DE102019207346A1 - Laundry care device with a pump - Google Patents

Abstract

The present invention relates to a laundry care device (100) with a pump (105) for pumping washing liquid, the pump (105) comprising a suction chamber (107) which has a suction nozzle (109) for fluid connection with a suction line, the pump (105) comprises a pumping pressure chamber (115) which has a pumping pressure connection (117) for fluid connection with a pumping line, the pump (105) comprising a pumping pressure chamber (111) which has a pumping pressure connection (113) for fluid connection with a pumping line , wherein the pumping pressure chamber (111) and the suction chamber (107) are fluidically connected, the pumping pressure chamber (111) and the pumping pressure chamber (115) are fluidically connected, and the pump (105) has a filter element (123) which is in the Pump-out pressure chamber (111) is added, wherein the filter element (123) has a first hollow channel (125-1), which the pump-out pressure chamber (111) fluidly connects to the pumping pressure connection (113), the filter element (123) having a second hollow channel (125-2) which fluidly connects the pumping pressure chamber (111) to the pumping pressure chamber (115), the filter element (123) having a constriction (127 ) which fluidly connects the first hollow channel (125-1) and the second hollow channel (125-2), the constriction (127) being designed to hold back impurities conveyed in the first hollow channel (125-1) in order to prevent, that the impurities are conveyed through the second hollow channel (125-2) into the pumping pressure chamber (115).

Description

The present invention relates to a laundry care device with a pump.

Conventional laundry care devices have a pumping system for large loads, through which washing liquid can be pumped out of the tub and then fed back to the tub. In order to remove washing liquid from the laundry care device after the laundry care process, conventional laundry care devices also have a pumping system. Pumps are required for the pumping over system and the pumping out system in order to ensure an effective pumping of the washing liquid in the laundry care device or an effective pumping out of the washing liquid from the laundry care device.

Since a large number of impurities, such as e.g. If there are foreign bodies, hair or fluff that are pumped through the pump, filter elements or foreign body traps are used in conventional laundry care devices to filter the impurities from the washing liquid.

The object on which the invention is based is to specify a laundry care device with a pump which enables washing liquid to be effectively pumped in the laundry care device.

This object is achieved by the subject matter with the features according to the independent claim. Advantageous embodiments of the invention are the subject matter of the figures, the description and the dependent claims.

According to one aspect of the invention, the object is achieved by a laundry care device with a pump for pumping washing liquid, wherein the pump comprises a suction chamber which has a suction nozzle for fluid connection with a suction line, the pump comprising a pumping pressure chamber which has a pumping pressure port for having fluid-technical connection with a pump-out line, wherein the pump comprises a pump-down pressure chamber which has a pump-down pressure connection for fluid connection with a pump-out line, the pump-down pressure chamber and the suction chamber being connected fluidically, the pump-down pressure chamber and the pump-down pressure chamber being fluidically connected, and the pump a Has filter element which is received in the pump-out pressure chamber, the filter element having a first hollow channel which fluidly connects the pump-out pressure chamber to the pump-out pressure nozzle, the filter element having a second hollow channel al, which fluidly connects the pumping pressure chamber to the pumping pressure chamber, the filter element defining a constriction which fluidly connects the first hollow channel and the second hollow channel, the constriction being designed to hold back impurities conveyed in the first hollow channel in order to prevent the Impurities are conveyed through the second hollow channel into the pumping pressure chamber.

This achieves the technical advantage that the narrowing between the first and second hollow ducts means that impurities are retained by the filter element and that these impurities are therefore not conveyed from the first hollow duct through the second hollow duct into the pumping pressure chamber, so that the impurities during a subsequent Cannot be recirculated during the pumping process.

According to the present disclosure, the suction chamber, pumping pressure chamber and pumping pressure chamber of the pump are fluidly connected in series so that the washing liquid cannot be conveyed directly from the suction chamber into the pumping pressure chamber, but the washing liquid is conveyed from the suction chamber through the pumping pressure chamber into the pumping pressure chamber. Due to the filter element arranged in the pumping pressure chamber, the washing liquid must first pass through the first hollow channel, the constriction and then the second hollow channel of the filter element before it flows out of the pumping pressure chamber into the pumping pressure chamber, so that the impurities carried along by the washing liquid are effectively filtered at the constriction and thus can be held back.

During a pumping process, washing liquid conveyed by the pump, in particular by a pumping device of the pump, can be pumped from the suction chamber into the pumping pressure chamber and conveyed through the first hollow channel of the filter element into the pumping pressure port.

