EP0405086A1 - Method for operating a program-controlled dishwasher - Google Patents

Method for operating a program-controlled dishwasher Download PDF

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Publication number
EP0405086A1
EP0405086A1 EP90107765A EP90107765A EP0405086A1 EP 0405086 A1 EP0405086 A1 EP 0405086A1 EP 90107765 A EP90107765 A EP 90107765A EP 90107765 A EP90107765 A EP 90107765A EP 0405086 A1 EP0405086 A1 EP 0405086A1
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Prior art keywords
program
ion exchanger
sub
cleaning
rinsing
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EP90107765A
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German (de)
French (fr)
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EP0405086B1 (en
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Rüdiger Dipl.-Ing. Eiermann (FH)
Wolfgang Dipl.-Ing. Steck
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BOSCH-SIEMENS HAUSGERAETE GMBH
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Individual
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    • 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
    • A47L15/4229—Water softening arrangements

Definitions

  • the invention relates to a method for operating a program-controlled dishwasher, with a softening device consisting of an ion exchanger, a salt reservoir and a regeneration water reservoir, the dishwasher with from the sub-programs - pre-rinsing, cleaning, rinsing, rinsing, drying, adding a brine quantity Regeneration of the ion exchanger and addition of an amount of backwash water to rinse out the exchanged hardness formers from the regenerated ion exchanger - selectable wash programs can be operated.
  • a method and a program-controlled dishwasher of the type mentioned above are known from DE-OS 33 16 685, the sub-program adding a brine quantity for regenerating the ion exchanger being shown during the sub-program drying and the sub-program adding a backwash water quantity for rinsing out the exchanged hardness agents from the regenerated Ion exchanger is carried out at the beginning of the program of a subsequent next rinsing program.
  • the invention has for its object to be able to use water with the lowest water hardness in a method of the type mentioned for the sub-program rinse aid.
  • This object is achieved in that the sub-program adding a brine quantity to regenerate the ion exchanger is displayed during or after the sub-program cleaning and then the sub-program adding a back-flushing water quantity to rinse out the sub-program cleaning supplemented by the sub-program adding a brine quantity to regenerate the ion exchanger exchanged hardness agent from the regenerated ion exchanger follows.
  • the invention is based on the knowledge that the best softening result is achieved with a freshly regenerated ion exchanger after sufficient backwash water has been added.
  • the amount of backwashing water added in the sub-program adding a backwashing water to rinse out the exchanged hardness formers from the regenerated ion exchanger is usually limited to a small amount of water to avoid an extension of the program execution time and unnecessary water consumption, which only the majority of the hardness formulators wash out from the ion exchanger.
  • This rinsing of the ion exchanger is then continued in a subsequent sub-program without the addition of detergent in order to avoid dilution of the detergent by brine components which may have been rinsed out.
  • water softened by the ion exchanger is also used to improve the cleaning result, in particular when a cleaner is added.
  • the degree of hardness of the water used is not as important as for the rinse sub-program.
  • a brine quantity for regenerating the ion exchanger during the cleaning sub-program is stored in a storage container and derived at the end of the cleaning sub-program or after the cleaning sub-program, bypassing the ion exchanger.
  • a direct discharge of the amount of brine flowing from the ion exchanger during cleaning causes the cleaning agent used for cleaning to dilute and a repeated passage through the ion exchanger leads to its back soiling, both of which are therefore avoided with the advantageous measure.
  • the amount of brine flowing out of the ion exchanger is stored in the filling container.
  • the filling container is empty after the start of the cleaning sub-program, it can be used to store the brine quantity. An additional container is thus avoided and the possibility is created without additional control means, e.g. Valves etc. bypassing the ion exchanger to discharge the stored amount of brine.
  • the program sequence shown in the figure consists of the sub-programs pre-rinsing, cleaning, intermediate rinsing, rinsing, drying, adding a brine quantity to regenerate the ion exchanger and adding a backwashing water quantity for flushing out the exchanged hardness formers from the regenerated ion exchanger.
  • the program sequence diagram in the figure shows the periods of the functions of the components of the dishwasher that are essential for the program sequence, a control unit motor of a program control unit, a circulation pump, a drain pump, a regeneration valve, a filler valve and a heater in assigned columns, the division into Intervals shows the switching steps of the program control unit.
  • the functions of the dishwasher are like marked as follows: F for filling the dishwasher with water by opening the inlet valve; U for circulating the water possibly mixed with a detergent or rinse aid through the circulating pump; H for heating the water by means of the heater; Reg.
  • t denotes the program time sequence.
  • T1 denotes the time period for a first pre-rinse sub-program and t2 denotes the time period for a second pre-rinse sub-program.
  • the cleaning sub-program takes place in the period t3.
  • the sub-program adding a brine quantity for regenerating the ion exchanger is shown, in the figure with I and by means of a hatched field in the regeneration valve column, the time of the initiation of the sub-program adding a brine quantity for regenerating the ion exchanger during the sub-program Clean and with II and by means of a filled-in field in the regeneration valve column the alternatively possible arrangement of the sub-program adding a brine quantity for regenerating the ion exchanger is shown at the end of the sub-program cleaning.
  • the amount of brine is stored in a storage container and discharged at the end of the cleaning sub-program to reduce the back contamination of the ion exchanger bypassing the ion exchanger.
  • a filling valve arranged at the outlet of the filling container is opened by opening the filling valve or, if the filling container is emptied by a siphon, after the cleaning sub-program, adding a backwash water quantity in the subsequent sub-program in the subsequent sub-program according to the invention for rinsing out the exchanged hardness formers from the regenerated ion exchanger, the temporarily stored amount of brine is discharged.
  • the period of time of the sub-program following the sub-program cleaning is added by adding a quantity of backwash water for rinsing out the exchanged hardness formers from the regenerated ion exchanger.
  • the time period for the intermediate rinse program is specified with t5, the time period for rinse aid with t6.
  • the period for the drying sub-program is designated t7.
  • the rinse-aid sub-program is carried out after the intermediate rinse sub-program in which the backwashing of the ion exchanger has been completed, that is to say with the water softened from the regenerated ion exchanger to the lowest degree.

