EP3613891A1 - Laundry care device with 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 pump-around 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 receiving laundry, an appliance loading opening a device front of the laundry care device, a device door for closing the device loading opening, the device door having an inside of the door facing the laundry drum, a tub for receiving washing liquid, the tub having an outlet opening, the laundry care device having an inlet nozzle, the outlet opening with the inlet nozzle through a line is fluidly connected, 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, the circulation pump being designed in a first operating mode with washing liquid pump a first flow rate in a first flow rate range through the conduit and through the inlet nozzle to directly add the washing liquid to the laundry in the laundry drum The circulation pump 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 and through the inlet nozzle in order to supply the washing liquid to the inside of the appliance door and to remove impurities attached to the inside of the door, whereby the first and second flow rate ranges do not overlap, and wherein the controller is configured 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 prevent contamination 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 velocity range is made possible in order to vary the impact of the washing liquid discharged from the inlet nozzle into the washing 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. In particular, the washing liquid can also be supplied indirectly to the inside of the door during the second operating mode, in that the washing liquid first hits the cuff and the washing liquid bouncing off the cuff then hits the inside of the appliance 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 control being designed in an appealing manner on the selection of the door cleaning program to activate the second operating mode of the circulation pump.

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, in particular the second speed is lower than the first speed, or the second flow speed range is greater than the first flow speed range, in particular the second speed being greater 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. If the second flow rate range is larger than the first flow rate range, e.g. by bouncing off the washing liquid from a cuff, the washing liquid is also effectively directed indirectly to the inside of the door.

The first speed corresponds to the speed of the pump impeller of the circulation pump in order to pump washing liquid at the first flow rate through the line and through the inlet nozzle. The second speed corresponds to the speed of the pump impeller of the circulation pump in order to pump washing liquid at the second flow rate and to supply the washing liquid to the inside of the door of the appliance door and to remove impurities attached to the inside of the door.

In an advantageous embodiment of the laundry care device, the inlet nozzle is designed to supply the washing liquid emerging from the inlet nozzle with a throwing parabola-shaped course of the laundry in the laundry drum or inside the door of the appliance door, in particular a first throwing parabola-shaped course of the washing liquid in the first operating mode Circulation pump is flatter than a second parabolic course of the washing liquid in the second operating mode of 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 flows through the Gravity is deflected. 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 gravitational 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.

If, alternatively, during the second operating mode, the second flow rate of the washing liquid is in particular greater than the first flow rate of the washing liquid during the first operating mode, the washing liquid bounces off, in particular, from a cuff of the laundry care device and the ricocheting washing liquid subsequently hits the inside of the door. In this case too, the corresponding first parabolic curve of the washing liquid during the first operating mode is flatter than the corresponding second parabolic curve of the washing liquid during the second operating mode, since the washing liquid bouncing off the cuff hits the inside of the door steeply, in particular vertically ,

In an advantageous embodiment of the laundry care device, the laundry drum is rotatable about an axis of rotation, the axis of rotation being different from the Front of the device extends to a rear of the laundry care device, the inlet nozzle being designed to discharge the washing liquid along the injection axis from the inlet nozzle in the first operating mode of the circulation pump, the inlet nozzle being designed, in the second operating mode of the circulation pump the washing liquid being drawn out of the inlet nozzle along the injection axis The injection axis extends at an angle to the axis of rotation of the laundry drum, and in particular a first angle of incidence between an injection jet impinging on the laundry during the first operating mode and the axis of rotation is smaller than a second angle of incidence between one impinging on the inside of the door during the second operating mode Injection jet and 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 point of impact to maximize. In the case of a direct impact of the washing liquid on the inside of the door and an indirect impact of the washing liquid on the inside of the door by ricocheting washing liquid, in both cases in particular the second angle of incidence during the second operating mode is greater than the first angle of impact during the first operating mode.

