EP2379787B1 - Procédé de détermination d'un balourd statique et d'un balourd dynamique, dispositif correspondant et appareil électroménager doté d'un tel dispositif - Google Patents

Procédé de détermination d'un balourd statique et d'un balourd dynamique, dispositif correspondant et appareil électroménager doté d'un tel dispositif Download PDF

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Publication number
EP2379787B1
EP2379787B1 EP09799334A EP09799334A EP2379787B1 EP 2379787 B1 EP2379787 B1 EP 2379787B1 EP 09799334 A EP09799334 A EP 09799334A EP 09799334 A EP09799334 A EP 09799334A EP 2379787 B1 EP2379787 B1 EP 2379787B1
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EP
European Patent Office
Prior art keywords
imbalance
dynamic
amplitude
static
drum
Prior art date
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EP09799334A
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German (de)
English (en)
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EP2379787A1 (fr
Inventor
Peter Blauert
Steffen Udluft
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
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BSH Bosch und Siemens Hausgeraete GmbH
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Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Priority to PL09799334T priority Critical patent/PL2379787T3/pl
Publication of EP2379787A1 publication Critical patent/EP2379787A1/fr
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Publication of EP2379787B1 publication Critical patent/EP2379787B1/fr
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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
    • D06F34/16—Imbalance
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/48—Preventing or reducing imbalance or noise
    • 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
    • D06F2103/26—Imbalance; Noise level

