EP3739100A1 - Laundry appliance with controls - Google Patents

Abstract

The present invention relates to a laundry care appliance (100) with a tub (105) for holding washing liquid, the tub (105) having a drain opening (111) and an inlet opening (113) which are fluidically connected by a liquid line (115), a laundry drum (107) for receiving laundry, a washing liquid supply device (129) for supplying washing liquid into the tub (105), a pump (117) which is designed to pump washing liquid through the drain opening (111) into the liquid line (115). and the pumped-out washing liquid through the inlet opening (113) to the tub (105) again to wet the laundry in the laundry drum (107), a volume detection device (135) for detecting a volume (161-1, 161-2) of no washing liquid bound to the laundry, and a controller (119) for controlling the pump (117) and the washing liquid supply device (129), wherein the laundry care appliance (100) has a textile detection device (141) for detecting a textile type of the laundry accommodated in the laundry drum (107) and/or a weight detection device (137) for detecting a weight of the laundry accommodated in the laundry drum (107), characterized in that that the controller (119) is designed to determine an amount (157) of washing fluid to be supplied to the tub (105) by the washing fluid supply device (129) on the basis of a detected textile type of the laundry and/or on the basis of a detected weight of the laundry, that the controller (119) is designed to activate the washing liquid supply device (129) during a period of time (159) and to supply the specific amount of washing liquid (157) to the tub (105), that the controller (119) is designed to during the period of time (159) the activate the pump (117) to pump the supplied washing liquid through the liquid line (115) to pump, wherein the volume detection device (135) is designed to detect a volume (161-1, 161-2) of the washing liquid not bound to the laundry, and that the controller (119) is designed to deactivate the washing liquid supply device (129), if the detected volume (161-1, 161-2) exceeds a volume reference value (163), the volume reference value (163) being determined as a function of the detected textile type and/or the detected weight of the laundry.

Description

The present invention relates to a laundry care device with a controller.

In a conventional laundry care device, a control of the laundry care device is normally not aware of the absorbency of the laundry brought into the laundry drum. In order to ensure effective laundry care of the laundry to be cared for in this case, the laundry is usually washed in an oversaturated state, so that the laundry is supplied with a larger amount of washing liquid than the amount of washing liquid which would be required for effective laundry care. As a result of the oversaturation of the laundry with washing liquid, the consumption of the laundry care substance increases and an increased amount of heating energy must also be used to heat the larger amount of washing liquid.

In the DE 10 2016 212 490 A1 a laundry care device with a control is disclosed.

In the EP 2 348 151 A1 discloses a process of using the laundry in a program-controlled washing machine.

The object on which the invention is based is to provide a laundry care device in which an advantageous saturation of the laundry with washing liquid is ensured during a laundry care process.

This object is achieved by the objects with the features according to the independent claims. Advantageous embodiments are the subject matter of the dependent claims, the description and the drawings.

According to a first aspect, the object of the invention is provided by a laundry care device with a tub for receiving washing liquid, the tub having a drain opening and an inlet opening which are fluidically connected by a liquid line, a washing drum for receiving laundry, a washing liquid supply device for supplying washing liquid in the tub, a pump that is designed,

Pump off washing liquid through the drain opening into the liquid line and supply the pumped washing liquid through the inlet opening again to the tub in order to wet the laundry in the laundry drum, a volume detection device for detecting a volume of washing liquid not bound to the laundry, and a controller for controlling the pump and the washing liquid supply device released, wherein the laundry care device has a textile detection device for detecting a type of textile of the laundry received in the laundry drum and / or a weight detection device for detecting a weight of the laundry received in the laundry drum, the control being designed to supply one to the tub through the washing liquid supply device To determine the amount of washing liquid on the basis of a detected textile type of the laundry and / or on the basis of a detected weight of the laundry, the control being designed to wä to activate the washing liquid supply device during a period of time, and to supply the specific amount of washing liquid to the tub, the control being designed to activate the pump during the time segment in order to pump the supplied washing liquid through the liquid line, the volume detection device being designed to not display a volume to detect the washing liquid bound to the laundry, and the controller being designed to deactivate the washing liquid supply device when the detected volume exceeds a volume reference value, the volume reference value being determined as a function of the detected type of textile and / or the detected weight of the laundry.

This achieves the technical advantage that a desired, optimal saturation value of the laundry can be achieved by comparing the recorded volume with the volume reference value. This avoids oversaturation of the laundry with washing liquid and the consumption of detergent and heating energy consumption can be limited.

In order to determine the amount of washing liquid supplied to the tub in a particularly advantageous manner, the amount of washing liquid to be supplied is determined by the controller on the basis of the detected textile type of the laundry and / or on the basis of the detected weight of the laundry.

In particular, the amount of washing liquid to be supplied is determined on the basis of the type of textile of the laundry detected by the textile detection device. In particular, the amount of washing liquid to be supplied is determined on the basis of the weight of the laundry detected by the weight detection device. In particular, the amount of washing liquid to be supplied is determined on the basis of the textile type of laundry detected by the textile detection device and on the basis of the weight of the laundry detected by the weight detection device.