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 have the laundry drum at an application speed drive in order to bring the laundry received in the laundry drum into contact with the laundry drum, in particular the cylindrical outer surface of the laundry drum, and thereby to form a laundry tunnel within the laundry lying against the laundry drum, the inlet nozzle being designed in the first operating mode of the To guide the circulation pump washing liquid emerging from the inlet nozzle into the laundry tunnel within the laundry lying on the laundry drum, the installation speed in particular encompassing 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 which have a laundry capacity of approximately 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, the cuff has a rigid cuff section and a flexible cuff section, the inlet nozzle is arranged on the rigid cuff section, and the inlet nozzle is arranged to guide washing liquid pumped through the inlet nozzle at the second flow rate to the flexible cuff section in the second operating mode in order to supply the washing liquid bouncing off the flexible sleeve section to the inside of the appliance door and to remove impurities attached to the inside of the door.

This achieves the technical advantage that the washing liquid directed to the flexible cuff section in the second operating mode at the second flow rate can advantageously bounce off the flexible cuff section and, in particular over a large area, can effectively wet the inside of the appliance door in order to remove impurities attached to the inside of the door , In particular, the second flow rate range is larger than the first flow rate range.

In particular, the flexible sleeve section has a contoured surface, in particular comprising projections, ribs, grooves and / or depressions, in order to ensure an effective fanning out of the washing liquid which rebounds from the flexible sleeve section.

In particular, the flexible cuff section can be displaced at least in sections due to the vibrations of the laundry care device occurring during operation of the laundry care device, in order to shift the impact of the washing liquid bouncing off the flexible cuff section on the inside of the appliance door and to wet or wet a large area of the appliance door clean.

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 injection channel is delimited by a flexible cuff section of the cuff and by the appliance door, the inlet nozzle being arranged to direct the washing liquid emerging from the inlet nozzle, in particular in the second operating mode of the circulation pump, to the inside of the appliance door to remove impurities accumulated on the inside of the door, or wherein the inlet nozzle is arranged to direct the washing liquid emerging from the inlet nozzle, in particular in the second operating mode of the circulation pump, to the flexible sleeve section in order to feed the washing liquid bouncing off the flexible sleeve section to the inside of the door of the appliance door and to remove dirt accumulated on the inside of the door

This achieves the technical advantage that in the second operating mode the washing liquid can either be directed directly to the inside of the appliance door, or that in the second operating mode the washing liquid can be directed indirectly to the inside of the appliance door by first washing the washing liquid through the inlet nozzle the flexible cuff section is passed, and the washing liquid which rebounds therefrom is then fed to the inside of the appliance door.

In particular, when the liquid is directed directly to the inside of the door, the second flow rate range is larger than the first flow rate range. In particular, when the liquid is directed directly to the inside of the door, the second flow rate range is larger than the first flow rate range.

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 flow rate is varied within the first flow rate range during the first operating mode of the circulation pump, in particular is varied periodically in order to vary the impact of the washing liquid on the laundry, and / or the second flow rate becomes during the second operating mode of the circulation pump varies within the second flow speed range, in particular varies periodically, in order to vary the point at which the washing liquid strikes the inside of the appliance door.

Fig. 1

eine schematische Ansicht eines Wäschepflegegeräts;

Fig. 2

eine schematische Ansicht eines Wäschepflegegeräts mit einem Umpumpsystem;

Fig. 3

eine perspektivische Schnittdarstellung eines Wäschepflegegeräts mit einer Einlassdüse; und

Fig. 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:

Fig. 1

a schematic view of a laundry care device;

Fig. 2

a schematic view of a laundry care device with a pumping system;

Fig. 3

a perspective sectional view of a laundry care device with an inlet nozzle; and

Fig. 4

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

Fig. 1 shows a schematic view of a general laundry care appliance 100, such as a washing machine. The laundry care device 100 comprises a induction bowl 101, into which washing care substance, such as, for example, detergent, can be filled. The laundry care appliance 100 has an appliance front side 103, an appliance rear side 105, appliance longitudinal sides 107, an appliance underside 109 and an appliance top 111. There is a device loading opening on the front of the device 103 of the laundry care device 100 113 arranged, which can be closed by an appliance door 115 in order to load the laundry care device 100 with laundry.

