EP0990413B1 - Verfahren und vorrichtung zum Filtrieren von Wasch- und/oder Spülflüssigkeit in einer Geschirrspülmaschine - Google Patents

Verfahren und vorrichtung zum Filtrieren von Wasch- und/oder Spülflüssigkeit in einer Geschirrspülmaschine Download PDF

Info

Publication number
EP0990413B1
EP0990413B1 EP98830569A EP98830569A EP0990413B1 EP 0990413 B1 EP0990413 B1 EP 0990413B1 EP 98830569 A EP98830569 A EP 98830569A EP 98830569 A EP98830569 A EP 98830569A EP 0990413 B1 EP0990413 B1 EP 0990413B1
Authority
EP
European Patent Office
Prior art keywords
flow
washing liquid
tank
filtering
additional
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
EP98830569A
Other languages
English (en)
French (fr)
Other versions
EP0990413A1 (de
Inventor
Silvano Fumagalli
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.)
Candy SpA
Original Assignee
Candy 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
Application filed by Candy SpA filed Critical Candy SpA
Priority to DE1998620625 priority Critical patent/DE69820625T2/de
Priority to EP98830569A priority patent/EP0990413B1/de
Publication of EP0990413A1 publication Critical patent/EP0990413A1/de
Application granted granted Critical
Publication of EP0990413B1 publication Critical patent/EP0990413B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • A47L15/4202—Water filter means or strainers
    • A47L15/4208—Arrangements to prevent clogging of the filters, e.g. self-cleaning
    • 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
    • A47L15/4202—Water filter means or strainers
    • A47L15/4206—Tubular filters

