Domestic dishwasher

Abstract

The invention relates to a domestic dishwasher (1) comprising: a washing container (2); a pump sump (16) attached to the washing container (2); a plurality of spraying devices (28, 29, 30), which are arranged within the washing container (2), for applying washing liquor and / or fresh water (F) to items to be washed (39) that are accommodated in the washing container (2); a filter system (17) which covers at least some portions of the pump sump (16); and a heat pump (26) for conveying the washing liquor and / or the fresh water (F) from the pump sump (16) to the spraying devices (28, 29, 30); wherein the heat pump (26) comprises a heat pump housing (41) having a plurality of fluid outlets (59, 60, 61, 62) which are fluidically connected to the spraying devices (28, 29, 30); wherein a rotational axis (31) of exactly one spraying device (28) from among the spraying devices (28, 29, 30), in particular a lower, rotatably mounted spraying arm, passes through exactly one fluid outlet (59) from among the fluid outlets (59, 60, 61, 62); and wherein the rotational axis (31) passes through the filter system (17).

Description

[0001] household dishwasher

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

[0003] A dishwasher has a wash tub into which items are placed for washing. Spray devices, for example in the form of rotating spray arms, can be provided in the wash tub to spray the items with the treatment fluid, i.e., wash solution and / or fresh water. The spray devices are part of the dishwasher's hydraulic circuit. A pump sump is located on the underside of the wash tub, to which a heating pump, i.e., a circulation pump with an associated heater, preferably integrated into its pump housing, can be connected. This heating pump is also part of the hydraulic circuit. The heating pump supplies the wash solution and / or fresh water to the spray devices. Furthermore, the heating pump can introduce heat into the wash solution and / or fresh water. For this purpose, the heating pump has a heating element.

[0004] The pump sump can be covered by a filter system. Such a system consists of a flat screen covering the pump sump and a fine screen. The filter system removes contaminants from the cleaning solution or cleaning fluid. To distribute the cleaning solution and / or fresh water to the spray devices, a water diverter can be used, which is installed downstream of the heating pump. The water diverter includes several fluid outlets that are connected to the spray devices. These fluid outlets can be routed laterally past the filter system.

[0005] Against this background, one object of the present invention is to provide an improved household dishwasher.

[0006] Accordingly, a household dishwasher is proposed comprising a wash tank, a pump sump attached to the wash tank, several spray devices arranged within the wash tank for applying treatment fluid, in particular washing liquor and / or fresh water, a sieve system which covers the pump sump at least partially, and a heating pump for conveying the washing liquor and / or fresh water from the pump sump to the spray devices, wherein the heating pump has a heating pump housing with several fluid outlets which are in fluid communication with the spray devices, wherein an axis of rotation of exactly one spray device of the spray devices, in particular a lower rotatably mounted spray arm, passes through exactly one fluid outlet of the fluid outlets, and wherein the axis of rotation passes through the sieve system, in particular through its surface sieve.

[0007] Because the axis of rotation of the single spray direction runs through the single fluid outlet, it is possible to direct the flow to the single spray device. Specifically, the center point or central axis of the single fluid outlet is oriented approximately congruently with the central axis of the supply line to the single spray device. Thus, the single fluid outlet and the supply line of the single spray device are aligned with respect to their central axes. It can be particularly advantageous if the pipe wall section of the single fluid outlet also aligns with the inlet pipe wall section of the supply line to the single spray device. Flow losses due to deflection of the rinsing solution and / or the fresh water are thereby avoided or at least reduced.

[0008] The rinsing tank is preferably cuboid in shape. It ideally comprises a base, a top opposite the base, two opposing side walls, and a rear wall. A pivotable door is hinged to the rinsing tank opposite the rear wall. The pump sump is attached to the base of the rinsing tank. The pump sump can, for example, be a plastic component, particularly an injection-molded plastic component. Preferably, one or more of the spray devices, or even all of the spray devices, can be rotatably mounted within the rinsing tank.

[0009] There can be several or all of the spray devices, in particular rotating spray arms. It can be advantageous to have a lower spray device, in particular a lower basket spray arm, an upper spray device, in particular an upper basket spray arm, and a topmost spray device, in particular a rotating roof sprayer or a fixed roof sprayer. Furthermore, so-called intensive spray zones can also be provided within the wash tub. The aforementioned single spray device can also be referred to as the lower basket spray device, in particular the lower basket spray arm. In other words, the single spray device is the aforementioned lower spray device. Accordingly, the single fluid outlet can also be referred to as the lower basket outlet. In particular, the lower basket spray arm can be rotatably mounted. The upper basket spray arm can also be rotatably mounted.

[0010] The spray devices allow the items being washed in the washing container to be moistened with treatment fluid, in particular fresh water and / or washing solution. The items are arranged in several load carriers, which can be pulled out of and pushed into the washing container. These load carriers may include, in particular, a lower basket, an upper basket, and a cutlery drawer.

[0011] The heating pump has an impeller located within its housing for pumping the cleaning solution and / or fresh water from a fluid inlet of the housing to the fluid outlets. The impeller is rotatably mounted in the housing about a central axis. In particular, the central axis of the impeller can also be the central axis of the housing. The fluid inlet and outlets preferably extend along this central axis. During operation, the pump can thus allow the flow of cleaning solution and / or fresh water along the central axis in the pump's delivery direction to flow through the fluid inlet and outlet, respectively, along the pump's delivery direction.

[0012] The pump sump can be arranged, in particular, below a preferably circular opening in the bottom wall of the flushing tank, and its outer edge can be connected to a perimeter zone of the bottom wall of the flushing tank surrounding the opening, in particular the underside of the bottom wall.

[0013] The screening system preferably comprises a flat screen arranged above the heating pump. The flat screen can be designed in one piece or in multiple pieces. The central axis of the impeller, which can also form the central axis of the heating pump housing, preferably passes through the flat screen. The flat screen preferably covers the pump sump from above within the interior of the flushing tank. It thus forms, in particular, a partial surface of the bottom wall of the flushing tank. In addition to the flat screen, the screening system preferably comprises a fine screen or separating screen. The fine screen is expediently arranged within the pump sump. It can preferably form a partial surface or the entire surface of a partition, in particular one arranged at least approximately vertically, which is provided between a raw section and a fine section of a liquid collection section of the pump sump, preferably shaft-shaped and projecting downwards.The raw section is fluidically connected to a drain pump of the household dishwasher, particularly via a drain. This allows the pump to remove the treatment fluid, which may contain dirt particles such as food residues, from the raw or coarse dirt section of the pump sump at the end of a liquid-carrying partial wash cycle, such as the cleaning cycle of a dishwasher program. This treatment fluid is applied to the dishes during recirculation and may contain dirt particles detached from the dishes, such as food residue. The fine section is fluidically connected to the fluid inlet of the heating pump, particularly via a connecting channel running transversely to the central axis. The filter system allows contaminants to be filtered out of the wash water and / or the fresh water. The flat filter preferably has an approximately circular geometry, especially its outer contour.Correspondingly, the pump sump, viewed from above, can also have an approximately circular geometric shape, particularly its outer contour. The surface screen can advantageously be dimensioned such that it largely covers the pump sump from above, except for openings or penetrations for pump sump outlets connected to the fluid outlets of the heating pump, and / or except for one or more recesses, such as for sections of supply lines running along the bottom of the flushing tank towards the rear wall of the flushing tank to other spray devices (besides the single spray device). The pump sump can, in particular, be arranged and designed below a preferably circular opening in the bottom wall of the flushing tank such that the surface screen is largely flush with the outer edge of the pump sump on its upper surface.the perforation opening provided in the bottom of the wash tank can accommodate the surrounding edge zone of the bottom wall of the wash tank.

[0014] The heating pump is, in particular, part of the hydraulic circuit or circulation circuit of a household dishwasher. In addition to the heating pump, the hydraulic circuit may include spray devices, for example, in the form of rotatably mounted spray arms. The heating pump supplies the spray devices, which are located in the wash chamber of the household dishwasher, with treatment fluid, i.e., wash liquor and / or fresh water. Simultaneously, the heating pump can introduce heat into the wash liquor and / or fresh water, i.e., more generally, the treatment fluid, by means of a heating element. Accordingly, a "heating pump" in this context is understood to be a pump that is suitable both for circulating wash liquor and / or fresh water in the hydraulic circuit and for supplying heat to the circulated wash liquor and / or fresh water.Circulation is achieved using an impeller. During operation of the heating pump, the impeller pumps the cleaning solution and / or fresh water from the fluid inlet to the fluid outlets. Heat is supplied by the heating element, which is integrated into the heating pump. This type of heating pump can also be referred to as a compact heating pump.

[0015] The heating pump housing is preferably multi-part. For example, the heating pump housing can have a lower housing section and an upper housing section connected to the lower housing section. The impeller is located inside the heating pump housing, and in particular between the lower housing section and the upper housing section. Specifically, the impeller is positioned downstream of the fluid inlet; that is, when the impeller is driven by a rotating impeller during pumping operation, the impeller is located in the flow direction of the flushing solution and / or the fresh water downstream of the fluid inlet. The impeller can be driven, in particular, by means of a drive motor of the heating pump. The drive motor is preferably an electric motor, in particular a BLDC (brushless DC) motor or a permanent magnet synchronous motor (PMSM). It can, in particular, be designed as a wet rotor. The drive motor is integrated into the heating pump.In particular, the drive motor can be permanently attached to the upper part of the housing. The drive motor has a drive shaft which rotates around a central axis of the heating pump housing during operation. The drive shaft is coupled to the impeller.

[0016] The heating pump housing can be constructed, at least in sections, with rotational symmetry about the central axis. This means that parts of the heating pump housing can be rotationally symmetric about the central axis, while other parts of the heating pump housing cannot be rotationally symmetric about the central axis. The central axis can also be referred to as the axis of symmetry or axis of rotation of the heating pump housing. The heating pump is arranged or installed in the household dishwasher, particularly in its base support below the wash tub, such that the central axis runs along or parallel to a direction of gravity. The central axis is thus vertically oriented. The heating pump can therefore also be referred to as a vertical heating pump.That the central axis is "oriented" along or parallel to the direction of gravity particularly preferably includes that the central axis runs exactly along the direction of gravity, so that there is no tilting or inclination of the central axis relative to the direction of gravity. It can also particularly include that the central axis is preferably inclined or tilted by up to ± 20°, more preferably by up to ± 10°, more preferably by up to ± 5°, more preferably by up to ± 3°, and more preferably by up to ± 1°, relative to the direction of gravity. Depending on the installation situation of the heating pump, a suitable slight tilt or inclination of the heating pump with respect to its central axis relative to the vertical can be selected.

[0017] The fluid inlet can be fluidically connected to the pump sump of the household dishwasher, particularly to a fluid outlet of the pump sump in the area of ​​the bottom of a shaft-shaped, downward-projecting liquid collection section of the pump sump, preferably via a suction channel that runs transversely to the central axis and preferably with a slight incline, e.g., 0.5°–3°. This allows the heating pump to draw wash liquor and / or fresh water from the pump sump. The fluid inlet is provided, in particular, on the lower part of the housing. The fluid inlet can be rotationally symmetrical about the central axis. In other words, the fluid inlet can be located centrally on the heating pump housing. The fluid inlet can be tubular or hollow cylindrical, at least in sections. The fluid inlet extends along the central axis. This means, in particular, that the fluid inlet runs parallel to the central axis.The fluid inlet is provided on the underside of the heating pump housing, whereas the fluid outlets are provided on the top side of the heating pump housing.

[0018] The heating pump housing can have any number of fluid outlets. In particular, each of the aforementioned spray devices can be assigned such a fluid outlet. For example, three or four fluid outlets are provided. The fluid outlets are located on the upper or outlet-side end face of the heating pump housing, especially its upper housing section. The fluid outlets are tubular or hollow cylindrical and preferably run parallel to the central axis. When viewed along a radial direction of the heating pump, the fluid outlets are spaced apart from the central axis. The fluid outlets can be arranged unevenly distributed around the central axis.

[0019] The radial direction is oriented perpendicular to the central axis and points away from it.

[0020] In particular, it can be advantageous if the central axis of the impeller of the heating pump is located at least approximately in the center of a circle on which the center point of exactly one fluid outlet, especially the rotatably mounted lower spray arm, and the centers of the other fluid outlets are arranged. Specifically, the radially innermost edge sections, the centers, and / or the radially outermost edge sections of the fluid outlets can each be arranged on imaginary concentric circles with the central axis as their center.

