EP0407272A1 - Washing machine with improved rinsing and a low water consumption - Google Patents
Washing machine with improved rinsing and a low water consumption Download PDFInfo
- Publication number
- EP0407272A1 EP0407272A1 EP90401867A EP90401867A EP0407272A1 EP 0407272 A1 EP0407272 A1 EP 0407272A1 EP 90401867 A EP90401867 A EP 90401867A EP 90401867 A EP90401867 A EP 90401867A EP 0407272 A1 EP0407272 A1 EP 0407272A1
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- EP
- European Patent Office
- Prior art keywords
- laundry
- rinsing
- spin
- intensity
- speed
- 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.)
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- 238000005406 washing Methods 0.000 title claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000000839 emulsion Substances 0.000 claims abstract description 34
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 19
- 238000009987 spinning Methods 0.000 claims abstract description 12
- 238000005187 foaming Methods 0.000 claims description 25
- 238000011084 recovery Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 5
- 239000003599 detergent Substances 0.000 description 20
- 239000006260 foam Substances 0.000 description 6
- 230000000717 retained effect Effects 0.000 description 5
- 241001417494 Sciaenidae Species 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 241000195940 Bryophyta Species 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 235000011929 mousse Nutrition 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005021 gait Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
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
- D06F39/06—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 a washing machine with improved rinsing and economical in water.
- 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 called 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.
- 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 quantity of water consumed by these rinses is consequently 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 washing machine with improved rinsing and economical in water comprises, at the end of each rinsing of its rinsing cycle and during an emptying of its tank, an intermediate spin of the laundry to a selected high speed, an interruption of this intermediate spin as soon as a formation of a foaming emulsion reaches a predetermined degree of importance, and a re-establishment of this spinning after an evacuation of this foaming emulsion by a drain pump, this interruption and this recovery being renewed until this intermediate spin of the laundry can be achieved at the selected high speed.
- a washing machine 1 produced according to 1 invention and illustrated in FIGS. 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 mixing 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 outlet 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 of the rinses 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 foaming 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 machine, which generates an unpleasant noise and a soft overflow.
- 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 minimum 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 foaming 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 at the moment when a preset 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 goes down in the interval t3-t4 from the value 13 to a lower value 14 and continues to go down to an i5 value less than 14 (figure 2, curve A) and then in the case of washing the laundry with detergent, the intensity also drops from the v alor 13 at a lower value 14 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 of the rinses 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 increase 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 pallers at speeds stabilized 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 rpm.
- 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)
Abstract
Description
La présente invention concerne un lave-linge à rinçage amélioré et économique en eau.The present invention relates to a washing machine with improved rinsing and economical in water.
Des lave-linge connus, comprennent habituellement dans leur cycle de rinçage plusieurs rinçages qui comportent chacun les opérations suivantes : un remplissage de la cuve en eau, un brassage du linge par rotation du tambour à linge et une vidange de la cuve. Certains rinçage sont complétés au cours de la vidange de la cuve par un essorage du linge dit essorage intermédiaire qui permet d'extraire de ce linge une quantité relativement importante d'eau de lessive retenue par ce linge. Plus les essorages intermédiaires commencent tôt dans les premiers rinçages et plus la vitesse de ces essorages intermédiaires du linge est grande, plus la quantité d'eau de lessive extraite de ce linge est importante. Plus cette quantité d'eau de lessive extraite du linge est grande, plus la quantité résiduelle d'eau de lessive retenue dans le linge ainsi essoré est faible. Quand la quantité résiduelle d'eau de lessive retenue par le linge essoré dans un rinçage précédent est faible, la pollution du bain d'un rinçage suivant par cette eau résiduelle de lessive est également faible. Le nombre indispensable de rinçage du linge dans cycle de rinçage est alors faible et la quantité d'eau consommee par ces rinçages est par conséquent avantageusement réduite.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 called 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 quantity of water consumed by these rinses is consequently advantageously reduced.
Dans des lave-linge connus, des essorages intermédiaires dans un cycle de rinçage, même ceux à vitesses relativement modérées de l'ordre de 450 tours par minute entraînent habituellement une formation d'une mousse abondante qui gêne ou empêche une bonne évacuation de l'eau de lessive de la cuve par la pompe de vidange et favorise en conséquence une formation avec cette eau de lessive non évacuée d'un anneau d'une émulsion mousseuse autour du tambour à linge qui engendre un bruit désagréable et un débordement de mousse.In known washing machines, intermediate spins in a rinse cycle, even those at relatively moderate speeds of the order of 450 revolutions per minute usually result in the formation of an abundant foam which hinders or prevents proper evacuation of the detergent water from the tank by the drain pump and consequently promotes a formation with this detachable detergent water of a ring of a foaming emulsion around the laundry drum which generates an unpleasant noise and overflow of foam.
