EP1040787B1 - Geschirrspülmaschine mit Sprüharmen - Google Patents

Geschirrspülmaschine mit Sprüharmen Download PDF

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Publication number
EP1040787B1
EP1040787B1 EP00102536A EP00102536A EP1040787B1 EP 1040787 B1 EP1040787 B1 EP 1040787B1 EP 00102536 A EP00102536 A EP 00102536A EP 00102536 A EP00102536 A EP 00102536A EP 1040787 B1 EP1040787 B1 EP 1040787B1
Authority
EP
European Patent Office
Prior art keywords
water
inlet port
chamber
supplied
dishwashing machine
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.)
Revoked
Application number
EP00102536A
Other languages
English (en)
French (fr)
Other versions
EP1040787A1 (de
Inventor
Ugo Favret
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 Zanussi Elettrodomestici SpA
Electrolux Zanussi SpA
Original Assignee
Electrolux Zanussi Elettrodomestici SpA
Electrolux Zanussi SpA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11395510&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1040787(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Electrolux Zanussi Elettrodomestici SpA, Electrolux Zanussi SpA filed Critical Electrolux Zanussi Elettrodomestici SpA
Publication of EP1040787A1 publication Critical patent/EP1040787A1/de
Application granted granted Critical
Publication of EP1040787B1 publication Critical patent/EP1040787B1/de
Anticipated expiration legal-status Critical
Revoked 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
    • A47L15/42—Details
    • A47L15/4278—Nozzles
    • A47L15/4282—Arrangements to change or modify spray pattern or direction
    • 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 dishwashing machine with improved spraying means, which are capable of enabling the machine to operate in a more versatile manner with substantial energy saving effects.
  • Modern dishwashing machines are generally known to usually comprise, to the purpose of supporting the various washload items in the interior of a washing vessel, an upper rack and a lower rack, below which there are arranged respective rotating spray arms with nozzles adapted to issue washing water spray jets directed upwards.
  • the upper rotating spray arm may also comprise nozzles adapted to issue auxiliary water spray jets that are directed downwards.
  • auxiliary water spray jets cause the overall water flow rate of the washing water carrying circuit of the dishwashing machine, with particular reference to the therewith associated circulation pump, to be increased, which practically means a corresponding increase in the overall energy usage of the machine.
  • dishwashing machines are also known in the art which, as described for instance in DE-A-3 830 717, are substantially provided, in correspondence of the top wall of the washing vessel, with a further upper spray arm adapted to issue water spray jets that are directed downwards.
  • the intermediate rotating spray arm only or the upper spray arm and the lower spray arm it is possible for either the intermediate rotating spray arm only or the upper spray arm and the lower spray arm to be supplied with water selectively.
  • the washload items arranged on the racks are hit, ie. wetted by water spray jets coming frpm above and water spray jets coming from below, at the same time.
  • Such solutions prove obviously unsatisfactory owing to the complicated construction involved by them.
  • the sizing of the washing water carrying circuit of the machine turns practically out as being clearly out-of-balance when considered with reference to the two different conditions in which either a single rotating spray arm is supplied or the two remaing rotating spray arms are supplied at the same time.
  • EP-A-0 795 292 discloses a dishwashing machine with a spraying device of the hydraulic whirler type forming two separate manifolds, each provided with spraying nozzles which travel along separate spraying paths, the two manifolds being selectively fed in such a manner that the combined feeding of them by a pump makes it possible to achieve a high spraying flow rate with low-energy spraying jets and the selective feeding of only one of the two manifolds makes it possible to obtain spraying jets with high kinetic energy, although of lower cumulative flow rate.
  • the disclosed solution uses a diverting unit, for example of the rotating cylinder type, actuated by a motor member, which is not only an electromechanical complicated component but also requires an additional consumption of energy.
  • the dishwashing machine comprises mainly a washing vessel 5, in which there are accommodated, for supporting the washload items, at least an upper rack 6 and preferably at least a lower rack 7.
  • Said racks 6 and 7 are associated to respective spraying means that preferably comprise hollow rotating spray arms 8 and 9 arranged therebelow. These rotating spray arms are provided with a plurality of main spray nozzles 10 adapted to eject respective washing water spray jets that are substantially directed towards the respective racks, as this will be described in greater detail further on.
