EP3623514B1 - Method for operating a washing machine - Google Patents

Method for operating a washing machine Download PDF

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Publication number
EP3623514B1
EP3623514B1 EP19194107.9A EP19194107A EP3623514B1 EP 3623514 B1 EP3623514 B1 EP 3623514B1 EP 19194107 A EP19194107 A EP 19194107A EP 3623514 B1 EP3623514 B1 EP 3623514B1
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EP
European Patent Office
Prior art keywords
laundry
rinsing
drum
water
liquor
Prior art date
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Application number
EP19194107.9A
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German (de)
French (fr)
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EP3623514A1 (en
Inventor
Rainer Bicker
Markus Drücker
Magnus Kortenjann
Ralf Templin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Miele und Cie KG
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Miele und Cie KG
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Publication of EP3623514A1 publication Critical patent/EP3623514A1/en
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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
    • D06F33/38—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of rinsing
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/04—Quantity, e.g. weight or variation of weight
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/18—Washing liquid level
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/02—Water supply
    • 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
    • D06F2202/10—
    • D06F2202/12—
    • D06F2204/06—
    • D06F2204/086—

Definitions

  • the invention relates to a method for operating a washing machine.
  • washing liquor In order to remove residues of detergent or dirt from the laundry after a main wash cycle of laundry in a washing machine, a proportion of a washing liquor can be pumped out and the laundry can be spun. Any remaining washing liquor bound in the laundry can then be diluted by adding a lot of rinse water. A lot of free liquor can be used as rinsing water and the laundry can be moved through the free liquor in order to exchange the bound liquor with the free liquor. The laundry can then be spun again.
  • the object of the invention is to create an improved method for operating a washing machine.
  • laundry in a washing machine can also only be rinsed out with bound liquor.
  • the liquor remaining in the laundry can be exchanged for a specially determined amount of added rinsing water, in which case rinsing with free liquor can be dispensed with.
  • it is only possible to rinse with bound liquor as a result of which the laundry is not pulled through the free liquor and advantageously less energy is required for the washing movement.
  • the exchange between the wash liquor in the bound liquor and the added water in the bound liquor can advantageously take place more quickly than the exchange between bound liquor and free liquor, as a result of which the rinsing can be implemented in a time-saving manner.
  • the energy and water consumption can be reduced, while the washing performance can be maintained.
  • a method for operating a washing machine is presented.
  • the washing machine has a drum for receiving laundry.
  • the method has a step of determining, a step of performing and a step of reducing.
  • a quantity of rinsing water for a rinsing process of the washing machine is determined.
  • the amount of rinsing water is determined using a load of laundry in the drum, a residual liquor in the laundry at the beginning of the rinsing process and a drainage behavior of the laundry.
  • the rinsing process is carried out using the determined amount of rinsing water.
  • the amount of rinsing water is completely bound by the laundry.
  • the drum rotates.
  • the reduction step the liquor bound in the wash is reduced from residual liquor and the amount of rinsing water. To reduce, another rotary movement of the drum is performed.
  • the washing machine can be, for example, a washing machine or a combined washer-dryer.
  • the drum can be rotatably arranged in a tub.
  • the rinsing process can be understood, for example, as a predefined washing program of the washing machine.
  • the rinsing process can also include only a partial sequence of the washing program.
  • the rinsing process can be carried out, for example, in order to remove residues of detergent or dirt from the laundry after a main wash cycle.
  • the amount of rinsing water can be determined, for example, in such a way that the laundry is partially or completely saturated during rinsing.
  • the amount of rinsing water can be completely absorbed by the laundry or be bound by the laundry.
  • the liquor can be understood to mean the amount of liquid that is used in the washing machine during a wash cycle.
  • the liquor can consist, for example, of tap water with or without detergent.
  • the residual liquor can be understood to mean the liquor remaining in the laundry from a washing process preceding the rinsing process.
  • the load quantity can be the mass of laundry that is accommodated in the drum.
  • the load quantity can be detected, for example, using a weighing method or a mass inertia method.
  • the drainage behavior of the laundry can depend on the type of textile, for example.
  • the rotary movement and the further rotary movement of the drum can be, for example, a rotation, a reversal and, additionally or alternatively, a spinning of the laundry that takes place at a different speed.
  • the speed can be in a range from 50 to 1200 revolutions per minute, for example.
  • the further rotary movement can be carried out, for example, at a higher speed than the rotary movement.
  • the determination step, the implementation step and the reduction step can be repeated cyclically in order to remove the remaining liquor replaced in the laundry with rinsing water. This is advantageous for efficiently rinsing out residues of detergent or dirt that may be in the residual liquor.
  • the amount of rinsing water can be increased each time the step of determining is repeated, compared to a previous execution of the step of determining, in order to rinse the laundry.
  • the residual liquor can advantageously be rinsed out in this way. Since only bound liquor is used for rinsing, rinsing is particularly resource-saving.
  • the method can also include a step of determining.
  • the rotational speed for carrying out the rotary movement and additionally or alternatively for carrying out the further rotary movement of the drum can be determined using the load quantity and a water intake quantity.
  • the water intake quantity can relate to a washing process of the washing machine preceding the rinsing process.
  • the speed for other rotary movements of the drum can also be determined, for example a speed for a rotary movement of the drum for the washing process preceding the rinsing process.
  • the rotation of the drum can be determined based on the load on the drum, which saves energy.
  • the method includes a step of detecting the load quantity.
  • the load amount can be detected using a moment of inertia of the laundry.
  • the load can be detected based on the suction behavior of the laundry.
  • the load quantity can also be recognized additionally or alternatively by a detected mass of the laundry, for example by means of a weighing method.
  • the load quantity can be recognized, for example, in order to determine a water intake quantity for the washing process preceding the rinsing process.
  • the residual liquor is determined according to the invention using a wash load quantity from a wash operation preceding the rinsing operation and the load quantity at the start of the rinsing operation.
  • the washing load quantity and the load quantity can be determined, for example, in the detection step.
  • the residual liquor can be determined, for example, as the difference between the washing load and the load.
  • the amount of rinsing water can thereby be determined particularly precisely, as a result of which the rinsing process can be carried out in a particularly water- and energy-saving manner.
  • the method according to the invention also includes a step of detecting the dewatering behavior of the laundry.
  • the dewatering behavior of the laundry can Using a mass moment of inertia of the laundry and are additionally or alternatively detected using a torque curve of the drum. Detecting the dewatering behavior also advantageously enables a particularly precise determination of the amount of flushing water.
  • the approach presented here also creates a device that is designed to carry out, control or implement the steps of a variant of a method presented here in corresponding devices.
  • the object on which the invention is based can also be achieved quickly and efficiently by this embodiment variant of the invention in the form of a device.
  • the device can be designed to read in input signals and to determine and provide output signals using the input signals.
  • An input signal can represent, for example, a sensor signal that can be read in via an input interface of the device.
  • An output signal may represent a control signal or a data signal that may be provided at an output interface of the device.
  • the device can be designed to determine the output signals using a processing specification implemented in hardware or software.
  • the device can include a logic circuit, an integrated circuit or a software module and can be implemented as a discrete component, for example, or can be comprised of a discrete component.
  • the washing machine has a drum for accommodating laundry and an embodiment of the above device.
  • the washing machine can be designed, for example, as a washing machine or as a combined washer-dryer.
