EP1707663A1 - Verfahren zum Steuern eines oder mehrerer Parameter eines Waschvorgangs und Maschine für ein derartiges Verfahren - Google Patents

Verfahren zum Steuern eines oder mehrerer Parameter eines Waschvorgangs und Maschine für ein derartiges Verfahren Download PDF

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Publication number
EP1707663A1
EP1707663A1 EP06290510A EP06290510A EP1707663A1 EP 1707663 A1 EP1707663 A1 EP 1707663A1 EP 06290510 A EP06290510 A EP 06290510A EP 06290510 A EP06290510 A EP 06290510A EP 1707663 A1 EP1707663 A1 EP 1707663A1
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EP
European Patent Office
Prior art keywords
detergent
conductivity
washing
textile
control method
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
EP06290510A
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English (en)
French (fr)
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EP1707663B1 (de
Inventor
Carène Tissot
Caroline Ulmer
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Groupe Brandt SAS
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Brandt Industries SAS
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Publication of EP1707663A1 publication Critical patent/EP1707663A1/de
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Publication of EP1707663B1 publication Critical patent/EP1707663B1/de
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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
    • D06F34/22—Condition of the washing liquid, e.g. turbidity
    • 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
    • D06F33/36—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of washing
    • 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
    • D06F2103/20—Washing liquid condition, e.g. turbidity
    • 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

