Domestic dishwasher comprising a pump device, and pump device for a water-conducting domestic appliance

Abstract

The invention relates to a domestic dishwasher (1) comprising: a washing container (2) for receiving washware (G); a hydraulic circuit (33) for circulating rinsing solution and / or fresh water (F) in the washing container (2); and a pump device (19) for applying the rinsing solution and / or fresh water (F) to the hydraulic circuit (33), wherein: the pump device (19) comprises a water deflector (23), integrated into a housing (35) of the pump device (19), for selectively distributing the rinsing solution and / or the fresh water (F) to a plurality of fluid branch pipes (51, 52, 53, 54) of the pump device (19); the water deflector (23) comprises a water-deflector disc (57); the water-deflector disc (57) comprises an annular disc (58) and a drive ring (59) for driving the annular disc (58); and the annular disc (58) and the drive ring (59) are two components which are separate from one another.

Description

[0001] Household dishwasher with a pumping device and pumping device for a water-conducting household appliance

[0002] The present invention relates to a household dishwasher.

[0003] A dishwasher has a wash tub in which wash items can be accommodated. Spray zones can be provided in the wash tub to apply wash liquor and / or fresh water to the wash items. The spray zones can, for example, be designed as spray arms rotatably mounted in or on the wash tub. To supply the spray zones with wash liquor and / or fresh water, the dishwasher has a circulating pump. The wash liquor and / or fresh water are distributed to the spray zones with the aid of a so-called water diverter. The aforementioned circulating pump draws in the wash liquor and / or fresh water from a pump sump of the dishwasher. A motor shaft with an impeller of the circulating pump is usually arranged horizontally and pumps the wash liquor and / or fresh water into the water diverter or directly to the spray zones via a pump housing, which may also have a heater integrated into it.

[0004] Against this background, it is an object of the present invention to provide an improved household dishwasher.

[0005] Accordingly, a household dishwasher is proposed, comprising a wash tub for holding wash ware, a hydraulic circuit for circulating wash liquor and / or fresh water in the wash tub, and a pumping device for supplying the hydraulic circuit with the wash liquor and / or fresh water. The pumping device has a water diverter integrated into a housing of the pumping device for selectively distributing the wash liquor and / or fresh water to a plurality of fluid outlets of the pumping device. The water diverter has a water diverter disc. The water diverter disc has an annular disc and a drive ring for driving the annular discs. The annular disc and the drive ring are two separate components. Because the annular disc and the drive ring are two separate components, it is possible to manufacture the water diverter disc more easily.This reduces the cost of manufacturing the water diverter disc. Furthermore, it is possible to mount the annular disc on the drive ring in a floating manner, allowing the annular disc to float on the rinse liquor and / or fresh water during operation of the pumping device, for example, to seal selected fluid outlets fluid-tight. The floating mounting of the annular disc allows it to be decoupled from the bearing play of a water diverter drive. The complexity of the water diverter discs is reduced. Furthermore, the water diverter disc is also easier to repair, as the annular disc or the drive ring can be replaced individually, for example.

[0006] The wash tub is preferably cuboid-shaped. The wash tub can be closed by means of a door pivoted onto the wash tub. Several washware receptacles, for example, a lower basket, an upper basket, and a cutlery drawer, can be provided within the wash tub. The washware is accommodated in the receptacles, which are then subjected to wash liquor and / or fresh water via the hydraulic circuit. "Surface" in this case can include spraying or wetting the washware. "Wash liquor" in this case refers to water containing a cleaning agent and / or dirt particles removed from the washware.

[0007] The hydraulic circuit can comprise multiple spray devices, for example in the form of spray arms and / or intensive spray zones, arranged within the rinsing tank. The spray devices can be rotatably mounted within the rinsing tank. The spray devices are connected to the fluid outlets of the pumping device via supply lines. The pumping device can be part of the hydraulic circuit, but this is not mandatory.

[0008] The fact that the pumping device "charges" the hydraulic circuit with rinsing solution and / or fresh water means, in this case, in particular that the pumping device pumps the rinsing solution and / or fresh water through the hydraulic circuit. The pumping device is, in particular, a circulation pump, preferably a heating pump. The pumping device can therefore also be referred to as a circulation pump or a heating pump. Particularly preferably, the pumping device is a compact heating pump and can therefore also be referred to as such.

[0009] The pumping device is configured to circulate wash liquor and / or fresh water in the wash tank or in the hydraulic circuit. Furthermore, the pumping device can also be configured to introduce heat into the wash liquor and / or fresh water. The pumping device can be attached to a pump sump of the household dishwasher. The pumping device can be positioned entirely or at least partially below the pump sump.

[0010] The pumping device preferably has a central axis that can be oriented along a direction of gravity. The pumping device is preferably constructed substantially rotationally symmetrically to its central axis. "Substantially" means that parts of the pumping device are constructed rotationally symmetrically to the central axis, although it cannot be ruled out that other parts of the pumping device are not constructed rotationally symmetrically to the central axis. The central axis is oriented, in particular, parallel to the direction of gravity.

[0011] In this case, the fact that the central axis is "oriented" along the direction of gravity or parallel to the direction of gravity can mean, in particular, that the central axis is inclined or tilted relative to the direction of gravity by up to ± 20°, preferably by up to ± 10°, more preferably by up to ± 5°, more preferably by up to ± 3°, more preferably by up to ± 1°. However, the central axis can also run exactly along the direction of gravity, so that no tilting or inclination relative to the direction of gravity occurs. Depending on the installation situation, a suitable slight tilt or inclination can be selected.

[0012] The housing of the pump device is preferably made up of several parts. For example, the housing can have a lower housing part, an upper housing part, and an inner housing part. The lower housing part, the upper housing part, and / or the inner housing part can be plastic components, in particular injection-molded plastic components. This allows the pump device to be manufactured cost-effectively. The lower housing part, the upper housing part, and / or the inner housing part can be connected to one another in a form-fitting manner. A form-fitting connection is created by the interlocking or engaging of two components. Latching hooks, snap hooks, or the like can be provided to create the form-fitting connection.

[0013] In this case, the fact that the water diverter is "integrated" into the housing means, in particular, that the water diverter is at least partially located within the housing. However, it is possible that the housing is at least partially part of the water diverter. For example, the aforementioned inner housing part and the upper housing part are at least partially part of the water diverter. The water diverter is thus not spatially separated from the pumping device.

[0014] The water diverter makes it possible to distribute the rinsing solution and / or fresh water to the various fluid outlets. Selected fluid outlets can be blocked or released. The water diverter disc, particularly the circular disc, is rotatably mounted in the housing for this purpose. As previously mentioned, the fluid outlets are fluidly connected to the spray devices. The water diverter thus makes it possible to specifically supply individual spray devices with rinsing solution and / or fresh water. Furthermore, it is also possible to supply all spray devices with rinsing solution and / or fresh water simultaneously.

[0015] The water diverter disc is, in particular, two-part and comprises the circular disc and the drive ring. The fact that the circular disc and the drive ring are two "separate" components means in this case that the circular disc and the drive ring can be manufactured separately and joined together to form the water diverter disc. However, the connection between the circular disc and the drive ring is preferably designed such that the circular disc and the drive ring can be joined and separated as often as desired. Accordingly, the term "separate" does not preclude the circular disc and the drive ring from being detachably connected.

[0016] According to one embodiment, the pumping device has a central axis oriented along a direction of gravity. According to another embodiment, the annular disc and the drive ring are positively connected to one another.

[0017] This allows the circular disc and the drive ring to be connected to each other as desired, as well as the connection between the circular disc and the drive ring to be released as desired.

[0018] According to a further embodiment, the circular disc has recesses, wherein the drive ring has drivers corresponding to the recesses, and wherein the drivers engage positively in the recesses.

[0019] The number of recesses and the number of drivers are arbitrary. Particularly preferred are three recesses and three drivers. The number of recesses preferably corresponds to the number of drivers. The recesses are provided in particular on an outer circumference of the annular disc. The recesses can be rectangular. With the help of the drivers and the recesses, torque can be transmitted from the drive ring to the annular disc.

[0020] According to a further embodiment, the recesses and the drivers are arranged unevenly distributed around the central axis. Alternatively, at least one of the recesses and at least one of the drivers has a width that differs from the other recesses and the other drivers.

[0021] This creates a coding system when assembling the circular disc and the drive ring, preventing incorrect assembly of the water diverter disc (Poka-Yoke). Alternatively, the recesses and the drivers can also be evenly distributed around the central axis. In this case, the coding can be achieved by having at least one of the recesses and at least one of the drivers with a different width than the other recesses and drivers. For example, the at least one recess and at least one driver are wider than the remaining recesses and drivers.According to a further embodiment, the annular disc is designed to float on the rinsing liquor and / or the fresh water during operation of the pump device, wherein the positive connection between the annular disc and the drive ring is designed such that the positive connection between the annular disc and the drive ring is maintained when the annular disc floats.

[0022] As the annular disc floats upwards, it can be pressed internally against a cover plate of the housing's interior to reliably seal fluid outlets that need to be closed. Specifically, the annular disc is lifted from one end face of the drive ring during the floatation process, creating a space filled with rinsing solution and / or fresh water between the end face and the annular disc. This space is bridged, in particular, by the drivers, allowing them to transmit torque to the annular disc even while it floats upwards.

[0023] According to a further embodiment, all fluid outlets are oriented along the central axis.

[0024] The fluid outlets are preferably tubular. The fluid outlets can be part of the water diverter. The fluid outlets can have a circular, oval, or elliptical cross-section. The fact that the fluid outlets are "oriented" along the central axis means, in particular, that the fluid outlets extend out of the housing along the central axis or along an axial direction of the pumping device. The axial direction is oriented parallel to the central axis or coincides with it. A radial direction of the pumping device, on the other hand, is arranged, in particular, perpendicular to the central axis or perpendicular to the axial direction. The pumping device preferably has no fluid outlets that are oriented perpendicular to the central axis and thus along the radial direction. All or all of the fluid outlets of the pumping device run along the central axis or along the axial direction.According to a further embodiment, the annular disc has openings for selectively releasing individual, several or all fluid outlets.

