EP2460921A2 - Dispositif de traitement de linge et procédé de commande du fonctionnement d'un dispositif de traitement de linge - Google Patents

Dispositif de traitement de linge et procédé de commande du fonctionnement d'un dispositif de traitement de linge Download PDF

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Publication number
EP2460921A2
EP2460921A2 EP11009353A EP11009353A EP2460921A2 EP 2460921 A2 EP2460921 A2 EP 2460921A2 EP 11009353 A EP11009353 A EP 11009353A EP 11009353 A EP11009353 A EP 11009353A EP 2460921 A2 EP2460921 A2 EP 2460921A2
Authority
EP
European Patent Office
Prior art keywords
speed
drum
imbalance
fluctuation
dependent variable
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.)
Granted
Application number
EP11009353A
Other languages
German (de)
English (en)
Other versions
EP2460921B1 (fr
EP2460921A3 (fr
Inventor
Stefan Zeh
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.)
Diehl AKO Stiftung and Co KG
Original Assignee
Diehl AKO Stiftung and Co KG
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 Diehl AKO Stiftung and Co KG filed Critical Diehl AKO Stiftung and Co KG
Priority to PL11009353T priority Critical patent/PL2460921T3/pl
Publication of EP2460921A2 publication Critical patent/EP2460921A2/fr
Publication of EP2460921A3 publication Critical patent/EP2460921A3/fr
Application granted granted Critical
Publication of EP2460921B1 publication Critical patent/EP2460921B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal axis
    • D06F37/225—Damping vibrations by displacing, supplying or ejecting a material, e.g. liquid, into or from counterbalancing pockets
    • 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
    • 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