Depending on the required accuracy of determining the amount of washing liquid to be supplied, the laundry care device can have only one textile detection device, only one weight detection device or one textile detection device and one weight detection device in order to carry out the corresponding determination.

The deactivation of the washing liquid supply device, which correlates with the end of the supply of washing liquid, is subject to the condition that the volume of the washing liquid not bound to the laundry exceeds a volume reference value. The volume reference value is determined as a function of the textile type of laundry detected by the textile detection device and / or as a function of the weight of the laundry detected by the weight detection device.

Here, the volume reference value can be determined in particular as a function of the textile type of laundry detected by the textile detection device. In particular, the volume reference value can be determined as a function of the weight of the laundry detected by the weight detection device. In particular, the volume reference value can be determined as a function of the textile type of the laundry detected by the textile detection device and as a function of the weight of the laundry detected by the weight detection device.

By supplying the specific amount of washing liquid to the laundry, the laundry is advantageously saturated with washing liquid. Part of the amount of washing liquid supplied is not bound by the laundry and flows into the tub and can be detected by the volume detection device.

Thus, a correlation can be obtained between the saturation of the laundry and the volume of the washing liquid not bound to the laundry. If the recorded volume exceeds the volume reference value, the desired saturation of the laundry has been reached and the washing liquid supply device is deactivated.

The volume reference value is determined in particular as a function of the desired saturation, in particular 10%, 25%, 50%, 75% or 100% saturation, of the laundry. If, for example, only 50% saturation of the laundry is desired, the volume reference value can e.g. be halved.

By precisely setting the saturation of the laundry to be cared for with washing liquid, a resource-saving and energy-reduced washing process can be ensured and an optimal washing effect due to optimal wetting of the laundry can be made possible.

A laundry care device is understood to mean a device which is used for laundry care, e.g. a washing machine or tumble dryer. In particular, such a laundry care device is understood to mean a household laundry care device. So a laundry care device, which is used in the context of housekeeping, and with which laundry is treated in household quantities.

In an advantageous embodiment of the laundry care device, the controller is designed, if the recorded volume falls below the volume reference value, to repeat the period of time in order to determine an amount of washing liquid again, to re-supply the determined amount of washing liquid to the tub, and again to add a volume of the washing liquid not bound to the laundry detect, and deactivate the washing liquid supply device if the sum of the volume and the newly detected volume exceeds the volume reference value.

This achieves the technical advantage that the controller can incrementally control the supply of washing liquid to the tub until the sum of the volumes of the washing liquid not bound to the laundry exceeds the volume reference value, which leads to a deactivation of the washing liquid supply device.

In an advantageous embodiment of the laundry care device, the control is designed to determine the again determined amount of washing liquid as a function of the difference between the volume reference value and the volume recorded during the time segment, and / or the controller is designed to determine the again determined amount of washing liquid based on the detected type of textile Laundry and / or to determine based on the detected weight of the laundry.

This achieves the technical advantage that the amount of washing liquid determined again can be less than the amount of washing liquid determined during the time segment, so that the laundry can be prevented from being oversaturated with washing liquid. This is achieved by taking into account the difference between the volume of washing liquid already supplied during the laundry period and the volume reference value and / or the type of textile and / or the weight of the laundry being taken into account when determining the again determined washing liquid quantity.

In an advantageous embodiment of the laundry care device, the controller is designed to deactivate the pump during the time segment in order to stop the pumping of the washing liquid through the liquid line when a volume flow value determined as a function of the recorded volume falls below a minimum volume flow value.

This has the technical advantage that the end of the pumping process can be indicated to the control unit if the volume flow rate falls below the minimum value. A drop in the recorded volume flow below the minimum volume flow value indicates to the control that there is a very small amount of washing liquid available for pumping and that the pumping process can therefore be ended.

In an advantageous embodiment of the laundry care device, the laundry care device has a feed sensor which is designed to detect the amount of washing liquid supplied by the washing liquid supply device.

This has the technical advantage that the amount of washing liquid supplied during the respective time segment is available to the controller through the supply sensor.

In an advantageous embodiment of the laundry care device, the weight detection device comprises a weighing device for weighing a weight of the laundry received in the laundry drum, a device for detecting a lowering of a vibration system of the laundry drum and / or a device for detecting performance parameters of the drum drive of the laundry drum.

This has the technical advantage that the weight detection device ensures an advantageous weight detection of the laundry.

In an advantageous embodiment of the laundry care device, the laundry care device has a program selection device for selecting a laundry care program from a plurality of laundry care programs, the textile detection device being designed to detect a textile type of the laundry based on the selected laundry care program.

This has the technical advantage that the textile detection device can effectively detect the type of textile on the basis of the selected laundry care program.

In an advantageous embodiment of the laundry care device, the textile detection device comprises an optical sensor for detecting material properties of a textile type of the laundry, the textile detection device being designed to detect a textile type of the laundry based on the detected material properties.

This has the technical advantage that an effective direct detection of the textile type of the laundry is ensured.

