EP1911869B1 - Final spin-drying process in a washing cycle of a washing machine - Google Patents

Final spin-drying process in a washing cycle of a washing machine Download PDF

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Publication number
EP1911869B1
EP1911869B1 EP07118345.3A EP07118345A EP1911869B1 EP 1911869 B1 EP1911869 B1 EP 1911869B1 EP 07118345 A EP07118345 A EP 07118345A EP 1911869 B1 EP1911869 B1 EP 1911869B1
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EP
European Patent Office
Prior art keywords
drum
laundry
phase
washing machine
speed
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EP07118345.3A
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German (de)
French (fr)
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EP1911869A1 (en
Inventor
Thierry Burgain
Safia Zaakour
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Groupe Brandt SAS
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Groupe Brandt SAS
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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
    • D06F35/007—Methods for washing, rinsing or spin-drying for spin-drying 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
    • D06F37/30—Driving arrangements 
    • D06F37/36—Driving arrangements  for rotating the receptacle at more than one speed

Definitions

  • the present invention relates on the one hand to a washing machine.
  • It also relates to a method of spinning a washing cycle of a washing machine to effectively spin the laundry in a final phase of a washing cycle, and secondly, a machine adapted to to implement the spinning method according to the invention.
  • This method makes it possible to improve the spin coefficient of a washing cycle without increasing the speed of rotation of a drum.
  • the invention relates to machines for washing clothes or spinning laundry, and more particularly machines for domestic use.
  • Washing machines are known on the one hand with a final spin phase at a maximum speed step that can be preceded by a spin phase at a limited speed step.
  • washing machines have the disadvantage of obtaining an inefficient spin result, especially for loads of laundry mainly comprising cotton.
  • Washing machine manufacturers are looking to increase the maximum speed of rotation of the drum to improve the spin coefficient. From a threshold speed of rotation of the drum, the increase in the speed of rotation of the drum has only a small effect on the results of spinning of the laundry.
  • the increase in the speed of rotation of the drum generates additional mechanical stresses on the washing machine, and in particular on the drum. Therefore, the cost of obtaining a washing machine increases to obtain elements constituting said machine more resistant to phenomena of wear, vibration and fatigue.
  • the speed of rotation of the drum can not be increased indefinitely without taking the risk of mechanical breakage, and which can lead to the destruction of the drum with the possible consequences that follow each other over the rest of said drum. machine.
  • the increase in the speed of rotation of the drum also has the effect of degrading the fibers of the laundry items introduced into the drum and increasing the creasing of the laundry items.
  • EP 0 481 442 A2 which describes a washing machine having a spinning profile of the laundry provided with a first spinning phase of the laundry at low speed and a second spinning phase of the laundry at high speed. A phase of slowing down the speed of rotation of the drum is provided between these two phases of spinning at low and high speed.
  • WO 2005/010267 discloses a final spinning process as in the preamble of claim 1.
  • the present invention aims to solve the aforementioned drawbacks and to propose a washing machine with a spinning process of a washing cycle of a washing machine to effectively spin the laundry in a phase end of a washing cycle quickly and reliably according to the load of laundry introduced into the drum, and safely to the elements constituting the washing machine and the user.
  • the present invention is directed to a method of final spinning of a washing cycle of a washing machine comprising a tank filled with liquid from a water inlet, a rotary drum of loading laundry, control means of a laundry program.
  • the maximum speed of rotation of the drum is between 1000 and 1600 revolutions per minute
  • at least one release means is used during the stirring phase to redistribute the laundry inside the drum. so as to take off the laundry pieces from the peripheral wall of the drum, where the at least one release means used during the brewing phase is a water addition phase in the wash tank or a phase of abrupt braking of the drum.
  • the spin coefficient of the washing machine is substantially improved.
  • the sequence of a first spinning phase with a second spinning phase at a maximum speed after a phase of slowing down the speed of rotation of the drum below a desatlisation speed of the laundry makes it possible to obtain better results. spinning performance without increasing the rotation speed of the drum.
  • This spinning process can be integrated into any washing machine without no structural change. This spinning process does not generate any additional cost on the cost of obtaining the washing machine.
  • the step of slowing down the speed of rotation of the drum below at least one desatellizing speed of the laundry is to take off at least part of the laundry items from the walls of the drum and allow a new distribution of the laundry to the laundry. inside said drum.
  • the spinning method according to the invention is preferably implemented at the end of a washing cycle of a washing machine to improve the spinning performance. This is a final spin cycle before stopping rotation of the drum to allow unloading of the laundry introduced into said drum. In this way, the laundry contains a minimum amount of water and thus allows the drying of the latter as quickly as possible.
  • the spinning method according to the invention can also be followed by a drying cycle during the implementation of the invention in a washer-dryer.
  • the phase of slowing down the rotational speed of the drum is implemented until a rotation speed of the drum is less than or equal to a speed of desatellization of the laundry.
  • the laundry contained in the drum comes off at least in part from the walls of said drum by a slow rotational movement to allow a new distribution of the laundry inside said drum before the second spin phase of the method according to the invention.
  • the pieces of laundry are distributed differently inside the drum and in this way the expulsion of water contained in this load of laundry is favored during the second phase of spinning of the process.
  • the overall spin performance is thus improved.
  • the slowing down phase of the rotation speed of the drum is followed by a stopping phase of the drum, and said stopping phase of the drum preceding the second spinning phase.
  • the laundry pieces are detached at least in part from the walls of the drum by the force of gravity to allow a new distribution of the laundry inside said drum before the second spin phase of the process according to the invention.
  • the pieces of laundry are distributed differently inside the drum and in this way the expulsion of water contained by this load of laundry is promoted during the second spinning phase of the process.
  • the overall spin performance is thus improved.
  • the stopping phase of the drum is followed by a stirring phase to redistribute the laundry inside the drum, and said stirring phase of the laundry preceding the second spinning phase.
  • a tumbling phase of the laundry is carried out between the two spinning phases of the process according to the invention so as to redistribute the load of laundry inside the drum.
  • the pieces of laundry placed in the center of the drum during the first spinning phase having been subjected only to limited centrifugal force, given their position in the drum, move at least partly towards the periphery of the drum. drum.
  • a position of the pieces of laundry closer to the periphery of the drum will allow them to exert a centrifugal force higher compared to the distance to the center of the drum.
  • At least one release means is implemented during the brewing phase to redistribute the laundry inside the drum.
  • At least one release means is implemented during the brewing phase to take off the laundry items from the peripheral wall of the drum.
  • This release means makes it possible to promote the release of the laundry having a tendency to adhere to the drum or the pieces of laundry between them following the first spinning phase carried out at a maximum speed of rotation of the drum.
  • the laundry pieces can thus be mixed again to create a new distribution of the laundry load inside the drum before the second spinning phase and therefore improve the efficiency of the spinning.
  • This washing machine can be a washing machine for domestic use or a washer-dryer or a spinning machine.
  • an overhead loading machine has been illustrated.
  • the present invention applies to all types of washing machines, and including front-loading.
  • such a washing machine 1 comprises a washing tub 2 and a drum 3 rotatably mounted, here along a horizontal axis of rotation 5, inside said washing tub 2.
  • a door located on the upper face of the machine 1 allows the user to access the inside of the tank 2 and the drum 3 to introduce or remove the laundry.
  • a control panel 4 is also provided in the upper part of the machine 1.
  • the washing machine 1 comprises a water level regulating device (not shown).
  • This water regulating device can be, in a known manner, constituted by an air pressure switch whose bell-shaped compression chamber is disposed in the tank 2 of the appliance 1.
  • the diaphragm of the pressure switch which moves under the effect of pressure variations relative to the atmosphere acts with an electrical contact that gives the level signal reached, the automation.
  • This level reached is also not necessarily chosen to correspond to a volume of water available at the bottom of tank 2 sufficient to operate the apparatus 1 in a normal manner (or nominal).
  • a variant of the invention is to match the level reached with the volume of water at the bottom of tank 2 just necessary, and sufficient, to a good operation of the device 1.
  • the device for regulating the water level This makes it possible to obtain a determined level necessary to protect the laundry from mechanical action and to optimize water consumption.
  • the washing machine 1 also comprises a drain pump for discharging the liquid at the bottom of the tank 2.
  • the lower part of the tank 2 comprises a recycling pump provided with a water guide pipe discharged by the bearing drum 4 and a drain pump connected to a discharge pipe. Filters and micro-filters make it possible to recycle the clean water to supply the drum 3 in a closed circuit so as to save the volume of water introduced from the outside.
  • washing and rinsing cycles are sequenced in baths by emptying operations during which only the drain pump is actuated.
  • the washing machine comprises all the equipment and means necessary for the implementation of a conventional washing process in such a rotary drum machine.
  • the present invention is directed to a method of final spinning of a washing cycle of a washing machine 1 comprising a tank 2 filled with liquid from a water intake, a rotating drum 3 loading laundry, control means of a laundry program.
  • the spin coefficient of the washing machine 1 is substantially improved.
  • the sequence of a first spinning phase with a second spinning phase at a maximum speed after a phase of slowing down the speed of rotation of the drum 3 below a speed of desatellization of the laundry makes it possible to obtain better spin performance without increasing the rotational speed of the drum 3.
