EP3286369A1

EP3286369A1 - Laundry-care appliance comprising a metering system

Info

Publication number: EP3286369A1
Application number: EP16712022.9A
Authority: EP
Inventors: Bernd GEMÜNDEN; Hans Eglmeier
Original assignee: BSH Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2015-04-22
Filing date: 2016-03-23
Publication date: 2018-02-28
Anticipated expiration: 2036-03-23
Also published as: TR201911073T4; EP3286369B1; DE102015207342B4; DE102015207342A1; US20180135228A1; CN107532367B; RU2678559C1; PL3286369T3; US10570552B2; WO2016169721A1; CN107532367A

Abstract

The present invention relates to a laundry-care appliance (100) comprising a metering system (105) for metering a first liquid substance and a second liquid substance, wherein the metering system (105) comprises a first storage container (107) for providing the first liquid substance, a second storage container (109) for providing the second liquid substance, and a pump unit (112) which comprises a first pump head (113) and a second pump head (115). The metering system (105) comprises a common drive (129) for driving the first pump head (113) and the second pump head (115), wherein the common drive (129) can be driven in a first drive direction (137) and in a second drive direction (139). The first pump head (113) is designed in the case of the first drive direction (137) of the common drive (129) to convey the first liquid substance in a first conveying direction (149) from the first storage container (107). The second pump head (115) is designed in the case of the second drive direction (139) of the common drive (129) to convey the second liquid substance in a second conveyor direction (153) from the second storage container (109).

Description

Laundry care device with a dosing system

The present invention relates to a laundry care device with a metering system.

In order to ensure effective care of laundry in a conventional laundry care appliance, an amount of a liquid substance of the laundry in the

Laundry drum added. So that the user of the laundry care appliance does not have to manually add the liquid substance to the dispenser bowl of the laundry care appliance, laundry care appliances can have dispensing systems by means of which an automatic addition of liquid substance can be ensured.

DE 1 528 964 describes an adding device for washing machines or dishwashers which comprises a peristaltic pump.

It is the object underlying the invention to provide a laundry care device with an effective dosing system.

This object is achieved by articles having the features according to the independent claim. Advantageous embodiments of the invention are the subject of the drawings, the description and the dependent claims.

According to one aspect of the invention, the object is achieved by a laundry care device having a metering system for metering a first liquid substance and a second liquid substance, wherein the metering system comprises a first storage container for providing the first liquid substance, a second storage container for

Providing the second liquid substance, and comprising a pumping device having a first pump head and a second pump head, the dosing system having a common drive for driving the first pump head and the second pump head

Pump head comprises, wherein the common drive is drivable in a first drive direction and in a second drive direction, wherein the first pump head is formed in the first drive direction of the common drive, to convey the first liquid substance in a first conveying direction from the first reservoir, and wherein the second pump head in the second drive direction of the common drive is designed to promote the second liquid substance in a second conveying direction from the second reservoir.

As a result, the technical advantage is achieved that by the inventive

Dosing an effective dosage of liquid substance from the first, or from the second reservoir is made possible by only one common drive. In conventional multichannel dosing systems, a pump with a pump head is usually used per channel, which is operated in each case with a separate drive motor, drive gear and a coupling element. In the present invention, a cost-effective, compact dosing system for two channels is specified, the dosing system comprising the common drive installed in the laundry care device and the dosing device preferably to be taken from the laundry care device. The metering device in turn comprises the pumping device with the first pump head and the second pump head. The conveying direction of the pumping device, which has a reversible first pump head and a

reversible second pump head, can be replaced by a change

Change drive direction of the common drive advantageous. The two pump heads are mechanically parallel, ie connected with a single common drive. However, the two pump heads may be hydraulically anti-parallel connected, i. When driving the pumping device in the first drive direction of the first pump head acts suction on the connected first reservoir, wherein from the first

Reservoir is metered. The second pump head, however, acts in the first

Driving direction not sucking on the second reservoir, he runs, for example, empty.

By changing the drive direction in the second drive direction of

common drive the second pump head acts suction on the connected second reservoir, being metered from the second reservoir. The first pump head, however, acts in the second drive direction not sucking on the first reservoir, he runs, for example, empty.

