EP0461722A1 - Inlet quantity control for dish washers and washing machines - Google Patents

Inlet quantity control for dish washers and washing machines Download PDF

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Publication number
EP0461722A1
EP0461722A1 EP91201433A EP91201433A EP0461722A1 EP 0461722 A1 EP0461722 A1 EP 0461722A1 EP 91201433 A EP91201433 A EP 91201433A EP 91201433 A EP91201433 A EP 91201433A EP 0461722 A1 EP0461722 A1 EP 0461722A1
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EP
European Patent Office
Prior art keywords
container
water
storage vessel
metering valve
control device
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
EP91201433A
Other languages
German (de)
French (fr)
Other versions
EP0461722B1 (en
Inventor
Udo Barthel
Manfred Gumm
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.)
Bauknecht Hausgeraete GmbH
Whirlpool Europe BV
Original Assignee
Bauknecht Hausgeraete GmbH
Whirlpool Europe BV
Whirlpool International BV
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Publication date
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Publication of EP0461722A1 publication Critical patent/EP0461722A1/en
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Publication of EP0461722B1 publication Critical patent/EP0461722B1/en
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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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/087—Water level measuring or regulating devices
    • 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
    • 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
    • A47L15/42—Details
    • A47L15/4285—Water-heater 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
    • A47L15/4291—Recovery arrangements, e.g. for the recovery of energy or water
    • 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
    • A47L15/48—Drying arrangements
    • A47L15/483—Drying arrangements by using condensers
    • 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
    • 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
    • A47L2401/20—Time, e.g. elapsed operating time
    • 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
    • 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
    • A47L2501/02—Water discharge, e.g. opening or closure of discharge valve