In an advantageous embodiment of the laundry care device, the laundry care device has a drum drive for rotating the laundry drum, and the controller is designed to activate the drum drive while the washing liquid is being pumped through the liquid line, in order to set the laundry drum at a speed, in particular with a system speed, in particular between 100 rpm and 200 rpm to rotate to lay the laundry on the laundry drum.

This has the technical advantage that by rotating the washing drum during the pumping over process, particularly effective wetting of the washing with washing liquid can be ensured. In particular, the laundry drum can be rotated at a system speed which is in particular between 100 rpm and 200 rpm. When the laundry drum rotates at the application speed, the laundry rests against the laundry drum, so that it can be ensured that the washing liquid that is pumped around wets the laundry particularly advantageously.

In an advantageous embodiment of the laundry care device, the volume detection device is designed to detect a volume of the washing liquid circulated by the pump through the liquid line during the time segment in order to detect the volume of the washing liquid not bound to the laundry.

This has the technical advantage that the volume detection device can detect the corresponding volume of the washing liquid not bound to the laundry in the time segment directly during the pumping over process. In particular, the volume of the pumped washing liquid corresponds to the volume of the washing liquid not bound to the laundry.

In an advantageous embodiment of the laundry care device, the volume detection device comprises a flow sensor arranged in the liquid line for detecting a volume flow of the washing liquid pumped through the liquid line, and / or the volume detection device comprises a power detection element for detecting an electrical power value of the pump.

This achieves the technical advantage that the elements can ensure effective detection of the volume of the washing liquid by the volume detection device. If the volume detection device comprises a flow sensor, the volume of the washing liquid pumped around can advantageously be detected based on the detected volume flow of the washing liquid pumped through the liquid line by the pump, and thus the volume of the washing liquid not bound to the laundry can be detected.

If the volume detection device comprises a power detection element for detecting an electrical power value of the pump, the electrical power value detected by the power detection element can advantageously be correlated with the volume flow of the washing liquid pumped through the liquid line by the pump in order to carry out an advantageous volume detection, whereby depending on the time the through the Pump pumped volume can be obtained, and thus the volume of the washing liquid not bound to the laundry can be detected.

In an advantageous embodiment of the laundry care device, the laundry care device has a drum drive for rotating the laundry drum, and the control is designed to activate the drum drive after the washing liquid has been pumped through the liquid line in order to spin free washing liquid bound to the laundry in order to release an amount of washing liquid thrown out to obtain, wherein the volume detection device is designed to detect a volume of the circulated washing liquid thrown free in order to detect the volume of the washing liquid not bound to the laundry.

This achieves the technical advantage that the volume of the washing liquid not bound to the laundry can be determined particularly advantageously by detecting the volume of the washing liquid thrown free. After the washing liquid has been pumped around, the washing drum is rotated and the washing liquid not bound to the laundry is thrown free, which collects in the tub, the volume detection device, in particular the level sensor, advantageously detecting the respective volume of the washing liquid thrown free can. In particular, the volume of the washing liquid thrown free corresponds to the volume of the washing liquid not bound to the laundry.

In an advantageous embodiment of the laundry care device, the volume detection device comprises a fill level sensor arranged in the tub, in particular in a lower region of the tub facing the drain opening, for detecting a fill level of the washing liquid in the tub.

This achieves the technical advantage that the volume of the washing liquid, in particular the washing liquid thrown out, can be determined directly in the tub by means of a filling level sensor, in particular a pressure sensor, arranged in the tub for detecting a filling level of the washing liquid in the tub.

In an advantageous embodiment of the laundry care device, the control is designed to determine a ratio between the amount of washing liquid supplied to the tub and the volume of the washing liquid thrown free during the period of time, the textile detection device being designed to detect a type of textile of the laundry on the basis of the determined ratio, and / or wherein the volume reference value is determined as a function of the determined ratio, as a function of the detected textile type and / or as a function of the detected weight of the laundry.

This has the technical advantage that the respective ratio between the amount of washing liquid supplied and the volume of the washing liquid thrown free enables a more precise detection of the textile type of the laundry or the volume reference value than if only the volume of the washing liquid thrown free is compared with the volume reference value.

According to a second aspect, the object of the invention is achieved by a method for caring for laundry in a laundry care device, the laundry care device having a tub for receiving washing liquid, the tub having a drain opening and an inlet opening which are fluidically connected by a liquid line, the laundry care device having a laundry drum for receiving laundry, a washing liquid supply device for supplying washing liquid into the tub, a pump which is designed to pump washing liquid through the drain opening into the liquid line and the pumped out washing liquid through the inlet opening again to the tub in order to wet the laundry in the laundry drum, a volume detection device for detecting a volume of washing liquid not bound by the laundry, a textile detection device for detecting a textile type of the laundry received in the laundry drum and / or a weight detection device for detecting a weight of the in laundry received on the laundry drum, and a controller for controlling the pump and the washing liquid supply device, the method comprising the following steps, determining a r the amount of washing liquid to be supplied to the tub by the washing liquid supply device on the basis of a detected textile type of the laundry and / or on the basis of a detected weight of the laundry by the controller, activating the washing liquid supply device by the controller during a period of time in order to supply the determined amount of washing liquid to the tub the pump by the controller during the time segment in order to pump the supplied washing liquid through the liquid line, detecting a volume of the washing liquid not bound to the laundry by the volume detection device, deactivating the washing liquid supply device by the control after the time segment when the detected volume exceeds a volume reference value, wherein the volume reference value is determined as a function of the detected type of textile and / or the detected weight of the laundry.

