EP1932960A2 - Procédé de commande d'un lave-linge - Google Patents

Procédé de commande d'un lave-linge Download PDF

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Publication number
EP1932960A2
EP1932960A2 EP07023797A EP07023797A EP1932960A2 EP 1932960 A2 EP1932960 A2 EP 1932960A2 EP 07023797 A EP07023797 A EP 07023797A EP 07023797 A EP07023797 A EP 07023797A EP 1932960 A2 EP1932960 A2 EP 1932960A2
Authority
EP
European Patent Office
Prior art keywords
water
conductivity sensor
pump
surrounded
drum
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
EP07023797A
Other languages
German (de)
English (en)
Other versions
EP1932960A3 (fr
EP1932960B1 (fr
Inventor
Rainer Münzner
Kay Schmidt
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Geratebau 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 EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Publication of EP1932960A2 publication Critical patent/EP1932960A2/fr
Publication of EP1932960A3 publication Critical patent/EP1932960A3/fr
Application granted granted Critical
Publication of EP1932960B1 publication Critical patent/EP1932960B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/087—Water level measuring or regulating devices
    • 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
    • D06F33/42—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of draining
    • 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
    • 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
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
    • D06F2105/48—Drum speed
    • 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
    • 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

Definitions

  • the invention relates to a method for controlling the operation of a washing machine, wherein a conductivity sensor is arranged in a tub of the washing machine.
  • the invention has for its object to provide an aforementioned method with which the functionality of a washing process or operating method of a washing machine or the evaluation of an aforementioned conductivity sensor can be improved.
  • the water level is detected by the conductivity sensor and, if the water level is lower than the arrangement of the conductivity sensor, emptying of the tub is stopped, so in particular pumping with a pump.
  • emptying of the pump can be prevented with completely empty pumped tub, which on the one hand avoids unnecessary energy consumption and on the other hand, especially in those phases in which the drum does not rotate, avoids unpleasant audible noise.
  • the switching off of the pump takes place after the fall of the water level below the conductance only after a few seconds delay.
  • a delay may in particular be adjusted to the fact that the water level at Although normal pumping power is lowered a little further below the conductivity sensor, however, an idling of the pump or a suction of air at the pump is avoided.
  • This ensures that operation of the pump takes place close to an area which is considered optimal, ie emptying the tub or lowering the water level to just above the pump.
  • the pump can also be switched off when the water level is below it. It is important to be able to determine where the water level is relative to the pump to avoid possible noises.
  • the conductivity sensor is designed to detect during the washing process whether it is surrounded by foam. In particular, this can be detected not only by the conductivity sensor itself, but also in cooperation with the control of the washing machine or a controller for the conductivity sensor. As a countermeasure to reduce or eliminate the foam, fresh water is added. Thus, the foam or the liquor is at least diluted and foam removed as possible. Detection of foam on the conductivity sensor is thus possible with good security within the scope of the invention. In the case of capacitive conductivity sensors in particular, measured values for this foam state at the conductivity sensor are between those for air and those in the event that the conductivity sensor is surrounded by water.
  • the surface tension of liquor in the drum or in the liquor can be detected by the conductance sensor by detecting the ion concentration in the liquor. Based on this, it can be determined whether a certain surface tension has been exceeded and rinsing of the laundry can be ended. It can in fact be detected in this way, so to speak, whether the detergent has already been rinsed sufficiently from the laundry. For example, depending on the detected ion concentration, the length and / or the number of rinses can be adjusted. In particular, this is done until the ion concentration or the surface tension has exceeded a certain predetermined value and thus the laundry is considered sufficiently rinsed.
  • the spin speed can then be increased slowly until the conductivity sensor is again surrounded predominantly or always by water. This can be repeated several times or the spin speed can be increased more and more. This slow increase of the spin speed unnecessarily early or fast spinning of the drum is avoided with the associated energy consumption and bearing wear.
  • a period of a few seconds is waited between a state change at the conductivity sensor, ie between the state of the predominantly surrounded by water and the state of the predominantly exposed Leitwertsensors, and a pump on or off, as already above has been described.
  • This time span can be, for example in the range between 5 and 30 seconds, in particular between 10 and 20 seconds.
  • this short period of time is provided for the purpose of further pumping off water as the pump continues to run until shortly before the pump runs empty.
