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
  • D06F33/36—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of washing
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
  • D06F2103/02—Characteristics of laundry or load
  • D06F2103/04—Quantity, e.g. weight or variation of weight
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
  • D06F2103/18—Washing liquid level
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • 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
  • D06F2103/28—Air properties
  • D06F2103/34—Humidity
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • 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
  • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
  • D06F37/30—Driving arrangements 
  • D06F37/304—Arrangements or adaptations of electric motors

Definitions

• the present invention relates to a laundry care device with a controller.
• the laundry drum is rotated during a washing operation by a drum drive at a maximum rotational speed.
• the maximum rotational speed of the laundry drum can be controlled by a control of the laundry care appliance, for example, depending on the weight of the laundry or the selected laundry care program of the laundry care appliance.
• a control of the maximum rotational speed of the laundry drum does not necessarily allow a gentle laundry care for the laundry. For example, if laundry has jammed in the laundry drum, the drum drive will try to reach the maximum rotational speed, thereby increasing the torque of the laundry drum loaded with laundry and possibly damaging the laundry.
• DE 43 10 595 A1 discloses a washing machine with a laundry drum is disclosed, which is accelerated in a rotational direction to a first speed below a system speed and in another direction to a second speed above the system speed.
• a washing machine with a washing drum is disclosed, which is rotated in response to the weight of the laundry in the washing drum.
• the object according to the invention is achieved by a laundry care device having a laundry drum for receiving laundry, a drum drive for rotating the laundry drum, with a torque detector for detecting a torque of the laundry drum and a controller for controlling the drum drive, wherein the controller is designed Drum drive to drive during a rotation time interval to rotate the laundry drum at a first rotational speed when the detected torque falls below a torque threshold, wherein the controller is adapted to drive the drum drive during the rotation time interval to rotate the laundry drum at a second rotational speed, if the detected Torque exceeds the torque threshold, wherein the second rotational speed is less than the first rotational speed, and wherein the controller is formed, the e second rotational speed in response to the detected torque of the laundry drum to control to prevent damage to the laundry in the laundry drum.
• the rotation of the laundry drum increases the torque and the laundry in the laundry drum may be damaged.
• the laundry drum may be rotated by the drum drive at a maximum first rotational speed during rotational speed control of the control to ensure advantageous laundry care of the laundry during the laundry care operation.
• the controller controls the second Rotational speed as a function of the detected torque of the laundry drum loaded with laundry.
• the controller on the one hand an effective and efficient laundry care with a rotation of the laundry drum with the maximum first rotational speed and on the other hand a very gentle laundry care during a rotation of the laundry drum with a reduced second rotational speed by the laundry care device can be ensured.
• the forces acting on the laundry are reduced to prevent damage to the laundry during the washing process.
• a laundry care appliance is understood to mean a device which is used for laundry care, such as e.g. a washing machine or a tumble dryer.
• a laundry care appliance is understood as a household laundry care appliance. So a laundry care device, which is used in the context of household management, and is treated with the laundry in normal household quantities.
• the controller is configured to increase the second rotational speed to the first rotational speed during the rotational time interval when the detected torque is less than the torque threshold, and the controller is configured to reduce the first rotational speed to the second rotational speed during the rotational time interval the detected torque exceeds the torque threshold.
• the technical advantage is achieved that a dynamic control of the rotational speed of the laundry drum loaded with laundry in dependence on the detected torque is made possible by the controller.
• the laundry drum can be operated at the maximum first rotational speed to allow a particularly advantageous laundry care.
• the controller reduces the maximum first rotational speed to the second reduction speed in order to achieve a particularly gentle laundry care. If the detected torque decreases again below the torque threshold in the further course of the wash cycle, the rotational speed of the laundry drum can be increased again to the maximum first rotational speed. As a result, both a particularly effective and a gentle laundry care can be ensured.
• the controller is configured to increase the second rotational speed to the first rotational speed or to reduce the first rotational speed to the second rotational speed when the detected torque falls below the torque threshold value by a torque difference value or when the detected torque exceeds the torque threshold value exceeds the torque difference value.
• the laundry care device has a weight detection device for detecting a weight of laundry in the laundry drum
• the laundry care device has a tub for receiving washing liquid and a level sensor for detecting a level of washing liquid in the tub
• the laundry care apparatus comprises an air humidity sensor for detecting a humidity value within the laundry care appliance, wherein the controller is configured, the second rotational speed in dependence on the detected torque of the laundry drum, and the detected weight of the laundry, the to control the detected level of washing liquid in the tub and / or the detected humidity value.
