WO2006081878A1 - Water guiding domestic appliance - Google Patents

Water guiding domestic appliance Download PDF

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Publication number
WO2006081878A1
WO2006081878A1 PCT/EP2005/055452 EP2005055452W WO2006081878A1 WO 2006081878 A1 WO2006081878 A1 WO 2006081878A1 EP 2005055452 W EP2005055452 W EP 2005055452W WO 2006081878 A1 WO2006081878 A1 WO 2006081878A1
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WO
WIPO (PCT)
Prior art keywords
hardness
degree
water
domestic appliance
designed
Prior art date
Application number
PCT/EP2005/055452
Other languages
German (de)
French (fr)
Inventor
Michael Rosenbauer
Original Assignee
BSH Bosch und Siemens Hausgeräte GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeräte GmbH filed Critical BSH Bosch und Siemens Hausgeräte GmbH
Priority to CN2005800476500A priority Critical patent/CN101111636B/en
Priority to EP05850413A priority patent/EP1846608A1/en
Publication of WO2006081878A1 publication Critical patent/WO2006081878A1/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
    • A47L15/4229—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
    • A47L15/4293—Arrangements for programme selection, e.g. control panels; Indication of the selected programme, programme progress or other parameters of the programme, e.g. by using display panels
    • 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
    • A47L2401/11—Water hardness, acidity or basicity
    • 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
    • A47L2401/30—Variation of electrical, magnetical or optical quantities
    • 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
    • A47L2501/26—Indication or alarm to the controlling device or to the user

Definitions

  • the invention relates to a water-conducting household appliance with a device for detecting a degree of hardness in a liquid and a controlled by a control and / or electronic control signal device for outputting information about the degree of hardness.
  • German patent application DE 19721976 A1 discloses a method for determining an inadmissibly high degree of calcification of an optical measuring section for measuring the turbidity of a liquor in a domestic appliance operated with kalk Vietnamese water.
  • the household appliance has control and regulating electronics which evaluate the measuring signals of the measuring path and emit a control signal which activates a display element arranged on the household appliance.
  • the display device activated as a function of the degree of calcification, the user of the device is thus signaled that the degree of calcification of the device has reached a value that unfavorably influences the work results of the device or its components and / or its service life.
  • the user is on the one hand pointed to the imminent damage caused by calcification of the device.
  • such a display can be used on a targeted use of descaling agents and thereby avoiding their unnecessary use.
  • a disadvantage of this solution is that the measured value detected by the turbidity sensor measures an impermissibly high degree of hardness, in which calcification has already taken place in the household appliance.
  • the user is not informed prior to the onset of calcification in the household appliance in order to take early countermeasures that do not lead to damage in the household appliance.
  • the invention is therefore based on the object in water-bearing household appliances of the type mentioned to inform the user already about the degree of hardness, threaten the damage caused by calcification in water-bearing appliance, but no damage in water-bearing appliance have occurred.
  • This object is achieved in that the signal device is used to output information of an impermissible degree of hardness lying above or below a limit value.
  • the user is able to take countermeasures to prevent impending damage to the water-bearing household appliance.
  • the user can meter descaling agents into the water-bearing household appliance or, on the other hand, an external, water-bearing household appliance
  • the signal device is designed as a display device.
  • This solution offers the advantage that the information of the impermissible degree of hardness lying above or below the limit value is visualized by means of the display device Visual. By visualizing the user recognizes that he must take countermeasures to reduce the degree of hardness in order to extend the life of the water-bearing household appliance.
  • the display device comprises a display and / or an LED.
  • the main advantage is that the manufacturing cost of the display and the LED are very inexpensive to perform. Furthermore, written messages are immediately recognizable on the display.
  • the signal device is designed as an acoustic signal device.
  • the main advantage is that the user obtains information about the impermissible degree of hardness lying above or below the limit value if he does not stay in the vicinity of the water-bearing household appliance. This is ensures that the user can initiate countermeasures when sounding a signal to extend the life of the water-bearing household appliance.
  • the acoustic signal device is designed as a loudspeaker.
  • the signal device is arranged on a door of the water-conducting household appliance.
  • the water-conducting household appliance thus has the advantage that the signal device is always arranged in the field of vision of the user.
  • the acoustic signaling device it is ensured that the sound waves can propagate well in the room and the user always receives information about the impermissible degree of hardness lying above or below a limit value.
  • the user is also able to read information about the impermissible degree of hardness lying above or below a limit value, since the signal device at the door is always within the field of vision of the user.
  • the device for detecting the degree of hardness is designed as an optical sensor.
  • This solution is characterized in particular by the fact that the optical sensor is very inexpensive to manufacture and the measured values are more accurately detected for determination, since the transmitter is less susceptible to disturbances caused by the liquid flowing around.
  • the device for detecting the degree of hardness is designed as a conductivity sensor.
