EP3320137A1

EP3320137A1 - Laundry care apparatus and laundry care method

Info

Publication number: EP3320137A1
Application number: EP16720141.7A
Authority: EP
Inventors: Rodrigo FERRAZ MAINA; Thorsten Schiegl
Original assignee: BSH Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2015-07-08
Filing date: 2016-05-04
Publication date: 2018-05-16
Anticipated expiration: 2036-05-04
Also published as: CN107849775A; EP3320138A1; CN107849777B; WO2017005390A1; CN107849777A; CN107849775B; EP3320137B1; PL3320138T3; EP3320138B1; PL3320137T3; WO2017005391A1

Abstract

Disclosed is a laundry care apparatus (100) and an associated laundry care method. The laundry care apparatus comprises a rotatably mounted inner tub (106) for accommodating items of laundry (108), a drive motor (105) for rotating the inner tub (106), a feeding device (114) for feeding fresh water and detergent into the inner tub (106), a pumping device (120) for recirculating the washing liquid out of the inner tub (106) and back into the inner tub (106), and a control device (118) for controlling the drive motor (105), the feeding device (114) and the pumping device (120) in accordance with a laundry care program running on the control device (118) during operation of the apparatus. The control device (118) is designed to activate the feeding device (114) during a first feeding step of a laundry care program during which fresh water and detergent is fed to the inner tub (106) by means of the feeding device (114). It is also designed to deactivate the latter at the end of a first feeding interval and to activate, within a tolerance interval, the pumping device (120) at the same time when the feeding device (114) is activated, and to deactivate the pumping device at the end of a first pumping interval.

Description

Laundry care device and laundry care process

The present invention relates to a laundry care device and a

Laundry care procedures.

A laundry care device is in the context of the present invention, in particular a washing machine, but may also be, for example, a machine for rinsing and / or impregnating laundry items. These other functions can also be integrated in a washing machine.

In the context of a laundry care program of a laundry care appliance, such as e.g. a washing machine, in a dispensing operation by means of a dispenser, a detergent from a detergent receptacle is rinsed together with fresh water in the laundry drum of the laundry care device to the existing laundry items in the laundry drum with the mixture of detergent and fresh water, which is also referred to herein as alkali or washing liquid, to wet. To the entire detergent, which is located in the detergent container, in the

To flush the laundry drum of the laundry care device, usually come at the beginning of a laundry care program several consecutive times

Einspülvorgänge used, which together a Einspülphase the

Define laundry maintenance program.

An important factor for achieving a good washing result is that during the flushing phase of a laundry care program the laundry items are wetted or moistened as completely and uniformly as possible with the washing liquid. At Einspülphasen conventional laundry care bones in this regard, at least in part, still needs improvement.

The published patent EP 2 246 469 A1 shows a washing machine with a

Circulation pump. The published patent application DE 35 01 760 A1 shows a method and a device for washing laundry in a drum washing machine.

The published patent application EP 2 348 151 A1 shows a method for operating a washing machine with a circulating device and a washing machine.

It is the object underlying the invention to provide a laundry care device and a laundry care method, which, in particular in light of the above-mentioned disadvantages, enable a more efficient care of laundry items. This object is achieved by articles having the features according to the independent claims. Advantageous embodiments of the invention are the subject of the figures, the description and the dependent claims.

According to a first aspect of the invention, the object is achieved by a

Laundry care device with a rotatably mounted laundry drum for receiving laundry items, a drive motor for rotating the laundry drum, a

Einspülvorrichtung for flushing fresh water and detergent in the

Laundry drum, a pumping device for recirculating washing liquid out of the laundry drum and back into the laundry drum and one

Control device for driving the drive motor, the Einspülvorrichtung and the pumping device according to a running in operation on the control device laundry care program. In this case, the control device is designed to control the drive motor of the laundry drum such that the drive motor reversibly drives the laundry drum over a first reversing period at the end of a first flushing process of the laundry care program in which fresh water and detergent is flushed into the laundry drum by means of the flushing device, and After the drive motor has reversed the drum during the first reversing period at least once when deactivated Umpumpvorrichtung, ie has rotated in one direction of rotation and in the opposite direction of rotation, the

Activate pumping device and disable at the end of a second pumping period. This has, for example, the technical advantage that by reversing

in particular, the laundry items resting on the inside of the laundry drum are wetted with washing liquid via the jacket of the laundry drum and, in particular, the items of laundry lying inside the laundry drum, also referred to as laundry core, are well wetted with washing liquid due to the washing liquid introduced into the laundry drum by the pumping device become.

