DE102018214137A1 - Laundry care device with an inlet nozzle - Google Patents

Abstract

The invention relates to a laundry care device (100) with a laundry drum (117) for receiving laundry, an appliance loading opening (113) on a front side (103) of the laundry care appliance (100), an appliance door (115) for closing the appliance loading opening (113), wherein the appliance door (115) has a door inside (143) facing the laundry drum (117), a tub (119) for holding washing liquid, the tub (119) having a drain opening (121), the laundry care device (100) having an inlet nozzle (123), the drain opening (121) being fluidically connected to the inlet nozzle (123) by a line (125), a line circulation pump (127) for pumping the washing liquid out of the drain opening (121) in the line (125) the line (125) and through the inlet nozzle (123), and a controller (133) for controlling the circulation pump (127). The circulation pump (127) is designed to pump washing liquid through the line (125) and through the inlet nozzle (123) in a first operating mode at a first flow speed in a first flow speed range in order to supply the washing liquid directly to the laundry in the laundry drum (117) , The circulation pump (127) is designed, in a second operating mode, to pump washing liquid at a second flow speed in a second flow speed range through the line (125) and through the inlet nozzle (123) in order to wash the washing liquid on the inside of the door (143) of the appliance door (115). and to remove impurities accumulated on the inside of the door (143), the first and second flow velocity ranges not overlapping, and the controller (133) being designed to activate the first and second operating modes of the circulation pump (127).

Description

The present invention relates to a laundry care device with an inlet nozzle, in particular a laundry care device with a pumping system and an associated inlet nozzle.

In conventional laundry care devices, pumping systems are used to pump washing liquid out of the tub by means of a circulation pump in order to feed the washing liquid again by means of the circulation pump through the pumping system of the laundry into the laundry drum. When pumping around the washing liquid, however, contaminants accumulated in the tub are also pumped around. Such contaminants pumped around with the washing liquid, e.g. Lint or foam residues, if necessary, can disadvantageously accumulate on the inside of the appliance door, which is usually provided with a window glass.

In the DE 44 47 160 A1 discloses a washing machine with a detergent dispenser.

In the DE 10 2014 220 020 A1 discloses a laundry care device with a deflecting element for deflecting wash liquor pumped out of the insertion opening into the tub.

It is the object on which the invention is based to specify a laundry care appliance with a pumping system in which the amount of impurities attached to the appliance door can be reduced.

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

According to one aspect, the object according to the invention is achieved by a laundry care device with a laundry drum for holding laundry, a device loading opening on a device front of the laundry care device, an appliance door for closing the device loading opening, the device door having an inside of the door facing the laundry drum, a tub for holding washing liquid, wherein the tub has a drain opening, the laundry care device has an inlet nozzle, the drain opening being fluidly connected to the inlet nozzle by a line, a circulation pump for pumping the washing liquid from the drain opening through the line and through the inlet nozzle being arranged in the line, and a controller for controlling the circulation pump, wherein the circulation pump is designed in a first operating mode washing liquid with a first flow rate in one pumping the first flow rate range through the line and through the inlet nozzle in order to supply the washing liquid directly to the laundry in the laundry drum, the circulation pump being designed to supply washing liquid with a second flow rate in a second flow speed range through the line and through the inlet nozzle in a second operating mode pump to supply the washing liquid to the inside of the appliance door and to remove impurities attached to the inside of the door, the first and second flow velocity ranges not overlapping, and the controller being designed to activate the first and second operating modes of the circulation pump.

This achieves the technical advantage that, depending on the selected first or second operating mode of the circulation pump, the pumped washing liquid either directly from the laundry in the laundry drum or the inside of the door to remove contaminants, e.g. Lint or foam residues that often remain after the spin cycle, despite the laundry care process.

Thus, the controller can activate the first operating mode of the circulation pump, in particular in the regular operation of the laundry care device, in order to effectively and directly supply the washing liquid to the laundry in the laundry drum, and can activate the second operating mode of the circulation pump, particularly during a cleaning phase of the laundry care device, in order to detect impurities to remove the inside of the door.

On the inside of the appliance door, in particular, there is a sleeve of the laundry care appliance. If the washing liquid directed to the inside of the appliance door drains away due to the force of gravity, the washing liquid flows in particular also over the surface of the cuff, so that the washing liquid can also rinse off contaminants deposited on the cuff or in cavities in the cuff.

The direction of exit of the washing liquid emerging from the inlet nozzle, in particular washing liquid jet, and thus also the point of impact of the washing liquid, in particular washing liquid jet, in the interior of the laundry care device is not only dependent on the position and orientation of the inlet nozzle, but also on the flow rate of the washing liquid, which is caused by the circulation pump is pumped through the pumping system, in particular the line. Thus, with a varying flow rate of the washing liquid in the line, the exit speed of the washing liquid emerging from the inlet nozzle also changes. With the same exit direction of the injection jet at the inlet nozzle, the different exit velocities result in different jet profiles or jet throwing parabolas due to gravity, which thus also generate different points of impact of the washing liquid in the interior of the laundry care device.

