EP1008685A1 - Laundry washing method and washing machine using this method - Google Patents

Laundry washing method and washing machine using this method Download PDF

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Publication number
EP1008685A1
EP1008685A1 EP99403050A EP99403050A EP1008685A1 EP 1008685 A1 EP1008685 A1 EP 1008685A1 EP 99403050 A EP99403050 A EP 99403050A EP 99403050 A EP99403050 A EP 99403050A EP 1008685 A1 EP1008685 A1 EP 1008685A1
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EP
European Patent Office
Prior art keywords
drum
rotation
speed
laundry
substantially constant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99403050A
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German (de)
French (fr)
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EP1008685B1 (en
Inventor
André Maziere
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Electrolux Laundry Systems France SNC
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Electrolux Systemes de Blanchisserie SNC
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Publication of EP1008685A1 publication Critical patent/EP1008685A1/en
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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
    • 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
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/02—Rotary receptacles, e.g. drums
    • D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis
    • D06F37/08—Partitions

Definitions

  • the invention relates to a method for washing laundry, using a washing machine equipped with a rotary drum, of substantially horizontal axis, internally delimiting two separate compartments by a radial partition passing through said axis.
  • the invention also relates to a washing machine. implementing this process.
  • the laundry washing process and the washing machine according to the invention apply in particular to semi-industrial washing plants and industrial, in which loads of laundry relatively large are processed in each cycle of washing.
  • washing machines In semi-industrial washing plants and industrial, we frequently use washing machines in which two loads of laundry are placed simultaneously in two compartments of a rotary drum, of substantially horizontal axis. In such washing machines, the two compartments are separate by a radial partition passing through the axis of the drum.
  • the washing of the laundry is obtained by driving the drum in rotation by means of an electric motor, controlled by a microprocessor through a dimmer speed.
  • the speed of drum rotation gradually increases according to a given ramp, until a speed step predetermined is reached.
  • This speed step is usually preset at the factory. It corresponds to a angular speed of the drum such that the laundry is subject to radial acceleration G generally between 0.4 g and 0.5 g, where g represents the acceleration of gravity.
  • references 1 and 2 designate respectively the tank and the drum of a washing machine of the aforementioned type.
  • Drum 2 is divided internally in two compartments 3a and 3b by a radial partition 4 passing through the axis substantially horizontal of the drum.
  • a load of laundry 4a and 4b is placed respectively in each of the compartments 3a and 3b.
  • each of the laundry loads 4a and 4b is subject simultaneously with the force of gravity Pa, Pb, with the force centrifugal Ca, Cb and the reaction forces exerted through the walls. Due to the angular speed relatively limited drum 2, the force of gravity Pa, Pb, oriented vertically downwards, is significantly greater than the centrifugal force Ca, Cb, oriented radially outwards.
  • partition 4 tilts gradually in the same direction.
  • the laundry load 4a located in the upper compartment 3a then descends gradually, by simply sliding (arrow FG) the along the partition 4, up to the angle formed between this partition and the circumferential wall of the drum 2, of the downstream side with respect to the direction of rotation F1 of this one.
  • the laundry load 4b located in the lower compartment 3b goes down gradually along the circumferential wall of the drum 2, while rolling on itself (arrow FR), up to come to place in the corner formed between this wall and partition 4, on the upstream side relative to the direction of rotation F1 of the drum.
  • the subject of the invention is a washing process of laundry using a washing machine for two compartments and allowing to improve in a very sensitive the effectiveness of washing without risk of linen orbiting.
  • the drum is rotated at a angular speed such that the laundry is subjected to a substantially constant radial acceleration G, the average value is between approximately 0.80 g and about 0.90 g.
  • the speed of rotation of the drum and a drive motor is controlled this one, so as to make the speed measured substantially constant.
  • This embodiment applies in particular to the case where the engine drives the drum in rotation by means of transmission with sliding, for example using a smooth belt.
  • the invention applies to a washing machine comprising a tank 10, in which is mounted a rotary drum 12, of substantially horizontal axis. More precisely, the rotary drum 12 is divided internally in two compartments 14a and 14b by a radial partition 16 passing through the axis of the drum.
  • the tank 10 is equipped with two access doors 18 and the drum 12 is also equipped with two doors (not shown) opening into each of the compartments 14a and 14b and likely to be brought in front of doors 18, when the drum stops, for example thanks to a indexing system (not shown).
  • the drum 12 comprises two end walls, disc-shaped, as well as a circumferential wall 20 provided with perforations (not represented).
  • the circumferential wall 20 of the drum 12 is internally equipped with ribs 22, of section triangular, which tend to oppose the sliding of the laundry along the wall 20.
  • the washing machine according to the invention is also equipped with control means, designed to drive the drum 12 rotating at an angular speed such that the two loads of laundry 24a, 24b, placed in each of compartments 14a and 14b, either subjected to a radial acceleration G substantially constant, whose average value is between about 0.70 g and about 0.95 g, where g represents the acceleration of gravity.
  • the average value of the acceleration radial G is more precisely between approximately 0.80 g and approximately 0.90 g.
  • this original characteristic of the washing machine according to the invention ensures a fall of laundry loads 24a, 24b contained in each of compartments 14a and 14b, over a height close to the diameter of the drum 12, each time it rotates half a turn.
  • laundry loads 24a and 24b peel off from the circumferential wall 20 of the drum when the corners in which they are are facing up.
  • laundry loads 24a and 24b fall then by gravity (arrows FCa and FCb) in the corners opposite of their respective compartments, on a height practically equal to the diameter of the drum. A such a fall occurs every time the drum make a U-turn. Much more washing effective than in washing machines of the same type of art anterior is thus assured.
  • the drum 12 is rotated by an electric motor 26, through susceptible means of transmission to induce a certain slip.
  • the transmission means include a belt smooth drive 28, which runs on both a pulley fixed to the output shaft of the motor 26 and on a pulley fixed to the axis of the drum 12.
  • the electric motor 26 is supplied with current electric through a frequency converter 30 controlled by a microprocessor 32.
  • This arrangement classic ensures the speed increase of drum 12 and then maintaining that speed at a predetermined level.
  • the character approximate speed step thus reached increased by the possible existence of a shift in transmission, does not ensure regulation of the drum speed at the desired optimized value.
  • control means classics that have just been described are advantageously supplemented by means closed-loop speed control.
  • the disc 34 preferably comprises at least thirty teeth regularly distributed around its periphery.
  • the pulse sensor 36 delivers a representative signal the speed of rotation of the drum 12.
  • This signal can be transmitted either directly to means control integrated into the frequency converter 30, as illustrated in solid lines in FIG. 3, either to a servo software equipping the microprocessor 32, as illustrated in lines discontinuous.
  • the signal speed is operated so as to keep constant the speed of rotation of the drum 12, at a level such that the radial acceleration G applied to the loads of laundry remains permanently at the value displayed, for example of 0.85 g, with an accuracy at least equal to 0.1 g.
  • FIG 4 there is shown a second embodiment of the control means ensuring the rotary drive of the drum 12.
  • This second embodiment essentially applies to the case where the transmission between the electric motor 26 and the drum 12 is provided by transmission means without sliding.
  • These means of transmission without slip may include a belt notched 38a, engaged at the same time on a notched pulley attached to the output shaft of the motor 26 and on a Toothed pulley fixed to the axis of the drum 12.
  • the power supply of the motor 26 is carried out through a variator of frequency 30 controlled by a microprocessor 32.
  • the speed control can be done in this case by measuring the speed of electric motor rotation 26.
  • the washing machine then comprises means to measure the speed of rotation of the motor 26, constituted here by a tachometer 36a.
  • the tachometer 36a delivers an output signal representative of the speed of motor rotation 26.
  • this signal can be transmitted either directly to a system control system integrated into the frequency converter 30, as shown in solid lines in FIG. 4, either to a servo software equipping the microprocessor 32, as shown in lines discontinuous.