This means in particular that at the above-mentioned end of the first

Einspülvorgangs the Umpumpeinrichtung during the first reversing period remains disabled until the laundry drum has reversed at least once, especially several times during the first reversing period.

According to one embodiment, the control device is designed to deactivate an activated pumping device at the end of the first flushing process and to activate it again only when the laundry drum has reversed at least once, in particular several times, during the first reversing period.

The phrase "reversed at least once" thus includes in particular that the laundry drum has reversed several times, for example twice, three times or four times, during the first reversing period.

By a repeated reversing particular technical advantage is achieved, that in particular the adjacent to the inside of the laundry drum laundry items are wetted particularly efficiently over the jacket of the laundry drum with washing liquid and caused by the Umpumpvorrichtung bringing the

Washing liquid in the laundry drum in particular the more inside the

Laundry drum lying laundry, also known as laundry core, are particularly well wetted with washing liquid.

In an advantageous embodiment, the control device is designed, in the context of the first flushing process of the laundry care program, the

Activate flushing device and at the end of the first Einspülzeitraums to

disable and at the same time within a tolerance period with the activation of the Einspülvorrichtung the pumping device to activate and disable at the end of a first pumping period.

As a result, for example, the technical advantage is achieved that previously undissolved detergent residues are still actively mixed with the washing liquid and deposit less previously unresolved detergent residues in parts of the Wäschepflegeräts.

In an advantageous embodiment, the first flushing process of the laundry care program is the time-first flushing process of the

Laundry care program. As a result, the technical advantage is achieved, for example, that when the time first flushing a laundry care program, in which usually the largest part of the detergent is rinsed into the laundry drum, is provided for a better dissolution of the detergent in the washing liquid.

In an advantageous embodiment, the control device is designed to control the drive motor of the laundry drum such that during the second

Umpumpzeitraums the laundry drum is rotated at least temporarily with application speed. This has in particular the technical advantage that all items of laundry (even at full load) are evenly wetted or moistened, since during the rotation of the laundry drum with application speed the laundry items abut due to the centrifugal forces on the inside of the laundry drum and introduced by the pumping device in the laundry drum Washing liquid directly on the applied to the inside of the laundry drum coat of laundry hits. As a result of the centrifugal forces occurring during rotation with the application speed, the washing liquid is also pressed out of the items of laundry and can be returned to the laundry drum via the circulating pump for further wetting of the laundry items.

In an advantageous embodiment, the end of the second pumping period within a tolerance period coincides with the end of the first reversing period. This has, for example, the technical advantage that the phase of wetting by reversing and pumping can be followed by a rest phase.

In an advantageous embodiment, the control device is designed to operate the circulating pump device during the second pumping period such that the volume flow conveyed by the pumping device is greater than or equal to a dripping rate or drip rate of the laundry items. this has

For example, the technical advantage that already at the beginning of by the

Deactivation of the drive motor and the recirculation pump introduced rest phase, the loading of the laundry care device can be estimated by the laundry items based on the pressure of the washing liquid.

In an advantageous embodiment, the control device is designed to operate after the end of the first reversing period and the second pumping period, i.

during the rest period following the first reversing period and the second pumping period, the pressure of the washing liquid, in particular in the

Laundry drum or the tub to detect and adjust based on this pressure parameters of running on the controller laundry care program. This has, for example, the technical advantage that parameters of the laundry care program can be adapted to the actual load, for example to reduce energy consumption.