During a pumping operation, in particular the laundry drum is rotated, so that the laundry received in the laundry drum lies radially against the drum jacket due to the centrifugal force on the laundry drum and thereby forms a laundry ring which delimits a laundry tunnel. In the first operating mode of the circulation pump, the washing liquid pumped at a first flow rate can be directed, in particular, into the laundry tunnel in order to ensure a particularly uniform and thus complete wetting or flooding of the laundry in the laundry drum.

Here, the first flow rate from the first flow rate range is selected in time so that within certain limits a variation of the first flow rate within the first flow rate range is made possible in order to vary the impact of the washing liquid discharged from the inlet nozzle into the laundry tunnel.

During the second operating mode of the circulation pump, however, the washing liquid is pumped around at a second flow rate, which is selected from the second flow rate range. Since the second flow rate range does not overlap with the first flow rate range, the second flow rate is also different from the first flow rate.

Due to the second flow speed, which is different from the first flow speed, during the second operating mode of the circulation pump, the exit speed of the washing liquid emerging from the inlet nozzle, and thus the impact location of the washing liquid, can be effectively changed because, due to the speed, different jet falling parabolas occur despite the same nozzle exit direction due to gravity. Thus, during the second operating mode of the circulation pump, the washing liquid no longer hits the laundry in the laundry drum directly, but rather hits the washing liquid on the inside of the appliance door to rinse off dirt from the inside of the door. The second flow rate can also be varied in time in a second flow rate range such that different areas of the inside of the appliance door can be reached for cleaning purposes.

Thus, depending on the flow rate, the washing liquid can either be fed directly to the laundry in the laundry drum for effective wetting and / or flooding of the laundry or to the inside of the door for effective removal of contaminants.

In particular, the controller operates the circulation pump in the first operating mode at a first speed in order to pump washing liquid through the line at the first flow rate. In particular, the controller operates the circulation pump in the second operating mode at a second speed in order to pump washing liquid through the line at the second flow rate.

The appliance door of the laundry care device has, in particular, a window glass through which the user of the laundry care device can look into the interior of the laundry care device in order to follow a laundry care process.

A laundry care device is understood to be a device which is used for laundry care, such as a washer or dryer. Such a laundry care device is understood in particular to mean a household laundry care device. So a laundry care device, which is used in the context of housekeeping, and with which laundry is treated in normal household quantities.

In an advantageous embodiment of the laundry care device, the laundry care device has an actuating element which can be actuated by a user of the laundry care device, the controller being designed to activate the second operating mode of the circulation pump in response to actuation of the actuating element.

This achieves the technical advantage that the user can manually select the second operating mode of the circulation pump by actuating the actuating element, as a result of which the washing liquid emerging through the inlet nozzle can be effectively supplied to the inside of the appliance door in order to remove impurities attached to it. If, for example, the user visually detects the accumulation of contaminants on the inside of the door, the user can initiate the removal of the contaminants manually by actuating the actuating element.

In particular, the actuating element is designed as a program selection device for selecting a door cleaning program from a plurality of laundry care programs, the controller being designed to activate the second operating mode of the circulation pump in response to the selection of the door cleaning program.

In an advantageous embodiment of the laundry care device, the controller is designed to activate the first operating mode of the circulation pump during a first time interval, and the controller is designed to activate the second operating mode of the circulation pump during a second time interval following the first time interval.

This achieves the technical advantage that the second operating mode carried out during the second time interval is carried out after the first operating mode in order to remove contaminants accumulated during the first operating mode.

In an advantageous embodiment of the laundry care device, the control is designed to vary the first flow speed within the first flow speed range during the first operating mode of the circulation pump, in particular to vary it periodically in order to vary the impact of the washing liquid on the laundry, and / or the control is designed to vary the second flow rate within the second flow rate range during the second operating mode of the circulation pump, in particular to vary it periodically, in order to vary the point at which the washing liquid hits the inside of the appliance door.

This has the technical advantage that the particularly periodic variation of the impact of the washing liquid on the laundry ensures a particularly effective and complete wetting of the laundry, and that the particularly periodic variation of the impact of the washing liquid on the inside of the door results in a particularly large and complete area Removal of contaminants on the inside of the door can be ensured. In particular, the controller is designed to vary the respective flow rate within the respective flow rate range by varying a speed of a pump impeller of the circulation pump during the respective operating mode of the circulation pump.

In particular, the circulation pump is designed in the first and / or second operating mode to pump washing liquid with pump pressures that change periodically over time through the inlet nozzle, wherein the respective pump pressures that change periodically correspond in particular to a sinusoidal pump pressure change.

