WO2014064269A1 - Procédé de commande d'un lave-linge et lave-linge - Google Patents

Procédé de commande d'un lave-linge et lave-linge Download PDF

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Publication number
WO2014064269A1
WO2014064269A1 PCT/EP2013/072437 EP2013072437W WO2014064269A1 WO 2014064269 A1 WO2014064269 A1 WO 2014064269A1 EP 2013072437 W EP2013072437 W EP 2013072437W WO 2014064269 A1 WO2014064269 A1 WO 2014064269A1
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WO
WIPO (PCT)
Prior art keywords
laundry
drum
water
detergent
phase
Prior art date
Application number
PCT/EP2013/072437
Other languages
English (en)
Inventor
Marco Mariuzzo
Martino Bondi
Terenzio Girotto
Marco Carboni
Original Assignee
Electrolux Home Products Corporation N.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electrolux Home Products Corporation N.V. filed Critical Electrolux Home Products Corporation N.V.
Publication of WO2014064269A1 publication Critical patent/WO2014064269A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • 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
    • D06F2103/26—Imbalance; Noise 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
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
    • D06F2105/48—Drum speed
    • 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
    • D06F2105/52—Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps
    • 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
    • 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 
    • D06F33/48—Preventing or reducing imbalance or noise

Definitions

  • the present invention concerns the field of laundry washing techniques.
  • the present invention refers to a method for controlling a laundry washing machine, which is configured to dissolve and recover a detergent gathered in a drainage duct of the laundry washing machine, and to a laundry washing machine implementing this method.
  • laundry washing machines both "simple” laundry washing machines (i.e. laundry washing machines which can only wash and rinse laundry) and laundry washing and drying machines (i.e. laundry washing machines which can also dry laundry), is widespread.
  • laundry washing machine will refer to both simple laundry washing machines and laundry washing and drying machines.
  • water may denote water as such, washing water, washing liquid, washing liquor or the like.
  • Laundry washing machines generally comprise an external casing provided with a washing tub which comprises a rotatable perforated drum where the laundry is placed, an electric motor which rotates the drum in the washing tub, a water-detergent supply system which supplies wash water and/or detergent into the washing tub/drum, and a water draining system which discharges/drains wash water from the washing tub.
  • the draining system typically comprise a drainage duct the mouth (or inlet) of which is defined in the bottom of the washing tub, and a drainage pump which is configured to drain the wash water from the washing tub into the drainage duct.
  • a typical laundry washing operation includes placing laundry to be washed within the drum. Thereafter, water and detergent are added by the supplying system into the washing tub to form a cleaning solution. The laundry is then subjected to various sequential phases such as: a main wash phase, a rinse phase, and a final spin phase.
  • a substantial portion of detergent in particular when using powder detergent
  • the detergent introduced at the start of wash phase drops directly through the drainage duct as detergent aggregates before it is completely dissolved in the water in washing tub. This causes the detergent to be gathered/settled into the drain space and then to be discharged without fulfilling its cleaning functions.
  • some types of laundry washing machines are provided with hydraulic valve organs, like so called “OKO-balls” (i.e. valves having a floating ball acting as closure element) or membranes, which are arranged on the inlet of the drainage duct and are structured to close the inlet of the drainage duct when liquid is supplied to the tub.
  • hydraulic valve organs like so called “OKO-balls” (i.e. valves having a floating ball acting as closure element) or membranes, which are arranged on the inlet of the drainage duct and are structured to close the inlet of the drainage duct when liquid is supplied to the tub.
  • the hydraulic valve organs in addition to increase the production costs, require a certain space to be placed, increasing the overall dimension of the machine and/or requiring a complex positioning of the other components of the machine (which makes the assembly of the machine more complex) in order to obtain enough free space for their positioning.
  • the hydraulic valve organs may easily be clogged, requiring periodical maintenance.
  • US 6,557,199 discloses a mixing system for laundry washing machine which is configured to mix the detergent into a wash solution during an initial portion of the main wash phase.
  • the system performs an intermediate spin in the wash phase wherein the drum is rotated at a high speed for the purpose of mixing and distributing the detergent in the wash solution.
  • this additional step occurs shortly after the washing machine has been filled with water for the programmed wash phase.
