DE102019207240A1 - Laundry care device with one control - Google Patents

Abstract

The present invention relates to a 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 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 not washing liquid bound to the laundry, and a control (119) for controlling the pump (117) and the washing liquid supply device (129), wherein the laundry care device (100) has a textile detection device (141) for detecting a textile type 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, 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 The controller (119) is designed to activate the washing liquid supply device (129) during a time segment (159) and to supply the specific amount of washing liquid (157) to the tub (105) that the controller (119) is designed to during the time segment (159) to activate the pump (117) in order to transfer the supplied washing liquid through the liquid line (115 ), the volume detection device (135) being designed to detect a volume (161-1, 161-2) of the washing liquid not bound to the laundry, and in that the controller (119) is designed to deactivate the washing liquid supply device (129) when the recorded volume (161-1, 161-2) exceeds a volume reference value (163), the volume reference value (163) being determined as a function of the detected type of textile 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 which is designed to pump out washing liquid through the drain opening into the liquid line and to feed the pumped out washing liquid again through the inlet opening to the tub in order to wet the laundry in the washing drum, a volume detection device for detecting a volume of the Laundry bound washing liquid, and a control for controlling the pump and the washing liquid supply device released, the laundry care device having 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 controller being designed to supply an amount of washing liquid to the tub by the washing liquid supply device on the basis of a detected textile type of the laundry and / or To determine the basis of a detected weight of the laundry, the controller being designed to activate the washing liquid supply device during a period of time, and to supply the determined amount of washing liquid to the tub, the controller being designed to activate the pump during the period of time in order to carry out the supplied washing liquid pumping around the liquid line, wherein the volume detection device is designed to detect a volume of the washing liquid not bound to the laundry, and wherein the control is designed to the washing liquid supply device caution to deactivate if the recorded volume exceeds a volume reference value, the volume reference value being determined as a function of the recorded type of textile and / or the recorded 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 only have one textile detection device, only one Have weight detection device or a textile detection device and a 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 supplied amount of washing liquid 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 close the pump during the time segment deactivate in order to stop the pumping of the washing liquid through the liquid line if a volume flow value determined as a function of the recorded volume falls below a volume flow minimum 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 by detecting the volume of the washing liquid thrown free, the volume of the washing liquid not bound to the laundry can be determined particularly advantageously. After the washing liquid has been pumped around, the washing drum is rotated and the washing liquid that is not bound to the laundry is thrown free, which collects in the tub, whereby the volume detection device, in particular the level sensor, can advantageously detect the respective volume of the washing liquid thrown free. 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, wherein The laundry care device has 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 out washing liquid through the drain opening into the liquid line and to feed the pumped out washing liquid through the inlet opening to the tub again to put the laundry in to wet 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 type of textile in de r laundry and / or a weight detection device for detecting a weight of the laundry received in the laundry drum, and a controller for controlling the pump and the washing liquid supply device, the method comprising the following steps of determining an 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 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, activating the pump by the controller during the period of time to transfer the supplied washing liquid through the liquid line pumping over, 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 period of time when the recorded volume exceeds a volume reference value, the volume reference value being determined as a function of the recorded textile type and / or the recorded 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 to deactivate the washing liquid supply device if 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.

• 1 eine schematische Ansicht eines Wäschepflegegeräts;
• 2 eine schematische Ansicht eines Wäschepflegegeräts mit einer Steuerung;
• 3 eine graphische Darstellung eines Wäschepflegevorgangs gemäß einer Ausführungsform;
• 4 eine graphische Darstellung eines Erfassungsvorgangs eines elektrischen Leistungswerts einer Pumpe eines Wäschepflegevorgangs; und
• 5 eine schematische Darstellung eines Verfahrens zum Pflegen von Wäsche in einem Wäschepflegegerät.

Show it:

• 1 a schematic view of a laundry care device;
• 2 a schematic view of a laundry care device with a controller;
• 3 a graphic representation of a laundry care process according to an embodiment;
• 4th a graph showing a detection process of an electric power value of a pump of a laundry care process; and
• 5 a schematic representation of a method for caring for laundry in a laundry care device.

1 Figure 12 shows a schematic view of a general laundry care appliance 100 such as a washing machine. The laundry care device 100 includes a bowl 101 which can be filled with detergent or other liquid substances. The laundry care device 100 includes a door 103 for loading the laundry care device 100 with laundry.

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 to pick up laundry. The laundry drum 107 has a drum bottom 109 on. The suds container 105 has a drain port 111 on. The laundry care device 100 has an inlet port 113 on. The drain hole 111 is through a liquid line 115 with the inlet port 113 fluidly connected, in the liquid line 115 a pump 117 for pumping washing liquid through the liquid line 115 is arranged. The pump 117 can wash liquid through the drain hole 111 from the tub 105 during an in 2 pumping process, not shown, into the liquid line 115 and the pumped out washing liquid through the liquid line 115 and through the inlet port 113 the suds container 105 and the laundry drum 107 feed again. As a result, the fresh washing liquid can effectively through the liquid line during a laundry care process 115 be pumped around and the laundry in the washing drum 107 be fed again.

