CN109072528B

CN109072528B - Laundry care appliance with control device

Info

Publication number: CN109072528B
Application number: CN201780022800.5A
Authority: CN
Inventors: G·奇热夫斯基; K·雷德林
Original assignee: BSH Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2016-04-12
Filing date: 2017-03-10
Publication date: 2021-05-25
Anticipated expiration: 2037-03-10
Also published as: CN109072528A; EP3443156A1; EP3443156B1; PL3443156T3; WO2017178162A1; DE102016206047A1

Abstract

The invention relates to a laundry care appliance (100) having a lye container (105) for receiving washing liquid, a washing drum (107) for receiving the washing liquid, a drum drive (111) for rotating the washing drum (107), and a control device (123), wherein the lye container (105) comprises an outlet opening (115) and an inlet opening (117), wherein the outlet opening (115) is fluidically connected to the inlet opening (117) via a line (119), wherein a lye pump (121) for pumping washing liquid is arranged in the line (119), and the control device is used for controlling the drum drive (111) and the lye pump (121). The control device (123) is designed to activate the lye pump (121) during the circulating pumping process in order to pump washing liquid from the lye container (105) through the discharge opening (115) into the line (119) and to re-convey the pumped washing liquid through the line (119) and through the inlet opening (117) into the lye container (105). The control device (123) is designed to activate the drum drive (111) during the cyclical pumping process in order to rotate the washing drum (107) during a rotation period and to bring the laundry into contact with the washing drum (107).

Description

Laundry care appliance with control device

Technical Field

The invention relates to a laundry care appliance with a control device.

Background

In laundry care appliances having a circulation pump system, the washing liquid is pumped out of the lye container by means of the lye pump and the pumped-out washing liquid is conveyed back to the lye container by means of the lye pump via the circulation pump system in order to moisten the laundry in the washing drum with the washing liquid again. Laundry that is not saturated with water tends to float on the washing liquid in the washing drum, and therefore the floating laundry cannot be moved sufficiently by the rotating drum. This may prevent the laundry which is not saturated with water and floats on the washing liquor from being adequately washed during the laundry care process.

Disclosure of Invention

The object of the present invention is to provide a laundry care appliance, in which an effective laundry care process is achieved for all the laundry.

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

According to one aspect, the object is achieved according to the invention by a laundry care appliance having a lye container for receiving washing liquid, a washing drum for receiving the washing liquid, a drum drive for rotating the washing drum, and a control device, wherein the lye container comprises an outlet opening and an inlet opening, wherein the outlet opening is fluidically connected to the inlet opening by a line, wherein a lye pump for pumping washing liquid is arranged in the line, wherein the control device is used for controlling the drum drive and the lye pump, wherein the control device is designed for activating the lye pump during a circulating pumping process in order to pump washing liquid from the lye container into the line via the outlet opening and to re-convey the pumped washing liquid via the line and via the inlet opening to the lye container, wherein the control device is designed for activating the drum drive during the circulating pumping process, so as to rotate the washing drum during the rotation period and to bring the laundry into contact with the washing drum.

The technical advantage achieved thereby is that by rotating the washing drum during the circulating pumping process, the laundry portion which is not saturated with water and is therefore floating is also brought into contact with the washing drum. This results in advantageous wetting, wetting through and improved cleaning of the laundry parts which are not impregnated with water, for example laundry made of wool or silk.

When the lye pump is activated by the control device, the washing liquid is pumped out of the lye container into the pipeline at the beginning of the circulating pumping process, so that the liquid level of the washing liquid in the lye container drops. The laundry portion that is not saturated with water and is therefore floating is also brought into contact with the washing drum with the level of the washing liquid in the lye container dropping and is then moved by the rotating washing drum during the rotation period. Here, the rotation time period may comprise any time period of the cyclical pumping process, wherein the rotation time period may alternatively comprise the entire duration of the cyclical pumping process. The laundry in contact with the rotating washing drum can thus be wetted uniformly from all sides.