This has the technical advantage that an advantageous degree of saturation of the laundry for caring purposes can be achieved with washing liquid.

In an advantageous embodiment of the method, if the recorded volume falls below the volume reference value, the control system repeats the time interval in order to determine an amount of washing liquid again, to supply the determined amount of washing liquid to the tub again, and to record a volume of the washing liquid not bound to the laundry again , and the Deactivate washing liquid supply device when the sum of the volume and the newly detected volume exceeds the volume reference value.

This has the technical advantage that the control can repeat the time segment until the sum of the recorded volumes exceeds the volume reference value, so that an approximation of the advantageous saturation of the laundry can be achieved as part of an iterative process.

In an advantageous embodiment of the method, the detection of the volume of the washing liquid not bound to the laundry includes the detection of the volume of washing liquid pumped around by the pump through the liquid line by the volume detection device.

This achieves the technical advantage that by detecting the volume of the pumped washing liquid, the volume of the washing liquid not bound to the laundry can be detected particularly advantageously.

In an advantageous embodiment of the method, the laundry care device has a drum drive for rotating the laundry drum, and the method comprises the following steps: activating the drum drive by the control after the washing liquid has been pumped through the liquid line during the period of time in order to spin free washing liquid bound to the laundry and to obtain an amount of washing liquid thrown free, detecting a volume of the washing liquid thrown free by the volume detecting means to detect the volume of the washing liquid not bound to the laundry.

This achieves the technical advantage that by detecting the volume of the washing liquid thrown free, the volume of the washing liquid not bound to the laundry can be detected particularly advantageously.

Embodiments of the invention are shown in the drawings and are described in more detail below.

Fig. 1

eine schematische Ansicht eines Wäschepflegegeräts;

Fig. 2

eine schematische Ansicht eines Wäschepflegegeräts mit einer Steuerung;

Fig. 3

eine graphische Darstellung eines Wäschepflegevorgangs gemäß einer Ausführungsform;

Fig. 4

eine graphische Darstellung eines Erfassungsvorgangs eines elektrischen Leistungswerts einer Pumpe eines Wäschepflegevorgangs; und

Fig. 5

eine schematische Darstellung eines Verfahrens zum Pflegen von Wäsche in einem Wäschepflegegerät.

Show it:

Fig. 1

a schematic view of a laundry care device;

Fig. 2

a schematic view of a laundry care device with a controller;

Fig. 3

a graphic representation of a laundry care process according to an embodiment;

Fig. 4

a graph showing a detection process of an electric power value of a pump of a laundry care process; and

Fig. 5

a schematic representation of a method for caring for laundry in a laundry care device.

Fig. 1 FIG. 11 shows a schematic view of a general laundry care device 100, such as a washing machine. The laundry care device 100 comprises a rinsing bowl 101 into which detergent or other liquid substances can be filled. The laundry care device 100 comprises a door 103 for loading the laundry care device 100 with laundry.

Fig. 2 shows a schematic view of a laundry care device with a control. The laundry care device 100 has a tub 105 for receiving washing liquid, and has a laundry drum 107 for receiving laundry. The laundry drum 107 has an underside 109 of the drum. The tub 105 has a drain opening 111. The laundry care device 100 has an inlet opening 113. The discharge opening 111 is fluidically connected to the inlet opening 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 can dispense washing liquid through the drain opening 111 from the tub 105 during an in Fig. 2 Pump the pumping over process (not shown) into the liquid line 115 and feed the pumped out washing liquid through the liquid line 115 and through the inlet opening 113 to the tub 105 and the laundry drum 107. As a result, the fresh washing liquid can effectively through the liquid line 115 during a laundry care process are pumped around and fed to the laundry in the laundry drum 107 again.

The laundry care device 100 further comprises a controller 119 which is connected to the pump 117 by a first control connection 121 and which is connected to a drum drive 123 for rotating the laundry drum 107 by a second control connection 125.

The controller 119 is also connected by a third control connection 127 to a washing liquid supply device 129 for supplying washing liquid into the tub 105, the washing liquid supply device 129 being connected to the tub 105 by a supply line 131.

The controller 119 is furthermore connected by a fourth control connection 133 to a volume detection device 135 for detecting a volume of the washing liquid not bound to the laundry.

The volume acquisition device 135 can in particular, as in FIG Fig. 2 shown, comprise a flow sensor arranged in the liquid line 115 for detecting a volume flow of the washing liquid pumped through the liquid line 115.

The volume detection device 135 can in particular comprise a fill level sensor arranged in the tub 105, in particular in a lower region of the tub 105 facing the drain opening 111, for detecting a fill level of the washing liquid in the tub 105.

The volume acquisition device 135 can in particular comprise a power acquisition element for acquiring an electrical power value of the pump 117. In this case, the line gripping element is arranged in particular in the pump 115, or the line gripping element is connected to the pump 117.