In an advantageous embodiment of the laundry care device, the circulation pump has a pump impeller for pumping washing liquid, the circulation pump being designed to rotate the pump impeller at a first speed in the first operating mode in order to pump washing liquid at the first flow rate, the circulation pump being designed to rotate the pump impeller at a second speed in the second operating mode in order to pump washing liquid at the second flow speed, the pump impeller rotating in particular in the same direction of rotation or in different directions of rotation in the first and second operating modes.

This has the technical advantage that the flow rate of the pumped washing liquid can be effectively adjusted by controlling the speed and / or direction of rotation of the pump impeller during the first and second operating modes of the circulation pump. Here, the first and second operating modes of the circulation pump can be distinguished in particular by the fact that the pump impeller rotates in the same direction of rotation at different speeds, or the first and second operating modes of the circulation pump can be distinguished in particular by the fact that the pump impeller rotates at different speeds in different directions of rotation ,

In an advantageous embodiment of the laundry care device, the second flow speed range is less than the first flow speed range, the second speed in particular being lower than the first speed.

This achieves the technical advantage that the second flow speed range, which is smaller and does not overlap compared to the first flow speed range, leads to the second flow speed also being lower than the first flow speed. Due to the lower second flow rate, the washing liquid can be effectively conducted to the inside of the door in the second operating mode of the circulation pump in order to remove impurities from the inside of the appliance door.

In an advantageous embodiment of the laundry care device, the inlet nozzle is formed, which emerges from the inlet nozzle Feed washing liquid with a parabolic curve of the laundry in the laundry drum or inside the door of the appliance door, in particular a first curve parabolic curve of the washing liquid in the first operating mode of the circulation pump being flatter than a second curve parabolic curve of the washing liquid in the second operating mode the circulation pump.

This achieves the technical advantage that the point of impact of the washing liquid on the laundry or on the inside of the door can advantageously be set by means of the parabolic shape of the washing liquid.

Gravity acts on the washing liquid emerging from the inlet nozzle, in particular the washing liquid jet, so that the washing liquid is deflected by gravity. During the first operating mode, the first flow rate of the washing liquid is in particular greater than the second flow rate of the washing liquid during the second operating mode, so that the corresponding first parabolic course of the washing liquid during the first operating mode is flatter than the corresponding second parabolic course of the washing liquid during of the second mode of operation.

The flatter parabola in the first operating mode arises due to the higher nozzle exit speeds in the first operating mode, because the higher speed results in the jet staying for a shorter time to the desired point of impact, so that the fall acceleration acting on the jet only lasts for a short period of time Can influence the beam geometry. The geometric deviation from the straight line is therefore smaller.

Thus, the pump speed variation can not only influence the beam geometry with regard to the curvature of the respective beam and the exact point of impact can be determined in advance, but also the angle of impact can be varied. Due to the variation of the angle of incidence, the technical advantage is achieved that the cleaning effect can also be influenced. Because if the cleaning jet hits the place to be cleaned as vertically as possible, the cleaning effect increases.

In an advantageous embodiment of the laundry care device, the laundry drum is rotatable about an axis of rotation, the axis of rotation extending from the front of the device to a rear of the laundry care device, the inlet nozzle being designed to discharge the washing liquid from the inlet nozzle along an injection axis in the first operating mode of the circulation pump, wherein the inlet nozzle is designed, in the second operating mode of the circulation pump, to discharge the washing liquid along the injection axis from the inlet nozzle, the injection axis extending at an angle to the axis of rotation of the laundry drum, and in particular a first angle of incidence between one that hits the laundry during the first operating mode Injection jet and the axis of rotation is smaller than a second angle of incidence between an injection jet and the inside of the door during the second operating mode the axis of rotation.

This achieves the technical advantage that the washing liquid can be supplied to the laundry particularly effectively due to the angular course of the respective injection axis relative to the axis of rotation, or can be directed particularly effectively to the inside of the appliance door, for example to improve the cleaning ability of the jet at the impact to maximize.

In an advantageous embodiment of the laundry care device, the inlet nozzle has a scattering element which is designed to scatter the washing liquid emerging from the inlet nozzle in order to supply a scattered washing liquid to the laundry in the laundry drum or inside the door of the appliance door.

This has the technical advantage that the scattered washing liquid can wet or clean a particularly large area of the laundry drum or the inside of the door.

In an advantageous embodiment of the laundry care device, the laundry care device has a drum drive for rotating the laundry drum, the drum drive being designed to drive the laundry drum at an application speed in order to engage the laundry received in the laundry drum with the laundry drum, in particular the cylindrical outer surface of the laundry drum to bring and thereby form a laundry tunnel within the laundry lying on the laundry drum, the inlet nozzle being designed to guide the washing liquid emerging from the inlet nozzle in the first operating mode of the circulation pump into the laundry tunnel inside the laundry lying on the laundry drum, the installation speed in particular covers a range of greater than 60 rpm.