  • the pump is stopped and the water rises, it waits until the water level has risen a bit above the conductance sensor, but has not yet returned to the laundry. This reduces the switching frequency at the pump.
  • a speed of the drum can be reduced if foam is detected at the conductivity sensor. Reducing the rotational speed of the drum is a countermeasure for reducing foaming since the foam is then impacted less or no further from the drum passing therethrough. For example, reducing the speed may be 10% to 30%. In particular, the speed can be reduced slowly or in stages until the conductivity sensor is no longer surrounded by foam. It may even be possible that the drum is stopped completely if the conductivity sensor is still surrounded by foam. Particularly advantageously, it is possible to wait a few minutes after stopping the drum, for example, up to five minutes.
  • the conductivity sensor is then still surrounded by foam or if it detects foam, then, as a further countermeasure, fresh water can be introduced in order to wash away the foam. After introducing the fresh water with a certain amount or for a certain time, it is again checked whether the conductivity sensor is surrounded by foam. If this is the case, fresh water can be added again until the foam has been removed.
  • the pump can be started. Namely, if it runs empty, which can easily be detected, for example, by measuring the power consumption of the pump, and this takes some Seconds to a few minutes, then there is actually foam on the conductivity sensor.
  • a washing or rinsing process in particular also a spinning process, in a method for operating an aforementioned conductivity sensor or in measuring the conductivity in the tub or in the liquor the conductance of the conductivity measurement.
  • the drum is stopped until it comes to a standstill and then conductance measurement is carried out with the drum stationary. This avoids that the liquor is hit by the drum movement in the tub or beaten until foaming.
  • the water in the tub can calm down, which also allows a better and safer evaluation of the conductivity sensor.
  • a washing machine according to an embodiment of the invention is shown with a drum 13, in which laundry 14 is located.
  • the drum 13 is driven by the motor 15 with a belt drive.
  • a tub 17 is provided below the drum 13 and surrounds it and has an outlet 18.
  • This drain 18 leads to a pump 20, which conveys water from the tub 17 via a drain hose 21 from the washing machine 11.
  • a heater 23 to warm up therein water or fleet.
  • a feed for fresh water as well as for the detergent added water may be designed as in the prior art.
  • a Leitwertsensor 24 protrudes into the tub 17, in the illustrated embodiment, close to the heater 23, as for example from the DE 10 2005 007 935 is known.
  • the conductivity sensor 24 defines, so to speak, a level 25 shown in dashed lines, which marks the height up to which it can detect water or foam. This will be explained below discussed in more detail.
  • the conductivity sensor 24 is connected to a controller 26, which may additionally also be connected to the pump 20 and / or the heater 23, in particular for their control or also for the evaluation of their operating state.
  • the motor 15 may be connected to the controller 26, both of which are controlled by this and in addition or alternatively to detect its operating state as described above.
  • the conductance sensor 24 may determine whether water or foam is above or below the level 25, or whether it is immersed in water itself. This may be decisive, in particular, for the pumping operation described above.
  • the conductivity sensor 24 is located at the level 25 a whole distance below the lowest point of the drum 13. Thus, a water level, the conductivity sensor 24 and the level 25 exceed a good deal, without getting to the drum 13 and the laundry 14 therein and make them wet again.
  • Fig. 2 It is shown how to determine the surface tension of the liquor in which the contents of the drum 13, in particular the laundry 14, based on the surfactant concentration, can measure. Namely, there is a fixed relationship between these, from which in particular the controller 26 can draw the above conclusions.
  • the conductance and the surfactant concentration are related to each other as shown in FIG Fig. 3 is shown.
  • controller 26 advantageously forms the entire control for the washing machine 11, it knows the respective program sequence and, therefore, of course also knows whether a washing process or a rinsing process is currently taking place.
  • the exact nature of the particular surfactant present need not necessarily be known since, starting from a starting value for any desired surfactant, the change in concentration can be recognized. This is sufficient for the aforementioned optimization of the washing and rinsing operations.
  • different courses can be used accordingly Fig. 4 be stored in the controller 26 and used for detection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP07023797.9A 2006-12-14 2007-12-07 Procédé de commande d'un lave-linge Not-in-force EP1932960B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006060256A DE102006060256A1 (de) 2006-12-14 2006-12-14 Verfahren zur Steuerung einer Waschmaschine

Publications (3)

Publication Number Publication Date
EP1932960A2 true EP1932960A2 (fr) 2008-06-18
EP1932960A3 EP1932960A3 (fr) 2010-09-15
EP1932960B1 EP1932960B1 (fr) 2017-04-05

Family

ID=39271532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07023797.9A Not-in-force EP1932960B1 (fr) 2006-12-14 2007-12-07 Procédé de commande d'un lave-linge

Country Status (7)

