EP0159204B1 - Laundry washer, the tub containing water at a low level just above the bottom of the drum - Google Patents
Laundry washer, the tub containing water at a low level just above the bottom of the drum Download PDFInfo
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- EP0159204B1 EP0159204B1 EP85400161A EP85400161A EP0159204B1 EP 0159204 B1 EP0159204 B1 EP 0159204B1 EP 85400161 A EP85400161 A EP 85400161A EP 85400161 A EP85400161 A EP 85400161A EP 0159204 B1 EP0159204 B1 EP 0159204B1
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- drum
- rotation
- speed
- water
- washing
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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
- D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
- D06F35/005—Methods for washing, rinsing or spin-drying
- D06F35/006—Methods for washing, rinsing or spin-drying for washing or rinsing only
Definitions
- the invention relates to a washing machine with drum rotating in a tank, of the domestic type, in which the pieces of linen are introduced into the drum before any command to introduce water into the tank.
- the cost of washing depends, in particular, on the quantity of water used for washing and rinsing due, on the one hand, to the price of the water itself and, on the other hand, to the fact that the quantity of energy required to heat the water is proportional to the volume of water. It is therefore beneficial to reduce this volume of water to a minimum.
- the invention achieves this result.
- means are provided for maintaining the level of water in the tank at said height above the bottom of the drum by opening a water intake solenoid valve when the level of the latter has dropped into the tank.
- the invention provides, according to a second of its aspects, which can be used independently of the first, a washing machine characterized by the characteristics of the claim 7.
- the wetting process can be explained as follows: the water level being low, the quantity of water introduced during the first phase is insufficient to properly wet the laundry even if it absorbs all the water which is above the bottom of the drum. In addition, this absorbed water is not evenly distributed in the laundry; some parts may even stay completely dry.
- the mixing by slow rotation of the drum distributes the laundry almost randomly. Under these conditions when the drum rotates at centrifugation or spin speed, some dry pieces of laundry are further from the axis of the drum than other wet pieces; it follows that during centrifugation the water expressed from the wet laundry reaches the dry laundry, which wets the latter. It is thus understood that a limited number of spins is sufficient to completely wet the laundry.
- FIG. 1 and 2 There is shown very schematically in Figures 1 and 2 a washing machine which comprises a tank 10 inside which rotates a cylindrical drum 12 of horizontal axis 20 delimited by vertical walls 14 ( Figure 3).
- the washing or rinsing water is introduced into the tank through a solenoid valve 16.
- This washing machine is of the usual domestic type, that is to say that it conventionally includes a programmer so that its operation is fully automatic and various safety devices such as that which completely interrupts operation when the cover is open.
- the cylindrical wall 13 of the drum 12 is perforated to allow the water 15 from the tank enters the drum and can thus impregnating cloth 14 introduced into the drum.
- the operation of the machine is not intended to start in principle only after introduction of all the pieces of laundry into the drum. Moreover, this operation, and in particular the arrival of water, cannot intervene during the introduction of the linen because, for this operation, the cover of the machine is necessarily open.
- the free surface 40 of the water in the tank 10 is at a low height h, for example of the order of 1.5 cm, above the bottom 30 of the drum, the diameter of which is approximately 44.5 cm in the example.
- the solenoid valve 16 is closed automatically when this free surface has reached this predetermined level.
- a vertical wall 11 of the tank 10 has an opening 31 (FIG. 3) whose axis is practically at said predetermined level, at height h above the bottom 30 of the drum.
- This opening is traversed by a bowl 33, of generally cylindrical shape, made for example of plastic material, the opening 41 of which is in the tank and the bottom 34 of which is outside this tank.
- the seal between the outer surface of the bowl 33 and the edges of the opening 31 is ensured by a seal 32 covering the two faces of the vertical wall 11 in the vicinity of the edges of the opening 31 as well as the edges of this opening and the outer surface of the bowl.
- This bowl 33 contains, in the vicinity of the bottom 34, a cylindrical sleeve 35 with a horizontal axis parallel to the wall 11 and forming an intersection with the axis of said bowl; this sleeve connects to sealing two diametrically opposite openings 36 and 37 of the wall of the bowl (FIG. 4).
