Domestic dishwasher having pump device and pump device for water-conducting domestic appliance

Abstract

The invention relates to a domestic dishwasher (1) having a washing container (2) for receiving items (G) to be washed, a hydraulic circuit (33) for circulating washing liquid and / or fresh water (F) in the washing container (2), and a pump device (19) for applying washing liquid and / or fresh water (F) to the hydraulic circuit (33), the pump device (19) having a water guide (23) integrated in a housing (35) of the pump device (19), the water deflector (23) is used for selectively distributing washing liquid and / or fresh water (F) to a plurality of fluid outlets (51, 52, 53, 54) of the pump device (19), the water deflector (23) is provided with a water deflector disc (57), the water deflector disc (57) comprises an annular disc (58) and a driving ring (59) used for driving the annular disc (58), and the annular disc (58) and the driving ring (59) are two components which are separated from each other.

Description

TECHNICAL FIELD

[0001] The present invention relates to a domestic dishwasher. BACKGROUND

[0002] Domestic dishwashers have a washing container for accommodating washing items. In order to enable the washing items to be rinsed with washing liquid and / or fresh water, spray zones can be provided in the washing container. The spray zones can be configured, for example, as spray arms which are mounted rotatably in or on the washing container. In order to enable the spray zones to be rinsed with washing liquid and / or fresh water, the dishwasher is equipped with a circulation pump. The washing liquid and / or fresh water is distributed to the spray zones by so-called water distributors. The circulation pump takes up the washing liquid and / or fresh water from the pump sump of the dishwasher, the motor shaft is usually arranged horizontally to the impeller of the circulation pump, and the washing liquid and / or fresh water is delivered by the pump housing, in which a heating device can also be integrated, to the water distributors or directly to the spray zones. SUMMARY

[0003] In view of the above, it is an object of the present invention to provide an improved domestic dishwasher.

[0004] It is therefore proposed that a domestic dishwasher comprises a washing container for accommodating washing items, a hydraulic circuit for circulating washing liquid and / or fresh water in the washing container, and a pump device for applying washing liquid and / or fresh water to the hydraulic circuit. Here, the pump device has a water distributor which is integrated in a housing of the pump device, the water distributor being configured to selectively distribute washing liquid and / or fresh water to a plurality of fluid outlets of the pump device, wherein the water distributor comprises a water distributor disc, the water distributor disc comprising a ring disc and a drive ring for driving the ring disc, and wherein the ring disc and the drive ring are two separate components from each other.

[0005] Since the ring disc and the drive ring are two separate components from each other, the water distributor disc can be manufactured more easily. This reduces the manufacturing costs of the water distributor disc. Furthermore, the ring disc can be mounted in a floating manner on the drive ring, so that the ring disc can float on the washing liquid and / or fresh water during operation of the pump device, for example in order to achieve a fluid-tight sealing of the selected fluid outlet. By floating mounting of the ring disc, it can be decoupled from the bearing play of the water distributor drive. The complexity of the water distributor disc is reduced. Furthermore, the water distributor disc is also easier to repair, for example the ring disc or the drive ring can be replaced individually.

[0006] The washing container is preferably of cuboid construction. The washing container can be closed by a door which is rotatably hinged to the washing container. The washing container can be provided with a plurality of washing object receptacles, for example lower baskets, upper baskets and cutlery drawers. Washing objects can be placed in the washing object receptacles and are subjected to washing liquid and / or fresh water by means of a hydraulic circuit. "Subjecting" in the present case can include spraying or wetting of the washing objects. "Washing liquid" in the present case means water which contains cleaning agents and / or dirt particles which are detached from the washing objects.

[0007] The hydraulic circuit can comprise a plurality of spray devices, for example in the form of spray arms which are arranged inside the washing container and / or intensification spray zones. The spray devices can be rotatably mounted in the washing container. The spray devices are connected to the fluid outlet of a pump device by means of supply lines. The pump device can be part of the hydraulic circuit. However, this is not mandatory.

[0008] In the present case, the pump device subjecting the hydraulic circuit to washing liquid and / or fresh water means in particular that the pump device pumps the washing liquid and / or fresh water through the hydraulic circuit. The pump device is in particular a circulation pump, preferably a heating pump. The pump device can therefore also be referred to as a circulation pump or a heating pump. It is particularly preferred that the pump device is a compact heating pump and can therefore also be referred to as such.

[0009] The pump device is designed for circulating washing liquid and / or fresh water in the washing container or in the hydraulic circuit. In addition, the pump device can also be designed for introducing heat into the washing liquid and / or fresh water. The pump device can be fixed to a pump pit of the domestic dishwasher. The pump device can be arranged completely or at least partially below the pump pit.

[0010] The pump device preferably has a central axis which can be oriented in the direction of gravity. The pump device is preferably substantially rotationally symmetrical with respect to the central axis. "Substantially" in this case means that parts of the pump device are rotationally symmetrical with respect to the central axis, but does not exclude that other parts of the pump device are not rotationally symmetrical with respect to the central axis. The central axis is in particular oriented parallel to the direction of gravity.

[0011] The central axis is "oriented" in the direction of gravity or parallel to the direction of gravity in the present case in particular means that the central axis can have an inclination or a deflection angle of up to ±20°, preferably up to ±10°, more preferably up to ±5°, further preferably up to ±3°, further preferably up to ±1°, with respect to the direction of gravity. However, the central axis can also extend completely in the direction of gravity, so that there is no inclination or deflection with respect to the direction of gravity. Depending on the installation situation, a suitable slight inclination or tilt can be chosen.

[0012] The housing of the pump device is preferably of a multi-part construction. For example, the housing can comprise a housing lower part, a housing upper part and a housing inner part. The housing lower part, the housing upper part and / or the housing inner part can be a plastic part, in particular a plastic injection-moulded part. This makes it possible to produce the pump device at low cost. The housing lower part, the housing upper part and / or the housing inner part can be connected together by means of a form-fit connection. A form-fit connection is achieved by interlocking or intermeshing of the two parts. To achieve the form-fit connection, snap hooks, spring hooks or the like can be provided.

[0013] In the present case, the water guide is "integrated" in the housing, in particular in that the water guide is at least partially arranged inside the housing. At the same time, the housing can also at least partially serve as a part of the water guide. For example, the aforementioned housing inner part and the housing upper part at least partially form a part of the water guide. The water guide is therefore not spatially separated from the pump device.

[0014] By means of the water guide, it is possible to dispense washing liquid and / or fresh water to different fluid outlets. In the process, selected fluid outlets can be blocked or opened. To this end, a water guide disc, in particular a circular ring disc, is provided which is mounted rotatably in the housing. As mentioned above, the fluid outlets are in fluid connection with the spray devices. By means of the water guide, it is possible to apply washing liquid and / or fresh water selectively to individual spray devices. In addition, it is also possible to apply washing liquid and / or fresh water to all spray devices at the same time.

[0015] The water guide disc consists in particular of two parts, comprising a circular ring disc and a drive ring. The circular ring disc and the drive ring are two components which are "separated" from one another, which means that the circular ring disc and the drive ring can be produced separately and connected to one another when the water guide disc is assembled. The connection between the circular ring disc and the drive ring is preferably designed in such a way that the circular ring disc and the drive ring can be connected and separated from one another any number of times. The term "separated from one another" therefore does not exclude that the circular ring disc and the drive ring can be connected detachably.

[0016] According to one embodiment, the pump device has a central axis which is oriented in the direction of gravity.

[0017] According to another embodiment, the circular ring disc and the drive ring are connected to one another in a form-fit manner.

[0018] This makes it possible for the circular ring disc and the drive ring to be connected any number of times and for the connection between the circular ring disc and the drive ring to be released any number of times.

[0019] According to another embodiment, the circular ring disc is provided with recesses and the drive ring is provided with drive elements which correspond to the recesses and which are inserted into the recesses in a form-fit manner.

[0020] The number of recesses and the number of driving elements can be arbitrary. It is particularly preferred that three recesses and three driving elements are provided, respectively. Preferably, the number of recesses is equal to the number of driving elements. The recesses are in particular provided on the outer circumference of the circular disk. The recesses can be rectangular. By means of the driving elements and the recesses, torque can be transmitted from the drive ring to the circular disk.

[0021] According to another embodiment, the recesses and the driving elements are arranged in a non-uniform distribution around the central axis. Alternatively, at least one recess and at least one driving element have a different width than the other recesses and the other driving elements.

[0022] In this way, an encoding is achieved when the circular disk is assembled with the drive ring, which prevents a false assembly of the distributor disk (anti- error device). Alternatively, the recesses and the driving elements can also be arranged in a uniform distribution around the central axis. In this case, the encoding can be achieved by at least one recess and at least one driving element having a different width than the other recesses and the other driving elements. For example, the width of at least one recess and at least one driving element is greater than the width of the remaining recesses and the remaining driving elements.

[0023] According to another embodiment, the circular disk is configured to be able to float on the washing liquid and / or fresh water during operation of the pump device, wherein the form-fit connection between the circular disk and the drive ring is designed such that the form-fit connection between the circular disk and the drive ring continues to be maintained when the circular disk is floating.

[0024] By the floating of the circular disk, it can be pressed from the inside against the closure plate of the housing inner part, so that the fluid outlet to be closed is reliably sealed. In particular when floating, the circular disk is lifted from the end face of the drive ring, so that a gap filled with washing liquid and / or fresh water is formed between the end face and the circular disk. This gap is mainly spanned by the driving elements, so that the driving elements are able to transmit torque thereto even when the circular disk is floating.

[0025] According to another embodiment, all fluid outlets are oriented along the central axis.

[0026] The fluid outlet is preferably of a tubular structure. The fluid outlet can be part of the distributor. The fluid outlet can have a circular or elliptical cross-section. In the present case, the "orientation" of the fluid outlet along the central axis means in particular that the fluid outlet extends from the housing along the central axis or along the axial direction of the pump device. The axial direction is here parallel to or coincides with the central axis. In contrast, the radial direction of the pump device is in particular arranged perpendicular to the central axis or to the axial direction. Preferably, the pump device has no fluid outlet which is oriented perpendicular to the central axis, i.e. in the radial direction. All or all fluid outlets of the pump device extend along the central axis or the axial direction.