This has the technical advantage that a particularly effective wetting and flooding of the laundry is ensured. The system speed relates in particular to commercially available laundry care devices Have laundry capacity of about 6 to 10 kg and a drum diameter of 400 mm to 550 mm.

In an advantageous embodiment of the laundry care device, the inside of the appliance door has a rear wall facing the laundry drum, the inside of the appliance door has a connecting area facing an outside of the appliance door, the inside of the door between the back wall and the connecting area has a stepped inside area against which the door the washing liquid striking the inside of the door can be sprayed on in order to guide the washing liquid along the surface of the stepped inside area of the door.

This achieves the technical advantage that the washing liquid that strikes and drains off the stepped inside area of the door can remove impurities particularly effectively from a large area of the inside of the door.

In an advantageous embodiment of the laundry care device, the inlet nozzle is arranged on an upper front side of the suds container, and the drain opening is arranged on an underside of the suds container, the inlet nozzle being arranged in particular on a sleeve of the laundry care device.

This achieves the technical advantage that the inlet nozzle can effectively deliver the washing liquid to the laundry or the inside of the door.

In an advantageous embodiment of the laundry care device, an injection channel is formed between the cuff and the appliance door, the inlet nozzle being arranged to guide the washing liquid emerging from the inlet nozzle, in particular in the first operating mode of the circulation pump, through the injection channel.

This has the technical advantage that the injection channel enables an effective supply of washing liquid.

In an advantageous embodiment of the laundry care device, the line has a feed section which is fluidically connected to the inlet nozzle, the inlet nozzle extending in particular at an angle to the feed section.

This achieves the technical advantage that the washing liquid discharged through the inlet nozzle can be supplied particularly effectively through the arrangement of the inlet nozzle with respect to the feed section.

According to a second aspect of the invention, the object is achieved by a method for maintaining laundry in a laundry care device, the laundry care device comprising a laundry drum for receiving laundry, a device loading opening on a front of the laundry care device, a device door for closing the device loading opening, the device door being a the inside of the door facing the washing drum, a tub for receiving washing liquid, the tub having a drain opening, the laundry care device having an inlet nozzle, the drain opening being fluidically connected to the inlet nozzle by a line, a circulation pump for pumping the washing liquid in the line is arranged from the drain opening through the line and through the inlet nozzle, and has a controller for controlling the circulation pump, the method comprising the following steps, activating a nes first mode of operation of the circulation pump by the controller for pumping washing liquid at a first flow rate in a first flow rate range through the line and through the inlet nozzle to supply the washing liquid to the laundry directly in the laundry drum, and activating a second mode of operation of the circulation pump by the controller for Pumping wash liquid at a second flow rate in a second flow rate range through the conduit and through the inlet nozzle to deliver the wash liquid to the inside of the appliance door and to remove contaminants attached to the inside of the door, the first and second flow rate ranges not overlapping.

This achieves the technical advantage that the washing liquid can be effectively supplied to either the laundry or the inside of the door. In particular, the controller operates the circulation pump in the first operating mode at a first speed in order to pump washing liquid through the line at the first flow rate. In particular, the controller operates the circulation pump in the second operating mode at a second speed in order to pump washing liquid through the line at the second flow rate.

In an advantageous embodiment of the method, the laundry care device has an actuating element which can be actuated by a user of the laundry care device, and the activation of the second operating mode of the circulation pump is carried out by the control in response to the actuation of the actuating element.

In an advantageous embodiment of the method, the first becomes during the first operating mode of the circulation pump Flow rate varies within the first flow rate range, in particular varies periodically in order to vary the point of impact of the washing liquid on the laundry, and / or during the second operating mode of the circulation pump, the second flow rate is varied within the second flow rate range, in particular varying periodically, in order of the point of impact of the washing liquid to vary on the inside of the appliance door.

• 1 eine schematische Ansicht eines Wäschepflegegeräts;
• 2 eine schematische Ansicht eines Wäschepflegegeräts mit einem Umpumpsystem;
• 3 eine perspektivische Schnittdarstellung eines Wäschepflegegeräts mit einer Einlassdüse; und
• 4 eine schematische Darstellung eines Verfahrens zum Pflegen von Wäsche in einem Wäschepflegegerät.

Further exemplary embodiments are explained with reference to the attached drawings. Show it:

• 1 a schematic view of a laundry care device;
• 2 a schematic view of a laundry care device with a pumping system;
• 3 a perspective sectional view of a laundry care device with an inlet nozzle; and
• 4 is a schematic representation of a method for maintaining laundry in a laundry care device.

