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EP0042190A1 - Method to determine the average nature of the constitutive material of the laundry introduced into a washing machine, and washing machine to carry out this method - Google Patents

Method to determine the average nature of the constitutive material of the laundry introduced into a washing machine, and washing machine to carry out this method Download PDF

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Publication number
EP0042190A1
EP0042190A1 EP81200631A EP81200631A EP0042190A1 EP 0042190 A1 EP0042190 A1 EP 0042190A1 EP 81200631 A EP81200631 A EP 81200631A EP 81200631 A EP81200631 A EP 81200631A EP 0042190 A1 EP0042190 A1 EP 0042190A1
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EP
European Patent Office
Prior art keywords
laundry
water
volume
machine
tank
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
EP81200631A
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German (de)
French (fr)
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EP0042190B1 (en
Inventor
Michel Steers
Jean-Pierre Hazan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Laboratoires dElectronique Philips SAS
Koninklijke Philips NV
Original Assignee
Laboratoires dElectronique et de Physique Appliquee
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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Application filed by Laboratoires dElectronique et de Physique Appliquee, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Laboratoires dElectronique et de Physique Appliquee
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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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/18—Condition of the laundry, e.g. nature or weight
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/04—Quantity, e.g. weight or variation of weight
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/18—Washing liquid level
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/02—Water supply