Abstract

The washing procedure consists of placing the washing (24a, 24b) in two compartments (14a, 14b) of a drum which rotates about a horizontal axis and is divided by a radial partition (16). The drum is rotated at an angular velocity which subjects the washing to a more or less constant radial acceleration. The drum is rotated by a motor operating at a more or less constant speed The drum is rotated at an angular velocity which subjects the washing to a more or less constant radial acceleration with a mean value of about 0.70 - 0.95g, where g is the acceleration due to gravity.

Description

Domaine techniqueTechnical area

L'invention concerne un procédé de lavage de linge, mettant en oeuvre un lave-linge équipé d'un tambour rotatif, d'axe sensiblement horizontal, délimitant intérieurement deux compartiments séparés par une cloison radiale passant par ledit axe.The invention relates to a method for washing laundry, using a washing machine equipped with a rotary drum, of substantially horizontal axis, internally delimiting two separate compartments by a radial partition passing through said axis.

L'invention concerne également un lave-linge mettant en oeuvre ce procédé.The invention also relates to a washing machine. implementing this process.

Le procédé de lavage de linge et le lave-linge conformes à l'invention s'appliquent notamment aux installations de lavage semi-industrielles et industrielles, dans lesquelles des charges de linge relativement importantes sont traitées à chaque cycle de lavage.The laundry washing process and the washing machine according to the invention apply in particular to semi-industrial washing plants and industrial, in which loads of laundry relatively large are processed in each cycle of washing.

Etat de la techniqueState of the art

Dans les installations de lavage semi-industrielles et industrielles, on utilise fréquemment des lave-linge dans lesquels deux charges de linge sont placées simultanément dans deux compartiments d'un tambour rotatif, d'axe sensiblement horizontal. Dans de tels lave-linge, les deux compartiments sont séparés par une cloison radiale passant par l'axe du tambour.In semi-industrial washing plants and industrial, we frequently use washing machines in which two loads of laundry are placed simultaneously in two compartments of a rotary drum, of substantially horizontal axis. In such washing machines, the two compartments are separate by a radial partition passing through the axis of the drum.

Dans les lave-linge existants de ce type, le lavage du linge est obtenu en entraínant le tambour en rotation au moyen d'un moteur électrique, commandé par un microprocesseur au travers d'un variateur de vitesse. Lors de la mise en route, la vitesse de rotation du tambour augmente progressivement selon une rampe donnée, jusqu'à ce qu'un palier de vitesse prédéterminé soit atteint. Ce palier de vitesse est habituellement préréglé en usine. Il correspond à une vitesse angulaire du tambour telle que le linge soit soumis à une accélération radiale G généralement comprise entre 0,4 g et 0,5 g, où g représente l'accélération de la pesanteur.In existing washing machines of this type, the washing of the laundry is obtained by driving the drum in rotation by means of an electric motor, controlled by a microprocessor through a dimmer speed. During start-up, the speed of drum rotation gradually increases according to a given ramp, until a speed step predetermined is reached. This speed step is usually preset at the factory. It corresponds to a angular speed of the drum such that the laundry is subject to radial acceleration G generally between 0.4 g and 0.5 g, where g represents the acceleration of gravity.

Comme le montrent les figures 1A et 1B des dessins annexés, les caractéristiques d'un tel lave-linge ne permettent pas d'assurer un lavage efficace du linge.As shown in Figures 1A and 1B of attached drawings, the characteristics of such washing machines do not provide washing efficient laundry.

Sur ces figures, les références 1 et 2 désignent respectivement la cuve et le tambour d'un lave-linge du type précité. Le tambour 2 est divisé intérieurement en deux compartiments 3a et 3b par une cloison radiale 4 passant par l'axe sensiblement horizontal du tambour. Une charge de linge 4a et 4b est placée respectivement dans chacun des compartiments 3a et 3b.In these figures, references 1 and 2 designate respectively the tank and the drum of a washing machine of the aforementioned type. Drum 2 is divided internally in two compartments 3a and 3b by a radial partition 4 passing through the axis substantially horizontal of the drum. A load of laundry 4a and 4b is placed respectively in each of the compartments 3a and 3b.

