EP0703311A1 - Method for detecting the supply of water in a washing machine or dishwasher - Google Patents

Method for detecting the supply of water in a washing machine or dishwasher Download PDF

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Publication number
EP0703311A1
EP0703311A1 EP95114853A EP95114853A EP0703311A1 EP 0703311 A1 EP0703311 A1 EP 0703311A1 EP 95114853 A EP95114853 A EP 95114853A EP 95114853 A EP95114853 A EP 95114853A EP 0703311 A1 EP0703311 A1 EP 0703311A1
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EP
European Patent Office
Prior art keywords
water
temperature
washing machine
dishwasher
solenoid valve
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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.)
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EP95114853A
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German (de)
French (fr)
Inventor
Dieter Martin
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Individual
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Individual
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    • 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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/34—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of water filling
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/16—Washing liquid temperature
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/02—Water supply
    • D06F2105/04—Water supply from separate hot and cold water inlets
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/22—Condition of the washing liquid, e.g. turbidity
    • D06F34/24—Liquid temperature
    • 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
    • D06F39/088—Liquid supply arrangements

Definitions

  • the invention relates to a method for determining whether water flows into a program-controlled washing machine or dishwasher, which has a hot water connection and a cold water connection, each having a solenoid valve, and in which an additional device which does not intervene in the control of the washing machine or dishwasher is used, which has a has arranged in the water inlet of the washing machine or dishwasher and is connected to the solenoid valves of the hot water connection and cold water connection.
  • a flow sensor could be installed in the water inlet to determine whether water is entering the washing machine.
  • a sensor is too expensive in practice.
  • the known additional device has a pressure sensor in the water inlet. This registers the pressure changes in the water inlet that occur when opening and closing a solenoid valve that controls the water inlet into the washing machine.
  • a pressure sensor for detecting the Flowing or not flowing water is undesirably expensive and moreover prone to failure.
  • the service life of a pressure sensor is also relatively limited in this application.
  • the reason for the short life of the pressure sensor is, in particular, pressure surges in the water pipe system, which are caused by the rapid closing of water outlets, for example the one-hand mixer for the water inlet into a bathtub.
  • the water flow is relatively high, so that when the actuating lever is suddenly pressed down, a large amount of flow is suddenly stopped, as a result of which a strong pressure surge forms in the entire line system, which also loads the pressure sensor.
  • the invention is based on the problem of developing a method of the type mentioned at the outset by which the flow of water in the water inlet of a washing machine or dishwasher can be determined with as little effort as possible.
  • This problem is solved in accordance with the invention in that a temperature sensor is used as the sensor and the temperature change resulting from the inflow of water is determined in a fixed time unit to determine the flow of water with the additional device.
  • Such a temperature sensor can be obtained far more cost-effectively than a pressure sensor and also works trouble-free in continuous use, since it is not negatively influenced by pressure surges in the water inlet. Since there is often a temperature sensor in the water inlet of washing machines or dishwashers in order to be able to determine the temperature of the water flowing in from the hot water connection, this temperature sensor can be used to carry out the method according to the invention, so that then no changes to the hardware are required to carry out the method according to the invention. All that is required is to program a computer accordingly in the additional device.
  • a component namely the pressure sensor, is omitted and the result is that this does not result in a minor function, but surprisingly results in a lower susceptibility to failure, in addition to cost savings.
  • the method according to the invention could even be used if a washing machine or dishwasher has only one cold water connection. Even then, there would be a drop in temperature in the water inlet when the water flowed because the newly flowing water is usually colder than water that had been in the water inlet for some time and could therefore absorb heat from the environment.
  • the additional device by means of the solenoid valves is used to switch over to the other water inflow state when the temperature changes over time, then the flow of cold water can also be determined under these conditions, because in the case of water flowing into the washing machine or dishwasher Water a short-term opening of the solenoid valve for the hot water would result in a temperature rise at the temperature sensor. If the water inlet were closed on the washing machine or dishwasher side, there would be no water in the water inlet flow, then even when the solenoid valve of the hot water connection was opened, no warm water would reach the temperature sensor and thus no temporal temperature difference would occur.
  • the drawing shows the outline of a washing machine 1, which has a conventional water inlet 2 and a power cord 3 with a power plug 4.
  • a mixer 5 is connected, which has a hot water connection 6 and a cold water connection 7 is connected.
  • Solenoid valves 8, 9 can control the amount of hot and cold water flowing in.
  • water only gets into the washing machine 1 if, in addition to at least one of the solenoid valves 8, 9, a solenoid valve 10 in the water inlet 2 is also open.
  • This solenoid valve 10 is actuated by a control, not shown, of the washing machine 1.
  • This temperature sensor 11 is connected to a control unit 12, which has a mains plug 13 and a plug contact 14.
  • the mains plug 4 of the washing machine 1 can be plugged into this plug contact 14 so that it can be supplied with electrical energy via the control device 12.
  • a computer in the control unit 12 which controls the power supply to the washing machine 1 on the basis of the temperature signals of the temperature sensor 11 and the information about the power consumption of the washing machine 1, which is supplied by a current sensor installed in the control unit 12.
  • control device 12 On the front of the control device 12 there is a selector switch 15, with which one can set the washing process with which the program is to start, in accordance with the setting made on the washing machine 1. Furthermore, the control device 12 has a timer 16 with which the total duration of the interruption of the main washing process can be set. In addition, a temperature switch 17 is provided, which allows the temperature of the water supplied to the washing machine 1 to be adjusted.
  • the temperature in water inlet 2 remains constant or changes only slightly due to the heat given off or absorption of the water inlet to or from the ambient air. If cold water or hot water flows into the water inlet 2 by opening the solenoid valve 10 and one of the solenoid valves 8, 9, then the temperature at the temperature sensor 11 changes very quickly, which serves as an indication of the flow of water in the control unit.
  • the solenoid valve 8 of the cold water connection 7 is opened in order to obtain a steep drop in temperature, and thus a corresponding signal, due to a short-term drop in flowing, cold water only.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Abstract