Definitions

  • the present invention relates to a method of filtering the washing liquid in a dishwasher comprising a tank for holding the items to be washed, the flow of washing liquid being drawn from the tank by a main recycling pump drawing from the bottom of the tank and being admitted to the tank through a plurality of spray nozzles for a predetermined period of time, the flow being passed through a circuit comprising a primary screen disposed in the bottom of the tank and a perforated basket for retaining the large particles of dirt removed from the items to be washed, and a chamber disposed beneath the primary screen, at least partially surrounding the perforated basket, and having a filtering element for retaining fine dirt particles.
  • the invention also relates to apparatus for implementing the method.
  • washing liquid is intended to define in the following description any solution with detergent for use in a dishwasher during the actual washing stages as well as the water used during the rinsing stages which take place after and between the washing stages.
  • dishwashers of the type mentioned above provide for various operating cycles to be selected by the user according to the amount of food residues present on the dishes, this definition including plates, glasses, cutlery, pots and kitchen utensils.
  • the primary screen and the perforated basket in the bottom of the tank can retain the larger particles of dirt and the other smaller particles are retained by the further filtering means commonly known as micro-filters, a quantity of finely reduced and pulverized particles continues to be passed through the tank.
  • a filter for filtering the washing liquid in a dishwasher of the above specified type, a filter is installed at the inlet conduit connected to the main recycling pump. Said filter has meshes that are increasingly smaller the more the washing liquid is subjected to recycling, in order to trap the greatest amount of dirt that is in suspension in the washing liquid itself, avoiding at the same time that such dirt, being less diluted, obstruct either the inlet or the outlet conduit of the washing pump. It is thus indispensable to clean the filter periodically.
  • the filter is cleaned by means of a cleaning step at the end of the wash cycle, wherein this cleaning step comprises at least one substep for supplying clean water and part of this clean water is not discharged but reused in a subsequent washing cycle.
  • US 4346723 describes a dishwasher having a wash chamber for containing the items to be cleaned, a main circuit operated by a recycling pump and a soil collecting circuit with a drain pump.
  • the soil collecting circuit includes a soil collector body attached to the underside of the wash chamber bottom and a fine mesh cylindrical screen, mounted between the soil collector body interior and an upward opening into the wash chamber.
  • the interior of the collector body and the fine mesh screen define a soil collecting compartment for separating the food soil debris from the washing liquid.
  • a drain pump discharges the washing liquid through a fluid inlet conduit and outlet conduit of the collector body, carrying the collected soil out the drain. Since it is to be expected that there will remain nevertheless some food soil debris in the washing liquid, a relatively fine filter must be provided in the fluid inlet path for the recycling pump and the spray arms. Otherwise the food soil debris would lead to clogging of the recycling pump and he spray arms.
  • EP0976359 represents an example of a technical solution to the problem inherent in the filtration of the washing and/or rinsing liquid in dishwashers, although this is also not free of problems such as limited filtration efficiency and the risk of rapid clogging of the micro-filter surfaces disposed in the main circuit of the washing liquid.
  • the entire quantity of washing liquid circulated by the main recycling pump is filtered during the working cycles as it passes from the tank to the filtering members and from these back into the tank.
  • the particles which are not retained by the filtering members therefore continue to circulate together with the washing liquid during the working stages with the risk that even the fine particles retained by the filtering members may be detached therefrom and go back into circulation.
  • a filtering method according to the preamble of claim 1 is known from US 5,601,660.
  • the object of the present invention is to provide a filtering method which as far as possible eliminates all of the residues and dirt from the washing liquid during the circulation thereof, also avoiding the risk of premature clogging of the filtering members fitted in the working circuit for the flow of washing liquid.
  • the washing tank of a conventional dishwasher is indicated as 1 and is equipped with at least two baskets 2 and 3 for the arrangement, in conventional manner, of the dishes to be washed, and at least two rotors 4 and 5 each having nozzles, schematically indicated 6, for spraying the washing liquid, according to the stage of the cycle, against the items to be washed, not shown in the drawings.
  • the rotors 4 and 5 are freely rotatable on respective support pillars 7 and 8, in conventional manner.
  • the bottom 9 of the tank 1 has a primary screen 10 in the centre of which there is a perforated basket 11 which can be removed manually.
  • the primary screen 10 and the basket 11 have respective holes through which the washing liquid can pass and which can retain the large particles of food residues which are removed from the items during washing.
  • the apparatus In a position below the primary screen 10, the apparatus comprises a first chamber 12 which communicates axially, by means of an annular opening 13, with a further chamber which will be referred to further below.
  • a second chamber 14 is arranged concentrically with the basket 11 and with the first chamber 12.
  • the chamber 14 has a cylindrical wall 15 with an inner surface covered by a filtering element 16. This filtering element 16 blocks the passage of very fine dirt particles which would otherwise remain in suspension in the washing water.
  • the apparatus has a third chamber 17 which extends axially as far as the wall 18 constituting the base of the first chamber 12, with which the third chamber 17 communicates via the aforementioned annular opening 13.