[0027] According to another embodiment, the circular disk has a through-hole for selectively opening individual, multiple or all fluid outlets.

[0028] The through-holes can be circular. The through-holes can also have an oblong hole geometry. The number of through-holes can be arbitrary. In particular, the number of through-holes is equal to the number of fluid outlets.

[0029] According to another embodiment, the drive ring has a toothing on the outside which at least section-wise surrounds the central axis.

[0030] The drive ring or the water guide disc is thus not driven in the middle, but on the outside or circumferentially. The toothing can be a helical toothing. The toothing can in particular be a spherical toothing. The toothing can be arranged completely around the central axis. This is, however, not mandatory. It is also possible to provide only a partial toothing.

[0031] According to another embodiment, the water guide has a water guide drive for driving the drive ring, wherein a drive shaft of the water guide drive is arranged perpendicularly with respect to the central axis.

[0032] In the present case, "perpendicularly" means an angle of 90° ± 10°, preferably 90° ± 5°, more preferably 90° ± 3°, further preferably 90° ± 1°, most preferably exactly 90°. The water guide drive is an electric motor. The water guide drive is preferably a so-called wet rotor. The water guide drive preferably comprises a first housing part which is integrally formed with a housing upper part of the pump device housing. A second housing part is connected to the first housing part in a form-fit manner, in particular in a snap or click-fit manner, wherein the second housing part encloses the first housing part. The housing parts enclose an interior space which is filled with washing liquid and / or fresh water when the pump device is in operation. The water guide drive further comprises a stator which is arranged on the outside of the second housing part and a rotatable rotor which is arranged in the interior space. The rotor is fixedly connected to a drive shaft which is in turn rotatably supported on the two housing parts.

[0033] According to another embodiment, the water guide drive comprises a worm which is mounted on the drive shaft and which engages into the toothing.

[0034] The toothing and the worm preferably have a spherical toothing. The use of a worm drive for driving the water guide disc makes it possible for the worm to remove dirt from the drive ring toothing. This results in a higher operational reliability.

[0035] According to another embodiment, the water guide disc has a central through-hole through which a part of the housing is guided.

[0036] The through-hole is in particular provided in the circular ring disk. The water guide disk is preferably ring-shaped and the central through-hole is in particular circular. For example, a part of the housing inner part is guided through the central through-hole. Thus, the water guide disk can be rotatably supported on the housing, in particular on the housing inner part, by means of the through-hole. Preferably, the pump device comprises a drive motor with a rotor for driving an impeller of the pump device and a stator, the rotor being accommodated in a first accommodation of the housing and the stator being accommodated in a second accommodation of the housing, and the second accommodation being guided through the through-hole. Preferably, the first and second accommodations are parts of the housing inner part. The first accommodation is cup-shaped and closed in the direction towards the impeller by a closure. The first accommodation encloses an accommodation space in which the rotor is arranged. The rotor is fixedly connected to a drive shaft of the drive motor. The impeller is likewise fixedly connected to the drive shaft. The drive shaft is rotatably supported on the first accommodation and the closure. The second accommodation is preferably likewise cup-shaped. The first and second accommodations are arranged in opposite directions, such that the second accommodation is open in the direction away from the impeller. The second accommodation encloses an annular accommodation space in which the stator of the drive motor is arranged. The stator can be bonded, for example, to the first and / or second accommodation.

[0037] According to a further embodiment, the water guide disk is supported on the inside of the through-hole by guide sections formed on the housing.

[0038] In particular, the circular ring disk is supported on the inside of the through-hole by guide sections. The number of guide sections can be arbitrary. However, it is particularly preferred that three guide sections are provided, which can be arranged uniformly distributed around the central axis. The guide sections are in particular parts of the inner housing. The washing liquid and / or fresh water can flow radially inwards from the water guide disk to the central axis between the guide sections. However, it is also possible to provide a continuous annular guide section instead of guide sections spaced apart from one another.

[0039] According to a further embodiment, the drive ring is accommodated in an annular groove provided in the housing.

[0040] Preferably, the annular groove is integrally formed on the housing upper part. The annular groove is filled with washing liquid and / or fresh water. The drive ring is located in the annular groove. The annular groove extends completely around the central axis of the pump device.

[0041] According to a further embodiment, the housing has a drain opening towards the central axis, which is in fluid connection with the annular groove.

[0042] Only one drain opening can be provided. However, it is also possible to provide a plurality of drain openings. Through the drain opening, the washing liquid and / or fresh water can flow out of the annular groove. In the present case, the drain opening is in particular in "fluid connection" with the annular groove, which means that the washing liquid and / or fresh water can flow through the drain opening from the annular groove in the direction of the central axis.

[0043] According to another embodiment, the drive ring is rotatably mounted on guide plates which project into the annular groove in the radial direction.

[0044] In this way, lower friction can be achieved when the drive ring is rotated. The number of guide plates can be arbitrary. Preferably, at least three guide plates are provided. Of course, four or more guide plates can also be provided. The guide plates project into the annular groove as seen in the radial direction.

[0045] According to an advantageous development of the application, the housing of the pump device according to the application has a liquid conveying channel inside it. Along the central axis, in succession at different height positions, as functional sections of the liquid conveying channel of the pump device according to the application, there are provided in succession a pump inlet, a pump chamber or impeller chamber with an impeller which can be driven in rotation therein for applying the washing liquid, a pressure and / or diffusion chamber which follows the pump chamber, a water guide element which can be rotated about the central axis at the upper end of the pressure and / or diffusion chamber, and a plurality of fluid outlets of the pump device. The liquid conveying channel represents a cavity which is provided in the housing of the pump device according to the application and which is filled with washing liquid and through which the washing liquid flows during the conveying operation of the pump device. By the successive arrangement of the functional sections of the liquid conveying channel of the pump device according to the application in height, the outlet openings of the washing liquid from the pump inlet to the fluid outlets are guided in the housing along a path which ascends from bottom to top against the direction of gravity. A deflection and / or reflection of the washing liquid in a direction having a component in the direction of gravity, i.e. in a direction opposite to its conveying direction from bottom to top, has been largely avoided. The backflow of the washing liquid conveyed by the impeller has been largely avoided during its passage through the liquid conveying channel from bottom to top. Furthermore, the successive arrangement of the functional sections of the liquid conveying channel facilitates a structural simplification, thus facilitating the manufacture of the pump device according to the application. On the contrary, the pump device can be easily disassembled, for example during maintenance, and each critical component of the pump device according to the application can be easily accessed. Furthermore, by this sequential arrangement of the functional sections of the liquid conveying channel, it can be ensured that, when the drive motor is switched off and the impeller is stopped, the washing liquid can flow completely downwards from the liquid conveying channel via the pump inlet only by the action of gravity. In order to achieve a complete emptying of the liquid conveying channel, it is particularly advantageous if the pump inlet is arranged at the lowest point of the pump device according to the application. In this way, it is avoided that residual water remains in the liquid conveying channel of the housing of the pump device according to the application when the drive motor stops driving the impeller. Thereby, during a washing changeover, from a partial rinsing program, such as a cleaning program, to a subsequent partial rinsing program, such as an intermediate rinsing program or a rinsing program, a so-called entrainment of dirty water and / or lye hardly or completely does not occur. Since now, during a washing changeover, the washing liquid for the respective partial rinsing program can be at least almost completely removed from the pump device according to the application and from the hydraulic circuit, in particular by pumping the pump pit, and new washing liquid, in particular fresh water, can be supplied to the hydraulic circuit for the next partial rinsing program without mixing with the dirty water or residual water of the previous partial rinsing program, the spots caused by dirt particles, lime particles, etc. on the cleaned and subsequently dried objects are less or even completely avoided, thus achieving a better washing result. In particular, the intermediate rinsing program, which was originally arranged between the cleaning program and the rinsing program, can now be performed with less fresh water, if necessary, or even completely omitted, since now it is not necessary to force the residual water or dirty water containing dirt particles and / or cleaning agent out of the pump device.

[0046] According to a further refinement of the application, a liquid-conducting channel, in particular a diffusion chamber, can be provided in the housing of the pump device, which channel is defined in the radial direction of the pump device by the second receptacle and a housing outer part which surrounds the second receptacle, wherein at least one tube heater is provided in the liquid-conducting channel.

[0047] According to a further refinement of the application, the housing can have a housing outer part, in particular a one-piece or integral housing outer part, which defines a liquid-conducting channel which is approximately rotationally symmetrical at least at the center axis, in particular to the fluid outlet, wherein at least one tube heater is provided in the liquid-conducting channel. This makes it possible to further simplify the structure or configuration of the pump device according to the application. The housing of the pump device can consist of only two parts, the housing outer part and the housing inner part, to meet the requirements. In addition, a cover part can be provided, which serves to close the upper opening of the housing inner part. In this way, the stator arranged between the first receptacle and the second receptacle of the housing inner part can be reliably protected from moisture and / or washing liquid. The housing outer part and the housing inner part inserted or immersed therein can be connected to one another, for example, by means of a snap connection, a latching and / or bayonet connection and / or another mechanical coupling. Since the at least one tube heater is arranged in the liquid-conducting channel formed between the housing inner part and the housing outer part, an improved heat transfer between the tube heater and the washing liquid conveyed upward from below by the impeller or pump wheel of the pump device through the liquid-conducting channel is achieved.

[0048] In particular, the second receptacle forms at least one partial portion of the inner delimitation wall of the liquid-conducting channel.

