EP2548493A1 - Geschirrspüler mit einem Dampferzeuger - Google Patents

Geschirrspüler mit einem Dampferzeuger Download PDF

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Publication number
EP2548493A1
EP2548493A1 EP11425196A EP11425196A EP2548493A1 EP 2548493 A1 EP2548493 A1 EP 2548493A1 EP 11425196 A EP11425196 A EP 11425196A EP 11425196 A EP11425196 A EP 11425196A EP 2548493 A1 EP2548493 A1 EP 2548493A1
Authority
EP
European Patent Office
Prior art keywords
dishwasher
wash
duct
steam generator
sump
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
EP11425196A
Other languages
English (en)
French (fr)
Other versions
EP2548493B1 (de
Inventor
Andrea Ambrosi
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.)
Bonferraro SpA
Original Assignee
Bonferraro 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 Bonferraro SpA filed Critical Bonferraro SpA
Priority to PL11425196T priority Critical patent/PL2548493T3/pl
Priority to EP11425196.0A priority patent/EP2548493B1/de
Publication of EP2548493A1 publication Critical patent/EP2548493A1/de
Application granted granted Critical
Publication of EP2548493B1 publication Critical patent/EP2548493B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A47L15/4234—Steam generating arrangements
    • 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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4219—Water recirculation

Definitions

  • the present invention relates to dishwashers, and in particular to a dishwasher provided with a steam generator.
  • some dishwashers include a steam generator that introduces hot steam in the wash tank so as to soften the residues that are thus easier to remove, in particular in the initial pre-wash step.
  • a steam generator that introduces hot steam in the wash tank so as to soften the residues that are thus easier to remove, in particular in the initial pre-wash step. Examples of dishwashers with a steam generator are disclosed in WO 2009/028786A1 , EP 2039278A1 and EP 2193739A1 .
  • the obj ect of the present invention is to provide a dishwasher provided with a simplified and preferably self-cleaning steam generation circuit so as to overcome the above-mentioned drawbacks.
  • This object is achieved by means of a dishwasher provided with a steam generation circuit extending between the wash circuit and the wash tank, the steam generator being arranged at a height lower than the maximum filling level of the collecting sump located at the bottom of the wash tank.
  • Other advantageous features of the present dishwasher are disclosed in the dependent claims.
  • the main advantage of this dishwasher resides in using the collecting sump as a reservoir for the steam generator, thus greatly simplifying the structure of the steam generation circuit. In this way, in fact, it is possible to dispense with a specific reservoir for the steam generator and with the relevant valved supply duct with clear advantages in terms of cost and bulkiness.
  • a further advantage of the present dishwasher stems from the fact that, in a preferred embodiment, the cleaning of the steam generator is performed automatically at the beginning of the wash cycle without requiring additional components or a greater water consumption.
  • a dishwasher according to the present invention is conventionally provided with a wash tank 1 having an underlying collecting sump 2, that has a maximum filling level 3, from where the water is drawn off by a wash pump 4 and sent to a sprinkler 5 for washing the dishes housed in a rack 6 (just one sprinkler 5 and one rack 6 are shown for the sake of simplicity, but the dishwasher will usually have two of each).
  • the novel aspect of the present invention resides in the fact that between tank 1 and the underlying wash circuit made up of sump 2, wash pump 4 and sprinkler(s) 5 there is arranged a steam generation circuit 7.
  • Said circuit 7 consists of a duct 8 branching out of sump 2 and ending with a nozzle 9 that projects into wash tank 1, preferably from a side wall at a position higher than sprinkler 5, as well as a steam generator 10 arranged in duct 8 at a height lower than the maximum filling level 3 of sump 2, the operation of the steam generator 10 being controlled by a thermostat 11 located thereon.
  • sump 2 is filled with water, usually coming from a decalcifier (not shown), up to level 3 such that due to the communicating vessels principle also duct 8 is filled with water up to level 3 and the steam generator 10 is submersed. Then the steam generator 10, which is a resistor in practice, is activated to heat the water therein until it is turned into steam that through duct 8 and nozzle 9 reaches tank 1 where it expands and invests all the dishes.
  • the continuous generation of steam causes the water level to decrease until it arrives below thermostat 11 that, being no longer cooled by water, due to the heat coming from the steam generator 10 reaches its intervention temperature and thus opens the circuit stopping the operation of the steam generator 10.
  • thermostat 11 The switching of thermostat 11 is detected by the control unit of the dishwasher that opens the electrovalve for loading the water and keeps it open until level 3 is restored, as detected by the cooling and new switching of thermostat 11. As an alternative, it is even possible to bypass the control unit by connecting thermostat 11 directly to the load electrovalve according to a scheme well known in the field.
  • duct 8 does not branch out from sump 2 but rather from the delivery duct 12 connecting the wash pump 4 to sprinkler 5, and is also preferably provided with a valve 13 located upstream from the steam generator 10. In this way, the operation of the steam generator 10 is the same as illustrated above but when the wash pump 4 is activated after the steam generation step, valve 13 being open, duct 8 is flushed with pressurized water that cleans it from possible limescale.
  • valve 13 is then closed so as to cut off said circuit 7 and proceed with the normal operation of the dishwasher ( Fig.3 ). It should be noted, however, that this slight increase in water consumption could be offset by the saving in not installing valve 13 whereby said second embodiment could even do without said valve 13.
  • circuit 7 can change somewhat according to specific manufacturing needs, as long as it is in communication with the wash circuit and the steam generator 10 is located below level 3.
  • nozzle 9 could be located on the ceiling or the bottom of the wash tank and the operation of the steam generator 10 could be controlled directly by the control unit rather than by thermostat 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
EP11425196.0A 2011-07-19 2011-07-19 Geschirrspüler mit einem Dampferzeuger Active EP2548493B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL11425196T PL2548493T3 (pl) 2011-07-19 2011-07-19 Zmywarka do naczyń z generatorem pary
EP11425196.0A EP2548493B1 (de) 2011-07-19 2011-07-19 Geschirrspüler mit einem Dampferzeuger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11425196.0A EP2548493B1 (de) 2011-07-19 2011-07-19 Geschirrspüler mit einem Dampferzeuger

