DE102023203181A1 - household dishwasher - Google Patents

Abstract

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

Description

The present invention relates to a household dishwasher.

A dishwasher has a washing container in which items to be washed can be accommodated. Spray zones can be provided in the washing container to apply washing liquor and/or fresh water to the items to be washed. The spray zones can, for example, be designed as spray arms that are rotatably mounted in or on the washing container. The dishwasher has a circulating pump to apply washing liquor and/or fresh water to the spray zones. The washing liquor and/or fresh water is distributed to the spray zones with the aid of a so-called water switch. The aforementioned circulating pump sucks in the washing liquor and/or fresh water from a pump sump of the dishwasher, with a motor shaft with an impeller of the circulating pump usually being arranged horizontally and pumping the washing liquor and/or fresh water into the water switch or directly to the spray zones via a pump housing, into which a heater can also be integrated.

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

Accordingly, a household dishwasher is proposed with a washing container for holding wash items, a hydraulic circuit for circulating washing liquor and/or fresh water in the washing container and a pumping device for supplying the hydraulic circuit with the washing liquor and/or the fresh water. The pumping device has a water switch integrated in a housing of the pumping device for selectively distributing the washing liquor and/or the fresh water to several fluid outlets of the pumping device, wherein the water switch has a water switch disk, wherein the water switch disk has an annular disk and a drive ring for driving the annular disks, and wherein the annular disk and the drive ring are two separate components.

Because the circular ring disk and the drive ring are two separate components, it is easier to manufacture the water diverter disk. This reduces the costs of manufacturing the water diverter disk. It is also possible to mount the circular ring disk on the drive ring in a floating manner, so that the circular ring disk can float on the rinsing solution and/or the fresh water when the pump device is in operation, for example to seal selected fluid outlets in a fluid-tight manner. The floating mounting of the circular ring disk means that it can be decoupled from the bearing play of a water diverter drive. The complexity of the water diverter disks is reduced. The water diverter disk is also easier to repair, since the circular ring disk or the drive ring can be replaced individually, for example.

The washing container is preferably cuboid-shaped. The washing container can be closed using a door that is pivotably attached to the washing container. The washing container can be provided with several washware receptacles, for example a lower basket, an upper basket and a cutlery drawer. The washware can be accommodated in the washware receptacles, which are then subjected to washing liquor and/or fresh water using the hydraulic circuit. “Subjecting” in this case can include spraying or wetting the washware. In this case, “washing liquor” is understood to mean water that has been treated with a cleaning agent and/or dirt particles that have been detached from the washware.

The hydraulic circuit can have several spray devices, for example in the form of spray arms and/or intensive spray zones, which are arranged inside the rinsing tank. The spray devices can be rotatably mounted in the rinsing tank. The spray devices are connected to the fluid outlets of the pump device by means of supply lines. The pump device can be part of the hydraulic circuit. However, this is not absolutely necessary.

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

The pump device is designed to circulate washing liquid and/or fresh water in the washing container or in the hydraulic circuit. Furthermore, the pump device can also be designed to introduce heat into the washing liquid and/or the fresh water. The pump device can be attached to a pump sump of the household dishwasher. The pump device can be positioned completely or at least partially below the pump sump.

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

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

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

The fact that the water switch is "integrated" into the housing means in particular that the water switch is at least partially placed inside the housing. However, it is possible that the housing is at least partially part of the water switch. For example, the previously mentioned inner housing part and the upper housing part are at least partially part of the water switch. The water switch is therefore not spatially separated from the pumping device.

With the help of the water switch, it is possible to distribute the rinsing solution and/or the fresh water to the different fluid outlets. Selected fluid outlets can be blocked or released. The water switch disc, in particular the circular disc, which is rotatably mounted in the housing is provided for this purpose. As previously mentioned, the fluid outlets are in fluid connection with the spray devices. With the help of the water switch, it is therefore possible to supply individual spray devices with rinsing solution and/or fresh water. It is also possible to supply all spray devices with rinsing solution and/or fresh water at the same time.

The water diverter disc is in particular made up of two parts and comprises the circular ring disc and the drive ring. The fact that the circular ring disc and the drive ring are two "separate" components means in this case that the circular ring disc and the drive ring can be manufactured separately and connected to form the water diverter disc. However, 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 each other as often as desired. The wording "separate from each other" therefore does not exclude the possibility that the circular ring disc and the drive ring can be detachably connected to each other.

According to one embodiment, the pumping device has a central axis oriented along a direction of gravity.

According to a further embodiment, the circular ring disc and the drive ring are positively connected to one another.

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

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

The number of recesses and the number of drivers is arbitrary. Particularly preferably, three recesses and three drivers are provided. The number of recesses preferably corresponds to the number of drivers. The recesses are provided in particular on an outer circumference of the circular ring disk. The recesses can be rectangular. With the help of the drivers and the recesses, a torque can be transmitted from the drive ring to the circular ring disk.

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

This creates a coding when the circular ring disk and the drive ring are assembled, which prevents the water diverter disk from being assembled incorrectly (Poka Yoke). Alternatively, the recesses and the drivers can also be evenly distributed around the central axis. In this case, the coding can be achieved by having at least one of the recesses and at least one of the drivers have a width that is different from the other recesses and the other drivers. For example, the at least one recess and the at least one driver are wider than the remaining recesses and the remaining drivers.