Definitions

  • the present invention relates to a method for determining an imbalance occurring in a drum of a domestic appliance for the care of laundry items, caused by a distribution of the laundry items in an interior of the drum, in which a static and a dynamic imbalance are determined. Moreover, the present invention relates to a corresponding device and household appliance with such a device accordingly established.
  • dewatering of washed items of laundry usually takes place mechanically in a so-called spin mode.
  • the drum rotates at a relatively high speed, for example, at a speed of about 1,200 rpm, so that the laundry is tight against an inner wall of the drum. If the items of laundry are distributed unevenly, there is an imbalance and the drum and mechanically connected to the drum parts of the washing machine, such as a tub, begin to oscillate. These vibrations can become particularly strong in resonance areas of the washing machine, so that the drum can not be raised to a desired speed, resulting in unsatisfactory spin or wash results.
  • the document discloses DE 196 16 985 A1 a method for balancing an imbalance occurring in a spinning operation in a drum of a washing machine.
  • a leveling liquid is introduced into drum-side in-plane cavities, wherein the mass of the imbalance and beyond an axial position of the imbalance within the drum is determined.
  • the imbalance compensation is carried out depending on the mass and the axial position of the imbalance.
  • a plurality of separate means are provided, by means of which the mass of the imbalance and beyond the axial position of the imbalance can be determined.
  • a method for determining a dynamic imbalance of a washing machine is out EP 1 167 609 A1 known.
  • the disclosed method with a plurality of uniaxial acceleration sensor or a multiaxial acceleration sensor, imbalance-induced movement of the washing machine's tub is determined.
  • the disadvantage of this method is that the cost-intensive provision of several such sensors.
  • the object of the present invention is to provide a method and a device or domestic appliance, in which a determination of the dynamic imbalance, in particular when using a single sensor, is ensured with little effort.
  • At least one dynamic imbalance is determined.
  • a basic idea is that in each case a value of an amplitude of a movement behavior of a liquor container arranged in the domestic appliance is determined at at least two different rotational speeds of the drum, and that the dynamic unbalance is determined as a function of the at least two values of the amplitude.
  • a static imbalance can advantageously also be determined at the same time as a function of a value of the ascertained amplitudes.
  • both the static and dynamic imbalance can be determined with a simple sensor, in particular a uniaxial displacement sensor.
  • the term household appliance is understood here in particular a washing machine, a dryer or a washer-dryer.
  • an essential idea of the present invention is that for determining the dynamic and possibly the static unbalance a measured variable is considered which characterizes a movement behavior of a tub, wherein at least two different values of a speed of the drum each have a value of an amplitude of Measured variable is determined. Depending on the at least two values of the amplitude, the dynamic and possibly also the static unbalance are then determined.
  • a value of an average amplitude of the measured variable is determined over at least half a period of a course of the measured variable, and depending on the at least two values average amplitude, the static and the dynamic imbalance are determined.
  • a distance between the envelopes of the course of the measured variable can preferably be used.
  • a vibration behavior of a vibration system of the domestic appliance having the drum and the tub can be determined.
  • a transition into a centrifugal operation can be influenced.
  • a cancellation of the spinning operation or a lowering of the speed can be made.
  • a displacement signal characterizing a deflection of the tub from a rest position and / or a speed and / or an acceleration of the tub are selected as the measured variable.
  • a displacement sensor in the household appliance preferably in a damper of the tub, is arranged, which is designed to generate the displacement signal characterizing the deflection of the tub from the rest position.
  • an acceleration sensor it is also possible to use an acceleration sensor and to select a signal representing an acceleration of the movement of the tub as the measured variable. By integrating the acceleration signal, a speed of movement of the tub can be obtained. Therefore, instead of a displacement sensor and sensors for detecting the acceleration and / or the speed of the tub can be used.
  • An imbalance in the rotating drum of the tub forces a vibration of the tub.
  • the amplitude of such a forced oscillation depends on device-specific parameters and the rotational speed of the drum (exciter frequency).
  • For each degree of freedom of vibration own device-specific parameters apply. Since the oscillatory tub can now move freely in six degrees of freedom, determined by means of an amplitude of the signal, in particular the path signal of the tub, static unbalance for one degree of freedom only in the first approximation, because a certain proportion of the amplitude in this degree of freedom the vibration in a further degree of freedom or is dependent on a dynamic imbalance. Because each degree of freedom of movement of the tub has different resonance frequencies, the static imbalance is over- or underestimated depending on the speed.
  • the dynamic imbalance can be determined and thus the static imbalance can be specified. From the comparison, a variable dependent on the dynamic imbalance or the dynamic imbalance can be determined directly.
  • a mathematical formula in which the values of the amplitude of the signal or the unbalance at the at least two different rotational speeds are related to one another is also understood as such a comparison.
  • a system of equations having at least two equations is formed, wherein the static and the dynamic unbalance are determined on the basis of the system of equations. It can be provided that a linear system of equations is selected as the equation system.
  • unbalance (1st approximation) (A * imbalance static + B * unbalance dynamic).
  • an increase and / or decrease of the rotational speed is carried out as a function of the dynamic imbalance.
  • an adaptation of an end speed that is to say a speed during the spin operation, can be carried out so that loads determined from the static and the dynamic unbalance can not exceed a permissible limit value. If the at least two values of the rotational speed are selected such that the at least two values lie below a resonance rotational speed, then a transition to the centrifugal operation can be omitted if the determined dynamic imbalance shows that the tumbling movements of the drum become too great. Such a so-called disaster detection can also be due to the static unbalance.
  • a device is designed for determining an unbalance occurring in a drum of a domestic appliance for the care of laundry items, caused by a distribution of the laundry items in an interior of the drum.
  • the device comprises an unbalance determination device, which is designed to determine a dynamic imbalance.
  • the unbalance determination device is designed to determine in each case a value of an amplitude of a movement characterizing a movement of a liquor container arranged in the domestic appliance at at least two different rotational speeds of the drum, and depending on the at least two values of the amplitude, the dynamic unbalance to investigate.
  • the unbalance determination device is advantageously designed to additionally determine a static imbalance in dependence on a value of the amplitudes.
  • a washing machine which has in a housing 1 a spring 9 suspended from the tub 3 with a rotatably mounted drum 8 therein.
  • a balance weight 11 is attached at the tub 3.
  • the drum is driven by a motor 5 via a belt 4.
  • a damper 6 of the tub 3 a not shown displacement sensor is arranged in the present example, which is able to detect a deflection of the tub 3 from a rest position, and to generate a signal characterizing this deflection.
  • this signal is referred to as a path signal.
  • the invention also includes alternative arrangements of the sensor, if such a sensor can detect a movement of the tub 3 with respect to the housing 1.
  • the household appliance comprises a controller 10 which is electrically connected to electrical consumers, such as the motor 5, and measuring devices, such as the displacement sensor.
  • the controller 10 is designed such that the control signals required for operating the household appliance are generated and that, with means included by the controller, the signals detected by the measuring appliances can be evaluated.
  • a controller 10 may itself comprise or be connected to such an apparatus for determining an imbalance occurring in a drum of a domestic appliance for the care of laundry items caused by a distribution of the laundry items in an interior of the drum.
  • the controller 10 can generate control signals that affect the further program flow, in particular the spin operation with respect to the control and / or regulation of the rotational speed of the drum 8.
  • Reduction of a drum speed when exceeding a predetermined unbalance limit for the determined dynamic and / or static imbalance possible to avoid excessive movements of the tub 3 and excessive mechanical stress.
  • a respective value of an amplitude of the path signal W of the deflection of the tub is determined in the present case at two different speeds n 1 and n 2 of the drum.
  • each value of the amplitude of the path signal W corresponds to a specific value of the imbalance, wherein this imbalance coincides only in a first approximation with the static imbalance. This is accomplished by allowing the tub 3 to generally move freely in six different degrees of freedom (x, y, z and rotation about x, y, z). That is, a detected path signal W is caused by the movement of the tub 3 in multiple degrees of freedom.
  • the excitation of the tub 3 in a degree of freedom at the same time cause a movement of the tub 3 in a further degree of freedom.
  • typical amplitude curves are formed for the oscillation of the tub 3, depending on the type and magnitude of the excitation via the rotational speed n of the drum 8, ie the excitation frequency.
  • the amplitude of a measured variable, in the present example of the path signal W is determined at at least two different rotational speeds n 1 and n 2 .
  • the dynamic imbalance can be determined in the present case and thus the static imbalance can be specified.
  • Fig. 1 gives a curve f1 a speed n as a function of time t and a curve f2 of a path signal W as a function of time t again.
  • an unbalance-causing load in an axial center of the drum 8 is arranged.
  • a course f3 of the rotational speed n and a course f4 of the travel signal W as a function of the time t it being mentioned that the unbalance-causing load is now arranged on an axial rear edge of the drum 8.
  • a ratio V of a vibration amplitude of the path signal W at a rotational speed n 1 of, for example 235 U / min to a vibration amplitude of the path signal W at a further speed n 2 for example, 300 U / min depending on the arrangement of the load or imbalance in the drum.
  • the ratio V is thus significantly different in the case of the arrangement of the imbalance at the axial rear edge of the drum than in the case of the arrangement of the imbalance in the axial center of the drum.
  • the ratio V can also be determined by means of a difference quotient.
  • Such a ratio V or a change in the oscillation amplitude can also be determined analogously for other ranges of the rotational speed n and / or taking into account a multiplicity of ranges of the rotational speed n
  • the oscillation amplitudes W are determined at a number of different rotational speeds n of the drum 8, the number greater than or equal to the number of degrees of freedom of the imbalance to be determined.
  • Fig. 3 gives an example course of an amplitude A of the path signal W as a function of the rotational speed n again.
  • the amplitude A represents an average amplitude over at least half a period of the path signal W, wherein a distance between the envelope of the path signal W is considered for calculating the average amplitude.
  • the amplitude A represents a measure of the static unbalance (1st approximation).
  • U 1 denotes. Approximation of the unbalance obtained from the amplitude A, where U static and U dynamic represents the static or dynamic imbalance to be determined.
  • a and B denote device-specific constants, which are set speed-specifically for the selected values of the rotational speed n. If the amplitude A or the unbalance (first approximation) is determined at two different rotational speeds n, then the dynamic and the static unbalance can be determined from a system of equations having two equations.