Definitions

  • the invention relates to a device for controlling the water supply quantity for a washing machine or dishwasher containing a container and a program control device.
  • Dishwashers and washing machines of the type mentioned initially require certain amounts of water in their functional sequence, the size of which can also vary depending on the type of sequence.
  • measurement and control methods are used that work according to known physical rules.
  • So z. B. detected the rise of a static water column in a vat pressure converted in a wind boiler and used by a pressure switch set to certain pressure values.
  • the pressure switch now indirectly determines the filling quantity by switching an inlet valve on or off. As a result of this indirect route, a relatively inaccurate measurement is created in the chain, which is due to the tolerances of the individual components, assembly tolerances and the inlet pressure range of 0.3 to 10 bar to be managed.
  • the design of a level control also has an effect the reduction of consumption data in such a way that smaller and smaller amounts of water can be managed.
  • a device of the type mentioned in connection with a softening device for a dishwasher has become known.
  • a water collecting container is provided in the upper region of the machine.
  • the drain line there is a softening device, which on the one hand has a salt container and an ion exchange container in series with the salt container, which in turn opens into the container of the machine.
  • the collecting container is provided with a second drain line which opens directly into the container of the machine.
  • the ion exchange container can be connected directly to the fresh water supply line via an extra line.
  • the collecting container is briefly filled with water up to the level of an overflow threshold during each program sequence of the dishwasher in the program section "Regenerate".
  • the water collected by the collecting container flows under the influence of gravity directly into the salt container, from which a quantity of brine corresponding to the receiving volume of the collecting container is simultaneously fed to the ion exchange container in order to regenerate its ion exchange filling.
  • the receiving volume of the collecting container can be changed by a height-adjustable overflow threshold. The brine requirement can thus be adapted to the degree of exhaustion of the ion exchange filling.
  • the invention has for its object to provide a device of the type mentioned, which allows a very precise measurement of the amount of water to be supplied in a simple manner.
  • a storage vessel connected to the water supply line is arranged in the upper machine area, which is connected via a drain line to the container, that the drain line has a metering valve, the opening position of which by a Time element of the program control device can be limited in time, and that the reservoir contains a control device with which its water level can be kept approximately at the same level when the metering valve is open.
  • the size of the orifice and its wall thickness and the back pressure that occurs in the downstream system result in the amount of water passing through per unit of time.
  • the decisive factor for the accuracy of the measurement is therefore primarily the metering valve, the opening orifice of which must be designed as a function of the downstream system. Since the water level in the storage vessel and thus the amount of water present in the storage vessel remains essentially the same as a result of the control device, a different height cannot exert any influence on the amount of water passing through per unit of time. It is thus possible to supply a precisely determined amount of water by opening the metering valve for a time that is matched to this amount of water. This time can be determined by the timer of the program control device can be set. Overall, an extremely precise quantity measurement can thus be carried out. In addition, different feed quantities can be controlled very precisely through variable program-related time setting.
  • the metering valve is provided with an adjustable diaphragm.
  • the amount of water to be supplied per unit of time can thus be changed in a simple manner, so that it can be easily adapted to the system connected behind the metering valve.
  • Two fixed reed switches and a float carried by the water level are preferably provided as the control device for regulating the water level within the storage vessel.
  • This float works with the reed switches in such a way that the inlet valve for the water inlet of the storage vessel is opened or closed as soon as the float exceeds certain limits specified by the reed switches.
  • An advantageous embodiment of the invention is characterized in that a two-way valve and a water softening device with an ion exchange container and a salt container are provided in the drain line behind the metering valve.
  • the two-way valve can either be connected downstream of the metering valve as a separate component or can be integrated with the water softening system.
  • the water is either passed directly through the ion exchanger or, after switching the two-way valve, via the salt container and the ion exchanger into the container. So that can due to the relatively short inflow time, the water can be passed through the salt container and the ion exchanger in a simple manner in order to bring about the regeneration of the ion exchanger.
  • the flat storage vessel is preferably arranged with a broad side on the rear wall of the container or on a side wall. It can thus be achieved that the rinsing container acts as a condenser. If the storage vessel is filled with cold water immediately after the "Rinse aid" program section in a dishwasher, a large temperature difference with the other surfaces of the container forms on the connection surface. The air-water mixture in the interior of the container condenses on this "condensation surface" as it passes by by natural convection.
  • the storage vessel can be provided via an opening with a pipeline which either opens into the container of the machine or into a floor pan arranged below the container. This allows a ventilation, in particular when filling the storage vessel, to be made possible in a simple manner. At the same time, there is overflow protection for every device version in the event of a failure of the feed control.
  • the storage vessel is provided with a heating device. This can be done in a simple manner heating the flowing water, z. B. by means of microwave radiation. It is also possible to install a flow heater due to the low flow rate in the drain line.
  • the metering valve can be followed by a multi-way valve for supplying chambers containing detergents.
  • the cleaner whether in powder, liquid or other form, is pre-dosed and mixed or dissolved with a portion of water from the storage container and thus added to the washing container in a very low-viscosity manner.
  • This pre-liquefaction and the control that is also possible with precise timing prevents loss due to the geometry of the shaft tank, which results in better utilization and higher efficiency.
  • the dishwasher 10 contains a container 11 for receiving the dishes to be washed. On the back of the container 11, a flat storage vessel 12 is arranged with a broad side adjacent.
  • the fresh water is fed to the dishwasher 10 from a fresh water supply 13 via an aqua stop valve 14, a feed line 15 and a so-called free air gap 16.
  • a control device which has two reed switches 18, 19 and a float 20.
  • a metering valve 21 is arranged in a drain line 22 below the storage vessel 12.
  • the metering valve contains an unrecognizable orifice.
  • the opening position of the metering valve 21 can be limited in time by a timer of a program control device 23.
  • With 24 is a two-way valve downstream of the metering valve 21, which is followed by a water softening system with a salt container 25 and an ion exchanger 25.
  • the ion exchanger 26 opens with a line 27 into the container 11 of the dishwasher 10.
  • the device works in such a way that the timer 14 of the program control device 23 first activates the inlet valve 14 for program reasons, so that Storage vessel 12 is filled via the feed line 15 and the free air gap 16.
  • the filling volume of the storage vessel 12 is determined via a level regeneration by means of the float 20 and the reed switches 18, 19.
  • the static height 17 can thus be kept with a small tolerance.
  • the metering valve 21 is controlled by the timer of the program control device 23 and kept open by fixed times.
  • the water flowing through it is led either directly through the ion exchanger 26 via the line 27 or through the salt container 25 and the ion exchanger 26 via the line 27 into the container 11.
  • This function sequence makes it possible to design a time control that is independent of the pre-pressure (line pressure), that is to say the time inflow.
  • this acts as a condenser, at least when the cold water is connected. If the reservoir 12 is filled immediately after the "rinse aid" program section, a large temperature difference to the other container surfaces forms on the connection surface. The air-water mixture in the interior condenses on this condensation surface as it passes by by natural convection.
  • the ventilation of the storage vessel 12 takes place via a pipeline 28 which is connected to the storage vessel 12 and is guided either directly into the container 11 or into a floor pan, not shown, below the container 11.
  • the water in the storage vessel 12 can also be heated by a heating device, not shown.
  • metering valve 21 is controlled in accordance with the then effective program sequence.

Abstract

According to the invention, a simple device for controlling the water inlet quantity in a dish washer or washing machine is proposed, in which there is arranged in the upper machine region a supply vessel (12) which is connected via a flow-off pipe (22) to the container (11) of the machine, in which the flow-off pipe (22) has a dosing valve (21), the opening position of which can be temporally limited by a timing element of the programme control device (23), and in which the supply vessel (12) contains a regulating device, with which the water level (17) in the supply vessel can be kept approximately at the same level with the dosing valve (21) open. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Einrichtung zum Steuern der Wasserzulaufmenge für eine einen Behälter und ein programmsteuergerät enthaltende Wasch- oder Spülmaschine.The invention relates to a device for controlling the water supply quantity for a washing machine or dishwasher containing a container and a program control device.

