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

Abstract

The invention relates to a domestic dishwasher (1) having a washing container (2) for receiving items (G) to be washed, a hydraulic circuit (33) for applying a washing liquid (F) to the items (G) to be washed, and a pump device (19) having a liquid supply channel (121) for circulating the washing liquid (F) in the hydraulic circuit (33), the pump device (19) having a central axis (20) oriented in a direction of gravity (g), the pump device (19) has a water separator (23) integrated in a housing (35) of the pump device (19) for selectively distributing the flushing fluid (F) to a plurality of fluid outlets (51, 52, 53, 54) of the pump device (19), and a plurality, in particular all, of the fluid outlets (51, 52, 53, 54) are oriented along the central axis (20).

Description

Technical Field

[0001] This invention relates to a household dishwasher. Background Technology

[0002] A household dishwasher has a rinsing container in which the items to be rinsed can be contained. A hydraulic circuit or circulation circuit is provided for applying rinsing fluid, i.e., so-called rinsing rinse and / or fresh water, to the items. This circuit includes a spray device and / or other liquid application unit within the rinsing chamber of the rinsing container, as well as the rinsing chamber itself. The spray device can be configured, for example, as a spray arm rotatably supported in or at the rinsing container. To supply rinsing fluid to the spray device and / or other liquid application unit, the hydraulic circuit of the household dishwasher has a circulation pump. The circulation pump is fluidly connected to a liquid collection area in and / or below the bottom region of the rinsing container, where the rinsing fluid introduced into the rinsing chamber by means of the spray device and / or other liquid application unit is collected by gravity. In particular, a pump pool is provided as the liquid collection area, preferably arranged below the bottom of the rinsing container, and in the pump pool, the rinsing fluid that has been sprayed or otherwise distributed onto the items in the rinsing chamber by means of the spray device and / or other liquid application unit is collected. The pump sump can be configured as a tank-shaped container, arranged below a penetration opening in the bottom wall of the rinsing container and connected in a liquid-tight manner to the edge of the bottom wall of the rinsing container surrounding the penetration opening. The penetration opening is preferably covered, especially at least partially, by a surface filter on its upper side. If necessary, one or more other filters, such as coarse and / or micro filters, can also be placed in the pump sump as part of a filtration system. The circulation pump is fluidly connected to the pump sump, particularly via a suction pipe or connecting channel. Preferably, during the rinsing operation of a household dishwasher, the circulation pump draws rinsing fluid from the liquid collection area, particularly the pump sump, and pumps the rinsing fluid directly to the spray devices and / or other liquid application units, and / or via a downstream distributor to a delivery line leading to the spray devices and / or other liquid application units. Thus, by means of a so-called distributor, which is another component of the hydraulic circuit, the rinsing fluid is distributed to at least a subset of the different spray devices and / or other liquid application units. With the aid of the distributor, the rinsing fluid delivered by the circulating pump can be selectively pumped to the delivery lines fluidly connected thereto, leading to the spray device and / or other liquid application unit. "Selective" means that, with the aid of the distributor, rinsing fluid can be applied individually, i.e., selectively, to the respective fluidly connected delivery lines leading to the corresponding spray device and / or corresponding liquid application unit (and all other delivery lines are blocked here), or rinsing fluid can be applied simultaneously to multiple or even all fluidly connected delivery lines leading to the spray device and / or other liquid application unit. In practice, to date, circulating pumps have typically been used for household dishwashers, wherein the motor shaft of its drive motor is usually arranged horizontally, and the motor shaft rotates to drive a rotor or impeller within the pump chamber of the circulating pump.To ensure that the rinsing fluid delivered by the circulation pump can be heated to a desired temperature when needed (i.e., for example, for the cleaning and / or rinsing steps of a dishwashing program), a heater can be integrated into the pump housing of the circulation pump. Alternatively, the heater can also be arranged separately from the pump housing, i.e., for example, downstream of the circulation pump and upstream of the distributor. Summary of the Invention

[0003] In this context, the object of the present invention is to provide an improved household dishwasher.

[0004] Therefore, a household dishwasher is proposed, comprising a rinsing container for holding the items to be rinsed, a hydraulic circuit or circulation circuit for applying rinsing fluid to the items, and a pump device for circulating the rinsing fluid in the hydraulic circuit. Here, the pump device has a central axis oriented along the direction of gravity, wherein the pump device has a distributor integrated into the housing of the pump device for selectively distributing rinsing rinse fluid and / or fresh water to a plurality of fluid outlets, and wherein at least one, preferably multiple, and particularly all of the fluid outlets are oriented along the central axis.

[0005] By integrating the distributor into the pump housing, an extremely compact pump configuration can be achieved. Furthermore, since at least one, preferably multiple, and especially all or all fluid outlets are oriented along the central axis, complete venting of the pump is feasible without any additional measures.

[0006] The rinsing container is preferably square. The rinsing container can be closed by means of a door or front door that pivotally stops at the rinsing container. The rinsing container can, for example, have multiple rinsing compartments, such as a lower basket, an upper basket, and a dish drawer. Rinsing items can be contained in the rinsing compartments, and rinsing fluid can be applied to the rinsing items by means of a hydraulic circuit. The rinsing fluid can be, in particular, so-called rinse rinse and / or fresh water. "Applying" can currently include, in particular, spraying or wetting the rinsing items. "Rinse rinse" can currently be understood as water to which, depending on the rinsing phase of the dishwashing process to be performed, detergent, rinsing agent, and / or dirt particles detached from the rinsing items are added.

[0007] The hydraulic circuit or circulation circuit preferably has multiple spray devices, for example in the form of spray arms and / or dense spray zones, and / or other liquid application units arranged within the rinsing chamber of the rinsing container. The spray devices and / or liquid application units are particularly capable of being rotatably configured within the rinsing container. The spray devices and / or other liquid application units are connected to the fluid outlet of the pumping equipment via a supply line. The pumping equipment here forms part of the hydraulic circuit.

[0008] The application of flushing fluid to a hydraulic circuit by a pump device currently specifically means that the pump device pumps the flushing fluid through the hydraulic circuit. The pump device is particularly a circulating pump, preferably a heating pump. Therefore, the pump device can also be called a circulating pump or a heating pump. The pump device is particularly preferably a compact heating pump, and thus can also be called a compact heating pump.

[0009] The pump device is designed to circulate the rinsing fluid in a hydraulic circuit including the rinsing container. Furthermore, the pump device can also be designed to introduce heat into the rinsing fluid. For this purpose, the pump device can have a heater within its housing. The pump device is preferably fluidly connected to the pump basin of a household dishwasher. Specifically, the pump device can be fixed to the pump basin of the household dishwasher. The pump device is preferably located below the bottom wall of the rinsing container within the base carrier of the household dishwasher.

[0010] The pump unit is preferably constructed substantially symmetrically with respect to its central axis. Here, "substantially" means that the components of the pump unit are constructed with rotational symmetry relative to the central axis, but this does not preclude the possibility that other components of the pump unit are not constructed with rotational symmetry relative to the central axis. The central axis is specifically oriented parallel to the direction of gravity.

[0011] Currently, orienting the central axis along or parallel to the direction of gravity specifically means that the central axis is tilted or deflected relative to the direction of gravity up to ±20°, preferably up to ±10°, more preferably up to ±5°, more preferably up to ±3°, and even more preferably up to ±1°. However, the central axis can also be precisely extended along the direction of gravity so that no tilting or deflection relative to the direction of gravity occurs. Depending on the installation, a suitable slight tilt or deflection can be selected.

[0012] According to a preferred embodiment, the distributor has a water distribution element housed within a housing and rotatable about a central axis, the water distribution element being used to selectively open and close the fluid outlet.

