EP2935676B1 - Procédé de contrôle de l'évacuation d'un liquide de lavage dans une machine à laver le linge, et machine à laver le linge associée - Google Patents

Procédé de contrôle de l'évacuation d'un liquide de lavage dans une machine à laver le linge, et machine à laver le linge associée Download PDF

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Publication number
EP2935676B1
EP2935676B1 EP13831871.2A EP13831871A EP2935676B1 EP 2935676 B1 EP2935676 B1 EP 2935676B1 EP 13831871 A EP13831871 A EP 13831871A EP 2935676 B1 EP2935676 B1 EP 2935676B1
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EP
European Patent Office
Prior art keywords
drain
draining
flow
wash liquid
stage
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.)
Not-in-force
Application number
EP13831871.2A
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German (de)
English (en)
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EP2935676A1 (fr
Inventor
Nicola Colucci
Alessio Zimar
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 EMEA SpA
Original Assignee
Indesit Co SpA
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Filing date
Publication date
Priority claimed from IT001139A external-priority patent/ITTO20121139A1/it
Priority claimed from IT001140A external-priority patent/ITTO20121140A1/it
Application filed by Indesit Co SpA filed Critical Indesit Co SpA
Publication of EP2935676A1 publication Critical patent/EP2935676A1/fr
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Publication of EP2935676B1 publication Critical patent/EP2935676B1/fr
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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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/42—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of draining
    • 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
    • D06F2103/14—Supply, recirculation or draining of washing liquid
    • 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
    • D06F2105/08—Draining of washing liquids
    • 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
    • D06F2105/58—Indications or alarms to the control system or to the user
    • D06F2105/60—Audible signals
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/087—Water level measuring or regulating devices

Definitions

  • the present invention relates to the field of laundry washing machines.
  • the present invention relates to a method for controlling the wash liquid drain stage in a laundry washing machine, preferably comprising a linear pressure switch.
  • wash liquid In known laundry washing machines, water and detergent, i.e. wash liquid, must be supplied into the wash tub during the various laundry wash stages. Typically, this water is taken from the domestic water mains, and the intake water flow is controlled by an electrovalve.
  • the water intake stage is called "supply stage”.
  • drain stage This wash liquid outflow stage is called “drain stage”.
  • Washing machines which measure the water flow entering the tub by detecting, through a linear pressure switch, the changes in the level of the wash liquid in the tub.
  • a washing machine is described in patent application EP2413106A1 by the present Applicant.
  • washing machines which control the execution of the spin and rotation stages according to the reading of the level of the wash liquid in the tub, still obtained by means of a linear pressure switch.
  • a washing machine is described in patent application WO2011077361A1 by the present Applicant.
  • drain stages are not controlled in an optimal manner by the laundry washing machines known in the art.
  • These drain stages during which the drain pump is operated in order to remove the wash liquid from the tub, are in fact very delicate, since they might lead to problems which may range from the obstruction of domestic drain pipes external to the washing machine to a faulty operation of the washing machine's drain pump.
  • the drain pump can be adversely affected by the presence of excessive foam or foreign or residual bodies, such as buttons, pins or lint, which might partially or totally obstruct the draining means.
  • wash liquid might spill outside the washing machine, thus creating much discomfort for the user.
  • Document AU 2072244222 A1 relates to a washing machine with a bowl and a pump adapted to pump water from the bowl.
  • a pump actuator is disposed in the housing of the pump for transferring water to the outlet in the housing and a recirculation conduit- THe conduit provides fluid communication between the exterior of the housing and the outlet to substantially equalize water pressure.
  • a general idea at the basis of the present invention is to provide a method for controlling the draining of wash liquid in a laundry washing machine, which comprises a tub, draining means for draining wash liquid from the tub, a drum adapted to contain laundry to be washed, and motor means for rotating the drum.
