EP0407272B1 - Waschmaschine mit verbessertem Spülen und geringem Wasserverbrauch - Google Patents

Waschmaschine mit verbessertem Spülen und geringem Wasserverbrauch Download PDF

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Publication number
EP0407272B1
EP0407272B1 EP90401867A EP90401867A EP0407272B1 EP 0407272 B1 EP0407272 B1 EP 0407272B1 EP 90401867 A EP90401867 A EP 90401867A EP 90401867 A EP90401867 A EP 90401867A EP 0407272 B1 EP0407272 B1 EP 0407272B1
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EP
European Patent Office
Prior art keywords
laundry
centrifugation
rinsing
speed
increase
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.)
Expired - Lifetime
Application number
EP90401867A
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English (en)
French (fr)
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EP0407272A1 (de
Inventor
Philippe Couillaud
Gilles Ouvrard
Franck Violleau
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.)
Esswein SA
Original Assignee
Esswein SA
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Publication date
Application filed by Esswein SA filed Critical Esswein SA
Publication of EP0407272A1 publication Critical patent/EP0407272A1/de
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Publication of EP0407272B1 publication Critical patent/EP0407272B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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

Definitions

  • the present invention relates to an improved water-saving rinsing washing machine.
  • Known washing machines usually include in their rinsing cycle several rinses which each include the following operations: filling the tank with water, stirring the laundry by rotating the washing drum and emptying the tank. Some rinses are completed during the emptying of the tank by a spin of the laundry said intermediate spin which allows to extract from this laundry a relatively large amount of detergent water retained by this laundry. The earlier the intermediate spins start in the first rinses and the greater the speed of these intermediate spins of the laundry, the greater the quantity of detergent water extracted from this laundry. The greater this quantity of detergent water extracted from the laundry, the lower the residual quantity of detergent water retained in the laundry thus spun. When the residual quantity of detergent water retained by the laundry spun in a previous rinse is low, the pollution of the bath of a subsequent rinse by this residual detergent water is also low. The essential number of rinsing of the laundry in the rinsing cycle is then low and the amount of water consumed by these rinses is therefore advantageously reduced.
  • the aim of the present invention is to avoid these drawbacks and makes it possible to produce a rinsing washing machine improved in quality and economical in water, with intermediate spins carried out at relatively high speeds.
  • a process for rinsing laundry in a washing machine is characterized in that the intermediate spin, to be done at a selected speed of between 400 rpm and about 1000 rpm, is interrupted as soon as '' a foaming emulsion in formation in the tank reaches a predetermined degree of importance, the foam being detected by means of a measurement of the growth of the intensity of the electric current of the driving motor of the laundry drum, a preset value of this growth in the intensity of the electric current corresponding to this predetermined degree of importance of this frothy emulsion, and the intermediate spin is restored after evacuation of this frothy emulsion by a drain pump, the interruption and restoration of this spin is renewed until this intermediate spin of the laundry is carried out at said selected speed.
  • a washing machine 1 produced according to the invention and illustrated in Figures 1 to 3, comprises a body 2, a tank 3, a washing drum 4 rotating around a horizontal axis 5 and driven in rotation by an electric motor 7 , and a pump 8 for emptying the tank 3.
  • the washing machine 1 mainly comprises in its operation a prewash cycle, a washing cycle, a rinsing cycle and a final spin cycle.
  • the rinsing cycle comprises several rinses, each of which begins with a filling of the tank with water then a stirring of the laundry in this water and finally ends with a draining of this tank 3, accompanied by a spinning of the so-called intermediate spinning which makes it possible to extract a relatively large amount of water from this linen.
  • the detergent water retained by a cloth at the exit of a previous rinsing is diluted by the bath of a following rinsing then extracted from this cloth and evacuated with this bath in towards the outside by the drain pump 8.