[0013] According to a preferred embodiment of the invention, viewed from bottom to top along the central axis, at successive height positions are provided: a pump inlet of the pump device; a pump chamber having an impeller rotatable at the pump chamber for conveying flushing fluid; a pressure and / or diffusion chamber arranged downstream of the pump chamber; a water distribution element in the upper end section of the pressure and / or diffusion chamber; and a plurality of fluid outlets. Here, the liquid conveying channel is understood as a cavity disposed in the housing of the pump device according to the invention, through which flushing fluid is filled and flows during the pumping operation. Due to this height-related sequence of the various functional sections of the liquid conveying channel of the pump device according to the invention, the flushing fluid flows from the pump inlet to the corresponding fluid outlet opening in the housing from bottom to top, opposite to the direction of gravity. This largely avoids deflection and / or reflection of the flushing fluid in the direction of gravity, i.e., in the opposite direction to its upward conveying direction. Therefore, backflow of the flushing fluid conveyed by the impeller along its upward flow path through the liquid conveying channel is largely avoided. Furthermore, the sequential arrangement of the functional sections of the liquid delivery channel is advantageous for the simple structure and associated ease of manufacture of the pump device according to the invention. Conversely, these functional sections can be easily disassembled for example during maintenance, making each important component of the pump device according to the invention readily accessible. Moreover, this sequence of the functional sections of the liquid delivery channel ensures that when the drive motor for the impeller is shut off and the impeller is stationary, the flushing fluid can flow completely downwards through the pump inlet solely by gravity. Here, for complete emptying of the liquid delivery channel, it is particularly advantageous to suitably position the pump inlet at the lowest point of the pump device according to the invention. This avoids residual water remaining in the liquid delivery channel of the housing of the pump device according to the invention when the impeller drive motor stops operating. Consequently, when switching the flushing tank from a sub-rinse step of the dishwashing process, such as a cleaning step, to a subsequent sub-rinse step, such as an intermediate rinsing step or a rinsing step, there is almost no or no so-called wastewater contamination and / or alkaline contamination. This is because, when switching rinsing tanks, the rinsing fluid for the corresponding sub-rinsing step can now flow out at least almost completely from the pumping device according to the invention and be removed from the hydraulic circuit, particularly by means of a drain pump from the pump pool, and new rinsing fluid, especially fresh water, is supplied to the hydraulic circuit for the next sub-rinsing step without mixing with stagnant or residual water from the previous sub-rinsing step. Thus, the rinsed material after rinsing has little or no stains caused by dirt particles, scale particles, etc., that is, the rinsing result is improved. In particular, the intermediate rinsing step, which is now located between the rinsing and rinsing steps, can now be performed with less fresh water, or even eliminated entirely, because it is no longer mandatory to rinse away residual or stagnant water mixed with dirt particles and / or detergent from the pumping device.

[0014] In particular, in the pump device according to the invention, the pump inlet or suction opening is centered with respect to the motor shaft, which is at least approximately vertically oriented, and the impeller concentrically attached to the motor shaft, by means of a central axis oriented along the direction of gravity and preferably corresponding to the axis of rotation of the motor shaft for the impeller, i.e., its suction direction extends at least approximately vertically from bottom to top. Thus, when the drive motor for the drive shaft of the impeller switches from its on state to its off state, the flushing fluid present in the liquid delivery channel, i.e., in the liquid guiding cavity of the housing, can flow out of the pump inlet particularly quickly and completely from top to bottom.

[0015] According to an advantageous improvement of the invention, the pump device has a liquid delivery channel with a fluid-guiding geometry at the wall boundary of the liquid delivery channel. This geometry guides the flushing fluid, at least downstream of the pump chamber, to rise continuously from bottom to top, particularly from the inlet opening of the pump inlet, to the outlet opening of the fluid outlet. The pump chamber is arranged downstream of the pump inlet of the pump device and houses an impeller for rotatably delivering the flushing fluid. The outlet opening can be opened by means of a distributor, particularly a distributor element, and can be filled with flushing fluid. This improves the hydraulic efficiency of the pump device according to the invention. Furthermore, when the drive motor associated with its impeller is turned off, the pump device can be emptied more effectively, particularly at least almost completely. Therefore, after the drive motor for the impeller is turned off, the areas within the housing of the pump device where the flushing fluid remains as stagnant or residual water, such as planar, horizontal surfaces or recesses, depressions, etc., are minimized or even nonexistent.

[0016] In particular, the pump device according to the invention delivers flushing fluid from the pump inlet, especially after exiting the pump chamber with the impeller, in a preferred direction substantially, i.e., at least generally parallel to the central axis, from bottom to top. In the housing of the pump device according to the invention, there are no lateral, horizontally arranged planes perpendicular to the central axis at or within the boundary walls of the liquid delivery passage, or there are no recesses of flushing fluid remaining there when the impeller drive motor stops. Therefore, air entrainment in the liquid delivery passage is at least almost entirely avoided when the impeller drive motor is engaged, i.e., when the pump device according to the invention is in delivery operation.

[0017] According to a preferred embodiment of the invention, the pump inlet, the pump chamber having an impeller rotatably disposed therein; a pressure and / or diffusion chamber; and / or a water distribution element in the upper section of the pressure and / or diffusion chamber (particularly widened in terms of its channel cross-section) are respectively arranged and configured with rotational symmetry relative to the central axis. This is advantageous because it ensures the lowest possible hydraulic resistance within the liquid delivery channel for the flushing fluid conveyed or pumped upwards by the impeller in the liquid delivery channel when the impeller is driven to rotate by a drive motor. The rotational symmetry of the functional sections or units of the pump device also simplifies its structure and design.

[0018] Suitably, the fluid outlets are configured in either a tubular or nozzle shape, and the outlet openings of these fluid outlets are particularly arranged at one or more of the highest points of the liquid delivery passage of the pump device, which extends from the pump inlet to the outlet opening of the fluid outlet. This optimizes the hydraulic efficiency of the pump device according to the invention. This is because the rotary-driven impeller delivers the flushing fluid from bottom to top through the pressure and / or diffusion chamber, continuing its upward-oriented forward motion parallel to the central axis through the fluid outlets, which are opened by means of water-dividing elements, with at least minimal change. Consequently, the hydraulic resistance of the flushing fluid as it flows from the pressure and / or diffusion chamber into the one or more fluid outlets opened by means of water-dividing elements remains lower or minimal, unlike in the fluid outlets radially outward away from the pressure and / or diffusion chamber. Furthermore, when the pump equipment is filled with flushing fluid via the pump inlet, which is fluidly connected to the pump sump through the fluid delivery channel (during both stopping and / or operation of the drive motor for the impeller) and / or during continuous operation of the drive motor, complete upward venting of the liquid delivery channel is ensured. This is achieved by the flushing fluid flowing upward through the pump equipment housing, completely filled with the fluid that is guided from the pump inlet to fluid outlets opened by means of a water distribution element, since there is no air cavity in the upper region of the pump equipment housing (e.g., accompanied by radially extending fluid outlets). The continuous and complete venting of the pump equipment according to the invention is highly advantageous for its optimal pumping and delivery operation. It always maintains full hydraulic efficiency. Furthermore, disruptive venting noise is avoided.

[0019] A key feature of the pump device according to the invention, configured as at least almost a "vertical rotor," is that when the liquid delivery passage of the pump device is filled with flushing fluid, air present in the housing therein is automatically discharged upwards by the rising flushing fluid level and can escape from the housing via an upwardly oriented, particularly protruding, fluid outlet. Here, the liquid delivery passage comprises, between the pump inlet and the correspondingly open fluid outlet, the pump chamber of the pump device according to the invention, with an impeller disposed therein, and a pressure and / or diffusion chamber arranged downstream. Especially when the cavity of the liquid delivery passage is completely filled with flushing fluid, all air is discharged upwards from the liquid delivery passage, i.e., from the liquid-guiding cavity of the housing of the pump device according to the invention. Here, when the pump device is filled with flushing fluid, the motor shaft with the impeller can also be stationary, i.e., the drive motor for the shaft is turned off. During the commissioning or startup of the drive motor, and / or of course during the continuous delivery operation of the pump device according to the invention, any air bubbles present in the liquid delivery channel of the housing are transferred or carried by the upward-flowing flushing fluid and are always reliably expelled from the housing of the pump device according to the invention via the upward-oriented fluid outlet, wherein the pump device then pumps the flushing fluid from bottom to top against the direction of gravity by means of a impeller or wheel in its pump chamber.

[0020] In contrast, in the case of a radial pump with a horizontally aligned central axis, its pump inlet or suction opening is centered relative to the horizontally arranged motor shaft with impeller, i.e., its suction direction extends horizontally. Thus, when the radial pump is stationary and horizontally arranged, i.e., when its drive motor is off and the motor shaft with impeller is stationary, the residual flushing fluid at the bottom of the pump chamber acts as stagnant water at a level lower than the lower edge or lower ridge of the suction opening. Above this residual water, air exists in the pump chamber of the horizontally arranged radial pump casing. This air is drawn radially inward toward the central region of the rotation axis of the impeller attached to the motor shaft at the end side when the radial pump restarts, while the flushing fluid placed on the rotating impeller is radially thrown outward by the centrifugal force acting upon it due to its greater mass. Therefore, bubbles are formed in the central region of the pump chamber, confirmed by the rotation axis of the impeller or its hypothetical extension, and these bubbles are radially surrounded by the flushing fluid. In order to remove the air bubble via the radial outlet of the radial pump, a diffusion element is provided in the downstream pressure chamber of the pump chamber itself, namely, a fixed guide vane having a preferred helical blade section.

[0021] In the pump device according to the invention, air can always be discharged completely upwards from the pump housing via a fluid outlet oriented along the central axis, preferably vertically projecting, thus ensuring complete ventilation of the pump housing according to the invention at all times. Here, the pump device can operate without guide vanes, saving on components.