Definitions

  • the present invention relates to a method of controlling one or more parameters of a washing process.
  • It also relates to a washing machine, and especially to wash the laundry, washing machine type or washer-dryer for domestic use, adapted to implement the servo process according to the invention.
  • the present invention relates to the field of washing and aims to enslave one or more parameters of the washing process (washing, rinsing, spinning) to adapt it to the washing conditions.
  • the present invention thus aims in particular to improve the effectiveness of the washing or rinsing implemented.
  • Washing machines are already known which propose several washing programs, depending in particular on the type of textile to be washed.
  • washing programs are thus generally modified in terms of the duration of the washing phase, or else the maximum speed of rotation of the drum during a spinning phase between different rinsing phases.
  • these conventional washing processes generally comprise several intermediate spinning operations intended to evacuate a maximum of dirty water from the laundry between different rinsing phases.
  • the intermediate spinning are relatively long, between 5 and 8 minutes, and made at high speed of the rotary drum, of the order of 1050 revolutions / minute. These intermediate spinning have the disadvantage of accelerating the wear of the laundry and his rustling. They also cause significant noise, of the order of 70 dBA.
  • the present invention aims to optimize the performance of a washing process while minimizing the consumption of water and energy, and possibly the noise constraints.
  • the present invention relates to a method for controlling one or more parameters of a washing process, in which the value of the parameter or parameters is set according to a function dependent on at least the type and / or the quantity. detergent used in said washing process.
  • the Applicant has found that the type and / or amount of detergent used, which may be for example in the form of liquid, compact or dispersed powder, have a strong influence on the efficiency of the rinsing and washing.
  • the parameters of the washing process are chosen in particular from the duration of the washing, rinsing or spinning phases, the speed of rotation of a washing drum, or the number of rinsing or dewatering phases.
  • the servo-control method comprises a step of determining the type and / or amount of detergent used in the washing process, this determining step comprising a step of measuring the conductivity of a detergent bath.
  • the step of determining the type and / or amount of detergent used includes a step of calculating a ratio of a value of the conductivity associated with the feed water and the measured value of the conductivity of a detergent bath, and a step of comparing said ratio with one or more predetermined threshold values, thus making it possible to classify the detergent used in different categories of detergent.
  • the value of the parameter (s) is set according to a further dependent function of at least the type of textile and the weight of textile to be washed.
  • one of said parameters is an intermediate spinning time in a rinsing phase of the textile washing process.
  • the parameter can also be a maximum rotation speed of a washing drum adapted to contain textile.
  • this machine comprises in particular means for determining the type and / or the amount of detergent.
  • This washing machine has characteristics and advantages similar to those described above with reference to the control method that it implements.
  • a washing machine 10 suitable for carrying out the present invention will be described first with reference to FIG.
  • This washing machine may be a household washing machine or a washer-dryer.
  • an overhead loading machine has been illustrated.
  • the present invention applies to all types of washing machine, including front loading.
  • such a washing machine 10 comprises a washing tub 11 and a drum 12 rotatably mounted, here along a horizontal axis 13, inside this washing tub 11.
  • a door (not shown) located on the upper face of the machine allows the user to access the inside of the tank and the drum to introduce or remove the laundry.
  • a control panel 14 is also provided in the upper part of the machine.
  • the washing machine comprises all the equipment and means necessary for the implementation of a conventional washing process in such a rotary drum machine.
  • control board 14 includes means for determining the type of detergent.
  • the user can indicate with a selection button the type of detergent used.
  • Illustrative here is a possible choice of detergent among a set comprising detergents in the form of liquid, gel, compacted powder (tablet) or dispersed.
  • the means for determining the type of detergent could be different as long as they are suitable for classifying the detergent among a set of detergents as described above.
  • a sensor placed in a detergent receiving pan could determine the type of detergent used automatically, without user intervention.
  • the user must then place the detergent in the tray.
  • the determination of the type and amount of detergent used can be carried out automatically, without user intervention, by means of a conductivity sensor 16 placed in the tank 11 and preferably at the bottom of the tank. The operation of this sensor 16 will be described later.
  • this sensor 16 makes it possible to periodically or continuously measure the conductivity of the washing or rinsing bath present in the tank.
  • the washing machine further comprises means for determining the type of textile 17, illustrated here, in a nonlimiting manner, by a selection button allowing the user to select the type of textile from a set consisting for example of cotton type , synthetic, wool.
  • the washing machine in this embodiment comprises means for determining the textile weight introduced into the drum.
  • This measurement of the weight can be performed by one of the known weight measuring means based on a pressure switch placed in relation to the tank. Depending on the electrical value measured at the terminals of this pressure switch, it is possible to determine the weight of the laundry introduced into the drum.
  • These textile weight determination means can be adapted to define load families associated with a weight range.
  • a first family CV1 corresponds to a textile load of between 0 and 2 kilos
  • a second family CV2 corresponds to a textile load of between 2 and 3 kilos