  • the spinning method according to the invention makes it possible to improve the spin coefficient of the order of 5% compared to a conventional final spin cycle.
  • the desatellization of the laundry in the drum 3 occurs as soon as the centrifugal force exerted by the speed of rotation of the drum 3 is substantially less than the force of gravity exerted by the laundry items contained in said drum 3.
  • the speed of desatellization of the laundry is between 50 and 75 revolutions per minute, and preferably of the order of 50 revolutions per minute.
  • This spinning process can be integrated into any washing machine 1 without any structural modification. This spinning process does not generate any additional cost on the cost of obtaining the washing machine 1.
  • sequencing of the spinning process phases is without additional constraints on the elements constituting the washing machine 1. Only mechanical fatigue can be influenced according to the duration of the various speed stages of the spin phases.
  • the step of slowing down the speed of rotation of the drum 3 below at least one desatellizing speed of the laundry acts to take off at least part of the laundry pieces from the walls of the drum 3 and to allow a new distribution of the laundry to inside said drum 3.
  • the spinning process according to the invention is preferably carried out at the end of a washing cycle of a washing machine 1 to improve the spinning performance. This is a final spin cycle before stopping rotation of the drum 3 to allow unloading of the laundry introduced into said drum 3. From In this way, the laundry contains a minimum amount of water and allows the drying of the latter as quickly as possible.
  • the spinning method according to the invention can also be followed by a drying cycle during the implementation of the invention in a washer-dryer.
  • the first and second spinning phases may be identical.
  • the rotational speed bearings of the drum 3 may be identical during said first and second spin phases.
  • the durations of the rotational speed bearings of the drum 3 may be identical during said first and second spinning phases.
  • the first and second spin phases may be different.
  • the rotational speed bearings of the drum 3 may be different during said first and second spinning phases.
  • the durations of the rotational speed bearings of the drum 3 may be different during said first and second spinning phases.
  • the rotational speed bearings of the drum 3 are identical during said first and second spinning phases with shorter rotation speed bearings 3 of the drum 3 during the second spinning phase.
  • a spinning method according to the invention is defined by the maximum speed of rotation of the drum 3, the rotational speed bearings of the drum 3 during the two spinning phases, and the durations of said rotational speed bearings. Said spinning method makes it possible to improve the efficiency of the spinning and to optimize the mechanical stresses on the elements constituting the washing machine 1.
  • the spinning method according to the invention can be limited to a number of washing cycles of a washing machine 1 requiring a high efficiency during the spin cycle.
  • the calculation of the spin coefficient is obtained by measuring the mass difference of the wet load of laundry after a spin cycle with respect to the mass of the same load of dry laundry before the start of a wash cycle, then this mass difference corresponding to the mass of water contained in the laundry after a spin cycle is divided by the mass of the dry laundry load before the start of a wash cycle.
  • the spin performance is obtained essentially by acting on three influential parameters.
  • the first influential parameter is the maximum speed of rotation of the drum 3.
  • the second influential parameter is the rise time in rotation speed of the drum 3 between the different speed stages, which can also be expressed by the acceleration.
  • the third influential parameter is the duration of the speed rotation of the drum 3 and in particular the duration of the final bearing at the maximum rotational speed.
  • the maximum rotational speed can not be increased indefinitely because of the mechanical stresses involved in a washing machine 1.
  • the rise times in rotational speed of the drum 3 are limited by the characteristics of the driving motor of the drum 3.
  • the rotational speed bearings times of the drum 3 are also limited firstly because of the characteristics of the engine and secondly because of the phenomenon of fatigue of the elements constituting the washing machines.
  • the spin performance at each level of Drum rotation speed 3 reach an asymptote from a relatively short duration.
  • the centrifugal force exerted on the load of laundry during the rotation of the drum 3 during a spinning phase makes it possible to expel a quantity of water at each speed step without being able to exceed a threshold.
  • the Applicant has been able to note these effects during his experiments on the spin cycles and has resulted in the spinning method according to the invention to improve the efficiency of the spin and reduce the risks compared to the trend of the spin. appliance market looking for a higher and higher drum rotation speed during the final spin.
  • the durations of the first and second spin phase may be identical or the first spin phase longer than the second spin phase.
  • sequencing of the two spinning phases of the process according to the invention may have a duration substantially equal to the duration of a spin phase of a conventional cycle. In this way, the electricity consumption can be of the same order while increasing the performance of a washing cycle of the washing machine.
  • the maximum speed of rotation of the drum 3 is between 1000 and 1600 revolutions per minute as conventionally used on washing machines.
  • the maximum speed of rotation of the drum 3 is not limited and can take any value determined by the washing machine manufacturer 1 according to the design of said machine 1.
  • the difference between the maximum rotational speed increments during the first and second spin phases is in a range of 0 to 100 revolutions per minute.
  • This difference may be due to the mass difference between the first spin phase and the second spin phase. Part of the water contained by the laundry load during the first spin phase is expelled and the drive motor of the drum 3 can slightly increase the speed of rotation of the drum 3 during the second phase of drying. 'spinning.
  • the phase of slowing down the speed of rotation of the drum 3 is implemented until a speed of rotation of the drum 3 less than or equal to a speed of desatellization of the laundry.
  • the laundry contained in the drum 3 comes off at least in part from the walls of said drum 3 by a slow rotational movement to allow a new distribution of the laundry inside said drum 3 before the second spin phase of the process according to to the invention.
  • the pieces of laundry are distributed differently inside the drum 3 and in this way the expulsion of water contained by this load of laundry is favored during the second spinning phase of the process.
  • the overall spin performance is thus improved.
  • the brewing speed of the laundry is between 30 and 60 revolutions per minute, and preferably of the order of 50 revolutions per minute.
  • the phase of slowing down the speed of rotation of the drum 3 is followed by a stop phase of the drum 3, and said stopping phase of the drum 3 preceding the second spinning phase.
  • the pieces of laundry are detached at least in part from the walls of the drum 3 by the force of gravity to allow a new distribution of the laundry inside said drum 3 before the second phase of spinning of the process according to the invention .
  • the pieces of laundry are distributed differently inside the drum 3 and in this way the expulsion of water contained by this load of laundry is favored during the second spinning phase of the process.
  • the overall spin performance is thus improved.
  • the stopping phase of the drum 3 is followed by a brewing phase to redistribute the laundry inside the drum 3, and said brewing phase of the laundry preceding the second spinning phase.
  • a phase of unfolding the laundry is implemented between the two spinning phases of the process according to the invention so as to redistribute the load of laundry inside the drum 3.
  • the pieces of laundry placed in the center of the drum 3 during of the first spin phase having been subjected only to a limited centrifugal force in view of their position in the drum 3 move at least partly in the direction of the periphery of the drum 3.
  • a position of the clothes more near the periphery of the drum 3 will allow a higher centrifugal force with respect to the distance to the center of the drum 3.
  • the first and second spinning phases are preceded by a phase of unbalance detection and distribution of the laundry in the drum 3.
  • the two spinning phases are carried out safely for the washing machine 1.
  • the latter undergoes no mechanical stress that can cause damage during the rise in speed of rotation of the drum 3.
  • the load of laundry is distributed homogeneously inside the drum 3 and plate uniformly against the peripheral wall of the drum 3.
  • At least one release means is used during the stirring phase to redistribute the laundry inside the drum 3.
  • At least one release means is implemented during the brewing phase to take off the laundry items from the peripheral wall of the drum.
  • This release means makes it possible to promote the detachment of the laundry having a tendency to adhere to the drum following the first spinning phase carried out at a maximum speed of rotation of the drum.
  • the laundry pieces can thus be mixed again to create a new distribution of the laundry load inside the drum before the second spinning phase and therefore improve the efficiency of the spinning.
  • said at least one release means used during the brewing phase is a water addition phase in the washing tank 2.
  • the phase of adding water into the washing tub 2 makes it possible to unstick the pieces of linen from the peripheral wall of the drum 3.
  • the small amount of water introduced into the tank 2 is expelled outside the laundry rooms during the second spinning phase of the process according to the invention.
  • said at least one release means used during the stirring phase is a sudden braking phase of the drum 3.
  • the sudden braking phase of the drum 3 makes it possible to exert a force contrary to the adhesive force exerted between the peripheral wall of the drum 3 and the pieces of laundry.
  • This adhesion force is particularly related to the first spinning phase of the process according to the invention where the load of laundry is pressed against the peripheral wall of the drum 3.
  • the detection of the release of the laundry during the stirring phase can be achieved by a measurement of variation of the rotational speed of the drum 3.
  • the detection of the uncoupling corresponds to the detection of the detachment of the laundry from the peripheral wall of the drum 3.
  • Said measure of variation of the speed of rotation of the drum 3 can be performed on a rotational speed bearing lower than the speed of orisation of the laundry in the drum 3.
  • the rotational speed bearing to realize the measurement of speed variation of rotation of the drum 3 may be of the order of 40 revolutions per minute.
  • the detection of the loosening is obtained when the load of laundry is not plated on the peripheral wall of the drum 3 and that it is brewed inside said drum 3.
  • the brewing of the laundry inside the drum 3 generates strong variations in the speed of rotation of the drum 3 with respect to the target speed.