[0022] The housing of the pump unit is preferably constructed in multiple parts. For example, the housing can have a lower housing component, an upper housing component, and an inner housing component. The lower housing component, the upper housing component, and / or the inner housing component can be plastic components, particularly injection-molded plastic components. This allows for cost-effective manufacturing of the pump unit. The lower housing component, the upper housing component, and / or the inner housing component can be connected to each other in a form-fitting manner. Form-fitting connections are formed by two components engaging into each other or engaging each other from the rear. Locking hooks, latches, etc., can be provided to establish the form-fitting connection.

[0023] Currently, "integrating" the distributor into the housing specifically means that the distributor is at least partially housed within the housing. However, it is feasible in this case that the housing is at least partially part of the distributor. For example, the aforementioned internal and external components of the housing are at least partially part of the distributor. Therefore, the distributor and the pump unit are not spatially separated.

[0024] The use of a water distributor allows for the selective distribution of rinsing fluid, i.e., rinsing rinse fluid and / or fresh water, to different fluid outlets. Here, it is possible to selectively block or open selected fluid outlets. That is, to individually, i.e., selectively block, open, or open a corresponding fluid outlet, or simultaneously or jointly block, lock, open, or open multiple, i.e., at least two fluid outlets. For this purpose, a water distribution element rotatably supported in the housing is preferably provided. As mentioned above, at least a subset of the fluid is fluidly connected to the spray device and / or other fluid application unit. Therefore, the use of a water distributor allows for the targeted application of rinsing fluid to each spray device and / or other fluid application unit. Furthermore, it is also possible to simultaneously apply rinsing fluid, i.e., rinsing rinse fluid and / or fresh water, to all spray devices and / or other liquid application units.

[0025] The fluid outlet is preferably tubular or nozzle-shaped. The fluid outlet can particularly be part of a distributor. Here, the fluid outlet can particularly have a circular, elliptical, or annular cross-section. The fluid outlet being "oriented" along the central axis currently specifically means that the fluid outlet extends out of the housing along the central axis or axial direction of the pump unit. Here, the axial direction is parallel to or coincides with the central axis. The corresponding fluid outlet is oriented along the central axis. In particular, the fluid outlet is oriented upwards. Preferably, the fluid outlet projects upwards at least almost vertically.

[0026] The pump equipment is arranged radially, particularly perpendicular to the central axis or perpendicular to the axial direction. Preferably, the pump equipment has multiple fluid outlets leading to the spray device and / or other liquid application unit, particularly all fluid outlets extending along or along the central axis, wherein the through-holes of the pump equipment for flushing fluid or rinsing rinse fluid can be controlled or regulated by means of a distributor, particularly partially or completely opened and / or closed. If necessary, in addition to these one or more fluid outlets extending parallel to the central axis, the pump equipment can also have one or more fluid outlets oriented transversely to the central axis, particularly perpendicular to the central axis and thus radially.

[0027] According to an advantageous improvement of the invention, the water-distributing element, when viewed from above in a top plan, is arranged at least approximately in a storage plane perpendicular to the central axis, i.e., at least approximately horizontal, and is preferably at least approximately circular. Here, the water-distributing element has a plurality of through holes or through openings in the axial direction, particularly in the vertical direction, between its inner and outer circular edges, wherein the outer circular edge and the inner circular edge are arranged concentrically outward at a certain radial spacing. These through holes or through openings allow for the targeted opening of one or more fluid outlets or all fluid outlets. For this purpose, the water-distributing element is rotated such that the through holes of the water-distributing element are upstream of the corresponding fluid outlet to be opened. To lock or close one or more fluid outlets or all fluid outlets, the water-distributing element is rotated such that its closed wall components cover the inlet openings of the multiple or all fluid outlets on the upstream side.

[0028] According to another embodiment, the water-dividing element has an annular disk and a drive ring for driving the annular disk. Therefore, the water-dividing element consists of two parts. Here, the drive ring is suitably coupled to the annular disk in a force-transmitting manner, causing the annular disk to rotate in its rotational direction.

[0029] The annular disc is preferably positioned above the drive ring, particularly when the pump is emptied of flushing fluid. The annular disc rests flat on the drive ring and is mechanically coupled to it circumferentially. Spatially, the drive ring, except for its outer teeth, can approximate the shape of a thin-walled annular cylinder with a small height extension and radial wall thickness. The outer teeth of the drive ring are located below the upper annular end face of the annular body at the outer surface of the annular cylinder. This end face is used to preferably place the annular disc of the water distribution element flat in a plane perpendicular to the central axis, and particularly at least at least horizontally. The central axis of the pump according to the invention extends through its center. When, for example, the pump is emptied of flushing fluid and / or the impeller is stationary, the annular disc can rest flat on the wall of the upper end side of the drive ring. In particular, the outer diameter of the annular disc is at least approximately corresponding to or slightly smaller than the outer diameter of the drive ring. In particular, the inner diameter of the annular disc is twice the pre-determined radial projection width smaller than the inner diameter of the drive ring. Therefore, the annular disk protrudes from the cylindrical inner surface of the drive ring with a radially inwardly projecting annular wall portion, in which the aforementioned through hole of the water-distributing element is provided.

[0030] The aforementioned through-hole of the water distribution element is preferably located at the annular disk. The drive ring preferably has teeth, particularly external teeth, to drive the drive ring. This drive ring is specifically configured as an annular toothed ring.

[0031] The drive ring preferably includes one or more driving members to establish a coupling or connection between the drive ring and the annular disk for force transmission as the drive ring rotates in its respective direction of rotation. This driving member preferably extends outward, particularly upward, from the upward-facing end of the drive ring on its upper side. The driving member is specifically designed to engage in a recess provided on the annular disk, particularly, for example, at its outer edge, such that the drive ring and the annular disk are coupled in a force-transmitting manner along their respective directions of rotation. The recess in the annular disk for engaging the driving member of the drive ring can be, in particular, a through-hole extending upward, preferably perpendicular to the plane of the annular disk, but it can also be a blind hole provided on the lower side of the annular disk associated with the upper side of the drive ring.

[0032] The driving components are preferably arranged around the central axis in a manner distributed on the upper end face of the drive ring, allowing for coding during the assembly of the annular disc and drive ring. This coding prevents incorrect assembly of the distribution plate (Poka Yoke). Viewed along the central axis or axially, the annular disc can be lifted from the drive ring, allowing it to float on the flushing fluid during pump operation. However, a connection or coupling is achieved between the drive ring and the annular disc in the corresponding rotational direction of the drive ring. The floating of the annular disc allows it to press against the flat end plate of the internal components of the housing, reliably sealing the fluid outlet that should be closed.

[0033] Specifically, the drive member of the drive ring is positioned with a certain gap in the void associated with the drive member in the annular disk, such that during the pumping operation, the annular disk can be pushed upwards and floated by the flushing fluid being conveyed from bottom to top until the annular disk presses against the preferably flat end plate of the housing component or against a defining element protruding downwards from the end plate in the pressure / diffusion chamber, so as to reliably seal the fluid outlet that should be closed. However, here, the corresponding drive member remains engaged with the void associated with it in the annular disk. For this purpose, the drive member particularly abuts against a portion of the boundary wall of its associated void along the length of which the drive member moves toward the boundary wall when the drive ring is rotated in its respective direction of rotation.

[0034] In particular, when the level of flushing fluid in the pressure and / or diffusion chamber is lower than the upper end face of the drive ring, especially when the drive motor of the delivery pump of the pump device according to the invention is cut off and the flushing fluid flows down from the housing of the pump device through the pump inlet into the liquid delivery channel, the annular disc is positioned above the upper end face of the drive ring.

[0035] Preferably, the corresponding actuating element protrudes from the upper side of the drive ring in a height extension in the vertical or axial direction (along the central axis), which is greater than the maximum floating or lifting distance of the annular disk in the height direction. This ensures that the corresponding actuating element of the drive ring always overlaps the boundary wall at least for a portion of its height extension in the void associated with the actuating element of the annular disk. The maximum floating distance is intended to correspond to the free height gap between the height position of the upper side of the annular disk (when the annular disk is placed flat on the upper end face of the drive ring in contact) and the height position of the lower side of the end plate, wherein the end plate is preferably part of the housing internal components and covers the annular outlet opening of the upper section of the pressure and / or diffusion chamber—preferably widened in terms of the cross-sectional width of the outlet opening—and particularly has a fluid outlet oriented upward along the central axis, or at least one defining element that is attached downwardly to the lower side of the end plate. Therefore, even when the annular disk floats upwards, the driving element of the drive ring remains engaged with the annular disk. In other words, even when the annular disk floats, the coupling between the drive ring and the annular disk remains along the rotation direction of the drive ring. Thus, even when the annular disk floats, the rotation of the drive ring allows the annular disk to rotate in the circumferential direction, i.e., clockwise and counterclockwise.