  • a third family CV3 corresponds to a textile load of between 3 and and 4 kilos
  • a fourth CV4 family corresponds to a textile load of between 4 and 5 kilos.
  • the sensors for measuring weight and conductivity described above and the selection buttons are connected to the input of a control circuit including in particular a micro processor adapted to implement from the different parameters measured the washing process.
  • This micro processor is particularly adapted to control the speed of rotation of the drum, the operation of the heating elements, the duration and succession of the different phases of washing, rinsing and wringing in the washing process, the feeding and the evacuation of the different washing or rinsing baths ...
  • This control circuit is preferably integrated on an electronic card placed at the control panel 14.
  • the servo-control method according to the invention is adapted to enslave the value of at least one parameter of the washing process according to at least the type and / or the amount of detergent used in the washing process. .
  • the number of rinsing phases in a conventional program may be different, and in particular greater than three.
  • the number of rinsing phases can be further determined by the control method itself.
  • the detergent in a washing process is generally introduced by the user at the beginning of the process, either directly into the drum 13 containing the laundry, or into a receiving tray provided for this purpose.
  • the determination of the type of detergent can be carried out directly by the user using the selector button 15 previously described.
  • this can be done automatically by measuring the conductivity of a detergent bath using the conductivity sensor 16.
  • FIG. 2 illustrates, by way of nonlimiting example, the evolution of the conductivity of a washing bath, as a function of the type of detergent used and of its dosage.
  • the conductivity is measured by a sensor integrated in an oscillator assembly.
  • the frequency generated by this oscillator is proportional to the conductivity of the bath, so that the microprocessor of the electronic board can determine the conductivity of the bath from the frequency, or the period, of the signal measured at the output of the oscillator .
  • FIG. 2 diagrammatically shows the value of the conductivity measured by the sensor immersed in various detergent baths.
  • the signal period is represented as a function of time in seconds.
  • the conductivity increases slightly when the sensor is immersed in water and has a Y value.
  • the value Y of the conductivity of the water of the supply network is taken into account in the control method which will be described.
  • This value is measured and stored during a previous wash cycle during the last rinsing phase.
  • a default value can be further memorized to initialize the process. For example, this default value corresponds to a period of 1700 s.
  • the curve in solid line illustrates the evolution of the conductivity for a detergent in liquid form or gel, in an amount between 50 and 80 ml.
  • the short dashed curve illustrates the change in conductivity for a compacted powder detergent in an amount of 40 g.
  • the dashed line curve illustrates the change in conductivity for a dispersed powder detergent in an amount of about 100 g.
  • the long dotted line curve illustrates the change in conductivity for powdered detergent in an amount greater than 200 g, corresponding in practice to an overdose of the detergent.
  • the evolution of the conductivity thus illustrated corresponds to the beginning of a washing phase of a washing process.
  • the beginning of the washing process can be broken down as follows.
  • a first phase corresponds to filling the tank with water, the drum being stationary.
  • the detergent introduced into the receiving tank is thus entrained in the water of the tank.
  • a second phase corresponds to a mixing phase of water and lye, the drum being rotated so that the water is absorbed by the laundry and the detergent dissolves little by little.
  • a third phase is to add water into the tank, the drum being kept stationary.
  • the drum is also rotated during this fifth phase.
  • a conductivity measurement of the detergent bath can thus be carried out after the stirring phases, and for example after heating the detergent bath, for example at a temperature substantially equal to 30 ° C.
  • the microprocessor implements a step of calculating a ratio of this measured value Y 'of the conductivity of the detergent bath and the predetermined value Y of the conductivity associated with the feed water.
  • a comparison step of this ratio is then implemented according to different predetermined threshold values for classifying detergents.
  • threshold values are dependent on the value measured across the oscillator integrating the conductivity sensor and taken into account by the microprocessor.
  • predetermined threshold values can be calibrated during the manufacture of the machine, by tests and measurement routines accessible to those skilled in the art.
  • the detergent is of the liquid or gel type, hereinafter referred to as DT1.
  • This minimum threshold value is for example equal to 1.2.
  • the detergent used is a compacted powder, hereinafter referred to as DT2.
  • This average threshold value is for example equal to 1.5.
  • the detergent used is a dispersed powder, used at a normal dose of the order of 100 g, hereinafter referred to as DT3.
  • This maximum threshold value is for example equal to 3.5.
  • the detergent used is an overdosed dispersed powder, in an amount greater than for example 150 g, hereinafter referred to as DT4.
  • the method for determining the type of detergent and classification of detergents in the different categories DT1, DT2, DT3, DT4 is given here by way of non-limiting example.
  • the determination process could be refined by taking into account other conductivity measurements of the detergent bath at different times of the washing process, and for example taking into account a conductivity measurement made at the end of the second phase. , after stirring and before the third water booster phase, thus making it possible to discriminate the compacted powders from the dispersed powders as a function of their more or less rapid dissolution in the water.
  • the process for determining the type and amount of detergent is based on the fact that powdered detergents have a richer and more diverse composition than detergents in liquid form.
  • the liquid detergents are diluted regularly with each addition of water unlike detergents in the form of compacted powder which disintegrate before dissolving in the bath.