[0021] In an advantageous embodiment, viewed in a cross-sectional plane perpendicular to the central axis, particularly in a top view, the central axis of the impeller is positioned at least approximately in the middle or halfway along the radial distance between the axis of rotation of exactly one spray device and a circular arc segment arranged on an imaginary circle that is at least approximately diametrically opposite, i.e., at about 180°, on which at least approximately the centers of the other fluid outlets are arranged close together, i.e., grouped. This distance corresponds, to a first approximation, in particular to the diameter of the water diverter disc and / or the diameter of a preferably circular cylindrical heating pump housing.

[0022] In particular, it can be advantageous if the pump sump housing is circular when viewed from above. In this case, it can be beneficial if the axis of rotation of the single fluid outlet is preferably located at least approximately in the center of the circular pump sump housing. As a first approximation, the central axis of the heating pump impeller can advantageously be located in the middle of the radial extent or radius of the circular pump sump housing. It can be advantageous if the heating pump is located almost entirely below a projection of the pump sump. This allows for a compact arrangement of the pump sump and heating pump.

[0023] According to one embodiment, the heating pump has an impeller arranged inside the heating pump housing for conveying the flushing liquor and / or fresh water from a fluid inlet of the heating pump housing to the fluid outlets, wherein the impeller is rotatably mounted in the heating pump housing about the central axis of the heating pump housing, and wherein the fluid inlet and the fluid outlets extend along the central axis.

[0024] As previously mentioned, the fluid inlet is at least partially tubular and hollow cylindrical. The fluid outlets are also at least partially tubular or hollow cylindrical. The fluid inlet preferably extends from the underside of the heating pump housing, and the fluid outlets preferably extend from the top side of the heating pump housing. The fluid inlet and the fluid outlets preferably run along or parallel to the central axis. Furthermore, the fluid inlet and the fluid outlets preferably run along or parallel to the axis of rotation of the single spray arm.

[0025] The heating pump housing, in particular its lower and upper housing sections, including its fluid inlet and outlets, can preferably be made of a rigid plastic material such as PP (polypropylene) – optionally reinforced with glass fibers. The fluid inlet can preferably be integrally molded onto the lower housing section, preferably as a single piece and / or integrally. Similarly, the fluid outlets can advantageously be integrally molded onto the upper housing section, preferably as a single piece and / or integrally.

[0026] According to a further embodiment, the axis of rotation and the central axis are positioned parallel to each other and spaced apart. This means, in particular, that a distance is provided between the axis of rotation and the central axis. Specifically, the axis of rotation, viewed along the radial direction of the heating pump, is positioned at a distance from the central axis. According to an advantageous further development, the heating pump preferably has a fluid conveying channel with several successive sections along the central axis: a fluid inlet, an impeller or pump chamber with impeller and heating element, a pressure or feed chamber which has a receiving chamber for a water diverter disc on its outlet side, and one or more fluid outlets. During conveying or pumping operation, the rotating impeller conveys cleaning fluid or cleaning solution and / or fresh water through these successive sections of the fluid conveying channel along the central axis.

[0027] The fluid inlet is advantageously designed to be rotationally symmetrical with respect to the central axis of the impeller, which runs along the direction of gravity. It is located – preferably centrally – on the lower or inlet-side end face of the heating pump housing, particularly its lower housing section, which is preferably largely rotationally symmetrical and, in particular, at least partially approximately circular-cylindrical. It projects downwards along the central axis from the heating pump housing, especially its lower housing section. It is preferably integrally formed with the lower housing section, projecting downwards. It preferably has an inlet section that is at least approximately circular-cylindrical and widens radially towards the impeller in the direction of flow of the flushing fluid, opening into the impeller chamber, which widens radially outwards relative to it.The impeller chamber is approximately circular cylindrical, in particular shallow circular cylindrical. The impeller is centrally located within the impeller chamber and is rotatable about the central axis as its axis of rotation. Viewed in a cross-sectional plane along the central axis, its diameter can expediently correspond approximately to the diameter of the downstream inlet opening of the fluid inlet, less a radial clearance on both sides. Opposite this, the impeller chamber extends radially outwards to an approximately 90° deflection section. From this point, the approximately circular cylindrical impeller chamber transitions into the feed or pressure chamber leading to the fluid outlets, which runs along the central axis. The impeller chamber, or...The pump chamber extends radially outwards from the fluid inlet opening relative to the central axis and transitions there, via a 90° bend, into the supply or pressure chamber, which runs along the central axis and leads to the fluid outlets. It can be advantageous to arrange a tubular heating element in the 90° bend. In particular, a single, P-shaped coil of a tubular heating element can be accommodated there. The tubular heating element can expediently be arranged essentially in the same plane as the impeller so that it lies directly within the fluid flow of flushing solution and / or fresh water generated by the impeller during its rotation, thus transferring thermal energy with high efficiency.It can transfer thermal energy to the treatment fluid (rinsing liquor and / or fresh water) flowing onto and / or around it. Furthermore, it can be advantageous if the tubular heating element is arranged in the 90° bend such that a passage gap for the conveyed cleaning fluid exists between it and the outer boundary wall of the 90° bend, and between it and the inner boundary wall of the 90° bend. This allows the treatment fluid to flow around it completely, improving heat transfer from it to the treatment fluid. In particular, it can be positioned approximately centrally within the bend with respect to its central axis, so that the passage gap width for the conveyed treatment fluid is approximately the same with respect to both its outer and inner boundary walls, which is particularly advantageous from a fluid dynamics perspective.

[0028] The feed or pressure chamber is preferably designed as an annular gap with the central axis located at its center. Viewed in a cross-sectional plane perpendicular to the central axis, it is preferably at least approximately annular in shape at every point along its longitudinal extent. In spatial terms, it is at least approximately annular-cylindrical in shape.

[0029] During operation of the heating pump, the dishwashing liquid and / or fresh water drawn in from the sump of the household dishwasher by the impeller is guided through the centrally located fluid inlet along the vertically oriented central axis to the impeller. It is then deflected by approximately 90° by the impeller and / or by a 90° transition between the downstream inlet section and the impeller chamber inlet section. The fluid is then expelled radially outwards under pressure by the impeller, which rotates around the central axis, creating a circulating flow around the impeller. Subsequently, the treatment fluid (dishwashing liquid and / or fresh water) is drawn into the impeller chamber via the supply and / or...The 90° deflection section connecting the pressure chambers deflects the fluid by 90° from its horizontal circulation plane in the impeller chamber into the annular-cylindrical section of the downstream pressure chamber, where it propagates along the central axis towards the outlet fluid ports. This creates a circulating flow of flushing fluid and / or fresh water in the feed / pressure chamber, moving from bottom to top along the central axis against the direction of gravity, from the impeller chamber through the pressure chamber to the fluid ports. The flushing fluid and / or fresh water conveyed radially outwards by the rotating impeller can thus flow upwards along a helical path in the approximately annular pressure chamber, away from the impeller chamber and towards the fluid ports.

[0030] The outlet section of the feed or pressure chamber, which extends along the central axis in the direction of flow of the heating pump, advantageously provides an approximately annular cylindrical receiving space for a water diverter ring disc, i.e., an annular water diverter disc, of a water diverter. The sections of the inner boundary walls of the pressure chamber and the receiving space preferably run in a straight line along the central axis. Likewise, the outer boundary wall of the section of the feed or pressure chamber located upstream of the receiving space in the direction of flow and the outer boundary wall of the receiving space can preferably run in a straight line along the central axis.If the radial gap width of the receiving space, which is annular in shape (especially circular) in a cross-sectional plane orthogonal to the central axis, is insufficient to accommodate the water diverter ring disc having a predetermined inner diameter and outer diameter, it may be advantageous, according to a preferred embodiment, for the receiving space to have a radial expansion outwards compared to the upstream section of the feed or pressure chamber preceding the receiving space in the conveying direction. For this purpose, it may be advantageous for the outer boundary wall of the receiving area to be arranged radially further outwards than the outer boundary wall of the section of the feed or pressure chamber located upstream of the receiving space in the conveying direction. The receiving space for the water diverter ring disc is separated on the outlet side by a partial area of ​​an outlet-side or pressure chamber.The upper end wall of the heating pump housing, particularly its upper housing section, is defined by this section. This section can be arranged in a plane perpendicular to the central axis. Within this section, one or more through-openings are provided, each with a cross-sectional area for the pumped treatment fluid, to which the central axis is perpendicular. Adjoining these one or more through-openings are fluid outlets, preferably tubular or hollow cylindrical, which are preferably attached to, and in particular integrally formed with, this section. These outlets project upwards from the outlet-side or upper end wall of the pump housing, particularly its upper housing section, along the central axis. They are expediently integrally formed and projecting upwards from the outlet-side end wall of the heating pump housing, particularly its upper housing section.

[0031] According to another embodiment, a supply line to the single spray device runs centrally through a surface sieve of the sieve system.

[0032] The surface sieve can have a central opening through which the supply line of the single spray device passes. It can, in particular, have a substantially circular outer contour or a circular outer envelope. The axis of rotation of the single spray device also passes through this opening. In this case, the supply line can advantageously be part of the single spray device. The single spray device can be rotatably mounted on the single fluid outlet by means of the supply line. The pump sump can have a pump sump housing, which is connected to the upper end face of the heating pump housing, in particular its upper housing section. The single spray device and its supply line can be rotatably mounted on the pump sump housing. The pump sump housing can be arranged between the heating pump housing and the supply line of the single spray device. The pump sump housing can optionally be...it may also be part of the heating pump housing.

[0033] According to a further embodiment, the fluid outlets, with the exception of exactly one fluid outlet, are preferably grouped, wherein the exactly one fluid outlet and the grouped fluid outlets are arranged at least approximately diametrically opposite each other on the heating pump housing, so that a continuous zone is formed on the upper side of the surface screen of the screen system between the exactly one fluid outlet and the grouped fluid outlets, through which a circumferential section of a cleaning area passes at least approximately without interruption.

[0034] The cleaning area can be advantageously designed in the shape of an annular segment, in particular in the shape of a circular annular segment.

[0035] It can be particularly advantageous if the cleaning area is ring-shaped, especially circular, and rotates completely around the axis of rotation. Such a cleaning area is especially beneficial for an annular or circular surface sieve.

[0036] According to an advantageous embodiment, the cleaning area, in particular the cleaning area that rotates around the axis of rotation on the surface sieve, can be generated in a favorable manner by at least one spray jet from at least one sieve cleaning nozzle, which is preferably provided on the exactly one spray device rotatable around the axis of rotation, in particular on the lower spray arm rotatable around the axis of rotation.

[0037] According to an advantageous embodiment, the cleaning area can preferably form a continuous or contiguous annular segment zone or ring zone, in particular a circular annular zone, along which dirt particles deposited on the surface screen during spray or recirculation operation can be flushed by the spray jet to an opening in the surface screen. Through this opening, the dirt particles can be flushed with the treatment fluid, or, to put it simply, with water (rinsing liquor and / or fresh water) from the spray jet, into a downwardly projecting, shaft-shaped liquid collection section of the pump sump, in particular into its raw area, as a dirt load. From the raw area, the water that has flowed into it, containing the dirt load deliberately flushed in from the cleaning area, can be pumped out of the household dishwasher by means of the drain pump.Since, during the draining phase of the emptying pump, this treatment fluid from the clean area flows through the separating screen in the opposite direction to the flow direction during a circulation phase of the heating pump, dirt particles can also be detached from the separating screen, especially from the side facing away from the heating pump, i.e., the side of the separating screen facing the raw area, and removed from the household dishwasher. This ensures proper and efficient self-cleaning of the screen system. Manual cleaning of the screen system by the user is generally no longer necessary.

[0038] In particular, the screen cleaning nozzle can be arranged and designed in such a way that its spray jet can drive or flush dirt particles present on the surface screen forward in the direction of rotation of exactly one spray device rotatable about the axis of rotation, in particular the lower spray arm rotatable about the axis of rotation, towards the opening in the circumferential direction.

[0039] It may be advantageous if the opening is designed as a slit-shaped gap that crosses at least part of the ring-shaped or annular cleaning area at a circumferential point, in particular interrupting it at least part of the radial direction.

[0040] It can be advantageous if the opening is located on the side of the single fluid outlet facing away from the grouped fluid outlets or their associated fluid outlets, in front of it in the surface strainer. If, viewed in the depth direction of the wash chamber of the wash tank, the grouped fluid outlets are preferably located at least approximately at a twelve o'clock position, and the single fluid outlet is preferably located at least approximately at a six o'clock position and thus at the front, the opening can be easily inspected and, if necessary, cleaned or freed from dirt by an operator.

[0041] According to an advantageous further development, it can be particularly beneficial if the cleaning area completely surrounds the axis of rotation as a continuous zone and is fluidically connectable or connected to an opening that leads into a downwardly projecting, shaft-shaped liquid collection section of the pump sump, in particular into its raw area.

