EP3241938B1 - Procédé pour commander une machine à laver - Google Patents

Procédé pour commander une machine à laver Download PDF

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Publication number
EP3241938B1
EP3241938B1 EP16168537.5A EP16168537A EP3241938B1 EP 3241938 B1 EP3241938 B1 EP 3241938B1 EP 16168537 A EP16168537 A EP 16168537A EP 3241938 B1 EP3241938 B1 EP 3241938B1
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EP
European Patent Office
Prior art keywords
weight
drum
water
laundry
washing
Prior art date
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Application number
EP16168537.5A
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German (de)
English (en)
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EP3241938A1 (fr
Inventor
Andrea Mazzon
Marco Clara
Elisa Stabon
Elena Pesavento
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Electrolux Appliances AB
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Electrolux Appliances AB
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Priority to PL16168537T priority Critical patent/PL3241938T3/pl
Priority to EP16168537.5A priority patent/EP3241938B1/fr
Publication of EP3241938A1 publication Critical patent/EP3241938A1/fr
Application granted granted Critical
Publication of EP3241938B1 publication Critical patent/EP3241938B1/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
    • D06F33/36—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of washing
    • 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
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/06—Type or material
    • 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
    • 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
    • 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
    • D06F2105/56—Remaining operation time; Remaining operational cycles
    • 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
    • D06F34/28—Arrangements for program selection, e.g. control panels therefor; Arrangements for indicating program parameters, e.g. the selected program or its progress
    • D06F34/32—Arrangements for program selection, e.g. control panels therefor; Arrangements for indicating program parameters, e.g. the selected program or its progress characterised by graphical features, e.g. touchscreens

Definitions

  • the present invention relates to a method to control a washing machine and to a washing machine.
  • a washing machine includes a tub where water is introduced, a drum which is rotatably mounted inside the tub to receive laundry, such as clothes, shoes, accessories etc., and a motor which generates a drive force to rotate the drum, thereby allowing washing to be performed via tumbling of laundry in the drum.
  • the laundry is tumbled along an inner wall of the drum during rotation of the drum.
  • washing programs or cycles include a washing step to eliminate stains on laundry using water and preferably also a detergent, and a rinsing step to rinse the laundry.
  • the weight of the load which is introduced in a washing machine is a relevant parameter for the correct operations of the washing machine in a washing cycle.
  • the weight of the laundry indeed may determine the correct amount of water and/or detergent which needs to be introduced inside the tub or drum during a washing step or the speed at which the drum should be rotated in order to wash the laundry properly or not to create imbalances and noises. Further, it may influence the overall duration time of the washing cycle.
  • weighting the laundry with a weighting scale or the like is not a feasible step to be achieved in a washing machine, due to its construction and the presence of water. Further, the weighting of the laundry should not increase the costs of production of the washing machine in such a way that it may change the overall apparatus cost noticeably.
  • EP1423563 discloses a method for washing in a washing machine, which can measure an accurate washing load before actual washing is carried out.
  • the present invention provides a method for controlling washing in a washing machine, including (a) introducing laundry into a drum of the washing machine, (b) measuring an initial washing load caused by the introduced laundry, (c) repeating water supply to the drum for a fixed time period for maintaining a minimum water level determined by the initial washing load, taking water absorbed to the laundry into account, (d) after the preset water supply time period, determining a final washing load in the drum based on a number of water resupply times for an elapsed time from the initial water supply, and (e) washing the laundry by a washing method preset according to the determined final washing load.
  • EP2871274 describes a washing machine and control method thereof capable of accurately detecting the weight of laundry received in the washing machine by primarily detecting the weight of the laundry according to driving of a motor before the beginning of a washing process and correcting the primary detected weight of laundry according to the number of supplies of water which is additionally supplied within a given time after main water supply is completed during the washing process.
  • US 2011/0030460 discloses a method for determining the amount of laundry in a laundry treating appliance which comprises determining a first load amount based on a characteristic of the oscillating of a drum and determining if the first load amount satisfies a load amount threshold.
  • the drum may be rotated in accordance with a laundry inertia algorithm to determine inertia of the load.
  • the second load amount may then be determined based on the inertia of the laundry.
  • the invention relates to a method to control a washing machine, the washing machine including a tub and a drum, the drum being rotatably mounted inside the tub and apt to contain laundry to be washed, the method comprising:
  • a washing machine may indicate a "simple" washing machine where the washing of laundry is performed, or a combined washer dryer, where, in addition to the washing, drying of the laundry is performed.
  • the washing machine includes a drum where laundry is located, which can rotate around an axis by means of a motor.
  • the axis of rotation of the drum can be horizontal, that is, substantially parallel to a surface where the appliance is located or slightly tilted to it, or vertical. Therefore, the washing machine might be a front loading washing machine or a top loading washing machine as well.
  • the washing machine further preferably comprises a casing, preferably but not necessarily parallelepiped-shaped, on which a door is advantageously hinged to access and close the drum in order to load or unload the laundry to be washed.
  • the door is preferably hinged on a front wall of the casing in case of a front loading washing machine, while it is hinged on a top wall of the casing in case of a top loading washing machine.
  • the washing machine is connected to a water supply, for example to the water mains, by means of suitable pipes which can be opened or closed, for example by a valve, in order to introduce water to the drum.
  • suitable pipes which can be opened or closed, for example by a valve, in order to introduce water to the drum.