According to a second aspect of the invention, the object is achieved by a

Laundry care process for a laundry care device with a rotatably mounted

Laundry drum for picking up laundry, a drive motor for

Rotating the laundry drum, a Einspülvorrichtung for injecting fresh water and detergent into the laundry drum, a pumping device for recirculating washing liquid from the laundry drum out and back into the laundry drum and a control device for driving the drive motor, the

Einspülvorrichtung and the pumping device according to one in operation on the

Control device running laundry maintenance program. It includes the

Laundry maintenance process, the steps by means of the control device at the end of a first Einspülvorgangs the laundry care program in which by means of Einspülvorrichtung fresh water and detergent is washed into the laundry drum to drive the drive motor of the laundry drum such that the drive motor reversibly drives the laundry drum over a first reversing period, and , after the

Drive motor has reversed the laundry drum during the first reversing period at least once to activate the pumping device and disable at the end of a second pumping period. This has, for example, the technical advantage that by reversing

According to one embodiment, the control device deactivates an activated pumping device at the end of the first flushing process and activates it again only when the laundry drum has reversed at least once, in particular several times, during the first reversing period.

Washing liquid in the laundry drum in particular the more inside the

Laundry drum lying laundry, also known as laundry core, are particularly well wetted with washing liquid. In an advantageous embodiment, the flushing device is activated by the control device as part of the first flushing process of the laundry care program and deactivated at the end of the first Einspülzeitraums and simultaneously within a

Tolerance period with the activation of Einspülvorrichtung the pumping device activated and deactivated at the end of a first pumping period.

As a result, for example, the technical advantage is achieved that previously undissolved detergent residues are still actively mixed with the washing liquid and deposit less previously unresolved detergent residues in parts of the Wäschepflegeräts. In an advantageous embodiment, the first flushing process of the laundry care program is the time-first flushing process of the

Laundry care program acts. As a result, the technical advantage is achieved, for example, that when the time first flushing a laundry care program, in which usually the largest part of the detergent is rinsed into the laundry drum, is provided for a better dissolution of the detergent in the washing liquid.

In an advantageous embodiment, the control device controls the drive motor of the laundry drum in such a way that during the second pumping period, the

Laundry drum is rotated at least temporarily with application speed. this has

in particular, the technical advantage that all items of laundry (even at full load) evenly wetted or moistened, since during the rotation of the laundry drum with application speed the laundry due to the centrifugal forces on the inside of the laundry drum and the introduced by the pumping device in the laundry drum washing liquid directly on the applied to the inside of the laundry drum coat of laundry hits. By in the rotation with

Anfegedreh occurring centrifugal forces is also the washing liquid from the

Washed out pieces of laundry and can be supplied via the pumping device for further wetting the laundry items of the laundry drum again.

In an advantageous embodiment, the control device operates the

Umpumpvorrichtung during the second pumping period such that the volume delivered by the pumping device flow greater than or equal to one

Drip rate of the laundry items is. This has for example the technical advantage that already at the beginning of the deactivating the drive motor and the

Umpumpvorrichtung initiated rest phase, the loading of the laundry care device can be estimated by the laundry items based on the pressure of the washing liquid. In an advantageous embodiment, the control device detects the pressure of the after the end of the first reversing period and the second pumping period

Washing liquid, in particular in the laundry drum or the tub, and adapts on the basis of this pressure parameters of running on the control device laundry care program. This has, for example, the technical advantage that parameters of the laundry care program can be adapted to the actual load, for example to reduce energy consumption.

Technical functionalities of the laundry care process are immediately analogous to corresponding technical functionalities of the laundry care appliance and vice versa.

In one embodiment, it is provided that the laundry care process is carried out or carried out by means of the laundry care appliance.

In one embodiment, the laundry-care appliance is designed or set up to carry out or carry out the laundry care process.

Further 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;

FIG. 2 is an exemplary schematic diagram showing the time course of a plurality of variables during a dispensing phase of a laundry care process. FIG

illustrated; 3 is an exemplary schematic diagram showing the time course of pressure for two different loadings during a dispensing phase of a

Laundry care process in a laundry care device in the form of a Washing machine according to the present invention and a conventional

Washing machine illustrated;

4 is an exemplary schematic diagram illustrating the timing of multiple sizes in a laundry care process; and

5 is a detail view of a detail of the schematic diagram of FIG. 4.