[0042] The cleaning zone remains free of fluid outlets, i.e., it is uninterrupted except for an opening – preferably radially traversing it – which leads into a downwardly projecting, shaft-shaped liquid collection section of the pump sump, particularly in its raw area. If, however, one or more fluid outlets were located partially or completely within the cleaning zone, these would impair or prevent the pooling of dirt particles by a spray jet in a desired circumferential direction, particularly in the direction of rotation of the single spray device, especially the lower spray arm – preferably towards the opening.

[0043] In this context, "diametrically" means that the central axis of the heating pump housing is located between the grouped fluid outlets and the single fluid outlet. The annular cleaning area can be cleaned using at least one cleaning nozzle attached to the single spray device. If the single spray device is, in particular, a rotatably mounted lower spray arm with at least one screen cleaning nozzle that, during the heating pump's operation, emits at least one spray jet directed at the cleaning area as it rotates 360° around its axis of rotation, then dirt particles deposited on the surface screen—preferably against the direction of rotation of the spray arm—can be selectively flushed or washed toward the opening and through it into the raw area.Coarse dirt is flushed down the shaft-shaped, downward-projecting liquid collection section of the pump sump. This ensures efficient self-cleaning of the surface filter. In particular, it allows dirt particles to be easily and effectively removed from the wash bath volume that is circulated in the hydraulic circuit during each partial wash cycle of a dishwasher program.

[0044] Given a specific outer diameter of the water diverter disc, the greatest possible distance can be ensured between the single fluid outlet through which the axis of rotation of a single spray device, in particular a rotatable lower spray arm, passes, and the grouped fluid outlets. This allows the annular, in particular circular, cleaning zone of the surface screen of the screen system to be maximized. This annular, in particular circular, cleaning zone is preferably rotated 360° by the liquid jet from a cleaning nozzle provided on the single rotatable spray device, in particular the lower rotatable spray arm, during its rotation.

[0045] If the single fluid outlet, preferably located in the center of a particularly circular pump sump geometry, and the grouped fluid outlets are arranged approximately 180° opposite each other, i.e., diametrically opposed, on a common imaginary circle around the central axis, then, given a specific outer diameter of the preferably circular pump sump geometry, the distance between the single fluid outlet and the grouped fluid outlets, and thus the radial extent or width of the continuous, uninterrupted, annular cleaning zone (except for any opening) along its 360° circumference, can be maximized. The central axis is located at the midpoint of this distance.In other words, the radius of the preferably circular pump sump corresponds approximately to the outer diameter of the water diverter disc and / or the circular cylindrical heating pump housing. The central axis of the impeller is then located at the midpoint of the distance between the single fluid outlet and the diametrically opposed, grouped fluid outlets.

[0046] According to a further embodiment, the grouped fluid outlets are arranged in a radially outer region of the sieve system. In particular, they are positioned radially further outwards than the annular cleaning area.

[0047] If the single fluid outlet through which the axis of rotation of the single spray device, in particular the rotatable lower spray arm, passes, is also arranged within the outer boundary of the surface screen, particularly in its center, then all fluid outlets are advantageously provided within the surface screen of the screen system. In particular, the fluid outlets are each provided projecting upwards along the central axis on the top of the heating pump housing, in particular its upper housing section. Preferably, the fluid outlets can be fluidically connected to associated fluid outlets of the pump sump housing, which each project upwards along the central axis into the rinsing chamber of the rinsing tank. The bottom wall of the rinsing tank can therefore remain free of one or more further openings for fluid outlets or fluid outlets to be connected to them.Therefore, only a single opening can be provided in the base of the flushing tank, to which the pump sump with the filter system is attached. This eliminates additional assembly steps and sealing measures that would otherwise be necessary due to additional openings in the base wall of the flushing tank for fluid outlets.

[0048] In particular, the grouped fluid outlets are positioned in a radially outer region of the pump sump and / or surface screen. This allows for the greatest possible distance between the single fluid outlet and the grouped fluid outlets, thereby enabling the annular, especially circular, cleaning area to be realized with the greatest possible radial width, i.e., extent in the radial direction.

[0049] According to another embodiment, the grouped fluid outlets are located within a partial circle angle of the heating pump housing and / or within a partial circle angle of the pump sump housing of less than 90°.

[0050] In other words, the grouped fluid outlets are placed as close together as possible.

[0051] According to a further embodiment, the grouped fluid outlets are located closer to a rear wall of the rinsing container than the single fluid outlet, so that the grouped fluid outlets are arranged between the single fluid outlet and the rear wall, wherein (when viewed from front to back into the rinsing chamber of the rinsing container) the single fluid outlet is positioned in particular in a six o'clock position, and wherein the grouped fluid outlets are positioned in particular in a twelve o'clock position.

[0052] This positioning of the grouped fluid outlets allows supply lines from the grouped fluid outlets to the other spray devices to be routed as simply and briefly as possible to the rear wall. According to a further embodiment, the grouped fluid outlets and the single fluid outlet are preferably spaced at least 20 mm to 120 mm, preferably 50 mm to 90 mm, apart from each other.

[0053] This allows for the widest possible ring-shaped cleaning area. This improves the cleaning effect when cleaning the sieve system.

[0054] Advantageously, the opening described above, leading into the shaft-shaped, downward-projecting liquid collection section, is provided in a section of the annular cleaning area located on the side of the single fluid outlet facing away from the grouped fluid outlets. When viewing the rinsing chamber of the rinsing tank from front to back in the direction of depth, it is advantageous for the opening to be positioned in front of the single fluid outlet. This allows convenient access from the front for a user or maintenance personnel.

[0055] According to a further embodiment, the heating pump has a water diverter partially or fully integrated into the heating pump housing for supplying selected fluid outlets with flushing fluid and / or fresh water. The water diverter preferably has a water diverter disc, in particular annular in shape, rotatably mounted in the heating pump housing about the central axis of the impeller. The water diverter disc has an outer diameter preferably greater than or equal to 95 mm, more preferably between 105 mm and 130 mm.

[0056] The fluid outlets can, in particular, be part of the water diverter integrated into the heating pump. They preferably project upwards along the central axis from the upper end face of the heating pump housing, especially its upper housing section. The water diverter disc is, in particular, annular, preferably circular. The water diverter disc has perforations with several openings or ports, which are provided for the flow of flushing fluid and / or fresh water. If the respective opening is positioned, by rotating the water diverter disc (upstream of the heating pump during operation), partially or completely overlapping the inlet cross-sectional area of ​​the respective fluid outlet, and thus its inlet cross-sectional area is partially or completely freely accessible from the section of the pressure or supply chamber of the heating pump housing located upstream of the water diverter disc, i.e.,When open, the flushing solution and / or fresh water pumped by the rotating impeller can flow into this fluid outlet and exit the heating pump through it. The openings allow for the selective opening or closing of individual fluid outlets or multiple outlets. This makes it possible to selectively supply individual spray nozzles with flushing solution and / or fresh water using the water diverter, while simultaneously deactivating or closing other spray nozzles. If necessary, all spray nozzles can also be supplied with flushing solution and / or fresh water simultaneously. All openings in the water diverter disc can also be closed if desired.

[0057] The water diverter disc is arranged within the heating pump housing. Specifically, the water diverter disc is positioned between the lower and upper housing sections. The water diverter disc may be floatingly mounted. The water diverter disc can be driven, in particular rotated about its central axis, by means of a water diverter drive. The water diverter drive may include a drive ring coupled to the water diverter and a worm shaft for driving the drive ring. The water diverter drive comprises a drive motor. The drive motor may preferably be a BLDC (brushless DC) motor or a permanent magnet synchronous motor that is electrically commutated. This drive motor of the water diverter drive may, in particular, be designed as a wet rotor motor.

[0058] The fact that the water diverter is "integrated" into the heating pump housing means, in this case, that the water diverter is not a separate assembly from the heating pump, but rather that the water diverter is located within the heating pump housing and / or that the water diverter is at least partially formed by the heating pump housing. For example, the water diverter disc is located within the heating pump housing, and the fluid outlets, which are part of the water diverter, are also simultaneously part of the heating pump housing.

[0059] The fact that fluid outlets can be "selected" using the water diverter means, in this case, that certain fluid outlets can be opened and others closed by rotating the water diverter disc. This rotation of the water diverter disc can be carried out, for example, depending on the wash program currently being run in the household dishwasher.

[0060] According to an advantageous embodiment of the invention, the inner diameter of the annular, in particular circular, water diverter disc can preferably correspond at least to the (outer) radius of the annular, in particular circular, cleaning area of ​​the surface sieve of the sieve system.

[0061] Preferably, the central axis of the fluid outlet associated with the lower, rotatable spray arm, which projects upwards, preferably at least approximately vertically upwards, is aligned with the central axis of the feed tube of the lower, rotatable spray arm, which also projects upwards, preferably at least approximately vertically upwards. The central axis of this feed tube thus coincides with the axis of rotation of the lower, rotatable spray arm. In particular, it can be advantageous from a fluid dynamics perspective if the outlet cross-sectional area of ​​the fluid outlet associated with the lower, rotatable spray arm coincides at least approximately with the inlet cross-sectional area of ​​the feed tube of the lower spray arm.

[0062] In particular, the fluid outlet associated with the lower, rotatable spray arm, which projects upwards, preferably at least approximately vertically, and through which the axis of rotation of the lower, rotatable spray arm runs, is aligned with the feed pipe of the lower, rotatable spray arm, which extends upwards, preferably at least approximately vertically.

[0063] According to an advantageous embodiment, it can be particularly useful if the preferably tubular fluid outlets of the heating pump are connected from below to the pump sump with connection sections and / or passages, i.e., fluid outlets, provided therein, preferably tubular, in a fluidically tight manner – preferably with the aid of sealing elements – and in particular, joined together, preferably plugged together. In particular, such connection sections, preferably tubular, can be provided on the upper side of a projection of the pump sump, which extends outwards in a plane transverse to the central axis, and in particular perpendicular to the central axis, and thus laterally or sideways from the upper edge of a downwardly projecting, shaft-shaped liquid collection section of the pump sump, preferably being integrally formed on the upper side of the projection.They serve for the fluidic coupling of the supply lines leading to the spray devices. Their inlets or inlet sections are located, in particular, on the underside of the overhang. These can also include sealing receptacles for sealing elements attached to the fluid outlets. Advantageously, these connection sections project upwards from the top of the pump sump, especially its overhang, along the central axis, particularly at least approximately vertically. They preferably form aligned extensions of the fluid outlets of the heating pump, which are coupled to their inlet openings – preferably from the underside of the overhang of the pump sump. The fluid outlets can thus be extended or supplemented by such connection sections or connection passages of the pump sump along the central axis.In other words, such connection sections or connection passages of the pump sump can be attributed to the fluid outlets.

[0064] In particular, it may be advantageous if the connection sections of the pump sump housing, or the housing as a whole, are made of a rigid plastic material such as PP (polypropylene) – possibly reinforced with glass fibers. They can advantageously be molded onto the top of the pump sump housing, preferably as a single piece and / or in one piece.

[0065] Advantageously, the fluid outlets and their associated connection sections or passages can be connected to one another by a single, linear joining movement along the central axis. In the connection section associated with the lower spray arm, which projects upwards from the upper side of the pump sump overhang, and in particular projects upwards at least approximately vertically, and / or in the connection passage associated with the lower spray arm in the wall of the overhang, and / or in the fluid outlet associated with the lower spray arm, the feed pipe of the lower spray arm can, in particular, be rotatably mounted. This means that this connection section and / or connection passage and / or the fluid outlet connected to it advantageously includes a pivot bearing for the feed pipe of the lower spray arm.In particular, the axis of rotation of the lower, rotatable spray arm runs through its associated fluid outlet and its corresponding connection section and / or connection passage. Specifically, the path of the axis of rotation of the lower, rotatable spray arm is at least approximately identical to the path of the central axis of its associated connection section (or connection passage) and / or fluid outlet.

[0066] In a further advantageous development, it may be expedient, as a modification of this, for the fluid outlets to penetrate the associated through-openings in the overhang of the pump sump from bottom to top and project upwards from the overhang, particularly along the central axis. In this case, the upwardly projecting sections of the fluid outlets form outlet-side connection sections for the supply lines leading to the spray devices. Thus, the fluid outlets themselves comprise outlet-side connection sections for the supply lines leading to the spray devices.It is advantageous to provide a sealing receptacle for a sealing element on the underside of the overhang of the pump sump around the respective through-opening at the fluid outlet to be inserted into it, and / or a sealing element between the respective through-opening and the section of the fluid outlet to be inserted into it - preferably around this section.

