EP3246451A1 - Method for washing laundry, method and device for operating a washing machine and washing machine for washing laundry - Google Patents

Abstract

The invention relates to a method for washing laundry, a method for operating a washing machine, and a washing machine for washing laundry. The method can be carried out in conjunction with a washing machine (100) having a drum (110) for receiving the laundry. In this case, the drum (110) has at least one drum wall made of a ferromagnetic material. The method includes a step of inducing eddy currents in the at least one drum wall of the drum (110) to heat the drum (110). Further, the method comprises a step of circulating wash liquor expelled from the laundry through the drum (110) to flood the laundry with wash liquor to saturate the laundry with wash liquor.

Description

The invention relates to a method for washing laundry, a method for operating a washing machine, a corresponding device and a corresponding computer program product and a washing machine for washing laundry.

Some laundry care appliances may have induction heating. It may be provided for laundry care equipment, for example, a function comfort smoothing with low free fleet below a drum shell of a laundry drum. For example, heating by means of radiators can only be carried out if there is a free fleet. It can be heated in this case, the free fleet and a heat transfer to the laundry in a liquor exchange can be achieved.

The DE 10 2014 208 514 A1 describes a laundry treatment device with induction heating.

The object of the invention is to provide an improved method for washing laundry, an improved method for operating a washing machine, an improved device, an improved laundry washing machine and an improved computer program product.

According to the invention, this object is achieved by a method for washing laundry, by a method for operating a washing machine, by a corresponding device, by a washing machine for washing laundry and by a corresponding computer program product having the features of the main claims. Advantageous embodiments and further developments of the invention will become apparent from the following subclaims.

The achievable with the present invention consist in addition to an induction heating for washing machines and washer-dryers, especially for washing machines and washer-dryer with flooding function, for example, among other things, that water, detergent and energy can be saved. In particular, heating can be made possible without a free liquor and moist laundry can be heated without additional consumption of additional water. In addition, switching on and off the heating in the heating step can be avoided especially in steam application. There is no need to heat up a free fleet, which can lead to energy savings. This can be achieved inexpensively and structurally advantageous, wherein above or side of a tub, an electric coil is arranged and a drum uniformly can be heated. In this case, the drum can be tempered, heated or heated directly and as uniformly as possible or uniformly. Thus, the drum can act as a heating element for tempering or heating laundry.

• Induzieren von Wirbelströmen in mindestens einer Trommelwand, um die Trommel zu erwärmen; und
• Umwälzen von aus der Wäsche ausgetriebener Waschlauge durch die Trommel, um die Wäsche mit Waschlauge zu sättigen.

The invention relates to a method for washing laundry, the method being executable in connection with a washing machine, the washing machine having a drum for receiving the laundry, the drum having at least one drum wall made of a ferromagnetic material, the method comprising at least the following steps having:

• Inducing eddy currents in at least one drum wall to heat the drum; and
• Circulating wash water expelled from the wash through the drum to saturate the wash with wash liquor.

The method may be practiced in conjunction with or using one embodiment of a washing machine mentioned below. The eddy currents can be induced by means of an electrical signal applied to the at least one electrical coil. The washing machine can be designed as a washing machine, a washer-dryer or the like. A drum wall may represent a drum shell. The at least one electrical coil can be arranged outside the drum. The drum may be rotatable relative to an electrical coil.

According to one embodiment, the step of circulating during the step of inducing may be carried out once or repeatedly. Such an embodiment has the advantage that by heating the drum wall connected to a flooding a uniform heat distribution in the laundry can be realized even with large batches of energy and water-saving manner.

Also, the step of circulating before and additionally or alternatively after the step of inducing may be carried out once or repeatedly. In addition, the step of inducing may be repeatedly performed before, during and additionally or alternatively after the step of circulating. Such an embodiment offers the advantage that the laundry can be washed with reduced or minimized use of heating energy and washing liquor.

• Anlegen eines elektrischen Signals an die zumindest eine elektrische Spule, um Wirbelströme in der zumindest einen Trommelwand zu induzieren, um die Trommel zu erwärmen; und
• Ausgeben eines Umflutungssignals an die Umflutungseinheit, um aus der Wäsche ausgetriebene Waschlauge durch die Trommel zum Umfluten der Wäsche mit Waschlauge umzuwälzen, um die Wäsche mit Waschlauge zu sättigen.

