EP0748607A2 - Dispositif pour contrÔler le lavage du filtre d'un lave vaisselle - Google Patents

Dispositif pour contrÔler le lavage du filtre d'un lave vaisselle Download PDF

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Publication number
EP0748607A2
EP0748607A2 EP96830337A EP96830337A EP0748607A2 EP 0748607 A2 EP0748607 A2 EP 0748607A2 EP 96830337 A EP96830337 A EP 96830337A EP 96830337 A EP96830337 A EP 96830337A EP 0748607 A2 EP0748607 A2 EP 0748607A2
Authority
EP
European Patent Office
Prior art keywords
valve
washing
nozzles
dishwasher
cleaning
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.)
Granted
Application number
EP96830337A
Other languages
German (de)
English (en)
Other versions
EP0748607A3 (fr
EP0748607B1 (fr
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
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 Smeg SpA filed Critical Smeg SpA
Publication of EP0748607A2 publication Critical patent/EP0748607A2/fr
Publication of EP0748607A3 publication Critical patent/EP0748607A3/fr
Application granted granted Critical
Publication of EP0748607B1 publication Critical patent/EP0748607B1/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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0049—Detection or prevention of malfunction, including accident prevention

Definitions

  • the present invention relates to devices which make part of a dishwasher, and in particular to a device for controlling the washing of the filter of a dishwasher.
  • a dishwasher includes filters on the tank floor for the capture of the dirt particles which are removed from the dishes during the washing, in order to prevent said particles from circulating back in the washing water and possibly depositing again on the dishes.
  • filters on the tank floor for the capture of the dirt particles which are removed from the dishes during the washing, in order to prevent said particles from circulating back in the washing water and possibly depositing again on the dishes.
  • a first large-mesh filter is provided for capturing the large-size particles
  • microfilter second close-mesh filter
  • the washing cycle includes several phases of loading and discharging water in the dishwasher tank, it is advisable that at each clean water loading the filters are ready to capture as many particles as possible, in order to increase the washing effectiveness. It is clear that the achievement of this result requires the filters to be cleaned at best, because if they are clogged they can not properly carry out their filtering function.
  • cleaning nozzles are usually provided in a branch from the duct which feeds the water to the lower sprinkler. These nozzles eject counter-current jets which wash the microfilter, thus removing the dirt particles accumulated thereon.
  • a conventional solution for limiting the cleaning of the microfilter to specific periods during the washing cycle is the use of an electromechanical control device.
  • Such a device usually includes an electrovalve controlled by a pressure switch, so as to close the branch which feeds the water to the cleaning nozzles when the feed pressure reaches a pre-established value.
  • the object of the present invention is to provide a device for controlling the microfilter washing which is suitable to overcome the above-mentioned drawbacks.
  • a dishwasher includes, as mentioned above, a large-mesh filter 1 and a microfilter 2 concentric thereto and revolving around the common axis X. Said filters are located on the floor of tank 3 and in communication with a lower discharge space 4. The water coming from the hydraulic network is loaded into the tank, and from here it is then sucked up by a washing pump which feeds it under pressure into the washing circuit through a feed duct 5.
  • a cleaning duct 6 branches out from said duct 5 and terminates with some washing nozzles 7, which throw tangential jets on microfilter 2 for cleaning it while putting it into rotation, so as to act on its whole surface.
  • a first embodiment of the control device according to the present invention located at the beginning of branch 6, is illustrated in detail in the enlargement of fig.2.
  • the device includes a vertical gate valve 8 on whose stem, outside from branch 6, a spring 9 is inserted between the seat of valve 8 and the hemispherical lower end 10 of the stem. Said end 10 is in contact with a lever 11, pivoted onto a support 12, whose opposite end is in turn in contact with the hemispherical lower end 13 of a small rod 14.
  • This rod 14 is provided with a small top plate 15 and a bottom annular rim 16, which define the limits of the vertical displacement of rod 14 within a seat formed in support 12.
  • the device includes a flexible membrane 17 which closes an opening, concentric with rod 14, formed in the wall of the cleaning duct 6.
  • the operation of the above-mentioned device is very simple and reliable, in that it is based on the water feed pressure.
  • the increase of the water level in the tank and therefore of the pressure at which the water is circulated by the washing pump, which sucks up less and less air, causes also the force exerted on the small plate 15 through membrane 17 to increase in proportion.
  • nozzles 7 clean microfilter 2 and, thanks to the reduced turbulence in the tank, the dirt particles can fall into the discharge space 4 which is progressively filled.
  • a second embodiment of the device according to the present invention is now illustrated with reference to figs.3, 4, 5a and 5b.
  • the device is located in branch 6 also in this case, but at the bottom of tank 3 rather than near duct 5.
  • the interruption of the cleaning of microfilter 2 is caused in a simple and reliable way by the pressure reached by the washing water.
  • the water pressure when the water pressure is low, the water enters chamber 19 and goes round stopper 25 to proceed into the cleaning tube 21, as indicated by the arrows in fig.5a.
  • the water exerts its pressure on both sides of stopper 25, therefore with a null vertical resultant, but only on the lower side of plate 24, thus pushing it upwards.
  • the pressure generated by the washing pump increases along with the water level in the tank, also the pressure on plate 24 in chamber 19 will reach a value sufficient to overcome the strength of spring 23. At this moment, plate 24 will shift upwards and move along therewith, through ribs 26, the stopper 25 which stops the water flow to nozzles 7 (fig.5b).

