EP0644291A1 - Method and device for determining the specific parameters of the laundry in household washing machines - Google Patents

Method and device for determining the specific parameters of the laundry in household washing machines Download PDF

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Publication number
EP0644291A1
EP0644291A1 EP94113750A EP94113750A EP0644291A1 EP 0644291 A1 EP0644291 A1 EP 0644291A1 EP 94113750 A EP94113750 A EP 94113750A EP 94113750 A EP94113750 A EP 94113750A EP 0644291 A1 EP0644291 A1 EP 0644291A1
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EP
European Patent Office
Prior art keywords
laundry
washing
drum
specific parameters
tub
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.)
Withdrawn
Application number
EP94113750A
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German (de)
French (fr)
Inventor
Rainer Dr. Dipl.-Phys. Stamminger
Alfred Ing. Henninger (Fh)
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AEG Hausgeraete GmbH
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Licentia Patent Verwaltungs GmbH
AEG Hausgeraete GmbH
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Publication of EP0644291A1 publication Critical patent/EP0644291A1/en
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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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/18—Condition of the laundry, e.g. nature or weight
    • 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
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/04—Quantity, e.g. weight or variation of weight
    • 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
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/06—Type or material
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/18—Washing liquid level
    • 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
    • D06F2103/38—Time, e.g. duration
    • 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
    • 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
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
    • D06F2105/48—Drum speed

Definitions

  • the invention relates to a method for determining laundry-specific parameters in household washing machines according to the preamble of claim 1 and a device for performing the method.
  • a device for performing the method In the narrower sense, it concerns both the recording and the adaptation of said parameters to the requirements of different textiles.
  • the amount and type of laundry primarily determine the course of a washing program; To optimize the program sequence and thus to achieve good washing results, both values must be known exactly.
  • the bottom of a tub which is mounted on vibrating shock absorbers, is connected to an altitude measuring device via a rigid flow line.
  • the altitude measuring device includes essentially from a device operating on the principle of float or pressure measurement.
  • An elastic sensor rod in the form of a Bowden cable is attached to the float or the diaphragm of the pressure cell, which moves together with the diaphragm or the float and transmits the diaphragm deflection or the float stroke to a position transmitter.
  • an iron core is attached to the free end of the sensor rod, which is guided in a longitudinally movable manner in a coil of said position sensor. The line ends of the coil are connected to an evaluation device.
  • the mass of the laundry item introduced is determined in the known method as follows: after loading the washing machine and after starting the program, the laundry drum is operated for at least one revolution and the measured altitude value is stored. The mass introduced lowers the tub against the frictional force of the shock absorbers. The amount of water supplied is determined during the feed. The water weight further lowers the tub. At the same time, however, the pressure cell membrane is acted on and the sensor rod is raised. The amount of water supplied results from the difference between the last determined value and the stored altitude measurement value of the dry laundry item introduced.
  • the laundry drum After detecting the amount of water supplied, the laundry drum is rotated for a certain time and the laundry is thereby wetted. After the laundry drum has stopped, the altitude is measured again and the amount of water absorbed by the laundry is determined. A computer determines the specific absorbency of the laundry item based on the dry weight of the laundry and the amount of water absorbed.
  • the detection and electrical preparation of laundry-specific parameters require considerable and costly effort in the known method.
  • the height measuring device required for this consists, for example, of a float, float housing (or diaphragm pressure cell), sensor rod, iron core, core housing and suspension spring.
  • the position transmitter consists of a coil with housing that is fixed and separately arranged on the device. The measured values induced here are fed to an evaluation device via connecting lines.
  • the invention has for its object to provide a simple and quickly feasible method and an apparatus therefor, which both improve the quantity dependency and adapt laundry-specific parameters to the requirements of the most varied textiles, i.e. Types of laundry allowed.
  • the diagram illustrates the pressure curve, i.e. the water level change during the drum reversing downtime with different laundry loads.
  • a drum reversing cycle runs at the beginning of each washing program.
  • the laundry drum rotates alternately in clockwise and counter-clockwise rotation with certain drum speeds or speeds of rotation with intervening drum stoppages ts before each change of direction. While reversing, the laundry moving in the drum sucks lye out of the tub. During the drum downtimes ts, the laundry falls onto the drum base, the weight of the items of laundry lying above pushing down on the items below and thus pressing some of the items lye that has already been soaked up, which then seeps back into the tub.
  • the amount of lye L1, L2 squeezed out again and again during the drum standstill times ts and their dripping or outlet speed v1, v2 ... depend on the amount of laundry introduced, the type of laundry and the laundry moisture already carried out. Both values L1, L2 and v1, v2 are used to adapt the aforementioned laundry-specific parameters for an optimal washing process.
  • Analog pressure measuring device also called analog pressure switch or analog pressure cell. It is an electronic pressure sensor that supplies output signals in the form of direct electrical voltage U A approximately linearly to its pressurization. Analog pressure transducers are connected hydraulically in the same way as normal diaphragm pressure switches, but they have much higher response accuracies.
  • the diagram shows the pressure P (millimeter water column mmWs in the tub), respectively the output signal U A (V) of the measuring device as a function of the drum standstill time ts with the drum loading quantity as a parameter.
  • the squeezed amount of lye L1 corresponds to the output difference signal
  • the respective suds exit velocities v1 ... correspond to the momentary curve rise
  • the amount of alkali L2 squeezed out during the drum standstill time ts (L2 being much larger than L1) produces the output difference signal (in which much larger than The suds exit velocities v2 ... again result from the instantaneous rise values
  • fuzzy rules such as B .: if "L” is very large and “v” is low, then “lots of cotton laundry” or: if "L” is medium and “v” is large, then “lots of synthetic fiber laundry”.