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  • Washing And Drying Of Tableware (AREA)
  • Detergent Compositions (AREA)

Abstract

To provide water of the lowest water hardness for the clear-rinse subprogram, in a program-controlled dish-washing machine having a softening device, consisting of an ion exchanger, a salt-supply container and a regenerating water supply container, this dish-washing machine being actuable by means of rinsing programs selectable from the following subprograms: prerinsing, cleaning, intermediate rinsing, clear rinsing, drying, addition of a quantity of brine for regenerating the ion exchanger and addition of a quantity of rerinsing water for rinsing out the exchanged hardness formers from the regenerated ion exchanger, the subprogram for addition of a quantity of brine for regenerating the ion exchanger is incorporated during or after the cleaning subprogram, and the cleaning subprogram, supplemented by the subprogram for addition of a quantity of brine for regenerating the ion exchanger is followed by the subprogram for addition of a quantity of rerinsing water for rinsing out the exchanged hardness formers from the regenerated ion exchanger. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zum Betrieb einer programmgesteuerten Geschirrspülmaschine, mit einer Enthärtungseinrichtung, bestehend aus einem Ionenaustauscher, einem Salzvorratsbehälter und einem Regenerierwasser-Vorrats­behälter, wobei die Geschirrspülmaschine mit aus den Teilprogrammen - Vorspülen, Reinigen, Zwischenspülen, Klarspülen, Trocknen, Zugabe einer Solemenge zum Regenerieren des Ionenaustauschers und Zugabe einer Rückspülwassermenge zum Ausspülen der ausgetauschten Härtebildner aus dem regenerierten Ionenaustauscher - wählbaren Spülprogrammen betätigbar ist.The invention relates to a method for operating a program-controlled dishwasher, with a softening device consisting of an ion exchanger, a salt reservoir and a regeneration water reservoir, the dishwasher with from the sub-programs - pre-rinsing, cleaning, rinsing, rinsing, drying, adding a brine quantity Regeneration of the ion exchanger and addition of an amount of backwash water to rinse out the exchanged hardness formers from the regenerated ion exchanger - selectable wash programs can be operated.

Ein Verfahren und eine programmgesteuerte Geschirrspülmaschine der obengenannten Art ist aus der DE-OS 33 16 685 bekannt, wobei das Teilprogramm Zugabe einer Solemenge zum Regenerieren des Ionenaustauschers während dem Teilprogramm Trocknen eingeblendet ist und das Teilprogramm Zugabe einer Rückspülwassermenge zum Ausspülen der ausgetauschten Härtebildner aus dem regenerierten Ionenaustau­scher am Programmbeginn eines nachfolgenden nächsten Spülprogrammes durchge­führt wird.A method and a program-controlled dishwasher of the type mentioned above are known from DE-OS 33 16 685, the sub-program adding a brine quantity for regenerating the ion exchanger being shown during the sub-program drying and the sub-program adding a backwash water quantity for rinsing out the exchanged hardness agents from the regenerated Ion exchanger is carried out at the beginning of the program of a subsequent next rinsing program.

