EP3276072B1 - Method for the treatment of laundry in a laundry treating machine and laundry treating machine for the treatment of laundry - Google Patents

Method for the treatment of laundry in a laundry treating machine and laundry treating machine for the treatment of laundry Download PDF

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Publication number
EP3276072B1
EP3276072B1 EP17180550.0A EP17180550A EP3276072B1 EP 3276072 B1 EP3276072 B1 EP 3276072B1 EP 17180550 A EP17180550 A EP 17180550A EP 3276072 B1 EP3276072 B1 EP 3276072B1
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EP
European Patent Office
Prior art keywords
drum
laundry
process air
temperature
speed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17180550.0A
Other languages
German (de)
French (fr)
Other versions
EP3276072A1 (en
Inventor
Florian Lückebergfeld
Marco Rüchel
Alexander Löffler
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Miele und Cie KG
Original Assignee
Miele und Cie KG
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Application filed by Miele und Cie KG filed Critical Miele und Cie KG
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity
    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/04—Quantity, e.g. weight or variation of weight
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/06—Type or material
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/08—Humidity
    • 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
    • D06F2103/28—Air properties
    • D06F2103/32—Temperature
    • 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
    • D06F2103/28—Air properties
    • D06F2103/34—Humidity
    • 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
    • D06F2103/38—Time, e.g. duration
    • 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
    • D06F2103/44—Current or voltage
    • 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
    • D06F2105/28—Electric heating
    • 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
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/26—Heating arrangements, e.g. gas heating equipment

Definitions

  • the invention relates to a method for treating laundry in a laundry treatment machine, a corresponding device and a corresponding computer program product and a laundry treatment machine for treating laundry.
  • the DE 10 2009 026 646 A1 describes a method for treating laundry in a washing machine by means of induction heating.
  • the EP 2 388 369 A2 describes a laundry treating machine for treating laundry, wherein a drum for receiving the laundry comprises at least one drum wall of a ferromagnetic material.
  • the object of the invention is to provide an improved method for treating laundry in a laundry treating machine, an improved apparatus and an improved computer program product and an improved laundry machine for treating laundry.
  • this object is achieved by a method for treating laundry, by a method for operating a laundry treatment machine, by a corresponding device and by a corresponding computer program product and by a laundry treatment machine for treating laundry having the features of the main claims.
  • the achievable with the present invention consist in addition to a reliable and rapid treatment of laundry and a saving of energy, especially in reactivating impregnations in a gentle treatment of the laundry.
  • induction heating for example, a heat pump during the Treatment of the laundry, in particular the reactivation of an impregnation, remain switched off and it can be achieved quickly desired temperatures.
  • the reactivation can be reduced in particular to a minimum program duration, for example 30 minutes or the like.
  • energy consumption and abrasion of an impregnation can be reduced.
  • the induction-heated drum can act like an iron, especially at start-up speed, which is often recommended for reactivating impregnations.
  • temperatures can be achieved, which allow a reliable reactivation of impregnation. It can also be saved time and energy to reach the required temperatures, since a heat pump, which would generate unnecessary cold for the reactivation, this can remain off.
  • a heating-up phase can be shortened and thus use a reactivation of the impregnation earlier, wherein a rubbing off of the impregnation by washing movement can be reduced or minimized.
  • the reactivation is carried out by heat input via the process air, in particular by the inductively heated drum energy can be saved.
  • the method may be practiced in conjunction with or using one embodiment of a laundry treating machine mentioned below.
  • the eddy currents can be induced by means of an electrical signal applied to the at least one electrical coil.
  • the laundry treating machine can be designed as a tumble dryer, a washer-dryer or the like, in particular as a heat pump laundry dryer with induction.
  • a drum wall can do one Represent drum shell.
  • the at least one electrical coil can be arranged outside the drum.
  • the drum may be rotatable relative to the at least one electrical coil.
  • the drum may include a drive unit that may be configured to rotate the drum.
  • the step of driving can be carried out continuously. In this case, a speed can be adjusted and additionally or alternatively changed at least once.
  • a ratio of a period of driving the drum to the apply speed at a period of driving the drum at the laundry speed may be set at least depending on a laundry type and additionally or alternatively a loading amount of the laundry in the drum, and additionally or alternatively varied become.
  • the duration of the application speed may be increased the more sensitive the type of laundry is. Also, in the step of driving, the shorter the loading amount of laundry in the drum, the longer the duration of the application speed can be increased.
  • the drum can optionally be driven continuously with the application speed. Such an embodiment offers the advantage that a mechanical load of sensitive laundry can be reduced.
  • the length of time of the laundry fall speed can be increased, the higher the loading amount of laundry in the drum and additionally or alternatively the larger laundry items of the laundry.
  • Such an embodiment offers the advantage that a thorough mixing and uniform heating of the laundry can be effected.
  • the drum in the step of driving, may be driven in a single direction of rotation.
  • Such an embodiment offers the advantage that in the case of coupled with a drum drive fan, the process air flow can be maintained evenly.
  • the drum in the step of driving the drum can be driven in alternating directions of rotation.
  • Such an embodiment offers the advantage that a mixing of the laundry can be further improved by reversing.
  • the drum in the step of inducing, can be heated to a predefined maximum temperature until a temperature of the process air emerging from the drum reaches a setpoint temperature.
  • the step of inducing, the step of causing and the step of driving may be performed for a treatment period when a temperature of the process air exiting the drum has reached a target temperature.
  • the temperature of the process air can be maintained at the desired temperature during the treatment period.
  • the step of inducing, the step of causing and the step of driving may be carried out for a treatment period when a residual moisture of the laundry has reached a predefinable value and a temperature of the process air exiting the drum has reached a target temperature.
  • the temperature of the process air can be maintained at the desired temperature during the treatment period.
  • the drum may be heated to achieve a refreshing temperature of the process air exiting the drum to refresh a laundry impregnation.
  • the refresh temperature may represent a target temperature.
  • the method may be practiced in conjunction with or using one embodiment of a laundry treating machine mentioned below.
  • the method can be implemented by an embodiment of a device mentioned below or by a control device.
  • 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.
  • 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 laundry treating machine mentioned below may comprise the apparatus. Also by 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.
  • 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.
  • an embodiment of the above-mentioned apparatus can be advantageously used to operate the laundry treating machine.
  • a 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.
  • a machine-readable carrier or storage medium such as a semiconductor memory, a hard disk memory or an optical memory.
  • 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.
  • a direction of rotation of a laundry drum can be changed at a clock frequency of, for example, 1: 1 (eg 60/60 seconds). This may be different for a clothes dryer with heat pump. In the case of attachment of an impeller on a shaft of a drum drive motor, this also changes the direction of rotation and generates, for example, under certain circumstances, a fraction of the process air flow in the other direction. For this reason, for example, it is often intended to reverse for a short or shorter time (eg 300/10 seconds).
  • FIG. 1 shows a schematic representation of a laundry treatment machine 100 for treating laundry according to an embodiment of the invention.
  • the laundry treating machine 100 is embodied here as a tumble dryer, a washer-dryer or the like.
  • the laundry treating machine 100 may also be referred to as a laundry care appliance.
  • the laundry treating machine 100 is implemented as a heat pump tumble dryer with induction.
  • the laundry treating machine 100 has a drum 110 for receiving the laundry.
  • the drum 110 is rotatably supported in the laundry treating machine 100.
  • the drum 110 is rotatably mounted in at least one direction of rotation 140.
  • the drum 110 may have a drive unit for driving or rotating the drum.
  • At least one wall or drum wall of the drum 110 is formed of a ferromagnetic material.
  • all the drum walls of the drum 110 are formed of the ferromagnetic material.
  • the laundry treating machine 100 has an electric coil 120 by way of example.
  • the electrical coil 120 is used to induce eddy currents in 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.
  • the electrical coil 120 is formed as a flat coil or planar, for example with turns of copper.
  • the laundry treating machine 100 may include a plurality of electrical coils 120.
  • the laundry treating machine 100 has according to the in FIG. 1 shown embodiment of the invention, a process air blower 130.
  • the process air blower 130 is designed to effect a volume flow of process air 135 or a process air flow 135 through the drum 110.
  • the laundry treatment machine 100 also has an operating device 150 or device 150 for operating the laundry treatment machine 100.
  • the operating device 150 is, for example, a control device or the like.
  • the operating device 150 is configured to control at least the drum 110, the at least one electric coil 120 and the process air blower 130.
  • the operating device 150 is signal transmitting capable with the drum 110, which connects at least one electric coil 120 and the process air blower 130.
  • the operating device 150 has a contact device 152.
  • the applying means 152 is configured to apply an electrical signal 162 for inducing eddy currents in the at least one drum wall for heating the drum 110 to the electric coil 120.
  • the electrical signal 162 may be a high frequency alternating electrical voltage.
  • the operating device 150 also has an output device 154.
  • the dispenser 154 is configured to apply a blower signal 164 to the process air blower 130 to cause the process airflow 135 through the drum 110.
  • the operating device 150 also has a provision device 156.
  • the delivery device 156 is configured to provide a drive signal 166 to the drum 110 to drive the drum 110 between a apply speed at which laundry received in the drum 110 engages the drum wall upon rotational movement of the drum 110 and a wash stall speed in the drum 110 recorded laundry falls upon a rotational movement of the drum 110 of the drum wall.
  • the operating device 150 is formed, the steps of a method of one of FIGS. 4 and 5 or a similar procedure.
  • FIG. 2 shows a schematic drum speed-time diagram 200 for a laundry treating machine according to an embodiment of the invention.
  • the laundry treatment machine is the laundry treatment machine FIG. 1 or a similar laundry treatment machine.
  • the time t is plotted on an abscissa axis of the diagram 200, wherein on the ordinate axis of the diagram 200, the drum speed n is plotted.
  • the drum speed n represents a rotational speed of the drum of the laundry treating machine.
  • a graph 210 is plotted, which represents a course of the drum speed n over the time t.
  • the graph 210 is exemplary similar to a square wave signal.
  • the graph 210 periodically switches between an apply speed 202 representing an upper speed level and a wash speed 204 representing a lower speed level.
  • FIG. 3 shows a schematic temperature-time diagram 300 for a laundry treating machine according to an embodiment of the invention.
  • the laundry treatment machine is the laundry treatment machine FIG. 1 or a similar laundry treatment machine.
  • the time t is plotted on an abscissa axis of the diagram 300, wherein temperatures ⁇ are plotted on the ordinate axis of the diagram 300.
  • a first graph 310 which represents a profile of a drum wall temperature or drum jacket temperature of the drum of the laundry treatment machine.
  • a second graph 320 is also shown, which represents a profile of a process air temperature of a volume flow of process air in the laundry treatment machine.
  • a first time t1 and a second time t2 are plotted.
  • a first time period before the first time t1 represents a heating-up phase
  • a second time duration between the first time t1 and the second time t2 represents a phase of control after the drum jacket temperature
  • a third time period after the second time t2 represents a phase of control after the drum time Process air temperature represents.
  • a treatment time period 330 or a temperature hold time 330 is also shown in the diagram 300, in particular for fixing an impregnation.
  • the treatment period 330 is arranged after the second time t2 or in the phase of the control after the process air temperature.
  • the first graph 310 rises during the heating phase to a predefined maximum temperature, which represents a target temperature for inductive heating of the drum between the first time t1 and the second time t2. After the second time t2, the first graph 310 drops off by way of example.
  • the second graph 320 rises to a target temperature for the process air maintained during the treatment period 330 until the second time t2.
  • FIG. 4 shows a flowchart of a method 400 for treating laundry according to an embodiment of the invention.
  • the method 400 is in this case in connection with the laundry treatment machine FIG. 1 or a similar laundry treatment machine executable.
  • the method 400 can be executed in particular using the drum, the at least one electrical coil, the process air blower and the operating device.
  • the method 400 for treating includes a step 410 of inducing eddy currents in at least one ferromagnetic drum wall of a drum to receive the laundry to heat the drum. Also, the method 400 for treating includes a step 420 of causing a volume flow of process air through the drum. The method 400 for treating further comprises a step 430 of driving the drum between an application speed at which the laundry accommodated in the drum preferably rests continuously against the drum wall during a rotational movement of the drum, and a laundry speed at which laundry received in the drum at a rotational movement of the drum releases from the drum wall and falls down.
  • the step 430 of driving can be carried out continuously. Also, the step 410 of inducing and the step 420 of causing can be performed continuously. At this time, the step 410 of inducing, the step 420 of causing and the step 430 of driving may be performed at least temporarily in parallel.
  • step 430 of the driving alternately between the application speed and the laundry speed is changed.
  • a ratio of a period of driving the drum to the application speed at a time of driving the drum at the laundry speed is set and / or varied at least depending on a type of laundry and / or a load of the laundry in the drum .
  • the duration of the application speed increases, the more sensitive the type of laundry, and / or increases the length of the laundry cycle speed, the higher the load of laundry in the drum and / or the larger laundry items of the laundry
  • step 430 of driving the drum is driven in a single direction of rotation or driven in alternate directions of rotation.
  • step 420 of inducing the drum is heated to a predefined maximum temperature until a temperature of the process air exiting the drum reaches a set temperature.
  • the step 410 of inducing, the step 420 of causing and the step 430 of driving is performed for at least one treatment period when a temperature of the process air exiting the drum has reached a target temperature.
  • the temperature of the process air is maintained at the desired temperature during the treatment period.
  • the treatment period additionally begins when a residual moisture content of the laundry has reached a predefinable value.
  • step 410 of inducing the drum is heated to achieve a refreshing temperature of the process air exiting the drum for refreshing an impregnation of the laundry.
  • FIG. 5 shows a flow chart of a method 500 for operation according to an embodiment of the invention.
  • the method 500 is executable to operate a laundry treating machine.
  • the laundry treatment machine is the laundry treatment machine FIG. 1 or a similar laundry treating machine having a drum for receiving laundry, the drum having at least one ferromagnetic wall drum wall, at least one electrical coil located adjacent to the drum, and a process air blower.
  • the method 500 is in conjunction with or using the operating device FIG. 1 or a similar operating device executable.
  • the method 500 for operating includes a step 510 of 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. Also, the method 500 includes operating step 520 of outputting a blower signal to the process air blower to effect a flow of process air through the drum. In addition, the method 500 of operation includes a step 530 of providing a drive signal to the drum to drive the drum between an apply speed at which laundry received in the drum contacts the drum wall upon rotation of the drum and a tumble speed at which in the drum recorded laundry falls upon a rotational movement of the drum of the drum wall.
  • step 510 of the application, the step 520 of the output and / or the step 530 of the provision can be carried out in parallel and / or continuously.
  • an impregnated laundry to be reactivated is placed dry in the laundry treating machine 100 configured as a tumble dryer.
  • the drum 110 or washing drum 110 rotates at a speed n at which the laundry is applied, ie with the application speed 202, which is for example at least 60 min -1 .
  • By induction heating is heated to a process air temperature after the drum 110 of 60 degrees Celsius. This setpoint temperature is maintained during the treatment period 330, for example 20 minutes.
  • an optionally arranged in the laundry treatment machine 100 heat pump system remain switched off, since no reactivation of an impregnation drying of the laundry is required. If a post-impregnation of the laundry treatment machine 100 has previously taken place, a heat pump can be added in order to dry the laundry before the fixation or reactivation.
  • the process air blower 130 is continuously activated at least during the treatment period 330.
  • Reversing the drum 110 is optional.
  • a so-called wash ring is dissolved by speed change to rearrange the laundry by, for example, cyclically switching between apply speed 202 and wash speed 204 to achieve high wash temperatures that may, for example, approximately equal the process air temperature to drum 110 and uniform drying.
  • the settling speed 202 may represent, for example, a drum speed of 60 to 80 min -1.
  • the temperature of the at least one drum wall of the drum 110 or a drum jacket temperature can be limited to a maximum temperature, for example to 100 degrees Celsius.
  • the drum shell temperature is constantly controlled in step 410 of inducing and in step 510 of applying, respectively.
  • the maximum process air temperature is controlled according to this and the drum shell temperature decreases, for example.
  • the treatment of the laundry may include impregnation / reactivation without the use of a heat pump, with rapid heating at maximum drum jacket temperature to, for example, 60 ° C. process air temperature and then, for example, 20 minutes time drying controlled by the process air temperature.
  • a drying of pretreated laundry and then an impregnation / reactivation which applies to the aforementioned embodiment applies, wherein the time drying, for example, but only when reaching the defined process air temperature and a predetermined residual moisture, for example, 0 percent residual moisture or the like begins , The predetermined residual moisture can be variably adjusted.
  • the drum speed n between the application speed 202 and the laundry speed 204 can be changed.
  • the time relationship between the application speed 202 and the laundry speed 204 or a clock frequency depending on the type of laundry and load amount of laundry in the drum 110 can be varied or adjusted.
  • the more sensitive the laundry the higher a proportion of the application speed 202 can be selected in order to load the laundry less mechanically and thus to protect it.
  • the larger the items of laundry the higher a proportion of the laundry speed 204 can be selected in order to dry the laundry evenly.