Abstract

2.1 A known method determines laundry-specific parameters, such as the introduced dry laundry mass, the water level and the bound liquor, by means of a float-actuated or diaphragm-actuated mechanical linkage, to the end of which an iron core guided in a coil is attached. Rising water levels and the mechanical lowering of the tub mounted on shock absorbers induce in the coil electrical quantities which are fed to an evaluation circuit. 2.2 The method according to the invention determines during the reversing mode, specifically solely in the drum standstill times (ts), the lye quantity (L1, L2) expressed from the laundry and running back into the tank and its outflow velocities (v1, v2), by means of an electronic analogue pressure cell. Its output signals <IMAGE> are compared with other quantities and information relating to the introduced laundry quantity and the type of laundry is obtained therefrom. 2.3 The method is suitable for optimizing washing programmes in electronically controlled domestic washing machines. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zur Ermittlung wäschespezifischer Parameter in Haushalt-Waschmaschinen nach dem Oberbegriff des Anspruchs 1 und eine Vorrichtung zur Durchführung des Verfahrens. Sie betrifft im engeren Sinn sowohl die Erfassung als auch die Anpassung besagter Parameter an die Erfordernisse verschiedener Textilien.The invention relates to a method for determining laundry-specific parameters in household washing machines according to the preamble of claim 1 and a device for performing the method. In the narrower sense, it concerns both the recording and the adaptation of said parameters to the requirements of different textiles.

Wäschemenge und Wäscheart bestimmen in erster Linie den Ablauf eines Waschprogramms; für eine Optimierung des Programmablaufs und damit zur Erzielung guter Waschergebnisse müssen beide Werte genauestens bekannt sein.The amount and type of laundry primarily determine the course of a washing program; To optimize the program sequence and thus to achieve good washing results, both values must be known exactly.

Hierzu ist aus der DE 41 41 213 A1 ein "Verfahren zum Bestimmen der Wäsche-Trockenmasse, des Wasserstands und der gebundenen Flotte in einer Trommelwaschmaschine" bekanntgeworden.For this purpose, from DE 41 41 213 A1 a "method for determining the laundry dry matter, the water level and the bound liquor in a drum washing machine" has become known.

