WO2018108493A1

WO2018108493A1 - Laundry-care appliance having a controller

Info

Publication number: WO2018108493A1
Application number: PCT/EP2017/080411
Authority: WO
Inventors: Yi-chun SHI
Original assignee: BSH Hausgeräte GmbH
Priority date: 2016-12-15
Filing date: 2017-11-24
Publication date: 2018-06-21
Also published as: EP3555356A1; CN110073046A; DE102016225146B3; CN110073046B; PL3555356T3; EP3555356B1

Abstract

The present invention relates to a laundry-care appliance (100) having: an outer tub (105) for accommodating a washing liquid, the outer tub (105) containing a pressure-sensing device which is designed to sense the pressure of the washing liquid in the outer tub (105), the outer tub (105) also containing an inner tub (107) for accommodating laundry; a tub drive (111) for rotating the inner tub (107); a washing liquid supply device (137) for supplying washing liquid to the outer tub (105); a pump (119) for pumping washing liquid out of the outer tub (105); and a controller (129) for controlling the tub drive (111), the washing liquid supply device (137) and the pump (119). The controller (129) is designed, during a first period (153), to activate the washing liquid supply device (137) to supply washing liquid to the outer tub (105) and to activate the tub drive (111) to rotate the inner tub (107) at a first rotation speed and to wet washing in the inner tub (107) with the supplied washing liquid. The controller (129) is designed to activate the pump (119) at the end of the first period (153) to pump the washing liquid out of the outer tub (105) and out of the laundry-care appliance (100) when the pressure sensed for the washing liquid in the outer tub (105) remains constant during a sensing period (159). The controller (129) is designed, during a second period (155) following the first period (153), to deactivate the pump (119) and the washing liquid supply device (137) and to activate the tub drive (111) to rotate the inner tub (107) at a second rotation speed and to wet the laundry in the inner tub (107) with washing liquid held in the laundry.

Description

Laundry care device with a controller

The present invention relates to a laundry care device with a controller. In order to ensure an advantageous laundry care process, washing liquid is supplied to a lye container of the laundry care appliance in a conventional laundry care appliance. During the laundry care process, a laundry drum of the laundry care appliance is rotated by a drum drive at a rotational speed to ensure advantageous wetting of the laundry in the laundry drum. Since the washing liquid in the tub for the rotary laundry drum provides increased resistance, the drum drive must exert an increased force to rotate the laundry drum filled with laundry, thereby increasing the overall energy consumption of the laundry machine.

In DE 34 01 899 A1 discloses a washing machine with a pump for conveying liquor in a water outlet and in a Spülwasserablauf is disclosed.

DE 10 2014 207 742 A1 discloses a method for operating a washing machine, the method comprising adding treatment liquor to laundry items in a laundry drum.

It is the object underlying the invention to provide a laundry care device in which an advantageous and energy-efficient laundry care process can be performed.

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

According to one aspect, the object of the invention by a laundry care device with a tub for receiving washing liquid, wherein in the Laugenbehälter a pressure detecting device is arranged, which is adapted to detect the pressure of the washing liquid in the tub, wherein in the tub a washing drum for receiving laundry is arranged, a drum drive for rotating the laundry drum, a

A washing liquid supply means for supplying washing liquid into the tub, a pump for pumping washing liquid from the tub and a controller for controlling the drum drive, the washing liquid supply means and the pump, wherein the controller is adapted to activate the washing liquid supply means for washing liquid for a first time period into the tub, and to activate the drum drive to rotate the laundry drum at a first rotational speed and to wet laundry in the laundry drum with the supplied washing liquid, the controller being adapted to activate the pump at the end of the first period To pump washing liquid from the tub and from the laundry care device, when the detected pressure of the washing liquid in the tub during a detection period remains constant, and wherein the Steuerun g is configured to deactivate the pump and the Waschflüssigkeitszuführeinrichtung during a second period following the first period, as well as to activate the drum drive to rotate the laundry drum at a second rotational speed and to wet the laundry in the laundry drum with washing liquid received in the laundry ,

As a result, the technical advantage is achieved that an advantageous laundry care of the laundry in the laundry drum is ensured by the laundry care process during the first and second time periods. Since the pump and the washing liquid supply device are deactivated during the second time period, the energy consumption of the laundry care device can be significantly reduced.