- the sleeve 35 contains a thermistor 38 supplied with electric current by a voltage source (not shown) of sufficient value for this thermistor to be heated by the Joule effect.
- the sleeve 35 is established in one piece by molding with the rest of the bowl 33.
- the thickness of the sleeve 35 is however less than that of the wall of the bowl to allow good thermal contact between, on the one hand, the water which bathes part of the external surface of the sleeve 35 and, on the other hand, the thermistor 38 at l inside the sleeve, where water does not penetrate.
- the thermistor 38 When the water comes into contact with the sleeve 35 it cools its wall and therefore the thermistor 38. Under these conditions the electrical resistance of this thermistor varies. This resistance variation is used to supply the solenoid valve 16 with a control signal to stop filling.
- this speed of rotation is lower than the speed of rotation used for stirring the laundry for washing or rinsing.
- the speed of rotation of the drum for wetting is of the order of 30 revolutions per minute while the speed of rotation of the drum for washing or rinsing is of the order of 50 revolutions per minute.
- centrifugation is carried out for a time of the order of 30 seconds.
- the solenoid valve 16 is then opened again to complete the level up to said height h and the drum is then rotated at the speed V1 of about 30 revolutions per minute.
- a new rotation cycle at low speed V1 and then at centrifugation speed Vation is then implemented. It has been found that about ten such cycles are sufficient to obtain uniform and sufficient wetting of the laundry. It is only after these various cycles that the drum rotates at the speed V3 of the order of 50 revolutions per minute for washing or rinsing.
- the rotational speed for washing being 50 revolutions per minute it has been found that good wetting is obtained when the rotational speed is less than 35 revolutions per minute, and preferably between 15 and 35 revolutions per minute.
- centrifugations are carried out at a speed V2, for example of the order of 500 revolutions per minute, it is not always essential, for wetting the laundry, that the speed V1 is less than the speed V3 of stirring for washing or rinsing.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
- Treatment Of Fiber Materials (AREA)
- Centrifugal Separators (AREA)
Abstract
Description
L'invention est relative à un lave-linge à tambour tournant dans une cuve, du type domestique, dans lequel les pièces de linge sont introduites dans le tambour avant toute commande d'introduction d'eau dans la cuve.The invention relates to a washing machine with drum rotating in a tank, of the domestic type, in which the pieces of linen are introduced into the drum before any command to introduce water into the tank.
On sait que dans un tel lave-linge le tambour qui contient le linge à laver, présente des parois perforées et, le plus souvent, des saillies internes pour brasser le linge quand il tourne. Ce tambour est disposé dans une cuve contenant l'eau de lavage ou de rinçage. L'eau parvient au linge grâce aux perforations des parois du tambour. (DE-A-30 30 491)It is known that in such a washing machine the drum which contains the laundry to be washed, has perforated walls and, more often, internal projections for brewing the laundry when it rotates. This drum is placed in a tank containing the washing or rinsing water. The water reaches the laundry through the perforations in the walls of the drum. (DE-A-30 30 491)
Le coût du lavage dépend, notamment, de la quantité d'eau utilisée pour le lavage et le rinçage en raison, d'une part, du prix de l'eau elle-même et, d'autre part, du fait que la quantité d'énergie nécessaire pour chauffer l'eau est proportionnelle au volume d'eau. On a donc intérêt à réduire à un minimum ce volume d'eau.The cost of washing depends, in particular, on the quantity of water used for washing and rinsing due, on the one hand, to the price of the water itself and, on the other hand, to the fact that the quantity of energy required to heat the water is proportional to the volume of water. It is therefore beneficial to reduce this volume of water to a minimum.
L'invention permet d'atteindre ce résultat.The invention achieves this result.
Elle est caractérisée par les caractéristiques de la revendication revendication 1.It is characterized by the features of claim claim 1.
