EP0546434A1 - Réglage du niveau pour une machine à laver la vaisselle - Google Patents

Réglage du niveau pour une machine à laver la vaisselle Download PDF

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Publication number
EP0546434A1
EP0546434A1 EP92120538A EP92120538A EP0546434A1 EP 0546434 A1 EP0546434 A1 EP 0546434A1 EP 92120538 A EP92120538 A EP 92120538A EP 92120538 A EP92120538 A EP 92120538A EP 0546434 A1 EP0546434 A1 EP 0546434A1
Authority
EP
European Patent Office
Prior art keywords
level
drain pan
liquid
control according
circulation pump
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
EP92120538A
Other languages
German (de)
English (en)
Other versions
EP0546434B1 (fr
Inventor
Karlheinz Kohles
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.)
AEG Hausgeraete GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
AEG Hausgeraete GmbH
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 Licentia Patent Verwaltungs GmbH, AEG Hausgeraete GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of EP0546434A1 publication Critical patent/EP0546434A1/fr
Application granted granted Critical
Publication of EP0546434B1 publication Critical patent/EP0546434B1/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
    • A47L15/4244—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
    • 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
    • A47L2501/01—Water supply, e.g. opening or closure of the water inlet valve

Definitions

  • the invention relates to a level control according to the preamble of claim 1.
  • a pressure switch is attached to the pressure port of a circulation pump provided for the circulation of the washing liquid, which registers a pressure drop in the pressure line when the circulation pump has its intake connection connected to a suction opening in the drain pan Sucking in air.
  • a water supply valve is opened by means of the pressure switch, through which fresh water is let into the rinsing tank and the drain pan while the circulation pump is running until the air intake is prevented and the spray pressure in the distribution system for the rinsing liquid required for correct operation is reached.
  • the minimum amount of liquid required to start operation is controlled by a separate level switch, which also acts on the water supply valve and, when the minimum liquid level is reached, cuts off the power supply to this solenoid valve and stops the water supply.
  • a separate level switch is placed in the control circuit of the water inlet valve, which interrupts the circuit for the solenoid valve and switches on a drain pump when a maximum level is reached.
  • the invention has for its object to provide a level control according to the preamble of claim 1, which manages with simplified control means.
  • a working level needs to be defined in the drain pan at which the circulation pump works without air intake.
  • the upper limit of the working level should lie below a sieve falling in a flat funnel shape and covering the drain pan, in order to avoid that dirt particles which are flushed through the sieve to the sieve combination leading centrally downwards and to a connecting piece for a drainage pump do not result from the fine perforation of the sieve Be crushed by suction. Since the cross-section of the drain pan is relatively small, the working tolerance or the switching cycle of the level sensor used for this purpose can lie between the above-mentioned limits, without this resulting in a considerable difference in the amount of flushing liquid.
  • fresh water is therefore only refilled if the predetermined working level is undershot due to disturbance variables.
  • the amount of water is therefore automatically adjusted depending on the amount of dishes, their wetting and retention capacity of washing liquid, changes in the flow rate, which can occur through the optional operation of one or more spray arms in the washing container, or also on tolerances or changes in the pipe characteristics in the liquid delivery system.
  • the disturbance factors are therefore compensated for in a simple manner.
  • the level sensor for scanning the working level can also be used to control a minimum water filling quantity.
  • the circulation pump can also be switched on at the start of the water supply, but to avoid drying out, it can initially remain switched off until the working level is reached. As soon as the circulation pump is switched on, the liquid level drops below the predetermined working level, so that the water supply valve is automatically opened until the working level is reached. Also in the course of operation disturbances that lead to a
