EP1036873B1 - Procédé pour essorer du linge mouillé - Google Patents

Procédé pour essorer du linge mouillé Download PDF

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Publication number
EP1036873B1
EP1036873B1 EP00104165A EP00104165A EP1036873B1 EP 1036873 B1 EP1036873 B1 EP 1036873B1 EP 00104165 A EP00104165 A EP 00104165A EP 00104165 A EP00104165 A EP 00104165A EP 1036873 B1 EP1036873 B1 EP 1036873B1
Authority
EP
European Patent Office
Prior art keywords
liquid
rotational speed
solution container
speed acceleration
phase
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.)
Expired - Lifetime
Application number
EP00104165A
Other languages
German (de)
English (en)
Other versions
EP1036873A2 (fr
EP1036873A3 (fr
Inventor
Edwin Bolduan
Ingo Schulze
Horst Wiemer
Gundula Czyzewski
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
Publication of EP1036873A2 publication Critical patent/EP1036873A2/fr
Publication of EP1036873A3 publication Critical patent/EP1036873A3/fr
Application granted granted Critical
Publication of EP1036873B1 publication Critical patent/EP1036873B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/40—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of centrifugal separation of water from the laundry
    • 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
    • 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 spinning wet laundry in a rotatable Drum during the final spin cycle of a full laundry treatment program a laundry treatment machine with a tub for receiving the drum.
  • a laundry treatment machine such as a washing machine or a
  • the spin dryer can spin the laundry at high speed contained liquid can be removed to a large extent.
  • the liquid is in ejected the tub from which it must be removed. This is in the Usually a drain pump is connected to the tub with which the spun out Liquid can be drained. You can use it to empty the tub other devices such as a simple exhaust valve can also be used.
  • the amount of liquid ejected per unit of time is in particular from Spin speed and the amount of liquid contained in the laundry. Therefore it can happen that a lot of liquid is spun out at the beginning despite the low speed because the laundry still contains a lot of liquid.
  • the thrown out Liquid is removed from the tub using the drain pump or other device removed, the amount of liquid that can be drained per unit time not usually is variable and in particular limited.
  • liquid level in the tub increases and can even reach the drum.
  • liquid can be entrained due to the rapid rotation of the drum and circulated in the tub so that there is a liquid ring forms that can not be removed and brakes the drum movement.
  • the amount of liquid spun out too little the liquid level in the tub sink so far that an inserted drain pump draws in air, only a reduced one Delivery rate achieved and also emits annoying slurping noises.
  • a method is known from DE 40 12 115 A1 in which the pumping-out time period between two suds container liquid levels and the measured value as a measure of one subsequent spin acceleration is used.
  • Aim of the known method it is that the centrifugal run-up time depending on the time for pumping out the Liquid time is processed.
  • this method particularly points out the following disadvantages.
  • By influencing a subsequent spin acceleration the current spin-up cannot necessarily be improved become.
  • a value measured at an earlier point in time is used for the optimization, which, however, may have already changed in the meantime, so that the optimization may be based on an incorrect value. It is also per unit of time ejected amount of liquid very unevenly over time, so that with a single setting for the spin-up acceleration a short over or Falling below limit values cannot be excluded.
  • a method according to the preamble of claim 1 is known from GB 1268388.
  • the invention has for its object to a method of the type mentioned create with which the liquid can be ejected quickly from the laundry and Avoiding too high or too low liquid levels in the tub can be.
  • this object is achieved in that the speed acceleration during spin-up, depending on the measured size of the current liquid level in the tub both up and down can be changed.
  • the speed acceleration the Spin speed and in particular the amount of liquid ejected per unit of time affected, which together with the per unit time removed from the tub
  • the amount of liquid has a significant influence on the liquid level. In this way can affect the amount of liquid ejected and the liquid level, and in particular are kept in the optimal range.
  • a pressure sensor can be used to measure the liquid level in the tub can be used, which is connected to the tub.
  • you can other sensors such as sound sensors or floats can be used. If a measurement of the actual value of the speed acceleration, for example, to that Regulation is necessary, this can be a speed sensor or directly an acceleration sensor be used.
  • the speed acceleration can be reduced if the measured liquid level in the tub rises or an upper one Limit exceeded.
  • the amount of liquid ejected per unit of time or its quantity Rise is reduced in this way, so that the liquid level in the tub can be reduced.
  • This can be done in a known manner for increasing the speed Centrifugal run-up profile can be provided, which is expedient for acceleration the spin process is as steep as possible.
  • the spin cycle can be shortened optimally in this way because the acceleration can be selected very high and only when there is a threat adverse consequences due to too high a liquid level is reduced, otherwise for example, by moistening the laundry with the laundry already spun out Liquid or through the formation of a liquid ring to regress at Can cause skidding.
  • the speed acceleration can also be increased if the measured liquid level in the tub or falls below a lower limit.
