EP2185763B1 - Verfahren zum beseitigen von schaum in einer trommelwaschmaschine und hierzu geeignete trommelwaschmaschine - Google Patents

Verfahren zum beseitigen von schaum in einer trommelwaschmaschine und hierzu geeignete trommelwaschmaschine Download PDF

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Publication number
EP2185763B1
EP2185763B1 EP08774906A EP08774906A EP2185763B1 EP 2185763 B1 EP2185763 B1 EP 2185763B1 EP 08774906 A EP08774906 A EP 08774906A EP 08774906 A EP08774906 A EP 08774906A EP 2185763 B1 EP2185763 B1 EP 2185763B1
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EP
European Patent Office
Prior art keywords
drum
foam
rotational speed
level
hydrostatic pressure
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.)
Active
Application number
EP08774906A
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German (de)
English (en)
French (fr)
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EP2185763A1 (de
Inventor
Ingo Schulze
Torsten Hasse
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.)
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Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Priority to PL08774906T priority Critical patent/PL2185763T3/pl
Publication of EP2185763A1 publication Critical patent/EP2185763A1/de
Application granted granted Critical
Publication of EP2185763B1 publication Critical patent/EP2185763B1/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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/06—Arrangements for preventing or destroying scum
    • 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 removing foam in a drum washing machine and a drum washing machine suitable for this purpose.
  • the invention relates to a method for removing existing foam in a tub of a drum washing machine with a program control for controlling a program sequence comprising a sequence of steps comprising adding water and rotating the drum and a drum washing machine suitable therefor.
  • the foam is destroyed by switching on a heater.
  • the drum In order to destroy the foam in the wider vicinity of the heater, the drum is rotated slowly so that more foam passes to the heater and is destroyed there by supplying heat.
  • the DE 102 34 472 A1 describes a method for removing foam in a tub of an electronically controlled drum washing machine as a result of a program step, which is provided for dehydrating the tub, with a arranged at the bottom of the tub lye drain system with a drain pump and with a sensor for determining the height of the liquid in the tub.
  • the course of the sensor signal (P) is recorded during the operation of the drain pump, contains a gradient Ap n / .DELTA.t n compared to Ap n-1 / .DELTA.t n-1, indicating the presence of foam, whereupon one of the Gradient-matched foam treatment measure is initiated, for example, supplying a certain amount of water or changing the speed of the laundry drum.
  • the EP 1 063 341 A2 describes a washing machine with a tub and a rotatable washing zone, which has a detection device for determining the state of the wash liquor and the output of a signal and a control device for receiving this signal and for issuing predetermined commands for the washing of textiles.
  • a detection device for determining the state of the wash liquor and the output of a signal
  • a control device for receiving this signal and for issuing predetermined commands for the washing of textiles.
  • One such condition is a so-called “suds lock", a foam barrier. This results in a pronounced foaming a large tensile force on the drum, which leads to a significant decrease in the rotational speed of the drum. The operation of the washing machine should then be adjusted.
  • the EP 0 268 155 A2 describes a program-controlled washing machine with a drum in a tub, from which the washing and rinsing is discharged by means disposed in a drain line drain pump, wherein the drain line a pipe is connected to a sensor whose output signals an indication of the foaming during the spin process are and constitute control variables for the drive motor of the laundry drum and thus for the control of the spin speed. For example, the spin speed is reduced until the foam limit falls below again.
  • the EP 0 724 036 A1 describes a washing and drying machine for clothes equipped with a foam reducing arrangement.