Definitions

  • the present invention relates to a method for controlling the operation of a laundry treating apparatus and a laundry treating apparatus, the operation of which can be controlled by this method.
  • a laundry treatment device is a washing machine, a tumble dryer and a combined washer-dryer.
  • a laundry treating apparatus comprises a rotatably arranged drum for receiving, e.g. to be washed and / or laundry to be dried.
  • the drum When spinning wet laundry in the laundry treatment devices, the drum is accelerated to a speed above a so-called application speed at which the force acting on the laundry centrifugal force is greater than gravity and the laundry therefore more or less uniformly applied to the drum shell.
  • This application speed is typically in the range of about 100 rpm in laundry treatment devices.
  • Uneven distribution of the laundry results in imbalances which generate vibrations which in turn cause load on bearings, impact of the drum receiving tub against the machine housing and noise can.
  • Such problems occur particularly in laundry treatment devices whose drums have a rotation axis with a horizontal component. to Reduction of such imbalances are known various balancing devices.
  • the ball balancer has a ring attached to the circumference of the rotating object with an annular cavity in which a number of spherical weights can move freely. Upon rotation of the object, the weights roll to a position in the ring which faces an imbalance and thus compensate for this imbalance.
  • the unbalance compensation in such a ball balancer is only above a critical speed.
  • This critical speed is typically dependent upon the inertia of the rotating mass and the flexibility or spring rate of the suspension of the tub, and is typically above 200 rpm for laundry treatment equipment. In the subcritical speed range, an existing imbalance can even be amplified by the weights of the ball balancer.
  • the DE 198 42 611 C2 discloses a laundry treatment apparatus having a ball balancer and means for detecting imbalances of the drum above the application speed by means of path, attitude or acceleration sensors. To detect the imbalance, the fluctuation of the speed or a speed-dependent signal is evaluated. The spin-up of the drum is then controlled by an evaluation circuit in response to the detected unbalance.
  • the drum is set to a predetermined one Speed greater than the application speed accelerated and then recorded an imbalance.
  • a speed-dependent variable is detected over a predetermined period of time, a phase position of a fluctuation of this at least one speed-dependent variable is determined over the predetermined period of time, and then a magnitude of the unbalance is deduced from a time profile of this phase position.
  • a phase of a fluctuation of this at least one speed-dependent variable is determined, and from a time course of this phase then to a size the imbalance is closed.
  • the inventor has found that the phase angle of the fluctuation of a speed-dependent variable changes with time the more the less the unbalance of the system is. From the time course of this phase position can therefore be concluded more clearly on the size of the imbalance as from the amplitude values, for example, the speed fluctuation.
  • application speed in this context is a speed of the drum to understand, starting from which the laundry in the drum acting centrifugal force is greater than gravity and therefore the laundry rests against the drum shell.
  • this application speed is typically in the range of about 100 rpm.
  • the "phasing" of the fluctuation of the number-dependent magnitude is defined as the drum angle at the time of a maximum value of the respective speed-dependent quantity.
  • the zero position of the drum angle is determined once arbitrarily before the measurement.
  • the maximum value and the associated drum angle are then determined for each individual revolution of the drum.
  • the "predetermined period of time" for detecting the speed-dependent variable and determining the associated phase position of the fluctuation of this speed-dependent variable is chosen as a function of the respective system so that it is sufficiently long for an evaluation.
  • the predetermined period of time is chosen so long that the at least one weight of the Kugelauswuchters at least once circulates around the track.
  • the weights of the ball balancer move slowly along the track relative to the rotating drum and once again circulate the drum within about 40 seconds, for example. Once, the weights amplify the imbalance and compensate it again.
  • the measurable variations in the speed-dependent quantity are more or less sinusoidally modulated with a period of relative movement of the weights of the above-exemplified period of 40 seconds.
  • the predetermined period of time is preferably at least about 20 seconds, more preferably at least about 30 seconds.
  • the “amount of unbalance” in the present invention may be an absolute value of imbalance or a relative value of imbalance (e.g., “too big”, “a little too big”, “small enough”, “hardly exists”, etc.).
  • a value range of the phase position assumed within the predetermined period of time becomes determined and then closed from this range of values to the size of the imbalance.
  • it is concluded from a value range of the phase position of the fluctuation of the at least one speed-dependent variable which exceeds a predetermined span that the unbalance falls below a critical size.
  • This predetermined range of the value range of the phase position is preferably at least about 180 °, more preferably at least about 220 °, even more preferably at least about 250 °.
  • This detection of the monotony of the temporal course of the phase position of the fluctuation of the at least one speed-dependent variable can preferably be combined with the detection of the value range of the phase position of the fluctuation of the at least one speed-dependent variable.
  • the at least one speed-dependent variable may preferably be selected from a rotational speed, a torque, a mechanical power and an electrical power.
  • the predetermined rotational speed of the drum, at which the imbalance is detected is preferably less than a critical rotational speed of the balancing device.
  • the drum is only accelerated to a higher speed when the detected imbalance a critical size falls below. In this way it should be ensured that damage to the laundry treatment devices are avoided or at least reduced even at high speeds.