[0067] From a fluid dynamics perspective, it is particularly advantageous if the single fluid outlet through which the axis of rotation of a spray device, in particular the rotatable lower spray arm, passes, and the grouped fluid outlets at least almost diametrically opposite it, each form an extension of the annular supply chamber or annular gap, preferably extending along the central axis, and in particular at least approximately aligned, in the upward direction of delivery, especially its outlet-side, upper receiving chamber accommodating the preferably annular water diverter disc, i.e., in the delivery operation of the heating pump, downstream of the water diverter disc.Since the openings in the water diverter disc, which serve for the passage of flushing liquor and / or fresh water and for supplying the fluid outlets with flushing liquor and / or fresh water, are preferably arranged in a cross-sectional plane perpendicular to the central axis of the heating pump housing within the inner and outer boundary walls of the annular gap space, in particular its outlet-side receiving space, i.e., in an annular zone located radially inside the inner boundary wall and radially outside the outer boundary wall of the annular gap space, i.e., the annular supply or pressure space, in particular its outlet-side receiving space, deflections for the flow of the flushing liquor and / or fresh water from the supply space into the one or more fluid outlets opened or released by the water diverter disc are largely avoided.Rather, in the operation of the heating pump, the flow of the flushing solution and / or the fresh water with a main directional component runs largely in a straight line along the central axis from the feed chamber, in particular its outlet-side receiving chamber equipped with the water diverting disc, into the respective fluid outlet, when an electromechanical drive unit rotates the water diverting disc around the central axis into such a circumferential position that an opening in the water diverting disc is partially or completely aligned with the inlet opening of the fluid outlet and therefore the fluid outlet is partially or completely open.

[0068] Further possible advantageous implementations of the household dishwasher also include combinations of features or embodiments specified previously and / or subsequently with regard to exemplary embodiments, even if not explicitly mentioned. In such cases, a person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the household dishwasher. Further advantageous configurations and aspects of the household dishwasher are the subject of the dependent claims and / or the exemplary embodiments of the household dishwasher described below.

[0069] The invention and its advantageous developments and refinements, as well as their advantages, are explained in more detail below with reference to drawings.

[0070] They show, each in a schematic diagram:

[0071] Figure 1 shows a schematic perspective view of an embodiment of a household dishwasher,

[0072] Figure 2 shows a schematic sectional view of the household dishwasher according to Figure 1, viewed from its right side; Figure 3 shows in detail a schematic sectional view of an embodiment of a heating pump for the household dishwasher according to Figure 1, viewed from its right side.

[0073] Figure 4 shows a schematic top view of the heating pump according to Figure 3 for a viewer looking down at the heating pump from the right side of the household dishwasher, omitting the pump sump and filter system.

[0074] Figure 5 shows a schematic bottom view of an embodiment of a water diverter for the heating pump according to Figure 3, and

[0075] Figure 6 shows a schematic top view of an embodiment of a base of a washing container for the household dishwasher according to Figure 1, from the viewpoint of an operator standing in front of the household dishwasher and looking into the washing chamber of the washing container from front to back towards its rear wall with the front door open.

[0076] In the figures, identical or functionally equivalent elements have been given the same reference symbols, unless otherwise indicated.

[0077] Figure 1 schematically shows, in perspective view, an embodiment of a household dishwasher 1. Viewed from the perspective of an operator standing in front of the dishwasher 1 at its installation or mounting location, the household dishwasher 1 is represented by a coordinate system with a depth direction (x-direction), a height direction (y-direction), and a width direction (z-direction). The directions x, y, and z are oriented perpendicular to each other.

[0078] The household dishwasher 1 comprises a wash tub 2, the loading opening 6 of which – preferably at the front – can be closed by a door 3, in particular a front door, preferably watertight. For this purpose, a sealing device can be provided between the door 3 and the wash tub 2. The wash tub 2 is preferably cuboid in shape. The wash tub 2 can be arranged in a housing of the household dishwasher 1. The wash tub 2 and the door 3, in its closed position (approximately vertical), can enclose a wash chamber 4 for washing items.

[0079] The door 3 is shown in its open position in Figure 1. The door 3 can be opened or closed by pivoting it – preferably about a pivot axis 5 provided at a lower end of the door 3. The door 3 allows the loading opening 6 of the washing container 2, which in this exemplary embodiment is preferably located at the front, to be opened or closed. The washing container 2 has a base 7, a ceiling 8 opposite the base 7, a rear wall 9 opposite the closed door 3, and two opposing side walls 10, 11. The base 7, the ceiling 8, the rear wall 9, and the side walls 10, 11 can, for example, be made of stainless steel. Alternatively, the base 7 can, for example, be made of a plastic material.

[0080] The household dishwasher 1 further comprises at least one dishware holder. Preferably, several, for example three, dishware holders such as 12, 13, 14 can be provided, wherein dishware holder 12 can be a lower dishware holder, in particular a lower basket, dishware holder 13 an upper dishware holder, in particular an upper basket, and dishware holder 14 a top dishware holder, in particular a cutlery drawer. As Figure 1 further shows, the dishware holders 12, 13, 14 are arranged one above the other with vertical spacing between them in the wash tub 2. Each dishware holder 12, 13, 14 can be selectively moved into or out of the wash tub 2. In particular, each dishware holder 12, 13, 14 can be pushed or driven into the dishwashing container 2 in an insertion direction E and can be pulled or driven out of the dishwashing container 2 in an extraction direction A opposite to the insertion direction E.

[0081] Figure 2 shows a highly schematic sectional view of the household dishwasher 1 from Figure 1, viewed from its right side. The right side is the side of the household dishwasher that an operator standing in front of the dishwasher at its installation location would see when looking from front to back in the depth direction x of the dishwasher 1. In addition to the wash tub 2, the household dishwasher 1 includes a base support 15, which is located below and supports the wash tub 2. The base support 15 is, for example, a plastic component, in particular an injection-molded plastic component. The base support 15 is box-shaped or cuboid. In the orientation of Figure 2, the direction of gravity g is oriented from top to bottom.

[0082] Below an opening or passage DB provided in the base 7 of the flushing tank 2, a pump sump 16 is provided, which is fluidically sealed to an edge zone of the base 7 that surrounds the opening or passage DB. Viewed from above (see Figure 6), the opening or passage DB preferably has a roughly circular geometry. It is preferably arranged axially symmetrically to the center line of the base 7 extending in the depth direction x. In particular, its center point can be located approximately in the region of the intersection of the diagonals of the rectangular base 7. Corresponding to the circular geometry of the opening or passage DB,The pump sump 16 advantageously has an outer contour that is at least approximately circular, preferably with a diameter such that its outer edge zone can be fluidically sealed to an edge zone of the base 7 that runs around the opening or opening DB of the base 7, particularly on its underside. A pump sump 16 is therefore preferably provided on the base 7 below it. The pump sump 16 can be a plastic component, in particular an injection-molded plastic component. The pump sump 16 comprises a filter system 17. The filter system 17 has a surface filter or screen 18 that covers the pump sump 16 from above, and in particular from the inside of the rinsing tank 2 on the bottom side. The pump sump 16 comprises a pot-shaped part that extends downwards out of the base 7 in the orientation shown in Figure 2. It therefore has a downwardly projecting, shaft-shaped liquid collection section S16.From its upper wall section in the area of ​​its inlet-side opening 100, a cantilever AK projects laterally outwards in a roof-like shape in a plane perpendicular to the central axis. The cantilever AK can advantageously be designed such that it has at least a partial slope towards the opening 100, so that rinsing liquor and / or fresh water F, which, after its distribution by spray devices such as 28, 29, 30 provided in the rinsing chamber 4 of the rinsing tank 2, falls to the bottom or drips down and passes through the holes or pores of the surface sieve 18 downwards onto the cantilever AK, can flow through the opening 100 into the shaft-shaped liquid collection section S16. In Figure 2, viewed in the depth direction x, the shaft-shaped, downwardly projecting liquid collection section S16 is preferably arranged in front of the cantilever AK, i.e.,The projection AK faces the rear wall 9 of the wash container, while the opening 100 faces the front loading opening 6 of the wash container 2 or the front of the household dishwasher 1.

[0083] Furthermore, the sieve system 17 comprises a fine filter or fine sieve 19, which is arranged at least partially within the shaft-shaped liquid collection section S16, i.e., in the chamber of the pot-shaped part of the pump sump 16. The fine sieve

[0084] The partition 19 can be, in particular, plate-shaped and preferably, as an upright, especially at least approximately vertical, partition wall, separate the pump sump 16 into a raw area or coarse dirt area 20 and a clean area 21. Rinsing liquor and / or fresh water F can enter the raw area 20 and / or the clean area 21 through the surface screen 18 covering the top of the pump sump 16. Furthermore, rinsing liquor and / or fresh water F can pass through the fine screen 19 from the raw area.

[0085] The raw material flows from area 20 into clean area 21 and vice versa. Raw area 20 can also be referred to as the dirty area. Clean area 21 can also be referred to as the recirculation area.

[0086] A drain 22 opens from the pump sump 16, specifically from the pipe section 20. A deionization pump or emptying pump 23 is connected to the drain 22. Using the deionization pump 23, contaminated rinsing solution and / or fresh water F can be pumped out of the pipe section 20 of the shaft-shaped liquid collection section S16 via a wastewater line 24. The wastewater line 24 can preferably be connected to a stationary drain of a building, such as a building-side wastewater pipe.

[0087] Furthermore, a drain or connecting channel 25 opens from the pump sump 16, in particular from the clean area 21. The drain 25 can open from the bottom or side of the pump sump 16, in particular from its clean area 21, preferably via a fluid outlet A21, which is provided in a wall section of the shaft-shaped liquid collection section S16 associated with the cantilever AK in the area of ​​its chamber base, in particular the chamber base of the clean area 21. A heating pump 26 is connected to the outlet side of the drain or connecting channel 25. With the aid of the heating pump 26, the wash liquor and / or fresh water F can be circulated in the hydraulic circuit 37 of the household dishwasher 1, which comprises the wash chamber 4. The heating pump 26 is therefore designed to circulate the wash liquor and / or fresh water F. Furthermore, the heating pump 26 is also designed to introduce heat into the wash liquor and / or the fresh water F.The heating pump 26 can be attached to the pump sump 16. In particular, the heating pump 26 can be at least approximately completely housed in the space below the cantilever AK and behind the front, shaft-shaped liquid collection section S16. The heating pump 26 is preferably a compact heating pump and can therefore also be referred to as such.

[0088] In the orientation shown in Figure 2, a fluid inlet 44 of the heating pump 26 is arranged with respect to the direction of gravity g at least approximately at the level of the chamber bottom of the downwardly projecting, shaft-shaped liquid collection section S16 of the pump sump 16, so that rinsing liquor and / or fresh water F can drain from the heating pump 26 back into the pump sump 16, in particular into the clean area 21 and through the fine sieve 19 into the raw area 20, when the heating pump 26, in particular its impeller 45, (see Figure 3) is switched off after a pumping or circulation phase. From there, the rinse water and / or the fresh water can be pumped into the wastewater line 24 by means of the drain pump 23 when required, such as at and / or after the end of a liquid-carrying partial rinse cycle, such as the pre-rinse cycle, the cleaning cycle, the intermediate rinse cycle, and / or the final rinse cycle, of a dishwashing program to be carried out.The heating pump 26 can be advantageously positioned below the overhang AK, higher than the bottom of the chamber of the shaft-shaped liquid collection section S16, particularly its clean zone 21. This facilitates its self-draining when its impeller 45 is switched off. It is especially advantageous if the fluid inlet 44 of the heating pump 26 is positioned slightly higher than the fluid outlet A21 in the wall section of the shaft-shaped liquid collection section S16 that defines the clean zone 21. In this case, the connecting channel 25 from the heating pump 26 towards the pump sump 16 has a gradient, which promotes the gravity-driven self-draining of the heating pump 26 when its impeller 45 (see Figure 3) is switched off.

[0089] The heating pump 26 is in fluid connection with a water diverter 27. The water diverter 27 is preferably partially or completely integrated into the heating pump 26. This is indicated in Figure 2 by the fact that the heating pump 26 and the water diverter 27 are arranged within a common frame shown with dashed lines. This frame can preferably symbolize a heating pump housing 41 of the heating pump 26. The water diverter 27 is thus part of the heating pump 26. With the aid of the water diverter 27, it is possible to selectively distribute the cleaning solution and / or the fresh water F pumped by the heating pump 26 to different spray devices provided in the cleaning tank 2, such as 28, 29, 30. With the aid of the water diverter 27, the spray devices, such as 28, 29, 30, can be selectively supplied with cleaning solution and / or fresh water F or not.