Pour cette raison dans des lave-linge connus, des essorages intermédiaires dans leur cycle de rinçage ne commencent que très tard après plusieurs premiers rinçages et sont en général faits avec une vitesse modérée qui dépasse rarement 400 tours par minute. Le linge essoré dans ces conditions retient encore une bonne quantité résiduelle d'eau de lessive, ce qui explique que pour obtenir un linge bien rincé, des lave-linge connus exigent un nombre relativement grand de rinçage dans un cycle de rinçage, et une consommation relativement importante d'eau.For this reason in known washing machines, intermediate spins in their rinsing cycle do not start until very late after several first rinses and are generally carried out with a moderate speed which rarely exceeds 400 revolutions per minute. Laundry spun under these conditions still retains a good residual amount of washing water, which explains why to obtain a well rinsed laundry, known washing machines require a relatively large number of rinses in a rinse cycle, and consumption relatively large amount of water.
La présente invention ayant pour but d'éviter ces inconvénients permet de réaliser un lave-linge à rinçage amélioré en qualité et économique en eau, avec des essorages intermédiaires effectués à des vitesses relativement élevées.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.
Selon l'invention, un lave-linge à rinçage amélioré et économique en eau est caractérisé en ce qu'il comprend à la fin de chacun des rinçages de son cycle de rinçage et durant une vidange de sa cuve, un essorage intermédiaire du linge à une vitesse élevée choisie, une interruption de cet essorage intermédiaire dès qu'une formation d'une emulsion mousseuse atteint un degré d'importance prédéterminé, et un rétablissement de cet essorage après une évacuation de cette émulsion mousseuse par une pompe de vidange, cette interruption et ce rétablissement se renouvelant jusqu'à ce que cet essorage intermédiaire du linge puisse être réalisé la vitesse élevée choisie.According to the invention, a washing machine with improved rinsing and economical in water is characterized in that it comprises, at the end of each rinsing of its rinsing cycle and during an emptying of its tank, an intermediate spin of the laundry to a selected high speed, an interruption of this intermediate spin as soon as a formation of a foaming emulsion reaches a predetermined degree of importance, and a re-establishment of this spinning after an evacuation of this foaming emulsion by a drain pump, this interruption and this recovery being renewed until this intermediate spin of the laundry can be achieved at the selected high speed.
Pour mieux faire comprendre l'invention, on décrit ci-après un certain nombre d'exemples de réalisation illustré par des dessins ci-annexés dont :
- - la figure 1 représente une vue schématique partielle en perspective d'un lave-linge réalisé selon l'invention
- - la figure 2 représente deux courbes en fonction du temps, une courbe A d'intensité du courant électrique d'un moteur d'entraînement d'un tambour à linge du lave linge de la figure 1 et une courbe B de vitesse de ce tambour en tours par minute, au cours d'un essorage intermédiaire dans un rinçage d'un linge lavé sans lessive, autrement dit un essorage sans aucune formation de mousse, et
- - la figure 3 représente deux courbes en fonction du temps, une courbe A d'intensité du courant électrique du moteur d'entraînement du tambour à linge du lavé-linge de la figure 1 et une courbe B de vitesse de ce tambour en tours par minute, au cours d'un essorage intermédiaire dans un rinçage d'un linge lavé avec une lessive autrement dit un essorage engendrant une formation d'une mousse.
- - Figure 1 shows a partial schematic perspective view of a washing machine produced according to the invention
- - Figure 2 shows two curves as a function of time, a curve A of the intensity of the electric current of a motor driving a laundry drum of the washing machine of Figure 1 and a curve B of the speed of this drum in revolutions per minute, during an intermediate spin in a rinse of a laundry washed without detergent, in other words a spin without any foaming, and
- FIG. 3 represents two curves as a function of time, a curve A of the intensity of the electric current of the drive motor of the laundry drum of the washing machine of FIG. 1 and a curve B of speed of this drum in revolutions by minute, during an intermediate spin in a rinse of a linen washed with a detergent in other words a spin generating a foam formation.
