EP3320138B1 - Laundry care apparatus and laundry care method - Google Patents

Laundry care apparatus and laundry care method Download PDF

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Publication number
EP3320138B1
EP3320138B1 EP16720824.8A EP16720824A EP3320138B1 EP 3320138 B1 EP3320138 B1 EP 3320138B1 EP 16720824 A EP16720824 A EP 16720824A EP 3320138 B1 EP3320138 B1 EP 3320138B1
Authority
EP
European Patent Office
Prior art keywords
laundry
rotational speed
laundry drum
control device
threshold value
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
EP16720824.8A
Other languages
German (de)
French (fr)
Other versions
EP3320138A1 (en
Inventor
Rodrigo FERRAZ MAINA
Cornelia Witt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102015212742.7A external-priority patent/DE102015212742A1/en
Priority claimed from DE102015212741.9A external-priority patent/DE102015212741B4/en
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL16720824T priority Critical patent/PL3320138T3/en
Publication of EP3320138A1 publication Critical patent/EP3320138A1/en
Application granted granted Critical
Publication of EP3320138B1 publication Critical patent/EP3320138B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/18—Washing liquid level
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/52—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to electric heating means, e.g. temperature 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
    • D06F2105/06—Recirculation of washing liquids, e.g. by pumps or diverting valves
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
    • D06F2105/48—Drum speed
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
    • D06F35/005—Methods for washing, rinsing or spin-drying
    • D06F35/006—Methods for washing, rinsing or spin-drying for washing or rinsing only

Definitions

  • the present invention relates to a laundry care device and a laundry care method.
  • a laundry care appliance is in particular a washing machine, but can also be, for example, a machine for rinsing and / or impregnating laundry items. These additional functions can also be integrated in a washing machine.
  • the disclosure EP 2 703 537 A1 shows a washing machine.
  • the disclosure EP 2 161 365 A2 shows a washing machine.
  • the disclosure EP 1 867 773 A1 shows a washing machine.
  • a detergent from a detergent receptacle together with fresh water is washed into the laundry drum of the laundry care device during a washing-in process by means of a washing-in device, in order to wash the laundry items in the laundry drum with the mixture of detergent and fresh water is also referred to herein as alkali or washing liquid.
  • alkali or washing liquid In order to ensure an in-depth and as uniform as possible wetting or moistening of the laundry items with the washing liquid, it is eg from the DE3401899A1 known to discharge washing liquid from the laundry drum or a tub connected to the laundry drum by means of a pumping device and to apply it again to the laundry items in the laundry drum via a nozzle.
  • a heating element is also described, which is arranged on the bottom of the tub and with which the washing liquid can be heated to a target temperature.
  • the disclosure DE 10 2013 106 091 A1 shows a washing method and a washing machine.
  • the disclosure EP 2 246 469 A1 shows a washing machine.
  • the disclosure EP 0 464 776 A1 shows a protective mechanism for a heating element of a washing machine.
  • the object is achieved by a laundry care device with a rotatably mounted laundry drum for receiving items of laundry, a drive motor for rotating the laundry drum, a pumping device for recirculating washing liquid out of the laundry drum and back into the laundry drum, and a heating element for Heating the washing liquid and a control device for controlling the drive motor, the pumping device and the heating element in accordance with a laundry care program running on the control device during operation.
  • the control device is designed to deactivate the pumping device when the heating element is activated as soon as the amount of washing liquid in the washing drum or in a tub in which the washing drum is rotatably mounted falls below a minimum amount threshold.
  • control device is designed, as part of the laundry care program, which provides phases in which the laundry drum is rotated at a speed in the range of the application speeds and the Pumping device is active to activate the pumping device only when the speed of the laundry drum is ramped up when the speed of the laundry drum exceeds a first speed threshold value.
  • control device is designed to deactivate the pump-around device when the speed of the laundry drum is reduced when the speed of the laundry drum falls below a second speed threshold value.
  • the first speed threshold can be equal to the second speed threshold. Studies have shown that the first and / or the second speed threshold value should preferably be greater than approximately 50 rpm.
  • An application speed can be, for example, in a range from approximately 80 to approximately 500 rpm.
  • control device is designed to continuously adapt the first and / or the second speed threshold value to the amount of washing liquid in the washing drum, the first and / or the speed threshold value being lowered for a larger amount of washing liquid and for a smaller amount the washing liquid the first and / or the second speed threshold value is increased.
  • the laundry care device further comprises a pressure sensor, which is designed to detect the pressure of the washing liquid in the laundry drum or the tub in which the laundry drum is rotatably mounted, the control device being designed to, when the heating element is activated, the pumping device deactivate as soon as the pressure detected by the pressure sensor falls below a pressure threshold.
  • control device is designed to cycle at least two cycles in which the rotation of the laundry drum is raised to a placement speed and lowered again, the pumping device is activated above the first speed threshold value and deactivated below the second speed threshold value, and the heating element is activated Times in a row.
  • control device is designed to activate the cycle in which the rotation of the laundry drum is raised to a placement speed and then lowered again, the pumping device is activated above the first speed threshold value and deactivated below the second speed threshold value, and the heating element is activated as long as repeat until a substantially uniform temperature distribution is achieved at a desired target temperature.
  • control device is designed to deactivate the heating element and at least once more to rotate the laundry drum up to a contact speed and again drive down, the pumping device being activated above the first speed threshold and the pumping device being deactivated below the second speed threshold.
  • control device is designed to operate the pumping device continuously when the heating element is activated. This means that the pumping device is operated continuously until the amount of washing liquid in the laundry drum falls below the minimum amount threshold. This results in efficient pumping, for example.
  • Continuously means the opposite of impulsive. This means that the pumping device remains activated until the amount of washing liquid in the laundry drum falls below the minimum amount threshold.
  • the object is achieved by a laundry care method for a laundry care device with a rotatably mounted laundry drum for receiving items of laundry, a drive motor for rotating the laundry drum, a pumping device for recirculating washing liquid out of the laundry drum and back into the laundry drum, a heating element for heating the washing liquid and a control device for controlling the drive motor, the pumping device and the heating element according to a laundry care program running on the control device during operation.
  • the laundry care method comprises the step that the control device deactivates the pump-around device when the heating element is activated as soon as the amount of washing liquid in the laundry drum or a tub in which the laundry drum is rotatably mounted falls below a minimum amount threshold.
  • control device activates as part of the laundry care program, which provides phases in which the laundry drum with a Rotation speed in the range of application speeds is rotated and the pumping device is active, the pumping device when the speed of the laundry drum is ramped up only when the speed of the laundry drum exceeds a first speed threshold value.
  • control device deactivates the pump-around device when the speed of the laundry drum is reduced when the speed of the laundry drum falls below a second speed threshold.
  • the first speed threshold can be equal to the second speed threshold. Studies have shown that the first and / or the second speed threshold value should preferably be greater than approximately 50 rpm.
  • An application speed can be, for example, in a range from approximately 80 to approximately 500 rpm.
  • control device continuously adjusts the first and / or the second speed threshold value to the amount of washing liquid in the washing drum or the tub, the first and / or the speed threshold value being lowered for a larger amount of washing liquid and for a smaller one Amount of washing liquid the first and / or the second speed threshold value is increased.
  • the laundry care method further comprises the step of detecting the pressure of the washing liquid in the laundry drum or the tub in which the laundry drum is rotatably mounted, the control device deactivating the pumping device when the heating element is activated as soon as the detected pressure falls below a pressure threshold falls.
  • control device carries out a cycle in which the rotation of the laundry drum is raised to a placement speed and lowered again, the pumping device is activated above the first speed threshold value and deactivated below the second speed threshold value, and the heating element is activated, at least twice in succession ,
  • control device repeats the cycle in which the rotation of the laundry drum is ramped up to a feed speed and is lowered again, the pumping device is activated above the first speed threshold value and deactivated below the second speed threshold value, and the heating element is activated until an im Substantially uniform temperature distribution is achieved at a desired target temperature.
  • control device deactivates the heating element as soon as an essentially uniform temperature distribution is achieved at the desired target temperature, and the rotation of the laundry drum is at least once again increased and decreased to a contact speed, the pumping device being activated above the first speed threshold value and the pumping device is deactivated below the second speed threshold.
  • control device operates the pumping device continuously when the heating element is activated. This means that the pumping device is operated continuously until the amount of washing liquid in the laundry drum falls below the minimum amount threshold. This results in efficient pumping, for example.
  • Continuously means the opposite of impulsive. This means that the pumping device remains activated until the amount of washing liquid in the laundry drum falls below the minimum amount threshold.
  • the laundry care method is carried out or carried out by means of the laundry care device.
  • the laundry care device is designed or set up to carry out or carry out the laundry care process.
  • FIG 1 shows a schematic representation of a washing machine representative of a general laundry care device 100.
  • the laundry care device 100 in the form of a washing machine is used to wash items of laundry and similar laundry items with a detergent.
  • the washing machine can optionally also be configured as a washer dryer in order to wash and dry laundry or similar laundry items.
  • the term “detergent” also includes treatment additives such as fabric softener, rinse aid or odor-improving agent in various forms (liquid, gel-like, pasty or also powder-like).
  • the washing machine 100 from Figure 1 contains in a machine housing 102 a tub 104 fixed in the machine housing.
  • a laundry drum 106 is rotatably mounted in the tub 104 about a horizontal axis of rotation and can be set in rotation at different speeds by means of a drive motor 105 which can be controlled by an electronic control device 118.
  • a drive motor 105 which can be controlled by an electronic control device 118.
  • items of laundry 108 are indicated, which are lifted when the laundry drum 106 is rotated by carriers 110 on the inside of the laundry drum 106 and fall down again.
  • the laundry items 108 are constantly rearranged when the laundry drum 106 rotates.
  • Fresh water can be fed from a fresh water line 112 through a detergent container 116, for example in the form of an inlet valve, through a detergent dispenser 116, which can be designed, for example, as a induction bowl and in addition to conventional ones
  • Detergents can also contain treatment additives such as fabric softener, rinse aid, odor improver or other laundry treatment agent in various forms (liquid, gel-like, pasty or also powder-like), either directly (as in the Figure 1 schematically shown) or be introduced into the laundry drum 106 via the tub 104.
  • the mixture of fresh water and detergent is referred to herein as washing liquid or lye.
  • the induction device 114 is also connected to the electronic control device 118.
  • the tub 104 is provided at its lower end with a downwardly shaped trough 128 which forms a heating chamber 130.
  • An electrical heating element 132 is arranged in the heating chamber 130, preferably a tubular heating element with which the washing liquid in the tub 104 can be heated. To control the electrical heating element 132, this is also connected to the electronic control device 118, as shown in FIG Figure 1 is shown schematically.
  • a tub drain 134 is provided, which is connected on the one hand to a pumping device 120 and on the other hand to a pumping device 144.
  • the pumping device 120 which serves in particular to flood the laundry items 108 several times with the washing liquid, comprises a pump 122, a suction line 124 on the suction side and a pressure line 126 on the pressure side of the pump 122 the lower end of the tub 104 can be recirculated back into the laundry drum 106 onto the laundry items 108.
  • the washing liquid supplied via the pressure line 126 to the pumping device 120 is applied to the laundry items 108 in the laundry drum 106 via a nozzle.
  • the electronic control device 118 As shown in FIG Figure 1 is shown schematically.
  • the pumping device 144 which is used in particular to pump out washing liquid located in the tub 104 and to discharge it from the washing machine 100, comprises a pump 142 with a suction line 140 and a pressure line 146 Activation of the pumping device 144, in particular the pump 142, can also be connected to the electronic control device 118.
  • Figure 2 shows a schematic diagram that illustrates the time course of several variables in a laundry care method according to the invention, namely the time course of the activity of the pump 122 of the pumping device 120 (ie pump 122 on or off), the speed of the laundry drum 106 and the temperature of the washing liquid.
  • control device 118 is designed to deactivate the pumping device 120 as part of the laundry care program when the heating element 132 is activated as soon as the amount of washing liquid in the laundry drum 106 or the tub 104 falls below a minimum amount threshold.
  • This has the advantage, for example, that an additional protective mechanism is provided which protects the heating element 132 against overheating.
  • control device 118 is designed, in the context of the laundry care program, which provides phases in which the laundry drum 106 is rotated at a speed in the range of the application speeds and the pumping device 120 is to be activated, the pumping device 120 when the speed of the Only activate the laundry drum 106 when the speed of the laundry drum 106 exceeds a first speed threshold.
  • FIG 2 Two such phases are shown in which the laundry drum 106 is rotated at a speed in the range of the application speeds and the pumping device 120 is active.
  • a detailed view of section A from Figure 2 is in Figure 3 shown.
  • the pumping device 120 is only activated when the rotational speed of the laundry drum 106 is increased when the rotational speed of the Washing drum 106 exceeds a first speed threshold value, the technical advantage is achieved, for example, that it can be ensured without great technical effort that the amount of washing liquid in the suds container 104 is always large enough that the pump 122 of the pumping device 120 can be operated without problems, that is especially no air.
  • At speeds of the laundry drum 106 below the first speed threshold value it can happen that the majority of the washing liquid is bound in the items of laundry.
  • control device 118 is designed to deactivate the pumping device 120 when the speed of the laundry drum 106 is reduced when the speed of the laundry drum 106 falls below a second speed threshold value.
  • the first speed threshold can be equal to the second speed threshold. Studies have shown that the first and / or the second speed threshold value should preferably be greater than approximately 50 rpm.
  • An application speed can be, for example, in a range from approximately 80 to approximately 500 rpm.
  • control device 118 is designed to continuously adapt the first and / or the second speed threshold value to the amount of the washing liquid in the washing drum 106 and / or the tub 104, the first and / or the for a larger amount of the washing liquid Speed threshold is lowered and the first and / or the second speed threshold is increased for a smaller amount of washing liquid.
  • the technical advantage is achieved that the laundry care program can be better adapted to a particular wash cycle, which is essentially defined by the type and amount of the laundry items 108.
  • the laundry care device 100 further comprises a pressure sensor, which is designed to detect the pressure of the washing liquid in the laundry drum 106 or in the tub 104, the control device 118 being designed to deactivate the pumping device 120 when the heating element 132 is activated , as soon as the pressure detected by the pressure sensor falls below a pressure threshold.
  • a pressure sensor which is designed to detect the pressure of the washing liquid in the laundry drum 106 or in the tub 104
  • the control device 118 being designed to deactivate the pumping device 120 when the heating element 132 is activated , as soon as the pressure detected by the pressure sensor falls below a pressure threshold.
  • control device 118 is designed to perform a cycle in which the rotation of the laundry drum 106 is ramped up and down again to a contact speed, the pumping device 120 is activated above the first speed threshold value and deactivated below the second speed threshold value, and the heating element 132 is activated is to perform at least twice in a row. This has the advantage, for example, that a more uniform temperature distribution is generated in the washing liquid and the laundry items 108.
  • control device 118 is designed to activate the pumping device 120 above the first speed threshold value and below the second speed threshold value, and activate the heating element 132, and the heating element 132 is activated, the cycle in which the rotation of the laundry drum 106 is raised to a feed speed and lowered again is to be repeated until an essentially uniform temperature distribution is achieved at a desired target temperature.
  • control device 118 is designed to deactivate the heating element 132 and to increase and decrease the rotation of the laundry drum 106 at least once more to a contact speed, above the first speed threshold pumping device 120 is activated and below the second speed threshold the pumping device 120 is deactivated.
  • Figure 4 shows a schematic diagram which illustrates the course over time of several variables in a laundry care process, namely the course over time of the amount of water supplied via the dispenser 114, the activity of the pump 122 of the pumping device 120, the speed of the laundry drum 106 and the temperature of the washing liquid.
  • FIG 4 Diagram shown shows a washing-in phase of the laundry care method, in which fresh water or washing liquid is added to the washing drum 106 in several successive washing-in processes, as described above, for example, from the fresh water line 112 via the washing-in device 114 and the detergent container 116 Washing-in processes separated by periods in which no further fresh water is added to the washing drum 106 via the washing-in device 114, ie the washing-in device 114 is deactivated or closed.
  • control device 118 is designed to, at the end of one of the FIGS Figure 4 illustrated washing processes of the laundry care program, in which fresh water and detergent are flushed into the washing drum 106 by means of the washing device 114, to control the drive motor 105 of the washing drum 106 in such a way that the drive motor 105 drives the washing drum 106 reversibly over a first reversing period, and after the drive motor 105 when the pumping device 120 is deactivated, the laundry drum 106 has reversed at least once during the first reversing period, ie has rotated in one direction of rotation and in the opposite direction of rotation, to activate the pumping device 120 and to deactivate it at the end of a second pumping period 120.
  • the laundry drum 106 can first be brought up to a speed of, for example, 55 rpm in one direction of rotation and then to a speed of, for example, 55 rpm in the opposite direction of rotation. In this way it is achieved that in particular the items 108 lying on the inside of the laundry drum 106 are wetted with washing liquid via the jacket of the laundry drum 106.
  • control device 118 can be designed to, in the context of the first flushing-in process in FIG Figure 4 shown to substantially simultaneously activate the induction device 114 and the pumping device 120.
  • the corresponding first pumping period over which pumping device 120 is operated by control device 118 is shown in FIG Figure 4 marked with the letter "A".
  • the duration of the in Figure 4 The first pumping period marked with the letter "A” can only be a few seconds. The duration of the first pumping period can be shorter than the duration of the first flushing period.
  • the essentially simultaneous rinsing and pumping ensures that detergent residues which have not been dissolved so far are actively mixed with the washing liquid and less detergent residues which have not been dissolved so far are deposited in parts of the laundry care appliance 100, in particular on the bottom of the suds container 104 and / or in the tub-shaped suds container drain 134 , It is known from practice that the major portion of the detergent is flushed into the tub 104 together with the first four liters of fresh water.
  • the control device 118 can furthermore be designed to control the drive motor 105 of the laundry drum 106 in such a way that the laundry drum 106 is at least temporarily rotated at the application speed during the second pumping-over period described above.
  • Such a rotation of the laundry drum 106 at the application speed is shown in FIG Figure 4 shown in the period "D".
  • the application speed can be, for example, in a range from approximately 80 to approximately 500 rpm.
  • the rotation of the laundry drum 106 at this time, that is to say with simultaneous pumping, at the application speed leads to the items of laundry lying against the inside of the laundry drum due to the centrifugal forces and the washing liquid introduced into the laundry drum 106 by the pumping device 120 directly onto the washing liquid on the inside of the Laundry drum 106 fits adjacent jacket of laundry items 108. This ensures uniform wetting or moistening of almost all items of laundry 108 (even when the laundry drum 106 is fully loaded). Due to the centrifugal forces that occur during rotation at the application speed, the washing liquid is also pressed out of the laundry items 108 and is returned to the laundry drum 106 via the active pumping device 120 for further wetting of the laundry items 108.
  • both the above-described first reversing period and the above-described second pumping period end essentially simultaneously, as can be seen in FIG Figure 4 from the end of the respective periods "B", “C”, “D” and “E".
  • a respective rest phase begins with the simultaneous end of a first reversing period and a second pumping period.
  • Four such periods of rest are in Figure 4 marked with the digits "1", “2", “3” and "4".
  • the induction device 114 is also inactive during the respective resting phases "1" to "4".
  • the control device 118 is designed to, after the end of a first reversing period and a second pumping period, that is to say during a rest phase following the first reversing period and the second pumping period, for example in FIG Figure 4 shown rest phases "1", “2", “3” or "4", to detect the pressure of the washing liquid in the laundry drum 106 or the tub 104 and to adjust parameters of the laundry care program running on the control device 118 on the basis of this pressure.
  • This has the technical advantage, for example, that parameters of the laundry care program can be adapted to the actual load, for example in order to reduce energy consumption.
  • a pressure sensor can be provided in the depression 128 of the tub 104, which is connected to the control device 118.
  • FIG. 3 shows an exemplary schematic diagram that shows the pressure curve over time for two different loads, namely a full load and a half load, during part of the process shown in FIG Figure 4 illustrated washing phase in a laundry care device in the form of a washing machine 100 according to one embodiment (on the upper side) and a conventional washing machine (on the lower side).
  • the uniform parts of the respective curve shape which initially rise sharply and then flatten out correspond to those in FIG Figure 4 illustrated rest phases, whereby in Figure 5 two rest phases are shown.
  • a minimum pressure delta required for load differentiation is reached at an earlier point in time t 0 than in a conventional washing machine, in which this is done for load differentiation required minimum pressure delta is only reached at a later time t 0 '.
  • a washing machine 100 operated as described above, for example thus permits a faster and better estimate of the load than conventional washing machines, as a result of which the overall duration of the laundry care program can be reduced and the laundry care program can be adapted more quickly and better to the actual load, which in turn improves the washing result and energy consumption can be reduced.
  • control device 118 can be designed to operate the pumping device 120 during the second pumping period in such a way that the volume flow conveyed by the pumping device 120 is not less than a dripping speed of the laundry items 108.
  • This has the technical advantage, for example, that already at the beginning of the rest phase initiated by the deactivation of the drive motor 105 and the pumping device 120, for example at the beginning of FIG Figure 4 shown rest phases "1", “2", “3” or "4", the loading of the laundry care device 100 by the laundry items 108 can be estimated from the pressure of the washing liquid in the tub 104.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Cleaning In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Description