[0049] The tube heater is preferably arranged in the liquid-conducting channel along its flow path behind the impeller of the pump device, in particular at least approximately rotationally symmetrical to the center axis, preferably at least approximately concentric to the second receptacle. Preferably, the liquid-conducting channel is preferably of annular cylindrical design, which is arranged symmetrically with respect to the center axis or central axis, such that in the respective throughflow cross-sectional plane of the liquid-conducting channel, between the tube heater and the inner delimitation wall of the liquid-conducting channel formed by the housing inner part and between the tube heater and the outer delimitation wall of the liquid-conducting channel formed by the housing outer part, for the washing liquid flowing there, at least approximately equal gap widths are formed. As a result, the tube heater can be flowed through by the conveyed washing liquid relatively uniformly, which is advantageous for the heat transfer from the tube heater to the washing liquid flowing therearound.

[0050] In particular, it is sufficient and / or advantageous when the tube heating body is arranged in the liquid-conveying channel in the form of approximately one coil or one partial coil segment and surrounds the central axis, preferably the second receptacle of the inner part of the housing. Thereby, the interference of the tube heating body in the liquid-conveying channel with the flow conditions can be minimized or substantially avoided. In this respect and / or in terms of construction technology, it is particularly advantageous if the coil or coil segment of the tube heating body is arranged at least approximately horizontally or in a plane perpendicular to the central axis. However, it is also possible for the tube heating body to extend in the liquid-conveying channel around the central axis in the form of more than one coil, for example when a higher heat transfer to the washing liquid is required.

[0051] Furthermore, the present application can also relate to a pump device for conveying water for a domestic appliance, in particular for a domestic dishwasher of the above-described embodiments and / or according to claims 1 to 15, see claim 16. The pump device of the present application can be used in particular in a washing machine, a drying machine or another domestic appliance for conveying water. It can be configured in particular as described before and / or according to claims 1 to 15.

[0052] Further possible embodiments of the domestic dishwasher also include combinations of features or embodiments described previously or hereinafter without explicit reference. Here, the skilled person will also add individual aspects as improvements or supplements to the respective basic form of the domestic dishwasher. BRIEF DESCRIPTION OF DRAWINGS

[0053] Further advantageous configurations and aspects of the domestic dishwasher form the subject matter of the dependent claims of the present application and the embodiments of the domestic dishwasher described hereinafter. The domestic dishwasher will be explained in detail in the following with reference to the preferred embodiments in conjunction with the attached drawings.

[0054] Figure 1 schematic perspective view of an embodiment of a domestic dishwasher is shown;

[0055] Figure 2 schematic perspective view of an embodiment of a domestic dishwasher according to Figure 1 schematic sectional view of the domestic dishwasher shown;

[0056] Figure 3 schematic sectional view of an embodiment of a pump device of a domestic dishwasher according to Figure 1 schematic sectional view of the pump device of the domestic dishwasher shown;

[0057] Figure 4 schematic plan view of the pump device according to Figure 3 schematic plan view of the pump device shown;

[0058] Figure 5 schematic plan view of an embodiment of a water-conveying impeller disc of a pump device according to Figure 3 schematic plan view of the water-conveying impeller disc of the pump device shown;

[0059] Figure 6Showing according to Figure 5 A schematic cross-sectional view of the water guide plate shown;

[0060] Figure 7 Showing according to Figure 5 An explosive three-dimensional schematic diagram of the water guide plate shown;

[0061] Figure 8 The diagram is schematically shown in a three-dimensional form according to Figure 5 One implementation of the water guide disc drive ring;

[0062] Figure 9 The diagram is schematically shown in cross-section. Figure 3 An embodiment of a water guide for a pump device;

[0063] Figure 10 The diagram is schematically shown in cross-section. Figure 3 One embodiment of the fluid outlet of the pump device;

[0064] Figure 11 The diagram is schematically shown in a plan view according to Figure 3 An embodiment of a sealing device for a pump device;

[0065] Figure 12 The diagram is schematically shown in cross-section. Figure 11 The sealing device;

[0066] Figure 13 The stator for manufacturing a drive motor and the stator for... are schematically shown in a plan view. Figure 3 One embodiment of the blank of the stator of the water guide drive device of the pump device;

[0067] Figure 14 It shows according to Figure 13 One embodiment of the arrangement of the blanks shown; and

[0068] Figure 15 It schematically shows the situation according to Figure 1 and Figure 2 In the hydraulic circuit of a household dishwasher Figure 3 A schematic cross-sectional view of an improved variant of the pump device based on the preferred embodiment shown.

[0069] In all figures, elements that are identical or have the same function are indicated by the same reference numerals, unless otherwise specified. Detailed Implementation

[0070] Figure 1A schematic perspective view illustrates an embodiment of a household dishwasher 1. The dishwasher 1 includes a washing container 2, which can be closed by a door 3, particularly a waterproof door. For this purpose, a sealing device can be provided between the door 3 and the washing container 2. The washing container 2 is preferably of a cubic structure. The washing container 2 can be housed within the casing of the dishwasher 1. The washing container 2 and the door 3 together form a washing space 4 for washing the items being washed.

[0071] Door 3 Figure 1 The image is shown in the open state. Door 3 can be opened or closed by rotating about a pivot 5 located at its lower end. The loading port 6 of the cleaning container 2 can be opened or closed via door 3. The cleaning container 2 includes a bottom 7, a top plate 8 opposite to the bottom 7, a rear wall 9 opposite to the closed door 3, and two opposite side walls 10 and 11. The bottom 7, top plate 8, rear wall 9, and side walls 10 and 11 may be made of, for example, stainless steel. Alternatively, the bottom 7 may be made of, for example, plastic.

[0072] The household dishwasher 1 also includes at least one dish receiving compartment 12 to 14. Preferably, multiple, for example, three dish receiving compartments 12 to 14 can be provided, wherein dish receiving compartment 12 can be a lower basket, dish receiving compartment 13 can be an upper basket, and dish receiving compartment 14 can be a dish drawer. Figure 1 As further shown, the cleaning material receiving portions 12 to 14 are arranged vertically within the cleaning container 2. Each cleaning material receiving portion 12 to 14 can be selectively moved into or out of the cleaning container 2. In particular, each cleaning material receiving portion 12 to 14 can be pushed into or moved into the cleaning container 2 along the insertion direction E, and can be pulled out or removed from the cleaning container 2 along the pull-out direction A, which is opposite to the insertion direction E.

[0073] Figure 2 A schematic cross-sectional view of a household dishwasher 1 is shown. In addition to the washing container 2, the household dishwasher 1 also includes a base support 15 for supporting the washing container 2. The base support 15 is, for example, a plastic component, particularly a plastic injection-molded component.

[0074] A pump pit 16 is provided at the bottom 7. The pump pit 16 is cup-shaped and... Figure 2 Extending downwards from the bottom 7 in the indicated direction. The pump pit 16 can be a plastic part, especially a plastic injection molded part. A tubular drain outlet 17 extends from the pump pit 16. The pump pit 16 is covered by a filtration system 18. The filtration system 18 may include a coarse filter and a fine filter.

[0075] The drain 17 is connected to a pump device 19. The pump device 19 is a circulation pump, in particular a heating pump, and can therefore also be referred to as such. 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 the washing liquid and / or fresh water F. In addition, the pump device 19 is also designed to introduce heat into the washing liquid and / or fresh water F. The pump device 19 can be fixed on the pump pit 16. Preferably, the pump device 19 is arranged completely or at least partially below the pump pit 16.

[0076] The pump device 19 is essentially designed in a rotational symmetrical structure around a symmetry axis or center axis 20. The center axis 20 is parallel to the direction of gravity g. The pump device 19 comprises a pump 21 which is in fluid connection with the drain 17 by means of a suction pipe 22, so that the pump device 19 can suck the washing liquid and / or fresh water F from the pump pit 16 via the suction pipe 22 and the drain 17.

[0077] In addition to the pump 21, the pump device 19 comprises a water distributor 23 which is integrated in one piece in the pump device 19. By means of the water distributor 23, the washing liquid and / or fresh water F which is conveyed by the pump device 19 can be selectively distributed to different spray devices 24, 25, 26 which are arranged in the washing container 2. By means of the water distributor 23, the spray devices 24, 25, 26 can be selectively brought into or out of the washing liquid and / or fresh water F.

[0078] The spray devices 24, 25 can be spray arms, while the spray device 26 can be a top-mounted rotary spray head. In addition, a switchable intensification spray zone or screen cleaning nozzle (not shown) can also be provided. For example, the spray device 24 can be rotatably supported on the bottom 7, the pump pit 16 or the pump device 19 below the washing object receptacle 12 about a pivot axis 27. The spray device 24 is provided with nozzles which can spray the washing liquid and / or fresh water F upwards into the washing object receptacle 12 in a direction Figure 2 .

[0079] The spray device 25 can be rotatably mounted on the washing object receptacle 13 about a pivot axis 28. The spray device 25 is likewise provided with nozzles which are designed to spray the washing liquid and / or fresh water F downwards and / or upwards in a direction Figure 2 . The spray device 26 can be rotatably supported on the top plate 8 about a pivot axis 29. The spray device 26 sprays the washing liquid and / or fresh water F from above into the washing object receptacle 14 in a direction Figure 2 .

[0080] The spray device 24 is in fluid connection with the pump device 19, in particular with the water distributor 23, by means of a supply pipe 30. By means of the supply pipe 30, the pump device 19 can apply the washing liquid and / or fresh water F to the spray device 24.

[0081] The spray device 25 is equipped with a supply pipe 31 which fluidically connects the spray device 25 with the pump device 19. Via the supply pipe 31, the pump device 19 can apply washing liquid and / or fresh water F to the spray device 25.

[0082] The spray device 26 is equipped with a supply pipe 32 which fluidically connects the spray device 26 with the pump device 19. Via the supply pipe 32, the pump device 19 can apply washing liquid and / or fresh water F to the spray device 26.

[0083] Each spray device 24, 25, 26 can be equipped with an individual supply pipe 30, 31, 32, respectively. Alternatively, all spray devices 24, 25, 26 can also share one supply pipe which is then branched. In particular, the supply pipes 30, 31, 32 are formed by one common component, in particular one common plastic injection-molded component. The supply pipes 30, 31, 32 are guided along the rear wall 9 from the bottom 7 in the direction of the top plate 8. Here, the supply pipes 30, 31, 32 or at least parts of the supply pipes 30, 31, 32 can pass through the filter system 18.