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  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Description

La présente invention concerne d'une part une machine à laver le linge.The present invention relates on the one hand to a washing machine.

Elle concerne également un procédé d'essorage d'un cycle de lavage d'une machine à laver le linge permettant d'essorer efficacement le linge dans une phase finale d'un cycle de lavage, et d'autre part, une machine adaptée à mettre en oeuvre le procédé d'essorage conforme à l'invention. Ce procédé permet d'améliorer le coefficient d'essorage d'un cycle de lavage sans augmenter la vitesse de rotation d'un tambour.It also relates to a method of spinning a washing cycle of a washing machine to effectively spin the laundry in a final phase of a washing cycle, and secondly, a machine adapted to to implement the spinning method according to the invention. This method makes it possible to improve the spin coefficient of a washing cycle without increasing the speed of rotation of a drum.

De manière générale, l'invention concerne les machines à laver le linge ou à essorer le linge, et plus particulièrement les machines à usage domestique.In general, the invention relates to machines for washing clothes or spinning laundry, and more particularly machines for domestic use.

On connaît d'une part des machines à laver le linge avec une phase d'essorage final à un palier de vitesse maximum pouvant être précédé d'une phase d'essorage à un palier de vitesse limité.Washing machines are known on the one hand with a final spin phase at a maximum speed step that can be preceded by a spin phase at a limited speed step.

Cependant, ces machines à laver le linge présentent l'inconvénient d'obtenir un résultat d'essorage peu efficace, notamment pour des charges de linge comprenant majoritairement du coton.However, these washing machines have the disadvantage of obtaining an inefficient spin result, especially for loads of laundry mainly comprising cotton.

Les fabricants de machine à laver le linge recherchent à augmenter la vitesse maximale de rotation du tambour pour améliorer le coefficient d'essorage. A partir d'un seuil de vitesse de rotation du tambour, l'augmentation de la vitesse de rotation du tambour n'apporte qu'un faible effet sur les résultats d'essorage du linge.Washing machine manufacturers are looking to increase the maximum speed of rotation of the drum to improve the spin coefficient. From a threshold speed of rotation of the drum, the increase in the speed of rotation of the drum has only a small effect on the results of spinning of the laundry.

En outre, l'augmentation de la vitesse de rotation du tambour engendre des contraintes mécaniques supplémentaires sur la machine à laver le linge, et en particulier sur le tambour. Par conséquent, le coût d'obtention d'une machine à laver le linge augmente de manière à obtenir des éléments constituant ladite machine plus résistants aux phénomènes d'usure, de vibrations et de fatigue.In addition, the increase in the speed of rotation of the drum generates additional mechanical stresses on the washing machine, and in particular on the drum. Therefore, the cost of obtaining a washing machine increases to obtain elements constituting said machine more resistant to phenomena of wear, vibration and fatigue.

Par ailleurs, pour une machine à laver le linge donnée la vitesse de rotation du tambour ne peut être augmentée indéfiniment sans prendre des risques de rupture mécanique, et pouvant conduire à la destruction du tambour avec les conséquences possibles s'enchaînant sur le reste de ladite machine.Moreover, for a given washing machine the speed of rotation of the drum can not be increased indefinitely without taking the risk of mechanical breakage, and which can lead to the destruction of the drum with the possible consequences that follow each other over the rest of said drum. machine.

L'augmentation de la vitesse de rotation du tambour a aussi pour conséquence de dégrader les fibres des pièces de linge introduites dans le tambour et d'augmenter le froissage des pièces de linge.The increase in the speed of rotation of the drum also has the effect of degrading the fibers of the laundry items introduced into the drum and increasing the creasing of the laundry items.

On connaît également un document EP 0 481 442 A2 qui décrit un lave-linge ayant un profil d'essorage du linge pourvu d'une première phase d'essorage du linge à basse vitesse et une seconde phase d'essorage du linge à haute vitesse. Une phase de ralentissement de la vitesse de rotation du tambour est ménagée entre ces deux phases d'essorage à basse et haute vitesse.A document is also known EP 0 481 442 A2 which describes a washing machine having a spinning profile of the laundry provided with a first spinning phase of the laundry at low speed and a second spinning phase of the laundry at high speed. A phase of slowing down the speed of rotation of the drum is provided between these two phases of spinning at low and high speed.

Cependant, un tel profil d'essorage du linge permet de limiter le froissage et l'endommagement du linge lors d'un cycle d'essorage du linge mais en aucun cas d'améliorer le coefficient d'essorage du linge en tenant compte des contraintes mécaniques du lave-linge. WO 2005/010267 divulgue un procédé d'essorage finale comme dans la préambule de la revendication 1.However, such a spinning profile of the laundry makes it possible to limit the creasing and the damage of the laundry during a spin cycle of the laundry but in no case to improve the drying coefficient of the laundry taking into account the mechanical constraints of the washing machine. WO 2005/010267 discloses a final spinning process as in the preamble of claim 1.

La présente invention a pour but de résoudre les inconvénients précités et de proposer une machine à laver le linge avec un procédé d'essorage d'un cycle de lavage d'une machine à laver le linge permettant d'essorer efficacement le linge dans une phase finale d'un cycle de lavage de manière rapide et fiable en fonction de la charge de linge introduite dans le tambour, et en toute sécurité pour les éléments constituant la machine à laver le linge et l'utilisateur.The present invention aims to solve the aforementioned drawbacks and to propose a washing machine with a spinning process of a washing cycle of a washing machine to effectively spin the laundry in a phase end of a washing cycle quickly and reliably according to the load of laundry introduced into the drum, and safely to the elements constituting the washing machine and the user.

A cet effet, la présente invention vise un procédé d'essorage final d'un cycle de lavage d'une machine à laver le linge comprenant une cuve remplie en liquide à partir d'une prise d'arrivée en eau, un tambour rotatif de chargement du linge, des moyens de commande d'un programme de lavage du linge.For this purpose, the present invention is directed to a method of final spinning of a washing cycle of a washing machine comprising a tank filled with liquid from a water inlet, a rotary drum of loading laundry, control means of a laundry program.

Le procédé d'essorage final d'un cycle de lavage d'une machine à laver le linge comprend au moins les étapes suivantes exécutées dans l'ordre mentionné :

  • une première phase d'essorage à un palier de vitesse maximum de rotation du tambour ;
  • une phase de ralentissement de la vitesse de rotation du tambour et ladite vitesse de rotation du tambour étant inférieure à au moins une vitesse de désatellisation du linge ; et
  • une phase d'arrêt du tambour ;
  • une phase de brassage pour redistribuer le linge à l'intérieur du tambour ; et
  • une seconde phase d'essorage à un palier de vitesse maximum de rotation du tambour.
The final spinning process of a washing cycle of a washing machine comprises at least the following steps performed in the order mentioned:
  • a first spinning phase at a maximum speed rotation drum rotation;
  • a slowing down phase of the rotational speed of the drum and said rotational speed of the drum being less than at least one desatellizing speed of the laundry; and
  • a stop phase of the drum;
  • a brewing phase to redistribute the laundry inside the drum; and
  • a second spinning phase at a maximum speed of rotation of the drum.

Selon l'invention, la vitesse maximum de rotation du tambour est comprise entre 1000 et 1600 tours par minute, au moins un moyen de défoulage est mis en oeuvre au cours de la phase de brassage pour redistribuer le linge à l'intérieur du tambour de sorte à décoller les pièces de linge de la paroi périphérique du tambour, où ledit au moins un moyen de défoulage mis en oeuvre au cours de la phase de brassage est une phase d'ajout d'eau dans la cuve de lavage ou une phase de freinage brusque du tambour.According to the invention, the maximum speed of rotation of the drum is between 1000 and 1600 revolutions per minute, at least one release means is used during the stirring phase to redistribute the laundry inside the drum. so as to take off the laundry pieces from the peripheral wall of the drum, where the at least one release means used during the brewing phase is a water addition phase in the wash tank or a phase of abrupt braking of the drum.

