WO2009033980A1 - Procédé de détection de mousse dans une machine à laver à tambour et machine à laver à tambour conçue à cet effet - Google Patents

Procédé de détection de mousse dans une machine à laver à tambour et machine à laver à tambour conçue à cet effet Download PDF

Info

Publication number
WO2009033980A1
WO2009033980A1 PCT/EP2008/061529 EP2008061529W WO2009033980A1 WO 2009033980 A1 WO2009033980 A1 WO 2009033980A1 EP 2008061529 W EP2008061529 W EP 2008061529W WO 2009033980 A1 WO2009033980 A1 WO 2009033980A1
Authority
WO
WIPO (PCT)
Prior art keywords
foam
drum
stored
washing machine
program control
Prior art date
Application number
PCT/EP2008/061529
Other languages
German (de)
English (en)
Inventor
Gundula Czyzewski
Bernhard Heym
Rainer Jurmann
Ingo Schulze
Horst Wiemer
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
Publication of WO2009033980A1 publication Critical patent/WO2009033980A1/fr

Links

Classifications

    • 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
    • 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
    • D06F2103/20—Washing liquid condition, e.g. turbidity
    • 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
    • D06F2103/24—Spin speed; Drum movements
    • 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
    • D06F2105/58—Indications or alarms to the control system or to the user
    • 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
    • D06F2105/58—Indications or alarms to the control system or to the user
    • D06F2105/60—Audible signals
    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/06—Arrangements for preventing or destroying scum