Die vorliegende Erfindung betrifft ein Wäschepflegegerät sowie ein Wäschepflegeverfahren.The present invention relates to a laundry care device and a laundry care method.

Ein Wäschepflegegerät ist im Rahmen der vorliegenden Erfindung insbesondere eine Waschmaschine, kann jedoch auch beispielsweise eine Maschine zum Spülen und/oder Imprägnieren von Wäschestücken sein. Diese weiteren Funktionen können auch in einer Waschmaschine integriert sein.In the context of the present invention, a laundry care appliance is in particular a washing machine, but can also be, for example, a machine for rinsing and / or impregnating laundry items. These additional functions can also be integrated in a washing machine.

Die Offenlegungsschrift EP 2 703 537 A1 zeigt eine Waschmaschine.The disclosure EP 2 703 537 A1 shows a washing machine.

Die Offenlegungsschrift EP 2 161 365 A2 zeigt eine Waschmaschine.The disclosure EP 2 161 365 A2 shows a washing machine.

Die Offenlegungsschrift EP 1 867 773 A1 zeigt eine Waschmaschine.The disclosure EP 1 867 773 A1 shows a washing machine.

Im Rahmen eines Wäschepflegeprogramms eines Wäschepflegegeräts, wie z.B. einer Waschmaschine, wird bei einem Einspülvorgang mittels einer Einspülvorrichtung ein Waschmittel aus einem Waschmittelaufnahmebehälter zusammen mit Frischwasser in die Wäschetrommel des Wäschepflegegeräts eingespült, um die in der Wäschetrommel vorliegenden Wäschestücke mit dem Gemisch aus Waschmittel und Frischwasser, das hierin auch als Lauge oder Waschflüssigkeit bezeichnet wird, zu benetzen. Um für eine eingehende und möglichst gleichförmige Benetzung bzw. Durchfeuchtung der Wäschestücke mit der Waschflüssigkeit zu sorgen, ist es z.B. aus der DE3401899A1 bekannt, mittels einer Umpumpvorrichtung Waschflüssigkeit aus der Wäschetrommel bzw. einem mit der Wäschetrommel verbundenen Laugenbehälter abzuführen und über eine Düse wieder auf die Wäschestücke in der Wäschetrommel aufzubringen. In der DE3401899A1 wird ferner ein Heizelement beschrieben, das am Boden des Laugenbehälters angeordnet ist und mit dem die Waschflüssigkeit auf eine Zieltemperatur erwärmt werden kann.As part of a laundry care program of a laundry care device, such as a washing machine, a detergent from a detergent receptacle together with fresh water is washed into the laundry drum of the laundry care device during a washing-in process by means of a washing-in device, in order to wash the laundry items in the laundry drum with the mixture of detergent and fresh water is also referred to herein as alkali or washing liquid. In order to ensure an in-depth and as uniform as possible wetting or moistening of the laundry items with the washing liquid, it is eg from the DE3401899A1 known to discharge washing liquid from the laundry drum or a tub connected to the laundry drum by means of a pumping device and to apply it again to the laundry items in the laundry drum via a nozzle. In the DE3401899A1 a heating element is also described, which is arranged on the bottom of the tub and with which the washing liquid can be heated to a target temperature.

Bei der in der DE3401899A1 beschriebenen Waschmaschine kann jedoch das Problem auftreten, dass bei einem Umpumpvorgang das Heizelement frei liegt und beschädigt werden kann. Eine Lösung dieses Problems wird in der EP1204792B1 beschrieben. Bei der in der EP1204792B1 beschriebenen Lösung kommen jedoch technisch verhältnismäßig aufwändige Mittel zum Einsatz.At the in the DE3401899A1 described washing machine, however, the problem may arise that the heating element is exposed during a pumping process and can be damaged. A solution to this problem is in the EP1204792B1 described. At the in the EP1204792B1 However, the solution described uses technically relatively complex means.

Die Offenlegungsschrift DE 10 2013 106 091 A1 zeigt ein Waschverfahren und eine Waschmaschine.The disclosure DE 10 2013 106 091 A1 shows a washing method and a washing machine.

Die Offenlegungsschrift EP 2 246 469 A1 zeigt eine Waschmaschine.The disclosure EP 2 246 469 A1 shows a washing machine.

Die Offenlegungsschrift EP 0 464 776 A1 zeigt einen Schutzmechanismus für ein Heizelement einer Waschmaschine.The disclosure EP 0 464 776 A1 shows a protective mechanism for a heating element of a washing machine.

