EP0992622A2 - Procédé pour surveiller et commander le procédé de rinçage d'une machine à laver et machine à laver fonctionnant selon ce procédé - Google Patents

Procédé pour surveiller et commander le procédé de rinçage d'une machine à laver et machine à laver fonctionnant selon ce procédé Download PDF

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Publication number
EP0992622A2
EP0992622A2 EP99119775A EP99119775A EP0992622A2 EP 0992622 A2 EP0992622 A2 EP 0992622A2 EP 99119775 A EP99119775 A EP 99119775A EP 99119775 A EP99119775 A EP 99119775A EP 0992622 A2 EP0992622 A2 EP 0992622A2
Authority
EP
European Patent Office
Prior art keywords
turbidity
foam
turbidity sensor
rinsing
rinsing liquid
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.)
Withdrawn
Application number
EP99119775A
Other languages
German (de)
English (en)
Other versions
EP0992622A3 (fr
Inventor
Gundula Czyzewski
Ingo Schulze
Christian Engel
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 EP0992622A2 publication Critical patent/EP0992622A2/fr
Publication of EP0992622A3 publication Critical patent/EP0992622A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • D06F33/38—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of rinsing
    • 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
    • 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
    • D06F2103/22—Content of detergent or additives
    • 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
    • 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
    • D06F2105/08—Draining of washing liquids
    • 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
    • D06F2105/52—Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps

Definitions

  • the invention relates to a method for monitoring and controlling the washing process in a laundry treatment machine with a turbidity sensor with which in a measuring range the turbidity sensor, the turbidity of a rinsing liquid can be measured, and the other depending on a turbidity value determined for the rinsing liquid Rinsing process is set, as well as a laundry treatment machine and a turbidity sensor to carry out the procedure.
  • rinsing liquid from a Suds container in circulation is fed to a sample container in which depends on the detergent concentration forms foam.
  • the foam level in the sample container is measured with a transmitted light opacity sensor that detects the sample container in the vertical direction screened.
  • the foam level is always recorded in the same direction of rotation of the laundry machine.
  • the captured Turbidity can therefore be unequivocally assigned to neither the rinsing liquid nor the foam become.
  • a high level of turbidity can also be caused by a very contaminated one Use rinsing liquid.
  • a washing machine with a turbidity sensor is known from EP 393 311 B1 which determine the translucency of the wash liquor and the rinsing liquid can to control the washing and rinsing process.
  • the rinsing process a permissible low level of turbidity is ended, although the detergent concentration is still too high for the storage and use of the laundry items.
  • a turbidity sensor is understood to be an arrangement in which a medium is irradiated with light and based on the ratio of transmitted to shining light the turbidity of the medium is determined.
  • the light can be monochromatic be or have a wide range.
  • the turbidity measurement can be achieved with a light source and a light receiver to which the light beam emitted by the light source falls after passing through the medium.
  • You can Light transmitter and receiver can be arranged opposite in a light barrier.
  • the light beam can also be deflected by mirrors, as when using a reflex light barrier be so that light transmitter and receiver can be freely arranged.
  • the Route between light transmitter and receiver can be chosen arbitrarily and can also extend through the entire tub.
  • the present invention is based on the object of a method and a laundry treatment machine and to create a turbidity sensor of the type mentioned at the outset, with which the most comprehensive monitoring and control possible with little effort of the rinsing process is possible.
  • this object is achieved by a method in which the measurement signal of the turbidity sensor, if there is no rinsing liquid in its measuring range, for detection of foam is used and the further rinsing process also depending on the Result of the foam detection is determined, as well as with a turbidity sensor a measuring range that is designed in such a way that foam sticks particularly well in it, and solved by a laundry treatment machine that has a turbidity sensor the turbidity of a rinsing liquid is measured in a measuring range of the turbidity sensor can be, and has a program control device, which serves, depending a turbidity value determined for the rinsing liquid the further program sequence to determine when there is no rinsing liquid in the measuring range of the turbidity sensor is located, and in this case based on the measurement signal of the turbidity sensor perform a foam detection and the further rinsing process also depending the result of the foam detection.
  • both the turbidity of the rinsing liquid detected as well as a foam detection can be carried out.
  • You can use the The sensor detects turbidity values without doubt either the rinsing liquid or, if necessary existing foam in the measuring range of the sensor can be assigned because the corresponding Measurements are taken at different times. From the additional information Any foam that is present can affect the concentration of detergent be closed in the rinsing liquid. The risk that the rinsing process is inadmissible high detergent content in the rinsing liquid can be reduced become. This can happen especially with detergents that have little rinsing liquid tarnish.
  • This method is used in laundry treatment machines, which anyway are equipped with a turbidity sensor for measuring the rinsing liquid turbidity this method does not require any additional components and can be used especially in electronic Simply retrofit program control devices.
  • Foam detection by means of the turbidity sensor according to the invention can also be carried out several times, using the results obtained the previous rinsing process is monitored and the further rinsing process is optimized. It can monitor how quickly the detergent residues are washed out of the laundry, or whether due to the movement of a laundry mover, for example in the form of a laundry drum Foam is generated.
  • the further rinsing process can be based on this information be optimized accordingly, taking the effect of the measures taken can be checked immediately, which can be reacted to if necessary.
  • the foam detection is advantageously after the drain or pumping Flushing liquid carried out at the end of at least one rinse cycle of the washing process, because there is no more rinsing liquid in the measuring range of the turbidity sensor at this time located.
  • the turbidity sensor can be used for measurement during the drain or pump down process the rinsing liquid turbidity and then used for foam detection. After each rinse, the turbidity of the rinsing liquid is a measure of the load Dirt particles and a measure of foam formation are known, based on the detergent concentration can be closed in the rinsing liquid. Within a rinsing process can be used to check the previous rinse cycle and the following one be optimized.
  • Rinse cycle should be provided to remove any remaining detergent to remove from the laundry.
  • the rinsing effect in the rinse cycles can be increased, for example by increasing the amount of water and / or by intensifying the laundry movement and / or by lengthening of the individual rinse cycles.
  • the measurement signal of the turbidity sensor is advantageously from the time of the expiry or Pumping out the rinsing liquid, to which experience has shown all rinsing liquid expired or pumped out, used for foam detection. At this time can be assumed that there is no more rinsing liquid in the measuring range of the turbidity sensor and it can be used for foam detection. This can be determined using a simple time measurement. Used to control the laundry machine A microprocessor or microcontroller can be used to measure time without any additional component effort with one for program sequence control in usually scheduled timers are performed anyway.
  • the measured turbidity value it is also possible to use the measured turbidity value to determine whether there is no rinsing liquid in the measuring range of the turbidity sensor. This is possible if the rinsing liquid that finally passes through the measuring range of the turbidity sensor, has a different turbidity than possibly entering the measuring range afterwards Foam. In this case, the measured turbidity curve will have a jump, for example if the rinsing liquid flows through the measuring range of the turbidity sensor during the sequence ran through it and the floating foam immediately afterwards gets into the measuring range. This sudden change in the measured turbidity can be evaluated by the control device, which is then measured using the Turbidity performs the foam detection.
  • the velocity can also be determined using a turbidity value measured for foam with which the foam disintegrates. This can, for example, from the speed, with which the turbidity value changes or is determined from the time after who has taken the turbidity back to a value at which it is assumed can that there is no foam in the measuring range of the turbidity sensor. Based This information can be used to draw conclusions about the foam properties that are used in the control of the rinsing process can be taken into account.
  • the method according to the invention can be carried out with any turbidity sensor.
  • the one Measuring section with a light transmitter and a light receiver which has a measuring range forms, which is advantageously designed such that foam in it is particularly good Keeps hanging.
  • This can be achieved by at least partially around the measurement area Limits are arranged between which foam can get stuck.
  • the measuring range can be designed as a narrow slot, as is the case with a fork light barrier the case is. So even small amounts of foam can be reliably recognized, which would otherwise pass through the measuring range too quickly to be reliable To enable foam detection.
  • FIG. 2 show the lower part of a tub 1 of a laundry treatment machine, which in the present case is a washing machine.
  • a drain hose 2 for removing wash liquor or rinsing liquid 7 after connected to the individual wash or rinse cycles.
  • the drain hose 2 leads to a drain pump 3 for pumping out the liquids that are no longer required a drain pipe 4 to which there is a line, not shown, to a waste water connection connects.
  • the drain hose 2 has a straight section above a bellows, with which he is connected to the tub 1 and which consists of transparent material. Both sides of this transparent section of the drain hose 2 are a light transmitter 5 or a light receiver 6 arranged opposite each other. That from Light transmitter 5 emitted light illuminates the transparent section of the drain hose 2 and the medium in this section and falls on the light receiver 6. Light transmitter 5 and light receiver 6 together form a turbidity sensor 5, 6, which is connected to an electronic control device, not shown. The control device evaluates the output signal of the light receiver 6 and determines the light transmission or a turbidity value for the medium in the transparent section of the drain pipe 2. The interior of this transparent section thus forms the Measuring range of the turbidity sensor 5, 6.
  • Fig. 1 and Fig. 2 is the arrangement described above after the pumping process shown at the end of a rinse cycle, the pumping process being ended as soon as the flushing liquid level has fallen below the bellows in the drain hose 2.
  • Fig. 1 the case is shown in which due to a high detergent concentration has formed foam 8 in the washing liquid 7 in the tub 1.
  • the foam 8 After draining the rinsing liquid 7, the foam 8 has run into the drain hose 2, floats on top of the rinsing liquid 7 and extends into the measuring range of the turbidity sensor 5.6.
  • the turbidity curve measured with the turbidity sensor 5, 6 over time t for this case is shown schematically in FIG. 3 by curve A.
  • rinsing liquid 7 flows through the measuring range of the turbidity sensor 5, 6 and is loaded with detergent residues and dirt particles and therefore has a certain turbidity T 1 .
  • time t 0 all the rinsing liquid 7 has passed through the measuring range of the turbidity sensor 5, 6, so that the foam 8 previously floating on the rinsing liquid 7 runs into the measuring range.
  • the foam 8 has a lower light transmittance than the rinsing liquid 7, so that the turbidity rises to the value T 2 at time t 0 , the ratio of the turbidities of rinsing liquid 7 and foam 8 depending on many factors and being completely different can.
  • the foam 8 begins to disintegrate, so that the course of turbidity A at the end drops again to a zero value which corresponds to the turbidity value of air.
  • the duration until time t 0 after which all washing liquid 7 has expired is stored in the control device.
  • the control device evaluates the measured turbidity and, at a turbidity value which is substantially higher than that for air, recognizes that foam 8 is in the measuring range and the detergent concentration in the rinsing liquid is still impermissibly high. As a countermeasure, a further rinse cycle is carried out to rinse out the detergent residues.
  • the turbidity curve over time t for this case is shown schematically by curve B in FIG. 4.
  • the turbidity sensor measures the turbidity T 1 up to the point in time t 0 , at which the entire rinsing liquid 7 is pumped out. Then the upper part of the drain hose and thus the measuring range of the turbidity sensor 5, 6 are filled with inflowing air, the turbidity of which is negligible.
  • the turbidity curve B therefore drops to essentially zero at time t 0 in the exemplary embodiment described.
  • the turbidity value measured for air can depend very strongly on the design of the turbidity sensor 5, 6 used.
  • the measured turbidity value can depend heavily on the arrangement of the windows.
  • the turbidity value measured for air can thus be influenced by the configuration of the turbidity sensor 5, 6.
  • the control device recognizes from this fact that there is no foam 8 in the measuring range and the detergent concentration in the rinsing liquid is below the permissible Value. The rinsing process is then completed and the operating program continues.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP99119775A 1998-10-07 1999-10-06 Procédé pour surveiller et commander le procédé de rinçage d'une machine à laver et machine à laver fonctionnant selon ce procédé Withdrawn EP0992622A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19846248 1998-10-07
DE19846248A DE19846248A1 (de) 1998-10-07 1998-10-07 Verfahren zur Überwachung und Steuerung des Spülprozesses in einer Wäschebehandlungsmaschine sowie nach diesem Verfahren arbeitende Wäschebehandlungsmaschine