Definitions

  • the invention relates to a method for detecting foam in a drum washing machine and a drum washing machine suitable for this purpose.
  • the lye pump with which the extracted liquor should be pumped out does not promote the mixture of foam and lye, and the skidding must be omitted or interrupted.
  • the foam can escape from the openings of the tub as the tub ventilation and the filling hose. Early detection of foam and efficient measures to remove the foam are therefore important.
  • the detection of foam in a drum washing machine can be carried out via a conductance measurement with two electrodes in the lower region of a tub.
  • a detection when spinning a drum by means of an evaluation of the target / actual speed difference is possible.
  • foam brakes a rotating drum whereby there is a difference between the target and the actual speed.
  • the association between a certain concentration of foam and the target / actual speed difference is generally stored in a data memory of the drum washing machine.
  • the pressure in a tub is measured.
  • this is one Pressure sensor used, which is also suitable for determining the water level in the tub.
  • the detection of foam is usually activated shortly before spinning or during spinning.
  • the rotation of the drum causes a radially directed release and distribution of foam.
  • a pressure increase is detected, which is measurable at the pressure sensor.
  • the known methods for detecting foam are based on exceeding a threshold (pressure threshold), which is used to register the presence of foam and generally to initiate a foam removal operation.
  • a disadvantage of the known method is that it comes due to the imbalance of laundry and existing residual water that is produced during spinning, by simulating an apparent pressure increase to measurement errors.
  • the occurrence of pressure spikes may indicate the presence of foam, even though there is no foam at all. This is due to variations in pressure measurement with a sensor, with the errors in signal acquisition, conversion or processing also depending on whether a digital or analog controller is used. Since negative values are sometimes not detected by a sensor, the true average value which would result if negative proportions were also detected is not recorded, but an increased pressure of the oscillating water quantity is determined. Moreover, the pressure signals measured by the sensor increase with the rotational speed, so that the pressure threshold value predetermined for the foam detection is prematurely exceeded. In digital controllers, in addition to fluctuations in pressure, pumping effects (water trailing during spinning, "snorkeling”) cause the limit to be reached prematurely and the regulator is triggered to initiate a foam removal operation.
  • the object of the invention is therefore to provide a method by which the resulting foam in a drum washing machine more effectively recognized and thus Can be better controlled than with conventional methods.
  • the present invention thus provides a method for detecting foam in a drum washing machine with a program control for controlling a program sequence, a drum rotatably mounted in a tub, a water supply system, a liquor outlet system arranged on the tub, a drive motor for the drum and a sensor for determining a signal of a liquid contained in the tub and optionally containing foam, wherein the sensor during the rotation of the drum at a high speed U n a signal S n is measured and compared with one of these speed U n stored in the program control associated value W n , wherein value pairs U n and W n (n> 1) are stored in the program control for at least two rotational speeds and the presence of foam is registered when the value W n is reached or exceeded, ie when the condition Sn ⁇ W n is satisfied.
  • the sensor may be a single sensor or a system of multiple sensors.
  • the term sensor preferably also includes a corresponding system for registering and transmitting the data to a program controller in addition to the actual sensor.
  • the sensor is an optical measuring system, a conductometric measuring system, a capacitive measuring system or a pressure measuring system.
  • a pressure measuring system is used, this is preferably also used for the regulation of a water level during a wash and / or rinse cycle.
  • a hydrostatic pressure p and / or a negative time gradient of the hydrostatic pressure (dp / dt), preferably a hydrostatic pressure p, of a liquid-air mixture in the tub is preferably measured as a signal.
  • the signal S n and the associated value W n are pressure values.
  • At least three value pairs U n and W n are stored in the form of a table in the program control.
  • the value pairs U n and W n are stored in the form of a mathematical function in the program control.
  • the speed U n of the drum is in the process according to the invention generally in the range of 100 to 500, preferably in the range of 150 to 400 revolutions per minute.
  • the registration of the presence of foam is acoustically and / or visually displayed.
  • the visual display can be done for example via an LED or LCD display.
  • the display can be made for example by a beep or by a voice message.
  • the value pairs U n , W n depend on the imbalance when rotating the drum and thus generally at least somewhat on the load of laundry. Therefore, value pairs U n , W n are preferably stored in the program storage for one or more predetermined loading quantities with items of laundry.
  • the loading amount can be set or automatically determined by a measure known per se.
  • a hydrostatic pressure p measured with the aid of a sensor can be compared with the amount of water charged.
  • the laundry in the drum absorbs water, which therefore can not contribute to an increase in the hydrostatic pressure.
  • the amount of laundry (load) can be determined. As a result, the foam detection can be performed even more precisely.
  • a foam control measure is initiated. This can be done alternatively or in addition to an optical and / or acoustic indication of the registration of the foaming.
  • the foam can be eliminated by means of adapted rinsing baths with the greatest possible avoidance of the introduction of mechanical energy (for example due to long downtimes of the drum).
  • spinning is generally discontinued for this purpose.
  • a difference between the signal S n measured for a certain speed and the value W n stored for that speed in the program memory is generated with respect to the amount of Evaluated foam.
  • a foam control measure is generally adjusted to the amount of foam produced.
  • the invention also relates to a drum washing machine with a program control for controlling a program sequence, one in one
  • the method and the drum type washing machine of the present invention enable safe foam detection by detecting, for example, unbalanced pressure increases and correcting their effect on foam detection. This allows a particularly efficient implementation of a method for foam removal.
  • the invention makes possible an optimal, automatic adaptation of the foam removal measure to the actual formation of foam.
  • Figure 1 is a schematic representation of the presently relevant parts of a drum washing machine, in which a method for the detection of foam can be performed.
  • Figure 1 is a schematic representation of the presently relevant parts of a drum washing machine, in which a method for the detection of foam can be performed.
  • Figure 1 is a schematic representation of the presently relevant parts of a drum washing machine, in which a method for the detection of foam can be performed.
  • Other embodiments are conceivable.
  • the drum washing machine of the embodiment shown in Figure 1 comprises a tub 1, in which a drum 2 is rotatably mounted and driven by the drive motor 14.
  • the rotational axis 3 of the drum 2 is directed from the horizontal by a small angle (eg 13 °) forwardly upwards, so that the user of the drum washing machine has easier access and insight into the interior of the drum 2.
  • a small angle eg 13 °
  • scooping devices for the wash liquor 6 on the inner surface of the drum shell also also an intensification of the flooding of the laundry. 7 achieved with wash liquor and a reduction of the free liquor, which denotes the amount of wash liquor in the tub 1, which can not be absorbed by the saturated laundry (substantially below the lowest point of the drum 2).
  • the drum washing machine also has a liquor inlet system comprising a water connection fitting for the domestic water network 8, an electrically controllable valve 9 and a supply line 10 to the tub 1, which may optionally also be guided via a Waschstoffein réelleschale 11, from the incoming water detergent portions in the tub 1 can transport.
  • a heater 13 in the tub 1, a heater 13.
  • the valve 9 as well as the heater 13 can be controlled by a control device (“program control") 12 in response to a program flowchart of a time program and / or the achievement of certain measurements of Parameters such as liquor level, liquor temperature, rotational speed of the drum, etc. may be bound within the drum washing machine 15 means a sensor for measuring the hydrostatic pressure or its negative temporal gradient in the tub 1.
  • the drum washing machine comprises a Laugenablaufsystem arranged at the bottom of the tub 1 a drain pump 16 for pumping off the wash liquor.