On a en effet constaté que la vitesse optimum de brassage du linge afin de le mouiller avec une faible quantité d'eau est inférieure à la vitesse nécessaire pour obtenir un lavage optimum. A titre d'exemple pour le lavage le tambour tourne à environ 50 tours par minute alors que pour le mouillage le tambour tourne à une vitesse d'environ 30 tours par minute. Il est vrai que dans le brevet US 4 344 198 est décrite une dans laquelle un tambour tourne à une vitesse plus faible lors du mouillage que lors du rinçage. Mais ce document prévoit, comme condition indispensable au bon mouillage du linge, que les diverses pièces soient introduites une par une dans le tambour. L'enseignement de ce brevet ne peut donc s'appliquer aux lave-linges d'usage domestique dans lesquels il n'est jamais prévu de mécanisme d'introduction des pièces de linge une par une dans le tambour. De plus l'invention repose sur la constatation qu'il n'était pas indispensable d'introduire les pièces de linge une par une dans le tambour pour obtenir le mouillage avec une faible quantité de liquide.It has in fact been found that the optimum speed of stirring the laundry in order to wet it with a small amount of water is less than the speed necessary to obtain an optimum washing. For example, for washing the drum rotates at around 50 revolutions per minute while for wetting the drum rotates at a speed of around 30 revolutions per minute. It is true that in the patent US 4,344,198 describes one in which a drum rotates at a lower speed during wetting than during rinsing. However, this document provides, as an essential condition for good wetting of the linen, that the various parts are introduced one by one into the drum. The teaching of this patent cannot therefore apply to washing machines for domestic use in which there is never provided a mechanism for introducing pieces of laundry one by one into the drum. In addition, the invention is based on the observation that it was not essential to introduce the pieces of laundry one by one into the drum to obtain wetting with a small amount of liquid.
Dans un mode de réalisation préféré on prévoit un moyen pour maintenir le niveau de l'eau dans la cuve à ladite hauteur au-dessus du fond du tambour par ouverture d'une électrovanne d'admission d'eau quand le niveau de cette dernière a baissé dans la cuve.In a preferred embodiment, means are provided for maintaining the level of water in the tank at said height above the bottom of the drum by opening a water intake solenoid valve when the level of the latter has dropped into the tank.
Egalement pour mouiller le linge dans de bonnes conditions, tout en consommant une quantité minimum d'eau, l'invention prévoit, selon un second de ses aspects, qui peut être utilisé indépendamment du premier, un lave-linge caractérisé par les caractéristiques de la revendication 7.Also to wet the laundry in good conditions, while consuming a minimum amount of water, the invention provides, according to a second of its aspects, which can be used independently of the first, a washing machine characterized by the characteristics of the claim 7.
Le processus de mouillage peut s'expliquer de la façon suivante : le niveau d'eau étant faible, la quantité d'eau introduite au cours de la première phase est insuffisante pour mouiller correctement le linge même si celui-ci absorbe toute l'eau qui se trouve au-dessus du fond du tambour. De plus, cette eau absorbée n'est pas répartie uniformément dans le linge ; certaines pièces peuvent même rester entièrement sèches. Le brassage par rotation à vitesse lente du tambour répartit le linge de façon quasi aléatoire. Dans ces conditions quand le tambour tourne à vitesse de centrifugation ou d'essorage, certaines pièces sèches de linge se trouvent plus éloignées de l'axe du tambour que d'autres pièces mouillées ; il en résulte qu'au cours de la centrifugation l'eau exprimée de la pièce de linge mouillé atteint le linge sec, ce qui mouille ce dernier. On comprend ainsi qu'il suffit d'un nombre limité d'essorages pour mouiller complètement le linge.The wetting process can be explained as follows: the water level being low, the quantity of water introduced during the first phase is insufficient to properly wet the laundry even if it absorbs all the water which is above the bottom of the drum. In addition, this absorbed water is not evenly distributed in the laundry; some parts may even stay completely dry. The mixing by slow rotation of the drum distributes the laundry almost randomly. Under these conditions when the drum rotates at centrifugation or spin speed, some dry pieces of laundry are further from the axis of the drum than other wet pieces; it follows that during centrifugation the water expressed from the wet laundry reaches the dry laundry, which wets the latter. It is thus understood that a limited number of spins is sufficient to completely wet the laundry.