Bei dem in der DE-OS 33 16 685 gezeigten Verfahren werden alle Teilprogramme mit enthärtetem Wasser durchgeführt, so daß, da das Teilprogramm Zugabe einer Solemenge zum Regenerieren des Ionenaustauschers kurz vor Ende eines vorher abge­laufenen Spülprogrammes durchgeführt wird, in dem Teilprogramm Klarspülen, das im Gesamtablauf des Spülprogrammes erst an vierter Stelle steht, im Ionenaustau­scher eine Zunahme der ausgetauschten Härtebildner stattgefunden hat, die dazu führt, daß zum Teilprogramm Klarspülen ein Wasser verwendet werden muß, das eine entsprechend hohe Wasserhärte hat. Besonders beim Teilprogramm Klarspülen ist der Einsatz von Wasser mit möglichst niedriger Wasserhärte notwendig, um beim an­schließenden Teilprogramm Trocknen ein Auftreten von Kalkrückständen auf dem in die Geschirrspülmaschine eingelagerten Geschirr zu vermeiden.In the process shown in DE-OS 33 16 685, all sub-programs are carried out with softened water, so that, since the sub-program adding a quantity of brine to regenerate the ion exchanger is carried out shortly before the end of a previously run-off rinsing program, rinse-aid in the sub-program which is in the The overall course of the rinsing program is only in fourth place, in the ion exchanger there has been an increase in the amount of hardness exchanged, which means that a water must be used for the rinse-aid sub-program that has a correspondingly high water hardness. Especially with the rinse aid sub-program, water with the lowest possible water hardness is necessary in order to prevent limescale deposits from appearing on the dishes stored in the dishwasher during the subsequent sub-program drying.

Der Erfindung liegt die Aufgabe zugrunde, bei einem Verfahren der eingangs ge­nannten Art für das Teilprogramm Klarspülen Wasser mit der niedrigsten Wasserhär­te verwenden zu können.The invention has for its object to be able to use water with the lowest water hardness in a method of the type mentioned for the sub-program rinse aid.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß während oder nach dem Teilprogramm Reinigen das Teilprogramm Zugabe einer Solemenge zum Regenerieren des Ionenaustauschers eingeblendet wird und anschließend an das um das Teilpro­gramm Zugabe einer Solemenge zum Regenerieren des Ionenaustauschers ergänzte Teilprogramm Reinigen das Teilprogramm Zugabe einer Rückspülwassermenge zum Ausspülen der ausgetauschten Härtebildner aus dem regenerierten Ionenaustauscher folgt.This object is achieved in that the sub-program adding a brine quantity to regenerate the ion exchanger is displayed during or after the sub-program cleaning and then the sub-program adding a back-flushing water quantity to rinse out the sub-program cleaning supplemented by the sub-program adding a brine quantity to regenerate the ion exchanger exchanged hardness agent from the regenerated ion exchanger follows.

Die Erfindung geht von der Erkenntnis aus, daß das beste Enthärtungsergebnis mit einem frisch regeneriertem Ionenaustauscher nach ausreichender Zugabe von Rück­spülwasser erzielt wird. Die im Teilprogramm Zugabe einer Rückspülwassermenge zum Ausspülen der ausgetauschten Härtebildner aus dem regenerierten Ionenaustau­scher zugegebene Rückspülwassermenge ist üblicherweise zur Vermeidung einer Ver­längerung der Programmablaufzeit und unnötigen Wasserverbrauchs auf eine geringe Wassermenge begrenzt, die nur den größten Teil der Härtebildner aus dem Ionenaus­tauscher ausspült. Dieses Durchspülen des Ionenaustauschers wird dann in einem nachfolgenden Teilprogramm ohne Reinigerzugabe, um eine Verdünnung des Reinigers durch evtl. ausgespülte Solebestandteile zu vermeiden, fortgesetzt. In dem bekannten Verfahren nach DE-OS 33 16 685 erfolgt dies während dem Teilprogramm Vorspü­len, bei dem erfindungsgemäßen Verfahren während des Teilprogramms Zwischenspü­len. Daher ist es durch die Einblendung des Teilprogrammes Zugabe einer Solemenge zum Regenerieren des Ionenaustauschers während oder nach dem Teilprogramm Rei­nigen möglich, bei dem Teilprogramm Klarspülen die Geschirrspülmaschine mit der niedrigst möglichen Wasserhärte zu betreiben. Weiterhin wird durch das an das Teil­programm Reinigen anschließende Teilprogramm Zugabe einer Rückspülwassermenge zum Ausspülen der ausgetauschten Härtebildner die im Pumpensumpf verbliebenen Speisereste aus dem Geschirrspüler gepumpt bevor das Teilprogramm Zwischenspülen beginnt. Dies verhindert eine Rückanschmutzung des Geschirrs beim Zwischenspül­gang.The invention is based on the knowledge that the best softening result is achieved with a freshly regenerated ion exchanger after sufficient backwash water has been added. The amount of backwashing water added in the sub-program adding a backwashing water to rinse out the exchanged hardness formers from the regenerated ion exchanger is usually limited to a small amount of water to avoid an extension of the program execution time and unnecessary water consumption, which only the majority of the hardness formulators wash out from the ion exchanger. This rinsing of the ion exchanger is then continued in a subsequent sub-program without the addition of detergent in order to avoid dilution of the detergent by brine components which may have been rinsed out. In the known method according to DE-OS 33 16 685, this takes place during the pre-rinse sub-program, in the method according to the invention during the sub-rinse sub-program. It is therefore possible, by inserting the sub-program to add a brine quantity to regenerate the ion exchanger during or after the sub-program cleaning, to operate the dishwasher with the lowest possible water hardness in the sub-program rinse aid. Furthermore, by adding a backwash amount of water to rinse out the exchanged hardness constituents after the part program cleaning, the food residues remaining in the pump sump are pumped out of the dishwasher before the part program intermediate rinsing begins. This prevents the dishes from becoming dirty again during the intermediate wash cycle.