Lorsque le tambour 2 tourne autour de son axe dans le sens de la flèche F1 sur les figures 1A et 1B, chacune des charges de linge 4a et 4b est soumise simultanément à la force de gravité Pa, Pb, à la force centrifuge Ca, Cb et aux forces de réaction exercées par les parois. Du fait de la vitesse angulaire relativement limitée du tambour 2, la force de gravité Pa, Pb, orientée verticalement vers le bas, est sensiblement supérieure à la force centrifuge Ca, Cb, orientée radialement vers l'extérieur.When the drum 2 rotates around its axis in the direction of arrow F1 in FIGS. 1A and 1B, each of the laundry loads 4a and 4b is subject simultaneously with the force of gravity Pa, Pb, with the force centrifugal Ca, Cb and the reaction forces exerted through the walls. Due to the angular speed relatively limited drum 2, the force of gravity Pa, Pb, oriented vertically downwards, is significantly greater than the centrifugal force Ca, Cb, oriented radially outwards.

Dans ces conditions, lorsque la cloison radiale 4 passe par un état sensiblement horizontal, les charges de linge 4a et 4b, alors situées respectivement dans le compartiment supérieur 3a et dans le compartiment inférieur 3b, occupent les positions illustrées sur la figure 1A. Plus précisément, la charge de linge 4a est alors placée dans l'angle formé entre la cloison 4 et la paroi circonférentielle du tambour 2, du côté amont par rapport au sens de rotation F1 de ce dernier. Par ailleurs, la charge de linge 4b située dans le compartiment inférieur 3b repose sur la paroi circonférentielle du tambour 2, en un emplacement relativement proche de l'angle formé entre cette paroi et la cloison 4, du côté aval par rapport au sens de rotation F1.Under these conditions, when the radial partition 4 goes through a substantially horizontal state, the laundry loads 4a and 4b, then located respectively in the upper compartment 3a and in the lower compartment 3b, occupy the positions illustrated in Figure 1A. More specifically, the load of linen 4a is then placed in the formed angle between the partition 4 and the circumferential wall of the drum 2, on the upstream side with respect to the direction of F1 rotation of the latter. In addition, the burden of laundry 4b located in the lower compartment 3b rests on the circumferential wall of the drum 2, in a location relatively close to the angle formed between this wall and the partition 4, on the downstream side by relation to the direction of rotation F1.

Comme l'illustre la figure 1B, au fur et à mesure que la rotation du tambour 2 se poursuit dans le sens de la flèche F1, la cloison 4 s'incline progressivement dans le même sens. Compte tenu du caractère relativement limité de la force centrifuge appliquée sur le linge, par rapport au poids de celui-ci, la charge de linge 4a située dans le compartiment supérieur 3a descend alors progressivement, par simple glissement (flèche FG) le long de la cloison 4, jusqu'à l'angle formé entre cette cloison et la paroi circonférentielle du tambour 2, du côté aval par rapport au sens de rotation F1 de celui-ci. Dans le même temps, la charge de linge 4b située dans le compartiment inférieur 3b descend progressivement le long de la paroi circonférentielle du tambour 2, en roulant sur elle-même (flèche FR), jusqu'à venir se placer dans le coin formé entre cette paroi et la cloison 4, du côté amont par rapport au sens de rotation F1 du tambour.As illustrated in Figure 1B, as and as the rotation of the drum 2 continues in the direction of arrow F1, partition 4 tilts gradually in the same direction. Given the relatively limited centrifugal force applied to the laundry, relative to the weight of this one, the laundry load 4a located in the upper compartment 3a then descends gradually, by simply sliding (arrow FG) the along the partition 4, up to the angle formed between this partition and the circumferential wall of the drum 2, of the downstream side with respect to the direction of rotation F1 of this one. At the same time, the laundry load 4b located in the lower compartment 3b goes down gradually along the circumferential wall of the drum 2, while rolling on itself (arrow FR), up to come to place in the corner formed between this wall and partition 4, on the upstream side relative to the direction of rotation F1 of the drum.

Dans les lave-linge existants de ce type, la rotation du tambour 2 se traduit donc simplement par un déplacement des deux charges de linge 4a et 4b successivement par glissement le long de la cloison radiale 4 et par glissement et roulement le long de la paroi circonférentielle du tambour 2.In existing washing machines of this type, the rotation of the drum 2 therefore simply results in a displacement of the two loads of linen 4a and 4b successively by sliding along the partition radial 4 and by sliding and rolling along the circumferential wall of the drum 2.

Cependant, il est établi que l'efficacité de lavage d'un lave-linge découle essentiellement du nombre de chutes subies par le linge à l'intérieur du tambour rotatif et de la hauteur de ces chutes. Plus précisément, le lavage est d'autant plus efficace que le linge subit un nombre de chutes important et sur une hauteur aussi grande que possible. De ce point de vue, les lave-linge existants dont la cuve est séparée en deux compartiments par une cloison radiale présentent donc une efficacité de lavage très peu satisfaisante.However, it is established that the effectiveness of washing of a washing machine mainly results from number of falls sustained by the laundry inside the rotating drum and the height of these falls. More specifically, washing is all the more effective as laundry undergoes a significant number of falls and on a height as large as possible. From this point of view, existing washing machines with a separate tank two compartments with a radial partition have therefore a very unsatisfactory washing efficiency.

Il est à noter que ce problème est spécifique aux lave-linge dont la cuve est divisée en deux compartiments par une cloison radiale. En effet, à la vitesse de rotation habituelle du tambour, cette cloison s'oppose pratiquement à toute chute du linge, comme on l'a expliqué en référence aux figures 1a et 1b. Dans les lave-linge dépourvus d'une telle cloison et pour une même vitesse de rotation du tambour, la charge de linge unique contenue dans celui-ci subit des chutes répétées.Note that this problem is specific washing machines, the tub of which is divided in two compartments by a radial partition. Indeed, at the usual drum speed, this partition is practically opposed to any fall of the linen, as explained with reference to Figures 1a and 1b. In washing machines without such a partition and for the same drum rotation speed, the single load of laundry contained therein repeated falls.