Definitions

  • the present invention relates to a method for determining the average nature of the material of the laundry in a washing machine, which method further comprises measuring the weight of the laundry introduced into the machine, recording the volume (V) and the reading of the height (h) of the water introduced into the machine tank. Subsequently, for the sake of abbreviation, we will speak of the average nature of the laundry, it being understood that it is the average nature of the material of which the laundry is made.
  • the object of the present invention is to carry out a process in which the average nature of the linen is determined electronically in the machine, so that an adequate treatment can be applied for each type of linen.
  • the method according to the invention is characterized in that at least one of said readings is carried out continuously during the filling of the tank, that the height (h) read off is compared to at least one reference value, and that when the height of the water in the tank begins to exceed this reference value, the machine determines the nature of the laundry present in the tank by comparing the volume of water absorbed per unit weight of laundry with a series of standard values of this absorbed volume corresponding to different types of laundry.
  • the machine determines the nature of the laundry present in the tank by comparing the volume of water absorbed per unit weight of laundry with a series of standard values of this absorbed volume corresponding to different types of laundry.
  • the method according to the invention excludes this human error, since it is the washing machine itself which determines the nature of the laundry.
  • the method according to the invention is particularly characterized in that the volume of water absorbed per unit weight of laundry is compared with three standard values, which standard values correspond to three curves representing the height (h) of the water introduced into the tank as a function of the volume (V) ′ of the water introduced into the tank, which three curves being a first curve corresponding to the absence of laundry in the machine, a second curve corresponding to the presence of laundry made of absorbent material, and a third curve corresponding to the presence of linen of little or no absorbent material; the nature of the laundry being appreciated in the geometric differences with respect to each other of the representative curves in Cartesian coordinates, in each case, variations in the height h of water in the tank as a function of the volume V d water introduced.
  • the fabric is very absorbent, in wool or cotton for example, when water is introduced, it will first be absorbed by the linen in proportion to the weight of the linen introduced, so that a water level will take a long time ... to settle in the tank.
  • the curve representing the water level h as a function of the volume V will have a plateau parallel to the abscissa axis, the length of which, equal to the volume of water absorbed, is characteristic of the presence of the wool and of the weight thereof. this.
  • the representative curve does not have a plateau and will be very close to the theoretical curve (without linen), which is characteristic of said synthetic fabric.
  • the method according to the invention is particularly characterized in that said reference value corresponds to the level of a level of said second curve, which level is substantially parallel to the axis of the volume.
  • the advantage of choosing the bearing of the second curve as a reference value lies in the fact that the presence of a bearing indicates the presence of laundry made of absorbent materials in the tank of the washing machine, which absorbent materials prevent the level d water to rise in the tank.
  • the method according to the invention is characterized in that the filling of the tank comprises at its beginning a sequence of alternating periods of respectively resting and successively rotating the drum of the machine, which sequence continues until the disappearance of an indication, for the height of the water, of a constant average value over time, this because it is necessary to take into account the speed of absorption of the water by the linen, which can delay the installation of the bearing.
  • the admission of water into the tank has a sequence of stop and opening periods, the instantaneous level of the water inside the tank oscillates around an average value corresponding to - bearing.
  • the invention also relates to a washing machine for carrying out the method according to the invention, which machine comprises a device for measuring the weight of the laundry introduced into the machine and electronic means memorizing the weight of the laundry.
  • This washing machine for implementing the method according to the invention is characterized in that it comprises a device for continuously measuring the volume of water introduced into the tank, and a device for continuously measuring the water level. , a device for determining the volume of water absorbed per unit weight of laundry having a first input connected to the device for continuously measuring the volume of water and a second input connected to electronic means memorizing the weight of the laundry, which device having an outlet connected to a device for identifying the average nature of the laundry introduced into the tank.
  • the volume of water absorbed per unit of weight is compared with typical values in order to determine the average nature of the laundry.
  • a washing machine has a so-called volume memory for memorizing the volume. water introduced into the machine; it is further characterized in that it also includes a first comparator block for comparing the measured water level with a reference level and for generating a validation signal when the measured level is greater than the reference level, which signal validation is applied to the so-called volume memory, a divider block, having a first input connected to the so-called volume memory and a second input connected to the electronic means memorizing the weight of the laundry, to determine the quotient between the value of the volume of water present in the tank upon receipt of the validation signal and the weight of the laundry, a second comparator block connected to an output of said divider block to compare the quotient signal at the output of the divider block with typical volume volume quotients water absorbed per unit of linen weight corresponding to various known qualities of linen.
  • the method according to the invention is carried out in a simple and inexpensive manner in a washing machine.
  • the invention uses the information collected by implementing the process on board the machine to control devices for choosing the washing cycles depending both on the nature of the laundry to be washed and the quantity of it present in the machine, said devices being part of the machine.
  • the tank of the washing machine is roughly a cylinder with circular section of radius R and whose length axis L is horizontal
  • the volume V of water in the tank is connected in l absence of laundry at the height h of the level in this tank according to the expression:
  • Curve A in Figure 1 represents the variation of h as a function of V according to this expression. It is the curve recorded, according to the method of the invention, in the absence of laundry by measuring, continuously and simultaneously during the filling of the tank of the machine, that is to say the height h of the level inside the tank either the volume V of water introduced into the machine or both at the same time.
  • the filling is carried out in the presence of an absorbent cloth, wool for example. Absorption takes place naturally with a certain delay. It is favored by agitation of the tissue in water.
  • the filling of the tank according to the invention comprises at the beginning a sequence of periods of opening and stopping the admission of water into the machine, the stopping periods being used to carry out an agitation of the laundry by placing 'in rotation during each stopping period of the rotating drum containing the laundry.
  • the water level h inside the tank tends, at the start of filling, to remain low and to perform alternative oscillations around a substantially constant average value.
  • the agitation of the linen is suspended when the absorption capacity of the linen is exhausted and it is noted that the water level tends to rise as in the absence of linen.
  • the observed curve giving the variation of h as a function of V is then in this case the curve of type B located below A.
  • This curve exhibits at its beginning oscillations of the level h of substantially constant mean value corresponding to the period of agitation of the laundry during absorption, this mean value being the ordinate of the PQ level, -and an increasing portion.
  • the PQ level increases the longer the laundry is more abundant or the greater the weight of the laundry. For a given weight of laundry, it is characteristic of the nature of the laundry. Its length is proportional to the weight of the laundry.
  • the measurement of the length of this bearing PQ serves, according to the method of the invention, to determine the nature of the laundry when we know the weight of this laundry introduced into the machine, or even, when we know the nature of the laundry , to determine the weight of laundry present in the machine.
  • the filling is carried out in the presence of a practically non-absorbent cloth or else absorbing a weight of water less than its own weight, which corresponds to a cloth made of synthetic material.
  • the curve taken from h as a function of V is then of type C, close to curve A, and generally located above, in because of the Archimedes push exerted on the linen. The reading of this curve thus provides, according to the above, the means of recognizing linen made of synthetic material.
  • the process is carried out on board washing machines.
  • the washing machine is provided with a volumetric meter for measuring the volume V of water, with a device for continuously measuring the level h, for example of the type which is the subject of French patent application No. 80 13 201, filed on June 13, 1980 and electronic means memorizing the volume of water introduced into the machine and translating the volume of water absorbed per unit weight of laundry.
  • the level sensor device according to the above-mentioned request, consists of an electrically insulated conductor in the form of a circular arc placed in a cross section common to the tank and the drum in the lower part of the tank, the circle having a radius intermediate between those of the tank and the drum and being centered on the axis common to the tank and drum.
  • the weight of the laundry introduced is m 'EASURE for example by measuring the variation of weight of the machine due to the introduction of the laundry in the machine.
  • One means used is for example an electric resistive strain gauge installed between the machine frame and the ground on which the machine rests.
  • block 21 represents the meter with which the volume V of water introduced into the machine is translated into output in an electrical signal proportional to this volume
  • block 22 a comparator into which the water level signal h from the level sensor is introduced as well as a reference signal R which corresponds to the level of the level PQ of the figure 1 of water absorption.
  • This comparator delivers a signal as soon as the water level h is higher than the reference level.
  • This signal from the comparator is introduced into memory 23 which also receives the signal from the water meter. The memory then records the volume of water introduced into the machine which corresponds to the volume of water absorbed Va by the laundry (abscissa of point Q in FIG.
  • the information from the memory is entered in the divider block 25 as well as the dry laundry weight information P from the block 24.
  • the block 25 calculates the quotient V a / P between the volume of water absorbed V a and this weight P.
  • This quotient is introduced into the comparator block 26 as well as standard quotient values relating to different types of laundry.
  • the quotient from 25 is compared with these different standard values to determine the nature of the laundry present in the machine.
  • the washing machine thus has on board information relating to both the nature of the laundry to be washed and the weight thereof.
  • the machine uses this information to control devices for choosing the washing cycles depending both on the nature of the laundry to be washed and the quantity of it present in the machine, said devices being part of the machine.

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

Abstract

Le procédé consiste à effectuer en continu, au cours du remplissage en eau de la cuve de la machine, le relevé de la hauteur d'eau en fonction du volume d'eau introduit et de comparer ces relevés en l'absence, [A], et présence, [B] ou [C], de linge dans la machine. Du fait des propriétés d'absorption du linge, ces relevés sont caractéristiques de la nature du linge. Il est ainsi possible de faire reconnaître par la machine la nature du linge introduit et de lui faire choisir et commander les cycles de lavage le plus appropriés à cette nature.The method consists in continuously carrying out, during the filling of the machine tank with water, the reading of the water height as a function of the volume of water introduced and of comparing these readings in the absence, [A] , and presence, [B] or [C], of laundry in the machine. Due to the absorption properties of the laundry, these readings are characteristic of the nature of the laundry. It is thus possible to have the machine recognize the nature of the laundry introduced and to make it choose and control the washing cycles most suitable for this nature.