[0025] The openings can be circular. However, they can also have a slotted geometry. The number of openings is arbitrary. In particular, the number of openings corresponds to the number of fluid outlets.

[0026] According to a further embodiment, the drive ring has a toothing on the outside that runs at least in sections around the central axis.

[0027] The drive ring or the water diverter discs are thus not driven centrally, but rather externally or circumferentially. The gearing can be helical. The gearing can, in particular, be globoidal. The gearing can completely revolve around the central axis. However, this is not mandatory. Partial gearing can also be provided.

[0028] According to a further embodiment, the water switch has a water switch drive for driving the drive ring, wherein a drive shaft of the water switch drive is oriented perpendicular to the central axis.

[0029] In this context, "perpendicular" is understood to mean an angle of 90° ± 10°, preferably 90° ± 5°, more preferably 90° ± 3°, more preferably 90° ± 1°, more preferably exactly 90°. The water diverter drive is an electric motor. The water diverter drive is preferably a so-called wet rotor. The water diverter drive preferably comprises a first housing part, which is integrally formed on the upper housing part of the housing of the pumping device. A second housing part is positively connected to the first housing part, in particular latched or snapped, with the second housing part closing the first housing part. The housing parts enclose an interior space, which is filled with rinsing liquor and / or fresh water during operation of the pumping device. The water diverter drive further comprises a stator attached to the outside of the second housing part and a rotatable rotor arranged within the interior space.The rotor is non-rotatably connected to the drive shaft, which in turn is rotatably mounted on the two housing parts. According to another embodiment, the water diverter drive has a worm gear attached to the drive shaft that engages the gearing.

[0030] The gearing and the worm gear preferably have globoidal gearing. Using a worm drive to drive the water diverter disc causes the worm to remove contaminants from the gearing of the drive ring. This results in increased operational reliability.

[0031] According to a further embodiment, the water diverter disc has a central opening through which a part of the housing is passed.

[0032] The opening is provided in particular on the annular disc. The water diverter disc is preferably annular, with the central opening being in particular circular. For example, a part of the housing inner part is passed through this central opening. The water diverter disc can thus be rotatably mounted at its opening on the housing, in particular on the housing inner part. The pump device preferably has a drive motor with a rotor for driving an impeller of the pump device and a stator, wherein the rotor is received in a first receiving section of the housing, wherein the stator is received in a second receiving section of the housing, and wherein the second receiving section is passed through the opening. Preferably, the first receiving section and the second receiving section are part of the housing inner part.The first receiving section is pot-shaped and closed in the direction of the impeller by means of a closure. The first receiving section encloses a receiving space in which the rotor is accommodated. The rotor is connected in a rotationally fixed manner to a drive shaft of the drive motor. The impeller is likewise connected in a rotationally fixed manner to the drive shaft. The drive shaft is rotatably mounted on the first receiving section and on the closure. The second receiving section is preferably also pot-shaped. The first receiving section and the second receiving section are arranged in opposite directions so that the second receiving section is open facing away from the impeller. The second receiving section encloses an annular receiving space in which the stator of the drive motor is accommodated. The stator can, for example, be glued to the first receiving section and / or to the second receiving section.

[0033] According to a further embodiment, the water diverter disc is mounted on the inside of the opening by means of guide sections formed on the housing.

[0034] In particular, the circular disc is mounted on the inside of the opening by means of the guide sections. The number of guide sections is arbitrary. However, three guide sections are particularly preferably provided, which can be evenly distributed around the central axis. The guide sections are, in particular, part of the inner housing. Between the guide sections, rinsing solution and / or fresh water can flow radially inward from the water diverter disc toward the central axis. However, instead of the spaced-apart guide sections, a continuous annular guide section can also be provided.

[0035] According to a further embodiment, the drive ring is received in an annular groove provided in the housing.

[0036] The annular groove is preferably molded onto the upper housing section. The annular groove is filled with rinsing solution and / or fresh water. The drive ring is located in the annular groove. The annular groove runs completely around the center axis of the pumping device.

[0037] According to a further embodiment, the housing has a drainage opening pointing in the direction of the central axis, which is in fluid communication with the annular groove.

[0038] Exactly one drainage opening can be provided. However, multiple drainage openings can also be provided. Rinse solution and / or fresh water can flow out of the annular groove through the drainage opening. The fact that the drainage groove is "fluidically connected" to the annular groove means, in this case, in particular, that the rinse solution and / or fresh water can flow out of the annular groove through the drainage groove toward the central axis. According to a further embodiment, the drive ring is rotatably mounted on guide webs that project radially into the annular groove.

[0039] This allows for reduced friction when the drive ring rotates. The number of guide webs is arbitrary. However, at least three guide webs are preferably provided. However, four or more than four guide webs can also be provided. The guide webs extend into the annular groove in the radial direction.

[0040] According to an advantageous development of the invention, the housing of the pumping device according to the invention has a liquid conveying channel in its interior. Viewed from bottom to top along the central axis, the functional sections of the liquid conveying channel of the pumping device according to the invention include, at successive heights, a pump inlet, a pump chamber or impeller chamber with an impeller or rotor that can be driven to rotate therein for conveying the rinsing liquid, a pressure and / or diffuser chamber arranged downstream of the pump chamber, a water diverter element that can be rotated about the central axis in the upper end section of the pressure and / or diffuser chamber, and the plurality of fluid outlets of the pumping device. The term "liquid conveying channel" is understood to mean the cavity provided in the housing of the pumping device according to the invention, which is filled and flowed through by the rinsing liquid during conveying operation of the pumping device.Due to this vertical sequence of the various functional sections of the liquid conveying channel of the pumping device according to the invention, the flushing liquid is guided from the pump inlet to the outlet opening of the respective fluid outlet in the housing, rising from bottom to top, against the direction of gravity. Deflections and / or reflections of the flushing liquid with a directional component in the direction of gravity, i.e. in the opposite direction to its bottom-up conveying direction, are largely avoided. A retrograde flow of the flushing liquid conveyed by the impeller on its way through the liquid conveying channel from bottom to top is therefore largely avoided. In addition, the sequential arrangement of the various functional sections of the liquid conveying channel is advantageous for a simple design and the associated simple manufacture of the pumping device according to the invention. Conversely, this can bein the event of repair, it can be easily disassembled and every essential component of the pump device according to the invention is accessible. Furthermore, this sequence of the various functional sections of the liquid conveying channel ensures that the flushing liquid can flow completely downwards via the pump inlet solely through the effect of gravity when the drive motor for the impeller is switched off and the impeller is stationary. To ensure that the liquid conveying channel runs completely dry, it is particularly advantageous if the pump inlet is expediently provided at the lowest point of the pump device according to the invention. This prevents residual water from remaining in the liquid conveying channel of the housing of the pump device according to the invention when the drive motor of its impeller is out of operation.As a result, there is little or no risk of dirty water and / or lye carryover when changing from one partial wash cycle, such as the cleaning cycle, to the subsequent partial wash cycle, such as the intermediate rinse cycle or final rinse cycle of the wash cycle of a dishwashing program. This is because, when changing the rinse bath, the rinse liquid used for the respective partial wash cycle can now flow at least almost completely out of the pump device according to the invention and be removed from the hydraulic circuit, in particular by pumping out the pump sump using a drain pump. New rinse liquid, in particular fresh water, can be supplied to the hydraulic circuit for the next partial wash cycle without this being able to mix with dead or residual water from the previous partial wash cycle. As a result, fewer or no stains from dirt particles, limescale particles, etc., remain on the rinsed and subsequently dried items.more available, resulting in improved rinsing results. In particular, the intermediate rinse cycle previously required between the cleaning cycle and the final rinse cycle can now be carried out with a smaller amount of fresh water, if necessary, or even eliminated entirely, since rinsing out residual or dead water contaminated with dirt particles and / or cleaning agents from the pumping device is no longer absolutely necessary.

[0041] According to an alternative development of the invention, a liquid conveying channel, in particular a diffuser chamber, can be formed in the housing of the pumping device, which, viewed along a radial direction of the pumping device, is delimited by the second receiving section and a housing outer part running around the second receiving section, wherein at least one tubular heating element is accommodated in this liquid conveying channel.

[0042] According to an alternative development of the invention, the housing can have an outer housing part, in particular a one-piece or single-piece housing part, which delimits the liquid conveying channel, which is at least almost rotationally symmetrical to the central axis, to the outside, in particular up to the fluid outlets, wherein at least one tubular heater is accommodated in the liquid conveying channel. This can further simplify the structure or design of the pumping device according to the invention. It may already be sufficient if the housing of the pumping device consists of only two parts - the outer housing part and the inner housing part. At most, a cover part can also be provided with which the upper opening of the inner housing part can be closed. This allows the stator accommodated in the inner housing part between its first receiving section and second receiving section to be reliably protected against moisture and / or rinsing fluid.The outer housing part and the inner housing part inserted into or immersed in it can be mechanically connected to each other, for example, by a snap-in, locking, and / or bayonet connection and / or other coupling. The fact that at least one tubular heating element is housed in the fluid conveying channel formed between the inner housing part and the outer housing part also improves heat transfer between the tubular heating element and the flushing fluid conveyed from bottom to top through the fluid conveying channel by means of the impeller or pump wheel of the pumping device.

[0043] In particular, the second receiving section forms at least a partial section of the inner boundary wall of the liquid conveying channel.