Abstract

L'invention concerne un procédé de détection de mousse dans une machine à laver à tambour comprenant une commande programmable (12) destinée à commander l'exécution d'un programme, un tambour (2) logé dans une cuve à lessive (1) de manière à pouvoir tourner, un système d'arrivée d'eau (8, 9, 10), un système d'évacuation de la lessive monté sur la cuve à lessive (1), un moteur d'entraînement (14) pour le tambour (2) et un capteur (15) destiné à déterminer un signal d'un liquide qui se trouve dans le récipient à lessive (1) et qui contient éventuellement de la mousse. Selon l'invention, un signal Sn est mesuré par le capteur (15) pendant la rotation du tambour (2) à une vitesse de rotation Un élevée, puis comparé avec une valeur Wn, associée à cette vitesse de rotation Un et enregistrée dans la commande programmable (12), et des paires de valeurs Un et Wn (n>1) sont enregistrées dans la commande programmable (12) pour au moins deux vitesses de rotation et la présence de mousse est consignée lorsque la valeur Wn est atteinte ou dépassée, c'est-à-dire lorsque la condition Sn = Wn est remplie. L'invention concerne également une machine à laver à tambour conçue pour mettre en oevre ce procédé.
PCT/EP2008/061529 2007-09-10 2008-09-02 Procédé de détection de mousse dans une machine à laver à tambour et machine à laver à tambour conçue à cet effet WO2009033980A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007042968.3 2007-09-10
DE102007042968.3A DE102007042968B4 (de) 2007-09-10 2007-09-10 Verfahren zur Erkennung von Schaum in einer Trommelwaschmaschine und hierzu geeignete Trommelwaschmaschine

Publications (1)

Publication Number Publication Date
WO2009033980A1 true WO2009033980A1 (fr) 2009-03-19

Family

ID=40056173

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/061529 WO2009033980A1 (fr) 2007-09-10 2008-09-02 Procédé de détection de mousse dans une machine à laver à tambour et machine à laver à tambour conçue à cet effet

Country Status (2)

Country Link
DE (1) DE102007042968B4 (fr)
WO (1) WO2009033980A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9127392B2 (en) * 2010-10-15 2015-09-08 Whirlpool Corporation Method and apparatus to detect an over-suds condition
WO2013001681A1 (fr) * 2011-06-29 2013-01-03 パナソニック株式会社 Machine à laver à tambour
DE102013216743A1 (de) 2013-08-23 2015-02-26 BSH Bosch und Siemens Hausgeräte GmbH Wäschepflegegerät
DE102015205949A1 (de) 2015-04-01 2016-10-06 BSH Hausgeräte GmbH Verfahren zum Betrieb einer Waschmaschine mit Schaumdetektion durch eine Motorstromauswertung sowie hierzu geeignete Waschmaschine
DE102015205945A1 (de) 2015-04-01 2016-10-06 BSH Hausgeräte GmbH Verfahren zum Betrieb einer Waschmaschine mit Schaumdetektion durch eine Trommeldrehzahlauswertung sowie hierzu geeignete Waschmaschine
EP3318670A1 (fr) 2016-11-08 2018-05-09 BSH Hausgeräte GmbH Procédé de fonctionnement d'une machine à laver avec détection de mousse et lave-linge approprié pour ce procédé
EP3382083A1 (fr) * 2017-03-27 2018-10-03 Vestel Elektronik Sanayi ve Ticaret A.S. Procédé de détermination de mousse dans une machine à laver