  • the machine comprises a tub and a rotatably mounted drum therein a pressure sensor and processing and control means which receive the signal of the pressure sensor as a measure of the pressure in an air chamber and periodically reproduce its mean value.
  • a predetermined foaming control washing program is modified.
  • the modification may consist in a reduction in the rotational speed of the drum or an addition of a larger amount of water in at least one rinsing phase.
  • the foam is usually removed by means of adapted rinsing baths with the greatest possible avoidance of the introduction of mechanical energy (for example due to long downtimes of the drum).
  • a disadvantage of the known methods is that they sometimes lead to a considerable lengthening of the overall washing program, greatly increased water consumption and a poor spinning result.
  • the object of the invention was therefore the. To provide a method by which the foam produced in a washing machine can be combated more effectively than with conventional methods. In addition, it was an object of the invention to provide a drum washing machine suitable for carrying out this method.
  • the present invention is therefore a method for removing detected foam in a drum washing machine with a program control for controlling a program flow, a rotatably mounted in a tub drum, a water inlet system, arranged at the bottom of the tub lye drain system with a drain pump, a drive motor for the Drum and a sensor for determining a foam level h s and / or a negative temporal gradient of the foam level (ie s / dt) of a liquid-air mixture in the tub, wherein detected by the sensor foam during a Centrifugal start-up of the drum, ie a continuous or discontinuous increase in the speed of the drum, continuously or discontinuously switched on a small amount of water is added at continuously or discontinuously switched liquor pump, wherein in a spin the foam level h s monitored by the sensor and depending on the foam level h s a Controlled speed of the drum, so that with an increase in the foam level h s, the speed is reduced, while maintaining the foam level h s,
  • the water supply system is generally directed to the laundry located in the drum or into a space between the drum and the tub.
  • a small amount of water is generally added after a successful pumping out of washing liquor, continuously or discontinuously.
  • a quantity of water can be preset depending on the amount of laundry loaded in a drum.
  • a known load detection can be carried out in the drum washing machine. For example, load detection can be performed on the amount of water that has accumulated and, in particular, on a comparison between measured hydrostatic pressures and the amount of water that has been admitted.
  • the maximum foam level h smax is preferably adapted to the amount of laundry in the drum.
  • the senor may be a single sensor or a system of multiple sensors.
  • the term sensor includes besides the actual sensor preferably also a corresponding system for registration and transmission of the data to a program control.
  • the senor is an optical measuring system, a conductometric measuring system, a capacitive measuring system or a pressure measuring system.
  • a pressure measuring system In the event that a pressure measuring system is used, this is preferably also used for the regulation of a water level during a wash and / or rinse cycle.
  • a pressure measuring system As a measure of the foam level h s and / or a negative time gradient of the foam level (ie s / dt) of a liquid-air mixture in the tub, preferably a hydrostatic pressure p and a negative time gradient of the hydrostatic pressure ( dp / dt) of a liquid-air mixture in the tub.
  • the continuous amount of water is 0.5 to 1.5 l / min. In a preferred alternative embodiment, the discontinuously tapered amount of water is 0.2 to 2 l in each case.
  • the slow rotation of the drum is preferably carried out at a speed in the range of 10 to 40 revolutions per minute, for example, at 35 revolutions per minute.
  • the negative temporal gradient of the hydrostatic pressure (-dp / dt) is advantageously measured in step A).
  • the presence of a liquid-air mixture (foam) generally manifests itself in a plot of hydrostatic pressure p versus time t during pump down by a more or less pronounced kink which indicates a decrease in the negative time gradient of hydrostatic pressure (-dp / dt).
  • the predetermined amount of water .DELTA.V i and / or .DELTA.V j is adapted to a loading of the drum with laundry.