During a laundry care process, after a certain time, a balance is achieved between a laundry care concentration in the laundry and a laundry care concentration outside the laundry in the laundry drum. This equilibrium can be recognized by the fact that the pressure of the washing liquid detected in the tub by the pressure detecting device no longer falls off, but remains constant. Since the laundry in the equilibrium state has the same laundry care concentration as the supplied washing liquid, it is not absolutely necessary to supply further washing liquid to the washing liquor after reaching the equilibrium state. After reaching the equilibrium state, at the end of the first period, the free, not bound to the laundry, washing liquid can be pumped out by the pump. Since thus the amount of washing liquid was reduced in the tub, the drum drive must rotate during the second period, the laundry drum filled with laundry only by a reduced, bound in the laundry, amount of washing liquid. As a result, the energy consumption of the laundry care device can be significantly reduced and, moreover, overheating of the motor of the drum drive can be avoided. Furthermore, due to the reduced amount of washing liquid in the tub during the second time period, the laundry in the rotating laundry drum can be turned over particularly advantageously. The cleaning efficiency of the laundry care process is not reduced here.

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

In an advantageous embodiment of the laundry care device, the controller is configured to activate the pump at the end of the first period of time to pump the washing liquid out of the tub and out of the laundry care appliance if a detection mean value of the detected pressure values during the detection period is equal to a mean value of the detected pressure values during a comparison period corresponds, wherein the detection period is followed by the comparison period.

As a result, the technical advantage is achieved that the controller can determine particularly advantageous when the detected pressure of the washing liquid in the tub remains constant. The pressure detection device detects a plurality of pressure values during the comparison time period and the subsequent detection time period. In this case, the controller determines a comparison mean value from the multiplicity of pressure values detected during the comparison time segment. The controller further determines a detection average value from the plurality of pressure values detected during the acquisition time period. The controller now compares the detection mean value with the comparison mean value. If the detection mean value corresponds to the comparison mean value, the controller can advantageously determine that the detected pressure of the washing liquid in the tub remains constant. In another embodiment, the controller may advantageously determine that the sensed pressure of the wash liquid in the tub remains constant when the detection mean value is within a tolerance range of the comparison mean value. Subsequently, at the end of the first period, the controller can activate the pump to pump washing liquid out of the tub.

In a further advantageous embodiment of the laundry care device, the controller is configured to activate the pump at the end of the first period of time to pump the washing liquid out of the tub and out of the laundry machine if the detected pressure of the washing liquid in the tub during the detection period does not exceed an upper threshold pressure exceeds and does not fall below a lower pressure threshold.

Thereby, the technical advantage is achieved that the controller can determine particularly advantageous when the detected pressure of the washing liquid in the tub remains constant. The upper pressure threshold and the lower pressure threshold deviate only to a small extent, so that it is ensured that detected pressure values, which are located between the upper and lower pressure threshold, also deviate only to a small extent from each other, so that the controller has a constant Can capture pressure during the acquisition period. In a further embodiment, the controller itself may be designed to determine the upper pressure threshold value and the lower pressure threshold value in the context of a reference laundry care run, or the two pressure threshold values may be specified when setting up the laundry care appliance. In a further advantageous embodiment of the laundry care appliance, the laundry care appliance comprises a program selection device for selecting a laundry care program of the laundry care appliance, wherein the controller is designed to determine the duration of the detection time period and the comparison time period, and / or the upper and lower pressure threshold values, depending on the selected laundry care program.

Thereby, the technical advantage is achieved that a particularly accurate determination of the duration of the detection time period and the comparison time period, or the respective pressure threshold value is made possible. Since the time duration of the detection period and the comparison time period, or the respective pressure threshold values may depend on various parameters, e.g. Laundry type, amount of laundry, degree of contamination of the laundry, and the like, can be provided by the selection of a specific laundry maintenance program of the controller further information that allow the controller, the time duration of the respective periods, or the respective pressure thresholds, particularly advantageous to determine.

In a further advantageous embodiment of the laundry care device, the first rotational speed and the second rotational speed are identical, and in particular have a value between 40 U / min and 60 U / min.