  • Figure 1 is a schematically illustrated dishwasher according to a first embodiment, with a pivotally mounted about a horizontal axis door on the outside of an acoustic signaling device is arranged, and
  • Figure 2 shows a schematically illustrated dishwasher according to a second embodiment, with a pivotally mounted about a horizontal axis door, on the outside of a display device is arranged.
  • FIGS. 1 and 2 show two essentially similar dishwashers 1, V according to the invention with a housing 2, 2 '.
  • a not shown treatment room is accessible via door 3, 3 1 , which is pivotally mounted on a horizontal axis.
  • the door 3, 3 1 has an inner door, not shown, and an outer door 4, 4 ', on which an aperture 5, 5' is arranged.
  • On the panel 5, 5 'controls 6, 6' are arranged, via which one can select a program with the individual program steps pre-rinsing, cleaning, intermediate rinsing, rinsing, drying.
  • the outer door 4, 4 1 has to open and close a at the aperture 5, 5 'arranged actuating handle 7, 7'.
  • a signal device 8, 8 1 for outputting information of an impermissible degree of hardness above or below a limit value is arranged on the diaphragm 5, 5 '.
  • the signaling device 8 is formed as an acoustic signaling device.
  • the acoustic signal device is formed in the illustrated embodiment as a speaker that outputs an acoustic signal at the impermissible above or below the threshold level of hardness.
  • the signaling device 8 ' is designed as a display device. A lettering is visualized on the display device 8 'at the impermissible degree of hardness lying above or below the limit value.
  • the signaling device 8 'could also be formed as an LED, the indicative of impermissibility above or below the threshold by indicating a color.
  • the signaling device 8, 8 ' is connected to a not shown control and regulation electronics, which receives a measurement signal from a device, not shown, for detecting a degree of hardness of a liquid.
  • the device for detecting a degree of hardness in a liquid is designed as an optical sensor.
  • the device for detecting a degree of hardness can be designed as a conductivity sensor.
  • the optical sensor measures the degree of hardness of a liquid, which consists of water or detergent-added water, which is the
  • Dishwasher 1 V is supplied.
  • the optical sensor In order to detect the degree of hardness, the optical sensor has a glass body, on which small lime particles, which lie at least in the microscopic range of hardness, settle.
  • a transmitter of the optical sensor In order to detect the degree of hardness, the optical sensor has a glass body, on which small lime particles, which lie at least in the microscopic range of hardness, settle.
  • Sensor sends light waves in the same frequencies through the glass body to a receiver also associated with the optical sensor.
  • the receiver measures the incoming light intensity and passes the measurement signal to the control and
  • the dishwasher or the goods to be washed can be damaged and lime particles are present in the liquid.
  • the lime particles settle on the glass body of the optical sensor during operation of the dishwasher, so that the receiver does not receive the maximum light intensity transmitted by the transmitter, but only a reduced proportion of the light intensity transmitted by the transmitter.
  • microscopic lime particles are present in the impermissible degree of hardness, they have no influence on the life of the dishwasher. Therefore, damage in the dishwasher and the goods to be washed are excluded.
  • the limit value in the impermissible range of the degree of hardness is defined by the fact that first deposits of microscopically small lime particles form on the glass body of the optical sensor. The receiver of the optical sensor in this case does not receive the maximum light intensity transmitted by the transmitter.
  • the receiver receives a lower light intensity and the signaling device is activated via the control and regulating electronics, so that the user can initiate measures for decalcifying the liquid.
  • Receiver received light intensity is equivalent to a factory determined number of lime particles arranged on the glass body. Is the number of lime particles in the
  • the impermissible degree of hardness is below the limit in the impermissible range.
  • the receiver sends a measuring signal to the control electronics.
  • the control electronics then controls the signaling device, so that the user is informed of the increased degree of hardness.
  • the information can be delivered via the display or alternatively via the LED, as shown in FIG. 1, or via the speaker, as shown in Figure 2, which generates an acoustic signal.
  • the user is informed that he must take measures to lower the degree of hardness of the liquid.
  • he can set an external water softening system associated with the dishwasher 1, 1 '.
  • it can supply descaling agent to the dishwasher 1, 1 ', so that the degree of hardness is lowered.
  • both measures can be dispensed with a water softener in the dishwasher.
  • the signaling device 8, 8 ' is deactivated by the control and regulating electronics, since the degree of hardness detected by the optical sensor is within the permissible range and thus can not be damaged by calcium deposits. Due to the decalcifying measures introduced, decanted liquid now flows around the glass body of the optical sensor, so that the microscopic lime particles arranged on the glass body are swept away and the glass body is free of lime particles.

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  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

The invention relates to a water guiding domestic appliance (1,1') with an optical sensor arranged therein. Said sensor measures the degree of hardness in a liquid. If the degree of hardness is unacceptable, i.e. above or below a threshold value, information on the degree of hardness is emitted by means of a signal device (8,8').

