EP0686721B1 - Verfahren zum Optimieren der Wasserausnutzung in Waschmaschinen - Google Patents

Verfahren zum Optimieren der Wasserausnutzung in Waschmaschinen Download PDF

Info

Publication number
EP0686721B1
EP0686721B1 EP94108840A EP94108840A EP0686721B1 EP 0686721 B1 EP0686721 B1 EP 0686721B1 EP 94108840 A EP94108840 A EP 94108840A EP 94108840 A EP94108840 A EP 94108840A EP 0686721 B1 EP0686721 B1 EP 0686721B1
Authority
EP
European Patent Office
Prior art keywords
water
stage
load
tub
conductivity
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 - Lifetime
Application number
EP94108840A
Other languages
English (en)
French (fr)
Other versions
EP0686721A1 (de
Inventor
Raffaele C/O Whirlpool Italia S.R.L. Paganini
Daniele C/O Whirlpool Italia S.R.L. Turetta
Claudio C/O Whirlpool Italia S.R.L. Civanelli
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.)
Whirlpool Europe BV
Original Assignee
Whirlpool Europe BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Whirlpool Europe BV filed Critical Whirlpool Europe BV
Priority to DE69424409T priority Critical patent/DE69424409T2/de
Priority to EP94108840A priority patent/EP0686721B1/de
Publication of EP0686721A1 publication Critical patent/EP0686721A1/de
Application granted granted Critical
Publication of EP0686721B1 publication Critical patent/EP0686721B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • D06F2103/16—Washing liquid temperature
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/20—Washing liquid condition, e.g. turbidity
    • D06F2103/22—Content of detergent or additives
    • 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
    • D06F2103/44—Current or voltage
    • D06F2103/46—Current or voltage of the motor driving the drum
    • 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

