EP4056745A1 - Appareil d'entretien du linge doté d'une commande - Google Patents

Appareil d'entretien du linge doté d'une commande Download PDF

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Publication number
EP4056745A1
EP4056745A1 EP22155818.2A EP22155818A EP4056745A1 EP 4056745 A1 EP4056745 A1 EP 4056745A1 EP 22155818 A EP22155818 A EP 22155818A EP 4056745 A1 EP4056745 A1 EP 4056745A1
Authority
EP
European Patent Office
Prior art keywords
laundry
drum
washing liquid
speed
tub
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.)
Pending
Application number
EP22155818.2A
Other languages
German (de)
English (en)
Inventor
Yi-chun SHI
Marcel Totzek
Jörg Ziegler
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
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP4056745A1 publication Critical patent/EP4056745A1/fr
Pending legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/40—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of centrifugal separation of water from 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
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/22—Condition of the washing liquid, e.g. turbidity
    • 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
    • D06F2103/24—Spin speed; Drum movements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/26—Imbalance; Noise level
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/38—Time, e.g. duration
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
    • D06F2105/48—Drum speed
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/52—Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/58—Indications or alarms to the control system or to the user
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/16—Imbalance
    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/087—Water level measuring or regulating devices

Definitions

  • the present invention relates to a laundry care appliance with a controller.
  • a conventional laundry care appliance different methods are used to care for the laundry accommodated in the laundry drum.
  • the laundry drum is rotated within the tub filled with washing liquid, in particular at different speeds, in order to advantageously move the laundry accommodated in the laundry drum and the washing liquid accommodated in the tub.
  • Advantageous contact between the laundry and the wash liquid can thereby be provided to ensure an efficient transfer of laundry care substance, or heat, from the wash liquid to the laundry.
  • the object of the invention is achieved by a laundry care appliance with a tub for holding washing liquid, a laundry drum for holding laundry, the laundry drum being arranged in the tub, a drum drive for rotating the laundry drum, a fill level sensor for detecting a fill level of washing liquid in the tub and a control which is connected in terms of control to the drum drive and the filling level sensor, the control being designed to activate the drum drive for rotating the laundry drum at an ejection speed during an ejection time segment in order to transfer the laundry accommodated in the laundry drum to the Create laundry drum and expel the washing liquid bound to the laundry at least partially from the laundry, wherein the level sensor is designed during the expulsion period a level of washing liquid in the tub and wherein the controller is designed to activate the drum drive during a further expulsion time segment following the expulsion time segment in order to change the expulsion speed of the rotating laundry drum depending on the detected fill level of washing liquid in the tub.
  • the laundry drum rotates at an expulsion speed that is high enough for the laundry to be placed against the laundry drum due to the centrifugal force acting on it and the washing liquid bound to the laundry is expelled from the laundry, in particular along a radial expulsion direction.
  • the washing liquid expelled from the laundry is removed from the washing drum through openings in the washing drum and collects in the tub where the washing liquid can be detected by the filling level sensor.
  • the textile type of the laundry can also influence the laundry's ability to absorb or retain washing liquid.
  • the controller can draw conclusions about the intake behavior or expulsion behavior of the laundry.
  • the controller changes the speed of the rotating laundry drum depending on the detected fill level of washing liquid by controlling the drum drive. In particular, if a reduced level of washing liquid was detected during the expulsion period, the speed of the rotating laundry drum is increased in the subsequent further expulsion period in order to ensure effective wetting of the laundry with washing liquid.
  • the expulsion time section and/or the further expulsion time section can in particular be part of a wetting step, a washing step or a rinsing step of a laundry care program stored in the control of the laundry care appliance.
  • a laundry care appliance is understood to mean a device which is used for laundry care, such as a washing machine or a tumble dryer, in particular in the form of a washer-dryer.
  • a laundry care appliance is understood to mean a household laundry care appliance.
  • a laundry care device that is used as part of housekeeping and is used to treat laundry in normal household quantities.