  • At least one of these rotating spray arms 8, 9 also comprises at least an auxiliary nozzle 12 adapted to eject a respective water spray jet, as this will be better explained further on.
  • auxiliary nozzles 12 are provided in the upper rotating spray arm 8 to the purpose of ejecting water spray jets that are directed against the lower rack 7 arranged therebelow.
  • the rotating spray arms 8, 9 are supplied with water which is delivered under pressure by a circulation pump 13, which is adapted to be operated so as to ensure that the pressure of the water supplying the rotating spray arms 8, 9 is selectively commutable between a higher value and a lower value.
  • the pump 13 may for instance be caused to operate in the manner as substantially described in IT-B-1 256 273.
  • each rotating spray arm that is so provided with main nozzles 10 and auxiliary nozzles 12 comprises commutator means adapted to enable the main nozzles 10 or the auxiliary nozzles 12 to be selectively supplied with water under pressure.
  • said commutator means are namely adapted to selectively connect the main nozzles 10 or the auxiliary nozzles 12 with the inlet port 16, which is connected to the pump 13, of the rotating spray arm 8 ( Figure 2 and 3).
  • the commutator means are adapted to be operated hydraulically in an automatic manner and, to such a purpose, a partition wall 17 may be provided so as to substantially divide the interior of the rotating spray arm 8 into two separate chambers 18 and 19 communicating with the main nozzles 10 and the auxiliary nozzles 12, respectively.
  • the partition wall 17 is provided centrally with an aperture 20 in which a pan-like member 21 provided with a central passage 22 is able to slide freely, thereby substantially sealing it.
  • a substantially cylindrical compression spring 23 extending from the bottom wall 4 of the rotating spray arm 8 normally keeps the pan-like member 21 abutting against the rim of the inlet port 16, which therefore is prevented from communicating with the chamber 18.
  • the inlet port 16 communicates with the chamber 19 through the passage 22, which has a smaller diameter.
  • the force of the spring 23 is so rated as to be able to keep the pan-like member 21 in the position shown in Figure 2 even when the pump 13 supplies the rotating spray arms 8, 9 with water having the afore cited lower pressure value. Therefore, the water that is delivered to the inlet port 16 of the rotating spray arm 8 operates the auxiliary nozzles 12 only by flowing into the chamber 19 through the passage 22 of the pan-like member 21. as well as passing through the expanded coils of the spring 23, as this is indicated by the arrows in Figure 2.
  • the coils of the compressed spring 23 get closely packed against the wall 4 of the rotating spray arm 8 so as to substantially prevent the water from flowing from the passage 22 of the pan-like member to the chamber 19, thereby practically shutting off the same passage 22.
  • the water that is delivered to the inlet port 16 of the rotating spray arm 8 is only able to operate the main nozzles 10 by flowing directly into the chamber 18 situated upstream of the pan-like member 21, as this is indicated by the arrows in Figure 3.
  • the operation of the dishwashing machine illustrated by way of example in Figure 1 can at this point be inferred easily.
  • the pump 13 can be operated normally to supply the rotating spray arms 8, 9 with water having its afore cited higher pressure value.
  • the main nozzles 10 will be operated in both rotating spray arms in this case, and the same main nozzles 10 will, in the example described herein, release respective water spray jets that are directed upwards in order to wet the washload items arranged in both racks 6, 7 from below.
  • the main nozzles 10 will be still in action in the lower rotating spray arm 9 (in which no auxiliary nozzles are provided, actually), whereas only the auxiliary nozzles 12 will be able to be in action in the upper rotating spray arm 8.
  • the arrangement of main nozzles and/or auxiliary nozzles in the rotating spray arms 8, 9 may be combined in any different manner, according to the actual requirements, just as the orientation of the nozzles themselves may be different as well.
  • the commutator means 20-23 may comprise per sè known (and not shown) sealing means in view of ensuring an improved water sealing effect in the various flow-diverting or shut-off positions thereof.
  • the present invention may be advantageously applied also to a dishwashing machine in which the rotating spray arms 8, 9 are supplied alternately, as described for instance in EP-B-0 237 994.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)