  • the rotational speed of the drum is accelerated to a higher speed when the fluctuation of the at least one speed-dependent variable is substantially minimal or moves to a minimum.
  • the ball balancer compensates for the imbalance of the drum best.
  • the drum is preferably accelerated with a small speed gradient. This is to avoid that the weights of the Kugelauswuchters are excited by the acceleration forces to change their current position relative to the drum.
  • a laundry treating apparatus under protection comprising a rotatably arranged drum for receiving laundry to be treated, a balancing means having a raceway concentric with the drum and at least one movable along the raceway weight and control means for controlling a rotational speed of the drum and detecting has an imbalance.
  • the control device is designed to carry out the method described above according to the invention.
  • the invention relates to a laundry treatment device, such as a washing machine, a tumble dryer or a washer-dryer, which is equipped with a balancing device in the form of a Kugelauswuchters.
  • a laundry treatment device such as a washing machine, a tumble dryer or a washer-dryer
  • a balancing device in the form of a Kugelauswuchters.
  • the present invention is not limited to any special construction of the ball balancer.
  • the drum is rotatably mounted in a tub or tub of the laundry treatment device.
  • the balancing device has, in particular, a substantially annular raceway arranged concentrically with respect to the drum and a number of movable, for example, spherical weights along the raceway.
  • the ring containing the balls is preferably filled with a fluid, so that the movement of the balls is damped.
  • the laundry In laundry treatment devices, the laundry is above the so-called "application speed" on the circumference of the drum. This results in unbalanced load torque and speed fluctuations, the fluctuation amplitude is usually measured at speeds just above the application speed, eg at 100 rev / min.
  • the weights of the ball balancer slowly migrate at 100 rpm over the circumference of the drum.
  • the balls moved relative to the rotating drum once in about 40 seconds over the entire circumference. The balls reinforce the imbalance once and compensate it another time.
  • the measurable speed fluctuations are very large and are modulated more or less sinusoidally with the period of the relative movement of the weights of the ball balancer from above 40 sec.
  • Fig. 1 shows an example of the time course of the rotational speed n (curve a) and the time course (curve b) of the drum angle ⁇ .
  • the zero point of the angular position ⁇ of the drum was determined arbitrarily.
  • One recognizes in Fig. 1 how the speed n fluctuates around the setpoint of 100 rpm with an amplitude of about 1.6 rpm.
  • the maximum of the rotational speed n is at a point in time at which the angular position ⁇ is approximately 30 °.
  • the phase angle ⁇ of the rotational speed fluctuation ⁇ n with respect to the pitch angle ⁇ is in the case of Fig. 1 thus about 30 °.
  • the amplitude ⁇ n and phase angle ⁇ of the speed fluctuation can be recalculated for each drum revolution.
  • Fig. 2 and 3 now show by way of example how the speed fluctuation amplitudes ⁇ n (curves c) and phase positions ⁇ (curves d) over a longer period - ie over a plurality of drum rotations - in a washing machine with ball balancers at an unbalance load of 0 g imbalance ( Fig. 2 ) or 1,000 g imbalance ( Fig. 3 ) change. At 1000 g imbalance should not be thrown up, with 0 g imbalance this can be done without problems and safe.
  • the maximum amplitudes ⁇ n of the rotational speed fluctuations are not evaluated, but their phase positions ⁇ .
  • the phase positions ⁇ of the rotational speed fluctuation relative to the rotating drum are also recorded.
  • phase angle ⁇ of the rotational speed fluctuation ⁇ n passes through essentially completely 360 °.
  • phase angle ⁇ only a range of values W from about -100 ° to about + 80 °, which results in a span W of about 180 °.
  • the measured phase angle ⁇ of the rotational speed fluctuation ⁇ n is determined by the resulting imbalance from the weights of the ball balancer and the load imbalance in the drum. With little load imbalance as in Fig. 2 is the phase angle ⁇ of the rotational speed fluctuation .DELTA.n determined essentially by the position of the weights of the Kugelauswuchters, which move slowly in or along the track of Kugelauswuchters over 360 °.
  • the phase angle ⁇ the speed fluctuation .DELTA.n is determined in this case by the resulting imbalance and thus essentially by the loading unbalance. This is stationary with the drum, with the result that in this case also the phase position ⁇ of the rotational speed fluctuation ⁇ n remains more or less stationary.
  • the value range W of the measured phase position ⁇ of the rotational speed fluctuation ⁇ n becomes smaller, the larger the mass the loading imbalance against the mass of the weights of the Kugelauswuchters is.
  • the phase angle ⁇ of the rotational speed fluctuation ⁇ n one or more speed-dependent variables such as speed, torque or power relative to the drum over a longer period considered. As soon as the value range span W of the phase angle ⁇ has crossed over a minimum coverage area, it is possible to travel to high rotational speeds.
  • the course of the phase angle ⁇ can be checked for monotony.
  • a turning point in the phasing ⁇ at significantly large amplitude indicates that the loading imbalance is relatively large and the laundry in the drum should be redistributed.
  • the track for the weights of the ball balancer may contain a fluid, particularly a viscous fluid such as an oil, which dampens the movement of the weights.
  • a damping device is to ensure that the weights of the Kugelauswuchters - at least but a critical speed - rotate with the drum and not roll by gravity in the lower part of the track.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP11009353.1A 2010-12-01 2011-11-25 Dispositif de traitement de linge et procédé de commande du fonctionnement d'un dispositif de traitement de linge Not-in-force EP2460921B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11009353T PL2460921T3 (pl) 2010-12-01 2011-11-25 Urządzenie do obróbki bielizny i sposób sterowania pracą urządzenia do obróbki bielizny