Description

Wasserführendes Haushaltgerät Water-conducting household appliance
Die Erfindung betrifft ein wasserführendes Haushaltgerät mit einer Vorrichtung zur Erfassung eines Härtegrades in einer Flüssigkeit und einer von einer Steuer- und/oder Regelungselektronik angesteuerte Signalvorrichtung zur Ausgabe von Informationen über den Härtegrad.The invention relates to a water-conducting household appliance with a device for detecting a degree of hardness in a liquid and a controlled by a control and / or electronic control signal device for outputting information about the degree of hardness.
Aus der Offenlegungsschrift DE 19721976 A1 ist ein Verfahren zum Feststellen eines unzulässig hohen Verkalkungsgrades einer optischen Messstrecke zur Messung der Trübung einer Lauge in einem mit kalkhaltigem Wasser betriebenen Haushaltgerät bekannt. Das Haushaltgerät weist eine Steuer- und Regelungselektronik auf, die die Messsignale der Messstrecke auswertet und ein Steuersignal abgibt, welches ein am Haushaltgerät angeordnetes Anzeigeelement ansteuert. Durch die in Abhängigkeit des Verkalkungsgrads angesteuerte Anzeigevorrichtung wird dem Benutzer des Gerätes somit signalisiert, dass der Verkalkungsgrad des Gerätes einen die Arbeitsergebnisse des Gerätes oder seiner Bestandteile und/oder dessen Lebensdauer ungünstig beeinflussenden Wert erreicht hat. Somit wird der Benutzer einerseits auf die durch eine Verkalkung drohende Schädigung des Gerätes hingewiesen. Andererseits kann eine solche Anzeige auf einen gezielten Einsatz von Entkalkungsmitteln genutzt und dadurch deren überflüssiger Einsatz vermieden werden.German patent application DE 19721976 A1 discloses a method for determining an inadmissibly high degree of calcification of an optical measuring section for measuring the turbidity of a liquor in a domestic appliance operated with kalkhaltigem water. The household appliance has control and regulating electronics which evaluate the measuring signals of the measuring path and emit a control signal which activates a display element arranged on the household appliance. As a result of the display device activated as a function of the degree of calcification, the user of the device is thus signaled that the degree of calcification of the device has reached a value that unfavorably influences the work results of the device or its components and / or its service life. Thus, the user is on the one hand pointed to the imminent damage caused by calcification of the device. On the other hand, such a display can be used on a targeted use of descaling agents and thereby avoiding their unnecessary use.
Nachteilig bei dieser Lösung ist jedoch, dass der vom Trübungssensor erfasste Messwert einen unzulässig hohen Härtegrad misst, bei dem bereits eine Verkalkung im Haushaltgerät stattgefunden hat. Der Benutzer wird jedoch nicht vor dem Einsetzen der Verkalkung im Haushaltgerät informiert, um frühzeitig Gegenmaßnahmen einzuleiten, die nicht zu Beschädigung im Haushaltgerät führen.A disadvantage of this solution, however, is that the measured value detected by the turbidity sensor measures an impermissibly high degree of hardness, in which calcification has already taken place in the household appliance. However, the user is not informed prior to the onset of calcification in the household appliance in order to take early countermeasures that do not lead to damage in the household appliance.
Der Erfindung liegt daher die Aufgabe zugrunde, bei wasserführenden Haushaltgeräten der eingangs genannten Art den Benutzer bereits über den Härtegrad zu informieren, bei dem Beschädigungen durch Verkalkung im wasserführenden Haushaltgerät drohen, jedoch noch keine Beschädigungen im wasserführenden Haushaltgerät aufgetreten sind. Diese Aufgabe wird dadurch gelöst, dass die Signaleinrichtung zur Ausgabe von Informationen eines unzulässigen oberhalb oder unterhalb eines Grenzwertes liegenden Härtegrads dient.The invention is therefore based on the object in water-bearing household appliances of the type mentioned to inform the user already about the degree of hardness, threaten the damage caused by calcification in water-bearing appliance, but no damage in water-bearing appliance have occurred. This object is achieved in that the signal device is used to output information of an impermissible degree of hardness lying above or below a limit value.
Durch diese vorteilhafte Anordnung ist sichergestellt, dass der Benutzer durch die Signaleinrichtung informiert wird, dass der Härtegrad der Reinigungsflüssigkeit denThis advantageous arrangement ensures that the user is informed by the signaling device that the degree of hardness of the cleaning liquid the
Messwert erreicht hat, der zur Verkalkung des wasserführenden Haushaltgerätes führen könnte. Somit ist der Benutzer in der Lage, Gegenmaßnahme einzuleiten, um eine drohende Schädigung des wasserführenden Haushaltgeräts zu verhindern. Der Benutzer kann zum Einen dem wasserführenden Haushaltgerät Entkalkungsmittel zudosieren oder zum Anderen eine externe, dem wasserführenden Haushaltgerät zugeordneteMeasured value has reached, which could lead to the calcification of the water-conducting household appliance. Thus, the user is able to take countermeasures to prevent impending damage to the water-bearing household appliance. On the one hand, the user can meter descaling agents into the water-bearing household appliance or, on the other hand, an external, water-bearing household appliance
Enthärtungsanlage einstellen. Durch diese Maßnahme ist sichergestellt, dass dieSet water softening system. This measure ensures that the
Lebensdauer des wasserführenden Haushaltgerätes verlängert wird.Life of the water-conducting household appliance is extended.