  • the following is carried out: starting a first drain stage, wherein the draining means are activated; measuring a flow of wash liquid drained by the draining means; verifying that said flow is higher than a predetermined alarm flow value and lower than a predetermined nominal flow value; starting a second drain stage, wherein the draining means are activated cyclically to carry out up to a predetermined number of drain operations, while said flow remains higher than said alarm flow value and lower than said nominal flow value, and there is said wash liquid to be drained.
  • This solution allows to overcome the drawbacks of the prior art; in fact, it allows to effectively deal with situations in which the liquid is not drained correctly, thereby preventing further problems from arising in the drain system.
  • this solution prevents the onset of complications in the washing machine by providing for a noncontinuous drain operation, during which the draining means have less probability of suffering damage.
  • this solution allows to cope with drain problems involving components external to the washing machine, such as, for example, clogged domestic drain pipes: this, in fact, gives domestic drain systems more opportunities to perform the drain operation, without any forcing that might cause liquid spillage.
  • the method preferably provides, after the predetermined number of drain operations have been carried out, for activating the motor means in order to carry out at least one spin stage.
  • the spin stage comprises a rotation of the drum at a revolution speed comprised between 200 and 280 revolutions per minute, and the rotation means are activated in such a way as to reach the revolution speed, starting from a standstill, in at least 10 seconds, preferably according to an increasing speed ramp.
  • a further general idea at the basis of the present invention is to provide a method for controlling the draining of wash liquid in a laundry washing machine comprising a tub and draining means for draining wash liquid from the tub; according to the method, the following is carried out: starting a first drain stage by activating the draining means; measuring a flow of wash liquid drained by the draining means; verifying that the flow is lower than a predetermined alarm flow value; starting a second drain stage, wherein the draining means are activated cyclically to carry out a predetermined number of drain operations, while the flow remains lower than the alarm flow value and there is wash liquid to be drained.
  • this solution allows to overcome the drawbacks of the prior art; in fact, it allows to effectively deal with situations in which the liquid is not drained correctly, thereby preventing further problems from arising in the drain system.
  • this solution prevents the onset of complications in the washing machine by providing for a noncontinuous drain operation, during which the draining means have less probability of suffering damage.
  • this solution allows to cope with drain problems involving components external to the washing machine, such as, for example, clogged domestic drain pipes: this, in fact, gives domestic drain systems more opportunities to perform the drain operation, without any forcing that might cause liquid spillage.
  • the method can be implemented in a commercial laundry washing machine, which will need no additional sensors, since the method will use elements typically already present in the machine, although controlled by an improved control logic.
  • the production costs of the washing machine and of the devices associated therewith will not increase.
  • FIG 1 diagrammatically shows one example of embodiment of a washing machine 1 according to the present invention.
  • washing machine refers herein to any machine capable of performing at least one wash treatment on textile items, e.g. washing and/or washing/drying machines.
  • the washing machine 1 comprises a wash tub 2 in which there is a drum 3 adapted to contain laundry to be washed.
  • the drum 3 is rotated about the axis 4 by the torque transmitted by an electric motor (not shown).
  • the wash liquid typically comprises water and a mixture of detergents; the water intake is controlled by an electrovalve 5 that lets in water coming from the domestic water mains; this water is typically mixed with a detergent inside a hopper 6 before entering into the tub 2. Since said water represents the prevailing fraction of the wash liquid, in the present description the generic term "water” will be used to indicate both the liquid taken in from the outside through the domestic water mains and the wash liquid contained in the tub, mainly consisting of water.
  • a drain stage is carried out wherein the water is carried by the drain duct 7 to the drain pump 8 and is then expelled from the washing machine 1.
  • the wash liquid stays in the lower portion 2b of the tub 2, typically under the level 2c of the surface of the drum 3, where the laundry items to be washed are located.
  • the level 2c is predetermined, and is preferably tangential to the outer surface of the drum 3.