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Check Valves (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
EP96830337A 1995-06-14 1996-06-12 Dispositif pour contrôler le lavage du filtre d'un lave vaisselle Expired - Lifetime EP0748607B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT95MI001271A IT1276718B1 (it) 1995-06-14 1995-06-14 Dispositivo per controllare il lavaggio del filtro di una macchina lavastoviglie
ITMI951271 1995-06-14

Publications (3)

Publication Number Publication Date
EP0748607A2 true EP0748607A2 (fr) 1996-12-18
EP0748607A3 EP0748607A3 (fr) 1997-05-14
EP0748607B1 EP0748607B1 (fr) 2001-03-28

Family

ID=11371811

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96830337A Expired - Lifetime EP0748607B1 (fr) 1995-06-14 1996-06-12 Dispositif pour contrôler le lavage du filtre d'un lave vaisselle

Country Status (4)

Country Link
EP (1) EP0748607B1 (fr)
DE (1) DE69612236T2 (fr)
ES (1) ES2156268T3 (fr)
IT (1) IT1276718B1 (fr)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0855165A3 (fr) * 1997-01-22 1999-01-13 SMEG S.p.A. Dispositif de filtrage pour machines à laver la vaisselle
EP1878377A1 (fr) * 2006-07-10 2008-01-16 Bonferraro S.p.A. Filtre de lave-vaisselle
WO2011076650A1 (fr) * 2009-12-25 2011-06-30 Arcelik Anonim Sirketi Lave-vaisselle comportant un micro-filtre
US8215322B2 (en) 2008-12-22 2012-07-10 Whirlpool Corporation Dishwasher with soil removal
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
US8733376B2 (en) 2011-05-16 2014-05-27 Whirlpool Corporation Dishwasher with filter assembly
US8746261B2 (en) 2009-12-21 2014-06-10 Whirlpool Corporation Rotating drum filter 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
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
US9113766B2 (en) 2010-11-16 2015-08-25 Whirlpool Corporation Method and apparatus for dishwasher with common heating element for multiple treating chambers
US9119515B2 (en) 2010-12-03 2015-09-01 Whirlpool Corporation Dishwasher with unitary wash module
US9237836B2 (en) 2012-05-30 2016-01-19 Whirlpool Corporation Rotating filter for a dishwasher
US9265401B2 (en) 2011-06-20 2016-02-23 Whirlpool Corporation Rotating filter for a dishwashing machine
US9301667B2 (en) 2012-02-27 2016-04-05 Whirlpool Corporation Soil chopping system for a dishwasher
US9451862B2 (en) 2012-06-01 2016-09-27 Whirlpool Corporation Dishwasher with unitary wash module
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
US9668636B2 (en) 2010-11-16 2017-06-06 Whirlpool Corporation Method and apparatus for dishwasher with common heating element for multiple treating chambers
US9687135B2 (en) 2009-12-21 2017-06-27 Whirlpool Corporation Automatic dishwasher with pump assembly
US9730570B2 (en) 2012-05-30 2017-08-15 Whirlpool Corporation Reduced sound with a rotating filter for a dishwasher
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
US9861251B2 (en) 2011-06-20 2018-01-09 Whirlpool Corporation Filter with artificial boundary for a dishwashing machine
US9918609B2 (en) 2009-12-21 2018-03-20 Whirlpool Corporation Rotating drum filter for a dishwashing machine
US10653291B2 (en) 2011-06-20 2020-05-19 Whirlpool Corporation Ultra micron filter for a dishwasher