  • the classification carried out detergents DT1, DT2, DT3, DT4 allows in particular to classify detergents according to their speed of dissolution in water, from the fastest to the slowest.
  • one of the parameters that can be controlled by taking into account the type and / or the amount of detergent is the number of rinsing phases programmed in a washing process.
  • a theoretical washing process is programmed at the microprocessor level, when the user chooses a predefined program.
  • This predefined wash program generally takes into account the type of fabric to be washed, a user-specified wash temperature, and possibly other parameters.
  • control method can be adapted to reduce or increase the number of rinsing phases of the theoretical washing process.
  • the number of rinsing phases can be increased, for example by four, whereas, when the detergent is of the DT1 type, the number of phases of rinsing can be reduced, for example equal to two.
  • the theoretical duration programmed for each rinsing phase can be increased or decreased from the knowledge of the type of detergent used.
  • the servo-control method makes it possible to regulate parameters of an intermediate spin in a textile washing process.
  • an intermediate spinning has different levels of variable duration, corresponding to different speeds of rotation of the drum.
  • the intermediate spinning comprises a first phase of duration D1 for a rotation speed of the drum of the order of 800 revolutions / minute, then a second phase of duration D2 for a speed maximum V rotation drum, shown in Figure 3 at 1050 rpm.
  • the servo-control method thus makes it possible in particular to adjust the values of the parameters D1, D2 and V.
  • the parameter of duration D1 and / or D2 of intermediate spin can be set in the following manner.
  • the duration varies between a minimum threshold value for a washing textile weight of less than 2 kilograms (CV1 load) and a fast dissolving detergent (DT1) and a maximum threshold value for a weight of washing textile greater than 4 kilograms (CV4) and slow dissolving detergent (DT3).
  • the duration D1 can vary from 20 seconds for a load of the type CV1 and a detergent of the type DT1 to 120 seconds for a load of the type CV4 and a detergent of the type DT3.
  • the duration parameter D2 can vary from 20 seconds for a load type CV1 and a detergent type DT1 200 seconds for a CV4-type load and a detergent type DT3.
  • the maximum speed parameter V of rotation of the washing drum can also be regulated by the servo-control method.
  • This rotation parameter V can vary between a minimum threshold value for a weight of textile to be washed less than 2 kilos (type CV1 load) and a fast dissolving detergent (DT1) and a maximum threshold value for a textile weight washing greater than 4 kilograms (CV4 type charge) and slow dissolving detergent (DT3).
  • the speed V can vary from 1050 revolutions / minute for a CV3-type load and a DT3-type detergent at 800 revolutions / minute for a load of the type CV1 and a detergent of the type DT1.
  • the maximum speed can be limited to 800 revolutions / minute for example, to avoid the large creation of foam.
  • the servo-control method can also take into account different periodic measurements of the conductivity of a rinsing bath using the conductivity sensor 16 described above.
  • the method of servocontrol from a periodic measurement of the conductivity of a rinsing bath during a rinsing phase implements a step of comparing the conductivity values measured periodically and successively, in order to determine the end a rinsing phase when at least two consecutive conductivity measurements are substantially identical.
  • the ideal brewing time of a rinsing phase corresponds to the moment when there is a balance between the concentration of detergent in the rinsing bath and that contained in the laundry, any additional extraction of detergent being then impossible.
  • this equilibrium phase results in a conductivity value of the rinsing bath which no longer evolves. Also, by calculating the difference between two successive values of conductivity measurement, with a predetermined periodicity of the order of 1 minute for example, it is possible to determine a rinse phase end when this difference is less than a threshold value. prefixed.
  • This servo-control method thus makes it possible to reduce the theoretical or predetermined duration at the beginning of a washing process as indicated above, to take account of the actual evolution of the rinsing phase.
  • control method is adapted, from the measurement of the conductivity of a rinsing bath during a rinsing phase, to compare the value of the measured conductivity with the predetermined value Y of the conductivity associated with the rinsing phase. feed water, to identify the penultimate rinse required.
  • This test is based on the principle that the higher the conductivity value measured in the rinse bath is close to the Y conductivity value of the feed water, the less detergent is removed from the laundry. By comparing the conductivity of the water in a rinse bath at the end of each rinse phase, it is possible to determine whether the next rinse can be the last rinse.
  • a last rinsing phase is used, during which a softener may optionally be introduced.
  • This servo-control method also serves to control the number of theoretical or predetermined rinse phases at the beginning of the washing process as indicated above.
  • the present invention thus makes it possible, by measuring the conductivity of the rinsing and washing baths throughout a washing process, to control various parameters of this washing process in order, in particular, to limit the mechanical stresses on the laundry and to limit the acoustic nuisance.
  • the invention has been described for a washing machine. It can also be applied to a dishwasher, the servo process being adapted to adjust for example the duration of the washing phase or the number and duration of the rinsing phases depending on the type and / or quantity of detergent used.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP06290510.4A 2005-04-01 2006-03-31 Verfahren zum steuern eines oder mehrerer parameter eines waschvorgangs und maschine für ein derartiges verfahren Active EP1707663B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0503232A FR2883890B1 (fr) 2005-04-01 2005-04-01 Procede d'asservissement d'un ou plusieurs parametres d'un processus de lavage et machine mettant en oeuvre un tel procede d'asservissement