Es ist die der Erfindung zugrundeliegende Aufgabe, ein Wäschepflegegerät und ein Wäschepflegeverfahren anzugeben, die, insbesondere im Lichte der vorstehend beschriebenen Nachteile, eine effizientere Pflege von Wäschestücken ermöglichen.It is the object on which the invention is based to specify a laundry care appliance and a laundry care method which, in particular in the light of the disadvantages described above, enable more efficient care of laundry items.

Diese Aufgabe wird durch Gegenstände mit den Merkmalen nach den unabhängigen Ansprüchen gelöst. Vorteilhafte Ausführungsformen der Erfindung sind Gegenstand der Figuren, der Beschreibung und der abhängigen Ansprüche.This object is achieved by objects with the features according to the independent claims. Advantageous embodiments of the invention are the subject of the figures, the description and the dependent claims.

Gemäß einem ersten Aspekt der Erfindung wird die Aufgabe durch ein Wäschepflegegerät gelöst mit einer rotierbar gelagerten Wäschetrommel zum Aufnehmen von Wäschestücken, einem Antriebsmotor zum Rotieren der Wäschetrommel, einer Umpumpvorrichtung zum Rezirkulieren von Waschflüssigkeit aus der Wäschetrommel heraus und wieder in die Wäschetrommel hinein, einem Heizelement zum Erwärmen der Waschflüssigkeit und einer Steuereinrichtung zum Ansteuern des Antriebsmotors, der Umpumpvorrichtung und des Heizelements gemäß eines im Betrieb auf der Steuereinrichtung ablaufenden Wäschepflegeprogramms. Dabei ist die Steuereinrichtung dazu ausgebildet ist, bei aktiviertem Heizelement die Umpumpvorrichtung zu deaktivieren, sobald die Menge der Waschflüssigkeit in der Wäschetrommel oder in einem Laugenbehälter, in dem die Wäschetrommel drehbar gelagert ist, unter einen Minimalmengenschwellenwert fällt. Dadurch wird erfindungsgemäß der Vorteil erreicht, dass ein Schutzmechanismus bereitgestellt wird, der das Heizelement vor einer Überhitzung schützt, indem dieses immer von einer Mindestmenge an Waschflüssigkeit bedeckt ist.According to a first aspect of the invention, the object is achieved by a laundry care device with a rotatably mounted laundry drum for receiving items of laundry, a drive motor for rotating the laundry drum, a pumping device for recirculating washing liquid out of the laundry drum and back into the laundry drum, and a heating element for Heating the washing liquid and a control device for controlling the drive motor, the pumping device and the heating element in accordance with a laundry care program running on the control device during operation. The control device is designed to deactivate the pumping device when the heating element is activated as soon as the amount of washing liquid in the washing drum or in a tub in which the washing drum is rotatably mounted falls below a minimum amount threshold. This has the advantage according to the invention that a protective mechanism is provided which protects the heating element against overheating, since it is always covered by a minimum amount of washing liquid.

In einer vorteilhaften Ausführungsform ist die Steuereinrichtung dazu ausgebildet, im Rahmen des Wäschepflegeprogramms, das Phasen vorsieht, in denen die Wäschetrommel mit einer Drehzahl im Bereich von Anlegedrehzahlen rotiert wird und die Umpumpvorrichtung aktiv ist, die Umpumpvorrichtung beim Hochfahren der Drehzahl der Wäschetrommel erst dann zu aktivieren, wenn die Drehzahl der Wäschetrommel einen ersten Drehzahlschwellenwert überschreitet. Dadurch wird beispielsweise der technische Vorteil erreicht, dass ohne großen technischen Aufwand sichergestellt werden kann, dass in der Wäschetrommel bzw. einem Laugenbehälter, in dem die Wäschetrommel drehbar gelagert ist, die Menge der Waschflüssigkeit immer groß genug ist, dass die Pumpe der Umpumpvorrichtung störungsfrei betrieben werden kann, also insbesondere keine Luft zieht. Bei Drehzahlen der Wäschetrommel unterhalb des ersten Drehzahlschwellenwerts kann es vorkommen, dass der Großteil der Waschflüssigkeit in den Wäschestücken gebunden ist.In an advantageous embodiment, the control device is designed, as part of the laundry care program, which provides phases in which the laundry drum is rotated at a speed in the range of the application speeds and the Pumping device is active to activate the pumping device only when the speed of the laundry drum is ramped up when the speed of the laundry drum exceeds a first speed threshold value. This achieves the technical advantage, for example, that it can be ensured without great technical effort that the amount of washing liquid in the washing drum or a tub in which the washing drum is rotatably mounted is always large enough for the pump of the pumping device to operate without problems can be, in particular no air. At speeds of the laundry drum below the first speed threshold, it can happen that the majority of the washing liquid is bound in the items of laundry.

In einer vorteilhaften Ausführungsform ist die Steuereinrichtung dazu ausgebildet, die Umpumpvorrichtung beim Runterfahren der Drehzahl der Wäschetrommel dann zu deaktivieren, wenn die Drehzahl der Wäschetrommel einen zweiten Drehzahlschwellenwert unterschreitet. Dadurch wird beispielsweise ebenfalls der technische Vorteil erreicht, dass ohne großen technischen Aufwand sichergestellt werden kann, dass in der Wäschetrommel bzw. einem Laugenbehälter, in dem die Wäschetrommel drehbar gelagert ist, die Menge der Waschflüssigkeit immer groß genug ist, dass die Pumpe der Umpumpvorrichtung störungsfrei betrieben werden kann, also insbesondere keine Luft zieht.In an advantageous embodiment, the control device is designed to deactivate the pump-around device when the speed of the laundry drum is reduced when the speed of the laundry drum falls below a second speed threshold value. This also achieves the technical advantage, for example, that it can be ensured without great technical effort that the amount of washing liquid in the laundry drum or in a tub in which the washing drum is rotatably mounted is always large enough for the pump of the pumping device to be fault-free can be operated, in particular no air is drawn.

Der erste Drehzahlschwellenwert kann gleich dem zweiten Drehzahlschwellenwert sein. Untersuchungen haben gezeigt, dass der erste und/oder der zweite Drehzahlschwellenwert vorzugsweise größer als ca. 50 U/min sein sollten. Eine Anlegedrehzahl kann beispielsweise in einem Bereich von ca. 80 bis ca. 500 U/min liegen.The first speed threshold can be equal to the second speed threshold. Studies have shown that the first and / or the second speed threshold value should preferably be greater than approximately 50 rpm. An application speed can be, for example, in a range from approximately 80 to approximately 500 rpm.

In einer vorteilhaften Ausführungsform ist die Steuereinrichtung dazu ausgebildet, den ersten und/oder den zweiten Drehzahlschwellenwert fortlaufend an die Menge der Waschflüssigkeit in der Waschtrommel anzupassen, wobei für eine größere Menge der Waschflüssigkeit der erste und/oder der Drehzahlschwellenwert erniedrigt wird und für eine kleinere Menge der Waschflüssigkeit der erste und/oder der zweite Drehzahlschwellenwert erhöht wird. Dadurch wird beispielsweise der technische Vorteil erreicht, dass das Wäschepflegeprogramm besser an einen jeweiligen Waschgang, der im Wesentlichen durch die Art und die Menge der Wäschestücke definiert wird, angepasst werden kann.In an advantageous embodiment, the control device is designed to continuously adapt the first and / or the second speed threshold value to the amount of washing liquid in the washing drum, the first and / or the speed threshold value being lowered for a larger amount of washing liquid and for a smaller amount the washing liquid the first and / or the second speed threshold value is increased. This has the technical advantage, for example, that the laundry care program is better suited to a particular wash cycle essentially defined by the type and amount of laundry items can be customized.

In einer vorteilhaften Ausführungsform umfasst das Wäschepflegegerät ferner einen Drucksensor, der dazu ausgebildet ist, den Druck der Waschflüssigkeit in der Wäschetrommel oder dem Laugenbehälter, in dem die Wäschetrommel drehbar gelagert ist, zu erfassen, wobei die Steuereinrichtung dazu ausgebildet ist, bei aktiviertem Heizelement die Umpumpvorrichtung zu deaktivieren, sobald der vom dem Drucksensor erfasst Druck unter einen Druckschwellenwert fällt. Dadurch wird beispielsweise der Vorteil erreicht, dass mit technisch einfachen Mitteln ein zusätzlicher Schutzmechanismus bereitgestellt wird, der das Heizelement vor einer Überhitzung schützt.In an advantageous embodiment, the laundry care device further comprises a pressure sensor, which is designed to detect the pressure of the washing liquid in the laundry drum or the tub in which the laundry drum is rotatably mounted, the control device being designed to, when the heating element is activated, the pumping device deactivate as soon as the pressure detected by the pressure sensor falls below a pressure threshold. This has the advantage, for example, that technically simple means provide an additional protective mechanism which protects the heating element from overheating.

In einer vorteilhaften Ausführungsform ist die Steuereinrichtung dazu ausgebildet, einen Zyklus, bei dem die Rotation der Wäschetrommel auf eine Anlegedrehzahl hochgefahren und wieder runtergefahren wird, die Umpumpvorrichtung oberhalb des ersten Drehzahlschwellenwerts aktiviert und unterhalb des zweiten Drehzahlschwellenwerts deaktiviert wird und das Heizelement aktiviert ist, wenigstens zwei Mal hintereinander durchzuführen. Dadurch wird beispielsweise der Vorteil erreicht, dass eine gleichmäßigere Temperaturverteilung in der Waschflüssigkeit und den Wäschestücken erzeugt wird.In an advantageous embodiment, the control device is designed to cycle at least two cycles in which the rotation of the laundry drum is raised to a placement speed and lowered again, the pumping device is activated above the first speed threshold value and deactivated below the second speed threshold value, and the heating element is activated Times in a row. This has the advantage, for example, that a more uniform temperature distribution is generated in the washing liquid and the laundry items.

In einer vorteilhaften Ausführungsform ist die Steuereinrichtung dazu ausgebildet, den Zyklus, bei dem die Rotation der Wäschetrommel auf eine Anlegedrehzahl hochgefahren und wieder runtergefahren wird, die Umpumpvorrichtung oberhalb des ersten Drehzahlschwellenwerts aktiviert und unterhalb des zweiten Drehzahlschwellenwerts deaktiviert wird und das Heizelement aktiviert ist, solange zu wiederholen, bis eine im Wesentlichen gleichmäßige Temperaturverteilung bei einer gewünschten Zieltemperatur erreicht ist. Dadurch wird beispielsweise der Vorteil erreicht, dass eine gleichmäßige Temperaturverteilung in der Waschflüssigkeit und den Wäschestücken erzeugt wird.In an advantageous embodiment, the control device is designed to activate the cycle in which the rotation of the laundry drum is raised to a placement speed and then lowered again, the pumping device is activated above the first speed threshold value and deactivated below the second speed threshold value, and the heating element is activated as long as repeat until a substantially uniform temperature distribution is achieved at a desired target temperature. This has the advantage, for example, that an even temperature distribution is generated in the washing liquid and the laundry items.

In einer Ausführungsform ist die Steuereinrichtung dazu ausgebildet, sobald eine im Wesentlichen gleichmäßige Temperaturverteilung bei der gewünschten Zieltemperatur erreicht ist, das Heizelement zu deaktivieren und die Rotation der Wäschetrommel wenigstens noch einmal auf eine Anlegedrehzahl hochzufahren und wieder runterzufahren, wobei oberhalb des ersten Drehzahlschwellenwerts die Umpumpvorrichtung aktiviert wird und unterhalb des zweiten Drehzahlschwellenwerts die Umpumpvorrichtung deaktiviert wird. Dadurch wird beispielsweise der Vorteil erreicht, dass eine gleichmäßige Temperaturverteilung in der Waschflüssigkeit und den Wäschestücken erzeugt wird.In one embodiment, as soon as a substantially uniform temperature distribution at the desired target temperature has been reached, the control device is designed to deactivate the heating element and at least once more to rotate the laundry drum up to a contact speed and again drive down, the pumping device being activated above the first speed threshold and the pumping device being deactivated below the second speed threshold. This has the advantage, for example, that an even temperature distribution is generated in the washing liquid and the laundry items.

In einer Ausführungsform ist vorgesehen, dass die Steuereinrichtung dazu ausgebildet ist, bei aktiviertem Heizelement die Umpumpeinrichtung kontinuierlich zu betreiben. Das heißt also, dass die Umpumpeinrichtung kontinuierlich betrieben wird, bis die Menge der Waschflüssigkeit in der Wäschetrommel unter den Minimalmengenschwellenwert fällt. Dadurch wird zum Beispiel ein effizientes Umpumpen bewirkt.In one embodiment it is provided that the control device is designed to operate the pumping device continuously when the heating element is activated. This means that the pumping device is operated continuously until the amount of washing liquid in the laundry drum falls below the minimum amount threshold. This results in efficient pumping, for example.

