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WO2013079379A1 - Lave-linge domestique et procédé de détermination de la charge de linge dans le tambour d'un lave-linge domestique - Google Patents

Lave-linge domestique et procédé de détermination de la charge de linge dans le tambour d'un lave-linge domestique Download PDF

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Publication number
WO2013079379A1
WO2013079379A1 PCT/EP2012/073228 EP2012073228W WO2013079379A1 WO 2013079379 A1 WO2013079379 A1 WO 2013079379A1 EP 2012073228 W EP2012073228 W EP 2012073228W WO 2013079379 A1 WO2013079379 A1 WO 2013079379A1
Authority
WO
WIPO (PCT)
Prior art keywords
frequency spectrum
laundry
washing machine
laundry drum
drive motor
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.)
Ceased
Application number
PCT/EP2012/073228
Other languages
German (de)
English (en)
Inventor
Hasan Gökcer ALBAYRAK
Jörg SKRIPPEK
Sven Vogel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete 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 Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Priority to EP12794253.0A priority Critical patent/EP2785906A1/fr
Publication of WO2013079379A1 publication Critical patent/WO2013079379A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • D06F34/18—Condition of the laundry, e.g. nature or weight

Definitions

  • the invention relates to a method for determining the loading amount of laundry in the laundry drum of a household washing machine with an electronic control device and an electronically controllable drive motor for the laundry drum, which is rotatably mounted in an oscillating unit about an at least approximately horizontal axis and at the mechanical vibrations are introduced with a predetermined frequency spectrum in the oscillating unit (1 1). Furthermore, the invention relates to a household washing machine, which is set up to carry out the method.
  • EP 649 930 B1 teaches that during the drum start-up phase for operating the drum at a controlled treatment speed at which the (dry) wash is not held by centrifugal force on the drum shell, the drive torque to the drum drive motor is determined.
  • a measure is required in the program before the actual treatment process, on the one hand takes a certain amount of time and on the other hand is not understood by the user of the washing machine in their benefits.
  • this method is very imprecise due to imponderable compositions of different laundry items, because the behavior of the drive torque u. a. also depends on the denomination of the laundry item and the specific weight of individual parts.
  • From DE 197 10 713 A1 discloses a method for determining the degree of filling of introduced in a laundry drum of a washing machine laundry is known.
  • sound waves that is to say vibrations of the air
  • the detector device is provided with an analyzer which determines the intensity and the frequency of the received signals.
  • An evaluation circuit connected to the analyzer determines from the signals the degree of filling of the laundry drum.
  • a disadvantage of this method is that only the introduced primary vibrations, which are reflected from the free surface, can be detected, which is why only the degree of filling can be determined.
  • the degree of filling of a laundry drum depends on many parameters such as the type of laundry, packing density, etc. Therefore, the degree of filling does not essentially correlate with the loading amount or the loading mass. Somir can be closed with this method only very inaccurate on the load.
  • additional devices in particular a sound wave generation unit, are required, which increases the manufacturing costs of a washing machine.
  • the invention has for its object to provide a method for determining the mass of preferably dry laundry items, which is as independent as possible of uncertainties of their parameters to be detected in order to increase the accuracy of the load. Furthermore, this method should be provided inexpensively.
  • such a measure consist in that the drive motor is cyclically cyclically rotated by an amount in the positive direction and then by the same amount in the negative direction.
  • the drive motor emits mechanical vibrations, in particular in the form of structure-borne noise, which contain a constant frequency spectrum without the need for an additional unit. The same amount is easy to generate; whereas different amounts for both directions of rotation lead to success.
  • the speed at which the change in the directions of rotation takes place can be in the lower range of the human audible frequency spectrum.
  • a thus audible acoustic annoyance can thus be kept in a safe manageable minimum.
  • suitable measures and means for generating vibration and for detecting the secondary vibrations portions of the frequency spectrum or even the entire spectrum of people may contain imperceptible frequencies.
  • the secondary frequency spectrum is compared with a catalog of frequency spectra and associated load amounts. In this way, the differentiation of the assignment of the current amount of laundry to typical secondary vibrations is the easiest to and can be taken in any accuracy if the memory for the catalog has a sufficiently large capacity.