The second hollow channel of the filter element fluidly connects the first hollow channel to the pumping pressure chamber, so that during a pumping process by the pump, in particular by a pumping device of the pump, washing liquid conveyed is pumped from the suction chamber into the pumping pressure chamber and through the first hollow channel to the constriction between the first hollow channel and the second hollow channel is conveyed, the washing liquid then being conveyed from the constriction through the second hollow channel into the pumping pressure chamber.

Here, the constriction can in particular be formed at least in sections in the filter element itself, or the constriction can in particular be delimited at least in sections by the filter element and a wall of the pump-out pressure chamber.

In the case of a subsequent pumping-out process, the impurities remaining in the pumping-out pressure chamber and retained by the filter element, in particular at the constriction, can be removed from the pump. This can prevent the constriction of the filter element from being clogged by the accumulation of impurities.

A laundry care device is understood to mean a device which is used for laundry care, e.g. a washing machine or tumble dryer. In particular, such a laundry care device is understood 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 household quantities.

In an advantageous embodiment of the laundry care device, the first hollow channel and the second hollow channel abut one another at least in sections, and the first hollow channel and the second hollow channel are separated from one another by a channel partition.

This achieves the technical advantage that a compact arrangement of the filter element is ensured due to the at least section-wise contact of the two hollow channels and that an effective delimitation of the two hollow channels is achieved by the channel partition.

In an advantageous embodiment of the laundry care device, the first hollow channel extends along a first direction of extent from the pump-out pressure chamber to the constriction, and the second hollow channel extends along a second direction of extent from the constriction to the pump-over pressure chamber, the second direction of extent extending at an angle to the first direction of extent .

This achieves the technical advantage that the different directions of extension of the first and second hollow channels at the constriction between the first and second hollow channels ensure that the washing liquid conveyed by the pump is effectively deflected.

In an advantageous embodiment of the laundry care device, the first hollow channel extends straight inside the filter element and / or the second hollow channel extends in a curved manner inside the filter element.

This achieves the technical advantage that the straight extension of the first hollow channel ensures that the washing liquid is effectively supplied to the pump-out pressure connection during a pumping-out process. Due to the curved extension of the second hollow channel within the filter element, a spatially optimized fluid-technical connection between the first hollow channel and the pumping pressure chamber can be ensured through the second hollow channel.

In an advantageous embodiment of the laundry care device, the second hollow channel has a hollow channel front section which faces the first hollow channel and a hollow channel rear section which faces the pumping pressure chamber, the constriction being arranged between the first hollow channel and the hollow channel front section of the second hollow channel, wherein In particular, the hollow channel front section extends straight and the hollow channel rear section curved inside the filter element.

This achieves the technical advantage that contaminants can particularly advantageously be retained at the constriction between the first hollow channel and the hollow channel front section of the second hollow channel.

In an advantageous embodiment of the laundry care device, the front hollow channel section extends parallel to the first hollow channel and / or the rear hollow channel section extends at an angle to the first hollow channel.

This achieves the technical advantage that the parallel extension of the hollow channel front section of the second hollow channel to the first hollow channel at the constriction, which is arranged between the first hollow channel and the hollow channel front section of the second hollow channel, enables a 180 ° deflection of the washing liquid conveyed through the constriction can be, whereby a particularly effective retention of impurities at the constriction can be ensured.

In an advantageous embodiment of the laundry care appliance, the first hollow channel has a first flow cross section and the second hollow channel has a second flow cross section, the second flow cross section being smaller than the first flow cross section.

This has the technical advantage that compared to the second Flow cross-section of the second hollow channel, larger first flow cross-section of the first hollow channel, a large amount of washing liquid can be pumped out through the pump-out pressure connection of the pump during a pumping-out process.

In an advantageous embodiment of the laundry care device, the filter element has a first connection piece which delimits the first hollow channel, and the filter element has a second connection piece which delimits the second hollow channel, the first connection piece and the second connection piece being arranged at an angle to one another.

This achieves the technical advantage that an effective fluidic connection between the filter element and the pump-out pressure nozzle or the pump-over pressure chamber can be achieved through the angled arrangement of the first and second connection pieces.

In an advantageous embodiment of the laundry care device, the constriction is shaped as an annular gap of the filter element, the annular gap running around the first connecting piece at least in sections, and the annular gap fluidically connecting the first hollow channel to the second hollow channel.