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

In an advantageous embodiment of the laundry care device, the first

Pump head and the second pump head hydraulically anti-parallel connected, wherein the first conveying direction corresponds to the first drive direction, and wherein the second

Conveying direction of the second drive direction corresponds.

Thereby, the technical advantage is achieved that by the anti-parallel hydraulic circuit of the first pump head and the second pump head an effective

Dosing of only one liquid substance from one of the reservoir is made possible.

The common drive can operate the first pump head and the second pump head mechanically parallel, so that the first drive direction of the first

The conveying direction and the second drive direction of the second conveying direction corresponds. By the hydraulic anti-parallel circuit of the first pump head and the second

Pump head can be dosed in one drive direction only from one of the reservoir.

In an advantageous embodiment of the laundry care device, the first

Pump head and the second pump head hydraulically connected in parallel, the

Dosing system comprises a reversing gear for a drive direction change, which is connected between the common drive and the second pump head, wherein the first pump head in the first drive direction of the common drive in the first conveying direction is operable, and wherein the second pump head in the second drive direction of the common drive is operable in the second conveying direction.

This achieves the technical advantage that by using a

Reverse gear the same pump heads can be used for both channels. The first pump head and the second pump head can be hydraulically connected in parallel. The first pump head is opposite the first reservoir and the second

Pump head is connected to the second reservoir in the same hydraulic direction. That between the common drive and the second

Pump head switched reversing gear can change a drive direction carry out. As a result, the first pump head can be operated in the first drive direction in the first drive direction of the common drive and can be metered out of the first supply reservoir. The second pump head is at the second

Drive direction of the common drive in the second conveying direction operable and from the second reservoir can be dosed. Through the use of the reverse gear can be in a hydraulically parallel circuit of the first

Pump head and the second pump head in a drive direction of

common drive can be dosed only from one of the reservoir.

In an advantageous embodiment of the laundry care device, the common drive comprises a drive motor, wherein the drive motor is formed, the first

To drive the pump head and the second pump head, and wherein the drive motor in particular comprises an electric motor.

As a result, the technical advantage is achieved that an effective drive of the first pump head and the second pump head is ensured by the drive motor. The drive motor may in particular comprise an electric motor, e.g. a BLDC motor, and be electrically switchable in the drive direction. The drive motor is part of the common drive of the metering system and is connected to the pumping device of the

Dosing system brought into contact so that the drive motor can drive the pumping device effectively. By a suitable downstream of the drive motor coupling can be realized a coupling between the drive direction of the drive motor and the conveying direction of the first, and the second pump head. This makes it possible to realize an effective metering of liquid substance from the first or from the second storage container with only one drive motor.

In an advantageous embodiment of the laundry care device, the common drive comprises a drive gear, wherein the drive gear is designed to translate a torque of the drive motor, and the dosing system comprises a coupling element, wherein the coupling element is formed, the drive gear mechanically with the first pump head and with the second Couple pump head.

As a result, the technical advantage is achieved that an effective translation of the torque of the drive motor is achieved by the drive gear. Of the Drive motor and the drive gear are part of the common drive of the

Metering system. By coupling element, it is possible to couple the drive gear with the pumping device of the dosing. Thus, an effective coupling between the drive gear and the pumping device can be realized. In an advantageous embodiment of the laundry care appliance, this comprises

Drive gear a worm shaft.

As a result, the technical advantage is achieved by the training of the

Drive gear as worm shaft a particularly effective transmission of

Torque can be realized by the drive motor to the pumping device. In a worm shaft with only one right- or left-handed thread run on the same side of the worm shaft juxtaposed drive wheels under the condition that the pump heads point in the same direction, the same direction. In order to obtain a direction of rotation-selective pumping direction, the two must

Pump heads are symmetrical to each other, i. there are two different ones

Pumpheads before. To participate in this configuration with on the same side of

Worm shaft mounted drive wheels and a direction of rotation selective

Pumping effect same pump heads to use, two variants can be used. In the first variant, a simple screw shaft with only one right- or left-handed thread is used, the mating of the

Pump heads is made possible by lying on different sides of the screw drive wheels. In the second variant, a zoned worm shaft is used, wherein the worm shaft has a left-hand thread in the first zone and a right-hand thread in the second zone, or has a right-hand thread in the first zone and a left-hand thread in the second zone. In the second variant, the first pump head and the second pump head are arranged side by side on the same side of the worm shaft, and thus the first pump head and the second pump head can be made the same, which is an advantage in terms of ease

Design and the manufacturing cost of the pumping device represents.