[0090] The lower spray device 28 and the upper spray device 29 can preferably be rotatable spray arms, whereas the uppermost spray device 30 can be a rotatable roof-mounted sprayer or a fixed roof-mounted spray head. Additionally, switchable intensive spray zones or one or more screen cleaning nozzles (not shown) can be provided as further spray devices. For example, the lower spray device 28, in particular a rotatable lower spray arm, is rotatably mounted below the lower dish-holding unit 12 about a pivot axis 31 on the base 7, the pump sump 16, the screen system 17, and / or the heating pump 26. The lower spray device 28 has spray nozzles that spray the wash liquor and / or the fresh water F upwards into the dish-holding unit 12 and / or downwards towards the bottom of the wash tank 7 and the surface screen 18 of the screen system 17 located there, as shown in Figure 2.

[0091] The upper spray device 29, in particular a rotatable upper spray arm, can be rotatably mounted on the upper dish holder 13 about a pivot axis 32. The upper spray device 29 also has spray nozzles which are configured to spray the dishwashing liquid and / or the fresh water F downwards and / or upwards in the orientation shown in Figure 2. The uppermost spray device 30 can be rotatably mounted on the ceiling 8 about a pivot axis 33 or be fixed there. The spray device 30 applies dishwashing liquid and / or fresh water F to the dish holder 14 from top to bottom in the orientation shown in Figure 2.

[0092] The lower spray device 28 is connected to the heating pump 26, and in particular to the water diverter 27, via a supply line 34. The heating pump 26 can supply the spray device 28 with rinsing solution and / or fresh water F via the supply line 34.

[0093] The upper spray device 29 is connected to a supply line 35, which fluidically connects the spray device 29 to the heating pump 26. The heating pump 26 can supply the spray device 29 with rinsing solution and / or fresh water F via the supply line 35.

[0094] The uppermost spray device 30 is connected to a supply line 36, which fluidically connects the spray device 30 to the heating pump 26. The heating pump 26 can supply the spray device 30 with rinsing solution and / or fresh water F via the supply line 36.

[0095] Each spray device 28, 29, 30 can have its own supply line 34, 35, 36. Alternatively, some of the spray devices 28, 29, 30 can share a common supply line that branches out. In particular, the supply lines 34, 35, 36 can be formed by a common component, especially a common injection-molded plastic component. The supply lines 34, 35, 36 are preferably routed along the rear wall 9 from the base 7 towards the ceiling 8. The supply lines 34, 35, 36, or at least a portion of them, can pass through the sieve system 17, in particular through its surface sieve 18.

[0096] The heating pump 26 preferably has a separate connection or fluid outlet 59, 62, 61 for each supply line 34, 35, 36. The pump sump 16, the connecting channel 25, the heating pump 26, the supply lines 34, 35, 36, the spray devices 28, 29, 30 and the wash chamber 4 of the wash tank 2 together form the hydraulic circuit 37 of the household dishwasher 1. The heating pump 26 circulates the wash liquor and / or the fresh water F in this hydraulic circuit 37. The fluid outlets, preferably tubular, such as 59, 60, 61, 62 of the heating pump 26, are expediently connected on the underside of the projection AK facing them, i.e. from below, to the preferably tubular connection sections 93, 94, 95, 96 or connection passages provided on the projection AK of the pump housing 16 in a fluidically tight manner - preferably with the aid of sealing elements (see e.g. D59, D62 in Figure 3) - in particular joined together, preferably plugged together.In particular, such connection sections 93, 94, 95, 96 can be provided on the upper surface of the cantilever AK, which projects outwards in a plane transverse to the central axis 40 of the impeller 45 of the heating pump 26, and in particular perpendicular to the central axis 40, and thus laterally or sideways from the upper edge of the downwardly projecting, shaft-shaped liquid collection section S16 of the pump sump 16, preferably being integrally formed on the upper surface of the cantilever AK. They each preferably project upwards from the upper surface of the cantilever AK parallel to the central axis 40, and in particular at least approximately vertically. Their inlets are located on the underside of the cantilever AK, which faces the heating pump 26. They preferably form aligned extensions of the fluid outlets 59, 60, 61, 62 of the heating pump 26, which are fluidically coupled to their inlet openings – preferably from the underside of the cantilever of the pump sump.The fluid outlets 59, 60, 61, 62 can therefore be extended along the central axis 40 by such connection sections 93, 94, 95, 96 and / or connection passages of the pump sump 16. In other words, such connection sections and / or connection passages of the pump sump can be assigned to the fluid outlets. Advantageously, the fluid outlets 59, 60, 61, 62 can be connected to their associated connection sections 93, 94, 95, 96 and / or connection passages by a single, linear joining movement along the central axis 40. In the connection section 93, which projects upwards from the upper side of the cantilever AK of the pump sump 16 and is associated with the lower spray arm 28, in particular at least approximately vertically upwards, and / or in the connection passage associated with the lower spray arm 28 in the wall of the cantilever AK, the supply pipe 34 of the lower spray arm 28 can in particular be rotatably mounted, i.e.This connection section 93 and / or the connection passage and / or the fluid outlet 59 associated with it advantageously includes a pivot bearing for the feed pipe 34 of the lower spray arm 28. This is shown in the sectional view of Figure 3. The axis of rotation 31 of the lower, rotatable spray arm 28 passes through the fluid outlet 59 associated with it, as well as its associated connection section and connection passage. In particular, the path of the axis of rotation 31 is identical to the path of the central axis of the fluid outlet 59, as well as of the connection passage and associated connection section 93 associated with it.

[0097] As a variation of this, it may also be advantageous if the fluid outlets 59, 60, 61, 62 penetrate the associated through-openings or connection passages in the overhang AK of the pump sump from bottom to top and protrude upwards from the overhang AK, particularly along the central axis. In this case, the sections of the fluid outlets projecting upwards from the overhang AK form outlet-side connection sections for the supply lines, such as 34, 35, 36, leading to the spray devices, such as 28, 29, 30. It is advantageous to provide a sealing element between the respective through-opening and the section of the associated fluid outlet that penetrates it—preferably all around this section. This variant is not shown separately due to its functional similarity to the embodiment described above with reference to Figure 3.

[0098] The household dishwasher 1 also includes a control unit 38. Different dishwashing programs of the household dishwasher 1 can be executed using the control unit 38. For this purpose, wash programs can be stored or saved in the control unit 38. The control unit 38 is preferably arranged outside the wash tub 2.

[0099] The control unit 38 can be arranged, for example, in or on the door 3 or in an area below the wash tank 2. As shown in this exemplary embodiment, the control unit 38 can preferably be housed in the base support 15. The control unit 38 can be operated or actuated by means of control elements (not shown). These control elements can include, for example, buttons, knobs, and / or touchscreens and / or other sensory elements. These can preferably be mounted on the door 3.

[0100] The control unit 38 can be used to control the heating pump 26. For example, the control unit 38 can be used to switch the heating pump 26 on and off and / or change its speed. The control unit 38 can receive and evaluate information from the heating pump 26, such as its speed and / or motor current. Furthermore, the control unit 38 can also control the water diverter 27 to selectively switch the spray devices 28, 29, 30 on or off.

[0101] The items to be cleaned 39 are arranged in the washing container 2. These items 39 can include, for example, glasses, plates, pots, bowls, cutlery, or the like. In particular, the items 39 are held in the item holders 12, 13, 14 (not shown in Figure 2). The items 39 can be sprayed with washing solution and / or fresh water F, i.e., more generally, with treatment fluid, by means of the spray devices 28, 29, 30.

[0102] Figure 3 shows a schematic sectional view of an advantageous embodiment of a heating pump 26 as previously mentioned, viewed from the right side of the household dishwasher 1. Figure 4 shows a top view of the heating pump 26, also viewed from the right side. Reference is made to Figures 3 and 4 simultaneously below.

[0103] The heating pump 26 has an axial direction AX, which, in the orientation shown in Figure 3, extends from bottom to top (opposite the direction of gravity g). The axial direction AX can coincide with the y-direction y. In particular, the axial direction AX coincides with or is oriented parallel to a symmetry or central axis 40 of the heating pump 26. Furthermore, the heating pump 26 has a radial direction R. The radial direction R is perpendicular to and oriented away from the central axis 40. The axial direction AX and the radial direction R are thus perpendicular to each other. The heating pump 26 is therefore vertically oriented. The central axis 40 runs along the direction of gravity g or is oriented parallel to it.

[0104] The heating pump 26 has a heating pump housing 41 with a one-piece lower housing part 42 and a one-piece upper housing part 43. The lower housing part 42 and the upper housing part 43 can be plastic components, in particular injection-molded plastic components.

[0105] The lower housing part 42 and the upper housing part 43 can be connected to each other, in particular by a positive locking and / or force-locking connection (not shown). A positive locking connection is created by the interlocking or overlapping of two connecting parts, in this case the lower housing part 42 and the upper housing part 43. The lower housing part 42 and the upper housing part 43 can be latched or snapped together. For this purpose, latching hooks, snap hooks, or the like can be provided, which enable a positive locking connection of the lower housing part 42 with the upper housing part 43. However, a bayonet connection and / or a screw connection can also be provided.

[0106] The lower housing part 42 has the fluid inlet 44 to which the outlet or connecting channel 25 is connected. For example, the outlet or connecting channel 25 is pushed onto the fluid inlet 44 and sealed against it by means of a sealing element, for example in the form of an O-ring. The heating pump housing 41 is essentially rotationally symmetrical about the central axis 40.

[0107] The lower housing part 42 accommodates the impeller 45, which is arranged downstream of the fluid inlet 44. The impeller 45 is not shown in section in Figure 3. The impeller 45 can be a vane or be described as such. The impeller 45 is driven by a drive motor 46. The drive motor 46 is an electric motor. The impeller 45 can also be referred to as an impeller. The drive motor 46 comprises a drive shaft 47 that is non-rotatably connected to the impeller 45 and rotates about the central axis 40 during operation of the heating pump 26. In addition to the impeller 45, a rotor 48 of the drive motor 46 is non-rotatably connected to the drive shaft 47.

[0108] The rotor 48 is rotatably mounted about the central axis 40 in a cup-shaped first receiving section 49 of the upper housing part 43. In the sectional view of Figure 3, which shows the heating pump 26 in its installed position below the overhang AK of the pump sump 16 when viewed from the right side, the first receiving section 49 is designed as an inverted cup. Thus, its base is located at the top. It forms a closed lid for the receiving section 49. In contrast, the insertion opening of this inverted cup is located at the bottom. The rotor 48 can be inserted into the first receiving section 49 during the manufacture of the heating pump 26 via this lower insertion opening. The first receiving section 49 therefore encloses a receiving chamber 50 in which the rotor 48 is held. The receiving chamber 50 can be filled with rinsing solution and / or fresh water F.The lower insertion opening of the first receiving section 49 is closed by a closure 51, facing downwards in the direction of the impeller 45, as shown in Figure 3. The drive shaft 47 passes centrally through the closure 51 and may optionally be supported by it. Its upper end section is advantageously rotatably mounted in a bearing provided at the top of the closed cover of the receiving section 49.

[0109] The drive motor 46 can be, in particular, a BLDC (brushless DC) motor or a permanent magnet synchronous motor (PMSM), especially a wet rotor motor, with a vertical orientation. The drive motor 46, with its drive shaft 47 oriented vertically, is integrated and / or embedded in the upper housing part 43. The drive motor 46 drives the impeller 45 via its rotor shaft 47. The impeller draws in the cleaning solution and / or fresh water F from bottom to top via the centrally located fluid inlet 44, deflecting it by 90° into an impeller chamber LR of the heating pump 26, which is at least approximately circular and cylindrical in shape, and accelerates it outwards in the radial direction R. The impeller 45 is centrally located within the impeller chamber LR with its central axis 40.The impeller chamber LR is rotationally symmetrical to the central axis 40 and extends further radially outwards relative to the radially outer contour of the impeller 45, where it transitions via a 90° deflection section UL into a feed channel 66 that rises from bottom to top, runs parallel to the central axis 40, and is preferably at least approximately annular-cylindrical.

[0110] In addition to the first receiving section 49, the upper housing part 43 includes a second receiving section 52. The second receiving section 52 is also cup-shaped. However, unlike the first receiving section 49, the second receiving section 52, in the orientation shown in Figure 3, is open at the top rather than the bottom. The first receiving section 49 is located inside the second receiving section 52. The second receiving section 52 therefore has a larger diameter than the first receiving section 49.

[0111] An annular, in particular circular cylindrical, receiving chamber 53 is provided between the first receiving section 49 and the second receiving section 52. A stator 54 of the drive motor 46 is arranged in the receiving chamber 53. It may be advantageous if the stator 54 is bonded to the first receiving section 49 and / or the second receiving section 52.