Beim Stand der Technik ist der Boden eines auf Reibungsstoßdämpfern schwingend gelagerten Laugenbehälters über eine starre Strömungsleitung mit einem Höhenlage-Meßgerät verbunden. Das Höhenlage-Meßgerät besteht u.a. im Wesentlichen aus einem nach dem Schwimmer- oder Druckdosen- Meßprinzip arbeitenden Gerät. Am Schwimmer bzw. an der Membrane der Druckdose ist eine elastische Geberstange in Form eines Bowdenzugs befestigt, der sich mit der Membrane oder dem Schwimmer zusammen bewegt und die Membranauslenkung bzw. den Schwimmerhub auf einen Positionsgeber überträgt. Hierfür ist am freien Ende der Geberstange ein Eisenkern befestigt, der in einer Spule besagten Positionsgebers longitudinal beweglich geführt ist. Die Leitungsenden der Spule sind mit einer Auswerteeinrichtung verbunden.In the prior art, the bottom of a tub, which is mounted on vibrating shock absorbers, is connected to an altitude measuring device via a rigid flow line. The altitude measuring device includes essentially from a device operating on the principle of float or pressure measurement. An elastic sensor rod in the form of a Bowden cable is attached to the float or the diaphragm of the pressure cell, which moves together with the diaphragm or the float and transmits the diaphragm deflection or the float stroke to a position transmitter. For this purpose, an iron core is attached to the free end of the sensor rod, which is guided in a longitudinally movable manner in a coil of said position sensor. The line ends of the coil are connected to an evaluation device.

Die Masse des eingebrachten Wäschepostens wird bei dem bekannten Verfahren wie folgt bestimmt: Nach dem Beladen der Waschmaschine und nach dem Starten des Programmablaufs wird die Wäschetrommel für mindestens eine Umdrehung betrieben und der Höhenlage-Meßwert abgespeichert. Die eingebrachte Masse senkt hierbei den Laugenbehälter gegen die Reibungskraft der Stoßdämpfer ab. Die Bestimmung der zugeführten Wassermenge erfolgt während des Zulaufs. Das Wassergewicht senkt den Laugenbehälter noch weiter ab. Gleichzeitig wird jedoch die Druckdosenmembrane beaufschlagt und deren Geberstange angehoben. Die zugeführte Wassermenge ergibt sich aus der Differenz des zuletzt ermittelten Wertes und dem abgespeicherten Höhenlagen-Meßwert des eingebrachten Trockenwäschepostens.The mass of the laundry item introduced is determined in the known method as follows: after loading the washing machine and after starting the program, the laundry drum is operated for at least one revolution and the measured altitude value is stored. The mass introduced lowers the tub against the frictional force of the shock absorbers. The amount of water supplied is determined during the feed. The water weight further lowers the tub. At the same time, however, the pressure cell membrane is acted on and the sensor rod is raised. The amount of water supplied results from the difference between the last determined value and the stored altitude measurement value of the dry laundry item introduced.

Nach Erfassung der zugeführten Wassermenge wird die Wäschetrommel für eine bestimmte Zeit gedreht und die Wäsche hierdurch benetzt. Nach dem Anhalten der Wäschetrommel erfolgt eine erneute Höhenlage-Messung und die von der Wäsche aufgenommene Wassermenge wird bestimmt. Ein Rechner ermittelt aufgrund der Trockenmasse der Wäsche und der aufgenommenen Wassermenge die spezifische Saugfähigkeit des Wäschepostens.After detecting the amount of water supplied, the laundry drum is rotated for a certain time and the laundry is thereby wetted. After the laundry drum has stopped, the altitude is measured again and the amount of water absorbed by the laundry is determined. A computer determines the specific absorbency of the laundry item based on the dry weight of the laundry and the amount of water absorbed.