Publications (2)

Publication Number Publication Date
EP2548493A1 true EP2548493A1 (de) 2013-01-23
EP2548493B1 EP2548493B1 (de) 2013-11-13

Family

ID=44582801

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11425196.0A Active EP2548493B1 (de) 2011-07-19 2011-07-19 Geschirrspüler mit einem Dampferzeuger

Country Status (2)

Country Link
EP (1) EP2548493B1 (de)
PL (1) PL2548493T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3017746A1 (de) * 2014-11-06 2016-05-11 Vestel Beyaz Esya Sanayi Ve Ticaret A.S. Spülvorrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20305082U1 (de) * 2003-03-28 2003-06-05 Chen Chung Ming Geschirrspüler
US20080236625A1 (en) * 2007-03-31 2008-10-02 Lg Electronics Inc. Control method of dish washing machine
WO2009028786A1 (en) 2007-08-31 2009-03-05 Lg Electronics Inc. A method of controlling a dishwashing machine having a steam generator
EP2039278A1 (de) 2007-09-21 2009-03-25 LG Electronics Inc. Dampfgeschirrspüler
EP2193739A1 (de) 2007-05-30 2010-06-09 Lg Electronics Inc. Geschirrspülmaschine mit Dampfgenerator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20305082U1 (de) * 2003-03-28 2003-06-05 Chen Chung Ming Geschirrspüler
US20080236625A1 (en) * 2007-03-31 2008-10-02 Lg Electronics Inc. Control method of dish washing machine
EP2193739A1 (de) 2007-05-30 2010-06-09 Lg Electronics Inc. Geschirrspülmaschine mit Dampfgenerator
WO2009028786A1 (en) 2007-08-31 2009-03-05 Lg Electronics Inc. A method of controlling a dishwashing machine having a steam generator
EP2039278A1 (de) 2007-09-21 2009-03-25 LG Electronics Inc. Dampfgeschirrspüler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3017746A1 (de) * 2014-11-06 2016-05-11 Vestel Beyaz Esya Sanayi Ve Ticaret A.S. Spülvorrichtung

Also Published As

Publication number Publication date
PL2548493T3 (pl) 2014-04-30
EP2548493B1 (de) 2013-11-13

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