According to a further embodiment, the annular disc is designed to float on the rinsing liquor and/or the fresh water during operation of the pump device, wherein the positive connection between the annular disc and the drive ring is designed such that the positive connection between the annular disc and the drive ring is maintained when the annular disc floats.

As the circular ring disc floats up, it can be pressed against the inside of a cover plate on the inside of the housing in order to reliably seal fluid outlets that need to be closed. In particular, the circular ring disc is lifted off one end of the drive ring when it floats up, so that a gap filled with rinsing solution and/or fresh water is created between the end and the circular ring disc. This gap is bridged in particular by the drivers, so that they can transfer torque to the circular ring disc even when it is floating up.

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

The fluid outlets are preferably tubular. The fluid outlets can be part of the water switch. The fluid outlets can have a circular or an oval or elliptical cross-section. The fact that the fluid outlets are "oriented" along the central axis means in particular that the fluid outlets extend out of the housing along the central axis or along an axial direction of the pump device. The axial direction is oriented parallel to the central axis or corresponds to it. A radial direction of the pump device, on the other hand, is arranged in particular perpendicular to the central axis or perpendicular to the axial direction. The pump device preferably has no fluid outlets that are oriented perpendicular to the central axis and thus along the radial direction. All or all of the fluid outlets of the pump device run along the central axis or along the axial direction.

According to a further embodiment, the annular disc has openings for selectively releasing individual, several or all fluid outlets.

The openings can be circular. However, the openings can also have a slot-shaped geometry. The number of openings is arbitrary. In particular, the number of openings corresponds to the number of fluid outlets.

According to a further embodiment, the drive ring has a toothing on the outside that runs at least partially around the central axis.

The drive ring or the water diverter discs are therefore not driven centrally, but rather on the outside or around the circumference. The gearing can be helical gearing. The gearing can in particular be globoid gearing. The gearing can run completely around the central axis. However, this is not absolutely necessary. Only partial gearing can also be provided.

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

In the present case, “perpendicular” means an angle of 90° ± 10°, preferably 90° ± 5°, °, more preferably 90° ± 3°, more preferably 90° ± 1°, more preferably exactly 90°. The water switch drive is an electric motor. The water switch drive is preferably a so-called wet rotor. The water switch drive preferably comprises a first housing part which is molded onto the upper housing part of the housing of the pump device. A second housing part is positively connected to the first housing part, in particular latched or snapped, wherein the second housing part engages the first housing part. closes. The housing parts enclose an interior space which is filled with rinsing solution and/or fresh water when the pump device is in operation. The water switch drive also comprises a stator attached to the outside of the second housing part and a rotatable rotor which is arranged within the interior space. The rotor is connected in a rotationally fixed manner to the drive shaft, which in turn is rotatably mounted on the two housing parts.

According to a further embodiment, the water switch drive has a worm attached to the drive shaft, which engages in the gearing.

The gearing and the worm preferably have globoid gearing. The use of a worm drive to drive the water diverter disk causes the worm to remove dirt from the gearing of the drive ring. This results in increased operational reliability.

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

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

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

In particular, the circular ring disk is mounted on the inside of the opening with the help of the guide sections. The number of guide sections is arbitrary. However, three guide sections are particularly preferably provided, which can be evenly distributed around the central axis. The guide sections are in particular part of the inner housing. Between the guide sections, rinsing liquid and/or fresh water can flow radially inwards from the water diverter disk in the direction of the central axis. However, instead of the spaced-apart guide sections, a continuous ring-shaped guide section can also be provided.

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

Preferably, the ring groove is formed on the upper part of the housing. The ring groove is filled with rinsing solution and/or fresh water. The drive ring is located in the ring groove. The ring groove runs completely around the central axis of the pump device.

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

Exactly one drainage opening can be provided. However, several drainage openings can also be provided. With the help of the drainage opening, rinsing liquid and/or fresh water can flow out of the annular groove. The fact that the drainage groove is "in fluid communication" with the annular groove means in particular that the rinsing liquid and/or fresh water can flow out of the annular groove through the drainage groove in the direction of the central axis.

According to a further embodiment, the drive ring is rotatably mounted on guide webs projecting radially into the ring groove.

This allows reduced friction to be achieved when the drive ring is rotated. The number of guide webs is arbitrary. Preferably, however, at least three guide webs are provided. However, four guide webs or more than four guide webs can also be provided. The guide webs protrude into the annular groove when viewed along the radial direction.

Other possible implementations of the household dishwasher also include combinations of features or embodiments described above or below with regard to the exemplary embodiments that are not explicitly mentioned. The person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the household dishwasher.

