WO2017005390A1

WO2017005390A1 - Laundry care apparatus and laundry care method

Info

Publication number: WO2017005390A1
Application number: PCT/EP2016/059956
Authority: WO
Inventors: Rodrigo FERRAZ MAINA; Cornelia Witt
Original assignee: BSH Hausgeräte GmbH
Priority date: 2015-07-08
Filing date: 2016-05-04
Publication date: 2017-01-12
Also published as: CN107849777A; EP3320137A1; PL3320138T3; CN107849775B; PL3320137T3; EP3320138A1; CN107849775A; EP3320137B1; WO2017005391A1; EP3320138B1; CN107849777B

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 pumping device (120) for recirculating the washing liquid out of the inner tub (106) and back into the inner tub (106), a heating element (132) for heating the washing liquid, and a control device (118) for controlling the drive motor (105), the pumping device (120) and the heating element (132) 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 deactivate, when the heating element (132) is activated, the pumping device (120) as soon as the amount of washing liquid in the inner tub (106) falls below a minimum amount threshold value.

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. In order for a thorough and uniform as possible wetting or moistening the

To provide laundry with the washing liquid, it is e.g. From DE3401899A1 known to dissipate by means of a pumping device washing liquid from the laundry drum or a tub connected to the laundry drum and applied via a nozzle again on the laundry items in the laundry drum. DE3401899A1 also describes a heating element which is located at the bottom of the

Lye container is arranged and with which the washing liquid can be heated to a target temperature.

In the case of the washing machine described in DE3401899A1, however, the problem can arise that the heating element is exposed during a pumping operation and can be damaged. A solution to this problem is described in EP1204792B1. In the solution described in EP1204792B1, however, come technically

relatively expensive means for use. The published patent application DE 10 2013 106 091 A1 shows a washing method and a washing machine.

The published patent application EP 2 246 469 A1 shows a washing machine. The published patent application EP 0 464 776 A1 shows a protective mechanism for a

Heating element of 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 disadvantages described above, 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

Laundry-care device with a rotatably mounted laundry drum for receiving items of laundry, a drive motor for rotating the laundry drum, a recirculation device for recirculating washing liquid out of the laundry drum and back into the laundry drum, a heating element for heating the washing liquid and a control device for activating the drive motor, the Umpumpvorrichtung and the heating element according to a in operation on the

Control device running laundry maintenance program. In this case, the control device is designed to deactivate the circulating pump when the heating element is activated, as soon as the amount of washing liquid in the washing drum or in a

Lye container in which the laundry drum is rotatably mounted, under a

Minimum amount threshold falls. As a result, for example, the advantage is achieved that a protective mechanism is provided which protects the heating element from overheating by being always covered by a minimum amount of washing liquid.

In an advantageous embodiment, the control device is designed to provide, in the context of the laundry care program, the phases in which the

Drum is rotated at a speed in the range of application speeds and the Umpumpvornchtung is active, the Umpumpvornchtung when starting the speed of the laundry drum to activate only when the speed of the laundry drum exceeds a first speed threshold. As a result, for example, the technical advantage is achieved that can be ensured without great technical effort that in the laundry drum or a tub in which the laundry drum is rotatably mounted, the amount of washing liquid is always large enough that the pump operated Umpumpvornchtung trouble-free can be, so in particular no air pulls. At speeds of the laundry drum below the first speed threshold, it may happen that the majority of the washing liquid is bound in the laundry.

In an advantageous embodiment, the control device is designed to deactivate the Umpumpvornchtung when moving down the speed of the laundry drum when the speed of the laundry drum 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 laundry drum or a tub in which the

Drum drum is rotatably mounted, the amount of washing liquid is always large enough that the pump Umpumpvornchtung can be operated smoothly, 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 an advantageous embodiment, the control device is adapted to continuously adapt the first and / or the second speed threshold to the amount of washing liquid in the washing drum, wherein for a larger amount of the washing liquid, the first and / or the speed threshold is lowered and for a smaller amount the washing liquid of the first and / or the second

Speed threshold is increased. As a result, for example, the technical advantage is achieved that the laundry care program better to a respective wash, the essentially defined by the type and amount of garments that can be adjusted.