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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 Behandeln von Wäsche in einer Wäschebehandlungsmaschine, eine entsprechende Vorrichtung sowie ein entsprechendes Computer-Programmprodukt und eine Wäschebehandlungsmaschine zum Behandeln von Wäsche.The invention relates to a method for treating laundry in a laundry treatment machine, a corresponding device and a corresponding computer program product and a laundry treatment machine for treating laundry.

Bei Textilien mit Imprägnierung kann diese mit der Zeit ihre Wirkung verlieren. Oft ist beispielsweise keine neue Imprägnierung nötig, sondern ein Reaktivieren kann genügen. Dieses kann insbesondere Prozesslufttemperaturen von beispielhaft über 60°C idealerweise auch noch nach Durchströmen der Trommel erfordern. Solche Temperaturen können in einem Wäschetrockner mit Beheizung mittels Wärmepumpe unter Umständen schwierig zu erreichen sein.For textiles with impregnation, this can lose their effect over time. Often, for example, no new impregnation is necessary, but a reactivation may suffice. In particular, this may require process air temperatures of, for example, more than 60 ° C., even after flowing through the drum. Such temperatures may be difficult to achieve in a tumble dryer with heat pump heating.

Die DE 10 2009 026 646 A1 beschreibt ein Verfahren zur Behandlung von Wäsche in einer Waschmaschine mittels einer Induktionsheizung.The DE 10 2009 026 646 A1 describes a method for treating laundry in a washing machine by means of induction heating.

Die EP 2 388 369 A2 beschreibt eine Wäschebehandlungsmaschine zum Behandeln von Wäsche, bei der eine Trommel zur Aufnahme der Wäsche zumindestens eine Trommelwand aus einem ferromagnetischen Material aufweist.The EP 2 388 369 A2 describes a laundry treating machine for treating laundry, wherein a drum for receiving the laundry comprises at least one drum wall of a ferromagnetic material.