  • the washing machine 1 comprises at the end of each rinsing of its rinsing cycle and during an emptying of the tank 3, an intermediate spin of the laundry at a selected high speed, an interruption of this intermediate spin as soon as that a formation of a frothy emulsion reaches a degree of importance predetermined and a recovery of this spin at high speed after evacuation of this frothy emulsion by the drain pump, this interruption and this recovery being renewed until this intermediate spin can be performed at the selected high speed.
  • the high speed chosen for the intermediate spins is preferably between 400 revolutions per minute and 1000 revolutions per minute.
  • a foaming emulsion may form. If the spin continues, this frothy emulsion becomes more and more abundant and dense, hinders the evacuation of detergent water from the tank and results in the formation, with this non-evacuated water, of a ring of a frothy emulsion around of the washing drum, which generates an unpleasant noise and overflowing foam.
  • a stop of this spinning interrupts the development of this foaming emulsion, and facilitates rapid evacuation by the drain pump 8 of this washing water and this foaming emulsion accumulated in the tank 3.
  • the intermediate spinning of the laundry at a selected high speed is restored to extract a maximum quantity of washing water retained by this washing and leave in this washing a minimal residual quantity of washing water which pollutes the bath of a subsequent rinsing. Thanks to this high speed spin, the essential number of rinses in a rinse cycle can be reduced to a minimum as well as the amount of water consumed by these rinses. Improved rinsing of the laundry is thus obtained with an appreciable saving in rinsing water.
  • a formation of a frothy emulsion reaching a predetermined degree of importance during an intermediate spin of the laundry is detected by means of a measurement of a growth in the intensity of the electric current of the laundry drum drive taking place during of a period at stabilized speed of this spinning and when a predetermined value of this growth in the intensity of electric current, which corresponds to this predetermined degree of importance of this formation of the foaming emulsion is reached.
  • the interval t3 t5 where the speed of the drum 4 is stabilized at 400 revolutions per minute, first in the case of washing the laundry without detergent, the intensity drops in the interval t3-t4 of the value i3 at a lower value i4 and continues to go down to an i5 value lower than i4 (figure 2, curve A) and then in the case of washing the laundry with a detergent, the intensity also goes down from the value i3 at a lower value i4 in the interval t3-t4 but this intensity rises from the value i4 to a higher value i5 in t5 ( Figure 3, curve A) in the interval t4-t5.
  • This intensity of the current in the motor 7 thus faithfully reflects the degree of importance of formation of the foaming emulsion in the tank 3.
  • the washing machine comprises at the end of each rinsing of its rinsing cycle and during a drain, an intermediate spin of the laundry, at a high speed chosen with a speed increase in stages, a measuring a growth in the intensity of the electric current of the laundry drum drive motor occurring during each of these stages, that is to say periods when the rotational speeds of the drum are stabilized in this rise in the intermediate spin speed, an interruption of this spin as soon as this increase in the intensity of electric current reaches a preset value corresponding to a predetermined degree of importance of a formation of a frothy emulsion in the tank 3 and a re-establishment of this spin at high speed after evacuation of this frothy emulsion by the drain pump) this interruption and this re-establishment is re new until this intermediate spin can be performed at the selected high speed.
  • this speed is obtained by an increase in speed in successive stages, for example by stabilized speed stages at 100, 300, 450, 850 revolutions per minute. Measurements of growth of the intensity of the electric current of the drive motor 7 of the laundry drum 4 are carried out during each of these speed steps where the speeds of the laundry drum 4 are respectively stabilized at 100, 300, 450 and 850 revolutions per minute.
  • the intermediate spin is interrupted to allow evacuation of the washing water and the foaming emulsion from the tank 3, by this drain pump, and restored again after this evacuation until this intermediate spin of the laundry can be done at a selected high speed.