D'autres caractéristiques et avantages de l'invention apparaîtront avec la description de certains de ses modes de réalisation, celle-ci étant effectuée en se référant aux dessins ci-annexés, sur lesquels :
- La figure 1 est un schéma montrant une cuve et un tambour de lave-linge au cours d'une phase de mouillage du linge,
- La figure 2 est un schéma analogue à celui de la figure 1 au cours d'une autre phase de mouillage du linge,
- La figure 3 est un schéma en coupe, selon un plan vertical passant par l'axe de rotation du tambour, d'une paroi de cuve d'une partie du tambour et d'un dispositif de détection d'eau à un niveau déterminé,
- La figure 4 est, à plus grande échelle, une coupe selon la ligne 4-4 de la figure 3 et,
- La figure 5 est un diagramme illustrant les variations de la vitesse de rotation du tambour en fonction du temps.
- FIG. 1 is a diagram showing a tank and a washing machine drum during a laundry wetting phase,
- FIG. 2 is a diagram similar to that of FIG. 1 during another phase of wetting the linen,
- FIG. 3 is a diagram in section, along a vertical plane passing through the axis of rotation of the drum, of a tank wall of a part of the drum and of a device for detecting water at a determined level,
- FIG. 4 is, on a larger scale, a section along line 4-4 of FIG. 3 and,
- FIG. 5 is a diagram illustrating the variations in the speed of rotation of the drum as a function of time.
On a représenté de façon très schématique sur les figures 1 et 2 un lave-linge qui comporte une cuve 10 à l'intérieur de laquelle tourne un tambour cylindrique 12 d'axe horizontal 20 délimité par des parois verticales 14 (figure 3). L'eau de lavage ou de rinçage est introduite dans la cuve grâce à une électrovanne 16. Ce lave-linge est du type domestique usuel c'est-à-dire qu'il comprend classiquement un programmateur pour que son fonctionnement soit entièrement automatique et diverses sécurités telle que celle qui interrompt complètement le fonctionnement lorsque le couvercle est ouvert.There is shown very schematically in Figures 1 and 2 a washing machine which comprises a
La paroi cylindrique 13 du tambour 12 est perforée pour permettre que l'eau 15 de la cuve pénètre dans le tambour et puisse ainsi imbiber le linge 14a introduit dans ce tambour. Comme usuel dans les lave-linges de type domestique le fonctionnement de la machine n'est prévu pour ne démarrer en principe qu'après introduction de toutes les pièces de linge dans le tambour. D'ailleurs ce fonctionnement, et notamment l'arrivée d'eau, ne peuvent intervenir lors de l'introduction du linge car, pour cette opération, le couvercle de la machine est nécessairement ouvert.The
Selon un aspect de l'invention la surface libre 40 de l'eau dans la cuve 10 est à une faible hauteur h, par exemple de l'ordre de 1,5 cm, au-dessus du fond 30 du tambour, dont le diamètre est de 44,5 cm environ dans l'exemple.According to one aspect of the invention, the
L'électrovanne 16 est fermée automatiquement quand cette surface libre a atteint ce niveau prédéterminé.The
A cet effet une paroi verticale 11 de la cuve 10 présente une ouverture 31 (figure 3) dont l'axe est pratiquement audit niveau prédéterminé, à hauteur h au-dessus du fond 30 du tambour. Cette ouverture est traversée par un bol 33, de forme générale cylindrique, établi par exemple en matière plastique, dont l'ouverture 41 est dans la cuve et dont le fond 34 est à l'extérieur de cette cuve. L'étanchéité entre la surface extérieure du bol 33 et les bords de l'ouverture 31 est assurée par un joint 32 recouvrant les deux faces de la paroi verticale 11 au voisinage des bords de l'ouverture 31 ainsi que les bords de cette ouverture et la surface externe du bol.To this end, a vertical wall 11 of the
Ce bol 33 contient, au voisinage du fond 34, un manchon cylindrique 35 d'axe horizontal parallèle à la paroi 11 et formant une intersection avec l'axe dudit bol ; ce manchon relie à étanchéité deux ouvertures 36 et 37 diamétralement opposées de la paroi du bol (figure 4). Le manchon 35 contient une thermistance 38 alimentée en courant électrique par une source de tension (non représentée) de valeur suffisante pour que cette thermistance soit chauffée par effet Joule. Dans l'exemple le manchon 35 est établi d'une seule pièce par moulage avec le reste du bol 33. L'épaisseur du manchon 35 est cependant inférieure à celle de la paroi du bol pour permettre un bon contact thermique entre , d'une part, l'eau qui baigne une partie de la surface externe du manchon 35 et, d'autre part, la thermistance 38 à l'intérieur du manchon, où l'eau ne pénètre pas.This