[0036] The drive ring suitably has a flat upper or end face in its at least generally horizontal position plane, such that when the flushing fluid level is below the height of the upper end face of the drive ring, for example when the drive motor of the delivery pump is turned off and the flushing fluid has flowed downwards from the pressure and / or diffusion chamber and the empirical pump inlet in the pump chamber, the annular disc can be positioned at a defined reference location. This reference location of the annular disc largely ensures that when the drive motor of the delivery pump is turned on, the annular disc can float without significant tilting due to the upward compression of the delivered flushing fluid. The teeth of the drive ring are specifically positioned below the flat support or mounting surface on the upper side at the radially outwardly acting wall of the drive ring.

[0037] According to another embodiment, the drive ring is housed in an annular groove, particularly a cylindrical annular groove, provided in the housing. Preferably, the annular groove extends vertically upwards parallel to the central axis and opens from the top for insertion. Therefore, during pump assembly, the drive ring can be inserted into the annular groove from above, or during pump disassembly, the drive ring can be removed upwards from the annular groove. Preferably, the annular groove is molded into the upper end section of the cylindrical wall of the housing component.

[0038] The annular groove is preferably molded onto the housing components, particularly at its upper, generally cylindrical end section. When the pressure and / or diffusion chamber is completely filled with flushing fluid, the annular groove is filled with flushing floats and / or fresh water. The drive ring is located within the annular groove. The annular groove completely surrounds the central axis of the pump unit.

[0039] According to another embodiment, the housing has a drain opening facing the central axis, which is fluidly connected to an annular groove.

[0040] It is possible to have exactly one drain opening. However, it is also possible to have multiple drain openings. The flushing fluid can flow out of the annular groove through the drain opening. The "fluid connection" between the drain opening and the annular groove currently specifically means that the flushing fluid can flow from the annular groove along the central axis into the pressure and / or diffusion chamber through the drain opening.

[0041] According to another embodiment, the drive ring is rotatably supported on guide plates that extend radially into the annular groove. Here, the guide plates are preferably located in the radially recessed wall of the annular groove. The guide plates extend radially outward into the annular groove, i.e., they protrude into the annular groove when viewed radially, and each forms a support point for the inner edge of the drive ring. When the drive ring rotates to the desired rotational position, the guide plates hold the drive ring in a defined orientation position, preferably relative to the central axis of the pump device as its predetermined axis of rotation. The guide plates, when viewed perpendicularly to the central axis in a cross-sectional plane, are preferably formed in annular segments. Between each pair of guide plates viewed circumferentially, there is a radial gap or radial clearance between the drive ring and the radially recessed wall of the annular groove. In this way, when the drive ring rotates, it only rubs along the guide plates segmented in the circumferential direction, which helps reduce friction between the drive ring and the annular groove. Therefore, friction is reduced when the drive ring rotates. The number of guide plates is arbitrary. However, it is preferable to have at least three guide plates. However, it is also possible to have four or more guide plates.

[0042] According to one variant embodiment, it may be advantageous if necessary that one or more driving members are disposed at the annular disk, and the empty portion allocated to the driving member is disposed at the drive ring. The above-described two-part variant embodiment of the water distribution element is correspondingly applied to a variant embodiment in which one or more driving members are located at the drive ring, and the empty portion allocated to the driving member is located at the annular disk.

[0043] As an alternative to the aforementioned two-part variation of the water distribution element, the drive ring and the annular disc are configured as two components that can be coupled to each other in the direction of rotation and move away from each other in the height direction or along the central axis. According to an advantageous variation, the drive ring and the annular disc can be fixedly connected to each other to form a single unit, or designed, in particular, molded as a common unit. The drive ring and the annular disc can be formed, in particular, as a common, preferably one-piece, and preferably uniformly made component. When the pump is in delivery mode, the drive ring and the annular disc float together as a whole.

[0044] According to another embodiment, the distributor has a distributor driver for driving the drive ring, wherein the drive shaft of the distributor driver is oriented transversely to, and particularly perpendicularly to, the central axis. Currently, "perpendicular" can be understood as an angle of 90°±10°, preferably 90°±5°, more preferably 90°±3°, even more preferably 90°±1°, and even more preferably exactly 90°. The distributor driver has an electric motor. The distributor driver is preferably a so-called wet rotor driver. Preferably, the motor shaft of the distributor driver's drive motor and the rotor fixed therein are located in the wet space of the housing, which is fluidly connected to the pressure and / or diffusion chamber, and thus the housing is also filled with flushing fluid when the pump chamber and the pressure and / or diffusion chamber are filled with flushing fluid via the pump inlet, particularly for example, during the pumping operation of the pump equipment. Preferably, the distributor driver can include a first housing component, particularly tubular, which is molded to a housing component of the pump equipment housing. There is a fluid connection to the upper region of the pressure and / or diffusion chamber, particularly to the annular groove into which the drive ring is inserted. Suitably, especially the tubular second housing component, can be connected to the first housing component, preferably as an extension thereof, particularly by locking or snapping, wherein the second housing component covers the first housing component. The two housing components enclose an internal space that is filled with flushing fluid when the pump is fully filled, particularly during pump operation. The distributor drive also includes, in particular, a stator attached externally to the second housing component and a rotor rotatable relative to the stator, the rotor being arranged within the fluid-filled internal space of the second housing component. The rotor is torsionally connected to the drive shaft or motor shaft of the distributor drive motor, which is rotatably supported at the two housing components. A worm gear is attached to the drive shaft (preferably at its end section opposite the rotor), the worm gear engaging the teeth, particularly the external teeth, of the drive ring to form a meshing area. Specifically, in the meshing zone, located between the worm and teeth, particularly the outer teeth, of the drive ring, the radial outer wall of the annular groove is omitted or blocked. The teeth of the drive ring and the worm can, in particular, have spherical teeth. The internal space of the distributor actuator is preferably able to drain water towards the central axis via the annular groove and drain opening, in which the drive ring is housed.

[0045] In particular, it is especially advantageous for a drive ring with external teeth to have the following characteristics: the section of the drive shaft, especially the end section opposite to the drive motor of the distributor drive, is at least substantially tangentially abutting the external teeth of the drive ring to form a meshing area between the external teeth of the drive ring and the transmission worm, in which the external teeth and the transmission worm mesh together.

[0046] In particular, it is advantageous for a drive ring with external teeth (the worm gear geometry of the distributor actuator forms an external engagement area at the external teeth) to have one or more guide plates arranged radially outward on the side of the drive ring opposite the external engagement area when viewed radially, within the housing components, especially within the radially built-in wall of the annular groove. When the worm gear of the distributor actuator engages with the external teeth of the drive ring, the guide plate acts as a support for the drive ring. This is because the guide plate supports the inner edge of the drive ring from the inside. This is particularly advantageous if the drive ring has radial clearance in the annular groove. Specifically, for the engagement area between the external teeth of the drive ring and the worm gear engaging in the external teeth, one guide plate is arranged symmetrically with respect to its center or both sides of the engagement area, from the housing components, especially from the radially built-in wall of the annular groove, radially outward, protruding into the annular groove and abutting against the inner edge of the drive ring. This largely avoids the drive ring from radially inward when the worm engages in its external teeth and / or elsewhere. Therefore, it ensures perfect force transmission from the worm to the drive ring in the tangential direction, enabling efficient rotation of the drive ring via the worm.

[0047] According to another embodiment, the pump device has a drive motor having a rotor and a stator for driving an impeller of the pump device, wherein the rotor is housed in a first receiving section of the housing, and wherein the stator is housed in a second receiving section of the housing.

[0048] Preferably, the first and second receiving sections are part of the internal components of the housing. The first receiving section is preferably canister-shaped and closed by means of a closure towards the pump chamber and the impeller there. The first receiving section surrounds a receiving space in which the rotor is housed. The rotor is torsionally connected to the drive shaft or motor shaft of the drive motor. Similarly, the impeller is also torsionally connected to the drive shaft, preferably at its end section opposite the rotor, which extends downward into the pump chamber along the central axis. The drive shaft is preferably rotatably supported at the first receiving section and, if necessary, rotatably supported at the closure. The second receiving section is also preferably canister-shaped. Here, the first and second receiving sections are arranged opposite to each other, such that the second receiving section is open away from the impeller. The second receiving section is arranged radially at a certain distance from the first receiving section and concentrically surrounds the first receiving section, such that, viewed in a cross-sectional view perpendicular to the central axis, an annular receiving space is formed between the first and second receiving sections. Spatially, this receiving space is cylindrically annular. This receiving space can be accessed from above. The stator of the drive motor can be easily inserted into the receiving space from above. Therefore, the second receiving section surrounds the preferably annular cylindrical receiving space, in which the preferably annular cylindrical stator of the drive motor is received. For example, the stator can be glued to, or otherwise positioned and fixed in the receiving space between the first and second receiving sections.