Ainsi, le coefficient d'essorage de la machine à laver le linge est amélioré sensiblement. L'enchaînement d'une première phase d'essorage avec une seconde phase d'essorage à une vitesse maximale après une phase de ralentissement de la vitesse de rotation du tambour en dessous d'une vitesse de désatellisation du linge permet d'obtenir de meilleures performances d'essorage sans augmenter la vitesse de rotation du tambour.Thus, the spin coefficient of the washing machine is substantially improved. The sequence of a first spinning phase with a second spinning phase at a maximum speed after a phase of slowing down the speed of rotation of the drum below a desatlisation speed of the laundry makes it possible to obtain better results. spinning performance without increasing the rotation speed of the drum.

Ce procédé d'essorage peut être intégré dans toute machine à laver le linge sans aucune modification structurelle. Ce procédé d'essorage n'engendre aucun surcoût sur le coût d'obtention de la machine à laver le linge.This spinning process can be integrated into any washing machine without no structural change. This spinning process does not generate any additional cost on the cost of obtaining the washing machine.

L'amélioration des performances d'essorage permet de répondre plus aisément aux normes environnementales en vigueur.Improved spinning performance makes it easier to meet current environmental standards.

En outre, l'enchaînement des phases d'essorage du procédé est sans contrainte supplémentaire sur les éléments constituant la machine à laver linge.In addition, the sequencing of the spinning process is without additional stress on the elements constituting the washing machine.

La phase de ralentissement de la vitesse de rotation du tambour en dessous d'au moins une vitesse de désatellisation du linge a pour rôle de décoller au moins en partie les pièces de linge des parois du tambour et permettre une nouvelle distribution du linge à l'intérieur dudit tambour.The step of slowing down the speed of rotation of the drum below at least one desatellizing speed of the laundry is to take off at least part of the laundry items from the walls of the drum and allow a new distribution of the laundry to the laundry. inside said drum.

Le procédé d'essorage conforme à l'invention est préférentiellement mis en oeuvre à la fin d'un cycle de lavage d'une machine à laver le linge pour améliorer les performances d'essorage. Il s'agit d'un cycle d'essorage final avant l'arrêt en rotation du tambour pour permettre le déchargement du linge introduit dans ledit tambour. De cette manière, le linge contient une quantité minimum d'eau et permet ainsi de réaliser le séchage de celui-ci le plus rapidement possible.The spinning method according to the invention is preferably implemented at the end of a washing cycle of a washing machine to improve the spinning performance. This is a final spin cycle before stopping rotation of the drum to allow unloading of the laundry introduced into said drum. In this way, the laundry contains a minimum amount of water and thus allows the drying of the latter as quickly as possible.

Le procédé d'essorage conforme à l'invention peut également être suivi d'un cycle de séchage lors de la mise en oeuvre de l'invention dans une lavante-séchante.The spinning method according to the invention can also be followed by a drying cycle during the implementation of the invention in a washer-dryer.

Selon une caractéristique préférée de l'invention, la phase de ralentissement de la vitesse de rotation du tambour est mise en oeuvre jusqu'à une vitesse de rotation du tambour inférieure ou égale à une vitesse de désatellisation du linge.According to a preferred characteristic of the invention, the phase of slowing down the rotational speed of the drum is implemented until a rotation speed of the drum is less than or equal to a speed of desatellization of the laundry.

Ainsi, le linge contenu dans le tambour se décolle au moins en partie des parois dudit tambour par un mouvement de rotation lent pour permettre une nouvelle distribution du linge à l'intérieur dudit tambour avant la seconde phase d'essorage du procédé conforme à l'invention.Thus, the laundry contained in the drum comes off at least in part from the walls of said drum by a slow rotational movement to allow a new distribution of the laundry inside said drum before the second spin phase of the method according to the invention.

Les pièces de linge sont réparties différemment à l'intérieur du tambour et de cette manière l'expulsion d'eau contenue dans cette charge de linge est favorisée lors de la seconde phase d'essorage du procédé. Les performances d'essorage globales sont ainsi améliorées.The pieces of laundry are distributed differently inside the drum and in this way the expulsion of water contained in this load of laundry is favored during the second phase of spinning of the process. The overall spin performance is thus improved.

La phase de ralentissement de la vitesse de rotation du tambour est suivie d'une phase d'arrêt du tambour, et ladite phase d'arrêt du tambour précédant la seconde phase d'essorage.The slowing down phase of the rotation speed of the drum is followed by a stopping phase of the drum, and said stopping phase of the drum preceding the second spinning phase.

Ainsi, les pièces de linge se décollent au moins en partie des parois du tambour par la force de pesanteur pour permettre une nouvelle distribution du linge à l'intérieur dudit tambour avant la seconde phase d'essorage du procédé conforme à l'invention.Thus, the laundry pieces are detached at least in part from the walls of the drum by the force of gravity to allow a new distribution of the laundry inside said drum before the second spin phase of the process according to the invention.

Les pièces de linge sont réparties différemment à l'intérieur du tambour et de cette manière l'expulsion d'eau contenue par cette charge de linge est favorisée lors de la seconde phase d'essorage du procédé. Les performances d'essorage globales sont ainsi améliorées.The pieces of laundry are distributed differently inside the drum and in this way the expulsion of water contained by this load of laundry is promoted during the second spinning phase of the process. The overall spin performance is thus improved.

La phase d'arrêt du tambour est suivie d'une phase de brassage pour redistribuer le linge à l'intérieur du tambour, et ladite phase de brassage du linge précédant la seconde phase d'essorage.The stopping phase of the drum is followed by a stirring phase to redistribute the laundry inside the drum, and said stirring phase of the laundry preceding the second spinning phase.

Ainsi, une phase de défoulage du linge est mise en oeuvre entre les deux phases d'essorage du procédé conforme à l'invention de manière à redistribuer la charge de linge à l'intérieur du tambour. Les pièces de linge placées au centre du tambour au cours de la première phase d'essorage n'ayant été soumises qu'à une force centrifuge limitée compte tenu de leur position dans le tambour se déplacent au moins en partie en direction de la périphérie du tambour. Une position des pièces de linge plus proche de la périphérie du tambour permettra de leur exercer une force centrifuge plus élevée au regard de la distance au centre du tambour.Thus, a tumbling phase of the laundry is carried out between the two spinning phases of the process according to the invention so as to redistribute the load of laundry inside the drum. The pieces of laundry placed in the center of the drum during the first spinning phase having been subjected only to limited centrifugal force, given their position in the drum, move at least partly towards the periphery of the drum. drum. A position of the pieces of laundry closer to the periphery of the drum will allow them to exert a centrifugal force higher compared to the distance to the center of the drum.

Au moins un moyen de défoulage est mis en oeuvre au cours de la phase de brassage pour redistribuer le linge à l'intérieur du tambour.At least one release means is implemented during the brewing phase to redistribute the laundry inside the drum.

Ainsi, au moins un moyen de défoulage est mis en oeuvre au cours de la phase de brassage pour décoller les pièces de linge de la paroi périphérique du tambour. Ce moyen de défoulage permet de favoriser le défoulage du linge ayant une tendance à adhérer au tambour ou les pièces de linge entre elles suite à la première phase d'essorage réalisée à un palier de vitesse maximum de rotation du tambour. Les pièces de linge peuvent ainsi se mélanger de nouveau pour créer une nouvelle distribution de la charge de linge à l'intérieur du tambour avant la seconde phase d'essorage et par conséquent améliorer l'efficacité de l'essorage.Thus, at least one release means is implemented during the brewing phase to take off the laundry items from the peripheral wall of the drum. This release means makes it possible to promote the release of the laundry having a tendency to adhere to the drum or the pieces of laundry between them following the first spinning phase carried out at a maximum speed of rotation of the drum. The laundry pieces can thus be mixed again to create a new distribution of the laundry load inside the drum before the second spinning phase and therefore improve the efficiency of the spinning.

D'autres particularités et avantages de l'invention apparaîtront encore dans la description ci-après.Other features and advantages of the invention will become apparent in the description below.

Aux dessins annexés, donnés à titre d'exemples non limitatifs :

  • o la figure 1 illustre une machine à laver le linge conforme à l'invention ; et
  • o la figure 2 est une courbe illustrant le profil de la vitesse de rotation d'un tambour en fonction du temps au cours du procédé d'essorage conforme à l'invention.
In the accompanying drawings, given as non-limiting examples:
  • o the figure 1 illustrates a washing machine the laundry according to the invention; and
  • o the figure 2 is a curve illustrating the profile of the speed of rotation of a drum as a function of time during the spinning process according to the invention.

On va décrire tout d'abord en référence à la figure 1 une machine à laver le linge 1 adaptée à mettre en oeuvre la présente invention.We will first describe with reference to the figure 1 a washing machine 1 adapted to implement the present invention.

Cette machine à laver le linge peut être une machine à laver le linge à usage domestique ou une lavante-séchante ou encore une machine à essorer le linge.This washing machine can be a washing machine for domestic use or a washer-dryer or a spinning machine.