Quand l'eau entre en contact avec le manchon 35 elle refroidit sa paroi et donc la thermistance 38. Dans ces conditions la résistance électrique de cette thermistance varie. Cette variation de résistance est utilisée pour fournir à l'électrovanne 16 un signal de commande d'arrêt du remplissage. La disposition de la thermistance 38 dans un manchon 35 - sans contact direct avec l'eau - et dans un bol, la protège contre les projections d'eau et les turbulences résultant de la rotation du tambour et de l'introduction d'eau. En d'autres termes les risques de fausses détections sont diminués.When the water comes into contact with the
Comme l'eau n'est qu'à une faible hauteur h au-dessus du fond du tambour 30 seule une faible fraction du linge 14a est mouillée. C'est pourquoi on fait tourner le tambour 12 pour procéder au mouillage d'une plus grande partie du linge. Selon un aspect de l'invention cette vitesse de rotation est inférieure à la vitesse de rotation utilisée pour le brassage du linge en vue de son lavage ou de son rinçage. Dans l'exemple la vitesse de rotation du tambour pour le mouillage est de l'ordre de 30 tours par minute alors que la vitesse de rotation du tambour pour le lavage ou le rinçage est de l'ordre de 50 tours par minute.As the water is only at a low height h above the bottom of the
Comme le linge 14a absorbe de l'eau la surface libre de l'eau 15 dans la cuve 10 baisse et ainsi le manchon 35 n'est plus en contact avec l'eau froide. La température de la thermistance s'élève et sa résistance varie de nouveau. Cette nouvelle variation est utilisée pour ouvrir l'électrovanne 16 et maintenir constant le niveau de l'eau.As the
Pour améliorer le mouillage du linge et réduire encore la quantité d'eau utilisée, après une rotation pendant un temps t₁, de l'ordre de 5 minutes, du tambour 12 à la vitesse V₁ de l'ordre de 30 tours par minute (figure 5) on fait tourner le tambour à une vitesse de centrifugation ou essorage V₂ de l'ordre de 500 tours par minute. Au cours de cette centrifugation le linge est plaqué contre la surface interne de la paroi cylindrique 13 du tambour (figure 2). Certaines pièces de linge mouillé 45 sont, au cours de cette centrifugation, séparées de la paroi 13 par des pièces de linge sec 46 : la force centrifuge provoque alors l'expulsion d'une partie de l'eau contenue par la pièce 45 vers la pièce 46 qui absorbe de l'eau. Les pièces de linge mouillé 47 qui, au cours de la centrifugation, sont plaquées contre la paroi 13 rejettent de l'eau dans la cuve 10. Ainsi avant la nouvelle ouverture de l'électrovanne 16 la surface libre de l'eau a remonté en partie sans atteindre toutefois la hauteur h au-dessus du fond 30 du tambour. Dans l'exemple la centrifugation est effectuée pendant un temps de l'ordre de 30 secondes.To improve the wetting of the linen and further reduce the amount of water used, after a rotation for a time t₁, of the order of 5 minutes, of the
L'électrovanne 16 est ensuite de nouveau ouverte pour compléter le niveau jusqu'à ladite hauteur h et le tambour est alors mis en rotation à la vitesse V₁ d'environ 30 tours par minute. Un nouveau cycle de rotation à vitesse V₁ faible puis à vitesse V₂ de centrifugation est ensuite mis en oeuvre. On a constaté qu'il suffit d'environ une dizaine de tels cycles pour obtenir un mouillage homogène et suffisant du linge. Ce n'est qu'après ces divers cycles que le tambour tourne à la vitesse V₃ de l'ordre de 50 tours par minute pour le lavage ou le rinçage.The
On a aussi constaté que, pour obtenir un bon mouillage du linge, il n'était pas toujours indispensable d'effectuer des centrifugations si la vitesse de rotation du tambour est maintenue au cours de la phase de mouillage, à la vitesse V₁ de l'ordre de 30 tours par minute. Par exemple pour du linge de coton si le tambour tourne, pour le mouillage, à une vitesse de l'ordre de 50 tours par minute - qui est la vitesse de rotation utilisée pour le brassage en vue du lavage ou du rinçage - ce linge absorbe environ 1,3 litre d'eau par kilogramme. Par contre si, pour le mouillage, la vitesse de rotation est de 30 tours par minute ce linge absorbe environ 1,9 litre