EP0546434B1 - 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
EP0546434B1
EP0546434B1 EP92120538A EP92120538A EP0546434B1 EP 0546434 B1 EP0546434 B1 EP 0546434B1 EP 92120538 A EP92120538 A EP 92120538A EP 92120538 A EP92120538 A EP 92120538A EP 0546434 B1 EP0546434 B1 EP 0546434B1
Authority
EP
European Patent Office
Prior art keywords
level
drainage trough
drain pan
water supply
filter
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.)
Expired - Lifetime
Application number
EP92120538A
Other languages
German (de)
English (en)
Other versions
EP0546434A1 (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
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 AEG Hausgeraete GmbH filed Critical AEG Hausgeraete 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 the first claim.
  • a known level control of this type (EP 0 460 250 A1) has a level sensor with an air trap chamber and a pneumatic pressure switch.
  • the air trap chamber detects the pressure conditions in an emptying line which leads from a drain pan arranged below the bottom of a washing container of a dishwasher to an emptying pump.
  • the drain line opens from below into a sieve tube located inside the drain pan, which stands between the bottom of the drain pan and the sieve provided with a corresponding central opening and covering the drain pan.
  • the level sensor detects the working level in the vertical sieve section.
  • 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 supply 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 take a level control according to the preamble of the first claim measures by which a minimum amount of flushing fluid required for the proper operation of the circulation pump is controlled.
  • the level sensor is arranged so that it Working level in the space between the screen assembly and the jacket of the drain pan detected, the circulating pump sucks the liquid to be circulated from this space.
  • the level sensor then signals a switch-on signal to the water supply valve when the working level in this intermediate space, which is necessary for the proper functioning of the circulation pump, is undershot.
  • 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 an emptying 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. In this embodiment, fresh water is thus only refilled if the predetermined working level is undershot due to disturbance variables.
  • the amount of water is 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 amount of water.
  • the circulating pump can also be switched on at the beginning 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.
  • 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 cleaning purposes, 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 dishwasher racks and spray arms (not shown) for receiving items to be washed, has an opening in its bottom 2 which slopes downwards, under which a drain pan 3 is seated.
  • the drain pan 3 is covered on its upper side by a fine sieve, which also drops 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 very fine sieve.
  • a suction line 10 leads radially from the space between the sieve arrangement and the jacket of the drain pan 3 to a circulating pump 11, from which a pressure connection 12 leads via a pipeline (not shown) to at least one spray device in the washing container 1.
  • the intake line 10 is preceded by a flow divider, indicated at 13, within the drain pan 3, which can possibly extend over the entire circumference of the drain pan 3 and leaves a suction opening 14 free.
  • the flow divider 13 serves to ensure that the amount of liquid drawn from the drain pan 3 is as uniform as possible for the individual To withdraw 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 solenoid 18 of a water inlet 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 rinsing container 1 or also into the drain pan 3 or other line parts connected therewith in flow connection.
  • the air trap chamber 15 forms with the pressure switch 17 a level sensor for which other components having the same effect can of course also be used, for example electrical contact paths or optical 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 inlet 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.
  • the level can continue to rise until the water inlet 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 minimum working level 21 and the maximum Working level 22 corresponds to the switching hysteresis of level sensor 15, 17.
  • 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 compared to the total amount of liquid for a wash 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)

Claims (3)