Der Erfindung stellt sich die Aufgabe, ein verbessertes Verfahren zum Behandeln von Wäsche in einer Wäschebehandlungsmaschine, eine verbesserte Vorrichtung sowie ein verbessertes Computer-Programmprodukt und eine verbesserte Wäschebehandlungsmaschine zum Behandeln von Wäsche bereitzustellen.The object of the invention is to provide an improved method for treating laundry in a laundry treating machine, an improved apparatus and an improved computer program product and an improved laundry machine for treating laundry.

Erfindungsgemäß wird diese Aufgabe durch ein Verfahren zum Behandeln von Wäsche, durch ein Verfahren zum Betreiben einer Wäschebehandlungsmaschine, durch eine entsprechende Vorrichtung sowie durch ein entsprechendes Computer-Programmprodukt und durch eine Wäschebehandlungsmaschine zum Behandeln von Wäsche mit den Merkmalen der Hauptansprüche 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 treating laundry, by a method for operating a laundry treatment machine, by a corresponding device and by a corresponding computer program product and by a laundry treatment machine for treating laundry having the features of the main claims. Advantageous embodiments and further developments of the invention will become apparent from the following subclaims.

Die mit der Erfindung erreichbaren Vorteile bestehen neben einer zuverlässigen und schnellen Behandlung von Wäsche sowie einer Einsparung von Energie insbesondere bei einem Reaktivieren von Imprägnierungen auch in einer schonenden Behandlung der Wäsche. Durch Induktionsheizung kann beispielsweise eine Wärmepumpe während der Behandlung der Wäsche, insbesondere der Reaktivierung einer Imprägnierung, ausgeschaltet bleiben und es können schnell erwünschte Temperaturen erreicht werden. Die Reaktivierung kann insbesondere auf eine minimale Programmdauer, beispielhaft 30 Minuten oder dergleichen, reduziert werden. So können insbesondere ein Energieverbrauch und ein Abrieb einer Imprägnierung reduziert werden. Somit können erhöhte Geschwindigkeit und Energieeinsparung vereint werden. Die induktionsbeheizte Trommel kann insbesondere bei Anlegedrehzahl wie ein Bügeleisen wirken, was häufig zur Reaktivierung von Imprägnierungen empfohlen wird. Anders als bei einem reinen Wärmepumpen-Wäschetrockner ohne Induktion können Prozesslufttemperaturen erreicht werden, welche ein zuverlässiges Reaktivieren einer Imprägnierung ermöglichen. Es können ferner Zeit und Energie zum Erreichen der erforderlichen Temperaturen eingespart werden, da eine Wärmepumpe, welche für den Reaktiviervorgang unnötige Kälte erzeugen würde, hierbei ausgeschaltet bleiben kann. Eine Aufheizphase kann verkürzt werden und somit eine Reaktivierung der Imprägnierung früher einsetzen, wobei ein Abreiben der Imprägnierung durch Wäschebewegung verringert bzw. minimiert werden kann. Die Reaktivierung erfolgt durch Wärmeeintrag über die Prozessluft, wobei insbesondere durch die induktiv beheizte Trommel Energie eingespart werden kann.The achievable with the present invention consist in addition to a reliable and rapid treatment of laundry and a saving of energy, especially in reactivating impregnations in a gentle treatment of the laundry. By induction heating, for example, a heat pump during the Treatment of the laundry, in particular the reactivation of an impregnation, remain switched off and it can be achieved quickly desired temperatures. The reactivation can be reduced in particular to a minimum program duration, for example 30 minutes or the like. In particular, energy consumption and abrasion of an impregnation can be reduced. Thus, increased speed and energy saving can be combined. The induction-heated drum can act like an iron, especially at start-up speed, which is often recommended for reactivating impregnations. Unlike a pure heat pump tumble dryer without induction process air temperatures can be achieved, which allow a reliable reactivation of impregnation. It can also be saved time and energy to reach the required temperatures, since a heat pump, which would generate unnecessary cold for the reactivation, this can remain off. A heating-up phase can be shortened and thus use a reactivation of the impregnation earlier, wherein a rubbing off of the impregnation by washing movement can be reduced or minimized. The reactivation is carried out by heat input via the process air, in particular by the inductively heated drum energy can be saved.

Es wird ein Verfahren zum Behandeln von Wäsche in einer Wäschebehandlungsmaschine vorgestellt, wobei die Wäschebehandlungsmaschine eine Trommel zum Aufnehmen der Wäsche aufweist, wobei die Trommel zumindest eine Trommelwand aus einem ferromagnetischen Material aufweist, wobei das Verfahren zumindest folgende Schritte aufweist:

  • Induzieren von Wirbelströmen in der zumindest einen Trommelwand der Trommel, um die Trommel zu erwärmen;
  • Bewirken eines Volumenstroms von Prozessluft durch die Trommel hindurch; und
  • Antreiben der Trommel zwischen einer Anlegedrehzahl, bei der in der Trommel aufgenommene Wäsche bei einer Drehbewegung der Trommel an der Trommelwand anliegt, und einer Wäschefalldrehzahl, bei der in der Trommel aufgenommene Wäsche bei einer Drehbewegung der Trommel von der Trommelwand fällt.
A method for treating laundry in a laundry treating machine is presented, wherein the laundry treating machine comprises a drum for receiving the laundry, wherein the drum has at least one drum wall made of a ferromagnetic material, the method having at least the following steps:
  • Inducing eddy currents in the at least one drum wall of the drum to heat the drum;
  • Causing a volume flow of process air through the drum; and
  • Driving the drum between an application speed, wherein the recorded in the drum laundry during a rotational movement of the drum to the drum wall, and a Wäschefalldrehzahl, wherein the recorded in the drum laundry falls upon a rotational movement of the drum of the drum wall.

Das Verfahren kann in Verbindung mit bzw. unter Verwendung von einer Ausführungsform einer nachstehend genannten Wäschebehandlungsmaschine ausgeführt werden. Die Wirbelströme können mittels eines an die zumindest eine elektrische Spule angelegten elektrischen Signals induziert werden. Die Wäschebehandlungsmaschine kann als ein Wäschetrockner, ein Waschtrockner oder dergleichen, insbesondere als Wärmepumpen-Wäschetrockner mit Induktion, ausgeführt sein. Eine Trommelwand kann einen Trommelmantel repräsentieren. Die zumindest eine elektrische Spule kann außerhalb der Trommel angeordnet sein. Die Trommel kann relativ zu der zumindest einen elektrischen Spule drehbar angeordnet sein. Auch kann die Trommel eine Antriebseinheit aufweisen, die ausgebildet sein kann, um die Trommel zu drehen. Der Schritt des Antreibens kann kontinuierlich ausgeführt werden. Dabei kann eine Drehzahl eingestellt und zusätzlich oder alternativ zumindest einmal verändert werden.The method may be practiced in conjunction with or using one embodiment of a laundry treating machine mentioned below. The eddy currents can be induced by means of an electrical signal applied to the at least one electrical coil. The laundry treating machine can be designed as a tumble dryer, a washer-dryer or the like, in particular as a heat pump laundry dryer with induction. A drum wall can do one Represent drum shell. The at least one electrical coil can be arranged outside the drum. The drum may be rotatable relative to the at least one electrical coil. Also, the drum may include a drive unit that may be configured to rotate the drum. The step of driving can be carried out continuously. In this case, a speed can be adjusted and additionally or alternatively changed at least once.

Erfindungsgemäß kann im Schritt des Antreibens alternierend zwischen der Anlegedrehzahl und der Wäschefalldrehzahl gewechselt werden. Eine solche Ausführungsform bietet den Vorteil, dass eine zuverlässige Durchmischung und eine gleichmäßige Erwärmung der Wäsche erreicht werden können.According to the invention, in the step of driving alternately between the application speed and the spin speed can be changed. Such an embodiment has the advantage that a reliable mixing and uniform heating of the laundry can be achieved.

Auch kann im Schritt des Antreibens ein Verhältnis einer Zeitdauer eines Antreibens der Trommel mit der Anlegedrehzahl zu einer Zeitdauer eines Antreibens der Trommel mit der Wäschefalldrehzahl zumindest in Abhängigkeit von einer Wäscheart und zusätzlich oder alternativ einer Beladungsmenge der Wäsche in der Trommel eingestellt und zusätzlich oder alternativ variiert werden. Eine solche Ausführungsform bietet den Vorteil, dass je nach Empfindlichkeit und Menge der Wäsche in der Trommel eine energiesparende, schnelle, zuverlässige und schonende Behandlung der Wäsche ermöglicht werden kann.Also, in the step of driving, a ratio of a period of driving the drum to the apply speed at a period of driving the drum at the laundry speed may be set at least depending on a laundry type and additionally or alternatively a loading amount of the laundry in the drum, and additionally or alternatively varied become. Such an embodiment has the advantage that depending on the sensitivity and amount of laundry in the drum energy-saving, fast, reliable and gentle treatment of the laundry can be made possible.

Gemäß einer Ausführungsform kann im Schritt des Antreibens die Zeitdauer der Anlegedrehzahl erhöht werden, je empfindlicher die Wäscheart ist. Auch kann im Schritt des Antreibens die Zeitdauer der Anlegedrehzahl erhöht werden, je geringer die Beladungsmenge von Wäsche in der Trommel ist. Die Trommel kann optional kontinuierlich mit der Anlegedrehzahl angetrieben werden. Eine solche Ausführungsform bietet den Vorteil, dass eine mechanische Belastung empfindlicher Wäsche verringert werden kann.According to an embodiment, in the step of driving, the duration of the application speed may be increased the more sensitive the type of laundry is. Also, in the step of driving, the shorter the loading amount of laundry in the drum, the longer the duration of the application speed can be increased. The drum can optionally be driven continuously with the application speed. Such an embodiment offers the advantage that a mechanical load of sensitive laundry can be reduced.