Par ailleurs, il est important de noter qu'une "satellisation" du linge, c'est-à-dire son blocage contre la paroi circonférentielle du tambour lorsque celui-ci effectue un tour complet, doit impérativement être évitée. Un tel phénomène se produit lorsque l'accélération radiale G appliquée sur le linge atteint 1 g. Furthermore, it is important to note that a "orbiting" of the laundry, that is to say its blocking against the circumferential wall of the drum when this one makes a complete turn, must imperatively be avoided. Such a phenomenon occurs when the radial acceleration G applied to the laundry reached 1 g.

Exposé de l'inventionStatement of the invention

L'invention a pour objet un procédé de lavage de linge mettant en oeuvre un lave-linge à deux compartiments et permettant d'améliorer de façon très sensible l'efficacité du lavage sans risque de satellisation du linge.The subject of the invention is a washing process of laundry using a washing machine for two compartments and allowing to improve in a very sensitive the effectiveness of washing without risk of linen orbiting.

Conformément à l'invention, ce résultat est obtenu au moyen d'un procédé de lavage de linge, dans lequel :

  • on place le linge dans deux compartiments délimités à l'intérieur d'un tambour rotatif, d'axe sensiblement horizontal, par une cloison radiale passant par ledit axe ; et
  • on entraíne le tambour en rotation autour de son axe ;
caractérisé en ce qu'on entraíne le tambour en rotation à une vitesse angulaire telle que le linge soit soumis à une accélération radiale G sensiblement constante, de valeur moyenne comprise entre environ 0,70 g et environ 0,95 g, où g représente l'accélération de la pesanteur.In accordance with the invention, this result is obtained by means of a laundry washing process, in which:
  • the linen is placed in two compartments delimited inside a rotary drum, of substantially horizontal axis, by a radial partition passing through said axis; and
  • the drum is rotated about its axis;
characterized in that the drum is rotated at an angular speed such that the laundry is subjected to a substantially constant radial acceleration G, of average value between about 0.70 g and about 0.95 g, where g represents l 'gravity acceleration.

En soumettant le linge à une telle accélération radiale, on est pratiquement assuré que chacune des deux charges de linge placées dans le tambour subit une chute à chaque fois que le tambour tourne d'un demi-tour. De plus, chaque chute s'effectue sur une hauteur proche du diamètre du tambour. Par conséquent, un lavage efficace du linge est obtenu.By subjecting laundry to such acceleration radial, we are practically certain that each of the two loads of laundry placed in the drum undergoes a fall every time the drum turns turn around. In addition, each fall takes place on a height close to the diameter of the drum. Therefore, efficient washing of the linen is obtained.

De plus, étant donné que l'accélération angulaire à laquelle est soumis le linge reste, dans tous les cas, inférieure à 1 g, il n'existe aucun risque de satellisation du linge.In addition, since the acceleration angle to which the laundry is subjected remains, in all cases, less than 1 g, there is no risk of linen laundering.

Dans un mode de réalisation préféré de l'invention, on entraíne le tambour en rotation à une vitesse angulaire telle que le linge soit soumis à une accélération radiale G sensiblement constante, dont la valeur moyenne est comprise entre environ 0,80 g et environ 0,90 g.In a preferred embodiment of the invention, the drum is rotated at a angular speed such that the laundry is subjected to a substantially constant radial acceleration G, the average value is between approximately 0.80 g and about 0.90 g.

De préférence, on entraíne le tambour en rotation à une vitesse angulaire sensiblement constante.Preferably, we drive the drum in rotation at substantially angular speed constant.

Dans un premier mode de réalisation de l'invention, on mesure alors la vitesse de rotation du tambour et on asservit un moteur d'entraínement de celui-ci, de façon à rendre la vitesse mesurée sensiblement constante. Ce mode de réalisation s'applique notamment au cas où le moteur entraíne le tambour en rotation par des moyens de transmission avec glissement, utilisant par exemple une courroie lisse.In a first embodiment of the invention, the speed of rotation of the drum and a drive motor is controlled this one, so as to make the speed measured substantially constant. This embodiment applies in particular to the case where the engine drives the drum in rotation by means of transmission with sliding, for example using a smooth belt.

Dans un autre mode de réalisation de l'invention, appliqué au cas où le tambour est entraíné en rotation par un moteur au travers de moyens de transmission sans glissement, utilisant par exemple une courroie crantée, on mesure la vitesse de rotation du moteur et on asservit celui-ci, de façon à rendre la vitesse mesurée sensiblement constante.In another embodiment of the invention, applied to the case where the drum is driven in rotation by a motor through means of non-slip transmission, for example using a toothed belt, the speed of rotation of the motor and we slave it, so as to make the substantially constant measured speed.

L'invention a aussi pour objet un lave-linge comprenant :

  • un tambour rotatif, d'axe sensiblement horizontal, délimitant intérieurement deux compartiments séparés par une cloison radiale passant par ledit axe ; et
  • des moyens de commande pour entraíner le tambour en rotation autour de son axe ;
caractérisé en ce que lesdits moyens de commande entraínent le tambour en rotation à une vitesse angulaire telle que le linge soit soumis à une accélération radiale G sensiblement constante, dont la valeur moyenne est comprise entre environ 0,70 g et environ 0,95 g, où g représente l'accélération de la pesanteur.The invention also relates to a washing machine comprising:
  • a rotary drum, of substantially horizontal axis, internally delimiting two compartments separated by a radial partition passing through said axis; and
  • control means for driving the drum in rotation about its axis;
characterized in that said control means drive the drum in rotation at an angular speed such that the laundry is subjected to a substantially constant radial acceleration G, the average value of which is between approximately 0.70 g and approximately 0.95 g, where g represents the acceleration of gravity.