Für die am Anfang eines neuen Programmablaufes und vor oder während des neuer­lichen Regenerierens des Ionenaustauschers liegenden Teilprogramms Vorspülen und Reinigen wird zur Verbesserung des Reinigungsergebnisses, insbesondere bei Beimi­schung eines Reinigers, auch durch den Ionenaustauscher enthärtetes Wasser verwen­det. Hierzu ist aber erfahrungsgemäß der Härtegrad des verwendeten Wassers nicht von der entscheidenden Bedeutung wie für das Teilprogramm Klarspülen.For the pre-rinsing and cleaning sub-program at the beginning of a new program sequence and before or during the renewed regeneration of the ion exchanger, water softened by the ion exchanger is also used to improve the cleaning result, in particular when a cleaner is added. Experience has shown, however, that the degree of hardness of the water used is not as important as for the rinse sub-program.

In vorteilhafter Ausführung wird beim Einblenden des Teilprogrammes Zugabe einer Solemenge zum Regenerieren des Ionenaustauschers während des Teilprogrammes Reinigen die aus dem Ionenaustauscher zurückfließende Solemenge in einem Vorrats­behälter gespeichert und am Ende des Teilprogrammes Reinigen oder nach dem Teilprogramm Reinigen unter Umgehung des Ionenaustauschers abgeleitet.In an advantageous embodiment, when the sub-program is added, a brine quantity for regenerating the ion exchanger during the cleaning sub-program, the brine quantity flowing back from the ion exchanger is stored in a storage container and derived at the end of the cleaning sub-program or after the cleaning sub-program, bypassing the ion exchanger.

Ein direktes Ausleiten der aus dem Ionenaustauscher fließenden Solemenge während des Reinigens verursacht eine Verdünnung des zum Reinigen verwendeten Reini­gungsmittels und ein nochmaliges Durchleiten durch den Ionenaustauscher führt zu dessen Rückanschmutzung, beides wird deshalb mit der vorteilhaften Maßnahme ver­mieden.A direct discharge of the amount of brine flowing from the ion exchanger during cleaning causes the cleaning agent used for cleaning to dilute and a repeated passage through the ion exchanger leads to its back soiling, both of which are therefore avoided with the advantageous measure.

Nach einer weiteren vorteilhaften Ausführung wird bei einer Geschirrspülmaschine, die mit einem Einfüllbehälter, der mit Wasser aus dem Ionenaustauscher füllbar ist, ausgestattet ist, die aus dem Ionenaustauscher ausfließende Solemenge in dem Ein­füllbehälter gespeichert.According to a further advantageous embodiment, in a dishwasher which is equipped with a filling container which can be filled with water from the ion exchanger, the amount of brine flowing out of the ion exchanger is stored in the filling container.

Da der Einfüllbehälter nach dem Beginn des Teilprogramms Reinigen leer ist, kann dieser zur Speicherung der Solemenge verwendet werden. Damit wird ein zusätzlicher Behälter vermieden und die Möglichkeit geschaffen, ohne zusätzliche Steuermittel, z.B. Ventile etc. unter Umgehung des Ionenaustauschers die gespeicherte Solemenge abzuleiten.Since the filling container is empty after the start of the cleaning sub-program, it can be used to store the brine quantity. An additional container is thus avoided and the possibility is created without additional control means, e.g. Valves etc. bypassing the ion exchanger to discharge the stored amount of brine.