  • a pressure switch with an upstream air trap chamber can be provided as the level sensor, this air trap chamber preferably being arranged manually accessible in the interior of the drain pan and providing access for the purpose of cleaning, which can be accomplished, for example, by opening or removing the air trap chamber.
  • a dishwashing container 1 of a dishwasher which is equipped with dishes (not shown) and spray arms (not shown) for receiving items to be washed, has an opening in its bottom 2 that slopes down, under which a drain pan 3 is seated.
  • the drain pan 3 is covered on its upper side by a fine sieve, which also falls inwards in the manner of a flat funnel and has a central opening 5.
  • a sieve arrangement 6 leads from the fine sieve 4 down to the bottom of the drain pan 3, this sieve arrangement consisting, for example, of a coarse sieve, a fine sieve and a fine sieve.
  • a suction line 10 leads radially from the space between the screen arrangement and the man tel of the drain pan 3 to a circulating pump 11, from which a pressure pipe 12 leads via a pipe, not shown, to at least one spray device in the washing container 1.
  • the suction line 10 is preceded within the drain pan 3 by a flow divider indicated at 13, which may possibly extend over the entire circumference of the drain pan 3 and leaves a suction opening 14 free.
  • the flow divider 13 serves to withdraw the amount of liquid drawn from the drain pan 3 as uniformly as possible from the individual sectors.
  • An air trap chamber 15 is also provided within the drain pan 3, which chamber is open at the bottom and ends at least just above the bottom 9.
  • a connecting line 16 leads from the air trap chamber 15 to a pressure switch 17, the switching device of which controls the control circuit for the magnetic coil 18 of a water supply valve 19 designed as an electromagnetic valve.
  • the water inlet valve lies in a fresh water line 20 which, after the water inlet valve, opens into the washing container 1 or also into the drain pan 3 or other line parts connected to it in flow.
  • the air trap chamber 15 forms a level sensor with the pressure switch 17, for which other components having the same effect can of course also be used, for example electrical contact paths or optical fill level sensors with an associated switching device.
  • the level sensor 15, 17 signals the lack of a sufficient liquid level in the drain pan 3 of the need for fresh water and therefore switches the water supply valve 19 into the open state via the solenoid 18, so that fresh water enters the rinsing container 1 and thus runs into the drain pan 3.
  • the water supply must be maintained at least until a minimum working level is reached, which is indicated at 21. This minimum working level is set so that the circulation pump 11 does not suck in air. Due to the switching hysteresis of the level sensor 15, 17, however, the level can continue to rise until the water supply valve is switched off and rise to just below the lower edge of the fine screen 4 in the region of the central opening 5, as indicated at 22.
  • the rinsing liquid drawn in by the circulating pump 10 in the drain pan will pull dirt particles through the fine sieve 4 and crush it at the fine perforation.
  • the distance between the minimum working level 21 and the maximum working level 22 corresponds to the switching hysteresis of the level sensor 15, 17. If the return flow of rinsing liquid is reduced to such an extent that the liquid level in the drain pan 3 falls below the minimum working level 21 in otherwise program-controlled operation due to contamination or other disturbance variables, for example a cup tilted upward with the opening, then the level sensor 15, 17 switches the water inlet valve 19 again in the open position until the upper working level is reached again.
  • the difference between the two working levels can be relatively large because the amount of water in between is correspondingly small due to the relatively small dimensions of the drain pan and can be neglected in comparison to the total amount of liquid for a rinse cycle.
  • a less precise and simpler level sensor 15, 17 can be used for this.
  • the level sensor can have normal, customary tolerances for pressure switch switches. The liquid level in the drain pan is thus kept constant within the switching tolerances, the minimum working level having to be above the highest section of the suction opening for the circulation pump.