• 1 zeigt eine schematische perspektivische Ansicht einer Ausführungsform einer Haushalts-Geschirrspülmaschine;
• 2 zeigt schematische Schnittansicht der Haushalts-Geschirrspülmaschine gemäß 1;
• 3 zeigt eine schematische Schnittansicht einer Ausführungsform einer Pumpvorrichtung für die Haushalts-Geschirrspülmaschine gemäß 1;
• 4 zeigt eine schematische Aufsicht der Pumpvorrichtung gemäß 3;
• 5 zeigt eine schematische Aufsicht einer Ausführungsform einer Wasserweichenscheibe für die Pumpvorrichtung gemäß 3;
• 6 zeigt eine schematische Schnittansicht der Wasserweichenscheibe gemäß 5;
• 7 zeigt eine schematische perspektivische Explosionsansicht der Wasserweichenscheibe gemäß 5;
• 8 zeigt eine schematische perspektivische Ansicht einer Ausführungsform eines Antriebsrings für die Wasserweichenscheibe gemäß 5;
• 9 zeigt eine schematische Schnittansicht einer Ausführungsform einer Wasserweiche für die Pumpvorrichtung gemäß 3;
• 10 zeigt eine schematische Schnittansicht einer Ausführungsform eines Fluidabgangs für die Pumpvorrichtung gemäß 3;
• 11 zeigt eine schematische Aufsicht einer Ausführungsform einer Dichteinrichtung für die Pumpvorrichtung gemäß 3;
• 12 zeigt eine schematische Schnittansicht der Dichteinrichtung gemäß 11;
• 13 zeigt eine schematische Aufsicht einer Ausführungsform eines Rohlings zum Herstellen eines Stators eines Antriebsmotors sowie eines Stators eines Wasserweichenantriebs für die Pumpvorrichtung gemäß 3; und
• 14 zeigt eine Ausführungsform einer Anordnung aus dem Rohling gemäß 13.

Further advantageous embodiments and aspects of the household dishwasher are the subject of the subclaims and the embodiments of the household dishwasher described below. The household dishwasher is explained in more detail below using preferred embodiments with reference to the attached figures.

• 1 shows a schematic perspective view of an embodiment of a household dishwasher;
• 2 shows a schematic sectional view of the household dishwasher according to 1 ;
• 3 shows a schematic sectional view of an embodiment of a pumping device for the household dishwasher according to 1 ;
• 4 shows a schematic plan view of the pumping device according to 3 ;
• 5 shows a schematic plan view of an embodiment of a water diverter disc for the pumping device according to 3 ;
• 6 shows a schematic sectional view of the water diverter disc according to 5 ;
• 7 shows a schematic perspective exploded view of the water diverter disc according to 5 ;
• 8 shows a schematic perspective view of an embodiment of a drive ring for the water diverter disc according to 5 ;
• 9 shows a schematic sectional view of an embodiment of a water switch for the pumping device according to 3 ;
• 10 shows a schematic sectional view of an embodiment of a fluid outlet for the pumping device according to 3 ;
• 11 shows a schematic plan view of an embodiment of a sealing device for the pumping device according to 3 ;
• 12 shows a schematic sectional view of the sealing device according to 11 ;
• 13 shows a schematic plan view of an embodiment of a blank for producing a stator of a drive motor and a stator of a water switch drive for the pump device according to 3 ; and
• 14 shows an embodiment of an arrangement from the blank according to 13 .

In the figures, identical or functionally equivalent elements have been given the same reference symbols unless otherwise stated.

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

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

The household dishwasher 1 further comprises at least one dishware holder 12 to 14. Preferably, several, for example three, dishware holders 12 to 14 can be provided, wherein the dishware holder 12 can be a lower dishware holder or a lower basket, the dishware holder 13 can be an upper dishware holder or an upper basket and the dishware holder 14 can be a cutlery drawer. As the 1 As can be seen further, the dishware holders 12 to 14 are arranged one above the other in the Washing container 2 is arranged. Each washware holder 12 to 14 can be moved either into or out of the washing container 2. In particular, each washware holder 12 to 14 can be pushed or moved into the washing container 2 in an insertion direction E and pulled or moved out of the washing container 2 in an extension direction A opposite to the insertion direction E.

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

A pump sump 16 is provided on the bottom 7. The pump sump 16 is pot-shaped and extends in the orientation of the 2 downwards out of the base 7. The pump sump 16 can be a plastic component, in particular a plastic injection-molded component. A tubular outlet 17 opens out of the pump sump 16. The pump sump 16 is covered by a sieve system 18. The sieve system 18 can comprise a coarse filter and a fine filter.

A pumping device 19 is connected to the outlet 17. The pumping device 19 is a circulation pump, in particular a heating pump, and can therefore also be referred to as such. The pumping device 19 is particularly preferably a compact heating pump and can therefore also be referred to as such. The pumping device 19 is designed to circulate washing liquor and/or fresh water F. Furthermore, the pumping device 19 is also designed to introduce heat into the washing liquor and/or the fresh water F. The pumping device 19 can be attached to the pump sump 16. The pumping device 19 is preferably arranged completely or at least partially below the pump sump 16.

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

In addition to the pump 21, the pump device 19 has a water switch 23 integrated into the pump device 19. With the help of the water switch 23, it is possible to distribute the rinsing liquid and/or fresh water F delivered by the pump device 19 optionally to different spray devices 24, 25, 26 provided in the rinsing container 2. With the help of the water switch 23, the spray devices 24, 25, 26 can optionally be supplied with rinsing liquid and/or fresh water F or not.

The spray devices 24, 25 can be spray arms, whereas the spray device 26 can be a roof gyroscope. In addition, switchable intensive spray zones or a screen cleaning nozzle (not shown) can be provided. For example, the spray device 24 is mounted below the washware holder 12 so as to be rotatable about an axis of rotation 27 on the floor 7, on the pump sump 16 or on the pump device 19. The spray device 24 has spray nozzles which spray the wash liquor and/or the fresh water F in the orientation of the 2 Spray upwards into the dishwashing utensil holder 12.