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

When the laundry drum 117 is fully loaded, the washing liquid injected into the washing drum 117 through the inlet nozzle 123 can bounce off the laundry, so that access to the interior of the laundry tunnel is blocked, and the washing liquid can run back into the tub 119 without completely closing the laundry flood. If the laundry drum 117 rotates very quickly, the laundry is pressed against the laundry drum 117 due to the centrifugal forces that occur, as a result of which a laundry tunnel is formed in the laundry drum 117. The washing liquid is pumped from the circulation pump 127 through the line 125 to the inlet nozzle 123. It must then be ensured that the washing liquid pumped out through the inlet nozzle 123 advantageously hits the laundry tunnel of the laundry in the rotating laundry drum 117. 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 that is directed outward from the laundry tunnel from the inside to the outside.

Fig. 3 shows a perspective sectional view of a laundry care device with an inlet nozzle. In the in Fig. 3 The selected representation shows a lateral longitudinal section of a laundry care device 100 in the loaded state during the pump-around injection process. In Fig. 3 the device top 111 and the device front 103 of the laundry care device 100 is shown schematically. A device loading opening 113 is arranged on the front of the device 103 and can be closed by a device door 115, through which the interior of the laundry care device 100 is accessible for loading laundry.

In the interior of the laundry care device 100 there is a tub 119 for holding the washing liquid and one in Fig. 3 Laundry drum 117, not shown, is arranged for receiving laundry.

A sleeve 139 is arranged between the laundry drum 117, the tub 119 and the appliance door 115. The cuff 139 ensures a fluid-technical seal between the laundry drum 117 or the tub 119 and a device housing 141 of the laundry care device 100.

The inlet nozzle 123 is arranged on the cuff 139. In particular, the injector 123 is at an in Fig. 3 not highlighted rigid cuff portion of the cuff 139 arranged. Between the sleeve 139 and the appliance door 115, an injection channel 145 is arranged, through which washing liquid, in particular washing liquid jet, emerging from the inlet nozzle 123 is directed, in particular in a first operating mode of the circulation pump 127. The inlet nozzle 123 is fluidly connected to a line 125 of the pumping system by a feed section 147. Here, the inlet nozzle 123 extends in particular at an angle to the feed section 147.

In particular, the injection channel 145 is through the door inside 143 of the appliance door 115 and through an in Fig. 3 not highlighted flexible cuff portion of the cuff 139 limited.

One in Fig. 3 Circulation pump 127, not shown, which is arranged in line 125 of laundry care device 100, is designed in a first operating mode of the circulation pump 127 to pump washing liquid at a first flow rate in a first flow rate 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. Here, the wash liquid jet generated in the first operating mode of the circulation pump 127 is discharged from the inlet nozzle 123 along an injection axis 149.

In the Fig. 3 Circulation pump 127, not shown, is also designed to pump washing liquid at a second flow speed in a second flow speed range through line 125 and through inlet nozzle 123 in a second operating mode, in order to supply the washing liquid to an inside of door 143 of appliance door 115 and accumulated on inside of door 143 Remove impurities. Here, the wash liquid jet generated in the second operating mode of the circulation pump 127 is discharged out of the inlet nozzle 123 along the injection axis 149.

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

One in Fig. 3 The axis of rotation 150 of the laundry drum 117, which is only shown schematically, extends from the front 103 of the appliance to a rear 105 of the laundry care appliance 100. The injection axis 149 extends 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 is smaller than a second angle of incidence 151-2 of the wash liquid jet impinging on the inside of the door 143 between the injection axis 149 and the axis of rotation 150.

Since gravity acts on the washing liquid jet emerging from the inlet nozzle 123, the emerging washing liquid has a parabolic curve 153, so that the course of the washing liquid deviates from the injection axis 149 with increasing distance from the inlet nozzle 123.