On a illustré sur ce mode de réalisation une machine à chargement par le dessus. Bien entendu, la présente invention s'applique à tous les types de machine à laver, et notamment à chargement frontal.In this embodiment, an overhead loading machine has been illustrated. Of course, the present invention applies to all types of washing machines, and including front-loading.

De manière classique, une telle machine à laver le linge 1 comprend une cuve de lavage 2 et un tambour 3 monté en rotation, ici suivant un axe de rotation horizontal 5, à l'intérieur de ladite cuve de lavage 2.In a conventional manner, such a washing machine 1 comprises a washing tub 2 and a drum 3 rotatably mounted, here along a horizontal axis of rotation 5, inside said washing tub 2.

Une porte située sur la face supérieure de la machine 1 permet à l'utilisateur d'avoir accès à l'intérieur de la cuve 2 et du tambour 3 pour introduire ou retirer le linge.A door located on the upper face of the machine 1 allows the user to access the inside of the tank 2 and the drum 3 to introduce or remove the laundry.

Un tableau de commande 4 est également prévu en partie supérieure de la machine 1.A control panel 4 is also provided in the upper part of the machine 1.

La machine à laver le linge 1 comprend un dispositif de régulation de niveau d'eau (non représenté). Ce dispositif de régulation d'eau peut être, de manière connue, constitué d'un pressostat à air dont la chambre de compression, en cloche, est disposée dans la cuve 2 de l'appareil électroménager 1. La membrane du pressostat qui se déplace sous l'effet des variations de pression relative à l'atmosphère agit avec un contact électrique qui donne le signal de niveau atteint, à l'automatisme. Ce niveau atteint n'est d'ailleurs pas choisi nécessairement pour correspondre à un volume d'eau disponible en fond de cuve 2 suffisant pour faire fonctionner l'appareil 1 de façon normale (ou nominale). Une variante de l'invention, est de faire coïncider le niveau atteint avec le volume d'eau en fond de cuve 2 juste nécessaire, et suffisant, à un bon fonctionnement de l'appareil 1. Le dispositif de régulation du niveau d'eau permet ainsi d'obtenir un niveau bien déterminé nécessaire pour protéger le linge de l'action mécanique et d'optimiser la consommation d'eau.The washing machine 1 comprises a water level regulating device (not shown). This water regulating device can be, in a known manner, constituted by an air pressure switch whose bell-shaped compression chamber is disposed in the tank 2 of the appliance 1. The diaphragm of the pressure switch which moves under the effect of pressure variations relative to the atmosphere acts with an electrical contact that gives the level signal reached, the automation. This level reached is also not necessarily chosen to correspond to a volume of water available at the bottom of tank 2 sufficient to operate the apparatus 1 in a normal manner (or nominal). A variant of the invention is to match the level reached with the volume of water at the bottom of tank 2 just necessary, and sufficient, to a good operation of the device 1. The device for regulating the water level This makes it possible to obtain a determined level necessary to protect the laundry from mechanical action and to optimize water consumption.

Le lave-linge 1 comporte par ailleurs une pompe de vidange permettant d'évacuer le liquide au fond de cuve 2. La partie inférieure de la cuve 2 comporte une pompe de recyclage munie d'une canalisation de guidage d'eau refoulée par le palier du tambour 4 et une pompe de vidange reliée à une conduite d'évacuation. Des filtres et micro - filtres permettent de recycler l'eau propre pour alimenter en circuit fermé le tambour 3 de manière à économiser le volume d'eau introduit depuis l'extérieur.The washing machine 1 also comprises a drain pump for discharging the liquid at the bottom of the tank 2. The lower part of the tank 2 comprises a recycling pump provided with a water guide pipe discharged by the bearing drum 4 and a drain pump connected to a discharge pipe. Filters and micro-filters make it possible to recycle the clean water to supply the drum 3 in a closed circuit so as to save the volume of water introduced from the outside.

De manière générale, les cycles de lavage et de rinçage sont séquencés en bains par des opérations de vidange durant lesquelles seule la pompe de vidange est actionnée.In general, the washing and rinsing cycles are sequenced in baths by emptying operations during which only the drain pump is actuated.

Bien entendu, la machine à laver le linge conforme à l'invention comporte l'ensemble des équipements et moyens nécessaires à la mise en oeuvre d'un processus de lavage classique dans une telle machine à tambour rotatif.Of course, the washing machine according to the invention comprises all the equipment and means necessary for the implementation of a conventional washing process in such a rotary drum machine.

Seuls les moyens spécifiques à la mise en oeuvre du procédé d'essorage d'un cycle de lavage conforme à l'invention seront décrits ci-après.Only the specific means for carrying out the dewatering process of a washing cycle according to the invention will be described hereinafter.

On va décrire à présent le procédé de dosage de détergent mis en oeuvre dans une machine à laver le linge telle que décrite précédemment.The detergent dosing method used in a washing machine as described above will now be described.

La présente invention vise un procédé d'essorage final d'un cycle de lavage d'une machine à laver le linge 1 comprenant une cuve 2 remplie en liquide à partir d'une prise d'arrivée en eau, un tambour rotatif 3 de chargement du linge, des moyens de commande d'un programme de lavage du linge.The present invention is directed to a method of final spinning of a washing cycle of a washing machine 1 comprising a tank 2 filled with liquid from a water intake, a rotating drum 3 loading laundry, control means of a laundry program.

Selon l'invention, le procédé d'essorage final d'un cycle de lavage d'une machine à laver le linge 1 comprend au moins les étapes suivantes exécutées dans l'ordre mentionné :

  • une première phase d'essorage à un palier de vitesse maximum de rotation du tambour 3 ;
  • une phase de ralentissement de la vitesse de rotation du tambour 3 et ladite vitesse de rotation du tambour 3 étant inférieure à au moins une vitesse de désatellisation du linge ; et.
  • une seconde phase d'essorage à un palier de vitesse maximum de rotation du tambour 3.
According to the invention, the final spinning process of a washing cycle of a washing machine 1 comprises at least the following steps performed in the order mentioned:
  • a first spin phase at a maximum speed rotation speed of the drum 3;
  • a phase of slowing down the speed of rotation of the drum 3 and said speed of rotation of the drum 3 being less than at least one rate of desatellization of the laundry; and.
  • a second spinning phase at a maximum speed of rotation of the drum 3.

Ainsi, le coefficient d'essorage de la machine à laver le linge 1 est amélioré sensiblement. L'enchaînement d'une première phase d'essorage avec une seconde phase d'essorage à une vitesse maximale après une phase de ralentissement de la vitesse de rotation du tambour 3 en dessous d'une vitesse de désatellisation du linge permet d'obtenir de meilleures performances d'essorage sans augmenter la vitesse de rotation du tambour 3.Thus, the spin coefficient of the washing machine 1 is substantially improved. The sequence of a first spinning phase with a second spinning phase at a maximum speed after a phase of slowing down the speed of rotation of the drum 3 below a speed of desatellization of the laundry makes it possible to obtain better spin performance without increasing the rotational speed of the drum 3.

Le procédé d'essorage conforme à l'invention permet d'améliorer le coefficient d'essorage de l'ordre de 5% par rapport à un cycle d'essorage final classique.The spinning method according to the invention makes it possible to improve the spin coefficient of the order of 5% compared to a conventional final spin cycle.

La désatellisation du linge dans le tambour 3 intervient dès que la force centrifuge exercée par la vitesse de rotation du tambour 3 est sensiblement inférieure à la force de pesanteur exercée par les pièces de linge contenues dans ledit tambour 3.The desatellization of the laundry in the drum 3 occurs as soon as the centrifugal force exerted by the speed of rotation of the drum 3 is substantially less than the force of gravity exerted by the laundry items contained in said drum 3.

La vitesse de désatellisation du linge est comprise entre 50 et 75 tours par minute, et préférentiellement de l'ordre de 50 tours par minute.The speed of desatellization of the laundry is between 50 and 75 revolutions per minute, and preferably of the order of 50 revolutions per minute.

Ce procédé d'essorage peut être intégré dans toute machine à laver le linge 1 sans aucune modification structurelle. Ce procédé d'essorage n'engendre aucun surcoût sur le coût d'obtention de la machine à laver le linge 1.This spinning process can be integrated into any washing machine 1 without any structural modification. This spinning process does not generate any additional cost on the cost of obtaining the washing machine 1.

L'amélioration des performances d'essorage permet de répondre plus aisément aux normes environnementales en vigueur.Improved spinning performance makes it easier to meet current environmental standards.

En outre, l'enchaînement des phases d'essorage du procédé est sans contrainte supplémentaire sur les éléments constituant la machine à laver le linge 1. Seule la fatigue mécanique peut être influencée selon la durée des différents paliers de vitesse des phases d'essorage.In addition, the sequencing of the spinning process phases is without additional constraints on the elements constituting the washing machine 1. Only mechanical fatigue can be influenced according to the duration of the various speed stages of the spin phases.