  • the predetermined amount of water ⁇ V i and / or ⁇ V j is 0.5 to 2 liters.
  • the amounts of water ⁇ V i and ⁇ V j may be the same or different.
  • the amounts of water ⁇ V i and ⁇ V j are set so that both are equal.
  • the low speed U 1 is preferably in the range of 15 to 45 revolutions per minute.
  • the speed U 2 is at least 100 revolutions per minute.
  • steps C2) and C3) are preferably carried out simultaneously.
  • step F at a pressure p ⁇ p 2, the rotational speed U of the drum is increased until reaching a predetermined maximum rotational speed U max , which is preferably in the range from 900 to 1100 revolutions per minute.
  • the increase in speed can be gradual or in one or more stages.
  • the time intervals ⁇ t 1 and ⁇ t 2 may be the same or different. Preferably, they are the same.
  • a foam detection can be carried out.
  • foam liquid-air mixture
  • Foam detection can also be carried out by means of a conductivity measurement with two electrodes in the lower region of the tub.
  • a foam detection during spinning by means of an evaluation of the target / actual speed difference is possible.
  • the foam detection by evaluation of the target / lst speed difference the fact is exploited that the foam can brake a rotating drum, whereby there is a difference between the target and the actual speed.
  • the association between a specific foam concentration and the target / difference is generally stored in a data memory of the drum washing machine.
  • the invention also relates to a drum washing machine with a program control for controlling a program sequence, a drum rotatably mounted in a tub, a water supply system, a liquor drain system arranged at the bottom of the tub with a drain pump, a drive motor for the drum, a sensor for determining a foam level h s and / or a negative temporal Gradients (ie, s / dt) of a liquid-air mixture in the tub, and switching means for rotating, accelerating, decelerating and / or stopping the drum, wherein the switching means can perform the method of the invention described above.
  • the drum washing machine according to the invention preferably also has a heating device.
  • the method and drum washing machine of the present invention enable rapid and efficient foam removal. Generally, any foam that has been ejected is not applied to the laundry again. When using reduced amounts of water, the invention makes it possible to avoid residual foam on the laundry and the cuff. In this case, the invention makes possible an automatic adaptation of the foam removal measure to the actual formation of foam.
  • FIG. 1 is a schematic representation of the relevant parts of a drum washing machine according to the invention, in which a method according to the invention for the removal of foam can be carried out.
  • FIG. 1 is a schematic representation of the relevant parts of a drum washing machine according to the invention, in which a method according to the invention for the removal of foam can be carried out.
  • Other embodiments are conceivable.
  • the drum washing machine of in FIG. 1 embodiment shown has a tub 1, in which a drum 2 is rotatably mounted and driven by the drive motor 14.
  • the rotational axis 3 of the drum 2 is directed from the horizontal by a small angle (eg 13 °) forwardly upwards, so that the user of the drum washing machine has easier access and insight into the interior of the drum 2.
  • the drum 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 Why Surprise ("Ein Hamptonschale") 11, from the Inlet water can transport detergent portions into the tub.
  • a heater 13 in the tub 1, a heater 13.
  • the valve 9 as well as the heater 13 can be controlled by a control device (“program control”) 12 in response to a program flowchart of a time program and / or the achievement of certain measurements of Parameters such as liquor level, liquor temperature, speed of the drum, etc. may be bound within the drum washing machine.
  • 15 means a sensor for measuring the hydrostatic pressure or its negative time gradient in the tub 1.16 means a drain pump for pumping out the wash liquor.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP08774906A 2007-08-01 2008-07-09 Verfahren zum beseitigen von schaum in einer trommelwaschmaschine und hierzu geeignete trommelwaschmaschine Active EP2185763B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08774906T PL2185763T3 (pl) 2007-08-01 2008-07-09 Sposób usuwania piany w pralce bębnowej i dostosowana do tego pralka bębnowa