  • a liquid level that is too low can be avoided in this way become.
  • an unnecessarily low speed acceleration, at which spins less liquid than is removed from the tub could only be provided in exceptional situations, since they disadvantageously lead to a Delay in the spin cycle.
  • the measured liquid level in the tub can be changed by changing the speed acceleration are regulated, with a constant value or a range as the control target can be specified.
  • the limits of a control range can be selected that liquid ring formation and suction of air through a drain pump can be avoided.
  • the liquid level can also be used to determine other methods such as by using a fuzzy interpreter or an or several neural networks or a combination of these methods with each other or with other regulatory procedures.
  • the speed acceleration can be above a minimum value being held. This does not have to mean that the regulation is invalid is set, but only that by observing this temporarily introduced boundary condition falling below the minimum value is prevented. If the due to the Regulation resulting speed acceleration is above the minimum value anyway no intervention in the regulation takes place. This makes the resonance range fast drive through so that the adverse vibrations occurring in this area on a be reduced as little as possible.
  • the speed acceleration for lowering the liquid level in the tub can be reduced. Because when driving through the Resonance range with a minimum acceleration of the liquid level under certain circumstances is not regulated for a short time, the amount of liquid ejected per unit of time become too large so that the liquid level rises and possibly a limit value exceeds.
  • the fluid level By lowering the fluid level beforehand, there can be space for one short-term and possibly large amounts of fluid can be created, so that the Target range for the liquid level can be better maintained.
  • a drain pump of the laundry treatment machine can be used to empty the drain container switched off or their delivery capacity reduced if at maximum Speed acceleration the measured liquid level in the tub a lower Falls below the limit. If there is no longer any liquid in the laundry can eject a sufficient amount, despite maximum speed acceleration the liquid level drops so far that the drain pump sucks in air. Thereby the delivery rate can decrease, so that afterwards ejected liquid quantities can no longer be pumped out or disruptive slurping noises occur. By Timely switching off the drain pump can suck in air and the air associated disadvantages can be avoided.
  • the method can be used for the measurement of the liquid level in the tub on the liquid floating foam be taken into account.
  • a sensor can be provided, the foam or the level of the liquid plus any foam floating thereon. This is particularly important if an upper limit is to be maintained, since a Sweeping floating foam through the rotating drum as well as a Liquid entrainment can have adverse consequences.
  • a drain pump in usually foam, like air can only convey poorly.
  • the level of a Foam floating on it - if necessary evaluated with a factor - are added, whereas for the monitoring of a lower limit the liquid level remains unchanged is used.
  • a time axis t is shown horizontally which are marked phases A to J, where A is the transition from the previous one Operation to spin and J denotes the end of the spin.
  • phase A the laundry is soaked with a liquid to be ejected, with which the tub is partially filled, with the drum rotating at a low speed f.
  • the drain pump is activated for emptying. After a slight delay in starting the drain pump, the liquid level h shown in FIG. 2 begins to decrease.
  • phase B Spin start of the drum started.
  • a control is effective, which is the speed acceleration controls so that the liquid level h remains essentially constant.
  • phase C Shortly before the speed f reaches the resonance range R, in phase C for a short Time reduces the speed acceleration, whereby the fluid level h drops. Then the speed acceleration is greatly increased in phase D, so that the resonance range R can be passed quickly.
  • the liquid level r increases in the Phase D is strong, but has just been achieved through the preventive reduction in phase C. the setpoint.
  • the regulation for speed acceleration is not effective and during the phase D an additional condition is met so that the control is only overridden if the speed acceleration is too low.
  • the liquid level h again regulated without a boundary condition so that it is kept at the setpoint again.
  • the speed acceleration has its Maximum value reached so that the control system has reached a stop and no longer is effective.
  • phase G a boundary condition with regard to the maximum drum speed thus becomes effective, which also overrides the control.
  • the liquid level h continues to drop until it reaches a value at time G 0 , at which, as shown in FIG. 3, the drain pump is switched off in order to prevent air from being sucked in.
  • the drain pump operates continuously during phases B to F. With the method according to the invention it is achieved, inter alia, that the drain pump is switched on and off only once, so that the number of disruptive switching on and off operations is minimized.
  • the drum is topped until a very low speed is reached at which the drum is rotated for a certain time in phase J in order to loosen up the laundry lying on the inside of the drum due to the spinning.
  • a control of the liquid level in the tub by influencing the speed acceleration takes place in the described embodiment only in phases B. and E instead.
  • phases C, D and G the speed or its acceleration influenced by additional boundary conditions.
  • phase F is already the Maximum value for the speed acceleration reached, so that control is also not takes place.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Claims (6)