  • An unclaimed computer program product or computer program with program code which can be stored on a machine-readable carrier or storage medium such as a semiconductor memory, a hard disk memory or an optical memory, is also advantageous. If the program product or program is executed on a computer or a device, then the program product or program can be used to carry out, implement and/or control the steps of the method according to one of the embodiments described above.
  • FIG 1 shows a schematic representation of a washing machine 100 with a device 105 for operating the washing machine 100 according to an embodiment.
  • the washing machine 100 has a drum 110 for receiving laundry 115 .
  • the device 105 is designed to determine a quantity of rinsing water for a rinsing process of the washing machine 100 .
  • the amount of rinsing water is determined using a load of laundry 115 in the drum 110, a residual liquor in the laundry 115 at the start of the rinsing process and a drainage behavior of the laundry 115.
  • the device 105 is also designed to carry out the rinsing process using the determined amount of rinsing water.
  • the amount of rinsing water is completely bound by the laundry 115 .
  • the drum 110 rotates.
  • the device 105 is designed to reduce the liquor bound in the laundry 115 from residual liquor and the amount of rinsing water. A further rotational movement of the drum 110 is carried out for the reduction.
  • Rinsing the laundry 115 using the device 105 shown here only with bound liquor is advantageously energy-saving, because an exchange between bound liquor and free liquor takes longer than rinsing with a quantity of rinsing water as bound liquor, and lifting the laundry 115 from the free liquor also requires more energy.
  • the device 105 is also designed to cyclically repeat the determination of the amount of rinsing water, the execution of the rinsing process and the reduction of the liquor bound in the laundry 115 in order to replace the residual liquor in the laundry 115 with rinsing water.
  • the device 105 is also designed to increase the amount of rinsing water compared to a previously determined amount of rinsing water in order to rinse the laundry 115 each time the determination of the amount of rinsing water is repeated for a further rinsing of the laundry 115 .
  • the device 105 is designed to determine the rotational movement of the drum 110 and/or the further rotational movement of the drum 110 using the load quantity of the drum 110 and a water intake quantity.
  • the device 105 is designed to detect the load quantity of the drum 110 using a mass moment of inertia of the laundry 115 and/or a suction behavior of the laundry 115 and additionally or alternatively a detected mass of the laundry 115.
  • the device 105 is also designed to determine the residual liquor in the laundry 115 .
  • the residual liquor is determined using a wash load from a wash process preceding the rinsing process and the load at the start of the rinsing process.
  • the device 105 is also designed to determine the drainage behavior of the laundry 115 using a mass moment of inertia of the laundry 115 and/or a torque curve of the drum 110.
  • a washing process and the subsequent rinsing process in the washing machine 100 using the device 105 are described below by way of example:
  • the load quantity of the drum 110 is determined using a mass inertia method or a suction behavior of the load or a weighing function of the washing machine 100, and the water intake quantity for the washing process is determined.
  • These values are used in the control of the rinsing process by means of the device 105 for determining the parameters of the rinsing process, such as the amount of rinsing water or the speed of the drum 110, using a model.
  • a required speed profile of the drum 110 for the required residual moisture reduction in the laundry 115 for the spin cycle after the main wash is then determined on the basis of the load quantity determined and the known water intake quantity in order to reduce the bound liquor in the laundry 115 .
  • the dewatering behavior of the load in the drum 110 is observed in order to further optimize the previously defined speed profile of the drum 110, and the data obtained in this way for the further design of the rinsing cycle, i.e. for determining the amount of rinsing water and the required speed to use for the rotary movement to carry out the rinsing process and the further rotary movement to reduce the liquor in the laundry 115.
  • the drainage behavior of the laundry 115 is determined using a mass moment of inertia of the laundry 115 and/or a torque curve of the drum 110 .
  • the moment of inertia of the load ie the laundry 115 and the liquor bound in the laundry 115
  • the torque requirement or the power requirement is observed as the drainage of the laundry 115 progresses: on a speed plateau, the torque or power requirement falls as the drainage progresses.
  • the load quantity of the drum 110 is determined again using a mass inertia method. This determines the amount of water remaining in the load.
  • the aim is to determine the optimal water intake quantity for the following spin cycle from the determined values.
  • the amount of flushing water for the following flushing cycle is then determined.
  • the amount of rinsing water for the following rinsing step is determined on the basis of the load, the remaining water and the dewatering behavior. Only so much water is used that no free liquor is formed.
  • the total amount of rinse water that is added is bound in the wash 115. Then the calculated amount of rinsing water is added.
  • the addition of water to the amount of flushing water can take place via the flushing of the door sight glass or via the flooding of the washing machine 100 . If the water is introduced into the laundry 115 via the flooding, the flooding circuit must first be rinsed with fresh water. To this end, water is introduced into the tub of the washing machine 100 and the water introduced is pumped out again. After the rinsing water has been added, a washing movement, ie a rotary movement of the drum 110, is carried out for rinsing. The liquor bound in the wash 115 is then reduced. This is followed by a multiple cyclical repetition of determining the amount of rinsing water, adding rinsing water and rinsing, as well as reducing the bound liquor.
  • the amount of water in the rinsing water is increased slightly in each rinsing step of the rinsing process, ie with each repetition, in order to increase the concentration difference over the exchange process. Finally, the laundry is spun 115.
  • the power requirement for the washing movement of the drum 110 is reduced by dispensing with the free liquor and the exchange between fresh water and washing suds takes place in the bound liquor much faster than the exchange between free liquor and bound fleet.
  • the reduced spin speeds of the drum 110 in the intermediate spin cycle reduce the power requirement and the mechanical load on the washing machine 100 .
  • the time required for a rinsing cycle is reduced, so that additional cycles can be carried out to improve the rinsing effect.
  • the water is im by the reduced speeds of the drum 110 Rinse spin cycles are not driven so deeply into the laundry 115 that better final residual moisture levels can be achieved in the final spin cycle.
  • the dewatering of the laundry 115 is controlled based on the load, such as the amount and type of load, and the speed profile of the drum 110 is controlled based on the torque or power profile.
  • the dewatering of the laundry 115 is monitored using a mass inertia method and by determining the remaining amount of residual water.
  • the amount of rinsing water is determined for the following rinsing cycle in such a way that the laundry 115 is only rinsed with bound liquor.
  • FIG 2 shows a flowchart of a method 200 for operating a washing machine according to an embodiment.
  • the washing machine has a drum for receiving laundry.
  • the method 200 has a step 205 of determining, a step 210 of performing and a step 215 of reducing.
  • step 205 of determination a quantity of rinsing water for a rinsing process of the washing machine is determined.
  • the amount of rinsing water is determined using a load of laundry in the drum, a residual liquor in the laundry at the beginning of the rinsing process and a drainage behavior of the laundry.
  • the rinsing process is performed using the determined amount of rinsing water.
  • the amount of rinsing water is completely bound by the laundry.
  • the drum rotates.
  • the reduction step 215 the liquor bound in the wash is reduced from residual liquor and the amount of rinse water. To reduce, another rotary movement of the drum is performed.
  • the steps 205 of determining, 210 of carrying out 215 of the reduction are repeated cyclically multiple times.
  • the method 200 also includes a step 220 of determining.
  • a speed for performing the rotary movement and additionally or alternatively the further rotary movement of the drum is determined using the load quantity and a water intake quantity.
  • the step 220 of determining is performed before the step 210 of performing and/or before the step 215 of reducing.
  • the method also includes a step 225 of recognition.
  • the load quantity is detected using a mass moment of inertia of the laundry and/or a suction behavior of the laundry and/or a detected mass of the laundry.
  • the step 225 of recognizing is optionally performed before the step 205 of determining.
  • the method 200 includes a step 230 of detecting.
  • step 230 of detection the drainage behavior of the laundry is detected using a mass moment of inertia of the laundry and/or a torque profile of the drum.
  • step 230 of detecting is performed before step 205 of determining.
  • an embodiment includes an "and/or" link between a first feature and a second feature, this should be read in such a way that the embodiment according to one embodiment includes both the first feature and the second feature and according to a further embodiment either only that having the first feature or only the second feature.