  • This invention relates to a method for optimizing water consumption by a washing machine, a washing-drying machine or the like in washing and rinsing a load or clothes placed in its usual drum, in accordance with the introduction to the main claim.
  • the invention also relates to a device for implementing the aforesaid method.
  • EP-A-0 441984 suggests, in a washing machine, a control unit using the fuzzy logic to evaluate the clothes load and the water quantity in the different cycles using water conductivity measuring means.
  • Methods and devices are known for evaluating the water quantity to be used in a washing machine during clothes washing and rinsing.
  • devices are known which measure the water conductivity on termination of the wash stage or of a rinse stage in order to determine the water quantity to he used for the next stage in the treatment of the load in said machine.
  • these known devices and methods operate in accordance with logics comprising the definition of precise predetermined water levels based on the measured water conductivity. These levels can either be totally insufficient for complete detergent removal or be considerably higher than required for this removal.
  • Methods and devices are also known for evaluating the weight of the load placed in a washing machine or the like in order to define a suitable water quantity (which is hence fixed) for use in each machine operation stage.
  • This water quantity is not changed in any way after the wash stage, even if after the first rinse stage the clothes retain only a minimum detergent quantity, which could be removed by a water volume much smaller than that set at the start of operation of the washing machine.
  • Known methods and devices therefore do not completely attain the object of properly limiting the water quantity user, by the appliance during the treatment of the load, neither do they provide a metered water utilization, at least for each rinse stage, based on the detergent quantity still present in the load after the preceding treatment stage (such as a rinse stage).
  • An object of the present invention is to provide a method and corresponding device which overcome the drawbacks of analogous known devices and methods.
  • a particular object of the invention is to provide a method and corresponding device which allow optimized water utilization in a washing machine or the like and in particular, during each rinse stage, on the basis of the detergent used for washing and remaining associated with the load after a preceding rinse stage.
  • a further object is to provide a method and corresponding device able to achieve high rinsing efficiency, ie able to free the clothes from the detergent for any fed quantity of this latter, even if the user has introduced into the usual drawer a detergent quantity greater than that required for washing the load being treated.
  • a further object is to provide a method and device able to achieve optimum washing and rinsing of the load even if its weight has been erroneously evaluated during the initial stage of its treatment.
  • a further object is to provide a method enabling the rinse stage to be shortened, with consequent reduction in the appliance operating costs.
  • At least the evaluation of the water quantity to be used in the rinse stage following a first wash stage is effected by the known fuzzy logic procedure.
  • This latter has been known for some time and is used in various technical sectors.
  • US4910684 describes a method for controlling a rotary kiln during its start-up.
  • This text amply describes the use of fuzzy logic.
  • This latter uses rules defined by "linguistic operations" relative to the control actions to be taken on the basis of a given process condition, ie "if” a certain condition arises, "then” a certain control action is taken.
  • the key elements in the control rules are terms such as “medium reduction”, “open slightly”, “high”, “somewhat low” and the like.
  • each of these terms is represented by a single fuzzy function which for a given process condition is used to establish a value within the range (0,1).
  • the logic value of a condition which in binary logic is usually restricted to "true” or “false” (0 or 1), can have any value within the range (0,1) in fuzzy logic, the logic value being a measure of the fulfilment of the condition for a given process state.
  • a washing machine (or the like) comprises a cabinet 1, and a drum 2 rotating within a tub 3 into the top of which there opens a pipe 4 (from a usual detergent distribution drawer 5) and into the bottom of which, in the machine of Figures 2 and 3, there opens a pipe 6.
  • This latter originates from a pipe 7 to which it is connected via a three-way solenoid valve 8, this pipe terminating in the drawer 5 and being connected, upstream of the solenoid valve 8, to a wash water feed pipe 10 and to a prewash water feed pipe 11.
  • Solenoid valves 12 and 13 respectively are contained in these latter (see Figure 4).
  • a conductivity sensor 14 for example a conductivity cell
  • a further sensor 14A being positioned in the pipe 7.
  • Each sensor 14, 14A is connected to an operating and control unit 15 for the washing machine.
  • This unit preferably of microprocessor type, operates in accordance with fuzzy logic and is connected to a known current sensor 16 associated with the usual electric motor of the appliance and used to measure the current absorbed by said motor at least before the wash stage, to a pressure sensor 17 used to provide the unit 15 with a continuous indication of the water level in the tub 3, and to a temperature sensor 18 (for example a negative temperature coefficient or NTC sensor) to enable the unit 15 to measure the temperature of the water in the tub.