1 shows a schematic view of a general laundry care device 100 , such as a washing machine. The laundry care device 100 includes a induction bowl 101 , can be poured into the detergent, such as detergent. The laundry care device 100 has a front panel 103 , a rear panel 105 , Long sides of the device 107 , an underside of the device 109 and a device top 111 on. On the front of the device 103 of the laundry care appliance 100 is a device loading opening 113 arranged which through an appliance door 115 is lockable to the laundry care device 100 to load with laundry.

2 shows a schematic view of a laundry care device with a pumping system. That in the 2 Pump system shown of the laundry care device 100 includes a laundry drum 117 to hold laundry, a tub 119 for receiving washing liquid, which has a drain opening 121 has, and wherein the laundry care device 100 an inlet nozzle 123 having. The inlet nozzle 123 and the drain opening 121 are through a wire 125 fluidly connected, being in the line 125 a circulation pump 127 is arranged, which is formed washing liquid through the drain opening 121 from the tub 119 in the line 125 to pump and the pumped washing liquid out of the line 125 through the inlet nozzle 123 the laundry drum 117 supply. In the 2 is also a drum drive 129 shown, which is designed the laundry drum 117 via a drive connection 131 drive. The laundry care device 100 has a control 133 on which with the drum drive 129 through a first control connection 135 and with the circulation pump 127 through a second control connection 137 connected is.

When the laundry drum is fully loaded 117 can through the inlet nozzle 123 in the laundry drum 117 Bounce the injected washing liquid from the laundry so that access to the inside of the washing tunnel is blocked, and the washing liquid into the tub 119 can run back without completely flooding the laundry. When the laundry drum 117 The laundry rotates very quickly due to the centrifugal forces that occur against the laundry drum 117 pressed, creating a laundry tunnel in the laundry drum 117 forms. The washing liquid is supplied by the circulation pump 127 through the line 125 to the inlet nozzle 123 pumped. Then it must be ensured that the through the inlet nozzle 123 pumped out washing liquid the laundry tunnel of the laundry in the rotating laundry drum 117 advantageous. This can ensure that, due to the centrifugal forces that occur, the laundry is advantageously flooded in the laundry drum 117 in a radial direction directed outwards from the laundry tunnel from the inside out.

3 shows a perspective sectional view of a laundry care device with an inlet nozzle. In the in 3 selected representation is a side longitudinal section of a laundry care device 100 shown in the loaded state during the pump-around injection process. In 3 is the top of the device 111 and the front of the device 103 of the laundry care appliance 100 shown schematically. On the front of the device 103 is a device loading opening 113 arranged which through an appliance door 115 is closable, through which the interior of the laundry care device 100 is accessible for loading laundry.

In the interior of the laundry care device 100 is a tub 119 to hold the washing liquid and one in 3 laundry drum, not shown 117 arranged to hold laundry.

Between the laundry drum 117 , the tub 119 and the appliance door 115 is a cuff 139 arranged. The cuff 139 provides a fluidic seal between the laundry drum 117 or the tub 119 and a device housing 141 of the laundry care appliance 100 for sure.

On the cuff 139 is the inlet nozzle 123 arranged. Between the cuff 139 and the appliance door 115 is an injection channel 145 arranged, through which from the inlet nozzle 123 escaping washing liquid, in particular washing liquid jet, is passed, in particular in a first operating mode of the circulation pump 127 is directed. The inlet nozzle 123 is through a feed section 147 with one line 125 of the pumping system fluidly connected. Here the inlet nozzle extends 123 in particular at an angle to the feed section 147 ,

One in 3 Circulation pump, not shown 127 which in the line 125 of the laundry care appliance 100 is arranged, is formed in a first operating mode of the circulation pump 127 Washer fluid at a first flow rate in a first flow rate range through the conduit 125 and through the inlet nozzle 123 to pump the washing liquid of the laundry in the laundry drum 117 feed directly. Here, the in the first operating mode of the circulation pump 127 generated wash liquid jet along an injection axis 149 from the inlet nozzle 123 discharged.

In the 3 Circulation pump, not shown 127 is also designed, in a second operating mode, washing liquid with a second flow rate in a second flow rate range through the line 125 and through the inlet nozzle 123 to pump the washer fluid to the inside of a door 143 the appliance door 115 feed and on the inside of the door 143 remove accumulated impurities. Here, the in the second operating mode of the circulation pump 127 generated wash liquid jet along the injection axis 149 from the inlet nozzle 123 discharged.

Due to the identical orientation of the inlet nozzle 123 is the injection axis 149 the same in the first and second operating modes.

One in 3 rotation axis only shown schematically 150 the laundry drum 117 extends from the front of the device 103 to a rear of the device 105 of the laundry care appliance 100 , The injection axis extends here 149 at an angle to the axis of rotation 150 ,

In particular, a first angle of incidence 151-1 of the wash liquid jet impinging on the laundry between the injection axis 149 and the axis of rotation 150 smaller than a second angle of incidence 151-2 on the inside of the door 143 impinging jet of washing liquid between the injection axis 149 and the axis of rotation 150 ,

Because on the out of the inlet nozzle 123 exiting wash liquid jet which acts by gravity, the exiting wash liquid has a parabolic shape 153 on, so that the course of the washing liquid with increasing distance from the inlet nozzle 123 from the injection axis 149 differs.