  • the level of the wash liquid accumulated in the portion 2b is detected by a sensor, e.g. a linear pressure switch 9 communicating with the lower portion 2b of the tub 2 via the duct 10.
  • the pressure switch 9 can detect the pressure generated by the water column accumulated in the portion 2b, and can therefore determine the height thereof with good accuracy.
  • the washing machine 1 also comprises additional elements and devices, such as, for example, a drum access door, a detergent compartment or the like, which are neither shown in the drawing nor described herein because they are per se known. It should therefore be assumed that a washing machine according to the present invention may comprise all such devices not shown in the drawings as well as other devices, which are considered to be prior art.
  • the sensor 9 is also connected to a control unit 11, which comprises a microcontroller capable of receiving information from the linear pressure switch 9.
  • this control unit 11 may additionally comprise, for example, a memory area containing, among other things, the laundry treatment operating programs, and may be adapted to control the general operation of the washing machine as well as the proper succession of the various laundry treatment stages.
  • the microcontroller of the control unit 11 is of a type also implementing a timer functionality, and can therefore take measurements by means of the linear pressure switch, at time intervals, with good accuracy.
  • the washing machine 1 is therefore adapted to implement the method of the present invention for controlling the draining of the wash liquid, as described below.
  • the linear pressure switch 9 that measures the level of the water contained in the portion 2b of the tub is further exploited to measure the drained wash liquid flow.
  • the level of the liquid in the portion 2b rises or falls at a speed that depends on the flow of water being respectively supplied or drained.
  • the level of the water is measured by the pressure switch 9.
  • the water flow is typically expressed as a volume per time unit, e.g. litres per minute [l/min].
  • the linear pressure switch 9 measures, at a first time instant, a first level of the water contained in the portion 2b. The linear pressure switch 9 then signals to the control unit 11 the reaching of this first water level, and the control unit 11 records the first time instant at which this has occurred.
  • the level of the water in the portion 2b will rise or fall, and the linear pressure switch 9 will measure, at a second time instant, a second water level. Again, the linear pressure switch 9 will signal to the control unit 11 the reaching of this second water level, and the control unit 11 will record the second time instant at which this has occurred.
  • the control unit 11 can therefore measure the time elapsed between the first-level and second-level measurements.
  • the volume of water supplied or drained between these two time instants can thus be calculated from the difference between the initial and final water volumes present in the tub portion 2b; such volumes are known from the design specifications of the shape of the tub 2.
  • the water flow is calculated by dividing the volume of water supplied or drained between the first level and the second level by the time elapsed between the two readings.
  • the shape of the tub 2 being known, one can find the correspondence between the readings of the linear pressure switch 9 at successive instants and the volume of water supplied into or drained from the tub within the same time interval, thereby computing the water flow, in particular the drained wash liquid flow.
  • the drained water flow can be calculated by means of other systems known in the art, such as, for example, known flow sensors.
  • the method provides for measuring the flow of wash liquid being currently drained in order to control the drain stage, as will be described in detail hereafter.
  • FIG. 2 is a flow chart that exemplifies one embodiment of a method for controlling the draining of wash liquid in a laundry washing machine. Said method is preferably implemented, in the washing machine 1, through suitable control means, such as the control unit 11, which is operationally connected to further devices of the washing machine 1, in order to implement the method described below.
  • suitable control means such as the control unit 11, which is operationally connected to further devices of the washing machine 1, in order to implement the method described below.
  • the start 101 of a wash liquid drain stage is signalled.
  • the level of the liquid accumulated in the tub 2, the revolution speed of the drum 3 and the status of the electrovalve 5 are then checked.
  • the draining means will be activated 103.
  • the drain stage will be stopped 104 and may then be resumed at a later time.
  • the draining means As already described, by activating 103 the draining means, or, preferably, by activating the pump 8 that removes the water from the duct 7, the wash liquid is drained.
  • the draining means are activated 103 for a predetermined time, preferably 10 seconds.