  • One or more discharge pipes can be present as well in order to discharge water from the drum.
  • a drawer or other container is also preferably present and fluidly connected to the drum in order to introduce detergent into the drum itself, if needed during the laundry washing.
  • the washing machine may further include a control panel, for example located in an upper portion of the casing, where inputs or commands can be selected by an user, and/or information about the status of the washing machine can be displayed, for example by means of a display or one or more light indicators.
  • a control panel for example located in an upper portion of the casing, where inputs or commands can be selected by an user, and/or information about the status of the washing machine can be displayed, for example by means of a display or one or more light indicators.
  • a washing machine include a plurality of washing programs or cycles.
  • Each washing program preferably includes a washing step where the laundry is washed, such as tumbled, and a rinsing step, where the laundry is rinsed.
  • the washing program may also include a spinning step where the drum is rotated at relatively high velocity. Further steps may be present as well, for example a pre-washing or others.
  • the various cycles may differ one from the others for the duration of the same, for the number or rinsing steps, for the temperature of the washing water, for the amount of detergent and so on.
  • the washing programs are preferably designed to treat laundry made of a specific textile type or composition or type of dirt or stain.
  • a cotton cycle program at high temperature is generally present, as well as a delicate cycle program for delicate textiles (e.g. silk) at lower temperatures.
  • a washing program or cycle is set.
  • the washing program or cycle is generally set either by a user operating on the control panel, for example by means of a switch, button, knobs and the like, or automatically, that is, a predefined washing program is stored on a memory of the washing machine and automatically selected when the appliance is switched on.
  • the washing machine may "auto-select" the washing program among the available ones, for example all stored in a memory, depending on one or more characteristics of the laundry inserted in the drum, which are automatically detected.
  • the setting of a washing cycle predefines one or more of a plurality of parameters, that is, given the washing program, for example the duration of the same may be defined, as well as the type and quantity of detergent to be used, the temperature of the water, the amount of water to be used in washing, the amount of water to be used in rinsing, the revolution per minute of the drum, and others.
  • a calculation of a first weight of the laundry introduced into the drum is performed before water is introduced inside the drum and/or tub to wash the laundry, for example before the beginning of the washing cycle which has been set. Such calculation takes place in any known manner, by means of a first weight sensor.
  • the first weight sensor may be a mechanical sensor of the weight of the laundry, but it may also be a predictive algorithm calculating the first weight by statistical methods. This first weight calculation determines a certain value of the weight of the laundry introduced in the drum which is compared with a first threshold.
  • the calculation of the first weight is relatively "rough", that is, with a relatively low precision, and performed in a rather fast manner.
  • the first threshold is preferably comprised in a range between about from 1/5 to 3/5 of the maximum admissible laundry load. More preferably it is of about 2 kg.
  • the first threshold therefore may depend on the type of washing machine, because not all washing machines have the same maximum load. Commonly, washing machines having a maximum load of 5 kg, 8 kg or 4 kg are known for household uses.
  • the first threshold is used to discern between a "heavy load”, that is, when the first weight is above the first threshold means that the laundry which is present inside the drum of the washing machine is “heavy”, or a "light load”, that is, when the first weight is below the first threshold then the laundry present inside the drum is "light”.
  • a second weight of the laundry is calculated.
  • This second weight is calculated after water has been introduced into the tub and/or drum.
  • a parameter of the washing cycle which has been set is determined.
  • Such parameter could be any, and it is chosen so as to optimize the set washing cycle when the load is "heavy", that is, when the weight of the laundry is high.
  • the parameter could be at the beginning set according to "standards", for example according to a memorized value stored in a memory of the washing machine, and then updated as soon as the second weight is calculated and thus an optimized parameter for such weight can be determined.
  • the parameter which is changed in the washing cycle may vary and may depend on the cycle itself.
  • a more accurate "investigation" of the weight of the laundry is performed only when there is a hint from the first weight calculation that the weight is above the first threshold. If the weight is above such a first threshold, the weight is calculated again, for example preferably in a longer and/or more precise manner, and the result of this second calculation is used to determine a parameter of the washing cycle. Thus, before varying a parameter of the washing cycle, it is determined whether the load is really "heavy", so that extra energy is used only if needed. Further, the amount of data processing is also minimized. The second weight is calculated only when necessary and therefore when the first weight is below the first threshold further calculations are avoided. The washing cycle of heavy loads is therefore optimized and a better quality is achieved.
  • the method further includes:
  • the initial, preferably "rough" calculation is used to set for example one or more parameter of the washing cycle.
  • the cycle in this way is simpler because no further - preferably longer - second calculation of the weight is needed and the initial, preferably rapid, first calculation is enough. Indeed, light laundry poses less problems, in general, than the heavy one during the washing cycle.
  • the method further includes, after introducing water in the tub:
  • the second weight calculation is preferably an accurate calculation, that is, preferably more accurate than the first calculation, and also it may last longer than the first calculation in order to obtain the second weight value.
  • the second calculation is performed after the water has been allowed into the drum, for example via an inlet pipe, and it uses the amount of water introduced as an indicator of the weight of the laundry.
  • the level of the water in the drum is thus checked as a measure of the amount of water in it and of the amount of water absorbed by the laundry.
  • the variations of the water level due to the absorbance of the water introduced in the drum by the laundry are monitored and when these variations remain below a certain value, that is, when these variations are "small", then the second weight is calculated.