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

The control 119 is also through a third control connection 127 with a washing liquid supply device 129 for feeding washing liquid into the tub 105 connected, wherein the washing liquid supply device 129 through a feed line 131 with the suds container 105 connected is.

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

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

The volume acquisition device 135 can in particular one in the tub 105 , especially in one of the drainage ports 111 facing lower area of the tub 105 , arranged fill level sensor for detecting a fill level in the tub 105 include located washing liquid.

The volume acquisition device 135 can especially be a
Power detection element for detecting an electrical power value of the pump 117 include. Here, the line gripping element is in particular in the pump 115 arranged, or the line gripping element is with the pump 117 connected.

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

The weight detection device 137 in particular comprises a weighing device for weighing a weight in the laundry drum 107 recorded laundry, 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 the laundry drum 107 .

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

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 is designed to detect a textile type of laundry on the basis of the detected material properties.

The textile detection device 141 is designed in particular to detect a type of textile of the laundry on the basis of a selected laundry care program, the laundry care device in this case 100 one in 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 conduit 128 , which with the liquid line 115 is fluidly connected. The pump 117 is trained during an in 2 Not shown pumping 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 to pump out.

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

The representation (a) of the 3 shows the relationship between saturation of laundry, which is taken along the ordinate axis 145 is plotted, depending on a by a weight detection device 137 recorded weight of the laundry, which is along the abscissa axis 147 is requested for different types of textiles.

The in illustration (a) of the 3 shown first curve 149 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 3 second curve shown 151 shows the linear dependency between the saturation of the second type of textile and the weight of the second type of textile that exists for a second type of textile, in particular polyester.

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

Is the controller 119 that by the weight detection device 137 detected specific weight of the laundry is known and is controlled by the textile detection device 141 detected specific textile type of laundry known, the controller can 119 by means of a reference comparison, determine an amount of washing liquid assigned to the specific textile type and the specific weight, which the tub 105 through the washing liquid supply device 129 is fed.

The textile detection device 141 in particular, the textile type can be determined as a function of the laundry care program selected by the user, or the textile detection device can 141 detect the type of textile using an optical sensor.

The representations (b), (c) and (d) of 3 show temporal representations of a through the washing liquid supply device 129 supplied amount of washing liquid (see illustration a), a speed of the rotating laundry drum 107 (see illustration b), and a volume of washing liquid not bound to the laundry (see illustration c), all along the respective ordinate axis 145 as a function of time, which is along the respective abscissa axis 147 is indicated, are plotted.

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

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

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

During a first time interval 159-1 of the time period 159 washing liquid is added to the tub 105 supplied and the supplied washing liquid is the laundry by pumping by means of the pump 117 supplied to wet the laundry with the washing liquid.

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

Here the pump 117 in particular are activated again in order to assess whether washing liquid which has not yet been bound to the laundry is present which has passed through the volume detection element 135 can be determined. The control 119 is designed here in particular, the pump 117 during the period 159 to deactivate in order to pump the washing liquid through the liquid line 115 finish when the captured volume 161-1 falls below a minimum volume value.

During one of the second time intervals 159-2 subsequent optional third time interval 159-3 of the time period 159 becomes the speed of the laundry drum 107 elevated.

During one of the third time interval 159-3 subsequent fourth time interval 159-4 of the time period 159 becomes the speed of the laundry drum 107 increased in order to spin free washing liquid bound to the laundry and to obtain a free spun amount of washing liquid. The volume acquisition device 135 is formed a volume 161-2 to capture the thrown washing liquid.

During one of the fourth time interval 159-3 subsequent fifth time interval 159-5 of the time period 159 becomes the pump 117 activated again in order to recirculate the washing liquid which has been thrown free to wet the laundry advantageously with the washing liquid which has been thrown free.

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

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

If the captured volume 161-2 the volume reference value 163 the controller repeats 119 the time period 159 to select an amount of washing liquid again 157 to determine again the determined amount of washing liquid 157 the suds container 105 add a volume again 161-2 to detect the washing liquid not bound to the laundry, and the washing liquid supply device 129 to disable when the sum of the volume 161-2 and the re-acquired volume 161-2 the volume reference value 163 exceeds.

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

Here, the volume acquisition element comprises 135 especially one in the tub 105 , especially in one of the drainage ports 111 facing lower area of the tub 105 , arranged fill level sensor for detecting a fill level in the tub 105 located washing liquid.

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

In this case, the volume acquisition device comprises 135 especially one in the liquid line 115 arranged flow sensor for detecting a volume flow through the liquid line 115 comprises pumped washing liquid, and / or comprises the volume acquisition device 135 a power detecting element for detecting an electric 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 appliance can thus be achieved 100 be ensured.

In addition, the optimal saturation of the laundry ensures a particularly advantageous laundry care result.

4th 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 acquisition device 135 for capturing a volume 161-1 , 161-2 of washing liquid not bound to the laundry, a power detection element for detecting an electric power value of the pump 117 include.