Kontinuierlich bedeutet das Gegenteil von impulsförmig. Das heißt also, dass die Umpumpeinrichtung solange aktiviert bleibt, bis die Menge der Waschflüssigkeit in der Wäschetrommel unter den Minimalmengenschwellenwert fällt.Continuously means the opposite of impulsive. This means that the pumping device remains activated until the amount of washing liquid in the laundry drum falls below the minimum amount threshold.

Gemäß einem zweiten Aspekt der Erfindung wird die Aufgabe gelöst durch ein Wäschepflegeverfahren für ein Wäschepflegegerät mit einer rotierbar gelagerten Wäschetrommel zum Aufnehmen von Wäschestücken, einem Antriebsmotor zum Rotieren der Wäschetrommel, einer Umpumpvorrichtung zum Rezirkulieren von Waschflüssigkeit aus der Wäschetrommel heraus und wieder in die Wäschetrommel hinein, einem Heizelement zum Erwärmen der Waschflüssigkeit und einer Steuereinrichtung zum Ansteuern des Antriebsmotors, der Umpumpvorrichtung und des Heizelements gemäß eines im Betrieb auf der Steuereinrichtung ablaufenden Wäschepflegeprogramms. Dabei umfasst das Wäschepflegeverfahren den Schritt, dass die Steuereinrichtung die Umpumpvorrichtung bei aktiviertem Heizelement deaktiviert, sobald die Menge der Waschflüssigkeit in der Wäschetrommel bzw. einem Laugenbehälter, in dem die Wäschetrommel drehbar gelagert ist, unter einen Minimalmengenschwellenwert fällt. Dadurch wird erfindungsgemäß der Vorteil erreicht, dass ein Schutzmechanismus bereitgestellt wird, der das Heizelement vor einer Überhitzung schützt.According to a second aspect of the invention, the object is achieved by a laundry care method for a laundry care device with a rotatably mounted laundry drum for receiving items of laundry, a drive motor for rotating the laundry drum, a pumping device for recirculating washing liquid out of the laundry drum and back into the laundry drum, a heating element for heating the washing liquid and a control device for controlling the drive motor, the pumping device and the heating element according to a laundry care program running on the control device during operation. The laundry care method comprises the step that the control device deactivates the pump-around device when the heating element is activated as soon as the amount of washing liquid in the laundry drum or a tub in which the laundry drum is rotatably mounted falls below a minimum amount threshold. This achieves the advantage according to the invention that a protective mechanism is provided which protects the heating element against overheating.

In einer vorteilhaften Ausführungsform aktiviert die Steuereinrichtung im Rahmen des Wäschepflegeprogramms, das Phasen vorsieht, in denen die Wäschetrommel mit einer Drehzahl im Bereich von Anlegedrehzahlen rotiert wird und die Umpumpvorrichtung aktiv ist, die Umpumpvorrichtung beim Hochfahren der Drehzahl der Wäschetrommel erst dann, wenn die Drehzahl der Wäschetrommel einen ersten Drehzahlschwellenwert überschreitet. Dadurch wird beispielsweise der technische Vorteil erreicht, dass ohne großen technischen Aufwand sichergestellt werden kann, dass in der Wäschetrommel bzw. einem Laugenbehälter, in dem die Wäschetrommel drehbar gelagert ist, die Menge der Waschflüssigkeit immer groß genug ist, dass die Pumpe der Umpumpvorrichtung störungsfrei betrieben werden kann, also insbesondere keine Luft zieht. Bei Drehzahlen der Wäschetrommel unterhalb des ersten Drehzahlschwellenwerts kann es vorkommen, dass der Großteil der Waschflüssigkeit in den Wäschestücken gebunden ist.In an advantageous embodiment, the control device activates as part of the laundry care program, which provides phases in which the laundry drum with a Rotation speed in the range of application speeds is rotated and the pumping device is active, the pumping device when the speed of the laundry drum is ramped up only when the speed of the laundry drum exceeds a first speed threshold value. This achieves the technical advantage, for example, that it can be ensured without great technical effort that the amount of washing liquid in the washing drum or a tub in which the washing drum is rotatably mounted is always large enough for the pump of the pumping device to operate without problems can be, in particular no air. At speeds of the laundry drum below the first speed threshold, it can happen that the majority of the washing liquid is bound in the items of laundry.

In einer vorteilhaften Ausführungsform deaktiviert die Steuereinrichtung die Umpumpvorrichtung beim Runterfahren der Drehzahl der Wäschetrommel dann, wenn die Drehzahl der Wäschetrommel einen zweiten Drehzahlschwellenwert unterschreitet. Dadurch wird beispielsweise ebenfalls der technische Vorteil erreicht, dass ohne großen technischen Aufwand sichergestellt werden kann, dass in der Wäschetrommel bzw. einem Laugenbehälter, in dem die Wäschetrommel drehbar gelagert ist, die Menge der Waschflüssigkeit immer groß genug ist, dass die Pumpe der Umpumpvorrichtung störungsfrei betrieben werden kann, also insbesondere keine Luft zieht.In an advantageous embodiment, the control device deactivates the pump-around device when the speed of the laundry drum is reduced when the speed of the laundry drum falls below a second speed threshold. This also achieves the technical advantage, for example, that it can be ensured without great technical effort that the amount of washing liquid in the laundry drum or in a tub in which the washing drum is rotatably mounted is always large enough for the pump of the pumping device to be fault-free can be operated, in particular no air is drawn.

Der erste Drehzahlschwellenwert kann gleich dem zweiten Drehzahlschwellenwert sein. Untersuchungen haben gezeigt, dass der erste und/oder der zweite Drehzahlschwellenwert vorzugsweise größer als ca. 50 U/min sein sollten. Eine Anlegedrehzahl kann beispielsweise in einem Bereich von ca. 80 bis ca. 500 U/min liegen.The first speed threshold can be equal to the second speed threshold. Studies have shown that the first and / or the second speed threshold value should preferably be greater than approximately 50 rpm. An application speed can be, for example, in a range from approximately 80 to approximately 500 rpm.

In einer vorteilhaften Ausführungsform passt die Steuereinrichtung den ersten und/oder den zweiten Drehzahlschwellenwert fortlaufend an die Menge der Waschflüssigkeit in der Waschtrommel bzw. dem Laugenbehälter an, wobei für eine größere Menge der Waschflüssigkeit der erste und/oder der Drehzahlschwellenwert erniedrigt wird und für eine kleinere Menge der Waschflüssigkeit der erste und/oder der zweite Drehzahlschwellenwert erhöht wird. Dadurch wird beispielsweise der technische Vorteil erreicht, dass das Wäschepflegeprogramm besser an einen jeweiligen Waschgang, der im Wesentlichen durch die Art und die Menge der Wäschestücke definiert wird, angepasst werden kann.In an advantageous embodiment, the control device continuously adjusts the first and / or the second speed threshold value to the amount of washing liquid in the washing drum or the tub, the first and / or the speed threshold value being lowered for a larger amount of washing liquid and for a smaller one Amount of washing liquid the first and / or the second speed threshold value is increased. This has the technical advantage, for example, that the laundry care program is better suited to a particular wash cycle essentially defined by the type and amount of laundry items can be customized.

In einer vorteilhaften Ausführungsform umfasst das Wäschepflegeverfahren ferner den Schritt, den Druck der Waschflüssigkeit in der Wäschetrommel oder dem Laugenbehälter, in dem die Wäschetrommel drehbar gelagert ist, zu erfassen, wobei die Steuereinrichtung die Umpumpvorrichtung bei aktiviertem Heizelement deaktiviert, sobald der erfasste Druck unter einen Druckschwellenwert fällt. Dadurch wird beispielsweise der Vorteil erreicht, dass mit technisch einfachen Mitteln ein zusätzlicher Schutzmechanismus bereitgestellt wird, der das Heizelement vor einer Überhitzung schützt.In an advantageous embodiment, the laundry care method further comprises the step of detecting the pressure of the washing liquid in the laundry drum or the tub in which the laundry drum is rotatably mounted, the control device deactivating the pumping device when the heating element is activated as soon as the detected pressure falls below a pressure threshold falls. This has the advantage, for example, that technically simple means provide an additional protective mechanism which protects the heating element from overheating.

In einer vorteilhaften Ausführungsform führt die Steuereinrichtung einen Zyklus, bei dem die Rotation der Wäschetrommel auf eine Anlegedrehzahl hochgefahren und wieder runtergefahren wird, die Umpumpvorrichtung oberhalb des ersten Drehzahlschwellenwerts aktiviert und unterhalb des zweiten Drehzahlschwellenwerts deaktiviert wird und das Heizelement aktiviert ist, wenigstens zwei Mal hintereinander durch. Dadurch wird beispielsweise der Vorteil erreicht, dass eine gleichmäßigere Temperaturverteilung in der Waschflüssigkeit und den Wäschestücken erzeugt wird.In an advantageous embodiment, the control device carries out a cycle in which the rotation of the laundry drum is raised to a placement speed and lowered again, the pumping device is activated above the first speed threshold value and deactivated below the second speed threshold value, and the heating element is activated, at least twice in succession , This has the advantage, for example, that a more uniform temperature distribution is generated in the washing liquid and the laundry items.

In einer vorteilhaften Ausführungsform wiederholt die Steuereinrichtung den Zyklus, bei dem die Rotation der Wäschetrommel auf eine Anlegedrehzahl hochgefahren und wieder runtergefahren wird, die Umpumpvorrichtung oberhalb des ersten Drehzahlschwellenwerts aktiviert und unterhalb des zweiten Drehzahlschwellenwerts deaktiviert wird und das Heizelement aktiviert ist, solange, bis eine im Wesentlichen gleichmäßige Temperaturverteilung bei einer gewünschten Zieltemperatur erreicht ist. Dadurch wird beispielsweise der Vorteil erreicht, dass eine gleichmäßige Temperaturverteilung in der Waschflüssigkeit und den Wäschestücken erzeugt wird.In an advantageous embodiment, the control device repeats the cycle in which the rotation of the laundry drum is ramped up to a feed speed and is lowered again, the pumping device is activated above the first speed threshold value and deactivated below the second speed threshold value, and the heating element is activated until an im Substantially uniform temperature distribution is achieved at a desired target temperature. This has the advantage, for example, that an even temperature distribution is generated in the washing liquid and the laundry items.

In einer Ausführungsform deaktiviert die Steuereinrichtung das Heizelement, sobald eine im Wesentlichen gleichmäßige Temperaturverteilung bei der gewünschten Zieltemperatur erreicht ist, und die Rotation der Wäschetrommel wird wenigstens noch einmal auf eine Anlegedrehzahl hoch- und wieder runtergefahren, wobei oberhalb des ersten Drehzahlschwellenwerts die Umpumpvorrichtung aktiviert wird und unterhalb des zweiten Drehzahlschwellenwerts die Umpumpvorrichtung deaktiviert wird. Dadurch wird beispielsweise der Vorteil erreicht, dass eine gleichmäßige Temperaturverteilung in der Waschflüssigkeit und den Wäschestücken erzeugt wird.In one embodiment, the control device deactivates the heating element as soon as an essentially uniform temperature distribution is achieved at the desired target temperature, and the rotation of the laundry drum is at least once again increased and decreased to a contact speed, the pumping device being activated above the first speed threshold value and the pumping device is deactivated below the second speed threshold. This will For example, the advantage is achieved that a uniform temperature distribution is generated in the washing liquid and the laundry items.

In einer Ausführungsform ist vorgesehen, dass die Steuereinrichtung bei aktiviertem Heizelement die Umpumpeinrichtung kontinuierlich betreibt. Das heißt also, dass die Umpumpeinrichtung kontinuierlich betrieben wird, bis die Menge der Waschflüssigkeit in der Wäschetrommel unter den Minimalmengenschwellenwert fällt. Dadurch wird zum Beispiel ein effizientes Umpumpen bewirkt.In one embodiment it is provided that the control device operates the pumping device continuously when the heating element is activated. This means that the pumping device is operated continuously until the amount of washing liquid in the laundry drum falls below the minimum amount threshold. This results in efficient pumping, for example.

Kontinuierlich bedeutet das Gegenteil von impulsförmig. Das heißt also, dass die Umpumpeinrichtung solange aktiviert bleibt, bis die Menge der Waschflüssigkeit in der Wäschetrommel unter den Minimalmengenschwellenwert fällt.Continuously means the opposite of impulsive. This means that the pumping device remains activated until the amount of washing liquid in the laundry drum falls below the minimum amount threshold.

Technische Funktionalitäten des Wäschepflegeverfahrens ergeben sich unmittelbar analog aus entsprechenden technischen Funktionalitäten des Wäschepflegegeräts und umgekehrt.Technical functionalities of the laundry care method result directly analogously from corresponding technical functionalities of the laundry care device and vice versa.