[0044] The tubular heater is expediently provided downstream of the impeller of the pumping device in the fluid conveying channel along its flow path, in particular arranged at least virtually rotationally symmetrically to the central axis, preferably at least virtually concentrically to the second receiving section. It is expediently arranged symmetrically with respect to the central axis of the preferably circular-cylindrical fluid conveying channel such that, viewed in the respective passage cross-sectional plane of the fluid conveying channel, at least approximately the same gap width results between the tubular heater and the inner boundary wall of the fluid conveying channel formed by the inner housing part, as well as between the tubular heater and the outer boundary wall of the fluid conveying channel formed by the outer housing part, for the rinsing fluid flowing through there.This allows the tubular heater to be supplied with a largely uniform flow of the pumped flushing liquid, which is beneficial for the transfer of heat from the tubular heater to the flushing liquid flowing past it.

[0045] In particular, it may be sufficient and / or advantageous if the tubular heater is accommodated in the liquid conveying channel with only approximately one turn or partial turn section and runs around the central axis, preferably around the second receiving section of the housing inner part. In this way, impairments of the flow conditions caused by the tubular heater in the liquid conveying channel can be minimized or largely avoided. In this regard and / or also from a structural point of view, it may be particularly advantageous if the turn or partial turn section of the tubular heater is arranged at least approximately horizontally or in a plane orthogonal to the central axis. However, it is also possible for the tubular heater to run around the central axis in the liquid conveying channel with more than one turn, e.g. if a higher heat transfer to the rinsing liquid is required.

[0046] Furthermore, the invention can also relate to a water-conveying pumping device per se for a water-conducting household appliance, in particular for a household dishwasher as described above and / or configured according to claims 1 to 15, according to claim 16. Such a pumping device according to the invention can be implemented in particular in washing machines, tumble dryers, or other water-conducting household appliances. It can be configured in particular as described above and / or according to claims 1 to 15.

[0047] Further possible implementations of the household dishwasher also include combinations of features or embodiments described above or below with regard to the exemplary embodiments that are not explicitly mentioned. In this case, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the household dishwasher.

[0048] Further advantageous configurations and aspects of the household dishwasher are the subject of the dependent claims and the exemplary embodiments of the household dishwasher described below. The household dishwasher is explained in more detail below using preferred embodiments with reference to the accompanying figures.

[0049] Fig. 1 shows a schematic perspective view of an embodiment of a household dishwasher;

[0050] Fig. 2 shows a schematic sectional view of the household dishwasher according to Fig. 1;

[0051] Fig. 3 shows a schematic sectional view of an embodiment of a pumping device for the household dishwasher according to Fig. 1;

[0052] Fig. 4 shows a schematic plan view of the pumping device according to Fig. 3;

[0053] Fig. 5 shows a schematic plan view of an embodiment of a water diverter disc for the pumping device according to Fig. 3;

[0054] Fig. 6 shows a schematic sectional view of the water diverter disc according to Fig. 5;

[0055] Fig. 7 shows a schematic perspective exploded view of the water diverter disc according to Fig. 5;

[0056] Fig. 8 shows a schematic perspective view of an embodiment of a drive ring for the water diverter disc according to Fig. 5;

[0057] Fig. 9 shows a schematic sectional view of an embodiment of a water diverter for the pumping device according to Fig. 3; Fig. 10 shows a schematic sectional view of an embodiment of a fluid outlet for the pumping device according to Fig. 3;

[0058] Fig. 11 shows a schematic plan view of an embodiment of a sealing device for the pumping device according to Fig. 3;

[0059] Fig. 12 shows a schematic sectional view of the sealing device according to Fig. 11;

[0060] Fig. 13 shows a schematic plan view of an embodiment of a blank for producing a stator of a drive motor and a stator of a water switch drive for the pumping device according to Fig. 3;

[0061] Fig. 14 shows an embodiment of an assembly from the blank according to Fig. 13; and

[0062] Fig. 15 shows a schematic sectional view of a variant of a pumping device in the hydraulic circuit of the household dishwasher according to Figs. 1 and 2, which is modified compared to the advantageous embodiment of Fig. 3.

[0063] In the figures, identical or functionally equivalent elements have been given the same reference numerals unless otherwise stated.

[0064] Fig. 1 shows a schematic perspective view of an embodiment of a household dishwasher 1. The household dishwasher 1 comprises a washing container 2, which can be closed by a door 3, in particular in a watertight manner. For this purpose, a sealing device can be provided between the door 3 and the washing container 2. The washing container 2 is preferably cuboid-shaped. The washing container 2 can be arranged in a housing of the household dishwasher 1. The washing container 2 and the door 3 can form a washing chamber 4 for washing dishes.

[0065] The door 3 is shown in its open position in Fig. 1. The door 3 can be closed or opened by pivoting about a pivot axis 5 provided at a lower end of the door 3. With the help of the door 3, a loading opening 6 of the washing container 2 can be closed or opened. The washing container 2 has a base 7, a ceiling 8 arranged opposite the base 7, a rear wall 9 arranged opposite the closed door 3 and two side walls 10, 11 arranged opposite one another. The base 7, the ceiling 8, the rear wall 9 and the side walls 10, 11 can be made, for example, from a stainless steel sheet. Alternatively, the base 7 can be made, for example, from a plastic material.

[0066] The household dishwasher 1 further comprises at least one dishware receptacle 12 to 14. Preferably, several, for example three, dishware receptacles 12 to 14 can be provided, wherein the dishware receptacle 12 can be a lower dishware receptacle or a lower basket, the dishware receptacle 13 can be an upper dishware receptacle or an upper basket, and the dishware receptacle 14 can be a cutlery drawer. As Fig. 1 further shows, the dishware receptacles 12 to 14 are arranged one above the other in the washing compartment 2. Each dishware receptacle 12 to 14 can be selectively moved into or out of the washing compartment 2. In particular, each dishware receptacle 12 to 14 can be pushed or moved into the washing compartment 2 in an insertion direction E and pulled or moved out of the washing compartment 2 in a pull-out direction A opposite to the insertion direction E.

[0067] Fig. 2 shows a highly schematic sectional view of the household dishwasher 1. In addition to the washing container 2, the household dishwasher 1 comprises a base support 15, which supports the washing container 2. The base support 15 is, for example, a plastic component, in particular an injection-molded plastic component.

[0068] A pump sump 16 is provided on the base 7. The pump sump 16 is pot-shaped and, in the orientation of Fig. 2, extends downwards out of the base 7. The pump sump 16 can be a plastic component, in particular a plastic injection-molded component. A tubular drain 17 issues from the pump sump 16. The pump sump 16 is covered by a sieve system 18. The sieve system 18 can comprise a coarse filter and a fine filter. A pump device 19 is connected to the drain 17. The pump device 19 is a circulating pump, in particular a heating pump, and can therefore also be referred to as such. Particularly preferably, the pump device 19 is a compact heating pump and can therefore also be referred to as such. The pump device 19 is designed to circulate washing liquor and / or fresh water F. Furthermore, the pumping device 19 is also designed to introduce heat into the rinsing liquor and / or the fresh water F.The pumping device 19 can be attached to the pump sump 16. The pumping device 19 is preferably arranged completely or at least partially below the pump sump 16.

[0069] The pumping device 19 is constructed essentially rotationally symmetrically to a symmetry or central axis 20. The central axis 20 is oriented parallel to a direction of gravity g. The pumping device 19 has a pump 21, which is fluidly connected to the outlet 17 by means of an intake port 22, so that the pumping device 19 can suck in rinsing solution and / or fresh water F from the pump sump 16 via the intake port 22 and the outlet 17.

[0070] In addition to the pump 21, the pumping device 19 has a water diverter 23 integrated into the pumping device 19. With the aid of the water diverter 23, it is possible to selectively distribute the rinsing liquor and / or fresh water F delivered by the pumping device 19 to different spray devices 24, 25, 26 provided in the rinsing container 2. With the aid of the water diverter 23, the spray devices 24, 25, 26 can be selectively supplied with rinsing liquor and / or fresh water F or not.

[0071] The spray devices 24, 25 can be spray arms, whereas the spray device 26 can be a roof rotor. In addition, switchable intensive spray zones or a screen cleaning nozzle (not shown) can be provided. For example, the spray device 24 is mounted below the washware receptacle 12 so as to be rotatable about a rotation axis 27 on the floor 7, on the pump sump 16, or on the pump device 19. The spray device 24 has spray nozzles which spray the wash liquor and / or the fresh water F upwards into the washware receptacle 12 in the orientation shown in Fig. 2. The spray device 25 can be mounted on the washware receptacle 13 so as to be rotatable about a rotation axis 28. The spray device 25 also has spray nozzles which are designed to spray the wash liquor and / or the fresh water F downwards and / or upwards in the orientation shown in Fig. 2. The spray device 26 can be mounted on the ceiling 8 so as to be rotatable about a rotation axis 29.The spray device 26 applies washing liquor and / or fresh water F to the dishware holder 14 from above in the orientation of Fig. 2.

[0072] The spray device 24 is fluidly connected to the pumping device 19, in particular to the water diverter 23, by means of a supply line 30. The pumping device 19 can supply the spray device 24 with rinsing solution and / or fresh water F via the supply line 30.

[0073] The spray device 25 is assigned a supply line 31, which fluidically connects the spray device 25 to the pump device 19. The pump device 19 can supply the spray device 25 with rinsing solution and / or fresh water F via the supply line 31.

[0074] The spray device 26 is assigned a supply line 32, which fluidically connects the spray device 26 to the pump device 19. The pump device 19 can supply the spray device 26 with rinsing solution and / or fresh water F via the supply line 32.

[0075] Each spray device 24, 25, 26 can be assigned its own supply line 30, 31, 32. Alternatively, all spray devices 24, 25, 26 can have a common supply line that branches out. In particular, the supply lines 30, 31, 32 are formed by a common component, in particular a common plastic injection-molded component. The supply lines 30, 31, 32 are routed along the rear wall 9 from the floor 7 toward the ceiling 8. The supply lines 30, 31, 32, or at least some of the supply lines 30, 31, 32, can be routed through the screening system 18.