The washing liquid pumped out by the lye pump into the line is pumped back into the lye container through the inlet opening during the circulation pump in order to convey the pumped-out washing liquid back to the laundry in the washing drum. In this case, the newly supplied washing liquid can wet the laundry parts in contact with the rotating washing drum particularly effectively, since it can advantageously wet the laundry parts that are actively moving through the rotating washing drum from different sides. This results in improved partial wetting of the laundry and in improved washing results as a result of the improved partial wetting of the laundry.

The combination of the recirculating pumping process with the contact of the laundry portions on the washing drum during the rotation of the washing drum thus advantageously serves for a non-damaging and effective laundry care of sensitive and less wettable laundry portions, for example made of wool or silk.

A laundry care appliance is understood to be an appliance for laundry care, for example a washing machine or a drying machine. The laundry care appliance is understood to be, in particular, a household laundry care appliance. That is, the laundry care appliance is used in the domestic field and treats the usual amount of laundry in the domestic field.

In an advantageous embodiment of the laundry care appliance, the laundry care appliance has a rinsing shell for supplying the washing liquid, wherein the rinsing shell is fluidically connected to the lye container via the supply line, wherein the control device is designed to activate the rinsing shell in order to transfer the washing liquid from the rinsing shell to the lye container via the supply line.

The technical advantage achieved thereby is that an efficient transfer of the washing liquid from the rinsing housing into the rinsing housing is achieved by the rinsing housing being fluidically connected to the lye container.

In a further advantageous embodiment of the laundry care appliance, the control device is configured to activate the rinsing housing before the circulation pumping process and the rotation time period in order to convey the washing liquid into the lye container up to a conveying level, wherein the conveying level is arranged above the drum bottom side of the washing drum.

The technical advantage achieved thereby is that by conveying the washing liquid into the lye container up to the conveying level, it is ensured that the washing drum comes into contact with the washing liquid up to a sufficient height. The level of the feed liquid of the washing liquid, which is arranged above the drum bottom side of the washing drum, thus ensures that the laundry present in the washing drum is sufficiently wetted when the washing drum is rotated.

In a further advantageous embodiment of the laundry care appliance, the control device is configured to activate the drum drive when the washing liquid in the lye container reaches a circulating pumping level in order to rotate the washing drum during a rotation period, wherein the circulating pumping level is arranged below the drum bottom side of the washing drum.

The technical advantage achieved thereby is that the mechanical load of the laundry care appliance, which occurs during the rotation period at high rotational speeds of the washing drum, can be reduced by the temporally delayed activation of the rotation period after the activation of the cyclical pumping process. After activating the circulation pumping process, the liquid level of the washing liquid in the lye container drops until the circulation pumping liquid level below the drum bottom side of the washing drum before the next start of the rotation period. As a result, both the washing drum and the items of laundry located therein are no longer in contact with the washing liquid during the rotation time period. In this case, the floating laundry also drops in the washing drum as a result of the dropping washing liquid level and comes into contact with the washing drum.

In a further advantageous embodiment of the laundry care appliance, the drum drive is configured to drive the washing drum during the rotation period at a contact rotational speed in order to bring the laundry into contact with the washing drum, wherein the contact rotational speed in particular comprises a range from 50 revolutions per minute to 150 revolutions per minute.

The technical advantage achieved thereby is that, in the circulating pumping level arranged below the drum bottom side of the washing drum, the washing drum can be driven at a contact rotational speed without mechanical loads being generated by the rotating washing drum coming into contact with the washing liquid, and the mechanical loads in the laundry care appliance are thereby reduced. Here, the contact rotational speed is also sufficient for the floating laundry to be effectively brought into contact with the washing drum by the centrifugal force generated during the rotation process. In this way, the laundry placed on the washing drum can be carried along particularly effectively by the rotating washing drum, in order to ensure complete wetting of the laundry during the circulating pumping.

In a further advantageous embodiment of the laundry care appliance, the control device is designed to end the rotation period when the washing liquid fed into the lye container reaches an upper liquid level, wherein the upper liquid level is arranged above the drum bottom side of the washing drum.

The technical advantage achieved thereby is that the mechanical load of the laundry care appliance, which occurs at high rotational speeds during a rotation period, can be reduced. The elevated washing liquid level in the lye container leads to an increased mechanical load on the laundry care appliance as a result of the washing liquid present during rotation of the washing drum.