[0112] The lower housing section 42 has a plate-shaped base section 55 and a tubular or hollow cylindrical wall section 56. The fluid inlet 44 is preferably centrally located on the base section 55. Both the base section 55 and the wall section 56 are rotationally symmetrical about the central axis 40. The base section 55 and the wall section 56 transition into each other at the 90° deflection section UL by means of a circumferential radius 57 around the central axis 40. A connecting section 58, which also circumferentially surrounds the central axis 40, adjoins the wall section 56. The upper housing section 43 is connected or coupled to the lower housing section 42 at the connecting section 58.

[0113] The upper housing part 43 has several fluid outlets 59, 60, 61, 62. Supply lines 34, 35, 36 are connected to the fluid outlets 59, 61, 62. If three spray devices 28, 29, 30 are provided, preferably exactly three fluid outlets 59, 61, 62 are also provided. If, for example, four spray devices are provided, correspondingly four fluid outlets such as 59, 60, 61, 62 are also provided. The fluid outlets 59, 60, 61, 62 are arranged unevenly around the central axis 40. The fluid outlets 59, 60, 61, 62 are each oriented at least approximately vertically upwards and thus along the central axis 40. They are preferably integrally formed with the upper housing part 43. They can preferably be made of a rigid material. The upper housing part 43, including its fluid outlets 59, 60, 61, 62 projecting upwards parallel to the central axis 40, can in particular be made entirely of the same plastic material as, for example,The housing should be made of PP. It may be advantageous to provide an additional elastic plastic material, such as TPE (thermoplastic elastomer), on the outside of each fluid outlet's end section, forming a sealing element such as D59, D62 (see Figure 3). The sealing element can preferably be designed as a sealing ring that surrounds the outer shell of the fluid outlet at least along one longitudinal section. The sealing element can be attached to the fluid outlet or injection-molded onto its outer shell – particularly during the manufacturing of the housing upper part by 2K plastic injection molding. The fluid outlets 59, 60, 61, 62 are part of the water diverter 27. Thus, the housing upper part 43 can be at least partially part of the water diverter 27. In this case, the fluid outlet 59 is assigned to the spray device 28.Fluid outlet 60 is an additional outlet or a "feature" outlet, which may, for example, be assigned to an intensive spray zone (not shown) and is provided in addition to fluid outlets 59, 62, and 61 assigned to spray devices 28, 29, and 30. Fluid outlet 61 is assigned to spray device 30, and fluid outlet 62 is assigned to spray device 29. However, the assignment can also be configured differently.

[0114] The fluid outlets 59, 60, 61, 62 are preferably tubular and extend along the central axis 40 or along the axial direction AX. The fluid outlets 59, 60, 61, 62 can each have a circular, elliptical, or oval cross-section. During operation of the heating pump 26, flushing fluid and / or fresh water F can be discharged upwards via the fluid outlets 59, 60, 61, 62.

[0115] The fluid outlets 59, 60, 61, 62 extend from a closing plate 63 of the upper housing 43, which closes off the end face of the upper housing 43. A tubular or hollow cylindrical connecting section 64 runs around the closing plate 63, by means of which the upper housing 43 is connected to the connecting section 58 of the lower housing 42. The multiple fluid outlets 60, 61, 62 are arranged within a partial circular angle α of the pump housing 41, i.e., they are grouped together. The partial circular angle α is less than 90°.

[0116] The upper housing part 43 further comprises a tubular or hollow cylindrical wall section 65, which is arranged within the wall section 56 of the lower housing part 42. The wall section 65 is, in particular, part of the second receiving section 52. The wall section 65 is rotationally symmetrical about the central axis 40. The annular gap or feed chamber 66 is formed between the two wall sections 56 and 65, which, during operation of the heating pump 26 when the impeller 45 is rotating, is filled with flushing solution and / or fish water F. The flushing solution and / or the fresh water F flows around the central axis 40 through the feed chamber 66 during the operation of the heating pump 26. This feed chamber is located upstream of the water diverter disc 72 in the direction of flow of the flushing solution and / or the fresh water F, i.e., in the operation of the heating pump, upstream of the water diverter disc 72, and downstream of the impeller chamber LR containing the impeller 45.in the delivery operation of the heating pump in the flow direction towards the impeller chamber LR, lies.

[0117] The heating pump 26 further comprises a heating element 67 for introducing heat Q into the flushing solution and / or the fresh water F. The heating element 67 is an electric heating element. The heating element 67 can be a tubular heating element or be described as such. The heating element 67 can be annular or segmentally annular, in particular segmentally circular, and can rotate at least partially around the central axis 40. The heating element 67 can be rotationally symmetrical about the central axis 40, at least partially. The heating element 67 is located below the feed chamber 66, preferably in the impeller chamber LR and / or in the 90° transition section or deflection section UL between the impeller chamber LR and the feed chamber 66, and is surrounded by flushing solution and / or fresh water F during operation of the heating pump 26.Viewed along the axial direction AX, the heating device 67 is at least sectionally at the level of the impeller 45, i.e. at least partially placed in at least approximately the same horizontal plane as the impeller 45.

[0118] The heating device 67 is associated with a plane of symmetry 68, with respect to which the heating device 67 is symmetrically constructed. The plane of symmetry 68 intersects the central axis 40 and is arranged perpendicular to it. The plane of symmetry 68 also intersects the impeller 45. Furthermore, the plane of symmetry 68 can also intersect the drive shaft 47. It runs at least approximately horizontally.

[0119] The heating device 67 preferably has a metallic outer casing, which is in particular filled with a compressed magnesium oxide filling. A heating element, for example in the form of a heating wire, is embedded in the magnesium oxide filling. The heating element can be spirally wound. The outer casing can in particular be made of stainless steel. Particularly preferably, the heating device 67 is not circular in cross-section, but at least partially, especially where it is exposed to rinsing liquor and / or fresh water, elliptical or oval. In this case as well, the heating device 67 is symmetrical about the plane of symmetry 68.

[0120] The heating element 67 is placed on spacer feet 69, 70, of which only two are shown in Figure 3. These are preferably provided on the lower housing part 42, in particular on its bottom section 55. Any number of spacer feet 69, 70 can be provided, which can be arranged evenly distributed around the central axis 40. The spacer feet 69, 70 can be made, for example, of metal, plastic, or ceramic. If the spacer feet 69, 70 are made of metal or ceramic, they can be received in pockets that are molded onto the lower housing part 42. The spacer feet 69, 70 can also be overmolded with a material from which the lower housing part 42 is made. The spacer feet 69, 70 prevent the heating element 67 from resting directly on the bottom section 55, so that a complete flow of cleaning solution and / or fresh water F around the heating element 67 is possible.

[0121] The fluid inlet 44 forms, in particular, the lowest point of the heating pump 26. This allows the cleaning solution and / or the fresh water F to drain completely from the heating pump 26 by gravity when the heating pump 26 is out of operation, i.e., when its impeller 45 is stationary or not being driven. This drainage of the cleaning solution and / or the fresh water F is indicated in Figure 3 by an arrow 71. The cleaning solution and / or the fresh water F can thus flow back from the impeller chamber and the feed channel, i.e., more generally, from the fluid delivery channel of the heating pump 26, via the fluid inlet 44 and the connecting channel 25 into the pump sump 16, by gravity. The heating pump 26 can therefore empty itself.

[0122] The water diverter disc 72, rotatable about the central axis 40, is arranged between the upper housing part 43, in particular the end plate 63, and the lower housing part 42. The water diverter disc 72 is part of the water diverter 27, which is shown in Figure 5 in a bottom view, i.e., looking from the fluid inlet 44 towards the fluid outlets 59, 60, 61, 62. The feed chamber 66 supplies the rinsing solution and / or the fresh water F to the water diverter disc 72.

[0123] The water diverter disc 72 is rotationally symmetrical about the central axis 40. The water diverter disc 72 has a central opening 73. The second receiving section 52 with the wall section 65 passes through the opening 73. The opening 73 is preferably circular. The water diverter disc 72 is thus annular. Furthermore, the water diverter disc 72 has several openings 74, 75, 76 in its annular surface. By means of the openings 74, 75, 76, the fluid outlets 59, 60, 61, 62 can be selectively blocked or opened for flushing solution and / or fresh water by rotating the water diverter disc 72 about the central axis 40. In Figure 3, for example, the fluid outlet 59 is released and the fluid outlet 62 is blocked, so that rinsing liquor and / or fresh water F can only flow out through the fluid outlet 59.

[0124] The openings 74, 75, 76 can be circular. The openings 74, 75, 76 can also be elongated. Using the elongated geometry, it is possible to open several of the fluid outlets 59, 60, 61, 62 simultaneously. The number of openings 74, 75, 76 can correspond to the number of fluid outlets 59, 60, 61, 62. However, this is not mandatory. Using the water diverter disc 72, the fluid outlets 59, 60, 61, 62 can be combined in any way.

[0125] To rotate the water diverter disc 72 about the central axis 40, a water diverter drive 77, for example comprising a drive motor 78, is provided as shown in Figure 5. The water diverter 27 thus has the previously described water diverter disc 72 and the water diverter drive 77. The water diverter drive 77 has a drive ring 79 coupled to the annular water diverter disc 72 and a worm shaft 80 for driving the drive ring 79. The drive ring 79 preferably surrounds the annular water diverter disc 72 concentrically from the outside. The axis of rotation of the drive ring 79 is preferably arranged along the central axis 40, i.e., the drive ring 79 can be driven to rotate about the central axis 40. In particular, the axis of rotation of the drive ring 79 coincides with the central axis 40 of the impeller.The drive motor 78 can preferably be a BLDC (brushless DC) motor or a permanent magnet synchronous motor that is electronically commutated. The drive motor 78 is housed in a drive housing 81. The drive motor 78 is located laterally and tangentially on the heating pump housing 41, in particular on the lower housing part 42. This drive motor 78 of the water diverter drive can in particular be designed as a wet rotor. The feed chamber 66 extends to the water diverter disc 72. The feed chamber 66 is rotationally symmetrical about the central axis 40. From approximately the 90° deflection section, where the radially outer region of the impeller chamber LR transitions into the feed chamber 66, which extends upwards parallel to the central axis, the outer wall section 56 and the inner wall section 65 of the feed chamber 66 run at least approximately parallel to each other up to its upper end section, which is equipped with the water diverter disc 72.This section of the feed chamber 66 is therefore preferably annular in shape. In this exemplary embodiment, the feed chamber 66 widens upstream of the water diverter disc 72 and distributes the rinsing solution and / or the fresh water F onto the water diverter disc 72. The outlet-side end section of the feed chamber 66 is thus widened compared to its upstream, i.e., upstream, section. This allows the annular water diverter disc 72, with its predetermined inner and outer diameters and predetermined dimensions of its openings 74, 75, 76, to be accommodated in the end section of the feed chamber 66. Alternatively, the feed chamber 66 can also be bounded along its entire longitudinal extent from bottom to top by parallel wall sections 65, 56 of the upper housing part 43 and the lower housing part 42.Its cross-sectional width (perpendicular to the central axis 40) is then at least approximately the same at every point along its height. Spatially, it is thus designed as a single annular cylinder. The water diverter 27 and / or the water diverter disc 72 is integrated into the outlet-side end region of the feed chamber 66. The fluid outlets 59, 60, 61, 62 open out of the feed chamber 66.

[0126] In the annular supply chamber 66, during operation of the heating pump 26, the cleaning solution and / or the fresh water F flows in a circular or spiral direction S (Figure 4) around the central axis 40 and through those fluid outlets 59, 60, 61, 62 which are opened by means of the water diverter 27, upwards along the axial direction AX to the corresponding supply lines 34, 35, 36 in order to supply the spray devices 28, 29, 30 with cleaning solution and / or fresh water F. The flow direction S can be oriented counterclockwise or clockwise.

[0127] The water diverter disc 72 is preferably mounted in the aforementioned drive ring 79 in such a way that the water diverter disc 72 can be driven via the drive ring 79. Furthermore, the water diverter disc 72 floats upwards towards the housing upper part 43 due to the flow and pressure of the flushing solution and / or the fresh water F, thus sealing the openings integrated in the housing upper part 43 for the fluid outlets 59, 60, 61, 62 as tightly as possible without requiring an additional elastomer seal.