  • the controller is designed to activate the drum drive during the further ejection time segment in order to increase the speed of the laundry drum rotating at the ejection speed, in particular to increase it to an increased ejection speed if the fill level of washing liquid in the tub is detected after the ejection time segment falls below a fill level threshold.
  • the filling level detection during the preceding, first expulsion period is used to control the evaluation of the expulsion behavior of the washing liquid bound to the laundry.
  • the controller compares the detected filling level with a predetermined filling level threshold value.
  • the filling level threshold value is dependent in particular on a large number of parameters, in particular on the amount of laundry, the type of laundry, the dry weight of the laundry, the total amount of washing liquid in the tub, the amount of washing liquid spun out of the laundry, the level of the system speed, the geometry of the Laundry drum and / or the geometry of the tub.
  • the filling level threshold value can be specified specifically as a function of the laundry care program that is being run.
  • the speed of the laundry drum is increased during the subsequent further ejection time segment, in particular increased to the increased ejection speed, in order to enable the detected filling level of washing liquid to reach the filling level threshold value after the further ejection time segment.
  • the controller is designed to end the further ejection time segment when a fill level of the washing liquid in the tub reached the fill level threshold value during the further ejection time segment.
  • reaching the filling level threshold represents the target point of the further expulsion period, so that the controller can end the further budding period, in particular can end immediately. After the further expulsion period, the controller can reduce the speed of the rotating laundry drum in particular.
  • the controller is designed to end the additional ejection time segment if a fill level of the washing liquid detected during the additional ejection time segment does not reach the fill level threshold value after a predetermined time interval during the additional ejection time segment.
  • the laundry care appliance has an imbalance sensor for detecting an imbalance in the rotating laundry drum, with the controller being designed to only activate the drum drive during the further ejection time segment in order to increase the ejection speed, in particular to the increased ejection speed, if the imbalance sensor does not detect an imbalance in the rotating laundry drum.
  • the imbalance sensor includes in particular a power detection element for detecting an electrical power value of the drum drive of the laundry drum, and/or a device for detecting a deflection or acceleration of an oscillating system of the laundry drum, and/or a 3D sensor for detecting a deflection of the laundry drum in all three spatial directions.
  • the spatial deflection of the oscillating system can be mathematically converted, in particular via the speed of the deflection of the oscillating system, into the acceleration of the deflection of the oscillating system.
  • the laundry care appliance has an imbalance sensor for detecting an imbalance in the rotating laundry drum, the controller being designed to activate the drum drive during the further ejection time segment in order to reduce the speed of the rotating laundry drum, in particular to reduce it to a reduced ejection speed, when the imbalance sensor detects an imbalance in the rotating laundry drum.
  • the controller is designed to end the additional ejection time period when the detected level of the washing liquid reaches a level threshold value, or the controller is designed to end the additional ejection time period when the recorded level of the washing liquid after a further predetermined time interval during the further expulsion period does not reach a level threshold.
  • the further bursting time section can be ended immediately, or after the further predetermined time interval has elapsed, the further bursting time section can be ended in order to prevent the further bursting time section from continuing indefinitely.
  • the controller is designed to activate the fill level sensor for detecting the fill level of the washing liquid during the expulsion time segment in the tub when a predetermined period of time has elapsed after the start of a laundry care program of the laundry care appliance or when the speed of the laundry drum has reached the expulsion speed.
  • the controller can recognize the beginning of the expulsion period by reaching the expulsion speed of the laundry drum, or the beginning of the expulsion period is stored by a fixed time interval after the start of the laundry care program.
  • the controller is designed to activate the drum drive during at least one contact time section before the expulsion time section in order to rotate the laundry drum at a system speed, the system speed comprising a speed of the laundry drum at which the laundry accommodated in the laundry drum during the rotation the laundry drum rests against the laundry drum.
  • the movement behavior of the laundry accommodated in the laundry drum can be advantageously influenced by changing the rotational speed of the laundry drum.
  • the system speed is lower than the output speed, so that when the laundry drum rotates at the system speed, the laundry is in contact with the laundry drum due to the centrifugal force acting, but the centrifugal force is not so great that washing liquid could be expelled from the laundry.