[0084] The pump device 19 is preferably equipped with a separate interface or fluid outlet for each supply pipe 30, 31, 32. The pump device 19, the spray devices 24, 25, 26 and the supply pipes 30, 31, 32 together form a hydraulic circuit 33 of the domestic dishwasher 1. The pump device 19 circulates washing liquid and / or fresh water F in the hydraulic circuit 33. The pump device 19 can be an integral part of the hydraulic circuit 33. However, this is not mandatory.

[0085] The domestic dishwasher 1 also comprises a regulating and control device 34. Via the regulating and control device 34, different washing programs of the domestic dishwasher 1 can be executed, for example. To this end, washing programs can be preset or stored in the regulating and control device 34. The regulating and control device 34 is preferably arranged outside the washing tub 2.

[0086] The regulating and control device 34 can be arranged inside or above the door 3. Preferably, the regulating and control device 34 is arranged at the upper edge (not shown) of the door 3. The regulating and control device 34 can also be integrated in the base frame 15. The regulating and control device 34 can be operated or actuated via not shown operating elements. The operating elements can comprise, for example, pushbuttons, knobs and / or a touch screen. These can be mounted on the door 3.

[0087] The pump device 19 can be controlled by means of the regulating and control device 34. For example, the pump 21 can be started and / or stopped and / or its rotational speed can be adjusted by means of the regulating and control device 34. The control and regulating device 34 can receive and analyze information from the pump device 19, for example the rotational speed of the pump 21 and / or the motor current of the pump 21. Furthermore, the control and regulating device 34 can also control the water guide 23 in order to selectively switch on or off the spray devices 24, 25, 26.

[0088] A washing object G to be washed is arranged in the washing container 2. The washing object G can comprise, for example, glasses, plates, pots, bowls, cutlery or similar items. In particular, the washing object G is accommodated in the washing object receptacle 12, 13, 14, which is not shown in the figures. By means of the spray devices 24, 25, 26, washing liquid and / or fresh water F can be applied to the washing object G. Figure 2

[0089] Figure 3 A cross-sectional view of an embodiment of a pump device 19 as described above is shown schematically. The pump device 19 is provided with an axial direction AX, which extends from bottom to top in the direction of the central axis 20. The axial direction AX coincides with or is parallel to the central axis 20. Furthermore, the pump device 19 is provided with a radial direction R. The radial direction R is perpendicular to the central axis 20 and extends outwardly from the central axis. The axial direction AX and the radial direction R are perpendicular to each other. Figure 3

[0090] As described above, the pump device 19 comprises a pump 21 and a water guide 23. The pump device 19 differs from the pump 21 in that the pump device 19 is provided with the water guide 23 in addition to the pump 21.

[0091] The pump device 19 is equipped with a housing 35, which comprises a housing lower part 36, a housing upper part 37 and a housing inner part 38. The housing lower part 36 is provided with a pump inlet 39, to which the suction pipe 22 is connected. For example, the suction pipe 22 is fixed to the pump inlet 39 and is sealed by means of a sealing element, for example an O-ring. The housing 35 is essentially rotationally symmetrical around the central axis 20.

[0092] A tube heating element 40 is arranged between the housing lower part 36 and the housing upper part 37. The tube heating element 40 is preferably a thick-film heating element. The tube heating element 40 is sealed between the housing lower part 36 and the housing upper part 37 by means of a sealing element, for example an O-ring. The tube heating element 40 is tubular or hollow-cylindrical in structure. The tube heating element 40 is rotationally symmetrical around the central axis 20. Thus, the tube heating element 40 is held between the housing lower part 36 and the housing upper part 37. During operation of the pump device 19, washing liquid and / or fresh water F flows along the inside of the tube heating element 40.

[0093] ​​The lower housing component 36 and the upper housing component 37 are connected together by a form-fitting mechanism (not shown). For this purpose, a snap hook, spring hook, or similar structure can be provided to achieve the form-fitting connection between the lower housing component 36 and the upper housing component 37. The form-fitting connection is achieved through the mutual engagement or interlocking of two connecting components, in this example, the lower housing component 36 and the upper housing component 37. The inner housing component 38 is connected to the upper housing component 37 by a form-fitting mechanism. For this purpose, a corresponding snap hook, spring hook, or similar structure is also provided. The lower housing component 36, the upper housing component 37, and the inner housing component 38 are all plastic components, especially injection-molded plastic components.

[0094] The lower housing component 36 houses an impeller 41, which is positioned downstream of the pump inlet 39. The impeller 41 is driven by a drive motor 42, which is an electric motor. The impeller 41 may also be referred to as a blade. The drive motor 42 includes a drive shaft 43 fixedly connected to the impeller 41, which rotates about a central axis 20 during operation of the pump assembly 19. In addition to the impeller 41, the rotor 44 of the drive motor 42 is fixedly connected to the drive shaft 43.

[0095] The rotor 44 is rotatably supported about a central axis 20 within a cup-shaped first receiving portion 45 of the housing component 38. The first receiving portion 45 surrounds a receiving space 46 in which the rotor 44 is disposed. The receiving space 46 can be filled with washing liquid and / or fresh water F. Figure 3 In the direction shown, the lower part of the first receiving portion 45, i.e., the side facing the impeller 41, is closed by the closing device 47. The drive shaft 43 passes through the closing device 47 and can be supported thereon.

[0096] In addition to the first receiving portion 45, the internal component 38 of the housing also includes a second receiving portion 48. The second receiving portion 48 is also a cup-shaped structure. Compared to the first receiving portion 45, the second receiving portion 48... Figure 3 The opening shown is on the upper side, not the lower side. The first receiving portion 45 is disposed inside the second receiving portion 48. Therefore, the diameter of the second receiving portion 48 is larger than the diameter of the first receiving portion 45.

[0097] An annular receiving space 49 is provided between the first receiving portion 45 and the second receiving portion 48. The stator 50 of the drive motor 42 is disposed within the receiving space 49. The stator 50 can be bonded to the first receiving portion 45 and / or the second receiving portion 48.

[0098] Pump 21 is specifically composed of a drive motor 42, an impeller 41, and at least part of a housing 35. A pipe heating element 40 may also be part of pump 21. In particular, the two receiving portions 45, 48 of the housing internal component 38 are part of pump 21. Conversely, pump assembly 19, in addition to including pump 21, also includes a water guide 23.

[0099] Figure 4 A plan view of the pump device 19 is shown schematically. The housing inner part 38 is provided with a plurality of fluid outlets 51, 52, 53, 54 to which the supply pipes 30, 31, 32 are connected. In the case where three spray devices 24, 25, 26 are provided, there are also exactly three fluid outlets 51, 52, 53, 54 provided. In the case where four spray devices 24, 25, 26 are provided, for example, there are also four fluid outlets 51, 52, 53, 54 provided accordingly.

[0100] In the present case, the fluid outlet 51 is assigned to the spray device 24. The fluid outlet 51 can at the same time serve as a support for the spray device 24. The fluid outlet 52 is an additional outlet, which can be assigned to a not shown intensifying spray zone, for example. The fluid outlet 53 is assigned to the spray device 26 and the fluid outlet 54 is assigned to the spray device 25. The correspondence, however, can also be chosen in another way.

[0101] The fluid outlets 51, 52, 53, 54 are of a tubular design and extend along the central axis 20 or in the axial direction AX. In the process, the fluid outlets 51, 52, 53, 54 can each have a circular, elliptical or oval cross section. Via the fluid outlets 51, 52, 53, 54, washing liquid and / or fresh water F can be discharged during operation of the pump device 19.

[0102] The fluid outlets 51, 52, 53, 54 project from an end face closure plate 55 of the housing upper part 37 of the housing inner part 38. Around the closure plate 55, a tubular or hollow cylindrical connection section 56 is provided, by means of which the housing inner part 38 is connected to the housing upper part 37.

[0103] Now returning to Figure 2 Between the housing inner part 38, in particular the closure plate 55, and the housing upper part 37, a water guide disc 57 is provided, which is rotatable about the central axis 20 and which is arranged in the Figure 5 plan view. Figure 6 A sectional view of the water guide disc 57 is shown schematically. Figure 7 An exploded perspective view of the water guide disc 57 is shown schematically. The water guide disc 57 is of a two-part design and comprises a circular ring disc 58 and a drive ring 59, which is shown separately in a schematic perspective view in Figure 8 .

[0104] The water guide disc 57 is an integral part of the water guide 23. The water guide disc 57 is rotationally symmetrical with respect to the central axis 20. The water guide disc 57 is provided with a central through hole 60. The through hole 60 is provided, inter alia, in the circular ring disc 58. The through hole 60 is preferably circular. In addition, the water guide disc 57 is provided with a plurality of through holes 61, 62, 63, which extend through the circular ring disc 58. By rotating the water guide disc 57, the fluid outlets 51, 52, 53, 54 can be selectively blocked or opened.

[0105] The through holes 61, 62, 63 can be circular. The through holes 61, 62, 63 can be oblong. By means of the oblong geometry, a plurality of fluid outlets 51, 52, 53, 54 can be opened at the same time. The number of through holes 61, 62, 63 can correspond to the number of fluid outlets 51, 52, 53. However, this is not mandatory. By means of the water guide disc 57, in particular the circular ring disc 58, the fluid outlets 51, 52, 53, 54 can be combined arbitrarily. For example, the fluid outlets 51, 52 can be opened and the fluid outlets 53, 54 can be closed.