[0128] Figure 6 shows a schematic top view of the bottom 7 of the wash tub 2 from a viewpoint assumed by a user operating the household dishwasher as intended. With the door 3 fully open, the user looks into the wash chamber 4 from front to back towards the rear wall 9 of the wash tub 2, i.e., in the depth direction x. Preferably, a receiving area 82, at least approximately circular, for receiving the filter system 17, particularly the flat filter 18, is formed around the bottom 7 of the wash tub 2 in a peripheral zone around its approximately circular opening or passage DB, especially on the upper side. Additionally or independently of this, the receiving area 82 can also be part of the pump sump 16, in particular the radially outer edge zone of its pump sump housing 92, which—as already described above—is preferably approximately circular in top view.In this exemplary embodiment, the surface sieve 18 covers the top surface of the pump sump housing 92, preferably over its entire surface, except for a rear recess 91 located in the area of ​​the twelve o'clock position and radially spaced from its central area 88, in particular a radially outer, edge-side recess, and a front opening SP located in the area of ​​the six o'clock position, as well as a central passage or opening 89 in the central area 88. The perforation of the surface sieve 18 is indicated schematically in Figure 6 by loops and / or small circles.

[0129] The recess 91 is, in particular, an annular segment-shaped cutout in the radially outer edge region of the surface sieve 18. In the recess 91, the connecting sections 94, 95, 96, which are assigned to the grouped fluid outlets 60, 61, 62 of the heating pump 26 on the upper side of the projection AK of the pump sump housing 92 and are integrally formed on the upper side of the projection AK, are arranged in an open and accessible manner. Preferably, they occupy a partial circular angle β of less than 90°. This corresponds to the partial circular angle α of the associated grouped fluid outlets 60, 61, 62 of the heating pump 26, which are aligned with them along the central axis 40 and are arranged below the projection AK of the pump sump 16.The preferably also perforated central area 88 of the surface sieve 18 is, in this exemplary embodiment, spatially considered, specifically designed as a partial truncated cone. In the front region, a radially outer segment of an annular sector is cut off at each point along its vertical extent y in a section plane defined by the vertical and horizontal directions z, symmetrically to the six o'clock position. This partial truncated cone is depicted in the top view of Figure 6 as an annulus, which, in the front region, symmetrically to the six o'clock position, lacks the outer segment of an annular sector. Alternatively, the central area 88 can, of course, also be designed as a complete truncated cone, i.e., viewed from the top, it then has an annular shape.In spatial terms, the partial or complete truncated cone of the central area 88 rises relative to a surrounding, at least approximately horizontal, portion of the surface sieve 18 in the direction of the centrally arranged axis of rotation 31 in the vertical direction y; it slopes radially outwards. The circular opening 89 is provided at its center. The axis of rotation 31 of the single spray device 28, in particular the lower, rotatable spray arm, runs through its center. Specifically, the connecting section 93 penetrates the opening 89 parallel to the central axis 40, projecting upwards from below. The supply line 34 of the single spray device 28, in particular the lower, rotatable spray arm, can be rotatably mounted in it.The central axis of the fluid outlet 59 and the central axis of the associated connection section 93 preferably coincide at least approximately with the axis of rotation 31 of the single spray device 28, in particular the lower, rotatable spray arm. This allows the heating pump 26 to supply flushing fluid and / or fresh water to the single spray device 28, in particular the lower, rotatable spray arm, with particularly low hydraulic resistance during operation.

[0130] Viewed from above in Figure 6, the central axis 40 of the impeller 45 is located at least approximately in the middle or halfway along the radial distance D, or the distance between the axis of rotation 31 of the single spray device 28 and a circular arc segment arranged on an imaginary circle K that is at least approximately diametrically opposite, i.e., at about 180°, on which the centers of the other fluid outlets 60, 61, 62 and their associated connection sections 94, 95, 96 are arranged close together, i.e., grouped together. This distance D corresponds, to a first approximation, in particular to the diameter of the water diverter disc 72 and / or the diameter of the preferably circular cylindrical heating pump housing 41.

[0131] Because the fluid outlets 60, 61, 62 and the connection sections 94, 95, 96 assigned to them as extensions on the upper side of the cantilever AK of the pump sump housing 92 are arranged approximately diametrically opposite the one fluid outlet 59 and the connection section 93 assigned to it, whose central axis is aligned with or coincides with the axis of rotation 31, a continuous zone DZ is formed on the upper side of the surface screen 18 between the one fluid outlet 59 and its associated connection section 93, which is arranged centrally in the surface screen, and the grouped fluid outlets 60, 61, 62 and their associated connection sections 94, 95, 96, through which a circumferential section of a cleaning area 97 runs at least approximately without interruption.In the embodiment shown in Figure 6, the continuous zone DZ, viewed from above, preferably has a geometric shape that is at least approximately an annular sector-shaped. In this embodiment, the cleaning area 97 completely surrounds the axis of rotation 31, thus forming a ring shape, in particular an annular shape with the axis of rotation 31 as its center. In this embodiment shown in Figure 6, it is bounded radially inwards by an annular transition zone of the central area 88, which rises in the y-direction from the at least approximately horizontal portion of the surface sieve 18, and radially outwards at least approximately by a circle on which the wall sides of the connecting sections 94, 95, 96 facing the central opening 89 are arranged.This cleaning area 97, which rotates around the axis of rotation 31 on the surface screen 18, can be generated in particular by at least one spray jet SJ (see Figure 2) from at least one screen cleaning nozzle RD, which is preferably provided on the exactly one spray device 28 rotatable about the axis of rotation 31, in particular on the lower spray arm rotatable about the axis of rotation 31, when the spray device 28 is driven in rotation during the delivery operation of the heating pump 26. When the spray device 28 is driven in rotation during the delivery operation of the heating pump, the spray jet SJ from the at least one screen cleaning nozzle RD pushes dirt particles lying on the surface screen 18 ahead of it in the direction of rotation of the spray device 28 until they are flushed into the opening SP which interacts fluidically with the annular cleaning area 97, in particular located at the front of the annular area 97 in the region of the six o'clock position.The opening SP is exclusively in fluidic contact with the raw area 20 of the downwardly projecting, shaft-shaped liquid collection section S16 of the pump sump 16.

[0132] In this embodiment, the opening SP is preferably designed as a slit-shaped gap that crosses at least partially in a radial direction a circumferential section of the annular cleaning area 97 located at the front in the area of ​​the six o'clock position, thus interrupting it only minimally there.

[0133] If, as in the embodiment shown in Figure 6, the slot-shaped opening SP is provided on the side of the one fluid outlet 59 or the fluid outlet or connection section 93 associated with it, facing away from the grouped fluid outlets 60, 61, 62 or the fluid outlets or connection sections 94, 95, 96, in front of it in the surface sieve 18, particularly at the six o'clock position, this allows a user to manually remove dirt residues such as hair or fibers that may clog the opening SP from the front, without having to reach too far into the washing chamber 4.

[0134] However, it may also be possible to position the opening SP at a different circumferential point of the cleaning area 97 than at the front in the six o'clock position. Furthermore, opening SP may have a geometric shape other than a slot.

[0135] The cleaning area 97 is thus designed as a 360° ring zone, closed except for the opening SP. During spray or recirculation operation, dirt particles deposited on the surface screen 18 are selectively flushed along this zone by the circulating spray jet SJ in the direction of rotation of the lower spray device 28 towards the opening SP in the surface screen 18. Through this opening, the dirt particles are flushed by the treatment fluid, or, to put it simply, the water (rinse liquor and / or fresh water) of the spray jet SJ, exclusively into the raw area 20 of the downward-projecting, shaft-shaped liquid collection section S16 of the pump sump 16 as a dirt load. From the raw area 20, the water containing the dirt load, which was selectively flushed in from the cleaning area 97, can be pumped out of the household dishwasher 1 by means of the drain pump 23.Since, during a pumping phase of the draining pump 23, water from the clean area 21 flows through the fine or separating filter 19 in the opposite direction to the flow direction through the separating filter 19 during a circulation phase of the heating pump 26, dirt particles can also be detached from the fine or separating filter 19, especially from the side facing away from the heating pump 26, i.e., on the side of the separating filter 19 facing the raw area 20, and removed from the household dishwasher 1. In this way, a self-cleaning filter system 17 is provided, eliminating the need for manual cleaning by a user. In the top view of Figure 6, the raw area 20 and the clean area 21 of the liquid collection section S16 of the pump sump 16 are additionally shown with dashed lines. The raw area 20 and the clean area 21 are represented by the fine area and the fine area, respectively, which are also indicated by dashes.Separating sieve 19 separates from each other.

[0136] The opening SP can be provided, in particular, in a separate, perforated insert element SD, which is preferably insertable into a front cutout 90 of the surface sieve 18, which is at least approximately diametrically opposite the rear cutout 91, and thus closes this front cutout 90. The front cutout 90 can preferably be axially symmetrical to the diameter of the surface sieve extending in the depth direction x or to the six o'clock position. Viewed from above, it can, as in the embodiment shown in Figure 6, in particular have the form of a circular sector segment, whose radially inwardly tapering zone precisely fills the recessed circular sector segment of the central area 88. In spatial terms, in the embodiment shown in Figure 6, it thus completes the front gap or...A recess in the central area 88 is formed such that a complete truncated cone is created in the central area of ​​the surface filter 18, which is concentrically surrounded by an annular cleaning area 97. This cleaning area can preferably be arranged horizontally in a plane at least approximately perpendicular to the central axis 40 and the axis of rotation 31, i.e., in this case, in particular, substantially horizontally. It is shown hatched in Figure 6.

[0137] It may also be advantageous if the insert element SD, viewed spatially, has in particular the form of a hood or cowl, which has an inlet window or opening open in the direction of rotation of the spray jet SJ, preferably in the circumferential direction or in a plane lying in the radial direction R and vertical direction y, through which the rinsing solution and / or fresh water can flow to the opening SP. The opening SP itself is covered from above by a roof curvature of the hood or cowl. The opening SP can preferably be provided in a flat sieve surface, which is arranged at least approximately in a plane perpendicular to the central axis 40 and the axis of rotation 31, within the hood or cowl and covered by its roof. This embodiment ensures that the accumulation or residue washed in front of it by the spray jet SJ during its rotation along the cleaning area 97 is removed.The SP opening reliably flushes away accumulated dirt particles. Furthermore, the accessibility of the SP opening is ensured under a variety of practical operating conditions in the household dishwasher. For example, this prevents items that fall out of the dish rack from remaining on top of the SP opening and blocking it.

[0138] Maintenance can be facilitated if the insert element SD can be manually removed from the recess 90 of the surface screen. In particular, the fine screen or separating screen can then also be removed for cleaning, and / or the shaft S16 of the pump sump 16 can be removed from it. The insert element SD and the fine screen 19 can also form a single unit. This unit can be removed as a whole from the pump sump housing 92.

[0139] The surface sieve 18 can in particular comprise a frame or a ribbed structure 83. This frame or structure can in particular be made of plastic, especially injection-molded. The central area 88 and the continuous annular segment zone or sector zone DZ between the exactly one fluid outlet 59 or its associated connection section 93 and the grouped fluid outlets 60, 61, 62 or their associated connection sections 94, 95, 96 can be formed by perforated sieve surface areas, preferably made of plastic, which are integrally formed on the frame or the ribbed structure 83.In the embodiment shown in Figure 6, the frame or rib structure 83 has a circular outer rib, which is interrupted by the rear recess 91 and the front recess 90, respectively, so that, viewed from front to back in the depth direction x, an outer, annular frame section 87 is arranged on the left and an outer, annular frame section 87' is arranged on the right. In this embodiment, several web sections 86 preferably extend radially inwards from the annular frame sections 87, 87'. The web sections 86 are preferably arranged circumferentially offset from one another by predetermined circumferential angles. They are integrally formed at their radially inner, end faces onto the central area 88.The rear recess 91 is bounded on the left side of the diameter of the pump sump housing 92 passing through the axis of rotation 31 by a left, radially extending web section 861, and on the right side of the diameter of the pump sump housing 92 passing through the axis of rotation 31 by a right, radially extending web section 862. The recess 91 is bounded radially inwards by an annular frame section 871, which is connected at its left end to the left-hand web element 861 and at its right end to the right-hand web element 862. Between the radially extending web elements 86, sector-shaped cutouts or windows are provided, each truncated radially inwards by a truncated cone portion, in which surface portions of a fluid-permeable filter element or several filter elements, such as 84 or 85, are accommodated.In the embodiment shown in Figure 6, the radially extending web elements 86 divide a first sieve element 84 into three windows of the left-hand frame section 87 and a second sieve element 85 into three windows of the right-hand frame section 87'. Of course, it is also possible to close each window with its own separately assigned fluid-permeable sieve element.