In an advantageous embodiment of the laundry care device, the first pump head is designed to pump the first liquid substance with a first volume flow, and the second pump head is formed, the second liquid substance with a second Volume flow to pump, wherein the first and second volume flow is viscosity-dependent, and wherein the first volume flow and the second volume flow is greater than the volume flow when pumping air.

As a result, the technical advantage is achieved by the viscosity-selective

Volumetric flow of the pumping device, the supply of air is prevented in the reservoir.

If pumpheads include non-elastic components, leaks may occur. When conveying fluids, e.g. liquid substances, the fluid is continuously pushed back during the pumping by the back pressure generated during pumping at the output of the pump heads by the leaks in the pump heads, the pump power is reduced accordingly. Since viscous liquid substances having a high viscosity are used in laundry care appliances, the pressure which can be generated when conveying the viscous liquid substances is sufficient to allow efficient pumping of the liquid substance from the storage containers.

However, the viscosity of the sucked air is smaller by several orders of magnitude than the viscosity of the viscous liquid substances. When pumping air through the pumpheads, the pressure that can be generated when conveying air is not sufficient to supply air to the reservoirs, with the pump running idle without any delivery. This is particularly advantageous in oxygen-sensitive liquid substances or to counteract the drying out of the liquid substances in the storage containers.

In an advantageous embodiment of the laundry care device, the

Pumping a check valve or a float valve to reduce a backflow of liquid from the first reservoir or second reservoir.

As a result, the technical advantage is achieved that a hydraulic rectification of the pumping device can be ensured by the check valve. Depending on the direction of rotation, the pump delivers fluid or air. A float valve may differentiate between these two media due to the difference in density, which is also referred to as buoyancy. In the case of fluid, the valve closing body floats and releases the pipe; in the case of air it sinks and locks the pipe. Thus, at one Float valve the direction of action and the switching direction identical to the

Check valve. A float valve would allow the level in the pumphead to sink back to tank level with respect to the check valve after dosing. When equipped with valves pumping devices targeted leakage of the pump heads is necessary. Furthermore, through the check valve or the

Float valve when switching off the pumping device and a pressure drop in the first, or second substance line, the return flow can be reduced from the first or second reservoir. In particular, the check valve or the float valve is attached to the first, or to the second substance line, and is designed such that, when the pump heads are reversed, the first and second substance lines are closed in order to reduce the reflux of liquid substance in the substance line ,

In an advantageous embodiment of the laundry care appliance, this comprises

Dosing system a first dispensing element for dispensing the first liquid substance from the first reservoir to the laundry care device, and the dosing system comprises a second dispensing element for dispensing the second liquid substance from the second reservoir to the laundry care device, wherein the first dispensing element is disposed above the first reservoir, and the second one

Dispensing element is arranged above the second reservoir.

As a result, the technical advantage is achieved that the first, or the second

Delivery element is always higher than the liquid level of the liquid substance is arranged in the storage containers. As a result, an uncontrolled reflux of liquid substance from the first or from the second reservoir is prevented when the first and second pump heads are switched off. Especially in the presence of leaks in the first pump head and in the second

Pump head is such an arrangement advantageous to prevent unwanted leakage of the reservoir. In an advantageous embodiment of the laundry care appliance, the first pump head and the second pump head comprise a rotary piston pump, such as a

Gear pump, an eccentric screw pump, a scroll compressor or a Rotary vane pump, or a screw pump or a peristaltic pump, and in particular an eccentric screw pump.

As a result, the technical advantage is achieved that an efficient pumping of liquid substance from the first and second reservoir is made possible by said pump heads. Preference is given to pump heads with less moving components, compact and space-saving design, which can be advantageously integrated in the metering system.

In an advantageous embodiment of the laundry care device, the first pump head or the second pump head is designed in each case as an eccentric screw pump, wherein the respective eccentric screw pump comprises a rotor element and a stator, and wherein the rotor element is rotatably mounted in the stator.