La phase de ralentissement de la vitesse de rotation du tambour 3 en dessous d'au moins une vitesse de désatellisation du linge a pour rôle de décoller au moins en partie les pièces de linge des parois du tambour 3 et permettre une nouvelle distribution du linge à l'intérieur dudit tambour 3.The step of slowing down the speed of rotation of the drum 3 below at least one desatellizing speed of the laundry acts to take off at least part of the laundry pieces from the walls of the drum 3 and to allow a new distribution of the laundry to inside said drum 3.

Le procédé d'essorage conforme à l'invention est préférentiellement mis en oeuvre à la fin d'un cycle de lavage d'une machine à laver le linge 1 pour améliorer les performances d'essorage. Il s'agit d'un cycle d'essorage final avant l'arrêt en rotation du tambour 3 pour permettre le déchargement du linge introduit dans ledit tambour 3. De cette manière, le linge contient une quantité minimum d'eau et permettant de réaliser le séchage de celui-ci le plus rapidement possible.The spinning process according to the invention is preferably carried out at the end of a washing cycle of a washing machine 1 to improve the spinning performance. This is a final spin cycle before stopping rotation of the drum 3 to allow unloading of the laundry introduced into said drum 3. From In this way, the laundry contains a minimum amount of water and allows the drying of the latter as quickly as possible.

Le procédé d'essorage conforme à l'invention peut également être suivi d'un cycle de séchage lors de la mise en oeuvre de l'invention dans une lavante-séchante.The spinning method according to the invention can also be followed by a drying cycle during the implementation of the invention in a washer-dryer.

Dans un premier mode de réalisation de l'invention, les première et seconde phases d'essorage peuvent être identiques. Les paliers de vitesse de rotation du tambour 3 peuvent être identiques au cours desdites première et seconde phases d'essorage. De même, les durées des paliers de vitesse de rotation du tambour 3 peuvent être identiques au cours desdites première et seconde phases d'essorage.In a first embodiment of the invention, the first and second spinning phases may be identical. The rotational speed bearings of the drum 3 may be identical during said first and second spin phases. Likewise, the durations of the rotational speed bearings of the drum 3 may be identical during said first and second spinning phases.

Dans un second mode de réalisation de l'invention, les première et seconde phases d'essorage peuvent être différentes. Les paliers de vitesse de rotation du tambour 3 peuvent être différents au cours desdites première et seconde phases d'essorage. De même, les durées des paliers de vitesse de rotation du tambour 3 peuvent être différentes au cours desdites première et seconde phases d'essorage.In a second embodiment of the invention, the first and second spin phases may be different. The rotational speed bearings of the drum 3 may be different during said first and second spinning phases. Likewise, the durations of the rotational speed bearings of the drum 3 may be different during said first and second spinning phases.

Dans un mode de réalisation préféré de l'invention illustré à la figure 2, les paliers de vitesse de rotation du tambour 3 sont identiques au cours desdites première et seconde phases d'essorage avec des durées de paliers de vitesse de rotation du tambour 3 plus courtes au cours de la seconde phase d'essorage.In a preferred embodiment of the invention illustrated in figure 2 , the rotational speed bearings of the drum 3 are identical during said first and second spinning phases with shorter rotation speed bearings 3 of the drum 3 during the second spinning phase.

Un procédé d'essorage conforme à l'invention est défini par la vitesse de rotation maximale du tambour 3, les paliers de vitesse de rotation du tambour 3 au cours des deux phases d'essorage, et des durées desdits paliers de vitesse de rotation. Ledit procédé d'essorage permet d'améliorer l'efficacité de l'essorage et d'optimiser les contraintes mécaniques subies les éléments constituant la machine à laver le linge 1.A spinning method according to the invention is defined by the maximum speed of rotation of the drum 3, the rotational speed bearings of the drum 3 during the two spinning phases, and the durations of said rotational speed bearings. Said spinning method makes it possible to improve the efficiency of the spinning and to optimize the mechanical stresses on the elements constituting the washing machine 1.

Le procédé d'essorage conforme à l'invention peut être limité à un certain nombre de cycles de lavage d'une machine à laver le linge 1 nécessitant un rendement élevé lors du cycle d'essorage.The spinning method according to the invention can be limited to a number of washing cycles of a washing machine 1 requiring a high efficiency during the spin cycle.

La calcul du coefficient d'essorage est obtenu en mesurant la différence de masse de la charge de linge mouillée après un cycle d'essorage par rapport à la masse de la même charge de linge sèche avant le départ d'un cycle de lavage, puis cette différence de masse correspondant à la masse d'eau contenue dans le linge après un cycle d'essorage est divisée par la masse de la charge de linge sèche avant le départ d'un cycle de lavage.The calculation of the spin coefficient is obtained by measuring the mass difference of the wet load of laundry after a spin cycle with respect to the mass of the same load of dry laundry before the start of a wash cycle, then this mass difference corresponding to the mass of water contained in the laundry after a spin cycle is divided by the mass of the dry laundry load before the start of a wash cycle.

Les performance d'essorage sont obtenus essentiellement en agissant sur trois paramètres influents. Le premier paramètre influent est la vitesse maximale de rotation du tambour 3. Le second paramètre influent est le temps de montée en vitesse de rotation du tambour 3 entre les différents paliers de vitesse, pouvant être exprimé également par l'accélération. Le troisième paramètre influent est la durée des paliers de vitesse de rotation du tambour 3 et en particulier la durée du palier final à la vitesse de rotation maximale.The spin performance is obtained essentially by acting on three influential parameters. The first influential parameter is the maximum speed of rotation of the drum 3. The second influential parameter is the rise time in rotation speed of the drum 3 between the different speed stages, which can also be expressed by the acceleration. The third influential parameter is the duration of the speed rotation of the drum 3 and in particular the duration of the final bearing at the maximum rotational speed.

Comme on l'a exprimé précédemment, la vitesse de rotation maximale ne peut être augmentée de manière indéfinie à cause des contraintes mécaniques en jeu dans une machine à laver le linge 1.As previously stated, the maximum rotational speed can not be increased indefinitely because of the mechanical stresses involved in a washing machine 1.

Les temps de montée en vitesse de rotation du tambour 3 sont limités par les caractéristiques du moteur d'entraînement du tambour 3.The rise times in rotational speed of the drum 3 are limited by the characteristics of the driving motor of the drum 3.

Puis les durées de paliers de vitesse de rotation du tambour 3 sont également limitées d'une part à cause des caractéristiques du moteur et d'autre part à cause du phénomène de fatigue des éléments constituant les machines à laver le linge. Plus la durée des paliers de vitesse de rotation du tambour 3 sont longs, plus la durée de vie de la machine à laver le linge 1 est courte et en particulier celle du tambour 3. Par ailleurs, les performances d'essorage à chaque palier de vitesse de rotation du tambour 3 atteignent une asymptote à partir d'une durée relativement courte. La force centrifuge exercée sur la charge de linge pendant la rotation du tambour 3 au cours d'une phase d'essorage permet d'expulser une quantité d'eau à chaque palier de vitesse sans pouvoir dépasser un seuil.Then the rotational speed bearings times of the drum 3 are also limited firstly because of the characteristics of the engine and secondly because of the phenomenon of fatigue of the elements constituting the washing machines. The longer the rotational speed bearings of the drum 3 are, the longer the life of the washing machine 1 is short and particularly that of the drum 3. Moreover, the spin performance at each level of Drum rotation speed 3 reach an asymptote from a relatively short duration. The centrifugal force exerted on the load of laundry during the rotation of the drum 3 during a spinning phase makes it possible to expel a quantity of water at each speed step without being able to exceed a threshold.

La demanderesse a pu constater ces effets au cours de ses expérimentations sur les cycles d'essorage et a abouti au procédé d'essorage conforme à l'invention pour améliorer l'efficacité de l'essorage et diminuer les risques par rapport à la tendance du marché de l'électroménager recherchant une vitesse de rotation du tambour maximale de plus en plus élevée lors de l'essorage final.The Applicant has been able to note these effects during his experiments on the spin cycles and has resulted in the spinning method according to the invention to improve the efficiency of the spin and reduce the risks compared to the trend of the spin. appliance market looking for a higher and higher drum rotation speed during the final spin.

Les durées de la première et de la seconde phase d'essorage peuvent être identiques ou encore la première phase d'essorage plus longue que la seconde phase d'essorage.The durations of the first and second spin phase may be identical or the first spin phase longer than the second spin phase.

Par ailleurs, l'enchaînement des deux phases d'essorage du procédé conforme à l'invention peut avoir une durée sensiblement égale à la durée d'une phase d'essorage d'un cycle classique. De cette manière, la consommation d'électricité peut être du même ordre tout en augmentant les performances d'un cycle de lavage de la machine à laver le linge.Furthermore, the sequencing of the two spinning phases of the process according to the invention may have a duration substantially equal to the duration of a spin phase of a conventional cycle. In this way, the electricity consumption can be of the same order while increasing the performance of a washing cycle of the washing machine.

