EP2044252A1 - Procédé de traitement de linge, ainsi que machine à laver appropriée à cet effet - Google Patents

Procédé de traitement de linge, ainsi que machine à laver appropriée à cet effet

Info

Publication number
EP2044252A1
EP2044252A1 EP07730198A EP07730198A EP2044252A1 EP 2044252 A1 EP2044252 A1 EP 2044252A1 EP 07730198 A EP07730198 A EP 07730198A EP 07730198 A EP07730198 A EP 07730198A EP 2044252 A1 EP2044252 A1 EP 2044252A1
Authority
EP
European Patent Office
Prior art keywords
drum
water
laundry
hydrostatic pressure
washing machine
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
EP07730198A
Other languages
German (de)
English (en)
Other versions
EP2044252B1 (fr
Inventor
Thorsten Schiegl
Cornelia Witt
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 EP2044252A1 publication Critical patent/EP2044252A1/fr
Application granted granted Critical
Publication of EP2044252B1 publication Critical patent/EP2044252B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • D06F34/18—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
    • 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
    • D06F2103/18—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
    • D06F2105/02—Water supply

Definitions

  • the invention relates to a method for treating laundry in a program-controlled washing machine and to a washing machine which is particularly suitable for carrying out this method.
  • the invention relates to a method for treating laundry with a wetting phase, in which the addition of water can be controlled by comparing measured values with predetermined threshold values.
  • the wetting phase should be optimized so that each batch of laundry is wetted completely and evenly with a coordinated amount of water in the tub before the actual washing process in the shortest possible time.
  • DE 10 2004 039 662 A1 describes a program-controlled washing machine with a wetting process, which can be adapted to the amount of laundry in a laundry drum rotatably mounted in a tub about a non-vertical axis by means of a water supply system and a control device, by which the supply of water is temporally controllable in the tub, wherein the wetting process in as many phases (Ph1 to Ph3) is divided, as quantity levels (small, medium, large) are provided for the laundry to be treated.
  • the previously known wetting processes or phases can be further optimized.
  • the known wetting processes still take into account too little different amounts of laundry, so that in the case of very large items of laundry (ie laundry items near the loading limit), no complete wetting takes place.
  • the wetting phase for small items of laundry often takes too long, measured by their wetting success.
  • the uniformity of wetting can be further improved. The object of the invention was therefore to provide a method for treating laundry in a program-controlled washing machine, in which the wetting phase can be controlled so that a laundry item is detected quickly and accurately.
  • the invention thus relates to a method for treating laundry in a program-controlled washing machine with a sensor for determining a level of the liquid in the tub (i.e., the hydrostatic pressure p) whose sensor signal is recorded during the process and a drum, in a wetting phase
  • a) during the rotation of the drum water is filled until reaching a predetermined threshold for the hydrostatic pressure p and until reaching a predetermined threshold for the temporal gradient (.DELTA.p / .DELTA.t) of the hydrostatic pressure p in the tub, and / or
  • the hydrostatic pressure p measured with the aid of the sensor can be compared with the filled-in amount of water q.
  • the laundry in the drum absorbs water, which therefore does not increase the hydrostatic pressure can contribute.
  • the measured hydrostatic pressure and the accumulated amount of water - the absolute values p, q and their temporal change (.DELTA.p / .DELTA.t), (.DELTA.q / .DELTA.t) - with corresponding values stored in the program control of a washing machine for the moistening of laundry can be determine the amount of laundry in terms of its quantity, its pumping speed and its degree of moisture penetration (degree of wetting).
  • the duration of the wetting phase and the amount of water required for wetting can be tailored very precisely to the given amount of laundry.
  • process step a) water is introduced until a predetermined threshold value pi for the hydrostatic pressure p and a predetermined threshold value ( ⁇ p / ⁇ t) i for the temporal gradient of the hydrostatic pressure p is reached. This will generally signal to the program a sufficient wetting of the laundry cost, so that the actual washing can begin.
  • the hydrostatic pressure p and / or a predetermined amount for the process step a) has reached a predetermined value, but the gradient (.DELTA.p / .DELTA.t) i not, the filling of water is stopped and it can continue in the Water is introduced into the tub via a pre-set hysteresis, preferably via a small hysteresis.
  • “hysteresis” is the pressure difference between the pressure at the upper switching point for the water supply and the pressure at the lower switching point for the water supply According to the invention, it is preferable for this pressure difference (hysteresis) to be in the range from 10 to 150 Pa, more preferably from 20 to 100 Pa and most preferably in the range from 30 to 70 Pa.