Anhand der Zeichnung wird im folgenden das erfindungsgemäße Verfahren näher er­läutert.

  • Die Figur zeigt ein Programmablauf-Diagramm.
The method according to the invention is explained in more detail below with reference to the drawing.
  • The figure shows a program flow diagram.

Bei einer programmgesteuerten Geschirrspülmaschine, mit einer Enthärtungseinrich­tung, bestehend aus einem Ionenaustauscher, einem Salzvorratsbehälter und einem Regenerierwasser-Vorratsbehälter ist der in der Figur gezeigte Programmablauf aus den Teilprogrammen Vorspülen, Reinigen, Zwischenspülen, Klarspülen, Trocknen, Zu­gabe einer Solemenge zum Regenerieren des Ionenaustauschers und Zugabe einer Rückspülwassermenge zum Ausspülen der ausgetauschten Härtebildner aus dem rege­nerierten Ionenaustauscher wählbar. In dem Programmablauf-Diagramm in der Figur sind die Zeiträume der Funktionen der für den Programmablauf wesentlichen Be­standteile der Geschirrspülmaschine, eines Steuergerätemotors eines Programmsteuer­geräts, einer Umwälzpumpe, einer Laugenpumpe, eines Regenerierventils, eines Ein­füllventils und einer Heizung in zugeordneten Spalten dargestellt, wobei die Eintei­lung in Zeitabständen die Schaltschritte des Programmsteuergerätes zeigt. In einer weiteren Spalte Funktionsabläufe sind die Funktionen der Geschirrspülmaschine wie folgt gekennzeichnet: F für Füllen der Geschirrspülmaschine mit Wasser durch off­nen des Einlaufventiles; U für Umwälzen des evtl. mit einem Reiniger oder Klarspü­ler vermischten Wassers durch die Umwälzpumpe; H für Heizen des Wassers mittels der Heizung; Reg. für das Teilprogramm Zugabe einer Solemenge zum Regenerieren des Ionenaustauschers, das durch Öffnen des Regenerierventils eingeleitet wird; D für Durchspülen des Ionenaustauschers; und T für Trocknen. In dem Programmab­lauf-Diagramm in der Figur ist mit t der Programmzeitablauf bezeichnet. Mit t1 ist der Zeitraum für ein erstes Vorspül-Teilprogramm und mit t2 der Zeitraum für ein zweites Vorspül-Teilprogramm bezeichnet. Das Teilprogramm Reinigen findet in dem Zeitraum t3 statt. In dem Zeitraum des Teilprogrammes Reinigen t3 ist das Teil­programm Zugabe einer Solemenge zum Regenerieren des Ionenaustauschers einge­blendet, wobei in der Figur mit I und mittels eines schraffierten Feldes in der Spalte Regenerierventil der Zeitpunkt der Einleitung des Teilprogrammes Zugabe ei­ner Solemenge zum Regenerieren des Ionenaustauschers während des Teilprogrammes Reinigen und mit II und mittels eines ausgefüllten Feldes in der Spalte Regenerier­ventil die alternativ mögliche Anordnung des Teilprogrammes Zugabe einer Solemen­ge zum Regenerieren des Ionenaustauschers am Ende des Teilprogrammes Reinigen gezeigt ist. Um sicherzustellen, daß bei Einblendung des Teilprogramms Zugabe einer Solemenge zum Regenerieren des Ionennaustauschers während des Teilprogramms Reinigen die aus dem Ionenaustauscher ausfließende Solemenge nicht während des Reinigungsprozesses mit der Reinigerflüssigkeit vermischt wird, was bekannterweise zu einer Verdünnung der Reinigerflüssigkeit und damit zu einer Verschlechterung des Reinigungsergebnisses führt, wird die Solemenge in einem Vorratsbehälter gespei­chert und am Ende des Teilprogramms Reinigen zur Verminderung der Rückan­schmutzung des Ionenaustauschers unter Umgehung des Ionenaustauschers abgeleitet. Bei Geschirrspülmaschinen, die mit einem Einfüllbehälter, der mit Wasser aus dem Ionenaustauscher füllbar ist, ausgestattet ist, wird, da nach dem Beginn des Teilpro­gramms Reinigen der Einfüllbehälter leer ist, dieser als Vorratsbehälter zur Zwi­schenspeicherung der aus dem Ionenaustauscher ausfließenden Solemenge verwendet. Am Ende des Teilprogrammes Reinigen wrid bei einem am Ausgang des Einfüllbehäl­ters angeordneten Einfüllventil durch Öffnen des Einfüllventils oder, wenn der Ein­füllbehälter, wie auch bekannt, durch einen Saugheber entleert wird, nach dem Teil­programm Reinigen beim neuerlichen Füllen des Einfüllbehälters im erfindungsgemäß anschließenden Teilprogramm Zugabe einer Rückspülwassermenge zum Ausspülen der ausgetauschten Härtebildner aus dem regenerierten Ionenaustauscher, die zwischenge­speicherte Solemenge ausgeleitet.In the case of a program-controlled dishwasher, with a softening device consisting of an ion exchanger, a salt storage container and a regeneration water storage container, the program sequence shown in the figure consists of the sub-programs pre-rinsing, cleaning, intermediate rinsing, rinsing, drying, adding a brine quantity to regenerate the ion exchanger and adding a backwashing water quantity for flushing out the exchanged hardness formers from the regenerated ion exchanger. The program sequence diagram in the figure shows the periods of the functions of the components of the dishwasher that are essential for the program sequence, a control unit motor of a program control unit, a circulation pump, a drain pump, a regeneration valve, a filler valve and a heater in assigned columns, the division into Intervals shows the switching steps of the program control unit. In another column, functional sequences, the functions of the dishwasher are like marked as follows: F for filling the dishwasher with water by opening the inlet valve; U for circulating the water possibly mixed with a detergent or rinse aid through the circulating pump; H for heating the water by means of the heater; Reg. For the sub-program adding a quantity of brine to regenerate the ion exchanger, which is initiated by opening the regeneration valve; D for flushing the ion exchanger; and T for drying. In the program flow diagram in the figure, t denotes the program time sequence. T1 denotes the time period for a first pre-rinse sub-program and t2 denotes the time period for a second pre-rinse sub-program. The cleaning sub-program takes place in the period t3. In the period of the sub-program cleaning t3, the sub-program adding a brine quantity for regenerating the ion exchanger is shown, in the figure with I and by means of a hatched field in the regeneration valve column, the time of the initiation of the sub-program adding a brine quantity for regenerating the ion exchanger during the sub-program Clean and with II and by means of a filled-in field in the regeneration valve column the alternatively possible arrangement of the sub-program adding a brine quantity for regenerating the ion exchanger is shown at the end of the sub-program cleaning. To ensure that the addition of a brine quantity to regenerate the ion exchanger during the sub-program cleaning does not cause the brine quantity flowing out of the ion exchanger to be mixed with the cleaning liquid during the cleaning process, which is known to lead to a dilution of the cleaning liquid and thus to a deterioration in the cleaning result , the amount of brine is stored in a storage container and discharged at the end of the cleaning sub-program to reduce the back contamination of the ion exchanger bypassing the ion exchanger. In dishwashers that are equipped with a filling container that can be filled with water from the ion exchanger, since after the start of the sub-program cleaning the filling container is empty, it is used as a storage container for the temporary storage of the amount of brine flowing out of the ion exchanger. At the end of the cleaning sub-program, a filling valve arranged at the outlet of the filling container is opened by opening the filling valve or, if the filling container is emptied by a siphon, after the cleaning sub-program, adding a backwash water quantity in the subsequent sub-program in the subsequent sub-program according to the invention for rinsing out the exchanged hardness formers from the regenerated ion exchanger, the temporarily stored amount of brine is discharged.