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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)
  • Detergent Compositions (AREA)

Claims (4)

  1. Spülverfahren für Wäsche in einer Waschmaschine, das am Ende jedes der Spülzyklen seines Spülgangs und während eines Abpumpens ihres Bottichs (3) ein Zwischenschleudern der Wäsche aufweist, ohne dabei den Betrieb der Abwasserpumpe (8) durch eine sich bildende schaumförmige Emulsion zu unterbrechen, dadurch gekennzeichnet, daß der Zwischenschleudervorgang, der bei einer gewählten Geschwindigkeit zwischen etwa 400 U/m und 1000 U/m durchgeführt werden soll, unterbrochen wird, sobald eine sich im Bottich (3) bildende schaumförmige Emulsion einen vorbestimmte Grad erreicht, wobei der Schaum mittels einer Messung des Ansteigens der Stärke des elektrischen Stroms des Antriebsmotors (7) der Wäschetrommel (4) erfaßt wird und wobei ein vorbestimmter Wert dieses Ansteigens der elektrischen Stromstärke dem vorbestimmten Grad der schaumartigen Emulsion entspricht, und daß der Zwischenschleudervorgang wieder aufgenommen wird nach einem Abpumpen dieser schaumförmigen Emulsion durch eine Abwasserpumpe (8), wobei die Unterbrechung und die Wiederaufnahme dieses Schleuderns sich wiederholen, bis der Zwischenschleudervorgang der Wäsche bei der gewählten Geschwindigkeit erfolgt.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß am Ende jedes der Spülzyklen ihres Spülgangs und während eines Abpumpens das Zwischenschleudern der Wäsche mit einer gewählten hohen Geschwindigkeit mit einem Geschwindigkeitsanstieg in Stufen erfolgt, wobei auf jeder Stufe eine Messung eines Anstiegs der Stärke des elektrischen Stroms des Antriebsmotors (7) der Wäschetrommel durchgeführt wird und das Zwischenschleudern unterbrochen, sobald dieser Anstieg der Stärke des gemessenen elektrischen Stroms einen vorbestimmten Wert erreicht, der einem vorbestimmten Grad einer sich in dem Bottich (3) bildenden schaumförmigen Emulsion entspricht, sowie wiederaufgenommen wird nach einem Entleeren dieser schaumförmigen Emulsion durch die Abwasserpumpe (8), wobei diese Unterbrechung und diese Wiederaufnahme sich wiederholen, bis dieses Zwischenschleudern bei der gewählten hohen Geschwindigkeit durchgeführt wird.
  3. Verfahren nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß am Ende jedes Spülzyklus des Spülgangs ein Zwischenschleudern der Wäsche mit einer hohen Geschwindigkeit erfolgt, die zwischen 400 und 1000 U/min liegt.
  4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß am Ende jedes der Spülzyklen des Spülgangs und während einem Abpumpen ein Zwischenschleudern der Wäsche bei einer Geschwindigkeit von 850 U/min mit einem stufenförmigen Geschwindigkeitsanstieg in aufeinanderfolgenden Stufen mit auf 100, 300, 450, 850 U/min stabilisierten Geschwindigkeiten erfolgt, während denen eine Messung eines Anstiegs der Stärke des elektrischen Stroms des Antriebsmotors (7) der Wäschetrommel (4) durchgeführt wird, wobei eine Unterbrechung dieses Schleuderns jedesmal dann erfolgt, wenn dieser Anstieg der gemessenen Stärke des elektrischen Stroms einen vorbestimmten Wert erreicht, der einem vorbestimmten Grad einer sich im Bottich (3) bildenden schaumförmigen Emulsion entspricht, und das Schleudern nach einem Abpumpen dieser schaumförmigen Emulsion durch die Abwasserpumpe (8) wiederaufgenommen wird, wobei diese Unterbrechung und diese Wiederaufnahme sich wiederholen, bis dieses Zwischenschleudern der Wäsche bei der gewählten Geschwindigkeit von 850 U/min durchgeführt wird.
EP90401867A 1989-07-04 1990-06-28 Waschmaschine mit verbessertem Spülen und geringem Wasserverbrauch Expired - Lifetime EP0407272B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8908963 1989-07-04
FR8908963A FR2649422B1 (fr) 1989-07-04 1989-07-04 Lave-linge a rincage ameliore et economique en eau

Publications (2)

Publication Number Publication Date
EP0407272A1 EP0407272A1 (de) 1991-01-09
EP0407272B1 true EP0407272B1 (de) 1995-03-29

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EP90401867A Expired - Lifetime EP0407272B1 (de) 1989-07-04 1990-06-28 Waschmaschine mit verbessertem Spülen und geringem Wasserverbrauch

Country Status (4)

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EP (1) EP0407272B1 (de)
DE (1) DE69018145T2 (de)
ES (1) ES2070290T3 (de)
FR (1) FR2649422B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108035122A (zh) * 2018-01-27 2018-05-15 张太平 一种防泡沫溢出洗衣机
CN108179586A (zh) * 2018-01-27 2018-06-19 张太平 一种洗衣机泡沫控制方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6748618B1 (en) * 1998-11-17 2004-06-15 Fisher & Paykel Limited Top loading washing machine and method of braking same
EP1971714B1 (de) * 2005-12-29 2019-05-08 Arçelik Anonim Sirketi Waschmaschine und steuerungsverfahren
EP2746444B1 (de) * 2012-12-21 2015-12-09 Electrolux Home Products Corporation N.V. Verfahren zur Steuerung einer Waschmaschine und Waschmaschine
DE102016204347A1 (de) * 2016-03-16 2017-09-21 BSH Hausgeräte GmbH Verfahren zum Betrieb eines wasserführenden Haushaltsgeräts mit verbessertem Pumpbetrieb

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1370054A (en) * 1972-03-07 1974-10-09 Philips Electronic Associated Washing machines
FR2546540B1 (fr) * 1983-05-27 1985-07-05 Thomson Brandt Lave-linge a essorage de courte duree apres le rincage
DE3638498C2 (de) * 1986-11-11 1994-06-30 Licentia Gmbh Programmgesteuerte Waschmaschine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108035122A (zh) * 2018-01-27 2018-05-15 张太平 一种防泡沫溢出洗衣机
CN108179586A (zh) * 2018-01-27 2018-06-19 张太平 一种洗衣机泡沫控制方法
CN108035122B (zh) * 2018-01-27 2019-11-26 深圳市景方盈科技有限公司 一种防泡沫溢出洗衣机
CN108179586B (zh) * 2018-01-27 2019-12-27 深圳市景方盈科技有限公司 一种洗衣机泡沫控制方法

Also Published As

Publication number Publication date
FR2649422A1 (fr) 1991-01-11
EP0407272A1 (de) 1991-01-09
ES2070290T3 (es) 1995-06-01
DE69018145T2 (de) 1995-08-03
DE69018145D1 (de) 1995-05-04
FR2649422B1 (fr) 1992-01-03

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