Brève description des dessinsBrief description of the drawings

On décrira à présent, à titre d'exemples non limitatifs, deux modes de réalisation préférés de l'invention, en se référant aux dessins annexés, dans lesquels :

  • les figures 1A et 1B, déjà décrites, illustrent schématiquement le déplacement de deux charges de linge reçues dans les deux compartiments d'un lave-linge à cloison radiale selon l'art antérieur ;
  • les figures 2A et 2B sont des vues comparables aux figures 1A et 1B, illustrant les déplacements des deux charges de linge dans le tambour de la machine selon l'invention ;
  • la figure 3 représente de façon très schématique, dans une lave-linge conforme à l'invention, un premier mode de réalisation des moyens de commande asservis permettant d'entraíner le tambour en rotation à une vitesse angulaire régulée ; et
  • la figure 4 est une vue comparable à la figure 3 illustrant un deuxième mode de réalisation de l'invention.
Two preferred embodiments of the invention will now be described, by way of nonlimiting examples, with reference to the appended drawings, in which:
  • FIGS. 1A and 1B, already described, schematically illustrate the movement of two loads of laundry received in the two compartments of a washing machine with a radial partition according to the prior art;
  • FIGS. 2A and 2B are views comparable to FIGS. 1A and 1B, illustrating the movements of the two loads of laundry in the drum of the machine according to the invention;
  • Figure 3 shows very schematically, in a washing machine according to the invention, a first embodiment of the control means for driving the rotating drum at a regulated angular speed; and
  • Figure 4 is a view comparable to Figure 3 illustrating a second embodiment of the invention.

Description détaillée de modes de réalisation préférés de l'inventionDetailed description of preferred embodiments of the invention

Comme l'illustrent en particulier les figures 2A et 2B, l'invention s'applique à un lave-linge comprenant une cuve 10, dans laquelle est monté un tambour rotatif 12, d'axe sensiblement horizontal. Plus précisément, le tambour rotatif 12 est divisé intérieurement en deux compartiments 14a et 14b par une cloison radiale 16 passant par l'axe du tambour.As illustrated in particular by the figures 2A and 2B, the invention applies to a washing machine comprising a tank 10, in which is mounted a rotary drum 12, of substantially horizontal axis. More precisely, the rotary drum 12 is divided internally in two compartments 14a and 14b by a radial partition 16 passing through the axis of the drum.

De manière classique dans ce type de machine, la cuve 10 est équipée de deux portes d'accès 18 et le tambour 12 est également équipé de deux portes (non représentées) débouchant dans chacun des compartiments 14a et 14b et susceptibles d'être amenées en face des portes 18, à l'arrêt du tambour, par exemple grâce à un système d'indexage (non représenté).Conventionally in this type of machine, the tank 10 is equipped with two access doors 18 and the drum 12 is also equipped with two doors (not shown) opening into each of the compartments 14a and 14b and likely to be brought in front of doors 18, when the drum stops, for example thanks to a indexing system (not shown).

Par ailleurs, le tambour 12 comprend deux parois d'extrémité, en forme de disques, ainsi qu'une paroi circonférentielle 20 munie de perforations (non représentées). Dans chacun des compartiments 14a et 14b, la paroi circonférentielle 20 du tambour 12 est équipée intérieurement de nervures 22, de section triangulaire, qui tendent à s'opposer au glissement du linge le long de la paroi 20.Furthermore, the drum 12 comprises two end walls, disc-shaped, as well as a circumferential wall 20 provided with perforations (not represented). In each of compartments 14a and 14b, the circumferential wall 20 of the drum 12 is internally equipped with ribs 22, of section triangular, which tend to oppose the sliding of the laundry along the wall 20.

Le lave-linge selon l'invention est également équipé de moyens de commande, conçus pour entraíner le tambour 12 en rotation à une vitesse angulaire telle que les deux charges de linge à laver 24a, 24b, placées dans chacun des compartiments 14a et 14b, soient soumises à une accélération radiale G sensiblement constante, dont la valeur moyenne est comprise entre environ 0,70 g et environ 0,95 g, où g représente l'accélération de la pesanteur. Dans une réalisation préférentielle, la valeur moyenne de l'accélération radiale G est comprise plus précisément entre environ 0,80 g et environ 0,90 g.The washing machine according to the invention is also equipped with control means, designed to drive the drum 12 rotating at an angular speed such that the two loads of laundry 24a, 24b, placed in each of compartments 14a and 14b, either subjected to a radial acceleration G substantially constant, whose average value is between about 0.70 g and about 0.95 g, where g represents the acceleration of gravity. In an achievement preferential, the average value of the acceleration radial G is more precisely between approximately 0.80 g and approximately 0.90 g.

Comme l'illustrent en particulier les figures 2A et 2B, cette caractéristique originale du lave-linge selon l'invention permet d'assurer une chute des charges de linge 24a, 24b contenues dans chacun des compartiments 14a et 14b, sur une hauteur proche du diamètre du tambour 12, à chaque fois que celui-ci effectue une rotation d'un demi-tour.As illustrated in particular by the figures 2A and 2B, this original characteristic of the washing machine according to the invention ensures a fall of laundry loads 24a, 24b contained in each of compartments 14a and 14b, over a height close to the diameter of the drum 12, each time it rotates half a turn.

En effet, la vitesse angulaire de rotation du tambour 12, sensiblement plus élevée que dans les machines existantes du même type, permet de soumettre chacune des charges de linge 24a et 24b à une force centrifuge C'a, C'b (figure 2A) inférieure à la force de gravité Pa, Pb, mais relativement proche de celle-ci.Indeed, the angular speed of rotation of the drum 12, significantly higher than in existing machines of the same type, allows to submit each load of laundry 24a and 24b to a force centrifugal C'a, C'b (Figure 2A) less than the force of gravity Pa, Pb, but relatively close to this one.