Here is in particular a first parabolic course 153-1 of the wash liquid jet in the first operating mode of the circulation pump 127 flatter than a second parabolic curve 153-2 of the wash liquid jet in the second operating mode of the circulation pump 127 ,

Due to the flatter first parabolic curve 153-1 of the wash liquid jet can during the first operating mode of the circulation pump 127 the wash liquid jet above the inside of the door 143 passed by and directly to the laundry in the laundry drum 117 be fed.

Due to the steeper second parabolic course 153-2 of the wash liquid jet can during the second operating mode of the circulation pump 127 the wash liquid jet on the inside of the door 143 the appliance door 115 to be directed to the inside of the door 143 accumulated impurities, such as lint or foam residues, can be effectively removed and placed in the tub 119 to wash.

The inside of the door 143 the appliance door 115 in particular has a stepped inner door region 155 against which the one on the inside of the door 143 impinging washing liquid is sprayable to the washing liquid along the surface of the inside of the door 143 to lead.

The stepped inside of the door 155 is between one of the laundry drums 117 facing back wall 157 and one on the outside of the door 159 the appliance door 115 facing connection area 161 arranged.

One in 3 Control not shown 133 is designed the first and second operating mode of the circulation pump 127 to activate.

In particular, the laundry care device 100 an actuating element, which by a user of the laundry care device 100 is actuated, the control 133 the second operating mode of the circulation pump is designed in response to the actuation of the actuating element 127 to activate. It is thus possible for a user, for example, as soon as contamination, in particular fluff, on the inside of the door 143 the appliance door 115 are visible from the outside, in particular by manually actuating the actuating element a program selector switch, the second operating mode of the circulation pump 127 to remove the dirt on the inside of the door 143 to activate. The actuating element can in particular be designed as a program selection device for selecting a door cleaning program from a plurality of laundry care programs, with the control 133 formed the second operating mode of the circulation pump when selecting the door cleaning program 127 to activate.

In particular, the control 133 is formed, the first operating mode of the circulation pump during a first time interval 127 the control must be activated 133 formed the second operating mode of the circulation pump during a second time interval following the first time interval 127 to activate.

So the controller 133 advantageously the second operating mode of the circulation pump during a second time interval following the first time interval 127 activate so that after the washing liquid directly the laundry in the laundry drum 117 was supplied in the second operating mode, the washing liquid on the inside of the door 143 is supplied to effectively remove contaminants.

The control 133 is particularly designed during the first operating mode of the circulation pump 127 to vary the first flow rate within the first flow rate range, in particular to vary it periodically, in order to vary the point at which the washing liquid hits the laundry.

The control 133 is particularly designed during the second operating mode of the circulation pump 127 to vary the second flow rate within the second flow rate range, in particular to vary it periodically, in order to determine the location of the washing liquid on the inside of the door 143 the appliance door 115 to vary.

Even if this is in the 3 is not shown, the circulation pump 127 a pump impeller for pumping washing liquid, the circulation pump 127 is configured to rotate the pump impeller in a first speed range in the first operating mode in order to pump washing liquid at the first flow rate, the circulation pump 127 is configured to rotate the pump impeller in a second speed range in the second operating mode in order to pump washing liquid at the second flow rate.

Here, the pump impeller can rotate in the first and second operating modes, in particular in the same direction of rotation, or the pump impeller can rotate in different directions of rotation in the first and second operating modes.

In summary, it can be stated that if the washing liquid in this case comes out of the inlet nozzle at the second flow rate, which is lower than the first flow rate 123 is directed and the generated wash liquid jet against the inside of the door 143 the appliance door 115 is directed, the washing liquid a large area of the inside of the door 143 wet and on the inside of the door 143 effectively rinse off accumulated impurities such as lint and the tub 119 can supply.

By removing the dirt on the inside of the door 143 can give the user an unobstructed view through the appliance door 115 in the laundry drum 107 be made possible. In addition to removing contaminants, such as fluff, on the inside of the door 143 also removes foam attached to the impurities caused by the laundry care substance in the washing liquid, so that it is prevented that on the inside of the door 143 Collect large amounts of foam, which can be a hindrance when draining the washing liquid, especially at the end of the washing process.

By removing the contaminants, especially fluff and / or foam residues, from the inside of the door 143 can cause friction between the laundry and the inside of the door 143 , or the one on the inside of the door 143 adjacent cuff 139 be reduced, thereby reducing the life of the cuff 139 can be increased. By wetting the inside of the door 143 , or the cuff 139 , can also drive torque of the drum drive 129 be reduced so that the operating time of the drum drive 129 can be increased.