  • a temperature sensor 18 for example a negative temperature coefficient or NTC sensor
  • the sensor 17 can be replaced by a flowmeter 18A to enable the tub 3 to be filled to a predetermined level.
  • the unit 15 consequently continuously receives the signals from said sensors, and in accordance with fuzzy logic controls the solenoid valves 8, 12, 13, the possible flowmeter 18A, a usual heating element 19 positioned in the tub 3, a usual discharge pump 20, and an electric motor control member 21 (of known type).
  • the unit 15 also dialogues with a usual interface 22 (such as a keypad, one or two knobs and a display) positioned on a face of the cabinet 1 (not shown) by which the user selects in known manner the wash program which the machine is to execute and notes the state of execution of this program.
  • Figure 1 also shows a usual power supply 23 from the electric mains 24.
  • the block 30 represents the start of the procedure of said method.
  • the unit 15 On pressing the start button, the unit 15 acts on the motor control member 21 to operate the appliance electric motor.
  • the motor By means of this action the motor (see Figure 6) firstly gradually increases its rpm and then undergoes a steep rise (ramp) by considerably increasing its rpm within a very short time, followed by its stoppage. This corresponds to the motor current absorption shown in Figure 7, which shows a current peak value (IMAX) and a mean reference value (IREF) calculated in any known manner.
  • IMAX current peak value
  • ITF mean reference value
  • the values of the grade value of the calculated value DI are divided within the cartesian plane into areas in accordance with the known rules of this logic: the area A1 corresponds to a low grade value (L1), the area A2 corresponds to a medium degree (M) and the area A3 corresponds to a high degree (H).
  • L1 low grade value
  • M medium degree
  • H high degree
  • the unit 15 determines substantially the output values weighted on the basis of said grade values, and in accordance with the known mathematical formula: calculates the resultant value corresponding to the water quantity to be used in the next operating stage of the washing machine.
  • the formula in known manner:
  • the resultant output hence corresponding to the centre of gravity of the individual outputs weighted in accordance with the known rules of fuzzy logic, is calculated by the unit 15. All this is achieved in the blocks 31 (current measurement) and 32 (fuzzy logic routine execution) in which the weight of the load placed in the drum 2 is evaluated ( Figure 5).
  • the unit 15 uses known calculation algorithms to define in proportion the water quantity (in litres or in terms of levels) necessary for effectively washing said load and for effecting a first rinse stage (or simply a first rinse).
  • the blocks 31, 32 and 33 define a stage 34 in which the weight of the load and of the water required for its washing and for the first rinse are determined.
  • the stage 34 can be used for determining the water quantity to be used for only the first rinse stage, the water quantity to be used for the wash being unequivocally determined by the attainment of a suitable water level in the tub 3. This level is attained and checked (by the unit 15) via the flowmeter 18A, if provided.
  • the unit 15 After the stage corresponding to the block 33, the unit 15 starts the washing of the load (block 35). During this latter the unit monitors the water level by means of the pressure sensor 17 and its temperature by means of the sensor 18. The stage represented by the block 35 is effected by usual procedures, and on their termination (evaluated in the stage represented by the block 36) the pump 20 is activated to discharge the water from the tub 3.
  • the drum 2 is made to rotate (in known manner) at a spinning speed such as to expel water from the load.
  • a further stage 34 can then be executed to improve the evaluation of the load weight before executing the rinse stage so as to optimize the value representing the water quantity to be used for implementing the first rinse stage.
  • This further stage 34 following the wash could also totally replace the analogous stage preceding the wash.
  • a first rinse stage starts, effected by introducing into the tub a water quantity evaluated in the stage corresponding to the block 33 (or the equivalent stage executed after the wash).
  • the unit 15 evaluates the relative conductivity of the water by comparing (by difference) the conductivity (reference conductivity, Cr) of the water introduced into the tub 3 and the conductivity (Cd) evaluated during the rinse stage. On the basis of this evaluation (block 39) and the water quantity used in this first rinse stage, the unit 15 operating (block 40) by fuzzy logic determines (block 41) the new water level to be used in the subsequent second rinse stage (block 42) after the water used in the preceding rinse stage has been discharged.
  • a suitable time period typically 180 seconds
  • the block 42 is followed by the blocks 43, 44, 45 and 46 which execute stages identical to and corresponding to the stages 38, 39, 40 and 41 respectively.
  • the evaluation of the water conductivity during stage 44 is done by comparing the conductivity (Cr) of the water introduced into the tub 3 (measured continuously by the sensor 14A) with that of the water present in the tub 3 after the second rinse.