Thereby, the technical advantage is achieved that an identical first and second rotational speed ensures a simplification of the transition between the first and second time period, since the controller can operate the drum drive in both time periods with an identical rotational speed. A first and second rotational speed between 40 U / min and 60 U / min, in particular of 50 U / min, is particularly advantageous here. A first and second rotational speed between 40 rpm and 60 rpm may also be advantageous in another embodiment if the first and second rotational speeds differ.

In a further advantageous embodiment of the laundry care device, the controller is designed to deactivate the pump during the second time period, when the detected pressure of the washing liquid in the tub below a Mindestaldruckschwellenwert.

This achieves the technical advantage of ensuring that the pump does not run dry and is therefore not damaged. The minimum pressure threshold is chosen to be high enough to ensure timely deactivation of the pump from dry running.

In a further advantageous embodiment of the laundry care device, the controller is designed to terminate the second time period after reaching a maximum time duration, wherein the controller is in particular designed to determine the maximum time duration of the second time interval as a function of the second rotational speed.

As a result, the technical advantage is achieved that the termination of the second period of time after expiration of the maximum period of time ensures that the laundry care substance in the laundry is not washed out of the laundry, and thus a sufficient laundry care effect can be ensured.

In a further advantageous embodiment of the laundry care appliance, the laundry care appliance comprises a program selection device for selecting a laundry care program of the laundry care appliance, wherein the controller is designed to determine the maximum time duration of the second time segment as a function of the selected laundry care program.

As a result, the technical advantage is achieved that the maximum time duration of the second time period can be determined in such an advantageous manner as a function of the selected laundry care program that the time duration of the second time period can be optimized with regard to a particularly advantageous laundry care success.

In a further advantageous embodiment of the laundry care appliance, the washing liquid supply means comprises a feed line and a feed valve, wherein the feed valve is designed to fluidly lock the feed line in a first valve position, and to fluidically release the feed line in a second valve setting to wash liquid through the feed line to the tub wherein the controller is configured to transfer the feed valve to the second valve position during the first time period to pass wash fluid through the supply line into the tub and wherein the controller is configured to move the feed valve to the first valve position during the second time period transfer to lock the supply fluidly.

Thereby, the technical advantage is achieved that the control ensures a particularly advantageous control of the amount of supplied washing liquid by controlling the supply valve of the washing liquid supply. In a further advantageous embodiment of the laundry care apparatus, the controller is configured to activate the washing liquid supply means during a second period subsequent to the second time period to supply washing liquid to the tub, and to activate the drum drive to rotate the laundry drum at a third rotation speed.

As a result, the technical advantage is achieved that after the end of the second period of time by activating the washing liquid supply device, a particularly effective rinsing of the laundry in the laundry drum is ensured. In one embodiment, the third rotation speed may be greater than the second rotation speed during the second time period to ensure effective rinsing of the laundry.

In a further advantageous embodiment of the laundry care device, the controller is designed to activate the pump during the third time period in order to pump washing liquid out of the tub.

As a result, the technical advantage is achieved that after the end of the second period by the activation of the pump during the rinsing process, an effective rinsing of Wäschepflegesubstanz from the laundry.

In a further advantageous embodiment of the laundry care appliance, the laundry care appliance has a heating device for heating the washing liquid in the tub, and the controller is designed to heat the heating device during the washing Activate first and / or second time period to heat the washing liquid in the tub.

As a result, the technical advantage is achieved that a particularly effective dissolution of the Wäschepflegesubstanz is achieved by heating the washing liquid and also the effectiveness of the laundry care process can be increased.

In a further advantageous embodiment of the laundry care appliance, the tub comprises a drain opening and an inlet nozzle, wherein the drain opening is connected to the inlet nozzle by a fluid-carrying line, wherein the pump is arranged in the line, and is designed to pump washing liquid out of the tub through the drain opening and to pump the pumped washing liquid back through the line and through the inlet nozzle into the laundry drum located in the tub, wherein the controller is configured to activate the pump during a pumping operation during the first period to remove the supplied washing liquid through the discharge opening from the To pump the tub and re-supply the tub through the inlet nozzle to rewet the laundry in the laundry drum with washing liquid, the controller is formed, at the end of the first period, the pump currency end of an Abpumpvorgangs to pump the washing liquid from the tub and from the laundry care device when the detected pressure of the washing liquid in the tub during a detection period remains constant.

