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EP0976359B1 - Vorrichtung zum Filtern von Waschflüssigkeit in einem Geschirrspüler - Google Patents

Vorrichtung zum Filtern von Waschflüssigkeit in einem Geschirrspüler Download PDF

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Publication number
EP0976359B1
EP0976359B1 EP19980830456 EP98830456A EP0976359B1 EP 0976359 B1 EP0976359 B1 EP 0976359B1 EP 19980830456 EP19980830456 EP 19980830456 EP 98830456 A EP98830456 A EP 98830456A EP 0976359 B1 EP0976359 B1 EP 0976359B1
Authority
EP
European Patent Office
Prior art keywords
chamber
liquid
filtering
wash compartment
filtering elements
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
EP19980830456
Other languages
English (en)
French (fr)
Other versions
EP0976359A1 (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 DE1998627378 priority Critical patent/DE69827378T2/de
Priority to EP19980830456 priority patent/EP0976359B1/de
Publication of EP0976359A1 publication Critical patent/EP0976359A1/de
Application granted granted Critical
Publication of EP0976359B1 publication Critical patent/EP0976359B1/de
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
    • A47L15/42—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 device for fine filtering the washing liquid in a dishwasher, comprising a wash compartment to contain the objects to be washed, a pump for re-circulating the liquid by collecting it from the bottom of the wash compartment and admitting it into the latter by means of a plurality of nozzles, a drainage pump to drain the liquid out of the wash compartment at the end of the washing and/or rinsing cycle, the said bottom of the wash compartment including a primary grille and a perforated vessel in order to allow the liquid to pass through to the said re-circulation pump but retain the large particles of dirt removed from the objects to be washed.
  • a device for filtering the washing liquid in a dishwasher according to the preamble of claims is known for example from EP-A-0 454 640.
  • washing liquid means any solution with detergent which can be used in a dishwasher during the actual washing stages, as well as the water used during the rinsing stages which follow and which are interspersed with the washing stages.
  • the object of the present invention is to provide a filtering device which permits elimination as far as possible of all the residues and dirt from the washing liquid during recycling of the latter.
  • 1 indicates the wash compartment of a conventional dishwasher, equipped with at least two drawers 2 and 3 to accommodate the dishes to be washed and at least two impellers 4 and 5, each of which is provided with nozzles, indicated schematically as 6, in order to spray the washing or rinsing liquid-according to the stage of the cycle - against the objects to be washed.
  • the impellers 4 and 5 are conventionally mounted such that they are free to rotate on respective support columns 7 and 8.
  • the bottom 9 of the wash compartment 1 is provided with a primary grille 10, in the centre of which there is a perforated vessel 11 which can be extracted manually.
  • the grille 10 and the vessel 11 each have holes which permit the washing or rinsing liquid to pass but retain the large particles of food residues which are removed from the objects during the washing stage.
  • the device Positioned below the primary grille 10, the device according to the invention comprises a first chamber 12 which, via the annular aperture 13, communicates with a second chamber 14 located concentrically to the vessel 11.
  • This chamber 14 has a cylindrical wall 15 whose inner surface is covered by a filtering element 16 containing holes which are relatively small compared with those of the primary grille 10.
  • This latter filtering element 16 is such that it blocks the passage of very fine particles of dirt which would otherwise remain in suspension in the washing water, but still permits adequate passage of the flow of water.
  • the overall area of the through holes in the filtering element 16 is essentially the same as the total area of the holes in the primary grille 10.
  • the overall surface area of the filtering element 16 is essentially half the size of the surface area of the said primary grille.
  • the device comprises a third chamber 17, which extends axially as far as the wall 18 which constitutes the bottom of the first chamber 12, with which wall it is connected in a sealed manner.
  • connection is provided by means of an annular seal 19 which is inserted between a collar 20, which is integral with the wall 18, and an opposing collar 21, which is integral with the wall 22 constituting the periphery of the chamber 17.
  • the third chamber 17 is connected, via the aperture 23, to the suction duct 24 of the re-circulation pump 25, the delivery unit of which (not shown) supplies the nozzles 6 on the impellers 4 and 5 in a known and conventional manner.
  • the bottom 26 of the second chamber 14 is provided with a passage 27 which puts the chamber into communication with the suction duct 28 of the drainage pump 29, the delivery unit 30 of which discharges into the drains.
  • the bottom 26 is also provided with a nozzle 31 which is permanently connected to the water supply coming from the water mains by means of an on/off solenoid valve 32 which is controlled by the operating cycle of the dishwasher.
  • the nozzle 31 is positioned on the bottom 26, in a position co-axial to the chamber 14 and to the vessel 11, so as to convey its jet against the filtering cylindrical surface 16 of the chamber 14 and against the said vessel.
  • the wall 18, which constitutes the bottom of the first chamber 12 contains calibrated holes 33 which keep the said chamber 12 constantly in communication with the third chamber 17 so that part, even if only a small part, of the water circulating reaches the pump 25 directly.
  • the discharge pump 29 can be activated, discharging the amount of liquid present in the wash compartment 1.
  • the liquid is also forced to pass from the chamber 17 into the second chamber 14, passing through the filtering elements 16 in the opposite direction to that of re-circulation, thereby cleaning the filtering elements 16.
  • the jet of clean water from the nozzle 31 contributes to the washing in counter-current of the filtering elements 16, and also of the vessel 11.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Claims (6)