  • the controller is designed to activate the drum drive during at least one scooping period before the expulsion period in order to rotate the laundry drum at a scooping speed, the scooping speed comprising a speed of the laundry drum at which the washing liquid contained in the tub is at least partially through the laundry drum is also moved and falls onto the laundry accommodated in the laundry drum.
  • the movement behavior of the laundry accommodated in the laundry drum can be advantageously influenced by changing the rotational speed of the laundry drum.
  • the scoop speed is lower than the output speed and also lower than the system speed, so that when When the laundry drum rotates at the scooping speed, the laundry is not entrained by the washing drum, but the washing liquid present in the laundry drum is entrained by the rotating laundry drum as part of a scooping process and, in particular, falls onto the laundry in the laundry drum from above in order to ensure effective wetting of the laundry ensure.
  • the laundry drum has in particular a plurality of projections, in particular laundry scoops, which move or entrain the washing liquid during the rotation of the laundry drum.
  • the controller is designed to activate the drum drive during at least one intermediate time period before the expulsion time period in order to rotate the laundry drum in an intermediate speed range, with the intermediate speed range comprising a range of speeds of the laundry drum which lies between a system speed and a scoop speed of the Laundry drum extends.
  • the laundry care appliance has a washing liquid supply device for supplying washing liquid into the tub, with the controller being designed to supply the washing liquid supply device for supplying before the expulsion time segment, in particular before the scooping time segment and/or before the contact time segment and/or before the intermediate time segment Activate washing liquid in the tub.
  • the object of the invention is achieved by a method for caring for laundry in a laundry care appliance, the laundry care appliance having a tub for holding washing liquid, a laundry drum for holding laundry, with the laundry drum being arranged in the tub, a drum drive for rotating the laundry drum, a fill level sensor for detecting a fill level of washing liquid in the tub, and a controller which is connected to the drum drive and the fill level sensor in terms of control technology, the method comprising the following method steps, activating the drum drive to rotate the laundry drum at an exit speed the controller during an expulsion period of time in order to place the laundry accommodated in the laundry drum against the laundry drum and at least partially expel the washing liquid bound to the laundry from the laundry, activating the filling lstandsensors by the controller during the ejection time segment, in order to detect a fill level of washing liquid in the tub during the ejection time segment, and activation of the drum drive by the controller during a further ejection time segment following the ejection time segment in order to increase the ejection speed
  • the activation of the drum drive during the further ejection time segment includes increasing the ejection speed of the rotating laundry drum, in particular to an increased ejection speed if the level of washing liquid in the tub that is detected after the ejection time segment falls below a level threshold value.
  • the laundry care appliance has and comprises an imbalance sensor for detecting an imbalance in the rotating laundry drum activating the drum drive during the further ejection time segment, reducing the ejection speed of the rotating laundry drum, in particular to a reduced ejection speed, if the imbalance sensor detects an imbalance in the rotating laundry drum.
  • inventions identified as advantageous embodiments for the laundry care appliance according to the first aspect are also advantageous embodiments for the method according to the second aspect.
  • the laundry care appliance 100 comprises a dispensing tray 101 into which the laundry care substance, such as detergent or other liquid substances, can be filled.
  • the laundry care appliance 100 has an appliance housing 102 .
  • the laundry care appliance 100 includes an appliance door 103 for loading the laundry care appliance 100 with laundry.
  • the laundry care appliance 100 has a tub 105 for holding washing liquid, and has a laundry drum 107 for holding laundry.
  • the laundry drum 107 is arranged in the tub 105 .
  • the laundry care appliance 100 has a drum drive 109 for rotating the laundry drum 107 .
  • the tub 105 has a drain opening 111 .
  • the laundry care appliance 100 has a feed element 113 .
  • the drain opening 111 is fluidically connected to the feed element 113 by a liquid line 115 , a pump 117 for pumping washing liquid through the liquid line 115 being arranged in the liquid line 115 .
  • the pump 117 pumps washing liquid through the drain opening 111 from the tub 105 during an in 2 not shown pumping pump into the liquid line 115 and the washing liquid through the liquid line 115 and through the feed element 113 to the tub 105 and the laundry drum 107 out again.