  1. Procédé pour essorer du linge mouillé dans un tambour rotatif pendant la phase d'essorage terminale d'un programme complet de traitement de linge dans une machine pour traiter le linge comprenant une cuve pour accueillir le tambour, caractérisé en ce que l'accélération de la vitesse de rotation lors de la montée en régime pour l'essorage (phases B à F) est modifiable non seulement à la hausse, mais aussi à la baisse, en dépendance de la grandeur mesurée du niveau actuel de liquide (h) dans la cuve.
  2. Procédé selon la revendication 1, caractérisé en ce que le niveau de liquide mesuré (h) dans la cuve est réglé par modification de l'accélération de la vitesse de rotation, une valeur constante ou une plage étant prédéterminées en tant qu'objectif de réglage.
  3. Procédé selon l'une des revendications 1 et 2, caractérisé en ce que l'accélération de la vitesse de rotation est maintenue au-dessus d'une valeur minimale dans la plage (R, phase D) d'une vitesse de rotation de résonance.
  4. Procédé selon la revendication 3, caractérisé en ce que, avant d'atteindre une vitesse de rotation de résonance (R), lors de la montée en régime pour l'essorage (phase C), l'accélération de la vitesse de rotation est réduite pour abaisser le niveau de liquide (h) dans la cuve.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce qu'une pompe à lessive de la machine pour traiter le linge servant à vider la cuve est arrêtée ou en ce que son débit est réduit si, lors de l'accélération maximale de la vitesse de rotation, le niveau de liquide (h) mesuré tombe en dessous d'une valeur limite inférieure (instant G0) dans la cuve.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce qu'il est tenu compte, lors de la mesure du niveau de liquide (h) dans la cuve, de mousse qui surnage sur le liquide.
EP00104165A 1999-03-01 2000-02-29 Procédé pour essorer du linge mouillé Expired - Lifetime EP1036873B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19908802A DE19908802A1 (de) 1999-03-01 1999-03-01 Verfahren zum Schleudern von nasser Wäsche
DE19908802 1999-03-01

Publications (3)

Publication Number Publication Date
EP1036873A2 EP1036873A2 (fr) 2000-09-20
EP1036873A3 EP1036873A3 (fr) 2000-10-04
EP1036873B1 true EP1036873B1 (fr) 2004-02-25

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Family Applications (1)

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EP00104165A Expired - Lifetime EP1036873B1 (fr) 1999-03-01 2000-02-29 Procédé pour essorer du linge mouillé

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EP (1) EP1036873B1 (fr)
DE (2) DE19908802A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPN20010053A1 (it) * 2001-08-10 2003-02-10 Electrolux Zanussi Elettrodome Metodo per controllare la velocita' di rotazione del cesto di una lavatrice per la centrifugazione della biancheria.
DE102021202228A1 (de) * 2021-03-09 2022-09-15 BSH Hausgeräte GmbH Wäschepflegegerät mit einer Steuerung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2340391A2 (fr) * 1976-02-03 1977-09-02 Thomson Brandt Machine a laver le linge a tambour horizontal
DE3445877A1 (de) * 1984-12-15 1986-06-26 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Programmsteuervorrichtung fuer eine waschmaschine
ES2056341T3 (es) * 1989-11-22 1994-10-01 Zanussi A Spa Industrie Lavadora automatica del tipo de tambor rotativo.
DE19619601A1 (de) * 1996-05-15 1997-11-20 Aeg Hausgeraete Gmbh Verfahren zur Steuerung des Schleuderbetriebs einer Waschmaschine

Also Published As

Publication number Publication date
EP1036873A2 (fr) 2000-09-20
DE19908802A1 (de) 2000-09-07
EP1036873A3 (fr) 2000-10-04
DE50005370D1 (de) 2004-04-01

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