Ainsi, lorsque le tambour 12 tourne dans le sens de la flèche F2 sur les figures 2A et 2B, la charge de linge 24a située dans le compartiment supérieur 14a par rapport à la cloison 16 reste dans le coin de ce compartiment placé en amont par rapport au sens de rotation F2 jusqu'à ce que la cloison 16 prenne une position presque verticale (figure 2B) . De façon comparable, la charge de linge 24b qui se trouve dans le compartiment inférieur 14b par rapport à la cloison 16 reste dans le coin amont de ce compartiment, par rapport au sens de rotation F2 du tambour, jusqu'à ce que la cloison 16 arrive dans la position presque verticale illustrée sur la figure 2B.Thus, when the drum 12 rotates in the direction of arrow F2 in FIGS. 2A and 2B, the laundry load 24a located in the compartment upper 14a with respect to the partition 16 remains in the corner of this compartment placed upstream from the direction of rotation F2 until partition 16 takes an almost vertical position (Figure 2B). In a way comparable, the load of laundry 24b which is in the lower compartment 14b relative to the partition 16 remains in the upstream corner of this compartment, by relative to the direction of rotation F2 of the drum, until that bulkhead 16 comes into position almost vertical illustrated in Figure 2B.

Par conséquent, les charges de linge 24a et 24b se décollent de la paroi circonférentielle 20 du tambour lorsque les coins dans lesquels elles se trouvent sont orientés vers le haut. Comme le montre la figure 2B, les charges de linge 24a et 24b chutent alors par gravité (flèches FCa et FCb) dans les coins opposés de leurs compartiments respectifs, sur une hauteur pratiquement égale au diamètre du tambour. Une telle chute se reproduit à chaque fois que le tambour effectue un demi tour. Un lavage du linge beaucoup plus efficace que dans les lave-linge du même type de l'art antérieur est ainsi assuré.Therefore, laundry loads 24a and 24b peel off from the circumferential wall 20 of the drum when the corners in which they are are facing up. As the Figure 2B, laundry loads 24a and 24b fall then by gravity (arrows FCa and FCb) in the corners opposite of their respective compartments, on a height practically equal to the diameter of the drum. A such a fall occurs every time the drum make a U-turn. Much more washing effective than in washing machines of the same type of art anterior is thus assured.

On décrira à présent, en référence à la figure 3, un premier mode de réalisation des moyens de commande permettant d'entraíner le tambour 12 en rotation, dans le lave-linge selon l'invention.We will now describe, with reference to the figure 3, a first embodiment of the means of command to drive the drum 12 in rotation, in the washing machine according to the invention.

Comme l'illustre cette figure, le tambour 12 est entraíné en rotation par un moteur électrique 26, au travers de moyens de transmission susceptibles d'induire un certain glissement. Dans ce cas, les moyens de transmission comprennent une courroie d'entraínement lisse 28, qui chemine à la fois sur une poulie fixée à l'arbre de sortie du moteur 26 et sur une poulie fixée à l'axe du tambour 12.As illustrated in this figure, the drum 12 is rotated by an electric motor 26, through susceptible means of transmission to induce a certain slip. In this case, the transmission means include a belt smooth drive 28, which runs on both a pulley fixed to the output shaft of the motor 26 and on a pulley fixed to the axis of the drum 12.

Le moteur électrique 26 est alimenté en courant électrique au travers d'un variateur de fréquence 30 piloté par un microprocesseur 32. Cet agencement classique permet d'assurer la montée en vitesse du tambour 12, puis le maintien de cette vitesse à un niveau prédéterminé. Cependant, le caractère approximatif du palier de vitesse ainsi atteint, augmenté par l'existence éventuel d'un glissement dans la transmission, ne permet d'assurer une régulation de la vitesse du tambour à la valeur optimisée désirée.The electric motor 26 is supplied with current electric through a frequency converter 30 controlled by a microprocessor 32. This arrangement classic ensures the speed increase of drum 12 and then maintaining that speed at a predetermined level. However, the character approximate speed step thus reached, increased by the possible existence of a shift in transmission, does not ensure regulation of the drum speed at the desired optimized value.

Pour cette raison, les moyens de commande classiques qui viennent d'être décrits sont avantageusement complétés par des moyens d'asservissement en boucle fermée de la vitesse.For this reason, the control means classics that have just been described are advantageously supplemented by means closed-loop speed control.

Dans le mode de réalisation illustré sur la figure 3, qui concerne plus particulièrement le cas d'une transmission dans laquelle existe un certain glissement, des moyens sont prévus pour mesurer directement la vitesse de rotation du tambour 12 autour de son axe. Dans l'exemple représenté, ces moyens comprennent un disque denté 34 solidaire de l'axe du tambour 12, ainsi qu'un capteur impulsionnel 36 placé en face de la périphérie du disque 34. Afin d'assurer une précision satisfaisante vis-à-vis de l'objectif visé, le disque 34 comporte de préférence au moins trente dents régulièrement réparties sur sa périphérie.In the embodiment illustrated in the Figure 3, which relates more particularly to the case of a transmission in which there is a certain sliding, means are provided for measuring directly the rotation speed of the drum 12 around of its axis. In the example shown, these means include a toothed disc 34 integral with the axis of the drum 12, as well as a pulse sensor 36 placed opposite the periphery of the disc 34. To ensure satisfactory accuracy vis-à-vis the objective targeted, the disc 34 preferably comprises at least thirty teeth regularly distributed around its periphery.

Lorsque le lave-linge est en fonctionnement, le capteur impulsionnel 36 délivre un signal représentatif de la vitesse de rotation du tambour 12. Ce signal peut être transmis soit directement à des moyens d'asservissement intégrés au variateur de fréquence 30, comme on l'a illustré en trait plein sur la figure 3, soit à un logiciel d'asservissement équipant le microprocesseur 32, comme on l'a illustré en traits discontinus. Dans l'un et l'autre cas, le signal de vitesse est exploité de façon à maintenir constante la vitesse de rotation du tambour 12, à un niveau tel que l'accélération radiale G appliquée sur les charges de linge reste en permanence à la valeur affichée, par exemple de 0,85 g, avec une précision au moins égale à 0,1 g.When the washing machine is in operation, the pulse sensor 36 delivers a representative signal the speed of rotation of the drum 12. This signal can be transmitted either directly to means control integrated into the frequency converter 30, as illustrated in solid lines in FIG. 3, either to a servo software equipping the microprocessor 32, as illustrated in lines discontinuous. In either case, the signal speed is operated so as to keep constant the speed of rotation of the drum 12, at a level such that the radial acceleration G applied to the loads of laundry remains permanently at the value displayed, for example of 0.85 g, with an accuracy at least equal to 0.1 g.