The spray device 25 can be mounted on the washware holder 13 so as to be rotatable about a rotation axis 28. The spray device 25 also has spray nozzles which are designed to spray the wash liquor and/or the fresh water F in the orientation of the 2 downwards and/or upwards. The spray device 26 can be mounted on the ceiling 8 so that it can rotate about a rotation axis 29. The spray device 26 acts on the washware holder 14 in the orientation of the 2 from above with rinsing solution and/or fresh water F.

The spray device 24 is in fluid connection with the pump device 19, in particular with the water switch 23, by means of a supply line 30. The pump device 19 can supply the spray device 24 with rinsing liquid and/or fresh water F via the supply line 30.

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

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

Each spray device 24, 25, 26 can be assigned its own supply line 30, 31, 32. Alternatively, all spray devices 24, 25, 26 can have a common supply line that branches off. In particular, the supply lines 30, 31, 32 are connected to a common component, in particular from a common plastic injection molded component. The supply lines 30, 31, 32 are guided along the rear wall 9 from the floor 7 in the direction of the ceiling 8. The supply lines 30, 31, 32 or at least some of the supply lines 30, 31, 32 can be guided through the sieve system 18.

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

The domestic dishwasher 1 further comprises a regulating and control device 34. With the aid of the regulating and control device 34, for example, different washing programs of the domestic dishwasher 1 can be carried out. For this purpose, washing programs can be stored or saved in the regulating and control device 34. The regulating and control device 34 is preferably arranged outside the washing container 2.

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

The pump device 19 can be controlled with the aid of the regulating and control device 34. For example, the pump 21 can be switched on and off and/or its speed can be changed with the aid of the regulating and control device 34. The regulating and control device 34 can receive and evaluate information from the pump device 19, such as the speed of the pump 21 and/or a motor current of the pump 21. Furthermore, the regulating and control device 34 can also control the water switch 23 in order to selectively switch the spray devices 24, 25, 26 on or off.

The washing container 2 contains items G to be cleaned. The items G can include, for example, glasses, plates, pots, bowls, cutlery or the like. In particular, the items G are arranged in the 2 not shown washware holders 12, 13, 14. With the help of the spray devices 24, 25, 26, the washware G can be exposed to washing liquid and/or fresh water F.

3 shows a schematic sectional view of an embodiment of a pumping device 19 as mentioned above. The pumping device 19 is assigned an axial direction AX, which differs in the orientation of the 3 from bottom to top. The axial direction AX coincides with the central axis 20 or is oriented parallel to it. Furthermore, the pump device 19 is assigned a radial direction R. The radial direction R is oriented perpendicular to the central axis 20 and away from it. The axial direction AX and the radial direction R are thus oriented perpendicular to one another.

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

The pump device 19 has a housing 35 with a housing lower part 36, a housing upper part 37 and a housing inner part 38. The housing lower part 36 has a pump inlet 39 to which the intake nozzle 22 is connected. For example, the intake nozzle 22 is plugged onto the pump inlet 39 and sealed off from it with the aid of a sealing element, for example in the form of an O-ring. The housing 35 is constructed essentially rotationally symmetrical to the central axis 20.

A tubular heating element 40 is placed between the lower housing part 36 and the upper housing part 37. The tubular heating element 40 is preferably a thick-film heating element. The tubular heating element 40 is sealed with respect to the lower housing part 36 and the upper housing part 37 using sealing elements, for example in the form of O-rings. The tubular heating element 40 is tubular or hollow-cylindrical. The tubular heating element 40 is constructed rotationally symmetrically to the central axis 20. The tubular heating element 40 is thus held between the lower housing part 36 and the upper housing part 37. When the pump device 19 is in operation, the rinsing liquid and/or the fresh water F flows along the inside of the tubular heating element 40.

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

The housing lower part 36 accommodates an impeller 41, which is arranged downstream of the pump inlet 39. The impeller 41 is driven by a drive motor 42. The drive motor 42 is an electric motor. The impeller 41 can also be referred to as an impeller. The drive motor 42 comprises a drive shaft 43 which is connected in a rotationally fixed manner to the impeller 41 and which rotates about the central axis 20 when the pump device 19 is in operation. In addition to the impeller 41, a rotor 44 of the drive motor 42 is connected in a rotationally fixed manner to the drive shaft 43.

The rotor 44 is mounted in a pot-shaped first receiving section 45 of the housing inner part 38 so as to be rotatable about the central axis 20. The first receiving section 45 encloses a receiving space 46 in which the rotor 44 is accommodated. The receiving space 46 can be filled with rinsing liquid and/or fresh water F. The first receiving section 45 is oriented in the 3 downwards, i.e. in the direction of the impeller 41, with a closure 47. The drive shaft 43 is guided through the closure 47 and can be mounted on it.

In addition to the first receiving section 45, the housing inner part 38 comprises a second receiving section 48. The second receiving section 48 is also pot-shaped. In contrast to the first receiving section 45, the second receiving section 48 is in the orientation of the 3 however, it is open at the top rather than the bottom. The first receiving section 45 is arranged within the second receiving section 48. The second receiving section 48 thus has a larger diameter than the first receiving section 45.

An annular receiving space 49 is provided between the first receiving section 45 and the second receiving section 48. A stator 50 of the drive motor 42 is arranged in the receiving space 49. The stator 50 can be glued to the first receiving section 45 and/or the second receiving section 48.