[0049] According to an advantageous embodiment, the first receiving section is therefore arranged within the second receiving section.

[0050] Preferably, the first receiving section and the second receiving section are constructed in a rotationally symmetrical manner with respect to the central axis of the pump equipment, wherein the first receiving section is arranged inside the second receiving section, or the second receiving section is arranged outside the first receiving section.

[0051] According to another preferred embodiment, the second receiving section is guided through the water distribution element, particularly through the annular disk of the water distribution element.

[0052] In particular, the second receiving section can also serve as a support for the water distribution element. The second receiving section particularly guides the drive ring and annular disk through the water distribution element. The second receiving section preferably passes through the central opening of the water distribution element, and especially through the annular disk and drive ring. In other words, the water distribution element, particularly the annular disk and drive ring of the water distribution element, surrounds the second receiving section externally.

[0053] According to another preferred embodiment, a pressure and / or diffusion chamber is formed within the housing. Viewed radially along the pump device, the radial interior of this pressure and / or diffusion chamber is defined by a second receiving section, and the radial exterior is defined by a tubular heating element surrounding the second receiving section. Spatially, the tubular heating element surrounds at least one axially oriented, particularly annular cylindrical, tubular section of the second receiving section, particularly at least substantially concentrically with a predetermined radial spacing. Thus, at least a longitudinal section of the pressure and / or diffusion chamber is annularly formed in a cross-sectional plane perpendicular to the central axis, and spatially, particularly at least substantially annular cylindrical, wherein this longitudinal section is formed between a axially oriented, particularly at least substantially vertically extending wall section of the second receiving section and a tubular heating element arranged radially outward, particularly at least substantially concentrically. Therefore, a small amount of flushing fluid is sufficient to effectively heat the pump device to the desired temperature by means of the tubular heating element. This is because, in the annular (particularly annular cylindrical) gap space between the radially outer tubular heating element oriented along the central axis and the wall section of the second receiving section oriented along the central axis and radially inner relative to the tubular heating element, a rotating flow generated by the impeller arranged in the pump chamber by the conveyed flushing fluid moves from bottom to top (in the axial direction). This causes a force transmission, at least over a large area uniform, from the tubular heating element to the flushing fluid, extending longitudinally (parallel to the central axis) in the circumferential direction. When the impeller arranged in the pump chamber is driven to rotate by means of the motor shaft of the drive motor, the liquid in the pump chamber is also placed in rotation. A rotating or circulating flow of flushing fluid is generated in the radially outer region of the pump chamber or impeller chamber, which moves from bottom to top forward along the central axis (in the axial direction) of the pump device according to the invention through a pressure and / or diffusion chamber arranged annularly (viewed in a cross-sectional plane perpendicular to the central axis) downstream of the pump chamber, which is spatially observed, especially at least in sections, in annular cylindrical form.

[0054] In particular, the pressure and / or diffusion chamber extends at least along the entire height of the drive motor stator. Thus, the waste heat of the entire stator can be transferred via a particularly vertical separation wall parallel to the central axis of the second receiving section of the housing to the flushing fluid flowing through the pressure and / or diffusion chamber, which further improves the energy efficiency of the pump device according to the invention.

[0055] According to an advantageous improvement of the invention, the pressure and / or diffusion chamber has an upward outlet opening at its upper end with respect to the end section through which its cross-section is particularly widened. The water distribution element, in particular its annular disc, at least partially covers from above the annular, particularly circular, outlet opening of the particularly widened, annular, spatially at least at least generally annular cylindrical upper section of the pressure and / or diffusion chamber, which is arranged in a plane perpendicular to the central axis, particularly in a plane at least generally horizontal, and oriented upward. Here, the annular, particularly circular, outlet opening of the pressure and / or diffusion chamber is preferably positioned above the top wall of the first receiving section of the housing.

[0056] In summary, this specifically means that the flushing fluid comes into direct contact with the tubular heating element when flowing through the pressure and / or diffusion chamber. The tubular heating element is tubular or hollow cylindrical. The tubular heating element is particularly a thick-layer heating element. The pressure and / or diffusion chamber begins in the pump or impeller chamber of the pumping equipment and extends toward its distributor, particularly its distributor element. Here, viewed in a cross-sectional plane perpendicular to the central axis, the impeller chamber is preferably disc-shaped, while the pressure and / or diffusion chamber, where the fluid is arranged downstream of the impeller chamber, is annularly, particularly circularly, formed in the region of the tubular heating element and the second receiving section. Therefore, spatially, the pressure and / or diffusion chamber is preferably annularly cylindrical, particularly at least at the location where the tubular heating element, which serves as the outer boundary wall, is associated. If necessary, the pressure and / or diffusion chamber can be widened in its upper section toward the distributor of the pumping equipment to provide the required outer and inner diameters of the annular disc of the distributor element, and thus the desired radial width of the annular disc. This may be necessary so that one or more through-holes in the annular disk to be circulated with flushing fluid can each have the required radial extension, which at least substantially matches the corresponding radial extension of one or more fluid outlets. In particular, the radial extension or width of the corresponding through-hole corresponds to the radial extension or radial width of the inlet opening of the corresponding fluid outlet assigned to the through-hole.

[0057] According to another advantageous embodiment, the housing has a lower housing component and an upper housing component, wherein, viewed along the central axis, a tubular heating element is arranged between the lower housing component and the upper housing component.

[0058] The tubular heating element is preferably sealed relative to the lower part of the housing by means of a sealing device. A sealing element, such as an O-ring, can also be provided to seal the tubular heating element relative to the upper part of the housing.

[0059] According to another advantageous embodiment, the liquid delivery channel can widen from the pump inlet toward the distributor. This can be understood in particular as the through-section of the liquid delivery channel increasing from the pump inlet toward the distributor, especially the distributor element.

[0060] Specifically, viewed along the delivery direction, the upper section of the pressure and / or diffusion chamber of the liquid delivery channel is widened relative to the section of the front portion arranged below or lower on one or more upstream sides. Specifically, viewed along the axial direction, the pressure and / or diffusion chamber widens again in the upper section after encountering the tubular heating element, in the region of the distributor, particularly the distributor element, where the through-section of the pressure and / or diffusion chamber is larger than the through-section of the section in front or lower on its upstream side, which in particular includes the tubular heating element as a radially outer boundary wall.

[0061] According to an advantageous improvement, a deflection section for flushing fluid is provided between the bottom of the pump chamber, which extends particularly at least horizontally, and the lower end section of the pressure and / or diffusion chamber, which extends east-west, particularly at least at least vertically upward. This deflection section is designed to deflect the flushing fluid, which originates from the pump chamber, which is arranged particularly at least horizontally, in a radial direction upward in the axial direction. The deflection section begins in the radially outer region of the bottom of the pump chamber, extending particularly in a crescent-shaped concave upward, and its upper end section abuts against or merges into the upright, particularly at least at least vertical, inner wall surface of the lower section of the pressure and / or diffusion chamber. This means that the deflection section advantageously forms a negative (concave) fillet with an edge, particularly at least at least 90°, between the bottom section of the housing or the bottom section of the pump chamber, which extends particularly at least at least horizontally, and the outer wall of the upwardly, preferably at least at least at least vertically, pressure and / or diffusion chamber. Therefore, reflection and / or turbulence of the flushing fluid flow are largely avoided in the transition region between the bottom of the pump chamber and the upward, particularly at least generally vertically upward, outer wall portion of the lower section of the pressure and / or diffusion chamber. The flushing fluid flow is prevented from detaching from the outer wall boundary of the transition zone in the fluid flow passage, located between the pump chamber extending transversely, particularly at least at least perpendicularly to the central axis, and the upwardly oriented, particularly at least at least generally vertically upward, outer wall portion of the lower end of the pressure and / or diffusion chamber, arranged downstream of the pump chamber in the delivery direction. This optimizes the hydraulic efficiency of the pump's delivery operation, reduces the dead volume of the pump, and reduces or minimizes the residue or accumulation of flushing fluid within the pump when the pump is shut off and the flushing fluid flows back to the pump inlet under its own gravity and exits from the pump inlet. Therefore, it helps improve the emptying of the pump. This also leads to improved hygiene within the pump.

[0062] According to an advantageous improvement, a sealing device can be provided between the lower housing component of the pump equipment and the tubular heating element. This sealing device is designed to fluid-tightly seal the tubular heating element relative to the lower housing component. Specifically, the sealing device is arranged and designed rotationally symmetrically with respect to the central axis. The sealing device is preferably a sealing ring. In particular, the sealing device can include a V-shaped receiving section that is received in an annular groove of the lower housing component that matches its external geometry. The V-shaped receiving section suitably has an annular groove that curves circumferentially around the central axis, in which the tubular heating element is received. The annular groove is preferably located between an upwardly projecting first protrusion of the receiving section and an upwardly projecting second protrusion arranged radially inward relative to the first protrusion.