  • This latter value is different from the corresponding value used in block 39 because the first rinse has already removed a large part of the detergent (responsible for the conductivity variation of the water coming into contact with the load after its washing, compared with the reference value Cr) from the clothes in the drum 2.
  • the conductivity of the water (or rather of the aqueous solution) present in the tub 3 is a value representative of the quantity of detergent dissolved in the water or of how much detergent remains associated with the clothes contained in the drum after their wash or after the preceding rinse stage. This value generally decreases with the successive rinses, but how it varies cannot be predefined with certainty. This value in fact depends on various variables such as the type of clothes fabric and the quantity and type of detergent introduced into the drawer 5.
  • the unit 15 executes for example stage 51 of the method shown in Figure 11.
  • the unit 15 acts on the solenoid valve 8 to close access to the drawer 5 by the water originating from at least one of the pipes 10, 11, and to feed it into the pipe 6 (this being shown by the block 52 of Figure 11). Following this, said unit operates at least one solenoid valve 12 or 13 (to feed water into the tub) and evaluates the water level in the tub 3 without operating the motor via the member 21. When a predetermined minimum level of water sufficient to enable its conductivity to be measured by the sensor 14 has been reached in said tub, the unit 15 returns the valve 8 to the position closing the pipe 6 to the water and enabling it to flow into the drawer 5.
  • This unit determines the value of the conductivity measured by the sensor 14 (block 54) and takes it as the reference value Cr.
  • the successive evaluations (blocks 39 and 44) of the difference between the measured or instantaneous value (Cd) and the reference value (C r ) can be carried out according to any known method.
  • FIG. 12 A further example of evaluating the water conductivity and its consequences for defining, in accordance with fuzzy logic, the water quantity to be used in each rinse subsequent to the first is given in Figures 12 to 14, in which parts corresponding to those of the already described figures are indicated by the same reference numerals.
  • the washing machine of Figure 12 is similar to that of Figure 1A, but is without the sensor 14A.
  • each rinse comprises a first phase "i” in which water is fed into the tub 3, a phase “a” in which the load is agitated (possibly comprising the phase "i") and a phase “ds” of predetermined duration during which this load is spun and the water discharged.
  • the conductivity undergoes considerable swings related to the "fall” of the water containing detergent (taken from the load) in the tub.
  • the load agitation phase commences (phase "a” in Figure 14) there is a first evaluation of the water conductivity measurement (block 13B of Figure 13).
  • the conductivity measured by the sensor 14 increases in accordance with an exponential law (curve X).
  • curve X an exponential law
  • the unit 15 analyzes the angle gamma ( ⁇ ) which the tangent Z to the curve X forms with a straight line P parallel to the conductivity axis passing through that point on the time axis at the commencement of the period subsequent to the instability phase "i", ie at the start of the period T1 (ie when the unit 15 detects a continuously increasing conductivity).
  • the aforesaid evaluation is executed in accordance with the flow diagram of Figure 13 and as indicated by the block 37A (or 42A) of Figure 12A.
  • This value is representative of the quantity of detergent present in the load before the start of the relative rinse stage and is used by the unit 15 to determine in accordance with fuzzy logic (and by procedures analogous to those described heretofore in relation to Figures 5A, B, C, D) the water quantity to be used for the next rinse.
  • the angle gamma is evaluated during each rinse. As can be seen from the aforesaid figures, the angle gamma (indicated by the subscripts 1, 2 and 3 depending on the rinse) tends to become increasingly larger (ie the angle alpha becomes increasingly smaller), this being representative of a decrease in the quantity of detergent removed from the load contained in the drum 2. Rinsing is halted on reaching the aforesaid situation leading to the block 13L of Figure 14 (this condition usually being reached at the third rinse). Alternatively, rinsing is halted after a predetermined time.
  • the value of the angle gamma (indirectly obtained from the angle alpha) is used by the unit 15 to determine by fuzzy logic the quantity of water to introduce into the tub for the operating stage following the preceding one in which said angle was calculated. This is done by taking into consideration the water quantity used in the preceding spin calculated by the rules of fuzzy logic (analogously to that shown in Figures 5A, B, C and D).
  • this determination is as accurate as possible and enables water utilization to be optimized during the entire wash and rinse cycle of the appliance. Said logic results in substantially continuous definition of the water quantity to be used in the washing machine for removing the detergent from the load without the need for approximations (generally in excess) which usually lead to a considerable wastage of water.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Claims (14)