This achieves the technical advantage that, when the washing liquid is pumped around, impurities can be effectively retained through the annular gap by forming the constriction as an annular gap surrounding the first connection stub at least in sections and are not conveyed through the second hollow channel into the pumped circulation pressure chamber.

In an advantageous embodiment of the laundry care device, the annular gap is designed as a spiral annular gap, the spiral annular gap running around the first connecting piece in a spiral at least in sections.

This has the technical advantage that the spiral-shaped annular gap ensures an effective flow cross-sectional constriction, so that the impurities carried along by the washing liquid cannot pass through the spiral-shaped annular gap during a pumping process and are therefore effectively retained.

In an advantageous embodiment of the laundry care device, the pump, in particular a pumping device of the pump, is designed to convey the washing liquid during a pumping process through the first hollow channel in a first flow direction, and the pump, in particular a pumping device of the pump, is designed to convey the washing liquid during a pumping over process to convey through the second hollow channel in a second flow direction, the filter element, in particular the constriction, being designed to deflect washing liquid from the first hollow channel into the second hollow channel during the pumping over process.

This achieves the technical advantage that, depending on the operating situation of the pump, the washing liquid is either conveyed directly through the first hollow channel of the filter element in the first flow direction to the pump-out pressure connection, in particular during a pumping process, or the washing liquid is conveyed through from the first hollow channel, in particular during a pumping over process the constriction and is conveyed through the second hollow channel of the filter element in the second flow direction to the pumping pressure chamber.

In an advantageous embodiment of the laundry care device, a partition is arranged between the suction chamber and the pump-out pressure chamber in order to delimit the suction chamber from the pump-out pressure chamber, the partition wall having an opening, in particular a central, concentric opening, in order to connect the suction chamber and the pump-out pressure chamber to one another in terms of fluid technology.

This has the technical advantage that the partition wall ensures an effective delimitation also for foreign bodies and accumulations of hair and lint between the suction chamber and the pumping pressure chamber, whereby the opening enables an effective fluid-technical connection between the suction chamber and the pumping pressure chamber. This particularly concentric opening is often implemented as a suction pipe between the suction chamber and the pump-out pressure chamber.

In a further advantageous embodiment of the laundry care device, a further partition is arranged between the pump-out pressure chamber and the pump-over pressure chamber in order to separate the pump-out pressure chamber from the pump-over pressure chamber, the further partition having a further opening in order to connect the pump-down pressure chamber and the pump-over pressure chamber to one another fluidically, in particular the second hollow channel of the filter element is fluidly connected to the further opening.

This achieves the technical advantage that, for example, an effective fluid-technical connection between the pump-out pressure chamber and the pump-over pressure chamber is made possible through the further partition with the further opening. Here the pumping pressure chamber acts as an upstream suction chamber for the pumping pressure chamber.

In a further advantageous embodiment of the laundry care device, the pump has a further filter element which is accommodated in the suction chamber, the further filter element being designed to filter impurities from the washing liquid, the first hollow channel of the filter element arranged in the pump-out pressure chamber being downstream of the filter element in the Suction chamber arranged further filter element is arranged.

This achieves the technical advantage that the combination of the further filter element arranged in the suction chamber and the filter element arranged in the pump-out pressure chamber ensures particularly effective filtering of impurities in the washing liquid. In particular, the further filter element is designed as a foreign body trap for removing contaminants from the washing liquid, the foreign body trap in particular comprising a plate extending in the pumping direction, which in particular has a front edge in the pumping direction, the contaminants being able to accumulate on the front edge or where the Foreign body trap in particular comprises a receiving area for receiving the contaminants.

In a further advantageous embodiment of the laundry care device, the first and second hollow channels each have a semicircular cross section and the first and second hollow channels are arranged at least in sections next to one another in the filter element, or the first and second hollow channels have a circular cross section, the first hollow channel in the second hollow channel is arranged, or the first hollow channel has a circular cross section, and the second hollow channel has a kidney-shaped cross section, wherein the first and second hollow channel are arranged at least partially next to one another in the filter element.

This achieves the technical advantage that the different cross-sections or geometries of the first and second hollow channels within the filter element can ensure particularly effective fluid guidance in the filter element.

• 1 eine schematische Ansicht eines Wäschepflegegeräts;
• 2 eine schematische Ansicht einer Pumpe des Wäschepflegeräts in Schnittdarstellung;
• 3A, 3B, 3C perspektivische Ansichten eines Filterelements in einer Pumpe des Wäschepflegegeräts gemäß einer ersten Ausführungsform;
• 4A, 4B perspektivische Ansichten eines Filterelements in einer Pumpe des Wäschepflegegeräts gemäß einer zweiten Ausführungsform;
• 5 eine perspektivische Ansicht eines Filterelements gemäß einer dritten Ausführungsform; und
• 6A, 6B, 6C schematische Ansichten von Querschnitten von Hohlkanälen in Filterelementen gemäß weiterer Ausführungsformen.