Zudem kann im Schritt des Antreibens die Zeitdauer der Wäschefalldrehzahl erhöht werden, je höher die Beladungsmenge von Wäsche in der Trommel ist und zusätzlich oder alternativ je größer Wäschestücke der Wäsche sind. Eine solche Ausführungsform bietet den Vorteil, dass eine gründliche Durchmischung und gleichmäßige Erwärmung der Wäsche bewirkt werden können.In addition, in the step of driving, the length of time of the laundry fall speed can be increased, the higher the loading amount of laundry in the drum and additionally or alternatively the larger laundry items of the laundry. Such an embodiment offers the advantage that a thorough mixing and uniform heating of the laundry can be effected.

Gemäß einer Ausführungsform kann im Schritt des Antreibens die Trommel in eine einzige Drehrichtung angetrieben werden. Eine solche Ausführungsform bietet den Vorteil, dass im Falle von mit einem Trommelantrieb gekoppeltem Lüfter der Prozessluftstrom gleichmäßig beibehalten werden kann.In one embodiment, in the step of driving, the drum may be driven in a single direction of rotation. Such an embodiment offers the advantage that in the case of coupled with a drum drive fan, the process air flow can be maintained evenly.

Zusätzlich oder alternativ kann im Schritt des Antreibens die Trommel in wechselnde Drehrichtungen angetrieben werden. Eine solche Ausführungsform bietet den Vorteil, dass durch Reversieren eine Durchmischung der Wäsche weiter verbessert werden kann.Additionally or alternatively, in the step of driving the drum can be driven in alternating directions of rotation. Such an embodiment offers the advantage that a mixing of the laundry can be further improved by reversing.

Insbesondere kann im Schritt des Induzierens die Trommel auf eine vordefinierte Maximaltemperatur erwärmt werden, bis eine Temperatur der aus der Trommel austretenden Prozessluft eine Solltemperatur erreicht. Eine solche Ausführungsform bietet den Vorteil, dass ein Aufheizen auf eine zur Behandlung der Wäsche vorgesehene Temperatur schnell und energiesparend erfolgen kann.In particular, in the step of inducing, the drum can be heated to a predefined maximum temperature until a temperature of the process air emerging from the drum reaches a setpoint temperature. Such an embodiment has the advantage that heating to a temperature intended for the treatment of the laundry can be carried out quickly and in an energy-saving manner.

Auch können der Schritt des Induzierens, der Schritt des Bewirkens und der Schritt des Antreibens für eine Behandlungszeitdauer ausgeführt werden, wenn eine Temperatur der aus der Trommel austretenden Prozessluft eine Solltemperatur erreicht hat. Hierbei kann die Temperatur der Prozessluft während der Behandlungszeitdauer auf der Solltemperatur gehalten werden. Eine solche Ausführungsform bietet den Vorteil, dass die Behandlung der Wäsche, insbesondere ein Reaktivieren einer Imprägnierung, zuverlässig und schnell durchgeführt werden kann.Also, the step of inducing, the step of causing and the step of driving may be performed for a treatment period when a temperature of the process air exiting the drum has reached a target temperature. In this case, the temperature of the process air can be maintained at the desired temperature during the treatment period. Such an embodiment offers the advantage that the treatment of the laundry, in particular a reactivation of an impregnation, can be carried out reliably and quickly.

Ferner können der Schritt des Induzierens, der Schritt des Bewirkens und der Schritt des Antreibens für eine Behandlungszeitdauer ausgeführt werden, wenn eine Restfeuchte der Wäsche einen vordefinierbaren Wert erreicht hat und eine Temperatur der aus der Trommel austretenden Prozessluft eine Solltemperatur erreicht hat. Hierbei kann die Temperatur der Prozessluft während der Behandlungszeitdauer auf der Solltemperatur gehalten werden. Eine solche Ausführungsform bietet den Vorteil, dass sowohl die Behandlung der Wäsche, insbesondere ein Reaktivieren einer Imprägnierung, zuverlässig und schnell durchgeführt werden kann als auch eine Trocknung feuchter, gewaschener und zusätzlich oder alternativ frisch imprägnierter Wäsche effizient erfolgen kann.Further, the step of inducing, the step of causing and the step of driving may be carried out for a treatment period when a residual moisture of the laundry has reached a predefinable value and a temperature of the process air exiting the drum has reached a target temperature. In this case, the temperature of the process air can be maintained at the desired temperature during the treatment period. Such an embodiment offers the advantage that both the treatment of the laundry, in particular a reactivation of an impregnation, can be carried out reliably and quickly, and a drying of wet, washed and additionally or alternatively freshly impregnated laundry can be carried out efficiently.

Es kann im Schritt des Induzierens die Trommel erwärmt werden, um eine zum Auffrischen einer Imprägnierung der Wäsche geeignete Auffrischtemperatur der aus der Trommel austretenden Prozessluft zu erreichen. Die Auffrischtemperatur kann eine Solltemperatur repräsentieren. Eine solche Ausführungsform bietet den Vorteil, dass eine Imprägnierung der Wäsche sicher, schnell und energiesparend aufgefrischt bzw. reaktiviert werden kann.In the step of inducing, the drum may be heated to achieve a refreshing temperature of the process air exiting the drum to refresh a laundry impregnation. The refresh temperature may represent a target temperature. Such an embodiment has the advantage that an impregnation of the laundry can be refreshed or reactivated safely, quickly and energy-saving.

Es wird auch ein Verfahren zum Betreiben einer Wäschebehandlungsmaschine vorgestellt, wobei die Wäschebehandlungsmaschine eine Trommel zum Aufnehmen von Wäsche, wobei die Trommel zumindest eine Trommelwand aus einem ferromagnetischen Material aufweist, zumindest eine benachbart zu der Trommel angeordnete elektrische Spule und ein Prozessluftgebläse aufweist, wobei das Verfahren zumindest folgende Schritte aufweist:

  • Anlegen eines elektrischen Signals an die zumindest eine elektrische Spule, um Wirbelströme in der zumindest einen Trommelwand zu induzieren, um die Trommel zu erwärmen;
  • Ausgeben eines Gebläsesignals an das Prozessluftgebläse, um einen Volumenstrom von Prozessluft durch die Trommel hindurch zu bewirken; und
  • Bereitstellen eines Antriebssignals an die Trommel, um die Trommel zwischen einer Anlegedrehzahl, bei der in der Trommel aufgenommene Wäsche bei einer Drehbewegung der Trommel an der Trommelwand anliegt, und einer Wäschefalldrehzahl anzutreiben, bei der in der Trommel aufgenommene Wäsche bei einer Drehbewegung der Trommel von der Trommelwand fällt.
There is also provided a method of operating a laundry treating machine, the laundry treating machine comprising a drum for receiving laundry, the drum including at least one ferromagnetic material drum wall, at least one electrical coil disposed adjacent the drum, and a process air blower 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;
  • Outputting a blower signal to the process air blower to effect a volume flow of process air through the drum; and
  • Providing a drive signal to the drum to drive the drum between a apply speed at which laundry received in the drum abuts on the drum wall upon rotational movement of the drum and a tumble speed at the drum received laundry upon rotation of the drum Drum wall drops.

Das Verfahren kann in Verbindung mit bzw. unter Verwendung von einer Ausführungsform einer nachstehend genannten Wäschebehandlungsmaschine ausgeführt werden. Das Verfahren kann insbesondere durch eine Ausführungsform einer nachstehend genannten Vorrichtung oder durch ein Steuergerät ausführbar sein. Es kann im Schritt des Anlegens beispielsweise eine hochfrequente elektrische Wechselspannung als elektrisches Signal angelegt werden, um ein magnetisches Wechselfeld zu erzeugen, mit dem die zumindest eine Trommelwand beaufschlagbar ist.The method may be practiced in conjunction with or using one embodiment of a laundry treating machine mentioned below. In particular, the method can be implemented by an embodiment of a device mentioned below or by a control device. In the step of applying, for example, 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.

Der hier vorgestellte Ansatz schafft ferner eine Vorrichtung, die ausgebildet ist, um die Schritte einer Variante eines hier vorgestellten Verfahrens in entsprechenden Einrichtungen durchzuführen, anzusteuern bzw. umzusetzen. Eine Ausführungsform einer nachstehend genannten Wäschebehandlungsmaschine kann die Vorrichtung aufweisen. 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 perform the steps of a variant of a method presented here in appropriate facilities to drive or implement. An embodiment of a laundry treating machine mentioned below may comprise the apparatus. Also by this embodiment of the invention in the form of a device, the object underlying the invention can be solved quickly and efficiently.

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 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.

Es wird ferner eine Wäschebehandlungsmaschine zum Behandeln von Wäsche vorgestellt, wobei die Wäschebehandlungsmaschine zumindest folgende Merkmale aufweist:

  • 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;
  • ein Prozessluftgebläse zum Bewirken eines Volumenstroms von Prozessluft durch die Trommel hindurch; und
  • eine Ausführungsform der vorstehend genannten Vorrichtung, wobei die Vorrichtung ausgebildet ist, um mindestens die Trommel, die zumindest eine elektrische Spule und das Prozessluftgebläse zu steuern.
A laundry treatment machine for treating laundry is also presented, wherein the laundry treatment 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 process air blower for effecting a volume flow of process air through the drum; 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 process air blower.

In Verbindung mit der Wäschebehandlungsmaschine ist eine Ausführungsform der vorstehend genannten Vorrichtung vorteilhaft einsetzbar, um die Wäschebehandlungsmaschine zu betreiben.In connection with the laundry treating machine, an embodiment of the above-mentioned apparatus can be advantageously used to operate the laundry treating machine.