The laundry care device 100 further comprises a weight detection device 137 for detecting a weight of the laundry received in the laundry drum 107, which is connected to the controller 119 by a fifth control connection 139.

The weight detection device 137 comprises, in particular, a weighing device for weighing a weight of the laundry received in the laundry drum 107, a device for detecting a lowering of a vibrating system of the laundry drum 107 and / or a device for detecting performance parameters of the drum drive 123 of the laundry drum 107.

The laundry care device 100 further comprises a textile detection device 141 for detecting a textile type of the laundry received in the laundry drum 107, which is connected to the controller 119 by a sixth control connection 143.

The textile detection device 141 comprises in particular an optical sensor for detecting material properties of a textile type of the laundry, the textile detection device 141 being designed to detect a textile type of the laundry on the basis of the detected material properties.

The textile detection device 141 is designed, in particular, to detect a textile type of laundry on the basis of a selected laundry care program, with the laundry care device 100 in this case being an in Fig. 2 has program selection device (not shown) for selecting a laundry care program from a plurality of laundry care programs.

The laundry care device 100 further comprises an outlet line 128 which is fluidically connected to the liquid line 115. The pump 117 is formed during an in Fig. 2 The pumping process, not shown, is used to pump out washing liquid through the drain opening 111 from the tub 105, through the liquid line 115 and through the outlet line 128 from the laundry care device 100.

Fig. 3 shows a graphic representation of a laundry care process according to a first embodiment.

The representation (a) of the Fig. 3 shows the relationship between the saturation of the laundry, which is plotted along the ordinate axis 145, as a function of a weight of the laundry detected by a weight detection device 137, which is plotted along the abscissa axis 147, for various types of textile.

The in illustration (a) of the Fig. 3 The first curve 149 shown shows the linear dependency between a saturation of the first type of textile and the weight of the first type of textile that is present for a first type of textile, in particular terry.

The in illustration (a) of the Fig. 3 The second curve 151 shown shows the linear dependency between saturation of the second type of textile and the weight of the second type of textile that is present for a second type of textile, in particular polyester.

The in illustration (a) of the Fig. 3 The third curve 153 shown shows the dependency between saturation and weight of the laundry stored for a laundry care program selected by a user.

If the controller 119 knows the specific weight of the laundry detected by the weight detection device 137, and the controller knows the specific textile type of laundry detected by the textile detection device 141, the controller 119 can use a reference comparison to determine an amount assigned to the specific textile type and the specific weight Determine washing liquid which is supplied to the tub 105 by the washing liquid supply device 129.

Here, the textile detection device 141 can in particular determine the textile type as a function of the laundry care program selected by the user, or the textile detection device 141 can detect the textile type by means of an optical sensor.

The representations (b), (c) and (d) of Fig. 3 FIG. 13 shows chronological representations of a washing liquid quantity supplied by the washing liquid supply device 129 (see illustration a), a speed of rotation of the rotating laundry drum 107 (see illustration b), and a volume of washing liquid not bound to the laundry (see FIG Representation c), all of which are plotted along the respective ordinate axis 145 as a function of the time which is indicated along the respective abscissa axis 147.

The in illustration (b) of the Fig. 3 The fourth curve 155 shown shows the time course of the amount 157 of washing liquid supplied by the washing liquid supply device 129 to a tub 105 during a time segment 159, the washing liquid amount 157 being determined by the controller 119 according to illustration (a).

The in illustration (c) of the Fig. 3 The fifth curve 156 shown shows the time profile of the rotational speed of the laundry drum 107 driven by the drum drive 123.

The in illustration (c) of the Fig. 3 The sixth curve 158 shown shows the time profile of the volume of the washing liquid not bound to the laundry detected by the volume detection device 135 during the time segment 159.

During a first time interval 159-1 of the time segment 159, washing liquid is supplied to the tub 105 and the washing liquid supplied is supplied to the laundry by pumping over by means of the pump 117 in order to wet the washing with the washing liquid.

After the pumping over during the first time interval 159-1, a volume 161-1 of the washing liquid not bound to the laundry is detected by the volume detection device 135 during a subsequent second time interval 159-2 of the time segment 159.

In this case, the pump 117 can in particular be activated again in order to assess whether there is washing liquid not yet bound to the laundry, which washing liquid can be determined by the volume detection element 135. The controller 119 is designed in particular to deactivate the pump 117 during the time segment 159 in order to stop the pumping of the washing liquid through the liquid line 115 when the recorded volume 161-1 falls below a minimum volume value.

During an optional third time interval 159-3 of the time segment 159 following the second time interval 159-2, the rotational speed of the laundry drum 107 is increased.

During a fourth time interval 159-4 of the time segment 159 following the third time interval 159-3, the rotational speed of the laundry drum 107 is increased in order to spin free washing liquid bound to the laundry and to obtain a freely spun-free amount of washing liquid. The volume detection device 135 is designed to detect a volume 161-2 of the washing liquid thrown free.