Figure 1 shows a schematic representation of a washing machine representative of a general laundry care device 100. The laundry care device 100 in the form of a

Washing machine is used for washing laundry and similar laundry with a detergent. If necessary, the washing machine can also be used as a

Washer dryer be designed to wash laundry items or similar laundry and dry. In the context of the invention, the term

"Detergent" understood in addition to conventional detergents and treatment additives, such as fabric softener, rinse aid or odor control in various forms (liquid, gel, pasty or powdered).

The washing machine 100 of Figure 1 includes in a machine housing 102 fixed in the machine housing tub 104. A laundry drum 106 is rotatably mounted in the tub 104 about a horizontal axis of rotation and can be rotated by means of a drive motor 105 at different speeds in rotation, via a electronic control device 1 18 is controlled. In the

Laundry drum 106 laundry items 108 are indicated, which are raised by the driver 1 10 on the inside of the laundry drum 106 when turning the laundry drum 106 and fall down again. Thereby finds when rotating the

Laundry drum 106 a constant redeployment of the laundry items 108 instead.

Fresh water can by means of a Einspülvorrichtung 1 14, for example in the form of an inlet valve, from a fresh water line 1 12 through a detergent container 1 16, which may be formed, for example, as Einspülschale and conventional detergents and treatment additives, such as fabric softener, rinse aid,

Odor improver or other laundry treatment agent in various forms (liquid, gel, pasty or powder) may contain, either directly (as shown schematically in Figure 1) or via the tub 104 in the laundry drum 106 are introduced. The mixture of fresh water and detergent is referred to herein as washing liquor or liquor. For controlling the supply of fresh water, the dispenser 1 14 is also connected to the electronic control device 1 18. The tub 104 is provided at its lower end with a downwardly formed trough 128, which forms a heating chamber 130. In the heating chamber 130, an electric heating element 132 is arranged, preferably a tubular heater, with which the washing liquid in the tub 104 can be heated. To control the electric heating element 132, this is also with the electronic

Control device 1 18 connected, as shown schematically in Figure 1.

At the bottom of the trough 128 of the tub 104, a tub outlet 134 is provided, which is connected on the one hand to a transfer pump 120 and on the other hand to a pump-down 144.

The pumping device 120, which in particular serves to wash the laundry items 108 several times with the washing liquid, comprises a pump 122, a suction line 124 on the suction side and a pressure line 126 on the pressure side of the pump 122. By means of the pumping device 120, the washing liquid from the lower end of the tub 104 back into the laundry drum 106 on the laundry items 108 are recirculated. In this case, the washing liquid supplied via the pressure line 126 to the transfer pump device 120 is applied via a nozzle to the laundry items 108 in the laundry drum 106. For controlling the circulating pump 120, in particular the pump 122, this is also connected to the electronic control device 1 18, as shown schematically in Figure 1.

The pump-down device 144, which serves in particular to pump out washing liquid located in the tub 104 and to discharge it from the washing machine 100, comprises a pump 142 with a suction line 140 and a pressure line 146. For controlling the pump-down device 144, in particular the pump 142, this can also be used be connected to the electronic control device 1 18. An inventive embodiment of the electronic control device 1 18 and their interaction with the above-described components of

Laundry Applicator 100 will be described below in detail in the context of a laundry care process according to the invention with further reference to FIGS. 2 and 3

described.