Von Vorteil ist auch ein 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 und/oder Ansteuerung der Schritte des Verfahrens nach einer der vorstehend beschriebenen Ausführungsformen verwendet werden.Also of advantage is a 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. 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.

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

Figur 1
eine schematische Darstellung einer Wäschebehandlungsmaschine gemäß einem Ausführungsbeispiel der Erfindung;
Figur 2
ein schematisches Trommeldrehzahl-Zeit-Diagramm für eine Wäschebehandlungsmaschine gemäß einem Ausführungsbeispiel der Erfindung;
Figur 3
ein schematisches Temperatur-Zeit-Diagramm für eine Wäschebehandlungsmaschine gemäß einem Ausführungsbeispiel der Erfindung;
Figur 4
ein Ablaufdiagramm eines Verfahrens zum Behandeln von Wäsche gemäß einem Ausführungsbeispiel der Erfindung; und
Figur 5
ein Ablaufdiagramm eines Verfahrens zum Betreiben 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 laundry treatment machine according to an embodiment of the invention;
FIG. 2
a schematic drum speed-time diagram for a laundry treating machine according to an embodiment of the invention;
FIG. 3
a schematic temperature-time diagram for a laundry treating machine according to an embodiment of the invention;
FIG. 4
a flow chart of a method for treating laundry according to an embodiment of the invention; and
FIG. 5
a flowchart of a method of operation according to an embodiment of the invention.

Bevor nachfolgend Ausführungsbeispiele der Erfindung beschrieben werden, wird zunächst kurz auf Grundlagen und Hintergründe eingegangen. Für eine gleichmäßige Trocknung kann beispielsweise bei elektrisch beheizten Wäschetrocknern eine Rotationsrichtung einer Wäschetrommel in einer Taktfrequenz von beispielsweise 1:1 (z. B. 60/60 Sekunden) gewechselt werden. Dies kann bei einem Wäschetrockner mit Wärmepumpe anders sein. Im Falle einer Befestigung eines Gebläserades auf einer Welle eines Trommelantriebsmotors ändert dieses ebenfalls die Drehrichtung und erzeugt beispielsweise unter Umständen einen Bruchteil des Prozessluftstromes bei der anderen Drehrichtung. Aus diesem Grund ist beispielsweise häufig vorgesehen, kurz bzw. kürzer zu reversieren (z. B. 300/10 Sekunden).Before embodiments of the invention are described below, first briefly discusses the basics and backgrounds. For uniform drying, for example, in the case of electrically heated tumble dryers, a direction of rotation of a laundry drum can be changed at a clock frequency of, for example, 1: 1 (eg 60/60 seconds). This may be different for a clothes dryer with heat pump. In the case of attachment of an impeller on a shaft of a drum drive motor, this also changes the direction of rotation and generates, for example, under certain circumstances, a fraction of the process air flow in the other direction. For this reason, for example, it is often intended to reverse for a short or shorter time (eg 300/10 seconds).

Figur 1 zeigt eine schematische Darstellung einer Wäschebehandlungsmaschine 100 zum Behandeln von Wäsche gemäß einem Ausführungsbeispiel der Erfindung. Die Wäschebehandlungsmaschine 100 ist hierbei als ein Wäschetrockner, ein Waschtrockner oder dergleichen ausgeführt. Die Wäschebehandlungsmaschine 100 kann auch als ein Wäschepflegegerät bezeichnet werden. Insbesondere ist die Wäschebehandlungsmaschine 100 als ein Wärmepumpen-Wäschetrockner mit Induktion ausgeführt. FIG. 1 shows a schematic representation of a laundry treatment machine 100 for treating laundry according to an embodiment of the invention. The laundry treating machine 100 is embodied here as a tumble dryer, a washer-dryer or the like. The laundry treating machine 100 may also be referred to as a laundry care appliance. In particular, the laundry treating machine 100 is implemented as a heat pump tumble dryer with induction.

Die Wäschebehandlungsmaschine 100 weist eine Trommel 110 zum Aufnehmen der Wäsche auf. Die Trommel 110 ist in der Wäschebehandlungsmaschine 100 drehbar gelagert. Dabei ist die Trommel 110 in zumindest eine Drehrichtung 140 drehbar gelagert. Auch wenn es in Figur 1 nicht explizit gezeigt ist, kann die Trommel 110 eine Antriebseinheit zum Antreiben bzw. Drehen der Trommel aufweisen. Zumindest eine Wand bzw. Trommelwand der Trommel 110 ist aus einem ferromagnetischen Material ausgeformt. Optional sind alle Trommelwände der Trommel 110 aus dem ferromagnetischen Material ausgeformt.The laundry treating machine 100 has a drum 110 for receiving the laundry. The drum 110 is rotatably supported in the laundry treating machine 100. In this case, the drum 110 is rotatably mounted in at least one direction of rotation 140. Even if it is in FIG. 1 is not explicitly shown, the drum 110 may have a drive unit for driving or rotating the drum. 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.

Ferner weist die Wäschebehandlungsmaschine 100 beispielhaft eine elektrische Spule 120 auf. Die elektrische Spule 120 wird verwendet, um Wirbelströme in der zumindest einen Trommelwand der Trommel 110 zu induzieren. Durch die Wirbelströme wird die Trommel 110 erwärmt. Die elektrische Spule 120 ist benachbart zu der Trommel 110 angeordnet, sodass ein von der Spule 120 erzeugtes magnetisches Wechselfeld auf zumindest einen Abschnitt der Trommel 110 wirkt.Further, the laundry treating machine 100 has an electric coil 120 by way of example. The electrical coil 120 is used to induce eddy currents in 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.

Gemäß einem Ausführungsbeispiel ist die elektrische Spule 120 als eine Flachspule oder planar ausgeformt, beispielsweise mit Windungen aus Kupfer. Gemäß einem Ausführungsbeispiel kann die Wäschebehandlungsmaschine 100 eine Mehrzahl von elektrischen Spulen 120 aufweisen.According to one embodiment, the electrical coil 120 is formed as a flat coil or planar, for example with turns of copper. According to one embodiment, the laundry treating machine 100 may include a plurality of electrical coils 120.

Die Wäschebehandlungsmaschine 100 weist gemäß dem in Figur 1 gezeigten Ausführungsbeispiel der Erfindung auch ein Prozessluftgebläse 130 auf. Das Prozessluftgebläse 130 ist ausgebildet, um einen Volumenstrom von Prozessluft 135 bzw. einen Prozessluftstrom 135 durch die Trommel 110 hindurch zu bewirken.The laundry treating machine 100 has according to the in FIG. 1 shown embodiment of the invention, a process air blower 130. The process air blower 130 is designed to effect a volume flow of process air 135 or a process air flow 135 through the drum 110.

Die Wäschebehandlungsmaschine 100 weist auch eine Betriebsvorrichtung 150 bzw. Vorrichtung 150 zum Betreiben der Wäschebehandlungsmaschine 100 auf. Bei der Betriebsvorrichtung 150 handelt es sich beispielsweise um ein Steuergerät oder dergleichen. Die Betriebsvorrichtung 150 ist ausgebildet, um mindestens die Trommel 110, die zumindest eine elektrische Spule 120 und das Prozessluftgebläse 130 zu steuern. Somit ist die Betriebsvorrichtung 150 signalübertragungsfähig mit der Trommel 110, der zumindest einen elektrischen Spule 120 und dem Prozessluftgebläse 130 verbunden.The laundry treatment machine 100 also has an operating device 150 or device 150 for operating the laundry treatment machine 100. The operating device 150 is, for example, a control device or the like. The operating device 150 is configured to control at least the drum 110, the at least one electric coil 120 and the process air blower 130. Thus, the operating device 150 is signal transmitting capable with the drum 110, which connects at least one electric coil 120 and the process air blower 130.

Die Betriebsvorrichtung 150 weist eine Anlegeeinrichtung 152 auf. Die Anlegeeinrichtung 152 ist ausgebildet, um ein elektrisches Signal 162 zum Induzieren von Wirbelströmen in der zumindest einen Trommelwand zum Erwärmen der Trommel 110 an die elektrische Spule 120 anzulegen. Das elektrische Signal 162 kann eine hochfrequente elektrische Wechselspannung sein.The operating device 150 has a contact device 152. The applying means 152 is configured to apply an electrical signal 162 for inducing eddy currents in the at least one drum wall for heating the drum 110 to the electric coil 120. The electrical signal 162 may be a high frequency alternating electrical voltage.

Die Betriebsvorrichtung 150 weist ferner eine Ausgabeeinrichtung 154 auf. Die Ausgabeeinrichtung 154 ist ausgebildet, um ein Gebläsesignal 164 an das Prozessluftgebläse 130 anzulegen, um den Prozessluftstrom 135 durch die Trommel 110 hindurch zu bewirken.The operating device 150 also has an output device 154. The dispenser 154 is configured to apply a blower signal 164 to the process air blower 130 to cause the process airflow 135 through the drum 110.

Die Betriebsvorrichtung 150 weist zudem eine Bereitstellungseinrichtung 156 auf. Die Bereitstellungseinrichtung 156 ist ausgebildet, um ein Antriebssignal 166 an die Trommel 110 bereitzustellen, um die Trommel 110 zwischen einer Anlegedrehzahl, bei der in der Trommel 110 aufgenommene Wäsche bei einer Drehbewegung der Trommel 110 an der Trommelwand anliegt, und einer Wäschefalldrehzahl anzutreiben, bei der in der Trommel 110 aufgenommene Wäsche bei einer Drehbewegung der Trommel 110 von der Trommelwand fällt.The operating device 150 also has a provision device 156. The delivery device 156 is configured to provide a drive signal 166 to the drum 110 to drive the drum 110 between a apply speed at which laundry received in the drum 110 engages the drum wall upon rotational movement of the drum 110 and a wash stall speed in the drum 110 recorded laundry falls upon a rotational movement of the drum 110 of the drum wall.