Un lave-linge 1 réalisé selon 1 invention et illustré dans les figures 1 à 3, comprend une carrosserie 2, une cuve 3, un tambour à linge 4 tournant autour d'un axe horizontal 5 et entraîné en rotation par un moteur électrique 7, et une pompe 8 de vidange de la cuve 3.A washing machine 1 produced according to 1 invention and illustrated in FIGS. 1 to 3, comprises a
Le lave-linge 1 comprend principalement dans son fonctionnement un cycle de prélavage un cycle de lavage, un cycle de rinçage et un cycle d'essorage final. Le cycle de rinçage comprend plusieurs rinçages dont chacun commence avec un rempllssage en eau de la cuve 3 puis un brassage du linge dans cette eau et se termine enfin avec une vidange de cette cuve 3, accompagnée d'un essorage du linge dit essorage intermédiaire qui permet d'extraire de ce linge une quantité relativement importante d'eau. Dans chacun de ces rinçages, l'eau de lessive retenue par un linge à la sortie d'un rinçage précédent est diluée par le bain d'un rinçage suivant puis extraite de ce linge et évacuée avec ce bain in vers l'extérieur par la pompe de vidange 8.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 mixing 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. In each of these rinses, the detergent water retained by a cloth at the outlet 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.
Selon une caractéristique importante, le lave-linge 1 comprend à la fin de chacun des rinçages de son cycle de rinçage et durant une vidange de la cuve 3, un essorage intermédiaire du linge à une vitesse élevée choisie, une interruption de cet essorage intermédiaire dès qu'une formation d'une émulsion mousseuse atteint un degré d'importance prédéterminé et un rétablissement de cet essorage à vitesse élevée après une évacuation de cette émulsion mousseuse par la pompe de vidange, cette interruption et ce rétablissement se renouvelant jusqu'à ce que cet essorage intermédiaire puisse être réalisé à la vitesse élevée choisie.According to an important characteristic, the washing machine 1 comprises at the end of each of the rinses 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 foaming emulsion by the drain pump, this interruption and this recovery being renewed until this intermediate spin can be performed at the selected high speed.
La vitesse élevée choisie des essorages intermédiaires est de préférence située entre 400 tours par minute et 1000 tours par minute.The high speed chosen for the intermediate spins is preferably between 400 revolutions per minute and 1000 revolutions per minute.
Dans un cycle de rinçage, lors d'un essorage à la fin d'un rinçage, une formation d'une émulsion mousseuse peut se produire. Si l'essorage continue, cette émulsion mousseuse devient de plus en plus abondante et dense, gêne l'évacuation d'eau de lessive de la cuve et entraîne une formation avec cette eau non évacuée, d'un anneau d'une émulsion mousseuse autour du tambour à linge, qui engendre un bruit désagréable et un débordement de mous se.In a rinse cycle, during a spin at the end of a rinse, 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 machine, which generates an unpleasant noise and a soft overflow.
Un arrêt de cet essorage interrompt le développement de cette émulsion mousseuse, et facilite une évacuation rapide par la pompe de vidange 8 de cette eau de lessive et de cette émulsion mousseuse accumulées dans la cuve 3. Après cette vidange de la cuve 3, l'essorage intermédiaire du linge à une vitesse élevée choisie est rétabli pour extraire une quantité maximale d'eau de lessive retenue par ce linge et laisser dans ce linge une quantité résiduelle minimale d'eau de lessive qui pollue le bain d'un rinçage subséquent. Grâce à cet essorage à vitesse élevée, le nombre indispensable de rinçages dans un cycle de rinçage peut être réduit au minimum ainsi que la quantité d'eau consommée par ces rinçage. Un rinçage amélioré du linge est ainsi obtenu avec une appréciable économie en eau de rinçage.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. After this emptying of 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 minimum 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.
Selon l'invention, une formation d'une émulsion mousseuse atteignant un degré d'importance prédéterminé lors d'un essorage intermédiaire du linge est détectée au moyen d'une mesure d'une croissance de l'intensité du courant électrique du moteur d'entraînement du tambour à linge ayant lieu au cours d'une période à vitesse stabilisée de cet essorage et au moment où une valeur préétablle de cette croissance de l'intensité de courant électrique, qui correspond à ce degré d'importance prédéterminé de cette formation de l'émulsion mousseuse est atteinte.According to the invention, a formation of a foaming 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 at the moment when a preset 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.