Thereby, the technical advantage is achieved that a corresponding control is possible during a pumping operation in a laundry care device with a pumping system. During the first time period, the controller may activate the pump during a pump-over operation to pump over the supplied wash fluid and re-supply the pumped wash fluid to the laundry in the laundry drum. At the end of the first period, during a pump down operation, the pump pumps the wash liquid out of the tub and out of the pumping system when the sensed pressure remains constant.

According to a second aspect of the invention, the object is achieved by a method for the care of laundry in a laundry care device, wherein the laundry care device a tub for holding washing liquid, wherein in the tub a pressure detecting means is arranged, which is adapted to detect the pressure of the washing liquid in the tub, wherein in the tub a laundry drum for receiving laundry is arranged, a drum drive for rotating the laundry drum, a washing liquid supply means for supplying washing liquid into the tub, a pump for pumping washing liquid from the tub and a controller for controlling the drum drive, the washing liquid supply means and the pump, the method comprising the steps of activating the washing liquid supply means to introduce washing liquid into the washing liquid To supply tub and the drum drive to rotate the laundry drum at a first rotational speed, by the controller during a first period of time to the laundry in the Wäsc To wet drum with the supplied washing liquid, activating the pump by the controller at the end of the first period to pump the washing liquid from the tub and from the laundry care device, if the detected pressure of the washing liquid in the tub during a detection period remains constant, deactivating the pump and the washing liquid supply means by the controller during a second period following the first period, and activating the drum driver during the second period to rotate the laundry drum at a second rotational speed and to wet the laundry with washing liquid received in the laundry.

As a result, the technical advantage is achieved that the method ensures a particularly efficient and energy-saving laundry care in the laundry care appliance.

In an advantageous embodiment of the method, the method further comprises the step of activating the scrubbing liquid supply means and the drum drive during a third time period following the second time period to supply scrubbing liquid to the scrubber and rotating the scrubbing drum at a third rotation speed.

As a result, the technical advantage is achieved that an effective rinsing of the laundry is ensured during the third period. Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Show it:

Fig. 1 is a schematic view of a laundry care device;

2 shows a schematic view of a pumping system of a laundry care device with a pump;

3 is a graphical representation of a laundry care operation in a laundry care appliance according to an embodiment; and

Fig. 4 is a schematic representation of a method for maintaining laundry in a laundry care device.

Fig. 1 shows a schematic view of a general laundry care device 100, such as e.g. a washing machine. The laundry care device 100 comprises an induction bowl 101, into which detergent or other liquid substances can be introduced. The laundry care appliance 100 comprises a door 103 for loading the laundry care appliance 100 with laundry.

Fig. 2 shows a schematic view of a pumping system of a laundry care device with a pumping device. The laundry care apparatus 100 has a tub 105 for receiving washing liquid, and has a laundry drum 107 for receiving laundry. The laundry drum 107 has a drum base 109 and is driven by a drum drive 1 1 1 by means of a drive connection 1 13. The tub 105 has a drain opening 1 15, which is connected to a fluid-carrying line 1 17. In line 1 17, a pump 1 19 is arranged for pumping washing liquid, which is designed during a Abpumpvorgangs scrubbing liquid through the discharge port 1 15, through a first line section 121 of the line 1 17 and through a pumping line 123 from the laundry care device 100. So that the pump 1 19 can also perform a pumping function, the pump 1 19 is fluidly connected by a second line section 125 of the line 1 17 with an inlet nozzle 127 of the tub 105. During a Umpumpvorgangs the pump can pump 1 19 washing liquid through the discharge port 15 1 from the tub 105 in the first line section 121 of the line 1 17 and the pumped washing liquid through the second line section 125 of the line 1 17 and through the inlet nozzle 127 to the tub 105 and the laundry drum 107 arranged therein re-supply. As a result, the fresh washing liquid can effectively be pumped through the line 1 17 during a laundry care process and fed back to the laundry in the laundry drum 107. As a result, the laundry care success during a laundry care process can be improved.