Description

La présente invention concerne un procédé de détermination de la nature moyenne du matériau constitutif du linge dans une machine à laver le linge, lequel procédé comprend en outre la mesure du poids du linge introduit dans la machine, le relevé du volume (V) et le relevé de la hauteur (h) de l'eau introduite dans la cuve de la machine. Par la suite, pour abréger, on parlera de nature moyenne du linge étant entendu qu'il s'agit de la nature moyenne du matériau constitutif du linge.The present invention relates to a method for determining the average nature of the material of the laundry in a washing machine, which method further comprises measuring the weight of the laundry introduced into the machine, recording the volume (V) and the reading of the height (h) of the water introduced into the machine tank. Subsequently, for the sake of abbreviation, we will speak of the average nature of the laundry, it being understood that it is the average nature of the material of which the laundry is made.

La connaissance de la nature du linge introduit dans une machine à laver est importante du fait que les traitements et les opérations de lavage que ce linge doit y subir sont spécifiques de cette nature et qu'un traitement inadéquat peut être néfaste audit linge.Knowledge of the nature of the laundry introduced into a washing machine is important because the treatments and washing operations that this laundry must undergo there are specific of this nature and that an inadequate treatment can be harmful to said laundry.

La présente invention a pour but de réaliser un procédé où la nature moyenne du linge est déterminée par voie électronique dans la machine, afin qu'un traitement adéquat puisse être appliqué pour chaque nature de linge.The object of the present invention is to carry out a process in which the average nature of the linen is determined electronically in the machine, so that an adequate treatment can be applied for each type of linen.

Le procédé selon l'invention est caractérisé en ce qu'au moins un desdits relevés est effectué d'une manière continue au cours du remplissage de la cuve, que la hauteur (h) relevée est comparée à au moins une valeur de référence, et que lorsque la hauteur de l'eau dans la cuve commence à dépasser cette valeur de référence, la machine détermine la nature du linge présent dans la cuve en comparant le volume d'eau absorbé par unité de poids de linge à une série de valeurs types de ce volume absorbé correspondant à différentes natures de linge. Ainsi, en utilisant les propriétés d'absorption de l'eau par le linge, lesquelles propriétés interviennent dans le niveau atteint par l'eau dans la cuve pour un volume d'eau introduit dans la cuve, il est possible de déterminer la nature moyenne du linge introduit dans la cuve.The method according to the invention is characterized in that at least one of said readings is carried out continuously during the filling of the tank, that the height (h) read off is compared to at least one reference value, and that when the height of the water in the tank begins to exceed this reference value, the machine determines the nature of the laundry present in the tank by comparing the volume of water absorbed per unit weight of laundry with a series of standard values of this absorbed volume corresponding to different types of laundry. Thus, by using the properties of absorption of water by the linen, which properties intervene in the level reached by the water in the tank for a volume of water introduced into the tank, it is possible to determine the average nature linen introduced into the tank.

Il faut cependant remarquer que les propriétés d'absorption d'eau par le linge sont utilisées dans une autre application avec un autre but, notamment dans la demande de brevet allemand N° 29 20 492. Cette demande décrit un procédé de commande d'une machine à laver le linge du type dit économique. Selon ce procédé, le poids du linge introduit dans la machine est mesuré. Ensuite la cuve est remplie d'eau jusqu'à un niveau calculé sur la base du poids et du genre de lavage choisi par l'utilisateur. Pendant le remplissage en eau de la cuve, la capacité d'absorption d'eau par le linge est déterminée sur la base du volume d'eau introduit et du niveau qui s'établit. Dépendant de la capacité d'absorption et du poids du linge, les niveaux d'eau pour le lavage et le rinçage sont déterminés, afin de ne pas gaspiller de l'eau. Quant à l'indication de la nature du linge, elle est donnée par l'utilisateur même, au moyen d'un bouton sélecteur dont la machine à laver est équipée. L'erreur humaine n'étant pas à exclure, une fausse sélection peut avoir des suites néfastes pour le linge.It should however be noted that the properties of absorption of water by the linen are used in another application with another aim, in particular in the German patent application No. 29 20 492. This application describes a method for controlling a washing machine of the so-called economic type. According to this method, the weight of the laundry introduced into the machine is measured. Then the tank is filled with water up to a level calculated on the basis of the weight and type of washing chosen by the user. During the filling of the tank with water, the capacity of water absorption by the laundry is determined on the basis of the volume of water introduced and the level which is established. Depending on the absorption capacity and the weight of the laundry, the water levels for washing and rinsing are determined, so as not to waste water. As for the indication of the nature of the laundry, it is given by the user himself, by means of a selector button with which the washing machine is equipped. Since human error cannot be ruled out, a false selection can have harmful consequences for laundry.

Le procédé selon l'invention exclut cette erreur humaine, puisque c'est la machine à laver elle-même qui détermine la nature du linge.The method according to the invention excludes this human error, since it is the washing machine itself which determines the nature of the laundry.