[0076] The pumping device 19 preferably has a separate connection or fluid outlet for each supply line 30, 31, 32. The pumping device 19, the spray devices 24, 25, 26, and the supply lines 30, 31, 32 together form a hydraulic circuit 33 of the household dishwasher 1. The pumping device 19 circulates the wash liquor and / or the fresh water F in this hydraulic circuit 33. The pumping device 19 can be part of the hydraulic circuit 33. However, this is not mandatory.

[0077] The household dishwasher 1 further comprises a control and regulation device 34. With the aid of the control and regulation device 34, for example, different washing programs of the household dishwasher 1 can be executed. For this purpose, washing programs can be stored or stored in the control and regulation device 34. The control and regulation device 34 is preferably arranged outside the washing tub 2.

[0078] The control device 34 can be arranged in or on the door 3. Preferably, the control device 34 is provided on an upper edge of the door 3 (not shown). However, the control device 34 can also be accommodated in the base support 15. The control device 34 can be operated or actuated using control elements (not shown). The control elements can include, for example, buttons, knobs, and / or touchscreens. These can be attached to the door 3.

[0079] The pumping device 19 can be controlled by means of the control and regulation device 34. For example, the pump 21 can be switched on and off and / or its speed can be changed using the control and regulation device 34. The control and regulation device 34 can receive and evaluate information from the pumping device 19, such as the speed of the pump 21 and / or a motor current of the pump 21. Furthermore, the control and regulation device 34 can also control the water diverter 23 to selectively switch the spray devices 24, 25, 26 on or off.

[0080] Dishware G to be cleaned is arranged in the washing container 2. The dishware G can include, for example, glasses, plates, pots, bowls, cutlery, or the like. In particular, the dishware G is received in the dishware receptacles 12, 13, 14 (not shown in Fig. 2). With the aid of the spray devices 24, 25, 26, the dishware G can be exposed to dishwashing liquid and / or fresh water F. Fig. 3 shows a schematic sectional view of an embodiment of a pumping device 19 as mentioned above. The pumping device 19 is assigned an axial direction AX, which extends from bottom to top in the orientation of Fig. 3. The axial direction AX coincides with the central axis 20 or is oriented parallel to it. Furthermore, the pumping device 19 is assigned a radial direction R. The radial direction R is oriented perpendicular to the central axis 20 and away from it. The axial direction AX and the radial direction R are thus oriented perpendicular to one another.

[0081] As previously mentioned, the pumping device 19 comprises the pump 21 and the water diverter 23. The pumping device 19 differs from the pump 21 in that the pumping device 19 also comprises the water diverter 23 in addition to the pump 21.

[0082] The pump device 19 comprises a housing 35 with a lower housing part 36, an upper housing part 37, and an inner housing part 38. The lower housing part 36 has a pump inlet 39 to which the intake port 22 is connected. For example, the intake port 22 is plugged onto the pump inlet 39 and sealed therefrom by means of a sealing element, for example in the form of an O-ring. The housing 35 is constructed essentially rotationally symmetrically to the central axis 20.

[0083] A tubular heating element 40 is positioned between the lower housing portion 36 and the upper housing portion 37. The tubular heating element 40 is preferably a thick-film heating element. The tubular heating element 40 is sealed against the lower housing portion 36 and the upper housing portion 37 by means of sealing elements, for example in the form of O-rings. The tubular heating element 40 is tubular or hollow-cylindrical. The tubular heating element 40 is rotationally symmetrical to the central axis 20. The tubular heating element 40 is thus held between the lower housing portion 36 and the upper housing portion 37. During operation of the pumping device 19, the rinsing solution and / or the fresh water F flows along the inside of the tubular heating element 40.

[0084] The lower housing part 36 and the upper housing part 37 are positively connected to one another (not shown). For this purpose, locking hooks, snap hooks, or the like can be provided, which enable a positive connection of the lower housing part 36 to the upper housing part 37. A positive connection is created by two connecting partners engaging one inside the other or behind one another, in this case the lower housing part 36 and the upper housing part 37. The inner housing part 38 is positively connected to the upper housing part 37. Corresponding locking hooks, snap hooks, or the like are also provided for this purpose. The lower housing part 36, the upper housing part 37, and the inner housing part 38 are plastic components, in particular injection-molded plastic components.

[0085] The lower housing section 36 accommodates an impeller 41, which is arranged downstream of the pump inlet 39. The impeller 41 is driven by a drive motor 42. The drive motor 42 is an electric motor. The impeller 41 can also be referred to as an impeller. The drive motor 42 comprises a drive shaft 43 that is non-rotatably connected to the impeller 41 and rotates about the central axis 20 during operation of the pump device 19. In addition to the impeller 41, a rotor 44 of the drive motor 42 is non-rotatably connected to the drive shaft 43.

[0086] The rotor 44 is rotatably mounted about the central axis 20 in a cup-shaped first receiving section 45 of the housing inner part 38. The first receiving section 45 encloses a receiving space 46 in which the rotor 44 is received. The receiving space 46 can be filled with rinsing liquor and / or fresh water F. The first receiving section 45 is closed with a closure 47 in the orientation of Fig. 3, i.e., in the direction of the impeller 41. The drive shaft 43 is guided through the closure 47 and can be mounted on it.

[0087] In addition to the first receiving section 45, the housing inner part 38 comprises a second receiving section 48. The second receiving section 48 is also pot-shaped. In contrast to the first receiving section 45, however, the second receiving section 48 is open at the top rather than the bottom in the orientation of Fig. 3. The first receiving section 45 is arranged within the second receiving section 48. The second receiving section 48 thus has a larger diameter than the first receiving section 45. An annular receiving space 49 is provided between the first receiving section 45 and the second receiving section 48. A stator 50 of the drive motor 42 is arranged in the receiving space 49. The stator 50 can be adhesively bonded to the first receiving section 45 and / or the second receiving section 48.

[0088] The pump 21 is formed in particular by the drive motor 42, the impeller 41, and at least parts of the housing 35. The tubular heating element 40 can also be part of the pump 21. In particular, the two receiving sections 45, 48 of the housing inner part 38 are part of the pump 21. In contrast, the pump device 19 also has the water diverter 23 in addition to the pump 21.

[0089] Fig. 4 shows a schematic top view of the pump device 19. The housing inner part 38 has a plurality of fluid outlets 51, 52, 53, 54 to which the supply lines 30, 31, 32 are connected. If three spray devices 24, 25, 26 are provided, exactly three fluid outlets 51, 52, 53, 54 are also provided. If, for example, four spray devices 24, 25, 26 are provided, four fluid outlets 51, 52, 53, 54 are also provided.

[0090] In the present case, fluid outlet 51 is assigned to spray device 24. Fluid outlet 51 can also function as a bearing for spray device 24. Fluid outlet 52 is an additional outlet that can, for example, be assigned to an intensive spray zone (not shown). Fluid outlet 53 is assigned to spray device 26, and fluid outlet 54 is assigned to spray device 25. However, the assignment can also be chosen differently.

[0091] The fluid outlets 51, 52, 53, 54 are tubular and extend along the central axis 20 or along the axial direction AX. The fluid outlets 51, 52, 53, 54 can each have a circular, elliptical, or oval cross-section. The rinsing solution and / or the fresh water F can be discharged via the fluid outlets 51, 52, 53, 54 during operation of the pump device 19.

[0092] The fluid outlets 51, 52, 53, 54 extend from a cover plate 55 of the housing inner part 38, which closes off the front of the housing upper part 37. A tubular or hollow-cylindrical connecting section 56 extends around the cover plate 55, by means of which the housing inner part 38 is connected to the housing upper part 37.

[0093] Now returning to Fig. 2, a water diverter disc 57 which is rotatable about the central axis 20 and is also shown in a plan view in Fig. 5 is arranged between the housing inner part 38, in particular the end plate 55, and the housing upper part 37. Fig. 6 shows a schematic sectional view of the water diverter disc 57. Fig. 7 shows a schematic perspective exploded view of the water diverter disc 57. The water diverter disc 57 is in two parts and has an annular disc 58 and a drive ring 59, which is shown in a separate schematic perspective view in Fig. 8.

[0094] The water diverter disc 57 is part of the water diverter 23. The water diverter disc 57 is designed rotationally symmetrically to the central axis 20. The water diverter disc 57 has a central opening 60. The opening 60 is provided in particular on the annular disc 58. The opening 60 is preferably circular. Furthermore, the water diverter disc 57 has several openings 61, 62, 63 penetrating the annular disc 58, with which the fluid outlets 51, 52, 53, 54 can be selectively blocked or opened by rotating the water diverter disc 57.

[0095] The openings 61, 62, 63 can be circular. The openings 61, 62, 63 can be elongated. With the help of the elongated hole geometry, it is possible to release several of the fluid outlets 51, 52, 53, 54 simultaneously. The number of openings 61, 62, 63 can correspond to the number of fluid outlets 51, 52, 53. However, this is not absolutely necessary. With the help of the water diverter disc 57, in particular with the help of the annular disc 58, the fluid outlets 51, 52, 53, 54 can be combined with one another as desired. For example, it is possible to release the fluid outlets 51, 52 and block the fluid outlets 53, 54.

[0096] The water diverter disc 57, in particular the circular ring disc 58, is guided on the inside at its opening 60 by means of guide sections 64, 65, 66 such that the water diverter disc 57 is rotatably mounted about the central axis 20. The number of guide sections 64, 65, 66 is arbitrary. However, three guide sections 64, 65, 66 are particularly preferably provided, which are arranged evenly distributed around the central axis 20. The guide sections 64, 65, 66 are in particular part of the housing inner part 38. Between the guide sections 64, 65, 66, rinse liquor and / or fresh water F can flow radially inward from the water diverter disc 57 in the direction of the central axis 20. However, instead of the spaced-apart guide sections 64, 65, 66, a continuous annular guide section (not shown) can also be provided. In this case, it has a drain opening oriented in the direction of the central axis 20.