The pump 1 19 can be used in a laundry care apparatus 100 according to the invention with a pumping system according to FIG. 2. Alternatively, the pump 1 19 can be used in a laundry care apparatus 100 according to the invention without pumping system, in which case the second line section 125 and the inlet nozzle 127 is not present, and the pump 1 19 during a pumping operation, the washing liquid through the discharge opening 15 1, through the first line section 121 and pumped through the pumping line 123 from the laundry care device 100.

The laundry care device 100 further comprises a controller 129, which is connected to the pump 1 19 by a first control connection 131, and which is connected to the drum drive 1 1 1 by a second control connection 133 to the pump 1 19 and the drum drive 1 1 1 head for. The controller 129 is further connected through a third control connection 135 to a washing liquid supply means 137 for supplying washing liquid through a supply line 139 into the tub 105. The controller 129 is configured to control the supply of washing liquid into the tub 105 by the washing liquid supply means 137. 3 shows a graphical representation of a laundry care process in a laundry care appliance according to an embodiment. Fig. 3 shows a time chart of the level of washing liquid in the tub 105, the water pressure of the washing liquid in the tub 105, the water temperature of the washing liquid in the tub 105, and the rotational speed of the laundry drum 107, all of which are plotted along the ordinate axis 141 as a function of time, which is indicated along the abscissa axis 143.

The first curve 145 shows the course of the level of washing liquid in the tub 105. The second curve 147 shows the course of the rotational speed of the laundry drum 107. The third curve 149 shows the course of the washing liquid pressure of the washing liquid in the tub 105. The fourth curve 151 shows the course of the water temperature of the washing liquid in the tub 105. The washing process shown in Fig. 3 has a first period of time 153, an adjoining second period 155, and a subsequent thereto third time period 157 on.

At the beginning of the first period of time 153, the controller 129 activates the scrubbing liquid supply means 137 to supply scrubbing liquid into the scrubber tank 105, whereby, as shown in the first curve 145, the level of scrubbing liquid in the scrubber tank 105 increases. As shown in the fourth curve 151, the washing liquid temperature rises by activation of a heating element by the controller 129 at the beginning of the first period 153. Further, the controller 129 activates the drum drive 1 1 1 to rotate the laundry drum 107 at a first rotational speed during the first period 153, as represented by the second curve 147, the first rotational speed being in particular between 40 rpm and 60 rpm / min, in particular 50 U / min, has. By the supplied washing liquid can be ensured that the laundry in the laundry drum 107 is completely wetted during the first period 153. During the first period 153, a balance between the concentration of the washing liquid in the laundry and outside the laundry, whereby the washing liquid pressure of the washing liquid in the tub 105 decreases, until the washing liquid pressure at the end of the first period 153 has a constant value, as by the third curve 149 is shown. In order to effectively determine the end of the first period of time 153, the controller 129 determines whether the sensed pressure of the wash liquid in the tub 105 remains constant during a detection period 159.

For this purpose, the controller 129 may compare a detection mean value of the pressure values acquired during the detection time section 159 with a comparison mean value of the pressure values detected during a comparison time section 161. Here, the comparison period 161 is earlier in time than the detection period 159, and both time periods 159, 161 may have the same time duration in particular. Alternatively or additionally, the controller 129 may determine whether the sensed pressure of the scrubbing liquid in the tub 105 remains constant during the detection period 159 when the sensed pressure during the detection period 159 does not exceed an upper pressure threshold and does not fall below a lower pressure threshold.

In this case, the controller 129 can in particular determine the duration of the acquisition time section 159, the comparison time section 161, or the upper and lower pressure threshold values as a function of a selected laundry care program of the laundry care device 100.

Once the controller 129 determines that the sensed pressure of the scrubbing liquid in the tub 105 remains constant during the detection period 159, the controller 129 activates the pump 1 19 to pump scrubbing liquid from the tub 105 and the laundry care apparatus 100. This is illustrated in FIG. 3 at the end of the first time interval 153, since, as shown in the third curve 149, the detected pressure of the washing liquid drops sharply.