Landscapes

  • Washing And Drying Of Tableware (AREA)
EP92120538A 1991-12-12 1992-12-02 Réglage du niveau pour une machine à laver la vaisselle Expired - Lifetime EP0546434B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4140949 1991-12-12
DE4140949A DE4140949C2 (de) 1991-12-12 1991-12-12 Niveausteuerung für eine Geschirrspülmaschine

Publications (2)

Publication Number Publication Date
EP0546434A1 true EP0546434A1 (fr) 1993-06-16
EP0546434B1 EP0546434B1 (fr) 1996-06-26

Family

ID=6446860

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92120538A Expired - Lifetime EP0546434B1 (fr) 1991-12-12 1992-12-02 Réglage du niveau pour une machine à laver la vaisselle

Country Status (2)

Country Link
EP (1) EP0546434B1 (fr)
DE (2) DE4140949C2 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1557651A1 (fr) 2004-01-21 2005-07-27 Electrolux Home Products Corporation N.V. Dispositif et méthode de contrôle du niveau d'un liquide contenu dans un appareil électroménager
WO2011015313A1 (fr) * 2009-08-05 2011-02-10 Electrolux Home Products Corporation N.V. Appareil de lavage, tel qu’un lave-vaisselle ou un lave-linge, et son procédé d’utilisation
US8161987B2 (en) 2003-12-22 2012-04-24 Bsh Bosch Und Siemens Hausgeraete Gmbh Dishwasher with a system for recognition of filling level
US8845814B2 (en) 2009-08-05 2014-09-30 Electrolux Home Products Corporation N.V. Washer such as a dishwasher or a washing machine and method for operating a washer
US9445705B2 (en) 2011-09-22 2016-09-20 Electrolux Home Products, Inc. Fluid inlet for controlled filling of a dishwasher
US9751115B2 (en) 2009-08-05 2017-09-05 Electrolux Home Products Corporation N.V. Washer such as a dishwasher or a washing machine and method for operating a washer
EP2116168B1 (fr) * 2008-05-09 2019-01-30 MEIKO Maschinenbau GmbH & Co. KG Dispositif de séparation d'impuretés doté d'un réglage de niveau

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4310403C2 (de) * 1993-03-31 1997-07-31 Aeg Hausgeraete Gmbh Geschirrspülmaschine mit einem Spülbehälter
DE4400877C2 (de) * 1994-01-14 1997-07-31 Aeg Hausgeraete Gmbh Verfahren zur Erkennung verschmutzter Siebe in Haushalt-Geschirrspülmaschinen
DE19548507B4 (de) * 1995-12-22 2004-03-25 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes, programmgesteuertes Haushaltgerät
DE19630357A1 (de) * 1996-07-26 1998-02-05 Aweco Kunststofftech Geraete Vorrichtung zur Regelung der Wassermenge in vorzugsweise Spülmaschinen
DE19736794C2 (de) * 1997-08-23 2000-04-06 Whirlpool Co Geschirrspülmaschine mit unterem und oberem Sprüharm und einer Umwälzpumpe
DE19845338C5 (de) * 1998-10-02 2012-12-13 Electrolux Rothenburg Gmbh Factory And Development Verfahren zum Betreiben einer Geschirrspülmaschine
DE19945925A1 (de) 1999-09-24 2001-03-29 Bsh Bosch Siemens Hausgeraete Wasserführendes Haushaltgerät
CN107854088A (zh) * 2017-11-24 2018-03-30 佛山市顺德区美的洗涤电器制造有限公司 水槽洗碗机及其清洗控制方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2646383A1 (de) * 1976-10-14 1978-04-20 Euro Hausgeraete Gmbh Vorrichtung fuer geschirrspuelmaschinen
GB2081751A (en) * 1980-08-12 1982-02-24 Bosch Siemens Hausgeraete Water Level Regulation in an Automatic Washing Machine
EP0248339A1 (fr) * 1986-06-04 1987-12-09 INDUSTRIE ZANUSSI S.p.A. Machine à laver avec dispositif de contrôle de l'alimentation en eau
EP0460250A1 (fr) * 1990-06-05 1991-12-11 MERLONI ELETTRODOMESTICI S.p.A. Machine à laver la vaisselle avec dispositif de réglage du niveau d'eau

