EP0855165B1 - Vorrichtung zum Filtern in Geschirrspülwaschmaschinen - Google Patents

Vorrichtung zum Filtern in Geschirrspülwaschmaschinen Download PDF

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Publication number
EP0855165B1
EP0855165B1 EP19980830010 EP98830010A EP0855165B1 EP 0855165 B1 EP0855165 B1 EP 0855165B1 EP 19980830010 EP19980830010 EP 19980830010 EP 98830010 A EP98830010 A EP 98830010A EP 0855165 B1 EP0855165 B1 EP 0855165B1
Authority
EP
European Patent Office
Prior art keywords
filtering
filtering device
covering member
slots
cylindrical body
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
EP19980830010
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English (en)
French (fr)
Other versions
EP0855165A3 (de
EP0855165A2 (de
Inventor
Roberto Bertazzoni
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.)
Smeg SpA
Original Assignee
Smeg SpA
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Filing date
Publication date
Application filed by Smeg SpA filed Critical Smeg SpA
Publication of EP0855165A2 publication Critical patent/EP0855165A2/de
Publication of EP0855165A3 publication Critical patent/EP0855165A3/de
Application granted granted Critical
Publication of EP0855165B1 publication Critical patent/EP0855165B1/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 dishwashing machines for domestic use, and in particular to an improved filtering device to be used in said machines.
  • the filtering group generally includes a plane filter with a comparatively large-mesh net (1-2 mm.) located on the tank bottom and having a concave shape. Therefore this filter conveys a portion of the water towards a lower central area, where there is arranged an assembly of two or three vertical concentric filters with progressively smaller passage ports.
  • the object of the present invention is to provide a filtering device suitable to overcome the above-mentioned drawback.
  • the main advantage of the filtering device according to the present invention is to provide a high filtration without clogging problems, so as to validly contribute to a good washing effectiveness of the dishwasher.
  • Another advantage of the present device is that it is made up of few simple pieces, which positively affects its cost and ease of assembly and disassembly.
  • a plane filter 1 with a large-mesh net (1-2 mm), having a concave shape and centrally provided in the lowermost area with a seat for the filtering device according to the present invention.
  • Said device is substantially made up of a covering member 2 fixed at the top of a first filtering member 3 introduced into a second filtering member 4, the latter being in turn introduced into a third filtering member 5 with a close-mesh net (0,25-0,40 mm), a so-called microfilter.
  • the working of the present filtering device is not different from that of known filters as far as the general operation is concerned.
  • the water sprayed onto the dishes brings therewith food residues while falling down on the tank bottom, the larger residues being retained at the surface of the filtering group by the plane filter 1. In this way they are clearly visible to the user which can remove them manually before the following washing cycle.
  • Most of the water (about 80%) goes through the plane filter 1 and is directly sucked in by the washing pump, whereas the remaining portion enters the central filtering device through a plurality of passage ports P, as it will be better explained further on. Since during the washing cycle the water contained in the dishwasher is recycled by the washing pump about 10-12 times per minute, it may be assumed with a good approximation that during the whole cycle all the particles in the water will finally go through the filtering device.
  • a washing duct CL having a plurality of nozzles which tangentially spray the microfilter 5.
  • Water coming from the washing pump is periodically fed into the duct CL, e.g. at the beginning of each rinsing step, by opening an electrovalve EV. In this way the whole surface of microfilter 5, which is rotatably mounted in its seat, is washed by a counter-current from the nozzles of duct CL.
  • the covering member 2 (figs.3a-3c) has a substantially frustoconical circular shape with a concave lateral surface 6 having a curvature radius "R" (fig.1) between 15 and 25 mm, preferably 20 mm.
  • R curvature radius
  • a circular axial hole 8 having a diameter "d" (fig.1) between 5 and 7 mm, preferably 7 mm.
  • the concave surface 6 is divided into four equal portions by four vertical orthogonal fins 9 extending from the edge of the axial hole 8 to the periphery 10 of cover 2.
  • the fixing of the covering member 2 on the first filtering member 3 is performed through a pair of opposite teeth 11 integrally formed, together with a pair of reference pins 12, on the lower face of cover 2. Teeth 11 and pins 12 engage corresponding holes 13 formed in the first filtering member 3 (fig1 and fig.4a), so as to keep cover 2 centered and spaced with respect to the first filter 3.
  • the diameter of cover 2 is smaller than that of the top inner periphery 14 of the first filter 3, so that between said periphery 14 and the edge 10 of cover 2 there is a circular ring-shaped space having a width "L" (fig.1) between 4,5 and 6,5 mm, preferably 5,4 mm.
  • Said circular ring-shaped space, slots 7 and the axial hole 8 of cover 2 together are the above-mentioned passage ports P which allow the water to enter the filtering device according to the present invention.
  • the first filtering member 3 (figs.4a-4c) has a circular cylindrical body 15 ending at the top with a disk 16 in which the above-mentioned holes 13 are formed.
  • These slots 17 extend from disk 16 almost until the lower end of the cylindrical body 15.
  • two opposite vertical lugs 18 shaped so as to engage in corresponding seats 19 formed in the second filtering member 4 (fig.5a). In this way, the first filter 3 is restrained against axial rotation with respect to the second filter 4 in which it is introduced.
  • the second filtering member 4 (figs.5a-5c) also has a circular cylindrical body 20, whose diameter is reduced at about mid-height.
  • These slots 21 extend from the lower end of the cylindrical body 20 almost until the top, with a discontinuity at the change in diameter.
  • the structural integrity of body 20 is assured by a lower base in which there are formed a central seat 22, for introducing the first filter 3, as well as a plurality of holes 23, sixteen holes in the illustrated embodiment, symmetrically arranged for draining the filtered particles.
  • microfilter 5 (figs. 1, 2) which simply consists of a cylindrical net, with 0,25 mm mesh, provided with top and bottom reinforced edges.
  • the global assembly of the various members of the present filtering device is achieved by coupling the top edge of microfilter 5 with the outer periphery of disk 16 of the first filter 3, which projects with respect to the second filter 4.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Filtration Of Liquid (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Centrifugal Separators (AREA)