  • connection with the wall 18 is formed, in the embodiment illustrated, by means of an annular seal 19 inserted between a collar 20 fixed to the wall 18 and an opposed collar 21 fixed to the wall 22 which constitutes the periphery of the chamber 17.
  • the third chamber 17 is connected by means of an opening 23 to the intake duct 24 of the main recycling pump 25 of which the output, not shown, supplies the nozzles 6 on the rotors 4 and 5 in known and conventional manner.
  • the base 26 of the second chamber 14 has a duct 27 which puts the chamber 14 into communication with the intake duct 28 of a pump 29 which has an output 30 and which, as will be explained below, can act as a drain pump and, alternatively, as a further recycling pump, in the implementation of the filtration method of the present invention.
  • the base 26 also has a nozzle 31 connected permanently to the water supply coming from the water mains, by means of an on/off solenoid valve 32 disposed in a pipe 33 and controlled by the operating cycle of the dishwasher.
  • the nozzle 31 is positioned on the base 26 in a position coaxial with the chamber 14 and with the basket 11 so as to direct its jet against the cylindrical filtering surface of the filtering element 16 of the chamber 14 and against the basket (11).
  • the apparatus comprises an additional filtering member 34 having, in its interior, filtering walls 35 with filtering elements for retaining very fine dirt particles.
  • the filtering member 34 is positioned vertically adjacent the rear wall of the tank 1 and is connected to the output 30 of the pump 29 by means of a pipe 36.
  • the outlet pipe 37 of the filtering member 34 opens directly into the tank 1 in the vicinity of the bottom 9.
  • the pipe 36 may be reversed towards the drain as indicated schematically at 36a.
  • washing liquid is re-admitted directly to the tank 1 through the pipe 37.
  • This additional filtration step performed on a portion of the total flow of washing liquid lightens the work of the filtering element 16 of the chamber 14 which, in contrast, is struck by the entire flow of washing liquid throughout the working cycle.
  • the result is more effective washing by the dishwasher.
  • the additional filtration step by means of the filtering member 34 may take place periodically during corresponding pauses of the main recycling pump 25, that is, during pauses in the working cycle.
  • the pump 29 can be operated as a drain pump and the washing liquid can be directed towards the end 36a of the pipe 36 opening outside the filtering member 34.
  • Clean water can advantageously be admitted to the second chamber 14 through the nozzle 31 during the drain stage by a suitable command imparted to the solenoid valve 32 by the cycle control.
  • the j et of clean water from the nozzle 31 helps to wash the filtering element 16 and also the basket 11 with a counter-flow.
  • the filtering member 34 in the embodiment shown in Figures 2 and 3 comprises a three-way valve 38 which enables the pipe 37a to be put into communication with the annular inner portion 39 of the filtering member 34, where the washing liquid filtered by the filtering walls 35 collects, as shown in Figure 2, or with the axial inner chamber 40, as shown in Figure 3.
  • valve 38 enables the additional filtering member 34 to be washed by a counter-flow, removing the impurities retained by the filtering walls 35.
  • clean water may be admitted not only through the nozzle 31 but also directly into the filtering member 34 through an additional nozzle 41.
  • the apparatus of Figures 2 and 3 comprises a further pump 42 for draining the washing liquid.
  • This pump 42 is connected to the chamber 14 by an intake duct 43 via the duct 27 formed in the base 26 of the chamber 14.
  • the filtration method also comprises a step in which a portion of the flow coming from the tank 1 is drawn off by the pump 29 during the execution of a working cycle in which the main recycling pump 25 is active, and is sent, via the duct 30, to the additional filtering member 34.
  • the said portion of the flow is made to join the main flow in the chamber 17 which is directly in communication with the duct 28.
  • the filtration step performed by the pump 29 with the additional filtering member 34 may take place simultaneously with the operation of the working cycle implemented by the main recycling pump 25, or during predetermined pauses thereof.
  • the additional filtering member 34a is constituted by a structure comprising a primary screen 10a, a perforated basket 11a, a chamber 14a with a filtering wall 15a, with a base 26a, and ducts 27a formed therein.
  • the structure of the additional filtering member is disposed beneath the bottom 9 of the tank 1 in a position adjacent the main filtering structure 11,15 associated with the primary screen 10.
  • This structure further comprises a chamber 17a which is not described further since it has characteristics similar to those of the chamber 17.
  • a nozzle 31a is provided for performing the washing of the additional filtering member 34a and this nozzle is disposed in the base 26a of the additional filtering member 34a.
  • the chamber 14a is put into communication with a manifold 28a which leads into the pump 29a, corresponding to the pump 29 of the embodiments described above, into which the duct 28 coming from the main filtering member also leads.
  • the output 30a of the pump 29a is connected to a three-way valve 38a which, in a first position, puts the pump 29a into communication with a duct 37b which, in the embodiment illustrated, opens directly into the washing tank 1 in the vicinity of the bottom 9 thereof.
  • valve 38a puts the pump 29a into communication with a pipe 44a leading to the outlet, as shown in Figure 5.
  • This position of the valve 38a is used during the washing of the filters 16, 15a when clean water is admitted through the nozzles 31 and 31a respectively.
  • the filtration method implemented by the apparatus of Figures 4 and 5 corresponds substantially to that implemented by the apparatus shown in Figure 1, in which the washing liquid coming out of the additional filtering member 34a is admitted directly to the tank 1.
  • the result of an ability to perform washing and rinsing cycles in a dishwasher with circulating washing liquids which are substantially free of dirt particles in suspension is thus achieved.