  • Such a measure is to be represented in a simple manner by a further development of the method according to the invention by the frequency spectrum is decomposed into a series of energy peaks at certain frequency locations whose amplitudes are compared with the values stored in the catalog for these frequency locations.
  • the drive motor is fixed at a position of the oscillating unit, which is suitable for good transmission of structure-borne noise from the drive motor to the oscillating system.
  • the oscillating unit has a component which comes as a membrane for the secondary vibrations in question. Then, namely, the transmission to a suitable sensor can take place most effectively, and the signal to noise ratio is sufficiently large.
  • An acceleration sensor is attached to the component as a sensor for detecting such secondary oscillations on the oscillating unit.
  • Acceleration sensors are common components for household washing machines, which are already being used for tasks similar to the detection of laundry imbalances. An existing acceleration sensor can therefore be used additionally for the new task. Acceleration sensors are also ideal for detecting structure-borne noise.
  • FIG. 1 is a schematic representation of a detail of a household washing machine with a control device for a drive motor of the BLCD type, which can transmit its mechanical vibrations to a sensor,
  • FIG. 2 shows a typical secondary frequency spectrum of a vibrating aggregate containing an empty laundry drum.
  • FIG. Fig. 3 is a secondary frequency spectrum of the same oscillating aggregate, the laundry drum is loaded with a 5 kg laundry items, and
  • Fig. 4 is a secondary frequency spectrum of FIG. 3, with a 2 kg heavy
  • the schematically illustrated BLDC motor 1 in Fig. 1 includes a stator 2, in which the windings U, V and W are fixedly connected to the housing 3. Their magnetic fields act on a rotor 4, which consists of a suitable permanent magnet and is freely rotatably mounted in the housing 3 by means of the shaft 5. To control the direction of rotation and the speed of the shaft 5, a BLDC controller 6 is used, which cooperates with a switch array 7, whose switch supplies the windings U, V and W in an order and intensity required for the desired direction of rotation and speed ,
  • the shaft 5 serves to drive a laundry drum 9, which is rotatably mounted in a tub 8, of a washing machine, not otherwise shown.
  • the engine 1 is attached via a component 10 to the tub 8.
  • Laundry drum 9 and tub 8 are here as well as the drive motor 1 and an unillustrated transmission between the drive motor 1 and the laundry drum 9 to the oscillating unit 1 1.
  • the vibrations of the oscillating unit 1 1 during the rotation of the laundry drum 9 are detected by an acceleration sensor 12 , which passes its signals via the line 13 to a frequency analyzer 14, which signals signals on the analyzed frequencies both to an analog-to-digital converter 15 and to a controller 16.
  • the signals resulting from imbalances of the laundry drum 9 go directly to the control device 16, while the frequency spectrum of higher-frequency signals of the acceleration sensor 12 in the analog-to-digital converter 15 are converted into data sets in a memory 17 shown in the controller 16 there stored records of a catalog, which are assigned to respective load quantities of laundry items.
  • the higher-frequency signals are mainly caused by the propagating in the unit 1 1 structure-borne sound. Such higher-frequency signals are generated in the following manner.
  • the vibrations generated by the drive motor 1 impinge on the empty laundry drum 9, which due to its typical vibration mechanical properties obtains a certain damping to the predetermined, in particular constant, frequency spectrum of the vibrations generated.
  • This attenuation absorbs the generated vibrations to a greater or lesser extent at some or most of the frequency spectrum so that a secondary frequency spectrum shaped by the attenuation of the empty laundry drum 9 is reflected as shown in FIG.
  • the frequency spectrum according to FIG. 4 is intended to characterize a laundry drum 9 loaded with 2 kg of laundry and shows - also in comparison to those of FIGS. 2 and 3 - no easily recognizable regularity in the deviations of the attenuations of the reflections.
  • the reflection u1 at the frequency location F1 as in FIG. 3 has an attenuation of almost 70%, while the reflection u4 at the adjacent frequency location F2 is only attenuated by approximately 57%.
  • this reflection u2 had the same attenuation as on the previous frequency location F1, namely also about 70%.
  • T. discover serious deviations that have found their expression in the catalog of the memory 17 and find the assignment to the load quantity "2 kg".
  • the specific frequency spectrums of the respective assigned amounts of laundry are always constant, so neither influenced by unwargetable compositions of different laundry items, the denomination of the Wäschepostens, the specific weight of individual parts of not so constant as desired offset constants is with the inventive method to achieve a significant advance in the accuracy of automatically determined amount of laundry in a washing machine.
  • other methods for generating and introducing mechanical vibrations with a predetermined, in particular constant, frequency spectrum in the oscillating unit of a washing machine are possible and usable if a vibration source other than the drive motor is available or can be created with little effort ,