Nach einer bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, dass die Signaleinrichtung als Anzeigeeinrichtung ausgebildet ist.According to a preferred embodiment of the object of the invention, it is provided that the signal device is designed as a display device.
Diese Lösung bietet den Vorteil, das die Information des unzulässigen oberhalb oder unterhalb des Grenzwertes liegenden Härtegrads mittels der Anzeigeeinrichtung Visual isiert wird. Durch die Visualisierung erkennt der Benutzer, dass er Gegenmaßnahmen zur Reduzierung des Härtegrades einleiten muss, um die Lebensdauer des wasserführenden Haushaltgerätes zu verlängern.This solution offers the advantage that the information of the impermissible degree of hardness lying above or below the limit value is visualized by means of the display device Visual. By visualizing the user recognizes that he must take countermeasures to reduce the degree of hardness in order to extend the life of the water-bearing household appliance.
Bei einer weiteren vorteilhaften Ausgestaltung des Gegenstandes der Erfindung ist vorgesehen, dass die Anzeigeeinrichtung ein Display und/oder eine LED umfasst. Der wesentliche Vorteil liegt darin, dass die Herstellungskosten des Displays und der LED sehr kostengünstig durchzuführen sind. Ferner sind schriftliche Mitteilungen auf dem Display sofort erkennbar.In a further advantageous embodiment of the subject matter of the invention, it is provided that the display device comprises a display and / or an LED. The main advantage is that the manufacturing cost of the display and the LED are very inexpensive to perform. Furthermore, written messages are immediately recognizable on the display.
Nach einer alternativen Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, dass die Signaleinrichtung als akustische Signaleinrichtung ausgebildet ist. Der wesentliche Vorteil liegt darin, dass der Benutzer Informationen über den unzulässigen oberhalb oder unterhalb des Grenzwerts liegenden Härtegrad erhält, wenn er sich nicht im Nahbereich des wasserführenden Haushaltgerätes aufhält. Dadurch ist sichergestellt, dass der Benutzer bei dem Ertönen eines Signals Gegenmaßnahmen einleiten kann, um die Lebensdauer des wasserführenden Haushaltgerätes zu verlängern.According to an alternative embodiment of the subject matter of the invention, it is provided that the signal device is designed as an acoustic signal device. The main advantage is that the user obtains information about the impermissible degree of hardness lying above or below the limit value if he does not stay in the vicinity of the water-bearing household appliance. This is ensures that the user can initiate countermeasures when sounding a signal to extend the life of the water-bearing household appliance.
Nach einer bevorzugten Ausführungsform ist vorgesehen, dass die akustische Signaleinrichtung als Lautsprecher ausgebildet ist.According to a preferred embodiment, it is provided that the acoustic signal device is designed as a loudspeaker.
Diese Lösung zeichnet sich besonders dadurch aus, dass Lautsprecher sehr kostengünstig in ihrer Herstellung sind.This solution is particularly characterized by the fact that speakers are very inexpensive to manufacture.
Entsprechend einer weiteren bevorzugten Ausführungsform ist vorgesehen, dass die Signaleinrichtung an einer Tür des wasserführenden Haushaltgerätes angeordnet ist.According to a further preferred embodiment, it is provided that the signal device is arranged on a door of the water-conducting household appliance.
Das wasserführende Haushaltgerät weist somit den Vorteil auf, dass die Signaleinrichtung stets im Blickfeld des Benutzers angeordnet ist. Im Falle der akustischen Signaleinrichtung ist sichergestellt, dass die Schallwellen sich gut im Raum ausbreiten können und der Benutzer stets Informationen über den unzulässigen oberhalb oder unterhalb eines Grenzwerts liegenden Härtegrads erhält. Bei einer Anzeigeeinrichtung ist der Benutzer ebenfalls in der Lage, Informationen über den unzulässigen oberhalb oder unterhalb eines Grenzwertes liegenden Härtegrad abzulesen, da die Signaleinrichtung an der Tür stets im Blickfeld des Benutzers liegt.The water-conducting household appliance thus has the advantage that the signal device is always arranged in the field of vision of the user. In the case of the acoustic signaling device, it is ensured that the sound waves can propagate well in the room and the user always receives information about the impermissible degree of hardness lying above or below a limit value. In the case of a display device, the user is also able to read information about the impermissible degree of hardness lying above or below a limit value, since the signal device at the door is always within the field of vision of the user.