Le procédé selon l'invention est particulièrement caractérisé en ce que le volume d'eau absorbé par unité de poids de linge est comparé à trois valeurs types, lesquelles valeurs types correspondent à trois courbes représentant la hauteur (h) de l'eau introduite dans la cuve en fonction du volume (V)'de l'eau introduite dans la cuve, lesquelles trois courbes étant une première courbe correspondant à l'absence de linge dans la machine, une seconde courbe correspondant à la présence de linge en matériau absorbant, et une troisième courbe correspondant à la présence de linge en matériau peu ou pas absorbant; la nature du linge s'appréciant dans les différences géométriques l'une par rapport à l'autre des courbes représentatives en coordonnées cartésiennes, dans chacun des cas, des variations de la hauteur h d'eau dans la cuve en fonction du volume V d'eau introduit. En particulier, si le tissu est très absorbant, en laine ou coton par exemple, lors de l'introduction de l'eau, celle-ci sera d'abord absorbée par le linge proportionnellement au poids du linge introduit, si bien qu'un niveau d'eau tardera..à s'établir dans la cuve. La courbe représentative du niveau d'eau h en fonction du volume V présentera un palier parallèle à l'axe des abscisses dont la longueur, égale au volume d'eau absorbé, est caractéristique de la présence de la laine et du poids de celle-ci. Au contraire, en présence d'un linge peu absorbant, en tissu synthétique par exemple, la courbe représentative ne présente pas de palier et sera très proche de la courbe théorique (sans linge), ce qui est caractéristique dudit tissu synthétique.The method according to the invention is particularly characterized in that the volume of water absorbed per unit weight of laundry is compared with three standard values, which standard values correspond to three curves representing the height (h) of the water introduced into the tank as a function of the volume (V) ′ of the water introduced into the tank, which three curves being a first curve corresponding to the absence of laundry in the machine, a second curve corresponding to the presence of laundry made of absorbent material, and a third curve corresponding to the presence of linen of little or no absorbent material; the nature of the laundry being appreciated in the geometric differences with respect to each other of the representative curves in Cartesian coordinates, in each case, variations in the height h of water in the tank as a function of the volume V d water introduced. In particular, if the fabric is very absorbent, in wool or cotton for example, when water is introduced, it will first be absorbed by the linen in proportion to the weight of the linen introduced, so that a water level will take a long time ... to settle in the tank. The curve representing the water level h as a function of the volume V will have a plateau parallel to the abscissa axis, the length of which, equal to the volume of water absorbed, is characteristic of the presence of the wool and of the weight thereof. this. On the contrary, in the presence of a slightly absorbent cloth, in synthetic fabric for example, the representative curve does not have a plateau and will be very close to the theoretical curve (without linen), which is characteristic of said synthetic fabric.

Le procédé selon l'invention est particulièrement caractérisé en ce que ladite valeur de référence correspond au niveau d'un palier de ladite seconde courbe, lequel palier est sensiblement parallèle à l'axe du volume. L'avantage du choix du palier de la seconde courbe comme valeur de référence réside dans le fait que la présence d'un palier indique la présence de linge en matériaux absorbants dans la cuve de la machine à laver, lesquels matériaux absorbants empêchent le niveau d'eau de monter dans la cuve.The method according to the invention is particularly characterized in that said reference value corresponds to the level of a level of said second curve, which level is substantially parallel to the axis of the volume. The advantage of choosing the bearing of the second curve as a reference value lies in the fact that the presence of a bearing indicates the presence of laundry made of absorbent materials in the tank of the washing machine, which absorbent materials prevent the level d water to rise in the tank.

Avantageusement, le procédé selon l'invention est caractérisé en ce que le remplissage de la cuve comporte à son début une séquence de périodes alternées respectivement de mises au repos et en rotation successives du tambour de la machine, laquelle séquence se poursuit jusqu'à la disparition d'une indication, pour la hauteur de l'eau, d'une valeur moyenne constante au cours du temps, ceci parce qu'il faut tenir compte de la vitesse d'absorption de l'eau par le linge,ce qui peut venir retarder l'installation du palier. Lorsque l'admission de l'eau dans la cuve comporte une séquence de périodes d'arrêt et d'ouverture, le niveau instantané de l'eau à l'intérieur de la cuve effectue des oscillations autour d'une valeur moyenne correspondant au -palier.Advantageously, the method according to the invention is characterized in that the filling of the tank comprises at its beginning a sequence of alternating periods of respectively resting and successively rotating the drum of the machine, which sequence continues until the disappearance of an indication, for the height of the water, of a constant average value over time, this because it is necessary to take into account the speed of absorption of the water by the linen, which can delay the installation of the bearing. When the admission of water into the tank has a sequence of stop and opening periods, the instantaneous level of the water inside the tank oscillates around an average value corresponding to - bearing.

L'invention concerne également une machine à laver le linge pour la mise en oeuvre du procédé selon l'invention, laquelle machine comporte un dispositif de mesure du poids du linge introduit dans la machine et des moyens électroniques mémorisant le poids du linge.The invention also relates to a washing machine for carrying out the method according to the invention, which machine comprises a device for measuring the weight of the laundry introduced into the machine and electronic means memorizing the weight of the laundry.

Cette machine à laver pour mise en oeuvre du procédé selon l'invention est caractérisée en ce qu'elle comporte un dispositif de mesure en continu du volume d'eau introduit dans la cuve, et un dispositif de mesure en continu du niveau d'eau, un dispositif pour déterminer le volume d'eau absorbé par unité de poids de linge ayant une première entrée reliée au dispositif de mesure en continu du volume d'eau et une seconde entrée reliée aux moyens électroniques mémorisant le poids du linge, lequel dispositif ayant une sortie reliée à un dispositif d'identification de la nature moyenne du linge introduit dans la cuve. Dans le dispositif d'identification du linge, le volume d'eau absorbé par unité de poids est comparé aux valeurs types afin de déterminer la nature moyenne du linge.This washing machine for implementing the method according to the invention is characterized in that it comprises a device for continuously measuring the volume of water introduced into the tank, and a device for continuously measuring the water level. , a device for determining the volume of water absorbed per unit weight of laundry having a first input connected to the device for continuously measuring the volume of water and a second input connected to electronic means memorizing the weight of the laundry, which device having an outlet connected to a device for identifying the average nature of the laundry introduced into the tank. In the laundry identification device, the volume of water absorbed per unit of weight is compared with typical values in order to determine the average nature of the laundry.