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

Claims (10)

  1. Procédé de détermination d'un défaut d'équilibrage (U) se manifestant dans un tambour d'un appareil ménager destiné à l'entretien de pièces de linge et causé par une répartition des pièces de linge dans un espace intérieur du tambour, dans lequel au moins un défaut d'équilibrage dynamique (Udynamisch) est déterminé, caractérisé en ce qu'une valeur d'une amplitude (A) d'une grandeur de mesure (W) caractérisant un comportement de mouvement d'un réservoir de liquide de lavage disposé dans l'appareil ménager est respectivement déterminée en cas d'au moins deux valeurs différentes d'une vitesse de rotation (n) du tambour, et en ce qu'en fonction des au moins deux valeurs de l'amplitude (A), le défaut d'équilibrage dynamique (Udynamisch) est déterminé par comparaison des valeurs de l'amplitude (A) en cas des au moins deux vitesses de rotation différentes.
  2. Procédé selon la revendication 1, caractérisé en ce qu'un défaut d'équilibrage statique (Ustatisch) est déterminé en fonction d'au moins une valeur des amplitudes (A).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'un signal de parcours (W) caractérisant une déviation du réservoir de liquide de lessive par rapport à une position de repos et/ou une vitesse et/ou une accélération du réservoir de liquide de lessive est/sont sélectionné(s) en tant que grandeur de mesure.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'un système d'équations présentant au moins deux équations est formé, et en ce que le défaut d'équilibrage statique et le défaut d'équilibrage dynamique (Ustatisch, Udynamisch) sont déterminés sur la base du système d'équations.
  5. Procédé selon la revendication 4, caractérisé en ce qu'un système d'équations linéaire est sélectionné en tant que système d'équations.
  6. Procédé selon la revendication 4 ou 5, caractérisé en ce qu'au moins deux constantes (A, B) du système d'équations sont déterminées de manière spécifique quant à la vitesse de rotation pour les au moins deux valeurs sélectionnées de la vitesse de rotation (n).
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une augmentation et/ou une baisse de la vitesse de rotation (n) sont réalisées en fonction du défaut d'équilibrage dynamique (Udynamisch).
  8. Dispositif de détermination d'un défaut d'équilibrage (U) se manifestant dans un tambour d'un appareil ménager destiné à l'entretien de pièces de linge et causé par une répartition des pièces de linge dans un espace intérieur du tambour, comprenant un agencement de détermination de défaut d'équilibrage lequel est réalisé pour déterminer un défaut d'équilibrage dynamique (Ustatisch, Udynamisch), caractérisé en ce que l'agencement de détermination de défaut d'équilibrage est réalisé pour déterminer respectivement une valeur d'une amplitude (A) d'une grandeur de mesure (W) caractérisant un mouvement d'un réservoir de liquide de lavage disposé dans l'appareil ménager pour au moins deux valeurs différentes d'une vitesse de rotation (n) du tambour, et, en fonction des au moins deux valeurs de l'amplitude (A), pour déterminer le défaut d'équilibrage dynamique (Udynamisch) par comparaison des valeurs de l'amplitude (A) aux au moins deux vitesses de rotation différentes.
  9. Dispositif selon la revendication 8, caractérisé en ce que l'agencement de détermination de défaut d'équilibrage est en outre réalisé pour déterminer un défaut d'équilibrage statique (Ustatisch) en fonction d'au moins une valeur des amplitudes (A).
  10. Appareil ménager, notamment lave-linge et/ou sèche-linge, pour la réalisation d'un procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'un dispositif selon l'une quelconque des revendications 8 ou 9 est compris.
EP09799334A 2008-12-22 2009-12-17 Procédé de détermination d'un balourd statique et d'un balourd dynamique, dispositif correspondant et appareil électroménager doté d'un tel dispositif Active EP2379787B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09799334T PL2379787T3 (pl) 2008-12-22 2009-12-17 Sposób wyznaczania statycznego i dynamicznego niewyważenia, odpowiednie urządzenie i sprzęt gospodarstwa domowego z takim urządzeniem