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

Due to the flatter first throw parabola-shaped course 153-1 of the washing liquid jet, during the first operating mode of the circulation pump 127, the washing liquid jet can be directed past the inside of the door 143 and fed directly to the laundry in the laundry drum 117.

Due to the steeper second throwing parabola-shaped course 153-2 of the washing liquid jet, the washing liquid jet can be directed onto the inside of the door 143 of the appliance door 115 during the second operating mode of the circulation pump 127 in order to remove impurities, such as e.g. Remove fluff or foam residues effectively and rinse them in the tub 119.

The inside of the door 143 of the appliance door 115 has, in particular, a stepped inside area 155 against which the washing liquid impinging on the inside 143 of the door can be sprayed in order to guide the washing liquid along the surface of the inside 143 of the door.

The stepped inner side region 155 is arranged between a rear wall 157 facing the laundry drum 117 and a connecting region 161 facing an outer side 159 of the appliance door 115.

One in Fig. 3 Controller 133, not shown, is designed to activate the first and second operating modes of the circulation pump 127.

In particular, 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 the actuation of the actuating element. It is thus possible for a user, for example, as soon as contamination, in particular fluff, on the inside 143 of the door Appliance door 115 are visible from the outside, by manually actuating the actuating element, in particular a program selector switch, to activate the second operating mode of the circulation pump 127 for removing the impurities on the inside of the door 143. 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, the controller 133 being designed to activate the second operating mode of the circulation pump 127 when the door cleaning program is selected.

In particular, the controller 133 is designed to activate the first operating mode of the circulation pump 127 during a first time interval, the controller 133 is designed to activate the second operating mode of the circulation pump 127 during a second time interval following the first time interval.

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

The controller 133 is in particular designed to vary the first flow rate within the first flow rate range during the first operating mode of the circulation pump 127, in particular to vary it periodically, in order to vary the impact of the washing liquid on the laundry.

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

Even if this is in the Fig. 3 is not shown, the circulation pump 127 has 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, wherein the circulation pump 127 is designed to rotate the pump impeller in a second speed range in the second operating mode in order to supply washing liquid with the second To pump 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 is directed out of the inlet nozzle 123 at the second flow rate, which is lower than the first flow rate, and the generated washing liquid jet is directed against the inside door 143 of the appliance door 115, the washing liquid covers a large area of the inside of the door 143 wet and on the inside 143 accumulated impurities, such as Fluff, rinse effectively and can feed the tub 119.

By removing the impurities on the inside of the door 143, the user can be given an unobstructed view through the appliance door 115 into the laundry drum 107. 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 larger amounts of foam are prevented from accumulating on the inside of the door 143, which is particularly troublesome when the washing liquid is dewatered at the end of the washing process can.

By removing the impurities, in particular fluff and / or foam residues, on the inside of the door 143, the friction between the laundry and the inside of the door 143, or the sleeve 139 resting on the inside of the door 143, can be reduced, which can increase the operating time of the sleeve 139 , By wetting the inside of the door 143 or the collar 139, the drive torque of the drum drive 129 can also be reduced, so that the operating time of the drum drive 129 can be increased.

Alternatively to that in Fig. 3 shown second parabolic curve 153-2 of the washing liquid emerging from the inlet nozzle 123 at a second flow rate, the washing liquid can also be directed to a flexible sleeve section of the sleeve 139 delimiting the injection channel 145, so that the washing liquid ricocheting off it onto the inside of the door 143 Appliance door 115 hits to remove contaminants.

In the in Fig. 3 Indirectly supplying washing liquid, not shown, to the appliance door, the second flow velocity range is larger than the first flow velocity range, so that the washing fluid emerging from the inlet nozzle 123 bounces off the flexible sleeve portion of the sleeve 139 and strikes the door inside 143 of the appliance door approximately perpendicularly.

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

The method 200 comprises, as a first method step, activating 201 a first operating mode of the circulation pump 127 by the controller 133 for pumping washing liquid at a first flow speed in a first flow speed range through the line 125 and through the inlet nozzle 123 to wash the washing liquid of the laundry in the laundry drum 117 feed directly.