In an advantageous embodiment, the laundry care device further comprises a pressure sensor, which is adapted to the pressure of the washing liquid in the

Laundry drum or the tub in which the laundry drum is rotatably mounted to detect, wherein the control device is adapted to activated

Heating element to disable the pumping device 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 against overheating.

In an advantageous embodiment, the control device is adapted to a cycle in which the rotation of the laundry drum is raised to an application speed and lowered again, the transfer device above the first

Threshold activated and deactivated below the second speed threshold and the heating element is enabled 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 is generated.

In an advantageous embodiment, the control device is adapted to the cycle in which the rotation of the laundry drum is raised to an application speed and lowered again, the pumping device above the first

Threshold activated and deactivated below the second speed threshold and the heating element is activated, to be repeated until a substantially uniform temperature distribution at a desired target temperature is reached. As a result, for example, the advantage is achieved that a uniform temperature distribution is generated in the washing liquid and the laundry items. In one embodiment, once a substantially uniform temperature distribution at the desired target temperature has been reached, the controller is configured to deactivate the heating element and raise the rotation of the laundry drum at least once more to an apply speed and again down, above the first speed threshold, the

Umpumpvorrichtung is activated and below the second speed threshold, the transfer pump is deactivated. As a result, for example, the advantage is achieved that a uniform temperature distribution in the washing liquid and the

Laundry items is generated.

In one embodiment, it is provided that the control device is designed to operate the Umpump device continuously when the heating element is activated. That is to say, the pumping device is operated continuously until the amount of washing liquid in the washing drum drops below the minimum amount threshold value. This causes, for example, an efficient pumping over.

Continuously, the opposite means impulsive. So that means that the

Umpumpeinrichtung remains activated until the amount of washing liquid in the laundry drum falls below the Mindestmengenschwellenwert.

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 recirculation pump for recirculating

Washing liquid out of the laundry drum and back into the laundry drum, a heating element for heating the washing liquid and a

Control device for driving the drive motor, the pumping device and the heating element according to a running in operation on the control device

Laundry care program. In this case, the laundry care method comprises the step that the control device deactivates the circulating pump when the heating element is activated, as soon as the amount of washing liquid in the laundry drum or a

Lye container in which the laundry drum is rotatably mounted, under a

Minimum amount threshold falls. As a result, for example, the advantage is achieved that a protective mechanism is provided which protects the heating element from overheating.

In an advantageous embodiment, the control device activates as part of the laundry care program, which provides phases in which the laundry drum with a Rotating speed in the range of application speeds and the pumping device is active, the pumping device when starting the speed of the laundry drum only when the speed of the laundry drum exceeds a first speed threshold. As a result, for example, the technical advantage is achieved that can be ensured without great technical effort that in the laundry drum or a tub in which the laundry drum is rotatably mounted, the amount of washing liquid is always large enough that the pump operated Umpumpvorrichtung trouble-free can be, so in particular no air pulls. At speeds of the laundry drum below the first speed threshold, it may happen that the majority of the washing liquid is bound in the laundry.

In an advantageous embodiment, the control device deactivates the

Umpumpvorrichtung when lowering the speed of the laundry drum when the speed of the laundry drum falls below a second speed threshold.

As a result, for example, the technical advantage is achieved that can be ensured without great technical effort that in the laundry drum or a tub in which the laundry drum is rotatably mounted, the amount of

Washing liquid is always large enough that the pump of Umpumpvorrichtung can be operated smoothly, 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

In an advantageous embodiment, the control device adjusts the first and / or the second speed threshold continuously to the amount of washing liquid in the washing drum or the tub, wherein for a larger amount of

Washing liquid of the first and / or the speed threshold is lowered and for a smaller amount of the washing liquid of the first and / or the second

In an advantageous embodiment, the laundry care method further comprises the step of detecting the pressure of the washing liquid in the washing drum or the tub in which the laundry drum is rotatably mounted, wherein the control device deactivates the circulating device when the heating element is activated as soon as the detected pressure falls below a pressure threshold value falls. 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 against overheating.

In an advantageous embodiment, the control device carries out a cycle in which the rotation of the laundry drum is raised to an application speed and lowered again, the circulation pump above the first

Threshold activated and deactivated below the second speed threshold and the heating element is activated, at least two times in succession. As a result, for example, the advantage is achieved that a more even

Temperature distribution is generated in the washing liquid and the laundry items.