To register the entry of water into a program controlled clothes or dishes washing machine, a thermal sensor registers water flow with an attachment to determine temp. change through flowing water in a fixed time span.

Description

Die Erfindung betrifft ein Verfahren zum Feststellen, ob in eine programmgesteuerte Wasch- oder Spülmaschine, die einen jeweils ein Magnetventil aufweisenden Warmwasseranschluß und Kaltwasseranschluß hat, Wasser einläuft und bei dem eine nicht in die Steuerung der Wasch- oder Spülmaschine eingreifende Zusatzeinrichtung verwendet wird, welche einen im Wassereinlauf der Wasch- oder Spülmaschine angeordneten Sensor hat und mit den Magnetventilen des Warmwasseranschlusses und Kaltwasseranschlusses in Verbindung steht.The invention relates to a method for determining whether water flows into a program-controlled washing machine or dishwasher, which has a hot water connection and a cold water connection, each having a solenoid valve, and in which an additional device which does not intervene in the control of the washing machine or dishwasher is used, which has a has arranged in the water inlet of the washing machine or dishwasher and is connected to the solenoid valves of the hot water connection and cold water connection.

Ein Verfahren der vorstehenden Art ist in dem DE-U-88 09 548.7 beschrieben. Dieses Gebrauchsmuster hat eine Zusatzeinrichtung zum Gegenstand, die es erlaubt, das Arbeiten einer programmgesteuerten Waschmaschine hinsichtlich ihres Verbrauchs an elektrischer Energie, Wasser und Waschmittel zu optimieren, ohne daß in die vorhandene Steuerung der Waschmaschine eingegriffen werden muß.A method of the above type is described in DE-U-88 09 548.7. This utility model has the subject of an additional device, which makes it possible to optimize the work of a program-controlled washing machine with regard to its consumption of electrical energy, water and detergent, without having to intervene in the existing control of the washing machine.