This achieves the technical advantage that the use of a

Eccentric screw pump is particularly advantageous because progressing cavity pumps are easy and inexpensive to manufacture. An eccentric screw pump comprises a rotating part, the rotor element, and a fixed part, the stator, in which the rotor element rotates. In an advantageous embodiment of the laundry care device, the first pump head or the second pump head is designed in each case as a submersible pump.

Thereby, the technical advantage is achieved that an efficient pumping of liquid substance from the first and second reservoir is made possible by the submersible pump.

In an advantageous embodiment of the laundry care device, the first pump head with the first reservoir is through a first substance line, the second

Pump head connected to the second reservoir through a second fluid line, wherein the first and the second pump head form a peristaltic pump, wherein the peristaltic pump comprises a rotor with at least two pressure rollers, wherein at least one pressure roller to the first substance line and at least one

Contact roller with the second substance line is in contact. As a result, the technical advantage is achieved that an effective pumping of liquid substance or air through the substance lines is ensured by the hose pump. A peristaltic pump comprises a rotor with pressure rollers, which are in contact with the substance lines. The pressure rollers press here against the substance lines, thereby deforming the substance lines and cause a Abklemmstelle, which moves along the substance lines, thereby driving the liquid substance, or the air in the substance lines. The first and second pump heads form the peristaltic pump. This is achieved by passing the first substance line on one side of the rotor and the second substance line on the other side of the rotor. At least one pressure roller of the rotor is in each case in contact with one of the substance lines, so that always one each

Abklemmstelle in the first and in the second substance line is present, thereby preventing liquid substance flows back into the substance lines. In a circular movement of the rotor by the respective one pressure roller the

Abklstellenstelle in the first and the Abklemmstelle in the second substance line moves in a different direction, so that is conveyed through the first and through the second substance line liquid substance, or air in opposite directions. By switching the rotational direction of the rotor, the

Modification direction in the first and second substance line to be changed. The rotor preferably comprises three, four or five contact rollers.

In an advantageous embodiment of the laundry care appliance, this comprises

Laundry care device at least one level sensor for detecting a level of the first liquid substance in the first reservoir and for detecting a

Level of the second liquid substance in the second reservoir.

As a result, the technical advantage is achieved that an effective detection of the levels of the liquid substances in the storage containers is ensured by the level sensor. In particular, the level sensor is disposed on the laundry machine and is adapted to detect liquid substance exiting the metering system, e.g. through a photocell. The first and the second pump head pump in a known riser cross section in each case in a known

Relationship between the total angle of rotation and the volume delivered, in particular proportional, ie volume per height, an amount proportional to the total rotation angle. The pump head pumps a quantity proportional to the total angle of rotation. When starting the pumping device first fill the riser. From the known

Riser cross section, d. H. its cross-section as a function of the rise height, and the angle of rotation until the appearance of the fluid at the outlet can be closed to the start level in the riser. If the rotation angle of the pump head is proportional to the time, with a constant speed of the pump is preferred, or the course of the rotation angle over time is known, can be concluded by a time measurement to the start level in the riser. Due to the leaks in the pump heads, the levels in the riser pipe or in the pump heads are equalized some time after the last dosing process, so after the adjustment time the level is an inferior to the level in the pump head

Reservoir possible. Thus, by detecting the time interval between the beginning of the pumping operation and the beginning of the leakage of the liquid substance from the metering system on the level of the liquid substance in the first, and in the second reservoir, close.

In an advantageous embodiment of the laundry care appliance, this comprises

Laundry-care device a shaft with a Einspülschale, and includes the

Dosing a metering device, wherein the Einspülschale is formed to receive the metering device.

As a result, the technical advantage is achieved that an effective recording of the metering device is ensured by the laundry care device through the dispenser.

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 representation of a laundry care device;

Fig. 2 is a schematic representation of a dosing system; Fig. 3 is a schematic representation of a metering system; Fig. 4 is a schematic representation of a metering system with reverse gear;

Fig. 5 is a schematic representation of a peristaltic pump; and Figure 6 is a schematic representation of a worm shaft in contact with a first and a second pump head.