In an advantageous embodiment, the control device repeats the cycle in which the rotation of the laundry drum is raised to an application speed and lowered again, the circulation pump above the first

Threshold activated and deactivated below the second speed threshold and the heating element is activated until a substantially uniform temperature distribution at a desired target temperature is reached. As a result, for example, the advantage is achieved that a uniform

In one embodiment, the controller deactivates the heating element as soon as a substantially uniform temperature distribution at the desired target temperature is reached, and the rotation of the laundry drum is at least once again up and down to an application speed, wherein above the first

Threshold the pumping device is activated and below the second speed threshold, the transfer pump is deactivated. This will For example, the advantage achieved that a uniform temperature distribution is generated in the washing liquid and the laundry items.

In one embodiment, it is provided that the control device continuously operates the Umpumpeinrichtung with activated heating element. That is to say, the pumping device is operated continuously until the amount of washing liquid in the washing drum drops below the minimum amount threshold value. This causes, for example, an efficient pumping over.

Continuously, the opposite means impulsive. This means that the transfer device remains activated until the amount of washing liquid in the laundry drum falls below the minimum amount threshold value.

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 illustrating the timing of multiple sizes in a laundry care process; FIG.

FIG. 3 is a detailed view of a portion of the schematic diagram of FIG. 2; FIG. , 4 is an exemplary schematic diagram illustrating the timing of multiple sizes during a wash-in phase of a laundry maintenance process

illustrated; and FIG. 5 is an exemplary schematic diagram showing the time course of pressure for two different loadings during a flushing phase of a

Laundry care process in a laundry care device in the form of a

Washing machine according to an embodiment and a conventional

Washing machine illustrated.

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 during rotation of 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 introduced via the tub 104 in the laundry drum 106. 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 pumping 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 Triggering of the pumping device 144, in particular the pump 142, this may also 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

Wash care 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 is a schematic diagram illustrating the timing of multiple sizes in a laundry care method of the present invention, namely, the timing of the pump 122 pump operation 120 (i.e., pump 122 on or off), the speed of the laundry drum 106, and the temperature of the laundry drum 106

Washing liquid. According to the invention, 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 an advantageous embodiment, the control device 1 18 is designed to provide in the context of the laundry care program, the phases in which the

Laundry drum 106 is rotated at a speed in the range of application speeds and the pumping device 120 is to be activated, the circulating pump 120 when starting the speed of the laundry drum 106 to activate only when the speed of the laundry drum 106 exceeds a first speed threshold.

FIG. 2 shows two such phases in which the laundry drum 106 is rotated at a speed in the range of application speeds and the transfer pump device 120 is active. A detailed view of the detail A of FIG. 2 is shown in FIG. Due to the inventive design, the circulating pump 120 when booting the speed of the laundry drum 106 to activate only when the speed of the Wash 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 an advantageous embodiment, the control device 1 18 is designed to deactivate the pumping device 120 when moving down the speed of the laundry drum 106 when the speed of the laundry drum 106 a second

Speed threshold falls below. As a result, the technical advantage is also achieved, for example, 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 pumping 120 can be operated smoothly, so in particular no air pulls.

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

In an advantageous embodiment, the control device 1 18 is adapted to continuously adjust the first and / or the second speed threshold to the amount of washing liquid in the washing drum 106 and / or the tub 104, wherein for a larger amount of the washing liquid of the first and / or the speed threshold is lowered and for a smaller amount of the washing liquid of the first and / or the second speed threshold 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 an advantageous embodiment, the laundry care device 100 further comprises a pressure sensor, which is adapted to the pressure of the washing liquid in the

Wash drum 106 and to detect in the tub 104, wherein the

Control device 1 18 is designed to, when activated heating element 132 the

Circulating pump 120 to deactivate 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 an advantageous embodiment, the control device 18 is designed to activate a cycle in which the rotation of the laundry drum 106 is raised to an application speed and lowered again, the circulation pump 120 is activated above the first speed threshold and below the second

Speed threshold is disabled 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 an advantageous embodiment, the control device 18 is designed to activate the cycle in which the rotation of the laundry drum 106 is raised to an application speed and lowered again, the circulation pump 120 is activated above the first speed threshold and below the second

Speed threshold is disabled and the heating element 132 is activated to repeat until a substantially uniform temperature distribution at a desired target temperature is reached. As a result, 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.