Avantageusement, une machine à laver le linge selon l'invention comporte une mémoire, dite de volume, pour mémoriser le volume d'eau introduit dans la machine ; elle est en outre caractérisée en ce qu'elle comporte aussi un premier bloc comparateur pour comparer le niveau d'eau mesuré à un niveau de référence et pour générer un signal de validation lorsque le niveau mesuré est supérieur au niveau de référence, lequel signal de validation est appliqué à la mémoire dite de volume, un bloc diviseur, ayant une première entrée connectée à la mémoire dite de volume et une seconde entrée connectée aux moyens électroniques mémorisant le poids du linge, pour déterminer le quotient entre la valeur du volume d'eau présent dans la cuve lors de la réception du signal de validation et le poids du linge, un second bloc comparateur relié à une sortie dudit bloc diviseur pour comparer le signal de quotient à la sortie du bloc diviseur avec des quotients types de volume d'eau absorbé par unité de'poids de linge correspondant à diverses qualités de linge connues.Advantageously, a washing machine according to the invention has a so-called volume memory for memorizing the volume. water introduced into the machine; it is further characterized in that it also includes a first comparator block for comparing the measured water level with a reference level and for generating a validation signal when the measured level is greater than the reference level, which signal validation is applied to the so-called volume memory, a divider block, having a first input connected to the so-called volume memory and a second input connected to the electronic means memorizing the weight of the laundry, to determine the quotient between the value of the volume of water present in the tank upon receipt of the validation signal and the weight of the laundry, a second comparator block connected to an output of said divider block to compare the quotient signal at the output of the divider block with typical volume volume quotients water absorbed per unit of linen weight corresponding to various known qualities of linen.

Ainsi,le procédé selon l'invention est réalisé d'une façon simple et bon marché dans une machine-à laver.Thus, the method according to the invention is carried out in a simple and inexpensive manner in a washing machine.

L'invention utilise l'information recueillie par mise en oeuvre du procédé à bord de la machine pour commander des dispositifs de choix des cycles de lavage fonction à la fois de la nature du linge à laver et de la quantité de celui-ci présente dans la machine, lesdits dispositifs faisant partie de la machine.The invention uses the information collected by implementing the process on board the machine to control devices for choosing the washing cycles depending both on the nature of the laundry to be washed and the quantity of it present in the machine, said devices being part of the machine.

L'invention sera mieux comprise à l'aide de la description suivante de l'invention, ladite description étant accompagnée de dessins qui représentent :

  • Figure 1 : des courbes servant à expliquer le procédé.
  • Figure 2 : un schéma synoptique de moyens électroniques pour mise en oeuvre du procédé.
  • Figure 3 : représente une machine à laver pour la mise en oeuvre du procédé.
The invention will be better understood using the following description of the invention, said description being accompanied by drawings which represent:
  • Figure 1: curves used to explain the process.
  • Figure 2: a block diagram of electronic means for implementing the method.
  • Figure 3: shows a washing machine for implementing the process.

En considérant , par exemple, le cas où la cuve de la machine à laver étant grossièrement un cylindre à section circulaire de rayon R et dont l'axe de longueur L est horizontal, le volume V d'eau dans la cuve est relié en l'absence de linge à la hauteur h du niveau dans cette cuve selon l'expression :

Figure imgb0001
Considering, for example, the case where the tank of the washing machine is roughly a cylinder with circular section of radius R and whose length axis L is horizontal, the volume V of water in the tank is connected in l absence of laundry at the height h of the level in this tank according to the expression:
Figure imgb0001