Subsequently, the controller 129 deactivates the pump 1 19 and the washing liquid supply means 137 at the beginning of the second time period 155, which adjoins the first time period 153. By pumping the free, not bound to the laundry, washing liquid, and disabling the supply of washing liquid is the laundry care device 100 during the adjoining the first period of time 153 second period 155 only the Washing liquid available, which is bound in the laundry. In the household used laundry care equipment 100 come out with the bound in the laundry washing liquid to achieve a good laundry care success.

In this case, during the second time interval 155, the controller 129 activates the drum drive 11 1, which rotates the laundry drum 107 at a second rotational speed, as represented by the second curve 147, the second rotational speed corresponding in particular to the first rotational speed, and in particular a value between 40 RPM and 60 RPM, especially 50 RPM.

The controller 129 terminates the second period 155 when a maximum period of time has been reached, wherein the controller 129 may determine the maximum period of time, in particular, depending on the second rotational speed and / or depending on the type of user-selected laundry maintenance program.

The second time period 155 is followed by a third time interval 157 during which a rinsing process is carried out. At the beginning of the third period of time 157, the controller 129 again activates the scrubbing liquid supply means 137, whereby scrubbing liquid is supplied to the scrubber 105 and both the level and the pressure of the scrubbing liquid in the scrubber 105 increase, as represented by the first curve 145 and third curve 149. At the beginning of the third time period 157, the controller 129 may further activate the drum drive 1 1 1, so that the laundry drum 107 is operated at a third rotational speed, which may be greater than the second rotational speed, in order to ensure effective spin of the laundry in the laundry drum 107 as shown by the second curve 147.

The third time period 157 may be followed by a fourth time period 163 and a fifth time interval 165, during which the rinses of the third time interval 157 are repeated, or a final spinning of the laundry is ensured. By deactivating the pump 1 19 and the washing liquid supply device 137 during the second time period 155, the power consumption of the laundry care device 100 can be significantly reduced. In addition, overheating of the motor of the drum drive 1 1 1 can be avoided, since the engine has to spend a smaller force to rotate the laundry drum 107. Because there is no free washing liquid in the tub 105 during the second time period 155, a particularly advantageous turning of the laundry in the laundry drum 107 can be ensured during rotation of the laundry drum 107.

4 shows a schematic illustration of a method 200 for maintaining laundry in a laundry care device 100, which is described in accordance with the embodiments of FIGS. 2 and 3.

The method 200 includes activating 201 the washing liquid supply means 137 to supply washing liquid into the tub 105, and the drum drive 11 to rotate the washing drum 107 at a first rotation speed by the controller 129 during a first time period 153, around the laundry in the laundry drum 107 to wet with the supplied washing liquid.

The method 200 includes activating 203 the pump 1 19 by the controller 129 at the end of the first time period 153 to pump the wash liquid from the tub 105 and the laundry care device 100 when the detected pressure of the wash liquid in the tub 105 during a detection time period 159 remains constant. The method 200 comprises deactivating 205 the pump 1 19 and the washing liquid supply means 137 by the controller 129 during a second time period 155 following the first time period 153 and activating 207 the drum drive 11 1 during the second time period 155, with the laundry drum 107 Rotate a second rotational speed and wet the laundry with recorded in the laundry washing liquid.

The method 200 further includes the following optional step, activating 209 the scrubbing liquid supply device 137 and the drum drive 1 1 1 during a the third time period 157 following the second time period 155 to supply washing liquid to the tub 105, and to rotate the laundry drum 107 at a third rotation speed.

All features explained and shown in connection with individual embodiments of the invention may be provided in different combinations in the article according to the invention, in order to simultaneously realize their advantageous effects.

The scope of the present invention is given by the claims and is not limited by the features illustrated in the specification or shown in the figures.