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

Description

Die Erfindung betrifft ein Verfahren zum Betreiben einer Waschmaschine.The invention relates to a method for operating a washing machine.

Um nach einem Hauptwaschgang von Wäsche in einer Waschmaschine Rückstände von Waschmittel oder Schmutz aus der Wäsche zu entfernen, kann ein Anteil einer Waschflotte abgepumpt werden und kann die Wäsche geschleudert werden. Anschließend kann eine verbliebene, in der Wäsche gebundene Waschflotte durch die Zugabe von viel Spülwasser verdünnt werden. Dabei kann viel freie Flotte als Spülwasser eingesetzt werden und die Wäsche kann durch die freie Flotte bewegt werden, um die gebundene Flotte mit der freien Flotte auszutauschen. Danach kann die Wäsche erneut geschleudert werden.In order to remove residues of detergent or dirt from the laundry after a main wash cycle of laundry in a washing machine, a proportion of a washing liquor can be pumped out and the laundry can be spun. Any remaining washing liquor bound in the laundry can then be diluted by adding a lot of rinse water. A lot of free liquor can be used as rinsing water and the laundry can be moved through the free liquor in order to exchange the bound liquor with the free liquor. The laundry can then be spun again.

Gattungsgemäße Verfahren sind beschrieben in der GB 2 303 642 A , DE 39 00 826 A1 , US 2012/060299 A1 und der EP 3 363 942 A1 .Generic methods are described in the GB 2 303 642 A , DE 39 00 826 A1 , U.S. 2012/060299 A1 and the EP 3 363 942 A1 .

Der Erfindung stellt sich die Aufgabe, ein verbessertes Verfahren zum Betreiben einer Waschmaschine zu schaffen.The object of the invention is to create an improved method for operating a washing machine.

Erfindungsgemäß wird diese Aufgabe durch ein Verfahren zum Betreiben einer Waschmaschine mit den Schritten bzw. Merkmalen des Hauptanspruchs gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den nachfolgenden Unteransprüchen.According to the invention, this object is achieved by a method for operating a washing machine with the steps and features of the main claim. Advantageous refinements and developments of the invention result from the following dependent claims.

Die mit der Erfindung erreichbaren Vorteile bestehen darin, dass Wäsche in einer Waschmaschine auch lediglich mit gebundener Flotte ausgespült werden kann. Dazu kann ein Austausch von in der Wäsche verbleibender Flotte mit einer eigens ermittelten Menge von zugegebenen Spülwasser erfolgen, wobei auf das Spülen mit freier Flotte verzichtet werden kann. Hierbei kann lediglich mit gebundener Flotte gespült werden, wodurch die Wäsche nicht durch die freie Flotte gezogen wird und vorteilhafterweise weniger Energie für die Waschbewegung benötigt wird. Zudem kann der Austausch zwischen Waschlauge in der gebundenen Flotte und dem zugegebenen Wasser in der gebundenen Flotte vorteilhafterweise schneller erfolgen als der Austausch zwischen gebundener Flotte und freier Flotte, wodurch das Spülen zeitsparend umgesetzt werden kann. Vorteilhafterweise kann auf diese Weise der Energie- und Wasserverbrauch gesenkt werden, wobei die Waschleistung erhalten werden kann.The advantages that can be achieved with the invention are that laundry in a washing machine can also only be rinsed out with bound liquor. For this purpose, the liquor remaining in the laundry can be exchanged for a specially determined amount of added rinsing water, in which case rinsing with free liquor can be dispensed with. In this case, it is only possible to rinse with bound liquor, as a result of which the laundry is not pulled through the free liquor and advantageously less energy is required for the washing movement. In addition, the exchange between the wash liquor in the bound liquor and the added water in the bound liquor can advantageously take place more quickly than the exchange between bound liquor and free liquor, as a result of which the rinsing can be implemented in a time-saving manner. Advantageously, in this way the energy and water consumption can be reduced, while the washing performance can be maintained.

Es wird ein Verfahren zum Betreiben einer Waschmaschine vorgestellt. Die Waschmaschine weist eine Trommel zum Aufnehmen von Wäsche auf. Das Verfahren weist einen Schritt des Ermittelns, einen Schritt des Durchführens und einen Schritt des Reduzierens auf. Im Schritt des Ermittelns wird eine Spülwassermenge für einen Spülvorgang der Waschmaschine ermittelt. Die Spülwassermenge wird unter Verwendung einer Beladungsmenge an Wäsche in der Trommel, einer Restflotte in der Wäsche zu Beginn des Spülvorgangs und eines Entwässerungsverhaltens der Wäsche ermittelt. Im Schritt des Durchführens wird der Spülvorgang unter Verwendung der ermittelten Spülwassermenge durchgeführt. Dabei ist die Spülwassermenge vollständig durch die Wäsche gebunden. Während des Spülvorgangs wird eine Drehbewegung der Trommel ausgeführt. Im Schritt des Reduzierens wird die in der Wäsche gebundene Flotte aus Restflotte und Spülwassermenge reduziert. Zum Reduzieren wird eine weitere Drehbewegung der Trommel ausgeführt.A method for operating a washing machine is presented. The washing machine has a drum for receiving laundry. The method has a step of determining, a step of performing and a step of reducing. In the determination step, a quantity of rinsing water for a rinsing process of the washing machine is determined. The amount of rinsing water is determined using a load of laundry in the drum, a residual liquor in the laundry at the beginning of the rinsing process and a drainage behavior of the laundry. In the carrying out step, the rinsing process is carried out using the determined amount of rinsing water. The amount of rinsing water is completely bound by the laundry. During the rinsing process, the drum rotates. In the reduction step, the liquor bound in the wash is reduced from residual liquor and the amount of rinsing water. To reduce, another rotary movement of the drum is performed.