Figure 4 shows a schematic diagram illustrating the time course of several sizes in a laundry care process, namely the time course of the supplied via the Einspülvorrichtung 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 person skilled in the art recognizes, the diagram shown in FIG. 4 shows a flushing-in phase of the laundry care process, in which fresh water or water flows through the washing drum 106 in a plurality of successive flushing processes.

Washing liquid is added, namely, as described above, from the fresh water line 1 12 via the dispenser 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 more fresh water is added, i. the Einspülvorrichtung 1 14 deactivated or

closed is.

By way of example, 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. 4, 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 against the inside of the laundry drum 106 are wetted with washing liquid via the jacket of the laundry drum 106. In FIG. 4, the reversing of the laundry drum 106 can be recognized, for example, at the two peaks and valleys of the speed curve before the rest phases marked with the numbers "1", "2", "3" or "4". In FIG. 4, 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. 4 with the letters "B", "C", "D" and "E".

In one embodiment, the control device 1 18 may be designed to activate the dispenser 1 14 and the recirculation device 120 essentially simultaneously at the same time as part of the time-first dispensing operation of the dispensing operations illustrated in FIG. 4. The corresponding first pumping period over which the

Umpumpvorrichtung 120 is operated by the control device 1 18 is marked in Figure 4 with the letter "A". The duration of the first pumping period marked with the letter "A" in FIG. 4 may only be 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 4 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 application speed causes the laundry items abut due to the centrifugal forces on the inside of the laundry drum and introduced by the pumping device 120 in the laundry drum 106 wash directly to the inside of the Laundry drum 106 adjacent jacket of laundry 108 hits. 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 one embodiment, both the first described above end

Reversing period as well as the above-described second pumping period substantially simultaneously, as can be seen in Figure 4 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 4 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 one embodiment, the controller 1 18 is adapted to operate 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. 4, the pressure of the washing liquid in the laundry drum 106 or the tub 104 is to be detected and on the basis of this pressure parameters of the on the

Adjust control device 1 18 running 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 the

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. 5 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 wash-in phase shown in FIG

Laundry care device in the form of a washing machine 100 according to one embodiment (on the upper side) and a conventional washing machine (on the lower side) represents. The uniform first strongly rising and then flattening parts of the respective curve corresponding to the resting phases shown in Figure 4, wherein in Figure 5, two rest phases are shown. As can be seen from FIG. 5, in a laundry machine in the form of a washing machine 100 according to an embodiment which is operated, for example, as described above, a minimum pressure delta required for a load differentiation is achieved at an earlier time t ₀ than in a conventional washing machine the required for a load differentiation minimum pressure delta is reached only at a later time t ₀ '. A washing machine 100 operated as described above thus allows a faster and better estimation of the

Loading as conventional washing machines, reducing the total duration of the

Laundry care program can be reduced 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 the Umpumpvorrichtung 120 initiated rest phase, for example, at the beginning of the rest phases shown in Figure 4 "1", "2", "3" or "4", the loading of the laundry care device 100 by the laundry items 108 based on the pressure of the washing liquid in the Lye container 104 can be estimated.

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

A laundry care device (100) having a rotatably mounted laundry drum (106) for receiving laundry items (108), a drive motor (105) for rotating the laundry drum (106), a recirculation device (120) for recirculating washing liquid out of the laundry drum (106) back in the

Laundry drum (106) inside, a heating element (132) for heating the

Washing liquid and a control device (1 18) for driving the

Drive motor (105), the recirculation device (120) and the heating element (132) according to a running in operation on the control device (1 18)

Laundry Care program,

characterized in that

the control device (1 18) is designed to deactivate the circulating pump (120) when the heating element (132) is activated, as soon as the quantity of the

Washing liquid in the laundry drum (106) under a

Minimum amount threshold falls.

The laundry care appliance (100) according to claim 1, wherein the control device (1 18) is adapted, in the context of the laundry care program, to provide phases in which the laundry drum (106) has a speed in the range of

Startup speeds is rotated and the Umpumpvorrichtung (120) is active, the pumping device (120) when starting the speed of the laundry drum (106) to activate when the speed of the laundry drum (106) exceeds a first speed threshold.