  • determining a parameter of the set washing cycle on the basis of said second weight, independently from the first weight includes: ⁇ determining the time duration of the set washing cycle.
  • One of the parameter of the set washing cycle that is preferably influenced by the weight of the laundry is for example the length or duration of the whole set washing cycle. Therefore, if the first weight is above the first threshold, the duration of the cycle is determined on the basis of the second weight. Generally, the higher the weight, the longer the duration of the set washing cycle.
  • determining a parameter of the set washing cycle on the basis of said first weight includes: ⁇ determining the time duration of the set washing cycle.
  • the weight of the laundry may influence the optimal duration of the cycle, thus a "pre-set" duration, such as the one stored in the memory of the appliance might not be the optimal one for such a high load.
  • a "pre-set" duration such as the one stored in the memory of the appliance might not be the optimal one for such a high load.
  • the duration of the laundry is calculated on the basis of the first weight only.
  • determining a parameter of the set washing cycle on the basis of said first weight includes: ⁇ determining an amount of water to be loaded into the drum during the set washing cycle.
  • the amount of water to be introduced in the drum may vary.
  • the amount of water which depends on the weight of the laundry is the water during the rinsing step. More preferably, the number of rinsing steps depend on the weight of the laundry.
  • the method further includes:
  • the quantity of water which is introduced is preferably dependent on the set washing cycle. After the water has been introduced into the drum, in an amount which implies that the water is in contact with the laundry, variations of the level of the water inside the drums are calculated. The water inside the drum changes its level with time due to the fact that the laundry absorbs at least part of the introduced water. Thus, the level of the water changes from its initial level to a lower level after a certain time period. If the variations of the level are "small", that is, if the difference between the initial water level and a level after a predetermined amount of time are below a given value called second threshold, then the water introduction is stopped. If however the variations are above such a second threshold, then the water is again introduced inside the drum and the level of the same is again monitored.
  • the water introduction is stopped, otherwise the cycle is again repeated.
  • the variation of the water level is preferably calculated subtracting from the level of the water at the beginning of the pre-determined time interval, the water level at the end of the predetermined time interval.
  • the drum is rotated during water introduction. The drum is rotated so that the water may be better absorbed by the whole laundry present in the drum.
  • the method includes the steps of:
  • a predefined amount of water is introduced in the drum. This amount is predefined and preferably depends on the set washing cycle. After the water introduction, the water level in the drum is checked, it is waited for a given time interval and after this time interval has elapsed, the level of water in the drum is checked again. A variation of the water level can be thus calculated, subtracting from the initial water level the end water level. If the laundry has absorbed so much water that the variation of the water level is above a third threshold, more water is introduced, again in a predefined amount, and the steps above are repeated, to check whether the water level variations are still "big", i.e. above the third threshold limit. As above, the water level may be monitored with or without drum rotations.
  • the time interval is set so that generally the laundry has absorbed all the water it can absorb within it, so that the level of water into the drum cannot get lower than a given value even if more time than the pre-set one elapses.
  • the second weight can be determined on the basis of the amount of water absorbed by the laundry.
  • said washing machine includes a motor driving the drum in rotation and calculating a first weight of the laundry in the drum before water is supplied to the drum and/or tub includes: ⁇ calculating the first weight by detecting one or more parameters of the motor while the drum is rotating.
  • the drum is rotated by means of a motor, which may also control the drum velocity and the reversal of rotations, if needed.
  • a motor which may also control the drum velocity and the reversal of rotations, if needed.
  • parameters of the motor while it rotates the drum are calculated, for example sensed or detected by suitable sensor(s) which are commonly present in a washing machine for other purposes.
  • One of these parameters can be for example the torque of the motor.
  • one or more of the following can be used as well:
  • said washing machine includes a motor driving the drum in rotation and calculating a first weight of the laundry in the drum before water is supplied to the drum and/or tub includes:
  • the weight of the laundry in a laundry treatment appliance is a quantity that is either unmeasurable or costly/time-consuming to obtain. Therefore in the present invention a statistical model-based technology addressed to industrial environments that provide an estimate of such quantity is used.
  • the primary purpose of sensors is to deliver data for process monitoring and control.
  • predictive models are called Soft Sensors: term is a combination of the words "software”, because the models are usually - but not necessarily - computer programs, and "sensors”, because the models are delivering similar information as their hardware counterparts.
  • Other common terms for predictive sensors in the process industry are inferential sensors, virtual sensor or on- line analyser and observer-based sensors.
  • Soft Sensors Two different classes of Soft Sensors, namely model-driven and data-driven, can be distinguished.
  • Model-driven models are also called white-box models because they have full phenomenological knowledge about the process background.
  • data-driven models are called black-box techniques because the model itself has no knowledge about the process and is based on empirical observations of the process.
  • a typical example of such a combination is a model-driven Soft Sensor making use of data- driven method for the modelling of fractions which can not be modelled easily in terms of phenomenological models.
  • the present invention preferably uses a data driven model, being based on empirical data. Therefore a data-driven soft sensor is an inferential statistical model developed from process observations.
  • the soft sensor which normally operates using a software, might be embedded in the control unit of the appliance.
  • the same control unit - as already stated - preferably controls also the appliance during its functioning, that is, during the execution of the selected laundry program, for example sending command signals to the motor of the drum and to the other components participating in the correct functioning of the appliance. For example, in a heat pump dryer, the control unit sends command signals to the heat pump.
  • the weight of the laundry introduced inside the washing machine is predicted.
