EP0898009A1 - Procédé pour déterminer le chargement d'un sèche -linge - Google Patents

Procédé pour déterminer le chargement d'un sèche -linge Download PDF

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Publication number
EP0898009A1
EP0898009A1 EP98114948A EP98114948A EP0898009A1 EP 0898009 A1 EP0898009 A1 EP 0898009A1 EP 98114948 A EP98114948 A EP 98114948A EP 98114948 A EP98114948 A EP 98114948A EP 0898009 A1 EP0898009 A1 EP 0898009A1
Authority
EP
European Patent Office
Prior art keywords
laundry
determined
conductance
fluctuation range
fluctuation
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
EP98114948A
Other languages
German (de)
English (en)
Other versions
EP0898009B1 (fr
Inventor
Uwe-Jens Dipl.-Ing. Krausch
Ulrich Dipl.-Ing. Nehring
Dietmar Dipl.-Ing. Pech
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 EP0898009A1 publication Critical patent/EP0898009A1/fr
Application granted granted Critical
Publication of EP0898009B1 publication Critical patent/EP0898009B1/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
    • 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
    • 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
    • D06F2103/08—Humidity
    • D06F2103/10—Humidity expressed as capacitance or resistance
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity

Definitions

  • the present invention relates to a method for determining the amount of loading a clothes dryer according to the preamble of claim 1.
  • the drying process plays alongside the moisture and the type of laundry that is usual is dried in a drum, including the load the dryer plays a big role. Therefore, for various reasons, it is about for accurate remaining time prediction, for optimal control of the drying process or for customized heating output, advantageous, the load to determine the dryer.
  • Methods for determining the amount of loading of are from the prior art Washer dryers known, which are based on the evaluation of temperature or temperature gradient measurements, on the current draw of the motor to move the laundry drum or based on a measurement of the electrical capacity of the drum.
  • DE 29 45 696 A1 describes a method for determining the amount of loading known from tumble dryers, in which the electrical conductivity of the laundry is used becomes.
  • two electrodes are attached in the drum, which temporarily touch the laundry when the drum is rotated and by means of which determines the electrical conductivity.
  • This master value signal which with the Movement of laundry in the drum varies and has impulses, is at one Threshold switch connected, which concerns the concern of a piece of laundry itself in a dry state on the electrodes by making a hit signal more constant Returns height, which is then integrated.
  • the more often and the longer a piece of laundry at the electrodes the more frequent and longer the hit signals and the higher the value of the integration of these hit signals.
  • integration poses of these hit signals is a measure of the load of the dryer, which can be used to control the drying process.
  • the threshold value formation with subsequent integration of the hit signals requires one high component and circuit complexity, which is uneconomical and the risk of failure elevated. Furthermore, this method only works if the conductance is at a very high level low value falls, which is still below that which corresponds to the conductivity of dry laundry, so that even minor disturbances in the conductance measurement lead to a faulty one Determine the load quantity. As to the function of this method the certain Conductivity, at least at times, has to assume very low values higher load, where there is always a piece of laundry on the electrodes, not an exact one It is now possible to determine the load quantity.
  • the present invention is therefore based on the object of a method for determination the load of tumble dryers of the type mentioned to be improved in such a way that it can be carried out with little expenditure on components and circuitry is highly insensitive to interference and even at higher loads enables reliable determination of the load.
  • the fluctuation range of the electrical conductivity is for this purpose determined and used as a measure of the load.
  • the tumble dryer is very likely to be on the electrode there is no item of laundry so that there is a large fluctuation range in the conductance sets.
  • the greater the load the less likely it is that there is no laundry on the electrode and the less the fluctuation range of the conductance.
  • This method enables the amount of loading to be determined with little or completely without additional components and circuitry, since it is based on a conductance measurement based in most tumble dryers to determine laundry moisture is implemented anyway. Furthermore, this method enables even with higher loads an exact determination of the loading quantity, since every change of the determined Conductivity is detected without falling below a certain threshold got to. This also results in greater insensitivity to interference.
  • the difference between the maximum and determined the minimum value of the master value within a certain time interval By restricting the determination of the fluctuation range to a time interval the frequency of the fluctuation width values determined can be varied by varying the time interval influence and by increasing the duration of the time interval Reduce the influence of short-term disturbances.
  • the conductance is advantageously measured at periodic intervals and the Fluctuation range of the individual conductance measurements determined.
  • By winning Discrete guide values can easily determine and evaluate the fluctuation range done with digital components.
  • by choosing the measurement period the frequency of the determined guide values and thus the computing effort required for evaluation freely determine depending on the requirements and possibilities.
  • the maximum and minimum values of the conductance are advantageously averaged and the range of fluctuation in each case determines the mean values. Through this averaging the influence of short-term disturbances is reduced and the measuring certainty of the determination of the load increased. In addition, it is also possible to find implausible ones Suppress values such as outliers and disregard them when averaging.
  • the ones obtained Average fluctuation ranges and the fluctuation range mean as a measure of the Load to use. This can reduce the influence of short-term disturbances and the measuring certainty can be increased. In addition, it is also possible here, not plausible recognizing appearing values, such as outliers, and not taking them into account when averaging.
  • FIG. 1 Therein is a schematic circuit structure for performing one Embodiment of the method according to the invention shown.
  • the drum 1 has an electrode 12, wherein the drum 1 itself serves as the second electrode.
  • the drum 1 is connected to the mass 4 of the dryer and the electrode 12 connected to a constant voltage 5 via a series resistor 13.
  • the Laundry in the drum 1 has a laundry resistance 14, on the one hand, via the Drum 1 with the mass 5 of the dryer and on the other hand via the electrode 12 is connected to the resistor 13 and therefore with this one voltage divider forms.
  • a measurement signal 15 is obtained, which is a measure of the laundry conductance serves.
  • This conductance measurement signal is connected to the input of an anti-aliasing low-pass filter 2 connected, the output of which is connected to an analog input of a microcontroller 3 is.
  • the load of the tumble dryer is determined when moving the laundry in the drum 1 by rotating it.
  • the laundry gets at least at times in contact with the electrode 12, which is a time-varying conductivity measurement signal 15 results. Every time the electrode 12 is touched by a piece of laundry or each time the electrode 12 and drum 1 change measured laundry resistance 14, the conductance measurement signal 15 jumps or have an impulse. In cases where no laundry touches the electrode 12, or a piece of laundry touches the electrode very little, and therefore less If the conductance is determined, the conductance measurement signal has a minimum value. At very good electrical connection between the electrode 12 and the laundry is against it the signal 15 have a maximum value.
  • This master value signal is by means of of a microcontroller 3, being used to prevent incorrect measurements Anti-aliasing filter 2 is interposed.
  • the microcontroller 3 now measures periodically Distances the conductance and determined by forming the difference between one Maximum and a minimum value of the master value within a certain time interval the fluctuation range.
  • the microcontroller can use the fluctuation range of the electrical conductivity determine the load of the tumble dryer.
  • the solution according to the invention thus becomes a method for determining the loading quantity of a tumble dryer created with the avoidance of a high Component and circuit expenditure an exact determination even with higher loads the amount of loading is possible and high insensitivity to Disturbances can be achieved.
  • This method can be used particularly advantageously in tumble dryers use in which a microcontroller is used anyway and a conductance measurement the laundry is carried out.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP98114948A 1997-08-21 1998-08-07 Procédé pour déterminer le chargement d'un sèche -linge Expired - Lifetime EP0898009B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19736419 1997-08-21
DE19736419A DE19736419A1 (de) 1997-08-21 1997-08-21 Verfahren zur Bestimmung der Beladungsmenge eines Wäschetrockners