La courbe A de la figure 1 représente la variation de h en fonction de V selon cette expression. C'est la courbe relevée, selon le procédé de l'invention, en l'absence de linge en mesurant, continûment et simultanément au cours du remplissage de la cuve de la machine, soit la hauteur h du niveau à l'intérieur de la cuve soit le volume V d'eau introduit dans la machine soit les deux à la fois. Supposons maintenant que le remplissage s'effectue en présence d'un linge absorbant, en laine par exemple. L'absorption s'effectue naturellement avec un certain retard. Elle est favorisée par une agitation du tissu dans l'eau. Pour favoriser cette absorption, le remplissage de la cuve selon l'invention comporte au début une séquence de périodes d'ouverture et d'arrêt de l'admission de l'eau dans la machine, les périodes d'arrêt étant mises à profit pour procéder à une agitation du linge par mise 'en rotation au cours de chaque période d'arrêt du tambour tournant contenant le linge. Par suite de cette absorption et de l'agitation périodique du linge dans l'eau, le niveau d'eau h à l'intérieur de la cuve tend, au début du remplissage, à rester faible et à exécuter des oscillations alternatives autour d'une valeur moyenne sensiblement constante. L'agitation du linge est suspendue lorsque le pouvoir d'absorption du linge est épuisé et qu'il est constaté que le niveau de l'eau tend à s'élever comme en l'absence de linge. La courbe relevée donnant la variation de h en fonction de V est alors dans ce cas la courbe du type B située en dessous de A. Cette courbe présente à son début des oscillations du niveau h de valeur moyenne sensiblement constante correspondant à la période d'agitation du linge pendant l'absorption, cette valeur moyenne étant l'ordonnée du palier PQ,-puis une partie croissante. Le palier PQ est d'autant plus long que le linge est plus abondant ou que le poids de linge est grand. Pour un poids de linge donné, il est caractéristique de la nature du linge. Sa longueur est proportionnelle au poids de linge. La mesure de la longueur de ce palier PQ sert, selon le procédé de l'invention, à déterminer la nature du linge lorsqu'on connaît le poids de ce linge introduit dans la machine,ou encore,lorsqu'on connaît la nature de linge,à déterminer le poids de linge présent dans la machine. Supposons maintenant que le remplissage s'effectue en présence d'un linge pratiquement non absorbant ou encore absorbant un poids d'eau inférieur à son propre poids, ce qui correspond à un linge en matière synthétique. La courbe relevée de h en fonction de V est alors de type C, proche de la courbe A, et généralement située au-dessus, en raison de la poussée d'Archimède exercée sur le linge. Le relevé de cette courbe procure ainsi selon le précédé le moyen de reconnaître le linge en matière synthétique.Curve A in Figure 1 represents the variation of h as a function of V according to this expression. It is the curve recorded, according to the method of the invention, in the absence of laundry by measuring, continuously and simultaneously during the filling of the tank of the machine, that is to say the height h of the level inside the tank either the volume V of water introduced into the machine or both at the same time. Suppose now that the filling is carried out in the presence of an absorbent cloth, wool for example. Absorption takes place naturally with a certain delay. It is favored by agitation of the tissue in water. To favor this absorption, the filling of the tank according to the invention comprises at the beginning a sequence of periods of opening and stopping the admission of water into the machine, the stopping periods being used to carry out an agitation of the laundry by placing 'in rotation during each stopping period of the rotating drum containing the laundry. As a result of this absorption and the periodic agitation of the laundry in the water, the water level h inside the tank tends, at the start of filling, to remain low and to perform alternative oscillations around a substantially constant average value. The agitation of the linen is suspended when the absorption capacity of the linen is exhausted and it is noted that the water level tends to rise as in the absence of linen. The observed curve giving the variation of h as a function of V is then in this case the curve of type B located below A. This curve exhibits at its beginning oscillations of the level h of substantially constant mean value corresponding to the period of agitation of the laundry during absorption, this mean value being the ordinate of the PQ level, -and an increasing portion. The PQ level increases the longer the laundry is more abundant or the greater the weight of the laundry. For a given weight of laundry, it is characteristic of the nature of the laundry. Its length is proportional to the weight of the laundry. The measurement of the length of this bearing PQ serves, according to the method of the invention, to determine the nature of the laundry when we know the weight of this laundry introduced into the machine, or even, when we know the nature of the laundry , to determine the weight of laundry present in the machine. Suppose now that the filling is carried out in the presence of a practically non-absorbent cloth or else absorbing a weight of water less than its own weight, which corresponds to a cloth made of synthetic material. The curve taken from h as a function of V is then of type C, close to curve A, and generally located above, in because of the Archimedes push exerted on the linen. The reading of this curve thus provides, according to the above, the means of recognizing linen made of synthetic material.

Le procédé est mis en oeuvre à bord des machines à laver. Pour cela, la machine à laver est munie d'un compteur volumétrique de mesure de volume V d'eau, d'un dispositif de mesure en continu du niveau h par exemple du type faisant l'objet de la demande de brevet français N° 80 13 201, déposée le 13 juin 1980 et de moyens électroniques mémorisant le volume d'eau introduit dans la machine et traduisant le volume d'eau absorbé par unité de poids de linge. Le dispositif capteur de niveau, selon la demande ci-dessus indiquée, est constitué d'un conducteur isolé électriquement en forme d'arc de cercle placé selon une section droite commune à la cuve et au tambour dans la partie inférieure de la cuve, le cercle ayant un rayon intermédiaire entre ceux de la cuve et du tambour et étant centré sur l'axe commun aux cuve et tambour. Par ailleurs, le poids du linge introduit est m'esuré par exemple en mesurant la variation de poids de la machine due à l'introduction du linge dans la machine. Un moyen utilisé est par exemple une jauge de contrainte à effet résistif électrique installée entre bâti de la machine et le sol sur lequel repose la machine.The process is carried out on board washing machines. For this, the washing machine is provided with a volumetric meter for measuring the volume V of water, with a device for continuously measuring the level h, for example of the type which is the subject of French patent application No. 80 13 201, filed on June 13, 1980 and electronic means memorizing the volume of water introduced into the machine and translating the volume of water absorbed per unit weight of laundry. The level sensor device, according to the above-mentioned request, consists of an electrically insulated conductor in the form of a circular arc placed in a cross section common to the tank and the drum in the lower part of the tank, the circle having a radius intermediate between those of the tank and the drum and being centered on the axis common to the tank and drum. Moreover, the weight of the laundry introduced is m 'EASURE for example by measuring the variation of weight of the machine due to the introduction of the laundry in the machine. One means used is for example an electric resistive strain gauge installed between the machine frame and the ground on which the machine rests.