In einer Ausführungsform ist vorgesehen, dass das Wäschepflegeverfahren mittels des Wäschepflegegeräts aus- oder durchgeführt wird.In one embodiment it is provided that the laundry care method is carried out or carried out by means of the laundry care device.

In einer Ausführungsform ist das Wäschepflegegerät ausgebildet oder eingerichtet, das Wäschepflegeverfahren aus- oder durchzuführen.In one embodiment, the laundry care device is designed or set up to carry out or carry out the laundry care process.

Weitere Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im Folgenden näher beschrieben.Further exemplary embodiments of the invention are shown in the drawings and are described in more detail below.

Es zeigen:

Fig. 1
eine schematische Ansicht eines Wäschepflegegeräts;
Fig. 2
ein beispielhaftes schematisches Diagramm, das den zeitlichen Verlauf mehrerer Größen bei einem Wäschepflegeverfahren veranschaulicht;
Fig. 3
eine Detailansicht eines Ausschnitts des schematischen Diagramms von Figur 2;
Fig. 4
ein beispielhaftes schematisches Diagramm, das den zeitlichen Verlauf mehrerer Größen während einer Einspülphase eines Wäschepflegeverfahrens veranschaulicht; und
Fig. 5
ein beispielhaftes schematisches Diagramm, das den zeitlichen Druckverlauf für zwei unterschiedliche Beladungen während einer Einspülphase eines Wäschepflegeverfahrens bei einem Wäschepflegegerät in Form einer Waschmaschine gemäß einer Ausführungsform und einer herkömmlichen Waschmaschine veranschaulicht.
Show it:
Fig. 1
a schematic view of a laundry care device;
Fig. 2
an exemplary schematic diagram illustrating the temporal course of several sizes in a laundry care process;
Fig. 3
a detailed view of a section of the schematic diagram of Figure 2 ;
Fig. 4
an exemplary schematic diagram illustrating the temporal course of several variables during a washing phase of a laundry care method; and
Fig. 5
an exemplary schematic diagram illustrating the pressure over time for two different loads during a wash-in phase of a laundry care method in a laundry care device in the form of a washing machine according to one embodiment and a conventional washing machine.

Figur 1 zeigt eine schematische Darstellung einer Waschmaschine stellvertretend für ein allgemeines Wäschepflegegerät 100. Das Wäschepflegegerät 100 in Form einer Waschmaschine dient zum Waschen von Wäschestücken und ähnlichen Waschgütern mit einem Waschmittel. Hierbei kann die Waschmaschine gegebenenfalls auch als Waschtrockner ausgestaltet sein, um Wäschestücke oder ähnliche Waschgüter zu waschen und zu trocknen. Im Rahmen der Erfindung werden unter dem Begriff "Waschmittel" neben herkömmlichen Waschmitteln auch Behandlungszusätze, wie Weichspüler, Klarspüler oder Geruchsverbesserungsmittel in verschiedenen Formen (flüssig, gelförmig, pastös oder auch pulverförmig) verstanden. Figure 1 shows a schematic representation of a washing machine representative of a general laundry care device 100. The laundry care device 100 in the form of a washing machine is used to wash items of laundry and similar laundry items with a detergent. In this case, the washing machine can optionally also be configured as a washer dryer in order to wash and dry laundry or similar laundry items. In the context of the invention, in addition to conventional detergents, the term “detergent” also includes treatment additives such as fabric softener, rinse aid or odor-improving agent in various forms (liquid, gel-like, pasty or also powder-like).

Die Waschmaschine 100 von Figur 1 enthält in einem Maschinengehäuse 102 einen im dem Maschinengehäuse fixierten Laugenbehälter 104. Eine Wäschetrommel 106 ist in dem Laugenbehälter 104 um eine horizontale Drehachse drehbar gelagert und kann mittels eines Antriebsmotors 105 mit unterschiedlichen Drehzahlen in Rotation versetzt werden, der über eine elektronische Steuereinrichtung 118 ansteuerbar ist. In der Wäschetrommel 106 sind Wäschestücke 108 angedeutet, welche beim Drehen der Wäschetrommel 106 durch Mitnehmer 110 an der Innenseite der Wäschetrommel 106 angehoben werden und wieder herunterfallen. Dadurch findet beim Rotieren der Wäschetrommel 106 ein ständiges Umschichten der Wäschestücke 108 statt.The washing machine 100 from Figure 1 contains in a machine housing 102 a tub 104 fixed in the machine housing. A laundry drum 106 is rotatably mounted in the tub 104 about a horizontal axis of rotation and can be set in rotation at different speeds by means of a drive motor 105 which can be controlled by an electronic control device 118. In the laundry drum 106, items of laundry 108 are indicated, which are lifted when the laundry drum 106 is rotated by carriers 110 on the inside of the laundry drum 106 and fall down again. As a result, the laundry items 108 are constantly rearranged when the laundry drum 106 rotates.

Frischwasser kann mittels einer Einspülvorrichtung 114, beispielsweise in Form eines Einlassventils, von einer Frischwasserleitung 112 durch einen Waschmittelbehälter 116, der beispielsweise als Einspülschale ausgebildet sein kann und neben herkömmlichen Waschmitteln auch Behandlungszusätze, wie Weichspüler, Klarspüler, Geruchsverbesserungsmittel oder andere Wäschebehandlungsmittel in verschiedenen Formen (flüssig, gelförmig, pastös oder auch pulverförmig) enthalten kann, entweder direkt (wie in der Figur 1 schematisch dargestellt) oder über den Laugenbehälter 104 in die Wäschetrommel 106 eingebracht werden. Das Gemisch aus Frischwasser und Waschmittel wird hierin als Waschflüssigkeit oder Lauge bezeichnet. Zum Steuern der Frischwasserzufuhr ist die Einspülvorrichtung 114 ebenfalls mit der elektronischen Steuereinrichtung 118 verbunden.Fresh water can be fed from a fresh water line 112 through a detergent container 116, for example in the form of an inlet valve, through a detergent dispenser 116, which can be designed, for example, as a induction bowl and in addition to conventional ones Detergents can also contain treatment additives such as fabric softener, rinse aid, odor improver or other laundry treatment agent in various forms (liquid, gel-like, pasty or also powder-like), either directly (as in the Figure 1 schematically shown) or be introduced into the laundry drum 106 via the tub 104. The mixture of fresh water and detergent is referred to herein as washing liquid or lye. To control the fresh water supply, the induction device 114 is also connected to the electronic control device 118.

Der Laugenbehälter 104 ist an seinem unteren Ende mit einer nach unten ausgeformten Mulde 128 versehen, die eine Heizkammer 130 bildet. In der Heizkammer 130 ist ein elektrisches Heizelement 132 angeordnet, vorzugsweise ein Rohrheizkörper, mit dem die Waschflüssigkeit im Laugenbehälter 104 erwärmt werden kann. Zur Ansteuerung des elektrischen Heizelements 132 ist dieses ebenfalls mit der elektronischen Steuereinrichtung 118 verbunden, wie dies in Figur 1 schematisch dargestellt ist.The tub 104 is provided at its lower end with a downwardly shaped trough 128 which forms a heating chamber 130. An electrical heating element 132 is arranged in the heating chamber 130, preferably a tubular heating element with which the washing liquid in the tub 104 can be heated. To control the electrical heating element 132, this is also connected to the electronic control device 118, as shown in FIG Figure 1 is shown schematically.

Am Boden der Mulde 128 des Laugenbehälters 104 ist ein Laugenbehälterablauf 134 vorgesehen, der einerseits an eine Umpumpvorrichtung 120 und andererseits an eine Abpumpvorrichtung 144 angeschlossen ist.At the bottom of the depression 128 of the tub 104, a tub drain 134 is provided, which is connected on the one hand to a pumping device 120 and on the other hand to a pumping device 144.

Die Umpumpvorrichtung 120, die insbesondere dazu dient, die Wäschestücke 108 mehrere Male mit der Waschflüssigkeit zu durchfluten, umfasst eine Pumpe 122, eine Saugleitung 124 auf der Saugseite und eine Druckleitung 126 auf der Druckseite der Pumpe 122. Mittels der Umpumpvorrichtung 120 kann die Waschflüssigkeit vom unteren Ende des Laugenbehälters 104 zurück in die Wäschetrommel 106 auf die Wäschestücke 108 rezirkuliert werden. Dabei wird die über die Druckleitung 126 der Umpumpvorrichtung 120 zugeführte Waschflüssigkeit über eine Düse auf die Wäschestücke 108 in der Wäschetrommel 106 aufgebracht. Zur Ansteuerung der Umpumpvorrichtung 120, insbesondere der Pumpe 122, ist diese ebenfalls mit der elektronischen Steuereinrichtung 118 verbunden, wie dies in Figur 1 schematisch dargestellt ist.The pumping device 120, which serves in particular to flood the laundry items 108 several times with the washing liquid, comprises a pump 122, a suction line 124 on the suction side and a pressure line 126 on the pressure side of the pump 122 the lower end of the tub 104 can be recirculated back into the laundry drum 106 onto the laundry items 108. The washing liquid supplied via the pressure line 126 to the pumping device 120 is applied to the laundry items 108 in the laundry drum 106 via a nozzle. To control the pumping device 120, in particular the pump 122, this is also connected to the electronic control device 118, as shown in FIG Figure 1 is shown schematically.

Die Abpumpvorrichtung 144, die insbesondere dazu dient, im Laugenbehälter 104 befindliche Waschflüssigkeit abzupumpen und aus der Waschmaschine 100 abzuleiten, umfasst eine Pumpe 142 mit einer Saugleitung 140 und einer Druckleitung 146. Zur Ansteuerung der Abpumpvorrichtung 144, insbesondere der Pumpe 142, kann diese ebenfalls mit der elektronischen Steuereinrichtung 118 verbunden sein.The pumping device 144, which is used in particular to pump out washing liquid located in the tub 104 and to discharge it from the washing machine 100, comprises a pump 142 with a suction line 140 and a pressure line 146 Activation of the pumping device 144, in particular the pump 142, can also be connected to the electronic control device 118.

Eine erfindungsgemäße Ausgestaltung der elektronischen Steuereinrichtung 118 und deren Zusammenwirken mit den vorstehend beschriebenen Komponenten des Wäschepflegeräts 100 wird nachstehend im Detail im Rahmen eines erfindungsgemäßen Wäschepflegeverfahrens unter weiterer Bezugnahme auf die Figuren 2 und 3 beschrieben.An embodiment of the electronic control device 118 according to the invention and its interaction with the components of the laundry care appliance 100 described above is described in detail below in the context of an inventive laundry care method with further reference to FIG Figures 2 and 3 described.

Figur 2 zeigt ein schematisches Diagramm, das den zeitlichen Verlauf mehrerer Größen bei einem erfindungsgemäßen Wäschepflegeverfahren veranschaulicht, nämlich den zeitlichen Verlauf der Aktivität der Pumpe 122 der Umpumpvorrichtung 120 (d.h. Pumpe 122 an oder aus), der Drehzahl der Wäschetrommel 106 und der Temperatur der Waschflüssigkeit. Figure 2 shows a schematic diagram that illustrates the time course of several variables in a laundry care method according to the invention, namely the time course of the activity of the pump 122 of the pumping device 120 (ie pump 122 on or off), the speed of the laundry drum 106 and the temperature of the washing liquid.

Erfindungsgemäß ist die Steuereinrichtung 118 dazu ausgebildet, im Rahmen des Wäschepflegeprogramms bei aktiviertem Heizelement 132 die Umpumpvorrichtung 120 zu deaktivieren, sobald die Menge der Waschflüssigkeit in der Wäschetrommel 106 oder dem Laugenbehälter 104 unter einen Minimalmengenschwellenwert fällt. Dadurch wird beispielsweise der Vorteil erreicht, dass ein zusätzlicher Schutzmechanismus bereitgestellt wird, der das Heizelement 132 vor einer Überhitzung schützt.According to the invention, the control device 118 is designed to deactivate the pumping device 120 as part of the laundry care program when the heating element 132 is activated as soon as the amount of washing liquid in the laundry drum 106 or the tub 104 falls below a minimum amount threshold. This has the advantage, for example, that an additional protective mechanism is provided which protects the heating element 132 against overheating.

In einer vorteilhaften Ausführungsform ist die Steuereinrichtung 118 dazu ausgebildet, im Rahmen des Wäschepflegeprogramms, das Phasen vorsieht, in denen die Wäschetrommel 106 mit einer Drehzahl im Bereich von Anlegedrehzahlen rotiert wird und die Umpumpvorrichtung 120 aktiviert werden soll, die Umpumpvorrichtung 120 beim Hochfahren der Drehzahl der Wäschetrommel 106 erst dann zu aktivieren, wenn die Drehzahl der Wäschetrommel 106 einen ersten Drehzahlschwellenwert überschreitet.In an advantageous embodiment, the control device 118 is designed, in the context of the laundry care program, which provides phases in which the laundry drum 106 is rotated at a speed in the range of the application speeds and the pumping device 120 is to be activated, the pumping device 120 when the speed of the Only activate the laundry drum 106 when the speed of the laundry drum 106 exceeds a first speed threshold.