Publications (2)

Publication Number Publication Date
EP0898009A1 true EP0898009A1 (fr) 1999-02-24
EP0898009B1 EP0898009B1 (fr) 2002-05-15

Family

ID=7839740

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98114948A Expired - Lifetime EP0898009B1 (fr) 1997-08-21 1998-08-07 Procédé pour déterminer le chargement d'un sèche -linge

Country Status (3)

Country Link
US (1) US6462564B1 (fr)
EP (1) EP0898009B1 (fr)
DE (2) DE19736419A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1236826A2 (fr) * 2001-03-02 2002-09-04 Whirlpool Corporation Procédé pour changer le programme dans un sèche-linge domestique
EP1295979A2 (fr) * 2001-09-06 2003-03-26 Whirlpool Corporation Procédé pour programmer le lavage, en particulier le séchage dans des dispositifs pour traiter le linge tels que machines à laver, à sécher, à essorer , etc.
EP1939349A2 (fr) * 2006-12-26 2008-07-02 LG Electronics Inc. Machine de blanchisserie et son procédé de commande
EP2730694A1 (fr) * 2012-11-13 2014-05-14 BSH Bosch und Siemens Hausgeräte GmbH Procédé de détermination d'au moins une grandeur caractéristique de pièces de linge, et machine d'entretien du linge correspondante
DE102012221919A1 (de) 2012-11-29 2014-06-05 BSH Bosch und Siemens Hausgeräte GmbH Haushaltsgerät mit einem beleuchtbaren Behandlungsraum
EP2927363A1 (fr) * 2014-03-31 2015-10-07 Electrolux Appliances Aktiebolag Procédé de réalisation d'un cycle de séchage dans une machine de traitement de linge, machine de traitement de linge et unité de commande électronique