En effet, dans une étude comparative des courbes A d'intensité en fonction du temps, du courant électrique du moteur 7 d'entraînement du tambour à linge 4 lors d'un essorage intermédiaire dans un cycle de rinçage, respectivement relevées dans deux cas de lavage d'un linge, la première des courbes A (figure 2) étant relative à un essorage à 400 tours par minute dans un rinçage d'un linge, consécutif à un lavage sans lessive de ce linge, et la deuxième des courbes A (figure 3) correspondant à un essorage à 400 tours par minute dans un rinçage d'un linge, consécutif à un lavage de ce linge avec une lessive, on remarque que les deux courbes A ont une même allure dans l'intervalle t1-t4 et deux allures différentes dans l'intervalle de temps t4-t5.Indeed, in a comparative study of the curves A of intensity as a function of time, of the electric current of the motor 7 for driving the linen drum 4 during an intermediate spin in a rinse cycle, respectively noted in two cases of washing a linen, the first of curves A (FIG. 2) relating to a spin at 400 revolutions per minute in a rinsing of a linen, following a washing without washing of this linen, and the second of curves A ( FIG. 3) corresponding to a spin at 400 revolutions per minute in the rinsing of a cloth, following a washing of this cloth with a detergent, it is noted that the two curves A have the same shape in the interval t1-t4 and two different gaits in the time interval t4-t5.
Dans l'intervalle t1-t2 où la vitesse du tambour à linge 4 entraîné par le moteur électrique 7 monte suivant une accélération progressive d'une vitesse nulle A une vitesse de 130 tours par minute, l'intensité partant d'ne valeur 10 passe par une valeur 11 puis descend à une valeur inférieure 12 et dans l'intervalle de temps t2-t3 où la vitesse du tambour à linge 4 monte suivant une accélération rapide de la vitesse 130 tours par minute à une vitesse de 400 tours par minute l'intensité remonte de nouveau à une valeur 13, 13 étant supérieure à 12. Par contre, l'intervalle t3 t5 où la vitesse du tambour 4 est stabilisée à 400 tours par minute, d'abord dans le cas d'un lavage du linge sans lessive, l'intensité descend dans l'intervalle t3-t4 de la valeur 13 à une valeur inférieure 14 et continue à descendre jusqu'à une valeur i5 inférieure à 14 (figure 2, courbe A) et ensuite dans le cas d'un lavage du linge avec une lessive, l'intensité descend aussi de la valeur 13 à une valeur inférieure 14 dans l'intervalle t3-t4 mais cette intensité monte de la valeur i4 à une valeur supérieure i5 en t5 (figure 3, courbe A) dans l'intervalle t4-t5.In the interval t1-t2 where the speed of the laundry drum 4 driven by the electric motor 7 increases according to a progressive acceleration from zero speed At a speed of 130 revolutions per minute, the intensity starting from a value 10 passes by a value 11 then decreases to a
Dans le cas d'un lavage du linge avec une lessive (figure 3) la montée de l'intensité de la valeur i4 à la valeur i5 du courant du moteur 7 est due à la formation d'une émulsion mousseuse dans la cuve 3 et d'un anneau de cette émulsion mousseuse autour du tambour 4 qui devient de plus en plus dense et augmente le couple résistant oppose par ce tambour 4 à l'effort d'entraînement du moteur électrique 7.In the case of washing the laundry with a detergent (Figure 3), the increase in intensity from the value i4 to the value i5 of the current of the motor 7 is due to the formation of a frothy emulsion in the tank 3 and a ring of this foaming emulsion around the drum 4 which becomes increasingly dense and increases the resistive torque opposed by this drum 4 to the drive force of the electric motor 7.
Plus cette émulsion mousseuse est abondante et plus cet anneau d'émulsion mousseuse est den ce, plus le couple résistant opposé par le tambour à linge 4 est grand et plus l'intensité du courant dans le moteur 7 d'entraînement de ce tambour est grande.The more this foaming emulsion is abundant and the more this foaming emulsion ring is, the greater the resistive torque opposed by the washing drum 4 and the greater the intensity of the current in the motor 7 driving this drum. .
Cette intensité du courant dans le moteur 7 traduit ainsi fidèlement le degré d'importance de formation de l'émulsion mousseuse dans la cuve 3.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.