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

The procedure 200 includes activation as the first step of the process 201 a first operating mode of the circulation pump 127 through the controller 133 for pumping washing liquid through the line at a first flow rate in a first flow rate range 125 and through the inlet nozzle 123 to the washing liquid of the laundry in the laundry drum 117 feed directly.

The procedure 200 includes activation as a second step 203 a second operating mode of the circulation pump 127 through the controller 133 for pumping washing liquid through the line at a second flow rate in a second flow rate range 125 and through the inlet nozzle 123 to wash the inside of the door 143 the appliance door 115 feed and on the inside of the door 143 remove accumulated impurities, the second flow rate range being different from the first flow rate range.

All of the features explained and shown in connection with individual embodiments of the invention can be provided in different combinations in the subject matter of 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 explained in the description or shown in the figures.

LIST OF REFERENCE NUMBERS

100

Laundry care device

101

dispenser tray

103

Front Panel

105

Rear

107

Devices longitudinal sides

109

Bottom side

111

Top panel

113

Gerätebeladeöffnung

115

door

117

washing drum

119

tub

121

drain hole

123

inlet nozzle

125

management

127

pump

129

drum drive

131

drive connection

133

control

135

First control connection

137

Second control connection

139

cuff

141

device housing

143

Inside of the door

145

Injection channel

147

feeding

149

Injection axis

150

axis of rotation

151-1

First impact angle

151-2

Second impact angle

153

Throwing parabola-shaped course

153-1

First parabolic course

153-2

Second parabolic curve

155

Stepped door inside area

157

rear wall

159

Door outside

161

connecting area

200

Process for maintaining laundry

201

First process step: activation of a first operating mode of the circulation pump

203

Second method step: activation of a second operating mode of the circulation pump

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 4447160 A1 [0003]
• DE 102014220020 A1 [0004]

Claims (15)