[0063] The sealing device preferably includes a deflector section for the flushing fluid. Specifically, the deflector section extends outward from the second protrusion on its upper side. The deflector section is configured to deflect the flushing fluid from the radially oriented assembly of the pump chamber, which is at least generally horizontally arranged, upward in the axial direction. The deflector section suitably has an annular, particularly circular, stop surface on its lower side, by means of which it abuts against the lower housing component on its inner side. From there, the deflector section extends upward, particularly in a crescent shape, and its upper end section abuts against the upright, particularly at least generally vertical, inner wall surface of the tubular heating element. This means that the deflector section advantageously forms a negative (concave) fillet between its bottom section, which extends particularly at least at least horizontally in the lower housing component or pump chamber, and the lower end section of the tubular heating element, which protrudes upward, preferably at least at least vertically. In this embodiment, the fillet is particularly at least at least 90°. Thus, reflection and / or turbulence of the flushing fluid flow are largely avoided in the transition region between the bottom of the pump chamber and the upwardly, particularly at least generally vertically, tubular heating element. The outer wall demarcation of the fluid flow channel is prevented from detaching through the crescent-shaped transition region between the bottom of the pump chamber (particularly at least generally horizontally extending) and the bottom of the upwardly oriented, particularly at least at least generally vertically downward-projecting tubular heating element, located between the pump chamber extending transversely, particularly at least at least generally perpendicular to the central axis, and the upwardly, particularly at least at least generally vertically, pressure and / or diffusion chambers arranged downstream of the pump chamber along the delivery direction. This improves the hydraulic efficiency of the pump equipment.

[0064] Therefore, this sealing device secures and seals the tubular heating element within the pump unit. Furthermore, the sealing device incorporates hydraulically optimized geometry that optimizes the pump unit's hydraulic efficiency for delivery operation, reduces dead zone volume, and minimizes or reduces flushing fluid residue or accumulation within the pump unit when the delivery pump is shut off and flushing fluid returns to the pump inlet under gravity. This contributes to improved pump unit emptying and also leads to improved sanitation within the pump unit.

[0065] According to another embodiment, the pump inlet is constructed rotationally symmetrically with respect to the central axis and oriented along the central axis. Preferably, the pump inlet is centrally located in the bottom region of the housing of the pump device according to the invention.

[0066] Specifically, the pump inlet forms the lowest point of the pump unit. Therefore, it is possible to completely drain the flushing fluid from the pump unit. A suction pipe or connection channel can be connected to the pump inlet, which is in fluid connection to the pump tank of a household dishwasher.

[0067] According to another embodiment, the housing has an integral housing internal component, and a fluid outlet, a first receiving section, and a second receiving section are molded on the housing internal component.

[0068] Currently, the "one-piece" or "unibody" construction of the internal components of the housing can be understood in particular as follows: the internal components are not composed of different sub-components, but rather the fluid outlet, the first receiving section, and the second receiving section form a common structure, i.e., the internal components of the housing. Specifically, the internal components of the housing can be manufactured "material-integratedly." This means that the internal components of the housing are continuously made from the same substrate. For example, the internal components of the housing are made of plastic. The internal components of the housing can be plastic injection molded. In particular, the internal components of the housing can be material-integratedly manufactured using a single-component (1K) plastic injection molding method, or material-integratedly manufactured using a two-component (2K) plastic injection molding method, i.e., manufactured as a single component. Correspondingly, the lower housing component and / or the upper housing component can also be one-piece, particularly material-integrated, components. The internal components of the housing can be at least partially part of the distributor.

[0069] According to an advantageous improvement, during the assembly of the pump device according to the invention, the integral housing internal components can be guided through the central opening of the water distribution element, particularly through the central opening of its annular disc and through the central opening of its drive ring. Here, according to an advantageous improvement, the housing internal components, pre-assembled with the stator, rotor, and impeller, can be introduced, particularly moved, at least substantially along the central axis, preferably from above, into a pre-assembled first structural unit formed by the lower housing component, the upper housing component, and the tubular heating element arranged between them. These two structural units can then preferably be detached again and mechanically secured to each other, i.e., for example, by locking, tightening, etc. This simplifies the assembly and disassembly of the pump device according to the invention.

[0070] If necessary, only the lower housing component and the tubular heating element can be provided as a pre-assembled first structural unit, while the upper housing component can be omitted. Instead, the function of the upper housing component can be implemented at the inner housing component. In particular, for this purpose, the upper housing component can be molded together with the inner housing component to form a pre-assembled second structural unit, while the pre-assembled first structural unit is formed by the lower housing component and the tubular heating element.

[0071] Suitably, and where necessary, the water-distributing element, particularly the annular disc, is guided by a guide section at the central through-hole of the water-distributing element, particularly the annular disc, so that the water-distributing element, particularly the annular disc, is rotatably supported around the central axis at the outer periphery of the cylindrical, particularly cylindrical, at least generally vertical wall section of the second receiving section. The number of guide sections is arbitrary. However, it is particularly preferred that three guide sections be provided, which are evenly distributed around the central axis in the circumferential direction, i.e., staggered from each other by about 120° in the circumferential direction. The guide sections can particularly be part of the internal components of the housing. In particular, the guide sections can be provided in a radially outwardly projecting manner on the at least generally vertically extending, cylindrical, particularly cylindrical, outer surface of the second receiving section.

[0072] Alternatively, it would be appropriate to attach the guide section, particularly in the area molded on the inner edge of the annular disk.

[0073] Instead of spaced-apart guide sections, it is preferable to have, if necessary, a continuous, annular guide section, particularly at least approximately annular in a cross-sectional plane perpendicular to the central axis, preferably provided in the housing component, especially in the at least generally vertical wall section of the second receiving section, or at the inner edge of the annular disk. This guide section preferably protrudes downwards into the upper region of the pressure and / or diffusion chamber at the housing component, the wall section, or the inner edge. This guide section preferably fills a 90° angle region between the generally cylindrical, at least generally vertically protruding portion of the second receiving section and the end plate, and / or between the generally cylindrical, at least generally vertically protruding portion of the second receiving section and the annular disk at least generally arranged in a horizontal storage plane. Specifically, the 90° angle region has an upwardly oriented, inclined flow surface for conveying the flushing fluid from bottom to top, such that the flushing fluid flow is directed toward the location of the through-hole of the annular disk into which the flushing fluid can be applied, which is arranged radially outward from the inner edge of the annular disk.

[0074] According to another advantageous improvement of the invention, when the delivery pump of the pumping device is turned on, the flushing fluid delivered from bottom to top rotates in a preferred rotational direction in the end region of the pressure and / or diffusion chamber. To enable the flushing fluid to flow through a specific fluid outlet, the annular disk of the water distribution element is rotated such that one of its through-holes is upstream of the inlet opening of the fluid outlet to which the flushing fluid is to flow, and this inlet opening is opened. The corresponding fluid outlet is suitably configured such that, viewed along the preferred rotational direction, its inlet section has a larger radius of curvature at the upstream boundary wall region than at the downstream boundary wall region, wherein the rotating flow along the upstream boundary wall region with the preferred rotational direction first enters the inlet opening of the fluid outlet. Thus, the flushing fluid flow arriving in the preferred rotational direction can more effectively abut against the boundary wall region of the transition section, which has a larger radius of curvature. Therefore, separation of the flushing fluid flow from this boundary wall region and / or reflection of the flushing fluid flow at this boundary wall region, and the resulting turbulence, can be largely avoided. By advantageously configuring the upwardly aligned, rounded sidewalls of the inlet section to be flatter than the circumferentially opposite sidewalls on the downstream side of the inlet section, an asymmetric inlet funnel is provided for the flushing fluid flow arriving in the preferred rotational direction, wherein the swirling flow with the preferred rotational direction initially runs along the inlet section, and wherein the inlet funnel captures or contains most or almost all of the flushing fluid flow and feeds into the fluid outlet arrangement located in the connecting section downstream of the inlet section. Viewed differently, according to an advantageous improvement, a steeper, rounded, upwardly oriented boundary wall region of the inlet section is thus positioned along the preferred rotational direction, spaced apart by the width of the asymmetric inlet opening of the inlet section from the flatter, rounded boundary wall region of the inlet section. This steeper, rounded, upwardly oriented boundary wall region has a smaller rounding radius than the boundary wall region of the inlet section along which the swirling flow of flushing fluid arriving in the preferred rotational direction initially runs, and into the fluid outlet arrangement located in the connecting section downstream of the inlet section. Therefore, the inlet section of the fluid outlet has a wider, one-sided inlet region in its inlet area, where the liquid flow rotating in the preferred rotation direction enters first, while the opposite inlet region of the inlet section, spaced apart from it when viewed along the preferred rotation direction, is smaller and wider. The latter is particularly capable of guiding any residual flushing fluid flow that may be circulating in the opposite direction of the preferred rotation direction into the inlet opening of the fluid outlet.