A method for operating a washing machine is also presented, wherein the washing machine has a drum for receiving laundry, wherein the drum has at least one drum wall of a ferromagnetic material, at least an electrical coil disposed adjacent to the drum and a flooding unit, the method comprising at least the following steps:

• Applying an electrical signal to the at least one electrical coil to induce eddy currents in the at least one drum wall to heat the drum; and
• Dispensing a Umflutungssignals to the Umwutungseinheit to circulate leached from the wash liquor through the drum to flooding the laundry with wash to saturate the laundry with wash liquor.

The method may be practiced in conjunction with or using one embodiment of a washing machine mentioned below. In particular, the method can be implemented by an embodiment of a device mentioned below or by a control device.

According to one embodiment, in the step of application, an electrical signal may be applied which is suitable for controlling a heating capacity dependent on a loading amount of laundry (280) in the drum and / or on a temperature of the drum, the wash liquor and / or the laundry to create. Such an embodiment has the advantage that the drum and thus also laundry therein can be heated quickly, efficiently and depending on the load.

Further, the step of outputting may be repeatedly executed before, during and additionally or alternatively after the application step. Such an embodiment has the advantage that by heating the drum wall connected with activated flooding while saving energy and water, a uniform heat distribution in the laundry can be realized even with large laundry items.

According to one embodiment, in the step of the application, a high-frequency electrical alternating voltage can be applied as an electrical signal in order to generate an alternating magnetic field with which the at least one drum wall can be acted upon. Additionally or alternatively, the electrical signal can be pulse width modulated. Such an embodiment offers the advantage that the drum and thus also laundry located therein can be heated quickly and efficiently.

The approach presented here also creates a device that is designed to perform the steps of a variant of a method presented here in appropriate facilities to drive or implement. An embodiment of a washing machine mentioned below may comprise the device. Also through this Embodiment of the invention in the form of a device, the object underlying the invention can be solved quickly and efficiently.

The apparatus may be configured 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 which 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 apparatus may be configured to determine the output signals using a processing instruction implemented in hardware or software. For example, the device may for this purpose comprise a logic circuit, an integrated circuit or a software module and be implemented, for example, as a discrete component or be comprised by a discrete component.

• eine Trommel zum Aufnehmen der Wäsche, wobei die Trommel zumindest eine Trommelwand aus einem ferromagnetischen Material aufweist;
• zumindest eine benachbart zu der Trommel angeordnete elektrische Spule zum Induzieren von Wirbelströmen in der zumindest einen Trommelwand, um die Trommel zu erwärmen;
• eine Umflutungseinheit zum Umwälzen von aus der Wäsche ausgetriebener Waschlauge durch die Trommel zum Umfluten der Wäsche mit Waschlauge, um die Wäsche mit Waschlauge zu sättigen; und
• eine Ausführungsform der vorstehend genannten Vorrichtung, wobei die Vorrichtung ausgebildet ist, um mindestens die Trommel, die zumindest eine elektrische Spule und die Umflutungseinheit zu steuern.

Furthermore, a washing machine for washing laundry is presented, wherein the washing machine has at least the following features:

• a drum for receiving the laundry, the drum having at least one drum wall made of a ferromagnetic material;
• at least one electrical coil disposed adjacent to the drum for inducing eddy currents in the at least one drum wall to heat the drum;
• a flooding unit for circulating wash liquor expelled from the laundry through the drum to flooded the laundry with wash liquor to saturate the laundry with wash liquor; and
• an embodiment of the above-mentioned device, wherein the device is designed to control at least the drum, the at least one electric coil and the flooding unit.

Together with the flooding can be provided by means of the drum as a heating element, a large contact surface for heat transfer to the laundry. As a result, heat can be transferred quickly to the laundry, so that a heating time can be kept low.

According to one embodiment, all drum walls of the drum may be formed of the ferromagnetic material. For example, the drum as a whole may be formed from the ferromagnetic material. Such an embodiment has the advantage that a uniform and large-scale heating of the drum can be achieved.