• the laundry care appliance has a program selection device for selecting a plurality of selectable laundry care programs, and the controller is configured to control the first rotation speed in dependence on the selected laundry care program, and / or the control is configured, the second rotation speed depending on the detected torque of the laundry drum and the selected laundry care program to control.
• the technical advantage is achieved that by selecting the laundry care program by the user of the laundry care appliance, a preselection can be made, for example, if particularly delicate laundry, such as e.g. Silk or woolen textiles, is used.
• the control can take into account the selected laundry care program when controlling the first and second rotational speeds and thus ensure particularly advantageous control of the drum drive.
• the torque threshold value is a predetermined torque threshold value.
• the technical advantage is achieved that can be detected easily and quickly by the controller, whether the detected torque exceeds or exceeds the predetermined torque threshold.
• the predetermined torque threshold value can be determined, for example, by various reference measurements with a specific type of laundry care appliance.
• the laundry care device has a weight detection device for detecting a weight of laundry in the laundry drum, and / or the laundry care device has a tub for receiving washing liquid and a temperature sensor for detecting a temperature of washing liquid in the tub the controller is configured to determine the torque threshold as a function of the detected weight of the laundry or the detected temperature of the washing liquid.
• the technical advantage is achieved that a dynamic control of the torque threshold allows a particularly effective laundry care, since the maximum first rotational speed is reduced only to the second rotational speed, when the increase of the torque above the dynamically determined torque threshold on jamming of the laundry in the laundry drum based.
• the laundry care appliance has a program selection device for selecting a plurality of selectable laundry care programs, and the controller is configured to determine the torque threshold value as a function of the selected laundry care program.
• the controller is configured to detect the rotational speed of the laundry drum, wherein the controller is configured to disable the drum drive or drive the drum drive to rotate the laundry drum in an opposite rotational direction when the detected rotational speed is a rotational speed threshold below.
• Rotational speed threshold drops.
• the torque detection device has a power detection device for detecting an electrical power value of the drum drive, wherein the controller is designed to control the second rotation speed in dependence on the detected electrical power value.
• the technical advantage is achieved that a particularly effective detection of the torque of the laundry drum is ensured by the power detecting means for detecting an electric power value of the drum drive, since the torque is proportional to the electrical conduction value.
• the controller can advantageously determine the corresponding torque of the laundry drum from the detected electrical power value.
• the power detection element comprises a current sensor for detecting a supply current of the drum drive.
• the technical advantage is achieved that a particularly advantageous determination of the torque of the laundry drum is made possible by the detection of the supply current of the drum drive by the current sensor.
• the object is achieved by a method for controlling a drum drive of a laundry care device, wherein the Laundry-care device a laundry drum for receiving laundry, a drum drive for rotating the laundry drum, a
• a torque detecting device for detecting a torque of the laundry drum and a controller for controlling the drum drive comprising the steps of first driving the drum drive during a rotation time interval to rotate the laundry drum at a first rotational speed when the detected torque falls below a torque threshold, secondly actuating the drum drive during the rotation time interval to rotate the laundry drum at a second rotational speed when the detected torque exceeds a torque threshold, the second rotational speed being less than the first rotational speed, and controlling the second rotational speed in response to the detected torque of the laundry drum to prevent damage to the laundry in the laundry drum.
• the laundry care appliance has a program selection device for selecting a plurality of selectable laundry care programs, the method comprising controlling the second rotational speed in dependence on the detected torque of the laundry drum loaded with laundry and the selected laundry care program.
• the first driving of the drum drive during the rotation time interval comprises reducing the first rotation speed to the second rotation speed when the detected one Torque exceeds the torque threshold, and comprising the second driving the drum drive during the rotation time interval comprises increasing the second rotation speed to the first rotation speed when the detected torque falls below the torque threshold.
• the first driving comprises reducing the first rotational speed to the second rotational speed when the detected torque exceeds the torque threshold by a torque difference value
• the second driving comprises increasing the second rotational speed to the first rotational speed when the detected torque falls below the torque threshold by a torque difference value
• Fig. 1 is a schematic view of a laundry care device
• FIG. 2 shows a schematic view of a laundry care appliance with a controller for controlling a drum drive of the laundry care appliance
• FIG. 3 is a graphic representation of a rotation process of a laundry drum in a laundry care appliance