Der Zeitraum des an das Teilprogramm Reinigen anschließenden Teilprogramms Zu­gabe einer Rückspülwassermenge zum Ausspülen der ausgetauschten Härtebildner aus dem regenerierten Ionenaustauscher ist mit t4 bezeichnet. Der Zeitraum für das Teilprogramm Zwischenspülen ist mit t5 angegeben, der Zeitraum für das Klarspülen mit t6. Der Zeitraum für das Teilprogramm Trocknen ist mit t7 bezeichnet.The period of time of the sub-program following the sub-program cleaning is added by adding a quantity of backwash water for rinsing out the exchanged hardness formers from the regenerated ion exchanger. The time period for the intermediate rinse program is specified with t5, the time period for rinse aid with t6. The period for the drying sub-program is designated t7.

Wie schon erwähnt, ist es üblich, das Rückspülen des Ionenaustauschers im nächsten Teilprogramm ohne Zugabe eines Reinigers fortzusetzen. Dafür ist vorteilhafterweise der Zeitraum des Teilprogrammes Zwischenspülen t5 genutzt. Beim Teilprogramm Zwischenspülen ist der Enthärtungsgrad des verwendeten Wassers noch von unterge­ordneter Bedeutung. Das Teilprogramm Klarspülen wird bei dem erfindungsgemäßen Verfahren anschließend an das Teilprogramm Zwischenspülen, in dem das Rückspülen des Ionenaustauschers vervollständig wurde, also mit dem aus dem regenerierten Io­nenaustauscher auf den niedrigsten Grad enthärteten Wassers betrieben.As already mentioned, it is customary to continue backwashing the ion exchanger in the next sub-program without adding a cleaner. The period of the sub-program intermediate rinsing t5 is advantageously used for this. The degree of softening of the water used is still of minor importance in the intermediate rinse program. In the method according to the invention, the rinse-aid sub-program is carried out after the intermediate rinse sub-program in which the backwashing of the ion exchanger has been completed, that is to say with the water softened from the regenerated ion exchanger to the lowest degree.