Entsprechend einer weiteren bevorzugten Ausführungsform ist vorgesehen, dass die Vorrichtung zur Erfassung des Härtegrads als optischer Sensor ausgebildet ist. Diese Lösung zeichnet sich besonders dadurch aus, dass der optische Sensor sehr kostengünstig in seiner Herstellung ist und die Messwerte zur Bestimmung genauer erfasst werden, da der Sender weniger anfällig gegen Störungen hervorgerufen durch die umströmende Flüssigkeit ist.According to a further preferred embodiment, it is provided that the device for detecting the degree of hardness is designed as an optical sensor. This solution is characterized in particular by the fact that the optical sensor is very inexpensive to manufacture and the measured values are more accurately detected for determination, since the transmitter is less susceptible to disturbances caused by the liquid flowing around.
Nach einer alternativen Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, dass die Vorrichtung zur Erfassung des Härtegrads als Leitwertsensor ausgebildet ist.According to an alternative embodiment of the object of the invention, it is provided that the device for detecting the degree of hardness is designed as a conductivity sensor.
Der Vorteil dieser Lösung liegt darin, dass der Leitwertsensor kostengünstig in seiner Herstellung ist. - A -The advantage of this solution is that the conductivity sensor is inexpensive to manufacture. - A -
Die Erfindung ist in einer nachfolgenden Beschreibung anhand eines in der Zeichnung vereinfacht dargestellten Ausführungsbeispiels erläutert. Es zeigen:The invention is explained in a following description with reference to an embodiment shown in simplified form in the drawing. Show it:
Figur 1 eine schematisch dargestellte Geschirrspülmaschine gemäß einer ersten Ausführungsform, mit einer um eine horizontale Achse schwenkbar gelagerten Tür, auf deren Außenseite eine akustische Signaleinrichtung angeordnet ist, undFigure 1 is a schematically illustrated dishwasher according to a first embodiment, with a pivotally mounted about a horizontal axis door on the outside of an acoustic signaling device is arranged, and
Figur 2 eine schematisch dargestellte Geschirrspülmaschine gemäß einer zweiten Ausführungsform, mit einer um eine horizontale Achse schwenkbar gelagerten Tür, an deren Außenseite eine Anzeigeeinrichtung angeordnet ist.Figure 2 shows a schematically illustrated dishwasher according to a second embodiment, with a pivotally mounted about a horizontal axis door, on the outside of a display device is arranged.
In den Figuren Fig. 1 und Fig. 2 sind zwei im wesentlichen ähnlich ausgeführte erfindungsgemäße Geschirrspülmaschinen 1, V mit einem Gehäuse 2, 2' gezeigt. Ein nicht gezeigter Behandlungsraum ist über Tür 3, 31 zugänglich, die an einer horizontalen Achse schwenkbar gelagert ist. Die Tür 3, 31 weist eine nicht gezeigte Innentür und eine Außentür 4, 4' auf, an der eine Blende 5, 5' angeordnet ist. Auf der Blende 5, 5' sind Bedienelemente 6, 6' angeordnet, über die man ein Programm mit den einzelnen Programmschritten Vorspülen, Reinigen, Zwischenspülen, Klarspülen, Trocknen wählen kann. Die Außentür 4, 41 weist zum öffnen und Schließen eine an der Blende 5, 5' angeordnete Betätigungshandhabe 7, 7' auf. Des Weiteren ist an der Blende 5, 5' eine Signaleinrichtung 8, 81 zur Ausgabe von Informationen eines unzulässigen oberhalb oder unterhalb eines Grenzwerts liegenden Härtegrads angeordnet.FIGS. 1 and 2 show two essentially similar dishwashers 1, V according to the invention with a housing 2, 2 '. A not shown treatment room is accessible via door 3, 3 1 , which is pivotally mounted on a horizontal axis. The door 3, 3 1 has an inner door, not shown, and an outer door 4, 4 ', on which an aperture 5, 5' is arranged. On the panel 5, 5 'controls 6, 6' are arranged, via which one can select a program with the individual program steps pre-rinsing, cleaning, intermediate rinsing, rinsing, drying. The outer door 4, 4 1 has to open and close a at the aperture 5, 5 'arranged actuating handle 7, 7'. Furthermore, a signal device 8, 8 1 for outputting information of an impermissible degree of hardness above or below a limit value is arranged on the diaphragm 5, 5 '.
In Figur 1 ist die Signaleinrichtung 8 als akustische Signaleinrichtung ausgebildet. Die akustische Signaleinrichtung ist in dem dargestellten Ausführungsbeispiel als ein Lautsprecher ausgebildet, der bei dem unzulässigen oberhalb oder unterhalb des Grenzwertes liegenden Härtegrad ein akustisches Signal ausgibt.In Figure 1, the signaling device 8 is formed as an acoustic signaling device. The acoustic signal device is formed in the illustrated embodiment as a speaker that outputs an acoustic signal at the impermissible above or below the threshold level of hardness.