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

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

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

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

The fluid outlets 51, 52, 53, 54 extend out of a cover plate 55 of the housing inner part 38, which closes off the housing upper part 37 at the front. A tubular or hollow cylindrical connecting section 56 runs around the cover plate 55, with the aid of which the housing inner part 38 is connected to the housing upper part 37.

Now returning to the 2 Between the housing inner part 38, in particular the end plate 55, and the housing upper part 37, a water diverter disk 57 is arranged which can be rotated about the central axis 20 and which can also be seen in a plan view in the 5 shown. The 6 shows a schematic sectional view of the water diverter disc 57. The 7 shows a schematic perspective exploded view of the water diverter disc 57. The water diverter disc 57 is in two parts and has a circular ring disc 58 and a drive ring 59, which is in the 8 in one separate schematic perspective view.

The water diverter disk 57 is part of the water diverter 23. The water diverter disk 57 is constructed rotationally symmetrically to the central axis 20. The water diverter disk 57 has a central opening 60. The opening 60 is provided in particular on the annular circular disk 58. The opening 60 is preferably circular. Furthermore, the water diverter disk 57 has several openings 61, 62, 63 breaking through the circular disk 58, with which the fluid outlets 51, 52, 53, 54 can be optionally blocked or released by rotating the water diverter disk 57.

The openings 61, 62, 63 can be circular. The openings 61, 62, 63 can be slotted. Using the slotted geometry, it is possible to release several of the fluid outlets 51, 52, 53, 54 at the same time. The number of openings 61, 62, 63 can correspond to the number of fluid outlets 51, 52, 53. However, this is not absolutely necessary. Using the water diverter disk 57, in particular using the circular ring disk 58, the fluid outlets 51, 52, 53, 54 can be combined with one another as desired. For example, it is possible to release the fluid outlets 51, 52 and block the fluid outlets 53, 54.

The water diverter disk 57, in particular the circular ring disk 58, is guided on the inside of its opening 60 with the aid of guide sections 64, 65, 66 such that the water diverter disk 57 is mounted so as to be rotatable about the central axis 20. The number of guide sections 64, 65, 66 is arbitrary. However, it is particularly preferred to provide three guide sections 64, 65, 66, which are evenly distributed around the central axis 20. The guide sections 64, 65, 66 are in particular part of the inner housing part 38. Between the guide sections 64, 65, 66, rinsing liquid and/or fresh water F can flow radially inwards from the water diverter disk 57 in the direction of the central axis 20. Instead of the spaced-apart guide sections 64, 65, 66, a continuous ring-shaped guide section (not shown) can also be provided. In this case, it has a drain opening oriented in the direction of the central axis 20.

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

The drive ring 59 has an annular base section 70. A circumferential toothing 71, in particular a helical toothing, is attached to the outside of the base section 70. From a 8 Drivers 73, 74, 75 extend out from the upwardly facing end face 72 of the base section 70. The drivers 73, 74, 75 are designed to engage in a form-fitting manner in the recesses 67, 68, 69 of the annular disk 58, so that the drive ring 59 is connected in a form-fitting manner to the annular disk 58. The drivers 73, 74, 75 are preferably arranged unevenly distributed around the central axis 20, so that when the annular disk 58 and the drive ring 59 are assembled, a coding is implemented that prevents incorrect assembly (Poka Yoke).

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

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

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

The water switch drive 76 has a first housing part 77 which is formed onto the upper housing part 37. A second housing part 78 is positively connected to the first housing part 77, in particular latched or snapped, wherein the second housing part 78 closes the first housing part 77. A sealing element, for example in the form of an O-ring, can be provided between the first housing part 77 and the second housing part 78. The housing parts 77, 78 enclose an interior space 79 which is filled with rinsing liquid and/or fresh water F when the pump device 19 is in operation.

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

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

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

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

The water switch drive 76 is designed as a wet rotor so that no losses are generated by moving seals during operation of the pump device 19. In addition, the worm 83 on the output shaft 82 offers the possibility of transmitting a maximum gear ratio and thus the maximum torque with the lowest possible electrical input power to the water switch disk 57 with just one gear stage. The gear ratio between the worm 83 and the drive ring 59 is preferably in the range of 1:50 to 1:250. A hard ferrite ring is preferably used as the material for the rotor 81. This means that corrosion protection is not necessary.

The advantages of this previously explained arrangement are a minimization of losses due to moving seals, no wear on seals over the service life of the pump device 19 and a dirt-tolerant gear, since the worm 83 clears dirt out of the toothing 71 of the drive ring 59 when it rotates. This offers a particular advantage over spur gearing. The worm 83 preferably has a globoid toothing.

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

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

By using the worm 83 and the gearing 71 of the drive ring 59, a self-locking mechanism can be achieved so that the water diverter disk 57 cannot rotate unintentionally. The high transmission ratio ensures that the water diverter disk 57 can always be rotated reliably, even when there is high friction between the drive ring 59 and the upper housing part 37.

The previously explained arrangement has a number of advantages. Advantageously, there is no need for a pressurized sealing point between the pump 21 and the water switch 23. This results in a reduced construction height and thus a smaller installation space requirement. It is possible to reduce the water requirement and the so-called round-run quantity. With the pump device 19, a circulation pump system with a higher degree of efficiency can be implemented. There are more possible positions and/or a combination of open and closed fluid outlets 51, 52, 53, 54. There is a uniform flow to the fluid outlets 51, 52, 53, 54. It is also possible to spatially separate the fluid outlets 51, 52, 53, 54.