Claims (3)

1. Verfahren zum Betrieb einer programmgesteuerten Geschirrspülmaschine, mit einer Enthärtungseinrichtung, bestehend aus einem Ionenaustauscher, einem Salzvorratsbehälter und einem Regenerierwasser-Vorratsbehälter, wobei die Geschirrspülmaschine mit aus den Teilprogrammen - Vorspülen, Reinigen, Zwischenspülen, Klarspülen, Trocknen, Zugabe einer Solemenge zum Regene­rieren des Ionenaustauschers und Zugabe einer Rückspülwassermenge zum Aus­spülen der ausgetauschten Härtebildner aus dem regenerierten Ionenaustau­scher - wählbaren Spülprogrammen betätigbar ist, dadurch gekenn­zeichnet, daß während oder nach dem Teilprogramm Reinigen das Teil­programm Zugabe einer Solemenge zum Regenerieren des Ionenaustauschers eingeblendet wird und anschließend an das um das Teilprogramm Zugabe einer Solemenge zum Regenerieren des Ionenaustauschers ergänzte Teilprogramm Reinigen das Teilprogramm Zugabe einer Rückspülwassermenge zum Ausspülen der ausgetauschten Härtebildner aus dem regenerierten Ionenaustauscher folgt.1. Method for operating a program-controlled dishwasher, with a softening device consisting of an ion exchanger, a salt storage container and a regeneration water storage container, the dishwasher with from the sub-programs - pre-rinsing, cleaning, rinsing, rinsing, drying, adding a brine quantity to regenerate the Ion exchanger and addition of a backwashing water quantity for rinsing out the exchanged hardness formers from the regenerated ion exchanger - selectable rinsing programs can be activated, characterized in that during or after the cleaning sub-program the sub-program adding a brine quantity for regenerating the ion exchanger is faded in and then after adding the sub-program one Brine quantity for regenerating the ion exchanger supplemented sub-program cleaning the sub-program adding a backwashing water quantity to rinse out the exchanged hardness agents from the rain ion exchanger follows. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß beim Einblenden des Teilprogrammes Zugabe einer Solem enge zum Regenerieren des Ionenaustau­schers während des Teilprogramms Reinigen die aus dem Ionenaustauscher ausfließende Solemenge in einem Vorratsbehälter gespeichert wird und am Ende des Teilprogramms Reinigen oder nach dem Teilprogramm Reinigen un­ter Umgehung des Ionenaustauschers abgeleitet wird.2. The method according to claim 1, characterized in that when inserting the sub-program adding a sol close to regenerate the ion exchanger during the sub-program cleaning the flowing out of the ion exchanger brine quantity is stored in a storage container and at the end of the sub-program cleaning or after the sub-program cleaning under Bypassing the ion exchanger is derived. 3. Verfahren nach Anspruch 2, wobei die Geschirrspülmaschine mit einem Behäl­ter, der mit Wasser aus dem Ionenaustauscher füllbar ist, ausgestattet ist, dadurch gekennzeichnet, daß die aus dem Ionenaustauscher ausfließende Sol­menge in dem Einfüllbehälter gespeichert wird.3. The method according to claim 2, wherein the dishwasher is equipped with a container which can be filled with water from the ion exchanger, characterized in that the amount of sol flowing out of the ion exchanger is stored in the filling container.
EP90107765A 1989-06-29 1990-04-24 Method for operating a program-controlled dishwasher Expired - Lifetime EP0405086B1 (en)

Applications Claiming Priority (2)

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DE3921422A DE3921422A1 (en) 1989-06-29 1989-06-29 METHOD FOR OPERATING A PROGRAM-CONTROLLED DISHWASHER
DE3921422 1989-06-29

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EP0405086B1 EP0405086B1 (en) 1993-11-10