Claims (12)

  1. Filtervorrichtung für Spülmaschinen umfassend ein Deckelglied (2), das an der Oberseite eines ersten Filterelements (3) befestigt ist, welches in ein zweites Filterelement (4) eingesetzt ist, das wiederum in ein drittes Filterelement (5) mit einem engmaschigen Netz eingesetzt ist, wobei die Vorrichtung am Tankboden der Spülmaschine in der Mitte der konkaven Form eines Planfilters (1) mit einem grobmaschigen Netz angeordnet ist, dadurch gekennzeichnet, daß das genannte Deckelglied (2) eine im wesentlichen kegelstumpfartige, kreisförmige Form mit einer seitlichen, konkaven Fläche (6) hat, in der mehrere symmetrisch angeordnete radiale Schlitze (7) geformt sind, und an der Oberseite des Deckelglieds (2) eine kreisförmige axiale Öffnung (8) vorgesehen ist, wobei der Durchmesser des Deckelglieds (2) kleiner ist als der des oberen inneren Umfangs (14) des genannten ersten Filterelements (3), so daß zwischen dem genannten Umfang (14) und der Kante (10) des Deckelglieds (2) ein kreisringförmiger Raum für den Durchgang von Wasser mit einer Weite (L) zwischen 4,5 und 6,5 mm entsteht.
  2. Filtervorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das erste Filterelement (3) einen kreisförmigen, zylindrischen Körper (15) hat, der oben in einer Scheibe (16) endet, welche mit einer Vielzahl von Öffnungen (13) versehen ist, wobei in dem genannten zylindrischen Körper (15) mehrere symmetrisch angeordnete, vertikale Schlitze (17) geformt sind, die eine Weite zwischen 2,5 und 3,5 mm haben, wobei sich die genannten Schlitze (17) von der genannten Scheibe (16) fast bis zum unteren Ende des zylindrischen Körpers (15) erstrecken.
  3. Filtervorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Schlitze (17) sechs an der Zahl und 3 mm weit sind.
  4. Filtervorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das zweite Filterelement (4) einen kreisförmigen, zylindrischen Körper (20) hat, in dem mehrere symmetrisch angeordnete vertikale Schlitze (21) geformt sind, die eine Weite zwischen 0,8 und 1,2 mm haben, wobei sich die genannten Schlitze (21) vom unteren Ende des genannten zylindrischen Körpers (20) fast bis zur Spitze desselben erstrecken und der zylindrische Körper (20) ebenfalls mit einer unteren Basis versehen ist, in der ein mittlerer Sitz (22) für das Einsetzen des ersten Filters (3) und mehrere symmetrisch angeordnete Öffnungen (23) geformt sind.
  5. Filtervorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Schlitze achtundvierzig an der Zahl und 1,2 mm breit sind.
  6. Filtervorrichtung nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß das dritte Filterelement (5) aus einem zylindrischen Netz mit einer Maschenweite von 0,25 mm besteht, das mit oberen und unteren Verstärkungskanten versehen ist, wobei die genannte Oberkante mit Mitteln zur Befestigung am äußeren Umfang der Scheibe (16) des ersten Filterelements (3) versehen ist.
  7. Filterelement nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Schlitze (7) des Deckelglieds (2) zwölf an der Zahl und zwischen 1,2 und 1,6 mm, vorzugsweise 1,4 mm breit sind.
  8. Filtervorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die axiale Öffnung (8) des Deckelglieds (2) einen Durchmesser (d) zwischen 5 und 7 mm, vorzugsweise 7 mm hat.
  9. Filtervorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Weite (L) des kreisringförmigen Raums zwischen dem Deckelglied (2) und dem ersten Filterelement (3) 5,4 mm beträgt.
  10. Filtervorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die konkave Fläche (6) des Deckelglieds (2) einen Krümmungsradius (R) zwischen 15 und 25 mm, vorzugsweise 20 mm hat.
  11. Filtervorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die konkave Fläche (6) des Deckelglieds (2) durch vier vertikale, orthogonale Stege (9), die sich von der Kante der axialen Öffnung (8) bis zur Umfangskante (10) erstrecken, in vier gleiche Abschnitte geteilt ist.
  12. Filtervorrichtung nach einem der Ansprüche 2 bis 11, dadurch gekennzeichnet, daß das Deckelglied (2) an dem ersten Filterelement (3) durch ein Paar von gegenüberliegenden Zähnen (11) befestigt ist, die als Bestandteil der unteren Seite des Deckelglieds (2) geformt sind und zum Eingriff in Öffnungen (13) im ersten Filterelement (3) geeignet sind.
EP19980830010 1997-01-22 1998-01-15 Vorrichtung zum Filtern in Geschirrspülwaschmaschinen Expired - Lifetime EP0855165B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI970111 IT1289186B1 (it) 1997-01-22 1997-01-22 Dispositivo di filtrazione perfezionato per macchine lavastoviglie
ITMI970111 1997-01-22