Publications (2)

Publication Number Publication Date
EP0992622A2 true EP0992622A2 (fr) 2000-04-12
EP0992622A3 EP0992622A3 (fr) 2002-02-06

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EP99119775A Withdrawn EP0992622A3 (fr) 1998-10-07 1999-10-06 Procédé pour surveiller et commander le procédé de rinçage d'une machine à laver et machine à laver fonctionnant selon ce procédé

Country Status (2)

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EP (1) EP0992622A3 (fr)
DE (1) DE19846248A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7340792B2 (en) 2002-07-29 2008-03-11 Bsh Bosch Und Siemens Haugeraete Gmbh Process for eliminating foam in the lye container of a drum washing machine
US7690061B2 (en) 2005-12-22 2010-04-06 General Electric Company Method and apparatus for controlling a laundering process
WO2011154251A1 (fr) * 2010-06-09 2011-12-15 BSH Bosch und Siemens Hausgeräte GmbH Appareil ménager à circulation d'eau et doté d'un capteur de turbidité
EP2465993A1 (fr) * 2010-12-14 2012-06-20 Whirlpool Corporation Appareil de traitement du linge doté d'un cycle de traitement du biofilm
US8844082B2 (en) 2010-12-14 2014-09-30 Whirlpool Corporation Laundry treating appliance with biofilm treating cycle
DE102015116525A1 (de) 2015-09-29 2017-03-30 Abb Schweiz Ag Messung der Geschwindigkeit eines Gasstroms unter Nutzung von Partikeln
CN110735291A (zh) * 2018-07-20 2020-01-31 青岛海尔洗衣机有限公司 一种浊度检测装置、洗衣机及其控制方法
US11225746B2 (en) 2018-08-27 2022-01-18 Ecolab Usa Inc. System and technique for extracting particulate-containing liquid samples without filtration