Sur la figure 4 on a représenté un deuxième mode de réalisation des moyens de commande assurant l'entraínement en rotation du tambour 12. Ce deuxième mode de réalisation s'applique essentiellement au cas où la transmission entre le moteur électrique 26 et le tambour 12 est assurée par des moyens de transmission sans glissement. Ces moyens de transmission sans glissement peuvent notamment comprendre une courroie crantée 38a, en prise à la fois sur une poulie crantée fixée à l'arbre de sortie du moteur 26 et sur une poulie crantée fixée à l'axe du tambour 12.In Figure 4 there is shown a second embodiment of the control means ensuring the rotary drive of the drum 12. This second embodiment essentially applies to the case where the transmission between the electric motor 26 and the drum 12 is provided by transmission means without sliding. These means of transmission without slip may include a belt notched 38a, engaged at the same time on a notched pulley attached to the output shaft of the motor 26 and on a Toothed pulley fixed to the axis of the drum 12.

Comme dans le premier mode de réalisation illustré sur la figure 3, l'alimentation électrique du moteur 26 s'effectue au travers d'un variateur de fréquence 30 piloté par un microprocesseur 32. Toutefois, du fait que la vitesse de rotation du tambour 12 est directement proportionnelle à la vitesse de rotation du moteur 26 (puisque la transmission est dépourvue de glissement), l'asservissement en vitesse peut se faire dans ce cas en mesurant la vitesse de rotation du moteur électrique 26.As in the first embodiment illustrated in figure 3, the power supply of the motor 26 is carried out through a variator of frequency 30 controlled by a microprocessor 32. However, because the speed of rotation of the drum 12 is directly proportional to the speed of rotation of the motor 26 (since the transmission is no slippage), the speed control can be done in this case by measuring the speed of electric motor rotation 26.

Ainsi, le lave-linge comprend alors des moyens pour mesurer la vitesse de rotation du moteur 26, constitués ici par un tachymètre 36a. Lorsque le lave-linge est en fonctionnement, le tachymètre 36a délivre un signal de sortie représentatif de la vitesse de rotation du moteur 26. Selon le cas, ce signal peut être transmis soit directement à un système d'asservissement intégré au variateur de fréquence 30, comme on l'a représenté en trait plein sur la figure 4, soit à un logiciel d'asservissement équipant le microprocesseur 32, comme on l'a représenté en traits discontinus.Thus, the washing machine then comprises means to measure the speed of rotation of the motor 26, constituted here by a tachometer 36a. When the washing machine is operating, the tachometer 36a delivers an output signal representative of the speed of motor rotation 26. Depending on the case, this signal can be transmitted either directly to a system control system integrated into the frequency converter 30, as shown in solid lines in FIG. 4, either to a servo software equipping the microprocessor 32, as shown in lines discontinuous.

Du fait que la vitesse angulaire de rotation du tambour 12 est réglée, conformément à l'invention, de façon telle que le linge soit soumis en permanence à une accélération radiale G sensiblement contante, de valeur moyenne comprise entre environ 0,70 g et environ 0,95 g, un lavage efficace du linge est assuré, comme on l'a expliqué précédemment en référence aux figures 2A et 2B. Because the angular speed of rotation of the drum 12 is adjusted, in accordance with the invention, to in such a way that the laundry is permanently subjected to a substantially constant radial acceleration G, of average value between approximately 0.70 g and approximately 0.95 g, effective washing of the laundry is ensured, as it was explained previously with reference to the figures 2A and 2B.

L'adjonction préférentielle d'un asservissement en boucle fermée permet d'éviter des fluctuations trop importantes de la vitesse de rotation du tambour. On est ainsi assuré que cette vitesse reste suffisante pour assurer une chute importante des deux charges de linge à chaque fois que le tambour accomplit un demi-tour, tout en étant suffisamment faible pour éviter tout risque de satellisation du linge à l'intérieur du tambour.The preferential addition of a servo closed loop avoids too much fluctuation of the drum speed. We is thus ensured that this speed remains sufficient to ensure a significant drop in the two loads of laundry every time the drum performs a turn around, while being low enough to avoid any risk of orbiting the laundry inside the drum.

Claims (10)