  • This prediction is obtained by means of a statistical method by means of a soft sensor which is data driven.
  • the operation of "training" the soft sensor is preferably performed in the production site. Without adding further elements (such as a new sensor) to the appliance, a prediction of the weight of the laundry is obtained.
  • said step of predicting a weight of the laundry by means of a data driven soft sensor includes a step of predicting a weight of the laundry by means of a supervised learning prediction.
  • the soft sensor of the invention uses a supervised learning method, that is a learning task of inferring a function from labelled training data.
  • the training data consist of a set of training examples.
  • each example is a pair consisting of an input object (typically a vector) and a desired output value (also called the supervisory signal ).
  • a supervised learning algorithm analyses the training data and produces an inferred function, which can be used for mapping new examples.
  • the soft sensor uses the operating conditions of the appliance during the selected program and the output value includes the weight of the laundry present in the drum of the laundry treatment appliance. This is done after the algorithm had been properly trained by the training examples which are data collected in field tests of the appliance.
  • determining a parameter of the set washing cycle on the basis of said second weight, independently from the first weight includes one or more:
  • the parameter of the set washing cycle which is determined using the value of the second weight may also depends on other characteristics or inputs of the washing machine. For example, if the type of laundry, that is, the type of textile forming the laundry or the main colour of the laundry such as "white” or “coloured” is inputted, the parameter to be determined depending on the second weight takes into account this additional information as well.
  • determining a parameter of the set washing cycle on the basis of said first weight further includes:
  • a user prefers to receive information about the status of the washing cycle.
  • One of these desired information is the duration of the washing cycle. So, if the first weight is below the first threshold, the duration of the washing cycle is determined by the first weight (the second weight is not calculated) and thus such information is visualized to the user, for example by means of a display.
  • the method further includes:
  • determining a parameter of the set washing cycle on the basis of said first weight includes
  • some parameters of the washing cycle are already calculated just after the first weight calculation and for example displayed.
  • One of such parameters could be for example the duration of the washing cycle.
  • the parameter is updated so that the user can see the correct parameter and rely on it.
  • the update could also result in keeping the parameter equal to what it had been determined using the first weight.
  • the duration calculated using the first weight could be identical to the duration calculated using the second weight.
  • the method according to the invention includes:
  • the user may introduce some constraints to the set washing cycle, that is, it may determine the "wished value" of certain parameters of the set washing cycle.
  • One of such parameters can be for example the duration of the washing cycle.
  • the duration of the washing cycle as determined using the first or second weight is longer than what has been inputted by the user, then preferably the "wish duration" inputted overrules the calculated duration determined using the first or second weigh. If the duration of the washing cycle as determined using the first or second weight is shorter than what has been inputted by the user, then preferably the duration which has been calculated using the first or the second weight overrules what it has been inputted and it will be the real duration of the washing cycle. In other words, the real duration is preferably the shorter between the inputted and the calculated ones.
  • said washing machine is a front loading washing machine.
  • the step of calculating the first weight lasts less than 1 minute.
  • the first weight calculation from its beginning to its end, that is, till the results is outputted, lasts less than a minute, for example about 30 seconds.
  • the first weight calculation is performed before the washing cycle starts. It is a relatively "fast calculation", where speed prevails preferably over accuracy.
  • the step of calculating the second weight lasts less than 30 minutes.
  • the second weight calculation lasts generally longer than the first weight calculation, and it is also preferably more accurate.
  • the second weight calculation has a duration which may also depends on the type of laundry, that is for example the longest duration calculated is for a cotton washing cycle.
  • washing machine 1 is a "standard washing machine” with no drying functionality (i.e. a washing machine which can only wash and rinse the laundry).
  • washer - dryers i.e. a washing machine which can also dry the laundry
  • the washing machine 1 according to the invention which is schematically illustrated in the enclosed Figures is advantageously of the front-loading type; it is however clear that the invention is applicable, substantially without any crucial modification, to a top-loading washing machine.
  • the washing machine 1 comprises an external casing 2 in which frontal wall 2a an access opening 3 is obtained, provided with a loading/unloading door 4, which allows the access to a washing tub 5 contained in the external casing 2; the washing tub 5 contains a rotatable perforated drum 6 in which the laundry to be washed, not depicted in the drawings, can be loaded and unloaded.
  • the drum 6 embodies, therefore, a treating chamber in which one or more items (pieces of laundry in this advantageous embodiment) can be loaded and treated with water and one or more additives (washing/rinsing products in this advantageous embodiment).
  • the rotational axis of the drum 6 is substantially horizontal.
  • the washing tub 5 is connected to the external casing 2 preferably via a flexible bellows, not represented, connected between the frontal, opened, surface of the washing tub 5 facing the access opening 3, and the border of the latter.
  • the washing tub 5 is advantageously elastically supported by the external casing 2 via a suitable resilient support system, comprising, for example, springs 8; preferably the oscillations of the washing tub 5 are damped by suitable shock-absorbing devices or dampers 9, interposed between the washing tub 5 and the bottom of the casing 2.
  • a suitable resilient support system comprising, for example, springs 8; preferably the oscillations of the washing tub 5 are damped by suitable shock-absorbing devices or dampers 9, interposed between the washing tub 5 and the bottom of the casing 2.
  • washing tub 5 may be associated to the casing 2 in any other suitable way.