  • the time and drum speed associated with this additional step is established to provide sufficient mixing, while avoiding the development of excessive suds. More specifically, the drum is rotated at 70 RPM (rounds per minute) for approximately 9 seconds at about 3 minutes after the fill portion of the wash phase is completed.
  • Applicant has found that by rotating the drum, after loading water and detergent in the washing tub, at a first and a second intermediate spins having both high rotational speeds, but different rotational directions, substantially all the detergent settled in the water draining system is effectively removed, even if the water draining system comprises, at its inlet, for example, a substantially parallelepiped shaped draining sump, since the water fluxes generated by the two spins, having opposite rotational directions, guarantee effectively removing the detergent settled in both the sides/angles of the sump.
  • the first and second intermediate spins having opposite rotational directions generate a high turbulence in the washing liquid, which enhances (or favours) the melting of the detergent in the water.
  • a method for controlling a laundry washing machine comprising: a casing, a washing tub arranged within the casing, a rotatable laundry drum which is mounted inside the washing tub and is designed to contain laundry, a water-detergent supply system designed to supply wash water and detergent into the washing tub and a water draining system designed to discharge wash water from the washing tub.
  • the method performs the steps of:
  • the method is characterised by performing, during the main wash phase, the steps of:
  • the second intermediate spin is performed after the first intermediate spin.
  • wash speed lower than the high speed could be also zero (i.e. the drum may be still between the first and second intermediate spins).
  • the speed at which the first intermediate spin is performed may be equal to or different from the speed at which the second intermediate spin is performed.
  • the speed at which the first intermediate spin is performed and the speed at which the second intermediate spin is performed are advantageously both at least as high as (and preferably higher than) the speed at which, due to the rotation of the drum, a continuous liquid ring (i.e. a substantially ring-shaped flux of liquid rotating along the inner circumferential surface of the tub) is formed, circulating along the inner circumferential surface of the tub.
  • a rotating speed of around 100-150 RPM is enough for ensuring the formation of such a continuous liquid ring, practically independently on the dimensions of the diameter of the drum.
  • the speed at which the first intermediate spin is performed and the speed at which the second intermediate spin is performed are advantageously both at least as high as (and preferably higher than) the speed at which the laundry, due to the centrifugal force, is substantially completely stuck (or fixed) to the lateral walls of the drum.
  • Test performed by applicant have shown that the minimum speed at which the laundry, due to the centrifugal force, is substantially completely stuck (or fixed) to the lateral walls of the drum, depends on the diameter of the drum, and that a speed of around 100 RPM is enough for almost all the diameters currently in the market (i.e. comprised between 400 and 550 mm).
  • the method comprises:
  • the method comprises the steps of:
  • the method comprises:
  • the method comprises the steps of:
  • the high speed is comprised between about 100 and 400 RPM. This range is particularly advantageous, since tests carried out by the applicant have proved that with lower speeds there is the risk that the kinetic energy of the flux of liquid generated by the drum rotation and moving on the internal surface of the tub is not high enough for striking the detergent settled in the sump with a power high enough for ensuring the complete removal of this detergent, while higher speeds have the risk of generating high vibrations, and therefore high noise, and moreover increase too much the energy consumption of the washing cycle and reduce the life of the electric motor rotating the drum.
  • the high speed is about 150 RPM.
  • the first and second intermediate spins are performed before a heating phase of the main wash phase.
  • the present invention concerns also a laundry washing machine comprising: a casing, a washing tub arranged within the casing, a rotatable laundry drum which is mounted inside the washing tub and is designed to contain laundry, an electric motor structured to rotate the laundry drum, a water-detergent supply system designed to supply wash water and detergent into the washing tub, and a water draining system designed to discharge wash water from the washing tub;
  • the machine comprises a control unit configured to:
  • the control unit is further configured to:
  • control unit is further configured to:
  • control unit is further configured to:
  • control unit is further configured to:
  • control unit is further configured to:
  • the high speed is comprised between about 100 and 400 RPM.
  • the high spin speed is about 150 RPM.
  • FIG. 1 shows schematically a front view of a laundry washing machine implementing the control method according to the invention
  • FIG. 2 is a flow chart of the basic operations of a method for controlling the washing machine of Figure 1 ;