[0097] The circular disc 58 has recesses 67, 68, 69 on the outside, facing away from the opening 60. Preferably, exactly three recesses 67, 68, 69 are provided. The recesses 67, 68, 69 are preferably arranged unevenly distributed around the central axis 20.

[0098] The drive ring 59 has an annular base section 70. A circumferential toothing 71, in particular a helical toothing, is attached to the outside of the base section 70. Drivers 73, 74, 75 extend from an end face 72 of the base section 70, which faces upwards in the orientation of Fig. 8. The drivers 73, 74, 75 are designed to positively engage the recesses 67, 68, 69 of the annular disc 58, so that the drive ring 59 is positively connected to the annular disc 58. The drivers 73, 74, 75 are preferably arranged unevenly distributed around the central axis 20, so that when the annular disc 58 and the drive ring 59 are assembled, a coding is implemented that prevents incorrect assembly (Poka Yoke).

[0099] Viewed along the central axis 20 or the axial direction AX, the annular disc 58 can be lifted off the drive ring 59 so that the annular disc 58 can float on the rinsing liquor and / or the fresh water F during operation of the pump device 19. However, the positive connection between the annular disc 58 and the drive ring 59 is retained.

[0100] The water diverter disc 57 or the annular disc 58, which opens and closes the various fluid outlets 51, 52, 53, 54 as desired, is shaped as a circular ring so that it can be guided on an inner starting diameter or bearing diameter and driven on an outer side thereof, as will be explained below. Preferably, an inner diameter of the annular disc 58 is larger than an outer diameter of the stator 50 of the drive motor 42. Due to this arrangement, at least three of the fluid outlets 51, 52, 53, 54 can be opened and closed on the same pitch circle in a corresponding combination. However, four or five fluid outlets 51, 52, 53, 54 are also possible.In addition, it is possible to arrange the fluid outlets 51, 52, 53, 54 geometrically further apart from each other than was possible with previous solutions, which results in shorter paths to the different spray devices 24, 25, 26.

[0101] Fig. 9 shows a schematic sectional view of an embodiment of a water diverter 23 as mentioned above. The water diverter 23 comprises, in addition to the annular disc 58 (not shown) and the drive ring 59, at least a part of the housing inner part 38, namely the fluid outlets 51, 52, 53, 54 and the end plate 55, at least a part of the housing upper part 37 and a water diverter drive 76 for rotating the water diverter disc 57 about the central axis 20, so that the fluid outlets 51, 52, 53, 54 can be selectively blocked and released.

[0102] The water diverter drive 76 has a first housing part 77, which is integrally formed on the upper housing part 37. A second housing part 78 is positively connected to the first housing part 77, in particular by locking or snapping, wherein the second housing part 78 closes the first housing part 77. A sealing element, for example in the form of an O-ring, can be provided between the first housing part 77 and the second housing part 78. The housing parts 77, 78 enclose an interior space 79, which is filled with rinsing solution and / or fresh water F during operation of the pump device 19.

[0103] The water diverter drive 76 further comprises a stator 80 attached to the outside of the second housing part 78, as well as a rotatable rotor 81 arranged within the interior 79. The rotor 81 is connected in a rotationally fixed manner to a drive shaft 82, which in turn is rotatably mounted on the two housing parts 77, 78. A worm gear 83 is attached to the drive shaft 82 and engages with the toothing 71 of the drive ring 59. A lower edge of the worm gear 83 is arranged no lower than a lower edge of the drive ring 59, so that the interior 79 can be drained. The water diverter drive 76 is a wet-running motor. The water diverter drive 76 is an electric motor.

[0104] The drive ring 59 is received in an annular groove 84 filled with rinsing liquor and / or fresh water F, which is integrally formed on the housing upper part 37. A plurality of guide webs 85, 86, 87, 88 project radially into the annular groove 84, on which the drive ring 59 is guided on the inside. The number of guide webs 85, 86, 87, 88 is arbitrary. Preferably, at least three guide webs 85, 86, 87, 88 are provided. The annular groove 84 can be drained via a drainage opening 89 in the direction of the central axis 20. The interior space 79 is in fluid communication with the annular groove 84. Thus, the interior space 79 can also be drained via the annular groove 84 and the drainage opening 89 in the direction of the central axis 20.

[0105] The interior space 79 and the annular groove 84 form a fluid space 90 which is filled with rinsing liquor and / or fresh water F. Within the fluid space 90 are the rotor 81, the drive shaft 82, the worm 83 and the drive ring 59. Thus, no moving seal is required.

[0106] In order to be able to vary the required electrical input power and the direction of rotation of the water switch drive 76, the water switch drive 76 is designed as a brushless motor. In particular, the water switch drive 76 is a permanent synchronous motor (PMSM). Preferably, the water switch drive 76 is a brushless direct current (BLDC) motor. The water switch drive 76 is electronically commutated. A brushless alternating current (BLAC) motor can also be used as the water switch drive 76.

[0107] The water diverter drive 76 is designed as a wet rotor, so that no losses are generated by moving seals during operation of the pump device 19. Furthermore, the worm gear 83 on the output shaft 82 offers the possibility of transmitting a maximum gear ratio and thus the maximum torque with the lowest possible electrical input power to the water diverter disk 57 using only one gear stage. The gear ratio between the worm gear 83 and the drive ring 59 is preferably in the range of 1:50 to 1:250. A hard ferrite ring is preferably used as the material for the rotor 81. This eliminates the need for corrosion protection.

[0108] The advantages of this previously explained arrangement include minimizing losses due to moving seals, no wear on seals over the service life of the pump device 19, and a dirt-tolerant gear system, since the worm 83 removes dirt from the gearing 71 of the drive ring 59 as it rotates. This offers a particular advantage over spur gearing. The worm 83 preferably has globoidal gearing.

[0109] Furthermore, a change in direction of rotation and a change in speed are possible. It is possible to generate the highest possible gear ratio with only one gear stage. The worm 83 can be designed with a single thread. The drive ring 59 has the largest possible diameter to generate the highest possible gear ratio and the greatest possible torque with the smallest possible water switch drive 76. This conserves resources.

[0110] Depending on the motor type selected for the water diverter drive 76, suitable sensor functions can be incorporated. The water diverter drive 76 can be positioned at an angle of 90° or at a specific angle to the drive ring 59, so that no blind holes are created in which rinse liquor and / or fresh water F or dirt can remain. The water diverter 23 is thus insensitive to dirt.

[0111] By using the worm gear 83 and the gearing 71 of the drive ring 59, a self-locking mechanism can be achieved, preventing the water diverter disc 57 from rotating accidentally. The high transmission ratio ensures that the water diverter disc 57 can always be rotated reliably, even with high friction between the drive ring 59 and the upper housing section 37.

[0112] The previously explained arrangement has a number of advantages. Advantageously, a pressurized sealing point between the pump 21 and the water separator 23 is eliminated. This results in a reduced overall height and thus a smaller installation space requirement. A reduction in water consumption and the so-called round-flow volume is possible. The pump device 19 enables a circulation pump system with higher efficiency. This results in more possible positions and / or a combination of open and closed fluid outlets 51, 52, 53, 54. The fluid outlets 51, 52, 53, 54 flow evenly. Furthermore, the possibility of spatially separating the fluid outlets 51, 52, 53, 54 arises.

[0113] The water diverter disc 57 is accordingly constructed in two parts within the pump device 19. The function of the annular disc 58 as a perforated disc is decoupled from the drive ring 59, which serves as the drive for the annular disc 58. This arrangement enables the drive ring 59 to be driven tangentially via the toothing 71, thus optimally designing a bearing clearance between the drive ring 59 and the driving screw 83. Furthermore, the annular disc 58 can be mounted in a floating manner on the drive ring 59, so that when water pressure is applied, it can float up from the drive ring 59 in the axial direction AX, thus better sealing closed fluid outlets 51, 52, 53, 54.

[0114] The floating of the annular disc 58 can be in the range of 0.2 mm to 2 mm in order to generate the lowest possible flow losses in the area of ​​a support between the annular disc 58 and the drive ring 59. The drivers 73, 74, 75 on the drive ring 59 are positioned so that the annular disc 58 can only be mounted in a defined position (Poka Yoke). Plastic, for example, polyoxymethylene (POM), is preferably used as the material for the drive ring 59 and the annular disc 58. The inner diameter of the drive ring 59 and the annular disc 58 can be in the range of 50 mm to 120 mm. The outer diameter can vary between 90 mm and 200 mm. The thickness of the annular disc 58 is, for example, 1.4 mm to ensure a certain degree of flexibility. The thickness is preferably in a range between 0.8 mm and 3 mm.

[0115] This advantageously allows for a floating mounting of the annular disc 58. This results in as many output combinations as possible with the openings 61, 62, 63 in the annular disc 58 on the same pitch circle. The floating mounting allows for good sealing of unopened fluid outlets 51, 52, 53, 54. The two-part design of the water diverter disc 57 simplifies the floating of the annular disc 58. This reduces the risk of tilting and / or jamming of the annular disc 58.

[0116] The floating bearing of the annular disc 58 decouples it from any bearing play of the water diverter drive 76. The complexity of different water diverter discs 57 is shifted into a structurally simple part, namely the annular disc 58. This results in a precise bearing of the water diverter drive 76, allowing for a more precise center distance tolerance in the gear stage, since the drive ring 59 does not float, or floats less, and maintains its position relative to the driving element in the form of the worm 83.

[0117] This results in a defined engagement of the screw 83 in the drive ring 59. The water diverter 23 is easy to repair because, if the drive ring 59 becomes worn, it can be replaced independently of the annular disc 58. Reduced friction between the drive ring 59 and the housing 35 is achieved when the pumping device 19 is switched off. This leads to a reduction in wear. This results in a uniform flow to the annular disc 58 from below and thus a lower risk of the annular disc 58 tilting. Instead of multiple closure elements, only a single closure element in the form of the annular disc 58 is required within the pumping device 19.