Dans le cas du lavage du linge sans lessive (figure 2) il ne se forme ni mousse ni anneau d'émulsion mousseuse autour du tambour à linge 4 lors d'un essorage intermédiaire dans un rinçage. En effet, une absence de mousse permet à la pompe de vidange d'évacuer efficacement et rapidement l'eau de lessive de la cuve et de diminuer en conséquence le couple résistant opposé par le tambour à linge à l'effort d'entraînement du moteur électrique 7.In the case of washing laundry without detergent (Figure 2), neither foam nor foaming emulsion ring forms around the laundry drum 4 during an intermediate spin in a rinse. Indeed, an absence of foam allows the drain pump to efficiently and quickly evacuate the detergent water from the tank and consequently reduce the resistance torque opposed by the washing drum to the drive effort of the engine. electric 7.
Dans le cas du lavage du linge avec lessive (figure 3) l'anneau d'émulsion mousseuse formé autour du tambour à linge lors d'un essorage intermédiaire dans un rincage se développe au contraire rapidement en volume en s'alimentant au fur et à mesure de l'eau de lessive extraite du linge qui n'est pas évacuée par la pompe de vidange à cause de la mousse qui se forme gêne ou empêche l'action de cette pompe. Cet anneau d'émulsion mousseuse qui grandit, augmente en effet au fur et à mesure de son développement, le couple résistant opposé par le tambour à linge à l'effort d'entraînement du moteur électrique 7.In the case of washing laundry with detergent (Figure 3) the foaming emulsion ring formed around the laundry drum during an intermediate spin in a rinsing, on the contrary, rapidly develops in volume by feeding as and when measurement of the detergent water extracted from the laundry which is not evacuated by the drain pump because of the foam which forms or obstructs the action of this pump. This foaming emulsion ring which is growing, in fact increases as it develops, the resistive torque opposed by the laundry drum to the drive force of the electric motor 7.
Selon une variante de réalisation non représentée, le lave-linge comprend à la fin de chacun des rinçages de son cycle de rinçage et durant une vidange, un essorage intermédiaire du linge, à une vitesse élevée choisie avec une montée de vitesse par paliers, une mesure d'une croissance de l'intensité du courant électrique du moteur d 'entraînement du tambour à linge ayant lieu au cours de chacun de ces paliers, c'est-à-dire des périodes où les vitesses de rotation du tambour sont stabilisées dans cette montée de la vitesse d'essorage intermédiaire, une interruption de cet essorage dès que cette croissance de l'intensité de courant électrique atteint une valeur préétablle correspondante à un degré d'importance prédétermlné d une formation d'une émulsion mousseuse dans la cuve 3 et un rétablissement de cet essorage à vitesse élevée après une évacuation de cette émulsion mousseuse par la pompe de vidange) cette interruption et ce rétablissement se renouvelant jusqu'à ce que cet essorage intermédiaire puisse être réalisé à la vitesse élevée choisie.According to an alternative embodiment not shown, the washing machine comprises at the end of each of the rinses 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 increase 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.
Dans un essorage intermédiaire à une vitesse de 850 tours par minute au cours d'un cycle de rinçage, cette vitesse est obtenue par une montée de vitesse par paliers successifs par exemple par des pallers à vitesses stabilisées à 100, 300, 450, 850 tours par minute. Des mesures de croissance d'intensité du courant électrique du moteur d'entraînement 7 du tambour à linge 4 sont effectuées au cours de chacun de ces paliers de vitesse où les vitesses du tambour à linge 4 sont respectivement stabilisées à 100, 300, 450 et 850 tours par minute. Chaque fois que la croissance de l'intensité de ce courant électrique atteint une valeur préétablle correspondante à un degré d'importance prédéterminé de formation d'une émulsion mousseuse qui gêne ou empêche une vidange de la cuve 3 par la pompe de vidange, l'essorage intermédiaire est interrompu pour permettre une évacuation de l'eau de lessive et l'émulsion mousseuse de la cuve 3, par cette pompe de vidange, et rétabli de nouveau après cette évacuation jusqu'à ce que cet essorage intermédiaire du linge puisse être effectué à une vitesse élevée choisie.In an intermediate spin at a speed of 850 revolutions per minute during a rinsing cycle, this speed is obtained by an increase in speed in successive stages for example by pallers at speeds stabilized 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 rpm. Whenever the increase in the intensity of this electric current reaches a preset value corresponding to a predetermined degree of importance of the formation of a foaming emulsion which hinders or prevents the tank 3 from being emptied by the drain pump, 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.