Bei dem unter Figur 2 gezeigten Ausführungsbeispiel ist die Signaleinrichtung 8' als Anzeigeeinrichtung ausgebildet. Auf der Anzeigeeinrichtung 8' wird bei dem unzulässigen oberhalb oder unterhalb des Grenzwertes liegenden Härtegrad ein Schriftzug visualisiert.In the embodiment shown under Figure 2, the signaling device 8 'is designed as a display device. A lettering is visualized on the display device 8 'at the impermissible degree of hardness lying above or below the limit value.
Alternativ könnte die Signaleinrichtung 8' auch als eine LED ausgebildet sein, die den unzulässigen oberhalb oder unterhalb des Grenzwerts liegenden Härtegrad durch das Anzeigen einer Farbe kenntlich macht.Alternatively, the signaling device 8 'could also be formed as an LED, the indicative of impermissibility above or below the threshold by indicating a color.
Die Signaleinrichtung 8, 8' ist mit einer nicht gezeigten Steuer- und Regelungselektronik verbunden, die von einer nicht gezeigten Vorrichtung zur Erfassung eines Härtegrades einer Flüssigkeit ein Messsignal erhält. Die Vorrichtung zur Erfassung eines Härtegrads in einer Flüssigkeit ist als optischer Sensor ausgebildet. Alternativ kann die Vorrichtung zur Erfassung eines Härtegrads als ein Leitwertsensor ausgebildet sein.The signaling device 8, 8 'is connected to a not shown control and regulation electronics, which receives a measurement signal from a device, not shown, for detecting a degree of hardness of a liquid. The device for detecting a degree of hardness in a liquid is designed as an optical sensor. Alternatively, the device for detecting a degree of hardness can be designed as a conductivity sensor.
Während des Betriebes misst der optische Sensor den Härtegrad einer Flüssigkeit, welche aus Wasser oder aus mit Reinigungsmittel versetztes Wasser besteht, die derDuring operation, the optical sensor measures the degree of hardness of a liquid, which consists of water or detergent-added water, which is the
Geschirrspülmaschine 1, V zugeführt wird. Um den Härtegrad zu erfassen, weist der optische Sensor einen Glaskörper auf, an dem sich kleine Kalkpartikel, die mindestens im mikroskopischen Bereich des Härtegrads liegen, absetzen. Ein Sender des optischenDishwasher 1, V is supplied. In order to detect the degree of hardness, the optical sensor has a glass body, on which small lime particles, which lie at least in the microscopic range of hardness, settle. A transmitter of the optical
Sensors sendet Lichtwellen in gleichen Frequenzen durch den Glaskörper zu einem ebenfalls dem optischen Sensor zugeordneten Empfänger. Der Empfänger misst die ankommende Lichtintensität und leitet das Messsignal an die Steuer- undSensor sends light waves in the same frequencies through the glass body to a receiver also associated with the optical sensor. The receiver measures the incoming light intensity and passes the measurement signal to the control and
Regelungselektronik weiter.Control electronics continue.
Es gibt zwei Bereiche, die dem Härtegrad der Flüssigkeit zugeordnet sind und zwar den Bereich in dem ein unzulässiger Härtegrad herrscht und einen Bereich in dem ein zulässiger Härtegrad herrscht. Im zulässigen Bereich wird die Geschirrspülmaschine nicht beschädigt und es liegen im wesentlichen keine Kalkpartikel in der Flüssigkeit vor, so dass der Empfänger die vom Sender gesendete maximale Lichtintensität empfängt.There are two areas which are assigned to the degree of hardness of the liquid, namely the area in which an impermissible degree of hardness prevails and an area in which a permissible degree of hardness prevails. Within the permissible range, the dishwasher will not be damaged and there will be essentially no lime particles in the liquid so that the receiver will receive the maximum light intensity transmitted by the transmitter.