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

• 1 a schematic view of a laundry care device;
• 2 a schematic view of a pump of the laundry care appliance in a sectional illustration;
• 3A , 3B , 3C perspective views of a filter element in a pump of the laundry care device according to a first embodiment;
• 4A , 4B perspective views of a filter element in a pump of the laundry care device according to a second embodiment;
• 5 a perspective view of a filter element according to a third embodiment; and
• 6A , 6B , 6C schematic views of cross sections of hollow channels in filter elements according to further embodiments.

1 Figure 12 shows a schematic view of a general laundry care appliance 100 such as a washing machine. The laundry care device 100 includes a bowl 101 which can be filled with detergent or other liquid substances. The laundry care device 100 includes a door 103 for loading the laundry care device 100 with laundry.

2 shows a schematic view of a pump of the laundry care appliance in a sectional illustration. The laundry care device 100 includes a pump 105 for pumping washing liquid. The pump 105 is fluidly connected to a suction line in order to draw in washing liquid through the suction line. The pump 105 is with a drain line of the laundry care device 100 connected to washing liquid through the drain line from the laundry care appliance 100 to pump out. The pump 105 is with a circulation line of the laundry care device 100 connected to washing liquid in the laundry care device 100 to pump around, so the washing liquid from a tub of the laundry care device 100 to pump out through the circulation line, and to supply the pumped-out washing liquid to the tub again. The suction line, discharge line and circulation line are in 2 not shown.

The pump 105 includes a suction chamber 107 , which has a suction nozzle 109 which in turn can be fluidically connected to a suction line. The pump 105 further comprises a pump down pressure chamber 111 which has a pumping pressure port 113 which in turn can be fluidically connected to a pump-off line. The pump 105 further comprises a pumping pressure chamber 115 , which have a transfer pressure nozzle 117 has, which in turn with can be fluidly connected to a circulation line of a circulation system.

The suction chamber 107 is with the pumping pressure chamber 111 through a suction pipe 119 fluidly connected. As in 2 also shown is the pumping pressure chamber 111 with the pumping pressure chamber 115 also fluidly connected, in particular by a further suction pipe 121 .

As from the 2 shows the pump instructs 105 a so-called tandem connection of the pump chambers 107 , 111 , 115 on, so that through the suction chamber 107 sucked washing liquid not directly into the pumping pressure chamber 115 can be supplied, but the sucked washing liquid from the suction chamber 107 out through the pumping pressure chamber 111 into the pumping pressure chamber 115 is promoted.

This is in the pumping pressure chamber 111 a filter element received, which is designed to filter impurities from the washing liquid in order to prevent the impurities in the pumping pressure chamber 115 be promoted. Furthermore is in the suction chamber 107 in particular a further filter element or foreign body trap, which is designed to filter impurities from the washing liquid, in order to prevent the impurities from entering the pump-out pressure chamber 111 and from the pumping pressure chamber 111 out into the pumping pressure chamber 115 be promoted. The filter element and the further filter element are in the 2 not shown.

Around foreign bodies and / or accumulations of hair and fluff in front of the pumping pressure chamber 115 to be reduced or to be able to convey away are the pumping pressure chambers 111 and the pumping pressure chamber 115 connected in series and is the pumping pressure chamber 115 with the suction chamber 107 not directly fluidly connected. The fluid connection from the upstream suction chamber 107 to the pumping pressure chamber 115 is only about the flow through the pump pressure chamber 111 possible. As a result, the foreign bodies and large accumulations of hair and fluff initially remain in the pump-out pressure chamber 111 and are only removed from the pumping pressure chamber during a subsequent pumping process 111 through the pump-out pressure port 113 into the pumping line from the laundry care device 100 promoted beyond.

The 3A , 3B , 3C show perspective views of a filter element in a pump of the laundry care device according to a first embodiment.

The filter element 123 has a first hollow channel 125-1 on which those in the 3A , 3B and 3C pumping pressure chamber not shown 111 the pump 105 fluidly with the in the 3A , 3B and 3C pumping pressure connection not shown 113 the pump 105 connects.

The filter element 123 has a second hollow channel 125-2 on which the first hollow channel 125-1 fluidly with the in the 3A , 3B and 3C Umpumpdruckkammer not shown 115 connects.