Claims (4)

  1. Geschirrspülmaschine, welche einen Spülbehälter umfasst, in welchem mindestens ein Gestell zur Aufnahme der zu spülenden Gegenstände sowie Sprüharme untergebracht sind, welche mindestens eine Hauptdüse und mindestens eine Hilfsdüse aufweisen, die so ausgelegt sind, dass sie die zugehörigen Wassersprühstrahlen abgeben, wobei diese Sprüharme (8) Umschaltmittel (20-23) umfassen, welche so ausgelegt sind, dass die genannte Hauptdüse (10) oder die genannte Hilfsdüse (12) auf selektive Weise mit unter Druck stehendem Wasser beaufschlagt werden kann, wobei die genannten Sprüharme mindestens eine Einlassöffnung umfassen, der das genannte, unter Druck stehende Wasser zugefügt werden kann, wobei die genannten Umschaltmittel (20-23) so ausgelegt sind, dass sie auf selektive Weise die genannte Hauptdüse (10) oder die genannte Hilfsdüse (12) mit der genannten Einlassöffnung (16) des Sprüharmes (8) verbinden, dadurch gekennzeichnet dass die genannten Umschaltmittel (20-23) so ausgelegt sind, dass sie durch das Wasser, welches dem Sprüharm (8) zugeführt wird, hydraulisch betätigt werden.
  2. Geschirrspülmaschine gemäß Anspruch 1, dadurch gekennzeichnet, dass das Innere des Sprüharmes (8) unterteilt ist in eine erste Kammer (18), welche mit der genannten Hauptdüse (10) verbunden ist, und eine zweite Kammer (19), welche mit der genannten Hilfsdüse (12) verbunden ist, wobei die Umschaltmittel ein bewegliches schalenförmiges Teil (21) umfassen, welches durch eine Feder (23) belastet wird und so ausgelegt ist, dass es ermöglicht, dass die Einlassöffnung (16), wenn die Letztere mit Wasser unter niedrigerem Druckwert gespeist wird, nur mit der zweiten Kammer (19) verbunden wird, wobei das genannte schalenförmige Teil (21) so ausgelegt ist, dass es sich durch Überwinden der Kraft der Feder (23) so bewegen kann, dass ermöglicht wird, dass die Einlassöffnung (16), wenn die Letztere mit Wasser unter einem höheren Druckwert gespeist wird, nur mit der ersten Kammer (18) verbunden wird.
  3. Geschirrspülmaschine gemäß Anspruch 2, dadurch gekennzeichnet, dass, wenn die Einlassöffnung (16) mit Wasser gespeist wird, welches unter dem genannten niedrigeren Druck steht, die genannte Öffnung (16) mit der genannten zweiten Kammer (19) über einen Durchlass (22) verbunden wird, welcher im genannten schalenförmigen Teil (21) vorhanden ist, und durch die aufgeweiteten Windungen der genannten Feder (23) hindurch verbunden wird.
  4. Geschirrspülmaschine gemäß Anspruch 3, dadurch gekennzeichnet, dass, wenn die Einlassöffnung (16) mit Wasser gespeist wird, welches unter dem genannten höheren Druck steht, die genannte Öffnung (16) mit der genannten ersten Kammer (18) auf der Anströmseite des schalenförmigen Teil (21) verbunden wird, dessen Durchlass (22) durch die zusammengedrückten Windungen der genannten Feder (23) im Wesentlichen verschlossen wird.
EP00102536A 1999-03-29 2000-02-07 Geschirrspülmaschine mit Sprüharmen Revoked EP1040787B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999PN000033A IT1311215B1 (it) 1999-03-29 1999-03-29 Lavastoviglie con mezzi di spruzzatura perfezionati
ITPN990033 1999-03-29

Publications (2)

Publication Number Publication Date
EP1040787A1 EP1040787A1 (de) 2000-10-04
EP1040787B1 true EP1040787B1 (de) 2006-05-31

Family

ID=11395510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00102536A Revoked EP1040787B1 (de) 1999-03-29 2000-02-07 Geschirrspülmaschine mit Sprüharmen

Country Status (4)

Country Link
EP (1) EP1040787B1 (de)
DE (1) DE60028277T2 (de)
ES (1) ES2265815T3 (de)
IT (1) IT1311215B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9386903B2 (en) 2011-09-22 2016-07-12 Whirlpool Corporation Dishwasher with spray system
US9414736B2 (en) 2011-09-22 2016-08-16 Whirlpool Corporation Dishwasher with directional spray
US11160433B2 (en) 2020-01-22 2021-11-02 Haier Us Appliance Solutions, Inc. Dishwashing appliance having a multi-zone spray assembly to alternate the spray of wash fluid