  1. Verfahren zur Optimierung der Wasserausnutzung einer Waschmaschine (1), einer Wasch-Trocknungsmaschine oder dergleichen während ihrer Benutzung, wobei diese Maschine eine Ladung oder Wäsche behandelt, die in eine in einer Wanne (3) rotierende und durch einen Elektromotor betriebene Trommel (2) eingelegt ist, diese Behandlung aus einem Waschschritt und einer Vielzahl von aufeinanderfolgenden Spülschritten besteht, das Gewicht der Ladung in der Trommel (2) und die Leitfähigkeit des Waschwassers und/oder des Wassers für jeden Spülschritt ausgewertet wird, um mindestens eine Festlegung der beim Spülen zu verwendenden Wassermenge zu erhalten, und diese Auswertung nach der Fuzzy-Logik erfolgt,
    dadurch gekennzeichnet,
    dass die Bestimmung der Wasserleitfähigkeit, die für die Menge des von der Wäsche absorbierten Reinigungsmittels repräsentativ ist, während jedes Spülschritts erfolgt, wobei diese Auswertung eine genaue Bestimmung der in die Maschinenwanne (3) einzulassenden Wassermenge für die Ausführung jedes der aufeinanderfolgenden Spülschritte erlaubt, damit diese Reinigungsmittelmenge auf einen Wert verringert werden kann, der geringer als ein bestimmter Minimalwert ist, und wobei die in die Wanne (3) einzulassende Wassermenge genau nach der Reinigungsmittelmenge abgemessen ist, die nach der Fuzzy-Logik berechnet und in der Ladung nach einem vorhergehenden Behandlungsschritt verblieben ist.
  2. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet,
    dass ein Wert, der der Wassermenge für ein vorhergehendes Spülen (37, 42) entspricht, in Kombination mit einem Wert, der der beim vorhergehenden Spülen verwendeten Reinigungsmittelmenge entspricht, nach der Fuzzy-Logik zur Bestimmung derjenigen Wassermenge dient, die in die Wanne (3) zur Ausführung des nächsten Spülschritts (42, 47) einzulassen ist.
  3. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet,
    dass die Fuzzy-Logikauswertung der mindestens für den ersten Spülschritt (37) auszunutzenden Wassermenge auf der Basis des nach der Fuzzy-Logik ausgewerteten Gewichts der in die Drehtrommel (2) eingeführten Ladung erfolgt.
  4. Verfahren nach Anspruch 3,
    dadurch gekennzeichnet,
    dass die Fuzzy-Logikauswertung des Ladungsgewichts auch zur Bestimmung derjenigen Wassermenge verwendet wird, die zur Ausführung des Waschschritts zu verwenden ist.
  5. Verfahren nach Anspruch 3 oder 4,
    dadurch gekennzeichnet,
    dass nach der Fuzzy-Logik ein Leistungsmerkmal des Elektromotors (31) bestimmt wird und
    dass auf der Basis dieses Leistungsmerkmals das Gewicht der in die Trommel (2) eingelegten Ladung bestimmt wird, wobei der Wert dieses Leistungsmerkmals von dieser Logik dazu benutzt wird, die in die Wanne (3) zum Waschen der Ladung (35) und/oder für den ersten Spülschritt (37) einzulassende Wassermenge aufeinanderfolgend festzulegen.
  6. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet,
    dass ein weiterer Schritt (34) vorgesehen ist, der dem Waschen der Ladung (35) folgt, jedoch vor dem ersten Spülschritt (37) liegt, und der nach der Fuzzy-Logik das Gewicht der in die Trommel eingelegten Ladung auswertet.
  7. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet,
    dass vor dem Waschen (35) und nach dem Schritt (34) zur Auswertung des Ladungsgewichts ein Schritt (51) ausgeführt wird, bei dem die Leitfähigkeit des in die Wanne (3) eingelassenen Wassers ausgewertet wird, um als Bezugswert zu dienen.