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2505565C (fr) * 2005-04-28 2008-09-16 Camco Inc. Dispositif et methode de commande d'un seche-linge
CA2629495A1 (fr) * 2008-04-18 2009-10-18 Mabe Canada Inc. Controleur de secheuse
DE102008025496A1 (de) * 2008-05-28 2009-12-03 BSH Bosch und Siemens Hausgeräte GmbH Messanordnung zur Ermittlung einer Information über die Beladung eines Wäschetrockners

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2945696A1 (de) * 1979-11-13 1981-05-21 Ako-Werke Gmbh & Co., 7988 Wangen Schaltungsanordnung
EP0226209A2 (fr) * 1985-12-16 1987-06-24 Kabushiki Kaisha Toshiba Séchoir
DE4403625A1 (de) * 1994-02-05 1995-08-10 Miele & Cie Wäschetrockner mit einer Vorrichtung zur Ermittlung der Beladungsmenge

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4422247A (en) * 1981-06-29 1983-12-27 Whirlpool Corporation Low voltage sensor for a dryer
US5450015A (en) * 1994-02-24 1995-09-12 Forte Technology, Inc. Apparatus for measuring impedance to determine a property of a material
US5514973A (en) * 1994-07-11 1996-05-07 The United States Of America As Represented By The Secretary Of Agriculture System for analyzing moisture content of materials such as cotton

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2945696A1 (de) * 1979-11-13 1981-05-21 Ako-Werke Gmbh & Co., 7988 Wangen Schaltungsanordnung
EP0226209A2 (fr) * 1985-12-16 1987-06-24 Kabushiki Kaisha Toshiba Séchoir
DE4403625A1 (de) * 1994-02-05 1995-08-10 Miele & Cie Wäschetrockner mit einer Vorrichtung zur Ermittlung der Beladungsmenge

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1236826A2 (fr) * 2001-03-02 2002-09-04 Whirlpool Corporation Procédé pour changer le programme dans un sèche-linge domestique
EP1236826A3 (fr) * 2001-03-02 2003-10-01 Whirlpool Corporation Procédé pour changer le programme dans un sèche-linge domestique
EP1295979A2 (fr) * 2001-09-06 2003-03-26 Whirlpool Corporation Procédé pour programmer le lavage, en particulier le séchage dans des dispositifs pour traiter le linge tels que machines à laver, à sécher, à essorer , etc.
EP1295979A3 (fr) * 2001-09-06 2003-12-10 Whirlpool Corporation Procédé pour programmer le lavage, en particulier le séchage dans des dispositifs pour traiter le linge tels que machines à laver, à sécher, à essorer , etc.
AU2007254689B2 (en) * 2006-12-26 2009-10-08 Lg Electronics Inc. Laundry machine and control method thereof
EP1939349A3 (fr) * 2006-12-26 2009-03-25 LG Electronics Inc. Machine de blanchisserie et son procédé de commande
EP1939349A2 (fr) * 2006-12-26 2008-07-02 LG Electronics Inc. Machine de blanchisserie et son procédé de commande
CN101210375B (zh) * 2006-12-26 2011-09-21 Lg电子株式会社 洗衣机及其控制方法
US8650772B2 (en) 2006-12-26 2014-02-18 Lg Electronics Inc. Laundry machine and control method thereof
EP2730694A1 (fr) * 2012-11-13 2014-05-14 BSH Bosch und Siemens Hausgeräte GmbH Procédé de détermination d'au moins une grandeur caractéristique de pièces de linge, et machine d'entretien du linge correspondante
DE102012220687A1 (de) * 2012-11-13 2014-05-15 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Ermitteln zumindest einer Kenngröße von Wäschestücken, sowie entsprechende Wäschepflegemaschine
DE102012221919A1 (de) 2012-11-29 2014-06-05 BSH Bosch und Siemens Hausgeräte GmbH Haushaltsgerät mit einem beleuchtbaren Behandlungsraum
EP2927363A1 (fr) * 2014-03-31 2015-10-07 Electrolux Appliances Aktiebolag Procédé de réalisation d'un cycle de séchage dans une machine de traitement de linge, machine de traitement de linge et unité de commande électronique

Also Published As

Publication number Publication date
DE19736419A1 (de) 1999-02-25
EP0898009B1 (fr) 2002-05-15
DE59804119D1 (de) 2002-06-20
US6462564B1 (en) 2002-10-08

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