Figure 2 shows a schematic diagram illustrating the time course of several sizes in a laundry care process according to the invention, namely the time course of the supplied via the dispenser 1 14 amount of water, the activity of the pump 122 of the pumping device 120, the speed of the laundry drum 106 and the temperature of the washing liquid. As the skilled person will recognize, the diagram shown in Figure 2 shows a Einspülphase the laundry care process in which in several temporally successive Einspülvorgängen the washing drum 106 fresh water or washing liquid is added, namely, as described above, from the fresh water line 1 12 on the Einspülvorrichtung 1 14 and the detergent container 1 16. The individual Einspülvorgänge are separated by periods in which the laundry drum 106 via the Einspülvorrichtung 1 14 no additional fresh water is added, ie the Einspülvorrichtung 1 14 deactivated or

closed is. According to the invention, the control device 1 18 is designed to control the drive motor 105 of the laundry drum 106 at the end of one of the rinsing processes of the laundry care program shown in FIG. 2, in which fresh water and detergent are flushed into the laundry drum 106 by means of the dispenser 1 14 Drive motor 105 reversibly drives the laundry drum 106 over a first reversing period, and after the drive motor 105 with the recirculation pump 120 deactivated, the laundry drum 106 during the first reversing period

Reversing period has reversed at least once, i. rotated in one direction of rotation and in the opposite direction of rotation, to activate the recirculation device 120 and deactivate 120 at the end of a second pumping period. It can the

Wash drum 106 are first brought to a speed of, for example 55 U / min in one direction of rotation and then to a speed of, for example, 55 U / min in the opposite direction of rotation. This ensures that in particular, the laundry items 108 resting on the inside of the laundry drum 106 are wetted with washing liquid via the jacket of the laundry drum 106.

In FIG. 2, the reversing of the laundry drum 106 can be recognized, for example, at the two peaks and valleys of the speed curve in front of the rest phases marked with the numbers "1", "2", "3" or "4". In FIG. 2, a second pumping period in which the pumping device 120 is active coincides in each case with a part of the periods indicated in FIG. 2 with the letters "B", "C", "D" and "E".

In a preferred embodiment, the control device 1 18 may be designed to, in the context of the temporally first flushing process shown in FIG

Einspülvorgänge essentially simultaneously the Einspülvorrichtung 1 14 and the

Activate pumping device 120. The corresponding first pumping period, over which the pumping device 120 is operated by the control device 18, is identified in FIG. 2 by the letter "A". The duration of the first pumping period marked in FIG. 2 with the letter "A" can only last a few seconds. In this case, the duration of the first pump-over period may be shorter than the duration of the first flush-in period.

The substantially simultaneous flushing and pumping ensures that previously undissolved detergent residues are further actively mixed with the washing liquid and less previously unresolved detergent residues in parts of the Wäschepflegeräts 100, in particular at the bottom of the tub 104 and / or in the tubular tub outlet 134, deposit , From practice it is known that the largest share of the detergent together with the first four liters of fresh water in the

Lye container 104 is flushed.

The control device 1 18 may further be adapted to drive the drive motor 105 of the laundry drum 106 such that during the second pumping period described above, the laundry drum 106 at least temporarily with

Starting speed is rotated. Such a rotation of the laundry drum 106 with

Applying speed is shown in Figure 2 in the period "D". The application speed may be, for example, in a range of about 80 to about 500 U / min. The rotation of the laundry drum 106 at this time, ie with simultaneous pumping, with Anlegedrehzahl causes the laundry items due to the centrifugal forces on the

Abut the inside of the laundry drum and the washing liquid introduced by the pumping device 120 into the laundry drum 106 strikes the casing of laundry items 108 resting on the inside of the laundry drum 106 directly. This ensures uniform wetting or moisture penetration of almost all laundry items 108 (even with full loading of the laundry drum 106). By the centrifugal forces occurring during the rotation with application speed, the washing liquid is also pressed out of the laundry items 108 and is about the active Umpumpvorrichtung 120 for another

Wetting the laundry items 108 of the laundry drum 106 fed again. In a preferred embodiment, both the first reversing period described above and the second pumping period described above end substantially simultaneously, as can be seen in Figure 2 the end of the respective periods "B", "C", "D" and "E" , In a preferred embodiment begins with the simultaneous end of a first Reversierzeitraums and a second

Pumping period a respective rest period. Four such rest periods are indicated in Figure 2 with the numbers "1", "2", "3" and "4". In a preferred embodiment, the dispenser 1 14 during the respective rest periods "1" to "4" inactive. In a preferred embodiment, the control means 1 18 is adapted, after the end of a first reversing period and a second pumping period, i. during a resting phase following the first reversing period and the second pumping period, for example the resting phases "1", "2", "3" or "4" shown in FIG. 2, the pressure of the washing liquid in the washing drum 106 or