In a further advantageous embodiment of the laundry care appliance, the contact of the laundry with the washing drum during the period of rotation is achieved by lowering the washing liquid in the lye container during the circulation pumping process.

The technical advantage achieved thereby is that the laundry floating on the washing liquid is brought into contact with the washing drum by the washing liquid falling in the lye container, while the washing drum does not rotate at a high rotational speed during the rotation time period. During the circulation pumping process, the washing liquid is pumped out of the lye container, whereby the washing liquid level in the lye container is lowered, so that the laundry floating on the washing liquid comes into contact with the washing drum. When the washing drum is rotated at a low rotational speed, the laundry is advantageously brought into contact with the washing drum and is thereby effectively tumbled. Within the framework of the circulating pumping process, the pumped-out washing liquid is conveyed back to the lye container, whereby the laundry which is in contact with the washing drum and is moved through the washing drum can be effectively wetted from all sides.

In a further advantageous embodiment of the laundry care appliance, the control device is designed to activate the lye pump and the drum drive simultaneously in order to carry out the circulation pumping process and the rotation period simultaneously.

The technical advantage achieved thereby is that the laundry is brought into contact with the washing drum and at the same time effectively wetted through by simultaneously carrying out the circulation pumping process and the rotation time period, since the washing liquid is still in the lye container at the beginning of the circulation pumping process. The rotation time interval is in particular carried out at a low rotational speed of the washing drum in order to prevent damage to the laundry care appliance by the washing liquid which is still in contact with the washing drum at the beginning of the circulation pumping process as a result of an excessively fast rotation of the washing drum. The rotation period started simultaneously with the cyclical pumping process may comprise the entire duration of the cyclical pumping process, but may alternatively comprise only a part of the cyclical pumping process.

In a further advantageous embodiment of the laundry care appliance, the control device is configured to activate the rinsing housing during the filling process after the circulation pumping process and the end of the rotation time period in order to convey the washing liquid to the lye container, wherein the control device is configured to deactivate the drum drive during the filling process.

The technical advantage achieved thereby is that a particularly effective wetting of the laundry in the washing drum is ensured by the additional washing liquid being supplied during the filling process, since the washing liquid level in the lye container rises. By deactivating the drum drive during the filling process, it is ensured that the washing drum does not rotate when the washing liquid level in the lye container rises, whereby damage to the laundry care appliance as a result of mechanical loading can be prevented.

In a further advantageous embodiment of the laundry care appliance, the drum drive is designed to rotate the washing drum during a rotation period by at least half a drum revolution, in particular by half or a full drum revolution.

The technical advantage achieved thereby is that a particularly effective wetting of the laundry in contact with the washing drum is achieved by the washing drum being rotated during a rotation period by at least half a drum revolution, in particular by half or the entire drum revolution. Here, half a drum revolution is sufficient, so that the laundry in contact with the washing drum can be wetted from both sides during the circulating pumping of washing liquor in the laundry care.

In a further advantageous embodiment of the laundry care appliance, the drum drive is configured to rotate the washing drum in the direction of rotation or in the opposite direction during a rotation period.

The technical advantage achieved thereby is that the laundry placed on the washing drum can be effectively moistened during the rotation time period and during the circulating pumping process by rotating the washing drum in the rotation direction during the rotation time period or by rotating the washing drum counter to the rotation direction.

In a further advantageous embodiment of the laundry care appliance, a delivery nozzle is arranged on the inlet opening, wherein the delivery nozzle is designed to spread the washing liquid pumped into the lye container through the inlet opening onto the laundry in the washing drum.

The technical advantage achieved thereby is that the washing liquid pumped in circulation through the line can be effectively spread onto the items of laundry in the washing drum by means of the delivery nozzles arranged on the inlet openings. In this case, a continuous circulation of the washing liquid in the laundry care appliance is set during the circulation pumping process, so that the circularly pumped washing liquid is distributed at the delivery nozzles and can thus wet the laundry lying on the washing drum in a particularly wide fan-shaped distribution.

In a further advantageous embodiment of the laundry care appliance, the control device is designed to repeat the cyclical pumping process and the rotation period a plurality of times, in particular once, twice, three times.