Zum Feststellen, ob Wasser in die Waschmaschine einläuft, könnte man im Wassereinlauf einen Strömungssensor einbauen. Ein solcher Sensor ist jedoch für die Praxis zu teuer. Um diesen Aufwand zu verringern, hat die bekannte Zusatzeinrichtung im Wassereinlauf einen Drucksensor. Dieser registriert die Druckänderungen im Wassereinlauf, welche beim Öffnen und Schließen eines den Wassereinlauf in die Waschmaschine steuernden Magnetventils auftreten.A flow sensor could be installed in the water inlet to determine whether water is entering the washing machine. However, such a sensor is too expensive in practice. In order to reduce this effort, the known additional device has a pressure sensor in the water inlet. This registers the pressure changes in the water inlet that occur when opening and closing a solenoid valve that controls the water inlet into the washing machine.

Es hat sich jedoch bei der bekannten Zusatzeinrichtung gezeigt, daß auch ein Drucksensor zum Feststellen des Fließens oder Nichtfließens von Wasser unerwünscht teuer und obendrein störanfällig ist. Auch ist die Lebensdauer eines Drucksensors bei diesem Anwendungsfall relativ begrenzt. Ursache für die kurze Lebensdauer des Drucksensors sind insbesondere Druckschläge im Wasserleitungssystem, welche durch rasches Schließen von Wasserauslässen entstehen, beispielsweise des Einhandmischers für den Wassereinlauf in eine Badewanne. Dort ist der Wasserdurchfluß relativ hoch, so daß beim plötzlichen Niederdrücken des Betätigungshebels eine große Strömungsmenge plötzlich abgestoppt wird, wodurch sich im gesamten Leitungssystem ein starker Druckschlag bildet, der auch den Drucksensor belastet.However, it has been shown in the known additional device that a pressure sensor for detecting the Flowing or not flowing water is undesirably expensive and moreover prone to failure. The service life of a pressure sensor is also relatively limited in this application. The reason for the short life of the pressure sensor is, in particular, pressure surges in the water pipe system, which are caused by the rapid closing of water outlets, for example the one-hand mixer for the water inlet into a bathtub. There, the water flow is relatively high, so that when the actuating lever is suddenly pressed down, a large amount of flow is suddenly stopped, as a result of which a strong pressure surge forms in the entire line system, which also loads the pressure sensor.

Der Erfindung liegt das Problem zugrunde, ein Verfahren der eingangs genannten Art zu entwickeln, durch welches mit möglichst geringem Aufwand das Fließen von Wasser im Wassereinlauf einer Wasch- oder Spülmaschine feststellbar ist.The invention is based on the problem of developing a method of the type mentioned at the outset by which the flow of water in the water inlet of a washing machine or dishwasher can be determined with as little effort as possible.

Dieses Problem wird erfindungsgemäß dadurch gelöst, daß als Sensor ein Temperatursensor verwendet und zur Feststellung des Fließens von Wasser mit der Zusatzeinrichtung die durch den Zufluß von Wasser sich ergebende Temperaturänderung in einer festgelegten Zeiteinheit bestimmt wird.This problem is solved in accordance with the invention in that a temperature sensor is used as the sensor and the temperature change resulting from the inflow of water is determined in a fixed time unit to determine the flow of water with the additional device.

Ein solcher Temperatursensor ist weit kostengünstiger zu erhalten als ein Drucksensor und arbeitet auch im Dauereinsatz störungsfrei, da er nicht von Druckschlägen im Wassereinlauf negativ beeinflußt wird. Da im Wassereinlauf von Wasch- oder Spülmaschinen häufig ohnehin ein Temperatursensor vorhanden ist, um die Temperatur des vom Warmwasseranschluß zufließenden Wassers bestimmen zu können, läßt sich zur Durchführung des erfindungsgemäßen Verfahrens dieser Temperatursensor mitbenutzen, so daß dann zur Durchführung des erfindungsgemäßen Verfahrens keinerlei Veränderungen an der Hardware erforderlich werden. Es muß lediglich ein Rechner in der Zusatzeinrichtung entsprechend programmiert werden. Gemäß der Erfindung wird bei der Zusatzeinrichtung nach der DE-U-88 09 548.7 ein Bauteil, nämlich der Drucksensor, weggelassen und erreicht, daß sich dadurch keine Minderfunktion, sondern überraschenderweise sogar zusätzlich zur Kosteneinsparung eine geringere Störanfälligkeit ergibt.Such a temperature sensor can be obtained far more cost-effectively than a pressure sensor and also works trouble-free in continuous use, since it is not negatively influenced by pressure surges in the water inlet. Since there is often a temperature sensor in the water inlet of washing machines or dishwashers in order to be able to determine the temperature of the water flowing in from the hot water connection, this temperature sensor can be used to carry out the method according to the invention, so that then no changes to the hardware are required to carry out the method according to the invention. All that is required is to program a computer accordingly in the additional device. According to the invention, in the additional device according to DE-U-88 09 548.7, a component, namely the pressure sensor, is omitted and the result is that this does not result in a minor function, but surprisingly results in a lower susceptibility to failure, in addition to cost savings.