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007036041A DE102007036041A1 (de) 2007-08-01 2007-08-01 Verfahren zum Beseitigen von Schaum in einer Trommelwaschmaschine und hierzu geeignete Trommelwaschmaschine
PCT/EP2008/058900 WO2009016009A1 (de) 2007-08-01 2008-07-09 Verfahren zum beseitigen von schaum in einer trommelwaschmaschine und hierzu geeignete trommelwaschmaschine

Publications (2)

Publication Number Publication Date
EP2185763A1 EP2185763A1 (de) 2010-05-19
EP2185763B1 true EP2185763B1 (de) 2012-11-28

Family

ID=39929576

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08774906A Active EP2185763B1 (de) 2007-08-01 2008-07-09 Verfahren zum beseitigen von schaum in einer trommelwaschmaschine und hierzu geeignete trommelwaschmaschine

Country Status (7)

Country Link
US (1) US8510887B2 (pl)
EP (1) EP2185763B1 (pl)
CN (1) CN101772600B (pl)
DE (1) DE102007036041A1 (pl)
EA (1) EA017259B1 (pl)
PL (1) PL2185763T3 (pl)
WO (1) WO2009016009A1 (pl)

Families Citing this family (22)

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ES2367639T3 (es) * 2009-07-09 2011-11-07 MIELE & CIE. KG Lavadora con un dispositivo para evitar la salida de espuma.
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
TR201101412A2 (tr) 2011-02-15 2011-09-21 Vestel Beyaz Eşya Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇@ Çamaşır yıkama makineleri için köpük tespit etme ve giderme yöntemi.
WO2013001681A1 (ja) * 2011-06-29 2013-01-03 パナソニック株式会社 ドラム式洗濯機
JP5903649B2 (ja) * 2011-06-29 2016-04-13 パナソニックＩｐマネジメント株式会社 ドラム式洗濯機
JP5787777B2 (ja) * 2012-01-18 2015-09-30 シャープ株式会社 洗濯乾燥機
CN102644181A (zh) * 2012-05-22 2012-08-22 江苏新安电器有限公司 一种滚筒洗衣机的消泡装置及其方法
DE102013216743A1 (de) * 2013-08-23 2015-02-26 BSH Bosch und Siemens Hausgeräte GmbH Wäschepflegegerät
EP2848726B1 (en) * 2013-09-11 2019-03-27 Electrolux Appliances Aktiebolag A method for operating a washing machine
EP2849008B1 (en) * 2013-09-11 2019-04-03 Electrolux Appliances Aktiebolag Foam-reducing procedure in a washing machine during a spinning cycle
EP2849007B1 (en) 2013-09-11 2020-11-11 Electrolux Appliances Aktiebolag A method for controlling a washing machine during a washing cycle
US10043987B2 (en) 2014-09-29 2018-08-07 Universal Display Corporation Organic electroluminescent materials and devices
US9871212B2 (en) 2014-11-14 2018-01-16 Universal Display Corporation Organic electroluminescent materials and devices
DE102015205945A1 (de) * 2015-04-01 2016-10-06 BSH Hausgeräte GmbH Verfahren zum Betrieb einer Waschmaschine mit Schaumdetektion durch eine Trommeldrehzahlauswertung sowie hierzu geeignete Waschmaschine
DE102016204347A1 (de) * 2016-03-16 2017-09-21 BSH Hausgeräte GmbH Verfahren zum Betrieb eines wasserführenden Haushaltsgeräts mit verbessertem Pumpbetrieb
EP3235939B1 (en) * 2016-04-21 2021-06-09 Electrolux Appliances Aktiebolag Method for the detection of foam in a laundry washing machine
US10072962B2 (en) 2016-07-05 2018-09-11 Ecolab Usa Inc. Liquid out-of-product alarm system and method
EP3318670A1 (en) * 2016-11-08 2018-05-09 BSH Hausgeräte GmbH Process for the operation of a washing machine with foam detection and washing machine suitable for this process
EP3382083A1 (en) 2017-03-27 2018-10-03 Vestel Elektronik Sanayi ve Ticaret A.S. Method for determining foam in a washing machine
CN108978114B (zh) * 2017-06-01 2021-11-26 上海海尔洗涤电器有限公司 洗衣机的泡沫检测方法
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CN110946540B (zh) * 2018-09-27 2023-05-26 合肥海尔洗衣机有限公司 洗鞋机及其控制方法

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Also Published As

Publication number Publication date
EA017259B1 (ru) 2012-11-30
CN101772600A (zh) 2010-07-07
CN101772600B (zh) 2012-05-30
EA201070210A1 (ru) 2010-08-30
PL2185763T3 (pl) 2013-04-30
WO2009016009A1 (de) 2009-02-05
EP2185763A1 (de) 2010-05-19
US8510887B2 (en) 2013-08-20
DE102007036041A1 (de) 2009-02-05
US20100199440A1 (en) 2010-08-12

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