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1503759A1 (de) * 1965-10-14 1969-04-17 Constructa Werke Gmbh Geschirrspuelmaschine
DE7004588U (de) * 1970-02-11 1970-07-16 Patzner Kg Fabrik F Maschinen Geschirrspuelmaschine.
DE2013716A1 (de) * 1970-03-21 1971-10-14 Bosch Hausgeraete Gmbh Geschirrspulmaschine
DE2730278A1 (de) * 1977-07-05 1979-01-25 Bosch Siemens Hausgeraete Verfahren zum fuellen des spuelbehaelters von geschirrspuelmaschinen mit spuelfluessigkeit
DE2929579C2 (de) * 1979-07-21 1984-05-17 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Wasserzulaufvorrichtung für Geschirrspülmaschinen
DE3537789A1 (de) * 1985-10-24 1987-04-30 Licentia Gmbh Verfahren und vorrichtung zum befuellen eines behaelters
DE3803006A1 (de) * 1988-02-02 1989-08-03 Hanning Elektro Werke Geschirrspuelmaschine
DE4026838A1 (de) * 1990-08-24 1992-03-05 Bosch Siemens Hausgeraete Haushalt-geschirrspuelmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2646383A1 (de) * 1976-10-14 1978-04-20 Euro Hausgeraete Gmbh Vorrichtung fuer geschirrspuelmaschinen
GB2081751A (en) * 1980-08-12 1982-02-24 Bosch Siemens Hausgeraete Water Level Regulation in an Automatic Washing Machine
EP0248339A1 (fr) * 1986-06-04 1987-12-09 INDUSTRIE ZANUSSI S.p.A. Machine à laver avec dispositif de contrôle de l'alimentation en eau
EP0460250A1 (fr) * 1990-06-05 1991-12-11 MERLONI ELETTRODOMESTICI S.p.A. Machine à laver la vaisselle avec dispositif de réglage du niveau d'eau

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8161987B2 (en) 2003-12-22 2012-04-24 Bsh Bosch Und Siemens Hausgeraete Gmbh Dishwasher with a system for recognition of filling level
EP1557651A1 (fr) 2004-01-21 2005-07-27 Electrolux Home Products Corporation N.V. Dispositif et méthode de contrôle du niveau d'un liquide contenu dans un appareil électroménager
EP2116168B1 (fr) * 2008-05-09 2019-01-30 MEIKO Maschinenbau GmbH & Co. KG Dispositif de séparation d'impuretés doté d'un réglage de niveau
WO2011015313A1 (fr) * 2009-08-05 2011-02-10 Electrolux Home Products Corporation N.V. Appareil de lavage, tel qu’un lave-vaisselle ou un lave-linge, et son procédé d’utilisation
EP2283759A1 (fr) * 2009-08-05 2011-02-16 Electrolux Home Products Corporation N.V. Dispositif de lavage, tel qu'un lave-vaisselle ou une machine à laver, et procédé de fonctionnement d'un tel dispositif
US8845813B2 (en) 2009-08-05 2014-09-30 Electrolux Home Products Corporation N.V. Washer, such as a dishwasher or a washing machine, and method for operating a washer
US8845814B2 (en) 2009-08-05 2014-09-30 Electrolux Home Products Corporation N.V. Washer such as a dishwasher or a washing machine and method for operating a washer
RU2543466C2 (ru) * 2009-08-05 2015-02-27 Электролюкс Хоум Продактс Корпорейшн Н.В. Моечная машина, такая как посудомоечная машина или стиральная машина, и способ эксплуатации моечной машины
US9751115B2 (en) 2009-08-05 2017-09-05 Electrolux Home Products Corporation N.V. Washer such as a dishwasher or a washing machine and method for operating a washer
US9445705B2 (en) 2011-09-22 2016-09-20 Electrolux Home Products, Inc. Fluid inlet for controlled filling of a dishwasher

Also Published As

Publication number Publication date
DE59206658D1 (de) 1996-08-01
DE4140949C2 (de) 1996-07-11
DE4140949A1 (de) 1993-06-17
EP0546434B1 (fr) 1996-06-26

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