Spül- und Waschmaschinen der eingangs genannten Art benötigen in ihrem Funktionsablauf zu bestimmten Zeiten bestimmte Wassermengen, deren Größe je nach Ablaufart zusätzlich noch unterschiedlich sein kann. Zur Steuerung dieser unterschiedlichen Wassermengen zu unterschiedlichen Zeiten werden Meß- und Regelmethoden verwendet, die nach bekannten physikalischen Regeln arbeiten. So wird z. B. das Ansteigen einer statischen Wassersäule in einem Bottich druckumgesetzt in einem Windkessel erfaßt und durch einen auf bestimmte Druckwerte eingestellten Druckwächter verwertet. Der Druckwächter bestimmt nun indirekt die Füllmenge durch Ab- bzw. Zuschalten eines Zulaufventils. Bedingt durch diesen indirekten Weg entsteht in der Kette eine relativ ungenaue Messung, die in den Toleranzen der einzelnen Bauteile, Montagetoleranzen sowie in dem zu bewältigenden Zulaufdruckbereich von 0,3 bis 10 bar begründet ist.Dishwashers and washing machines of the type mentioned initially require certain amounts of water in their functional sequence, the size of which can also vary depending on the type of sequence. To control these different amounts of water at different times, measurement and control methods are used that work according to known physical rules. So z. B. detected the rise of a static water column in a vat pressure converted in a wind boiler and used by a pressure switch set to certain pressure values. The pressure switch now indirectly determines the filling quantity by switching an inlet valve on or off. As a result of this indirect route, a relatively inaccurate measurement is created in the chain, which is due to the tolerances of the individual components, assembly tolerances and the inlet pressure range of 0.3 to 10 bar to be managed.

Auf die Auslegung einer Niveauregelung wirkt sich ferner die Reduzierung der Verbrauchsdaten in der Weise aus, daß immer kleinere Wassermengen zu bewältigen sind.The design of a level control also has an effect the reduction of consumption data in such a way that smaller and smaller amounts of water can be managed.

Durch die DE-OS 25 57 054 ist eine Einrichtung der eingangs genannten Art im Zusammenhang mit einer Enthärtungseinrichtung für eine Geschirrspülmaschine bekannt geworden. Bei der bekannten Bauart ist ein im oberen Bereich der Maschine angeordneter Wasserauffangbehälter vorgesehen. Dabei liegt in dessen Abflußleitung eine Enthärtungseinrichtung, die einerseits einen Salzbehälter und einen mit dem Salzbehälter in Reihe liegenden Ionenaustauschbehälter aufweist, der seinerseits in den Behälter der Maschine mündet. Ferner ist der Auffangbehälter mit einer zweiten, direkt in den Behälter der Maschine mündenden Ablaufleitung versehen. Überdies ist der Ionenaustauschbehälter über eine Extraleitung direkt mit der Frischwasserzuleitung verbindbar. Bei dieser bekannten Bauart wird während eines jeden Programmablaufes der Geschirrspülmaschine in dem Programmabschnitt "Regenerieren" der Auffangbehälter bis in Höhe einer Überlaufschwelle kurzzeitig mit Wasser gefüllt. Zusätzlich zugeführtes Wasser fließt durch die zweite Ablaufleitung direkt in den Spülbehälter der Geschirrspülmaschine ab. Das vom Auffangbehälter gesammelte Wasser fließt dagegen unter dem Einfluß der Schwerkraft direkt in den Salzbehälter, von dem gleichzeitig eine dem Aufnahmevolumen des Auffangbehälters entsprechende Menge Sole dem Ionenaustauschbehälter zugeführt wird, um dessen Ionenaustauschfüllung zu regenerieren. Bei dieser bekannten Bauart ist das Aufnahmevolumen des Auffangbehälters durch eine höhenverstellbare Überlaufschwelle veränderbar. Damit kann der Solebedarf an den Erschöpfungsgrad der Ionenaustauschfüllung angepaßt werden.From DE-OS 25 57 054 a device of the type mentioned in connection with a softening device for a dishwasher has become known. In the known design, a water collecting container is provided in the upper region of the machine. In the drain line there is a softening device, which on the one hand has a salt container and an ion exchange container in series with the salt container, which in turn opens into the container of the machine. Furthermore, the collecting container is provided with a second drain line which opens directly into the container of the machine. In addition, the ion exchange container can be connected directly to the fresh water supply line via an extra line. In this known construction, the collecting container is briefly filled with water up to the level of an overflow threshold during each program sequence of the dishwasher in the program section "Regenerate". Additionally supplied water flows through the second drain pipe directly into the dishwasher's rinse tank. The water collected by the collecting container, on the other hand, flows under the influence of gravity directly into the salt container, from which a quantity of brine corresponding to the receiving volume of the collecting container is simultaneously fed to the ion exchange container in order to regenerate its ion exchange filling. In this known design, the receiving volume of the collecting container can be changed by a height-adjustable overflow threshold. The brine requirement can thus be adapted to the degree of exhaustion of the ion exchange filling.

Der Erfindung liegt die Aufgabe zugrunde, eine Einrichtung der eingangs genannten Art zu schaffen, die auf einfache Weise eine sehr genaue Messung der jeweils zuzuführenden Wassermenge ermöglicht.The invention has for its object to provide a device of the type mentioned, which allows a very precise measurement of the amount of water to be supplied in a simple manner.