To detect tub 104 and adjust based on this pressure parameters of running on the controller 1 18 laundry care program. This has, for example, the technical advantage that parameters of

Laundry care program can be adapted to the actual load, for example, to reduce energy consumption. For detecting the pressure of the washing liquid in the tub 104, for example, in the trough 128 of the tub 104, a pressure sensor may be provided, which communicates with the control device 1 18 in connection. FIG. 3 shows an exemplary schematic diagram which shows the time pressure curve for two different loadings, namely a full load and a half load, during a part of the rinsing phase shown in FIG

Laundry washing machine according to the invention in the form of a washing machine 100 (on the upper side) and a conventional washing machine (on the lower side). The uniform initially sharply rising and then flattening parts of the respective curve corresponding to the resting phases shown in Figure 2, wherein in Figure 3, two rest phases are shown. As can be seen from FIG. 3, in a laundry machine according to the invention in the form of a washing machine 100, which is operated as described above, a minimum pressure delta required for a load differentiation is reached at an earlier time t ₀ than in a conventional washing machine in which the a load differentiation required minimum pressure delta is reached only at a later time t ₀ '. An inventive washing machine 100 operated as described above thus allows a faster and better estimation of the load than conventional

Washing machines, which can reduce the overall duration of the laundry care program and the laundry care program faster and better adapted to the actual load, which in turn improves the washing result and energy consumption can be reduced. Alternatively or additionally, the control device 1 18 may be configured to operate the transfer pump device 120 during the second transfer pumping period such that the volume flow conveyed by the transfer pump device 120 is not less than a dripping rate of the laundry articles 108. This has, for example, the technical advantage that already at the beginning of by deactivating the

Drive motor 105 and Umpumpvorrichtung 120 initiated rest phase, for example, at the beginning of the rest phases shown in Figure 2 "1", "2", "3" or "4", the loading of the laundry care device 100 through the laundry items 108 based on the pressure of the washing liquid in the Lye container 104 can be estimated. Figure 4 is a schematic diagram illustrating the timing of multiple sizes in a laundry care process, namely, the timing of the pump 122 fluid pump 120 (ie, pump 122 on or off), the speed of the laundry drum 106, and the temperature of the wash fluid. By way of example, the control device 1 18 is designed to be part of the

With the heating element 132 activated, the laundry care program deactivates the transfer device 120 as soon as the amount of the washing liquid in the laundry drum 106 or the tub 104 falls below a minimum amount threshold value. As a result, for example, the advantage is achieved that an additional protection mechanism

is provided, which protects the heating element 132 from overheating.

In one embodiment, the controller 1 18 is adapted, as part of the laundry maintenance program, which provides phases in which the laundry drum 106 is rotated at a speed in the range of application speeds and the transfer device 120 is activated, the pumping device 120 when the speed of the Wash drum 106 to activate only when the speed of the laundry drum 106 exceeds a first speed threshold. FIG. 4 shows two such phases in which the laundry drum 106 is rotated at a speed in the range of application speeds and the pump-over device 120 is active. A detail view of the detail A of FIG. 4 is shown in FIG. Due to the exemplary embodiment, the pumping device 120 when starting the rotational speed of the laundry drum 106 to activate only when the speed of the laundry drum 106 exceeds a first speed threshold is

For example, the technical advantage achieved that can be ensured without great technical effort that in the tub 104, the amount of

Washing liquid is always large enough that the pump 122 of the transfer pump 120 can be operated smoothly, so in particular no air pulls. At speeds of the laundry drum 106 below the first speed threshold, it may happen that most of the wash fluid is bound in the laundry.

In one embodiment, the control device 1 18 is adapted to the

Umump device 120 when you shut down the speed of the laundry drum 106 then disable when the speed of the laundry drum 106 has a second

Speed threshold falls below. As a result, for example, the technical advantage is achieved that can be ensured without great technical effort that in the tub 104, the amount of washing liquid always large it is enough that the pump 122 of the transfer pump 120 can be operated without interference, so in particular no air pulls.