La vitesse maximum de rotation du tambour 3 est comprise entre 1000 et 1600 tours par minute telle qu'utilisée classiquement sur les machines à laver le linge.The maximum speed of rotation of the drum 3 is between 1000 and 1600 revolutions per minute as conventionally used on washing machines.

Bien entendu, la vitesse maximum de rotation du tambour 3 n'est pas limitée et peut prendre toute valeur déterminée par le fabricant de machine à laver le linge 1 en fonction de la conception de ladite machine 1.Of course, the maximum speed of rotation of the drum 3 is not limited and can take any value determined by the washing machine manufacturer 1 according to the design of said machine 1.

L'écart entre les paliers de vitesse de rotation maximum lors des première et seconde phases d'essorage est compris dans une plage s'étendant entre 0 et 100 tours par minute.The difference between the maximum rotational speed increments during the first and second spin phases is in a range of 0 to 100 revolutions per minute.

Cet écart peut être dû à la différence de masse entre la première phase d'essorage et la seconde phase d'essorage. Une partie de l'eau contenue par la charge de linge lors de la première phase d'essorage est expulsée et le moteur d'entraînement du tambour 3 peut permettre d'augmenter légèrement la vitesse de rotation du tambour 3 lors de la seconde phase d'essorage.This difference may be due to the mass difference between the first spin phase and the second spin phase. Part of the water contained by the laundry load during the first spin phase is expelled and the drive motor of the drum 3 can slightly increase the speed of rotation of the drum 3 during the second phase of drying. 'spinning.

De cette manière, la vitesse de rotation du tambour 3 maximum peut être obtenue sans risque d'endommagement des éléments constituant la machine à laver le linge 1.In this way, the speed of rotation of the maximum drum 3 can be achieved without risk of damage to the elements constituting the washing machine 1.

La phase de ralentissement de la vitesse de rotation du tambour 3 est mise en oeuvre jusqu'à une vitesse de rotation du tambour 3 inférieure ou égale à une vitesse de désatellisation du linge.The phase of slowing down the speed of rotation of the drum 3 is implemented until a speed of rotation of the drum 3 less than or equal to a speed of desatellization of the laundry.

Ainsi, le linge contenu dans le tambour 3 se décolle au moins en partie des parois dudit tambour 3 par un mouvement de rotation lent pour permettre une nouvelle distribution du linge à l'intérieur dudit tambour 3 avant la seconde phase d'essorage du procédé conforme à l'invention.Thus, the laundry contained in the drum 3 comes off at least in part from the walls of said drum 3 by a slow rotational movement to allow a new distribution of the laundry inside said drum 3 before the second spin phase of the process according to to the invention.

Les pièces de linge sont réparties différemment à l'intérieur du tambour 3 et de cette manière l'expulsion d'eau contenue par cette charge de linge est favorisée lors de la seconde phase d'essorage du procédé. Les performances d'essorage globales sont ainsi améliorées.The pieces of laundry are distributed differently inside the drum 3 and in this way the expulsion of water contained by this load of laundry is favored during the second spinning phase of the process. The overall spin performance is thus improved.

La vitesse de brassage du linge est comprise entre 30 et 60 tours par minute, et préférentiellement de l'ordre de 50 tours par minute.The brewing speed of the laundry is between 30 and 60 revolutions per minute, and preferably of the order of 50 revolutions per minute.

La phase de ralentissement de la vitesse de rotation du tambour 3 est suivie d'une phase d'arrêt du tambour 3, et ladite phase d'arrêt du tambour 3 précédant la seconde phase d'essorage.The phase of slowing down the speed of rotation of the drum 3 is followed by a stop phase of the drum 3, and said stopping phase of the drum 3 preceding the second spinning phase.

Ainsi, les pièces de linge se décollent au moins en partie des parois du tambour 3 par la force de pesanteur pour permettre une nouvelle distribution du linge à l'intérieur dudit tambour 3 avant la seconde phase d'essorage du procédé conforme à l'invention.Thus, the pieces of laundry are detached at least in part from the walls of the drum 3 by the force of gravity to allow a new distribution of the laundry inside said drum 3 before the second phase of spinning of the process according to the invention .

Les pièces de linge sont réparties différemment à l'intérieur du tambour 3 et de cette manière l'expulsion d'eau contenue par cette charge de linge est favorisée lors de la seconde phase d'essorage du procédé. Les performances d'essorage globales sont ainsi améliorées.The pieces of laundry are distributed differently inside the drum 3 and in this way the expulsion of water contained by this load of laundry is favored during the second spinning phase of the process. The overall spin performance is thus improved.

La phase d'arrêt du tambour 3 est suivie d'une phase de brassage pour redistribuer le linge à l'intérieur du tambour 3, et ladite phase de brassage du linge précédant la seconde phase d'essorage.The stopping phase of the drum 3 is followed by a brewing phase to redistribute the laundry inside the drum 3, and said brewing phase of the laundry preceding the second spinning phase.

Ainsi, une phase de défoulage du linge est mise en oeuvre entre les deux phases d'essorage du procédé conforme à l'invention de manière à redistribuer la charge de linge à l'intérieur du tambour 3. Les pièces de linge placées au centre du tambour 3 au cours de la première phase d'essorage n'ayant été soumises qu'à une force centrifuge limitée compte tenu de leur position dans le tambour 3 se déplacent au moins en partie en direction de la périphérie du tambour 3. Une position des pièces de linge plus proche de la périphérie du tambour 3 permettra une force centrifuge plus élevée au regard de la distance au centre du tambour 3.Thus, a phase of unfolding the laundry is implemented between the two spinning phases of the process according to the invention so as to redistribute the load of laundry inside the drum 3. The pieces of laundry placed in the center of the drum 3 during of the first spin phase having been subjected only to a limited centrifugal force in view of their position in the drum 3 move at least partly in the direction of the periphery of the drum 3. A position of the clothes more near the periphery of the drum 3 will allow a higher centrifugal force with respect to the distance to the center of the drum 3.

Les premières et secondes phases d'essorage sont précédées d'une phase de détection de balourd et de répartition du linge dans le tambour 3.The first and second spinning phases are preceded by a phase of unbalance detection and distribution of the laundry in the drum 3.

Ainsi, les deux phases d'essorage sont réalisées en toute sécurité pour la machine à laver le linge 1. Cette dernière ne subit aucune contrainte mécanique pouvant engendrer un endommagement lors de la montée en vitesse de rotation du tambour 3. La charge de linge est répartie de manière homogène à l'intérieur du tambour 3 et se plaque uniformément contre la paroi périphérique du tambour 3.Thus, the two spinning phases are carried out safely for the washing machine 1. The latter undergoes no mechanical stress that can cause damage during the rise in speed of rotation of the drum 3. The load of laundry is distributed homogeneously inside the drum 3 and plate uniformly against the peripheral wall of the drum 3.

Au moins un moyen de défoulage est mis en oeuvre au cours de la phase de brassage pour redistribuer le linge à l'intérieur du tambour 3.At least one release means is used during the stirring phase to redistribute the laundry inside the drum 3.

Ainsi, au moins un moyen de défoulage est mis en oeuvre au cours de la phase de brassage pour décoller les pièces de linge de la paroi périphérique du tambour. Ce moyen de défoulage permet de favoriser le décollement du linge ayant une tendance à adhérer au tambour suite à la première phase d'essorage réalisée à un palier de vitesse maximum de rotation du tambour. Les pièces de linge peuvent ainsi se mélanger de nouveau pour créer une nouvelle distribution de la charge de linge à l'intérieur du tambour avant la seconde phase d'essorage et par conséquent améliorer l'efficacité de l'essorage.Thus, at least one release means is implemented during the brewing phase to take off the laundry items from the peripheral wall of the drum. This release means makes it possible to promote the detachment of the laundry having a tendency to adhere to the drum following the first spinning phase carried out at a maximum speed of rotation of the drum. The laundry pieces can thus be mixed again to create a new distribution of the laundry load inside the drum before the second spinning phase and therefore improve the efficiency of the spinning.

Dans un mode de réalisation de l'invention, ledit au moins un moyen de défoulage mis en oeuvre au cours de la phase de brassage est une phase d'ajout d'eau dans la cuve de lavage 2.In one embodiment of the invention, said at least one release means used during the brewing phase is a water addition phase in the washing tank 2.

La phase d'ajout d'eau dans la cuve de lavage 2 permet de décoller les pièces de linge de la paroi périphérique du tambour 3.The phase of adding water into the washing tub 2 makes it possible to unstick the pieces of linen from the peripheral wall of the drum 3.