  • the washing liquid can be pumped around effectively through the liquid line 115 during a laundry care process and can be fed back to the laundry in the laundry drum 107 .
  • the laundry care appliance 100 has a washing liquid supply device 118-1 for supplying washing liquid into the tub 105, the washing liquid supply device 118-1 being connected to the tub 105 by a supply line 118-2.
  • the washing liquid supply device 118-1 comprises an in 2 flushing tray 101, not shown, of the laundry care appliance 100 and/or an in 2 not shown fresh water connection of the laundry care appliance 100, wherein the controller 119 is designed to activate a washing liquid feed via the dispensing bowl 101 and/or the fresh water connection in order to feed washing liquid and/or fresh water into the laundry drum 107 as washing liquid.
  • the laundry care appliance 100 also has a filling level sensor 123 for detecting a filling level of washing liquid in the tub 105 .
  • the level sensor 123 is arranged in the tub 105 .
  • the filling level sensor 123 can be arranged in particular outside of the tub 105 and in this case can in particular detect the filling level of washing liquid in the tub 105 by means of communicating tubes in a further vessel, with the filling level sensor 123, in particular a pressure sensor, being connected to the further vessel, which is in particular closed, connected so that pressure can be built up.
  • the laundry care appliance 100 also includes a controller 119 which is connected to the pump 117, which is connected to the drum drive 109, to the washing liquid supply device 118-1 and to the level sensor 123 by a control connection 121 in each case.
  • the laundry care appliance 100 also includes an outlet line 125 which is fluidically connected to the liquid line 115 .
  • the pump 117 is formed during an in 2 Not shown pumping out washing liquid through the drain opening 111 from the tub 105, through the liquid line 115 and through the outlet line 125 from the laundry care appliance 100 to be pumped.
  • FIGS. 3A and 3B show schematic views of rotation processes of a laundry drum.
  • a washing drum 107 arranged in a tub 105 of a laundry care appliance 100 is shown schematically, with the washing drum 107 rotating at a low speed.
  • the laundry 127 accommodated in the laundry drum 107 and the free washing liquid 129 accommodated in the tub 105 are shown schematically.
  • the laundry drum 107 also has a plurality of projections 133 on the inside, which are designed to move the laundry 127 accommodated in the laundry drum 107 and the washing liquid 129 as a function of the rotational speed of the laundry drum 107 when the laundry drum 107 rotates.
  • a first direction of rotation 135-1 of the laundry drum 107 is in the Figure 3A shown.
  • a washing drum 107 arranged in a tub 105 of a laundry care appliance 100 is shown schematically, with the washing drum 107 rotating at a high speed, in particular at an exit speed.
  • the laundry 127 comes into contact with the laundry drum 107 due to the centrifugal force acting on it, and the washing liquid 129 bound to the laundry 127 is expelled from the laundry 127 along a radial expulsion direction 137, so that the expelled washing liquid 129 collects in the space between the laundry drum 107 and the tub 105.
  • a second direction of rotation 135-2 of the laundry drum 107, opposite the first direction of rotation 135-1, is in the Figure 3B shown.
  • FIG. 4 shows a schematic view of a laundry care process.
  • the first curve 139 shown shows along the ordinate axis 141 a rotational speed of a laundry drum 107 driven by a drum drive 109 as a function of time, which is plotted along the abscissa axis 143 .
  • the laundry drum 107 is rotated at different speed levels, beginning with a contact time segment 145 during which the laundry drum 107 rotates at a contact speed 147, the contact speed 147 corresponding to the speed of the laundry drum 107 at which the laundry 127 accommodated in the laundry drum 107 during of the rotation of the laundry drum 107 is applied to the laundry drum 107 by the centrifugal force acting on the laundry.
  • the contact time section 145 is followed by an intermediate time section 149, during which the laundry drum 107 is rotated in an intermediate speed range 151, the intermediate speed range defining a range of speeds of the laundry drum 107 includes, which extends between the system speed 147 and a scoop speed 153 of the laundry drum 107. In this case, the scooping speed 153 is lower than the contact speed 147.