Das erfindungsgemäße Verfahren könnte sogar dann angewandt werden, wenn eine Wasch- oder Spülmaschine nur einen Kaltwasseranschluß aufweist. Auch dann käme es beim Fließen von Wasser zu einem Temperaturabfall im Wassereinlauf, weil das neu zufließende Wasser in aller Regel kälter ist als Wasser, welches schon einige Zeit im Wassereinlauf stand und deshalb Wärme aus der Umgebung aufnehmen konnte.The method according to the invention could even be used if a washing machine or dishwasher has only one cold water connection. Even then, there would be a drop in temperature in the water inlet when the water flowed because the newly flowing water is usually colder than water that had been in the water inlet for some time and could therefore absorb heat from the environment.

Wenn zulaufendes Kaltwasser genau die Temperatur hat, welche im Raum herrscht, dann ändert sich die Temperatur am Wassereinlauf nicht, wenn Kaltwasser zur Waschmaschine oder Spülmaschine zu fließen beginnt. Deshalb würde mit dem Temperatursensor in einem solchen Falle das Zulaufen von Kaltwasser nicht feststellbar sein. Wenn jedoch gemäß einer besonders vorteilhaften Weiterbildung des erfindungsgemäßen Verfahrens bei geringen zeitlichen Temperaturänderungen durch die Zusatzeinrichtung mittels der Magnetventile auf den jeweils anderen Wasserzuflußzustand umgeschaltet wird, dann läßt sich auch das Fließen von Kaltwasser unter diesen Bedingungen feststellen, weil bei in die Wasch- oder Spülmaschine fließendem Wasser ein kurzfristiges Öffnen des Magnetventils für das Warmwasser es am Temperatursensor zu einem Temperaturanstieg kommen würde. Wäre der Wassereinlauf wasch- oder spülmaschinenseitig geschlossen, würde also im Wassereinlauf kein Wasser fließen, dann würde auch bei einem Öffnen des Magnetventils des Warmwasseranschlusses kein warmes Wasser zu dem Temperatursensor gelangen und somit keine zeitliche Temperaturdifferenz auftreten.If the incoming cold water has exactly the temperature that prevails in the room, then the temperature at the water inlet does not change when cold water begins to flow to the washing machine or dishwasher. In such a case, the supply of cold water would therefore not be detectable with the temperature sensor. However, if, according to a particularly advantageous development of the method according to the invention, the additional device by means of the solenoid valves is used to switch over to the other water inflow state when the temperature changes over time, then the flow of cold water can also be determined under these conditions, because in the case of water flowing into the washing machine or dishwasher Water a short-term opening of the solenoid valve for the hot water would result in a temperature rise at the temperature sensor. If the water inlet were closed on the washing machine or dishwasher side, there would be no water in the water inlet flow, then even when the solenoid valve of the hot water connection was opened, no warm water would reach the temperature sensor and thus no temporal temperature difference would occur.