In particular, the at least one electrical coil can be flat and additionally or alternatively formed from copper. In this case, the at least one electrical coil with high-frequency electrical AC voltage can be operated. Such an embodiment offers the advantage that a space-saving and efficient heating of the drum and thus the laundry is made possible.

Furthermore, the washing machine may have a tub, wherein the drum may be disposed within the tub. In this case, the at least one electrical coil can be arranged on the tub. The tub can be shaped drum-shaped. Such an embodiment offers the advantage that the at least one electrical coil can be positioned in a simple and defined manner adjacent to the drum.

In addition, the at least one electric coil can be arranged outside of a bottom region arranged between the drum and a bottom of the washing machine in the washing machine. More specifically, the at least one electrical coil may be disposed upwardly or laterally relative to the drum relative to orientation in an installed, erected, or in use state of the washing machine. Such an embodiment offers the advantage that a simple construction of the washing machine as well as an uncomplicated access to the at least one coil can be realized.

The washing machine can also have at least one shielding element for shielding a magnetic field generated by the at least one electric coil in the direction away from the drum. Such an embodiment offers the advantage that propagation of the magnetic field outside the drum can be minimized or the magnetic field can be concentrated on the drum. In this case, surrounding devices of the washing machine can be protected from the magnetic field.

In this case, the at least one shielding element may comprise at least one ferrite plate and additionally or alternatively at least one aluminum plate. For example, resulting magnetic fields can be shielded by means of ferrite plates, wherein any remaining magnetic fields can additionally be shielded by means of an aluminum plate, wherein ferrite plates can be arranged between the drum and the aluminum plate. Such an embodiment offers the advantage that a reliable and effective magnetic shielding can be achieved.

Also of advantage is a computer program product or computer program with program code which is stored on a machine-readable carrier or storage medium such as a semiconductor memory, a hard disk memory or an optical memory can be. When the program product or program is executed on a computer or device, the program product or program may be used to perform, implement, and / or control the steps of the method of any of the embodiments described above.

Figur 1

eine schematische Darstellung eines Waschautomaten gemäß einem Ausführungsbeispiel der Erfindung;

Figur 2

eine schematische Darstellung eines Teilabschnittes eines Waschautomaten gemäß einem Ausführungsbeispiel der Erfindung;

Figur 3

eine schematische Darstellung eines Teilabschnittes eines Waschautomaten gemäß einem Ausführungsbeispiel der Erfindung;

Figur 4

ein Ablaufdiagramm eines Verfahrens zum Waschen gemäß einem Ausführungsbeispiel der Erfindung;

Figur 5

ein Ablaufdiagramm eines Verfahrens zum Betreiben gemäß einem Ausführungsbeispiel der Erfindung; und

Figur 6

ein Ablaufdiagramm eines Prozesses zum Waschen gemäß einem Ausführungsbeispiel der Erfindung.

An embodiment of the invention is shown purely schematically in the drawings and will be described in more detail below. It shows

FIG. 1

a schematic representation of a washing machine according to an embodiment of the invention;

FIG. 2

a schematic representation of a portion of a washing machine according to an embodiment of the invention;

FIG. 3

a schematic representation of a portion of a washing machine according to an embodiment of the invention;

FIG. 4

a flow diagram of a method for washing according to an embodiment of the invention;

FIG. 5

a flowchart of a method of operation according to an embodiment of the invention; and

FIG. 6

a flow chart of a process for washing according to an embodiment of the invention.

FIG. 1 shows a schematic representation of a washing machine 100 for washing laundry according to an embodiment of the invention. The washing machine 100 is designed here as a washing machine, a washer-dryer or the like. The washing machine 100 may also be referred to as a laundry treating appliance or laundry care appliance.

The washing machine 100 has a drum 110 for receiving the laundry. The drum 110 is rotatably mounted in the washing machine 100. At least one wall or drum wall of the drum 110 is formed of a ferromagnetic material. Optionally, all the drum walls of the drum 110 are formed of the ferromagnetic material.

Furthermore, the washing machine 100 has, for example, only one electric coil 120. The electrical coil 120 is used to induce eddy currents into the at least one drum wall of the drum 110. The eddy currents heat the drum 110. The electric coil 120 is disposed adjacent to the drum 110 so that an alternating magnetic field generated by the coil 120 acts on at least a portion of the drum 110.