  • the laundry 127 is no longer completely against the laundry drum 107, but rather the laundry 127 and the washing liquid 129 are entrained within the laundry drum 107, in particular by the projections 133 of the laundry drum 107.
  • the changing speed of the rotating laundry drum 107 a particularly dynamic movement of laundry 127 and washing liquid 129 within the laundry drum 107 can be achieved.
  • the intermediate time section 149 is followed by a scooping time section 155 during which the laundry drum 107 rotates at the scooping speed 153 .
  • the scoop speed 153 is lower than the system speed 147 and also lower than the intermediate speed range 151, so that during the scoop time segment 155 the laundry 127 is no longer or only to a small extent carried along by the projections 133 of the laundry drum 107, so that the laundry 127 during of the rotation of the laundry drum 107 remains in a lower region of the laundry drum 107.
  • the projections 133 of the laundry drum 107 take some of the washing liquid 129 with them during the scooping time segment 155, so that the washing liquid 129 carried along can drip onto the laundry 127 in the laundry drum 107, in particular from above, whereby an advantageous wetting of the laundry 127 is achieved.
  • the scooping time section 155 is again followed by an intermediate time section 149, during which the scooping speed 153 is increased within the intermediate speed range 151 until the laundry drum 107 again rotates at the contact speed 147 in the contact time section 145 that follows.
  • the sequence of the respective in 4 The time segments 149, 145, 149, 155 shown can be repeated or varied as desired.
  • the ejection speed 159 is between 100 rpm and 350 rpm and the duration of the ejection time segment 157 is between 10 min and 20 min, the ejection speed 159 and the duration depending on the size of the laundry drum 107, the amount of washing liquid and the Load amount of laundry 127 is.
  • the movement of the laundry 127 and the movement of the washing liquid 129 within the laundry drum 107 can advantageously be influenced, so that the laundry 127 is completely wetted with washing liquid 129 and the washing liquid 129 is evenly heated Laundry 127 can be ensured during the laundry care process.
  • the laundry care process described above ensures advantageous wetting of the laundry 127 with a wide variety of laundry loads, in particular with different laundry load quantities, different sizes of the individual items of laundry, different absorbencies of the individual items of laundry.
  • the expulsion speed 159 may happen during the expulsion period 157 that the expulsion speed 159 is not reached, e.g. due to an imbalance occurring in the rotating laundry drum 107 due to the accumulation of items of laundry in the laundry drum 107. However, it may also occur during the expulsion period 157 that despite reaching the expulsion speed 159 during the expulsion time section 157 not a sufficient amount of washing liquid 129 is expelled from the laundry 127, so that the desired complete wetting of the laundry 127 with washing liquid 129 during the expulsion time section 157 is not achieved.
  • FIGS. 5A and 5B show schematic views of a laundry care process according to a first embodiment.
  • the present invention is based on the finding that during the expulsion time segment 157 the effectiveness of the expulsion of the washing liquid 129 bound to the laundry 127 is detected by means of a filling level sensor 123 of the tub 105 designed as a pressure sensor.
  • the washing liquid 129 expelled from the laundry 127 during the expulsion period 157 emerges from the washing drum 107 through openings in the washing drum 107 and collects on the underside of the tub 105, where the amount of washing liquid can be detected by the level sensor 123.
  • a direct conclusion can thus be drawn about the effectiveness of the expulsion of washing liquid 129 from the laundry 127 from the filling level of washing liquid 129 in the tub 105 detected by the filling level sensor 123 during the expulsion time segment 157 .
  • the one in the Figure 5A The second curve 161 shown shows different speed ranges of a rotating laundry drum 107.
  • the third curve 163 shown shows different levels of washing liquid 129 in the tub 105 detected by a level sensor 123, which in the present case are output as pressure values measured by a pressure sensor.
  • the third curve 163 is temporally correlated with the second curve 161 .
  • the ejection speed 159 is identical during both ejection time segments 157-1, 157-2.
  • the third curve 163 shows different fill levels of washing liquid 129 in the tub 105 during the two expulsion periods 157-1 and 157-2.