  • FIG. 3 is a graph which illustrates the variation of: the drum speed, water temperature, and water level, during operations performed by the control method according to the present invention
  • FIG. 4 is an enlarged portion of phase P2 of the graph shown in Figure 3 illustrating the first and second spins performed by the control method during the wash phase, according to the present invention.
  • the method of the present invention has proved to be particularly advantageous when applied to laundry washing machines, as described below. It should in any case be underlined that the present invention is not limited to this type of application. On the contrary, the present invention can be conveniently applied to other equipments, like for example laundry washing and drying machines (called also washer/driers), wherein one or more steps of introducing water inside a washing tub is required.
  • laundry washing machine 1 according to the invention is described, in which a control method of the invention is implemented.
  • the laundry washing machine 1 is a front loading laundry washing machine.
  • the present invention has proved to be particularly successful when applied to front loading laundry washing machines. It should in any case be underlined that the present invention is not limited to this type of application. On the contrary, the present invention can be usefully applied to different types of loading washing devices, for example top loading laundry washing machines or top loading laundry washing and drying machines.
  • the laundry washing machine 1 comprises an external casing or casing 2, in which a washing tub 3 is provided that contains a rotatable perforated drum 4, where the laundry 10 to be washed can be loaded.
  • the washing tub 3 and the drum 4 both have preferably a substantially cylindrical shape.
  • the casing 2 is provided with a loading/unloading door (not illustrated) which allows access to the washing tub 3 and the drum 4.
  • the washing tub 3 is preferably suspended in a floating manner inside the casing 2, advantageously by means of a number of coil springs and shock-absorbers (not illustrated).
  • the drum 4 is advantageously rotated by an electric motor 7, which preferably transmits the rotating motion to the shaft of the drum 4, advantageously by means of a belt/pulley system 8. In a different embodiment of the invention, the motor can be directly associated with the shaft of the drum 4.
  • a water supply system 5 and a detergent supply system 6 are arranged preferably in the upper part of the laundry washing machine 1 and are structured to supply water and washing/rinsing products, i.e. detergent, softener, etc., into the washing tub 3.
  • the detergent supply system 6 advantageously comprises a, preferably removable, drawer 13 provided with various compartments suited to be filled with washing and/or rinsing products.
  • the water flowing through the water supply system 5 is advantageously supplied into the washing tub 3 by making it flow through the drawer 13 and through a supply pipe 9 which extends toward the tub 3.
  • the supply pipe output of the supply pipe 9 advantageously ends in correspondence of the tub 3.
  • the supply pipe output ends in correspondence of a lateral side of the tub 3, as shown in the example of Figure 1 ; alternatively the supply pipe output of the supply pipe 9 may advantageously end in correspondence of the bellows (not illustrated) connecting the loading/unloading openings of the tub and of the casing.
  • the water supply system 5 further comprises a main pipe 15 which opportunely connects the drawer 13 to an external water supply line E, preferably by means of a controlled supply valve 11.
  • the water which reaches the washing tub 3 can selectively contain one of the products contained in the compartments of the drawer 13, or such water can be clean (i.e. without products), depending on the phase of the washing program which is actually performed; in the initial phases of the washing program, for example, the detergent is conveyed into the tub 3 by the incoming water, while in other phases, for example during the rinsing phase, only water is conveyed into the tub 3.
  • a further separate water supply pipe can be provided, which supplies exclusively clean water into the tub 3.
  • the laundry washing machine 1 further comprises a water draining system 16 which is configured to drain the wash water, i.e. dirty water or water mixed with washing and/or rinsing products, from the washing tub 3 to the outside.
  • a water draining system 16 which is configured to drain the wash water, i.e. dirty water or water mixed with washing and/or rinsing products, from the washing tub 3 to the outside.
  • the water draining system 16 advantageously comprises the bottom region of the tub 3, which is provided with a liquid outlet fluidly connected to a draining pump 19 arranged to remove liquid from the tub 3 and to take this liquid into a draining suction pipe 20 having an end fluidly connected to the draining pump 19, and the other end designed to be fluidly connected to a house draining pipe system (not illustrated).