• FIG. 4 is a graph showing a torque change during a rotation operation of a laundry drum in a laundry care apparatus; and 5 shows a sequence of a method for controlling a drum drive of the laundry care appliance.
• Fig. 1 shows a schematic view of a general laundry care device 100, such as e.g. a washing machine.
• the laundry care appliance 100 comprises an induction bowl 101, into which wash-care substance, such as e.g. Detergent, can be filled.
• the laundry care appliance 100 comprises a door 103 for loading the laundry care appliance 100 with laundry.
• 2 shows a schematic view of a laundry care appliance with a controller for controlling a drum drive of the laundry care appliance.
• the laundry care device 100 comprises a suds container 105 for holding washing liquid and a laundry drum 107 arranged in the suds container 105 for receiving laundry 109.
• the tub 105 has a drain opening 1 1 1, which is arranged on an underside of the tub 105.
• the discharge opening 1 1 1 is connected to a line 1 13.
• a pump 1 15 for pumping washing liquid through the line 1 13 is arranged.
• the pump 1 15 is designed to pump washing liquid from the discharge port 1 1 1 from the tub 105 and pump out the pumped washing liquid through the line 1 13 and through a Ausnaturalö réelle 1 17 from the laundry care device 100.
• the pump 1 15 is connected by a pump connection 1 19 with a controller 121 of the laundry care device 100.
• the controller 121 is configured to control the pump 15.
• the laundry care device 100 further has a drum drive 123 for rotating the laundry drum 107, which is designed to rotate the laundry drum 107 at different rotational speeds.
• the drum drive 123 is connected to the controller 121 through a drum connection 125.
• the controller 121 is configured to control the drum drive 123.
• the laundry care apparatus 100 further comprises a torque detecting device 127 for detecting a torque of the laundry drum 107.
• the Torque detecting means 127 is connected to the controller 121 through a device connection 129 and is connected to the drum drive 123 through a drum drive connection 130.
• the laundry care apparatus 100 further comprises a program selector 131 for selecting a plurality of selectable laundry care programs.
• the program selector 131 is connected to the controller 121 through a selection link 133.
• the rotational speed of the laundry drum 107 is controlled in response to specific inputs.
• the most important inputs are, in particular, the type of textile of the laundry 109 and the type of the selected laundry care program.
• the laundry drum 107 is rotated during a laundry maintenance program at a maximum rotational speed.
• the maximum rotation speed can be either predetermined or dynamically regulated.
• the maximum rotational speed may depend on the weight of the laundry 109 in the laundry drum 107, the temperature of washing liquid in the tub 105, the humidity or a manual input by the user.
• the disadvantage of controlling the maximum rotational speed in conventional laundry care appliances 100 is that a reduction in the rotational speed of the laundry drum 107 does not necessarily mean that the laundry care process for the laundry 109 is performed gently. For example, if laundry 109 has been jammed in laundry drum 107, drum drive 123 will try to reach the maximum rotational speed, thereby increasing the torque of laundry drum 107 loaded with laundry 109 and possibly causing damage to laundry 109.
• the controller 121 is designed to control the drum drive 123 during a rotation time interval in the course of a rotational speed control in order to rotate the laundry drum 107 at a maximum first rotational speed, if that caused by the Torque detection means 127 detected torque of the laundry drum 107 loaded laundry drum 107 falls below a torque threshold.
• the controller 120 reduces the maximum first rotational speed of the laundry drum 107 to a second rotational speed, which is less than the first rotational speed, as part of a torque control.
• the controller 121 is configured to control the second rotational speed in response to the detected torque of the laundry drum 107 loaded with laundry 109 to avoid damaging the laundry 109 in the laundry drum 107.
• the controller 121 may switch from the torque control to the rotational speed control to again drive the laundry drum 107 at the maximum first rotational speed, but with the control 121 ensuring that during rotational speed control the detected torque does not exceed the torque threshold. However, if the detected torque should again exceed the torque threshold, the controller 121 reverts from the rotational speed control to the torque control, and the first rotational speed is again reduced to the second rotational speed.
• the controller 121 increases the second rotation speed only to the first rotation speed when the detected torque is less than the torque threshold value by a torque difference value, or the controller 121 reduces the first rotation speed only to the second rotation speed when the detected torque exceeds the torque threshold value by one Torque difference value exceeds. If the Torque difference value has a sufficient size, it can be prevented that too often between the rotational speed control and the torque control is changed.
• the torque threshold may include a predetermined or a dynamic torque threshold.
• the controller 121 may determine the torque threshold value, for example, in dependence on the weight of the laundry 109 detected by a weight detection device and / or in dependence on a temperature of the washing liquid detected by a temperature sensor.
• the controller 121 may further consider the laundry maintenance program selected by the user by means of a program selector 131.
• the torque threshold value may also change during a laundry care operation, and may have different values for dry and damp laundry 109 in the laundry drum 107, for example.