  • the fill level of the washing liquid 129 reaches a fill level threshold value 165 during the first expulsion time segment 157-1, whereas the fill level of the washing liquid 129 does not reach the fill level threshold value 165 during the second expulsion time segment 157-2, but only reaches a reduced fill level value 165-1.
  • the filling level threshold value 165 defined as a target value depends on a large number of parameters, in particular on the amount of laundry, the type of laundry, the dry weight of the laundry, the total amount of washing liquid 129 in the tub 105, the amount of washing liquid 129 spun out of the laundry 127, the height the exit speed 159, the geometry of the laundry drum 107 and the geometry of the tub 105.
  • the reason for the different filling levels of washing liquid 129 during the first and second ejection time segment 157-1, 157-2 with the same ejection speed 159 is based on the unpredictable movement behavior of the laundry 127 in the rotating laundry drum 107, which means that different amounts of washing liquid 129 are in the first and second expulsion period 157-1, 157-2 are expelled from the laundry 127.
  • the controller 119 changes during the in Figure 5B illustrated fourth expulsion time section 157-4, the speed of the laundry drum 107 as a function of the level of washing liquid 129 detected by the level sensor 123.
  • the controller 119 increases during the in Figure 5B fourth expulsion time section 157-4 shown, the speed of the laundry drum 107 increases to an increased expulsion speed number 159-1, as a result of which more washing liquid 129 is expelled from the laundry 127, and the filling level of washing liquid 129 in the tub 105 detected by the filling level sensor 123 reaches the filling level threshold value 165.
  • the difference between the increased ejection speed number 159-1 and the ejection speed 159 is not too large, since excessively large an increase in the increased ejection speed number 159-1 can lead to undesirable resonances in the laundry drum 107. For this reason, in particular, the difference between the increased output speed number 159-1 and the output speed 159 is set to a value of less than or equal to 50 rpm.
  • the fill level sensor 123 is activated to measure the fill level in particular when the respective ejection time segment 157 begins, i.e. when the speed of the laundry drum 107 in particular reaches the ejection speed number 159, or in particular when a predetermined period of time stored in the laundry care program has elapsed, which started with the start of the ejection time segment 157 is correlated.
  • the monitoring function of the level sensor 123 is correlated with the start of the expulsion time segment 157 .
  • the fourth expulsion time section 157-4 ends when the detected fill level of the washing liquid 129 reaches the fill level threshold value 165 within a predetermined time interval.
  • the controller 119 in particular ends the fourth expulsion time section 157 - 4 immediately when the detected filling level reaches the filling level threshold value 165 .
  • the controller 119 is at all able to increase the ejection speed 159 to the increased ejection speed number 159-1 during the corresponding ejection time segment 157, there must be no imbalance in the rotating laundry drum 107 in order to prevent damage to the laundry drum 107.
  • a corresponding imbalance can occur, for example, as a result of laundry 127 piling up in the rotating laundry drum 127 .
  • the laundry care appliance 100 has, in particular, an imbalance sensor which is designed to detect an imbalance in the rotating laundry drum 107 .
  • the imbalance sensor includes, in particular, a power detection element for detecting an electrical power value of the drum drive 109 of the laundry drum 107, a device for detecting a deflection or acceleration of an oscillating system of the laundry drum 107 and/or a 3D sensor for detecting a deflection of the laundry drum 107 in all three spatial directions.
  • the controller 119 is in particular designed to only increase the speed of the laundry drum 107 to the increased ejection speed 159 - 1 during the expulsion time segment 157 if the imbalance sensor does not detect any imbalance in the rotating laundry drum 107 .
  • FIG. 6 shows a schematic view of a laundry care process according to a second embodiment.
  • the imbalance sensor detects during the in 6 illustrated fifth expulsion time segment 157-5 an imbalance in the rotating laundry drum 107, so that the controller 119 in the subsequent sixth expulsion time segment 157-6 reduces the expulsion speed 159 to a reduced expulsion speed 159-2 in order to avoid damage to the laundry care appliance 100.