  • the liquid level in the portion 2b of the tub 2 is monitored to verify that it is above the "empty" level.
  • a measurement 105 is taken of the wash liquid flow currently being drained by the draining means.
  • Said measurement is preferably conducted by means of a plurality of readings taken by the pressure switch 9 and is calculated in a differential manner, as previously described.
  • the frequency of the readings taken by the linear pressure switch 9 may be as high as one reading per second.
  • the nominal flow Z is preferably at least 3.0 l/min, more preferably between 4.0 l/min and 6.0 l/min; however, the operation of the drain pump may be such as to allow reaching values of 14 l/min to 17 l/min.
  • the nominal flow value Z is preferably lower than the maximum flow obtainable by the drain pump, and only represents an indication of a flow corresponding to a "regular" operation of the washing machine's drain system.
  • Another flow value taken as a reference is the predetermined value "K", called “alarm flow”.
  • Said alarm flow value K is preferably equal to or smaller than 2.5 l/min, more preferably equal to or smaller than 1.5 l/min.
  • the draining means are considered to be in alarm conditions, because the wash liquid is not being completely drained or is taking place at an alarmingly reduced speed. (Of course, it is conceivable to provide that the washing machine will behave in a particular manner in the event that the measured flow is lower than the alarm flow K).
  • the washing machine will adopt an appropriate behaviour when the measured flow is comprised between the alarm flow K and the nominal flow Z; these conditions correspond to a partially clogged drain, i.e. the draining operation is clearly difficult, but not alarming.
  • Such difficulty may be due, for example, to a partial obstruction of the drain duct 7, also due to excessive foam or foreign bodies or sedimented residues, or even to partial clogging of the domestic drain system.
  • the drain pump 8 is activated for a predetermined number "C" of drain operations, preferably according to a suitable " duty cycle ".
  • the predetermined number C of drain operations is 5.
  • the drain pump 8 is preferably turned on for a minute and is then kept off for a wait time preferably lasting one minute.
  • Other activation and/or wait times are also possible, preferably longer than 30 seconds but shorter than 90 seconds.
  • the drain stage will end 104.
  • a measurement 208 is taken of the flow currently drained after each drain operation, or at least after one of them. Said measurement can preferably be taken as previously described.
  • the method provides for verifying 106 again the flow measured at step 208. In fact, it may happen that the problematic drain condition has cleared up spontaneously as described above, and the drained flow has returned above the nominal value Z again; in such a case, the problem is solved and the first drain stage, previously interrupted, can be continued by going back to step 102.
  • step 208 If at step 208 it is verified that the predetermined number C of drain operations have already been carried out, it must be assumed that the problem is a persistent one.
  • the spin stage 209 is not a common spin stage, since it is less intense.
  • the spin stage 209 comprises a rotation of the drum at a revolution speed comprised between 200 and 280 revolutions per minute, as opposed to a typical value of 350 revolutions per minute of an ordinary spin stage.
  • the spin stage 209 takes place at a drum revolution speed between 60% and 80% of the typical revolution speed (100%) used in the normal spin stage, depending on the specific characteristics of the washing machine.
  • drum rotation means are preferably activated in a more gradual manner in order to reach the revolution speed, from a standstill, in at least 10 seconds, preferably according to an increasing speed ramp, preferably a linear one.
  • the spin stage 209 allow to cope with non-optimal drain conditions and to send controlled pressure waves, generated by the spin 209, in order to try to clear the obstruction in the drain, e.g. by removing any foreign bodies or obstructions, such as accumulated lint. In this manner, after the spin stage 209 the drain system may turn out to be unobstructed, and optimal drain conditions may be restored.
  • the method provides for resuming the drain stage from the above-described step 102.
  • the spin stage 209 is only carried out after an adequate number of drain attempts, preferably 5. Moreover, such attempts after which the spin stage 209 is carried out do not excessively stress the draining means, thereby advantageously preventing the washing machine from suffering any further damage.