During a fifth time interval 159-5 of the time segment 159 following the fourth time interval 159-3, the pump 117 is activated again in order to recirculate the washing liquid that has been thrown out to wet the laundry advantageously with the washing liquid that has been thrown out.

The controller 119 compares the detected volume 161-2 of the washing liquid thrown free with an in Fig. 3 Volume reference value 163, not shown, and deactivates the washing liquid supply device 129 if the detected volume 161-2 of the washing liquid thrown free exceeds the volume reference value 163. This makes it possible to ensure that the laundry is advantageously saturated with washing liquid.

The volume reference value 163 is here determined as a function of the type of textile detected by the textile detection device 141 and / or the weight of the laundry detected by the weight detection device 137.

If the detected volume 161-2 falls below the volume reference value 163, the controller 119 repeats the time segment 159 in order to again determine a washing liquid amount 157, to supply the determined washing liquid amount 157 to the tub 105 again, again a volume 161-2 of the volume not bound to the laundry Detect washing liquid, and deactivate the washing liquid supply device 129 if the sum of the volume 161-2 and the newly detected volume 161-2 exceeds the volume reference value 163.

Thus, washing liquid can be gradually added to the laundry to ensure effective saturation of the laundry with washing liquid.

Here, the volume detection element 135 comprises in particular a fill level sensor arranged in the tub 105, in particular in a lower region of the tub 105 facing the drain opening 111, for detecting a fill level of the washing liquid in the tub 105.

Even if in the in the Fig. 3 illustrated embodiment, the volume 161-2 of the washing liquid thrown free is detected as the volume 161-2 of the washing liquid not bound to the laundry by the volume detection device 135, it is alternatively possible that the volume 161-1 of the by the pump 117 through the liquid line 115 transferred washing liquid is detected as the volume 161-2 of the washing liquid not bound to the laundry by the volume detection device 135.

In this case, the volume detection device 135 comprises in particular a flow sensor arranged in the liquid line 115 for detecting a volume flow of the washing liquid pumped through the liquid line 115, and / or the volume detection device 135 comprises a power detection element for detecting an electrical power value of the pump 117.

In this way, a targeted saturation of the laundry is set and under- or oversaturation of the laundry with the washing liquid can be prevented. Only the amount of washing liquid that is required for an advantageous laundry care cycle is supplied to the laundry. An optimal washing liquid consumption and energy consumption of the laundry care device 100 can thus be ensured.

In addition, a particularly advantageous laundry care result is ensured through optimal saturation of the laundry.

Fig. 4 Fig. 13 is a graph showing a detection process of an electric power value of a pump of a laundry care process.

According to the present disclosure, the volume detection device 135 for detecting a volume 161-1, 161-2 of washing liquid not bound to the laundry may comprise a power detection element for detecting an electric power value of the pump 117.

Since the pump 117 pumps washing liquid with a volume flow through the liquid line 115 as a function of an electrical power value of the pump 117 during a pumping process, there is a correlation between the electrical power value of the pump 117 and the volume flow. The volume flow can be determined from the detected electrical power value of the pump 117. Given a known time, the determined volume flow can be converted into a volume 161-1 of the washing liquid that is circulated by the pump 117.

Fig. 4 FIG. 8 shows the course of the electrical power value of the pump 117, in particular electrical current, plotted along the ordinate axis 145 as a function of time, which is plotted along the abscissa axis 147. As can be seen from the first and second power curves 165, 167, the electrical power value drops when the pump 117 no longer delivers washing liquid.

As can be seen from the first power curve 165, when determining the first integral value 169 based on the first power curve 165, power peaks occurring after the electrical power value has dropped for the first time are no longer taken into account.

As can be seen from the second power curve 167, when determining the second integral value 171 based on the second power curve 167 after the electrical power value has dropped for the first time, additional power peaks are also taken into account, so that the second integral value 171 is above the first integral value 169.

The corresponding volume 161-1, 161-2 of the washing liquid not bound to the laundry can thus be detected by the selected first or second integral value 169, 171, depending on the requirement by the controller 119.

Fig. 5 shows a schematic representation of a method for caring for laundry in a laundry care device.

The method 200 comprises, as a first method step, the determination 201 of a quantity 157 of washing liquid to be supplied to the tub 105 by the washing liquid supply device 129 on the basis of a detected textile type of the laundry and / or on the basis of a detected weight of the laundry by the controller 119.

The method 200 comprises, as a second method step, the activation 203 of the washing liquid supply device 129 by the controller 119 during a time segment 159 in order to supply the determined washing liquid quantity 157 to the tub 105.

The method 200 comprises, as a third method step, the activation 205 of the pump 117 by the controller 119 during the time segment 159 in order to pump the supplied washing liquid through the liquid line 115.

The method 200 includes, as an optional fourth method step, the activation 207 of the drum drive 123 by the controller 119 after the washing liquid has been pumped through the liquid line 115 during the time segment 159, in order to free the washing liquid bound to the laundry and to obtain a free amount of washing liquid.

The method 200 comprises, as a fifth method step, the detection 209 of a volume 161-1, 161-2 of the washing liquid not bound to the laundry by the volume detection device 135.