  1. Vorrichtung zum Feinfiltern der Waschflüssigkeit in einem Geschirrspüler, aufweisend einen Waschraum (1), um die Objekte, die gewaschen werden sollen, aufzunehmen, eine Pumpe (25) zum Rezirkulieren der Flüssigkeit durch Sammeln dieser von dem Boden (9) des Waschraums (1) und Einlassen von dieser in den letzteren mittels einer Vielzahl von Düsen (6), eine Ablasspumpe (29), um die Flüssigkeit von dem Waschraum an dem Ende des Wasch- und/oder Spülzyklus abzulassen, wobei der Boden (9) des Waschraums (1) ein erstes Gitter (10) und ein perforiertes Gefäß (11) umfasst, um zu ermöglichen, dass die Flüssigkeit durch die Rezirkulationspumpe hindurchführt, allerdings die großen Schmutzteilchen, entfernt von den Objekten, die gewaschen werden sollen, zurückgehalten werden, wobei die Vorrichtung, zum Sammeln der Flüssigkeit von dem Boden (9) des Waschraums (1), eine erste Kammer (12), positioniert unterhalb des ersten Gitters (10) und zumindest teilweise das perforierte Gefäß (11) umgebend, eine zweite Kammer (14), die frei mit der ersten Kammer (12) in Verbindung steht, eine dritte Kammer (17), die einerseits mit der zweiten Kammer (14) und andererseits mit dem Saugkanal (24) der Rezirkulationspumpe (25) in Verbindung steht, aufweist, dadurch gekennzeichnet, dass die zweite Kammer (14) Filterelemente (16) enthält, die so ausgelegt sind, um feine Teilchen von Schmutz zurückzuhalten, wobei die dritte Kammer (17) mit der zweiten Kammer (14) um die Filterelemente (16) herum in Verbindung steht, und dass die zweite Kammer (14) auch mit dem Saugkanal (28) der Ablasspumpe (29) über Öffnungen (27) ohne Filterelemente in Verbindung steht.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der gesamte Bereich der Löcher für den Durchgang der Flüssigkeit durch das Filterelement (16) im Wesentlichen derselbe wie der gesamte Bereich der Löcher in dem ersten Gitter (10) ist, wobei der gesamte Oberflächenbereich des Filterelements (16) im Wesentlichen von der Hälfte der gesamten Größe des Oberflächenbereichs des ersten Gitters (10) ist.
  3. Vorrichtung nach Anspruch 1 und 2, dadurch gekennzeichnet, dass die zweite Kammer (14) zylindrisch ist und zumindest teilweise konzentrisch zu dem ersten, perforierten Gefäß (11) positioniert ist, wobei die Filterelemente (16) innerhalb der Kammer (14), an der zylindrischen Wand (15) der letzteren, angeordnet sind.
  4. Vorrichtung nach Anspruch 1 und 3, dadurch gekennzeichnet, dass die dritte Kammer (17) ähnlich eines Rings um die zweite Kammer (14) herum, um die zylindrische Wand (15) herum, die die Filterelemente (16) enthält, positioniert ist.
  5. Vorrichtung nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, dass die erste Kammer (12) kalibrierte Durchgangswege (33) enthält, die sich direkt innerhalb der dritten Kammer (17) öffnen.
  6. Vorrichtung nach den Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die zweite Kammer (14) mit einer Düse (31) versehen ist, die mit der Wasserversorgungsleitung verbunden ist, um sauberes Wasser zum Waschen der Filterelemente (16), in Verbindung mit dem Betrieb der Ablasspumpe (29), einzulassen.
EP19980830456 1998-07-28 1998-07-28 Vorrichtung zum Filtern von Waschflüssigkeit in einem Geschirrspüler Expired - Lifetime EP0976359B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1998627378 DE69827378T2 (de) 1998-07-28 1998-07-28 Vorrichtung zum Filtern von Waschflüssigkeit in einem Geschirrspüler
EP19980830456 EP0976359B1 (de) 1998-07-28 1998-07-28 Vorrichtung zum Filtern von Waschflüssigkeit in einem Geschirrspüler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19980830456 EP0976359B1 (de) 1998-07-28 1998-07-28 Vorrichtung zum Filtern von Waschflüssigkeit in einem Geschirrspüler