The water diverter disk 57 is therefore designed in two parts within the pump device 19. The function of the circular ring disk 58 as a perforated disk is decoupled from the drive ring 59, which is used as a drive for the circular ring disk 58. This arrangement makes it possible to drive the drive ring 59 tangentially via the toothing 71 and thus to optimally design a bearing clearance between the drive ring 59 and the driving screw 83. In addition, the circular ring disk 58 can be mounted floating on the drive ring 59 so that it can float up from the drive ring 59 in the axial direction AX when water pressure is applied and can thus better seal closed fluid outlets 51, 52, 53, 54.

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

This advantageously allows a floating bearing of the circular disk 58. This results in as many starting combinations as possible with the openings 61, 62, 63 in the circular disk 58 on the same pitch circle. The floating bearing enables good sealing of unopened fluid outlets 51, 52, 53, 54. The two-part structure of the water diverter disk 57 makes it easier for the circular disk 58 to float. This reduces the risk of the circular disk 58 tilting and/or jamming.

The floating bearing of the circular ring disk 58 decouples it from the bearing play of the water switch drive 76. The complexity of different water switch disks 57 is shifted to a structurally simple part, namely the circular ring disk 58. This results in an exact bearing of the water switch drive 76 in order to achieve a more precise axis distance tolerance in the gear stage, since the drive ring 59 does not float or floats less and maintains its position in relation to the driving element in the form of the worm 83.

This results in a defined engagement of the screw 83 in the drive ring 59. The water switch 23 is easy to repair because if the drive ring 59 becomes worn, it can be replaced independently of the annular disk 58. Reduced 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 in wear. This results in a uniform flow of fluid onto the annular disk 58 from below and thus a lower risk of the annular disk 58 tipping over. Not several closure elements, but only a single closure element in the form of the annular disk 58 within the pump device 19 is required.

10 shows a sectional view of an embodiment of a fluid outlet 51 as mentioned above. All the following statements regarding the fluid outlet 51 are applicable to the fluid outlets 52, 53, 54. The fluid outlet 51 extends in the orientation of the 10 from the top of the end plate 55. The fluid outlet 51 has the geometry of an asymmetric funnel.

The fluid outlet 51 comprises a tubular connection section 91. The connection section 91 can be circular or oval or elliptical in cross section. An oval cross section has the advantage that installation space can be saved along the radial direction R, whereby a larger flow cross-section can be achieved with the same installation space along the radial direction R compared to a circular cross-section. One of the supply lines 30, 31, 32 is connected to the connection section 91.

Now returning to the 3 a diffuser chamber 92 is formed between the lower housing part 36, the tubular heating element 40, the upper housing part 37 and the second receiving section 48 of the inner housing part 38, which runs in a ring around the central axis 20. The diffuser chamber 92 extends from the pump inlet 39 in the direction of the water diverter disk 57. The diffuser chamber 92 is designed to be rotationally symmetrical to the central axis 20. In front of the water diverter disk 57, the diffuser chamber 92 widens and distributes the rinsing liquid and/or the fresh water F to the water diverter disk 57. The water diverter 23 or the water diverter disk 57 is integrated into the diffuser chamber 92. The fluid outlets 51, 52, 53, 54 open out of the diffuser chamber 92.

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

As the 10 shows, the connection section 91 is followed by a transition section 93, with the aid of which the tubular connection section 91 is connected to the end plate 55. The transition section 93 has an asymmetric funnel geometry as mentioned above. This geometry can also be referred to as shoe-shaped.

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

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

This asymmetrical geometry, which can also be referred to as a shoe geometry, simulates a small spiral housing for the fluid outlet 51. In addition, the radii 94, 96 of the fluid outlet 51 are continued with the help of radii 98, 99 at the openings 61, 62, 63 of the circular ring disk 58 of the water switch 23. Furthermore, the radius 94 is also attached to a side of the fluid outlet 51 facing away from the flow, so that rinsing liquid and/or fresh water F can also flow into the fluid outlet 51 opposite to the flow direction S. The preferably elliptical cross-sectional geometry of the fluid outlet 51 or the connection section 91 also enables an increase in the flow cross-section without increasing the diameter of the water switch disk 57 and/or the diameter of the pump device 19.

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

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

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

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

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

The sealing device 100 seals the tubular heating element 40 and fixes it in place and at the same time directs the rinsing solution and/or fresh water F emerging from the impeller 41 upwards in the direction of the tubular heating element 40 using the radius 108 or a bevel. No residues of rinsing solution and/or fresh water F form within the pump device 19. This can optimize the hydraulic efficiency of the pump device 19, avoid residues of the rinsing solution and/or fresh water F within the pump device 19 and reduce the amount of run-through, in particular reduce the dead volume, of the pump device 19.

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

The V-shaped receiving section 101 fixes and seals the tubular heating element 40 and at the same time gently guides the rinsing solution and/or the fresh water F emerging from the impeller 41 upwards to the tubular heating element 40 with the aid of the previously mentioned bevel or radius 108 on the fluid-facing side of the sealing device 100. In addition, the previously mentioned annular groove of the housing base 36 is thereby filled and no residues of the rinsing solution and/or the fresh water F form within the pump device 19.

The advantages of this previously explained arrangement are an optimization of the hydraulic efficiency of the pump device 19, the avoidance of a residual amount of rinsing liquid and/or fresh water F within the pump device 19, which leads to a more hygienic design, and a reduction in the round-trip amount of rinsing liquid and/or fresh water F and thus a reduction in dead volume.