  • FIG. 3 shows a flow chart that exemplifies a further embodiment of a method for controlling the draining of wash liquid in a laundry washing machine. Said method is preferably implemented, in the washing machine 1, through suitable control means, such as the control unit 11, which is operationally connected to further devices of the washing machine 1, in order to implement the method described below.
  • suitable control means such as the control unit 11, which is operationally connected to further devices of the washing machine 1, in order to implement the method described below.
  • the start 101 of a wash liquid drain stage is signalled.
  • the level of the liquid accumulated in the tub 2, the revolution speed of the drum 3 and the status of the electrovalve 5 are then checked.
  • the draining means will be activated 103.
  • the drain stage will be stopped 104 and may then be resumed at a later time.
  • the draining means As already described, by activating 103 the draining means, or, preferably, by activating the pump 8 that removes the water from the duct 7, the wash liquid is drained.
  • the draining means are activated 103 for a predetermined time, preferably 10 seconds.
  • the liquid level in the portion 2b of the tub 2 is monitored to verify that it is above the "empty" level.
  • a measurement 105 is taken of the wash liquid flow currently being drained by the draining means.
  • Said measurement is preferably conducted by means of a plurality of readings taken by the pressure switch 9 and is calculated in a differential manner, as previously described.
  • the frequency of the readings taken by the linear pressure switch 9 may be as high as one reading per second.
  • the nominal flow Z is preferably at least 3.0 l/min; however, the operation of the drain pump may be such as to allow reaching values of 14 l/min to 17 l/min. At any rate, the nominal flow value Z is preferably lower than the maximum flow obtainable by the drain pump, and only represents an indication of a flow corresponding to a "regular" operation of the washing machine's drain system.
  • alarm flow is preferably equal to or smaller than 2.5 l/min, more preferably equal to or smaller than 1.5 l/min.
  • washing machine may also take on a different behaviour when the measured flow is comprised between the alarm flow K and the nominal flow Z.
  • the drain pump 8 is activated cyclically for a predetermined number "D" of drain operations, preferably according to a suitable " duty cycle ".
  • the predetermined number D of drain operations is 10.
  • the drain pump 8 is preferably turned on for two minutes and is then kept off for a wait time preferably lasting two minutes.
  • Other activation and/or wait times are also possible, preferably longer than 30 seconds or, more preferably longer than 60 seconds.
  • the drain stage will end 104.
  • a measurement 108 is taken of the flow currently drained after each drain operation, or at least after one of them. Said measurement can preferably be taken as previously described.
  • the method provides for verifying 106 the flow measured at step 108. In fact, it may happen that the problematic drain condition has cleared up spontaneously as described above, and the drained flow has returned above the nominal value Z again; in such a case, the problem is solved and the first drain stage, previously interrupted, can be continued by going back to step 102.
  • step 108 If at step 108 it is verified that the predetermined number D of drain operations have already been carried out, it must be assumed that the problem cannot be solved spontaneously.
  • Said malfunction signal 109 is only provided after an adequate number of draining attempts, preferably 10, have been carried out without solving the problem.
  • the present invention is also applicable to different types of washing machines, such as dishwashers.