LIST OF REFERENCE NUMBERS

100 laundry care device

101 induction bowl

103 door

105 tubs

107 laundry drum

109 drum base

1 1 1 Drum drive

1 13 Drive connection

1 15 drain opening

1 17 line

1 19 pump

121 First line section of the line

123 pumping line

125 Second line section of the line

127 inlet nozzle

129 control

131 First control connection

133 Second control connection

135 Third tax connection

137 washing liquid supply device

139 feed line

141 ordinate axis

143 abscissa axis

145 First turn

147 Second turn

149 Third turn

151 Fourth bend

153 First period

155 Second Period

157 Third Period

159 acquisition period

161 Comparative period 163 Fourth Period

165 fifth period

200 A method for maintaining laundry in a laundry care device

201 Activation of the washing liquid supply device and the drum drive

203 Activating the pump

205 Deactivating the pump and the washer fluid feeder

207 Activating the drum drive

209 Activating the Wash Fluid Dispenser and Drum Drive

Claims

A laundry care device (100) having a lye container (105) for receiving washing liquid, wherein in the lye container (105) a pressure detection device is arranged, which is designed to detect the pressure of the washing liquid in the lye container (105), wherein in the tub (105 ) a laundry drum (107) is arranged for receiving laundry, a drum drive (1 1 1) for rotating the laundry drum (107), a Waschflüssigkeitszuführeinrichtung (137) for supplying washing liquid into the tub (105), a pump (1 19) for pumping washing liquid from the tub (105) and a controller (129) for controlling the drum drive (1 1 1), the Waschflüssigkeitszuführeinrichtung (137) and the pump (1 19), characterized in that

the controller (129) is configured to activate the scrubbing liquid supply device (137) during a first time period (153) in order to supply scrubbing liquid to the scrubber (105) and to activate the drum drive (1 1 1) to move the scrubbing drum (107) to rotate at a first rotational speed and to wet laundry in the laundry drum (107) with the supplied washing liquid, that

the controller (129) is designed to activate the pump (1 19) at the end of the first time period (153) in order to pump the washing liquid out of the tub (105) and out of the laundry care appliance (100) if the detected pressure of the washing liquid in the tub (105) remains constant during a detection period (159), and that

the controller (129) is designed to deactivate the pump (1 19) and the washing liquid supply device (137) during a second time section (155) following the first time section (153) and to activate the drum drive (1 1 1) to rotate the laundry drum (107) at a second rotational speed and to wet the laundry in the laundry drum (107) with washing liquid received in the laundry. The laundry care appliance (100) according to claim 1, characterized in that the controller (129) is adapted to activate the pump (1 19) at the end of the first period (153) to remove the washing liquid from the tub (105) and from the laundry care appliance (100) when a detection average of the detected pressure values during the detection period (159) corresponds to a comparison average of the detected pressure values during a comparison period (161), the detection period (159) being subsequent to the comparison period (161).

The laundry care apparatus (100) according to claim 1 or 2, characterized in that the controller (129) is adapted to activate the pump (1 19) at the end of the first period (153) to remove the washing liquid from the tub (105) and from the scrubber (100), when the detected pressure of the scrubbing liquid in the tub (105) during the detection period (159) does not exceed an upper threshold pressure and does not fall below a lower threshold pressure.

The laundry care apparatus (100) according to claim 2 or 3, characterized in that the laundry care apparatus (100) comprises program selection means for selecting a laundry care program of the laundry care apparatus (100), wherein the controller (129) is configured to set the duration of the detection period (159) and the Comparison period (161), or the upper and lower pressure threshold, depending on the selected laundry care program to determine.

Laundry care appliance (100) according to one of the preceding claims, characterized in that the first rotational speed and the second rotational speed are identical, in particular have a value between 40 U / min and 60 U / min.

The laundry care appliance (100) according to one of the preceding claims, characterized in that the controller (129) is designed to deactivate the pump (1 19) during the second time period (155) when the detected pressure of the Washing liquid in the tub (105) falls below a Mindestaldruckschwellenwert.

Laundry care appliance (100) according to one of the preceding claims, characterized in that the controller (129) is adapted to terminate the second time period (155) after reaching a maximum time duration, wherein the controller (129) is in particular formed, the maximum time period of the second time period (155) depending on the second rotation speed.

The laundry care device (100) according to claim 7, characterized in that the laundry care device (100) comprises a program selection device for selecting a laundry care program of the laundry care device (100), wherein the controller (129) is designed to set the maximum time duration of the second time section (155) in dependence on selected laundry care program.