According to the in FIG. 1 illustrated embodiment of the invention, the electric coil 120 is disposed outside a arranged between the drum 110 and a bottom of the washing machine 100 bottom portion in the washing machine 100. According to one embodiment, the electrical coil 120 is formed as a flat coil or planar. According to one embodiment, the electrical coil 120 comprises turns of copper. In one embodiment, the washing machine 100 may include a plurality of electrical coils 120.

The washing machine 100 has according to the in FIG. 1 shown embodiment of the invention, a flooding unit 130. The flooding unit 130 is configured to circulate wash liquor to circulate the laundry with wash liquor through the drum 110. Here, the flooding unit 130 is formed, for example, to intermittently circulate the washing liquor through the drum 110 to keep the laundry in a wet state.

In addition, the washing machine 100 according to the in FIG. 1 illustrated embodiment of the invention, a tub 140 on. Within the tub 140, the drum 110 is arranged. Here, the electric coil 120 is arranged by way of example on the tub 140. In this case, a wall portion of the tub 140 is disposed between the electric coil 120 and the drum 110.

According to the in FIG. 1 shown embodiment of the invention, the washing machine 100 further example, only a shielding 150 on. The shielding member 150 is configured to shield a magnetic field generated by the electric coil 120 away from the drum 110. In this case, the electric coil 120 is arranged between the shielding element 150 and the drum 110 or the tub 140.

The washing machine 100 also has an operating device 160 or device 160 for operating the washing machine 100. The operating device 160 is, for example, a control device or the like. According to the in FIG. 1 In accordance with an exemplary embodiment of the invention, the shielding element 150 is arranged between the electrical coil 120 and the operating device 160, so that magnetic field sensitive components of the operating device 160 can be protected by the shielding element 150 from the magnetic fields generated by the coil 120.

The operating device 160 has a contact device 162. The applicator 162 is configured to provide an electrical signal 172 for inducing eddy currents in the at least one drum wall for heating the drum 110 to the electrical coil 120 create. The electrical signal 172 may be a high frequency alternating electrical voltage.

The operating device 160 has, according to the in FIG. 1 embodiment of the invention further shown an output device 164. The dispenser 164 is configured to apply a soak signal 174 to the flooding unit 130 to cause circulating wash liquor through the drum to flood the laundry with wash liquor.

FIG. 2 shows a schematic representation of a portion of a washing machine according to an embodiment of the invention. FIG. 2 shows the section of the washing machine in a schematic sectional view. Here corresponds or resembles the in FIG. 2 shown washing machine the washing machine off FIG. 1 , From the washing machine are in FIG. 2 Here, the drum 110, the electric coil 120 and the tub 140 shown. Further, by way of example, laundry 280 is shown in drum 110.

The electric coil 120 has according to the in FIG. 2 shown embodiment of the invention, a curved section profile. A curvature of the electric coil 120 follows a curvature of the drum 110 and the tub 140.

In other words, shows FIG. 2 a schematic diagram for induction heating for a washing machine. The electrical coil 120 is mounted on an upper side or laterally on the tub 140 in relation to an orientation in a mounted state or operating state. The drum 110 can be heated inductively by means of the electric coil 120.

FIG. 3 shows a schematic representation of a portion of a washing machine according to an embodiment of the invention. It shows FIG. 3 the section of the washing machine in a sectional view. The in FIG. 3 shown washing machine corresponds or similar to the washing machine FIG. 1 , From the washing machine are in FIG. 3 Here, the electric coil 120 and the tub 140 shown. The electric coil 120 is disposed on the tub 140.

FIG. 4 FIG. 10 shows a flowchart of a method 400 for washing laundry according to an embodiment of the invention. The washing process 400 is in conjunction with the washing machine FIG. 1 . FIG. 2 respectively. FIG. 3 or a similar washing machine executable.

The method 400 for washing includes a step 410 of inducing eddy currents in the at least one drum wall to heat the drum.

According to the in FIG. 4 In the illustrated embodiment of the invention, the washing process 400 also includes a step 420 of circulating wash liquor through the drum to circulate the wash with wash liquor. The step 420 of circulation is executable before, during and / or after the step 410 of inducing. In this case, the step 420 of the circulation is also repeatedly executable.