Befindet sich im Wassereinlauf stehendes, kaltes Wasser, dann würde sich ein Öffnen des Kaltwasseranschlusses und des den Zufluß in die Waschmaschine steuernden Magnetventils zunächst nicht bemerkbar machen, da es zu keiner Temperaturänderung käme. Aus dem gleichen Grunde würde das Einlaufen von Wasser unbemerkt bleiben, wenn sich zunächst heißes Wasser im Wassereinlauf befindet und das Magnetventil des Warmwasseranschlusses und das den Zufluß in die Waschmaschine steuernde Magnetventil öffnen würde. Diese Fehlfunktionen lassen sich auf einfache Weise ausschließen, wenn bei geringen zeitlichen Temperaturänderungen und Unterschreiten einer Temperaturschwelle kurzfristig und wiederholt auf das Magnetventil des Warmwasseranschlusses und bei Überschreiten der Temperaturschwelle kurzfristig und wiederholt auf das Magnetventil des Kaltwasseranschlusses umgeschaltet wird.If there is cold water in the water inlet, then opening the cold water connection and the solenoid valve controlling the inflow into the washing machine would initially not be noticeable, since there would be no temperature change. For the same reason, the inflow of water would go unnoticed if there was initially hot water in the water inlet and the solenoid valve of the hot water connection and the solenoid valve controlling the inflow into the washing machine would open. These malfunctions can be easily ruled out if the temperature change and the temperature falls below a short time, repeatedly and repeatedly to the solenoid valve of the hot water connection and if the temperature threshold is exceeded, the solenoid valve of the cold water connection is repeatedly and repeatedly switched over.

In der Praxis hat es sich als vorteilhaft erwiesen, wenn die kurzzeitige Umschaltung auf den jeweils anderen Wasserzuflußzustand bei Temperaturänderungen von unter 2°K/sec erfolgt.In practice, it has proven to be advantageous if the brief switchover to the other water inflow state takes place when the temperature changes are below 2 ° K / sec.

Zur weiteren Verdeutlichung des erfindungsgemäßen Verfahrens ist in der Zeichnung schematisch eine Waschmaschine mit Wasser- und Stromversorgung dargestellt und wird nachfolgend beschrieben.To further clarify the method according to the invention, a washing machine with water and power supply is shown schematically in the drawing and is described below.

Die Zeichnung zeigt die Umrisse einer Waschmaschine 1, welche einen üblichen Wassereinlauf 2 und ein Netzkabel 3 mit einem Netzstecker 4 hat. Am Wassereinlauf 2 ist ein Mischer 5 angeschlossen, der mit einem Warmwasseranschluß 6 und einem Kaltwasseranschluß 7 verbunden ist. Magnetventile 8, 9 vermögen die Menge des einfließenden kalten und warmen Wassers zu steuern. Wasser gelangt allerdings nur in die Waschmaschine 1, wenn zusätzlich zu zumindest einem der Magnetventile 8, 9 auch ein Magnetventil 10 im Wassereinlauf 2 geöffnet ist. Dieses Magnetventil 10 wird von einer nicht gezeigten Steuerung der Waschmaschine 1 betätigt.The drawing shows the outline of a washing machine 1, which has a conventional water inlet 2 and a power cord 3 with a power plug 4. At the water inlet 2, a mixer 5 is connected, which has a hot water connection 6 and a cold water connection 7 is connected. Solenoid valves 8, 9 can control the amount of hot and cold water flowing in. However, water only gets into the washing machine 1 if, in addition to at least one of the solenoid valves 8, 9, a solenoid valve 10 in the water inlet 2 is also open. This solenoid valve 10 is actuated by a control, not shown, of the washing machine 1.

Wichtig für die Erfindung ist ein Temperatursensor 11, welcher im Wassereinlauf 2 angeordnet ist. Dieser Temperatursensor 11 ist mit einem Steuergerät 12 verbunden, welches einen Netzstecker 13 und einen Steckkontakt 14 hat. In diesen Steckkontakt 14 kann der Netzstecker 4 der Waschmaschine 1 gesteckt werden, damit diese über das Steuergerät 12 mit elektrischer Energie versorgt werden kann. Nicht dargestellt ist ein Rechner in dem Steuergerät 12, welcher aufgrund der Temperatursignale des Temperatursensors 11 und der Information über die Leistungsaufnahme der Waschmaschine 1, die ein im Steuergerät 12 eingebauter Stromsensor liefert, die Stromzufuhr zur Waschmaschine 1 steuert.A temperature sensor 11, which is arranged in the water inlet 2, is important for the invention. This temperature sensor 11 is connected to a control unit 12, which has a mains plug 13 and a plug contact 14. The mains plug 4 of the washing machine 1 can be plugged into this plug contact 14 so that it can be supplied with electrical energy via the control device 12. Not shown is a computer in the control unit 12, which controls the power supply to the washing machine 1 on the basis of the temperature signals of the temperature sensor 11 and the information about the power consumption of the washing machine 1, which is supplied by a current sensor installed in the control unit 12.