In Figur 2 sind zwei solche Phasen dargestellt, in denen die Wäschetrommel 106 mit einer Drehzahl im Bereich von Anlegedrehzahlen rotiert wird und die Umpumpvorrichtung 120 aktiv ist. Eine Detailansicht des Ausschnitts A von Figur 2 ist in Figur 3 dargestellt. Durch die erfindungsgemäße Ausgestaltung, die Umpumpvorrichtung 120 beim Hochfahren der Drehzahl der Wäschetrommel 106 erst dann zu aktivieren, wenn die Drehzahl der Wäschetrommel 106 einen ersten Drehzahlschwellenwert überschreitet, wird beispielsweise der technische Vorteil erreicht, dass ohne großen technischen Aufwand sichergestellt werden kann, dass in dem Laugenbehälter 104 die Menge der Waschflüssigkeit immer groß genug ist, dass die Pumpe 122 der Umpumpvorrichtung 120 störungsfrei betrieben werden kann, also insbesondere keine Luft zieht. Bei Drehzahlen der Wäschetrommel 106 unterhalb des ersten Drehzahlschwellenwerts kann es vorkommen, dass der Großteil der Waschflüssigkeit in den Wäschestücken gebunden ist.In Figure 2 Two such phases are shown in which the laundry drum 106 is rotated at a speed in the range of the application speeds and the pumping device 120 is active. A detailed view of section A from Figure 2 is in Figure 3 shown. By means of the configuration according to the invention, the pumping device 120 is only activated when the rotational speed of the laundry drum 106 is increased when the rotational speed of the Washing drum 106 exceeds a first speed threshold value, the technical advantage is achieved, for example, that it can be ensured without great technical effort that the amount of washing liquid in the suds container 104 is always large enough that the pump 122 of the pumping device 120 can be operated without problems, that is especially no air. At speeds of the laundry drum 106 below the first speed threshold value, it can happen that the majority of the washing liquid is bound in the items of laundry.

In einer vorteilhaften Ausführungsform ist die Steuereinrichtung 118 dazu ausgebildet, die Umpumpvorrichtung 120 beim Runterfahren der Drehzahl der Wäschetrommel 106 dann zu deaktivieren, wenn die Drehzahl der Wäschetrommel 106 einen zweiten Drehzahlschwellenwert unterschreitet. Dadurch wird beispielsweise ebenfalls der technische Vorteil erreicht, dass ohne großen technischen Aufwand sichergestellt werden kann, dass in dem Laugenbehälter 104 die Menge der Waschflüssigkeit immer groß genug ist, dass die Pumpe 122 der Umpumpvorrichtung 120 störungsfrei betrieben werden kann, also insbesondere keine Luft zieht.In an advantageous embodiment, the control device 118 is designed to deactivate the pumping device 120 when the speed of the laundry drum 106 is reduced when the speed of the laundry drum 106 falls below a second speed threshold value. This also achieves the technical advantage, for example, that it can be ensured without great technical effort that the amount of washing liquid in the suds container 104 is always large enough that the pump 122 of the pumping device 120 can be operated without problems, in particular that it does not draw air.

Der erste Drehzahlschwellenwert kann gleich dem zweiten Drehzahlschwellenwert sein. Untersuchungen haben gezeigt, dass der erste und/oder der zweite Drehzahlschwellenwert vorzugsweise größer als ca. 50 U/min sein sollten. Eine Anlegedrehzahl kann beispielsweise in einem Bereich von ca. 80 bis ca. 500 U/min liegen.The first speed threshold can be equal to the second speed threshold. Studies have shown that the first and / or the second speed threshold value should preferably be greater than approximately 50 rpm. An application speed can be, for example, in a range from approximately 80 to approximately 500 rpm.

In einer vorteilhaften Ausführungsform ist die Steuereinrichtung 118 dazu ausgebildet, den ersten und/oder den zweiten Drehzahlschwellenwert fortlaufend an die Menge der Waschflüssigkeit in der Waschtrommel 106 und/oder dem Laugenbehälter 104 anzupassen, wobei für eine größere Menge der Waschflüssigkeit der erste und/oder der Drehzahlschwellenwert erniedrigt wird und für eine kleinere Menge der Waschflüssigkeit der erste und/oder der zweite Drehzahlschwellenwert erhöht wird. Dadurch wird beispielsweise der technische Vorteil erreicht, dass das Wäschepflegeprogramm besser an einen jeweiligen Waschgang, der im Wesentlichen durch die Art und die Menge der Wäschestücke 108 definiert wird, angepasst werden kann.In an advantageous embodiment, the control device 118 is designed to continuously adapt the first and / or the second speed threshold value to the amount of the washing liquid in the washing drum 106 and / or the tub 104, the first and / or the for a larger amount of the washing liquid Speed threshold is lowered and the first and / or the second speed threshold is increased for a smaller amount of washing liquid. In this way, for example, the technical advantage is achieved that the laundry care program can be better adapted to a particular wash cycle, which is essentially defined by the type and amount of the laundry items 108.

In einer vorteilhaften Ausführungsform umfasst das Wäschepflegegerät 100 ferner einen Drucksensor, der dazu ausgebildet ist, den Druck der Waschflüssigkeit in der Wäschetrommel 106 bzw. im Laugenbehälter 104 zu erfassen, wobei die Steuereinrichtung 118 dazu ausgebildet ist, bei aktiviertem Heizelement 132 die Umpumpvorrichtung 120 zu deaktivieren, sobald der vom dem Drucksensor erfasst Druck unter einen Druckschwellenwert fällt. Dadurch wird beispielsweise der Vorteil erreicht, dass mit technisch einfachen Mitteln ein zusätzlicher Schutzmechanismus bereitgestellt wird, der das Heizelement 132 vor einer Überhitzung schützt.In an advantageous embodiment, the laundry care device 100 further comprises a pressure sensor, which is designed to detect the pressure of the washing liquid in the laundry drum 106 or in the tub 104, the control device 118 being designed to deactivate the pumping device 120 when the heating element 132 is activated , as soon as the pressure detected by the pressure sensor falls below a pressure threshold. This achieves the advantage, for example, that an additional protective mechanism is provided using technically simple means, which protects the heating element 132 against overheating.

In einer vorteilhaften Ausführungsform ist die Steuereinrichtung 118 dazu ausgebildet, einen Zyklus, bei dem die Rotation der Wäschetrommel 106 auf eine Anlegedrehzahl hochgefahren und wieder runtergefahren wird, die Umpumpvorrichtung 120 oberhalb des ersten Drehzahlschwellenwerts aktiviert und unterhalb des zweiten Drehzahlschwellenwerts deaktiviert wird und das Heizelement 132 aktiviert ist, wenigstens zwei Mal hintereinander durchzuführen. Dadurch wird beispielsweise der Vorteil erreicht, dass eine gleichmäßigere Temperaturverteilung in der Waschflüssigkeit und den Wäschestücken 108 erzeugt wird.In an advantageous embodiment, the control device 118 is designed to perform a cycle in which the rotation of the laundry drum 106 is ramped up and down again to a contact speed, the pumping device 120 is activated above the first speed threshold value and deactivated below the second speed threshold value, and the heating element 132 is activated is to perform at least twice in a row. This has the advantage, for example, that a more uniform temperature distribution is generated in the washing liquid and the laundry items 108.

In einer vorteilhaften Ausführungsform ist die Steuereinrichtung 118 dazu ausgebildet, den Zyklus, bei dem die Rotation der Wäschetrommel 106 auf eine Anlegedrehzahl hochgefahren und wieder runtergefahren wird, die Umpumpvorrichtung 120 oberhalb des ersten Drehzahlschwellenwerts aktiviert und unterhalb des zweiten Drehzahlschwellenwerts deaktiviert wird und das Heizelement 132 aktiviert ist, solange zu wiederholen, bis eine im Wesentlichen gleichmäßige Temperaturverteilung bei einer gewünschten Zieltemperatur erreicht ist. Dadurch wird beispielsweise der Vorteil erreicht, dass eine gleichmäßige Temperaturverteilung in der Waschflüssigkeit und den Wäschestücken 108 erzeugt wird.In an advantageous embodiment, the control device 118 is designed to activate the pumping device 120 above the first speed threshold value and below the second speed threshold value, and activate the heating element 132, and the heating element 132 is activated, the cycle in which the rotation of the laundry drum 106 is raised to a feed speed and lowered again is to be repeated until an essentially uniform temperature distribution is achieved at a desired target temperature. This has the advantage, for example, that an even temperature distribution is generated in the washing liquid and the laundry items 108.

In einer Ausführungsform ist die Steuereinrichtung 118 dazu ausgebildet, sobald eine im Wesentlichen gleichmäßige Temperaturverteilung bei der gewünschten Zieltemperatur erreicht ist, das Heizelement 132 zu deaktivieren und die Rotation der Wäschetrommel 106 wenigstens noch einmal auf eine Anlegedrehzahl hochzufahren und wieder runterzufahren, wobei oberhalb des ersten Drehzahlschwellenwerts die Umpumpvorrichtung 120 aktiviert wird und unterhalb des zweiten Drehzahlschwellenwerts die Umpumpvorrichtung 120 deaktiviert wird. Dadurch wird beispielsweise der Vorteil erreicht, dass eine gleichmäßige Temperaturverteilung in der Waschflüssigkeit und den Wäschestücken 108 erzeugt wird.In one embodiment, as soon as a substantially uniform temperature distribution at the desired target temperature is reached, the control device 118 is designed to deactivate the heating element 132 and to increase and decrease the rotation of the laundry drum 106 at least once more to a contact speed, above the first speed threshold pumping device 120 is activated and below the second speed threshold the pumping device 120 is deactivated. This has the advantage, for example, that an even temperature distribution is generated in the washing liquid and the laundry items 108.

Figur 4 zeigt ein schematisches Diagramm, das den zeitlichen Verlauf mehrerer Größen bei einem Wäschepflegeverfahren veranschaulicht, nämlich den zeitlichen Verlauf der über die Einspülvorrichtung 114 zugeführten Wassermenge, der Aktivität der Pumpe 122 der Umpumpvorrichtung 120, der Drehzahl der Wäschetrommel 106 und der Temperatur der Waschflüssigkeit. Wie dies der Fachmann erkennt, zeigt das in Figur 4 dargestellte Diagramm eine Einspülphase des Wäschepflegeverfahrens, bei der in mehreren zeitlich aufeinander folgenden Einspülvorgängen der Wäschetrommel 106 Frischwasser bzw. Waschflüssigkeit hinzugefügt wird, und zwar, wie beispielsweise vorstehend beschrieben, von der Frischwasserleitung 112 über die Einspülvorrichtung 114 und den Waschmittelbehälter 116. Dabei sind die einzelnen Einspülvorgänge durch Zeiträume getrennt, in denen der Wäschetrommel 106 über die Einspülvorrichtung 114 kein weiteres Frischwasser hinzugefügt wird, d.h. die Einspülvorrichtung 114 deaktiviert bzw. geschlossen ist. Figure 4 shows a schematic diagram which illustrates the course over time of several variables in a laundry care process, namely the course over time of the amount of water supplied via the dispenser 114, the activity of the pump 122 of the pumping device 120, the speed of the laundry drum 106 and the temperature of the washing liquid. How this is recognized by the expert shows in Figure 4 Diagram shown shows a washing-in phase of the laundry care method, in which fresh water or washing liquid is added to the washing drum 106 in several successive washing-in processes, as described above, for example, from the fresh water line 112 via the washing-in device 114 and the detergent container 116 Washing-in processes separated by periods in which no further fresh water is added to the washing drum 106 via the washing-in device 114, ie the washing-in device 114 is deactivated or closed.