The filter element 123 exhibits a constriction 127 on which the first hollow channel 125-1 and the second hollow channel 125-2 fluidly connects and is formed in the first hollow channel 125-1 Retain conveyed impurities in order to prevent the impurities from passing through the second hollow channel 125-2 into the pumping pressure chamber 115 be promoted.

Like in the 3A , 3B and 3C shown has the filter element 123 a first connection piece 129-1 on which the first hollow channel 125-1 limited, and has the filter element 123 a second connection piece 129-2 on which the second hollow channel 125-2 limited. Here are the first and second connectors 129-1 , 129-2 at an angle, in particular at right angles, to one another.

The narrowing 127 is here in particular as an annular gap in the filter element 123 shaped, with the constriction shaped as an annular gap 127 the first connection piece 129-1 at least in sections, and wherein the annular gap surrounds the first hollow channel 125-1 with the second hollow channel 125-2 fluidly connects.

As in particular from the 3A and 3C is apparent, the annular gap is designed in particular as a spiral annular gap which the first connecting piece 129-1 at least partially revolves in a spiral.

As in the 3A , 3B and 3C is shown, has the first hollow channel 125-1 a first flow cross section 131-1 on, and has the second hollow channel 125-2 a second flow cross section 131-2 on, the second flow cross section 131-2 less than the first flow cross section 131-1 is.

Like in the 3B shown is the pump 105 , especially a pumping device 112-1 the pump 105 , the washing liquid formed during a pumping process through the first hollow channel 125-1 in a first direction of flow 135-1 to promote, and is the pump 105 , in particular a pumping device 112-2 the pump 105 , formed the washing liquid during a pumping process through the second hollow channel 125-2 in a second direction of flow 135-2 to promote. Here is the filter element 123 , especially the narrowing 127 , in particular the constriction designed as an annular gap 127 formed, during the pumping process washing liquid from the first hollow channel 125-1 into the second hollow channel 125-2 redirect.

The washing liquid thus flows out of the first hollow channel during the pumping over process 125-1 through the narrowing 127 into the second hollow channel 125-2 , with impurities carried along by the washing liquid at the constriction 127 are retained and not by the second hollow channel 125-2 into the pumping pressure chamber 115 can be funded.

The 4A and 4B show perspective views of a filter element in a pump of the laundry care device according to a second embodiment.

In the 4A is the filter element 123 in the pump 105 arranged and shown in a sectional view, whereas in the 4B the filter element 123 without the pump 105 is shown.

As from the 4A can be seen is the filter element 123 in the pumping pressure chamber 111 the pump 105 arranged, wherein the pumping pressure chamber 111 a suction pipe 119 has, which with one in the 4A suction chamber not shown 107 the pump 105 is fluidly connected. Here is between the suction chamber 107 and the pumping pressure chamber 111 a partition 139-1 with an opening 141-1 , especially a central, concentric opening 141-1 , arranged to the suction chamber 107 and the pumping pressure chamber 111 to connect with each other fluidly.

The pump 105 has an in 4A pumping device shown only schematically 112-1 on which the washing liquid from the pump-out pressure chamber 111 through an in 4A pumping pressure connection not shown 113 pumps out.

The pump 105 also has a pumping pressure chamber 115 on which fluidly with the pumping pressure chamber 111 connected is. Here is between the pumping pressure chamber 111 and the pumping pressure chamber 115 another partition 139-2 arranged to the pumping pressure chamber 111 from the pumping pressure chamber 115 to demarcate, and to hold back foreign bodies or impurities, the further partition 139-2 another opening 141-2 has to the pump down pressure chamber 111 and the pumping pressure chamber 115 to connect with each other fluidly.

The pump 105 has an in 4A only schematically shown pumping device 112-2 on which the washing liquid from the pump-out pressure chamber 111 into the pumping pressure chamber 115 promotes and the washing liquid then through an in 4A transfer pressure connection not shown 117 pumped around.

The filter element 123 has a first hollow channel 125-1 on, which is in particular just inside the filter element 123 extends. The filter element 123 has a second hollow channel 125-2 on, which curves in particular within the filter element 123 extends.

Like in the 4A is shown, the first hollow channel extends 125-1 along a first direction of extent 143-1 from the pumping pressure chamber 111 to a constriction 127 , which between the first hollow channel 125-1 and the second hollow channel 125-2 is arranged.