  1. Commande de niveau pour le niveau de liquide dans une machine à laver la vaisselle comprenant un bac d'évacuation (3) disposé en dessous du fond (9) d'une cuve de lavage (1), bac qui présente un tamis (4) supérieur recouvrant la face supérieure du bac d'évacuation (3) et comprenant une ouverture centrale (5) et au moins un tamis (6) allant vers le bas en direction du fond (9), dont l'espace interne est raccordé à une conduite de vidange (7) s'éloignant du fond (9), machine comprenant une pompe de circulation (11) programmable, qui est raccordée, dans la zone du fond (9) du bac d'évacuation (3), par l'intermédiaire d'une ouverture d'aspiration (14), à l'espace entre le dispositif de tamis (4, 6) et l'enveloppe du bac d'évacuation (3), cette pompe étant destinée au liquide de lavage et une sonde de niveau (15, 17) qui maîtrise le circuit de commande d'une vanne d'arrivée d'eau (19), la vanne d'arrivée d'eau (19) étant ouverte aussi longtemps et dès que le niveau de liquide est en dessous d'un niveau de travail (21) prédéterminé, caractérisée en ce que la sonde de niveau (15, 17) relève le niveau de travail (21) dans l'espace entre le dispositif de tamis (4, 6) et l'enveloppe du bac d'évacuation (3).
  2. Commande de niveau selon la revendication 1, caractérisée en ce que, dans l'espace entre le dispositif de tamis (4, 6) et l'enveloppe du bac d'évacuation, est disposée une chambre de chute d'air (15) qui est ouverte en dessous du niveau de travail (21) minimal, qui se trouve au-dessus de l'ouverture d'aspiration (14) et en dessous du tamis (4) recouvrant le bac d'évacuation (3), et qui est raccordée à un interrupteur manométrique (17) qui régule le circuit de commande de la vanne d'arrivée d'eau (19).
  3. Commande de niveau selon la revendication 2, caractérisée en ce que la chambre de chute d'air (15) est accessible manuellement depuis l'intérieur du bac d'évacuation (3), est disposée de manière amovible et est prévue pour être ouverte.
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 EP0546434A1 (fr) 1993-06-16
EP0546434B1 true 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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19736794A1 (de) * 1997-08-23 1999-02-25 Whirlpool Co Geschirrspülmaschine mit unterem und oberem Sprüharm und einer Umwälzpumpe
US6851312B2 (en) 1999-09-24 2005-02-08 Bsh Bosch Und Siemens Hausgerate Gmbh Water-bearing household appliance

Families Citing this family (13)

* 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
DE19845338C5 (de) * 1998-10-02 2012-12-13 Electrolux Rothenburg Gmbh Factory And Development Verfahren zum Betreiben einer Geschirrspülmaschine
DE10360554A1 (de) 2003-12-22 2005-07-14 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit einem System zur Füllstandserkennung
DE102004003077A1 (de) 2004-01-21 2005-08-11 Electrolux Home Products Corp. N.V. Vorrichtung und Verfahren zur Niveauüberwachung in einem flüssigkeitsführenden Haushaltsgerät
DE102008022960A1 (de) * 2008-05-09 2009-11-12 Meiko Maschinenbau Gmbh & Co. Kg Schmutzabscheider-Einrichtung mit Niveauregelung
EP2283760A1 (fr) 2009-08-05 2011-02-16 Electrolux Home Products Corporation N.V. Laveuse, telle qu'un lave-vaisselle ou une machine à laver, et procédé de fonctionnement d'une telle laveuse
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
EP2283759B1 (fr) * 2009-08-05 2015-04-29 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
US9445705B2 (en) 2011-09-22 2016-09-20 Electrolux Home Products, Inc. Fluid inlet for controlled filling of a dishwasher
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

Family Cites Families (12)

* 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
DE2646383C2 (de) * 1976-10-14 1986-01-23 Bauknecht Hausgeräte GmbH, 7000 Stuttgart Steuervorrichtung für eine programmgesteuerte Geschirrspülmaschine
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
DE3030501C2 (de) * 1980-08-12 1985-09-05 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Einrichtung zum Regeln des Wasserstandes in einer Trommelwaschmaschine
DE3537789A1 (de) * 1985-10-24 1987-04-30 Licentia Gmbh Verfahren und vorrichtung zum befuellen eines behaelters
IT1192084B (it) * 1986-06-04 1988-03-31 Zanussi Elettrodomestici Macchina lavatrice con sistema di controllo del carico d'acqua
DE3803006A1 (de) * 1988-02-02 1989-08-03 Hanning Elektro Werke Geschirrspuelmaschine
ES2076991T3 (es) * 1990-06-05 1995-11-16 Merloni Elettrodomestici Spa Maquina lavaplatos con dosificacion mejorada del agua de lavado.
DE4026838A1 (de) * 1990-08-24 1992-03-05 Bosch Siemens Hausgeraete Haushalt-geschirrspuelmaschine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19736794A1 (de) * 1997-08-23 1999-02-25 Whirlpool Co Geschirrspülmaschine mit unterem und oberem Sprüharm und einer Umwälzpumpe
DE19736794C2 (de) * 1997-08-23 2000-04-06 Whirlpool Co Geschirrspülmaschine mit unterem und oberem Sprüharm und einer Umwälzpumpe
US6851312B2 (en) 1999-09-24 2005-02-08 Bsh Bosch Und Siemens Hausgerate Gmbh Water-bearing household appliance

Also Published As

Publication number Publication date
EP0546434A1 (fr) 1993-06-16
DE59206658D1 (de) 1996-08-01
DE4140949C2 (de) 1996-07-11
DE4140949A1 (de) 1993-06-17

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