EP2292139B1 - Process for controlling the operation of a dishwashing machine - Google Patents

Process for controlling the operation of a dishwashing machine Download PDF

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Publication number
EP2292139B1
EP2292139B1 EP10175422.4A EP10175422A EP2292139B1 EP 2292139 B1 EP2292139 B1 EP 2292139B1 EP 10175422 A EP10175422 A EP 10175422A EP 2292139 B1 EP2292139 B1 EP 2292139B1
Authority
EP
European Patent Office
Prior art keywords
water
level
sump
control unit
washing
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.)
Not-in-force
Application number
EP10175422.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2292139A1 (en
Inventor
Enzo Brignone
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.)
Bitron SpA
Original Assignee
Bitron 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 Bitron SpA filed Critical Bitron SpA
Priority to PL10175422T priority Critical patent/PL2292139T3/pl
Publication of EP2292139A1 publication Critical patent/EP2292139A1/en
Application granted granted Critical
Publication of EP2292139B1 publication Critical patent/EP2292139B1/en
Not-in-force 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
    • A47L15/4244—Water-level measuring or regulating 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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
    • A47L15/0023—Water filling
    • 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
    • A47L15/4225—Arrangements or adaption of recirculation or discharge pumps
    • 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
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/09—Water level
    • 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
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/05—Drain or recirculation pump, e.g. regulation of the pump rotational speed or flow direction

Definitions

  • the present invention refers to a process for controlling the operation of a dishwashing machine.
  • the latter comprises a washing tank closed at the bottom by a sump wherein a level sensor is present, a washing pump actuated by an electric motor which makes water circulate in the aforesaid tank and a control unit.
  • a dishwashing machine of this kind is disclosed by JP 2001 198 071 A .
  • DE 198 28 768 A1 discloses a process according to the preamble of claim 1 of the present application. According to this process:
  • the present objection has the objective of increasing the reliability of this known process.
  • control unit further checks the operation capability of said sensor by ascertaining that, during the water loading step, the measured value of the level of the water in the sump continuously increases.
  • the control process of the invention is based on the use by a control unit of signals generated by a component which is in any case present, such as the level sensor, and that hence does not lead to additional costs. Consequently, the production of a dishwashing machine adapted to operate according to the process of the invention results more economical. In particular, being certain of the correct functioning of the level sensor, the latter can also be used for monitoring the attainment of a watch level which causes the immediate shutdown of the dishwashing machine, without requiring dedicated anti-overflow devices, and with consequent further cost savings.
  • a dishwashing machine comprises a washing tank 10 closed at the bottom by a sump 12 in which a level sensor 14 is mounted.
  • a washing pump 16 driven by an asynchronous electric motor 18 causes the circulation of the water in the tank 10, while a further pump 20 allows its external discharge.
  • the operation of the dishwashing machine is governed by a control unit 22.
  • the level sensor 14 continuously measures the actual value of the water level in the sump 12 during the washing and rinsing steps, and transmits it to the control unit 22 which compares it with a reference value of the level of the water in the sump which is pre-established for each of such steps.
  • the control unit 22 can thus adjust the rotation speed of the motor 18 during the washing and rinsing steps in dependence on the difference existing between the actual value of the level of the water in the sump 12 and the pre-established reference value.
  • the adjustment of the rotation speed of the motor 18 can be carried out by changing the power absorbed through the phase shutting method.
  • the maximum power supplied by the phase shutter and absorbed by the motor 18 can be established by the control unit 22 in dependence on the requirements of the washing step, and in particular it can be greater the more intense the washing action must be.
  • the pressure sensor 14 functions correctly. Consequently, the operation of the latter is previously advantageously verified by the control unit, by ascertaining that, in the water loading step, the value measured by the sensor 14 of the level of the water in the sump 12 continuously increases.
  • the latter can be advantageously used also for monitoring the possibly rising of the water up to a watch level which causes the employment of emergency measures, such as the immediate shutdown of the dishwashing machine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
EP10175422.4A 2009-09-07 2010-09-06 Process for controlling the operation of a dishwashing machine Not-in-force EP2292139B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10175422T PL2292139T3 (pl) 2009-09-07 2010-09-06 Proces sterowania pracą zmywarki do naczyń

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTO2009A000684A IT1395418B1 (it) 2009-09-07 2009-09-07 Procedimento per il controllo del funzionamento di una macchina lavastoviglie.

Publications (2)

Publication Number Publication Date
EP2292139A1 EP2292139A1 (en) 2011-03-09
EP2292139B1 true EP2292139B1 (en) 2015-11-11

Family

ID=42097358

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10175422.4A Not-in-force EP2292139B1 (en) 2009-09-07 2010-09-06 Process for controlling the operation of a dishwashing machine

Country Status (3)

Country Link
EP (1) EP2292139B1 (it)
IT (1) IT1395418B1 (it)
PL (1) PL2292139T3 (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20111247A1 (it) * 2011-12-30 2013-07-01 Indesit Co Spa Lavastoviglie e metodo per la rilevazione di uno o più recipienti posizionati con concavità rivolte verso l'alto all'interno di detta lavastoviglie
ITTO20111246A1 (it) * 2011-12-30 2013-07-01 Indesit Co Spa Lavastoviglie e metodo per la rilevazione di schiuma all'interno di detta lavastoviglie
KR102000066B1 (ko) * 2013-02-28 2019-07-15 엘지전자 주식회사 식기세척기 및 그 제어방법

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3537970A1 (de) * 1985-10-25 1987-04-30 Licentia Gmbh Geschirrspuelmaschine
JP3293255B2 (ja) * 1993-08-30 2002-06-17 松下電器産業株式会社 食器洗い機
DE19828768C2 (de) * 1998-06-27 2002-12-05 Aeg Hausgeraete Gmbh Verfahren zum Betreiben einer Geschirrspülmaschine mit einer Umwälzpumpe
JP2001198071A (ja) * 2000-01-19 2001-07-24 Matsushita Electric Ind Co Ltd 食器洗浄機
DE10134916A1 (de) * 2001-07-18 2003-04-24 Aeg Hausgeraete Gmbh Haushaltsgerät mit einer einstellbaren Flüssigkeitsverteilungseinrichtung und Verfahren zu deren Kontrolle
DE102004050396A1 (de) * 2004-10-15 2006-04-27 Electrolux Home Products Corporation N.V. Wasserführendes Haushaltsgerät mit einer Abpumpeinrichtung und Verfahren zum Abpumpen

Also Published As

Publication number Publication date
EP2292139A1 (en) 2011-03-09
PL2292139T3 (pl) 2016-04-29
IT1395418B1 (it) 2012-09-14
ITTO20090684A1 (it) 2011-03-08

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