Laundry care device (100) with a laundry drum (117) for receiving laundry, a device loading opening (113) on a device front (103) of the laundry care device (100), a device door (115) for closing the device loading opening (113), the device door (115 ) has a door inside (143) facing the laundry drum (117), a tub (119) for holding washing liquid, the tub (119) having a drain opening (121), the laundry care device (100) having an inlet nozzle (123), wherein the drain opening (121) is fluidly connected to the inlet nozzle (123) by a line (125), a circulation pump (127) in the line (125) for pumping the washing liquid from the drain opening (121) through the line (125) and arranged through the inlet nozzle (123) and a controller (133) for controlling the circulation pump (127), characterized in that the circulation pump (127) is formed in a first operating mode, pump washing liquid at a first flow speed in a first flow speed range through the line (125) and through the inlet nozzle (123) in order to supply the washing liquid directly to the laundry in the laundry drum (117), and that the circulation pump ( 127) is designed, in a second operating mode, to pump washing liquid at a second flow speed in a second flow speed range through the line (125) and through the inlet nozzle (123) in order to supply the washing liquid to the inside of the door (143) of the appliance door (115) and on remove contaminants accumulated on the inside of the door (143), the first and second flow velocity ranges not overlapping, and the controller (133) being designed to activate the first and second operating modes of the circulation pump (127). Laundry care device (100) after Claim 1 , characterized in that the laundry care device (100) has an actuating element which can be actuated by a user of the laundry care device (100), the controller (133) being designed to activate the second operating mode of the circulation pump (127) in response to actuation of the actuating element , Laundry care device (100) according to any one of the preceding claims, characterized in that the controller (133) is designed to activate the first operating mode of the circulation pump (127) during a first time interval, and in that the controller (133) is designed during an operation to activate the second operating mode of the circulation pump (127) after the second time interval following the first time interval. Laundry care device (100) according to any one of the preceding claims, characterized in that the controller (133) is designed to vary the first flow rate within the first flow rate range, in particular periodically, during the first operating mode of the circulation pump (127), in particular to vary periodically, in order to meet the impact Vary washing liquid on the laundry, and / or that the controller (133) is designed to vary the second flow speed within the second flow speed range during the second operating mode of the circulation pump (127), in particular to vary periodically, in order to determine the impact of the washing liquid on the Vary the inside of the door (143) of the appliance door (115). Laundry care appliance (100) according to one of the preceding claims, characterized in that the circulation pump (127) has a pump impeller for pumping washing liquid, the circulation pump (127) being designed to rotate the pump impeller at a first speed in the first operating mode Pumping washing liquid at the first flow rate, wherein the circulation pump (127) is designed to rotate the pump impeller at a second speed in the second operating mode in order to pump washing liquid at the second flow rate, the pump impeller in the first and second operating modes, in particular in rotates in the same direction or in different directions. Laundry care appliance (100) according to one of the preceding claims, characterized in that the second flow rate range is less than the first flow rate range, in particular the second speed is less than the first speed. Laundry care device (100) according to one of the preceding claims, characterized in that the inlet nozzle (123) is designed, the washing liquid emerging from the inlet nozzle (123) with a parabolic shape of the laundry in the laundry drum (117) or the inside of the door (143 ) to the appliance door (115), whereby in particular a first parabolic course (153-1) of the washing liquid in the first operating mode of the circulation pump (127) is flatter than a second parabolic course (153-2) of the washing liquid in the second operating mode of the circulation pump (127). Laundry care appliance (100) according to one of the preceding claims, characterized in that that the laundry drum (117) is rotatable about an axis of rotation (150), the axis of rotation (150) extending from the front of the appliance (103) to a rear of the appliance (105) of the laundry care appliance (100), the inlet nozzle (123) being formed, in the first operating mode of the circulation pump (127), to discharge the washing liquid along an injection axis (149) from the inlet nozzle (123), the inlet nozzle (123) being designed, in the second operating mode of the circulation pump (127) the washing liquid along the injection axis (149 ) from the inlet nozzle (123), the injection axis (149) extending at an angle to the axis of rotation (150) of the laundry drum (117), and in particular a first angle of incidence (151-1) between the laundry during the first operating mode impinging injection jet and the axis of rotation (150) is smaller than a second angle of incidence (151-2) between one during the second operation mode on the inside of the door (143) and the axis of rotation (150). Laundry care appliance (100) according to one of the preceding claims, characterized in that the inside of the door (143) of the appliance door (115) has a rear wall (157) facing the laundry drum (117), that the inside of the door (143) of the appliance door (115) is one Has the outside (159) of the appliance door (115) facing connection area (161), the inside of the door (143) between the rear wall (157) and the connecting area (161) has a stepped inside area (155) against which the door inside (143 ) impinging washing liquid can be sprayed on in order to guide the washing liquid along the surface of the stepped inside area (155) of the door. Laundry care appliance (100) according to one of the preceding claims, characterized in that the inlet nozzle (123) is arranged on an upper front side of the tub (119), and in that the outlet opening (121) is arranged on an underside of the tub (119), wherein the inlet nozzle (123) is arranged in particular on a sleeve (139) of the laundry care appliance (100). Laundry care device (100) after Claim 10 , characterized in that an injection channel (145) is formed between the sleeve (139) and the appliance door (115), the inlet nozzle (123) being arranged, the washing liquid emerging from the inlet nozzle (123), in particular in the first operating mode of the circulation pump (127) through the injection channel (145). Laundry care appliance (100) according to one of the preceding claims, characterized in that the line (125) has a feed section (147) which is fluidically connected to the inlet nozzle (123), the inlet nozzle (123) extending in particular at an angle to the feed section (147) , Method (200) for maintaining laundry (139) in a laundry care device (100), the laundry care device (100) comprising a laundry drum (117) for receiving laundry, a device loading opening (113) on a front side (103) of the laundry care device (100) , an appliance door (115) for closing the appliance loading opening (113), the appliance door (115) having an inside (143) of the door facing the laundry drum (117), a tub (119) for holding washing liquid, the tub (119) being a Has drain opening (121), the laundry care device (100) having an inlet nozzle (123), the drain opening (121) being fluidly connected to the inlet nozzle (123) by a line (125), a line circulation pump in the line (125) (127) for pumping the washing liquid from the drain opening (121) through the line (125) and through the inlet nozzle (123), and a controller (133) for controlling the circulation nspumpe (127), characterized in that the method (200) comprises the following steps, activating (201) a first operating mode of the circulation pump (127) by the controller (133) for pumping washing liquid at a first flow rate in a first Flow rate range through the line (125) and through the inlet nozzle (123) to supply the washing liquid to the laundry in the laundry drum (117) directly and activating (203) a second operating mode of the circulation pump (127) by the controller (133) for pumping washing liquid at a second flow speed in a second flow speed range through the line (125) and through the inlet nozzle (123) in order to supply the washing liquid to the inside of the door (143) of the appliance door (115) and to remove impurities attached to the inside of the door (143), wherein the first and second flow rate ranges do not overlap chneiden. Method (200) according to Claim 13 , characterized in that the laundry care device (100) has an actuating element which can be actuated by a user of the laundry care device (100), the activation (203) of the second operating mode of the circulation pump (127) by the controller (133) in response to the actuation of the Actuator is carried out. Method (200) according to Claim 13 or 14 , characterized in that during the first operating mode of the circulation pump (127) the first flow rate varies within the first flow rate range is varied, in particular periodically, in order to vary the impact of the washing liquid on the laundry, and / or that during the second operating mode of the circulation pump (127) the second flow rate is varied, in particular is varied periodically, in order to determine the impact rate of the Vary washing liquid on the inside of the door (143) of the appliance door (115).

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