  • the duration of the sixth expulsion period 157-6 is extended to a further time interval.
  • the fill level of the expelled washing liquid 129 in the tub 105 reaches the fill level threshold value 165 after the sixth expulsion period 157-6.
  • the sixth expulsion time section 157-6 ends when the further time interval of the sixth expulsion time section 157-6 has elapsed or when the detected fill level of the washing liquid 129 reaches the fill level threshold value 165 during the sixth expulsion period 157-6.
  • FIG. 7 shows a schematic representation of a method for caring for laundry in a laundry care appliance.
  • the method 200 comprises as a first method step the activation 201 of the drum drive 109 for rotating the laundry drum 107 at an ejection speed 159 by the controller 119 during an ejection time segment 157 in order to place the laundry 127 accommodated in the laundry drum 107 against the laundry drum 107 and the laundry against the laundry 127 bound washing liquid 129 at least partially expel from the laundry 127.
  • the method 200 includes the activation 203 of the filling level sensor 123 by the controller 119 during the expulsion time segment 157 in order to detect a filling level of washing liquid 129 in the tub 105 during the expulsion time segment 157 .
  • the method 200 comprises the activation 205 of the drum drive 109 by the controller 119 during a further ejection time segment 157 following the ejection time segment 157 in order to increase the ejection speed 159 of the rotating laundry drum 107 as a function of the detected fill level of washing liquid 129 in the tub 105 change.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP22155818.2A 2021-03-09 2022-02-09 Appareil d'entretien du linge doté d'une commande Pending EP4056745A1 (fr)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19908802A1 (de) * 1999-03-01 2000-09-07 Bsh Bosch Siemens Hausgeraete Verfahren zum Schleudern von nasser Wäsche
WO2009112222A1 (fr) 2008-03-11 2009-09-17 Aktiebolaget Electrolux (Publ) Procédé de traitement de linge et dispositif de traitement de linge
DE102017103193A1 (de) * 2017-02-16 2018-08-16 Miele & Cie. Kg Verfahren zum Betreiben eines Waschautomaten und Waschautomat
DE102017219043A1 (de) 2017-10-25 2019-04-25 BSH Hausgeräte GmbH Wäschepflegegerät mit einer Steuerung
EP3739099A1 (fr) * 2019-05-17 2020-11-18 BSH Hausgeräte GmbH Appareil d'entretien de linge doté d'une commande
EP3770314A1 (fr) * 2019-07-15 2021-01-27 Miele & Cie. KG Procédé de fonctionnement d'un lave-linge et lave-linge

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4009046C2 (de) 1990-03-21 1996-08-01 Aeg Hausgeraete Gmbh Verfahren zum Benetzen von Waschgut in einer programmgesteuerten Trommelwaschmaschine
DE102014104962A1 (de) 2014-04-08 2015-10-08 Miele & Cie. Kg Wasserzulaufsteuerung und Waschvollautomat
DE102019213014A1 (de) 2019-08-29 2021-03-04 BSH Hausgeräte GmbH Wäschepflegegerät mit einer Steuerung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19908802A1 (de) * 1999-03-01 2000-09-07 Bsh Bosch Siemens Hausgeraete Verfahren zum Schleudern von nasser Wäsche
WO2009112222A1 (fr) 2008-03-11 2009-09-17 Aktiebolaget Electrolux (Publ) Procédé de traitement de linge et dispositif de traitement de linge
DE102017103193A1 (de) * 2017-02-16 2018-08-16 Miele & Cie. Kg Verfahren zum Betreiben eines Waschautomaten und Waschautomat
DE102017219043A1 (de) 2017-10-25 2019-04-25 BSH Hausgeräte GmbH Wäschepflegegerät mit einer Steuerung
EP3739099A1 (fr) * 2019-05-17 2020-11-18 BSH Hausgeräte GmbH Appareil d'entretien de linge doté d'une commande
EP3770314A1 (fr) * 2019-07-15 2021-01-27 Miele & Cie. KG Procédé de fonctionnement d'un lave-linge et lave-linge

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DE102021202228A1 (de) 2022-09-15

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