EP0042190B1 - Procédé pour la détermination de la nature moyenne du matériau constitutif du linge dans une machine à laver le linge et machine à laver pour la mise en oeuvre dudit procédé - Google Patents

Procédé pour la détermination de la nature moyenne du matériau constitutif du linge dans une machine à laver le linge et machine à laver pour la mise en oeuvre dudit procédé Download PDF

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Publication number
EP0042190B1
EP0042190B1 EP81200631A EP81200631A EP0042190B1 EP 0042190 B1 EP0042190 B1 EP 0042190B1 EP 81200631 A EP81200631 A EP 81200631A EP 81200631 A EP81200631 A EP 81200631A EP 0042190 B1 EP0042190 B1 EP 0042190B1
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EP
European Patent Office
Prior art keywords
laundry
water
machine
volume
weight
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.)
Expired
Application number
EP81200631A
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German (de)
English (en)
French (fr)
Other versions
EP0042190A1 (fr
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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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9243084&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0042190(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Laboratoires dElectronique et de Physique Appliquee, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Laboratoires dElectronique et de Physique Appliquee
Publication of EP0042190A1 publication Critical patent/EP0042190A1/fr
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Publication of EP0042190B1 publication Critical patent/EP0042190B1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • 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 comprises measuring the weight of the laundry introduced into the machine, the volume readings V and the height readings h 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 this 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 laundry is determined electronically in the machine, so that an adequate treatment can be applied for each kind of laundry.
  • 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 readout height h 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 almost dry laundry with a series of values types 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 almost dry laundry with a series of values types of this absorbed volume corresponding to different types of laundry.
  • the water absorption properties by the machine are used in another application with a further object, in particular in DE-A No. 2920492.
  • This application describes a machine control method for washing so-called economical type of laundry.
  • the weight of the laundry introduced into the machine is measured.
  • the tank is filled with water up to a level calculated on the basis of the weight and the type of washing chosen by the user.
  • the capacity of water absorption by the laundry is determined on the basis of the volume introduced and the level which is established.
  • the water levels for washing and rinsing are determined, so as not to waste water.
  • 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.
  • 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 almost dry laundry is compared with three typical values, which 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, these three curves being a first curve A corresponding to the absence of laundry in the machine, a second curve B corresponding to the presence of laundry made of absorbent material, and a third curve C corresponding to the presence of linen made of little or no absorbent material, the nature of the linen being appreciated in the geometric differences with respect to each other of the representative curves in Cartesian coordinates, in each case, variations of the height h of water in the tank as a function of the volume V of water introduced.
  • the fabric is very absorbent, in wool or cotton for example, during the introduction of water, this 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 establish 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, level substantially parallel to the axis of the volume.
  • the advantage of choosing the bearing of the second curve as a reference value resides in the fact that the presence of a bearing indicates the presence of laundry made of absorbent materials in the tub of the washing machine, materials which prevent the level of 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 respectively of successive starts at rest and in rotation of the drum of the machine, a sequence which 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 come 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 water inside the tank oscillates around an average value corresponding to the level .
  • the invention also relates to a washing the linen for the implementation of the method according to the invention, machine which comprises a device for measuring the weight of the almost dry linen introduced into the machine, electronic means memorizing the weight of the linen, a device for continuously measuring the volume of water introduced into the tank, and a device for continuously measuring the water level.
  • This washing machine for implementing the method according to the invention is characterized in that it comprises a device for determining the volume of water absorbed per unit weight of almost dry laundry having a first inlet connected to the measuring device in continuous volume of water and a second input connected to electronic means memorizing the weight of the almost dry laundry, device having an output connected to a device for identifying the average nature of the laundry introduced into the tank.
  • 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.
  • a washing machine comprises a memory, called volume, for memorizing the volume of 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 higher than the reference level, validation signal which 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 almost dry laundry, to determine the quotient between the value of the volume d water present in the tank upon receipt of the validation signal and the weight of the almost dry 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 quotients of volume of water absorbed per unit weight of almost dry laundry corresponding to various known qualities of laundry.
  • 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 fig. 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 opening and stopping periods for the admission of water into the machine, the stopping periods being used to stir the laundry by rotating it 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 curve shown 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 presents, at its beginning, oscillations of the level h of substantially constant mean value corresponding to the laundry stirring period during absorption, this average value being the ordinate of the PQ level, then an increasing part.
  • 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 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 document FR-A No 2484484. , filed 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 document indicated above, 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 the drum.
  • the weight of the linen introduced is measured for example by measuring the change in weight of the machine due to the introduction of the linen into the machine.
  • One means used is, for example, an electrical resistive strain gauge installed between the frame of the machine and the ground on which the machine rests.
  • block 21 represents the counter with which the volume V of water introduced into the machine is translated into an output 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 in FIG. 1 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 the 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.
  • Block 25 calculates the quotient V a / P between the volume of absorbed water Va and this weight P. This quotient is introduced into comparator block 26, as well as typical values of quotient relating to different types of linen. 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, devices which are part of the machine.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP81200631A 1980-06-13 1981-06-09 Procédé pour la détermination de la nature moyenne du matériau constitutif du linge dans une machine à laver le linge et machine à laver pour la mise en oeuvre dudit procédé Expired EP0042190B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8013202A FR2484487A1 (fr) 1980-06-13 1980-06-13 Procede pour la determination de la nature moyenne du linge introduit dans une machine a laver le linge et mise en oeuvre dudit procede a bord de ladite machine
FR8013202 1980-06-13

Publications (2)

Publication Number Publication Date
EP0042190A1 EP0042190A1 (fr) 1981-12-23
EP0042190B1 true EP0042190B1 (fr) 1984-01-25

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EP81200631A Expired EP0042190B1 (fr) 1980-06-13 1981-06-09 Procédé pour la détermination de la nature moyenne du matériau constitutif du linge dans une machine à laver le linge et machine à laver pour la mise en oeuvre dudit procédé

Country Status (5)

Country Link
US (1) US4400838A (enrdf_load_stackoverflow)
EP (1) EP0042190B1 (enrdf_load_stackoverflow)
JP (1) JPS5729398A (enrdf_load_stackoverflow)
DE (1) DE3162018D1 (enrdf_load_stackoverflow)
FR (1) FR2484487A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
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DE3909021A1 (de) * 1989-03-18 1990-09-20 Miele & Cie Verfahren zur steuerung des programms in einer waeschebehandlungsmaschine

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DE3002786C2 (de) * 1980-01-26 1982-08-26 Miele & Cie GmbH & Co, 4830 Gütersloh Verfahren und Anordnung zur Programmsteuerung einer Waschmaschine
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Also Published As

Publication number Publication date
US4400838A (en) 1983-08-30
JPS643516B2 (enrdf_load_stackoverflow) 1989-01-20
JPS5729398A (en) 1982-02-17
DE3162018D1 (en) 1984-03-01
FR2484487A1 (fr) 1981-12-18
EP0042190A1 (fr) 1981-12-23
FR2484487B1 (enrdf_load_stackoverflow) 1983-08-19

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