EP1932960B1 - Procédé de commande d'un lave-linge - Google Patents

Procédé de commande d'un lave-linge Download PDF

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Publication number
EP1932960B1
EP1932960B1 EP07023797.9A EP07023797A EP1932960B1 EP 1932960 B1 EP1932960 B1 EP 1932960B1 EP 07023797 A EP07023797 A EP 07023797A EP 1932960 B1 EP1932960 B1 EP 1932960B1
Authority
EP
European Patent Office
Prior art keywords
water
conductance sensor
pump
surrounded
conductance
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.)
Not-in-force
Application number
EP07023797.9A
Other languages
German (de)
English (en)
Other versions
EP1932960A3 (fr
EP1932960A2 (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 (see DE-U-296 11 091 ). It is for example for controlling the operation of a washing machine from the DE 10 2005 007 935 A1 or the EP 633 342 A1 known to provide a conductivity sensor inside, for example, in the lower region of the tub.
  • the measured values of the conductivity sensor are recorded and evaluated by a controller of the washing machine.
  • the possibilities described therein of further processing or utilizing these measured values are limited.
  • 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 has dropped lower than the arrangement of the conductivity sensor, emptying of the tub is stopped, ie 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.
  • an aforementioned pump is provided for emptying the tub, which is why it is advantageous if the switching off of the pump takes place after the fall of the water level under the conductance only after a few seconds delay.
  • Such a delay is tuned to the fact that the water level at normal pumping power is lowered even further below the conductivity sensor, however, avoiding idling of the pump or a suction of air at the pump. 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 is. 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 spin speed only during the spin cycle, in particular with the pump always running, until the conductivity sensor is essentially surrounded by water without interruptions or even constantly. This means that it starts with slow spin speeds, since then with still very wet laundry sufficient water is ejected from the laundry, so that the water level exceeds the conductivity sensor. Since usually the pump capacity is limited or the pump always runs at maximum power, it makes little sense to spin the laundry even faster and throw out even more water, if this can then be removed by the pump in time or fast enough , Furthermore, then the laundry in the drum again and again through the Water are turned down in the tub and wet again, which should just be avoided.
  • 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 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 for carrying out the conductance 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 is recognizable. 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)

Claims (7)

  1. Procédé pour commander le fonctionnement d'une machine à laver (11), un capteur de conductance (24) étant disposé dans une zone inférieure du réservoir à produits lessiviels (17) et les valeurs mesurées du capteur de conductance (24) étant collectées et transmises à une commande (26) de la machine à laver (11), un niveau d'eau qui est devenu plus bas que l'arrangement (25) de capteur de conductance (24) étant détecté et un vidage du réservoir à produits lessiviels (17) étant alors arrêté, caractérisé en ce qu'une pompe (20) est présente pour le vidage du réservoir à produits lessiviels (17) et la mise hors circuit de la pompe (20) s'effectue avec quelques secondes de retard, le retard étant conçu pour abaisser le niveau de l'eau encore plus loin au-dessous du capteur de conductance (24) sans pour autant provoquer un fonctionnement à vide de la pompe (20) ou une aspiration d'air.
  2. Procédé selon la revendication 1, caractérisé en ce que lors de l'opération de lavage, le capteur de conductance (24) détecte s'il est entouré de mousse et de l'eau douce est ajoutée en tant qu'action corrective afin de diluer la mousse ou la lessive dans la machine à laver (11), de l'eau douce étant ajoutée dans la quantité nécessaire jusqu'à ce le capteur de conductance (24) soit majoritairement ou constamment entouré d'eau également pendant l'opération de lavage ou pendant la rotation du tambour (13).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que lors de l'opération d'essorage, notamment lorsque la pompe (20) fonctionne continuellement, la vitesse de rotation d'essorage n'est augmentée que jusqu'à ce le capteur de conductance (24) soit constamment entouré d'eau, le fonctionnement de la pompe étant commandé par le biais du capteur de conductance (24) ou de ses valeurs mesurées, la pompe (20) étant mise hors circuit en atteignant une vitesse de rotation d'essorage maximale lorsque le capteur de conductance (24) n'est pas entouré d'eau et n'étant remise en service que lorsque le capteur de conductance (24) est entouré d'eau.
  4. Procédé selon la revendication 3, caractérisé en ce que la vitesse de rotation d'essorage n'est augmentée que si après une durée plus longue, notamment quelques minutes, pendant laquelle le capteur de conductance (24) était entouré d'eau, le capteur de conductance (24) n'est alors plus entouré d'eau, la vitesse de rotation d'essorage étant de préférence augmentée lentement jusqu'à ce que le capteur de conductance (24) soit de nouveau majoritairement ou constamment entouré d'eau.
  5. Procédé selon la revendication 3 ou 4, caractérisé en ce qu'une attente pendant un intervalle de temps de quelques secondes, notamment de 5 à 20 secondes, a lieu entre un changement d'état au niveau du capteur de conductance (24) et une mise en circuit ou hors circuit de la pompe (20).
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'un processus de lavage ou de rinçage est brièvement interrompu pour l'exécution de la mesure de la conductance.
  7. Procédé selon la revendication 6, caractérisé en ce que pour l'interruption, le tambour (13) est stoppé et la mesure de la conductance est ensuite effectuée avec le tambour (13) à l'arrêt.
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 EP1932960A2 (fr) 2008-06-18
EP1932960A3 EP1932960A3 (fr) 2010-09-15
EP1932960B1 true 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)

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CN108978119A (zh) * 2017-06-01 2018-12-11 青岛海尔洗衣机有限公司 洗衣机脱水方法

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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
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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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
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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
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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
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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
EP1932960A2 (fr) 2008-06-18
RU2007146118A (ru) 2009-06-20
US20080141465A1 (en) 2008-06-19
ES2628041T3 (es) 2017-08-01

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