  • the predetermined point in time ti is generally based on specific points that are to be classified as critical with regard to the distinctness of the laundry loadings. Such a point in time is reached, for example, when, in a method for treating laundry, the one actually intended for a particular loading stage (amount of laundry) Amount of water q ⁇ m jt is reached. Accordingly, in embodiments of the invention, provision may be made for method step b) to be carried out at a plurality of points in time (ti, t 2 , -3, etc.).
  • the method step b) is based on the fact that with increasing saturation of the laundry with water more relatively free water is present, which can run back relatively quickly due to gravity from the laundry in the tub.
  • the hydrostatic pressure p determined in this way can preferably be used to vary or adapt the further load-dependent parameters of the wetting phase and / or of the further program sequence.
  • step b) If the comparison of the hydrostatic pressure p present in step b) after a certain time with a predetermined value indicates insufficient wetting of the laundry, in particular further predetermined threshold values p 2 , P3, etc. for the hydrostatic pressure p and further predetermined threshold values ( ⁇ p / ⁇ t) 2 , ( ⁇ p / ⁇ t) 3 , etc. for a process step a) following the process step b) or another time t 2 , t 3 , etc. for a next critical point of a next larger loading stage or to be selected.
  • the drum is rotated for a few seconds to minutes, preferably at a speed, before the re-water inlet from 10 to 50 revolutions per minute. As a result, the freed water is re-entered into the laundry.
  • only method step a) is carried out. In an alternative embodiment of the method according to the invention, however, only the method step b) is performed.
  • step a) it is preferred if both process steps a) and b) are carried out.
  • the amount of water q filled is measured, and step a) ends when, for the treatment of laundry, the quantity qiimit actually provided for a particular loading stage (amount of laundry) is reached.
  • the water retention capacity of the laundry is therefore preferably used in addition to the suction capacity of the laundry for the determination of criteria for controlling the network phase.
  • the drum is preferably rotated in a certain direction.
  • the wetting phase will generally be completed and a washing process started.
  • other method steps for example, a soaking of the laundry for a predetermined period of time without drum movement done, are performed, which then usually followed by a conventional washing process.
  • the direction of rotation of the laundry drum corresponds to the direction of the effectiveness of a scooping device.
  • the laundry is thoroughly moistened, so that the amount of the accumulated water can be determined more accurately.
  • a measuring device may be present, for example, a timing device for determining the opening period of a feed valve for the water or a liquid amount measuring device for measuring the amount of liquid filled.
  • the invention also relates to a washing machine with a program control for controlling the program flow, a rotatably mounted in a tub drum, a drive motor for the drum, a sensor for determining the height of the liquid in the tub and switching means for rotating and stopping the drum the switching means and the sensor can perform the method of the invention.
  • the program control comprises storage means in which the threshold value or the threshold values p x , the threshold value or the threshold values ( ⁇ p / ⁇ t) x for the time gradient of the hydrostatic pressure p and the predetermined amounts of water for the respective loading stages are stored.
  • the values can be stored in tabular form, wherein a threshold value p x for the hydrostatic pressure p and a threshold value ( ⁇ p / ⁇ t) x for the time gradient of the hydrostatic pressure p are assigned to a given amount of water.
  • these values are sorted in an ascending order relative to values of the given amount of water.
  • the Program control via at least one comparison device which a measured hydrostatic pressure p, the temporal change (.DELTA.p / .DELTA.t) and / or a supplied amount of water q with one of the variables associated limits p x , (.DELTA.p / .DELTA.t) x and q ⁇ imit x compare can and which can generate a signal when exceeded. With such a signal, the switching means for controlling the wetting phase can be influenced.
  • the index x denotes a particular value from a selection of several possible values.
  • the washing machine in a preferred embodiment comprises at least one of the above-mentioned measuring devices for determining the amount of water q filled.
  • Figure 1 a schematic representation of the relevant parts of the invention for a washing machine
  • Figure 2 is a schematic diagram of a timing of the
  • Figure 3 a schematic representation of temporal courses of the hydrostatic
  • FIG. 4 a schematic representation of a time course of the hydrostatic pressure p (solid line) and its temporal
  • FIG 1 is a schematic representation of the relevant parts of the invention for a washing machine in which a method according to the invention can be carried out.
  • the washing machine of the embodiment shown in Figure 1 comprises a tub 1, in which a drum 2 rotatably mounted and can be operated by the drive motor 14.