[0118] Fig. 10 shows a sectional view of an embodiment of a fluid outlet 51 as mentioned above. All subsequent explanations regarding the fluid outlet 51 apply correspondingly to the fluid outlets 52, 53, 54. In the orientation of Fig. 10, the fluid outlet 51 extends from the top of the end plate 55. The fluid outlet 51 has the geometry of an asymmetric funnel.

[0119] The fluid outlet 51 comprises a tubular connecting section 91. The connecting section 91 can have a circular, oval, or elliptical cross-section. An oval cross-section has the advantage that installation space can be saved along the radial direction R, while a larger flow cross-section can be achieved with the same installation space along the radial direction R compared to a circular cross-section. One of the supply lines 30, 31, 32 is connected to the connecting section 91. Now returning to Fig. 3, a diffuser chamber encircling the central axis 20 is formed between the lower housing part 36, the tubular heating element 40, the upper housing part 37, and the second receiving section 48 of the inner housing part 38.

[0120] 92 is formed. The diffuser chamber 92 extends from the pump inlet 39 toward the water diverter disc 57. The diffuser chamber 92 is constructed rotationally symmetrically to the central axis 20. In front of the water diverter disc 57, the diffuser chamber 92 widens and distributes the rinsing liquor and / or the fresh water F to the water diverter disc 57. The water diverter 23 or the water diverter disc 57 is integrated into the diffuser chamber 92. The fluid outlets 51, 52, 53, 54 discharge from the diffuser chamber 92.

[0121] In the annular diffuser chamber 92, during operation of the pump device 19, the rinsing liquor and / or the fresh water F flows in a flow direction S (Fig. 4) circularly around the central axis 20 and through those fluid outlets 51, 52, 53, 54 which are released by means of the water switch 23, along the axial direction AX upwards to the corresponding supply lines 30, 31, 32 in order to supply the spray devices 24, 25, 26 with rinsing liquor and / or fresh water F.

[0122] As shown in Fig. 10, the connecting section 91 is followed by a transition section

[0123] 93, by means of which the tubular connecting section 91 is connected to the end plate 55. The transition section 93 has an asymmetrical funnel geometry as mentioned above. This geometry can also be referred to as shoe-shaped.

[0124] The transition section 93 has a fillet or radius 94. The radius

[0125] Opposite 94, a bevel 95 is provided, which, with the aid of a radius 96, merges into the end plate 55 and, with the aid of a radius 97, into the connecting section 91. The transition section 93 runs completely around the connecting section 91, with the radius 94, the bevel 95, and the radii 96, 97 merging into one another.

[0126] The geometry of the fluid outlet 51 is adapted in the preferred flow direction S within the pump device 19 by the radii 94, 96, 97 and the slope 95 and by the resulting asymmetrical geometry towards the connection section 91, so that an optimal inflow of the rinsing liquor and / or the fresh water F into the fluid outlet 51 is possible.

[0127] This asymmetrical geometry, which can also be referred to as a shoe geometry, simulates a small spiral casing for the fluid outlet 51. Furthermore, the radii 94, 96 of the fluid outlet 51 are continued by means of radii 98, 99 at the openings 61, 62, 63 of the annular disc 58 of the water diverter 23. Furthermore, the radius 94 is also applied to a side of the fluid outlet 51 facing away from the flow, so that rinsing liquor and / or fresh water F can also flow into the fluid outlet 51 opposite to the flow direction S. The preferably elliptical cross-sectional geometry of the fluid outlet 51 or the connecting section 91 also enables an increase in the flow cross-section without increasing the diameter of the water diverter disc 57 and / or the diameter of the pumping device 19.

[0128] An advantage of this arrangement shown in Fig. 10 is the optimal deflection of the rinsing liquor and / or fresh water F at the fluid outlet 51 in order to achieve the greatest possible hydraulic efficiency of the pumping device 19. This results in optimal utilization of the flow cross-section of the fluid outlet 51, since no, or at least less, turbulence occurs when the rinsing liquor and / or fresh water F flows into the fluid outlet 51, and thus its entire flow cross-section can be utilized. The preferably elliptical cross-section of the fluid outlet 51 or the connecting section 91 enables an increase in the flow cross-section without increasing the diameter of the water diverter disc 57 of the water diverter 23 and thus leads to a more compact pumping device 19.

[0129] Fig. 11 shows a schematic plan view of an embodiment of a sealing device 100. Fig. 12 shows a schematic sectional view of the sealing device 100. The sealing device 100 is designed to seal the tubular heating element 40 in a fluid-tight manner with respect to the housing lower part 36.

[0130] The sealing device 100 is constructed rotationally symmetrically to the central axis 20. The sealing device 100 is a sealing ring. The sealing device 100 comprises a V-shaped receiving section 101, which is received in a suitably shaped annular groove in the housing lower part 36. The receiving section 101 has an annular groove 102 that completely surrounds the central axis 20 and in which the tubular heating element 40 is received. The annular groove 102 is provided between a first leg 103 and a second leg 104 of the receiving section 101.

[0131] Extending from the top of the second leg 104 is a deflection section 105, which is configured to deflect the rinsing solution and / or the fresh water F in the axial direction AX, as indicated by an arrow 106. The deflection section 105 has an annular contact surface 107 on the underside, with which the deflection section 105 bears against the inside of the housing lower part 36.

[0132] Facing away from the contact surface 107, the deflection section 105 has a radius 108. The rinsing solution and / or the fresh water F is deflected by means of the radius 108, as indicated by the arrow 106. The radius 108 forms a fluid-facing side of the sealing device 100. A cylindrical outer surface 109 is provided on the deflection section 105, which is rotationally symmetrical to the central axis 20. With the outer surface 109, the deflection section 105 rests on the inside of the tubular heating element 40.

[0133] The sealing device 100 seals and fixes the tubular heating element 40 and simultaneously directs the rinsing liquor and / or fresh water F emerging from the impeller 41 upwards toward the tubular heating element 40 with the aid of the radius 108 or a chamfer. No residues of rinsing liquor and / or fresh water F form within the pumping device 19. This can optimize the hydraulic efficiency of the pumping device 19, prevent residues of the rinsing liquor and / or fresh water F within the pumping device 19, and reduce the circulation volume, in particular reduce a dead volume, of the pumping device 19.

[0134] The sealing device 100 fixes the tubular heating element 40 within the pumping device 19 and simultaneously seals it. Furthermore, the sealing device 100 with the radius 108 comprises a hydraulically optimized geometry to optimize the hydraulic efficiency of the pumping device 19 and minimize residues of rinsing solution and / or fresh water F within the pumping device 19 after pumping.

[0135] The V-shaped receiving section 101 fixes and seals the tubular heating element 40 and simultaneously smoothly directs the rinsing solution and / or fresh water F emerging from the impeller 41 upwards to the tubular heating element 40 with the aid of the aforementioned chamfer or radius 108 on the fluid-facing side of the sealing device 100. Furthermore, this fills the aforementioned annular groove of the housing lower part 36, and no residues of the rinsing solution and / or fresh water F form within the pump device 19.

[0136] The advantages of this previously explained arrangement are an optimization of the hydraulic efficiency of the pumping device 19, the avoidance of a residual amount of rinsing liquor and / or fresh water F within the pumping device 19, which leads to a more hygienic design, and a reduction of the circulating amount of rinsing liquor and / or fresh water F and thus a reduction in dead volume.

[0137] Now returning again to Fig. 3, during operation of the pump device 19, the impeller 41 sucks in rinsing liquor and / or fresh water F via the intake port 22 connected to the pump inlet 39. The rinsing liquor and / or the fresh water F are conveyed upwards via the diffuser chamber 92 in the direction of the water diverter 23, in particular in the direction of the water diverter disc 57. The rinsing liquor and / or the fresh water F flows through the pump inlet 39 into the diffuser chamber 92, flows outwards within the diffuser chamber 92 along the radial direction R to the radius 108 of the sealing device 100 and is deflected by this in the orientation of Fig. 3 upwards and along the axial direction AX, i.e. against the direction of gravity g, towards the water diverter disc 57.

[0138] Within the diffuser chamber 92, the rinsing liquor and / or fresh water F flows along the flow direction S around the central axis 20. In this case, the flow direction S is counterclockwise. However, the flow direction S can also be clockwise. The annular disc 58 of the water diverter disc 57 floats on the rinsing liquor and / or fresh water F, with the annular disc 58 being lifted from the end face 72 of the drive ring 59 and pressed against the inner side of the cover plate 55.

[0139] As a result, the annular disc 58 is sealed off from the end plate 55, so that the rinsing solution and / or the fresh water F can only flow out of the pump device 19 through those fluid outlets 51, 52, 53, 54 that are exposed by the annular disc 58. Even when the annular disc 58 is lifted off the drive ring 59, the positive connection between the annular disc 58 and the drive ring 59 remains intact, so that the water diverter drive 76 can still rotate the water diverter disc 57.

[0140] During operation of the pump device 19, the control and regulation device 34 can actuate the water diverter drive 76 to rotate the water diverter disc 57 and thus selectively open and / or close individual or all fluid outlets 51, 52, 53, 54. This allows the spray devices 24, 25, 26 to be switched on or off separately. It is thus possible, for example, to specifically supply only the two spray devices 24, 25 with rinsing solution and / or fresh water F, and not the spray device 26.

[0141] The spray devices 24, 25, 26 can therefore be activated or deactivated as desired. The activation or deactivation of the spray devices 24, 25, 26 preferably occurs during a rinsing cycle, which is carried out using a rinsing program. The rinsing program can be stored in the control and regulation device 34. Any number of different rinsing programs can be stored in the control and regulation device 34.

[0142] The pump inlet 39 forms in particular a lowest point of the pumping device 19. This leads to the rinsing liquor and / or the fresh water F draining completely out of the pumping device 19 due to gravity, as indicated in Fig. 3 by means of an arrow 110.