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

Claims (15)

  1. Procédé de régulation de l'évacuation du liquide de lavage dans une machine à laver le linge (1), ladite machine à laver le linge (1) comprenant une cuve (2, 2b), des moyens d'évacuation (7, 8) permettant d'évacuer le liquide de lavage de ladite cuve (2, 2b), un tambour (3) adapté pour contenir le linge à laver, et des moyens de moteur permettant de faire tourner ledit tambour (3),
    ledit procédé comprenant les étapes consistant à :
    démarrer (101) une première étape d'évacuation, où lesdits moyens d'évacuation (7, 8) sont activés (103) ;
    mesurer (105) un débit du liquide de lavage évacué par lesdits moyens d'évacuation (7, 8) ;
    vérifier (106) que ledit débit est supérieur à une valeur de débit d' alarme prédéterminée (K) et inférieur à une valeur de débit nominal prédéterminée (Z) ;
    ledit procédé étant caractérisé en ce qu'il comprend en outre l'étape consistant à :
    démarrer (207) une seconde étape d'évacuation, où lesdits moyens d'évacuation (7, 8) sont activés cycliquement pour réaliser jusqu'à un nombre prédéterminé d'opérations d'évacuation (C), tandis que ledit débit reste supérieur à ladite valeur de débit d'alarme (K) et inférieur à ladite valeur de débit nominal (Z) et qu'il y a ledit liquide de lavage à évacuer.
  2. Procédé selon la revendication 1, comprenant l'étape consistant à :
    activer lesdits moyens de moteur, après la réalisation dudit nombre prédéterminé d'opérations d'évacuation (C), afin d'exécuter au moins une étape d'essorage (209),
    dans lequel en particulier ladite étape d'essorage (209) comprend une rotation dudit tambour (3) à une vitesse de révolution comprise de préférence entre 200 et 280 tours par minute et dans lequel en particulier, lors de ladite étape d'essorage (209), lesdits moyens de moteur sont activés de sorte à atteindre ladite vitesse de révolution, en démarrant à l'arrêt, de préférence en au moins 10 secondes.
  3. Procédé selon la revendication 1 ou 2, comprenant en outre l'étape consistant à :
    mesurer (208) au moins un second débit du liquide de lavage évacué par lesdits moyens d'évacuation (7, 8) après au moins l'une desdites opérations d'évacuation ;
    ledit procédé comprenant en outre en particulier l'étape consistant à :
    démarrer une étape d'évacuation différente de ladite seconde étape d'évacuation dans le cas où, suite à l'une desdites opérations d'évacuation, ledit second débit mesuré est inférieur à ladite valeur de débit d'alarme (K) ou supérieur au dit valeur de débit nominal (Z).
  4. Procédé selon l'une quelconque des revendications 1 à 3, dans lequel chacune desdites opérations d'évacuation comprend une étape d'activation desdits moyens d'évacuation (7, 8), dans lequel ladite étape d'activation dure de préférence plus de 30 secondes et moins de 90 secondes, et comprend une étape d'attente pendant laquelle lesdits moyens d'évacuation (7, 8) ne sont pas actifs, ladite étape d'attente durant de préférence plus de 30 secondes et moins de 90 secondes.
  5. Procédé selon l'une quelconque des revendications 1 à 4, dans lequel ledit débit de liquide est mesuré (105, 208) par l'intermédiaire d'une pluralité de lectures de pression prises par un pressostat linéaire (9) dans au moins un intervalle temporel et dans lequel en particulier ledit débit de liquide est mesuré par un calcul différentiel d'un rapport entre un volume d'eau estimé d'après lesdites lectures de pression et ledit au moins un intervalle temporel.
  6. Procédé selon l'une quelconque des revendications 1 à 5, dans lequel ladite valeur de débit d'alarme (K) est inférieure à 2,5 L/min, de manière davantage préférée inférieure à 1,5 L/min, et dans lequel ladite valeur de débit nominal (Z) est supérieure à 3,0 L/min, de manière davantage préférée entre 4,0 L/min et 6,0 L/min.
  7. Machine à laver le linge (1) comprenant une cuve (2, 2b) adaptée pour contenir un liquide de lavage, des moyens d'évacuation (7, 8) permettant d'évacuer ledit liquide de lavage de ladite cuve (2, 2b), un tambour (3) adapté pour contenir le linge à laver, et des moyens de moteur permettant de faire tourner ledit tambour (3), des moyens de détection (9, 10) adaptés pour mesurer un débit dudit liquide de lavage évacué, et une unité de régulation (11) raccordée opérationnellement auxdits moyens d'évacuation (7, 8) et auxdits moyens de détection (9, 10),
    caractérisée en ce qu'elle est adaptée pour mettre en oeuvre le procédé de régulation de l'évacuation selon l'une quelconque des revendications 1 à 6.