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007033492A1 (de) * 2007-07-18 2009-01-22 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zur Steuerung der Schaumerzeugung in einer Waschmaschine sowie hierzu geeignete Waschmaschine
DE102007036041A1 (de) 2007-08-01 2009-02-05 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Beseitigen von Schaum in einer Trommelwaschmaschine und hierzu geeignete Trommelwaschmaschine
DE102007052837A1 (de) * 2007-11-06 2009-05-07 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Behandeln von Waschgut in einer Haushaltswaschmaschine mit einer schaumbildenden Flotte
DE102009027933A1 (de) 2009-07-22 2011-01-27 BSH Bosch und Siemens Hausgeräte GmbH Erkennen von Schaum für eine programmgesteuerte Wäschebehandlungsmaschine
DE102009045433B4 (de) 2009-10-07 2011-09-15 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Behandeln von Schaum, entsprechend programmierte Steuereinrichtung sowie entsprechende Wäschebehandlungsmaschine
CN109487494A (zh) * 2017-09-11 2019-03-19 无锡小天鹅股份有限公司 泡沫的控制方法及洗衣机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4242927A1 (de) * 1992-12-18 1994-06-23 Bauknecht Hausgeraete Optischer Sensor
DE4336520A1 (de) * 1993-10-26 1995-04-27 Siemens Ag Optischer Sensor
DE19626203A1 (de) * 1996-06-29 1998-01-02 Aeg Hausgeraete Gmbh Optischer Sensor
DE19629806A1 (de) * 1996-07-24 1998-01-29 Aeg Hausgeraete Gmbh Wasch- oder Spülmaschine
EP0849390A2 (fr) * 1996-12-18 1998-06-24 Bosch-Siemens HausgerÀ¤te GmbH Machine à laver à tambour avec une conduite de liquide en plusieurs parties
DE19821148A1 (de) * 1998-05-12 1999-11-18 Aeg Hausgeraete Gmbh Programmgesteuertes wasserführendes elektrisches Haushaltsgerät

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4242927A1 (de) * 1992-12-18 1994-06-23 Bauknecht Hausgeraete Optischer Sensor
DE4336520A1 (de) * 1993-10-26 1995-04-27 Siemens Ag Optischer Sensor
DE19626203A1 (de) * 1996-06-29 1998-01-02 Aeg Hausgeraete Gmbh Optischer Sensor
DE19629806A1 (de) * 1996-07-24 1998-01-29 Aeg Hausgeraete Gmbh Wasch- oder Spülmaschine
EP0849390A2 (fr) * 1996-12-18 1998-06-24 Bosch-Siemens HausgerÀ¤te GmbH Machine à laver à tambour avec une conduite de liquide en plusieurs parties
DE19821148A1 (de) * 1998-05-12 1999-11-18 Aeg Hausgeraete Gmbh Programmgesteuertes wasserführendes elektrisches Haushaltsgerät

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7340792B2 (en) 2002-07-29 2008-03-11 Bsh Bosch Und Siemens Haugeraete Gmbh Process for eliminating foam in the lye container of a drum washing machine
US7690061B2 (en) 2005-12-22 2010-04-06 General Electric Company Method and apparatus for controlling a laundering process
WO2011154251A1 (fr) * 2010-06-09 2011-12-15 BSH Bosch und Siemens Hausgeräte GmbH Appareil ménager à circulation d'eau et doté d'un capteur de turbidité
EP2465993A1 (fr) * 2010-12-14 2012-06-20 Whirlpool Corporation Appareil de traitement du linge doté d'un cycle de traitement du biofilm
US8844082B2 (en) 2010-12-14 2014-09-30 Whirlpool Corporation Laundry treating appliance with biofilm treating cycle
DE102015116525A1 (de) 2015-09-29 2017-03-30 Abb Schweiz Ag Messung der Geschwindigkeit eines Gasstroms unter Nutzung von Partikeln
CN110735291A (zh) * 2018-07-20 2020-01-31 青岛海尔洗衣机有限公司 一种浊度检测装置、洗衣机及其控制方法
CN110735291B (zh) * 2018-07-20 2023-07-21 重庆海尔洗衣机有限公司 一种浊度检测装置、洗衣机及其控制方法
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

Also Published As

Publication number Publication date
DE19846248A1 (de) 2000-04-13
EP0992622A3 (fr) 2002-02-06

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