EP0455151A1 - Geschirrspülmaschine - Google Patents

Geschirrspülmaschine Download PDF

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Publication number
EP0455151A1
EP0455151A1 EP91106760A EP91106760A EP0455151A1 EP 0455151 A1 EP0455151 A1 EP 0455151A1 EP 91106760 A EP91106760 A EP 91106760A EP 91106760 A EP91106760 A EP 91106760A EP 0455151 A1 EP0455151 A1 EP 0455151A1
Authority
EP
European Patent Office
Prior art keywords
washing
filter
fact
dishwashing machine
machine according
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.)
Ceased
Application number
EP91106760A
Other languages
English (en)
French (fr)
Inventor
Giuseppe Schena
Marcello Premoli
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.)
Whirlpool EMEA SpA
Original Assignee
Merloni Elettrodomestici 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 Merloni Elettrodomestici SpA filed Critical Merloni Elettrodomestici SpA
Publication of EP0455151A1 publication Critical patent/EP0455151A1/de
Ceased 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
    • A47L15/4204—Flat filters

Definitions

  • the present invention relates to an improved dishwashing machine, comprising a cabinet that houses a washing chamber, means to wash the dishes that comprises spraying organs for the spraying of the dishes with a washing liquid and organs for the circulation of the washing liquid, being drawn from the bottom of the washing chamber and in turn supplying the liquid to the spraying organs of the dishes, means to filter the washing liquid and to block the residues removed from the dishes before supplying the spraying organs.
  • dishwashers are furnished with one or more rotating collectors that spray the dishes with the washing liquid, which are fed with water under pressure by a respective washing pump situated in the base of the machine.
  • the water that is sprayed on the dishes by means of the rotating collectors finishes on the bottom of the washing chamber where it is collected in a sump situated in the base of the machine from here it is pumped by means of the pump that then sends the water under pressure to the rotating collectors.
  • the water contains all of the impurities and food residues that have been removed from the dishes during the washing.
  • dishwashing machines are furnished with means to filter the water before it is pumped by the washing pump to the rotating collectors.
  • Said water filtering means must be periodically cleaned of the residues contained in them.
  • the cleaning must be carried out in order to avoid the accumulation of said residues on the filter, which would cause a loss in efficiency.
  • the water used for the rinsing of the dishes is not perfectly clean, being sprayed on the dishes by means of the rotating collectors, this could cause the depositing of the residues and impurities previously collected by the filter during the washing cycle and circulated again with the introduction to the machine of the rinsing water on the freshly washed dishes.
  • the system most commonly used in recent years is that of furnishing the dishwasher with a removable filter. In this way, after every or numerous complete washing cycles the filter can be removed and cleaned of the residues contained in it.
  • This system allows for the cleaning of the filter, but depends upon the frequency with which this operation is carried out and also presents the disadvantage that this operation is typically carried out at the end of the washing and above all when it is not really necessary: that is before carrying out the rinsing cycle.
  • the cleaning of the filter should be carried out after the washing phase but before the rinsing cycle.
  • Another known system used with modern dishwashing machines, is to furnish the rotating collector above the filter, with nozzles also present in the inferior section.
  • the collector apart from spraying water on the dishes, in order to wash them, by means of nozzles present on the superior section, with the nozzles present on the inferior section also sprays water on the filter conveying the residues in a small tank which is discharged at the end of every washing phase by means of a discharging pump.
  • the filter during the functioning of the dishwashing machine, the filter must not be covered by the washing water otherwise the inferior nozzles would spray water on to the surface of the underlying water covering the filter without removing the underlying residues, instead of spraying water over the residues covering the filter.
  • the aim of the present invention is to indicate a dishwashing machine furnished with an improved system for the cleaning of the filter that does not present the inconveniences of the type known.