Publications (3)

Publication Number Publication Date
EP0855165A2 EP0855165A2 (de) 1998-07-29
EP0855165A3 EP0855165A3 (de) 1999-01-13
EP0855165B1 true EP0855165B1 (de) 2003-04-16

Family

ID=11375690

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980830010 Expired - Lifetime EP0855165B1 (de) 1997-01-22 1998-01-15 Vorrichtung zum Filtern in Geschirrspülwaschmaschinen

Country Status (4)

Country Link
EP (1) EP0855165B1 (de)
DE (1) DE69813327T2 (de)
ES (1) ES2198041T3 (de)
IT (1) IT1289186B1 (de)

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1318186B1 (it) * 2000-07-18 2003-07-23 Candy Spa Apparato di filtraggio per lavastoviglie
US20080237154A1 (en) * 2007-02-06 2008-10-02 Electrolux Home Products, Inc. Filter device for a dishwasher, and associated apparatus and method
US8828148B2 (en) 2007-02-06 2014-09-09 Electrolux Home Products, Inc. Dishwasher with accessible control unit, and associated method
EP2087830B1 (de) * 2008-02-08 2010-01-06 Bonferraro S.p.A. Filteranordnung für industrielle Geschirrspüler
KR20100037459A (ko) * 2008-10-01 2010-04-09 엘지전자 주식회사 식기 세척기
KR101582877B1 (ko) 2009-04-03 2016-01-07 엘지전자 주식회사 식기세척기
PL2263512T5 (pl) * 2009-06-17 2019-05-31 Bonferraro Spa Przemysłowa zmywarka kapturowa z ulepszonym zespołem filtracyjnym
DE102009027910A1 (de) * 2009-07-22 2011-01-27 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit einem optimierten Siebsystem
US8746261B2 (en) 2009-12-21 2014-06-10 Whirlpool Corporation Rotating drum filter for a dishwashing machine
US9687135B2 (en) 2009-12-21 2017-06-27 Whirlpool Corporation Automatic dishwasher with pump assembly
US8627832B2 (en) 2010-12-13 2014-01-14 Whirlpool Corporation Rotating filter for a dishwashing machine
US8667974B2 (en) 2009-12-21 2014-03-11 Whirlpool Corporation Rotating filter for a dishwashing machine
US9119515B2 (en) 2010-12-03 2015-09-01 Whirlpool Corporation Dishwasher with unitary wash module
US9918609B2 (en) 2009-12-21 2018-03-20 Whirlpool Corporation Rotating drum filter for a dishwashing machine
WO2011080090A1 (en) * 2009-12-31 2011-07-07 Arcelik Anonim Sirketi A dishwasher comprising a microfilter
KR101669282B1 (ko) * 2010-03-31 2016-10-25 엘지전자 주식회사 식기 세척기
US9113766B2 (en) 2010-11-16 2015-08-25 Whirlpool Corporation Method and apparatus for dishwasher with common heating element for multiple treating chambers
US9668636B2 (en) 2010-11-16 2017-06-06 Whirlpool Corporation Method and apparatus for dishwasher with common heating element for multiple treating chambers
US9034112B2 (en) 2010-12-03 2015-05-19 Whirlpool Corporation Dishwasher with shared heater