Procédé de lavage de linge, dans lequel : on place le linge dans deux compartiments (14a,14b) délimités à l'intérieur d'un tambour rotatif (12), d'axe sensiblement horizontal, par une cloison radiale (16) passant par ledit axe ; et on entraíne le tambour (12) en rotation autour de son axe, caractérisé en ce qu'on entraíne le tambour (12) en rotation à une vitesse angulaire telle que le linge soit soumis à une accélération radiale G sensiblement constante, dont la valeur moyenne est comprise entre environ 0,70 g et environ 0,95 g, où g représente l'accélération de la pesanteur.Method of washing clothes, in which: the laundry is placed in two compartments (14a, 14b) delimited inside a rotary drum (12), of substantially horizontal axis, by a radial partition (16) passing through said axis; and the drum (12) is rotated about its axis, characterized in that the drum (12) is rotated at an angular speed such that the laundry is subjected to a substantially constant radial acceleration G, the average value of which is between approximately 0.70 g and approximately 0.95 g , where g represents the acceleration of gravity. Procédé selon la revendication 1, dans lequel on entraíne le tambour (12) en rotation à une vitesse angulaire sensiblement constante.Method according to claim 1, in which one drives the drum (12) in rotation at a substantially constant angular velocity. Procédé selon la revendication 2, dans lequel on mesure la vitesse de rotation du tambour (12) et on asservit un moteur d'entraínement (26) de celui-ci de façon à rendre la vitesse mesurée sensiblement constante.Method according to claim 2, in which the speed of rotation of the drum (12) is measured and a drive motor (26) is controlled this one so as to make the speed measured substantially constant. Procédé selon la revendication 2, dans lequel on utilise un tambour (12) entraíné par un moteur (26) au travers de moyens de transmission (28a) sans glissement, on mesure la vitesse de rotation du moteur (26) et on asservit celui-ci, de façon à rendre la vitesse mesurée sensiblement constante.Method according to claim 2, in which is used a drum (12) driven by a motor (26) through transmission means (28a) without sliding, the speed of rotation of the motor (26) and it is controlled, so as to make the speed measured substantially constant. Procédé selon l'une quelconque des revendications précédentes, dans lequel on entraíne le tambour (12) en rotation à une vitesse angulaire telle que le linge soit soumis à une accélération radiale G sensiblement constante, dont la valeur moyenne est comprise entre environ 0,80 g et environ 0,90 g.Method according to any one of previous claims, in which the drum (12) rotating at an angular speed such the laundry is subjected to radial acceleration G substantially constant, the average value of which is between about 0.80 g and about 0.90 g. Lave-linge comprenant : un tambour rotatif (12), d'axe sensiblement horizontal, délimitant intérieurement deux compartiments (14a, 14b) séparés par une cloison radiale (16) passant par ledit axe ; et des moyens de commande (26,28,30,32,34,36 ; 36a) pour entraíner le tambour (12) en rotation autour de son axe ; caractérisé en ce que lesdits moyens de commande entraínent le tambour (12) en rotation à une vitesse angulaire telle que le linge soit soumis à une accélération radiale G sensiblement constante, dont la valeur moyenne est comprise entre environ 0,70 g et environ 0,95 g, où g représente l'accélération de la pesanteur.Washing machine including: a rotary drum (12), of substantially horizontal axis, internally defining two compartments (14a, 14b) separated by a radial partition (16) passing through said axis; and control means (26,28,30,32,34,36; 36a) for driving the drum (12) in rotation about its axis; characterized in that said control means drive the drum (12) in rotation at an angular speed such that the laundry is subjected to a substantially constant radial acceleration G, the average value of which is between approximately 0.70 g and approximately 0, 95 g, where g represents the acceleration of gravity. Lave-linge selon la revendication 6, dans lequel les moyens de commande (26,28,30,32,34,36 ; 36a) entraínent le tambour (12) en rotation à une vitesse angulaire sensiblement constante.Washing machine according to claim 6, in which control means (26,28,30,32,34,36; 36a) cause the drum (12) to rotate at a speed substantially constant angularity. Lave-linge selon la revendication 7, dans lequel les moyens de commande comprennent : un moteur (26) apte à entraíner le tambour (12) en rotation ; des moyens (34,36) pour mesurer la vitesse de rotation du tambour (12) et émettre un signal représentatif de celle-ci ; et des moyens d'asservissement sensibles audit signal, pour rendre la vitesse de rotation du tambour (12) sensiblement constante. Washing machine according to claim 7, in which the control means comprise: a motor (26) adapted to drive the drum (12) in rotation; means (34,36) for measuring the speed of rotation of the drum (12) and transmitting a signal representative thereof; and servo means sensitive to said signal, to make the speed of rotation of the drum (12) substantially constant. Lave-linge selon la revendication 7, dans lequel les moyens de commande comprennent : un moteur (26) apte à entraíner le tambour (12) en rotation au travers de moyens de transmission (28a) sans glissement ; des moyens (36a) pour mesurer la vitesse de rotation du moteur (26) et émettre un signal représentatif de celle-ci ; et des moyens d'asservissement sensibles audit signal, pour rendre la vitesse de rotation du moteur (26) sensiblement constante. Washing machine according to claim 7, in which the control means comprise: a motor (26) adapted to drive the drum (12) in rotation through transmission means (28a) without sliding; means (36a) for measuring the speed of rotation of the motor (26) and transmitting a signal representative thereof; and servo means sensitive to said signal, to make the speed of rotation of the motor (26) substantially constant. Lave-linge selon l'une quelconque des revendications 6 à 9, dans lequel les moyens de commande entraínent le tambour (12) en rotation à une vitesse angulaire telle que le linge soit soumis à une accélération radiale G sensiblement constante, dont la valeur moyenne est comprise entre environ 0,80 g et environ 0,90 g.Washing machine according to any one of claims 6 to 9, wherein the means of control drive the drum (12) in rotation at a angular speed such that the laundry is subjected to a substantially constant radial acceleration G, the average value is between approximately 0.80 g and about 0.90 g.
EP99403050A 1998-12-11 1999-12-07 Laundry washing method and washing machine using this method Expired - Lifetime EP1008685B1 (en)

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FR9815689A FR2787125B1 (en) 1998-12-11 1998-12-11 LAUNDRY WASHING METHOD AND WASHING MACHINE USING THE SAME
FR9815689 1998-12-11

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JP6356485B2 (en) * 2014-05-21 2018-07-11 株式会社山本製作所 Commercial laundry dewatering and drying equipment and placement system
WO2023124623A1 (en) * 2021-12-31 2023-07-06 青岛海尔洗涤电器有限公司 Washing device for laundry treatment apparatus and laundry treatment apparatus

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FR1235206A (en) * 1959-07-16 1960-07-01 Washing machine
EP0373063A1 (en) * 1988-12-09 1990-06-13 Ciapem Method for washing laundry, and washing machine putting it into operation

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TR199903073A3 (en) 2000-07-21
FR2787125A1 (en) 2000-06-16
EP1008685B1 (en) 2003-08-20
TR199903073A2 (en) 2000-07-21
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SI1008685T1 (en) 2003-12-31
FR2787125B1 (en) 2001-03-02

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