The technical advantage achieved thereby is that by repeating the circulating pumping process and the rotation time period several times, it is ensured that all the floating laundry present in the washing drum is in contact with the washing drum and thus that sufficient wetting of the floating laundry is ensured.

In a further advantageous embodiment of the laundry care appliance, the laundry received in the washing drum comprises sensitive laundry, in particular laundry made of wool or silk.

The technical advantage achieved thereby is that the laundry made of wool or silk floats on the washing liquid due to its textile properties, ensuring an effective contact of the laundry with the washing drum during the circulation pumping process and the rotation period.

In a further advantageous embodiment of the laundry care appliance, a plurality of projections are arranged in the washing drum, which projections are designed to move the laundry in the washing drum during rotation of the washing drum.

The technical advantage achieved thereby is that the effective movement of the laundry in the rotating washing drum is ensured by the projection, which is in particular designed as a laundry catch. The projection is in particular configured for effectively moving the laundry in contact with the washing drum during the rotation period.

According to a second aspect of the invention, this object is achieved by a method for washing laundry in a laundry care appliance having a lye container for receiving washing liquid, a washing drum for receiving the laundry, a drum drive for rotating the washing drum and a control device, wherein the lye container comprises an outlet opening and an inlet opening, wherein the outlet opening is fluidically connected to the inlet opening by a line, wherein a lye pump for pumping washing liquid is arranged in the line, and wherein the control device is used for controlling the drum drive and the lye pump, wherein the method comprises: activating the lye pump during the circulating pumping process in order to pump washing liquid from the lye container into the pipeline through the discharge opening and to re-convey the pumped washing liquid through the pipeline and through the inlet opening into the lye container; and activating the drum drive so as to rotate the washing drum during the rotation period and bring the laundry into contact with the washing drum.

The technical advantage achieved thereby is that particularly effective wetting of the laundry floating on the washing liquid in the washing drum is achieved by bringing the laundry into contact with the washing drum during the rotation period and by circulating the washing liquid during the circulation pumping process.

Drawings

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

In the drawings:

fig. 1 shows a schematic view of a laundry care appliance;

FIG. 2 shows a schematic view of a circulating pumping system with a lye container and a lye pump;

fig. 3 shows a diagram of a washing process in a laundry care appliance according to an embodiment;

fig. 4 shows a diagram of a washing process in a laundry care appliance according to a further embodiment; and

fig. 5 shows a schematic view of a method for washing laundry in a laundry care appliance.

Detailed Description

Fig. 1 shows a schematic view of a conventional laundry care appliance 100, for example a washing machine. The laundry care appliance 100 comprises a rinsing housing 101 into which a detergent or other liquid substance can be injected. The laundry care appliance 100 comprises a door 103 for accommodating the laundry in the laundry care appliance 100.

Fig. 2 shows a schematic representation of a circulating pumping system in a laundry care appliance 100 having a lye container 105 for receiving washing liquid and a washing drum 107 for receiving laundry. The washing drum 107 has a drum bottom side 109 and is driven by a drum drive 111. The laundry care appliance 100 further comprises a flush-in housing 101 for receiving washing liquid or other liquid substances, which is fluidically connected to the lye container 105 via a feed line 113 in order to feed the washing liquid to the lye container 105.

The lye container 105 comprises an outlet opening 115 and an inlet opening 117, wherein the outlet opening and the inlet opening are fluidically connected by a line 119 of a circulating pumping system, wherein a lye pump 121 for pumping washing liquid through the line 119 is arranged in the line 119. The lye pump 121 can pump washing liquid from the lye container 105 through the discharge opening 115 into the line 119 during a circulating pumping process not shown in FIG. 2 and re-convey the pumped washing liquid through the line 119 and through the inlet opening 117 to the lye container 105. Fresh washing liquid can thereby be pumped effectively through the line 119 and re-delivered to the laundry in the washing drum 107 during the laundry care process. The laundry care effect during the laundry care process can thereby be improved.