Publications (2)

Publication Number Publication Date
EP0976359A1 EP0976359A1 (de) 2000-02-02
EP0976359B1 true EP0976359B1 (de) 2004-11-03

Family

ID=8236728

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980830456 Expired - Lifetime EP0976359B1 (de) 1998-07-28 1998-07-28 Vorrichtung zum Filtern von Waschflüssigkeit in einem Geschirrspüler

Country Status (2)

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EP (1) EP0976359B1 (de)
DE (1) DE69827378T2 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005008987B3 (de) 2005-02-28 2006-06-01 Meiko Maschinenbau Gmbh & Co.Kg Mehrtankgeschirrspülmaschine mit Rückspülvorrichtung
DE102007007134A1 (de) 2007-02-13 2008-08-14 Meiko Maschinenbau Gmbh & Co.Kg Filter für Reinigungsmaschinen
KR100856782B1 (ko) 2007-08-10 2008-09-05 엘지전자 주식회사 필터조립체 및 이를 구비한 식기세척기
KR102379020B1 (ko) * 2013-12-31 2022-03-28 삼성전자주식회사 식기 세척기 및 그 제어방법
EP3366186B1 (de) * 2017-02-27 2022-03-02 Electrolux Professional S.p.A. Geschirrspülmaschine
JP6994625B2 (ja) * 2017-08-08 2022-01-14 パナソニックＩｐマネジメント株式会社 食器洗い機

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT211726Z2 (it) * 1987-04-08 1989-04-07 Zanussi Elettrodomestici Macchina lavastoviglie con filtro di ricircolo atupoulente.
SE500246C2 (sv) * 1990-04-26 1994-05-24 Electrolux Ab Anornding vid en diskmaskin
IT1276119B1 (it) * 1995-11-14 1997-10-24 Candy Spa Ciclo di lavaggio per macchina lavatrice

Also Published As

Publication number Publication date
DE69827378T2 (de) 2005-11-24
DE69827378D1 (de) 2004-12-09
EP0976359A1 (de) 2000-02-02

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