[0140] According to a further advantageous embodiment, which is also explained inter alia with reference to the top view of Figure 6, a receiving area 82 for receiving the sieve system 17, in particular the flat sieve 18, can be integrally formed on the bottom 7 of the rinsing tank. The receiving area 82 can be part of the pump sump 16. The flat sieve 18 has a frame 83 which, in this embodiment, carries two fluid-permeable sieve elements 84, 85. Their perforations are indicated schematically in Figure 6 by loops and / or small circles. In this further embodiment, the frame 83 preferably comprises several web sections 86, of which only one is provided with a reference numeral in Figure 6. The web sections 86 extend radially inwards from an annular frame section 87, 87' to a central section 88 which is conical or frustoconical in spatial terms.The central section 88 comprises a central, preferably circular, opening 89. The web sections 86 divide the sieve elements 84, 85, in this exemplary embodiment, preferably into several windows.

[0141] The frame 83 has an opening 90, particularly at the front, in which the fine screen 19 is preferably positioned in the y-direction as part of a partition or as a partition between the raw area 20 and the clean area 21. The frame 83, and in particular the frame sections 87, 87', have a cutout 91, particularly at the rear, which accommodates a portion of the pump sump housing 92, in particular a portion of its projection AK. The cutout 91, particularly at the rear, is arranged approximately 180° offset in the circumferential direction from the opening 90, in particular at the front. The respective frame section 87, 87' extends section by section, in particular annular section, around the pump sump housing 92. The pump sump housing 92 is at least partially covered by the surface screen 18.The pump sump housing 92 is connected to the heating pump 26, which is preferably arranged below its overhang AK, and in particular to its upper housing part 43, for example by screws. The pump sump housing 92 may optionally be part of the heating pump 26, in particular of the heating pump housing 41.

[0142] Alternatively, frame 83 can also support only a single sieve element.

[0143] The pump sump housing 92 has several fluid outlets 93, 94, 95, 96. Fluid outlet 93 is connected to fluid outlet 59. Fluid outlet 94 is connected to fluid outlet 60. Fluid outlet 95 is connected to fluid outlet 61. Fluid outlet 96 is connected to fluid outlet 62. For example, the fluid outlets 93, 94, 95, 96 are attached to the fluid outlets 59, 60, 61, 62 – in particular as aligned extensions. One or more sealing elements can be arranged between the fluid outlets 93, 94, 95, 96 and the fluid outlets 59, 60, 61, 62.

[0144] The heating pump 26 is arranged such that the fluid outlet 59, viewed along the y-direction y, is located directly below the fluid outlet 93. The spray device 28 can be associated with the fluid outlet 93. The spray device 28 can be rotatably mounted on the fluid outlet 93 about the axis of rotation 31. In this case, the supply line 34 is part of the spray device 28, which is designed, for example, as an under-basket spray arm. The fluid outlet 93 can pass through the opening 89. The supply lines 36, 35 can be connected to the fluid outlets 95, 96. As mentioned previously, the fluid outlet 60, and thus also the fluid outlet 94 associated with it, can be assigned to an intensive spray zone (not shown).

[0145] The fluid outlets 59, 60, 61, 62, and thus also the fluid outlets 93, 94, 95, 96, are arranged such that the fluid outlet 59 or the fluid outlet 93 for supplying the spray device 28 with rinsing solution and / or fresh water F is positioned directly below an inlet opening of the spray device 28. The other fluid outlets 94, 95, 96 are all grouped together, preferably arranged at least approximately diametrically opposite the fluid outlet 93. This group of fluid outlets 94, 95, 96 is located at an outer edge of the surface sieve 18. Preferably, the fluid outlets 94, 95, 96 are arranged on a partial circle angle β of less than 90° in a rear region of the rinsing container 2 and thus occupy the smallest possible cutout, i.e., the smallest possible recess 91 in the surface sieve 18. Their centers are located atThe central axis is closely adjacent to each other in the circumferential direction on a pitch circle swept out by the holes 74, 75, 76 of the water diverter disk 72 when it rotates about the central axis 40. The pitch circle angle β corresponds in particular to the pitch circle angle α.

[0146] Due to the aforementioned grouped positioning of the fluid outlets 94, 95, 96, a free, i.e., continuous or uninterrupted, cleaning zone 97 is created between the fluid outlet 93 and the group of fluid outlets 94, 95, 96, which are directly adjacent to each other in the circumferential direction, i.e., closely spaced at a partial circular angle α. This cleaning zone 97 is hatched in Figure 6. The cleaning zone 97 is annular, in particular circular, and can be used to clean the surface screen 18 with the aid of a cleaning nozzle arranged on the spray device 28. This allows dirt deposited on the surface screen 18 to be conveyed in a circular motion into the pump sump 16, in particular into its raw area 20. This ensures that coarse dirt particles are carried directly into the pump sump 16, in particular into its raw area 20, e.g.,The dirt can be conveyed via opening 90 (if no SD insert element is present) or via opening SP (if the SD insert element is present) without requiring chemical or mechanical processing. This functionality saves cleaning time, chemicals, and energy without compromising cleaning performance.

[0147] This geometric arrangement of the fluid outlets 93, 94, 95, 96 then generates a corresponding perforation in the form of the openings 74, 75, 76 in the water diverter disc 72 of the water diverter 27. In order to achieve the necessary distance between the fluid outlet 93 and the other fluid outlets 94, 95, 96 for the cleaning area 97, the water diverter disc 72 preferably has a diameter of at least 95 mm, more preferably a diameter of 100 mm to 130 mm. This results in the continuous cleaning area 97, along which the spray jet of the cleaning nozzle, in particular the lower spray device 28, can unhindered sweep dirt along its 360° rotation around the axis of rotation 31 and transport it, without being loosened by chemicals or the mechanics of the household dishwasher 1, e.g., via the opening 90 or the opening SP into the pump sump 16.

[0148] This enables the implementation of a self-cleaning sieve system 17. Program run times can be reduced. Savings in energy, fresh water, and chemicals are possible. A very compact design results. A reduced number of parts and thus lower complexity can be achieved. A reduced number of large pressurized seals and optimized assembly through a single vertical assembly movement are possible. Only one opening for the pump sump 16 in the base 7 of the rinsing tank 2 is required. Hydraulic losses are reduced. An optimized system efficiency of the hydraulic circuit 37 can be achieved.

[0149] Although the present invention has been described using exemplary embodiments, it can be modified in many ways.

Claims

PATENT CLAIMS 1. Household dishwasher (1) comprising a wash tub (2), a pump sump (16) attached to the wash tub (2), several spray devices (28, 29, 30) arranged within the wash tub (2) for spraying wash liquor and / or fresh water (F) onto items (39) held in the wash tub (2), a sieve system (17) which covers at least part of the pump sump (16), and a heating pump (26) for pumping the wash liquor and / or fresh water (F) from the pump sump (16) to the spray devices (28, 29, 30), wherein the heating pump (26) has a heating pump housing (41) with several fluid outlets (59, 60, 61, 62) which are in fluid communication with the spray devices (28, 29, 30), wherein a rotary axis (31) is connected to exactly one spray device (28) of the spray devices (28, 29, 30), in particular a lower, rotatably mounted spray arm, passes through exactly one fluid outlet (59) of the fluid outlets (59, 60, 61, 62),and wherein the axis of rotation (31) passes through the sieve system (17).

2. Household dishwasher according to claim 1, characterized in that the heating pump (26) has an impeller (45) arranged within the heating pump housing (41) for conveying the washing liquor and / or the fresh water (F) from a fluid inlet (44) of the heating pump housing (41) to the fluid outlets (59, 60, 61, 62), wherein the impeller (45) is rotatably mounted in the heating pump housing (41) about a central axis (40), in particular of the heating pump housing (41), and wherein the fluid inlet (44) and the fluid outlets (59, 60, 61, 62) extend along the central axis (40).

3. Household dishwasher according to claim 2, characterized in that the axis of rotation (31) and the central axis (40) are positioned parallel to each other and spaced apart from each other.

4. Household dishwasher according to at least one of claims 1 - 3, characterized in that a supply line (34) of the exactly one spray device (28) runs centrally through a surface sieve (18) of the sieve system (17).

5. Household dishwasher according to at least one of claims 1-4, characterized in that the fluid outlets (60, 61, 62) are grouped with the exception of the exactly one fluid outlet (59), wherein the exactly one fluid outlet (59) and the grouped fluid outlets (60, 61, 62) are arranged at least approximately diametrically opposite each other on the heating pump housing (41), so that a continuous zone (DZ) is formed on the upper side of the surface sieve (18) of the sieve system (17) between the exactly one fluid outlet (59) and the grouped fluid outlets (60, 61, 62), through which a circumferential section of a cleaning area (97) passes at least approximately without interruption.

6. Household dishwasher according to claim 5, characterized in that the cleaning area (97) is designed in an annular segment shape, in particular in a circular segment shape, or that the cleaning area (97) is designed in an annular shape, in particular in a circular shape, and revolves completely around the axis of rotation (31).

7. Household dishwasher according to claim 5 or claim 6, characterized in that the cleaning area (97), in particular the cleaning area (97) rotating around the axis of rotation (31) on the surface sieve (18), can be generated by at least one spray jet (SJ) of at least one sieve cleaning nozzle (RD), which is preferably provided on the exactly one spray device (28) rotatable about the axis of rotation (31), in particular on the lower spray arm rotatable about the axis of rotation (31).

8. Household dishwasher according to claim 7, characterized in that, that the cleaning area (97) forms a continuous ring section zone or ring zone along which dirt particles deposited on the surface sieve (18) can be flushed by the spray jet (SJ) to an opening (SP) in the surface sieve (18), through which the dirt particles can be flushed into a downwardly projecting, shaft-shaped liquid collection section (S16) of the pump sump (16), in particular into its raw area (20).

9. Household dishwasher according to claim 8, characterized in that the opening (SP) is designed as a slit-shaped gap which crosses at least partially at a circumferential point of the ring-shaped or annular cleaning area (97), in particular interrupting it at least partially in the radial direction (R).

10. Household dishwasher according to claim 8 or claim 9, characterized in that the opening (SP) is provided on the side of the exactly one fluid outlet (59) or the fluid outlet (93) associated with it, facing away from the grouped fluid outlets (60, 61, 62) or the fluid outlets (94, 95, 96) therein in front of it in the surface sieve (18).

11. Household dishwasher according to at least one of claims 5 - 10, characterized in that the grouped fluid outlets (60, 61 , 62) are arranged in a radially outer region of the pump sump (16) and / or the surface sieve (18) of the sieve system (17) opposite the fluid outlet (93) associated with exactly one fluid outlet (59) on the top of the pump sump (16).

12. Household dishwasher according to at least one of claims 5 - 11 , characterized in that the grouped fluid outlets (60, 61, 62) are located within a partial circle angle (a) of the heating pump housing (41) or within a partial circle angle (ß) of the pump sump housing (92) of less than 90°.

13. Household dishwasher according to at least one of claims 5-12, characterized in that the grouped fluid outlets (60, 61, 62) are located closer to a rear wall (9) of the wash container (2) than the exactly one fluid outlet (59), so that the grouped fluid outlets (60, 61, 62) are arranged between the exactly one fluid outlet (59) and the rear wall (9), wherein (when viewed from front to back into the wash chamber of the wash container (2)) the exactly one fluid outlet (59) is positioned in particular in a six o'clock position, and wherein the grouped fluid outlets (60, 61, 62) are positioned in particular in a twelve o'clock position.

14. Household dishwasher according to at least one of claims 5 - 13, characterized in that the grouped fluid outlets (60, 61, 62) and the exactly one fluid outlet (59) are arranged at least 20 mm to 120 mm, preferably 50 mm to 90 mm, apart from each other.

15. Household dishwasher according to at least one of claims 5 - 14, characterized in that the central axis (40) of the impeller (45) of the heating pump (26) is located at least approximately in the center of a circle (K) on which the center point (M59) of the exactly one fluid outlet (59), in particular of the rotatably mounted lower spray arm, and the centers (M60, M61, M62) of the grouped fluid outlets (60, 61 , 62) are arranged.

16. Household dishwasher according to at least one of claims 1 - 15, characterized in that the axis of rotation (31) of the exactly one fluid outlet (59) is arranged at least approximately in the center of a pump sump housing (92) that is circular in plan view.

17. Household dishwasher according to at least one of claims 1-16, characterized in that the heating pump (26) has a water diverter (27) partially or fully integrated into the heating pump housing (41) for supplying water with the aid of the water diverter- before (27) selected fluid outlets (59, 60, 61, 62) with flushing liquor and / or fresh water (F).

18. Household dishwasher according to claim 17, characterized in that the water diverter (27) has a water diverter disk (72) rotatably mounted about the central axis (40) of the impeller (45) in the heating pump housing (41), in particular annular in shape.

19. Household dishwasher according to claim 18, characterized in that the water diverter disc (72) has an outer diameter of greater than or equal to 95 mm, preferably between 105 mm and 130 mm.

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