Die Erfassung und elektrische Aufbereitung von wäschespezifischen Parametern bedingen beim bekannten Verfahren einen beträchtlichen und kostenspieligen Aufwand. Das hierfür erforderliche Höhenlage-Meßgerät besteht beispielsweise aus Schwimmer, Schwimmergehäuse (oder Membrandruckdose), Geberstange, Eisenkern, Kerngehäuse und Aufhängefeder. Der Positionsgeber besteht aus einer am Gerät ortsfest und separat angeordneten Spule mit Gehäuse. Die hierin induzierten Meßwerte werden über Anschlußleitungen einer Auswerteeinrichtung zugeführt.The detection and electrical preparation of laundry-specific parameters require considerable and costly effort in the known method. The height measuring device required for this consists, for example, of a float, float housing (or diaphragm pressure cell), sensor rod, iron core, core housing and suspension spring. The position transmitter consists of a coil with housing that is fixed and separately arranged on the device. The measured values induced here are fed to an evaluation device via connecting lines.

Die Erfindung hat die Aufgabe, ein einfaches und rasch durchführbares Verfahren sowie eine Vorrichtung hierfür zu schaffen, welche sowohl eine Verbesserung der Mengenabhängigkeit als auch eine Anpassung von wäschespezifischen Parametern an die Erfordernisse der verschiedensten Textilien, d.h. Wäschearten, gestattet.The invention has for its object to provide a simple and quickly feasible method and an apparatus therefor, which both improve the quantity dependency and adapt laundry-specific parameters to the requirements of the most varied textiles, i.e. Types of laundry allowed.

Diese Aufgabe wird gemäß der Erfindung durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.This object is achieved according to the invention by the characterizing features of claim 1.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind den Unteransprüchen zu entnehmen.Further advantageous embodiments of the invention can be found in the subclaims.

Die mit der Erfindung erzielbaren Vorteile sind folgender Art:
Mittels eines einzigen, handelsüblichen und äußerst preiswerten Meßmittels werden wäschespezifische Parameter rasch, einfach und äußerst genau erfaßt; bislang angewendete Meßmethoden können ergänzt werden. Das zu verarbeitende Meßsignal wird direkt im Meßmittel selbst erzeugt und unmittelbar den in Trommelwaschmaschinen bereits serienmäßig vorhandenen Elektroniken oder Mikroprozessoren zugeführt.The advantages that can be achieved with the invention are as follows:
Using a single, commercially available and extremely inexpensive measuring device, laundry-specific parameters are recorded quickly, easily and extremely precisely; Measurement methods previously used can be supplemented. The measurement signal to be processed is generated directly in the measuring device itself and is fed directly to the electronics or microprocessors that are already standard in drum washing machines.

Ein Ausführungsbeispiel der Erfindung ist anhand eines Diagramms dargestellt und wird im folgenden näher erläutert.An embodiment of the invention is illustrated by a diagram and is explained in more detail below.

Das Diagramm veranschaulicht den Druckverlauf, d.h. die Wasserniveauänderung während der Trommelreversier-Stillstandszeit bei unterschiedlichen Wäschebeladungen.The diagram illustrates the pressure curve, i.e. the water level change during the drum reversing downtime with different laundry loads.