Like in the 4A is shown, the second hollow channel extends 125-2 along a second direction of extent 143-2 from the narrowing 127 to the pumping pressure chamber 115 , the second direction of extent 143-2 at an angle to the first direction of extent 143-1 extends.

The first and second hollow channels 125-1 , 125-2 are in this case at least partially against one another and are through a duct partition 145 separated from each other.

Here, the second hollow channel 125-2 a hollow channel front section 126-1 on which the first hollow channel 125-1 faces, and has the second hollow channel 125-2 a hollow channel rear section 126-2 on which of the pumping pressure chamber 115 is facing. Here is the narrowing 127 between the first hollow channel 125-1 and the hollow channel front section 126-1 of the second hollow channel 125-2 arranged. The hollow channel front section extends here 126-1 in particular straight and the hollow channel rear section extends 126-2 in particular curved within the filter element 123 .

The hollow channel front section extends here 126-1 in particular parallel to the first hollow channel 125-1 and / or the hollow channel rear section extends 126-2 at an angle to the first hollow channel 125-1 .

As from the 4A showing is the narrowing 127 of the filter element 123 between the first hollow channel 125-1 and the second hollow channel 125-2 , in particular between the first hollow channel 125-1 and the hollow channel front section 126-1 of the second hollow channel 125-2 arranged to effectively retain contaminants.

Like in the 4A shown schematically is the pump 105 , especially the pumping device 112-1 the pump 105 , formed the washing liquid during a pumping process through the first hollow channel 125-1 in a first direction of flow 135-1 to promote, and is the pump 105 , especially the pumping device 112-2 the pump 105 , formed the washing liquid during a pumping process through the second hollow channel 125-2 in a second direction of flow 135-2 to promote, the filter element 123 , especially the narrowing 127 , is formed, washing liquid from the first hollow channel during the pumping process 125-1 into the second hollow channel 125-2 redirect.

In particular, the filter element steers 123 the washing liquid in such a way that the washing liquid through the constriction 127 into the second hollow channel 125-2 can flow, and then through the second hollow channel 125-2 in the second direction of flow 135-2 can be promoted. This can contaminate the constriction 127 effectively withheld.

As from the 4B shows the filter element 123 in particular at least one fastening section 147 , in particular several fastening sections 147 , on to the filter element 123 in the pumping pressure chamber 111 to fix.

As from the 4B shows, has the first and / or second hollow channel 125-1 , 125-2 of the filter element 123 an oval cross-section.

5 shows a perspective view of a filter element according to a third embodiment.

That in the 5 shown filter element 123 according to the third embodiment corresponds to that in FIG 4B shown filter element 123 according to the second embodiment, except that the cross section of the second hollow channel 125-2 is not oval, but kidney-shaped. This enables a fluid-optimized connection between the first hollow channel 125-1 and the pumping pressure chamber 115 be ensured.

The 6A , 6B and 6C show schematic views of cross-sections of hollow channels in filter elements according to further embodiments.

In the in 6A shown embodiment of the filter element 123 a suction tube with a circular cross section is shown in an inner suction tube with an annular cross section, so that a first hollow channel 125-1 of the filter element 123 within a second hollow channel 125-2 of the filter element 123 is arranged. For more details on the in 6A shown embodiment of the filter element 123 is used, for example, in the 3A , 3B and 3C Representations shown of the filter element 123 referenced according to the first embodiment.

In the in 6B shown embodiment of the filter element 123 two suction pipes with a semicircular cross-section are shown, which are at least partially next to each other in the filter element 123 are arranged so that a first hollow channel 125-1 of the filter element 123 next to the second hollow channel 125-2 of the filter element 123 is arranged.

In the in 6C shown embodiment of the filter element 123 a kidney-shaped suction tube is shown, which surrounds a circular suction tube, so that a first hollow channel 125-1 of the filter element 123 next to the second hollow channel 125-2 of the filter element 123 is arranged. For more details on the in 6C shown embodiment of the filter element 123 is e.g. on the in 5 Representation of the filter element shown 123 referenced according to the third embodiment.

Through the filter elements illustrated in the embodiments of the present disclosure 123 the following advantages can be achieved.

A decisive advantage of the embodiments of the present disclosure is the use of the pump-down pressure chamber 111 as a pre-filter for the pumping pressure chamber 115 , being concerned about the narrowing 127 the foreign body tolerance of the pumping device 112-2 can be adjusted. Especially the 180 ° deflection of the flow guide in the filter element 123 through the first and second hollow channels 125-1 , 125-2 enables the retention of foreign bodies within the pump-down pressure chamber 111 which can then be pumped out later in a further process step.