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EP1707663A1 true EP1707663A1 (de) 2006-10-04
EP1707663B1 EP1707663B1 (de) 2016-11-23

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EP (1) EP1707663B1 (de)
ES (1) ES2615506T3 (de)
FR (1) FR2883890B1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2243416A1 (de) * 2009-04-24 2010-10-27 Electrolux Home Products Corporation N.V. Verfahren zum Betreiben eines Geschirrspülers
EP2602380A1 (de) * 2011-12-08 2013-06-12 Samsung Electronics Co., Ltd Waschmaschine mit Leitfähigkeitssensor und Verfahren zur Steuerung des Spülzyklus
EP2644079A1 (de) * 2012-03-30 2013-10-02 Electrolux Home Products Corporation N.V. Waschmittel mit Trübheitssensorerkennung
WO2015197108A1 (en) * 2014-06-24 2015-12-30 Electrolux Appliances Aktiebolag Method for operating a washing appliance and washing appliance
WO2015197109A1 (en) 2014-06-24 2015-12-30 Electrolux Appliances Aktiebolag Method for operating a washing appliance and washing appliance
US10508374B2 (en) 2014-06-24 2019-12-17 Electrolux Appliances Aktiebolag Method for operating a laundry washing appliance and laundry washing appliance implementing the same
US11225746B2 (en) 2018-08-27 2022-01-18 Ecolab Usa Inc. System and technique for extracting particulate-containing liquid samples without filtration

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Publication number Priority date Publication date Assignee Title
KR101692719B1 (ko) 2008-04-30 2017-01-04 엘지전자 주식회사 세탁장치의 제어방법

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US8778090B2 (en) 2009-04-24 2014-07-15 Electrolux Home Products Corporation N.V. Method for operating a dishwasher
EP2508113A1 (de) * 2009-04-24 2012-10-10 Electrolux Home Products Corporation N.V. Verfahren zum Betreiben eines Geschirrspülers
US20120037187A1 (en) * 2009-04-24 2012-02-16 Electrolux Home Products Corporation N.V. Method for operating a dishwasher
CN102413752A (zh) * 2009-04-24 2012-04-11 伊莱克斯家用产品股份有限公司 洗碗机的运行方法
EP2243416A1 (de) * 2009-04-24 2010-10-27 Electrolux Home Products Corporation N.V. Verfahren zum Betreiben eines Geschirrspülers
WO2010121836A1 (en) * 2009-04-24 2010-10-28 Electrolux Home Products Corporation N.V. Method for operating a dishwasher
EP2602380A1 (de) * 2011-12-08 2013-06-12 Samsung Electronics Co., Ltd Waschmaschine mit Leitfähigkeitssensor und Verfahren zur Steuerung des Spülzyklus
EP2644079A1 (de) * 2012-03-30 2013-10-02 Electrolux Home Products Corporation N.V. Waschmittel mit Trübheitssensorerkennung
WO2013144381A1 (en) * 2012-03-30 2013-10-03 Electrolux Home Products Corporation N.V. Turbidity sensor detecting detergent
WO2015197108A1 (en) * 2014-06-24 2015-12-30 Electrolux Appliances Aktiebolag Method for operating a washing appliance and washing appliance
WO2015197109A1 (en) 2014-06-24 2015-12-30 Electrolux Appliances Aktiebolag Method for operating a washing appliance and washing appliance
US10400377B2 (en) 2014-06-24 2019-09-03 Electrolux Appliances Aktiebolag Method for operating a washing appliance and washing appliance
US10508374B2 (en) 2014-06-24 2019-12-17 Electrolux Appliances Aktiebolag Method for operating a laundry washing appliance and laundry washing appliance implementing the same
US10508375B2 (en) 2014-06-24 2019-12-17 Electrolux Appliances Aktiebolag Method for operating a washing appliance and washing appliance
US11225746B2 (en) 2018-08-27 2022-01-18 Ecolab Usa Inc. System and technique for extracting particulate-containing liquid samples without filtration
US11739460B2 (en) 2018-08-27 2023-08-29 Ecolab Usa Inc. System and technique for extracting particulate-containing liquid samples without filtration

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EP1707663B1 (de) 2016-11-23
FR2883890B1 (fr) 2007-06-08
FR2883890A1 (fr) 2006-10-06
ES2615506T3 (es) 2017-06-07

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