US9107559B2 (en) 2011-05-16 2015-08-18 Whirlpool Corporation Dishwasher with filter assembly
US8733376B2 (en) 2011-05-16 2014-05-27 Whirlpool Corporation Dishwasher with filter assembly
US9265401B2 (en) 2011-06-20 2016-02-23 Whirlpool Corporation Rotating filter for a dishwashing machine
US20120318296A1 (en) 2011-06-20 2012-12-20 Whirlpool Corporation Ultra micron filter for a dishwasher
US9861251B2 (en) 2011-06-20 2018-01-09 Whirlpool Corporation Filter with artificial boundary for a dishwashing machine
US9005369B2 (en) 2011-06-20 2015-04-14 Whirlpool Corporation Filter assembly for a dishwasher
US9010344B2 (en) 2011-06-20 2015-04-21 Whirlpool Corporation Rotating filter for a dishwashing machine
US9301667B2 (en) 2012-02-27 2016-04-05 Whirlpool Corporation Soil chopping system for a dishwasher
US9237836B2 (en) 2012-05-30 2016-01-19 Whirlpool Corporation Rotating filter for a dishwasher
US9730570B2 (en) 2012-05-30 2017-08-15 Whirlpool Corporation Reduced sound with a rotating filter for a dishwasher
US9451862B2 (en) 2012-06-01 2016-09-27 Whirlpool Corporation Dishwasher with unitary wash module
US9833120B2 (en) 2012-06-01 2017-12-05 Whirlpool Corporation Heating air for drying dishes in a dishwasher using an in-line wash liquid heater
US9532700B2 (en) 2012-06-01 2017-01-03 Whirlpool Corporation Dishwasher with overflow conduit
US9554688B2 (en) 2012-10-23 2017-01-31 Whirlpool Corporation Rotating filter for a dishwasher and methods of cleaning a rotating filter
KR102343467B1 (ko) * 2015-02-16 2021-12-28 삼성전자주식회사 식기 세척기
US11026556B2 (en) 2015-07-21 2021-06-08 Lg Electronics Inc. Dishwasher
TR201619887A2 (tr) * 2016-12-28 2018-07-23 Arcelik As Mi̇krofi̇ltre i̇çeren bi̇r bulaşik maki̇nasi
PL3876809T3 (pl) * 2018-11-09 2023-12-27 Arçelik Anonim Sirketi Zmywarka do naczyń zawierająca filtr
CN112915582B (zh) * 2021-01-25 2022-11-29 江西永通科技股份有限公司 一种唇釉制作中红心火龙果中水溶性天然色素提取工具
EP4368094A1 (de) 2022-11-07 2024-05-15 Arçelik Anonim Sirketi Geschirrspülmaschine mit einem filtermechanismus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1197983B (it) * 1986-11-13 1988-12-21 Candy Elettrodomestici Ciclo di lavaggio per macchine lavatrici, in particolare lavastoviglie e macchina lavatrice operante secondo tale ciclo
IT1276718B1 (it) * 1995-06-14 1997-11-03 Smeg Spa Dispositivo per controllare il lavaggio del filtro di una macchina lavastoviglie

Also Published As

Publication number Publication date
ES2198041T3 (es) 2004-01-16
DE69813327T2 (de) 2003-12-11
EP0855165A3 (de) 1999-01-13
ITMI970111A1 (it) 1998-07-22
EP0855165A2 (de) 1998-07-29
IT1289186B1 (it) 1998-09-29
DE69813327D1 (de) 2003-05-22

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