  • the washing machine 1 comprises a water inlet circuit, not visible in the figures, adapted for feeding water and washing/rinsing products, into the washing tub 5;
  • the water inlet circuit comprises, for example, a removable drawer 19, adapted to be filled with washing and/or rinsing products, e.g. liquid or concentrate or gel detergent, or powder detergent, or softener, an inlet duct, also not represented, connectable to water delivery means present outside the washing machine 1 and adapted to deliver fresh water to the drawer 19 and/or to the tub, and an outlet duct, fluidly connecting the drawer 19 and the washing tub 5 and adapted to deliver water and washing/rinsing products into the washing tub 5.
  • washing and/or rinsing products e.g. liquid or concentrate or gel detergent, or powder detergent, or softener
  • an inlet duct also not represented, connectable to water delivery means present outside the washing machine 1 and adapted to deliver fresh water to the drawer 19 and/or to the tub
  • an outlet duct fluidly connecting the drawer 19 and
  • the washing machine 1 also advantageously comprise a draining circuit, fluidly connected to the bottom of the washing tub 5 and adapted to drain the washing/rinsing liquid from the washing tub 5; in a further embodiment, not illustrated, the draining circuit may be also provided with a recirculation circuit, adapted to drain the washing/rinsing liquid from the bottom of the washing tub 5, and to re-admit such liquid into an upper region of the washing tub 5, for improving the wetting of the laundry.
  • a draining circuit fluidly connected to the bottom of the washing tub 5 and adapted to drain the washing/rinsing liquid from the washing tub 5; in a further embodiment, not illustrated, the draining circuit may be also provided with a recirculation circuit, adapted to drain the washing/rinsing liquid from the bottom of the washing tub 5, and to re-admit such liquid into an upper region of the washing tub 5, for improving the wetting of the laundry.
  • Water inlet circuit and draining circuit are considered standard and known in the art and therefore not further discussed.
  • the washing machine 1 also comprises some electric and/or electronic components, adapted for performing some specific functions; for example the washing machine comprises an electric motor 11 for rotating the rotatable drum 6, a valve (not shown) adapted to deliver the washing/rinsing liquid into the washing tub 5, an electric pump (not shown) adapted to drain and/or to recirculate the washing/rinsing liquid from the washing tub 5, an electric heater (also not shown) adapted to heat the washing/rinsing liquid, etc.
  • the washing machine comprises an electric motor 11 for rotating the rotatable drum 6, a valve (not shown) adapted to deliver the washing/rinsing liquid into the washing tub 5, an electric pump (not shown) adapted to drain and/or to recirculate the washing/rinsing liquid from the washing tub 5, an electric heater (also not shown) adapted to heat the washing/rinsing liquid, etc.
  • the drum 6 is advantageously rotated by the electric motor 11 which preferably transmits the rotating motion from a motor shaft 24 to the drum 6, advantageously by means of a belt/pulley system 29.
  • the motor 11 can be directly associated with the shaft 24 of the drum 6.
  • the washing machine 1 advantageously comprises a logic unit (for example an electronic board, a microcontroller, a microprocessor, or any other similar electronic control unit/device), schematically indicated in Figure 1 with the block numbered 12, configured to control the electric and/or electronic components of the washing machine 1, so as to make the washing machine 1 to perform a washing cycle, advantageously comprising one or more phases; for example the washing cycle may comprise a prewash phase, a soaking phase, a main washing phase (comprising, for example, the adduction into the washing tub 5 of water mixed with detergent and the rotation of the drum 6, so as to apply a mechanical action on the laundry), a steam supplying phase, a rinsing phase, a spinning phase, etc.
  • a logic unit for example an electronic board, a microcontroller, a microprocessor, or any other similar electronic control unit/device
  • the washing cycle may comprise a prewash phase, a soaking phase, a main washing phase (comprising, for example, the adduction
  • the washing cycle may comprise one or more of the above mentioned phases (or also other phases well known in the art) adapted to apply to the laundry to be washed a specific chemical and/or physical action.
  • a phase of the washing cycle may be performed, during a single washing cycle, only once or also two or more times.
  • the duration of the overall washing cycle depends on the kind, on the number, and on the duration of its phases.
  • Each washing cycle is defined by a plurality of parameters, which are for example stored in a memory of the control unit 12. These parameters may include the duration of the cycle, the water temperature during the main washing phase, the number of rinsing phases, and so on. Thus, when a program among the plurality is set, a plurality of parameters is set as well.
  • the washing machine 1 is also provided with a first weight sensor, schematically represented in Figure 1 with the block numbered 13, which is configured to detect/measure the weight of the laundry loaded in the rotatable drum 6.
  • the weight sensor 13 may comprise one or more transducers, operatively connected to the logic unit 12; the transducers may comprise, for example, a load cell or a strain gauge and can be associated with the resilient support system 8, 9 supporting the washing tub 5, as for example depicted in figure 2 .
  • the first weight sensor 13 is a soft sensor measuring the weight of the laundry by means of an algorithm. Most preferably, it is part of the control unit 12.
  • first weight sensor 13 is not critical for the invention, and therefore substantially any device adapted to measure the weight of the laundry loaded into the rotatable drum 6 may be used.
  • the first weight sensor 13 is apt to measure a weight of the laundry when the laundry is in a dry state, that is, before water is introduced inside the drum 6.
  • the washing machine 1 comprises an user interface 14, which is operatively connected to the logic unit 12 and is configured to allow the user to manually set a washing cycle to be performed. Alternatively, the washing cycle can be set automatically.