Zu Beginn jeden Waschprogramms läuft ein Trommel-Reversierzyklus ab. Die Wäschetrommel dreht hierbei mit bestimmten Umdrehungszahlen, respektive Umdrehungsgeschwindigkeiten abwechselnd im Rechts- und im Linkslauf mit dazwischenliegenden Trommelstillstandszeiten ts vor jedem Drehrichtungswechsel. Während des Reversierens saugt die in der Trommel bewegte Wäsche Lauge aus dem Bottich. Während der Trommelstillstandszeiten ts fällt die Wäsche auf den Trommelboden, dabei drückt das Gewicht der obenliegenden Wäschestücke auf die darunterliegenden und preßt somit einen Teil der bereits aufgesogenen Lauge wiederum heraus, die anschließend in den Bottich zurücksickert. Die während der Trommelstillstandszeiten ts immer wieder ausgepreßten Laugenmengen L1, L2 sowie deren Abtropf- oder Austrittsgeschwindigkeit v1, v2... sind von der eingebrachten Wäschenmenge, der Wäscheart und der bereits erfolgten Wäschedurchfeuchtung abhängig. Beide Werte L1, L2 und v1, v2 werden zu einer Anpassung der vorerwähnten wäschespezifischen Parameter für einen optimalen Waschprozeß genutzt.A drum reversing cycle runs at the beginning of each washing program. The laundry drum rotates alternately in clockwise and counter-clockwise rotation with certain drum speeds or speeds of rotation with intervening drum stoppages ts before each change of direction. While reversing, the laundry moving in the drum sucks lye out of the tub. During the drum downtimes ts, the laundry falls onto the drum base, the weight of the items of laundry lying above pushing down on the items below and thus pressing some of the items lye that has already been soaked up, which then seeps back into the tub. The amount of lye L1, L2 squeezed out again and again during the drum standstill times ts and their dripping or outlet speed v1, v2 ... depend on the amount of laundry introduced, the type of laundry and the laundry moisture already carried out. Both values L1, L2 and v1, v2 are used to adapt the aforementioned laundry-specific parameters for an optimal washing process.

Erfassung und Bestimmung der während der Trommelstillstandszeiten ts jeweils austretenden Laugengesamtmengen L1, L2 erfolgt z. B. durch eine laufende Überwachung des Wasserstandes im Laugenbehälter mit Hilfe einer sogenannten "Analog-Druckmeßeinrichtung" (auch Analog-Druckwächter oder Analog-Druckmeßdose genannt). Es handelt sich hierbei um einen elektronischen Drucksensor, der in etwa linear zu seiner Druckbeaufschlagung Ausgangssignale in Form elektrischer Gleichspannung UA liefert. Analog-Druckmeßdosen werden hydraulisch genauso angeschlossen wie normale Membran-Druckschalter, sie besitzen jedoch ungleich höhere Ansprechgenauigkeiten.Detection and determination of the total amount of lye L1, L2 escaping during the drum downtime ts takes place, for. B. by continuous monitoring of the water level in the tub with the help of a so-called "analog pressure measuring device" (also called analog pressure switch or analog pressure cell). It is an electronic pressure sensor that supplies output signals in the form of direct electrical voltage U A approximately linearly to its pressurization. Analog pressure transducers are connected hydraulically in the same way as normal diaphragm pressure switches, but they have much higher response accuracies.

Das Diagramm zeigt den Druck P (Millimeter Wassersäule mmWs im Laugenbehälter), respektive das Ausgangssignal UA (V) der Meßeinrichtung in Abhängigkeit von der Trommelstillstandszeit ts mit der Trommelbeladungsmenge als Parameter.The diagram shows the pressure P (millimeter water column mmWs in the tub), respectively the output signal U A (V) of the measuring device as a function of the drum standstill time ts with the drum loading quantity as a parameter.

Die erste Kurve P0 = f (t) = c

Figure imgb0001
veranschaulicht den Druckverlauf bei unbeladener Wäschetrommel (kein Druckanstieg, keine ausgepreßte Lauge).The first curve P0 = f (t) = c
Figure imgb0001
 illustrates the pressure curve when the laundry drum is empty (no pressure increase, no squeezed-out lye).