Claims (13)

  1. Verfahren zum Filtern der Wasch- und/oder Spülflüssigkeit in einem Geschirrspüler, der einen Behälter (1) zum Aufnehmen der zu waschenden Gegenstände umfasst, wobei der Strom von Waschflüssigkeit aus dem Behälter (1) durch eine Haupt-Umwälzpumpe (25) gesaugt wird, die vom Boden (9) des Behälters (1) absaugt, und über eine Vielzahl von Sprühdüsen (6) über einen vorgegebenen Zeitraum in den Behälter (1) eingeleitet wird, und der Strom durch einen Kreislauf geleitet wird, der ein Primär-Sieb (10), das sich im Boden (9) des Behälters (1) befindet, und einen perforierten Korb (11), wobei beide dazu dienen, die großen Schmutzteilchen, die von den zu waschenden Gegenständen entfernt werden, zurückzuhalten, und eine Kammer (14) umfasst, die sich unterhalb des Primär-Siebes (10) befindet und den perforierten Korb (11) wenigstens teilweise umgibt, und die Kammer (14) ein Filterelement (16) zum Zurückhalten feiner Schmutzteilchen aufweist, wobei es einen Schritt einschließt, bei dem ein Teil des Stroms von Waschflüssigkeit an einem Punkt in dem Kreislauf stromab von dem Filterelement (16) und/oder dem Primär-Sieb (10) abgesaugt wird, wobei der abgesaugte Teil der Waschflüssigkeit zu einem zusätzlichen Filterelement (34, 34a) geleitet wird, um feine Schmutzteilchen zurückzuhalten, und der Teil nach dem Filtern zu dem Strom von Waschflüssigkeit zurückgeführt wird, dadurch gekennzeichnet, dass der Schritt mittels einer geeigneten Zusatzpumpe (29, 29A) ausgeführt wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Teil des Stroms von Waschflüssigkeit, der durch die Zusatzpumpe (29, 29a) abgesaugt wird, nach dem zusätzlichen Filtern in den Strom von Waschflüssigkeit zurückgeführt wird, der durch den Behälter (1) hindurchtritt, der die zu waschenden Gegenstände enthält.
  3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Teil des Stroms von Waschflüssigkeit, der durch die Zusatzpumpe (29, 29a) abgesaugt wird, nach zusätzlichem Filtern in die Waschflüssigkeit unmittelbar stromab von dem Punkt in dem Kreislauf zurückgeführt wird, an dem der Teil abgesaugt wurde.
  4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Schritt des Absaugens, des zusätzlichen Filterns und des Zurückführens des Teils des Stroms von Waschflüssigkeit in den Strom von Waschflüssigkeit gleichzeitig zum Umwälzen der Waschflüssigkeit stattfindet, das durch die Haupt-Umwälzpumpe (25) durchgeführt wird.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass der Schritt des Absaugens, des zusätzlichen Filterns und des Zurückführens des Teils des Stroms von Waschflüssigkeit in den Strom über intermittierende Zeiträume stattfindet, die kürzer sind als die durch die Haupt-Umwälzpumpe (25) eingesetzten.
  6. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Phase des Absaugens, des zusätzlichen Filterns und des Zurückleitens des abgesaugten Teils von Waschflüssigkeit während eines Stillstands der Haupt-Umwälzpumpe (25) stattfindet.
  7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass es einen Schritt einschließt, bei dem das zusätzliche Filterelement (34, 34a) in einem Gegenstrom ausgespült wird, wobei die verwendete Ausspülflüssigkeit ausserhalb des Behälters (1) abgeleitet wird.
  8. Vorrichtung zum Durchführen des Verfahrens nach einem der Ansprüche 1 bis 7, die einen Behälter (1) zum Aufnehmen der zu waschenden Gegenstände, eine Haupt-Umwälzpumpe (25) zum Absaugen des Stroms von Waschflüssigkeit vom Boden (9) des Behälters (1) und zum Einleiten desselben in den Behälter (1) über eine Vielzahl von Sprühdüsen (6) über einen vorgegebenen Zeitraum, ein Primär-Sieb (10), das sich im Boden (9) des Behälters (1) befindet, und einen perforierten Korb (11), wobei beide dazu dienen, die großen Schmutzteilchen zurückzuhalten, die von den zu waschenden Gegenständen entfernt werden, und eine Kammer (14) umfasst, die unterhalb des Primär-Siebes (10) angeordnet ist und den perforierten Korb (11) wenigstens teilweise umgibt, und die Kammer (14) ein Filterelement (16) zum Zurückhalten feiner Schmutzteilchen aufweist, und wobei sie ein zusätzliches Filterelement (34, 34a) zum Zurückhalten feiner Schmutzteilchen enthält, das stromab von dem Filterelement (16) und/oder dem Primär-Sieb (10) angeordnet ist, dadurch gekennzeichnet, dass sie eine Hilfspumpe (29, 29a) zum Absaugen eines Teils des Stroms von Waschflüssigkeit und zum Leiten desselben zu dem zusätzlichen Filterelement (34, 34a) sowie eine Einrichtung zum Zurückführen desselben zu dem Strom von Waschflüssigkeit enthält.
  9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass das zusätzliche Filterelement (34, 34a) Filterwände (15a, 35) zum Zurückhalten feiner Schmutzteilchen aufweist.
  10. Vorrichtung nach einem der Ansprüche 8 und 9, dadurch gekennzeichnet, dass sich das zusätzliche Filterelement (34a) unterhalb des Bodens (9) des Behälters (1) zum Aufnehmen der zu waschenden Gegenstände befindet.
  11. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass sich das zusätzliche Filterelement (34) an der hinteren vertikalen Seite des Behälters (1) zum Aufnehmen der zu waschenden Gegenstände befindet.
  12. Vorrichtung nach einem der Ansprüche 8 bis 11, dadurch gekennzeichnet, dass sie ein Ventil (38) zum Umkehren der Richtung des Stroms in dem zusätzlichen Filterelement (34) und zum Ausspülen desselben mit einem Gegenstrom enthält.
  13. Vorrichtung nach einem der Ansprüche 8 bis 12, dadurch gekennzeichnet, dass sie eine Düse (41, 31a) zum Zuführen von sauberem Wasser zum Ausspülen der zusätzlichen Filtereinrichtung (34,34a) von außen enthält.
EP98830569A 1998-09-29 1998-09-29 Verfahren und vorrichtung zum Filtrieren von Wasch- und/oder Spülflüssigkeit in einer Geschirrspülmaschine Expired - Lifetime EP0990413B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1998620625 DE69820625T2 (de) 1998-09-29 1998-09-29 Verfahren und vorrichtung zum Filtrieren von Wasch- und/oder Spülflüssigkeit in einer Geschirrspülmaschine
EP98830569A EP0990413B1 (de) 1998-09-29 1998-09-29 Verfahren und vorrichtung zum Filtrieren von Wasch- und/oder Spülflüssigkeit in einer Geschirrspülmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98830569A EP0990413B1 (de) 1998-09-29 1998-09-29 Verfahren und vorrichtung zum Filtrieren von Wasch- und/oder Spülflüssigkeit in einer Geschirrspülmaschine