[0075] Particularly suitable is the fact that the contour of the boundary wall of the through-hole for applying flushing fluid in the corresponding hole of the water distribution element, especially its annular disc, continues the contour of the inlet section of the corresponding fluid outlet on the upstream side. This ensures a smooth transition of the flushing fluid reaching the upper section of the pressure and / or diffusion chamber in the preferred rotational direction to the fluid outlet, wherein the water distribution element, especially the annular disc, is arranged upstream of the end plate of the internal components of the housing. In other words, stalling of the flushing fluid flow is largely avoided when the flushing fluid overflows from the upper section of the pressure and / or diffusion chamber through the corresponding through-hole of the water distribution element, especially its annular disc, to the fluid outlet through which the flushing fluid is to flow. In this way, the hydraulic resistance of the pump equipment is reduced and its hydraulic efficiency is improved.

[0076] According to an advantageous improvement, the outer diameter of the stator of the distributor driver is selected to be equal to or smaller than the inner diameter of the central recess or the middle cut of the stator of the drive motor of the pumping equipment. This dimensional specification allows for the manufacture, and especially the stamping, of the stator laminations of the distributor driver, and particularly the stator lamination assemblies of the drive motor of the pumping equipment from a common, i.e., the same blank. This reduces waste of stator lamination material.

[0077] Therefore, generally speaking, the geometry of the first stator lamination, particularly the stator lamination group, used for the stator of the first drive motor, and the geometry of the second stator lamination, particularly the stator lamination group, used for the stator of the second drive motor, which has a smaller diameter than the aforementioned geometry, can be machined from the same blank, especially by stamping. This is advantageous in terms of manufacturing and results in less waste.

[0078] The first stator lamination, particularly the stator lamination group, suitably has a surrounding annular section, particularly a circular annular section, as a geometric shape, from which a plurality of foot segments or teeth extend radially inward. Here, the teeth are preferably evenly distributed around the circumference of the annular section, i.e., each pair of adjacent teeth in the circumferential direction has the same circumferential angular offset from each other. Therefore, between each pair of adjacent teeth, there is a radially inwardly open slot. Each tooth is preferably wound with turns of an electric coil in a subsequent winding process to manufacture the stator of the first drive motor. At the foot segments or teeth, the first stator lamination, particularly the stator lamination group, for the stator of the first drive motor has a predetermined inner diameter. The second stator lamination, particularly the stator lamination group, suitably also has a surrounding annular section, particularly a circular annular section, from which a plurality of foot segments or teeth extend radially inward. Here, the teeth are preferably evenly distributed around the circumference of the annular section, i.e., each pair of adjacent teeth in the circumferential direction has the same circumferential angular offset from each other. Therefore, there are radially inwardly opening slots, particularly between each pair of adjacent teeth. Preferably, each tooth can be wound with turns of an electric coil in a winding process that can be performed later in time to manufacture the stator of the second drive motor. The annular section of the second stator laminations, in particular the stator lamination group, has an outer diameter equal to or smaller than the inner diameter of the first stator laminations, in particular the stator lamination group, such that the second stator laminations, in particular the stator lamination group, are arranged within the first stator laminations, in particular the stator lamination group, during machining from the blank. In other words, the dimensional ratio of the first stator laminations, in particular the stator lamination group, and the second stator laminations, in particular the stator lamination group, for the stator of the first drive motor is such that when the lamination groups are machined from the blank or inserted into each other in a common plane to save as much space as possible, the first stator laminations, in particular the stator lamination group, for the stator of the first drive motor substantially concentrically surround the second stator laminations, in particular the stator lamination group, for the stator of the second drive motor.

[0079] According to an alternative improvement of the invention, the housing can have, in particular, a one-piece or integral outer housing component that defines, outwardly and especially except for the fluid outlet, a liquid delivery channel that is at least approximately rotationally symmetrical with respect to the central axis, wherein at least one tubular heating element is disposed in the liquid delivery channel. This further simplifies the structure or design of the pump device according to the invention. The housing of the pump device only needs to consist of two components: an outer housing component and an inner housing component. In any case, a cover component can also be provided, by which the upper opening of the inner housing component can be closed. This reliably protects the stator disposed within the inner housing component between the first and second receiving sections from moisture and / or flushing fluid. The outer housing component and the inner housing component introduced or submerged therein can be mechanically connected to each other, for example, by snap-fit ​​connections, locking connections, and / or bayonet connections and / or other couplings. An improvement in heat transfer between the tubular heating element and the flushing fluid is also achieved by placing at least one tubular heating element in a liquid delivery channel formed between the inner and outer components of the housing, wherein the flushing fluid is delivered from bottom to top through the liquid delivery channel by means of an impeller or pump wheel of a pump device.

[0080] Specifically, the second receiving section constitutes at least one subsection of the inner boundary wall of the liquid transport channel.

[0081] The tubular heating element is suitably positioned downstream of the pump impeller in the fluid transport channel, observed along its flow path, particularly arranged at least almost rotationally symmetrically with respect to the central axis, and preferably at least almost concentrically with the second receiving section. This tubular heating element is suitably arranged symmetrically with respect to the central axis or central axis of the preferably cylindrical fluid transport channel, such that, observed in the corresponding through-section of the fluid transport channel, at least approximately the same clearance width is obtained between the inner boundary walls formed by the tubular heating element and the liquid transport channel through the internal components of the housing, and between the outer boundary walls formed by the tubular heating element and the liquid transport channel through the external components of the housing, for the flushing fluid flowing there. Therefore, the tubular heating element can be subjected to a highly uniform flow of flushing fluid, which facilitates the transfer of heat from the tubular heating element to the flushing fluid flowing through it.

[0082] In particular, it is sufficient and / or advantageous that the tubular heating element is arranged in the liquid delivery channel with only approximately one turn or a surrounding section, and around the central axis, preferably around the second receiving section of the internal components of the housing. This minimizes or greatly avoids the damage to flow conditions caused by the tubular heating element in the liquid delivery channel. In this respect and / or structurally, it is particularly advantageous that the turn or surrounding section of the tubular heating element is arranged at least substantially horizontally or in a plane orthogonal to the central axis. However, it is also feasible, for example, if higher heat is to be transferred to the flushing fluid, that the tubular heating element surrounds the central axis with more than one turn in the liquid delivery channel.

[0083] Furthermore, the present invention can also relate to the aforementioned pump device for guiding liquids, particularly water, in household appliances, especially household dishwashers. The invention can also be used, for example, in washing machines, dryers, or washer-dryers.

[0084] Therefore, the present invention also generally relates to a water pump device for guiding water in household appliances according to claim 25, particularly for household dishwashers configured as described above and / or according to claims 1 to 24. Such a pump device according to the invention can be implemented particularly in washing machines, dryers, or other water-guiding household appliances. The pump device can be configured as described above and / or according to claims 1 to 24.

[0085] Other advantageous modifications of the invention are described in the dependent claims.

[0086] Hereinafter, the configurations and modifications of the invention explained above and / or described in the dependent claims—except in cases of obviously related or incompatible alternatives—may be applied individually or in any combination thereof. Attached Figure Description

[0087] The invention, its advantageous configurations and modifications, and its advantages are explained in more detail below with reference to the accompanying drawings.

[0088] The schematic diagrams are shown below:

[0089] Figure 1 A schematic perspective view showing a preferred embodiment of a household dishwasher constructed according to the present invention is shown.

[0090] Figure 2 Showing according to Figure 1 A schematic cross-sectional view of a household dishwasher and its hydraulic circuit.

[0091] Figure 3 Showing according to Figure 1 and Figure 2 A schematic cross-sectional view of an advantageous embodiment of the pump device for the hydraulic circuit of a household dishwasher.

[0092] Figure 4 Showing according to Figure 3 A schematic top view of the pump equipment.

[0093] Figure 5 Showing the use of according to Figure 3 A schematic top view of an advantageous embodiment of the water distribution element of a pumping device.

[0094] Figure 6 Showing according to Figure 5A schematic cross-sectional view of the water distribution element.

[0095] Figure 7 Showing according to Figure 5 and Figure 6 An exploded perspective view of a water-distributing element, which includes an annular disk and a drive ring for rotating the annular disk.

[0096] Figure 8 Showing according to Figures 5 to 7 A schematic perspective view of one embodiment of the drive ring of the water distribution element.

[0097] Figure 9 Showing the use of Figure 3 A schematic cross-sectional view of an advantageous embodiment of a water distributor for a pumping device, the water distributor comprising... Figure 5-7 The drive ring and distributor actuator of the water distribution element in the annular groove, wherein the annular disk is omitted.