Die zweite Kurve P1 = f (t)

Figure imgb0002
zeigt den Druckverlauf bei einer Trommelbeladung mit beispielsweise 0,75 kg Wäsche. Die ausgepreßte Laugenmenge L1 entspricht dem Ausgangs-Differenzsignal
Figure imgb0003

Die jeweiligen Laugenaustrittsgeschwindigkeiten v1... entsprechen dem momentanen Kurvenanstieg
Figure imgb0004
 The second curve P1 = f (t)
Figure imgb0002
 shows the pressure curve for a drum load with, for example, 0.75 kg of laundry. The squeezed amount of lye L1 corresponds to the output difference signal
Figure imgb0003

The respective suds exit velocities v1 ... correspond to the momentary curve rise
Figure imgb0004

Die dritte Kurve P2 = f (t)

Figure imgb0005
veranschaulicht den Druckverlauf bei einer Trommelbeladung mit 5,0 kg Wäsche. Die während der Trommelstillstandszeit ts ausgepreßte Laugenmenge L2 (wobei L2 sehr viel größer als L1) erzeugt das Ausgangsdifferenzsignal
Figure imgb0006

(wobei
Figure imgb0007

sehr viel größer als
Figure imgb0008

Die Laugenaustrittsgeschwindigkeiten v2... ergeben sich wiederum aus den Momentananstiegswerten
Figure imgb0009
 The third curve P2 = f (t)
Figure imgb0005
 illustrates the pressure curve for a drum load with 5.0 kg of laundry. The amount of alkali L2 squeezed out during the drum standstill time ts (L2 being much larger than L1) produces the output difference signal
Figure imgb0006

(in which
Figure imgb0007

much larger than
Figure imgb0008

The suds exit velocities v2 ... again result from the instantaneous rise values
Figure imgb0009

Diese erfassten Größen ΔUA (= L) und v werden zu definierten Zeiten während der Reversierpause und zu definierten Zeiten nach Beginn des Waschprogramms in einen Mikroprozessor eingespeist und mit anderen Größen wie:
vom Benutzer angewähltes Waschprogramm,
seit Programmbeginn abgelaufene Waschzeit und momentane Waschlaugentemperatur
laufend verglichen und hieraus Informationen bezüglich eingebrachter Wäschemenge und Wäscheart gewonnen.
Sodann können nun letztendlich Steuer- und Regelgrößen wie:
erforderliches Waschniveau (Laugenstand),
Anzahl der erforderlichen Spülgänge,
erforderliche Spülwassermenge
und erforderliche Wäschetrommeldrehzahl für den Waschprozeß abgeleitet werden.These recorded variables ΔU A (= L) and v are fed into a microprocessor at defined times during the reversing break and at defined times after the start of the washing program and with other variables such as:
washing program selected by the user,
washing time elapsed since the start of the program and current washing solution temperature
continuously compared and information about the quantity and type of laundry brought in is obtained.
Finally, control variables such as:
required washing level (suds level),
Number of rinses required,
required flushing water quantity
and the required drum speed for the washing process can be derived.

Die Informationsverarbeitung erfolgt in Form sogenannter Fuzzy-Regeln wie z. B.:
wenn "L" sehr groß und "v" gering, dann "viel Wäsche aus Baumwolle"
oder: wenn "L" mittel und "v" groß, dann "viel Wäsche aus Kunstfaser".The information processing takes place in the form of so-called fuzzy rules such as B .:
if "L" is very large and "v" is low, then "lots of cotton laundry"
or: if "L" is medium and "v" is large, then "lots of synthetic fiber laundry".

Claims (5)