The hydraulic pump characteristics, in particular the ratio of the pressure to the delivery flow, can also be influenced when both pump drives of the pumping system are activated. With this pump tandem connection, the suction pressure is reduced in front of and in the common suction chamber 107 , the flow rate almost doubling there, whereas the flow rate at the pump-out pressure connection 113 and the transfer pressure nozzle 117 remain almost unaffected.

With the optional activation of the second pump function, higher pressure differences are generated that can be used to loosen blockages.

This allows adaptive reactions to the pumping behavior of the laundry care device 100 develop. So one can use the suction chamber 107 ventilated pump 105 due to the simultaneous control of both pumping devices 112-1 , 112-2 the pump 105 venting faster and also accelerating the build-up of the flow rate up to the nominal pump flow rate.

The pumping device downstream in the knitting chain 112-2 , in particular the circulation pump, can be activated by a brief activation while the pump-out device is starting up 112-1 , especially the evacuation pump, help the evacuation process of the pumping device 112-1 to accelerate and thus to generate the initial pressure build-up for the flow rate build-up faster.

With a corresponding connection of the two pumping devices 112-1 , 112-2 and thus with the generation of lower system pressures on the suction side, additional and improved cleaning methods can be developed for the entire system. In this case, the requirements for the structural design of the waterways of the pumping circuit can be relaxed, since with this tandem connection the foreign body size to be conveyed for the pumping circuit can be additionally limited or adjusted.

All 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 protection of the present invention is given by the claims and is not restricted by the features explained in the description or shown in the figures.

List of reference symbols

100

Laundry care device

101

Detergent bowl

103

door

105

pump

107

Suction chamber

109

Suction nozzle

111

Pumping pressure chamber

112-1

Pumping device

112-2

Pumping device

113

Pump out pressure port

115

Pumping pressure chamber

117

Transfer pressure port

119

Suction pipe

121

Another suction pipe

123

Filter element

125-1

First hollow channel

125-2

Second hollow channel

126-1

Hollow channel front section

126-2

Hollow channel rear section

127

Narrowing

129-1

First connection piece of the filter element

129-2

Second connection piece of the filter element

131-1

First flow cross section of the first connecting piece

131-2

Second flow cross section of the second connecting piece

135-1

First direction of flow

135-2

Second direction of flow

139-1

partition wall

139-2

Another partition

141-1

opening

141-2

Further opening

143-1

First direction of extension

143-2

Second direction of extension

145

Duct partition

147

Fastening section

Claims (15)