  • the water draining system 16 advantageously comprises a draining sump 22 which may preferably be a part of the bottom region of the tub 3 (preferably made in a single-piece construction with the latter) and which is fluidily connected to the draining pump 19, and is structured so that washing liquid in the washing tub 3 is collected and drained in the sump 22 under the influence of gravity and/or, in addition, by suction exerted by the draining pump 19.
  • the laundry washing machine 1 may be advantageously provided with a one or more liquid level sensor device 25 (schematically illustrated in Figure 1), designed to sense or detect the water/liquid level inside the tub 3.
  • the sensor device 25 may preferably comprise a pressure sensor which senses the pressure in the tub 3. From the pressure values sensed by the sensor device 25 it is possible to determine the water level of the wash water contained in the tub 3.
  • the pressure sensor is fluidly connected with the draining sump 22.
  • the sensor device 25 may preferably comprise in addition to or as a replacement of the pressure sensor, a level sensor, for example mechanical, electro-mechanical, optical, etc., configured to sense or detect the water level inside the tub 3.
  • a level sensor for example mechanical, electro-mechanical, optical, etc., configured to sense or detect the water level inside the tub 3.
  • the laundry washing machine 1 may be advantageously provided with a heating device 23 designed to heat the water solution loaded in the tub 3 to a prefixed temperature.
  • the heating device 23 may comprise one or more electric resistances or similar devices arranged in the tub bottom 12 and/or in the sump 22.
  • a control unit 24 is advantageously connected to the various parts of the laundry washing machine 1 in order to ensure its operation.
  • the control unit 24 is preferably operatively connected to the electric motor 7, so that the drum speed may be controlled, the controlled supply valve 11, the draining pump 19, and receives information from the water level sensor device 25.
  • the control unit 24 is advantageously operatively connected also to an interface unit 24a (only schematically illustrated in Figure 1) which is accessible to the user and by means of which the user selects and sets the washing parameters, for example the desired washing program.
  • the washing parameters for example the desired washing program.
  • other parameters can optionally be inserted by the user, for example the washing temperature, the spinning speed, the load in terms of weight of the laundry to be washed, the type of fabric of the load, etc.
  • the interface unit 24a also preferably comprises a display where some pieces of information are opportunely displayed.
  • control unit 24a Preferably based on the parameters acquired by said interface unit 24a, the control unit
  • the laundry washing machine 1 will sequentially proceed through a main wash phase (step 300), one or more rinse phases (step 400), and one or more final spin phases (500).
  • the method for controlling the laundry washing machine 1 comprises a step 100 wherein the laundry 10 to be washed is first placed inside the drum 4; preferably a step 110 wherein a desired washing program is selected by the user; and the step 300 in which the method starts the main wash phase based on the selected washing program.
  • step 110 may be performed as well before step 100.
  • step 110 may be replaced by a step in which the machine automatically selects, for example among a set of memorized washing programs, the washing program best fittings with the specific characteristics (e.g. material, dirty degree, weight) of the loaded laundry; these characteristics which may be detected by the machine (for example by specific sensors), and/or set by the user for example by the interface unit 24a.
  • specific characteristics e.g. material, dirty degree, weight
  • the wash phase (step 300) comprise a starting water-detergent loading phase (step 120), wherein preset amounts of water and detergent/s are loaded into the tub 3 so as to get a wash solution inside the latter.
  • the control unit 24 preferably controls the supply valve 11 based on the water level sensed by the sensor device 25 so that a preset amount/level of water is reached in the tub 3.
  • the control unit 24 preferably further controls detergent supply system 6 so that a prefixed amount of detergent is loaded in the tub 3.
  • the drum 3 is rotated in order to cause the laundry 10 to tumble through the washing solution (step 130).
  • Figure 2 shows the case in which the tumbling movement is performed after the end of the detergent loading phase, but in a further embodiment the tumbling movement may be performed also during the water/detergent loading phase (in other words phases 120 and 130 may be performed contemporaneously).
  • the tumbling movement phase may be performed both during and after the water/detergent loading phase 120.
  • the tumbling movement phase may be performed before, during and after the water/detergent loading phase 120.
  • the method may preferably, although not necessarily, periodically stop the drum 4 and/or alternate the rotational direction of the drum 4 to vary the tumbling laundry pattern, in order to cause the laundry 10 to be untangled.
  • the drum 3 is made to rotate at a low wash speed, e.g. about 40-50 RPM.