  • User interface 14 may comprise, for example, a touch screen display, adapted to display information and to receive inputs from the user, and or it may comprise a one or more buttons, and/or switches, and/or knobs, and/or displays, etc. allowing the user to receive information and to input instructions/commands directed to the logic unit 12.
  • the user may program the washing machine 1 with one or more parameters indicating his/her "wish values" for them. That is, when the washing program or cycle is set, the user may change some of the pre-memorized values of these parameters by inputting its wished value from the user interface 14. These user's inputs overrule the standard memorized values for the parameters.
  • User interface 14 may be further configured to display user information; this information may comprise the name of a particular washing cycle, the weight of the loaded laundry, the duration of the washing cycle, the temperature of the washing/rinsing liquid, the rotating speed of the spinning, etc. More in general the user interface 14 is designed to present information related to the washing cycle and/or the status of the washing machine 1 and even more preferably it is designed to display the duration of the washing cycle.
  • the user interface 14 advantageously comprises a display device, preferably a LCD or a LED display, designed to present user information, and a separated input device, not illustrated, comprising for example a keyboard, and/or a set of keys or knobs, and/or one or more touch-sensitive input devices, etc., adapted for setting a washing cycle and washing-product information.
  • a display device preferably a LCD or a LED display
  • a separated input device not illustrated, comprising for example a keyboard, and/or a set of keys or knobs, and/or one or more touch-sensitive input devices, etc., adapted for setting a washing cycle and washing-product information.
  • the logic unit 12 may be advantageously integrated in the user interface 14.
  • the washing machine includes a second weight sensor 16 apt to measure a weight of the laundry in the wet state.
  • this second weight sensor 16 can be any as long as is apt to measure the weight of the laundry when it is wet.
  • This second weight sensor 16 can also be a soft sensor, that is, an algorithm, and can be part of the logic unit 12, as depicted in figure 2 .
  • a method of controlling the washing machine 1 will be described in more detail as follows, with reference to figure 4 .
  • a washing program or cycle among the stored plurality is set in the washing machine in step 1F.
  • Such program or cycle may be inputted by the user.
  • a plurality of parameters of the same is set, the values of which may be changed according to the method of the invention.
  • the user may also indicate a value of one or more of these parameters of the washing cycle in step 2F, such as "wishing parameters values”.
  • the inputs of the user therefore may change in step 2F the initially pre-determined memorized values of the parameters of the set washing cycle.
  • Parameters relative to the set washing cycle may be displayed on the display of the control panel 14 in the step 3F, such as for example the duration of the set washing cycle.
  • the value displayed is either the "standard" value, that is, the value as stored in the memory and considered to be the default value for the set washing program, or the value of the parameter as modified by the user in step 2F.
  • the parameter displayed is the duration of the cycle, from this moment for example the countdown of the visualized value begins so at any point in time the user is aware of the remaining duration of the washing cycle watching the display of the user interface 14.
  • the weight of laundry is detected, before the water is introduced into the drum, by means of the first weight sensor 13 in step 4F.
  • the first weight value can be calculated driving the motor 11 to accelerate the drum 6 accommodating laundry to a certain speed and then measuring the torque and using a predictive algorithm.
  • the value of the first weight is used to calculate a parameter of the washing cycle, for example the parameter visualized in the display of the user interface 14, for example the duration of the washing cycle.
  • a parameter of the washing cycle for example the parameter visualized in the display of the user interface 14, for example the duration of the washing cycle.
  • the value on the display can be updated in phase 5F.
  • the visualized parameter(s) therefore may have a "sudden jump" from one value to the other, that is, from the pre-set memorized value that the set program cycle refers to in a memory of the washing machine, to a new value which is based on the first weight value.
  • the washing process begins, main water supply is executed to supply water into the drum 6 (wash water) until a target water amount for washing set according to the set washing cycle.
  • the amount of water is preferably big enough that the laundry is in contact to the water.
  • a first level of water inside the drum is reached and it is measured. However, this first water level is lowered as laundry absorbs water in the drum 6. If after a pre-determined time interval, the laundry has absorbed so much water that the difference between the new - second - water level at the end of the predetermined time interval and the first water level is above a given value considered as a threshold, water supply to additionally supply water is executed accordingly.
  • the water is not supplied any more if after the pre-determined time interval the difference between the first level and the second level water is below the selected threshold.
  • the water amount which is introduced in the laundry at the beginning preferably depends on the set washing program or cycle.
  • the washing and/or rinsing process can proceed in step 8F.
  • the parameter displayed may slowly change as the washing process proceed, for example in case of a display of the duration of the cycle, the remaining time till the end of the cycle is continuously updated in a countdown manner.
  • a pre-defined amount of water is preferably introduced into the drum 6.
  • the water level is lowered as laundry absorbs water. If after a pre-determined time interval, the laundry has absorbed so much water that the difference between a first water level at the beginning of the predetermined time interval and a second water level at the end of the predetermined time interval is above a given value considered as a threshold, water supply to additionally supply water is executed accordingly. The water is not supplied any more if after the pre-determined time interval the difference between the first and second level is below the threshold.
  • the weight of laundry is proportional to an amount of absorbing water from laundry
  • the weight of laundry may be determined according to the number of water resupplies, in each of which a known amount of water is introduced in the drum. That is, since the number of water resupplies varies according to weight of laundry, the second weight of the laundry can be calculated in a more precise manner. Alternatively, not only the number of water resupplies is used to calculate the load of the laundry, but also the time the water takes to maintain the desired water level.