  • the present invention has as its object an improved dishwashing machine, comprising a cabinet that houses a washing chamber, means to wash the dishes that comprises spraying organs for the spraying of the dishes with a washing liquid and organs for the circulation of the washing liquid, being drawn from the bottom of the chamber and in turn supplying the liquid to the spraying organs of the dishes, means to filter the washing liquid and to block the residues removed from the dishes before supplying the spraying organs, characterised by the fact that means for cleaning the filter of residues and impurities detained during the washing are foreseen, that become operative at the end of at least one wash phase of the foreseen wash cycle, after the the washing liquid has been discharged from the washing chamber utilised during the the washing phase and that the filters cleaning means are fed with clean water taken from the water mains.
  • the reference number 1 indicates an inferior rotating collector of the dishwasher; a water pipe of a metal or plastic material is indicated by the reference number 2, modelled in a ring shaped form, in which the liquid can pass.
  • Said ring 2 has a diameter slightly larger than that of the filter 7 and is positioned above the filter at the inferior section of the washing chamber.
  • a certain number of apertures or nozzles indicated by the number 3 are present on this ring 2.
  • apertures or nozzles 3 are utilised for sending jets of liquid on the filter 7.
  • Said apertures or nozzles are of a dimension and positioned either downwardly or towards the inside of the ring 2, in such a way that the jets of liquid, indicated with the reference number 5, spray the complete surface of the filter and send the residues to the sump 9 and in turn to the small tank that is in communication with the discharge pump 8.
  • Said ring 2 incorporates a connector, indicated with the reference number 4, which permits the supply of water to the ring.
  • Said connector is connected to the water supply by means of an electric valve 6.
  • the programmer activates the discharge pump 8, to discharge the water present at the bottom of the washing chamber, and also activates the electric valve 6.
  • Said electric valve 6 opens a passage of water from the water supply to the filter cleaning device.
  • the water that reaches the device is released from the apertures or nozzles 3 present on the ring shaped water pipe 2, creating jets of water aimed at the filter 7.
  • the quantity of water taken from the water mains must be smaller than the quantity that the pump 8 can discharge, in such a way that during the operation of cleaning the filter 7, it always remains in contact with the jets of water.
  • the programmer activates the cycle of the dishwashing machine, that can complete its several programmed rinsing phases with really clean water.
  • This operation for cleaning the filter may take place several times during the washing cycle, for example after the prewash phase and again at the end of the washing phase before the rinsing.
  • the ring shaped pipe 2 can also be used for the charging of the water necessary for the washing and the rinsing of the dishes.
  • the filter does not completely cover the circular area for constructive reasons, for which a part is covered with a non perforated section of the filter, in such cases the pipe 2 is not necessarily ring shaped.
  • a further variation could be that of joining the two almost semicircular elements at their extremities, so as to form a pipe following a "C" shape, joining the two extremities that face the active part of the filter as shown with the piece of pipe indicated by the dotted line in figure 3.
  • a further variation may consist in feeding a filter cleaning device, not with water directly obtained from the water main, but suitably forced by the wash pump. In this way, the water under pressure coming from the pump, will provide for a more efficient removal of the residues from the filter.
EP91106760A 1990-05-04 1991-04-26 Geschirrspülmaschine Ceased EP0455151A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6733190 1990-05-04
IT06733190A IT1248417B (it) 1990-05-04 1990-05-04 Macchina lavastoviglie perfezionata.

Publications (1)

Publication Number Publication Date
EP0455151A1 true EP0455151A1 (de) 1991-11-06

Family

ID=11301516

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91106760A Ceased EP0455151A1 (de) 1990-05-04 1991-04-26 Geschirrspülmaschine

Country Status (2)