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR1001227B (en) * 1992-04-20 1993-06-30 Dimitrios Pachopoulos New-type dishwasher of high aesthetics and liturgicity.
DE4238450A1 (en) * 1992-11-13 1994-05-19 Bosch Siemens Hausgeraete Programme-controlled domestic dishwasher with dual water supply option - has main and auxiliary water storage reservoirs, heater, water softener and heat exchanger feature giving shorter cycle times
FR2755880A1 (en) * 1996-11-15 1998-05-22 Bitron Spa PERFECTED SOFTENER DEVICE
EP1023868A2 (en) * 1999-01-29 2000-08-02 Premark FEG L.L.C. Water softener for dishwasher
EP1080681A2 (en) * 1999-08-25 2001-03-07 Miele &amp; Cie. GmbH &amp; Co. Method for preparing softened water for washing dishes in a program controlled dishwasher
EP1844692A1 (en) 2006-04-12 2007-10-17 Vestel Beyaz Esya Sanayi Ve Ticaret A.S. Salty water removal method for dishwashers
WO2010142564A1 (en) * 2009-06-10 2010-12-16 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher having a water softening unit and corresponding maintenance method

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DE4125414A1 (en) * 1991-07-31 1993-02-04 Bosch Siemens Hausgeraete Program-controlled dishwasher operation - has water softening device to eliminate expulsion of hardening component during washing
DE4131791C1 (en) * 1991-09-24 1993-02-04 Bosch-Siemens Hausgeraete Gmbh, 8000 Muenchen, De Method for operating dishwasher - uses programmable water softening ion exchanger and regenerating water storage container
DE4233936C2 (en) * 1992-10-08 1996-02-01 Bosch Siemens Hausgeraete Process for washing dishes
DE4233934C2 (en) * 1992-10-08 1996-02-29 Bosch Siemens Hausgeraete Device for washing dishes
DE4413432C1 (en) * 1994-04-18 1995-08-31 Bauknecht Hausgeraete Programme-controlled dishwashing machine
DE19907074A1 (en) * 1999-02-19 2000-08-24 Bsh Bosch Siemens Hausgeraete Water-bearing household appliance, in particular household dishwasher
DE19960307A1 (en) * 1999-12-14 2001-06-21 Bsh Bosch Siemens Hausgeraete Method for operating a program-controlled dishwasher

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DE2312126A1 (en) * 1973-03-10 1974-09-12 Bosch Siemens Hausgeraete DISHWASHER WITH A DISH CONTAINER AND ION EXCHANGER FOR SOFTENING FRESH WATER
FR2325348A1 (en) * 1975-09-24 1977-04-22 Zanussi A Spa Industrie IMPROVEMENT OF THE DISHWASHING PROCESS AND DOMESTIC MACHINE IMPLEMENTING THE PROCESS
EP0094357A1 (en) * 1982-05-07 1983-11-16 INDESIT INDUSTRIA ELETTRODOMESTICI ITALIANA S.p.A. Washing machine with a perfected resin regenerating process
DE3316685A1 (en) * 1983-05-06 1984-11-08 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart METHOD FOR RECOVERING EXHAUST HEAT FROM A HOUSEHOLD DISHWASHER, AND SUCH A MACHINE FOR CARRYING OUT THE METHOD
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR1001227B (en) * 1992-04-20 1993-06-30 Dimitrios Pachopoulos New-type dishwasher of high aesthetics and liturgicity.
DE4238450A1 (en) * 1992-11-13 1994-05-19 Bosch Siemens Hausgeraete Programme-controlled domestic dishwasher with dual water supply option - has main and auxiliary water storage reservoirs, heater, water softener and heat exchanger feature giving shorter cycle times
FR2755880A1 (en) * 1996-11-15 1998-05-22 Bitron Spa PERFECTED SOFTENER DEVICE
EP1023868A2 (en) * 1999-01-29 2000-08-02 Premark FEG L.L.C. Water softener for dishwasher
EP1023868A3 (en) * 1999-01-29 2001-07-11 Premark FEG L.L.C. Water softener for dishwasher
EP1080681A2 (en) * 1999-08-25 2001-03-07 Miele &amp; Cie. GmbH &amp; Co. Method for preparing softened water for washing dishes in a program controlled dishwasher
EP1080681A3 (en) * 1999-08-25 2001-07-11 Miele &amp; Cie. GmbH &amp; Co. Method for preparing softened water for washing dishes in a program controlled dishwasher
EP1844692A1 (en) 2006-04-12 2007-10-17 Vestel Beyaz Esya Sanayi Ve Ticaret A.S. Salty water removal method for dishwashers
WO2010142564A1 (en) * 2009-06-10 2010-12-16 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher having a water softening unit and corresponding maintenance method

Also Published As

Publication number Publication date
DE3921422C2 (en) 1991-09-19
ES2045623T3 (en) 1994-01-16
DD295977A5 (en) 1991-11-21
EP0405086B1 (en) 1993-11-10
DE59003411D1 (en) 1993-12-16
DE3921422A1 (en) 1991-01-10

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