Auf der Vorderseite des Steuergerätes 12 ist ein Wahlschalter 15 vorgesehen, mit dem man entsprechend der an der Waschmaschine 1 vorgenommenen Einstellung einstellen kann, mit welchem Waschvorgang das Programm starten soll. Weiterhin hat das Steuergerät 12 einen Zeitschalter 16, mit dem die Gesamtdauer der Unterbrechung des Hauptwaschvorganges eingestellt werden kann. Zusätzlich ist ein Temperaturschalter 17 vorgesehen, der eine Einstellung der Temperatur des der Waschmaschine 1 zugeführten Wassers erlaubt.On the front of the control device 12 there is a selector switch 15, with which one can set the washing process with which the program is to start, in accordance with the setting made on the washing machine 1. Furthermore, the control device 12 has a timer 16 with which the total duration of the interruption of the main washing process can be set. In addition, a temperature switch 17 is provided, which allows the temperature of the water supplied to the washing machine 1 to be adjusted.

Wenn im Wassereinlauf 2 kein Wasser fließt, dann bleibt die Temperatur im Wassereinlauf 2 konstant oder ändert sich nur geringfügig durch die Wärmeabgabe oder Aufnahme des Wassereinlaufs zur Umgebungsluft oder von ihr. Fließt durch das Öffnen des Magnetventils 10 und eines der Magnetventile 8, 9 Kaltwasser oder Warmwasser im Wassereinlauf 2, dann ändert sich die Temperatur am Temperatursensor 11 sehr rasch, was in dem Steuergerät als Indiz für das Fließen von Wasser dient.If no water flows in water inlet 2, then the temperature in water inlet 2 remains constant or changes only slightly due to the heat given off or absorption of the water inlet to or from the ambient air. If cold water or hot water flows into the water inlet 2 by opening the solenoid valve 10 and one of the solenoid valves 8, 9, then the temperature at the temperature sensor 11 changes very quickly, which serves as an indication of the flow of water in the control unit.

In ungünstigen Fällen kann es vorkommen, daß das vom Kaltwasseranschluß 7 kommende Kaltwasser genau die gleiche Temperatur hat, wie das zuvor im Wassereinlauf 2 stehende Wasser. Am Temperatursensor 11 würde sich dann nichts ändern, so daß das Fließen von Wasser nicht feststellbar wäre. Um das zu verhindern, ist in dem Steuergerät 12 vorgesehen, daß dieses bei niedrigen Temperaturen am Temperatursensor 11 das Magnetventil 9 des Wasseranschlusses 6 öffnet. Solange im Wassereinlauf 2 kein Wasser fließt, führt dieses Öffnen nicht zu einer Temperaturerhöhung im Wassereinlauf 2. Fließt jedoch warmes Wasser durch den Wassereinlauf 2 in die Waschmaschine 1, dann führt ein solches kurzfristiges Öffnen zu einem steilen Temperaturanstieg und damit zu einem Signal, welches auf das Fließen von Wasser hinweist.In unfavorable cases it can happen that the cold water coming from the cold water connection 7 has exactly the same temperature as the water previously standing in the water inlet 2. Nothing would then change at the temperature sensor 11, so that the flow of water would not be detectable. To prevent this, it is provided in the control unit 12 that this opens the solenoid valve 9 of the water connection 6 at low temperatures at the temperature sensor 11. As long as no water flows in the water inlet 2, this opening does not lead to a temperature increase in the water inlet 2. However, if warm water flows through the water inlet 2 into the washing machine 1, such a short-term opening leads to a steep rise in temperature and thus to a signal which occurs the flow of water indicates.