Diese Aufgabe wird gemäß der Erfindung bei einer Einrichtung der eingangs genannten Art dadurch gelöst, daß im oberen Maschinenbereich ein an die Wasserzuleitung angeschlossenes Vorratsgefäß angeordnet ist, welches über eine Abflußleitung mit dem Behälter verbunden ist, daß die Abflußleitung ein Dosierventil aufweist, dessen Öffnungsstellung durch ein Zeitglied des Programmsteuergerätes zeitlich begrenzt werden kann, und daß das Vorratsgefäß eine Regeleinrichtung enthält, mit der sein Wasserspiegel bei geöffnetem Dosierventil annähernd auf gleicher Höhe gehalten werden kann.This object is achieved according to the invention in a device of the type mentioned in that a storage vessel connected to the water supply line is arranged in the upper machine area, which is connected via a drain line to the container, that the drain line has a metering valve, the opening position of which by a Time element of the program control device can be limited in time, and that the reservoir contains a control device with which its water level can be kept approximately at the same level when the metering valve is open.

Durch die Größe der Blende und deren Wandstärke und durch den bei dem nachgeschalteten System auftretenden Gegendruck ergibt sich die pro Zeiteinheit durchtretende Wassermenge. Maßgebend für die Genauigkeit der Messung ist somit hauptsächlich das Dosierventil, dessen Öffnungsblende in Abhängigkeit des nachgeschalteten Systems ausgelegt werden muß. Da durch die Regeleinrichtung der Wasserspiegel im Vorratsgefäß und damit die in dem Vorratsgefäß vorhandene Wassermenge im wesentlichen gleich bleibt, kann eine unterschiedliche Höhe keinen Einfluß auf die pro Zeiteinheit durchtretende Wassermenge ausüben. Somit ist es möglich, eine genau bestimmte Wassermenge zuzuführen, indem das Dosierventil für eine auf diese Wassermenge abgestimmte Zeit geöffnet wird. Diese Zeit kann durch das Zeitglied des Programmsteuergerätes eingestellt werden. Insgesamt kann somit eine äußerst genaue Mengenmessung erfolgen. Ferner können, durch variabel-programmbedingte Zeiteinstellung, auch unterschiedliche Zulaufmengen sehr genau gesteuert werden.The size of the orifice and its wall thickness and the back pressure that occurs in the downstream system result in the amount of water passing through per unit of time. The decisive factor for the accuracy of the measurement is therefore primarily the metering valve, the opening orifice of which must be designed as a function of the downstream system. Since the water level in the storage vessel and thus the amount of water present in the storage vessel remains essentially the same as a result of the control device, a different height cannot exert any influence on the amount of water passing through per unit of time. It is thus possible to supply a precisely determined amount of water by opening the metering valve for a time that is matched to this amount of water. This time can be determined by the timer of the program control device can be set. Overall, an extremely precise quantity measurement can thus be carried out. In addition, different feed quantities can be controlled very precisely through variable program-related time setting.

In Ausgestaltung der Erfindung ist das Dosierventil mit einer einstellbaren Blende versehen. Damit kann die pro Zeiteinheit zuzuführende Wassermenge auf einfache Weise verändert werden, so daß damit eine einfache Anpassung an das hinter dem Dosierventil angeschlossene System ermöglicht werden kann.In an embodiment of the invention, the metering valve is provided with an adjustable diaphragm. The amount of water to be supplied per unit of time can thus be changed in a simple manner, so that it can be easily adapted to the system connected behind the metering valve.

Als Regeleinrichtung zur Regelung des Wasserspiegels innerhalb des Vorratsgefäßes sind vorzugsweise zwei ortsfeste Reedschalter und ein vom Wasserspiegel getragener Schwimmer vorgesehen. Dieser Schwimmer arbeitet mit den Reedschaltern derart zusammen, daß das Zulaufventil für den Wasserzulauf des Vorratsgefäßes geöffnet oder geschlossen wird, sobald der Schwimmer bestimmte, durch die Reedschalter vorgegebene Grenzen überschreitet.Two fixed reed switches and a float carried by the water level are preferably provided as the control device for regulating the water level within the storage vessel. This float works with the reed switches in such a way that the inlet valve for the water inlet of the storage vessel is opened or closed as soon as the float exceeds certain limits specified by the reed switches.

Eine vorteilhafte Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß in der Abflußleitung hinter dem Dosierventil ein Zweiwegeventil und eine Wasserenthärtungseinrichtung mit einem Ionenaustauschbehälter und einem Salzbehälter vorgesehen sind. Dabei kann das Zweiwegeventil in Ausgestaltung der Erfindung entweder als gesondertes Bauteil dem Dosierventil nachgeschaltet oder mit der Wasserenthärtungsanlage integriert sein. Je nach Stellung des Zweiwegeventiles wird dabei das Wasser entweder direkt durch den Ionenaustauscher oder, nach Umschaltung des Zweiwegeventils, über den Salzbehälter und den Ionenaustauscher in den Behälter geleitet. Damit kann auf einfache Weise programmbedingt durch eine relativ kurze Zulaufzeit das Wasser über den Salzbehälter und den Ionenaustauscher geleitet werden, um das Regenerieren des Ionenaustauschers zu bewerkstelligen.An advantageous embodiment of the invention is characterized in that a two-way valve and a water softening device with an ion exchange container and a salt container are provided in the drain line behind the metering valve. In the embodiment of the invention, the two-way valve can either be connected downstream of the metering valve as a separate component or can be integrated with the water softening system. Depending on the position of the two-way valve, the water is either passed directly through the ion exchanger or, after switching the two-way valve, via the salt container and the ion exchanger into the container. So that can due to the relatively short inflow time, the water can be passed through the salt container and the ion exchanger in a simple manner in order to bring about the regeneration of the ion exchanger.