par kilogramme, ce qui est pratiquement égal à la saturation (2 litres par kilogramme). On pense que ce résultat est lié au fait que l'eau traverse mieux les parois du tambour à vitesse lente qu'à une vitesse de rotation de 50 tours par minute. De plus, on a observé que la faible vitesse de rotation provoque une bonne redistribution du linge, c'est-à-dire que les pièces de linge sec qui se trouvent au centre ont, à vitesse faible, plus de chance d'atteindre la périphérie, c'est-à-dire la paroi 13, que si la vitesse est plus élevée (50 tours par minute). Bien entendu ces pièces sèches, qui se trouvent alors à la périphérie, sont mouillées lorsqu'elles arrivent au fond du tambour.It has also been found that, in order to obtain good wetting of the linen, it is not always essential to carry out centrifugations if the speed of rotation of the drum is maintained during the wetting phase, at the speed V₁ of the order of 30 revolutions per minute. For example for cotton linen if the drum rotates, for wetting, at a speed of the order of 50 revolutions per minute - which is the speed of rotation used for brewing for washing or rinsing - this linen absorbs about 1.3 liters of water per kilogram. On the other hand if, for wetting, the rotational speed is 30 revolutions per minute, this linen absorbs approximately 1.9 liters per kilogram, which is practically equal to saturation (2 liters per kilogram). It is believed that this result is related to the fact that the water flows through better the walls of the drum at slow speed than at a rotation speed of 50 revolutions per minute. In addition, it has been observed that the low speed of rotation causes a good redistribution of the laundry, that is to say that the pieces of dry laundry which are in the center are, at low speed, more likely to reach the periphery, that is to say the
La vitesse de rotation pour le lavage étant de 50 tours par minute on a constaté qu'on obtenait un bon mouillage quand la vitesse de rotation est inférieure à 35 tours par minute, et de préférence, comprise entre 15 et 35 tours par minute.The rotational speed for washing being 50 revolutions per minute it has been found that good wetting is obtained when the rotational speed is less than 35 revolutions per minute, and preferably between 15 and 35 revolutions per minute.
Si on fait intervenir des centrifugations à une vitesse V₂, par exemple de l'ordre de 500 tours par minute, il n'est pas toujours indis pensable, pour le mouillage du linge, que la vitesse V₁ soit inférieure à la vitesse V₃ de brassage pour le lavage ou le rinçage.If centrifugations are carried out at a speed V₂, for example of the order of 500 revolutions per minute, it is not always essential, for wetting the laundry, that the speed V₁ is less than the speed V₃ of stirring for washing or rinsing.
Les exemples numériques qui ont été donnés se rapportent à un tambour de diamètre 45 cm environ. Pour des diamètres différents on notera que les hauteurs d'eau varient de façon proportionnelle au diamètre tandis que les vitesses de rotation varient de façon inversement proportionnelle à ce diamètre.The numerical examples which have been given relate to a drum with a diameter of approximately 45 cm. For different diameters, it will be noted that the heights of water vary proportionally to the diameter while the rotational speeds vary inversely proportional to this diameter.
Claims (9)
- A household washing machine comprising a perforated drum (12) adapted to receive the washing charge and rotating about a horizontal axis in the interior of a tub (10) adapted to receive the water (15) as well as means in order to introduce the water (15) into the tub as far as a level (h) above the bottom (30) of the drum (12), and control means for the rotation of the drum at a speed of rotation (V₃) for the washing or the rinsing of the charge and at a speed, which is higher, for spinning, characterized in that the means for the introduction of the water are such that the water (15) is introduced into the tub (10) as far as a level (h) above the bottom (30) of the drum (12) of the order of 3% of the diameter of the latter and in that, in order to moisten the washing charge, the means for the control of the rotation of the drum make it possible to rotate the latter at a speed (V₁) below the speed of rotation (V₃) utilized for the washing or the rinsing.