Dabei ist die Betriebsvorrichtung 150 ausgebildet, die Schritte eines Verfahrens aus einer der Figuren 4 und 5 oder eines ähnlichen Verfahrens auszuführen.In this case, the operating device 150 is formed, the steps of a method of one of FIGS. 4 and 5 or a similar procedure.

Figur 2 zeigt ein schematisches Trommeldrehzahl-Zeit-Diagramm 200 für eine Wäschebehandlungsmaschine gemäß einem Ausführungsbeispiel der Erfindung. Bei der Wäschebehandlungsmaschine handelt es sich um die Wäschebehandlungsmaschine aus Figur 1 oder eine ähnliche Wäschebehandlungsmaschine. Dabei ist an einer Abszissenachse des Diagramms 200 die Zeit t aufgetragen, wobei an der Ordinatenachse des Diagramms 200 die Trommeldrehzahl n aufgetragen ist. Die Trommeldrehzahl n repräsentiert eine Drehzahl der Trommel der Wäschebehandlungsmaschine. FIG. 2 shows a schematic drum speed-time diagram 200 for a laundry treating machine according to an embodiment of the invention. The laundry treatment machine is the laundry treatment machine FIG. 1 or a similar laundry treatment machine. In this case, the time t is plotted on an abscissa axis of the diagram 200, wherein on the ordinate axis of the diagram 200, the drum speed n is plotted. The drum speed n represents a rotational speed of the drum of the laundry treating machine.

In dem Diagramm 200 ist ein Graph 210 eingezeichnet, der einen Verlauf der Trommeldrehzahl n über der Zeit t repräsentiert. Der Graph 210 verläuft beispielhaft einem Rechtecksignal ähnlich. Der Graph 210 schaltet hierbei beispielsweise periodisch zwischen einer Anlegedrehzahl 202, die ein oberes Drehzahlniveau repräsentiert, und einer Wäschefalldrehzahl 204, die ein unteres Drehzahlniveau repräsentiert, hin und her.In the diagram 200, a graph 210 is plotted, which represents a course of the drum speed n over the time t. The graph 210 is exemplary similar to a square wave signal. For example, the graph 210 periodically switches between an apply speed 202 representing an upper speed level and a wash speed 204 representing a lower speed level.

Figur 3 zeigt ein schematisches Temperatur-Zeit-Diagramm 300 für eine Wäschebehandlungsmaschine gemäß einem Ausführungsbeispiel der Erfindung. Bei der Wäschebehandlungsmaschine handelt es sich um die Wäschebehandlungsmaschine aus Figur 1 oder eine ähnliche Wäschebehandlungsmaschine. Dabei ist an einer Abszissenachse des Diagramms 300 die Zeit t aufgetragen, wobei an der Ordinatenachse des Diagramms 300 Temperaturen ϑ aufgetragen sind. FIG. 3 shows a schematic temperature-time diagram 300 for a laundry treating machine according to an embodiment of the invention. The laundry treatment machine is the laundry treatment machine FIG. 1 or a similar laundry treatment machine. In this case, the time t is plotted on an abscissa axis of the diagram 300, wherein temperatures θ are plotted on the ordinate axis of the diagram 300.

In dem Diagramm 300 ist ein erster Graph 310 eingezeichnet, der einen Verlauf einer Trommelwandtemperatur bzw. Trommelmanteltemperatur der Trommel der Wäschebehandlungsmaschine repräsentiert. Ferner ist in dem Diagramm 300 auch ein zweiter Graph 320 eingezeichnet, der einen Verlauf einer Prozesslufttemperatur eines Volumenstroms von Prozessluft in der Wäschebehandlungsmaschine repräsentiert.Plotted in the diagram 300 is a first graph 310 which represents a profile of a drum wall temperature or drum jacket temperature of the drum of the laundry treatment machine. Furthermore, in the diagram 300, a second graph 320 is also shown, which represents a profile of a process air temperature of a volume flow of process air in the laundry treatment machine.

Zudem sind in dem Diagramm 300 ein erster Zeitpunkt t1 und ein zweiter Zeitpunkt t2 angetragen. Eine erste Zeitdauer vor dem ersten Zeitpunkt t1 repräsentiert eine Aufheizphase, wobei eine zweite Zeitdauer zwischen dem ersten Zeitpunkt t1 und dem zweiten Zeitpunkt t2 eine Phase einer Regelung nach der Trommelmanteltemperatur repräsentiert, wobei eine dritte Zeitdauer nach dem zweiten Zeitpunkt t2 eine Phase einer Regelung nach der Prozesslufttemperatur repräsentiert.In addition, in the diagram 300, a first time t1 and a second time t2 are plotted. A first time period before the first time t1 represents a heating-up phase, wherein a second time duration between the first time t1 and the second time t2 represents a phase of control after the drum jacket temperature, a third time period after the second time t2 represents a phase of control after the drum time Process air temperature represents.

Auch ist in dem Diagramm 300 eine Behandlungszeitdauer 330 bzw. eine Temperaturhaltezeit 330 insbesondere zur Fixierung einer Imprägnierung eingezeichnet. Die Behandlungszeitdauer 330 ist nach dem zweiten Zeitpunkt t2 bzw. in der Phase der Regelung nach der Prozesslufttemperatur angeordnet.Also shown in the diagram 300 is a treatment time period 330 or a temperature hold time 330, in particular for fixing an impregnation. The treatment period 330 is arranged after the second time t2 or in the phase of the control after the process air temperature.

Der erste Graph 310 steigt während der Aufheizphase auf eine vordefinierte Maximaltemperatur an, die zwischen dem ersten Zeitpunkt t1 und dem zweiten Zeitpunkt t2 eine Solltemperatur zum induktiven Erwärmen der Trommel repräsentiert. Nach dem zweiten Zeitpunkt t2 fällt der erste Graph 310 beispielhaft ab.The first graph 310 rises during the heating phase to a predefined maximum temperature, which represents a target temperature for inductive heating of the drum between the first time t1 and the second time t2. After the second time t2, the first graph 310 drops off by way of example.

Der zweite Graph 320 steigt bis zu dem zweiten Zeitpunkt t2 auf eine Solltemperatur für die Prozessluft an, die während der Behandlungszeitdauer 330 beibehalten wird.The second graph 320 rises to a target temperature for the process air maintained during the treatment period 330 until the second time t2.

Figur 4 zeigt ein Ablaufdiagramm eines Verfahrens 400 zum Behandeln von Wäsche gemäß einem Ausführungsbeispiel der Erfindung. Das Verfahren 400 ist dabei in Verbindung mit der Wäschebehandlungsmaschine aus Figur 1 oder einer ähnlichen Wäschebehandlungsmaschine ausführbar. Auch ist das Verfahren 400 hierbei insbesondere unter Verwendung der Trommel, der zumindest einen elektrischen Spule, des Prozessluftgebläses und der Betriebsvorrichtung ausführbar. FIG. 4 FIG. 12 shows a flowchart of a method 400 for treating laundry according to an embodiment of the invention. The method 400 is in this case in connection with the laundry treatment machine FIG. 1 or a similar laundry treatment machine executable. In this case too, the method 400 can be executed in particular using the drum, the at least one electrical coil, the process air blower and the operating device.

Das Verfahren 400 zum Behandeln weist einen Schritt 410 des Induzierens von Wirbelströmen in zumindest einer ferromagnetischen Trommelwand einer Trommel zum Aufnehmen der Wäsche auf, um die Trommel zu erwärmen. Auch weist das Verfahren 400 zum Behandeln einen Schritt 420 des Bewirkens eines Volumenstroms von Prozessluft durch die Trommel hindurch auf. Das Verfahren 400 zum Behandeln weist ferner einen Schritt 430 des Antreibens der Trommel zwischen einer Anlegedrehzahl, bei der in der Trommel aufgenommene Wäsche bei einer Drehbewegung der Trommel vorzugsweise durchgängig an der Trommelwand anliegt, und einer Wäschefalldrehzahl auf, bei der sich in der Trommel aufgenommene Wäsche bei einer Drehbewegung der Trommel von der Trommelwand löst und nach unten fällt.The method 400 for treating includes a step 410 of inducing eddy currents in at least one ferromagnetic drum wall of a drum to receive the laundry to heat the drum. Also, the method 400 for treating includes a step 420 of causing a volume flow of process air through the drum. The method 400 for treating further comprises a step 430 of driving the drum between an application speed at which the laundry accommodated in the drum preferably rests continuously against the drum wall during a rotational movement of the drum, and a laundry speed at which laundry received in the drum at a rotational movement of the drum releases from the drum wall and falls down.

Der Schritt 430 des Antreibens kann hierbei kontinuierlich durchgeführt werden. Auch können der Schritt 410 des Induzierens und der Schritt 420 des Bewirkens kontinuierlich durchgeführt werden. Dabei können der Schritt 410 des Induzierens, der Schritt 420 des Bewirkens und der Schritt 430 des Antreibens zumindest zeitweise parallel ausgeführt werden.The step 430 of driving can be carried out continuously. Also, the step 410 of inducing and the step 420 of causing can be performed continuously. At this time, the step 410 of inducing, the step 420 of causing and the step 430 of driving may be performed at least temporarily in parallel.