• the controller 121 may be configured to detect the rotational speed of the laundry drum 107 and to deactivate the drum drive 123 or to drive the drum drive 123 to drive the laundry drum 107 in an opposite rotational direction when the detected rotational speed is less than a rotational speed threshold. This ensures that, in the case of a sharp drop in the rotational speed below the rotational speed threshold, it is ensured that washing 109, possibly jammed on the laundry drum 107, can reliably be released again by deactivating the drum drive 123 or by changing the direction of rotation of the laundry drum 107, thereby damaging the Laundry 109 can be avoided.
• the advantage of the laundry care device 100 according to the invention is, in particular, that a corresponding control of the rotational speed of the laundry drum 107 enables a particularly effective and at the same time gentle laundry care process which avoids or at least reduces damage to sensitive laundry items.
• a slow change of the rotational speed of the laundry drum 107 can be ensured, whereby the laundry 109 can be turned particularly gently in the laundry drum 107.
• the torque detecting means 127 includes a power detecting element for detecting an electric power of the drum drive 123, a further sensor may be omitted.
• the torque-dependent control of the rotational speed can be activated or deactivated as required by the user of the laundry care device 100 in order to achieve particularly gentle laundry care of the laundry 109.
• Fig. 3 is a graph showing a rotation process of a laundry drum in a laundry care apparatus. 3 shows a time diagram of the rotational speed of the laundry drum 107, and the torque of the laundry drum 107, which are plotted along the ordinate axis 135 as a function of time, which is indicated along the abscissa axis 137.
• the first curve 139 shows the progression of the rotational speed of the laundry drum 107.
• the second curve 141 shows the progression of the torque of the laundry drum 107.
• different time sections 143, 145, 147, 149, 151, 153 are a rotation time interval shown.
• the controller 121 controls the drum drive 123 according to the rotation speed control to rotate the laundry drum 107 at a first maximum rotation speed 155, wherein the torque does not exceed the torque threshold value 157.
• the torque exceeds the torque threshold 157.
• the controller 121 changes from the Rotation speed control on the torque control.
• the controller 121 in this case controls the drum drive 123 to rotate the laundry drum 107 at a second rotational speed, which is less than the maximum, first rotational speed 155.
• the torque control is active and the controller 121 controls the second rotational speed in response to the detected torque of the laundry drum 107 loaded with laundry 109.
• the torque threshold 157 is not exceeded, thereby preventing damage to the laundry 109 can be.
• the controller 121 again changes from the torque control to the rotational speed control and the second rotational speed of the laundry drum 107 is increased again to the first maximum rotational speed 155.
• the controller 121 can ensure a compensation of the fluctuations by taking into account a feedback control or by the use of reference values.
• Fig. 4 is a graph showing a torque change during a rotation operation of a laundry drum 107 in a laundry care apparatus. 4 shows, in particular, a time representation of the supply current of the drum drive 123 of the laundry care device 100, which is plotted along the ordinate axis 135 as a function of the time which is indicated along the abscissa axis 137.
• the torque of the laundry drum 107 is proportional to the supply current of the drum drive 123
• the torque detecting means 127 includes a power detecting means for detecting an electric power value of the drum drive 123.
• the laundry drum 107 has a laundry load of 5 kg and by the drum drive 123 corresponding to the Rotation speed control of the controller 121 driven at a first rotational speed 155 of 50 revolutions per minute.
• the third curve 159 shows the course of the supply current of the drum drive 123. As shown in the third curve 159, the supply current of the drum drive 123 changes significantly during the wash cycle. The torque proportional to the supply current of the drum drive 123 of the laundry drum 107 loaded with laundry 109 thus also changes significantly. The significant change in the torque results from the different compression of the laundry 109 between the laundry drum 107 the housing of the laundry care device 100 and the door 103rd
• FIG. 5 shows a sequence of a method for controlling a drum drive of the laundry care appliance, which is described according to the embodiments of FIGS. 2, 3 and 4.
• the method 200 includes first driving 201 the drum drive 123 during a rotational time interval to rotate the laundry drum 107 at a first rotational speed 155 when the detected torque falls below a torque threshold 157.
• the method 200 includes second driving 203 of the drum drive 123 during the rotation time interval to rotate the laundry drum 107 at a second rotational speed when the detected torque exceeds a torque threshold 157, the second rotational speed being less than the first rotational speed 155.
• the method 200 includes controlling the second rotational speed 205 in response to the detected torque of the laundry drum 107 loaded with laundry 109 to avoid damaging the laundry 109 in the laundry drum 107.
• Second method step second activation of the drum drive

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

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=59093562

Family Applications (1)

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Cited By (2)

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Citations (4)

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• 2016
  • 2016-07-08 DE DE102016212525.7A patent/DE102016212525A1/de not_active Ceased
• 2017
  • 2017-06-21 PL PL17731883T patent/PL3481986T3/pl unknown
  • 2017-06-21 WO PCT/EP2017/065235 patent/WO2018007146A1/de active Search and Examination
  • 2017-06-21 RU RU2018144710A patent/RU2704905C1/ru active
  • 2017-06-21 EP EP17731883.9A patent/EP3481986B1/de active Active
  • 2017-06-21 CN CN201780042301.2A patent/CN109415863B/zh active Active

Patent Citations (4)

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