The laundry care appliance 100 further comprises a control device 123 which is connected to the lye pump 121 via a first control connection 125, to the drum drive 111 via a second control connection 127 and to the flushing housing 101 via a third control connection 129 in order to activate or deactivate the lye pump 121, the drum drive 111 and the flushing housing 101. The control device 123 is designed to activate the lye pump 121 during the circulation pumping process and to activate the drum drive 111 during the rotation time period.

Fig. 3 shows a diagram of a washing process in a laundry care appliance according to an embodiment.

Fig. 3 shows a time diagram of the temperature of the washing liquid, the delivery volume of the washing liquid, the rotational speed of the washing drum 107 and the pump power of the lye pump 121, which are plotted along the ordinate axis 131 in relation to time, which is given along the abscissa axis 133.

A first curve 135 shows the course of the temperature of the washing liquid in the circulation pumping system of the laundry care appliance 100. A second curve 137 shows the course of the delivery volume of the washing liquid in the recirculating pumping system of the laundry care appliance 100. A third curve 139 shows the course of the rotational speed of the washing drum 107. The fourth curve 141 shows the profile of the pump power of the lye pump 121.

As shown in the second curve 137, the rinsing housing 101 is activated by the control device 123 before the circulation pumping process and before the rotation period of the washing drum 107 in order to convey the washing liquid to the lye container 105. The washing liquid is conveyed to the lye container 105 for so long that the washing liquid in the lye container 105 has a conveying level, wherein the conveying level is higher than the drum bottom side 109 of the washing drum 107, wherein the conveying level is sufficient for covering the lye tank below the lye container 105 and is higher than the drum bottom side 109, in particular by 1cm to 3 cm.

As shown in the fourth curve 141, at the beginning of the circulation pumping process, the lye pump 121 is activated by the control device 123, the washing liquid is pumped out of the lye container 105 and the washing liquid level in the lye container 105 drops. In this case, the washing liquid level reaches a circulating pumping level after activation of the lye pump 121, wherein the circulating pumping level is arranged in the lye container 105 below the drum bottom side 109 of the washing drum 107, so that the laundry in the washing drum 107 is no longer in contact with the washing liquid.

As shown in the third curve 139, after activation of the lye pump 121, when the washing liquid level in the lye container 105 reaches the circulating pumping level, the drum drive 111 is activated by the control device 123 in order to rotate the washing drum 107 at the contact rotational speed and to bring the laundry into contact with the washing drum 107. The contact rotational speed can in particular lie in the range between 50 rpm and 150 rpm, as a result of which the centrifugal force generated in this case can lead to an effective intermediate dewatering of the laundry placed on the washing drum 107 during the rotation period.

In the case of a laundry care appliance 100 with a recirculating pumping system, the laundry is temporarily brought into contact with the washing drum 107 by the washing drum 107 being rotated at a contact rotational speed, so that an intermediate dewatering in the wash takes place.

During the circulation pumping process, the washing liquid pumped by the lye pump 121 from the lye container 105 into the line 119 is re-conveyed through the inlet opening 117 to the lye container 105, so that a continuous circulation of the washing liquid is achieved in the line 119 during the circulation pumping process. The washing liquid pumped into the lye container 105 through the inlet opening 117 is guided as a water jet onto the laundry portion which rests on the washing drum 107 during the rotational time period, wherein the water jet reaches the crust of the washing drum 107 in a fan-shaped manner, in particular, in order to effectively wet the textiles. This results in optimum wetting of the laundry lying against the washing drum 107 and in an improved washing result by effective flow through the laundry.

As shown in the third and

fourth curves

139, 141, the rotational speed of the washing drum 107 is then reduced again in order to end the rotation period. The lye pump 121 is then deactivated in order to end the circulating pumping process. The duration of the circulating pumping process and the spinning time period can be flexibly implemented and repeated once, twice or three times as necessary depending on the laundry amount, the type of laundry and/or the selected laundry care program time.