Country Link
US (1) US20080141465A1 (fr)
EP (1) EP1932960B1 (fr)
JP (1) JP5043619B2 (fr)
CN (1) CN101220551A (fr)
DE (1) DE102006060256A1 (fr)
ES (1) ES2628041T3 (fr)
RU (1) RU2430204C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012222196A1 (de) 2012-12-04 2014-01-02 E.G.O. Elektro-Gerätebau GmbH Sensoreinrichtung und Elektrohaushaltsgerät mit einer solchen Sensoreinrichtung

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KR101448626B1 (ko) 2007-12-31 2014-10-08 엘지전자 주식회사 세탁기의 제어방법
KR20120008554A (ko) * 2010-07-17 2012-01-31 삼성전자주식회사 세탁기의 제어 방법 및 세탁기
EP2885451B1 (fr) 2012-08-20 2021-03-31 Pellerin Milnor Corporation Procédé de lavage d'articles de tissu dans une machine à laver en tunnel
DE102015204537A1 (de) * 2015-03-13 2016-09-15 BSH Hausgeräte GmbH Verfahren zum Betrieb einer Waschmaschine mit verbesserter Spülphase sowie hierzu geeignete Waschmaschine
DE102015204536A1 (de) * 2015-03-13 2016-09-15 BSH Hausgeräte GmbH Verfahren zum Betrieb einer Waschmaschine mit einem Impedanzsensor sowie hierzu geeignete Waschmaschine
DE102015204540A1 (de) * 2015-03-13 2016-09-15 BSH Hausgeräte GmbH Verfahren zum Betrieb einer Waschmaschine mit einem elektrochemischen Sensor sowie hierzu geeignete Waschmaschine
US9840803B2 (en) 2015-10-20 2017-12-12 Haier Us Appliance Solutions, Inc. Pump assembly for appliance
CN108978119B (zh) * 2017-06-01 2022-05-06 青岛海尔洗衣机有限公司 洗衣机脱水方法
CN109355866B (zh) * 2018-11-19 2022-05-13 青岛海尔洗涤电器有限公司 一种洗衣机
JP6966494B2 (ja) * 2019-02-25 2021-11-17 日立グローバルライフソリューションズ株式会社 洗濯機
DE102019207080B4 (de) * 2019-05-15 2021-04-01 E.G.O. Elektro-Gerätebau GmbH Verfahren zur Untersuchung einer Flüssigkeit und wasserführendes Haushaltsgerät
DE102019207081B4 (de) * 2019-05-15 2021-03-25 E.G.O. Elektro-Gerätebau GmbH Verfahren zur Untersuchung einer Flüssigkeit und wasserführendes Haushaltsgerät
CN111020973A (zh) * 2019-12-02 2020-04-17 珠海格力电器股份有限公司 一种滚筒洗衣机泡沫自清洗控制方法、计算机可读存储介质及洗衣机
DE102019219054B3 (de) * 2019-12-06 2021-02-11 E.G.O. Elektro-Gerätebau GmbH Wasserführendes Haushaltsgerät und Verfahren zum Betrieb eines solchen wasserführenden Haushaltsgeräts
JP2024016745A (ja) * 2022-07-26 2024-02-07 青島海爾洗衣机有限公司 ドラム式洗濯機
US12392070B2 (en) * 2022-09-29 2025-08-19 Haier Us Appliance Solutions, Inc. Systems and methods for drain pump operation in washing machine appliances
US12371836B2 (en) * 2022-09-29 2025-07-29 Haier Us Appliance Solutions, Inc. Systems and methods for failure detection of a pressure sensor in washing machine appliances

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DE102005007935A1 (de) 2005-02-15 2006-08-24 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung für ein Elektrogerät

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EP0633342A1 (fr) 1993-07-06 1995-01-11 Whirlpool Europe B.V. Procédé et dispositif pour optimiser automatiquement la quantité de détergent dans une machine à laver, une machine à laver et à sècher, un lave vaisselle ou similaire en mesurant la dureté de l'eau
DE102005007935A1 (de) 2005-02-15 2006-08-24 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung für ein Elektrogerät

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012222196A1 (de) 2012-12-04 2014-01-02 E.G.O. Elektro-Gerätebau GmbH Sensoreinrichtung und Elektrohaushaltsgerät mit einer solchen Sensoreinrichtung

Also Published As

Publication number Publication date
RU2430204C2 (ru) 2011-09-27
DE102006060256A1 (de) 2008-06-26
EP1932960A3 (fr) 2010-09-15
CN101220551A (zh) 2008-07-16
JP2008149134A (ja) 2008-07-03
JP5043619B2 (ja) 2012-10-10
RU2007146118A (ru) 2009-06-20
US20080141465A1 (en) 2008-06-19
ES2628041T3 (es) 2017-08-01
EP1932960B1 (fr) 2017-04-05

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