Beispielhaft ist die Steuereinrichtung 118 dazu ausgebildet ist, am Ende eines der in Figur 4 dargestellten Einspülvorgänge des Wäschepflegeprogramms, bei dem mittels der Einspülvorrichtung 114 Frischwasser und Waschmittel in die Wäschetrommel 106 eingespült wird, den Antriebsmotor 105 der Wäschetrommel 106 derart anzusteuern, dass der Antriebsmotor 105 die Wäschetrommel 106 über einen ersten Reversierzeitraum hinweg reversierend antreibt, und, nachdem der Antriebsmotor 105 bei deaktivierter Umpumpvorrichtung 120 die Wäschetrommel 106 während des ersten Reversierzeitraums wenigstens einmal reversiert hat, d.h. in eine Drehrichtung und in die entgegengesetzte Drehrichtung rotiert hat, die Umpumpvorrichtung 120 zu aktivieren und am Ende eines zweiten Umpumpzeitraums 120 zu deaktivieren. Dabei kann die Wäschetrommel 106 zunächst auf eine Drehzahl von beispielsweise 55 U/min in der einen Drehrichtung und sodann auf eine Drehzahl von beispielsweise 55 U/min in der entgegengesetzten Drehrichtung gebracht werden. Hierdurch wird erreicht, dass insbesondere die an der Innenseite der Wäschetrommel 106 anliegenden Wäschestücke 108 über den Mantel der Wäschetrommel 106 mit Waschflüssigkeit benetzt werden.By way of example, the control device 118 is designed to, at the end of one of the FIGS Figure 4 illustrated washing processes of the laundry care program, in which fresh water and detergent are flushed into the washing drum 106 by means of the washing device 114, to control the drive motor 105 of the washing drum 106 in such a way that the drive motor 105 drives the washing drum 106 reversibly over a first reversing period, and after the drive motor 105 when the pumping device 120 is deactivated, the laundry drum 106 has reversed at least once during the first reversing period, ie has rotated in one direction of rotation and in the opposite direction of rotation, to activate the pumping device 120 and to deactivate it at the end of a second pumping period 120. The laundry drum 106 can first be brought up to a speed of, for example, 55 rpm in one direction of rotation and then to a speed of, for example, 55 rpm in the opposite direction of rotation. In this way it is achieved that in particular the items 108 lying on the inside of the laundry drum 106 are wetted with washing liquid via the jacket of the laundry drum 106.

In Figur 4 lässt sich das Reversieren der Wäschetrommel 106 beispielsweise an den zwei Bergen und Tälern des Drehzahlverlaufs vor den mit den Ziffern "1", "2", "3" oder "4" gekennzeichneten Ruhephasen erkennen. In Figur 4 fällt ein zweiter Umpumpzeitraum, in dem die Umpumpvorrichtung 120 aktiv ist, jeweils mit einem Teil der in Figur 4 mit den Buchstaben "B", "C", "D" und "E" gekennzeichneten Zeiträume zusammen.In Figure 4 the reversing of the laundry drum 106 can be recognized, for example, by the two peaks and valleys of the speed curve before the rest phases identified by the numbers "1", "2", "3" or "4". In Figure 4 a second pumping period in which the pumping device 120 is active falls with a part of the in FIG Figure 4 periods marked with the letters "B", "C", "D" and "E".

In einer Ausführungsform kann die Steuereinrichtung 118 dazu ausgebildet sein, im Rahmen des zeitlich ersten Einspülvorgangs der in Figur 4 dargestellten Einspülvorgänge im Wesentlichen gleichzeitig die Einspülvorrichtung 114 und die Umpumpvorrichtung 120 zu aktivieren. Der entsprechende erste Umpumpzeitraum, über den hinweg die Umpumpvorrichtung 120 von der Steuereinrichtung 118 betrieben wird, ist in Figur 4 mit dem Buchstaben "A" gekennzeichnet. Die Dauer des in Figur 4 mit dem Buchstaben "A" gekennzeichneten ersten Umpumpzeitraums kann nur ein paar Sekunden betragen. Dabei kann die Dauer des ersten Umpumpzeitraums kürzer als die Dauer des ersten Einspülzeitraums sein.In one embodiment, the control device 118 can be designed to, in the context of the first flushing-in process in FIG Figure 4 shown to substantially simultaneously activate the induction device 114 and the pumping device 120. The corresponding first pumping period over which pumping device 120 is operated by control device 118 is shown in FIG Figure 4 marked with the letter "A". The duration of the in Figure 4 The first pumping period marked with the letter "A" can only be a few seconds. The duration of the first pumping period can be shorter than the duration of the first flushing period.

Das im Wesentlichen gleichzeitige Einspülen und Umpumpen sorgt dafür, dass bisher nicht gelöste Waschmittelreste weiter aktiv mit der Waschflüssigkeit vermischt werden und sich weniger bisher nicht gelöste Waschmittelreste in Teilen des Wäschepflegeräts 100, insbesondere am Boden des Laugenbehälters 104 und/oder im schlauchförmigen Laugenbehälterablauf 134, ablagern. Aus der Praxis ist es bekannt, dass der größte Anteil des Waschmittels zusammen mit den ersten vier Litern Frischwasser in den Laugenbehälter 104 eingespült wird.The essentially simultaneous rinsing and pumping ensures that detergent residues which have not been dissolved so far are actively mixed with the washing liquid and less detergent residues which have not been dissolved so far are deposited in parts of the laundry care appliance 100, in particular on the bottom of the suds container 104 and / or in the tub-shaped suds container drain 134 , It is known from practice that the major portion of the detergent is flushed into the tub 104 together with the first four liters of fresh water.

Die Steuereinrichtung 118 kann ferner dazu ausgebildet sein, den Antriebsmotor 105 der Wäschetrommel 106 derart anzusteuern, dass während des vorstehend beschriebenen zweiten Umpumpzeitraums die Wäschetrommel 106 zumindest zeitweilig mit Anlegedrehzahl rotiert wird. Ein derartiges Rotieren der Wäschetrommel 106 mit Anlegedrehzahl ist in Figur 4 in dem Zeitraum "D" dargestellt. Die Anlegedrehzahl kann beispielsweise in einem Bereich von ca. 80 bis ca. 500 U/min liegen. Das Rotieren der Wäschetrommel 106 zu diesem Zeitpunkt, d.h. bei gleichzeitigem Umpumpen, mit Anlegedrehzahl führt dazu, dass die Wäschestücke aufgrund der Fliehkräfte an der Innenseite der Wäschetrommel anliegen und die von der Umpumpvorrichtung 120 in die Wäschetrommel 106 eingebrachte Waschflüssigkeit direkt auf den an der Innenseite der Wäschetrommel 106 anliegenden Mantel von Wäschestücken 108 trifft. Dies sorgt für gleichmäßige Benetzung bzw. Durchfeuchtung nahezu aller Wäschestücke 108 (auch bei Vollbeladung der Wäschetrommel 106). Durch die bei der Rotation mit Anlegedrehzahl auftretenden Fliehkräfte wird ferner die Waschflüssigkeit aus den Wäschestücken 108 herausgepresst und wird über die aktive Umpumpvorrichtung 120 für eine weitere Benetzung der Wäschestücke 108 der Wäschetrommel 106 wieder zugeführt.The control device 118 can furthermore be designed to control the drive motor 105 of the laundry drum 106 in such a way that the laundry drum 106 is at least temporarily rotated at the application speed during the second pumping-over period described above. Such a rotation of the laundry drum 106 at the application speed is shown in FIG Figure 4 shown in the period "D". The application speed can be, for example, in a range from approximately 80 to approximately 500 rpm. The rotation of the laundry drum 106 at this time, that is to say with simultaneous pumping, at the application speed leads to the items of laundry lying against the inside of the laundry drum due to the centrifugal forces and the washing liquid introduced into the laundry drum 106 by the pumping device 120 directly onto the washing liquid on the inside of the Laundry drum 106 fits adjacent jacket of laundry items 108. This ensures uniform wetting or moistening of almost all items of laundry 108 (even when the laundry drum 106 is fully loaded). Due to the centrifugal forces that occur during rotation at the application speed, the washing liquid is also pressed out of the laundry items 108 and is returned to the laundry drum 106 via the active pumping device 120 for further wetting of the laundry items 108.

In einer Ausführungsform enden sowohl der vorstehend beschriebene erste Reversierzeitraum als auch der vorstehend beschriebene zweite Umpumpzeitraum im Wesentlichen gleichzeitig, wie sich dies in Figur 4 dem Ende der jeweiligen Zeiträume "B", "C", "D" und "E" entnehmen lässt. In einer bevorzugten Ausführungsform beginnt mit dem gleichzeitigen Ende eines ersten Reversierzeitraums und eines zweiten Umpumpzeitraums eine jeweilige Ruhephase. Vier derartige Ruhephasen sind in Figur 4 mit den Ziffern "1", "2", "3" und "4" gekennzeichnet. In einer bevorzugten Ausführungsform ist auch die Einspülvorrichtung 114 während der jeweiligen Ruhephasen "1" bis "4" inaktiv.In one embodiment, both the above-described first reversing period and the above-described second pumping period end essentially simultaneously, as can be seen in FIG Figure 4 from the end of the respective periods "B", "C", "D" and "E". In a preferred embodiment, a respective rest phase begins with the simultaneous end of a first reversing period and a second pumping period. Four such periods of rest are in Figure 4 marked with the digits "1", "2", "3" and "4". In a preferred embodiment, the induction device 114 is also inactive during the respective resting phases "1" to "4".

In einer Ausführungsform ist die Steuereinrichtung 118 dazu ausgebildet, nach dem Ende eines ersten Reversierzeitraums und eines zweiten Umpumpzeitraums, d.h. während einer auf den ersten Reversierzeitraum und dem zweiten Umpumpzeitraum folgenden Ruhephase, beispielsweise den in Figur 4 dargestellten Ruhephasen "1", "2", "3" oder "4", den Druck der Waschflüssigkeit in der Wäschetrommel 106 oder dem Laugenbehälter 104 zu erfassen und auf der Grundlage dieses Druckes Parameter des auf der Steuereinrichtung 118 ablaufenden Wäschepflegeprogramms anzupassen. Dies hat beispielsweise den technischen Vorteil, dass Parameter des Wäschepflegeprogramms an die tatsächliche Beladung angepasst werden können, um beispielsweise den Energieverbrauch zu reduzieren. Für die Erfassung des Drucks der Waschflüssigkeit in dem Laugenbehälter 104 kann beispielsweise in der Mulde 128 des Laugenbehälters 104 ein Drucksensor vorgesehen sein, der mit der Steuereinrichtung 118 in Verbindung steht.In one embodiment, the control device 118 is designed to, after the end of a first reversing period and a second pumping period, that is to say during a rest phase following the first reversing period and the second pumping period, for example in FIG Figure 4 shown rest phases "1", "2", "3" or "4", to detect the pressure of the washing liquid in the laundry drum 106 or the tub 104 and to adjust parameters of the laundry care program running on the control device 118 on the basis of this pressure. This has the technical advantage, for example, that parameters of the laundry care program can be adapted to the actual load, for example in order to reduce energy consumption. For the detection of the pressure of the washing liquid in the tub 104, for example, a pressure sensor can be provided in the depression 128 of the tub 104, which is connected to the control device 118.

Figur 5 zeigt ein beispielhaftes schematisches Diagramm, das den zeitlichen Druckverlauf für zwei unterschiedliche Beladungen, nämlich eine Vollbeladung und eine Halbbeladung, während eines Teils der in Figur 4 dargestellten Einspülphase bei einem Wäschepflegegerät in Form einer Waschmaschine 100 gemäß einer Ausführungsform (auf der oberen Seite) und einer herkömmlichen Waschmaschine (auf der unteren Seite) darstellt. Die gleichförmigen zunächst stark ansteigenden und dann abflachenden Teile des jeweiligen Kurvenverlaufs entsprechen den in Figur 4 dargestellten Ruhephasen, wobei in Figur 5 zwei Ruhephasen dargestellt sind. Wie sich der Figur 5 entnehmen lässt, wird bei einem Wäschepflegegerät in Form einer Waschmaschine 100 gemäß einer Ausführungsform, das beispielsweise wie vorstehend beschrieben betrieben wird, ein für eine Beladungsdifferenzierung erforderliches minimales Druckdelta zu einem früheren Zeitpunkt t0 erreicht als bei einer herkömmlichen Waschmaschine, bei der das für eine Beladungsdifferenzierung erforderliche minimale Druckdelta erst zu einem späteren Zeitpunkt t0' erreicht wird. Eine wie beispielsweise vorstehend beschrieben betriebene Waschmaschine 100 erlaubt somit eine schnellere und bessere Abschätzung der Beladung als herkömmliche Waschmaschinen, wodurch die Gesamtdauer des Wäschepflegeprogramms reduziert werden kann und das Wäschepflegeprogramm schneller und besser an die tatsächliche Beladung angepasst werden, wodurch wiederum das Waschergebnis verbessert und der Energieverbrauch reduziert werden kann. Figure 5 FIG. 3 shows an exemplary schematic diagram that shows the pressure curve over time for two different loads, namely a full load and a half load, during part of the process shown in FIG Figure 4 illustrated washing phase in a laundry care device in the form of a washing machine 100 according to one embodiment (on the upper side) and a conventional washing machine (on the lower side). The uniform parts of the respective curve shape which initially rise sharply and then flatten out correspond to those in FIG Figure 4 illustrated rest phases, whereby in Figure 5 two rest phases are shown. How the Figure 5 With a laundry care device in the form of a washing machine 100 according to one embodiment, which is operated, for example, as described above, a minimum pressure delta required for load differentiation is reached at an earlier point in time t 0 than in a conventional washing machine, in which this is done for load differentiation required minimum pressure delta is only reached at a later time t 0 '. A washing machine 100 operated as described above, for example, thus permits a faster and better estimate of the load than conventional washing machines, as a result of which the overall duration of the laundry care program can be reduced and the laundry care program can be adapted more quickly and better to the actual load, which in turn improves the washing result and energy consumption can be reduced.