- The washing machine as claimed in claim 1, characterized in that the means for the control of the speed of rotation of the drum make it possible for the speed (V₁) of rotation of the drum (12) for the washing or the rinsing to be of the order of 50 rpm and that for the speed of rotation (V₁) of the drum for moistening to be between 15 and 35 rpm.
- The washing machine as claimed in claim 2, characterized in that the means for the control of the rotation of the drum make it possible for the speed (V₁) of rotation of the drum for moistening to be of the order of 30 rpm for a drum with a diameter of approximately 45 cm.
- The washing machine as claimed in claim 1, characterized in that it comprises means (16 and 28) in order to keep the level of the water in the said tub at the said level (h) above the bottom (30) of the drum by the opening of a solenoid valve (16) for the admission of the water when the level of the water in the tub has gone down.
- The washing machine 4, characterized in that, in order to detect the presence or the absence of the water at the predetermined level, it comprises a thermistor (30) heated by the Joule effect and whose temperature goes down when the water reaches the predetermined level, at the said level (h) above the bottom (30) of the drum (12).
- The washing machine 5, characterized in that the thermistor (38) is positioned in a socket (33 and 35), preferably integral with a vertical wall (11) of the tub (10), in such a manner that this thermistor is protected against splashing water and spray owing to the rotation of the drum and to the introduction of the water.
- A household washing machine comprising a perforated drum (12) adapted to receive a charge of washing and rotating about a horizontal axis in the interior of a tub (10) adapted to receive the water (15) and means for introducing water (15) into the tub up to a level (h) above the bottom (30) of the drum (12), and control means for the rotation of the drum at a speed (V₃) of rotation for the washing or the rinsing of the charge of washing and at a speed, which is higher, for spinning, characterized in that the means for introducing the water are such that the water (15) is introduced into the tub (10) as far as a level (h) above the bottom (30) of the drum (12) of the order of 3% of the diameter of the latter and in that, in order to moisten the washing charge, the control means for the rotation of the drum make it possible to rotate it firstly at a speed (V₃ or V₁) equal to or less than the speed of rotation of the drum for washing or for rinsing, then to rotate it at a spin speed (V₂), such successive phases of rotation at a slow speed and then at a spin speed being repeated a plurality of times.
- The washing machine as claimed in claim 7, characterized in that the control means for the rotation of the drum make possible operation such that, prior to the washing, the drum firstly rotates at a low speed (V₁) of rotation lower than the speed of rotation for the washing or the rinsing during a period of approximately 5 minutes, and then at a spin speed during approximately 30 seconds.
- The washing machine as claimed in claim 7 or claim 8, characterized in that the control means for the rotation of the drum make it possible for the number of successive rotation phases to be of the order of a dozen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT85400161T ATE70574T1 (en) | 1984-02-17 | 1985-01-31 | WASHING MACHINE WITH WATER LEVEL SLIGHTLY ABOVE THE BASE OF THE DRUM. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8402439A FR2559798B1 (en) | 1984-02-17 | 1984-02-17 | LAUNDRY MACHINE WITH A LOW HEIGHT IN THE TANK ABOVE THE BOTTOM OF THE DRUM |
| FR8402439 | 1984-02-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0159204A1 EP0159204A1 (en) | 1985-10-23 |
| EP0159204B1 true EP0159204B1 (en) | 1991-12-18 |
Family
ID=9301144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP85400161A Expired - Lifetime EP0159204B1 (en) | 1984-02-17 | 1985-01-31 | Laundry washer, the tub containing water at a low level just above the bottom of the drum |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0159204B1 (en) |