Publications (2)

Publication Number Publication Date
EP0990413A1 EP0990413A1 (de) 2000-04-05
EP0990413B1 true EP0990413B1 (de) 2003-12-17

Family

ID=8236807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98830569A Expired - Lifetime EP0990413B1 (de) 1998-09-29 1998-09-29 Verfahren und vorrichtung zum Filtrieren von Wasch- und/oder Spülflüssigkeit in einer Geschirrspülmaschine

Country Status (2)

Country Link
EP (1) EP0990413B1 (de)
DE (1) DE69820625T2 (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10159022A1 (de) * 2001-11-30 2003-06-12 Krauss Maffei Kunststofftech Verfahren zum Herstellen eines Datenträgers aus zwei Halbseiten
DE102004062242A1 (de) 2004-12-23 2006-07-13 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes Haushaltsgerät und Verfahren zum Betreiben desselben
DE102005008987B3 (de) * 2005-02-28 2006-06-01 Meiko Maschinenbau Gmbh & Co.Kg Mehrtankgeschirrspülmaschine mit Rückspülvorrichtung
KR101241870B1 (ko) * 2005-12-09 2013-03-11 엘지전자 주식회사 식기 세척기
US8622065B2 (en) 2005-12-09 2014-01-07 Lg Electronics Inc. Dish washer
DE102007007134A1 (de) 2007-02-13 2008-08-14 Meiko Maschinenbau Gmbh & Co.Kg Filter für Reinigungsmaschinen
AU2011203005B2 (en) * 2007-08-08 2012-06-07 Electrolux Home Products Corporation N.V. Dishwasher
EP2359734A1 (de) * 2007-08-08 2011-08-24 Electrolux Home Products Corporation N.V. Geschirrspüler
DE102007061038B4 (de) * 2007-12-18 2016-10-27 BSH Hausgeräte GmbH Wasserführendes Haushaltsgerät
US8177915B2 (en) 2009-05-13 2012-05-15 Electrolux Home Products, Inc. Filtration system for a dishwasher, and associated apparatus and method
DE102010041930A1 (de) * 2010-10-04 2012-04-05 Dürr Ecoclean GmbH Vorrichtung und Verfahren zum Analysieren von Verschmutzung
EP2468170A1 (de) 2010-12-21 2012-06-27 Electrolux Home Products Corporation N.V. Tischplatten-Geschirrspüler
US20120318296A1 (en) * 2011-06-20 2012-12-20 Whirlpool Corporation Ultra micron filter for a dishwasher
KR102379020B1 (ko) * 2013-12-31 2022-03-28 삼성전자주식회사 식기 세척기 및 그 제어방법
US9968236B2 (en) * 2014-09-16 2018-05-15 Haier Us Appliance Solutions, Inc. Dishwasher appliance and a method for operating the same
CN111000515B (zh) * 2018-10-08 2024-03-19 统一品牌有限公司 流动转向器和篮框
US11325167B2 (en) 2018-10-08 2022-05-10 Unified Brands, Inc. Flow diverter and basket
DE102019205919B4 (de) 2019-04-25 2022-12-15 E.G.O. Elektro-Gerätebau GmbH Wasserführendes Haushaltsgerät und Verfahren zu seinem Betrieb