1 shows a schematic view of a washing machine representative of a general laundry care device 100. The laundry care device 100 comprises a shaft 101 with an induction bowl, into which detergent or other liquid substances can be introduced. The laundry care device 100 comprises a door 103 for

Loading the laundry care device 100 with laundry.

Fig. 2 shows a schematic representation of a metering system. The metering system 105 comprises a metering device 1 1 1 with a first reservoir 107 for

Providing a first liquid substance and a second reservoir 109 for providing a second liquid substance. The first and second liquid substances can be selected from the group consisting of cleaning agents, detergents,

Disinfectant, fabric softener and bleach are selected. The

Dosing 1 1 1 is in the dispenser tray in the well 101 of

Laundry care device 100 is inserted.

The metering device 1 1 1 further comprises a pumping device 1 12 with a first pump head 1 13 and a second pump head 1 15. The first pump head 1 13 is connected to the first reservoir 107 by a first substance line 1 17. The second pump head 1 15 is connected to the second reservoir 109 by a second substance line 1 19. The first pump head 1 13 is connected to a first

Dispensing element 121 connected by a first dispensing line 123. The second

Pump head 1 15 is connected to a second discharge element 125 through a second

Dispense line 127 connected.

The dosing system 105 further comprises a common drive 129, which comprises a drive motor 131 and a drive gear 133. The dosing system 105 comprises Further, a coupling element 135, which is arranged between the common drive 129 and the metering device 1 1 1, and which is designed to connect the common drive 129 with the metering device 1 1 1 mechanically.

In the present case, the drive motor 131 of the common drive 129 moves in a first drive direction 137, wherein the torque is passed through the drive gear 133 and the coupling element 135 to the pumping device 1 12 of the metering device 1 1 1, whereby the first pump head 1 13 and the second pump head 1 15 are moved in a first conveying direction. In the first conveying direction, the first pump head 1 13 pumps the first liquid substance from the first storage container 107 through the first substance line 1 17 and through the first discharge line 123 to the first delivery element 121. When the metering device 1 1 1 is in the dispenser shell of the laundry care device 100, the first liquid substance can be dispensed to the laundry care device 100.

In the first conveying direction, the second pump head 1 15 sucks in air through the second discharge element 125 and through the second discharge line 127 and guides the air, e.g. through the second substance line 1 19 the second reservoir 109 to or the second pump head 1 15 runs empty. The air may be introduced into the second liquid substance in the second reservoir 109.

FIG. 3 shows a schematic representation of a metering system according to FIG. 2. The metering system 105 comprises a metering device 11 with a first storage container 107, a second storage container 109 and lines, and a pumping device 12 with a first pump head 11 and a second pump Pump head 1 15 of FIG. 2.

The dosing system 105 comprises a common drive 129 according to FIG. 2.

In the present case, the drive motor 131 of the common drive 129 moves in a second drive direction 139, wherein the torque is passed through the drive gear 133 and the coupling element 135 to the pumping device 1 12, whereby the first pump head 1 13 and the second pump head 1 15 in a second conveying direction to be moved. In the second conveying direction, the first pump head 1 13 sucks air through the first delivery element 121 and through the first delivery line 123 and leads the air, for example through the first substance line 1 17 to the first reservoir 107, or the first pump head 1 13 runs empty. In the second conveying direction, the second pump head 1 15 pumps the second liquid substance from the second reservoir 109 through the second substance line 1 19 and through the second discharge line 127 to the second

Dispensing element 125. When the metering device 1 1 1 is in the dispenser shell of the laundry care device 100, thereby the second liquid substance can be delivered to the laundry care device 100. The drive motor 131, e.g. Electric motor, such as BLDC motor can be easily electrically switch in the drive direction 137, 139, which also changes the conveying direction of the pumping device 1 12 ,. The first pump head 13 and the second pump head 15 are mechanically connected in parallel, i. they are driven by a single common drive 129. The first and second pump head 1 13, 1 15 are hydraulically connected in anti-parallel. In a conveying direction acts a pump head 1 13, 1 15, sucking on the connected reservoir 107, 109, from this

Reservoir 107, 109 is metered. The other pump head 1 13, 1 15 simultaneously runs in the opposite direction, i. it is e.g. Air from the outside of the

Laundry care device 100 sucked, or the other pump head 1 13, 1 15 runs empty. Using a suitable, the common drive 129 downstream mechanical or hydraulic rectification, the pumping device 1 12 can be used with only one motor selectively for dosing.