| AT (1) | ATE70574T1 (en) |
| DE (1) | DE3584904D1 (en) |
| ES (1) | ES8606549A1 (en) |
| FR (1) | FR2559798B1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE36359T1 (en) * | 1986-04-12 | 1988-08-15 | Wfk Testgewebe Gmbh | METHOD OF WASHING WOOL ITEMS. |
| DE3642578A1 (en) * | 1986-12-12 | 1988-06-23 | Bosch Siemens Hausgeraete | WASHING PROCEDURE |
| DE3707147A1 (en) * | 1987-03-06 | 1988-09-15 | Henkel Kgaa | METHOD FOR WASHING AND / OR RINSING TEXTILE MATERIALS, AND DEVICES SUITABLE FOR THIS |
| FR2655363B1 (en) * | 1989-12-05 | 1994-08-26 | Ciapem | WASHING MACHINE HAVING A ROTATION SPEED OF THE DRUM VARIED ACCORDING TO THE LOAD. |
| JPH08299658A (en) * | 1995-05-12 | 1996-11-19 | Toshiba Corp | Drum type washing machine |
| ES2146130B1 (en) * | 1995-12-27 | 2001-02-16 | Fagor S Coop | CLOTHING WASHING METHOD IN A DOMESTIC WASHER. |
| DE102006018539A1 (en) * | 2006-04-21 | 2007-10-25 | BSH Bosch und Siemens Hausgeräte GmbH | Dishwasher, in particular domestic dishwasher |
| JP5023900B2 (en) | 2006-09-05 | 2012-09-12 | 株式会社Ｓｕｍｃｏ | Epitaxial silicon wafer |
| EP2578736A1 (en) * | 2011-10-03 | 2013-04-10 | Electrolux Home Products Corporation N.V. | Method for washing laundry in a laundry washing machine |
| PL2792779T3 (en) * | 2013-04-18 | 2015-12-31 | Whirlpool Co | Method for washing laundry in a spray washing machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2920492A1 (en) * | 1978-06-12 | 1979-12-20 | Schwarzenberg Waschgeraete | Programme controlled washing machine - uses microprocessors to derive parameters necessary to wash laundry using min. water, energy and time |
| DE3030491A1 (en) * | 1980-08-12 | 1982-02-25 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Automatic liquor vol. control system for washing machine - times rates of increase of water level to estimate load size |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB775246A (en) * | 1954-08-03 | 1957-05-22 | Westinghouse Electric Int Co | Improvements in or relating to the washing of fabrics or the like |
| DE1438178A1 (en) * | 1962-05-17 | 1969-05-14 | Siemens Elektrogeraete Gmbh | Device for controlling a time program for self-employed household machines |
| AT243727B (en) * | 1961-12-30 | 1965-11-25 | Constructa Werke Ges Mit Besch | Program-controlled washing machine and spin dryer |
| US3197980A (en) * | 1963-09-06 | 1965-08-03 | Whirlpool Co | Automatic laundry apparatus having a super wash cycle |
| US3707857A (en) * | 1971-09-20 | 1973-01-02 | Whirlpool Co | Multi-purpose sensor assembly for automatic washer |
| SE443004B (en) * | 1979-05-12 | 1986-02-10 | Hoesch Werke Ag | KIT FOR WASHING LAUNDRY IN A CYLINDER WASHER WITH LOW FLUID / WASHING LEVEL IN THE DRUM |
| DE3324481A1 (en) * | 1983-07-07 | 1985-01-24 | Miele & Cie GmbH & Co, 4830 Gütersloh | WASHING METHOD FOR A PROGRAM-CONTROLLED DRUM WASHING MACHINE |
-
1984
- 1984-02-17 FR FR8402439A patent/FR2559798B1/en not_active Expired
-
1985
- 1985-01-31 AT AT85400161T patent/ATE70574T1/en not_active IP Right Cessation
- 1985-01-31 DE DE8585400161T patent/DE3584904D1/en not_active Expired - Fee Related
- 1985-01-31 EP EP85400161A patent/EP0159204B1/en not_active Expired - Lifetime
- 1985-02-15 ES ES540453A patent/ES8606549A1/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2920492A1 (en) * | 1978-06-12 | 1979-12-20 | Schwarzenberg Waschgeraete | Programme controlled washing machine - uses microprocessors to derive parameters necessary to wash laundry using min. water, energy and time |
| DE3030491A1 (en) * | 1980-08-12 | 1982-02-25 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | Automatic liquor vol. control system for washing machine - times rates of increase of water level to estimate load size |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2559798B1 (en) | 1986-11-07 |
| EP0159204A1 (en) | 1985-10-23 |
| ES8606549A1 (en) | 1986-04-16 |
| ES540453A0 (en) | 1986-04-16 |
| DE3584904D1 (en) | 1992-01-30 |
| FR2559798A1 (en) | 1985-08-23 |
| ATE70574T1 (en) | 1992-01-15 |
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