The first speed threshold may be equal to the second speed threshold. Research has shown that the first and / or the second

Speed threshold should preferably be greater than about 50 U / min. A

Applying speed may be, for example, in a range of about 80 to about 500 U / min.

In one embodiment, the control device 1 18 is adapted to the first and / or the second speed threshold continuously to the amount of

Washing liquid in the washing drum 106 and / or the tub 104

to adjust, wherein for a larger amount of the washing liquid, the first and / or the speed threshold value is lowered and for a smaller amount of the washing liquid, the first and / or the second speed threshold value is increased. As a result, for example, the technical advantage is achieved that the laundry care program can be better adapted to a respective wash cycle, which is essentially defined by the type and quantity of the laundry items 108.

In one embodiment, the laundry care device 100 further comprises a pressure sensor, which is designed to detect the pressure of the washing liquid in the laundry drum 106 or in the tub 104, wherein the control device 1 18 is designed to deactivate the pumping device 120 when the heating element 132 is activated as soon as the pressure detected by the pressure sensor falls below a pressure threshold. As a result, for example, the advantage is achieved that with technically simple means an additional protection mechanism is provided, which protects the heating element 132 against overheating.

In one embodiment, the control device 1 18 is configured to cycle a cycle in which the rotation of the laundry drum 106 is raised to an application speed and lowered again, the transfer device 120 above the first

Threshold activated and deactivated below the second speed threshold and the heating element 132 is activated to perform at least two times in a row. As a result, for example, the advantage is achieved that a More uniform temperature distribution in the washing liquid and the laundry items 108 is generated.

In one embodiment, the control device 1 18 is adapted to the cycle in which the rotation of the laundry drum 106 is raised to an application speed and lowered again, the transfer device 120 above the first

Threshold activated and deactivated below the second speed threshold and the heating element 132 is activated to repeat until a substantially uniform temperature distribution at a desired target temperature is reached. Thereby, for example, the advantage is achieved that a uniform temperature distribution in the washing liquid and the laundry items 108 is generated.

In one embodiment, once a substantially uniform temperature distribution at the desired target temperature is reached, the controller 1 18 is configured to deactivate the heater 132 and to at least once again ramp up the laundry drum 106 to an apply speed and down again, wherein above the first Speed threshold the

Umpumpvorrichtung 120 is activated and below the second speed threshold, the transfer device 120 is deactivated. Thereby, for example, the advantage is achieved that a uniform temperature distribution in the washing liquid and the laundry items 108 is generated.

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 description or shown in the figures. LIST OF REFERENCE NUMBERS

100 laundry care device

102 machine housing

104 tubs

105 drive motor

106 laundry drum

108 pieces of laundry

1 10 drivers

1 12 fresh water pipe

1 14 Einspülvorrichtung

1 16 detergent container

1 18 control device

120 pumping device

122 pump

124 suction line

126 pressure line

128 trough

130 heating chamber

132 heating element

134 Lye container drain

140 suction line

142 pump

144 pumping device

146 pressure line

Claims

Laundry care device (100) with a rotatably mounted laundry drum (106) for receiving laundry items (108), a drive motor (105) for rotating the laundry drum (106), a dispenser (1 14) for flushing

Fresh water and detergent in the laundry drum (106), a

Umpumpvorrichtung (120) for recirculating washing liquid from the

Laundry drum (106) out and back into the laundry drum (106) inside and a control device (1 18) for driving the drive motor (105), the Einspülvorrichtung (1 14) and the Umpumpvorrichtung (120) according to a in operation on the control device (1 18) running laundry maintenance program,

characterized in that

the control device (1 18) is designed to be at the end of a first

Einspülvorgangs the laundry care program in which by means of

Einspülvorrichtung (1 14) fresh water and detergent in the laundry drum (106) is flushed to drive the drive motor (105) of the laundry drum (106) such that the drive motor (105) reversibly drives the laundry drum (106) over a first reversing period, and , after the

Drive motor (105) the laundry drum (106) during the first

Reversing period reversed at least once, to activate the Umpumpvorrichtung (120) and to deactivate at the end of a second pumping period.