In order to avoid the introduction of air into the storage containers 107, 109, leaks in the first pump head 13 and the second pump head 15 can advantageously be utilized. Through the use of non-elastic components in conventional pumping devices 1 12 minimal leaks occur, wherein the fluid during pumping by the generated during pumping back pressure at the output of the pump continuously through the leaks in the pump

is pushed back and the pump power is reduced accordingly. Because in

Laundry Care Equipment 100 viscous liquid substances used with a high viscosity is the pressure that can be generated when pumping the viscous liquid Substances sufficient to allow effective pumping of the liquid substance from the storage containers 107, 109.

However, the viscosity of the sucked air is smaller by several orders of magnitude than the viscosity of the viscous liquid substances. When pumping air through the pumping device 1 12, the pressure that can be generated when conveying air is not sufficient to supply air to the storage containers 107, 109, the pump running empty without conveying anything. This is particularly advantageous in the case of oxygen-sensitive liquid substances or to counteract the drying out of the liquid substances in the storage containers 107, 109.

When using minimally leaky pumping devices 12, the first or second delivery element 121, 125 may be disposed above the first and second storage containers 107, 109, respectively, to prevent undesirable leakage of the storage containers 107, 109 upon a pressure drop.

4 shows a schematic representation of a metering system according to FIG. 2 or FIG. 3 with a reversing gear. The metering system 105 comprises a metering device 11 with a first storage container 107, a second storage container 109, a first substance line 17, a second substance line 19, a first delivery element 121, a first delivery line 123, a second delivery element 125, a second delivery line 127 and a pumping device 1 12 with a first pump head 1 13 and a second pump head 1 15. In the pumping device 1 12 are the first

Pump head 1 13 and the second pump head 1 15 hydraulically connected in parallel. The dosing system 105 comprises a common drive 129 according to FIG. 2 and FIG. 3.

The metering device 1 1 1 further comprises a reversing gear 140, which is connected between the common drive 129 and the second pump head 1 15, wherein the reversing gear 140 is formed to perform a drive direction change.

The common drive 129, the pumping device 1 12 in a first

Drive direction drive 137 or in a second drive direction 139, wherein the Reverse gear 140 a drive direction change for the second pump head 1 15 performs.

The first conveying direction corresponds to the first drive direction 137 of the common drive 129. In the first conveying direction, the first pump head 1 13 pumps the first liquid substance from the first storage container 107 through the first substance line 1 17 and through the first discharge line 123 to the first delivery element 121. By reversing the drive direction through the reversing gear 140 sucks the second pump head 1 15 in the first drive direction 137 of the common drive 129 air through the second delivery element 125 or runs the second pump head 1 15 empty.

When the common drive 129 is operated in a second drive direction 139, the first pump head 1 13 in the second drive direction 139 of the common drive 129 sucks air through the first delivery element 121 or the first pump head 1 13 runs empty. By reversing the drive direction through the reverse gear 140, the second pump head 15 pumps the second liquid substance from the second reservoir 109 through the second substance line 1 19 and through the second discharge line 127 to the second discharge element 125 in the second conveying direction.

Fig. 5 shows a schematic representation of a peristaltic pump. In the peristaltic pump 141, the first and the second pump head 1 13, 1 15 in a component

summarized. The peristaltic pump 141 comprises a rotor 143 with three

Pressure rollers 145, wherein at least one pressure roller 145 with the first substance line 1 17 and at least one pressure roller 145 with the second substance line 1 19 is in contact.

By a rotation of the rotor 143 in a first rotational direction 147 liquid substance or fluid from the first reservoir 107 is pumped in a first conveying direction 149 through the first substance line 1 17. At the same time, in the first

Direction 149 air sucked from the environment of the laundry care device 100 through the second substance line 1 19 and the second reservoir 109 is supplied.

By a rotation of the rotor 143 in a second direction of rotation 151 in the second conveying direction 153 air from the environment of the laundry care device 100 through the first Substance line 1 17 sucked and fed to the first reservoir 107.