The method 200 comprises, as a sixth method step, the deactivation 211 of the washing liquid supply device 129 by the controller 119 after the time segment 159 when the recorded volume 161-1, 161-2 has a volume reference value 163 exceeds, wherein the volume reference value 163 is determined as a function of the detected type of textile and / or the detected weight of the laundry.

All 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.

The scope of protection of the present invention is given by the claims and is not restricted by the features explained in the description or shown in the figures.

List of reference symbols

100

Laundry care device

101

Detergent bowl

103

door

105

Suds container

107

Laundry drum

109

Drum bottom

111

Drain hole

113

Inlet opening

115

Liquid line

117

pump

119

control

121

First control connection

123

Drum drive

125

Second control connection

127

Third tax connection

128

Outlet pipe

129

Washing liquid supply device

131

Feed line

133

Fourth control link

135

Volume acquisition device

137

Weight detection device

139

Fifth tax link

141

Textile detection device

143

Sixth control link

145

Ordinate axis

147

Abscissa axis

149

First turn

151

Second corner

153

Third corner

155

Fourth turn

156

Fifth turn

157

Amount of washing liquid

158

Sixth turn

159

Time period

159-1

First time interval

159-2

Second time interval

159-3

Third time interval

159-4

Fourth time interval

159-5

Fifth time interval

161-1

Volume of the washing liquid not bound to the laundry

161-2

Volume of the washing liquid thrown out

163

Volume reference value

165

First performance curve

167

Second performance curve

169

First integral value

171

Second integral value

200

Method of caring for laundry

201

First process step: determining the amount of washing liquid

203

Second process step: activating the washing liquid supply device

205

Third process step: activate the pump

207

Optional fourth process step: activating the drum drive

209

Fifth procedural step: recording a volume

211

Sixth process step: deactivating the washing liquid supply device

Claims (15)