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

Within the diffuser chamber 92, the rinsing liquid and/or the fresh water F flows along the flow direction S around the central axis 20. In the present case, the flow direction S is oriented counterclockwise. However, the flow direction S can also be oriented clockwise. The circular ring disk 58 of the water diverter disk 57 floats on the rinsing liquid and/or the fresh water F, whereby the circular ring disk 58 is lifted off the front side 72 of the drive ring 59 and pressed against the inside of the end plate 55.

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

When the pump device 19 is in operation, the regulating and control device 34 can control the water switch drive 76 to rotate the water switch disk 57 and thus optionally open and/or close individual or all fluid outlets 51, 52, 53, 54. This allows the spray devices 24, 25, 26 to be switched on or off separately. It is thus possible, for example, to specifically supply only the two spray devices 24, 25 with rinsing liquid and/or fresh water F and not the spray device 26.

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

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

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

In order to ensure that the pump device 19 runs completely empty, the drive motor 42 is aligned vertically with the impeller 41. This means that the central axis 20 runs parallel to the direction of gravity g. The fluid outlets 51, 52, 53, 54 are also arranged vertically. In order to ensure the lowest possible construction height, the water switch 23 is integrated into the pump device 19. The diffuser space 92 of the pump device 19 is preferably an annular gap that surrounds the drive motor 42 on one side and is delimited on the other side by the tubular heating element 40.

An exemplary distance between the drive motor 42 and the tubular heating element 40 or a gap width of the diffuser space 92 is between 3 mm and 12 mm. This arrangement also allows the waste heat of the drive motor 42 to be transported away by the rinsing liquid and/or the fresh water F. In addition, this arrangement ensures optimal ventilation of the pump device 19, since there are no air chambers in an upper area of the pump device 19, in particular in the area of the water switch 23.

This means that when the pump sump 16 is filled with rinsing liquid and/or fresh water F, the pump device 19 is filled with rinsing liquid and/or fresh water F in parallel, as with two communicating pipes, and no air chambers are formed, which is advantageous for the uninterrupted operation of the pump device 19. The fluid outlets 51, 52, 53, 54 of the water switch 23 to the spray devices 24, 25, 26 are located on a circular ring and can be optimally arranged there. At least some of the fluid outlets 51, 52, 53, 54 can have an oval rather than a circular flow cross-section.

During a pumping process using the pump device 19, the entire washing liquor and/or the fresh water F runs back into the pump sump 16. One effect is the improvement of the washing result. In particular, this leads to fewer stains on the items to be washed G. Complete venting is possible without any additional measures. The drive motor 42 can be cooled or cooled via the contact of the stator 50 with the diffuser chamber 92. Only the second receiving section 48, which delimits the diffuser chamber 92, is arranged between the stator 50 and the diffuser chamber 92. This results in a very compact design for the pump device 19 and thus corresponding space advantages.

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

The arrangement 112 is made from the blank 111. The blank 111 can be circular. However, the blank 111 can basically have any geometry. The arrangement 112 can be made with The stator 50 can be manufactured from the blank 111 using a stamping process. During the manufacture of the arrangement 112, the first stator lamination 113 and the second stator lamination 114 are manufactured simultaneously. The stator 50 is manufactured from a package of first stator laminations 113. Accordingly, the stator 80 is manufactured from a package of second stator laminations 114.

The first stator sheet 113 has a circumferential ring section 115 from which a plurality of foot sections 116 extend inward. At the foot sections 116, the first stator sheet 113 has an inner diameter di. The second stator sheet 114 also has a circumferential ring section 117 from which a plurality of foot sections 118 extend inward. The ring section 117 has an outer diameter da that is smaller than the inner diameter di, so that the second stator sheet 114 can be arranged within the first stator sheet 113.

It is thus possible to manufacture both the stator 50 of the drive motor 42 and the stator 80 of the water switch drive 76 from one and the same blank 111. The stator 80 of the water switch drive 76 is thus dimensioned such that it is smaller or the same size as a stator cutout in the middle of the stator 50 of the drive motor 42 and this then forms the stator 80 for the water switch drive 76. The stator 50 of the drive motor 42 and the stator 80 of the water switch drive 76 can thus be manufactured in one process step.

Since the pump device 19 and the water switch drive 76 are always required in pairs to manufacture the domestic dishwasher 1, this leads to simplified manufacture and also to a reduction in costs. This could be applied analogously to the combination of stator 50 of the drive motor 42 and a stator of a drain pump.

It is therefore possible to use punching waste that accrues during the manufacture of the stator 50 of the drive motor 42 to manufacture a stator of another motor, in this case the water switch drive 76, which leads to material savings. Two stator punch packages can be manufactured simultaneously in one process step, which leads to manufacturing cost savings. Only one punch package tool is required, which also reduces investment costs. This advantageously results in resource conservation in terms of material consumption.

Although the present invention has been described using exemplary embodiments, it can be modified in many ways.