Steht im Wassereinlauf 2 Wasser hoher Temperatur, dann wird das Magnetventil 8 des Kaltwasseranschlusses 7 geöffnet, um durch einen ausschließlich bei fließendem, kalten Wasser kurzfristigen, steilen Temperaturabfall und damit ein entsprechendes Signal zu erhalten.If there is water of high temperature in the water inlet 2, then the solenoid valve 8 of the cold water connection 7 is opened in order to obtain a steep drop in temperature, and thus a corresponding signal, due to a short-term drop in flowing, cold water only.

BezugszeichenlisteReference list

11
WaschmaschineWashing machine
22nd
WassereinlaufWater inlet
33rd
NetzkabelPower cord
44th
NetzsteckerPower plug
55
Mischermixer
66
WarmwasseranschlußHot water connection
77
KaltwasseranschlußCold water connection
88th
Magnetventilmagnetic valve
99
Magnetventilmagnetic valve
1010th
Magnetventilmagnetic valve
1111
TemperatursensorTemperature sensor
1212th
SteuergerätControl unit
1313
NetzsteckerPower plug
1414
SteckkontaktPlug contact
1515
WahlschalterSelector switch
1616
ZeitschalterTimer
1717th
TemperaturschalterTemperature switch

Claims (4)

Verfahren zum Feststellen, ob in eine programmgesteuerte Wasch- oder Spülmaschine, die einen jeweils ein Magnetventil aufweisenden Warmwasseranschluß und Kaltwasseranschluß hat, Wasser einläuft und bei dem eine nicht in die Steuerung der Wasch- oder Spülmaschine eingreifende Zusatzeinrichtung verwendet wird, welche einen im Wassereinlauf der Wasch- oder Spülmaschine angeordneten Sensor hat und mit den Magnetventilen des Warmwasseranschlusses und Kaltwasseranschlusses in Verbindung steht, dadurch gekennzeichnet, daß als Sensor ein Temperatursensor verwendet und zur Feststellung des Fließens von Wasser mit der Zusatzeinrichtung die durch den Zufluß von Wasser sich ergebende Temperaturänderung in einer festgelegten Zeiteinheit bestimmt wird.Method for determining whether water flows into a program-controlled washing machine or dishwasher, which has a hot water connection and a cold water connection, each having a solenoid valve, and in which an additional device which does not interfere with the control of the washing machine or dishwasher is used, which has a device in the water inlet of the washing machine - Or dishwasher arranged sensor and is connected to the solenoid valves of the hot water connection and cold water connection, characterized in that a temperature sensor is used as the sensor and to determine the flow of water with the additional device, the temperature change resulting from the inflow of water in a fixed time unit is determined. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß bei geringen zeitlichen Temperaturänderungen durch die Zusatzeinrichtung mittels der Magnetventile auf den jeweils anderen Wasserzuflußzustand umgeschaltet wird.A method according to claim 1, characterized in that in the event of small changes in temperature over time, the additional device by means of the solenoid valves switches over to the other water inflow state. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß bei geringen zeitlichen Temperaturänderungen und Unterschreiten einer Temperaturschwelle kurzfristig und wiederholt auf das Magnetventil des Warmwasseranschlusses und bei Überschreiten der Temperaturschwelle kurzfristig und wiederholt auf das Magnetventil des Kaltwasseranschlusses umgeschaltet wird.A method according to claim 2, characterized in that when there are small changes in temperature over time and a temperature threshold is undershot, the solenoid valve of the hot water connection is briefly and repeatedly and briefly and repeatedly when the temperature threshold is exceeded, the solenoid valve of the cold water connection is repeatedly and repeatedly switched over. Verfahren nach den Ansprüchen 2 oder 3, dadurch gekennzeichnet, daß die kurzzeitige Umschaltung auf den jeweils anderen Wasserzuflußzustand bei Temperaturänderungen von unter 2°K/sec erfolgt.Process according to claims 2 or 3, characterized in that the brief switchover to the other water inflow state takes place when the temperature changes is less than 2 ° K / sec.
EP95114853A 1994-09-22 1995-09-21 Method for detecting the supply of water in a washing machine or dishwasher Withdrawn EP0703311A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4433747 1994-09-22
DE4433747A DE4433747A1 (en) 1994-09-22 1994-09-22 Method for determining the running of water into a washing machine or dishwasher

Publications (1)