Gemäß einem Ausführungsbeispiel des Verfahrens 400 zum Behandeln wird im Schritt 430 des Antreibens alternierend zwischen der Anlegedrehzahl und der Wäschefalldrehzahl gewechselt. Beispielhaft wird dabei im Schritt 430 des Antreibens ein Verhältnis einer Zeitdauer eines Antreibens der Trommel mit der Anlegedrehzahl zu einer Zeitdauer eines Antreibens der Trommel mit der Wäschefalldrehzahl zumindest in Abhängigkeit von einer Wäscheart und/oder einer Beladungsmenge der Wäsche in der Trommel eingestellt und/oder variiert. Zusätzlich oder alternativ wird hierbei im Schritt 430 des Antreibens die Zeitdauer der Anlegedrehzahl erhöht, je empfindlicher die Wäscheart ist, und/oder die Zeitdauer der Wäschefalldrehzahl erhöht, je höher die Beladungsmenge von Wäsche in der Trommel ist und/oder je größer Wäschestücke der Wäsche sind. Ferner wird beispielsweise im Schritt 430 des Antreibens die Trommel in eine einzige Drehrichtung angetrieben oder in wechselnde Drehrichtungen angetrieben.According to an embodiment of the method 400 for the treatment, in step 430 of the driving alternately between the application speed and the laundry speed is changed. By way of example, in step 430 of driving, a ratio of a period of driving the drum to the application speed at a time of driving the drum at the laundry speed is set and / or varied at least depending on a type of laundry and / or a load of the laundry in the drum , Additionally or alternatively, in this case in step 430 of the drive, the duration of the application speed increases, the more sensitive the type of laundry, and / or increases the length of the laundry cycle speed, the higher the load of laundry in the drum and / or the larger laundry items of the laundry , Further, for example, in step 430 of driving, the drum is driven in a single direction of rotation or driven in alternate directions of rotation.

Gemäß einem Ausführungsbeispiel des Verfahrens 400 zum Behandeln wird im Schritt 420 des Induzierens die Trommel auf eine vordefinierte Maximaltemperatur erwärmt, bis eine Temperatur der aus der Trommel austretenden Prozessluft eine Solltemperatur erreicht. Ferner werden beispielsweise der Schritt 410 des Induzierens, der Schritt 420 des Bewirkens und der Schritt 430 des Antreibens zumindest eine Behandlungszeitdauer lang ausgeführt, wenn eine Temperatur der aus der Trommel austretenden Prozessluft eine Solltemperatur erreicht hat. Dabei wird die Temperatur der Prozessluft während der Behandlungszeitdauer auf der Solltemperatur gehalten. Optional beginnt die Behandlungszeitdauer zusätzlich dann, wenn eine Restfeuchte der Wäsche einen vordefinierbaren Wert erreicht hat. Insbesondere wird dabei im Schritt 410 des Induzierens die Trommel erwärmt, um eine zum Auffrischen einer Imprägnierung der Wäsche geeignete Auffrischtemperatur der aus der Trommel austretenden Prozessluft zu erreichen.In one embodiment of method 400 for processing, in step 420 of inducing, the drum is heated to a predefined maximum temperature until a temperature of the process air exiting the drum reaches a set temperature. Further, for example, the step 410 of inducing, the step 420 of causing and the step 430 of driving is performed for at least one treatment period when a temperature of the process air exiting the drum has reached a target temperature. The temperature of the process air is maintained at the desired temperature during the treatment period. Optionally, the treatment period additionally begins when a residual moisture content of the laundry has reached a predefinable value. More specifically, in step 410 of inducing, the drum is heated to achieve a refreshing temperature of the process air exiting the drum for refreshing an impregnation of the laundry.

Figur 5 zeigt ein Ablaufdiagramm eines Verfahrens 500 zum Betreiben gemäß einem Ausführungsbeispiel der Erfindung. Das Verfahren 500 ist ausführbar, um eine Wäschebehandlungsmaschine zu betreiben. Bei der Wäschebehandlungsmaschine handelt es sich um die Wäschebehandlungsmaschine aus Figur 1 oder eine ähnliche Wäschebehandlungsmaschine mit einer Trommel zum Aufnehmen von Wäsche, wobei die Trommel zumindest eine Trommelwand aus einem ferromagnetischen Material aufweist, zumindest einer benachbart zu der Trommel angeordneten elektrischen Spule und einem Prozessluftgebläse. Dabei ist das Verfahren 500 in Verbindung mit bzw. unter Verwendung von der Betriebsvorrichtung aus Figur 1 oder einer ähnlichen Betriebsvorrichtung ausführbar. 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 executable to operate a laundry treating machine. The laundry treatment machine is the laundry treatment machine FIG. 1 or a similar laundry treating machine having a drum for receiving laundry, the drum having at least one ferromagnetic wall drum wall, at least one electrical coil located adjacent to the drum, and a process air blower. Here, the method 500 is in conjunction with or using the operating device FIG. 1 or a similar operating device executable.

Das Verfahren 500 zum Betreiben weist einen Schritt 510 des Anlegens eines elektrischen Signals an die zumindest eine elektrische Spule auf, um Wirbelströme in der zumindest einen Trommelwand zu induzieren, um die Trommel zu erwärmen. Auch weist das Verfahren 500 zum Betreiben einen Schritt 520 des Ausgebens eines Gebläsesignals an das Prozessluftgebläse auf, um einen Volumenstrom von Prozessluft durch die Trommel hindurch zu bewirken. Zudem weist das Verfahren 500 zum Betreiben einen Schritt 530 des Bereitstellens eines Antriebssignals an die Trommel auf, um die Trommel zwischen einer Anlegedrehzahl, bei der in der Trommel aufgenommene Wäsche bei einer Drehbewegung der Trommel an der Trommelwand anliegt, und einer Wäschefalldrehzahl anzutreiben, bei der in der Trommel aufgenommene Wäsche bei einer Drehbewegung der Trommel von der Trommelwand fällt.The method 500 for operating includes a step 510 of 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. Also, the method 500 includes operating step 520 of outputting a blower signal to the process air blower to effect a flow of process air through the drum. In addition, the method 500 of operation includes a step 530 of providing a drive signal to the drum to drive the drum between an apply speed at which laundry received in the drum contacts the drum wall upon rotation of the drum and a tumble speed at which in the drum recorded laundry falls upon a rotational movement of the drum of the drum wall.

Dabei können der Schritt 510 des Anlegens, der Schritt 520 des Ausgebens und/oder der Schritt 530 des Bereitstellens parallel und/oder kontinuierlich ausgeführt werden.In this case, the step 510 of the application, the step 520 of the output and / or the step 530 of the provision can be carried out in parallel and / or continuously.

Unter beispielhafter Bezugnahme auf die Figuren 1 bis 5 werden nachfolgend Ausführungsbeispiele der Erfindung kurz vorgestellt und/oder nochmals zusammenfassend mit anderen Worten erläutert.By way of example with reference to FIGS FIGS. 1 to 5 Embodiments of the invention are briefly presented below and / or explained in summary again in other words.

Beispielsweise wird eine zu reaktivierende, imprägnierte Wäsche trocken in die als Wäschetrockner ausgeführt Wäschebehandlungsmaschine 100 gegeben. Die Trommel 110 bzw. Wäschetrommel 110 dreht mit einer Drehzahl n, bei welcher die Wäsche anliegt, d.h. mit der Anlegedrehzahl 202, die beispielhaft mindestens 60 min-1 beträgt. Mittels Induktionsheizung wird auf eine Prozesslufttemperatur nach der Trommel 110 von 60 Grad Celsius erwärmt. Diese Solltemperatur wird während der Behandlungszeitdauer 330 beibehalten, beispielsweise 20 Minuten. Dabei kann ein gegebenenfalls in der Wäschebehandlungsmaschine 100 angeordnetes Wärmepumpensystem ausgeschaltet bleiben, da bei einer Reaktivierung einer Imprägnierung keine Trocknung der Wäsche erforderlich ist. Falls vorher eine Nachimprägnierung der Wäschebehandlungsmaschine 100 erfolgt ist, kann eine Wärmepumpe hinzugeschaltet werden, um die Wäsche vor der Fixierung bzw. Reaktivierung zu trocknen.For example, an impregnated laundry to be reactivated is placed dry in the laundry treating machine 100 configured as a tumble dryer. The drum 110 or washing drum 110 rotates at a speed n at which the laundry is applied, ie with the application speed 202, which is for example at least 60 min -1 . By induction heating is heated to a process air temperature after the drum 110 of 60 degrees Celsius. This setpoint temperature is maintained during the treatment period 330, for example 20 minutes. In this case, an optionally arranged in the laundry treatment machine 100 heat pump system remain switched off, since no reactivation of an impregnation drying of the laundry is required. If a post-impregnation of the laundry treatment machine 100 has previously taken place, a heat pump can be added in order to dry the laundry before the fixation or reactivation.

Gemäß einem Ausführungsbeispiel ist das Prozessluftgebläse 130 zumindest während der Behandlungszeitdauer 330 durchgehend aktiviert. Ein Reversieren der Trommel 110 ist optional. Ein so genannter Wäschering wird durch Drehzahländerung aufgelöst, um die Wäschestücke umzuschichten, indem beispielsweise zyklisch zwischen Anlegedrehzahl 202 und Wäschefalldrehzahl 204 gewechselt wird, um hohe Wäschetemperaturen, die beispielsweise in etwa der Prozesslufttemperatur nach der Trommel 110 entsprechen können, und eine gleichmäßige Trocknung zu erreichen. Die Anlegedrehzahl 202 kann beispielsweise eine Trommeldrehzahl von 60 bis 80 min-1 repräsentieren.According to one embodiment, the process air blower 130 is continuously activated at least during the treatment period 330. Reversing the drum 110 is optional. A so-called wash ring is dissolved by speed change to rearrange the laundry by, for example, cyclically switching between apply speed 202 and wash speed 204 to achieve high wash temperatures that may, for example, approximately equal the process air temperature to drum 110 and uniform drying. The settling speed 202 may represent, for example, a drum speed of 60 to 80 min -1.