  8. Procédé de régulation de l'évacuation du liquide de lavage dans une machine à laver le linge (1), ladite machine à laver le linge (1) comprenant une cuve (2, 2b) et des moyens d'évacuation (7, 8) permettant d'évacuer le liquide de lavage de ladite cuve (2, 2b), ledit procédé comprenant les étapes consistant à :
    démarrer (101) une première étape d'évacuation, où lesdits moyens d'évacuation (7, 8) sont activés (103) ;
    mesurer (105) un débit de liquide de lavage évacué par lesdits moyens d'évacuation (7, 8) ;
    vérifier (106) que ledit débit est inférieur à une valeur de débit d'alarme prédéterminée (K) ;
    ledit procédé étant caractérisé en ce qu'il comprend en outre l'étape consistant à :
    démarrer (107) une seconde étape d'évacuation, où lesdits moyens d'évacuation (7, 8) sont activés cycliquement pour réaliser jusqu'à un nombre prédéterminé d'opérations d'évacuation (D), tandis que ledit débit reste inférieur à ladite valeur de débit d'alarme (K) et qu'il y a ledit liquide de lavage à évacuer.
  9. Procédé selon la revendication 8, comprenant en outre l'étape consistant à :
    mesurer (108) au moins un second débit de liquide de lavage évacué par lesdits moyens d'évacuation (7, 8) après au moins l'une desdites opérations d'évacuation,
    ledit procédé comprenant en outre en particulier l'étape consistant à :
    démarrer une étape d'évacuation différente de ladite seconde étape d'évacuation dans le cas où, suite à l'une desdites opérations d'évacuation, ledit second débit mesuré est supérieur à ladite valeur de débit d' alarme (K).
  10. Procédé selon les revendications 8 ou 9, dans lequel chacune desdites opérations d'évacuation comprend une étape d'activation desdits moyens d'évacuation (7, 8), dans lequel ladite étape d'activation dure de préférence plus de 30 secondes, de manière davantage préférée plus de 60 secondes, et comprend une étape d'attente pendant laquelle lesdits moyens d'évacuation (7, 8) ne sont pas actifs, ladite étape d'attente durant de préférence plus de 30 secondes, de manière davantage préférée plus de 60 secondes.
  11. Procédé selon l'une quelconque des revendications 8 à 10, dans lequel ledit débit de liquide est mesuré (105, 208) par l'intermédiaire d'une pluralité de lectures de pression prises par un pressostat linéaire (9) dans au moins un intervalle temporel et dans lequel ledit débit de liquide est mesuré par un calcul différentiel d'un rapport entre un volume d'eau estimé d'après lesdites lectures de pression et ledit au moins un intervalle temporel.
  12. Procédé selon l'une quelconque des revendications 8 à 11, dans lequel lesdits moyens d'évacuation (7, 8) comprennent au moins une pompe hydraulique (8).
  13. Procédé selon l'une quelconque des revendications 8 à 12, comprenant en outre l'étape consistant à :
    signaler un dysfonctionnement (109) après la réalisation dudit nombre prédéterminé d'opérations d'évacuation, dans le cas où il reste encore du liquide de lavage résiduel à évacuer.
  14. Procédé selon l'une quelconque des revendications 8 à 13, dans lequel ladite valeur de débit d'alarme (K) est inférieure à 2,5 L/min, de manière davantage préférée inférieure à 1,5 L/min.