  • a small angle eg 13 °
  • the 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 Whynd ("Ein Hamptonschale") 11, from which the feed water
  • a heating device 13 is located in the tub 1.
  • the valve 9 as well as the heating device 13 can be controlled by a control device (“program control”) 12 in accordance with a program flowchart which corresponds to a time program and / or or to the attainment of certain measured values of parameters such as liquor level, liquor temperature, speed of the laundry drum, etc., within the washing machine, in particular to the threshold values predetermined in process steps a) and / or b).
  • the washing machine comprises a measuring device 16 for determining the amount of water q filled.
  • You can, for example, as a water meter or as a Be formed flow meter. In the case of a flowmeter, the amount of water q is calculated in conjunction with a detected filling time. It is also conceivable to determine the flow by measuring the time to reach a predetermined level height, which corresponds to a certain fixed amount of water.
  • the signal of the measuring device 16 is supplied to the control device 12.
  • the invention has numerous advantages. With the method according to the invention, it is possible to estimate the amount of laundry to be treated in a simple and reliable manner in order to adapt the further course of the wetting phase to it. In particular, it is easy to differentiate between different loadings or loading stages.
  • the process step a) (phase B) during a continuous rotation of the drum 2 at a speed n1, preferably at a speed of 10 to 50 revolutions per minute, water the tub 1 supplied.
  • the direction of rotation of the drum 2 is in an optimal direction for the scooping device 5 17, whereby the present in the tub water 6 is returned to the drum 2.
  • the detected values for hydrostatic pressure p, their temporal change ( ⁇ p / ⁇ t) and the supplied amount of water q are measured and each associated limit values pi, ( ⁇ p / ⁇ t) i and q ümit 1, which for one for small load of normal absorbency apply, compared.
  • the control device 12 comprises a comparator 121 to which the measured values and the limit values are supplied. If one or more limit values are exceeded, the comparator 121 can generate a signal which is used to further control the method and / or the further program sequence.
  • the rotation of the drum 2 is reversing.
  • Such a design is used in particular for washing machines that have no scooping device 5.
  • the hydrostatic pressure p increases depending on the laundry load 7 and its pumping speed.
  • the time change ( ⁇ p / ⁇ t) of the hydrostatic pressure p varies. An example is shown in FIG. Only at the time t ( ⁇ p / ⁇ t) 1, both the hydrostatic pressure p exceed the threshold value pi and the time change ( ⁇ p / ⁇ t) of the hydrostatic pressure p exceed the threshold value (ApZAt) 1 .
  • process step b) begins. Turning the drum 2 and filling the water are stopped. Now, when the drum 2 is at a standstill, the hydrostatic pressure p or its temporal change ( ⁇ p / ⁇ t) is tracked.
  • phase B' in Figure 2 A are the limits P2 (Ap / At) 2 and q ⁇ m j t 2, which are valid for a normal for an average load amount absorbency , fixed, ie a second criticality point reached at time t 2 , is selected.
  • P2 (Ap / At) 2 and q ⁇ m j t 2 which are valid for a normal for an average load amount absorbency , fixed, ie a second criticality point reached at time t 2 , is selected.
  • phase B If in the phase B 'of the set for an average wash load limit value q l i m i t 2, is reached first or if) (Phase C) determined in a subsequent process step b a larger or more absorbent laundry load than for medium normally absorbent laundry load can, further process steps b) and a), for example, phase B ", in which the limits P 3 , (.DELTA.p / .DELTA.t) 3 and predetermined for a given amount of water a limit q ⁇ imit 3, which is normal for one for a large load Absorbency apply.
  • the measured amount of water is compared with a maximum predetermined amount of water q ⁇ mit max, which must not be exceeded during the wetting phase.
  • the maximum amount of water q ⁇ with max during the wetting phase is reached, the filling of water and the active wetting phase are ended.
  • the normal washing phase D As shown in FIG. 2, the drum 2 can be operated at a speed n 2 suitable for washing, which is higher than the speed ni of the wetting phase.
  • further filling of water may be provided via a preset hysteresis.
  • FIG. 3 An example of a time course of the hydrostatic pressure p is shown in FIG.
  • the course corresponds to the courses of the wetting phases A, A 'and A "shown in Fig. 2.
  • Shown in Fig. 3 are respective courses for a small (1 kg), a medium (3 kg) and a large (6 kg) loading stage ,
  • the wetting phase can be automatically adapted to the amount of laundry of a laundry item, so that with uniform wetting the laundry is wetted before the actual washing process with the optimum amount of water or alkali.
  • the inventive method for wetting laundry is equally suitable for wetting of dry laundry at the beginning of a wash cycle as well as for wetting wet laundry at the beginning of a rinse cycle.
  • Deviating limit values or threshold values may be specified for the latter case.