In other words, in this case, the step 410 of the induction and the step 420 of the circulation, for example, parallel to each other and / or at different times and / or at least temporarily intermittently executable.

FIG. 5 FIG. 12 shows a flow chart of a method 500 for operation according to an embodiment of the invention. The method 500 is operable to operate a washing machine. More specifically, the method 500 is executable to exclude the washing machine FIG. 1 . FIG. 2 respectively. FIG. 3 or to operate a similar washing machine.

Thus, the method 500 is operable in conjunction with the washing machine FIG. 1 . FIG. 2 respectively. FIG. 3 or a similar washing machine executable. In this case, the method 500 is designed for operation by means of or using the operating device FIG. 1 or a similar operating device executable. In other words, the operating device is off FIG. 1 configured to execute the method 500 for operation.

The method 500 for operating includes a step 510 of applying an electrical signal to the electrical coil. By the applied electrical signal eddy currents are induced in the at least one drum wall for heating the drum by means of the electric coil. The electrical signal is, for example, a high-frequency electrical alternating voltage. Thus, in this case, in step 510 of the application, for example, the high-frequency electrical alternating voltage is applied as an electrical signal in order to generate an alternating magnetic field, with which the at least one drum wall of the drum is acted upon.

Additionally or alternatively, according to an exemplary embodiment, in step 510 of the application, the electrical signal is pulse-width modulated depending on a load of laundry in the drum or a duty cycle of the electrical signal is modulated depending on the load.

In one embodiment, the method 500 further comprises operating a step 520 of outputting a flooding signal to a flooding unit. In step 520 of the output, the flooding signal is output or output to the output Flooding unit provided. The flooding signal is suitable for effecting circulation of wash liquor through the drum to circulate the wash with wash liquor when used by the flooding unit.

In this case, the step 520 of the output is executable before, during and / or after the step 510 of the application. Also, the step 520 of issuing is repeatedly executable. In other words, the step 510 of the application and the step 520 of the output are, for example, parallel to each other and / or executable at different times and / or intermittently at least temporarily.

FIG. 6 FIG. 12 shows a flowchart of a process 600 for washing according to an embodiment of the invention. The washing process 600 is in conjunction with the washing machine FIG. 1 . FIG. 2 respectively. FIG. 3 or a similar washing machine executable. Also, the process 600 for washing is in the context of the method 400 for washing FIG. 4 and / or with the method 500 for operation FIG. 5 or similar procedures.

In a block 602, laundry is brought to a desired saturation with washing liquor or to a desired water quantity. Subsequently, a flooding is started in a block 604 to bring residual water into the laundry. Thus, there is no more free liquor and water or wash liquor is completely or at least approximately completely absorbed in the laundry item.

In a block 606 induction, in particular with a setting of a so-called booster operation, for example, with a power of 2.5 kilowatts or the like, started until a temperature of 10 Kelvin or a calculated depending on the bound fleet starting energy is reached. The so-called booster mode can be selected to quickly get up to temperature.

Subsequently, in a block 608, adjustment of the induction in a normal operation is made. In order to optimally absorb the introduced heating energy from the laundry, the power can be adjusted depending on the load. In normal operation, a heating energy of, for example, 1.0 kilowatts can be introduced at a low load, a heating energy of, for example, 1.5 kilowatts at a medium load, and a heating energy of, for example, 2.0 kilowatts at a high load. A heat flow can be increased by the flooding and heat can also get into a core of the laundry.

Thereafter, in a block 612, flooding is continuously performed until a target temperature Tsoll is reached. For a small load or load, the Flooding, for example, be carried out every 5 minutes, for example, every 2 minutes for a medium load and, for example, every 30 seconds for a large load. A speed of the drum is adapted here to the Umflutungsabläufe or to the load. If a current speed is greater than a Umwutungsdrehzahl n _flooding , is flooded. The flooding speed n _flooding may for example be in the range of 60 to 100 min ^-1 . Speeds of more than 60 min ^-1 can expel caustic, which can then be flooded or circulated to the flooding.

