrée de liquide (18) placée au niveau du conduit d'alimentation (17) et une sortie de liquide constituée par ledit manchon de sortie (19).
EP10178371.0A 2003-08-29 2004-08-24 Bras d'arrosage pour une lave-vaisselle Expired - Lifetime EP2294962B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10178371T PL2294962T3 (pl) 2003-08-29 2004-08-24 Układ ramienia zmywającego do zmywarki

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0302325A SE0302325D0 (sv) 2003-08-29 2003-08-29 Device for a dishwasher
EP04445085A EP1510168B1 (fr) 2003-08-29 2004-08-24 Bras d'arrosage pour une lave-vaisselle

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP04445085A Division EP1510168B1 (fr) 2003-08-29 2004-08-24 Bras d'arrosage pour une lave-vaisselle
EP04445085.6 Division 2004-08-24

Publications (2)

Publication Number Publication Date
EP2294962A1 EP2294962A1 (fr) 2011-03-16
EP2294962B1 true EP2294962B1 (fr) 2016-01-13

Family

ID=28673219

Family Applications (2)

Application Number Title Priority Date Filing Date
EP10178371.0A Expired - Lifetime EP2294962B1 (fr) 2003-08-29 2004-08-24 Bras d'arrosage pour une lave-vaisselle
EP04445085A Expired - Lifetime EP1510168B1 (fr) 2003-08-29 2004-08-24 Bras d'arrosage pour une lave-vaisselle

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP04445085A Expired - Lifetime EP1510168B1 (fr) 2003-08-29 2004-08-24 Bras d'arrosage pour une lave-vaisselle

Country Status (4)

Country Link
EP (2) EP2294962B1 (fr)
AT (1) ATE521271T1 (fr)
PL (2) PL2294962T3 (fr)
SE (1) SE0302325D0 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004043772A1 (de) * 2004-09-10 2006-03-30 Electrolux Home Products Corp. N.V. Geschirrspülmaschine mit einer Sprühvorrichtung
EP2215952A1 (fr) * 2009-02-09 2010-08-11 Electrolux Home Products Corporation N.V. Ensemble de bras gicleur pour lave-vaisselle
EP2279687B1 (fr) 2009-07-28 2011-09-21 Electrolux Home Products Corporation N.V. Agencement de bras gicleur pour lave-vaisselle
EP2389851B1 (fr) * 2010-05-25 2013-10-16 Electrolux Home Products Corporation N.V. Ensemble de montage d'un bras d'arrosage pour lave-vaisselle
KR101764293B1 (ko) * 2012-09-07 2017-08-03 삼성전자주식회사 식기 세척기용 노즐 어셈블리 및 이를 이용한 식기 세척기
US10667668B2 (en) 2013-06-27 2020-06-02 Whirlpool Corporation Dishwasher with rotationally mounted sprayer
EP3122228B1 (fr) 2014-03-24 2019-05-22 Electrolux Appliances Aktiebolag Lave-vaisselle comprenant au moins un bras de pulvérisation de lave-vaisselle
DE102015225331B4 (de) * 2015-12-15 2025-06-12 Haier Germany Gmbh Geschirrspülmaschine, Sprühvorrichtung für eine Geschirrspülmaschine und Verfahren zum Betrieb einer Geschirrspülmaschine
AU2016413897B2 (en) * 2016-07-08 2023-04-06 Electrolux Appliances Aktiebolag Wash arm assembly and dishwasher comprising wash arm assembly
CA3029843A1 (fr) * 2016-07-08 2018-01-11 Electrolux Appliances Aktiebolag Ensemble bras de lavage
CN109965816B (zh) * 2017-12-28 2024-01-16 宁波方太厨具有限公司 一种清洗机
CN113693533A (zh) * 2021-08-30 2021-11-26 珠海格力电器股份有限公司 洗碗机及其清洗控制方法及喷臂清洗方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1600196A (fr) * 1968-12-31 1970-07-20
CH519902A (fr) * 1970-01-29 1972-03-15 Frame Sa Rotor d'aspersion d'une machine à laver la vaissele et la verrerie industrielle
US3771725A (en) * 1972-05-12 1973-11-13 Gen Electric Washing appliance having an improved spray arm assembly
US5477874A (en) 1993-08-13 1995-12-26 Matsushita Electric Industrial Co., Ltd. Dishwasher
DE4416655A1 (de) * 1994-05-11 1995-11-16 Heinz Gutoehrlein Sprüharm für Spülmaschinen
IT1275156B (it) 1995-02-15 1997-07-30 Smeg Spa Gruppo irroratore girevole per lavastoviglie dotato di moto alternato orizzontale
IT1275155B (it) * 1995-02-15 1997-07-30 Smeg Spa Gruppo irroratore girevole per lavastoviglie dotato di moto alternato orizzontale

Also Published As

Publication number Publication date
PL2294962T3 (pl) 2016-06-30
EP2294962A1 (fr) 2011-03-16
EP1510168A9 (fr) 2010-12-08
PL1510168T3 (pl) 2012-01-31
EP1510168A2 (fr) 2005-03-02
EP1510168B1 (fr) 2011-08-24
ATE521271T1 (de) 2011-09-15
SE0302325D0 (sv) 2003-08-29
EP1510168A3 (fr) 2006-05-10

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