  • this low wash speed is a speed lower than the speed (typically around 100 RPM) at which the liquid collected inside the tub forms a continuous liquid ring circulating along the inner surface of the tub; advantageously at this low speed the laundry loaded in the drum is not completely stuck (i.e. fixed) to the lateral surface of the drum, and therefore at least part of the laundry (depending on how much laundry is loaded) can tumble (i.e. rotate) inside the drum 3.
  • Detergent loaded in the tub 3 during the water/detergent loading phase and not completely dissolved in water tends to deposit into the tub bottom 12, and to remain accumulated in the sump 22.
  • the method sequentially performs the steps of: rotating the drum 4 at a preset high speed coss' (higher than that for a normal wash phase, which is typically e.g. 40-50 RPM) in a first rotational direction in order to perform at least one first intermediate spin; and rotating the drum at a preset high speed coss" in a second rotational direction, opposite to the first rotational direction, in order to perform at least a second intermediate spin so that the settled detergent is removed from the water draining system and mixed with the water.
  • a preset high speed coss' higher than that for a normal wash phase, which is typically e.g. 40-50 RPM
  • the high speeds coss' and coss" performed during the intermediate spins may be comprised between about 100 RPM and 400 RPM; preferably such high speeds are about 150 RPM.
  • the high speeds coss' and coss" of the two intermediate spins may be equal to each other.
  • the high speeds coss' and coss" of the two intermediate spins may be different to each other.
  • the time interval between the first and second intermediate spin is quite small, for example comprised between 10 s and 50 s (preferably 30 s), so that the effect of the turbulence due to the first intermediate spin is still present when the second intermediate spin begins; in this way the mixing effect of the washing liquid, and therefore also the melting of the detergent, is increased.
  • the method may perform one or more first intermediate spins and at least one (but also more than one) second intermediate spin.
  • the method rotates the drum 3 in order to cause the laundry 10 to tumble through the wash solution (step 170).
  • the method may preferably, although not necessarily, periodically stop the drum and/or alternate the rotational direction of the drum 4 to vary the tumble laundry pattern in order to cause the laundry 10 to be untangled as the first tumble phase.
  • the drum 3 is rotated at a low wash speed (e.g. 40-50 RPM) at which at least part of the laundry can tumble (i.e. rotate) inside the drum.
  • the drum rotation may be stopped, i.e. the wash speed could be zero.
  • the speed of the drum may have any pattern.
  • the method may advantageously perform a first unbalance check step (140) wherein it is determined whether the laundry loaded in the drum 4 is balanced or not.
  • the method rotates the drum 4 in the first rotational direction and gradually increases the rotational speed of the drum 4 from a low wash speed in which at least part of the laundry can tumble inside the drum, to a medium speed coi wherein the laundry remains attacked to the drum inner surface.
  • Medium speed coi may be about 80 RPM, or more preferably 100 rpm, so as to ensure that all the laundry is stuck to the lateral walls of the drum, and therefore its position with respect to the drum is fixed.
  • the method performs the unbalance laundry check to determine whether the laundry loaded in the drum 4 is balanced (YES output from block 140) or unbalanced (NO output from block 140).
  • the unbalance laundry check may be performed by means of known procedures such as, for example, procedure disclosed in EP2050856.
  • the unbalance laundry check of the unbalance check step may be performed in any other way.
  • the method determines that first intermediate spin may be performed in safety condition, and in consequence, further increases the drum rotating speed until the high speed coss'.
  • the method performs the first intermediate spin (step 150) (P2 in Figure 3), and the drum 4 is rotated at the high speed coss', preferably for approximately 100-150 seconds, in the first rotational direction, preferably in a clockwise rotation.
  • the method verifies whether the number of times that unbalanced condition has been detected (indicated with a counter NDL in Figure 2) is greater than a preset threshold (indicated with TH in Figure 2) (step 160).
  • the method advantageously carries out a laundry untangle step 161, i.e. a phase in which the drum is rotated at a low speed, e.g. at 40-50 RPM in order to tumble the laundry contained therein and to redistribute it inside the drum, so as to try to reduce its unbalance.
  • a laundry untangle step 161 i.e. a phase in which the drum is rotated at a low speed, e.g. at 40-50 RPM in order to tumble the laundry contained therein and to redistribute it inside the drum, so as to try to reduce its unbalance.
  • the rotational direction of the drum 4 may periodically alternated and/or the drum stopped, so as to vary the tumbling laundry pattern.
  • the first unbalance check step 140 is performed again, as above disclosed.
  • the method advantageously skips the first intermediate spin.
  • the method then performs a second tumble phase (step 170), wherein it start rotating the drum with a low wash speed at which at least part of the laundry can tumble inside the drum.