Abstract

L'invention concerne un procédé de traitement de linge dans une machine à laver commandée par programmes, comprenant un capteur (15) pour déterminer une hauteur du liquide présent dans le bac à lessive (1), dont le signal de détection est enregistré pendant le procédé, et un tambour (2). Dans une phase de mouillage, le procédé est caractérisé en ce que, a) pendant la rotation du tambour (2), de l'eau est versée jusqu'à atteindre une valeur seuil prédéterminée (p1, p2, p3) pour la pression hydrostatique p et jusqu'à atteindre une valeur seuil prédéterminée ((p/t)1 (p/t)2, (p/t)3) pour les gradients temporels de la pression hydrostatique p, et/ou b), à un moment prédéfini (t1 t2, t3) au cours du procédé, la rotation du tambour (2) et le remplissage d'eau se terminent et le changement de la pression hydrostatique p en raison du retrait de l'eau est évalué pour déterminer une quantité de charge. L'invention concerne également une machine à laver appropriée pour réaliser le procédé.
EP07730198.4A 2006-07-04 2007-06-15 Procédé de traitement de linge, ainsi que machine à laver appropriée à cet effet Active EP2044252B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006030891A DE102006030891A1 (de) 2006-07-04 2006-07-04 Verfahren zur Behandlung von Wäsche sowie hierzu geeignete programmgesteuerte Waschmaschine
PCT/EP2007/055963 WO2008003577A1 (fr) 2006-07-04 2007-06-15 Procédé de traitement de linge, ainsi que machine à laver appropriée à cet effet

Publications (2)

Publication Number Publication Date
EP2044252A1 true EP2044252A1 (fr) 2009-04-08
EP2044252B1 EP2044252B1 (fr) 2016-08-17

Family

ID=38520953

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07730198.4A Active EP2044252B1 (fr) 2006-07-04 2007-06-15 Procédé de traitement de linge, ainsi que machine à laver appropriée à cet effet

Country Status (4)

Country Link
EP (1) EP2044252B1 (fr)
DE (1) DE102006030891A1 (fr)
PL (1) PL2044252T3 (fr)
WO (1) WO2008003577A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103290650A (zh) * 2012-02-24 2013-09-11 博西华电器（江苏）有限公司 洗衣机的控制方法

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US7930786B2 (en) * 2008-03-31 2011-04-26 Whirlpool Corporation Method for determining load size and/or setting water level in a washing machine
US7930787B2 (en) * 2008-03-31 2011-04-26 Whirlpool Corporation Method for determining load size and/or setting water level in a washing machine
EP2202343B1 (fr) * 2008-12-18 2017-04-12 BSH Hausgeräte GmbH Procédé de traitement du linge ainsi que lave-linge adapté
US9139946B2 (en) * 2009-12-31 2015-09-22 Arcelik Anonim Sirketi Washing machine wherein the type and amount of laundry can be detected
US9416652B2 (en) 2013-08-08 2016-08-16 Vetco Gray Inc. Sensing magnetized portions of a wellhead system to monitor fatigue loading
FR3117134B1 (fr) * 2020-12-09 2023-11-24 Groupe Brandt Procédé de lavage de linge, machine à laver et programme mettant en œuvre un tel procédé

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DE3030491C2 (de) * 1980-08-12 1985-08-08 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Verfahren zum Bemessen der automatisch zulaufenden Wassermenge und Waschmaschine zur Durchführung des Verfahrens
DE4304031A1 (de) * 1993-02-11 1994-08-18 Licentia Gmbh Trommelwaschmaschine mit einer Programmablaufsteuereinrichtung
DE4331603A1 (de) 1993-09-17 1995-03-23 Licentia Gmbh Verfahren zur Ermittlung wäschespezifischer Parameter in Haushalt-Waschmaschinen und Vorrichtung zur Durchführung des Verfahrens
DE19538291C2 (de) * 1995-10-14 2001-07-12 Aeg Hausgeraete Gmbh Verfahren zur Ermittlung des Wasseraufnahmegrades von Wäsche
DE10136519B4 (de) * 2001-07-26 2004-09-02 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben einer programmierbaren Waschmaschine und dafür geeignete Waschmaschine
KR100444958B1 (ko) * 2002-02-20 2004-08-21 삼성전자주식회사 세탁기의 제어방법
EP1350881B1 (fr) * 2002-04-02 2005-12-28 Whirlpool Corporation Procédé pour commander le programme d'une machine à laver et machine à laver utilisant un tel procédé
DE10234473A1 (de) * 2002-07-29 2004-02-12 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum beschleunigten Benetzen von Wäsche in einer Trommelwaschmaschine
DE102004039662A1 (de) * 2004-08-16 2006-02-23 BSH Bosch und Siemens Hausgeräte GmbH Programmgesteuerte Waschmaschine
DE102005012426A1 (de) * 2005-03-17 2006-09-21 BSH Bosch und Siemens Hausgeräte GmbH Benetzungsprozess für die Wäsche in einer programmgesteuerten Waschmaschine

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103290650A (zh) * 2012-02-24 2013-09-11 博西华电器（江苏）有限公司 洗衣机的控制方法

Also Published As

Publication number Publication date
EP2044252B1 (fr) 2016-08-17
WO2008003577A1 (fr) 2008-01-10
DE102006030891A1 (de) 2008-01-10
PL2044252T3 (pl) 2017-01-31

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