Im unzulässigen Bereich kann die Geschirrspülmaschine oder das zu waschende Gut beschädigt werden und es liegen Kalkpartikel in der Flüssigkeit vor. Die Kalkpartikel setzen sich während des Betriebes der Geschirrspülmaschine auf dem Glaskörper des optischen Sensors ab, so dass der Empfänger nicht die vom Sender gesendete maximale Lichtintensität, sondern nur einen verringerten Anteil der vom Sender gesendeten Lichtintensität empfängt. Mikroskopische Kalkpartikel liegen zwar im unzulässigen Bereich des Härtegrads vor, haben aber keinen Einfluss auf die Lebensdauer der Geschirrspülmaschine. Daher sind Beschädigungen in der Geschirrspülmaschine und am zu waschenden Gut ausgeschlossen. Der Grenzwert im unzulässigen Bereich des Härtegrads ist dadurch definiert, dass sich erste Ablagerungen von mikroskopisch kleinen Kalkpartikel am Glaskörper des optischen Sensors bilden. Der Empfänger des optischen Sensors empfängt in diesem Fall nicht die maximale Lichtintensität die vom Sender gesendet wird. Steigt nun der Härtegrad der Flüssigkeit, so erhöht sich die Anzahl der Kalkpartikel und der Härtegrad ist oberhalb des Grenzwerts. Dadurch empfängt der Empfänger eine geringere Lichtintensität und die Signaleinrichtung wird über die Steuer- und Regelungselektronik aktiviert, so dass der Benutzer Maßnahmen zur Entkalkung der Flüssigkeit einleiten kann.In the impermissible area, the dishwasher or the goods to be washed can be damaged and lime particles are present in the liquid. The lime particles settle on the glass body of the optical sensor during operation of the dishwasher, so that the receiver does not receive the maximum light intensity transmitted by the transmitter, but only a reduced proportion of the light intensity transmitted by the transmitter. Although microscopic lime particles are present in the impermissible degree of hardness, they have no influence on the life of the dishwasher. Therefore, damage in the dishwasher and the goods to be washed are excluded. The limit value in the impermissible range of the degree of hardness is defined by the fact that first deposits of microscopically small lime particles form on the glass body of the optical sensor. The receiver of the optical sensor in this case does not receive the maximum light intensity transmitted by the transmitter. If the degree of hardness of the liquid increases, the number of lime particles increases and the degree of hardness is above the limit value. As a result, the receiver receives a lower light intensity and the signaling device is activated via the control and regulating electronics, so that the user can initiate measures for decalcifying the liquid.
Eine alternative Möglichkeit den Grenzwert zu definieren, besteht darin, den optischen Sensor werkseitig zu kalibrieren. Der Grenzwert ist dann dadurch definiert, dass die vomAn alternative way of defining the limit is to calibrate the optical sensor at the factory. The limit is then defined by the fact that the
Empfänger empfangene Lichtintensität equivalent zu einer werkseitig bestimmten Anzahl von am Glaskörper angeordneten Kalkpartikeln ist. Ist die Anzahl der Kalkpartikel in derReceiver received light intensity is equivalent to a factory determined number of lime particles arranged on the glass body. Is the number of lime particles in the
Flüssigkeit geringer, so setzen sich weniger mikroskopische Kalkpartikel am Glaskörper ab und der Empfänger empfängt nicht die maximale Lichtintensität, jedoch eine höhere Lichtintensität als die bei der werkseitig eingestellten Kalibrierung. In diesem Fall ist der unzulässige Härtegrad unterhalb des Grenzwerts im unzulässigen Bereich angeordnet.Less liquid, less microscopic lime particles are deposited on the glass body and the receiver does not receive the maximum light intensity, but a higher light intensity than that in the factory-set calibration. In this case, the impermissible degree of hardness is below the limit in the impermissible range.
Es sei darauf hingewiesen, dass die mikroskopischen Kalkpartikel keinen Einfluss auf die Lebensdauer der Geschirrspülmaschine haben.It should be noted that the microscopic lime particles have no effect on the life of the dishwasher.
Im Falle, dass der optische Sensor den unzulässigen oberhalb oder unterhalb des Grenzwerts liegenden Härtegrad misst, gibt der Empfänger ein Messsignal an die Steuer- und Regelungselektronik ab.In the event that the optical sensor measures the impermissible degree of hardness above or below the limit value, the receiver sends a measuring signal to the control electronics.
Es ist möglich zwei optische Sensoren in der Geschirrspülmaschine anzuordnen, wobei ein optischer Sensor den unzulässigen Härtgrade über dem Grenzwert und ein andere Sensor den unzulässigen Härtegrad unter dem Grenzwert misst. Dadurch ist eine effektivere und noch sicherer Überwachung des Kalkgehalts in der Flüssigkeit gewährleistet.It is possible to place two optical sensors in the dishwasher with one optical sensor measuring the impermissible levels of hardness above the threshold and another sensor measuring the impermissible level of hardness below the threshold. This ensures a more effective and even more reliable monitoring of the lime content in the liquid.