  • the same parameter which has been determined using the first weight is then recalculated, for example the duration of the washing cycle.
  • the second calculation of the same parameter is totally independent from the previously obtained value of the first weight.
  • the value of the parameter of the washing cycle, not re-calculated may remain the same or may change.
  • the display is updated with the new value of the parameter, which is optimized for washing cycles in which there is a heavy load.
  • the display may show a new time duration of the cycle, and the visualized value may perform a non-continuous "jump" from the previously displayed value obtained on the basis of the first weight to a new value obtained on the basis of the second weight. This takes place in step 10F.
  • the washing and rinsing of the laundry takes place in step 11F.
  • the value of the same parameter which has been determined using the first and the second weight may also be modified by other information regarding the washing cycle or the operative condition of the washing machine 1, or by the "wished value" inputted by the user.

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

Claims (12)

  1. Procédé pour commander une machine à laver (1), cette machine à laver comprenant une cuve (5) et un tambour (6), ce tambour étant monté de manière rotative à l'intérieur de la cuve et étant adapté pour contenir du linge à laver, ce procédé comprenant :
    ∘ la sélection d'un cycle de lavage parmi une pluralité de cycles de lavage ;
    ∘ le calcul d'un premier poids du linge dans le tambour avant que de l'eau ne soit alimentée au tambour et/ou à la cuve ;
    ∘ la comparaison du premier poids avec un premier seuil (T1) ;
    ∘ si ledit premier poids est en dessous du premier seuil ou égal à celui-ci, alors ce procédé comprend en outre :
    • la détermination d'un paramètre du cycle de lavage sélectionné en se basant sur ledit premier poids ;
    • le lavage et/ou le rinçage dudit linge ;
    caractérisé en ce que
    ∘ si ledit premier poids est au-dessus du premier seuil, alors ce procédé comprend en outre :
    • l'introduction d'eau dans la cuve ;
    • et, après que l'eau a été introduite dans la cuve :
    • la vérification d'un niveau d'eau à l'intérieur du tambour ;
    • le calcul d'un deuxième poids du linge présent dans le tambour en se basant sur la quantité d'eau nécessaire pour maintenir un niveau prédéterminé d'eau dans le tambour ;
    • la détermination d'un paramètre du cycle de lavage sélectionné en se basant sur ledit deuxième poids, indépendamment du premier poids ;
    • le lavage et/ou le rinçage dudit linge.
  2. Procédé selon l'une quelconque des revendications précédentes, dans lequel la détermination d'un paramètre du cycle de lavage sélectionné en se basant sur ledit deuxième poids, indépendamment du premier poids, comprend :
    ∘ la détermination de la durée de temps du cycle de lavage sélectionné.
  3. Procédé selon l'une quelconque des revendications précédentes, dans lequel la détermination d'un paramètre du cycle de lavage sélectionné en se basant sur ledit premier poids comprend :
    ∘ la détermination de la durée de temps du cycle de lavage sélectionné.
  4. Procédé selon l'une quelconque des revendications précédentes, dans lequel la détermination d'un paramètre du cycle de lavage sélectionné en se basant sur ledit premier poids comprend :
    ∘ la détermination d'une quantité d'eau à charger dans le tambour pendant le cycle de lavage sélectionné.
  5. Procédé selon l'une quelconque des revendications précédentes, dans lequel, si ledit premier poids est en dessous du premier seuil ou égal à celui-ci, alors ce procédé comprend en outre :
    ∘ l'introduction dans le tambour d'une quantité d'eau prédéterminée ;
    ∘ l'attente pendant un intervalle de temps prédéterminé ; et
    ∘ l'arrêt de l'introduction d'eau si, après ledit intervalle de temps prédéterminé, une variation du niveau de l'eau dans les limites dudit intervalle de temps prédéterminé est en dessous d'un deuxième seuil ou égale à celui-ci.
  6. Procédé selon l'une quelconque des revendications précédentes, dans lequel, si ledit premier poids est au-dessus du premier seuil, les étapes consistant à :
    ∘ introduire de l'eau dans la cuve ;
    ∘ vérifier un niveau d'eau à l'intérieur du tambour ;
    ∘ calculer un deuxième poids du linge présent dans le tambour en se basant sur la quantité d'eau nécessaire pour maintenir le niveau d'eau dans le tambour ;
    comprennent :
    ∘ l'introduction dans le tambour d'une quantité d'eau prédéterminée ;
    ∘ l'attente pendant un intervalle de temps prédéterminé ;
    ∘ l'arrêt de l'introduction d'eau si, après ledit intervalle de temps prédéterminé, une variation du niveau de l'eau à l'intérieur dudit intervalle de temps prédéterminé est en dessous d'un troisième seuil ou égale à celui-ci ;
    ∘ le calcul d'un deuxième poids du linge présent dans le tambour en se basant sur la quantité d'eau ajoutée dans le tambour jusqu'à l'arrêt de l'introduction d'eau.
  7. Procédé selon l'une quelconque des revendications précédentes, dans lequel ladite machine à laver comprend un moteur entraînant le tambour en rotation et dans lequel le calcul d'un premier poids du linge dans le tambour avant que de l'eau ne soit alimentée au tambour et/ou à la cuve comprend :
    ∘ le calcul du premier poids en détectant un ou plusieurs paramètres du moteur tandis que le tambour tourne.