In zweckmäßiger Ausgestaltung ist das flach ausgebildete Vorratsgefäß vorzugsweise mit einer Breitseite an der Behälterrückwand oder an einer Seitenwand angeordnet. Damit kann erreicht werden, daß der Spülbehälter als Kondensator wirkt. Wird nämlich das Vorratsgefäß unmittelbar nach dem Programmabschnitt "Klarspülen" bei einer Spülmaschine mit kaltem Wasser gefüllt, so bildet sich an der Anbindungsfläche eine starke Temperaturdifferenz zu den übrigen Flächen des Behälters. An dieser "Kondensfläche" kondensiert das im Innenraum des Behälters befindliche Luft-Wassergemisch beim Vorbeistreichen durch natürliche Konvektion.In an expedient embodiment, the flat storage vessel is preferably arranged with a broad side on the rear wall of the container or on a side wall. It can thus be achieved that the rinsing container acts as a condenser. If the storage vessel is filled with cold water immediately after the "Rinse aid" program section in a dishwasher, a large temperature difference with the other surfaces of the container forms on the connection surface. The air-water mixture in the interior of the container condenses on this "condensation surface" as it passes by by natural convection.

In weiterer Ausgestaltung der Erfindung kann das Vorratsgefäß über eine Öffnung mit einer Rohrleitung versehen sein, die entweder in den Behälter der Maschine oder in eine unterhalb des Behälters angeordnete Bodenwanne mündet. Damit kann auf einfache Weise eine insbesondere beim Füllen des Vorratsgefäßes erforderliche Belüftung ermöglicht werden. Gleichzeitig ergibt sich damit ein Überlaufschutz bei jeder Geräteausführung im Falle des Versagens der Zulaufsteuerung.In a further embodiment of the invention, the storage vessel can be provided via an opening with a pipeline which either opens into the container of the machine or into a floor pan arranged below the container. This allows a ventilation, in particular when filling the storage vessel, to be made possible in a simple manner. At the same time, there is overflow protection for every device version in the event of a failure of the feed control.

Durch die letztgenannte Ausführung, bei der die Rohrleitung in den Behälter mündet, ergibt sich ein weiterer Vorteil für die Trocknungsphase bei einer Geschirrspülmaschine. Durch gänzliche Entleeren des Vorratsgefäßes entsteht in diesem ein Unterdruck, der ein Absaugen des Wrasens aus dem Spülbehälters bewirkt. Der Abgesaugte Wrasen kann aufgrund des Temperaturunterschieds zur Außenwand im Vorratsgeefäß kondensieren. Dadurch bedingt wird der Trocknungsgrad des Spülgutes erhöht.The latter embodiment, in which the pipeline opens into the container, results in a further advantage for the drying phase in a dishwasher. By completely emptying the storage vessel, a negative pressure is created in it, which means that the Wrasens from the rinse tank causes. The extracted vapors can condense in the storage vessel due to the temperature difference to the outer wall. This increases the degree of drying of the items to be washed.

In Ausgestaltung der Erfindung ist vorgesehen, daß das Vorratsgefäß mit einer Heizeinrichtung versehen ist. Damit kann auf einfache Weise eine Aufheizung des durchfließenden Wasser erfolgen, und zwar z. B. mittels einer Mikrowellenbestrahlung. Es ist auch möglich, aufgrund der geringen Durchflußgeschwindigkeit in der Ablaufleitung, eine Durchflußheizung zu installieren.In an embodiment of the invention it is provided that the storage vessel is provided with a heating device. This can be done in a simple manner heating the flowing water, z. B. by means of microwave radiation. It is also possible to install a flow heater due to the low flow rate in the drain line.

Schließlich kann in einer weiteren Ausgestaltung der Erfindung dem Dosierventil ein Mehrwegeventil zur Speisung von Detergenzien enthaltenden Kammern nachgeschaltet sein. Dabei wird der Reiniger, ob in Pulverform, in flüssiger oder in sonstiger Form, vordosiert und mit einer Teilmenge von Wasser aus dem Vorratsgefäß gemischt bzw. aufgelöst und somit in recht niedrig-viskoser Art dem Spülbehälter beigegeben. Diese Vorverflüssigung und die damit auch mögliche zeitlich genaue Steuerung verhindert auf jeden Fall einen Verlust, bedingt durch Schachtbehälter-Geometrien, und somit ergibt sich eine bessere Ausnutzung und höhere Effizienz.Finally, in a further embodiment of the invention, the metering valve can be followed by a multi-way valve for supplying chambers containing detergents. The cleaner, whether in powder, liquid or other form, is pre-dosed and mixed or dissolved with a portion of water from the storage container and thus added to the washing container in a very low-viscosity manner. This pre-liquefaction and the control that is also possible with precise timing prevents loss due to the geometry of the shaft tank, which results in better utilization and higher efficiency.