The method 200 comprises, as a second method step, 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 to the washing liquid on the inside of the door 143 of the appliance door 115 and remove contaminants attached to the inside of the door 143, the second flow speed range being different from the first flow speed 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

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 designed to 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 a first operating mode 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 wash the washing liquid on the inside of the door (143) of the appliance door (115) to feed and remove impurities accumulated on the inside of the door (143),
wherein the first and second flow rate ranges do not overlap, and wherein
the controller (133) is designed to activate the first and second operating modes of the circulation pump (127). Laundry care device (100) according to 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 an 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 device (100) according to any one of the preceding claims, characterized in that the second flow rate range is less than that is the first flow speed range, in particular the second speed is lower than the first speed, or that the second flow speed range is larger than the first flow speed range, in particular the second speed being greater 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 device (100) according to one of the preceding claims, characterized in that the laundry drum (117) can be rotated about an axis of rotation (150), the axis of rotation (150) extending from the front of the device (103) to a back of the device (105) of the laundry care device ( 100), wherein the inlet nozzle (123) is designed to discharge the washing liquid along an injection axis (149) from the inlet nozzle (123) in the first operating mode of the circulation pump (127), the inlet nozzle (123) being formed in the second Operating mode of the circulation pump (127) to discharge 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 impact angle ( 151-1) small between an injection jet hitting the laundry during the first operating mode and the axis of rotation (150) is more than a second angle of incidence (151-2) between an injection jet hitting the inside of the door (143) during the second operating mode 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 Outside of the door (159) of the appliance door (115) has facing connection area (161), the inside of the door (143) between the rear wall (157) and the connecting area (161) having a stepped inside area (155) against which the washing liquid impinging on the inside of the door (143) can be sprayed around the washing liquid to guide along the surface of the stepped door interior area (155). 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 appliance (100) according to claim 10, characterized in that the sleeve (139) has a rigid sleeve section and a flexible sleeve section, that the inlet nozzle (123) is arranged on the rigid sleeve section, and that the inlet nozzle (123) is arranged in in the second operating mode, to feed washing liquid pumped through the inlet nozzle (123) at the second flow rate to the flexible sleeve section in order to feed the washing liquid bouncing off the flexible sleeve section to the inside of the door (143) of the appliance door (115) and to impurities accumulated on the inside of the door (143) to remove. Laundry care appliance (100) according to claim 10 or 11, characterized in that an injection channel (145) is formed between the sleeve (139) and the appliance door (115), the inlet nozzle (123) being arranged, which emerges from the inlet nozzle (123) escaping washing liquid, in particular in the first operating mode of the circulation pump (127), through the injection channel (145). Laundry care appliance (100) according to claim 10, 11 or 12, characterized in that the injection channel (145) is delimited by a flexible sleeve section of the sleeve (139) and by the appliance door (115), the inlet nozzle (123) being arranged, the to direct washing liquid emerging from the inlet nozzle (123), in particular in the second operating mode of the circulation pump (127), to the inside of the door (143) of the appliance door (115) in order to on the inside of the door (143) to remove accumulated impurities, or wherein the inlet nozzle (123) is arranged to direct the washing liquid emerging from the inlet nozzle (123), in particular in the second operating mode of the circulation pump (127), to the flexible cuff section in order to wash the liquid ricocheting off the flexible cuff section to the inside of the door (143) of the appliance door (115) and to remove any dirt accumulated on the inside of the door (143) 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 deliver the washing liquid of the laundry into feed the laundry drum (117) directly, and
Activation (203) of a second operating mode of the circulation pump (127) by the controller (133) for pumping washing liquid at a second flow rate in a second flow rate range the conduit (125) and through the inlet nozzle (123) to supply the washing liquid to the inside of the door (143) of the appliance door (115) and to remove contaminants attached to the inside of the door (143), the first and second flow rate ranges not overlapping.

Images