Because the pump 117 washing liquid with a volume flow through the liquid line during a pumping over process 115 depending on an electrical power value of the pump 117 pumps, there is a correlation between the electrical power value of the pump 117 and the volume flow. From the recorded electrical power value of the pump 117 the volume flow can be determined. At a known time, the determined volume flow can be in a through the pump 117 pumped volume 161-1 the washing liquid can be converted.

4th shows the along the ordinate axis 145 Plotted curve of the electrical power value of the pump 117 , in particular electric current, as a function of time, which is along the abscissa axis 147 is offered. Like from the first and second performance curve 165 , 167 is apparent, the electrical power value decreases when through the pump 117 washing liquid is no longer conveyed.

Like from the first performance curve 165 will be apparent when determining the on the first performance curve 165 based first integral value 169 power peaks occurring after the first drop in the electrical power value are no longer taken into account.

Like from the second performance curve 167 will be apparent when determining the on the second performance curve 167 based second integral value 171 additional power peaks occurring after the electrical power value has dropped for the first time also taken into account, so that the second integral value 171 above the first integral value 169 lies.

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

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

The procedure 200 comprises determining as the first process step 201 one of the tub 105 through the washing liquid supply device 129 amount to be fed 157 of washing liquid based on a detected textile type of the laundry and / or on the basis of a detected weight of the laundry by the controller 119 .

The procedure 200 comprises activation as the second process step 203 the washing liquid supply device 129 through the controller 119 during a period of time 159 to select the specific amount of washing liquid 157 the suds container 105 feed.

The procedure 200 comprises activation as the third process step 205 the pump 117 through the controller 119 during the period 159 to divert the supplied washing liquid through the liquid line 115 to pump over.

The procedure 200 comprises activation as an optional fourth method step 207 of the drum drive 123 through the controller 119 after pumping the washing liquid through the liquid line 115 during the period 159 to free the washing liquid bound to the laundry and to obtain a free amount of washing liquid.

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

The procedure 200 comprises deactivation as the sixth method step 211 the washing liquid supply device 129 through the controller 119 according to the time period 159 when the captured volume 161-1 , 161-2 a volume reference value 163 exceeds the volume reference value 163 is determined as a function of the detected textile type 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

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102016212490 A1 [0003]
• EP 2348151 A1 [0004]

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 Textile detection device (141) for detecting a textile type 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 is 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 control (119) is designed, to activate the washing liquid supply device (129) during a time segment (159) and to supply the specific amount of washing liquid (157) to the tub (105) so 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), wherein the volume detection u ngseinrichtung (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) when 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 type of textile and / or the detected weight of the laundry. Laundry care device (100) according to Claim 1 , characterized in that the controller (119) is designed, if the recorded volume (161-1, 161-2) falls below the volume reference value (163), to repeat the time segment (159) in order to again determine an amount of washing liquid (157) to again supply the determined amount of washing liquid (157) to the tub (105), again to detect a volume (161-1, 161-2) of the washing liquid not bound to the laundry, and to deactivate the washing liquid supply device (129) when the sum is out the volume (161-1, 161-2) and the re-acquired volume (161-1, 161-2) exceeds the volume reference value (163). Laundry care device (100) according to Claim 2 , characterized in that the controller (119) is designed to add the newly determined amount of washing liquid (157) as a function of the difference between the volume reference value (163) and the volume (161-1, 161-2) recorded during the time segment (159) determine, and / or that the controller (119) is designed to determine the again determined amount of washing liquid (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) being designed to assign a textile type to the laundry on the basis of the selected laundry care program capture. 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 the volume (161-1) of the to capture 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 controller (119) is designed to determine a ratio between the amount of washing liquid (157) supplied to the tub (105) and the volume (161-2) of the washing liquid thrown free, during the time segment (159), the textile detection device (141) is designed to detect a type of textile of the laundry on the basis of the determined ratio, and / or the volume reference value (163) being 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. 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 controller (119) during a period (159) in order to increase the determined amount of washing liquid (157) to supply the tub (105), activation (205) of the pump (117) by the controller (119) during the time segment (159), u m 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 recorded 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 detected weight the laundry is intended. 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) in order to again determine a washing liquid quantity (157), again to supply the certain amount of washing liquid (157) to the tub (105), again a volume (161-1, 161-2) that is not bound to the laundry Detect washing liquid, and deactivate the washing liquid supply device (129) if the sum of the volume (161-1, 161-2) and the newly detected volume (161-1, 161-2) exceeds the volume reference value (163). Method (200) according to Claim 12 or 13 , characterized in that the detection (209) of the volume (161-1, 161-2) of the washing liquid not bound to the laundry is the detection of the volume (161-1, 161-2) by the pump (117) by the Liquid line (115) of pumped washing liquid 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, activating (207) the drum drive (123) by the control (119) after the washing liquid has been pumped through the liquid line (115) during the time segment (159) in order to free-throw washing liquid bound to the laundry and obtain a free-throwing amount of washing liquid, detecting (209) a volume (161-2) of the washing liquid thrown free by the Volume detection device (135) to detect the volume (161-2) of the washing liquid not bound to the laundry.

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