Alternativ oder zusätzlich kann die Steuereinrichtung 118 dazu ausgebildet sein, die Umpumpvorrichtung 120 während des zweiten Umpumpzeitraums derart zu betreiben, dass der von der Umpumpvorrichtung 120 geförderte Volumenstrom nicht kleiner als eine Abtropfgeschwindigkeit der Wäschestücke 108 ist. Dies hat beispielsweise den technischen Vorteil, dass bereits zu Beginn der durch das Deaktivieren des Antriebsmotors 105 und der Umpumpvorrichtung 120 eingeleiteten Ruhephase, beispielsweise zu Beginn der in Figur 4 dargestellten Ruhephasen "1", "2", "3" oder "4", die Beladung des Wäschepflegegeräts 100 durch die Wäschestücke 108 anhand des Druckes der Waschflüssigkeit in dem Laugenbehälter 104 abgeschätzt werden kann.Alternatively or additionally, the control device 118 can be designed to operate the pumping device 120 during the second pumping period in such a way that the volume flow conveyed by the pumping device 120 is not less than a dripping speed of the laundry items 108. This has the technical advantage, for example, that already at the beginning of the rest phase initiated by the deactivation of the drive motor 105 and the pumping device 120, for example at the beginning of FIG Figure 4 shown rest phases "1", "2", "3" or "4", the loading of the laundry care device 100 by the laundry items 108 can be estimated from the pressure of the washing liquid in the tub 104.

Alle in Verbindung mit einzelnen Ausführungsformen der Erfindung erläuterten und gezeigten Merkmale können in unterschiedlicher Kombination in dem erfindungsgemäßen Gegenstand vorgesehen sein, um gleichzeitig deren vorteilhafte Wirkungen zu realisieren.All of the features explained and shown in connection with individual embodiments of the invention can be provided in different combinations in the subject matter of the invention in order to simultaneously realize their advantageous effects.

Der Schutzbereich der vorliegenden Erfindung ist durch die Ansprüche gegeben und wird durch die in der Beschreibung erläuterten oder den Figuren gezeigten Merkmale nicht beschränkt.The scope of the present invention is given by the claims and is not limited by the features explained in the description or shown in the figures.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

100100
WäschepflegegerätLaundry care device
102102
Maschinengehäusemachine housing
104104
Laugenbehältertub
105105
Antriebsmotordrive motor
106106
Wäschetrommelwashing drum
108108
Wäschestückelaundry
110110
Mitnehmertakeaway
112112
FrischwasserleitungFresh water pipe
114114
EinspülvorrichtungFlushing device
116116
Waschmittelbehälterdetergent container
118118
Steuereinrichtungcontrol device
120120
UmpumpvorrichtungUmpumpvorrichtung
122122
Pumpepump
124124
Saugleitungsuction
126126
Druckleitungpressure line
128128
Muldetrough
130130
Heizkammerheating chamber
132132
Heizelementheating element
134134
LaugenbehälterablaufTub drain
140140
Saugleitungsuction
142142
Pumpepump
144144
Abpumpvorrichtungpumping device
146146
Druckleitungpressure line

Claims (15)

  1. Laundry care appliance (100) with a rotatably mounted laundry drum (106) for receiving laundry items (108), a drive motor (105) for rotating the laundry drum (106), a repumping apparatus (120) for recirculating wash liquid out from the laundry drum (106) and back into the laundry drum (106), a heating element (132) for heating the wash liquid and a control device (118) for actuating the drive motor (105), the repumping apparatus (120) and the heating element (132) in accordance with a laundry care program running on the control device (118) during operation,
    characterised in that
    the control device (118) is embodied, when the heating element (132) is activated, to deactivate the repumping apparatus (120) as soon as the amount of wash liquid in the laundry drum (106) falls below a minimum amount threshold value, so that a protection mechanism is provided which protects the heating element (132) from overheating by always covering it with a minimum amount of wash liquid.
  2. Laundry care appliance (100) according to claim 1, wherein the control device (118) is embodied, as part of the laundry care program, which provides phases in which the laundry drum (106) is rotated with a rotational speed in the range of setting speeds and the repumping apparatus (120) is active, to then activate the repumping apparatus (120) while ramping up the rotational speed of the laundry drum (106) when the rotational speed of the laundry drum (106) exceeds a first rotational speed threshold value.
  3. Laundry care appliance (100) according to claim 2, characterised in that the control device (118) is embodied to then deactivate the repumping apparatus (120) while ramping down the rotational speed of the laundry drum (106) when the rotational speed of the laundry drum (106) falls below a second rotational speed threshold value.
  4. Laundry care appliance (100) according to claim 2 or 3, characterised in that the control device (118) is embodied to adapt the first and/or the second rotational speed threshold value to the amount of wash liquid in the laundry drum (106), wherein for a larger amount of wash liquid, the first and/or the second rotational speed threshold value is lowered and for a smaller amount of wash liquid, the first and/or the second rotational speed threshold value is increased.
  5. Laundry care appliance (100) according to one of the preceding claims, characterised in that the laundry care appliance (100) further comprises a pressure sensor, which is embodied to record the pressure of the wash liquid in the laundry drum (106), wherein the control device (118) is embodied, when the heating element (132) is activated, to deactivate the repumping apparatus (120) as soon as the pressure recorded by the pressure sensor falls below a pressure threshold value.
  6. Laundry care appliance (100) according to one of the preceding claims, characterised in that the laundry care appliance (118) is embodied to perform a cycle, in which the rotation of the laundry drum (106) is ramped up to a setting speed and ramped down again, the repumping apparatus (120) is activated above the first rotational speed threshold value and deactivated below the second rotational speed threshold value and the heating element (132) is activated, at least two times in succession.
  7. Laundry care appliance (100) according to claim 6, characterised in that the control device (118) is embodied to repeat the cycle until a substantially even temperature distribution at a desired target temperature is achieved.
  8. Laundry care appliance (100) according to claim 5 or 6, characterised in that the control device (118) is embodied, as soon as a substantially even temperature distribution at the desired target temperature is achieved, to deactivate the heating element (132) and to ramp up the rotation of the laundry drum (106) at least one more time to a setting speed and ramp it down again, wherein the repumping apparatus (120) is activated above the first rotational speed value and the repumping apparatus (120) is deactivated below the second rotational speed value.
  9. Laundry care method for a laundry care appliance (100) with a rotatably mounted laundry drum (106) for receiving laundry items (108), a drive motor (105) for rotating the laundry drum (106), a repumping apparatus (120) for recirculating wash liquid out from the laundry drum (106) and back into the laundry drum (106), a heating element (132) for heating the wash liquid and a control device (118) for actuating the drive motor (105), the repumping apparatus (120) and the heating element (132) in accordance with a laundry care program running on the control device (118) during operation,
    characterised in that
    the laundry care method comprises the step that, when the heating element (132) is activated, the control device (118) deactivates the repumping apparatus (120) as soon as the amount of wash liquid in the laundry drum (106) falls below a minimum amount threshold value, so that a protection mechanism is provided which protects the heating element (132) from overheating by always covering it with a minimum amount of wash liquid.
  10. Laundry care method according to claim 9, characterised in that as part of the laundry care program, which provides phases in which the laundry drum (106) is rotated with a rotational speed in the range of setting speeds and the repumping apparatus (120) is active, to then activate the repumping apparatus (120) while ramping up the rotational speed of the laundry drum (106) when the rotational speed of the laundry drum (106) exceeds a first rotational speed threshold value.
  11. Laundry care method according to claim 10, characterised in that the control device (118) then deactivates the repumping apparatus (120) while ramping down the rotational speed of the laundry drum (106) when the rotational speed of the laundry drum (106) falls below a second rotational speed threshold value.
  12. Laundry care method according to claim 10 or 11, characterised in that the control device (118) adapts the first and/or the second rotational speed threshold value to the amount of wash liquid in the laundry drum (106), wherein for a larger amount of wash liquid, the first and/or the second rotational speed threshold value is lowered and for a smaller amount of wash liquid, the first and/or the second rotational speed threshold value is increased.
  13. Laundry care method according to one of claims 9 to 12, characterised in that the laundry care method further comprises the step of recording the pressure of the wash liquid in the laundry drum (106) by means of a pressure sensor, wherein the control device (118), when the heating element (132) is activated, deactivates the repumping apparatus (120) as soon as the pressure recorded by the pressure sensor falls below a pressure threshold value
  14. Laundry care method according to one of claims 9 to 13, characterised in that the control device (118) performs a cycle, in which the rotation of the laundry drum (106) is ramped up to a setting speed and ramped down again, the repumping apparatus (120) is activated above the first rotational speed threshold value and deactivated below the second rotational speed threshold value and the heating element (132) is activated, at least two times in succession.
  15. Laundry care method according to one of claims 9 to 14, characterised in that the control device (118), as soon as a substantially even temperature distribution at the desired target temperature is achieved, deactivates the heating element (132) and ramps up the rotation of the laundry drum (106) at least one more time to a setting speed and ramps it down again, wherein the repumping apparatus (120) is activated above the first rotational speed value and the repumping apparatus (120) is deactivated below the second rotational speed value.
EP16720824.8A 2015-07-08 2016-05-04 Laundry care apparatus and laundry care method Active EP3320138B1 (en)

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DE102015212742.7A DE102015212742A1 (en) 2015-07-08 2015-07-08 Laundry care device and laundry care process
DE102015212741.9A DE102015212741B4 (en) 2015-07-08 2015-07-08 Laundry care device and laundry care method
PCT/EP2016/059956 WO2017005390A1 (en) 2015-07-08 2016-05-04 Laundry care apparatus and laundry care method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019201845A1 (en) * 2019-02-13 2020-08-13 BSH Hausgeräte GmbH Household appliance for treating laundry
DE102019207240A1 (en) * 2019-05-17 2020-11-19 BSH Hausgeräte GmbH Laundry care device with one control
DE102019207351A1 (en) * 2019-05-20 2020-11-26 BSH Hausgeräte GmbH Laundry care device with one control
DE102019213014A1 (en) * 2019-08-29 2021-03-04 BSH Hausgeräte GmbH Laundry care device with one control

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3501760A1 (en) 1985-01-21 1986-07-31 Miele & Cie GmbH & Co, 4830 Gütersloh Method and apparatus for washing laundry in a drum-type washing machine
IT1246260B (en) * 1990-07-03 1994-11-17 Zanussi Elettrodomestici WATER LOAD MEASURING DEVICE FOR WASHING MACHINES.
DE4336350A1 (en) * 1993-10-25 1995-04-27 Bosch Siemens Hausgeraete Method for determining the amount of laundry in a laundry treatment machine
DE19908804C5 (en) * 1999-03-01 2014-05-15 BSH Bosch und Siemens Hausgeräte GmbH Method for operating a washing machine and automatically controlled washing machine for this purpose
DE102004004104A1 (en) * 2003-12-23 2005-07-28 BSH Bosch und Siemens Hausgeräte GmbH A method for reducing filter blockage during the prewash cycle of a dishwashing machine has the circulation pump, drain pump and fill valve intermittently operated
DE102004039662A1 (en) * 2004-08-16 2006-02-23 BSH Bosch und Siemens Hausgeräte GmbH Program-controlled washing machine
US20070118997A1 (en) * 2005-08-23 2007-05-31 Choi Du H Washing machine
US7941885B2 (en) * 2006-06-09 2011-05-17 Whirlpool Corporation Steam washing machine operation method having dry spin pre-wash
DE102007033493A1 (en) * 2007-07-18 2009-01-22 BSH Bosch und Siemens Hausgeräte GmbH Process for the treatment of laundry as well as suitable program-controlled washing machine
DE102008046465A1 (en) * 2008-09-09 2010-03-11 Miele & Cie. Kg Method of operating a washing machine and washing machine
EP2348151B1 (en) 2010-01-25 2017-07-05 Miele & Cie. KG Method for operating a washing machine with flow device
PL2246469T3 (en) 2010-02-16 2012-12-31 V Zug Ag Method for operating a washing machine and washing machine with circulation pump and spinning phase
EP2703537A1 (en) * 2012-08-29 2014-03-05 Electrolux Home Products Corporation N.V. Method for washing laundry in a laundry washing machine and laundry washing machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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CN107849775A (en) 2018-03-27
CN107849775B (en) 2020-03-31
WO2017005390A1 (en) 2017-01-12
EP3320137B1 (en) 2020-07-29
PL3320137T3 (en) 2021-02-08
WO2017005391A1 (en) 2017-01-12
EP3320138A1 (en) 2018-05-16
EP3320137A1 (en) 2018-05-16
CN107849777A (en) 2018-03-27
CN107849777B (en) 2020-06-09
PL3320138T3 (en) 2020-07-13

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