  8. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet,
    dass die Fuzzy-Logikauswertung der im Wasser in der Wanne (3) gelösten Reinigungsmittelmenge dadurch bewirkt wird, dass die Wasserleitfähigkeit mindestens beim Start jedes Spülschritts (37, 42) gemessen wird.
  9. Vorrichtung zur Durchführung des Verfahrens nach Anspruchs 1 in einer Waschmaschine mit einer Steuereinheit (15) für das Waschprogramm der Maschine und einem Elektromotor zum Drehen einer Trommel in der Wanne, der Waschwasser zugeführt wird, wobei die Steuereinheit (15) mindestens mit Mitteln (14) zur Messung der Leitfähigkeit des Wassers verbunden ist, das bestimmt mit der in der Drehtrommel (2) vorhandenen Wäsche in Berührung kommt,
    dadurch gekennzeinet,
    dass die Steuereinheit (15) nach den Regeln der Fuzzy-Logik arbeitet, um diejenige Wassermenge, die in den Wasch- und/oder Spülschritten nötig ist, auf der Basis der gemessenen Leitfähigkeit auszuwerten.
  10. Vorrichtung nach Anspruch 9,
    dadurch gekennzeichnet,
    dass weitere Mittel (14A) zur Messung der Leitfähigkeit des Wassers, das in die Wanne (3) eingelassen worden, aber nicht mit der Wäsche in Berührung gekommen ist, vorgesehen sind, wobei diese Mittel mit der nach der Fuzzy-Logik arbeitenden Steuereinheit (15) verbunden sind.
  11. Vorrichtung nach Anspruch 9,
    dadurch gekennzeichnet,
    dass Mittel (16) zur Messung eines Leistungsparameters des Elektromotors vorgesehen und mit der nach den Regeln der Fuzzy-Logik arbeitenden Steuereinheit verbunden sind und
    dass diese Mittel (16) der Einheit ermöglichen, das Gewicht der in die Drehtrommel (2) eingelegten Ladung auszuwerten.
  12. Vorrichtung nach Anspruch 9,
    dadurch gekennzeichnet,
    dass die Mittel (14) zur Messung der Leitfähigkeit des bestimmt mit der Ladung in der Drehtrommel (2) in Berührung kommenden Wassers in der Wanne (3) in der Nähe des Bodens der Wanne angeordnet sind.
  13. Vorrichtung nach Anspruch 10,
    dadurch gekennzeichnet,
    dass die weiteren Leitfähigkeitsmeßmittel (14A) in einer Leitung (7) zur Zuführung von Wasser zu einem üblichen Reinigungsmitteleinschub (5) angeordnet sind.
  14. Vorrichtung nach Anspruch 10,
    dadurch gekennzeichnet,
    dass eine Leitung (6) vorgesehen ist, die die Wasser zum Reinigungsmitteleinschub zuführende Leitung (7) mit dem Boden der Wanne (3) verbindet,
    dass am Schnittpunkt dieser Leitungen ein gesteuertes Ventilglied vorgesehen ist, das derart ausgebildet ist,
    dass es das in die Maschine eingelassene Wasser anfangs zum Boden der Wanne (3) und dann zum Einschub (5) hin lenkt, und
    dass in Verbindung mit dem Wannenboden Mittel zur Messung der Leitfähigkeit des in die Maschine eingelassenen Wassers und dann der Leitfähigkeit desjenigen Wassers angeordnet sind, das mit der das Reinigungsmittel enthaltenden Ladung in Berührung gekommen ist.
EP94108840A 1994-06-09 1994-06-09 Verfahren zum Optimieren der Wasserausnutzung in Waschmaschinen Expired - Lifetime EP0686721B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE69424409T DE69424409T2 (de) 1994-06-09 1994-06-09 Verfahren zum Optimieren der Wasserausnutzung in Waschmaschinen
EP94108840A EP0686721B1 (de) 1994-06-09 1994-06-09 Verfahren zum Optimieren der Wasserausnutzung in Waschmaschinen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94108840A EP0686721B1 (de) 1994-06-09 1994-06-09 Verfahren zum Optimieren der Wasserausnutzung in Waschmaschinen