Laundry care device (100) according to claim 2, characterized in that the control device (1 18) is adapted to deactivate the Umpumpvorrichtung (120) when lowering the speed of the laundry drum (106) when the speed of the laundry drum a second speed threshold

below. A laundry care appliance (100) according to claim 2 or 3, characterized in that the control device (1 18) is adapted to the first and / or the second speed threshold to the amount of washing liquid in the washing drum (106), wherein for a larger amount the washing liquid of 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.

The laundry care device (100) according to any one of the preceding claims, characterized in that the laundry care device (100) further comprises a pressure sensor which is adapted to the pressure of the washing liquid in the

Detecting the washing drum (106), wherein the control device (1 18) is designed to deactivate the circulation pump (120) when the heating element (132) is activated as soon as the pressure detected by the pressure sensor falls below a

Pressure threshold drops.

Laundry care appliance (100) according to any one of the preceding claims, characterized in that the control device (1 18) is adapted to a cycle in which the rotation of the laundry drum (106) is raised to an application speed and lowered again, the pumping device (120) is activated above the first speed threshold and deactivated below the second speed threshold, and the heater (132) is activated to perform at least two times in a row.

Laundry care appliance (100) according to claim 6, characterized in that the control device (1 18) is adapted to repeat the cycle until a substantially uniform temperature distribution at a desired target temperature is reached.

A laundry care appliance (100) according to claim 5 or 6, characterized in that the control device (1 18) is designed, as soon as a substantially uniform temperature distribution at the desired target temperature is reached, disable the heating element (132) and the rotation of the laundry drum ( 106) at least once again up to an application speed and drive down again, wherein above the first speed threshold, the Umpumpvornchtung (120) is activated and below the second speed threshold, the Umpumpvornchtung (120) is deactivated.

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

Umpumpvornchtung (120) for recirculating washing liquid from the laundry drum (106) out and back into the laundry drum (106) inside, a heating element (132) for heating the washing liquid and a control device (1 18) for driving the drive motor (105) Umpumpvornchtung (120) and the heating element (132) according to a running in operation on the control device (1 18) laundry maintenance program,

characterized in that

the laundry care method comprises the step of the control device (1 18) with activated heating element (132) the Umpumpvornchtung (120) deactivated as soon as the amount of washing liquid in the laundry drum (106) under a

Minimum amount threshold falls.

10. laundry care method according to claim 9, characterized in that in

Framework of the laundry care program, which provides for phases in which the

Drum (106) is rotated at a speed in the range of application speeds and the Umpumpvornchtung (120) is active, the Umpumpvornchtung (120) when starting the speed of the laundry drum (106) to activate when the speed of the laundry drum (106) a first Speed threshold exceeds.

1 1. Laundry care method according to claim 10, characterized in that the

Control device (1 18) the Umpumpvornchtung (120) when switching down the speed of the laundry drum (106) then deactivated when the speed of the laundry drum falls below a second speed threshold.

12. laundry care method according to claim 10 or 1 1, characterized in that the control device (1 18) the first and / or the second

Speed threshold to the amount of washing liquid in the washing drum (106), wherein for a larger amount of the washing liquid, the first and / or the speed threshold is lowered and for a smaller amount of the washing liquid, the first and / or the second speed threshold is increased.

13. laundry care method according to one of claims 9 to 12, characterized

characterized in that the laundry care method further comprises the step of detecting the pressure of the scrubbing liquid in the laundry drum (106), wherein the control device (1 18) deactivates the recirculation device (120) when the heating element (132) is activated as soon as the pressure detected by the pressure sensor falls below a pressure threshold.

14. laundry care method according to any one of claims 9 to 13, characterized

characterized in that the control device (1 18) activates a cycle in which the rotation of the laundry drum (106) is raised to an application speed and down again, the transfer pump (120) above the first speed threshold and below the second

Speed threshold is disabled and the heating element (132) is activated, at least twice in a row performs.

15. laundry care method according to any one of claims 9 to 14, characterized

characterized in that the control means (1 18), as soon as a substantially uniform temperature distribution at the desired target temperature is reached, the heating element (132) is deactivated and the rotation of the laundry drum (106) at least once again up to an application speed and down again, wherein above the first speed threshold, the circulating pump (120) is activated and below the second speed threshold, the

Umpumpvorrichtung (120) is deactivated.