[0106] The water guide disc 57, in particular the circular ring disc 58, is guided on the inside of the through hole 60 by guide sections 64, 65, 66, which enable the water guide disc 57 to be rotated about the central axis 20. The number of guide sections 64, 65, 66 can be chosen arbitrarily. However, it is particularly preferred for three guide sections 64, 65, 66 to be provided, which are distributed uniformly about the central axis 20. The guide sections 64, 65, 66 are, inter alia, an integral part of the housing inner part 38. Between the guide sections 64, 65, 66, the washing liquor and / or the fresh water F can flow radially inwards from the water guide disc 57, towards the central axis 20. However, it is also possible for a continuous annular guide section (not shown) to be provided instead of the guide sections 64, 65, 66, which are spaced apart from one another. In this case, the guide section is provided with a drain opening towards the central axis 20.

[0107] The circular ring disc 58 is provided on the side remote from the through hole 60 with outer recesses 67, 68, 69. Preferably, exactly three recesses 67, 68, 69 are provided. The recesses 67, 68, 69 are preferably arranged in an uneven manner about the central axis 20.

[0108] The drive ring 59 has an annular base portion 70. On the outside of the base portion 70, a circumferential toothing 71, in particular a helical toothing, is provided. From the upper end face 72 (see Fig. 2) of the base portion 70, the toothing 71 extends in a helical manner in the direction of the central axis 20. Figure 8) extend. The drivers 73, 74, 75 are designed to engage in a form-fit into the recesses 67, 68, 69 of the circular disk 58, so that the drive ring 59 is connected in a form-fit to the circular disk 58. The drivers 73, 74, 75 are preferably distributed in a non-uniform manner around the center axis 20, so that during assembly of the circular disk 58 and the drive ring 59, an encoding is achieved, which prevents incorrect assembly (error-proofing).

[0109] Viewed along the center axis 20 or in the axial direction AX, the circular disk 58 can be lifted off the drive ring 59, so that the circular disk 58 can float on the washing liquid and / or fresh water F during operation of the pump device 19. The form-fit connection between the circular disk 58 and the drive ring 59, however, remains.

[0110] The water guide disk 57 or the circular disk 58 can open and close the different fluid outlets 51, 52, 53, 54 as required and is designed as a ring structure, so that it can be guided on the initial diameter or support diameter on its inner side and can be driven on its outer side, as will be explained further below. Preferably, the inner diameter of the circular disk 58 is greater than the outer diameter of the stator 50 of the drive motor 42. Due to this arrangement, at least three fluid outlets 51, 52, 53, 54 can be opened and closed in a corresponding combination on the same pitch circle. It is also possible to provide four or five fluid outlets 51, 52, 53, 54. Furthermore, it is also possible to arrange the fluid outlets 51, 52, 53, 54 further apart from each other in a geometrical sense, which was not possible in previous solutions, so that the path to the different spray devices 24, 25, 26 is shortened.

[0111] Figure 9 A cross-sectional view of an embodiment of a water guide 23 as described above is shown schematically. The water guide 23 comprises, in addition to the circular disk 58 (not shown) and the drive ring 59, at least parts of the housing inner part 38, i.e. the fluid outlets 51, 52, 53, 54 and the closure plate 55, at least parts of the housing upper part 37 and water guide drive means 76 for rotating the water guide disk 57 about the center axis 20, so that the fluid outlets 51, 52, 53, 54 can be selectively closed or opened.

[0112] The water guide drive means 76 comprise a first housing part 77, which is integrally formed with the housing upper part 37. A second housing part 78 is connected in a form-fit, in particular by a snap or click connection, to the first housing part 77, wherein the second housing part 78 encloses the first housing part 77. A sealing element, for example an O-ring, can be provided between the first housing part 77 and the second housing part 78. The housing parts 77 and 78 enclose an inner space 79, which is filled with washing liquid and / or fresh water F when the pump device 19 is in operation.

[0113] The water guide drive 76 further comprises a stator 80 mounted on the outside of the second housing part 78 and a rotatable rotor 81 arranged in the interior space 79. The rotor 81 is fixedly connected to a drive shaft 82 which is rotatably supported on both housing parts 77 and 78. A worm 83 is mounted on the drive shaft 82 which engages into the toothing 71 of the drive ring 59. The lower edge of the worm 83 is arranged not lower than the lower edge of the drive ring 59 so that the interior space 79 can be drained. The water guide drive 76 is a wet rotor. The water guide drive 76 is an electric motor.

[0114] The drive ring 59 is accommodated in an annular groove 84 which is integrally formed at the upper housing part 37 and which is filled with washing liquid and / or fresh water F. A plurality of guide plates 85, 86, 87, 88 project radially into the annular groove 84 in which the drive ring 59 is guided on its inside. The number of guide plates 85, 86, 87, 88 is arbitrary. Preferably, at least three guide plates 85, 86, 87, 88 are provided. The annular groove 84 can be drained in the direction of the central axis 20 via a drain 89. The interior space 79 is in fluid connection with the annular groove 84. Thus, the interior space 79 can also be drained in the direction of the central axis 20 via the annular groove 84 and the drain 89.

[0115] The interior space 79 and the annular groove 84 together form a fluid chamber 90 which is filled with washing liquid and / or fresh water F. The rotor 81, the drive shaft 82, the worm 83 and the drive ring 59 are arranged in the fluid chamber 90. Thus, no moving sealing elements are required.

[0116] In order to be able to adjust the required electrical input power and the direction of rotation of the water guide drive 76, the water guide drive 76 is designed as a brushless electric motor. In particular, the water guide drive 76 is a permanent magnet synchronous motor (PMSM). Preferably, the water guide drive 76 is a brushless direct current motor (BLDC) and uses electronic commutation. The water guide drive 76 can also be a brushless alternating current motor (BLAC).

[0117] The water guide drive 76 is designed as a wet rotor so that no wear occurs due to moving sealing elements during operation of the pump device 19. Furthermore, the worm 83 is arranged on the output shaft 82 so that the maximum transmission ratio is achieved by a single stage of gearing, so that the maximum torque is transmitted to the water guide disc 57 with as low an electrical input power as possible. The transmission ratio between the worm 83 and the drive ring 59 is preferably 1 : 50 to 1 : 250. The rotor 81 preferably uses a hard ferrite ring as material. Thus, no corrosion protection is required.

[0118] The advantages of the above-described arrangement include that, by reducing the losses caused by the moving seal, the pump device 19 is sealed without wear over its entire service life, and that, as a result of the worm 83 being able to remove dirt from the toothing 71 of the drive ring 59 when rotating, the gear mechanism has good dirt resistance. This is particularly advantageous compared to spur gear toothing. The worm 83 is preferably designed as a spherical toothing.

[0119] In addition, a change in the direction of rotation and an adjustment of the rotational speed can also be implemented. The largest possible transmission ratio can be achieved by means of only one transmission stage. The worm 83 can be designed as a single-start structure. The drive ring 59 has the largest possible diameter in order to achieve the largest possible transmission ratio, so that the largest possible torque is generated by the water guide drive 76 with the smallest possible water guide. This contributes to resource conservation.

[0120] Depending on the type of motor selected for the water guide drive 76, suitable sensor functions can be integrated. The water guide drive 76 can be positioned at 90° or a specific angle with respect to the drive ring 59, so that dead angles are avoided and the risk of residual washing liquid and / or fresh water F or dirt is prevented. The water guide 23 thus has a dirt resistance.

[0121] By means of the worm 83 and the toothing 71 of the drive ring 59, a self-locking can be achieved, so that an unintended rotation of the water guide disc 57 is prevented. The high transmission ratio ensures that the water guide disc 57 can always be reliably rotated, even if there is a high friction between the drive ring 59 and the housing upper part 37.

[0122] The above-described arrangement has a number of advantages. In particular, there is no need for a pressurized sealing point between the pump 21 and the water guide 23. As a result, the construction height can be reduced, so that the required installation space is reduced. At the same time, the water consumption and the so-called circulation water quantity can be reduced. By means of the pump device 19, a more efficient circulation pump system can be implemented. More possible state and / or opening and closing combinations of the fluid outlets 51, 52, 53, 54 can be implemented. A uniform flow towards the fluid outlets 51, 52, 53, 54 can be achieved. In addition, a spatial separation of the fluid outlets 51, 52, 53, 54 can be achieved.

[0123] The water guide disc 57 is thus designed as a two-part structure within the pump device 19. The circular disc 58, which functions as a bore disc, is separated from the drive ring 59, which functions as a drive element for the circular disc 58. This structure makes it possible to drive the drive ring 59 tangentially by means of the toothing 71, so that the bearing gap between the drive ring 59 and the drive worm 83 can be optimally adjusted. In addition, the circular disc 58 can be mounted in a floating manner on the drive ring 59, so that, in the presence of a water pressure, the circular disc 58 can float upwards in the axial direction AX from the drive ring 59, so that the closed fluid outlets 51, 52, 53, 54 are better sealed.

[0124] The floating height of the circular disc 58 can be between 0.2 mm and 2 mm to create as little flow loss as possible in the support area between the circular disc 58 and the drive ring 59. The arrangement of the driving elements 73, 74, 75 on the drive ring 59 makes it possible to mount the circular disc 58 in only one defined position (error protection). The drive ring 59 and the circular disc 58 are preferably made of a plastic material, for example polyoxymethylene (POM). The inner diameter of the drive ring 59 and the circular disc 58 can be between 50 mm and 120 mm. The outer diameter can vary between 90 mm and 200 mm. The thickness of the circular disc 58 is for example 1.4 mm to ensure a certain flexibility. Preferably, the thickness is in the range of 0.8 mm to 3 mm.

[0125] Thus, a floating support of the circular disc 58 can be advantageously realized. By providing the through-holes 61, 62, 63 in the circular disc 58 on the same pitch circle, as many output combinations as possible can be obtained. By floating support, a good sealing performance of the not opened fluid outlets 51, 52, 53, 54 can be achieved. By the two-part structure of the draft tube disc 57, a floating simplification of the circular disc 58 is achieved. This reduces the risk of tilting and / or jamming of the circular disc 58.