Die Temperatur der zumindest einen Trommelwand der Trommel 110 bzw. eine Trommelmanteltemperatur kann auf eine maximale Temperatur begrenzt werden, beispielsweise auf 100 Grad Celsius. Während der Aufheizphase wird die Trommelmanteltemperatur im Schritt 410 des Induzierens bzw. im Schritt 510 des Anlegens beispielsweise konstant geregelt. Bei Erreichen der maximalen Prozesslufttemperatur wird nach dieser geregelt und die Trommelmanteltemperatur nimmt beispielsweise ab.The temperature of the at least one drum wall of the drum 110 or a drum jacket temperature can be limited to a maximum temperature, for example to 100 degrees Celsius. During the heating phase, for example, the drum shell temperature is constantly controlled in step 410 of inducing and in step 510 of applying, respectively. Upon reaching the maximum process air temperature is controlled according to this and the drum shell temperature decreases, for example.

Gemäß einem Ausführungsbeispiel der Erfindung kann das Behandeln der Wäsche ein Imprägnieren/Reaktivieren ohne Einsatz einer Wärmepumpe aufweisen, wobei ein schnelles Aufheizen bei maximaler Trommelmanteltemperatur auf beispielsweise 60 Grad Celsius Prozesslufttemperatur und anschließend beispielsweise 20 Minuten Zeittrocknen mit Regelung nach der Prozesslufttemperatur zum Einsatz kommen können. Gemäß einem anderen Ausführungsbeispiel erfolgt zunächst ein Trocknen vorbehandelter Wäsche und danach ein Imprägnieren/Reaktivieren, wobei das zum vorstehend genannten Ausführungsbeispiel Gesagte gilt, wobei das Zeittrocknen beispielsweise aber erst bei Erreichen der definierten Prozesslufttemperatur und einer vorgegebenen Restfeuchte, beispielsweise 0 Prozent Restfeuchte oder dergleichen, beginnt. Die vorgegebene Restfeuchte kann variabel einstellbar sein.According to one exemplary embodiment of the invention, the treatment of the laundry may include impregnation / reactivation without the use of a heat pump, with rapid heating at maximum drum jacket temperature to, for example, 60 ° C. process air temperature and then, for example, 20 minutes time drying controlled by the process air temperature. According to another embodiment, a drying of pretreated laundry and then an impregnation / reactivation, which applies to the aforementioned embodiment applies, wherein the time drying, for example, but only when reaching the defined process air temperature and a predetermined residual moisture, for example, 0 percent residual moisture or the like begins , The predetermined residual moisture can be variably adjusted.

Somit kann, um ggf. auch ohne Reversieren die Wäsche zuverlässig durchmischen zu können, die Trommeldrehzahl n zwischen der Anlegedrehzahl 202 und der Wäschefalldrehzahl 204 gewechselt werden. Dabei kann das zeitliche Verhältnis zwischen Anlegedrehzahl 202 und Wäschefalldrehzahl 204 bzw. eine Taktfrequenz in Abhängigkeit von Wäscheart und Beladungsmenge von Wäsche in der Trommel 110 variiert oder eingestellt werden. Je empfindlicher die Wäsche, desto höher kann ein Anteil der Anlegedrehzahl 202 gewählt werden, um die Wäsche weniger mechanisch zu belasten und somit zu schonen. Je größer Wäschestücke sind, desto höher kann ein Anteil der Wäschefalldrehzahl 204 gewählt werden, um die Wäsche gleichmäßig zu trocknen. Je höher die Beladungsmenge von Wäsche in der Trommel 110, desto länger braucht die Wäsche zum Durchmischen und kann somit ein desto größerer Anteil der Wäschefalldrehzahl 204 gewählt werden.Thus, in order, if necessary, to be able to mix the laundry reliably without reversing, the drum speed n between the application speed 202 and the laundry speed 204 can be changed. In this case, the time relationship between the application speed 202 and the laundry speed 204 or a clock frequency depending on the type of laundry and load amount of laundry in the drum 110 can be varied or adjusted. The more sensitive the laundry, the higher a proportion of the application speed 202 can be selected in order to load the laundry less mechanically and thus to protect it. The larger the items of laundry, the higher a proportion of the laundry speed 204 can be selected in order to dry the laundry evenly. The higher the load of laundry in the drum 110, the longer the laundry needs to mix and thus the greater the proportion of the wash stall speed 204 can be selected.

Claims (12)

  1. Method (400) for treating laundry in a laundry treatment appliance (100) comprising a drum (110) for receiving the laundry, wherein the drum (110) has at least one drum wall made of a ferromagnetic material, and comprising at least one electrical coil (120), arranged so as to be adjacent to the drum (110), and comprising a process air fan (130), wherein the method (400) comprises at least the following steps:
    inducing (410) eddy currents in the at least one drum wall of the drum (110) in order to heat the drum (110) by applying (510) an electrical signal (162) to the at least one electrical coil (120);
    effecting (420) a volume flow of process air (135) through the drum (110) by outputting (520) a fan signal (164) to the process air fan (130); and
    driving (430) the drum (110) between a speed (202) at which laundry received in the drum (110) rests against the drum wall upon rotational movement of the drum (110) and a laundry-drop speed (204) at which the laundry received in the drum (110) drops from the drum wall upon rotational movement of the drum (110), by providing (530) a drive signal (166) to the drum (110), wherein, in the driving step (430), switching takes place in an alternating manner between the speed (202) at which the laundry rests against the drum wall and the laundry-drop speed (204), and wherein a ratio of a duration of driving the drum (110) at the speed (202) at which the laundry rests against the drum wall to a duration of driving the drum (110) at the laundry-drop speed (204) is adjusted and/or varied at least depending on a laundry type and/or a load amount of the laundry in the drum (110).
  2. Method (400) according to claim 1, wherein, in the driving step (430), the duration of the speed (202) at which the laundry rests against the drum wall is increased the more sensitive the type of laundry is.
  3. Method (400) according to either claim 1 or claim 2, wherein, in the driving step (430), the duration of the laundry drop speed (204) is increased the higher the load amount of laundry in the drum (110) and/or the larger the items of laundry are.
  4. Method (400) according to any of the preceding claims, wherein, in the driving step (430), the drum (110) is driven in a single rotational direction (140).
  5. Method (400) according to any of the preceding claims 1 to 3, wherein, in the driving step (430), the drum (110) is driven in alternating rotational directions (140).
  6. Method (400) according to any of the preceding claims, wherein, in the inducing step (410), the drum (110) is heated to a predefined maximum temperature until a temperature (320) of the process air (135) exiting the drum (110) reaches a target temperature.
  7. Method (400) according to any of the preceding claims, wherein the inducing step (410), the effecting step (420) and the driving step (430) are carried out for a treatment period (330) when a temperature (320) of the process air (135) exiting the drum (110) has reached a target temperature, the temperature (320) of the process air (135) being maintained at the target temperature during the treatment period (330).
  8. Method (400) according to any of the preceding claims, wherein the inducing step (410), the effecting step (420) and the driving step (430) are carried out for a treatment period (330) when residual moisture in the laundry has reached a predefinable value and a temperature (320) of the process air (135) exiting the drum (110) has reached a target temperature, the temperature (320) of the process air (135) being maintained at the target temperature during the treatment period (330).
  9. Method (400) according to any of the preceding claims, wherein, in the inducing step (410), the drum (110) is heated in order to reach a refresh temperature of the process air (135) exiting the drum (110), which refresh temperature is suitable for refreshing an impregnation of the laundry.
  10. Device (150) which is designed to carry out the steps of the method (500) according to claim 1.
  11. Laundry treatment appliance (100) for treating laundry, wherein the laundry treatment appliance (100) comprises at least the following features:
    a drum (110) for receiving the laundry, wherein the drum (110) has at least one drum wall made of a ferromagnetic material;
    at least one electrical coil (120), arranged so as to be adjacent to the drum (110), for inducing eddy currents in the at least one drum wall in order to heat the drum (110);
    a process air fan (130) for effecting a volume flow of process air through the drum (110); and
    a device (150) according to claim 10, wherein the device (150) is designed to control at least the drum (110), the at least one electrical coil (120), and the process air fan (130).
  12. Computer-program product having program code for performing a method (500) according to claim 1, when the computer-program product is executed on a device (150) according to claim 10.
EP17180550.0A 2016-07-26 2017-07-10 Method for the treatment of laundry in a laundry treating machine and laundry treating machine for the treatment of laundry Active EP3276072B1 (en)

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DE102016113723.5A DE102016113723A1 (en) 2016-07-26 2016-07-26 A method for treating laundry, method and apparatus for operating a laundry treating machine and laundry treating machine for treating laundry

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KR102634129B1 (en) 2018-12-13 2024-02-05 엘지전자 주식회사 laundry machine having an induction heater and the control method of the same
KR102635506B1 (en) 2018-12-13 2024-02-13 엘지전자 주식회사 laundry machine having an induction heater and the control method of the same
KR102661663B1 (en) 2018-12-13 2024-04-29 엘지전자 주식회사 laundry machine having an induction heater and the control method of the same
CN112252000A (en) * 2019-07-05 2021-01-22 青岛海尔洗衣机有限公司 Control method of clothes treatment equipment

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