Laundry care device (100) with a pump (105) for pumping washing liquid, the pump (105) comprising a suction chamber (107) which has a suction nozzle (109) for fluid connection with a suction line, the pump (105) having a pump-over pressure chamber (115), which has a pumping pressure connection (117) for fluid connection with a pumping line, the pump (105) comprising a pumping pressure chamber (111) which has a pumping pressure connection (113) for fluid connection with a pumping line, wherein the pumping pressure chamber ( 111) and the suction chamber (107) are fluidly connected, the pump-out pressure chamber (111) and the pump-over pressure chamber (115) being fluid-connected, and the pump (105) having a filter element (123) which is received in the pump-down pressure chamber (111), characterized in that the filter element (123) has a first hollow channel (125-1) which fluidly connects the pump-out pressure chamber (111) to the pump-out pressure nozzle (113), the filter element (123) having a second hollow channel (125-2) which connects the pump-out pressure chamber (111) fluidly connects to the pumping pressure chamber (115), the filter element (123) defining a constriction (127) which fluidly connects the first hollow channel (125-1) and the second hollow channel (125-2), the constriction (127) being formed is to hold back impurities conveyed in the first hollow channel (125-1) in order to prevent the impurities from being conveyed through the second hollow channel (125-2) into the pumping pressure chamber (115) en. Laundry care device (100) according to Claim 1 , characterized in that the first hollow channel (125-1) and the second hollow channel (125-2) abut against each other at least in sections, and that the first hollow channel (125-1) and the second hollow channel (125-2) are separated by a channel partition ( 145) are separated from each other. Laundry care device (100) according to Claim 1 or 2 , characterized in that the first hollow channel (125-1) extends along a first direction of extent (143-1) from the pumping pressure chamber (111) to the constriction (127), and that the second hollow channel (125-2) extends along a second direction of extension (143-2) extends from the constriction (127) to the pumping pressure chamber (115), the second direction of extension (143-2) extending at an angle to the first direction of extension (143-1). Laundry care device (100) according to one of the preceding claims, characterized in that the first hollow channel (125-1) extends straight inside the filter element (123) and / or that the second hollow channel (125-2) is curved inside the filter element ( 123) extends. Laundry care device (100) according to one of the preceding claims, characterized in that the second hollow channel (125-2) has a hollow channel front section (126-1) which faces the first hollow channel (125-1), and a hollow channel rear section (126-2) , which faces the pumping pressure chamber (115), the constriction (127) being arranged between the first hollow channel (125-1) and the hollow channel front section (126-1) of the second hollow channel (125-2) Hollow channel front section (126-1) extends straight and the hollow channel rear section (126-2) curved inside the filter element (123). Laundry care device (100) according to Claim 5 , characterized in that the hollow channel front section (126-1) extends parallel to the first hollow channel (125-1) and / or that the hollow channel rear section (126-2) extends at an angle to the first hollow channel (125-1). Laundry care device (100) according to one of the preceding claims, characterized in that the first hollow channel (125-1) has a first flow cross section (131-1), that the second hollow channel (125-2) has a second flow cross section (131-2) , wherein the second flow cross section (131-2) is smaller than the first flow cross section (131-1). Laundry care device (100) according to any one of the preceding claims, characterized in that the filter element (123) has a first connecting piece (129-1) which delimits the first hollow channel (125-1), and that the filter element (123) has a second connecting piece (129-2) which delimits the second hollow channel (125-2), the first connecting stub (129-1) and the second connecting stub (129-2) being arranged at an angle to one another. Laundry care device (100) according to Claim 8 , characterized in that the constriction (127) is shaped as an annular gap of the filter element (123), wherein the annular gap runs around the first connecting stub (129-1) at least in sections, and wherein the annular gap the first hollow channel (125-1) with the second hollow channel (125-2) fluidly connects. Laundry care device (100) according to Claim 9 , characterized in that the annular gap is designed as a spiral annular gap, the spiral annular gap running around the first connecting piece (129-1) at least in sections in a spiral shape. Laundry care device (100) according to one of the preceding claims, characterized in that the pump (105), in particular a pumping device (112-1) of the pump (105), is designed to drain the washing liquid through the first hollow channel (125-1) during a pumping process. to convey in a first flow direction (135-1), and that the pump (105), in particular a pumping device (112-2) of the pump (105), is designed to convey the washing liquid during a pumping process through the second hollow channel (125-2) to promote in a second flow direction (135-2), the filter element (123), in particular the Constriction (127), is designed to deflect washing liquid from the first hollow channel (125-1) into the second hollow channel (125-2) during the pumping process. Laundry care device (100) according to one of the preceding claims, characterized in that a partition (139-1) is arranged between the suction chamber (107) and the pumping pressure chamber (111) in order to separate the suction chamber (107) from the pumping pressure chamber (111), wherein the partition (139-1) has an opening (141-1), in particular a central, concentric opening (141-1), in order to fluidically connect the suction chamber (107) and the pump-out pressure chamber (111) to one another. Laundry care device (100) according to one of the preceding claims, characterized in that a further partition (139-2) is arranged between the pumping pressure chamber (111) and the pumping pressure chamber (115) in order to separate the pumping pressure chamber (111) from the pumping pressure chamber (115) , wherein the further partition (139-2) has a further opening (141-2) in order to fluidically connect the pump-out pressure chamber (111) and the pump-over pressure chamber (115) to one another, the second hollow channel (125-2) with the further opening (141-2) is fluidly connected. Laundry care device (100) according to one of the preceding claims, characterized in that the pump (105) has a further filter element which is received in the suction chamber (107), the further filter element being designed to filter impurities from the washing liquid, the first hollow channel (125-1) of the filter element (123) arranged in the pump-out pressure chamber (111) is arranged downstream of the further filter element arranged in the suction chamber (107). Laundry care device (100) according to one of the preceding claims, characterized in that the first and second hollow channels (125-1, 125-2) each have a semicircular cross-section and the first and second hollow channels (125-1, 125-2) are at least are arranged in sections next to one another in the filter element (123), or that the first and second hollow channels (125-1, 125-2) have a circular cross-section, the first hollow channel (125-1) in the second hollow channel (125-2) is arranged, or that the first hollow channel (125-1) has a circular cross section, and the second hollow channel (125-2) has a kidney-shaped cross section, the first and second hollow channel (125-1, 125-2) at least partially next to each other in the filter element (123) are arranged.

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