As shown in the second curve 137, when the washing drum 107 is not rotating, the flushing shell 101 is reactivated by the control device 123 in order to convey washing liquid to the lye container 105 during the filling process. The washing liquid level in the lye container 105 is again raised by the filling process, so that the washing drum 107 and the items of laundry located therein are again brought into contact with the washing liquid. In this case, the level of the washing liquid can be continuously raised by a further filling step and the lye pump 121 can be reactivated in order to circulate the washing liquid in the laundry care appliance 100. As soon as the washing liquid level is above the drum bottom side 109 of the washing drum 107 upon reactivation of the lye pump 121 and the laundry is thereby brought into contact with the washing liquid, the drum drive 111 is activated by the control device 123. However, the drum drive 111 rotates the washing drum 107 not at the contact rotational speed but only at a low rotational speed. This prevents the vibration system stabilizing the lye container 105 from moving violently, which can lead to an excessively strong mechanical loading of the laundry care appliance. On the other hand, sensitive laundry shrinkage made of wool is avoided.

Fig. 4 shows a diagram of a washing process in a laundry care appliance according to a further embodiment. Fig. 4 shows a time diagram of the temperature of the washing liquid, the delivery volume of the washing liquid, the rotational speed of the washing drum 107 and the pump power of the lye pump 121, which are plotted along the ordinate axis 131 in relation to time, which is given along the abscissa axis 133.

In accordance with the embodiment shown in fig. 3, as shown according to a second curve 137, before the circulation pumping process and before the period of rotation of the washing drum 107, the washing liquid is conveyed into the lye container 105 for so long that the washing liquid in the lye container 105 has a conveying level, wherein the conveying level is higher than the drum bottom side 109 of the washing drum 107, in particular 1cm to 3cm higher than the drum bottom side 109.

As shown in the fourth curve 141, the washing liquid is pumped out of the lye container 105 at the beginning of the circulation pumping process. In this case, the washing liquid in the lye container drops during the circulation pumping process, wherein the laundry floating on the washing liquid is thereby brought into contact with the washing drum.

During the circulation pumping process, the drum drive 111 is activated by the control device 123, whereby the washing drum 107 is rotated at a low rotational speed, in order to tumble the laundry in the washing drum 107 at a low water level. In laundry care programs for typically floating laundry fractions, for example in programs for woolen textiles, when the lye pump 121 is activated during the circulation pumping process, the washing drum 107 is then moved all the time. During the circulating pumping process, the washing lye level in the lye container 105 drops, the laundry comes into contact with the washing drum 107 and the washing drum 107 rotates at least half a drum rotation, in particular at least one rotation through 180 °, thereby tumbling the laundry. Depending on the sensitivity of the textile, the textile can also be turned over several times in the case of wool, unidirectionally and in the case of silk in a reversed manner, for a switch-on duration of 33%.

Furthermore, during the circulation pumping process, the washing liquid pumped by the lye pump 121 from the lye container 105 into the line 119 is re-conveyed through the inlet opening 117 to the lye container 105, so that a continuous circulation of the washing liquid is achieved in the line 119 during the circulation pumping process. The washing liquid pumped into the lye container 105 through the inlet opening 117 is guided as a water jet onto the laundry portion in the washing drum 107, wherein the water jet reaches the crust of the washing drum 107 in a particularly wide, fan-shaped manner in order to effectively wet the textiles.

The duration of the cyclical pumping process with reversal can be designed in a time-flexible manner and can be repeated once to three times if necessary. The level of the washing liquid in the lye container 105 can be raised here by successive further filling steps.

However, as soon as the washing liquid level is higher than the drum bottom 109 of the washing drum 107 by more than 1cm to 3cm and the laundry is thereby brought into contact with the washing liquid, the drum drive 111 is controlled by the control device 123 in such a way that the washing drum 107 does not rotate or only the washing drum 107 rotates slightly. This prevents the shrinkage of sensitive laundry made of wool.

In the laundry care appliance 100 with a circulation pump system, the washing liquid is pumped out of the lye container 105 by the lye pump 121 and the pumped-out washing liquid is conveyed again from above to the laundry in the washing drum 107 via the inlet opening 117. Here, the lye pump 121 is cyclically switched on. During the activation of the lye pump 121, the washing liquid in the washing drum 107 descends, so that in the case of small amounts of washing liquid in the lye container 105 also the floating laundry parts come into contact with the washing drum 107.