[0143] The previously explained design of the pumping device 19 results in the carryover of rinse liquor from one rinse bath to the next being kept as low as possible during a wash cycle of the household dishwasher 1. This goal is achieved by keeping the residual amount of rinse liquor and / or fresh water F, especially in the pump sump 16, as low as possible after pumping out. A significant effect of reducing the residual amount of rinse liquor and / or fresh water F is an improvement in the so-called stain value after drying. This results from the fact that fewer detergent and dirt residues can dry onto the dishes and thus become visible when less lye is carried over into the final rinse bath.

[0144] To ensure complete idling of the pumping device 19, the drive motor 42 is aligned vertically with the impeller 41. This means that the central axis 20 runs parallel to the direction of gravity g. Likewise, the fluid outlets 51, 52, 53, 54 are arranged vertically. To ensure the lowest possible installation height, the water diverter 23 is integrated into the pumping device 19. The diffuser chamber 92 of the pumping device 19 is preferably an annular gap that surrounds the drive motor 42 on one side and is delimited by the tubular heating element 40 on the other side.

[0145] An exemplary distance between the drive motor 42 and the tubular heating element 40, or a gap width of the diffuser chamber 92, is between 3 mm and 12 mm. This arrangement also allows the waste heat of the drive motor 42 to be dissipated by the rinsing solution and / or the fresh water F. Furthermore, this arrangement ensures optimal venting of the pumping device 19, since no air chambers are present in an upper region of the pumping device 19, particularly in the area of ​​the water diverter 23.

[0146] This means that when the pump sump 16 is filled with rinsing liquor and / or fresh water F, the pumping device 19 runs in parallel with rinsing liquor and / or fresh water F as if two communicating pipes were used, and no air chambers are formed, which is advantageous for trouble-free operation of the pumping device 19. The fluid outlets 51, 52, 53, 54 of the water diverter 23 to the spray devices 24, 25, 26 are located on a circular ring and can be optimally arranged there. At least some of the fluid outlets 51, 52, 53, 54 can have an oval rather than a circular flow cross-section. During a pumping process using the pumping device 19, the entire rinsing liquor and / or fresh water F flows back into the pump sump 16. One effect of this is an improvement in the rinsing result. In particular, this leads to fewer stains on the dishes to be washed G. Complete venting is possible without any additional measures.The drive motor 42 can be cooled or cooled via the contact of the stator 50 with the diffuser chamber 92. Only the second receiving section 48, which defines the diffuser chamber 92, is arranged between the stator 50 and the diffuser chamber 92. This results in a very compact design for the pump device 19 and thus corresponding space advantages.

[0147] In summary, viewed from bottom to top along the central axis 20, the functional sections of the liquid conveying channel 121 of the pumping device 19 are provided at successive heights as a pump inlet 39, a pump chamber or impeller chamber 119 with an impeller or impeller 41 that can be driven to rotate therein for conveying the rinsing liquid F, a pressure and / or diffuser chamber 92 arranged downstream of the pump chamber 119, a water diverter element 57 that can be rotated about the central axis 20 in the upper end section of the pressure and / or diffuser chamber 92, and the plurality of fluid outlets such as 51, 52, 53, 54 of the pumping device 19. The term liquid conveying channel is understood to mean the cavity provided in the housing 35 of the pumping device 19, which is filled and flowed through by the rinsing liquid F during conveying operation of the pumping device 19.As a result of this vertical sequence of the various functional sections of the liquid conveying channel 121 of the pumping device, the flushing liquid F is guided from the pump inlet 39 to the outlet opening such as A51, A52, A53, A54 of the respective fluid outlet such as 51, 52, 53, 54, as viewed in the housing 35 from bottom to top, rising upwards against the direction of gravity g. Deflections and / or reflections of the conveyed flushing liquid F with a directional component in the direction of gravity g, i.e. in the opposite direction to its bottom-up conveying direction, are largely avoided. A retrograde flow of the flushing liquid F conveyed by the impeller 41 from bottom to top on its way through the liquid conveying channel 121 is therefore largely avoided.In addition, the sequential arrangement of the various functional sections of the liquid conveying channel 121 is favorable for a simple structure and the associated simple manufacture of the pumping device 19. Conversely, the pumping device 19 can be easily disassembled, for example in the event of repair, and every essential component of the pumping device can be made accessible. Furthermore, this sequence of the various functional sections of the liquid conveying channel 121 ensures that the rinsing liquid F can flow completely downwards via the pump inlet 39 solely through the action of gravity when the drive motor 42 for the impeller 41 is switched off and the impeller 41 is stationary. In order to ensure that the liquid conveying channel 121 runs as completely empty as possible, it is particularly favorable if the pump inlet 39 is expediently provided at the lowest point of the pumping device 19.This prevents residual water from remaining in the liquid conveying channel 121 of the housing 35 of the pumping device 19 when the drive motor 42 of its impeller 41 is out of operation. As a result, there is little or no risk of dirty water and / or lye carryover when changing the rinse bath from one partial rinse cycle, such as the cleaning cycle, to the subsequent partial rinse cycle, such as the intermediate rinse cycle or final rinse cycle of the rinse cycle of a dishwashing program.This is because when the rinsing bath is changed, the rinsing liquid used for the respective partial rinse cycle can now at least almost completely flow out of the pump device 19 and be removed from the hydraulic circuit, in particular by pumping out the pump sump 16 using a drain pump (not shown in Figures 2 and 3), and new rinsing liquid, in particular fresh water, can be fed to the hydraulic circuit 33 for the next partial rinse cycle without this being able to mix with dead or residual water from the previous partial rinse cycle. As a result, there are fewer or no stains from dirt particles, limescale particles, etc. on the rinsed and subsequently dried items G, i.e. the rinsing result is improved. In particular, the intermediate rinse cycle previously provided between the cleaning cycle and the final rinse cycle can now be carried out if necessary.be carried out with a smaller amount of fresh water or even be eliminated entirely, since rinsing out residual or dead water containing dirt particles and / or cleaning agent from the pumping device 19 is no longer absolutely necessary.

[0148] Fig. 13 shows a schematic plan view of an embodiment of a blank 111 for producing the stator 50 of the drive motor 42 and the stator 80 of the water switch drive 76. Fig. 14 shows an arrangement 112 comprising a first stator sheet 113, which is assigned to the stator 50, and a second stator sheet 114, which is assigned to the stator 80.

[0149] The assembly 112 is manufactured from the blank 111. The blank 111 can be circular. However, the blank 111 can fundamentally have any desired geometry. The assembly 112 can be manufactured from the blank 111 using a stamping process. During the manufacture of the assembly 112, the first stator lamination 113 and the second stator lamination 114 are manufactured simultaneously. The stator 50 is manufactured from a stack of first stator laminations 113. Accordingly, the stator 80 is manufactured from a stack of second stator laminations 114.

[0150] The first stator lamination 113 has a circumferential annular portion 115, from which a plurality of base portions 116 extend inward. At the base portions 116, the first stator lamination 113 has an inner diameter di. The second stator lamination 114 also has a circumferential annular portion 117, from which a plurality of base portions 118 extend inward. The annular portion 117 has an outer diameter da that is smaller than the inner diameter di, so that the second stator lamination 114 can be arranged within the first stator lamination 113.

[0151] It is thus possible to manufacture both the stator 50 of the drive motor 42 and the stator 80 of the water switch drive 76 from one and the same blank 111. The stator 80 of the water switch drive 76 is thus dimensioned such that it is smaller than or equal to a stator cutout in the center of the stator 50 of the drive motor 42, which then forms the stator 80 for the water switch drive 76. Thus, the stator 50 of the drive motor 42 and the stator 80 of the water switch drive 76 can be manufactured in a single process step.

[0152] Since the pump device 19 and the water diverter drive 76 are always required in pairs to manufacture the household dishwasher 1, this leads to simplified manufacturing and also to cost reductions. This could be applied analogously to the combination of stator 50 of the drive motor 42 and a stator of a drain pump. It is thus possible to use punching waste that arises during the manufacture of the stator 50 of the drive motor 42 to manufacture a stator of another motor, in this case the water diverter drive 76, which leads to material savings. Two stator punch packages can be produced simultaneously in one process step, which leads to manufacturing cost savings. Only one punch package tool is required, which also allows investment costs to be reduced. This advantageously results in resource conservation with regard to material consumption.

[0153] Figure 15 shows a schematic sectional view of an embodiment of the pumping device 19 modified from the embodiment of Figure 3. In contrast to Figure 3, here in Figure 15 the housing 35 of the pumping device 19 has a one-piece outer housing part 367 which delimits the liquid conveying channel 121, which is at least almost rotationally symmetrical to the central axis 20, to the outside, in particular up to the fluid outlets such as 51 - 54. Instead of the tubular heating element 40, at least one tubular heating element RH is now accommodated in the liquid conveying channel 121. This allows the structure or design of the pumping device according to the invention to be further simplified. It may already be sufficient if the housing 35 of the pumping device 19 is composed of only two parts - the outer housing part 367 and the inner housing part 38. If necessary, a cover part DE can also be provided, with which the upper opening of the inner housing part 38 can be closed.Such a cover part DE is only indicated by dash-dotted lines in Figure 15 for the sake of simplicity of the drawing. This allows the stator 50 accommodated in the housing inner part 38 between its first receiving section 45 and second receiving section 48 to be reliably protected against moisture and / or rinsing fluid. The housing outer part 367 and the housing inner part 38 inserted into or immersed in it can be mechanically connected to one another, for example, by a snap-in, locking, and / or bayonet connection and / or other coupling. Furthermore, the fact that at least one tubular heating element RH is accommodated in the fluid conveying channel 121 formed between the housing inner part 38 and the housing outer part 367 results in improved heat transfer between the tubular heating element RH and the rinsing fluid F conveyed from bottom to top through the fluid conveying channel 121 by means of the impeller or pump wheel 41 of the pumping device 19.In particular, the second receiving section 48 forms at least a partial section of the inner boundary wall of the liquid conveying channel 121.