Die Steuer- und Regelungselektronik steuert dann die Signaleinrichtung an, so dass der Benutzer über den erhöhten Härtegrad informiert wird. Die Information kann über das Display oder alternativ über die LED abgegeben werden, wie in Figur 1 gezeigt, oder über den Lautsprecher, wie in Figur 2 gezeigt, der ein akustisches Signal erzeugt. In beiden Fällen wird der Benutzer darüber informiert, dass er Maßnahmen einleiten muss, um den Härtegrad der Flüssigkeit zu senken. Zum Einen kann er eine externe Enthärtungsanlage, die der Geschirrspülmaschine 1 , 1' zugeordnet ist, einstellen. Zum Anderen kann er der Geschirrspülmaschine 1 , 1' Entkalkungsmittel zuführen, so dass der Härtegrad gesenkt wird. Bei Anwendung beider Maßnahmen kann auf eine Enthärtungsanlage in der Geschirrspülmaschine verzichtet werden. Nach der Durchführung dieser Maßnahmen wird die Signaleinrichtung 8, 8' von der Steuer- und Regelungselektronik deaktiviert, da der vom optischen Sensor erfasste Härtegrad im zulässigen Bereich liegt und somit keine Beschädigungen durch Kalkablagerungen entstehen können. Durch die eingeleiteten Maßnahmen der Entkalkung umfließt nun entkalte Flüssigkeit den Glaskörper des optischen Sensors, so dass die am Glaskörper angeordneten mikroskopischen Kalkpartikel fortgeschwemmt werden und der Glaskörper frei von Kalkpartikeln ist. The control electronics then controls the signaling device, so that the user is informed of the increased degree of hardness. The information can be delivered via the display or alternatively via the LED, as shown in FIG. 1, or via the speaker, as shown in Figure 2, which generates an acoustic signal. In both cases, the user is informed that he must take measures to lower the degree of hardness of the liquid. On the one hand, he can set an external water softening system associated with the dishwasher 1, 1 '. On the other hand, it can supply descaling agent to the dishwasher 1, 1 ', so that the degree of hardness is lowered. When using both measures can be dispensed with a water softener in the dishwasher. After carrying out these measures, the signaling device 8, 8 'is deactivated by the control and regulating electronics, since the degree of hardness detected by the optical sensor is within the permissible range and thus can not be damaged by calcium deposits. Due to the decalcifying measures introduced, decanted liquid now flows around the glass body of the optical sensor, so that the microscopic lime particles arranged on the glass body are swept away and the glass body is free of lime particles.

Claims

Patentansprüche claims
1. Wasserführendes Haushaltgerät (1,1') mit einer Vorrichtung zur Erfassung eines Härtegrads in einer Flüssigkeit und eine von einer Steuer- und/oder Regelungselektronik angesteuerte Signalvorrichtung (8,8') zur Ausgabe von Informationen über den Härtegrad, dadurch gekennzeichnet, dass die1. Water-conducting domestic appliance (1,1 ') with a device for detecting a degree of hardness in a liquid and a controlled by a control and / or electronic control signaling device (8,8') for outputting information about the degree of hardness, characterized in that the
Signaleinrichtung (8,8') zur Ausgabe von Informationen eines unzulässigen oberhalb oder unterhalb eines Grenzwerts liegenden Härtegrads dient.Signal means (8,8 ') for outputting information of an impermissible lying above or below a threshold degree of hardness is used.
2. Wasserführendes Haushaltgerät (1,1') nach Anspruch 1 , dadurch gekennzeichnet, dass die Signaleinrichtung (8,8') als Anzeigeeinrichtung ausgebildet ist.2. Water-conducting domestic appliance (1,1 ') according to claim 1, characterized in that the signaling device (8,8') is designed as a display device.
3. Wasserführendes Haushaltgerät (1,1') nach Anspruch 2, dadurch gekennzeichnet, dass die Anzeigeeinrichtung ein Display und/oder eine LED umfasst.3. Water-conducting domestic appliance (1,1 ') according to claim 2, characterized in that the display device comprises a display and / or an LED.
4. Wasserführendes Haushaltgerät (1,1') nach Anspruch 1 , dadurch gekennzeichnet, dass die Signaleinrichtung (8,8') als akustische Signaleinrichtung ausgebildet ist.4. Water-conducting domestic appliance (1,1 ') according to claim 1, characterized in that the signaling device (8,8') is designed as an acoustic signaling device.
5. Wasserführendes Haushaltgerät (1 ,1') nach Anspruch 4, dadurch gekennzeichnet, dass die akustische Signaleinrichtung (8,8') als Lautsprecher ausgebildet ist.5. Water-conducting domestic appliance (1, 1 ') according to claim 4, characterized in that the acoustic signal device (8,8') is designed as a loudspeaker.
6. Wasserführendes Haushaltgerät (1,1') nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Signaleinrichtung (8,8') an einer Tür (3,3') des wasserführenden Haushaltgeräts (1 ,1') angeordnet ist.6. Water-conducting domestic appliance (1,1 ') according to one of claims 1 to 5, characterized in that the signaling device (8,8') on a door (3,3 ') of the water-conducting household appliance (1, 1') is arranged ,
7. Wasserführendes Haushaltgerät (1,1') nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Vorrichtung zur Erfassung des Härtegrads als optischer Sensor ausgebildet ist.7. Water-conducting domestic appliance (1,1 ') according to one of claims 1 to 6, characterized in that the device for detecting the degree of hardness is designed as an optical sensor.
8. Wasserführendes Haushaltgerät (1,1') nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Vorrichtung zur Erfassung des Härtegrads als8. Water-conducting domestic appliance (1,1 ') according to one of claims 1 to 6, characterized in that the device for detecting the degree of hardness as
Leitwertsensor ausgebildet ist. Conductance sensor is formed.
PCT/EP2005/055452 2005-02-03 2005-10-21 Water guiding domestic appliance WO2006081878A1 (en)

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CN101111636B (en) 2012-03-28

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