EP0976359B1 - Dispositif de filtration du liquide de lavage dans un lave-vaisselle - Google Patents

Dispositif de filtration du liquide de lavage dans un lave-vaisselle 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
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German (de)
English (en)
Other versions
EP0976359A1 (fr
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/fr
Publication of EP0976359A1 publication Critical patent/EP0976359A1/fr
Application granted granted Critical
Publication of EP0976359B1 publication Critical patent/EP0976359B1/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
    • A47L15/42—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. Dispositif pour la filtration fine du liquide de lavage dans un lave-vaisselle, comportant un compartiment (1) de lavage destiné à contenir les objets devant être lavés, une pompe (25) destinée à la recirculation du liquide en le collectant depuis le fond (9) du compartiment de lavage (1) et en l'admettant dans ce dernier au moyen de plusieurs buses (6), une pompe (29) de vidange destinée à vidanger le liquide à l'extérieur du compartiment de lavage à la fin du cycle de lavage et/ou de rinçage, le fond (9) du compartiment (1) de lavage comprenant une grille principale (10) et un récipient perforé (11) pour permettre au liquide de passer dans la pompe de recirculation, tout en retenant les grosses particules de saleté enlevées des objets devant être lavés, ledit dispositif comportant, pour la collecte du liquide à partir du fond (9) du compartiment de lavage (1), une première chambre (12) positionnée en dessous de la grille principale (10) et entourant au moins partiellement le récipient perforé (11), une deuxième chambre (14) qui communique librement avec ladite première chambre (12), une troisième chambre (17) qui communique d'une part avec ladite deuxième chambre (14) et, d'autre part, avec le conduit (24) d'aspiration de la pompe de recirculation (25), caractérisé en ce que en ce que ladite deuxième chambre (14) contient des éléments filtrants (16) conçus pour retenir de fines particules de saleté, la troisième chambre (17) communiquant avec la deuxième chambre (14) autour desdits éléments filtrants (16), et en ce que ladite deuxième chambre (14) est également en communication avec le conduit d'aspiration (28) de ladite pompe de vidange (29) par l'intermédiaire d'ouvertures (27) dépourvues d'éléments filtrants.
  2. Dispositif selon la revendication 1, caractérisé en ce que l'aire globale des trous pour le passage du liquide à travers ledit élément filtrant (16) est essentiellement égale à l'aire globale des trous dans ladite grille principale (10), l'aire globale de la surface dudit élément filtrant (16) étant essentiellement égale à la moitié de la taille globale de l'aire de surface de ladite grille principale (10).
  3. Dispositif selon les revendications 1 et 2, caractérisé en ce que ladite deuxième chambre (14) est cylindrique et est au moins partiellement positionnée concentriquement audit récipient perforé (11), les éléments filtrants (16) étant placés à l'intérieur de la chambre (14) sur la paroi cylindrique (15) de cette dernière.
  4. Dispositif selon les revendications 1 et 3, caractérisé en ce que ladite troisième chambre (17) est positionnée à la manière d'un anneau autour de ladite deuxième chambre (14), autour de la paroi cylindrique (15) contenant lesdits éléments filtrants (16).
  5. Dispositif selon les revendications 1 à 4, caractérisé en ce que ladite première chambre (12) contient des passages calibrés (33) qui débouchent directement à l'intérieur de ladite troisième chambre (17).
  6. Dispositif selon les revendications 1 à 5, caractérisé en ce que ladite deuxième chambre (14) est pourvue d'une buse (31) qui est raccordée à l'eau courante pour admettre de l'eau propre pour le lavage desdits éléments filtrants (16), conjointement avec l'opération exécutée par ladite pompe de vidange (29).
EP19980830456 1998-07-28 1998-07-28 Dispositif de filtration du liquide de lavage dans un lave-vaisselle Expired - Lifetime EP0976359B1 (fr)

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 (fr) 1998-07-28 1998-07-28 Dispositif de filtration du liquide de lavage dans un lave-vaisselle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19980830456 EP0976359B1 (fr) 1998-07-28 1998-07-28 Dispositif de filtration du liquide de lavage dans un lave-vaisselle

Publications (2)

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

Family

ID=8236728

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980830456 Expired - Lifetime EP0976359B1 (fr) 1998-07-28 1998-07-28 Dispositif de filtration du liquide de lavage dans un lave-vaisselle

Country Status (2)

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EP (1) EP0976359B1 (fr)
DE (1) DE69827378T2 (fr)

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 (fr) * 2017-02-27 2022-03-02 Electrolux Professional S.p.A. Lave-vaisselle
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 (fr) 2000-02-02

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