Laundry care device (100) with a tub (105) for receiving washing liquid, the tub (105) having a drain opening (111) and an inlet opening (113), which are fluidically connected by a liquid line (115), a laundry drum (107) for receiving laundry, a washing liquid supply device (129) for supplying washing liquid into the tub (105), a pump (117) which is designed to pump washing liquid through the drain opening (111) into the liquid line (115) and through the pumped washing liquid feed the inlet opening (113) to the tub (105) again in order to wet the laundry in the laundry drum (107), a volume detection device (135) for detecting a volume (161-1, 161-2) of washing liquid not bound to the laundry , and a controller (119) for controlling the pump (117) and the washing liquid supply device (129), wherein the laundry care device (100) a A textile detection device (141) for detecting a type of textile of the laundry received in the laundry drum (107) and / or a weight detection device (137) for detecting a weight of the laundry received in the laundry drum (107), characterized in that
the controller (119) is designed to determine an amount (157) of washing liquid to be supplied to the tub (105) by the washing liquid supply device (129) on the basis of a detected textile type of the laundry and / or on the basis of a detected weight of the laundry that
the controller (119) is designed to activate the washing liquid supply device (129) during a period of time (159) and to supply the determined amount of washing liquid (157) to the tub (105) that
the controller (119) is designed to activate the pump (117) during the time segment (159) in order to pump the supplied washing liquid through the liquid line (115), the volume detection device (135) being designed to generate a volume (161-1, 161-2) to detect the washing liquid not bound to the laundry, and that
the controller (119) is designed to deactivate the washing liquid supply device (129) when the detected volume (161-1, 161-2) exceeds a volume reference value (163), the volume reference value (163) depending on the detected textile type and / or the recorded weight of the laundry is determined. Laundry care device (100) according to claim 1, characterized in that the controller (119) is designed to repeat the time segment (159) again when the recorded volume (161-1, 161-2) falls below the volume reference value (163) to determine an amount of washing liquid (157), to supply the determined amount of washing liquid (157) to the tub (105) again, to again detect a volume (161-1, 161-2) of the washing liquid not bound to the laundry, and the washing liquid supply device (129) to be deactivated if the sum of the volume (161-1, 161-2) and the newly acquired volume (161-1, 161-2) exceeds the volume reference value (163). Laundry care device (100) according to Claim 2, characterized in that the control (119) is designed to re-determine the washing liquid quantity (157) as a function of the difference between the volume reference value (163) and the volume (161) recorded during the time segment (159). 1, 161-2), and / or that the controller (119) is designed to determine the again determined washing liquid amount (157) on the basis of the detected textile type of the laundry and / or on the basis of the detected weight of the laundry. Laundry care device (100) according to one of the preceding claims, characterized in that the weight detection device (137) comprises a weighing device for weighing a weight of the laundry received in the laundry drum (107), a device for detecting a lowering of an oscillating system of the laundry drum (107) and / or a device for detecting performance parameters of the drum drive (123) of the laundry drum (107). Laundry care device (100) according to one of the preceding claims, characterized in that the laundry care device (100) has a program selection device for selecting a laundry care program from a plurality of laundry care programs, the textile detection device (141) is designed to detect a textile type of laundry on the basis of the selected laundry care program. Laundry care device (100) according to one of the preceding claims, characterized in that the textile detection device (141) comprises an optical sensor for detecting material properties of a textile type of laundry, the textile detection device (141) being designed to assign a textile type to the laundry on the basis of the detected material properties capture. Laundry care device (100) according to one of the preceding claims, characterized in that the volume detection device (135) is designed to have a volume (161-1) of the washing liquid pumped through the liquid line (115) by the pump (117) during the time segment (159) to detect in order to detect the volume (161-1) of the washing liquid not bound to the laundry. Laundry care device (100) according to one of the preceding claims, characterized in that the volume detection device (135) comprises a flow sensor arranged in the liquid line (115) for detecting a volume flow of the washing liquid pumped through the liquid line (115), and / or that the volume detection device ( 135) comprises a power detection element for detecting an electric power value of the pump (117). Laundry care device (100) according to one of the preceding claims, characterized in that the laundry care device (100) has a drum drive (123) for rotating the laundry drum (107), and that the control (119) is designed after the washing liquid has been pumped through Liquid line (115) to activate the drum drive (123) in order to spin free washing liquid bound to the laundry in order to obtain a spun-free amount of washing liquid, the volume detection device (135) being designed to add a volume (161-2) of the washing liquid being thrown free and pumped around detect to detect the volume (161-2) of the washing liquid not bound to the laundry. Laundry care device (100) according to one of the preceding claims, characterized in that the volume detection device (135) has a fill level sensor arranged in the tub (105), in particular in a lower area of the tub (105) facing the drain opening (111), for detecting a fill level the washing liquid located in the tub (105). Laundry care device (100) according to claim 9 or 10, characterized in that the control (119) is designed to provide a ratio between the amount of washing liquid (157) supplied to the tub (105) and the volume (161-2) during the time segment (159) of the washing liquid thrown free, the textile detection device (141) being designed to detect a textile type of the laundry on the basis of the determined ratio, and / or the volume reference value (163) depending on the determined ratio, depending on the detected textile type and / or in Dependence of the detected weight of the laundry is determined. A method (200) for caring for laundry in a laundry care device (100), the laundry care device (100) having a tub (105) for receiving washing liquid, the tub (105) having a drain opening (111) and an inlet opening (113) which are fluidically connected by a liquid line (115), the laundry care device (100) having a laundry drum (107) for receiving laundry, a washing liquid supply device (129) for supplying washing liquid into the tub (105), a pump (117), which is designed to pump washing liquid through the drain opening (111) into the liquid line (115) and to feed the pumped washing liquid back to the tub (105) through the inlet opening (113) in order to wet the laundry in the laundry drum (107), a volume measuring device (135) for detecting a volume (161-1, 161-2) of washing liquid not bound by the laundry, a textile detection A device (141) for detecting a type of textile of the laundry received in the laundry drum (107) and / or a weight detection device (137) for detecting a weight of the laundry received in the laundry drum (107), and a controller (119) for controlling the pump ( 117) and the washing liquid supply device (129), characterized in that the method (200) comprises the following steps,
Determining (201) an amount (157) of washing liquid to be supplied to the tub (105) by the washing liquid supply device (129) on the basis of a detected textile type of the laundry and / or on the basis of a detected weight of the laundry by the controller (119),
Activation (203) of the washing liquid supply device (129) by the control (119) during a time segment (159) in order to supply the determined amount of washing liquid (157) to the tub (105),
Activation (205) of the pump (117) by the controller (119) during the time segment (159) in order to pump the supplied washing liquid through the liquid line (115),
Detection (209) of a volume (161-1, 161-2) of the washing liquid not bound to the laundry by the volume detection device (135),
Deactivation (211) of the washing liquid supply device (129) by the controller (119) after the time segment (159) when the detected volume (161-1, 161-2) exceeds a volume reference value (163), the volume reference value (163) as a function of the detected textile type and / or the detected weight of the laundry is determined. The method (200) according to claim 12, characterized in that when the recorded volume (161-1, 161-2) falls below the volume reference value (163), the time segment (159) is repeated by the controller (119) to again Determine washing liquid amount (157), again supply the determined washing liquid amount (157) to the tub (105), again detecting a volume (161-1, 161-2) of the washing liquid not bound to the laundry, and adding the washing liquid supply device (129) deactivate if the sum of the volume (161-1, 161-2) and the newly acquired volume (161-1, 161-2) exceeds the volume reference value (163). The method (200) according to claim 12 or 13, characterized in that the recording (209) of the volume (161-1, 161-2) of the washing liquid not bound to the laundry is the recording of the volume (161-1, 161-2) of washing liquid circulated by the pump (117) through the liquid line (115) through the volume detection device (135). Method (200) according to claim 12 or 13, characterized in that the laundry care device (100) has a drum drive (123) for rotating the laundry drum (107), that the method (200) comprises the following steps,
Activation (207) of the drum drive (123) by the controller (119) after the washing liquid has been pumped around through the liquid line (115) during the period of time (159) in order to free the washing liquid bound to the laundry and to obtain a free amount of washing liquid,
Detecting (209) a volume (161-2) of the washing liquid thrown free by the volume detection device (135) in order to detect the volume (161-2) of the washing liquid not bound to the laundry.

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