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10134917B4 (de) * 2001-07-18 2006-03-16 AEG Hausgeräte GmbH Geschirrspülmaschine mit veränderbarer Flüssigkeitsverteilung
US7445013B2 (en) 2003-06-17 2008-11-04 Whirlpool Corporation Multiple wash zone dishwasher
DE10355343B3 (de) * 2003-11-25 2005-04-07 Miele & Cie. Kg Geschirrspülmaschine mit einer Umwälzpumpe
DE102004018878B4 (de) * 2004-04-15 2006-01-05 Miele & Cie. Kg Geschirrspülmaschine mit einem Spülbehälter in dem wenigstens ein Sprüharm angeordnet ist
ITMI20051770A1 (it) * 2005-09-22 2007-03-23 Comenda Ali S P A Gruppo di lavaggio
US9259138B2 (en) 2010-12-07 2016-02-16 Whirlpool Corporation Dishwasher with auxiliary spray system having removable sprayers
DE102011002938B4 (de) * 2011-01-20 2016-06-09 BSH Hausgeräte GmbH Geschirrspülmaschine mit zumindest einem rotierbaren Sprüharm
US9492055B2 (en) 2011-09-22 2016-11-15 Whirlpool Corporation Dishwasher with spray system
US9693672B2 (en) 2011-09-22 2017-07-04 Whirlpool Corporation Dishwasher with sprayer
US9119517B2 (en) 2011-10-17 2015-09-01 Whirlpool Corporation Dishwasher having spray manifold and method for controlling same
KR101860717B1 (ko) * 2012-01-06 2018-05-24 삼성전자주식회사 노즐 어셈블리와 이를 구비한 식기 세척기
EP2939585B1 (de) * 2012-12-28 2017-09-20 Whirlpool EMEA S.p.A Geschirrreinigungsverfahren
ITPR20120092A1 (it) * 2012-12-28 2014-06-29 Indesit Co Spa Metodo di lavaggio di stoviglie.
US9295368B2 (en) 2013-03-01 2016-03-29 Whirlpool Corporation Dishwasher with hydraulically driven sprayer
US9532701B2 (en) * 2013-03-01 2017-01-03 Whirlpool Corporation Dishwasher with sprayer
US9713413B2 (en) 2013-07-01 2017-07-25 Whirlpool Corporation Dishwasher for treating dishes
US9532699B2 (en) 2013-07-15 2017-01-03 Whirlpool Corporation Dishwasher with sprayer
US10076224B2 (en) 2014-01-20 2018-09-18 Whirlpool Corporation Dishwasher
CN106913297B (zh) 2015-02-02 2020-03-20 Lg电子株式会社 洗碗机
WO2017088935A1 (en) * 2015-11-27 2017-06-01 Electrolux Appliances Aktiebolag Flow control arrangement and dishwasher comprising a flow control arrangement
TR201615841A2 (tr) * 2016-11-07 2018-05-21 Arcelik As Su tüketi̇mi̇ azaltilan bi̇r bulaşik maki̇nasi
DE102017207990B4 (de) * 2017-05-11 2020-07-30 Haier Deutschland GmbH Schaltbarer Flüssigkeitsausbringer mit Federelement
TR201717501A2 (tr) * 2017-11-08 2019-05-21 Arcelik As Bi̇r bulaşik maki̇nasi
US11147430B2 (en) 2019-03-27 2021-10-19 Midea Group Co., Ltd. Dishwasher including rack corner sprayers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7024995U (de) * 1970-07-03 1971-03-11 Robert Bosch Gmbh Geschirrspülmaschine
DE3830717C3 (de) * 1988-09-09 1997-01-23 Aeg Hausgeraete Gmbh Steuerung für eine Sprüheinrichtung in einer Geschirrspülmaschine
IT1268535B1 (it) * 1993-12-20 1997-03-04 Zanussi Elettrodomestici Programma operativo per macchina lavastoviglie
IT1282596B1 (it) * 1996-02-09 1998-03-31 Candy Spa Lavastoviglie con spruzzatore rotante a ugelli irroratori selettivamente alimentati e relativo metodo di lavaggio
DE19736919B4 (de) * 1997-08-25 2007-08-09 AEG Hausgeräte GmbH Geschirrspülmaschine mit mindestens einer Spülebene

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9386903B2 (en) 2011-09-22 2016-07-12 Whirlpool Corporation Dishwasher with spray system
US9414736B2 (en) 2011-09-22 2016-08-16 Whirlpool Corporation Dishwasher with directional spray
US11160433B2 (en) 2020-01-22 2021-11-02 Haier Us Appliance Solutions, Inc. Dishwashing appliance having a multi-zone spray assembly to alternate the spray of wash fluid

Also Published As

Publication number Publication date
DE60028277D1 (de) 2006-07-06
ITPN990033A0 (it) 1999-03-29
ES2265815T3 (es) 2007-03-01
DE60028277T2 (de) 2007-05-10
EP1040787A1 (de) 2000-10-04
ITPN990033A1 (it) 2000-09-29
IT1311215B1 (it) 2002-03-04

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