Country Link
EP (1) EP0455151A1 (de)
IT (1) IT1248417B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0774230A3 (de) * 1995-11-14 1998-07-01 CANDY S.p.A. Waschgänge für Waschmaschine
EP1362546A2 (de) * 2002-05-16 2003-11-19 Electrolux Home Products Corporation N.V. Verfahren zum Betreiben einer Geschirrspülmaschine und entsprechende Geschirrspülmaschine
WO2006116244A1 (en) * 2005-04-25 2006-11-02 Viking Range Corporation Primary filter cleaning system for a dishwasher
WO2011043864A3 (en) * 2009-10-08 2011-06-23 Premark Feg L.L.C. Conveyor warewasher having an automatic wastewater removal system
US9872598B2 (en) 2011-07-06 2018-01-23 Viking Range, Llc Drying system for a dishwasher
US9943210B2 (en) 2014-05-13 2018-04-17 Illinois Tool Works Inc. Warewasher with automated scrapping system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3491780A (en) * 1967-12-11 1970-01-27 Maytag Co Self-cleaning filter for dishwasher
US4243431A (en) * 1979-06-14 1981-01-06 Whirlpool Corporation Dishwasher soil separator
DE3114663A1 (de) * 1981-04-10 1982-10-28 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Anordnung von sieben in der ablaufwanne von geschirrspuelmaschinen
EP0082592A1 (de) * 1981-11-09 1983-06-29 KITCHENAID, INC. (a Delaware corporation) Geschirrspüler
GB2161699A (en) * 1984-07-19 1986-01-22 Bosch Siemens Hausgeraete Filter arrangement in a dishwashing machine
EP0234675A2 (de) * 1986-02-26 1987-09-02 The Stero Company Geschirrspülmaschine und Verfahren mit niedrigem Energie- und Wasserverbrauch
EP0341766A2 (de) * 1988-05-05 1989-11-15 Unilever N.V. Verfahren zum maschinellen Spülen von Geschirr

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3491780A (en) * 1967-12-11 1970-01-27 Maytag Co Self-cleaning filter for dishwasher
US4243431A (en) * 1979-06-14 1981-01-06 Whirlpool Corporation Dishwasher soil separator
DE3114663A1 (de) * 1981-04-10 1982-10-28 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Anordnung von sieben in der ablaufwanne von geschirrspuelmaschinen
EP0082592A1 (de) * 1981-11-09 1983-06-29 KITCHENAID, INC. (a Delaware corporation) Geschirrspüler
GB2161699A (en) * 1984-07-19 1986-01-22 Bosch Siemens Hausgeraete Filter arrangement in a dishwashing machine
EP0234675A2 (de) * 1986-02-26 1987-09-02 The Stero Company Geschirrspülmaschine und Verfahren mit niedrigem Energie- und Wasserverbrauch
EP0341766A2 (de) * 1988-05-05 1989-11-15 Unilever N.V. Verfahren zum maschinellen Spülen von Geschirr

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0774230A3 (de) * 1995-11-14 1998-07-01 CANDY S.p.A. Waschgänge für Waschmaschine
EP1362546A2 (de) * 2002-05-16 2003-11-19 Electrolux Home Products Corporation N.V. Verfahren zum Betreiben einer Geschirrspülmaschine und entsprechende Geschirrspülmaschine
EP1362546A3 (de) * 2002-05-16 2004-02-11 Electrolux Home Products Corporation N.V. Verfahren zum Betreiben einer Geschirrspülmaschine und entsprechende Geschirrspülmaschine
WO2006116244A1 (en) * 2005-04-25 2006-11-02 Viking Range Corporation Primary filter cleaning system for a dishwasher
WO2011043864A3 (en) * 2009-10-08 2011-06-23 Premark Feg L.L.C. Conveyor warewasher having an automatic wastewater removal system
US20120199166A1 (en) * 2009-10-08 2012-08-09 Premark Feg L.L.C. Conveyor warewasher having an automatic wastewater removal system
US8881750B2 (en) * 2009-10-08 2014-11-11 Premark Feg L.L.C. Conveyor warewasher having an automatic wastewater removal system
DE102009048810B4 (de) * 2009-10-08 2015-08-13 Premark Feg L.L.C. Spülmaschine mit Schmutzaustragsystem
US9872598B2 (en) 2011-07-06 2018-01-23 Viking Range, Llc Drying system for a dishwasher
US9943210B2 (en) 2014-05-13 2018-04-17 Illinois Tool Works Inc. Warewasher with automated scrapping system

Also Published As

Publication number Publication date
IT9067331A0 (it) 1990-05-04
IT9067331A1 (it) 1991-11-04
IT1248417B (it) 1995-01-16

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

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