[0126] The floating support of the circular disc 58 decouples it from the support gap of the draft tube drive 76. The complexity of the different draft tube discs 57 is transferred to a component which is easy to manufacture in terms of structure, namely the circular disc 58. Thereby, an exact support of the draft tube drive 76 can be achieved in order to obtain more exact shaft spacing tolerances in the transmission stage, since the drive ring 59 does not or less floats and maintains its positional relationship to the worm 83 as driving element.

[0127] Thereby, a defined meshing of the worm 83 with the drive ring 59 is achieved. The draft tube 23 is easy to maintain, since the drive ring 59 can be replaced independently of the circular disc 58 when it is worn. A reduction of the friction between the drive ring 59 and the housing 35 is achieved when the pump device 19 is switched off. This leads to a reduction of wear. The circular disc 58 can be uniformly supplied from below, so that the risk of tilting of the circular disc 58 is reduced. No multiple closing devices are required in the pump device 19, only one closing device in the form of the circular disc 58.

[0128] Figure 10 A cross-sectional view of one embodiment of the fluid outlet 51 is shown. All the following explanations regarding the fluid outlet 51 also apply to the fluid outlets 52, 53, 54. Figure 10 The fluid outlet 51 extends in the shown direction from the upper side of the closing plate 55. The fluid outlet 51 has a non-symmetrical funnel geometry.

[0129] The fluid outlet 51 comprises a tubular connection section 91. The cross section of the connection section 91 can be circular, oval or elliptical. The advantage of an oval cross section is that installation space can be saved in the radial direction R and a greater flow cross section can be achieved in the radial direction R with the same installation space compared to a circular cross section. The connection section 91 is connected to one of the supply pipes 30, 31 or 32.

[0130] Now returning to Figure 3 Between the housing lower part 36, the tube heating element 40, the housing upper part 37 and the second receiving portion 48 of the housing inner part 38, an annular diffusion chamber 92 is formed which surrounds the central axis 20. The diffusion chamber 92 extends from the pump inlet 39 in the direction of the water guide disc 57. The diffusion chamber 92 is of rotational symmetry with respect to the central axis 20. In front of the water guide disc 57, the diffusion chamber 92 expands and distributes the washing liquid and / or fresh water F to the water guide disc 57. The water guide 23 or the water guide disc 57 is integrated in the diffusion chamber 92. The fluid outlets 51, 52, 53, 54 are discharged from the diffusion chamber 92.

[0131] In the annular diffusion chamber 92, the washing liquid and / or fresh water F flows in the flow direction S (indicated by the arrow) around the central axis 20 in an annular manner and is applied to the spray devices 24, 25, 26 via the fluid outlets 51, 52, 53, 54 opened by means of the water guide 23 in the axial direction AX to the respective supply pipe 30, 31, 32. Figure 4

[0132] As shown in Figure 10 , the connection section 91 adjoins a transition section 93 by means of which the tubular connection section 91 is connected to the closure plate 55. The transition section 93 has the geometry of an asymmetric funnel as described above, which can also be referred to as a shoe shape.

[0133] The transition section 93 has a rounding or radius 94. On the side opposite the radius 94, a bevel 95 is provided which is connected to the closure plate 55 by means of a radius 96 and to the connection section 91 by means of a radius 97. The transition section 93 completely surrounds the connection section 91, the radii 94, 96, 97 and the bevel 95 transition into one another.

[0134] The geometry of the fluid outlet 51 is adapted in the preferred flow direction S in the pump device 19 by means of the radii 94, 96, 97 and the bevel 95 and the asymmetric geometry formed thereby towards the connection section 91, so that the washing liquid and / or fresh water F can flow optimally into the fluid outlet 51.

[0135] ​This asymmetrical geometry, also known as a shoe-shaped geometry, forms a small helical shell for the fluid outlet 51. Furthermore, the radii 94 and 96 of the fluid outlet 51 are continued by radii 98 and 99 at the through holes 61, 62, and 63 on the annular disk 58 of the water guide 23. Additionally, a radius 94 is also provided on the backflow side of the fluid outlet 51, allowing washing liquid and / or fresh water F to flow into the fluid outlet 51 against the flow direction S. The fluid outlet 51 or connecting section 91 preferably adopts an elliptical cross-sectional geometry, which expands the flow cross-sectional area without increasing the diameter of the water guide disk 57 and / or the pump device 19.

[0136] like Figure 10 As shown, the advantage of this arrangement is that it enables optimal guidance of the washing liquid and / or fresh water F at the fluid outlet 51, thereby achieving the highest possible hydraulic efficiency for the pump assembly 19. Since no or minimal turbulence is generated when the washing liquid and / or fresh water F flows into the fluid outlet 51, optimal utilization of the flow cross-section of the fluid outlet 51 is achieved, allowing full utilization of its entire flow cross-section. The fluid outlet 51 or connecting section 91 preferably has an elliptical cross-section, which increases the flow cross-section without increasing the diameter of the guide vane disc 57 of the guide vane 23, thus making the pump assembly 19 more compact.

[0137] Figure 11 A plan view of one embodiment of the sealing device 100 is shown schematically. Figure 12 A schematic cross-sectional view of the sealing device 100 is shown. The sealing device 100 is used to achieve a fluid seal between the tube heating element 40 and the lower housing component 36.

[0138] The sealing device 100 is rotationally symmetrical with respect to the central axis 20. The sealing device 100 is a sealing ring. The sealing device 100 includes a V-shaped receiving portion 101 disposed within a suitably shaped annular groove in the lower housing component 36. The receiving portion 101 has an annular groove 102 extending completely around the central axis 20, within which the tube heating element 40 is disposed. The annular groove 102 is located between the first leg 103 and the second leg 104 of the receiving portion 101.

[0139] A deflection section 105 extends above the second leg 104. This deflection section is used to guide the washing liquid and / or fresh water F in the axial AX direction, as shown by arrow 106. An annular support surface 107 is provided on the lower side of the deflection section 105, through which the deflection section 105 is internally engaged with the lower housing component 36.

[0140] The deflection section 105 is provided with a radius 108 on the side facing away from the bearing surface 107. By means of the radius 108, the washing liquid and / or fresh water F is guided, as indicated by the arrow 106. The radius 108 constitutes the fluid side of the sealing device 100. On the deflection section 105, a cylindrical outer surface 109 is provided which is rotationally symmetrical about the central axis 20. By means of the outer surface 109, the deflection section 105 is joined on the inside with the tube heating element 40.

[0141] The sealing device 100 seals and fixes the tube heating element 40, while at the same time, by means of the radius 108 or the chamfer, the washing liquid and / or fresh water F flowing from the impeller 41 is guided upwards to the tube heating element 40. No residual washing liquid and / or fresh water F is formed inside the pump device 19. An optimization of the hydraulic efficiency of the pump device 19 is achieved, residual washing liquid and / or fresh water F inside the pump device 19 is avoided, and the circulation volume is reduced, in particular the dead volume of the pump device 19.

[0142] The sealing device 100 fixes the tube heating element 40 inside the pump device 19 and at the same time seals it. Furthermore, the sealing device 100 forms a hydraulically optimized geometry by means of the radius 108 in order to optimize the hydraulic efficiency of the pump device 19 and to minimize residual washing liquid and / or fresh water F inside the pump device 19 after emptying.

[0143] The V-shaped receptacle 101 fixes and seals the tube heating element 40 and at the same time, by means of the aforementioned chamfer or radius 108, on the fluid side of the sealing device 100, the washing liquid and / or fresh water F flowing from the impeller 41 is gently guided upwards to the tube heating element 40. Furthermore, this also fills the aforementioned annular groove in the lower housing part 36, and no residual washing liquid and / or fresh water F is formed inside the pump device 19.

[0144] The advantages of the above-described structure include an optimization of the hydraulic efficiency of the pump device 19, an avoidance of residual washing liquid and / or fresh water F inside the pump device 19, a more hygienic design, and a reduction of the circulation volume of the washing liquid and / or fresh water F, which reduces the dead volume.

[0145] Returning again to Figure 3 When the pump device 19 is in operation, the impeller 41 sucks in washing liquid and / or fresh water F by means of the suction pipe 22 connected to the pump inlet 39. The washing liquid and / or fresh water F is conveyed upwards by the diffuser chamber 92 to the water guide 23, in particular towards the water guide disc 57. The washing liquid and / or fresh water F flows through the pump inlet 39 into the diffuser chamber 92, where it flows outwards in the radial direction R to the radius 108 of the sealing device 100 and is guided by it in the direction Figure 3 upwards and in the axial direction AX, i.e. against the gravitational force direction g, to the water guide disc 57.

[0146] Within the diffusion chamber 92, the washing liquid and / or fresh water F flows in a flow direction S around the central axis 20. In the present case, the flow direction S is counterclockwise. However, the flow direction S can also be clockwise. The annular disk 58 of the water conductor disk 57 floats on the washing liquid and / or fresh water F, is lifted from the end face 72 of the drive ring 59 and is pressed against the closing plate 55 on the inside.

[0147] Thereby, a seal between the annular disk 58 and the closing plate 55 is achieved, so that the washing liquid and / or fresh water F can only flow out of the pump device 19 through the fluid outlets 51, 52, 53, 54, which are opened by the annular disk 58. Even in the case of a lifting of the annular disk 58 from the drive ring 59, the form-fit connection between the annular disk 58 and the drive ring 59 continues to be maintained, so that the water conductor drive 76 can still rotate the water conductor disk 57.

[0148] During operation of the pump device 19, the regulating and control device 34 can drive the water conductor drive 76 in order to rotate the water conductor disk 57 and thereby selectively open and / or close individual or all fluid outlets 51, 52, 53, 54. Thereby, the spray devices 24, 25, 26 can be opened or closed, respectively. Thus, for example, it is possible to apply washing liquid and / or fresh water F selectively only to the spray devices 24, 25 and not to the spray device 26.

[0149] Thus, the spray devices 24, 25, 26 can be activated or deactivated arbitrarily. The arbitrary activation or deactivation of the spray devices 24, 25, 26 is preferably carried out during a washing process which is carried out by means of a washing program. The washing program can be stored in the regulating and control device 34. An arbitrary number of different washing programs can be stored in the regulating and control device 34.