Verfahren zur Ermittlung wäschespezifischer Parameter in Haushalt-Waschmaschinen mit einem Laugenbehälter, mit einer Laugenfüllstandsmeßeinrichtung, mit einer reversierbar angetriebenen Wäschetrommel und mit einem, den Waschprogrammablauf überwachenden Mikroprozessor, dadurch gekennzeichnet, daß in den Trommelreversier-Stillstandszeiten (ts) die aus der Wäsche, respektive die in den Behälter zurücksickernde Laugenmengen (L1, L2) sowie deren Abtropf- oder Austrittsgeschwindigkeiten (v1, v2) ermittelt werden.Method for determining laundry-specific parameters in household washing machines with a tub, with a tub fill level measuring device, with a reversibly driven laundry drum and with a microprocessor which monitors the washing program sequence, characterized in that in the drum reversing downtimes (ts) those from the laundry or the Leach amounts (L1, L2) seeping back into the container and their dripping or outlet speeds (v1, v2) are determined. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Laugenmengen (L1, L2) und die Austrittsgeschwindigkeiten (v1, v2) Größen darstellen, die zur Optimierung des Waschprogrammablaufs verwendet werden.Method according to Claim 1, characterized in that the amounts of alkali (L1, L2) and the exit speeds (v1, v2) represent quantities which are used to optimize the washing program sequence. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die wäschespezifischen Parameter (L1, L2, v1, v2) mit anderen Größen, wie vom Benutzer angewähltes Programm, seit Programmbeginn abgelaufene Waschzeit und momentan vorherrschende Waschlaugentemperatur verglichen werden.Method according to Claim 1, characterized in that the laundry-specific parameters (L1, L2, v1, v2) are compared with other variables, such as the program selected by the user, the washing time that has elapsed since the beginning of the program and the currently prevailing washing liquor temperature. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Vergleichswerte zur Bestimmung des Wäschegewichts, der Wäscheart, des erforderlichen Waschniveaus, der Anzahl der Spülgänge, der Spülwassermenge und der Wäschetrommel-Drehzahl verwendet werden.Method according to Claim 3, characterized in that the comparison values are used to determine the laundry weight, the type of laundry, the required washing level, the number of rinse cycles, the amount of rinsing water and the speed of the laundry drum. Vorrichtung zur Durchführung des Verfahrens, dadurch gekennzeichnet, daß zur Ermittlung der wäschespezifischen Parameter (L1, L2, v1, v2) eine analoge Druckmeßdose einsetzbar ist.Device for carrying out the method, characterized in that an analog pressure transducer can be used to determine the laundry-specific parameters (L1, L2, v1, v2).
EP94113750A 1993-09-17 1994-09-02 Method and device for determining the specific parameters of the laundry in household washing machines Withdrawn EP0644291A1 (en)

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DE4331603A DE4331603A1 (en) 1993-09-17 1993-09-17 Method for determining laundry-specific parameters in household washing machines and device for carrying out the method

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Cited By (5)

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US6958693B2 (en) 2002-05-24 2005-10-25 Procter & Gamble Company Sensor device and methods for using same
WO2008003577A1 (en) 2006-07-04 2008-01-10 BSH Bosch und Siemens Hausgeräte GmbH Method for treating laundry as well as a program-controlled washing machine suitable for this purpose
US7930787B2 (en) 2008-03-31 2011-04-26 Whirlpool Corporation Method for determining load size and/or setting water level in a washing machine
US7930786B2 (en) 2008-03-31 2011-04-26 Whirlpool Corporation Method for determining load size and/or setting water level in a washing machine
US8245342B2 (en) 2008-07-30 2012-08-21 Whirlpool Corporation Method for determining load size in a washing machine

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GB2081751A (en) * 1980-08-12 1982-02-24 Bosch Siemens Hausgeraete Water Level Regulation in an Automatic Washing Machine
DE3030491A1 (en) * 1980-08-12 1982-02-25 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Automatic liquor vol. control system for washing machine - times rates of increase of water level to estimate load size
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6958693B2 (en) 2002-05-24 2005-10-25 Procter & Gamble Company Sensor device and methods for using same
WO2008003577A1 (en) 2006-07-04 2008-01-10 BSH Bosch und Siemens Hausgeräte GmbH Method for treating laundry as well as a program-controlled washing machine suitable for this purpose
US7930787B2 (en) 2008-03-31 2011-04-26 Whirlpool Corporation Method for determining load size and/or setting water level in a washing machine
US7930786B2 (en) 2008-03-31 2011-04-26 Whirlpool Corporation Method for determining load size and/or setting water level in a washing machine
US8245342B2 (en) 2008-07-30 2012-08-21 Whirlpool Corporation Method for determining load size in a washing machine

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