Laundry care appliance according to claim 1, characterized in that the

Control means (1 18) is adapted, in the context of the first

Injection process of the laundry care program to activate the Einspülvorrichtung (1 14) and disable at the end of the first Einspülzeitraums and

at the same time within a tolerance period with the activation of the

Einspülvorrichtung (1 14) to activate the Umpumpvorrichtung (120) and to deactivate at the end of a first pumping period. Laundry care device (100) according to claim 1 or 2, characterized in that it is the first flushing process of the laundry care program to the time first flushing the laundry care program.

Laundry care device (100) according to any one of the preceding claims, characterized in that the control device (1 18) is adapted to drive the drive motor (105) of the laundry drum (106) such that during the second pumping period, the laundry drum (106) at least temporarily with Starting speed is rotated.

Laundry care appliance (100) according to one of the preceding claims, characterized in that the end of the second pumping period within a tolerance period coincides with the end of the first reversing period.

Laundry care appliance (100) according to one of the preceding claims, characterized in that the control device (1 18) is designed to operate the transfer pump (120) during the second pumping period such that the volume flow delivered by the pumping device (122) is not less than is a drip rate of the laundry (108).

Laundry care appliance (100) according to one of the preceding claims, characterized in that the control device (1 18) is designed to detect the pressure of the washing liquid after the end of the first reversing period and the second pumping period and based on this pressure parameters of the on the Adjust control device running laundry care program.

A laundry care method for a laundry care device (100) with a rotatably mounted laundry drum (106) for receiving laundry items (108), a drive motor (105) for rotating the laundry drum (106), a

A flushing device (1 14) for flushing fresh water and detergent into the laundry drum (106), a recirculation device (120) for recirculating washing liquid from the laundry drum (106) out and back into the

Laundry drum (106) inside and a control device (1 18) for driving the drive motor (105), the Einspülvorrichtung (1 14) and the pumping device (120) according to a running in operation on the control device (1 18)

Laundry Care program,

characterized in that

the laundry care process comprises the steps of, by means of the control device (1 18) at the end of a first rinsing process of the laundry care program, in which fresh water and detergent is rinsed into the laundry drum (106) by means of the dispenser (1 14), the drive drum (105) of the laundry drum ( 106) in such a way that the drive motor (105) reversibly drives the laundry drum (106) over a first reversing period, and after the drive motor (105) turns on the laundry drum (106) during the first reversing period

9. laundry care method according to claim 8, wherein the control device (1 18) in

Frame of the first flushing process of the laundry care program the

Einspülvorrichtung (1 14) is activated and deactivated at the end of the first Einspülzeitraums and at the same time within a tolerance period with the activation of the Einspülvorrichtung (1 14), the Umpumpvorrichtung (120) is activated and deactivated at the end of a first pumping period.

10. laundry care method according to claim 8 or 9, characterized in that it is the first flushing process of the laundry care program to the time first flushing the laundry care program.

1 1. Laundry care method according to one of claims 8 to 10, characterized

in that the control device (1 18) controls the drive motor (105) of the laundry drum (106) such that during the second

Pumping period, the laundry drum (106) at least temporarily with

Starting speed is rotated.

12. laundry care method according to any one of claims 8 to 1 1, characterized

characterized in that the end of the second pumping period within a tolerance period coincides with the end of the first reversing period.

13. laundry care method according to any one of claims 8 to 12, characterized

characterized in that the control device (1 18) operates the circulating pump (120) during the second pumping period such that the one of the

Umpumpvorrichtung (122) delivered volume flow not smaller than one

Discharge rate of the laundry items (108) is.

14. laundry care method according to any one of claims 12 to 14, characterized

in that, after the end of the first reversing period and of the second pumping period, the control device (1 18) controls the pressure of the

Detects washing liquid and adjusts based on this pressure parameters of running on the control device laundry program.