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11241138B2 (en) 2017-03-16 2022-02-08 Haier Us Appliance Solutions, Inc. Fluid circulation system for dishwasher appliances
US10314458B2 (en) 2017-03-28 2019-06-11 Haier Us Appliance Solutions, Inc. Fluid circulation system for dishwasher appliances and related methods

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3807419A (en) * 1972-05-12 1974-04-30 Gen Electric Dishwasher having means for collecting and removing food soil
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
US5345957A (en) * 1993-09-07 1994-09-13 Maytag Corporation Dishwasher filter arrangement
DE9415486U1 (de) * 1994-09-24 1994-11-17 Bauknecht Hausgeräte GmbH, 70563 Stuttgart Geschirrspülmaschine mit einem Spülwasser-Kreislauf und einer Filtervorrichtung mit Reinigungsvorrichtung

Cited By (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0855165A3 (fr) * 1997-01-22 1999-01-13 SMEG S.p.A. Dispositif de filtrage pour machines à laver la vaisselle
EP1878377A1 (fr) * 2006-07-10 2008-01-16 Bonferraro S.p.A. Filtre de lave-vaisselle
US8215322B2 (en) 2008-12-22 2012-07-10 Whirlpool Corporation Dishwasher with soil removal
US8667974B2 (en) 2009-12-21 2014-03-11 Whirlpool Corporation Rotating filter for a dishwashing machine
US9375129B2 (en) 2009-12-21 2016-06-28 Whirlpool Corporation Rotating filter for a dishwashing machine
US10779703B2 (en) 2009-12-21 2020-09-22 Whirlpool Corporation Rotating drum filter for a dishwashing machine
US8746261B2 (en) 2009-12-21 2014-06-10 Whirlpool Corporation Rotating drum filter for a dishwashing machine
US9918609B2 (en) 2009-12-21 2018-03-20 Whirlpool Corporation Rotating drum filter for a dishwashing machine
US9687135B2 (en) 2009-12-21 2017-06-27 Whirlpool Corporation Automatic dishwasher with pump assembly
US9211047B2 (en) 2009-12-21 2015-12-15 Whirlpool Corporation Rotating filter for a dishwashing machine
CN102655801A (zh) * 2009-12-25 2012-09-05 阿塞里克股份有限公司 包括微过滤器的洗碗机
US9492052B2 (en) 2009-12-25 2016-11-15 Arcelik Anonim Sirketi Dishwasher comprising a microfilter
WO2011076650A1 (fr) * 2009-12-25 2011-06-30 Arcelik Anonim Sirketi Lave-vaisselle comportant un micro-filtre
US9668636B2 (en) 2010-11-16 2017-06-06 Whirlpool Corporation Method and apparatus for dishwasher with common heating element for multiple treating chambers
US9113766B2 (en) 2010-11-16 2015-08-25 Whirlpool Corporation Method and apparatus for dishwasher with common heating element for multiple treating chambers
US9572473B2 (en) 2010-12-03 2017-02-21 Whirlpool Corporation Dishwasher with unitary wash module
US9119515B2 (en) 2010-12-03 2015-09-01 Whirlpool Corporation Dishwasher with unitary wash module
US9034112B2 (en) 2010-12-03 2015-05-19 Whirlpool Corporation Dishwasher with shared heater
US9532697B2 (en) 2010-12-03 2017-01-03 Whirlpool Corporation Dishwasher with unitary wash module
US9532696B2 (en) 2010-12-03 2017-01-03 Whirlpool Corporation Dishwasher with unitary wash module
US9364131B2 (en) 2010-12-13 2016-06-14 Whirlpool Corporation Rotating filter for a dishwashing machine
US8627832B2 (en) 2010-12-13 2014-01-14 Whirlpool Corporation Rotating filter for a dishwashing machine
US9538898B2 (en) 2011-05-16 2017-01-10 Whirlpool Corporation Dishwasher with filter assembly
US9167950B2 (en) 2011-05-16 2015-10-27 Whirlpool Corporation Dishwasher with filter assembly