In der Zeichnung ist in den Fig. 1 bis 3 ein Gegenstand gemäß der Erfindung bei einer Geschirrspülmaschine schematisch dargestellt.

  • Fig. 1 zeigt eine Rückansicht der Geschirrspülmaschine mit einer Einrichtung gemäß der Erfindung,
  • Fig. 2 zeigt eine schematische Prinzipskizze der Einrichtung, und
  • Fig. 3 zeigt eine Einrichtung bei einer Geschirrspülmaschine im Zusammenhang mit einer Wasserenthärtungsanlage.
In the drawing, an object according to the invention in a dishwasher is shown schematically in FIGS. 1 to 3.
  • 1 shows a rear view of the dishwasher with a device according to the invention,
  • Fig. 2 shows a schematic diagram of the device, and
  • 3 shows a device in a dishwasher in connection with a water softening system.

Die Geschirrspülmaschine 10 enthält einen Behälter 11 zur Aufnahme des zu spülenden Geschirrs. An der Rückseite des Behälters 11 ist ein flach ausgebildes Vorratsgefäß 12 mit einer Breitseite anliegend angeordnet. Das Frischwasser wird der Geschirrspülmaschine 10 von einer Frischwasserzufuhr 13 über ein Aquastopventil 14, eine Zuleitung 15 und eine sogenannte freie Luftstrecke 16 zugeführt.The dishwasher 10 contains a container 11 for receiving the dishes to be washed. On the back of the container 11, a flat storage vessel 12 is arranged with a broad side adjacent. The fresh water is fed to the dishwasher 10 from a fresh water supply 13 via an aqua stop valve 14, a feed line 15 and a so-called free air gap 16.

Um den Wasserstand in dem Vorratsgefäß 12 möglichst auf konstanter Höhe 17 zu halten, ist eine Regeleinrichtung vorgesehen, die zwei Reedschalter 18, 19 und einen Schwimmer 20 aufweist. Unterhalb des Vorratsgefäßes 12 ist ein Dosierventil 21 in einer Abflußleitung 22 angeordnet. Das Dosierventil enthält eine nicht erkennbare Blende. Die Öffnungsstellung des Dosierventiles 21 kann durch ein Zeitglied eines Programmsteuergerätes 23 zeitlich begrenzt werden. Mit 24 ist ein dem Dosierventil 21 nachgeschaltes Zweiwegeventil bezeichnet, dem eine Wasserenthärtungsanlage mit einem Salzbehälter 25 und einem Ionenaustauscher 25 nachgeordnet ist. Der Ionenaustauscher 26 mündet mit einer Leitung 27 in den Behälter 11 der Geschirrspülmaschine 10.In order to keep the water level in the reservoir 12 as constant as possible 17, a control device is provided which has two reed switches 18, 19 and a float 20. A metering valve 21 is arranged in a drain line 22 below the storage vessel 12. The metering valve contains an unrecognizable orifice. The opening position of the metering valve 21 can be limited in time by a timer of a program control device 23. With 24 is a two-way valve downstream of the metering valve 21, which is followed by a water softening system with a salt container 25 and an ion exchanger 25. The ion exchanger 26 opens with a line 27 into the container 11 of the dishwasher 10.

Die Einrichtung funktioniert derart, daß durch das Zeitglied des Programmsteuergerätes 23 zunächst das Zulaufventil 14 programmbedingt aktiviert wird, so daß das Vorratsgefäß 12 über die Zuleitung 15 und die freie Luftstrecke 16 gefüllt wird. Über eine Niveauregenerierung mittels des Schwimmers 20 und der Reedschalter 18, 19 wird das Füllvolumen des Vorratsgefäßes 12 bestimmt. Die statische Höhe 17 kann dadurch mit geringer Toleranz gehalten werden. Bei Wasserbedarf im Geschirrspüler 10 wird das Dosierventil 21 durch das Zeitglied des Programmsteuergerätes 23 angesteuert und durch festgesetzte Zeiten offengehalten. Je nach Stellung des Zweiwegeventils 24 wird das durchlaufende Wasser entweder direkt durch den Ionenaustauscher 26 über die Leitung 27 oder durch den Salzbehälter 25 und den Ionenaustauscher 26 über die Leitung 27 in den Behälter 11 geführt. Durch diesen Funktionsablauf ist es möglich, eine vom Vordruck (Leitungsdruck) unabhängige Zeitsteuerung, d. h. zeitlichen Zulauf, zu gestalten.The device works in such a way that the timer 14 of the program control device 23 first activates the inlet valve 14 for program reasons, so that Storage vessel 12 is filled via the feed line 15 and the free air gap 16. The filling volume of the storage vessel 12 is determined via a level regeneration by means of the float 20 and the reed switches 18, 19. The static height 17 can thus be kept with a small tolerance. If water is required in the dishwasher 10, the metering valve 21 is controlled by the timer of the program control device 23 and kept open by fixed times. Depending on the position of the two-way valve 24, the water flowing through it is led either directly through the ion exchanger 26 via the line 27 or through the salt container 25 and the ion exchanger 26 via the line 27 into the container 11. This function sequence makes it possible to design a time control that is independent of the pre-pressure (line pressure), that is to say the time inflow.