Publication Number Publication Date
EP0703311A1 true EP0703311A1 (en) 1996-03-27

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EP95114853A Withdrawn EP0703311A1 (en) 1994-09-22 1995-09-21 Method for detecting the supply of water in a washing machine or dishwasher

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DE (1) DE4433747A1 (en)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
WO2004106617A1 (en) * 2003-05-28 2004-12-09 Electrolux Home Products Corporation N.V. Clothes washing machine with an integrated arrangement of electromagnetic valves
EP2301407A3 (en) * 2009-09-02 2017-01-18 BSH Hausgeräte GmbH Dishwasher and controlling method thereof
EP4134477A1 (en) * 2021-08-09 2023-02-15 Miele & Cie. KG Method and control device for determining an amount of water and cleaning device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19640934A1 (en) * 1996-10-04 1998-04-09 Jan Kuchta Procedure for economical by-pass of energy, material and water in hot and cold water systems
DE10014871A1 (en) * 2000-03-24 2001-10-11 Miele & Cie Residual water sensing method for use in programmable dishwasher or washing machine uses temperature indicating sensor immersed in water in container
DE10222406A1 (en) * 2002-05-21 2003-12-11 Bsh Bosch Siemens Hausgeraete Water-bearing household appliance, especially a washing machine

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DE2941337A1 (en) * 1979-10-12 1981-04-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Monitor for feed water pipe of dish washer and washing machines - has two electromagnetic valves in line controlled by sensors which detect loose or burst pipes and/or water level
EP0045838A1 (en) * 1980-08-13 1982-02-17 Bosch-Siemens HausgerÀ¤te GmbH Method of varying the hand-controlled programme-cycle of an automatic washing machine, and machine for carrying out the method
US4528709A (en) * 1983-12-07 1985-07-16 Whirlpool Corporation Automatic temperature control for automatic washers
FR2558713A1 (en) * 1984-01-31 1985-08-02 Bosch Siemens Hausgeraete Monitoring program running of dishwasher
DE8809548U1 (en) * 1988-07-27 1988-09-22 Martin, Dieter, 8788 Bad Brückenau Additional equipment for washing machines
EP0355450A2 (en) * 1988-08-25 1990-02-28 AEG Hausgeräte GmbH Device for controlling the supply of warm and cold water to washing machines
DE4338140A1 (en) * 1993-11-09 1995-05-11 David Long Supply and regulating system for washing machines and dishwashers

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2941337A1 (en) * 1979-10-12 1981-04-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Monitor for feed water pipe of dish washer and washing machines - has two electromagnetic valves in line controlled by sensors which detect loose or burst pipes and/or water level
EP0045838A1 (en) * 1980-08-13 1982-02-17 Bosch-Siemens HausgerÀ¤te GmbH Method of varying the hand-controlled programme-cycle of an automatic washing machine, and machine for carrying out the method
US4528709A (en) * 1983-12-07 1985-07-16 Whirlpool Corporation Automatic temperature control for automatic washers
FR2558713A1 (en) * 1984-01-31 1985-08-02 Bosch Siemens Hausgeraete Monitoring program running of dishwasher
DE8809548U1 (en) * 1988-07-27 1988-09-22 Martin, Dieter, 8788 Bad Brückenau Additional equipment for washing machines
EP0355450A2 (en) * 1988-08-25 1990-02-28 AEG Hausgeräte GmbH Device for controlling the supply of warm and cold water to washing machines
DE4338140A1 (en) * 1993-11-09 1995-05-11 David Long Supply and regulating system for washing machines and dishwashers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004106617A1 (en) * 2003-05-28 2004-12-09 Electrolux Home Products Corporation N.V. Clothes washing machine with an integrated arrangement of electromagnetic valves
US7650765B2 (en) 2003-05-28 2010-01-26 Electrolux Home Products Corporation N.V. Clothes washing machine with an integrated arrangement of electromagnetic valves
EP2301407A3 (en) * 2009-09-02 2017-01-18 BSH Hausgeräte GmbH Dishwasher and controlling method thereof
EP4134477A1 (en) * 2021-08-09 2023-02-15 Miele & Cie. KG Method and control device for determining an amount of water and cleaning device

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