Publications (2)

Publication Number Publication Date
EP0686721A1 EP0686721A1 (de) 1995-12-13
EP0686721B1 true EP0686721B1 (de) 2000-05-10

Family

ID=8216002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94108840A Expired - Lifetime EP0686721B1 (de) 1994-06-09 1994-06-09 Verfahren zum Optimieren der Wasserausnutzung in Waschmaschinen

Country Status (2)

Country Link
EP (1) EP0686721B1 (de)
DE (1) DE69424409T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2243416A1 (de) 2009-04-24 2010-10-27 Electrolux Home Products Corporation N.V. Verfahren zum Betreiben eines Geschirrspülers

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2789568B1 (fr) * 1999-02-16 2001-05-04 Esswein Sa Procede d'optimisation du cycle de fonctionnement d'un appareil electromenager lavant et appareil utilisant ce procede
ES2177370B1 (es) * 1999-10-14 2004-08-16 Atyc Technological S.L. Aparato para tratamiento en humedo de materias textiles.
DE602007001695D1 (de) 2007-11-07 2009-09-03 Electrolux Home Prod Corp Spülmaschine mit Leitfähigkeitsmessung
ITMI20111323A1 (it) * 2011-07-15 2013-01-16 Comenda Ali S P A Stazione di risciacquo perfezionata per macchine lavastoviglie a tunnel, e metodo di comando di tale stazione di risciacquo
CN110846851A (zh) * 2018-07-27 2020-02-28 青岛海尔洗衣机有限公司 一种洗衣机的控制方法及洗衣机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1398580A (fr) * 1964-06-13 1965-05-07 Philips Nv Procédé pour régler automatiquement la quantité d'eau de rinçage dans des machines à laver fonctionnant suivant un programme pré-établi
DE2917859A1 (de) * 1979-05-03 1980-11-13 Licentia Gmbh Verfahren zum ueberwachen und steuern des programmes, insbesondere des wasserzulaufs und/oder der reinigungs- bzw. spuelmittelzugabe bei automatischen wasch- und geschirrspuelmaschinen
FR2485576A1 (fr) * 1980-06-24 1981-12-31 Labo Electronique Physique Procede pour l'adaptation du temps de lavage et de la quantite d'eau de rincage a la charge de linge dans une machine a laver et mise en oeuvre du procede
EP0441984B1 (de) * 1989-09-07 1998-03-18 Matsushita Electric Industrial Co., Ltd. Waschmaschine
JP3212103B2 (ja) * 1991-03-29 2001-09-25 株式会社日立製作所 洗濯機の運転表示装置
JPH0671083A (ja) * 1991-08-05 1994-03-15 Matsushita Electric Ind Co Ltd 洗濯機の制御装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2243416A1 (de) 2009-04-24 2010-10-27 Electrolux Home Products Corporation N.V. Verfahren zum Betreiben eines Geschirrspülers
EP2508113A1 (de) 2009-04-24 2012-10-10 Electrolux Home Products Corporation N.V. Verfahren zum Betreiben eines Geschirrspülers
US8778090B2 (en) 2009-04-24 2014-07-15 Electrolux Home Products Corporation N.V. Method for operating a dishwasher

Also Published As

Publication number Publication date
DE69424409D1 (de) 2000-06-15
DE69424409T2 (de) 2000-11-02
EP0686721A1 (de) 1995-12-13

Similar Documents

Publication Publication Date Title
US5330580A (en) Dishwasher incorporating a closed loop system for controlling machine load
US5408716A (en) Fluid-handling machine incorporating a closed loop system for controlling liquid load
KR101073505B1 (ko) 세탁기 및 그 수위제어방법
CN103485122B (zh) 洗衣机及其参数的调节方法
US4697293A (en) Pressure sensing automatic water level control
JP4047942B2 (ja) 洗濯物の生地の種類を自動判断する洗濯機
EP1063341A2 (de) Prgrammsteuerung für eine automatische Waschmaschine mit Vorbehandlung durch Spray
US11028522B2 (en) Method for controlling the intake of washing liquid in a laundry washing machine, and laundry washing machine actuating that method
AU2006225475A1 (en) Method for washing of washer
KR20050027119A (ko) 드럼 세탁기의 습윤 세탁을 가속하기 위한 공정
KR960014706B1 (ko) 세탁기
EP0686721B1 (de) Verfahren zum Optimieren der Wasserausnutzung in Waschmaschinen
CN111005190B (zh) 进水控制方法、装置、衣物处理装置以及介质
US20050044641A1 (en) Washer and method of determining load weight for same
KR100205411B1 (ko) 전자동 세탁기의 포량 감지방법
CN117364409A (zh) 一种洗衣机的控制方法、装置、洗衣机和存储介质
KR101375710B1 (ko) 세탁기 및 그 헹굼 제어방법
KR100323691B1 (ko) 드럼세탁기의포량감지방법
US20230392314A1 (en) Washing machine appliance load size detection using deceleration time
KR101447151B1 (ko) 세탁기 및 그 제어방법
JP3026739B2 (ja) 洗濯機
ITMI940662A1 (it) Metodo per ottimizzare l'impiego d'acqua in una macchina lavabianchea, lavasciuga o similare durante l'impiego di quest'ultima
JPH0810487A (ja) 全自動洗濯機
KR0163518B1 (ko) 세탁기의 수위결정방법
JPH05115672A (ja) ドラム式洗濯機

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19960601

17Q First examination report despatched

Effective date: 19970618

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 69424409

Country of ref document: DE

Date of ref document: 20000615

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20130605

Year of fee payment: 20

Ref country code: DE

Payment date: 20130605

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20130624

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69424409

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20140608

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20140608

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20140611