The laundry care appliance (100) according to one of the preceding claims, characterized in that the washing liquid supply device (137) has a feed line (139) and a feed valve, wherein the feed valve is designed to fluidly block the feed line (139) in a first valve position, and a second valve setting fluidly release the supply line (139) to the washing liquid through the supply line (139) to the tub (105), wherein the controller (129) is formed, during the first period (153) to convert the supply valve in the second valve position to direct scrubbing liquid through the supply line (139) into the tub (105), and wherein the controller (129) is adapted to transfer the supply valve to the first valve position during the second time period (155) to remove the supply line (139). fluidly to lock.

The laundry care appliance (100) according to any one of the preceding claims, characterized in that the controller (129) is adapted to activate the washing liquid supply means (137) during a third time period (157) subsequent to the second time period (155) to deliver washing liquid to the washing tub (105) and to activate the drum drive (1 1 1) to rotate the laundry drum (107) at a third rotational speed.

1 1. The laundry care appliance (100) according to claim 10, characterized in that the controller (129) is designed to activate the pump (1 19) during the third time period (157) in order to pump washing liquid out of the tub (105).

12. The laundry care device (100) according to any one of the preceding claims, characterized in that the laundry care device (100) has a heating device for heating the washing liquid in the tub (105), and that the controller (129) is formed, the heating device during the first or second period (153, 155) to heat the scrubbing liquid in the tub (105).

13. The laundry care appliance (100) according to one of the preceding claims, characterized in that the suds container (105) comprises a discharge opening (15) and an inlet nozzle (127), wherein the discharge opening (15) communicates with the inlet nozzle (127) through a fluid-carrying line (1 17) is connected, wherein the pump (1 19) in the conduit (1 17) is arranged, and is adapted to pump washing liquid through the discharge port (1 15) from the tub (105), and the pumped washing liquid through the line (1 17) and through the inlet nozzle (127) to pump back into the laundry drum (107) arranged in the tub (105),

wherein the controller (129) is adapted, during the first period (153) to activate the pump (1 19) during a pumping operation to pump the supplied washing liquid through the discharge opening (1 15) from the tub (105) and the tub ( 105) through the inlet nozzle (127) to re-wet the laundry in the laundry drum (107) with washing liquid,

wherein the controller (129) is arranged, at the end of the first period (153), to activate the pump (1 19) during a pump down operation to pump out the wash liquid from the tub (105) and from the laundry care appliance (100) when detected Pressure of the washing liquid in the tub (105) remains constant during a detection period (159). Method (200) for the care of laundry in a laundry care device (100), wherein the laundry care device (100) comprises a suds container (105) for receiving washing liquid, wherein in the suds container (105) a pressure detecting device is arranged, which is designed to reduce the pressure of Detecting washing liquid in the tub (105), wherein in the tub (105) a laundry drum (107) for receiving laundry is arranged, a drum drive (1 1 1) for rotating the laundry drum (107), a Waschflüssigkeitszuführeinrichtung (137) Supplying washing liquid into the tub (105), a pump (1 19) for pumping washing liquid from the tub (105) and a controller (129) for controlling the drum drive (1 1 1), the washing liquid supply means (137) and the pump (1 19), characterized in that the method (200) comprises the following steps:

Activating (201) the washing liquid supply means (137) to supply washing liquid into the tub (105) and the drum drive (1 1 1) to rotate the laundry drum (107) at a first rotation speed by the controller (129) during a first period of time (153) to wet the laundry in the laundry drum (107) with the supplied washing liquid,

Activating (203) the pump (1 19) by the controller (129) at the end of the first period (153) to pump the washing liquid from the tub (105) and the laundry care appliance (100) when the detected pressure of the washing liquid in the tub (105) remains constant during a detection period (159),

Deactivating (205) the pump (1 19) and the washing liquid supply means (137) by the controller (129) during a second time period (155) following the first time period (153), and

Activating (207) the drum drive (1 1 1) during the second time period (155) to rotate the laundry drum (107) at a second rotational speed and to wet the laundry with wash liquid received in the laundry.

The method (200) of claim 14, characterized in that the method (200) further comprises the following step,

Activating (209) the scrubbing liquid supply means (137) and the

Drum drive (1 1 1) during a second period (155) following third time period (157) to wash liquid the tub

(105) and rotate the laundry drum (107) at a third rotational speed.