Bei der Waschmaschine kann es sich beispielsweise um einen Waschautomaten oder um ein kombiniertes Waschtrockengerät handeln. Die Trommel kann drehbar in einem Laugenbehälter angeordnet sein. Unter dem Spülvorgang kann beispielsweise ein vordefiniertes Waschprogramm der Waschmaschine verstanden werden. Der Spülvorgang kann auch nur einen Teilablauf des Waschprogramms umfassen. Der Spülvorgang kann beispielsweise ausgeführt werden, um nach einem Hauptwaschgang Rückstände von Waschmittel oder Schmutz aus der Wäsche zu entfernen. Die Spülwassermenge kann beispielsweise so ermittelt werden, dass die Wäsche beim Spülen teilweise oder vollständig gesättigt ist. Die Spülwassermenge kann dabei vollständig von der Wäsche aufgenommen werden bzw. durch die Wäsche gebunden sein. Unter der Flotte kann die Menge an Flüssigkeit verstanden werden, die während eines Waschvorgangs in der Waschmaschine verwendet wird. Die Flotte kann beispielsweise aus Leitungswasser mit oder ohne Waschmittel bestehen. Unter der Restflotte kann die aus einem dem Spülvorgang vorhergehenden Waschvorgang in der Wäsche verbliebene Flotte verstanden werden. Bei der Beladungsmenge kann es sich um die Masse an Wäsche, die in der Trommel aufgenommen ist, handeln. Die Beladungsmenge kann beispielsweise mittels eines Wiegeverfahrens oder eines Massenträgheitsverfahrens erfasst werden. Das Entwässerungsverhalten der Wäsche kann beispielsweise von der Textilart abhängig sein. Die Drehbewegung und die weitere Drehbewegung der Trommel können beispielsweise ein Drehen, ein Reversieren und zusätzlich oder alternativ ein Schleudern der Wäsche sein, dass mit einer unterschiedlichen Drehzahl erfolgt. Die Drehzahl kann beispielsweise in einem Bereich von 50 bis 1200 Umdrehungen pro Minute liegen. Zum Reduzieren der in der Wäsche gebundenen Flotte kann die weitere Drehbewegung beispielsweise mit einer höheren Drehzahl ausgeführt werden als die Drehbewegung.The washing machine can be, for example, a washing machine or a combined washer-dryer. The drum can be rotatably arranged in a tub. The rinsing process can be understood, for example, as a predefined washing program of the washing machine. The rinsing process can also include only a partial sequence of the washing program. The rinsing process can be carried out, for example, in order to remove residues of detergent or dirt from the laundry after a main wash cycle. The amount of rinsing water can be determined, for example, in such a way that the laundry is partially or completely saturated during rinsing. The amount of rinsing water can be completely absorbed by the laundry or be bound by the laundry. The liquor can be understood to mean the amount of liquid that is used in the washing machine during a wash cycle. The liquor can consist, for example, of tap water with or without detergent. The residual liquor can be understood to mean the liquor remaining in the laundry from a washing process preceding the rinsing process. The load quantity can be the mass of laundry that is accommodated in the drum. The load quantity can be detected, for example, using a weighing method or a mass inertia method. The drainage behavior of the laundry can depend on the type of textile, for example. The rotary movement and the further rotary movement of the drum can be, for example, a rotation, a reversal and, additionally or alternatively, a spinning of the laundry that takes place at a different speed. The speed can be in a range from 50 to 1200 revolutions per minute, for example. To reduce the liquor bound in the laundry, the further rotary movement can be carried out, for example, at a higher speed than the rotary movement.

Gemäß einer Ausführungsform können der Schritt des Ermittelns, der Schritt des Durchführens und der Schritt des Reduzierens zyklisch wiederholt werden, um die Restflotte in der Wäsche durch Spülwasser auszutauschen. Dies ist vorteilhaft, um Rückstände von Waschmittel oder Schmutz, die sich in der Restflotte befinden können, effizient auszuspülen.According to one embodiment, the determination step, the implementation step and the reduction step can be repeated cyclically in order to remove the remaining liquor replaced in the laundry with rinsing water. This is advantageous for efficiently rinsing out residues of detergent or dirt that may be in the residual liquor.

Zudem kann gemäß einer Ausführungsform bei jedem Wiederholen des Schritts des Ermittelns die Spülwassermenge gegenüber einem vorhergehenden Ausführen des Schritts des Ermittelns erhöht werden, um die Wäsche zu spülen. Vorteilhafterweise kann die Restflotte auf diese Weise ausgespült werden. Da nur mit gebundener Flotte gespült wird, ist das Spülen besonders ressourcenschonend.In addition, according to one embodiment, the amount of rinsing water can be increased each time the step of determining is repeated, compared to a previous execution of the step of determining, in order to rinse the laundry. The residual liquor can advantageously be rinsed out in this way. Since only bound liquor is used for rinsing, rinsing is particularly resource-saving.

Das Verfahren kann gemäß einer Ausführungsform auch einen Schritt des Bestimmens umfassen. Im Schritt des Bestimmens kann die Drehzahl zum Ausführen der Drehbewegung und zusätzlich oder alternativ zum Ausführen der weiteren Drehbewegung der Trommel unter Verwendung der Beladungsmenge und einer Wasserzulaufmenge bestimmt werden. Die Wasserzulaufmenge kann einen dem Spülvorgang vorangehenden Waschvorgang der Waschmaschine betreffen. Im Schritt des Bestimmens kann auch die Drehzahl für andere Drehbewegungen der Trommel bestimm werden, beispielsweise eine Drehzahl für eine Drehbewegung der Trommel für den dem Spülvorgang vorausgehenden Waschvorgang. Vorteilhafterweise kann die Drehbewegung der Trommel so anhand der Beladung der Trommel bestimmt werden, was energiesparend ist.According to one embodiment, the method can also include a step of determining. In the determination step, the rotational speed for carrying out the rotary movement and additionally or alternatively for carrying out the further rotary movement of the drum can be determined using the load quantity and a water intake quantity. The water intake quantity can relate to a washing process of the washing machine preceding the rinsing process. In the determination step, the speed for other rotary movements of the drum can also be determined, for example a speed for a rotary movement of the drum for the washing process preceding the rinsing process. Advantageously, the rotation of the drum can be determined based on the load on the drum, which saves energy.

Das Verfahren umfasst erfindungsgemäß einen Schritt des Erkennens der Beladungsmenge. Die Beladungsmenge kann unter Verwendung eines Massenträgheitsmoments der Wäsche erkannt werden. Zusätzlich oder alternativ kann die Beladungsmenge anhand eines Saugverhaltens der Wäsche erkannt werden. Zudem kann die Beladungsmenge auch zusätzlich oder alternativ durch eine erfasste Masse der Wäsche erkannt werden, beispielsweise mittels eines Wiegeverfahrens. Die Beladungsmenge kann beispielsweise erkannt werden, um eine Wasserzulaufmenge für den dem Spülvorgang vorangehenden Waschvorgang zu bestimmen.According to the invention, the method includes a step of detecting the load quantity. The load amount can be detected using a moment of inertia of the laundry. In addition or as an alternative, the load can be detected based on the suction behavior of the laundry. In addition, the load quantity can also be recognized additionally or alternatively by a detected mass of the laundry, for example by means of a weighing method. The load quantity can be recognized, for example, in order to determine a water intake quantity for the washing process preceding the rinsing process.

Im Schritt des Ermittelns wird erfindungsgemäß unter Verwendung einer Waschbeladungsmenge von einem dem Spülvorgang vorhergehenden Waschvorgang und der Beladungsmenge zu Beginn des Spülvorgangs die Restflotte ermittelt. Die Waschbeladungsmenge und die Beladungsmenge können beispielsweise im Schritt des Erkennens ermittelt werden. Die Restflotte kann beispielsweise als Differenz zwischen der Waschbeladungsmenge und der Beladungsmenge ermittelt werden. Vorteilhafterweise kann die Spülwassermenge dadurch besonders exakt ermittelt werden, wodurch der Spülvorgang besonders wasser- und energiesparend durchgeführt werden kann.In the determination step, the residual liquor is determined according to the invention using a wash load quantity from a wash operation preceding the rinsing operation and the load quantity at the start of the rinsing operation. The washing load quantity and the load quantity can be determined, for example, in the detection step. The residual liquor can be determined, for example, as the difference between the washing load and the load. Advantageously, the amount of rinsing water can thereby be determined particularly precisely, as a result of which the rinsing process can be carried out in a particularly water- and energy-saving manner.

Außerdem umfasst das Verfahren erfindungsgemäß auch einen Schritt des Erfassens des Entwässerungsverhaltens der Wäsche. Das Entwässerungsverhalten der Wäsche kann unter Verwendung eines Massenträgheitsmoments der Wäsche und zusätzlich oder alternativ unter Verwendung eines Drehmomentverlaufs der Trommel erfasst werden. Auch ein Erfassen des Entwässerungsverhaltens ermöglicht vorteilhafterweise eine besonders exakte Ermittlung der Spülwassermenge.In addition, the method according to the invention also includes a step of detecting the dewatering behavior of the laundry. The dewatering behavior of the laundry can Using a mass moment of inertia of the laundry and are additionally or alternatively detected using a torque curve of the drum. Detecting the dewatering behavior also advantageously enables a particularly precise determination of the amount of flushing water.