The combination of the circulation pumping, which comprises the lowering of the washing liquid in the lye container 105 by the circulation of the washing liquid in the circulation pumping system and the wetting of the laundry in the washing drum 107, and the rotation of the washing drum during the period of rotation leads to an efficient movement and cleaning without damage of sensitive, not easily wettable textiles, such as wool or silk.

The combination of the circulation pumping process and the rotation period achieves an improved total wetting of the poorly wettable textiles by the circulation pumped washing liquid wetting the textiles from all sides. In particular, a changed level of the washing liquid in the washing drum 107 is used, as a result of which the laundry floating on the washing liquid can be brought into contact with the washing drum 107. By optimally adjusting the washing liquid which is fed back through the inlet opening of the lye container 105, an advantageous care of the laundry within the framework of a vertical washing process is achieved.

Fig. 5 shows a schematic illustration of a method 200 for washing laundry in the laundry care appliance 100 according to the embodiment of fig. 3 and 4.

The method 200 comprises the following steps: during the circulation pumping process, the lye pump 121 is activated 201 in order to pump washing liquid from the lye container 105 through the discharge opening 115 into the line 119 and to re-convey the pumped washing liquid through the line 119 and through the inlet opening 117 to the lye container 105. The method 200 further comprises: the drum drive 111 is activated 203 in order to rotate the washing drum 107 during a rotation period and to bring the laundry into contact with the washing drum 107.

This makes it possible to achieve a particularly effective washing of the laundry floating in the washing liquid.

All features described and shown in connection with the individual embodiments of the invention can be provided in the subject matter according to the invention in different combinations in order to achieve their advantageous effects at the same time. The scope of protection of the invention is given by the claims and is not limited to the features described in the description or shown in the drawings.

List of reference numerals

100 washing nursing device

101 punch-in shell

103 door

105 lye container

107 washing drum

109 drum underside

111 roller driving device

113 conveying pipeline

115 discharge port

117 entry port

119 pipeline

121 lye pump

123 control device

125 first control connection

127 second control connection

129 third control connection

131 ordinate axis

133 axis of abscissa

135 first curve

137 second curve

139 third curve

141 fourth curve

200 method for washing laundry

201 first method step: cyclic pumping process

203 second method step: time period of rotation

Claims

1. A laundry care appliance (100) having a lye container (105) for receiving washing liquor, a washing drum (107) for receiving the washing liquor, a drum drive (111) for rotating the washing drum (107) and a control device (123), wherein the lye container (105) comprises an outlet opening (115) and an inlet opening (117), wherein the outlet opening (115) is fluidically connected to the inlet opening (117) via a line (119), wherein a lye pump (121) for pumping washing liquor is arranged in the line (119), and wherein the control device is used to control the drum drive (111) and the lye pump (121),

wherein the control device (123) is designed to activate the lye pump (121) during a circulating pumping process in order to pump wash liquor from the lye container (105) into the line (119) through the discharge opening (115) and to re-convey the pumped wash liquor to the lye container (105) through the line (119) and through the inlet opening (117), and

the control device (123) is designed to activate the drum drive (111) during a cyclical pumping process in order to rotate the washing drum (107) during a rotation period and to bring the laundry into contact with the washing drum (107),

characterized in that the control device (123) is configured to activate the drum drive (111) when the washing liquid in the lye container (105) reaches a circulating pumping level in order to rotate the washing drum (107) during a rotation time period, wherein the circulating pumping level is arranged below the drum bottom side (109) of the washing drum (107) such that after activation of the circulating pumping process, before the next start of the rotation time period, the level of the washing liquid in the lye container (105) drops down to the circulating pumping level below the drum bottom side (109) of the washing drum (107), the floating laundry also dropping down in the washing drum (107) due to the dropping level of the washing liquid.

2. Laundry care appliance (100) according to claim 1, characterized in that the laundry care appliance (100) has a flush-in housing (101) for supplying washing liquor, wherein the flush-in housing (101) is fluidically connected to the lye container (105) by means of a conveying line (113), wherein the control device (123) is configured to activate the flush-in housing (101) in order to convey washing liquor from the flush-in housing (101) to the lye container (105) via the conveying line (113).