  15. Machine à laver le linge (1) comprenant une cuve (2, 2b) adaptée pour contenir un liquide de lavage, des moyens d'évacuation (7, 8) permettant d'évacuer ledit liquide de lavage de ladite cuve (2, 2b), des moyens de détection (9, 10) adaptés pour mesurer un débit dudit liquide de lavage évacué, et une unité régulation (11) raccordée opérationnellement auxdits moyens d'évacuation (7, 8) et auxdits moyens de détection (9, 10),
    caractérisée en ce qu'elle est adaptée pour mettre en oeuvre le procédé de régulation de l'évacuation selon l'une quelconque des revendications 8 à 14.
EP13831871.2A 2012-12-21 2013-12-20 Procédé de contrôle de l'évacuation d'un liquide de lavage dans une machine à laver le linge, et machine à laver le linge associée Not-in-force EP2935676B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT001139A ITTO20121139A1 (it) 2012-12-21 2012-12-21 Metodo di controllo dello scarico di liquido di lavaggio in una macchina lavabiancheria, e relativa macchina lavabiancheria
IT001140A ITTO20121140A1 (it) 2012-12-21 2012-12-21 Metodo di controllo dello scarico di liquido di lavaggio in una macchina lavabiancheria, e relativa macchina lavabiancheria
PCT/IB2013/061201 WO2014097251A1 (fr) 2012-12-21 2013-12-20 Procédé de contrôle de l'évacuation d'un liquide de lavage dans une machine à laver le linge, et machine à laver le linge associée

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EP2935676A1 EP2935676A1 (fr) 2015-10-28
EP2935676B1 true EP2935676B1 (fr) 2016-07-20

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EP (1) EP2935676B1 (fr)
RU (1) RU2015126088A (fr)
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Cited By (1)

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US11905643B2 (en) 2022-03-16 2024-02-20 Haier Us Appliance Solutions, Inc. Fault detection for a water level detection system of a washing machine appliance

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EP2993262B1 (fr) * 2014-09-02 2017-11-15 Electrolux Appliances Aktiebolag Procédé de lavage du linge dans une machine à laver le linge
CN106811916B (zh) * 2015-12-02 2020-10-09 青岛海尔滚筒洗衣机有限公司 一种洗衣机的排水方法
DE102017201008B3 (de) * 2017-01-23 2018-06-21 BSH Hausgeräte GmbH Wäschepflegegerät mit einer Steuerung
CN109629187A (zh) * 2018-12-11 2019-04-16 青岛海尔洗衣机有限公司 洗衣机排水控制方法
CN111336988B (zh) * 2020-04-02 2022-08-02 南京南瑞水利水电科技有限公司 双排水回路水管式沉降仪
CN113215768B (zh) * 2021-04-16 2022-12-23 海信冰箱有限公司 洗衣机的控制方法、装置、介质及洗衣机

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WO2006073372A2 (fr) * 2005-01-08 2006-07-13 Toon Jin Pang Systeme de recyclage automatique d'eau
AU2012244222B2 (en) * 2005-11-04 2016-01-28 Fisher & Paykel Appliances Limited Improvements Relating to Washing Machines
ITTO20091022A1 (it) 2009-12-22 2011-06-23 Indesit Co Spa Macchina lavabiancheria con centrifuga
ITTO20100659A1 (it) 2010-07-29 2012-01-30 Indesit Co Spa Metodo per misurare la portata d'acqua in una macchina lavabiancheria
US20120117735A1 (en) * 2010-11-16 2012-05-17 Bsh Home Appliances Corporation System for and method of detecting imbalance of a laundry machine
DE102011000287B4 (de) * 2011-01-24 2014-09-11 Miele & Cie. Kg Verfahren zur Einstellung eines von einer Umwälzpumpe in einem wasserführenden Haushaltgerät geförderten Volumenstroms

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11905643B2 (en) 2022-03-16 2024-02-20 Haier Us Appliance Solutions, Inc. Fault detection for a water level detection system of a washing machine appliance

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WO2014097251A1 (fr) 2014-06-26
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