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010053104A DE102010053104B4 (de) 2010-12-01 2010-12-01 Wäschebehandlungsvorrichtung und Verfahren zum Steuern des Betriebs einer Wäschebehandlungsvorrichtung

Publications (3)

Publication Number Publication Date
EP2460921A2 true EP2460921A2 (fr) 2012-06-06
EP2460921A3 EP2460921A3 (fr) 2012-11-21
EP2460921B1 EP2460921B1 (fr) 2013-11-20

Family

ID=45098800

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11009353.1A Not-in-force EP2460921B1 (fr) 2010-12-01 2011-11-25 Dispositif de traitement de linge et procédé de commande du fonctionnement d'un dispositif de traitement de linge

Country Status (3)

Country Link
EP (1) EP2460921B1 (fr)
DE (1) DE102010053104B4 (fr)
PL (1) PL2460921T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012021747B4 (de) 2012-06-26 2021-01-28 Diehl Ako Stiftung & Co. Kg Verfahren und Vorrichtung zum Erkennen einer Umwucht in einem Wäschebehandlungsgerät
KR20190125658A (ko) * 2018-04-30 2019-11-07 주식회사 위니아대우 세탁기 및 언밸런스 제어방법
EP4703509A1 (fr) * 2024-08-30 2026-03-04 NXP USA, Inc. Détection de charge équilibrée et déséquilibrée

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19842611C2 (de) 1997-12-10 2000-11-16 Miele & Cie Waschmaschine oder Waschtrockner
DE19952464C2 (de) 1999-10-29 2002-05-08 Miele & Cie Verfahren zum Auswuchten eines rotierenden Körpers, der durch einen geregelten Antrieb in Rotation versetzt wird, und Verwendung des Verfahrens
US6442782B1 (en) 2000-04-27 2002-09-03 Maytag Corporation Ball balancing mechanism

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4038178C2 (de) * 1990-11-30 1994-07-28 Telefunken Microelectron Verfahren zur Unwuchtmessung einer beladenen Wäschetrommel beim Schleudervorgang einer Waschmaschine
DE102006023453B4 (de) * 2006-05-18 2021-02-04 BSH Hausgeräte GmbH Verfahren zur Ermittlung bzw. Verringerung einer Unwucht bei einer Maschine zum Waschen und/oder Trocknen von Wäsche
US7506392B2 (en) * 2006-06-21 2009-03-24 Alliance Laundry Systems Llc Laundry machine control system for load imbalance detection and extraction speed selection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19842611C2 (de) 1997-12-10 2000-11-16 Miele & Cie Waschmaschine oder Waschtrockner
DE19952464C2 (de) 1999-10-29 2002-05-08 Miele & Cie Verfahren zum Auswuchten eines rotierenden Körpers, der durch einen geregelten Antrieb in Rotation versetzt wird, und Verwendung des Verfahrens
US6442782B1 (en) 2000-04-27 2002-09-03 Maytag Corporation Ball balancing mechanism

Also Published As

Publication number Publication date
DE102010053104A1 (de) 2012-06-06
EP2460921B1 (fr) 2013-11-20
PL2460921T3 (pl) 2014-05-30
EP2460921A3 (fr) 2012-11-21
DE102010053104B4 (de) 2012-12-13

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