Subsequently, in a block 614, the induction operation is turned off when the target temperature Tset is reached. Thereafter, process 600 proceeds to decision block 616, at which it is checked whether a post-heating function is active or not. If it is determined in decision block 616 that the post-heating function is active, process 600 proceeds to block 618.

In block 618, the induction mode is switched to postheat operation. Here, a power level is set as a function of the setpoint temperature Tset. The larger the setpoint temperature is Tsoll, the higher is an energy requirement. An introduced power can be, for example, between 0.3 kilowatt and 0.7 kilowatts. In this case, irrespective of the load, the flooding can be carried out continuously, for example, every minute, if a current rotational speed is above 60 min ^-1 . An energy requirement for maintaining a temperature is dependent on the temperature level, wherein the loading amount or laundry load plays a minor role.

Thereafter, in a block 622, a processing of a further program or sequence of a washing program takes place. If it is determined in decision block 616 that the postheat function is not active, process 600 jumps directly from decision block 616 to block 622.

The following are with reference to the FIGS. 1 to 6 Background and advantages of embodiments of the invention again summarized and / or briefly explained in other words.

An induction heating is realized in which the at least one drum wall or a drum shell of the drum 110 can be heated or tempered by means of the electric coil 120.

As a result, heating energy can be supplied at an early stage even when the operating mode of the washing machine 100 is referred to as a stepped refilling. The drum 110 is warmed up for the actual heating process. After the laundry 280 is sufficiently wet, the actual heating process begins.

In this case, the laundry 280, for example, in a normal washing rhythm, z. As a ramping rhythm or the like, rotated. Phasewise, the laundry 280 is optionally hurled briefly. By such expulsion of liquor a flooding pressure-dependent activated. The heat of the drum wall or the drum shell passes into the liquor and is brought by the introduction of the wash liquor by flooding directly into the laundry 280.

This process can be carried out depending on the load. The larger a lot or batch of laundry, the more often the liquor can be expelled by spin-coating or the like. Furthermore, a rotational speed of the drum 110 may be increased. For small items of laundry can be completely dispensed with a spin on, because sufficient contact of the laundry 280 with the drum 110 is also present in normal washing rhythms.

Thus, with a large amount of laundry or a large load of laundry 280, the flooding can be activated, for example, once a minute or the like. For example, at a mid-level laundry, the flooding may be activated every two minutes or so. In the case of a small batch of laundry, the flooding can optionally be dispensed with.

A continuous direct contact of the drum 110 with the laundry or the laundry 280 is at a drum speed equal to or higher given the so-called application speed.

By such a processing of the heating process, for example, on and off operations can be at least partially avoided until reaching a desired dial temperature or a desired heating energy.

Furthermore, by means of a regulated power output of the induction heating, similar to a cooktop, a power which is targeted for the process step can be adjusted by means of the electrical signal 172. The power can be adjusted so that an introduced heating energy can be absorbed by the laundry 280. In this case, a loading amount of laundry 280 can be considered.

In a normal heating process, a heating power of, for example, 1.2 kilowatts can be introduced at a low load, a heating power of, for example, 1.8 kilowatts at a medium load, and a heating power of, for example, 2.1 kilowatts at a high load. In a reheating, a heating power of, for example, 1.0 kilowatts can be introduced and in a rapid heating (booster), a heating power of, for example, 3.0 kilowatts can be introduced.

For such induction heating, a washing drum 110 or drum 110 is used with a drum wall of ferromagnetic material. Outside the drum wall, a flat copper coil 120 operable, for example, with high-frequency alternating voltage is mounted. This generates an alternating magnetic field which generates eddy currents in the drum wall. Joule losses heat the drum wall. Thus, the entire drum is heated by the induction heater.

For example, the resulting magnetic fields can be shielded by means of ferrite plates. The remaining magnetic fields may additionally be shielded from an aluminum plate adjacent to the ferrite plates. In this case, the ferrite plates can be arranged between the aluminum plate and the electrical coil 120. Thus, the ferrite plates and the aluminum plate represent shielding members 150 of the washing machine 100.

Due to the induction heating no free fleet needs to be available to start a heating process. Since no free liquor is needed for the heating, a water consumption of the washing machine 100 can be reduced. This has the consequence that a detergent concentration in the water increases and additionally or alternatively, an addition of detergent can be reduced. Even with very small loads no free fleet needs to be heated and also an unwanted heating of surrounding components of the washing machine 100 can be minimized. It can also be started early with a warming, which can affect a washing effect positive.