  • the method may preferably, although not necessarily, periodically alternate the rotational direction of the drum 4 and/or stop the drum 4, to vary the tumbling laundry pattern in order to cause the laundry 10 to be untangled.
  • the second tumble phase 170 preferably last from 20s to 50s, more preferably 30s, but can have substantially any duration.
  • second tumble phase 170 may be replaced by a "zero speed phase", not illustrated in enclosed drawings, in which the drum 4 is stopped, i.e. a phase in which the drum speed is zero; preferably, but not necessarily, this "zero speed phase", preferably last from 20s to 50s, more preferably 30s, but can have substantially any duration.
  • neither the second tumble phase 170 nor a "zero speed phase" is performed between the first and second intermediate spins.
  • the method After the end of the second tumble phase 170 (or, if phase 170 is replaced by a phase in which the drum speed is zero, after this "zero speed" phase) the method preferably performs a step (180) wherein the method rotates the drum 4 in the second rotational direction and gradually increases the rotational speed of the drum 4 from a low wash speed at which at least part of the laundry can tumble in the drum, to the medium speed coi.
  • a different counter can be used.
  • the method performs an unbalance laundry check to determine whether the laundry loaded in the drum 4 is balanced or unbalanced (step 180).
  • the method determines that the second intermediate spin may be performed in safety condition and, in consequence, further increases the drum rotating speed until the high speed coss". In such case, the method performs the second intermediate spin (step 190), and the drum 4 is rotated at the high speed coss", preferably for approximately 100-150 seconds, in the second rotational direction, preferably in the counter clockwise rotation.
  • a heating phase 210 is then performed.
  • a laundry untangle step 201 i.e. a phase in which the drum is rotated at a low speed, e.g. at 40-50 RPM and/or the drum is stopped, in order to tumble the laundry contained therein and
  • the second unbalance check step 180 is performed again, as above disclosed.
  • the method skips the second intermediate phase, and performs an heating phase indicated with P3 in Figure 3 (step 210) wherein the water solution is heated.
  • heating phase 210 only after first and second intermediate spins have been performed is preferred, since it allows improving the energetic efficiency of the washing cycle; in fact during the intermediate spins the washing liquid creates a washing flux which contacts the drum, the tub, and some parts of the water draining system, and therefore the liquid is cooled by these components which have typically a temperature lower than that of the heated liquid (e.g. 40-90 °C). Performing the heating phase only after these intermediate spins, therefore, allows the heated liquid to keep the temperature reached by the heating for more time, and/or to reduce its temperature more slowly.
  • the method advantageously performs in known manner a maintenance phase (step 220) wherein the drum speed is reduced to a wash speed, for example 40-50 RPM, lower than the speed (typically around 100 RPM) at which the liquid collected inside the tub forms a continuous liquid ring circulating along the inner surface of the tub.
  • a maintenance phase step 220 wherein the drum speed is reduced to a wash speed, for example 40-50 RPM, lower than the speed (typically around 100 RPM) at which the liquid collected inside the tub forms a continuous liquid ring circulating along the inner surface of the tub.
  • the end of the maintenance phase corresponds to the end of the main wash phase (step 300).
  • a spinning and draining step 330 is advantageously performed for extracting dirty washing liquid from the laundry and draining it via the water draining system 16.
  • the draining pump is preferably activated, so as to drain dirty washing liquid from the laundry and draining it via the water draining system 16.
  • first and second intermediate spins have not to be confused with the spin performed after (or in correspondence to) the end of the main wash step, and immediately before the rinsing step, for extracting from the laundry as much washing liquid as possible, in order to drain it away from the machine; first and second intermediate spins are performed during the main wash, and preferably at the beginning of the latter, immediately after the loading of water and detergent, in order to help the removal of detergent that can settle in the water draining system, and after these first and second intermediate spins the main wash step continues with other steps (e.g.
  • the method performs one or more rinses phases (step 400) and one or more final spin phases (step 500).
  • the method advantageously rotates the drum one or more times at the normal spin speeds, which may be at about 1000 RPM.
  • control method of the invention makes it possible to: increase the dissolution of detergent depositing in the draining system of a laundry washing machine; ensure that detergent gathered in opposite sides/angles of a parallelepiped shaped sump be completely removed during the washing phase; and obtain an efficient exploitation of the detergent during the washing phase, without however increasing the production cost of the machine.