Der hier vorgestellte Ansatz schafft ferner eine nicht beanspruchte Vorrichtung, die ausgebildet ist, um die Schritte einer Variante eines hier vorgestellten Verfahrens in entsprechenden Einrichtungen durchzuführen, anzusteuern bzw. umzusetzen. Auch durch diese Ausführungsvariante der Erfindung in Form einer Vorrichtung kann die der Erfindung zugrunde liegende Aufgabe schnell und effizient gelöst werden.The approach presented here also creates a device that is designed to carry out, control or implement the steps of a variant of a method presented here in corresponding devices. The object on which the invention is based can also be achieved quickly and efficiently by this embodiment variant of the invention in the form of a device.

Die Vorrichtung kann ausgebildet sein, um Eingangssignale einzulesen und unter Verwendung der Eingangssignale Ausgangssignale zu bestimmen und bereitzustellen. Ein Eingangssignal kann beispielsweise ein über eine Eingangsschnittstelle der Vorrichtung einlesbares Sensorsignal darstellen. Ein Ausgangssignal kann ein Steuersignal oder ein Datensignal darstellen, das an einer Ausgangsschnittstelle der Vorrichtung bereitgestellt werden kann. Die Vorrichtung kann ausgebildet sein, um die Ausgangssignale unter Verwendung einer in Hardware oder Software umgesetzten Verarbeitungsvorschrift zu bestimmen. Beispielsweise kann die Vorrichtung dazu eine Logikschaltung, einen integrierten Schaltkreis oder ein Softwaremodul umfassen und beispielsweise als ein diskretes Bauelement realisiert sein oder von einem diskreten Bauelement umfasst sein.The device can be designed to read in input signals and to determine and provide output signals using the input signals. An input signal can represent, for example, a sensor signal that can be read in via an input interface of the device. An output signal may represent a control signal or a data signal that may be provided at an output interface of the device. The device can be designed to determine the output signals using a processing specification implemented in hardware or software. For example, the device can include a logic circuit, an integrated circuit or a software module and can be implemented as a discrete component, for example, or can be comprised of a discrete component.

Mit diesem Ansatz wird zudem eine nicht beanspruchte Waschmaschine vorgestellt. Die Waschmaschine weist eine Trommel zum Aufnehmen von Wäsche und eine Ausführungsform der vorstehend genannten Vorrichtung auf. Die Waschmaschine kann beispielsweise als Waschautomat oder als kombiniertes Waschtrockengerät ausgeführt sein.With this approach, an unstressed washing machine is also presented. The washing machine has a drum for accommodating laundry and an embodiment of the above device. The washing machine can be designed, for example, as a washing machine or as a combined washer-dryer.

Von Vorteil ist auch ein nicht beanspruchtes Computer-Programmprodukt oder Computerprogramm mit Programmcode, der auf einem maschinenlesbaren Träger oder Speichermedium wie einem Halbleiterspeicher, einem Festplattenspeicher oder einem optischen Speicher gespeichert sein kann. Wird das Programmprodukt oder Programm auf einem Computer oder einer Vorrichtung ausgeführt, so kann das Programmprodukt oder Programm zur Durchführung, Umsetzung undloder Ansteuerung der Schritte des Verfahrens nach einer der vorstehend beschriebenen Ausführungsformen verwendet werden.An unclaimed computer program product or computer program with program code, which can be stored on a machine-readable carrier or storage medium such as a semiconductor memory, a hard disk memory or an optical memory, is also advantageous. If the program product or program is executed on a computer or a device, then the program product or program can be used to carry out, implement and/or control the steps of the method according to one of the embodiments described above.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen rein schematisch dargestellt und wird nachfolgend näher beschrieben. Es zeigt

Figur 1
eine schematische Darstellung einer Waschmaschine mit einer Vorrichtung zum Betreiben der Waschmaschine gemäß einem Ausführungsbeispiel; und
Figur 2
ein Ablaufdiagramm eines Verfahrens zum Betreiben einer Waschmaschine gemäß einem Ausführungsbeispiel.
An embodiment of the invention is shown purely schematically in the drawings and is described in more detail below. It shows
figure 1
a schematic representation of a washing machine with a device for operating the washing machine according to an embodiment; and
figure 2
a flowchart of a method for operating a washing machine according to an embodiment.

In der nachfolgenden Beschreibung günstiger Ausführungsbeispiele des vorliegenden Ansatzes werden für die in den verschiedenen Figuren dargestellten und ähnlich wirkenden Elemente gleiche oder ähnliche Bezugszeichen verwendet, wobei auf eine wiederholte Beschreibung dieser Elemente verzichtet wird.In the following description of favorable exemplary embodiments of the present approach, the same or similar reference symbols are used for the elements which are shown in the various figures and have a similar effect, with a repeated description of these elements being dispensed with.

Figur 1 zeigt eine schematische Darstellung einer Waschmaschine 100 mit einer Vorrichtung 105 zum Betreiben der Waschmaschine 100 gemäß einem Ausführungsbeispiel. Die Waschmaschine 100 weist eine Trommel 110 zum Aufnehmen von Wäsche 115 auf. Die Vorrichtung 105 ist ausgebildet, für einen Spülvorgang der Waschmaschine 100 eine Spülwassermenge zu ermitteln. Die Spülwassermenge wird unter Verwendung einer Beladungsmenge an Wäsche 115 in der Trommel 110, einer Restflotte in der Wäsche 115 zu Beginn des Spülvorgangs und eines Entwässerungsverhaltens der Wäsche 115 ermittelt. Die Vorrichtung 105 ist auch ausgebildet, unter Verwendung der ermittelten Spülwassermenge den Spülvorgang durchzuführen. Die Spülwassermenge ist dabei vollständig durch die Wäsche 115 gebunden. Während des Spülvorgangs wird eine Drehbewegung der Trommel 110 ausgeführt. Zudem ist die Vorrichtung 105 ausgebildet, die in der Wäsche 115 gebundene Flotte aus Restflotte und Spülwassermenge zu reduzieren. Zum Reduzieren wird eine weitere Drehbewegung der Trommel 110 ausgeführt. figure 1 shows a schematic representation of a washing machine 100 with a device 105 for operating the washing machine 100 according to an embodiment. The washing machine 100 has a drum 110 for receiving laundry 115 . The device 105 is designed to determine a quantity of rinsing water for a rinsing process of the washing machine 100 . The amount of rinsing water is determined using a load of laundry 115 in the drum 110, a residual liquor in the laundry 115 at the start of the rinsing process and a drainage behavior of the laundry 115. The device 105 is also designed to carry out the rinsing process using the determined amount of rinsing water. The amount of rinsing water is completely bound by the laundry 115 . During the rinsing process, the drum 110 rotates. In addition, the device 105 is designed to reduce the liquor bound in the laundry 115 from residual liquor and the amount of rinsing water. A further rotational movement of the drum 110 is carried out for the reduction.

Ein Spülen der Wäsche 115 mittels der hier gezeigten Vorrichtung 105 nur mit gebundener Flotte ist vorteilhafterweise energiesparend, denn ein Austausch zwischen gebundener Flotte und freier Flotte dauert länger als ein Spülen mit einer Spülwassermenge als gebundene Flotte, und ein Heben der Wäsche 115 aus der freien Flotte benötigt zudem mehr Energie.Rinsing the laundry 115 using the device 105 shown here only with bound liquor is advantageously energy-saving, because an exchange between bound liquor and free liquor takes longer than rinsing with a quantity of rinsing water as bound liquor, and lifting the laundry 115 from the free liquor also requires more energy.