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008055090A DE102008055090A1 (de) 2008-12-22 2008-12-22 Verfahren zum Ermitteln einer statischen und einer dynamischen Unwucht, entsprechende Vorrichtung und Haushaltsgerät mit einer solchen Vorrichtung
PCT/EP2009/067423 WO2010072648A1 (fr) 2008-12-22 2009-12-17 Procédé de détermination d'un balourd statique et d'un balourd dynamique, dispositif correspondant et appareil électroménager doté d'un tel dispositif

Publications (2)

Publication Number Publication Date
EP2379787A1 EP2379787A1 (fr) 2011-10-26
EP2379787B1 true EP2379787B1 (fr) 2012-10-03

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EP09799334A Active EP2379787B1 (fr) 2008-12-22 2009-12-17 Procédé de détermination d'un balourd statique et d'un balourd dynamique, dispositif correspondant et appareil électroménager doté d'un tel dispositif

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EP (1) EP2379787B1 (fr)
DE (1) DE102008055090A1 (fr)
PL (1) PL2379787T3 (fr)
WO (1) WO2010072648A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014001676B4 (de) * 2014-02-07 2022-03-03 Diehl Ako Stiftung & Co. Kg Wäschebehandlungsgerät mit Unwuchterfassungseinrichtung und Verfahren zum Erkennen einer Unwucht in einem Wäschebehandlungsgerät

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19616985A1 (de) 1996-04-27 1997-10-30 Aeg Hausgeraete Gmbh Verfahren zum Unwuchtausgleich
DE19748366C2 (de) * 1997-11-03 2003-08-21 Aeg Hausgeraete Gmbh Verfahren zur Wäscheunwucht-Messung bei Waschmaschinen
DE60013791T3 (de) 2000-06-30 2008-01-24 Whirlpool Corp., Benton Harbor Verfahren zur Detektion und zur Kontrolle einer dynamischen Unwucht in der Trommel einer Waschmaschine und Waschmaschine zur Durchführung dieses Verfahrens
DE102004043752B4 (de) * 2004-09-10 2007-12-06 Schaeffler Kg Messvorrichtung mit einer optischen Sensorik und ein Verfahren mit der Messvorrichtung
US7581272B2 (en) * 2006-05-19 2009-09-01 Whirlpool Corporation Dynamic load detection for a clothes washer
DE102006032337A1 (de) * 2006-07-12 2008-01-17 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zur Steuerung eines Schleuderablaufes einer Waschmaschine und zur Durchführung des Verfahrens geeignete Waschmaschine
EP2050856B1 (fr) * 2007-10-18 2016-03-30 Electrolux Home Products Corporation N.V. Lave-linge doté d'un dispositif électronique pour capter le mouvement de l'ensemble lavant suite au déséquilibre dynamique de l'ensemble tambour de lavage du linge et procédé de fonctionnement correspondant

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Publication number Publication date
PL2379787T3 (pl) 2013-03-29
WO2010072648A1 (fr) 2010-07-01
DE102008055090A1 (de) 2010-06-24
EP2379787A1 (fr) 2011-10-26

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