Durch die in Fig. 1 gezeigte Anbindung des Vorratsgefäßes 12 mit seiner flachen Seite an dem Spülbehälter 11 wirkt dieser, zumindest bei Kaltwasseranschluß, als Kondensator. Wird das Vorratsgefäß 12 unmittelbar nach dem Programmabschnitt "Klarspülen" gefüllt, so bildet sich an der Anbindungsfläche eine starke Temperaturdifferenz zu den übrigen Behälterflächen. An dieser Kondensfläche kondensiert das im Innenraum befindliche Luft-Wassergemisch beim Vorbeistreichen durch natürliche Konvektion.Due to the connection of the storage vessel 12 shown in FIG. 1 with its flat side to the washing container 11, this acts as a condenser, at least when the cold water is connected. If the reservoir 12 is filled immediately after the "rinse aid" program section, a large temperature difference to the other container surfaces forms on the connection surface. The air-water mixture in the interior condenses on this condensation surface as it passes by by natural convection.

Die Belüftung des Vorratsgefäßes 12 erfolgt über eine Rohrleitung 28, die mit dem Vorratsgefäß 12 verbunden ist und entweder direkt in den Behälter 11 oder in eine nicht gezeigte Bodenwanne unterhalb des Behälters 11 geführt ist.The ventilation of the storage vessel 12 takes place via a pipeline 28 which is connected to the storage vessel 12 and is guided either directly into the container 11 or into a floor pan, not shown, below the container 11.

Durch vollständiges Entleeren des Vorratsgefäßes 12 entsteht in diesem ein Unterdruck, der ein Absaugen des Wrasens aus dem Spülbehälter 11 bewirkt. Dies ist vorteilhaft bei der Trocknungsphase der Geschirrspülmaschine. Der abgesaugte Wrasen kann aufgrund des Temperaturunterschiedes zur Außenwand im Vorratsgefäß 12 kondensieren. Dadurch bedingt wird der Trocknungsgrad des Spülgutes erhöht.By completely emptying the storage vessel 12, a negative pressure is created in it, which causes the vapors to be sucked out of the washing container 11. This is advantageous during the drying phase of the dishwasher. The extracted vapors can condense in the storage vessel 12 due to the temperature difference from the outer wall. This increases the degree of drying of the items to be washed.

Wie oben bereits erwähnt, kann das in dem Vorratsgefäß 12 befindliche Wasser auch durch eine nicht dargestellte Heizvorrichtung erwärmt werden.As already mentioned above, the water in the storage vessel 12 can also be heated by a heating device, not shown.

In Fig. 2 ist zusätzlich noch ein Mehrwegeventil 29 eingezeichnet, durch welches je nach Bedarf Dosierkammern 30, die verschiedene Reiniger enthalten, gezielt mit einer dosierten Menge von Wasser aus dem Vorratsgefäß 12 beaufschlagt werden können. Auch dabei wird das Dosierventil 21 entsprechend dem dann wirksamen Programmablauf angesteuert.2 also shows a multi-way valve 29, through which metering chambers 30, which contain different detergents, can be acted upon with a metered amount of water from the storage vessel 12 as required. Here too, the metering valve 21 is controlled in accordance with the then effective program sequence.

Mit 31 ist ein Belüfter für den Behälter 11 der Geschirrspülmaschine 10 bezeichnet.With 31 an aerator for the container 11 of the dishwasher 10 is designated.

Claims (10)