Gemäß einem Ausführungsbeispiel ist die Vorrichtung 105 auch ausgebildet, das Ermitteln der Spülwassermenge, das Durchführen des Spülvorgangs und das Reduzieren der in der Wäsche 115 gebundenen Flotte zyklisch zu wiederholen, um die Restflotte in der Wäsche 115 durch Spülwasser auszutauschen.According to one exemplary embodiment, the device 105 is also designed to cyclically repeat the determination of the amount of rinsing water, the execution of the rinsing process and the reduction of the liquor bound in the laundry 115 in order to replace the residual liquor in the laundry 115 with rinsing water.

Auch ist die Vorrichtung 105 gemäß einem Ausführungsbeispiel dazu ausgebildet, bei jedem Wiederholen des Ermittelns der Spülwassermenge für ein weiteres Spülen der Wäsche 115 die Spülwassermenge gegenüber einer vorhergehend ermittelten Spülwassermenge zu erhöhen, um die Wäsche 115 zu spülen.According to one exemplary embodiment, the device 105 is also designed to increase the amount of rinsing water compared to a previously determined amount of rinsing water in order to rinse the laundry 115 each time the determination of the amount of rinsing water is repeated for a further rinsing of the laundry 115 .

Unter Verwendung der Beladungsmenge der Trommel 110 und einer Wasserzulaufmenge ist die Vorrichtung 105 gemäß einem Ausführungsbeispiel ausgebildet, die Drehbewegung der Trommel 110 undloder die weitere Drehbewegung der Trommel 110 zu bestimmen.According to one exemplary embodiment, the device 105 is designed to determine the rotational movement of the drum 110 and/or the further rotational movement of the drum 110 using the load quantity of the drum 110 and a water intake quantity.

Zudem ist die Vorrichtung 105 gemäß einem Ausführungsbeispiel dazu ausgebildet, die Beladungsmenge der Trommel 110 unter Verwendung eines Massenträgheitsmoments der Wäsche 115 undloder eines Saugverhaltens der Wäsche 115 und zusätzlich oder alternativ einer erfassten Masse der Wäsche 115 zu erkennen.In addition, according to one embodiment, the device 105 is designed to detect the load quantity of the drum 110 using a mass moment of inertia of the laundry 115 and/or a suction behavior of the laundry 115 and additionally or alternatively a detected mass of the laundry 115.

Die Vorrichtung 105 ist gemäß einem Ausführungsbeispiel auch ausgebildet, die Restflotte in der Wäsche 115 zu ermitteln. Die Restflotte wird unter Verwendung einer Waschbeladungsmenge von einem dem Spülvorgang vorhergehenden Waschvorgang und der Beladungsmenge zu Beginn des Spülvorgangs ermittelt.According to one exemplary embodiment, the device 105 is also designed to determine the residual liquor in the laundry 115 . The residual liquor is determined using a wash load from a wash process preceding the rinsing process and the load at the start of the rinsing process.

Optional ist die Vorrichtung 105 zudem dazu ausgebildet, das Entwässerungsverhalten der Wäsche 115 unter Verwendung eines Massenträgheitsmoments der Wäsche 115 undloder eines Drehmomentverlaufs der Trommel 110 zu ermitteln.Optionally, the device 105 is also designed to determine the drainage behavior of the laundry 115 using a mass moment of inertia of the laundry 115 and/or a torque curve of the drum 110.

Im Folgenden sind beispielhaft ein Waschvorgang und der daran anschließende Spülvorgang in der Waschmaschine 100 unter Verwendung der Vorrichtung 105 beschrieben: Zunächst werden Informationen über die Beladung der Trommel 110 für den Waschvorgang gesammelt. Dazu wird die Beladungsmenge der Trommel 110 gemäß einem Ausführungsbeispiel mittels eines Massenträgheitsverfahren oder eines Saugverhaltens der Beladung oder einer Waagefunktion der Waschmaschine 100 bestimmt, und es wird die Wasserzulaufmenge für den Waschvorgang ermittelt. Diese Werte werden in der Steuerung des Spülvorgangs mittels der Vorrichtung 105 für das Ermitteln der Parameter des Spülvorgangs, wie die Spülwassermenge oder die Drehzahl der Trommel 110, anhand eines Modells verwendet. Anschließend wird anhand der ermittelten Beladungsmenge und der bekannten Wasserzulaufmenge ein erforderliches Drehzahlprofil der Trommel 110 für die erforderliche Restfeuchtereduzierung der Wäsche 115 für den Schleudergang nach der Hauptwäsche ermittelt, um die gebundene Flotte in der Wäsche 115 zu reduzieren. Bei einem Schleudervorgang nach der Hauptwäsche wird das Entwässerungsverhalten der Beladung der Trommel 110 beobachtet, um das vorher festgelegte Drehzahlprofil der Trommel 110 nochmals zu optimieren, und die so gewonnen Daten für die weitere Auslegung des Spülvorgangs, also für das Ermitteln der Spülwassermenge und der erforderlichen Drehzahl für die Drehbewegung zum Durchführen der Spülvorgangs und die weitere Drehbewegung zum Reduzieren der Flotte in der Wäsche 115 zu nutzen.A washing process and the subsequent rinsing process in the washing machine 100 using the device 105 are described below by way of example: First, information about the loading of the drum 110 for the washing process is collected. For this purpose, according to one exemplary embodiment, the load quantity of the drum 110 is determined using a mass inertia method or a suction behavior of the load or a weighing function of the washing machine 100, and the water intake quantity for the washing process is determined. These values are used in the control of the rinsing process by means of the device 105 for determining the parameters of the rinsing process, such as the amount of rinsing water or the speed of the drum 110, using a model. A required speed profile of the drum 110 for the required residual moisture reduction in the laundry 115 for the spin cycle after the main wash is then determined on the basis of the load quantity determined and the known water intake quantity in order to reduce the bound liquor in the laundry 115 . During a spin cycle after the main wash, the dewatering behavior of the load in the drum 110 is observed in order to further optimize the previously defined speed profile of the drum 110, and the data obtained in this way for the further design of the rinsing cycle, i.e. for determining the amount of rinsing water and the required speed to use for the rotary movement to carry out the rinsing process and the further rotary movement to reduce the liquor in the laundry 115.