Ce rajout d'eau peut être réalisé selon deux modes de réalisation de l'invention :

  • dans un premier mode de réalisation, la pompe de vidange est arrêtée et un ajout d'eau est effectué en fond de cuve de lavage 2 jusqu'à remplir sensiblement légèrement plus qu'un volume mort. Le niveau d'eau peut être contrôlé par un pressostat analogique par exemple. Le tambour 3 est entraîné en rotation et les pièces de linge situées contre la virole du tambour 3 viennent lécher le niveau d'eau en fond de cuve 2. Ces pièces de linge absorbent une partie de la quantité d'eau et se décollent de la surface intérieure du tambour 3.
  • dans un second mode de réalisation, le même effet de décollement des pièces de linge de la virole du tambour 3 peut être obtenu par un arrosage du tambour 3 en partie supérieure. De l'eau ruisselle contre la virole du tambour 3, ce dernier étant entraîné en rotation à une faible vitesse de rotation. Par la présence d'eau sur cette partie du tambour 3, les pièces de linge situées contre la virole dudit tambour 3 se décollent de la surface intérieure dudit tambour 3.
This addition of water can be achieved according to two embodiments of the invention:
  • in a first embodiment, the drain pump is stopped and an addition of water is carried out at the bottom of the washing tank 2 to fill substantially slightly more than a dead volume. The water level can be controlled by an analog pressure switch for example. The drum 3 is rotated and the pieces of laundry located against the shell of the drum 3 lick the water level at the bottom of the tank 2. These pieces of laundry absorb a portion of the amount of water and come off the ground. inner surface of the drum 3.
  • in a second embodiment, the same detachment effect of the laundry pieces of the shell of the drum 3 can be obtained by watering drum 3 in the upper part. Water flows against the shell of the drum 3, the latter being rotated at a low rotational speed. By the presence of water on this part of the drum 3, the pieces of laundry located against the shell of said drum 3 are detached from the inner surface of said drum 3.

La faible quantité d'eau introduite dans la cuve 2 est expulsée en dehors des pièces de linge lors de la seconde phase d'essorage du procédé conforme à l'invention.The small amount of water introduced into the tank 2 is expelled outside the laundry rooms during the second spinning phase of the process according to the invention.

Dans un autre mode de réalisation de l'invention, ledit au moins un moyen de défoulage mis en oeuvre au cours de la phase de brassage est une phase de freinage brusque du tambour 3.In another embodiment of the invention, said at least one release means used during the stirring phase is a sudden braking phase of the drum 3.

La phase de freinage brusque du tambour 3 permet d'exercer une force contraire à la force d'adhérence s'exerçant entre la paroi périphérique du tambour 3 et les pièces de linge. Cette force d'adhérence est notamment liée à la première phase d'essorage du procédé conforme à l'invention où la charge de linge est plaquée contre la paroi périphérique du tambour 3.The sudden braking phase of the drum 3 makes it possible to exert a force contrary to the adhesive force exerted between the peripheral wall of the drum 3 and the pieces of laundry. This adhesion force is particularly related to the first spinning phase of the process according to the invention where the load of laundry is pressed against the peripheral wall of the drum 3.

La détection du défoulage du linge au cours de la phase de brassage peut être réalisée par une mesure de variation de la vitesse de rotation du tambour 3. La détection du défoulage correspond à la détection du décollement du linge de la paroi périphérique du tambour 3.The detection of the release of the laundry during the stirring phase can be achieved by a measurement of variation of the rotational speed of the drum 3. The detection of the uncoupling corresponds to the detection of the detachment of the laundry from the peripheral wall of the drum 3.

Ladite mesure de variation de la vitesse de rotation du tambour 3 peut être exécutée sur un palier de vitesse de rotation inférieur à la vitesse de satellisation du linge dans le tambour 3. Le palier de vitesse de rotation pour réaliser la mesure de variation de vitesse de rotation du tambour 3 peut être de l'ordre de 40 tours par minute.Said measure of variation of the speed of rotation of the drum 3 can be performed on a rotational speed bearing lower than the speed of orisation of the laundry in the drum 3. The rotational speed bearing to realize the measurement of speed variation of rotation of the drum 3 may be of the order of 40 revolutions per minute.

La détection du défoulage est obtenue lorsque la charge de linge est non plaquée sur la paroi périphérique du tambour 3 et que celle-ci est brassée à l'intérieur dudit tambour 3. Le brassage du linge à l'intérieur du tambour 3 engendre de fortes variations de la vitesse de rotation du tambour 3 par rapport à la vitesse de consigne.The detection of the loosening is obtained when the load of laundry is not plated on the peripheral wall of the drum 3 and that it is brewed inside said drum 3. The brewing of the laundry inside the drum 3 generates strong variations in the speed of rotation of the drum 3 with respect to the target speed.

Dans le cas contraire, l'absence de mouvement de linge à l'intérieur du tambour 3 est détectée par une faible variation de vitesse de rotation du tambour 3.In the opposite case, the absence of movement of the laundry inside the drum 3 is detected by a small variation in the rotational speed of the drum 3.

Claims (6)

  1. A final spin method of a wash cycle of a laundry washing machine comprising a tank (2) filled with liquid from a water inlet, a rotating drum (3) for loading laundry into, means of controlling (4) a laundry washing programme, said method comprising at least the following steps executed in the order given:
    - a first spin phase at a maximum rotational speed level of the drum (3);
    - a phase of slowing the rotational speed of the drum (3) and said rotational speed of the drum (3) being less than at least one laundry sub-centrifugal speed;
    - a phase of turning off the drum (3);
    - a tumbling phase to redistribute the laundry within the drum (3); and
    - a second spin phase at a maximum rotational speed level of the drum (3); characterized in that the maximum rotational speed level of the drum (3) is between 1000 and 1600 revolutions per minute, in that at least one means of release is implemented during the tumbling phase in order to redistribute the laundry within the drum (3) so as to separate pieces of laundry from the peripheral wall of the drum (3), wherein said at least one means of release implemented during the tumbling phase is a phase of adding water into the wash tub (2) or a phase of suddenly stopping the drum (3).
  2. A final spin method of a wash cycle of a laundry washing machine according to claim 1, characterized in that the phase of slowing the rotational speed of the drum (3) is implemented until it reaches a rotational speed of the drum (3) that is less than or equal to a laundry sub-centrifugal speed.
  3. A final spin method of a wash cycle of a laundry washing machine according to claim 1 or 2, characterized in that the first and second spin phases are preceded by a phase of detecting imbalance and of distributing laundry within the drum (3).
  4. A final spin method of a wash cycle of a laundry washing machine according to any one of the claims 1 to 3, characterized in that the laundry sub-centrifugal speed is between 50 and 75 revolutions per minute, and preferentially on the order of 50 revolutions per minute.
  5. A final spin method of a wash cycle of a laundry washing machine according to any one of the claims 1 to 4, characterized in that the laundry tumbling speed is between 30 and 60 revolutions per minute, and preferentially in the order of 50 revolutions per minute.
  6. A final spin method of a wash cycle of a laundry washing machine according to any one of the preceding claims, characterized in that the difference between the maximum rotational speed levels during the first and second spin phases is in a range of between 0 and 100 revolutions per minute.
EP07118345.3A 2006-10-12 2007-10-12 Final spin-drying process in a washing cycle of a washing machine Active EP1911869B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0609027A FR2907134B1 (en) 2006-10-12 2006-10-12 METHOD OF FINALLY SPINNING A WASHING CYCLE OF A WASHING MACHINE

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EP1911869A1 EP1911869A1 (en) 2008-04-16
EP1911869B1 true EP1911869B1 (en) 2016-12-07

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ES (1) ES2616760T3 (en)
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MX2009002331A (en) 2009-02-27 2010-03-23 Mabe Sa De Cv Centrifuge method with rinsing.

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CA2053445C (en) * 1990-10-16 1999-05-11 Tatuo Akabane Tumbler type washing/drying machine and method of controlling the same
IT1267586B1 (en) * 1994-09-28 1997-02-07 Zanussi Elettrodomestici WASHING MACHINE WITH PERFECTED ANTI-UNBALANCING DEVICE
AU2004202639B2 (en) * 2003-06-20 2011-01-27 Lg Electronics Inc. Washing method in washing machine including semi-drying cycle and control apparatus therefor
JP4358858B2 (en) * 2003-07-25 2009-11-04 エルジー エレクトロニクス インコーポレイティド Semi-drying method of washing machine and ventilation structure and control device therefor
US7451510B2 (en) * 2003-07-25 2008-11-18 Lg Electronics, Inc. Washing machine and method of performing spinning operation
KR101065690B1 (en) * 2004-06-25 2011-09-19 엘지전자 주식회사 method for controlling dehydration in drum-type washing machine

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EP1911869A1 (en) 2008-04-16
FR2907134B1 (en) 2008-12-12
ES2616760T3 (en) 2017-06-14
FR2907134A1 (en) 2008-04-18

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