Einrichtung zum Steuerung der Wasserzulaufmenge für eine einen Behälter (11) und ein Programmsteuergerät (23) aufweisende Wasch- oder Spülmaschine, dadurch gekennzeichnet, a) daß im oberen Maschinenbereich ein an die Wasserzuleitung (13 bis 15) angeschlossenes Vorratsgefäß (12) angeordnet ist, welches über eine Abflußleitung (22) mit dem Behälter (11) der Maschine verbunden ist, b) daß die Abflußleitung (22) ein Dosierventil (21) aufweist, dessen Öffnungsstellung durch ein Zeitglied des Programmsteuergerätes (23) zeitlich begrenzt werden kann, und c) daß das Vorratsgefäß (12) eine Regeleinrichtung enthält, mit der sein Wasserspiegel (17) bei geöffnetem Dosierventil (21) annähernd auf gleicher Höhe gehalten werden kann. Device for controlling the water feed quantity for a washing machine or dishwasher having a container (11) and a program control device (23), characterized in that a) that a storage vessel (12) connected to the water supply line (13 to 15) is arranged in the upper machine area and is connected to the container (11) of the machine via a drain line (22), b) that the drain line (22) has a metering valve (21), the opening position of which can be limited in time by a timer of the program control device (23), and c) that the reservoir (12) contains a control device with which its water level (17) can be kept approximately at the same level when the metering valve (21) is open. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Dosierventil (21) mit einer einstellbaren Blende versehen ist.Device according to claim 1, characterized in that the metering valve (21) is provided with an adjustable orifice. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß als Regeleinrichtung zwei ortsfest angeordnete Reedschalter (18, 19) und ein vom Wasserspiegel (17) getragener Schwimmer (20) vorgesehen sind.Device according to claim 1, characterized in that two fixed reed switches (18, 19) and a float (20) carried by the water level (17) are provided as the control device. Einrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß in der Abflußleitung (22) hinter dem Dosierventil (21) ein Zweiwegeventil (24) und eine Wasserenthärtungseinrichtung mit einem Salzbehälter (25) und einem Ionentauscher (26) vorgesehen sind.Device according to one of claims 1 to 3, characterized in that a two-way valve (24) and a water softening device in the drain line (22) behind the metering valve (21) with a salt container (25) and an ion exchanger (26) are provided. Einrichtung nach Anspruch 4, dadurch gekennzeichnet, daß das Zweiwegeventil (24) als besonderes Bauteil dem Dosierventil (21) nachgeschaltet ist.Device according to claim 4, characterized in that the two-way valve (24) is connected as a special component to the metering valve (21). Einrichtung nach Anspruch 4, dadurch gekennzeichnet, daß das Zweiwegeventil (24) in der Wasserenthärtungsanlage (25, 26) integriert ist.Device according to claim 4, characterized in that the two-way valve (24) is integrated in the water softening system (25, 26). Einrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das flach ausgebildete Vorratsgefäß (12) mit einer Breitseite an der Rückwand oder an einer Seitenwand des Behälters (11) anliegt.Device according to one of claims 1 to 6, characterized in that the flat-shaped storage vessel (12) rests with a broad side on the rear wall or on a side wall of the container (11). Einrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das Vorratsgefäß (12) über eine Öffnung mit einer Rohrleitung (28) versehen ist, die entweder in den Behälter (11) oder in eine unterhalb des Behälters (11) angeordnete Bodenwanne mündet.Device according to one of claims 1 to 7, characterized in that the storage vessel (12) is provided via an opening with a pipeline (28) which either opens into the container (11) or into a floor pan arranged below the container (11) . Einrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das Vorratsgefäß (12) mit einer Heizvorrichtung versehen ist.Device according to one of claims 1 to 8, characterized in that the storage vessel (12) is provided with a heating device. Einrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß dem Dosierventil (21) ein Mehrwegeventil (29) zur Speisung von Detergenzien enthaltenden Dosierkammern (30) nachgeschaltet ist.Device according to one of claims 1 to 9, characterized in that the metering valve (21) is followed by a multi-way valve (29) for feeding metering chambers (30) containing detergents.
EP91201433A 1990-06-15 1991-06-11 Inlet quantity control for dish washers and washing machines Expired - Lifetime EP0461722B1 (en)

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DE4019047 1990-06-15
DE4019047A DE4019047A1 (en) 1990-06-15 1990-06-15 INLET QUANTITY CONTROL FOR DISHWASHER AND WASHING EQUIPMENT

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EP0580563A1 (en) * 1992-07-22 1994-01-26 SMEG S.p.A. Safety device for dishwashers, in particular for sensing high water consumption
WO2009027371A1 (en) 2007-08-31 2009-03-05 BSH Bosch und Siemens Hausgeräte GmbH Method for the operation of a water-conducting household appliance
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EP2229866A3 (en) * 2009-03-16 2017-01-04 BSH Hausgeräte GmbH Dishwasher with a freshwater reservoir
EP2292138B1 (en) * 2009-09-03 2016-02-17 BSH Hausgeräte GmbH Dishwasher
US9565987B2 (en) 2010-06-30 2017-02-14 Electrolux Home Products, Inc. System and associated method for preventing overfilling in a dishwasher
US8876980B2 (en) 2010-06-30 2014-11-04 Electrolux Home Products, Inc. System and associated method for preventing overfilling in a dishwasher
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EP2489299A3 (en) * 2011-02-16 2012-11-28 Miele & Cie. KG Water-guiding household device with a storage container
EP2489296A3 (en) * 2011-02-16 2012-11-28 Miele & Cie. KG Method for filling a treatment area of a water-guiding household appliance
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EP2630905A1 (en) * 2012-01-30 2013-08-28 Samsung Electronics Co., Ltd Water softening device and dishwasher having the same
US9861253B2 (en) 2013-09-10 2018-01-09 Samsung Electronics Co., Ltd. Water softening apparatus, dishwasher having the same and control method thereof
EP2845839A1 (en) * 2013-09-10 2015-03-11 Samsung Electronics Co., Ltd Water softening apparatus
EP3162268A1 (en) * 2015-10-26 2017-05-03 BSH Hausgeräte GmbH Water-conducting domestic appliance and method for the operation thereof
US11141039B2 (en) 2017-02-24 2021-10-12 Electrolux Appliances Aktiebolag Dishwasher, method and control system for handling clogging condition
CN113529341A (en) * 2020-04-21 2021-10-22 青岛海尔洗衣机有限公司 Water inflow determination method for washing equipment and washing equipment
CN113529341B (en) * 2020-04-21 2024-01-02 合肥海尔洗衣机有限公司 Method for determining the water intake of a washing device and washing device

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