Sur la figure 2 indiquant à titre d'exemple un schéma synoptique de moyens électroniques permettant la mise en oeuvre du procédé à bord de la machine, le bloc 21 représente le compteur avec lequel le volume V d'eau introduit dans la machine est traduit en sortie en un signal électrique proportionnel à ce volume, le bloc 22 un comparateur dans lequel est introduit le signal de niveau h d'eau issu du capteur de niveau ainsi qu'un signal de référence R qui correspond au niveau du palier PQ de la figure 1 d'absorption d'eau. Ce comparateur délivre un signal dès que le niveau h d'eau est supérieur au niveau de référence. Ce signal issu du comparateur est introduit dans la mémoire 23 qui reçoit également le signal en provenance du compteur d'eau. La mémoire enregistre alors le volume d'eau introduit dans la machine qui correspond au volume d'eau absorbé Va par le linge (abscisse du point Q de la figure 1). L'information en provenance de la mémoire est introduite dans le bloc 25 diviseur de même que l'information poids de linge sec P en provenance du bloc 24. Le bloc 25 calcule le quotient V a/P entre le volume d'eau absorbé Va et ce poids P. Ce quotient est introduit dans le bloc comparateur 26 de même que des valeurs types de quotient relatives à différentes natures de linge. Le quotient issu de 25 est comparé à ces différentes valeurs types pour déterminer la nature du linge présent dans la machine. La machine à laver dispose ainsi à son bord d'une information concernant à la fois la nature du linge à laver et le poids de celui-ci.In FIG. 2 indicating by way of example a block diagram of electronic means allowing the implementation of the method on board the machine, block 21 represents the meter with which the volume V of water introduced into the machine is translated into output in an electrical signal proportional to this volume, block 22 a comparator into which the water level signal h from the level sensor is introduced as well as a reference signal R which corresponds to the level of the level PQ of the figure 1 of water absorption. This comparator delivers a signal as soon as the water level h is higher than the reference level. This signal from the comparator is introduced into memory 23 which also receives the signal from the water meter. The memory then records the volume of water introduced into the machine which corresponds to the volume of water absorbed Va by the laundry (abscissa of point Q in FIG. 1). The information from the memory is entered in the divider block 25 as well as the dry laundry weight information P from the block 24. The block 25 calculates the quotient V a / P between the volume of water absorbed V a and this weight P. This quotient is introduced into the comparator block 26 as well as standard quotient values relating to different types of laundry. The quotient from 25 is compared with these different standard values to determine the nature of the laundry present in the machine. The washing machine thus has on board information relating to both the nature of the laundry to be washed and the weight thereof.

La machine utilise cette information pour commander des dis- po-'tifs de choix des cycles de lavage fonction à la fois de la nature du linge à laver et de la quantité de celui-ci présent dans la machine, lesdits dispositifs faisant partie de la machine.The machine uses this information to control devices for choosing the washing cycles depending both on the nature of the laundry to be washed and the quantity of it present in the machine, said devices being part of the machine.

Claims (7)