[0154] The tubular heating element RH is expediently provided in the liquid conveying channel 121 along its flow path after the impeller 41 of the pumping device 19, in particular arranged at least almost rotationally symmetrically to the central axis 20, preferably at least almost concentrically to the second receiving section 48. It is expediently arranged with respect to the central axis orThe central axis of the preferably circular-cylindrical liquid conveying channel 121 is arranged symmetrically in such a way that, viewed in the respective passage cross-sectional plane of the liquid conveying channel 121, there is at least approximately the same gap width for the rinsing liquid F flowing through the tubular heating element RH and the inner boundary wall of the liquid conveying channel 121 formed by the housing inner part 38, as well as between the tubular heating element RH and the outer boundary wall of the liquid conveying channel 121 formed by the housing outer part 367. The tubular heating element RH can thus be largely evenly flowed through by the conveyed rinsing liquid F, which is favorable for the transfer of heat from the tubular heating element to the rinsing liquid flowing past it.

[0155] In particular, it may be sufficient and / or advantageous if the tubular heater RH is accommodated in the liquid conveying channel 121 with only approximately one turn or a partial turn section and runs around the central axis 20, preferably around the second receiving section 48 of the housing inner part 38. In this way, impairments of the flow conditions by the tubular heater RH in the liquid conveying channel 121 can be minimized or largely avoided. In this regard and / or also from a structural point of view, it may be particularly advantageous if the turn or the partial turn section of the tubular heater RH is arranged at least approximately horizontally or in a plane orthogonal to the central axis 20. However, it is also possible for the tubular heater RH to run around the central axis 20 with more than one turn in the liquid conveying channel 121, e.g. if a higher heat transfer to the rinsing liquid is required.Although the present invention has been described using exemplary embodiments, it can be modified in many ways.

[0156] Reference symbols used:

[0157] 1 household dishwasher

[0158] 2 rinsing containers

[0159] 3 Door

[0160] 4 Washing-up area

[0161] 5 swivel axis

[0162] 6 Loading opening

[0163] 7 Floor

[0164] 8 Ceiling

[0165] 9 Rear wall

[0166] 10 Side wall

[0167] 11 Side wall

[0168] 12 Dishwasher waste holder

[0169] 13 Dishwasher drawer

[0170] 14 Dishwasher drawer

[0171] 15 base supports

[0172] 16 Pump sump

[0173] 17 Procedure

[0174] 18 Sieve system

[0175] 19 Pumping device

[0176] 20 Central axis

[0177] 21 Pump

[0178] 22 intake manifold

[0179] 23 Water switch

[0180] 24 spray device

[0181] 25 Spray device

[0182] 26 Spray device

[0183] 27 axis of rotation

[0184] 28 axis of rotation

[0185] 29 axis of rotation

[0186] 30 supply line

[0187] 31 supply line

[0188] 32 Supply line 33 Hydraulic circuit

[0189] 34 Control and regulation device

[0190] 35 housings

[0191] 36 Housing base

[0192] 37 Upper housing part

[0193] 38 Housing interior

[0194] 39 Pump inlet

[0195] 40 tubular heating element

[0196] 41 Impeller

[0197] 42 drive motor

[0198] 43 Drive shaft

[0199] 44 Rotor

[0200] 45 Recording section

[0201] 46 Recording Room

[0202] 47 Closure

[0203] 48 Recording section

[0204] 49 Recording Room

[0205] 50 Stator

[0206] 51 Fluid outlet

[0207] 52 Fluid outlet

[0208] 53 Fluid outlet

[0209] 54 Fluid outlet

[0210] 55 end plate

[0211] 56 connecting section

[0212] 57 Water switch disc

[0213] 58 circular disc

[0214] 59 Drive ring

[0215] 60 Breakthrough

[0216] 61 Breakthrough

[0217] 62 Breakthrough

[0218] 63 Breakthrough

[0219] 64 guide section

[0220] 65 guide section

[0221] 66 Guide section 67 Recess

[0222] 68 recess

[0223] 69 recess

[0224] 70 base section

[0225] 71 Gearing

[0226] 72 front side

[0227] 73 drivers

[0228] 74 drivers

[0229] 75 carriers

[0230] 76 Water switch drive

[0231] 77 Housing part

[0232] 78 Housing part

[0233] 79 Interior

[0234] 80 Stator

[0235] 81 Rotor

[0236] 82 drive shaft

[0237] 83 Snail

[0238] 84 ring groove

[0239] 85 guide bar

[0240] 86 guide bar

[0241] 87 Guide bridge

[0242] 88 Guide bridge

[0243] 89 Drainage opening

[0244] 90 Fluid space

[0245] 91 connecting section

[0246] 92 Diffuser room

[0247] 93 Transition section

[0248] 94 radius

[0249] 95 slope

[0250] 96 radius

[0251] 97 radius

[0252] 98 radius

[0253] 99 radius

[0254] 100 Sealing device 101 Receiving section

[0255] 102 ring groove

[0256] 103 legs

[0257] 104 legs

[0258] 105 diversion section

[0259] 106 Arrow

[0260] 107 contact surface

[0261] 108 radius

[0262] 109 exterior area

[0263] 110 Arrow

[0264] 111 blank

[0265] 112 Arrangement

[0266] 113 Stator sheet

[0267] 114 Stator sheet

[0268] 115 ring section

[0269] 116 Foot section

[0270] 117 ring section

[0271] 118 Foot section

[0272] 367 one-piece housing outer part

[0273] A Extension direction

[0274] AX axial direction da outer diameter

[0275] DE Cover part di inner diameter

[0276] E Insertion direction

[0277] F Rinse solution and / or fresh water g Direction of gravity

[0278] G Dishes

[0279] R Radial direction

[0280] RH tubular radiators

[0281] S Flow direction

Claims

PATENT CLAIMS 1. Household dishwasher (1) with a washing container (2) for receiving wash ware (G), a hydraulic circuit (33) for circulating washing liquor and / or fresh water (F) in the washing container (2), and a pumping device (19) for supplying the hydraulic circuit (33) with the washing liquor and / or the fresh water (F), wherein the pumping device (19) has a water diverter (23) integrated into a housing (35) of the pumping device (19) for selectively distributing the washing liquor and / or the fresh water (F) to a plurality of fluid outlets (51, 52, 53, 54) of the pumping device (19), wherein the water diverter (23) has a water diverter disc (57), wherein the water diverter disc (57) has an annular disc (58) and a drive ring (59) for driving the annular disc (58), and wherein the annular disc (58) and the Drive ring (59) are two separate components.

2. Household dishwasher according to claim 1, characterized in that the pumping device (19) has a central axis (20) which is oriented along a direction of gravity (g).

3. Household dishwasher according to claim 2, characterized in that the circular disc (58) and the drive ring (59) are positively connected to one another.

4. Household dishwasher according to claim 3, characterized in that the annular disc (58) has recesses (67, 68, 69), wherein the drive ring (59) has drivers (73, 74, 75) corresponding to the recesses (67, 68, 69), and wherein the drivers (73, 74, 75) engage positively in the recesses (67, 68, 69).

5. Household dishwasher according to claim 4, characterized in that the recesses (67, 68, 69) and the drivers (73, 74, 75) are arranged unevenly distributed around the central axis (20), or wherein at least one of the recesses (67, 68, 69) and at least one of the drivers (73, 74, 75) has a width that differs from the other recesses (67, 68, 69) and the other drivers (73, 74, 75).

6. Household dishwasher according to one of claims 3 - 5, characterized in that the annular disc (58) is designed to float on the washing liquor and / or the fresh water (F) during operation of the pump device (19), wherein the positive connection between the annular disc (58) and the drive ring (59) is designed such that the positive connection between the annular disc (58) and the drive ring (59) is still maintained when the annular disc (58) floats.

7. Household dishwasher according to one of claims 2 - 6, characterized in that the annular disc (58) has openings (61, 62, 63) for selectively releasing individual, several or all fluid outlets (51, 52, 53).

8. Household dishwasher according to one of claims 2 - 7, characterized in that the drive ring (59) has on the outside a toothing (71) which runs at least in sections around the central axis (20).

9. Household dishwasher according to claim 8, characterized in that the water diverter (23) has a water diverter drive (76) for driving the drive ring (59), wherein a drive shaft (82) of the water diverter drive (76) is oriented perpendicular to the central axis (20).

10. Household dishwasher according to claim 9, characterized in that the water diverter drive (76) has a worm (83) attached to the drive shaft (82) which engages in the toothing (71).

11. Household dishwasher according to one of claims 1 - 10, characterized in that the water diverter disc (57) has a central opening (60) through which a part of the housing (35) is passed.

12. Household dishwasher according to claim 11, characterized in that the water diverter disc (58) is mounted on the inside of the opening (60) by means of guide sections (64, 65, 66) formed on the housing (35).

13. Household dishwasher according to one of claims 2 - 12, characterized in that the drive ring (58) is received in an annular groove (84) provided in the housing (35).

14. Household dishwasher according to claim 13, characterized in that the housing (35) has a drainage opening (89) pointing in the direction of the central axis (20) which is in fluid communication with the annular groove (84).

15. Household dishwasher according to claim 13 or 14, characterized in that the drive ring (58) is rotatably mounted on guide webs (85, 86, 87, 88) projecting radially into the annular groove (84).

16. Pumping device (19) for a water-conducting household appliance, in particular for a household dishwasher according to at least one of the preceding claims, wherein the pumping device (19) has a water diverter (23) integrated into a housing (35) of the pumping device (19) for selectively distributing water (F) to a plurality of fluid outlets (51, 52, 53, 54) of the pumping device (19), wherein the water diverter (23) has a water diverter disc (57), wherein the water diverter disc (57) has a Circular disc (58) and a drive ring (59) for driving the circular disc (58), and wherein the circular disc (58) and the drive ring (59) are two separate components.

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