In a washing process with active flooding, in which the laundry 280 is at least temporarily brought into a moist state, heating before, during and / or after respective water supply processes, a so-called stepped refilling, can be made possible. So even with a gradual refueling a warming can be achieved. It can also be avoided, for example, a cumbersome heating process by means of steaming. In addition, however, a Dampfglättungsfunktion can be realized quickly and reliably.

Claims (15)

A method (400) for washing laundry (280), said method (400) being practicable in conjunction with a laundry dryer (100), said washing machine (100) comprising a drum (110) for receiving said laundry (280). wherein the drum (110) has at least one drum wall made of a ferromagnetic material, and wherein the method (400) has at least the following steps: Inducing (410) eddy currents in the at least one drum wall of the drum (110) to heat the drum (110); and Circulating (420) wash liquor expelled from the wash (280) through the drum (110) to flooding the wash (280) with wash liquor to saturate the wash (280) with wash liquor. The method (400) of claim 1, wherein the step (420) of agitating is performed during the step (410) of inducing. A method (400) according to any one of the preceding claims, wherein the step (420) of agitating is performed before and / or after the step (410) of inducing. A method (500) for operating a washing machine (100), wherein the washing machine (100) comprises a drum (110) for receiving laundry (280), the drum (110) having at least one drum wall made of a ferromagnetic material at least one adjacent one to the drum (110) arranged electrical coil (120) and a Umflutungseinheit (130), wherein the method (500) has at least the following steps: Applying (510) an electrical signal (172) to the at least one electrical coil (120) to induce eddy currents in the at least one drum wall to heat the drum (110); and Dispensing (520) a flooding signal (174) to the flooding unit (130) to circulate wash liquor expelled from the laundry (280) through the drum (110) to flooded the laundry (280) with wash liquor to wash the laundry (280) with wash liquor to saturate. A method (500) according to claim 4, wherein in step (510) of applying, an electrical signal (172) suitable for applying one of Loading amount of laundry (280) in the drum (110) dependent and / or dependent on a temperature of the drum (110), the wash liquor and / or the laundry (280) to generate heating power. The method (500) according to any one of claims 4 to 5, wherein the step (520) of outputting is performed repeatedly before, during and / or after the step (510) of applying. Apparatus (160) adapted to perform the steps of the method (500) of any of claims 4 to 6. Washing machine (100) for washing laundry (280), wherein the washing machine (100) has at least the following features: a drum (110) for receiving the laundry (280), the drum (110) having at least one drum wall made of a ferromagnetic material; at least one electrical coil (120) disposed adjacent to the drum (110) for inducing eddy currents in the at least one drum wall to heat the drum (110); a flooding unit (130) for circulating wash liquor expelled from the laundry (280) by the drum (110) for flooding the laundry (280) with wash liquor to saturate the laundry (280) with wash liquor; and The apparatus of claim 7, wherein the apparatus is configured to control at least the drum (110), the at least one electrical coil (120) and the flooding unit (130). A washing machine (100) according to claim 8, wherein all the drum walls of the drum (110) are formed of the ferromagnetic material. Washing machine (100) according to one of claims 8 to 9, wherein the at least one electrical coil (120) is flat and / or formed of copper. A washing machine (100) according to any one of claims 8 to 10, comprising a tub (140), wherein the drum (110) is disposed within the tub (140), wherein the at least one electrical coil (120) is disposed on the tub (140) is. A washing machine (100) according to any one of claims 8 to 11, wherein the at least one electrical coil (120) is external to one between the drum (110) and a floor the washing machine (100) arranged bottom portion in the washing machine (100) is arranged. A washing machine (100) according to any one of claims 8 to 12, comprising at least one shield member (150) for shielding a magnetic field generated by the at least one electrical coil (120) away from the drum (110). Washing machine (100) according to claim 13, wherein the at least one shielding element (150) comprises at least one ferrite plate and / or at least one aluminum plate. A computer program product with program code for performing a method (500) according to any one of claims 4 to 6 when the computer program product is executed on a device (160).

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