1. Procédé de détermination de la nature moyenne du matériau constitutif du linge dans une machine à laver le linge, lequel procédé comprend en outre la mesure du poids du linge introduit dans la machine, le relevé du volume (V) et le relevé de la hauteur (h) de l'eau introduite dans la cuve de la machine, caractérisé en ce qu'au moins un desdits relevés est effectué d'une manière continue au cours du remplissage de la cuve, que la hauteur (h) relevée est comparée à au moins une valeur de référence, et que lorsque la hauteur de l'eau dans la cuve commence à dépasser cette valeur de référence, la machine détermine la nature moyenne du matériau constitutif du linge présent dans la cuve en comparant le volume d'eau absorbé par unité de poids de linge à une série de valeurs types de ce volume absorbé correspondant à différentes natures de matériau constitutif de linge.1. A method of determining the average nature of the material of the laundry in a washing machine, which process further comprises measuring the weight of the laundry introduced into the machine, the volume reading (V) and the reading of the height (h) of the water introduced into the tank of the machine, characterized in that at least one of said readings is taken continuously during the filling of the tank, that the height (h) readings is compared at least one reference value, and when the height of the water in the tank begins to exceed this reference value, the machine determines the average nature of the material of the laundry present in the tank by comparing the volume of water absorbed per unit weight of laundry to a series of typical values of this absorbed volume corresponding to different types of material of laundry. 2. Procédé de détermination de la nature moyenne du matériau constitutif du linge selon la revendication 1, caractérisé en ce que le volume d'eau absorbé par unité de poids de linge est comparé à trois valeurs types, lesquelles valeurs types correspondent à trois courbes représentant la hauteur (h) d'eau introduite dans la cuve en fonction du volume (V) de l'eau, lesquelles trois courbes étant, une première courbe correspondant à l'absence de linge dans la machine, une seconde courbe correspondant à la présence de linge en matériau absorbant, et une troisième courbe correspondant à la présence de linge en matériau peu ou pas absorbant.2. Method for determining the average nature of the material of the linen according to claim 1, characterized in that the volume of water absorbed per unit weight of linen is compared with three standard values, which standard values correspond to three curves representing the height (h) of water introduced into the tank as a function of the volume (V) of water, which three curves being, a first curve corresponding to the absence of laundry in the machine, a second curve corresponding to the presence linen in absorbent material, and a third curve corresponding to the presence of linen in little or no absorbent material. 3. Procédé de détermination de la nature moyenne du matériau constitutif du linge selon la revendication 2, caractérisé en ce que ladite valeur de référence correspond au niveau d'un palier de ladite seconde courbe, lequel palier est sensiblement parallèle à l'axe du volume.3. Method for determining the average nature of the material of the linen according to claim 2, characterized in that said reference value corresponds to the level of a level of said second curve, which level is substantially parallel to the axis of the volume . 4.. Procédé de détermination de la nature moyenne du matériau constitutif du linge selon l'une des revendications précédentes, caractérisé en ce que le remplissage de la cuve comporte à son début une séquence de périodes alternées respectivement de mises au repos et en rotation successives du tambour de la machine, laquelle séquence se poursuit jusqu'à la disparition d'une indication pour la hauteur de l'eau d'une valeur moyenne constante au cours du temps.4 .. A method of determining the average nature of the material of the laundry according to one of the preceding claims, characterized in that the filling of the tank comprises at its beginning a sequence of alternating periods respectively of resting and successive rotation from the machine drum, which sequence continues until an indication for the height of the water disappears from a constant average value over time. 5. Machine à laver le linge pour la mise en oeuvre du procédé selon l'une des revendications 1 à 4, pourvue d'un dispositif de mesure du poids du linge introduit dans la machine et de moyens électroniques mémorisant le poids du linge (24), caractérisée en ce que la machine comporte de plus un dispositif de mesure en continu (21) du volume d'eau introduit dans la cuve, et un dispositif de mesure en continu du niveau d'eau, un dispositif (25) pour déterminer le volume d'eau absorbé par unité de poids de linge ayant une première entrée reliée au dispositif de mesure en continu du volume d'eau et une seconde entrée reliée aux moyens électroniques mémorisant le poids du linge, et un dispositif d'identification (26) de la nature moyenne du linge introduit dans la cuve relié à une sortie du dispositif (25).5. Washing machine for carrying out the method according to one of claims 1 to 4, provided with a device for measurement of the weight of the laundry introduced into the machine and of electronic means memorizing the weight of the laundry (24), characterized in that the machine also comprises a continuous measurement device (21) of the volume of water introduced into the tank, and a device for continuous measurement of the water level, a device (25) for determining the volume of water absorbed per unit of weight of laundry having a first input connected to the device for continuously measuring the volume of water and a second input connected to electronic means memorizing the weight of the laundry, and a device for identifying (26) the average nature of the laundry introduced into the tank connected to an outlet of the device (25). 6. Machine à laver le linge selon la revendication 5, laquelle machine comporte une mémoire dite de volume (23) pour mémoriser le volume d'eau introduit dans la machine, caractérisée en ce que la machine comporte aussi un premier bloc comparateur (22), pour comparer le niveau d'eau mesuré à un niveau de référence, et pour générer un signal de validation lorsque le niveau mesuré est supérieur au niveau de référence, lequel signal de validation est appliqué à la mémoire dite de volume, un bloc diviseur (25), ayant une première entrée connectée6. Washing machine according to claim 5, which machine comprises a so-called volume memory (23) for memorizing the volume of water introduced into the machine, characterized in that the machine also comprises a first comparator block (22) , to compare the measured water level with a reference level, and to generate a validation signal when the measured level is higher than the reference level, which validation signal is applied to the so-called volume memory, a divider block ( 25), having a first input connected à la mémoire dite de volume et une seconde entrée connectée aux moyens électroniques mémorisant le poids du linge (24), pour déterminer le quotient entre la valeur du volume d'eau présent dans la cuve lors de la réception du signal de validation, et le poids<du linge, lequel bloc diviseur ayant une sortie reliée à un second bloc comparateur (26), pour comparer le signal de quotient à la sortie du bloc diviseur avec des quotients types de volume d'eau absorbé par unité de poids de linge correspondant à diverses qualités de linge connues.to the so-called volume memory and a second input connected to the electronic means memorizing the weight of the laundry (24), to determine the quotient between the value of the volume of water present in the tank when the validation signal is received, and the weight <of the laundry, which divider block having an output connected to a second comparator block (26), for comparing the quotient signal at the output of the divider block with typical quotients of volume of water absorbed per unit weight of corresponding laundry various qualities of known linen.
EP81200631A 1980-06-13 1981-06-09 Method to determine the average nature of the constitutive material of the laundry introduced into a washing machine, and washing machine to carry out this method Expired EP0042190B1 (en)

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FR8013202A FR2484487A1 (en) 1980-06-13 1980-06-13 METHOD FOR DETERMINING THE AVERAGE NATURE OF THE LAUNDRY INTRODUCED IN A LAUNDRY WASHING MACHINE AND CARRYING OUT SAID METHOD ON THE SAME

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US9243987B2 (en) 2013-05-01 2016-01-26 Whirlpool Corporation Method of determining fabric type of a laundry load in a laundry treating appliance
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US9758913B2 (en) * 2013-06-27 2017-09-12 Haier Us Appliance Solutions, Inc. Washing machine appliance and a method for operating the same
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FR2474547A1 (en) * 1980-01-26 1981-07-31 Miele & Cie METHOD AND DEVICE FOR CONTROLLING THE PROGRAM OF A WASHING MACHINE, WHOSE WATER SUPPLY IS FUNCTION OF ITS LEVEL
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FR2559796A1 (en) * 1984-02-17 1985-08-23 Esswein Sa WASHING MACHINE WITH AUTOMATIC DETERMINATION OF THE TYPE OF LAUNDRY INSERTED IN THIS MACHINE
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EP0483906A1 (en) * 1990-10-29 1992-05-06 Whirlpool Europe B.V. Method and device for determining the type of constituent fabric of a load of clothes to be washed in a washing machine or the like
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EP0709512A1 (en) * 1994-10-29 1996-05-01 Miele &amp; Cie. GmbH &amp; Co. Method for determining the load level depending on the nature and the quantity of the laundry
EP0717139A1 (en) * 1994-12-13 1996-06-19 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Improvement in arrangements provided for determining the type of textiles in the washload of clothes washing machines
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Also Published As

Publication number Publication date
EP0042190B1 (en) 1984-01-25
JPS5729398A (en) 1982-02-17
FR2484487A1 (en) 1981-12-18
DE3162018D1 (en) 1984-03-01
JPS643516B2 (en) 1989-01-20
US4400838A (en) 1983-08-30
FR2484487B1 (en) 1983-08-19

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