Reference symbols used:

1

household dishwasher

2

rinsing container

3

door

4

dishwashing area

5

swivel axis

6

loading opening

7

Floor

8

Ceiling

9

back wall

10

side wall

11

side wall

12

dishwashing rack

13

dishwashing rack

14

dishwashing rack

15

base carrier

16

sump

17

Sequence

18

sieve system

19

pumping device

20

central axis

21

pump

22

intake manifold

23

water diverter

24

spray device

25

spray device

26

spray device

27

axis of rotation

28

axis of rotation

29

axis of rotation

30

supply line

31

supply line

32

supply line

33

hydraulic circuit

34

control and regulation device

35

Housing

36

housing base

37

upper case

38

housing interior

39

pump inlet

40

tubular heating element

41

impeller

42

drive motor

43

drive shaft

44

rotor

45

recording section

46

recording room

47

closure

48

recording section

49

recording room

50

stator

51

fluid leak

52

fluid leak

53

fluid leak

54

fluid leak

55

end plate

56

connecting section

57

water diverter disc

58

circular disk

59

drive ring

60

breakthrough

61

breakthrough

62

breakthrough

63

breakthrough

64

leadership section

65

leadership section

66

leadership section

67

recess

68

recess

69

recess

70

base section

71

gearing

72

front side

73

driver

74

driver

75

driver

76

water switch drive

77

housing part

78

housing part

79

interior

80

stator

81

rotor

82

drive shaft

83

Snail

84

ring groove

85

guide bridge

86

guide bridge

87

guide bridge

88

guide bridge

89

drainage opening

90

fluid space

91

connecting section

92

diffuser chamber

93

transition section

94

radius

95

slope

96

radius

97

radius

98

radius

99

radius

100

sealing device

101

recording section

102

ring groove

103

leg

104

leg

105

diversion section

106

Arrow

107

contact surface

108

radius

109

outer surface

110

Arrow

111

blank

112

arrangement

113

stator sheet

114

stator sheet

115

ring section

116

foot section

117

ring section

118

foot section

A

extension direction

AX

axial direction

there

outer diameter

di

inner diameter

E

insertion direction

F

rinsing solution and/or fresh water

G

direction of gravity

G

dishes

R

radial direction

S

flow direction

Claims (15)

Household dishwasher (1) with a washing container (2) for receiving wash items (G), a hydraulic circuit (33) for circulating washing liquor and/or fresh water (F) in the washing container (2), and a pumping device (19) for supplying the hydraulic circuit (33) with the washing liquor and/or the fresh water (F), wherein the pumping device (19) has a water switch (23) integrated in a housing (35) of the pumping device (19) for selectively distributing the washing liquor and/or the fresh water (F) to several fluid outlets (51, 52, 53, 54) of the pumping device (19), wherein the water switch (23) has a water switch disk (57), wherein the water switch disk (57) has an annular disk (58) and a drive ring (59) for driving the annular disk (58), and wherein the annular disk (58) and the drive ring (59) are two separate components. Household dishwasher after claim 1 , characterized in that the pumping device (19) has a central axis (20) which is oriented along a direction of gravity (g). Household dishwasher after claim 2 , characterized in that the annular disc (58) and the drive ring (59) are positively connected to one another. Household dishwasher after claim 3 , characterized in that the circular ring disc (58) has recesses (67, 68, 69), wherein the drive ring (59) has drivers (73, 74, 75) corresponding to the recesses (67, 68, 69), and wherein the drivers (73, 74, 75) engage in the recesses (67, 68, 69) in a form-fitting manner. Household dishwasher after claim 4 , characterized in that the recesses (67, 68, 69) and the drivers (73, 74, 75) are arranged unevenly distributed around the central axis (20), or wherein at least one of the recesses (67, 68, 69) and at least one of the drivers (73, 74, 75) has a width that differs from the other recesses (67, 68, 69) and the other drivers (73, 74, 75). Household dishwasher according to one of the Claims 3 - 5 , characterized in that the annular disc (58) is designed to float on the rinsing liquor and/or the fresh water (F) during operation of the pump device (19), wherein the positive connection between the annular disc (58) and the drive ring (59) is designed such that the positive connection between the annular disc (58) and the drive ring (59) is maintained when the annular disc (58) floats. Household dishwasher according to one of the Claims 2 - 6 , characterized in that the annular disc (58) has openings (61, 62, 63) for selectively releasing individual, several or all fluid outlets (51, 52, 53). Household dishwasher according to one of the Claims 2 - 7 , characterized in that the drive ring (59) has on the outside a toothing (71) which runs at least in sections around the central axis (20). Household dishwasher after claim 8 , characterized in that the water switch (23) has a water switch drive (76) for driving the drive ring (59), wherein a drive shaft (82) of the water switch drive (76) is oriented perpendicular to the central axis (20). Household dishwasher after claim 9 , characterized in that the water switch drive (76) has a worm (83) attached to the drive shaft (82) which engages in the toothing (71). Household dishwasher according to one of the Claims 1 - 10 , characterized in that the water diverter disc (57) has a central opening (60) through which a part of the housing (35) is passed. Household dishwasher after claim 11 , characterized in that the water diverter disc (58) is guided by means of guide sections formed on the housing (35) (64, 65, 66) is mounted on the inside of the opening (60). Household dishwasher according to one of the Claims 2 - 12 , characterized in that the drive ring (58) is received in an annular groove (84) provided in the housing (35). Household dishwasher after claim 13 , characterized in that the housing (35) has a drainage opening (89) pointing in the direction of the central axis (20) which is in fluid communication with the annular groove (84). Household dishwasher after claim 13 or 14 , characterized in that the drive ring (58) is rotatably mounted on guide webs (85, 86, 87, 88) projecting radially into the annular groove (84).

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