[0150] The pump inlet 39 constitutes in particular the lowest point of the pump device 19. This makes it possible for the washing liquid and / or fresh water F to be completely discharged from the pump device 19 under the action of gravity, as is indicated by the arrow 110 in Fig. 1. Figure 3

[0151] The structural design of the pump device 19 described above makes it possible to minimize the phenomenon of washing liquid being carried from one washing tank to the next during a washing process in the domestic dishwasher 1. This objective is achieved in particular in that the residual amount of washing liquid and / or fresh water F in the pump pit 16 after the pumping is minimized. One important effect of the reduction in the residual amount of washing liquid and / or fresh water F is an improvement in the so-called spotting value after drying. This is because less cleaning agent and dirt residue on the dishes dries and becomes visible when the amount of lye which enters the rinsing bath is reduced.

[0152] ​To ensure that the pump device 19 can be completely emptied, the drive motor 42 is arranged perpendicularly to the impeller 41. That is, the central axis 20 is parallel to the direction of gravity g. Likewise, the fluid outlets 51, 52, 53, 54 are arranged perpendicularly. To ensure as low a construction height as possible, the water guide 23 is integrated in the pump device 19. The diffusion chamber 92 of the pump device 19 is preferably an annular gap, which surrounds the drive motor 42 and is defined by the tube heating element 40.

[0153] The typical distance between the drive motor 42 and the tube heating element 40 or the gap width of the diffusion chamber 92 is between 3 mm and 12 mm. By this arrangement, it is also possible to take away the residual heat of the drive motor 42 by the washing liquid and / or fresh water F. Furthermore, by this construction it is possible to ensure an optimum evacuation of the pump device 19, since there is no air cavity in the upper region of the pump device 19, in particular in the region of the water guide 23.

[0154] This means that, when the pump pit 16 is filled with washing liquid and / or fresh water F, the pump device 19 is also filled with washing liquid and / or fresh water F synchronously like two communicating vessels and no air cavity is formed, which is advantageous for the unimpeded operation of the pump device 19. The fluid outlets 51, 52, 53, 54 of the water guide 23 leading to the spray devices 24, 25, 26 are located on a circular ring and can be optimally arranged there. Here, at least some of the fluid outlets 51, 52, 53, 54 can not be circular, but rather have an elliptical flow cross section.

[0155] When a draining operation is carried out with the pump device 19, all of the washing liquid and / or fresh water F will flow back into the pump pit 16. The effect of this is to improve the washing result. In particular, this will result in fewer spots on the laundry G to be washed. Complete evacuation can be achieved without any additional measures. The drive motor 42 can be cooled or cooled by the contact of the stator 50 with the diffusion chamber 92. Here, only the second receptacle 48, i.e. the portion defining the diffusion chamber 92, is arranged between the stator 50 and the diffusion chamber 92. In this way, the pump device 19 achieves a very compact construction design, which leads to a corresponding space utilization advantage.

[0156] In summary, as a function of the height, in succession from bottom to top along the central axis 20, the pump device 19 has, as a liquid conveying channel 121, in succession from bottom to top along the central axis 20, a pump inlet 39, a pump chamber or impeller chamber 119 in which a rotatably driven impeller 41 for applying the washing liquid F is arranged, a pressure and / or diffusion chamber 92 arranged after the pump chamber 119, a rotatable water guide element 57 arranged at the upper end of the pressure and / or diffusion chamber 92, and a plurality of fluid outlets 51, 52, 53, 54 of the pump device 19, for example. The liquid conveying channel is understood to mean a cavity arranged in the housing 35 of the pump device 19, which is filled and flows through by the washing liquid F during the conveying operation of the pump device 19. By virtue of the successive arrangement of the functional sections of the pump device liquid conveying channel 121 in terms of height, the washing liquid F is conveyed in the housing 35 from the pump inlet 39 to the respective outlet 51, 52, 53, 54 of the fluid outlets A51, A52, A53, A54 in the direction of the gravitational force g from bottom to top. Deflection and / or reflection of the washing liquid F with a directional component in the direction of the gravitational force g, i.e. in a direction opposite to the conveying direction from bottom to top, has been largely avoided. The counterflow of the washing liquid F conveyed by the impeller 41 has been largely avoided during its passage through the liquid conveying channel 121 from bottom to top. Furthermore, the successive arrangement of the functional sections of the liquid conveying channel 121 facilitates the structural simplification of the pump device 19 and the resulting ease of manufacture. In contrast, for example, during servicing, it can be easily disassembled and each of the main components of the pump device can be accessed. Furthermore, by virtue of this sequence of the functional sections of the liquid conveying channel 121, it can be ensured that, when the drive motor 42 for the impeller 41 is switched off and the impeller 41 is stopped, the washing liquid F can flow out completely downwards via the pump inlet 39 only by virtue of the action of the gravitational force. In order to achieve as complete an emptying of the liquid conveying channel 121 as possible, it is particularly advantageous if the pump inlet 39 is arranged at the lowest point of the pump device 19. In this way, it is possible to avoid residual moisture remaining in the liquid conveying channel 121 in the housing 35 of the pump device 19 when the drive motor 42 stops the impeller 41. Thus, during a bath change, when switching from a partial washing program, for example a cleaning program, to a subsequent partial washing program, for example an intermediate rinsing program or a rinsing program, a so-called dirty water and / or lye entrainment phenomenon hardly or not at all occurs. Because now, during a bath change, the washing liquid for the respective partial rinsing program can be at least almost completely removed from the pump device 19 and from the hydraulic circuit, in particular by means of the pump inlet 39, the pump chamber 119 and the pressure and / or diffusion chamber 92, which are arranged in succession from bottom to top along the central axis 20, and the water guide element 57 arranged at the upper end of the pressure and / or diffusion chamber 92, which can be rotated about the central axis 20. Figure 2 、 Figure 3The pump pit 16 is evacuated by a not depicted evacuation pump and can be replenished with fresh washing liquid, in particular fresh water, for the next partial rinsing program of the hydraulic circuit 33 without mixing with the dirty or residual water of the previous partial rinsing program. Thus, on the cleaned and subsequently dried laundry G, spots caused by dirt particles, lime particles, etc. are less or even completely absent, resulting in a better washing result. In particular, the intermediate rinsing program, which was originally provided between the washing program and the rinsing program, can now be performed with less fresh water, if necessary, or even completely omitted, since it is now not necessary to force the residual water or the dirty water containing dirt particles and / or cleaning agent out of the pump device 19.

[0157] Figure 13 A plan view of an embodiment of a blank 111 for manufacturing the stator 50 of the drive motor 42 and the stator 80 of the water guide drive device 76 is schematically shown. Figure 14 An arrangement 112 is shown, which comprises a first stator lamination 113 corresponding to the stator 50 and a second stator lamination 114 corresponding to the stator 80.

[0158] The arrangement 112 is made from the blank 111. The blank 111 can be circular. However, the blank 111 can in principle have an arbitrary geometry. The arrangement 112 can be manufactured from the blank 111 by a stamping process. In manufacturing the arrangement 112, the first stator lamination 113 and the second stator lamination 114 can be formed simultaneously. The stator 50 is made from the laminations of the first stator lamination 113. Correspondingly, the stator 80 is made from the laminations of the second stator lamination 114.

[0159] The first stator lamination 113 has an annular segment 115 from which a plurality of root segments 116 extend inwardly. At the root segments 116, the first stator lamination 113 has an inner diameter di. The second stator lamination 114 likewise has an annular segment 117 from which a plurality of root segments 118 extend inwardly. The annular segment 117 has an outer diameter da, which is smaller than the inner diameter di, so that the second stator lamination 114 can be arranged inside the first stator lamination 113.

[0160] Thus, the stator 50 of the drive motor 42 and the stator 80 of the water guide drive device 76 can be manufactured simultaneously from the same blank 111. The stator 80 of the water guide drive device 76 is designed to have a size which is smaller than or equal to the stator opening in the middle of the stator 50 of the drive motor 42, and this opening subsequently forms the stator 80 of the water guide drive device 76. Thereby, the stator 50 of the drive motor 42 and the stator 80 of the water guide drive device 76 can be made in the same process step.

[0161] Due to the fact that the pump device 19 and the water guide drive 76 always need to be paired when manufacturing the domestic dishwasher 1, a simplification of the manufacturing process and a reduction of the costs can be achieved. This can be applied analogously to the combination of the stator 50 of the drive motor 42 and the stator of the drain pump.

[0162] Thus, the stamping waste produced when manufacturing the stator 50 of the drive motor 42 can be used for manufacturing the stator of another electric machine, in this case the stator of the water guide drive 76, so that a material saving is achieved. Two stator stamping packs can be manufactured in one process step, so that manufacturing costs are saved. Only one stamping pack tool is required, so that investment costs can also be reduced. An advantageous effect of resource conservation in terms of material consumption is thus achieved.

[0163] Figure 15 A variant embodiment of the pump device 19 improved compared to the embodiment shown in Figure 3 is shown in a schematic cross-sectional view. Compared to the embodiment shown in Figure 3 the housing 35 of the pump device 19 in Figure 15 is provided with an integral housing outer part 367 which defines the liquid transport channel 121 which is almost rotationally symmetrical at least at the centre axis 20, outwardly, in particular excluding the fluid outlets 51 - 54. At least one tube heating body RH is provided in the liquid transport channel 121 instead of the tube heating element 40. The structure or design of the inventive pump device can thus be further simplified. The housing 35 of the pump device 19 can be composed of only two parts, the housing outer part 367 and the housing inner part 38, to meet the requirements. In addition, a cover part DE can be provided for closing the upper opening of the housing inner part 38. For the sake of simplicity, the cover part DE is only indicated in dotted line in Figure 15 . The stator 50 arranged between the first and the second accommodation 45, 48 of the housing inner part 38 can thus be reliably protected from moisture and / or washing liquid. The housing outer part 367 and the housing inner part 38 inserted or immersed therein can be mechanically connected, for example by means of a snap, a lock and / or a bayonet connection and / or another mechanical coupling. Due to the fact that the at least one tube heating body RH is arranged in the liquid transport channel 121 formed by the housing inner part 38 and the housing outer part 367, a better heat transfer between the tube heating body RH and the washing liquid F transported upwards from below by the impeller 41 or pump wheel of the pump device 19 through the liquid transport channel 121 is achieved.