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5601660A (en) * 1995-09-19 1997-02-11 Lg Electronics Inc. Food debris filtering apparatus for dishwasher and method thereof
EP0774230A2 (de) * 1995-11-14 1997-05-21 CANDY S.p.A. Waschgänge für Waschmaschine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4346723A (en) * 1981-03-25 1982-08-31 Hobart Corporation Apparatus for a warewasher bypass soil collector
IT1187278B (it) * 1985-04-18 1987-12-23 Zanussi Elettrodomestici Macchina lavatrice in particolare lavastoviglie,provvista di filtro autopulente

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5601660A (en) * 1995-09-19 1997-02-11 Lg Electronics Inc. Food debris filtering apparatus for dishwasher and method thereof
EP0774230A2 (de) * 1995-11-14 1997-05-21 CANDY S.p.A. Waschgänge für Waschmaschine

Also Published As

Publication number Publication date
DE69820625D1 (de) 2004-01-29
DE69820625T2 (de) 2004-11-11
EP0990413A1 (de) 2000-04-05

Similar Documents

Publication Publication Date Title
EP0990413B1 (de) Verfahren und vorrichtung zum Filtrieren von Wasch- und/oder Spülflüssigkeit in einer Geschirrspülmaschine
US5097855A (en) Method for self-cleaning of a strainer system in a dishwasher and a dish-washer having means for carrying out the method
US4346723A (en) Apparatus for a warewasher bypass soil collector
US6156213A (en) Embedded spin-clean cartridge-type water filters
CN101902948B (zh) 洗碗机
US6782899B2 (en) Dishwasher
KR100529879B1 (ko) 식기세척기의 필터 청소장치
AU2009327568B2 (en) Pre-rinsing of dishes
US4468333A (en) Method for a warewasher bypass soil collector
KR100438270B1 (ko) 식기세척기
US8663393B2 (en) Water-conducting household appliance and method for the operation thereof
KR20100007340A (ko) 식기세척기
EP0976359B1 (de) Vorrichtung zum Filtern von Waschflüssigkeit in einem Geschirrspüler
EP1973459B1 (de) Geschirrspülmaschine
JP2595700B2 (ja) 食器洗浄機の運転方法
KR100267937B1 (ko) 식기세척기
CN111227755A (zh) 一种用于清洗机的节水装置
KR100269467B1 (ko) 일체형 펌프를 가진 식기세척기의 필터장치
KR100516706B1 (ko) 식기세척기
JP2660234B2 (ja) 食器類の洗浄機
KR970010424B1 (ko) 식기세척기의 미세필터 세척장치
WO2023234896A1 (en) A washing device comprising a filter cleaning assembly and a filter cleaning method
KR19980022732U (ko) 식기세척기의 필터막힘 방지장치
KR20100052212A (ko) 식기 세척기
KR20020047872A (ko) 식기세척기

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR IT

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

AKX Designation fees paid

Free format text: DE FR IT

17P Request for examination filed

Effective date: 20000918

17Q First examination report despatched

Effective date: 20011217

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR IT

REF Corresponds to:

Ref document number: 69820625

Country of ref document: DE

Date of ref document: 20040129

Kind code of ref document: P

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20040920

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20080911

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080829

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20080930

Year of fee payment: 11

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090930

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100401

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090929