  8. Procédé selon l'une quelconque des revendications précédentes, dans lequel ladite machine à laver comprend un moteur entraînant le tambour en rotation et dans lequel le calcul d'un premier poids du linge dans le tambour avant que de l'eau ne soit alimentée au tambour et/ou à la cuve comprend :
    ∘ la détection d'une pluralité de paramètres concernant les conditions de fonctionnement de la machine à laver ; et
    ∘ la prédiction d'un poids du linge présent à l'intérieur de la machine à laver en se basant sur ladite pluralité de paramètres au moyen d'un capteur logiciel guidé par les données.
  9. Procédé selon une ou plusieurs des revendications précédentes, dans lequel la détermination d'un paramètre du cycle de lavage sélectionné en se basant sur ledit deuxième poids indépendamment du premier poids comprend une ou plusieurs des actions suivantes :
    ∘ la détermination dudit paramètre en se basant aussi sur une caractéristique du cycle de lavage sélectionné ;
    ∘ la détermination dudit paramètre en se basant aussi sur une dureté de l'eau introduite dans le lavage ;
    ∘ la détermination dudit paramètre en se basant aussi sur une quantité de saleté présente dans le linge ;
    ∘ la détermination dudit paramètre en se basant aussi sur une couleur du linge ;
    ∘ la détermination dudit paramètre en se basant aussi sur un type de textile dudit linge.
  10. Procédé selon l'une quelconque des revendications précédentes, dans lequel, si ledit premier poids est en dessous du premier seuil ou égal à celui-ci, la détermination d'un paramètre du cycle de lavage sélectionné en se basant sur ledit premier poids comprend en outre :
    ∘ la détermination d'une durée dudit cycle de lavage sélectionné en se basant sur ledit premier poids ; et
    ∘ l'affichage de ladite durée sur un afficheur.
  11. Procédé selon l'une quelconque des revendications précédentes, dans lequel, si ledit premier poids est au-dessus du premier seuil, alors ce procédé comprend en outre :
    ∘ la détermination d'un paramètre du cycle de lavage sélectionné en se basant sur ledit premier poids ; et
    ∘ la mise à jour dudit paramètre en se basant sur ledit deuxième poids, indépendamment dudit premier poids.
  12. Procédé selon la revendication 11, dans lequel, si ledit premier poids est au-dessus du premier seuil, la détermination d'un paramètre du cycle de lavage sélectionné en se basant sur ledit premier poids comprend alors :
    ∘ la détermination d'une première durée dudit cycle de lavage sélectionné en se basant sur ledit premier poids ; et
    ∘ l'affichage de ladite première durée sur un afficheur.
    et la mise à jour dudit paramètre en se basant sur ledit deuxième poids, indépendamment dudit premier poids comprend :
    ∘ la détermination d'une deuxième durée dudit cycle de lavage sélectionné en se basant sur ledit deuxième poids, indépendamment dudit premier poids ; et
    ∘ la mise à jour dudit afficheur affichant ladite deuxième durée.
EP16168537.5A 2016-05-06 2016-05-06 Procédé pour commander une machine à laver Active EP3241938B1 (fr)

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PL16168537T PL3241938T3 (pl) 2016-05-06 2016-05-06 Sposób sterowania pralką
EP16168537.5A EP3241938B1 (fr) 2016-05-06 2016-05-06 Procédé pour commander une machine à laver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16168537.5A EP3241938B1 (fr) 2016-05-06 2016-05-06 Procédé pour commander une machine à laver

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CN110344209B (zh) * 2018-04-04 2024-01-02 佛山市顺德海尔电器有限公司 一种洗衣机的控制方法及洗衣机
CN110552165B (zh) * 2018-06-04 2021-12-10 青岛海尔洗涤电器有限公司 洗衣机配重块安装结构及洗衣机
KR20210096072A (ko) 2018-12-26 2021-08-04 엘지전자 주식회사 세탁물 처리 장치 및 그의 세탁 코스 결정 방법
CN111411475A (zh) * 2019-01-04 2020-07-14 青岛海尔洗衣机有限公司 用于洗涤设备的控制方法
CN111733566A (zh) * 2019-03-19 2020-10-02 青岛海尔洗衣机有限公司 用于洗涤设备的运行时间修正方法
EP3715521A1 (fr) 2019-03-27 2020-09-30 Electrolux Appliances Aktiebolag Appareil de traitement du linge ayant une estimation sèche de la quantité de charge de linge
CN112210954B (zh) * 2019-06-25 2022-09-16 重庆海尔滚筒洗衣机有限公司 洗涤设备进水的控制方法及洗涤设备
CN112176650B (zh) * 2019-07-05 2023-12-22 青岛胶南海尔洗衣机有限公司 洗衣机控制方法、装置、洗衣机及存储介质
CN112726118B (zh) * 2019-10-11 2024-05-28 青岛海尔洗衣机有限公司 默认洗涤参数设置方法及装置
CN113493979A (zh) * 2020-03-19 2021-10-12 博西华电器（江苏）有限公司 洗涤衣物的方法、衣物处理设备、及存储介质
CN113279182A (zh) * 2021-06-03 2021-08-20 广东溢达纺织有限公司 织物加工补水方法以及补水设备
CN113417112B (zh) * 2021-07-29 2023-02-28 无锡小天鹅电器有限公司 洗涤提醒方法和装置、衣物处理设备

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