Das Entwässerungsverhalten der Wäsche 115 wird gemäß einem Ausführungsbeispiel unter Verwendung eines Massenträgheitsmoments der Wäsche 115 undloder eines Drehmomentverlaufs der Trommel 110 ermittelt. In Beschleunigungsphasen der Drehbewegung der Trommel 110 kann über ein Massenträgheitsverfahren das Massenträgheitsmoment der Beladung, also der Wäsche 115 und der in der Wäsche 115 gebundenen Flotte, bestimmt werden. Eine Differenz zwischen der am Beginn des Waschvorgangs und in der aktuellen Messung ermittelten Beladung entspricht der Wassermenge in der Beladung. Zum Ermitteln des Entwässerungsverhaltens mittels des Drehmomentverlaufs der Trommel 110 wird der Drehmomentbedarf oder der Leistungsbedarf mit der fortschreitenden Entwässerung der Wäsche 115 beobachtet: Auf einem Drehzahlplateau fällt der Drehmoment- bzw. Leistungsbedarf mit der fortschreitenden Entwässerung. Fällt die Änderung des Drehmoment- bzw. Leistungsverlaufs unter eine Grenze, so wird das Drehzahlplateau beendet, da die optimale Entwässerung auf diesem Plateau erreicht wurde. Am Ende des Schleuderns nach der Hauptwäsche wird nochmal über ein Massenträgheitsverfahren die Beladungsmenge der Trommel 110 bestimmt. Hiermit wird die verbliebene Wassermenge in der Beladung bestimmt. Ziel ist es, aus den ermittelten Werten die optimale Wasserzulaufmenge für den folgenden Schleudergang zu bestimmen. Anschließend wird die Spülwassermenge für den folgenden Spülgang ermittelt. Anhand der Beladungsmenge, des verbliebenen Wassers und des Entwässerungsverhaltens wird die Spülwassermenge für den folgenden Spülschritt festgelegt. Dabei wird nur so viel Wasser eingesetzt, dass sich keine freie Flotte bildet. Die gesamte Spülwassermenge, die zugegeben wird, wird in der Wäsche 115 gebunden. Danach wird die ermittelte Spülwassermenge zugegeben. Die Wasserzugabe der Spülwassermenge kann über die Türschauglas-Bespülung oder über die Umflutung der Waschmaschine 100 erfolgen. Wird das Wasser über die Umflutung in die Wäsche 115 eingebracht, so ist vorher der Umflutkreislauf mit Frischwasser zu spülen. Dazu wird Wasser in den Laugenbehälter der Waschmaschine 100 eingeleitet, und das eingeleitete Wasser wird wieder abgepumpt. Nach der Spülwasserzugabe wird zum Spülen eine Waschbewegung, also eine Drehbewegung der Trommel 110 ausgeführt. Anschließend wird die in der Wäsche 115 gebundene Flotte reduziert. Es folgt ein mehrfaches zyklisches Wiederholen des Ermittelns der Spülwassermenge, der Spülwasserzugabe und des Spülens sowie des Reduzierens der gebundenen Flotte. Dabei wird gemäß einem Ausführungsbeispiel in jedem Spülschritt des Spülvorgangs, also bei jeder Wiederholung, die Wassermenge des Spülwassers leicht erhöht, um die Konzentrationsdifferenz über den Austauschprozess zu vergrößern. Zum Schluss erfolgt das Endschleudern der Wäsche 115.According to one exemplary embodiment, the drainage behavior of the laundry 115 is determined using a mass moment of inertia of the laundry 115 and/or a torque curve of the drum 110 . In acceleration phases of the rotary movement of the drum 110, the moment of inertia of the load, ie the laundry 115 and the liquor bound in the laundry 115, can be determined using a mass inertia method. A difference between the at the beginning of the Washing process and the load determined in the current measurement corresponds to the amount of water in the load. To determine the dewatering behavior using the torque profile of the drum 110, the torque requirement or the power requirement is observed as the drainage of the laundry 115 progresses: on a speed plateau, the torque or power requirement falls as the drainage progresses. If the change in the torque or power curve falls below a limit, the speed plateau ends because the optimal drainage was reached on this plateau. At the end of the spin cycle after the main wash, the load quantity of the drum 110 is determined again using a mass inertia method. This determines the amount of water remaining in the load. The aim is to determine the optimal water intake quantity for the following spin cycle from the determined values. The amount of flushing water for the following flushing cycle is then determined. The amount of rinsing water for the following rinsing step is determined on the basis of the load, the remaining water and the dewatering behavior. Only so much water is used that no free liquor is formed. The total amount of rinse water that is added is bound in the wash 115. Then the calculated amount of rinsing water is added. The addition of water to the amount of flushing water can take place via the flushing of the door sight glass or via the flooding of the washing machine 100 . If the water is introduced into the laundry 115 via the flooding, the flooding circuit must first be rinsed with fresh water. To this end, water is introduced into the tub of the washing machine 100 and the water introduced is pumped out again. After the rinsing water has been added, a washing movement, ie a rotary movement of the drum 110, is carried out for rinsing. The liquor bound in the wash 115 is then reduced. This is followed by a multiple cyclical repetition of determining the amount of rinsing water, adding rinsing water and rinsing, as well as reducing the bound liquor. According to one exemplary embodiment, the amount of water in the rinsing water is increased slightly in each rinsing step of the rinsing process, ie with each repetition, in order to increase the concentration difference over the exchange process. Finally, the laundry is spun 115.

Bei dem hier beschriebenen Spülen der Wäsche 115 nur mit gebundener Flotte wird durch den Verzicht auf die freie Flotte der Leistungsbedarf für die Waschbewegung der Trommel 110 reduziert und der Austausch zwischen Frischwasser und Waschlauge erfolgt in der gebundenen Flotte deutlich schneller als der Austausch zwischen freier Flotte und gebundener Flotte. Durch verringerte Schleuderdrehzahlen der Trommel 110 im Zwischenschleudern werden der Leistungsbedarf und die mechanische Belastung der Waschmaschine 100 reduziert. Der Zeitbedarf für einen Spülzyklus wird reduziert, sodass zusätzliche Zyklen zur Verbesserung der Spülwirkung durchgeführt werden können. Zusätzlich wird das Wasser durch die reduzierten Drehzahlen der Trommel 110 im Spülschleudern nicht so tief in die Wäsche 115 getrieben, sodass sich im Endschleudern bessere Endrestfeuchten erzielen lassen. Dabei werden die Steuerung der Entwässerung der Wäsche 115 anhand der Beladung, wie Menge und Art der Beladung, die Steuerung des Drehzahlverlaufs der Trommel 110 anhand des Drehmoment- bzw. Leistungsverlaufs durchgeführt. Die Entwässerung der Wäsche 115 wird über ein Massenträgheitsverfahren und durch Ermitteln der verbliebenen Restwassermenge überwacht. Die Spülwassermenge wird dabei für den folgenden Spülgang so ermittelt, dass die Wäsche 115 nur mit gebundener Flotte gespült wird.When rinsing the laundry 115 with bound liquor as described here, the power requirement for the washing movement of the drum 110 is reduced by dispensing with the free liquor and the exchange between fresh water and washing suds takes place in the bound liquor much faster than the exchange between free liquor and bound fleet. The reduced spin speeds of the drum 110 in the intermediate spin cycle reduce the power requirement and the mechanical load on the washing machine 100 . The time required for a rinsing cycle is reduced, so that additional cycles can be carried out to improve the rinsing effect. In addition, the water is im by the reduced speeds of the drum 110 Rinse spin cycles are not driven so deeply into the laundry 115 that better final residual moisture levels can be achieved in the final spin cycle. The dewatering of the laundry 115 is controlled based on the load, such as the amount and type of load, and the speed profile of the drum 110 is controlled based on the torque or power profile. The dewatering of the laundry 115 is monitored using a mass inertia method and by determining the remaining amount of residual water. The amount of rinsing water is determined for the following rinsing cycle in such a way that the laundry 115 is only rinsed with bound liquor.