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8908963 | 1989-07-04 | ||
FR8908963A FR2649422B1 (en) | 1989-07-04 | 1989-07-04 | WASHING MACHINE WITH IMPROVED AND ECONOMICAL RINSING |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0407272A1 true EP0407272A1 (en) | 1991-01-09 |
EP0407272B1 EP0407272B1 (en) | 1995-03-29 |
Family
ID=9383443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90401867A Expired - Lifetime EP0407272B1 (en) | 1989-07-04 | 1990-06-28 | Washing machine with improved rinsing and a low water consumption |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0407272B1 (en) |
DE (1) | DE69018145T2 (en) |
ES (1) | ES2070290T3 (en) |
FR (1) | FR2649422B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000029660A1 (en) * | 1998-11-17 | 2000-05-25 | Fisher & Paykel Limited | Laundry machine |
WO2007074037A1 (en) * | 2005-12-29 | 2007-07-05 | Arcelik Anonim Sirketi | A washing machine and a control method |
EP2746444A1 (en) * | 2012-12-21 | 2014-06-25 | Electrolux Home Products Corporation N.V. | Method for controlling a laundry washing machine and laundry washing machine |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016204347A1 (en) * | 2016-03-16 | 2017-09-21 | BSH Hausgeräte GmbH | Method for operating a water-conducting household appliance with improved pumping operation |
CN108179586B (en) * | 2018-01-27 | 2019-12-27 | 深圳市景方盈科技有限公司 | Foam control method for washing machine |
CN108035122B (en) * | 2018-01-27 | 2019-11-26 | 深圳市景方盈科技有限公司 | A kind of foam-resistant spilling washing machine |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2175124A1 (en) * | 1972-03-07 | 1973-10-19 | Philips Nv | |
FR2546540A1 (en) * | 1983-05-27 | 1984-11-30 | Thomson Brandt | Automatic washing machine with wash rinse and spin programme |
EP0268155A2 (en) * | 1986-11-11 | 1988-05-25 | Licentia Patent-Verwaltungs-GmbH | Washing machine with a device for preventing the formation of foam |
-
1989
- 1989-07-04 FR FR8908963A patent/FR2649422B1/en not_active Expired - Fee Related
-
1990
- 1990-06-28 ES ES90401867T patent/ES2070290T3/en not_active Expired - Lifetime
- 1990-06-28 DE DE69018145T patent/DE69018145T2/en not_active Expired - Fee Related
- 1990-06-28 EP EP90401867A patent/EP0407272B1/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2175124A1 (en) * | 1972-03-07 | 1973-10-19 | Philips Nv | |
FR2546540A1 (en) * | 1983-05-27 | 1984-11-30 | Thomson Brandt | Automatic washing machine with wash rinse and spin programme |
EP0268155A2 (en) * | 1986-11-11 | 1988-05-25 | Licentia Patent-Verwaltungs-GmbH | Washing machine with a device for preventing the formation of foam |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000029660A1 (en) * | 1998-11-17 | 2000-05-25 | Fisher & Paykel Limited | Laundry machine |
WO2007074037A1 (en) * | 2005-12-29 | 2007-07-05 | Arcelik Anonim Sirketi | A washing machine and a control method |
EP2746444A1 (en) * | 2012-12-21 | 2014-06-25 | Electrolux Home Products Corporation N.V. | Method for controlling a laundry washing machine and laundry washing machine |
WO2014095752A1 (en) * | 2012-12-21 | 2014-06-26 | Electrolux Home Products Corporation N.V. | Method for controlling a laundry washing machine and laundry washing machine |
CN104919106A (en) * | 2012-12-21 | 2015-09-16 | 伊莱克斯家用产品股份有限公司 | Method for controlling a laundry washing machine and laundry washing machine |
US9828716B2 (en) | 2012-12-21 | 2017-11-28 | Electrolux Home Products Corporation N.V. | Method for controlling a laundry washing machine and laundry washing machine |
Also Published As
Publication number | Publication date |
---|---|
DE69018145D1 (en) | 1995-05-04 |
EP0407272B1 (en) | 1995-03-29 |
FR2649422B1 (en) | 1992-01-03 |
DE69018145T2 (en) | 1995-08-03 |
ES2070290T3 (en) | 1995-06-01 |
FR2649422A1 (en) | 1991-01-11 |
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