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

L'invention concerne un procédé de détermination de la charge de linge dans le tambour 9 d'un lave-linge domestique au moyen d'un dispositif de commande électronique 16 et un moteur d'entraînement à commande électronique 1 pour le tambour 9, afin d'améliorer la précision de la détermination. Selon l'invention, une mesure consiste, éventuellement sur le moteur d'entraînement 1, à générer des vibrations mécaniques selon un spectre de fréquences prédéterminé, en particulier constant, lesquelles sont transmises au groupe oscillant 11 dans lequel le tambour 9 est supporté en rotation. On enregistre en outre le spectre de fréquences des vibrations secondaires suscitées dans le groupe oscillant 11, lequel spectre est identifié par l'absorption, et on y associe une charge typique du tambour 9.
PCT/EP2012/073228 2011-11-29 2012-11-21 Lave-linge domestique et procédé de détermination de la charge de linge dans le tambour d'un lave-linge domestique Ceased WO2013079379A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12794253.0A EP2785906A1 (fr) 2011-11-29 2012-11-21 Lave-linge domestique et procédé de détermination de la charge de linge dans le tambour d'un lave-linge domestique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011087365.1 2011-11-29
DE102011087365A DE102011087365A1 (de) 2011-11-29 2011-11-29 Verfahren und Einrichtung zum Bestimmen der Beladungsmenge von Wäsche in der Wäschetrommel einer Haushaltwaschmaschine

Publications (1)

Publication Number Publication Date
WO2013079379A1 true WO2013079379A1 (fr) 2013-06-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/073228 Ceased WO2013079379A1 (fr) 2011-11-29 2012-11-21 Lave-linge domestique et procédé de détermination de la charge de linge dans le tambour d'un lave-linge domestique

Country Status (3)

Country Link
EP (1) EP2785906A1 (fr)
DE (1) DE102011087365A1 (fr)
WO (1) WO2013079379A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018210990A1 (de) 2018-07-04 2020-01-09 BSH Hausgeräte GmbH Verfahren zum Bestimmen einer Masse von Wäschestücken in einem Haushaltsgerät zur Pflege von Wäschestücken durch eine nicht-kontinuierliche Bewegung der Wäschetrommel, Messvorrichtung sowie Haushaltsgerät

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19710713A1 (de) 1997-02-06 1998-08-13 Fraunhofer Ges Forschung Vorrichtung zur Bestimmung des Füllungsgrades einer in einer Trommelhausung rotierbar gelagerten Waschmaschinentrommel mit Wäsche
EP0649930B1 (fr) 1993-10-25 1999-03-10 BSH Bosch und Siemens Hausgeräte GmbH Procédé pour déterminer la quantité de linge dans une machine de traitement de linge
WO2008012206A1 (fr) 2006-07-24 2008-01-31 BSH Bosch und Siemens Hausgeräte GmbH Procédé pour déterminer une quantité de charge d'un appareil de traitement du linge et appareil de traitement du linge adapté
WO2010000861A1 (fr) * 2008-07-04 2010-01-07 Ident Technology Ag Dispositif capteur capacitif

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1311711B1 (it) * 1999-09-23 2002-03-19 Electrolux Zanussi Elettrodome Macchina lavatrice provvista di mezzi di regolazionee controllo
EP1113102B1 (fr) * 1999-12-28 2003-07-09 Whirlpool Corporation Procédé pour déterminer l'inertie totale et le balourd dans le tambour d'une machine à laver le linge
DE102005037144B4 (de) * 2005-02-18 2007-04-19 Diehl Ako Stiftung & Co. Kg Schwingfähig aufgehängtes Innenaggregat einer Wäschebehandlungsmaschine mit einem Schwingungssensor
PL2148430T3 (pl) * 2008-07-21 2014-08-29 Whirlpool Co Sposób wyznaczania całkowitej bezwładności i niewyważonego ładunku w bębnie pralki
US8631527B2 (en) * 2009-08-10 2014-01-21 Whirlpool Corporation Laundry treating appliance with tumble pattern control

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0649930B1 (fr) 1993-10-25 1999-03-10 BSH Bosch und Siemens Hausgeräte GmbH Procédé pour déterminer la quantité de linge dans une machine de traitement de linge
DE19710713A1 (de) 1997-02-06 1998-08-13 Fraunhofer Ges Forschung Vorrichtung zur Bestimmung des Füllungsgrades einer in einer Trommelhausung rotierbar gelagerten Waschmaschinentrommel mit Wäsche
WO2008012206A1 (fr) 2006-07-24 2008-01-31 BSH Bosch und Siemens Hausgeräte GmbH Procédé pour déterminer une quantité de charge d'un appareil de traitement du linge et appareil de traitement du linge adapté
WO2010000861A1 (fr) * 2008-07-04 2010-01-07 Ident Technology Ag Dispositif capteur capacitif

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018210990A1 (de) 2018-07-04 2020-01-09 BSH Hausgeräte GmbH Verfahren zum Bestimmen einer Masse von Wäschestücken in einem Haushaltsgerät zur Pflege von Wäschestücken durch eine nicht-kontinuierliche Bewegung der Wäschetrommel, Messvorrichtung sowie Haushaltsgerät

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Publication number Publication date
DE102011087365A1 (de) 2013-05-29
EP2785906A1 (fr) 2014-10-08

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