At the same time in the second conveying direction 153 liquid substance or fluid from the second reservoir 109 in the second conveying direction 153 through the second

Substance line 1 19 pumped. Alternatively, a peristaltic pump 141 may also include a first peristaltic pump unit, which is in contact exclusively with the first substance line 1 17, and a further peristaltic pump unit, which is in contact exclusively with the second substance line 1 19, wherein the first and the second

Peristaltic pump unit are arranged one above the other. By using a peristaltic pump 141 with a peristaltic pump unit with respect to a peristaltic pump 141 with two peristaltic pump units, the advantage of higher compactness can be achieved.

It can be used as an alternative to a peristaltic pump 141 pumps that make do with as few moving components are compact and can be advantageously integrated into the dosing system 105, such. a rotary pump, such as a gear pump, an eccentric screw pump, a scroll compressor or a rotary vane pump, or a screw pump or a hose pump 141, and in particular an eccentric screw pump.

Fig. 6 shows a schematic representation of a worm shaft with a first and a second pump head. The drive motor 131 drives a drive gear 133, which is designed as a worm shaft and is in contact with the drive wheel of the first pump head 13 and with the drive wheel of the second pump head 15. The first reservoir 107 and the second reservoir 109 of the

Dosing system 105 are shown in Fig. 5. The drive motor 131 and the

Drive gear 133, in particular the worm shaft, are designed to drive the first pump head 1 13 and the second pump head 15 in a first direction of rotation 147. By switching the drive direction 137, 139 of the drive gear 133, in particular the worm shaft, the first pump head 1 13 and the second pump head 1 15 can be driven in a second direction of rotation 151. When using the same pump heads 1 13, 1 15 run the first and second pump head 1 13, 1 15 against each other, while using different pump heads 1 13, 1 15, such as mirror-image shaped pump heads 1 13, 1 15, concurrently pumping the first 12 are possible with different flow directions. Thus, a driving of the first and second pump head 1 13, 1 15 by a worm shaft is advantageous.

It is a simple cost-effective and space-saving solution of a dosing system 105 for two liquid substances with possibility of selecting one of the reservoir 107, 109 by selecting the direction of rotation of the drive motor 131 allows. By

Use of two independent pump heads 1 13, 1 15 is none

Cross contamination of the liquid substances in the reservoirs 107, 109. Only a drive motor 131 with a drive gear 133 is required.

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

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

LIST OF REFERENCE NUMBERS

100 laundry care device

101 shaft

103 door

105 dosing system

107 First storage tank

109 Second storage tank

1 1 1 dosing device

1 12 pumping device

1 13 First pump head

1 15 Second pump head

1 17 First substance line

1 19 Second substance line

121 First delivery element

123 First delivery line

125 second delivery element

127 Second delivery line

129 Shared drive

131 drive motor

133 drive gear

135 coupling element

137 First drive direction

139 Second drive direction

140 reverse gear

141 peristaltic pump

143 rotor

145 pressure roller

147 First direction of rotation of the pump

149 First funding direction

151 Second direction of rotation of the pump

153 Second funding direction

Claims

A laundry care apparatus (100) comprising a dosing system (105) for dosing a first liquid substance and a second liquid substance, the dosing system (105) comprising a first storage container (107) for providing the first liquid substance, a second storage container (109). for providing the second liquid substance, and a pump device (1 12) having a first pump head (1 13) and a second

Pump head (1 15) comprises, characterized in that

the metering system (105) comprises a common drive (129) for driving the first pump head (1 13) and the second pump head (1 15), wherein the common drive (129) in a first drive direction (137) and in a second

Drive direction (139) is drivable; that

the first pump head (1 13) in the first drive direction (137) of the

common drive (129) is adapted to promote the first liquid substance in a first conveying direction (149) from the first storage container (107), and that

the second pump head (1 15) is formed in the second drive direction (139) of the common drive (129), the second liquid substance in a second

Promote conveying direction (153) from the second reservoir (109).

2. laundry care device (100) according to claim 1, characterized in that the first pump head (1 13) and the second pump head (1 15) are hydraulically connected in anti-parallel, that the first conveying direction (149) of the first drive direction (137) , and that the second conveying direction (153) corresponds to the second driving direction (139).