3. The laundry care appliance (100) according to claim 2, characterized in that the control device (123) is configured for activating the flush-in housing (101) before the circulating pumping process and the rotation period in order to convey washing liquid to the lye container (105) up to a conveying level, wherein the conveying level is arranged above a drum bottom side (109) of the washing drum (107).

4. A laundry care appliance (100) as claimed in any one of claims 1 to 3, characterized in that the drum drive (111) is configured for driving the washing drum (107) at a contact rotational speed during the rotation period in order to bring the laundry into contact with the washing drum (107).

5. A laundry care appliance (100) as claimed in claim 4, characterized in that the contact rotation speed comprises a range from 50 to 150 revolutions per minute.

6. Laundry care appliance (100) according to any of claims 1-3, 5, characterized in that the control device (123) is configured to end the spin period when the washing liquid fed in the lye container (105) reaches an upper level, wherein the upper level is arranged above the drum bottom side (109) of the washing drum (107).

7. The laundry care appliance (100) according to claim 2 or 3, characterized in that the control device (123) is configured to end the rotation time period when the washing liquid fed in the lye container (105) reaches an upper liquid level, wherein the upper liquid level is arranged above the drum bottom side (109) of the washing drum (107), wherein the control device (123) is configured to activate the flush shell (101) during a filling process after the circulation pumping process and the end of the rotation time period in order to convey the washing liquid to the lye container (105), wherein the control device (123) is configured to deactivate the drum drive device (111) during the filling process.

8. A laundry care appliance (100) according to any of claims 1-3, 5, characterized in that the drum drive (111) is configured for rotating the washing drum (107) at least half a drum revolution during the rotation period.

9. Laundry care appliance (100) according to any of claims 1-3, 5, characterized in that the drum drive (111) is configured for rotating the washing drum (107) in a rotational direction or in the opposite direction during the rotation period.

10. Laundry care appliance (100) according to any of claims 1-3, 5, characterized in that a delivery nozzle is arranged on the inlet opening (117), wherein the delivery nozzle is configured for spreading washing liquid pumped into the lye container (105) through the inlet opening (117) onto the laundry in the washing drum (107).

11. A laundry care appliance (100) according to any of claims 1-3, 5, characterized in that the control device (123) is configured for repeating the cyclic pumping process and the rotation period a plurality of times.

12. A laundry care appliance (100) according to any of claims 1-3, 5, characterized in that the laundry received in the washing drum (107) comprises sensitive laundry.

13. A laundry care appliance (100) as claimed in claim 12, characterized in that the laundry received in the washing drum (107) comprises laundry made of wool or silk.

14. A laundry care appliance (100) according to any of claims 1-3, 5, 13, characterized in that a plurality of protrusions are arranged in the washing drum (107), which protrusions are configured for moving laundry in the washing drum (107) during rotation of the washing drum (107).

15. A method (200) for washing laundry in a laundry care appliance (100) having a lye container (105) for receiving washing liquor, a washing drum (107) for receiving the laundry, a drum drive (111) for rotating the washing drum (107), and a control device (123), wherein the lye container (105) comprises an outlet opening (115) and an inlet opening (117), wherein the outlet opening (115) is fluidically connected to the inlet opening (117) by a line (119), wherein a lye pump (121) for pumping washing liquor is arranged in the line (119), and wherein the control device is used for controlling the drum drive (111) and the lye pump (121), wherein the method (200) comprises:

activating (201) the lye pump (121) during a circulating pumping process in order to pump wash liquor from the lye container (105) into the line (119) through the discharge opening (115) and to re-convey the pumped wash liquor to the lye container (105) through the line (119) and through the inlet opening (117), and

activating (201) the drum drive (111) in order to rotate the washing drum (107) during a rotation period and to bring the laundry into contact with the washing drum (107),

characterized in that the drum drive (111) is activated when the washing liquid in the lye container (105) reaches a circulating pumping level in order to rotate the washing drum (107) during a rotation time period, wherein the circulating pumping level is arranged below the drum bottom side (109) of the washing drum (107), such that after activating the circulating pumping process, the level of the washing liquid in the lye container (105) drops down to the circulating pumping level below the drum bottom side (109) of the washing drum (107) before starting the rotation time period next, the floating laundry also dropping down in the washing drum (107) due to the dropping level of the washing liquid.