Figur 2 zeigt ein Ablaufdiagramm eines Verfahrens 200 zum Betreiben einer Waschmaschine gemäß einem Ausführungsbeispiel. Die Waschmaschine weist eine Trommel zum Aufnehmen von Wäsche auf. Das Verfahren 200 weist einen Schritt 205 des Ermittelns, einen Schritt 210 des Durchführens und einen Schritt 215 des Reduzierens auf. Im Schritt 205 des Ermittelns wird eine Spülwassermenge für einen Spülvorgang der Waschmaschine ermittelt. Die Spülwassermenge wird unter Verwendung einer Beladungsmenge an Wäsche in der Trommel, einer Restflotte in der Wäsche zu Beginn des Spülvorgangs und eines Entwässerungsverhaltens der Wäsche ermittelt. Im Schritt 210 des Durchführens wird der Spülvorgang unter Verwendung der ermittelten Spülwassermenge durchgeführt. Dabei ist die Spülwassermenge vollständig durch die Wäsche gebunden. Während des Spülvorgangs wird eine Drehbewegung der Trommel ausgeführt. Im Schritt 215 des Reduzierens wird die in der Wäsche gebundene Flotte aus Restflotte und Spülwassermenge reduziert. Zum Reduzieren wird eine weitere Drehbewegung der Trommel ausgeführt. figure 2 shows a flowchart of a method 200 for operating a washing machine according to an embodiment. The washing machine has a drum for receiving laundry. The method 200 has a step 205 of determining, a step 210 of performing and a step 215 of reducing. In step 205 of determination, a quantity of rinsing water for a rinsing process of the washing machine is determined. The amount of rinsing water is determined using a load of laundry in the drum, a residual liquor in the laundry at the beginning of the rinsing process and a drainage behavior of the laundry. In step 210 of implementation, the rinsing process is performed using the determined amount of rinsing water. The amount of rinsing water is completely bound by the laundry. During the rinsing process, the drum rotates. In the reduction step 215, the liquor bound in the wash is reduced from residual liquor and the amount of rinse water. To reduce, another rotary movement of the drum is performed.

Die Schritte 205 des Ermittelns, 210 des Durchführens 215 des Reduzierens werden gemäß einem Ausführungsbeispiel mehrfach zyklisch wiederholt.According to one exemplary embodiment, the steps 205 of determining, 210 of carrying out 215 of the reduction are repeated cyclically multiple times.

Gemäß einem Ausführungsbeispiel umfasst das Verfahren 200 zudem einen Schritt 220 des Bestimmens. Im Schritt 220 wird unter Verwendung der Beladungsmenge und einer Wasserzulaufmenge eine Drehzahl zum Ausführen der Drehbewegung und zusätzlich oder alternativ der weiteren Drehbewegung der Trommel bestimmt. Der Schritt 220 des Bestimmens wird vor dem Schritt 210 des Durchführens undloder vor dem Schritt 215 des Reduzierens ausgeführt.According to one embodiment, the method 200 also includes a step 220 of determining. In step 220, a speed for performing the rotary movement and additionally or alternatively the further rotary movement of the drum is determined using the load quantity and a water intake quantity. The step 220 of determining is performed before the step 210 of performing and/or before the step 215 of reducing.

Das Verfahren umfasst gemäß einem Ausführungsbeispiel auch einen Schritt 225 des Erkennens. Im Schritt 225 wird die Beladungsmenge unter Verwendung eines Massenträgheitsmoments der Wäsche undloder eines Saugverhaltens der Wäsche undloder einer erfassten Masse der Wäsche erkannt. Der Schritt 225 des Erkennens wird optional vor dem Schritt 205 des Ermittelns ausgeführt.According to one embodiment, the method also includes a step 225 of recognition. In step 225, the load quantity is detected using a mass moment of inertia of the laundry and/or a suction behavior of the laundry and/or a detected mass of the laundry. The step 225 of recognizing is optionally performed before the step 205 of determining.

Zudem umfasst das Verfahren 200 gemäß einem Ausführungsbeispiel einen Schritt 230 des Erfassens. Im Schritt 230 des Erfassens wird unter Verwendung eines Massenträgheitsmoments der Wäsche undloder eines Drehmomentverlaufs der Trommel das Entwässerungsverhalten der Wäsche erfasst. Optional wird der Schritt 230 des Erfassens vor dem Schritt 205 des Ermittelns ausgeführt.In addition, according to one exemplary embodiment, the method 200 includes a step 230 of detecting. In step 230 of detection, the drainage behavior of the laundry is detected using a mass moment of inertia of the laundry and/or a torque profile of the drum. Optionally, step 230 of detecting is performed before step 205 of determining.

Umfasst ein Ausführungsbeispiel eine "und/oder"-Verknüpfung zwischen einem ersten Merkmal und einem zweiten Merkmal, so ist dies so zu lesen, dass das Ausführungsbeispiel gemäß einer Ausführungsform sowohl das erste Merkmal als auch das zweite Merkmal und gemäß einer weiteren Ausführungsform entweder nur das erste Merkmal oder nur das zweite Merkmal aufweist.If an embodiment includes an "and/or" link between a first feature and a second feature, this should be read in such a way that the embodiment according to one embodiment includes both the first feature and the second feature and according to a further embodiment either only that having the first feature or only the second feature.

Claims (4)

  1. Method (200) for operating a washing machine (100), the washing machine (100) having a drum (110) for receiving laundry (115), the method (200) comprising the steps of:
    determining (205) a quantity of rinsing water for a rinsing process of the washing machine (100), the quantity of rinsing water being determined using a load quantity of laundry (115) in the drum (110), a residual solution in the laundry (115) at the beginning of the rinsing process and a drainage behaviour of the laundry (115);
    performing (210) the rinsing process using the determined quantity of rinsing water, the quantity of rinsing water being completely absorbed by the laundry (115), with a rotational movement of the drum (110) being executed during the rinsing process; and
    reducing (215) the solution which consists of residual solution and quantity of rinsing water and is absorbed in the laundry (115), with a further rotational movement of the drum (110) being executed in order to carry out said reduction (215),
    characterised by
    a step (225) of detecting the load quantity using a mass moment of inertia of the laundry (115) and/or a suction behaviour of the laundry (115) and/or a detected mass of the laundry (115),
    the residual solution being determined in the determination step (205) using a washing load quantity from a washing process preceding the rinsing process and the load quantity at the beginning of the rinsing process, and
    a step (230) of detecting the drainage behaviour of the laundry (115) using a mass moment of inertia of the laundry (115) and/or a torque curve of the drum (110).
  2. Method (200) according to claim 1, wherein the determination step (205), the performing step (210) and the reduction step (215) are cyclically repeated in order to exchange the residual solution in the laundry (115) with rinsing water.
  3. Method (200) according to claim 2, wherein, upon each repetition of the determination step (205), the quantity of rinsing water is increased compared to a preceding execution of the determination step (205) in order to rinse the laundry (115).
  4. Method (200) according to any of the preceding claims, comprising a step (220) of determining a rotational speed for executing the rotational movement and/or the further rotational movement of the drum (110) using the load quantity and a water intake quantity.
EP19194107.9A 2018-09-14 2019-08-28 Method for operating a washing machine Active EP3623514B1 (en)

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DE102018122471.0A DE102018122471A1 (en) 2018-09-14 2018-09-14 Method and device for operating a washing machine and washing machine

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EP3623514B1 true EP3623514B1 (en) 2023-04-19

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Publication number Priority date Publication date Assignee Title
DE3900826C2 (en) * 1989-01-13 1996-04-25 Aeg Hausgeraete Gmbh Process for washing clothes in a washing machine
DE4138428A1 (en) * 1991-11-22 1993-05-27 Gisela Stoll Rinsing washing in washing machine - by collecting extracted water and supplying it back to washing in rinsing cycles following first one
NZ272651A (en) * 1995-07-26 1998-04-27 Fisher & Paykel Automatic laundry machine; method of washing and rinsing involving control of the various steps of the washing cycle; washing/rinsing apparatus
EP2616581B1 (en) * 2010-09-14 2022-01-26 LG Electronics Inc. Method of controlling a washing machine
DE102017103167A1 (en) * 2017-02-16 2018-08-16 Miele & Cie. Kg Water supply control and washing machine

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DE102018122471A1 (en) 2020-03-19
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