US8733376B2 (en) 2011-05-16 2014-05-27 Whirlpool Corporation Dishwasher with filter assembly
US11882977B2 (en) 2011-05-16 2024-01-30 Whirlpool Corporation Dishwasher with filter assembly
US9700196B2 (en) 2011-05-16 2017-07-11 Whirlpool Corporation Dishwasher with filter assembly
US9107559B2 (en) 2011-05-16 2015-08-18 Whirlpool Corporation Dishwasher with filter assembly
US9861251B2 (en) 2011-06-20 2018-01-09 Whirlpool Corporation Filter with artificial boundary for a dishwashing machine
US10058227B2 (en) 2011-06-20 2018-08-28 Whirlpool Corporation Filter assembly for a dishwasher
US10813525B2 (en) 2011-06-20 2020-10-27 Whirlpool Corporation Ultra micron filter for a dishwasher
US10070769B2 (en) 2011-06-20 2018-09-11 Whirlpool Corporation Rotating filter for a dishwashing machine
US9010344B2 (en) 2011-06-20 2015-04-21 Whirlpool Corporation Rotating filter for a dishwashing machine
US9265401B2 (en) 2011-06-20 2016-02-23 Whirlpool Corporation Rotating filter for a dishwashing machine
US10314457B2 (en) 2011-06-20 2019-06-11 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
US10653291B2 (en) 2011-06-20 2020-05-19 Whirlpool Corporation Ultra micron filter for a dishwasher
US10178939B2 (en) 2011-06-20 2019-01-15 Whirlpool Corporation Filter with artificial boundary for a dishwashing machine
US9301667B2 (en) 2012-02-27 2016-04-05 Whirlpool Corporation Soil chopping system for a dishwasher
US10058228B2 (en) 2012-02-27 2018-08-28 Whirlpool Corporation Soil chopping system for a dishwasher
US10376128B2 (en) 2012-05-30 2019-08-13 Whirlpool Corporation Reduced sound with a rotating filter for a dishwasher
US9730570B2 (en) 2012-05-30 2017-08-15 Whirlpool Corporation Reduced sound with a rotating filter for a dishwasher
US11134825B2 (en) 2012-05-30 2021-10-05 Whirlpool Corporation Reduced sound with a rotating filter for a dishwasher
US9237836B2 (en) 2012-05-30 2016-01-19 Whirlpool Corporation Rotating filter for a dishwasher
US10076226B2 (en) 2012-05-30 2018-09-18 Whirlpool Corporation Rotating filter for a dishwasher
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
US9451862B2 (en) 2012-06-01 2016-09-27 Whirlpool Corporation Dishwasher with unitary wash module
US9532700B2 (en) 2012-06-01 2017-01-03 Whirlpool Corporation Dishwasher with overflow conduit
US9962060B2 (en) 2012-10-23 2018-05-08 Whirlpool Corporation Rotating filter for a dishwasher and methods of cleaning a rotating filter
US9826882B2 (en) 2012-10-23 2017-11-28 Whirlpool Corporation Rotating filter for a dishwasher and methods of cleaning a rotating filter
US9757008B2 (en) 2012-10-23 2017-09-12 Whirlpool Corporation Rotating filter for a dishwasher and methods of cleaning a rotating filter
US9649007B2 (en) 2012-10-23 2017-05-16 Whirlpool Corporation Rotating filter for a dishwasher and methods of cleaning a rotating filter
US9554688B2 (en) 2012-10-23 2017-01-31 Whirlpool Corporation Rotating filter for a dishwasher and methods of cleaning a rotating filter

Also Published As

Publication number Publication date
EP0748607A3 (fr) 1997-05-14
ITMI951271A1 (it) 1996-12-14
ES2156268T3 (es) 2001-06-16
ITMI951271A0 (it) 1995-06-14
DE69612236D1 (de) 2001-05-03
DE69612236T2 (de) 2001-08-23
EP0748607B1 (fr) 2001-03-28
IT1276718B1 (it) 1997-11-03

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