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

Abstract

La présente invention concerne un procédé de commande d'un lave-linge (1), comprenant : une enveloppe (2), une cuve de lavage (3) agencée à l'intérieur de ladite enveloppe (2), un tambour de lavage rotatif (4), qui est monté à l'intérieur de la cuve de lavage (3) et est conçu pour contenir le linge (10), un système d'alimentation en eau/détergent (5, 6), acheminant l'eau de lavage et le détergent dans la cuve/tambour de lavage, et un système d'évacuation d'eau (16) déchargeant l'eau de lavage de la cuve de lavage (3). Le procédé comprend les étapes suivantes : le chargement d'eau et de détergent dans la cuve de lavage (3), la rotation du tambour (4) à une grande vitesse préétablie (ωss') dans une première direction de rotation, de façon à exécuter au moins un premier essorage intermédiaire, la réduction de la vitesse du tambour (4) à une vitesse de lavage inférieure à ladite grande vitesse (ωss'), et la rotation du tambour à une grande vitesse préétablie (ωss'') dans une seconde direction de rotation, opposée à la première direction de rotation, de façon à exécuter au moins un second essorage intermédiaire qui génère un flux de liquide éliminant le détergent déposé dans le système d'évacuation d'eau.
PCT/EP2013/072437 2012-10-26 2013-10-25 Procédé de commande d'un lave-linge et lave-linge WO2014064269A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP12007386.1A EP2725129A1 (fr) 2012-10-26 2012-10-26 Procédé de commande d'une machine à laver le linge et machine à laver le linge
EP12007386.1 2012-10-26

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WO2014064269A1 true WO2014064269A1 (fr) 2014-05-01

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US10422068B2 (en) * 2016-02-12 2019-09-24 Whirlpool Corporation Laundry treating appliance and methods of operation

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JP5896542B1 (ja) * 2014-11-21 2016-03-30 株式会社ハッピー 洗濯方法
DE112017000598T5 (de) * 2016-02-01 2018-12-13 Lg Electronics Inc. Trommelwaschmaschine und verfahren zum reinigen einer wanne derselben
US11326292B2 (en) * 2016-02-01 2022-05-10 Lg Electronics Inc. Drum washing machine and method for cleaning tub thereof
CN109477047B (zh) * 2016-04-15 2021-12-21 塞罗斯有限公司 用于处理具有固体颗粒的基材的方法和装置
KR102606118B1 (ko) * 2016-09-01 2023-11-24 엘지전자 주식회사 세탁장치의 제어방법

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US6557199B2 (en) * 2001-09-05 2003-05-06 Maytag Corporation Wash solution mixing system for clothes washing machine
US20050257576A1 (en) * 2004-05-18 2005-11-24 Matsushita Electric Industrial Co., Ltd. Drum type washing machine
EP1760181A1 (fr) * 2005-09-05 2007-03-07 LG Electronics Inc. Dispositif de contrôle et procédé pour commander l'essorage dans une machine à laver
EP2511412A2 (fr) * 2011-04-11 2012-10-17 Gottlob Stahl Wäschereimaschinenbau GmbH Machine à laver et son procédé de commande

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EP2050856B1 (fr) 2007-10-18 2016-03-30 Electrolux Home Products Corporation N.V. Lave-linge doté d'un dispositif électronique pour capter le mouvement de l'ensemble lavant suite au déséquilibre dynamique de l'ensemble tambour de lavage du linge et procédé de fonctionnement correspondant

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DE3631685A1 (de) * 1986-09-18 1988-03-24 Bauknecht Hausgeraete Trommelwaschmaschine
US6557199B2 (en) * 2001-09-05 2003-05-06 Maytag Corporation Wash solution mixing system for clothes washing machine
US20050257576A1 (en) * 2004-05-18 2005-11-24 Matsushita Electric Industrial Co., Ltd. Drum type washing machine
EP1760181A1 (fr) * 2005-09-05 2007-03-07 LG Electronics Inc. Dispositif de contrôle et procédé pour commander l'essorage dans une machine à laver
EP2511412A2 (fr) * 2011-04-11 2012-10-17 Gottlob Stahl Wäschereimaschinenbau GmbH Machine à laver et son procédé de commande

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US10422068B2 (en) * 2016-02-12 2019-09-24 Whirlpool Corporation Laundry treating appliance and methods of operation

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