3. laundry care device (100) according to claim 1, characterized in that the first pump head (1 13) and the second pump head (1 15) are hydraulically connected in parallel, and that the metering system (105) is a reverse gear (140) for a

Drive direction change includes, which is connected between the common drive (129) and the second pump head (1 15), so that the first pump head (1 13) in the first drive direction (137) of the common drive (129) in the first conveying direction (149 ) Is operable, and that the second pump head (1 15) in the second drive direction (139) of the common drive (129) in the second

Conveying direction (153) is operable.

4. laundry care device (100) according to any one of the preceding claims, characterized in that the common drive (129) comprises a drive motor (131), wherein the drive motor (131) is formed, the first pump head (1 13) and the second pump head ( 1 15) to drive, and wherein the drive motor (131) in particular comprises an electric motor.

5. laundry care device (100) according to any one of the preceding claims, characterized in that the common drive (129) comprises a drive gear (133), wherein the drive gear (133) is formed, a torque of

Drive motor (131) translate, and that the dosing (105) a

Clutch element (135), wherein the coupling element (135) is adapted to mechanically couple the drive gear (133) with the first pump head (1 13) and the second pump head (1 15).

6. laundry care device (100) according to claim 5, characterized in that the drive gear (133) comprises a worm shaft.

7. laundry care device (100) according to any one of the preceding claims, characterized in that the first pump head (1 13) is adapted to pump the first liquid substance with a first volume flow, that the second pump head (1 15) is formed, the second to pump liquid substance with a second volume flow, wherein the first or second volume flow is viscosity-dependent, and wherein the first volume flow and the second volume flow is greater than the volume flow when pumping air.

8. laundry care device (100) according to claim 7, characterized in that the pumping means (1 12) comprises a check valve or a float valve to a backflow of liquid from the first reservoir (107) or second

To reduce reservoir (109).

9. laundry-care device (100) according to any one of the preceding claims, characterized in that the dosing (105) comprises a first discharge element (121) for dispensing the first liquid substance from the first storage container (107) to the laundry care device (100), and that the dosing system (105) a second

Dispensing element (125) for dispensing the second liquid substance from the second storage container (109) to the laundry care device (100), wherein the first

Delivery member (121) above the first storage container (107) is arranged, and wherein the second discharge element (125) above the second storage container (109) is arranged.

10. laundry care device (100) according to any one of the preceding claims, characterized in that the first pump head (1 13) and the second pump head (15 1) a rotary piston pump, such as a gear pump, an eccentric screw pump, a scroll compressor or a rotary vane pump, or a screw pump or a peristaltic pump (141), and more particularly an eccentric screw pump.

1 1. A laundry care device (100) according to claim 10, characterized in that the first pump head (1 13) or the second pump head (1 15) each as a

Eccentric screw pump is formed, and that the respective

Eccentric screw pump comprises a rotor element and a stator, wherein the rotor element is rotatably mounted in the stator.

12, laundry care device (100) according to any one of the preceding claims, characterized in that the first pump head (1 13) or the second pump head (1 15) is in each case designed as a submersible pump.

13. laundry care device (100) according to any one of the preceding claims, characterized in that the first pump head (1 13) with the first reservoir (107) through a first substance line (1 17), that the second pump head (1 15) with the second Reservoir (109) through a second fluid line (1 19) is connected, that the first and the second pump head (1 13, 1 15) form a peristaltic pump (141), wherein the peristaltic pump (141) has a rotor (143) with at least two Pressure rollers (145), wherein at least one pressure roller (145) with the first substance line (1 17) and at least one pressure roller (145) with the second substance line (1 19) is in contact.

14. laundry care device (100) according to any one of the preceding claims, characterized in that the laundry care device (100) at least one level sensor for detecting a level of the first liquid substance in the first

Reservoir (107) and for detecting a level of the second liquid substance in the second reservoir (109).

15. laundry care device (100) according to any one of the preceding claims, characterized in that the laundry care device (100) has a shaft (101) with a

Einspülschale includes that the dosing (105) comprises a metering device (1 1 1), wherein the Einspülschale is formed to receive the metering device (1 1 1).