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0724036A1 (fr) * 1995-01-25 1996-07-31 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Machine à laver avec dispositif pour diminuer la mousse
DE19549044C1 (de) * 1995-12-28 1997-09-11 Bauknecht Hausgeraete Verfahren zum Waschen von Wäsche in einer Waschmaschine
EP0984092A1 (fr) * 1998-09-02 2000-03-08 Miele & Cie. GmbH & Co. Machine à laver avec dispositif pour déterminer le poids du linge
DE10234472A1 (de) * 2002-07-29 2004-02-12 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Beseitigen von Schaum im Laugenbehälter einer Trommelwaschmaschine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4410329A (en) * 1981-11-06 1983-10-18 General Electric Company Washing machine with oversuds detection and correction capability
DE3638498C2 (de) * 1986-11-11 1994-06-30 Licentia Gmbh Programmgesteuerte Waschmaschine
DE3904222A1 (de) * 1989-02-13 1990-08-16 Lang Apparatebau Gmbh Verfahren und vorrichtung zur programmablaufsteuerung von waschmaschinen
JPH0696069B2 (ja) * 1989-03-28 1994-11-30 三洋電機株式会社 洗濯機
DE4205816C2 (de) * 1992-02-26 1999-08-19 Aeg Hausgeraete Gmbh Programmgesteuerte Waschmaschine
DE19606769B4 (de) * 1996-02-23 2006-05-11 AEG Hausgeräte GmbH Programmgesteuerte Waschmaschine mit einer Einrichtung zur Reduzierung der Schaumbildung
JP3643772B2 (ja) * 2000-12-05 2005-04-27 株式会社東芝 ドラム式洗濯機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0724036A1 (fr) * 1995-01-25 1996-07-31 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Machine à laver avec dispositif pour diminuer la mousse
DE19549044C1 (de) * 1995-12-28 1997-09-11 Bauknecht Hausgeraete Verfahren zum Waschen von Wäsche in einer Waschmaschine
EP0984092A1 (fr) * 1998-09-02 2000-03-08 Miele & Cie. GmbH & Co. Machine à laver avec dispositif pour déterminer le poids du linge
DE10234472A1 (de) * 2002-07-29 2004-02-12 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Beseitigen von Schaum im Laugenbehälter einer Trommelwaschmaschine

Also Published As

Publication number Publication date
DE102007042968B4 (de) 2021-05-12
DE102007042968A1 (de) 2009-03-12

Similar Documents

Publication Publication Date Title
EP2185763B1 (fr) Procédé d'élimination de mousse dans une machine à laver à tambour et machine à laver à tambour correspondante
WO2009033980A1 (fr) Procédé de détection de mousse dans une machine à laver à tambour et machine à laver à tambour conçue à cet effet
EP1861537B1 (fr) Processus de mouillage du linge dans un lave-linge commande par programme, et lave-linge
EP2010706B1 (fr) Procédé pour éliminer la mousse dans une machine à laver à tambour et machine à laver à tambour appropriée à cet effet
EP2171147B1 (fr) Procede de regulation de la production de mousse dans un lave-linge, et lave-linge a cet effet
EP3268529B1 (fr) Procédé pour faire fonctionner un lave-linge avec un capteur électrochimique et lave-linge pour la mise en oeuvre dudit procédé
WO2016156069A1 (fr) Procédé pour faire fonctionner un lave-linge avec détection de mousse par une interprétation du courant du moteur ainsi que lave-linge adapté à cet effet
WO2016146321A1 (fr) Procédé pour faire fonctionner un lave-linge comprenant un capteur d'impédance et lave-linge pour la mise en oeuvre de ce procédé
DE102007041069B4 (de) Verfahren zur Erkennung von Weichspüler in einer Waschmaschine sowie hierzu geeignete programmgesteuerte Waschmaschine
DE102016204347A1 (de) Verfahren zum Betrieb eines wasserführenden Haushaltsgeräts mit verbessertem Pumpbetrieb
WO2016156068A1 (fr) Procédé permettant de faire fonctionner un lave-linge à détection de mousse par évaluation de la vitesse de rotation d'un tambour et lave-linge adapté à ce procédé
EP2408958B1 (fr) Procédé pour optimiser une phase de rinçage d'une machine à laver, ainsi que machine à laver convenant à ce procédé
DE102010028141B4 (de) Verfahren zur Behandlung von Wäsche in einer Trommelwaschmaschine unter verbesserten Schöpfbedingungen
EP3191637B1 (fr) Procédé permettant de faire fonctionner un lave-linge comprenant un capteur de pression et lave-linge adapté audit procédé
DE102015204538A1 (de) Waschmaschine mit elektrochemischer Wasserhärtebestimmung sowie Verfahren zu ihrem Betrieb
DE102009002622B4 (de) Verfahren zur Durchführung einer Spülphase in einer Trommelwaschmaschine
EP3134570B1 (fr) Procédé de traitement hybride et de lavage d'articles de linge et lave-linge adapté à ce procédé
DE102008054837B4 (de) Verfahren zur Behandlung von Wäsche
DE102009002845A1 (de) Verfahren zur Erkennung eines unzulässigen Betriebszustandes in einer Waschmaschine unter Ausnutzung eines drehrichtungsabhänigen Druckverhaltens

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08803504

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08803504

Country of ref document: EP

Kind code of ref document: A1