[0164] In particular, the second accommodation 48 constitutes at least one sub-section of the inner limiting wall of the liquid transport channel 121.

[0165] The tube heating body RH is preferably arranged in the liquid transport channel 121 along its flow path behind the impeller 41 of the pump device 19, in particular at least almost rotationally symmetrical to the center axis 20, preferably at least almost concentrically to the second receiving portion 48. Preferably, the liquid transport channel 121 is arranged symmetrically to the center axis or central axis, preferably of an annular cylindrical structure, such that in the respective channel cross section of the liquid transport channel 121, at least approximately equal gap widths are present between the tube heating body RH and the inner delimiting wall of the liquid transport channel 121 formed by the housing inner part 38, and between the tube heating body RH and the outer delimiting wall of the liquid transport channel 121 formed by the housing outer part 367, in order to ensure a smooth flow of the washing liquid F through there. Thus, the tube heating body RH can be flushed by the washing liquid F conveyed therethrough more uniformly, which facilitates the heat transfer from the tube heating body to the washing liquid flowing over its surface.

[0166] In particular, it is often sufficient and / or advantageous when the tube heating body RH is arranged in the liquid transport channel 121 in only one turn or in a sub-section of one turn, and surrounds the center axis 20, preferably the second receiving portion 48 of the housing inner part 38. Thereby, the influence of the tube heating body RH on the flow conditions in the liquid transport channel 121 can be minimized or substantially avoided. It is particularly advantageous in this respect and / or in this configuration if the coil or coil portion of the tube heating body RH is arranged at least approximately horizontally or in a plane perpendicular to the center axis 20. However, it is also possible to arrange the tube heating body RH in the liquid transport channel 121 in more than one turn around the center axis 20, for example when a higher heat transfer to the washing liquid is desired.

[0167] Although the present application has been described in connection with specific embodiments thereof, various modifications will be apparent to those skilled in the art and are intended to be within the scope of the present application.

[0168] Used reference signs

[0169] 1 domestic dishwasher

[0170] 2 washing container

[0171] 3 door

[0172] 4 washing space

[0173] 5 pivot axis

[0174] 6 loading opening

[0175] 7 bottom

[0176] 8 top plate

[0177] 9 rear wall

[0178] 10 side wall

[0179] 11 side wall

[0180] 12 washing object accommodating part

[0181] 13 washing object accommodating part

[0182] 14 washing object accommodating part

[0183] 15 base support

[0184] 16 pump pit

[0185] 17 drain

[0186] 18 filtration system

[0187] 19 pump device

[0188] 20 central axis

[0189] 21 pump

[0190] 22 suction pipe

[0191] 23 water guide

[0192] 24 spraying device

[0193] 25 spraying device

[0194] 26 spraying device

[0195] 27 pivot axis

[0196] 28 pivot axis

[0197] 29 pivot axis

[0198] 30 supply pipe

[0199] 31 supply pipe

[0200] 32 supply pipe

[0201] 33 hydraulic circuit

[0202] 34 regulating and control device

[0203] 35 housing

[0204] 36 lower housing part

[0205] 37 upper housing part

[0206] 38 inner housing part

[0207] 39 pump inlet

[0208] 40 pipe heating element

[0209] 41 impeller

[0210] 42 drive motor

[0211] 43 drive shaft

[0212] 44 rotor

[0213] 45 housing

[0214] 46 accommodation space

[0215] 47 closure device

[0216] 48 housing

[0217] 49 accommodation space

[0218] 50 stator

[0219] 51 fluid outlet

[0220] 52 fluid outlet

[0221] 53 fluid outlet

[0222] 54 fluid outlet

[0223] 55 closure plate

[0224] 56 connecting section

[0225] 57 water guide disc

[0226] 58 circular ring disc

[0227] 59 drive ring

[0228] 60 through hole

[0229] 61 through hole

[0230] 62 through hole

[0231] 63 through hole

[0232] 64 guide section

[0233] 65 guide section

[0234] 66 guide section

[0235] 67 recess

[0236] 68 recess

[0237] 69 recess

[0238] 70 base portion

[0239] 71 tooth portion

[0240] 72 end face

[0241] 73 entraining element

[0242] 74 entraining element

[0243] 75 entraining element

[0244] 76 water guide drive device

[0245] 77 housing part

[0246] 78 housing part

[0247] 79 interior space

[0248] 80 stator

[0249] 81 rotor

[0250] 82 drive shaft

[0251] 83 worm

[0252] 84 annular groove

[0253] 85 guide plate

[0254] 86 guide plate

[0255] 87 guide plate

[0256] 88 guide plate

[0257] 89 drain

[0258] 90 fluid chamber

[0259] 91 connecting section

[0260] 92 diffusion chamber

[0261] 93 transition section

[0262] 94 radius

[0263] 95 bevel

[0264] 96 radius

[0265] 97 radius

[0266] 98 radius

[0267] 99 radius

[0268] 100 sealing device

[0269] 101 receptacle

[0270] 102 annular groove

[0271] 103 leg

[0272] 104 leg

[0273] 105 deflection section

[0274] 106 arrow

[0275] 107 bearing surface

[0276] 108 radius

[0277] 109 outer surface

[0278] 110 arrow

[0279] 111 blank

[0280] 112 arrangement

[0281] 113 stator lamination

[0282] 114 stator lamination

[0283] 115 annular segment

[0284] 116 root segment

[0285] 117 annular segment

[0286] 118 root segment

[0287] 367 one-piece housing outer part

[0288] A pull-out direction

[0289] AX axial

[0290] da outer diameter

[0291] DE cover part

[0292] di inner diameter

[0293] E insertion direction

[0294] F wash liquor and / or fresh water

[0295] g gravitational direction

[0296] G washware

[0297] R radial direction

[0298] RH tube heater

[0299] S flow direction

Claims

1. A domestic dishwasher (1) having a washing tub (2) for accommodating washware (G), a hydraulic circuit (33) for circulating a washing liquid and / or fresh water (F) in the washing tub (2), and a pump device (19) for applying the washing liquid and / or fresh water (F) to the hydraulic circuit (33), wherein The pump device (19) has a water guide (23) integrated in a housing (35) of the pump device (19), which water guide serves to selectively distribute the washing and / or fresh water (F) to a plurality of fluid outlets (51, 52, 53, 54) of the pump device (19), wherein the water guide (23) has a water guide disc (57), wherein the water guide disc (57) comprises a ring disc (58) and a drive ring (59) for driving the ring disc (58), and wherein the ring disc (58) and the drive ring (59) are two separate components from one another.

2. The domestic dishwasher according to claim 1, characterized in that The pump device (19) has a center axis (20) which is oriented in the direction of gravity (g).

3. The domestic dishwasher according to claim 2, characterized in that The ring disc (58) and the drive ring (59) are connected to one another in a form-fit manner.

4. The domestic dishwasher according to claim 3, characterized in that The ring disc (58) has recesses (67, 68, 69), wherein the drive ring (59) has drive elements (73, 74, 75) which correspond to the recesses (67, 68, 69), and wherein the drive elements (73, 74, 75) engage into the recesses (67, 68, 69) in a form-fit manner.

5. The domestic dishwasher according to claim 4, characterized in that The recesses (67, 68, 69) and the drive elements (73, 74, 75) are arranged in a non-uniform distribution around the center axis (20), or wherein at least one of the recesses (67, 68, 69) and at least one of the drive elements (73, 74, 75) have a different width than the other recesses (67, 68, 69) and the other drive elements (73, 74, 75).

6. The domestic dishwasher according to any one of claims 3 to 5, characterized in that The ring disc (58) is designed to float on the washing and / or fresh water (F) during operation of the pump device (19), wherein the form-fit connection between the ring disc (58) and the drive ring (59) is designed such that the form-fit connection between the ring disc (58) and the drive ring (59) continues to be maintained when the ring disc (58) is floating.

7. The domestic dishwasher according to any one of claims 2 to 6, characterized in that The ring disc (58) has through-holes (61, 62, 63) for selectively opening individual, multiple or all of the fluid outlets (51, 52, 53).

8. The domestic dishwasher according to any one of claims 2 to 7, characterized in that The drive ring (59) has a toothing (71) on the outside which at least section-wise surrounds the center axis (20).

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

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

11. The domestic dishwasher according to any one of claims 1 to 10, characterized in that The water guide disc (57) has a centrally located through-hole (60) through which a portion of the housing (35) is guided.

12. The domestic dishwasher according to claim 11, characterized in that The water guide disc (58) is supported on the inside on the through-hole (60) by means of guide sections (64, 65, 66) which are integrally formed on the housing (35).

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

14. The domestic dishwasher according to claim 13, characterized in that The housing (35) has a water discharge (89) directed towards the direction of the center axis (20), which is in fluid connection with the annular groove (84).

15. The domestic dishwasher according to claim 13 or 14, characterized in that The drive ring (58) is rotatably supported on a guide plate (85, 86, 87, 88) which projects radially into the annular groove (84).

16. Pump device (19) for a domestic appliance for the water conduction, in particular for a domestic dishwasher according to at least one of the preceding claims, wherein The pump device (19) has a water distributor (23) integrated in the housing (35) of the pump device (19) for selectively distributing water (F) to a plurality of fluid outlets (51, 52, 53, 54) of the pump device (19), wherein the water distributor (23) has a water distributor disc (57), wherein the water distributor disc (57) has a circular ring disc (58) and a drive ring (59) for driving the circular ring disc (58), and wherein the circular ring disc (58) and the drive ring (59) are two separate components from each other.

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