[0098] Figure 10 Showing the use of according to Figure 3 A schematic cross-sectional view of an advantageous embodiment of the fluid outlet of the pump equipment.

[0099] Figure 11 Showing according to Figure 3 A schematic top view of an advantageous embodiment of the sealing device between the lower part of the pump housing and the tubular heating element.

[0100] Figure 12 Showing according to Figure 11 The sealing device is along its perpendicular to Figure 11 A schematic cross-sectional view of the diameter in the plane of the diagram.

[0101] Figure 13 Showing the manufacturing process Figure 3 The stator laminations, especially stator lamination assemblies, of the drive motor of the pump equipment's delivery pump, and according to... Figure 3 A schematic top view of one embodiment of the stator laminations, particularly the blanks of the stator lamination stack, of the distributor driver of a pump device;

[0102] Figure 14 Showing according to Figure 13 One embodiment of the apparatus comprising a blank, the apparatus providing Figure 3 The pump equipment's delivery pump drive motor's stamped stator laminations, especially stator laminations, and simultaneously providing Figure 3 The pump equipment's distributor drive uses stamped stator laminations, especially stator lamination assemblies, and

[0103] Figure 15 Showing according to Figure 1 and Figure 2The pump device in the hydraulic circuit of a household dishwasher relative to Figure 3 A schematic cross-sectional view of an advantageous implementation variation. Detailed Implementation

[0104] In the accompanying drawings, unless otherwise specified, elements that are the same or have the same function or play the same role are given the same reference numerals.

[0105] Figure 1 A schematic perspective view shows one embodiment of a household dishwasher 1 having a pump device 19 designed according to the principles of the present invention. In principle, such a pump device can also be implemented in other water-conducting household appliances, such as washing machines or dryers.

[0106] Figure 1 A schematic perspective view of one embodiment of a household dishwasher 1 is shown. The household dishwasher 1 includes a rinsing container 2, which can be sealed, particularly watertight, through a (front) door 3. For this purpose, a sealing device can be provided between the door 3 and the rinsing container 2. The rinsing container 2 is preferably square. The rinsing container 2 can be arranged within the housing of the household dishwasher 1. When the door is placed in its preferably at least substantially vertical closed position, the rinsing container 2 and the door 3 can form a rinsing chamber 4 for rinsing the items to be rinsed.

[0107] Container door 3 in Figure 1 The front door 3 is shown in its open, at least generally horizontal, position. The door 3 can be opened or closed by pivoting about a pivot axis 5 located at the lower end of the door. The filling opening 6 on the front side of the flushing container 2 can be opened or closed by means of the front door 3. The flushing container 2 has a bottom wall 7, a top wall 8 opposite to the bottom wall 7, a rear wall 9 opposite to the closed front door 3, and two side walls 10, 11 opposite to each other. The bottom wall 7, top wall 8, rear wall 9, and side walls 10, 11 can be made of, for example, high-quality steel. Alternatively, the bottom wall 7 can be made of, for example, plastic material.

[0108] The household dishwasher 1 also has at least one rinseable container 12 to 14. Preferably, multiple, for example, three rinseable containers 12 to 14 can be provided, wherein rinseable container 12 can be a lower rinseable container or lower basket, rinseable container 13 can be an upper rinseable container or upper basket, and rinseable container 14 can be at least a dish drawer, such as an upper rinseable container or upper basket. Figure 1 The flushing material containers 12 to 14 are also shown arranged vertically to each other in the flushing container 2. Each flushing material container 12 to 14 can be selectively moved into or out of the flushing container 2. In particular, each flushing material container 12 to 14 can be moved into or pushed into the flushing container 2 in the pushing direction E or removed from or pulled out of the flushing container 2 in the pulling direction A.

[0109] Figure 2 A schematic cross-sectional view of a household dishwasher 1 and its hydraulic or circulation circuit is shown. In addition to the rinsing container 2, the household dishwasher 1 also includes a base carrier 15, which supports the rinsing container 2 above the base carrier. The base carrier 15 is, for example, a plastic construction, particularly a plastic injection-molded component.

[0110] A pump tank 16 is provided at point 7 on the bottom wall. The pump tank 16 is tank-shaped and... Figure 2 The pump pool 16 extends downward beyond the bottom wall 7. Therefore, the pump pool 16 is lower than the bottom wall 7 of the rinsing container 2, allowing rinsing fluid to be collected in the pump pool during the rinsing operation of a household dishwasher, flowing from above into its collection opening. The pump pool 16 can be a plastic component, particularly a plastic injection-molded component. The can-shaped pump pool 16 has an outlet opening 17 in its particularly upright wall portion or in its bottom wall portion. In this embodiment, a tubular outlet 17' preferably extends from the pump pool. This outlet can also be omitted if necessary. The pump pool 16 is equipped with a screen system 18. This screen system can particularly include a surface filter that at least partially or completely covers the opening on the upper side of the pump pool from above on the rinsing space side. This screen system can particularly form a portion of the bottom surface of the rinsing container, preferably arranged substantially flush with the bottom wall 7 surface. Additionally or independently of the surface filter, the screen system 18 can also include a coarse filter and a fine filter.

[0111] Pump device 19 is connected to outlet opening 17 or discharge outlet 17'. Pump device 19 is designed for circulating flushing fluid F, i.e., flushing rinsing solution and / or fresh water. For this purpose, the pump device includes a circulation pump or transfer pump for conveying flushing fluid F. In addition, pump device 19 is also designed for introducing heat into flushing fluid F. For this purpose, the pump device has a heater for heating the flushing fluid F conveyed by the transfer pump. Therefore, the pump device is configured as a heating pump, and can therefore also be called a heating pump. Pump device 19 is particularly preferably a compact heating pump, and therefore can also be called a compact heating pump. Pump device 19 can be fixed at pump pool 16 and / or at the bottom wall 7 of flushing container 2. Pump device 19 is preferably arranged completely or at least partially below the bottom wall 7 of pump pool 16 and / or the screen system 18.

[0112] Pump assembly 19 is constructed substantially rotationally symmetrically with respect to an axis of symmetry or central axis 20. The central axis 20 is oriented parallel to the direction of gravity g. Pump assembly 19 has a (transfer) pump 21, which is fluidly connected to the outlet opening 17 or discharge port 17' of pump sump 16 via a suction pipe 22, allowing pump assembly 19 to be fluidly connected via the suction pipe 22 and the outlet opening 17, or as described herein. Figure 2In the embodiments described, flushing fluid F is drawn from the pump sump 16 via the suction connector 22 and the discharge port 17. Generally, the pump unit 19 is preferably fluidly connected to the outlet opening 17 of the pump sump 16 via a connecting channel.

[0113] In addition to pump 21, pump device 19 has a distributor 23 integrated into pump device 19. With the aid of distributor 23, it is possible to selectively distribute the rinsing fluid F delivered by the delivery pump 21 of pump device 19 to different spray devices 24, 25, 26 and / or other liquid application units disposed in rinsing container 2. With the aid of distributor 23, it is possible to selectively apply rinsing fluid F, especially rinsing rinse fluid and / or fresh water, to spray devices 24, 25, 26, or to not apply it at all. Selectivity specifically means either selectively delivering rinsing fluid to the corresponding spray device and / or liquid application unit or not delivering it, or simultaneously delivering rinsing fluid to multiple spray devices and / or liquid application units or not delivering it.

[0114] Spray devices 24 and 25 are preferably rotatable spray arms, while spray device 26 can be a rotatable top rotary device or a fixed top sprayer. Additionally, a connectable high-powered spray zone can be provided, for example, located at or within the washable container, or a screen cleaning nozzle (not shown) can be provided. For example, the lower spray device 24 is positioned below the washable container 12, particularly below the lower basket, in a manner rotatable about the rotation axis 27 at the bottom 7, pump pool 16, or pump device 19. Spray device 24 has spray nozzles for spraying the wash liquid F, particularly the rinsing rinse solution and / or fresh water along... Figure 2 The spray is directed into the rinsing material container 12.

[0115] The upper spray device 25 can be mounted on the washable container 13, particularly the upper basket, in a manner rotatable about the rotation axis 28. The upper spray device 25 also has spray nozzles designed for... Figure 2 The spraying fluid F is directed downwards and / or upwards. The spraying device 26, particularly the top rotator, is positioned at the top 8 of the rinsing container 2 in a manner that allows it to rotate about a rotation axis 29. The spraying device 26 is... Figure 2 The rinsing fluid F is applied from top to bottom to the rinsing container 14, especially the cutlery drawer and the rinsing containers 12 and 13 located below it.

[0116] The lower spray device 24 is fluidly connected to the pump device 19, and particularly to the water distributor 23, via a supply line 30. The pump device 19 can apply flushing fluid to the spray device 24 via the supply line 30.

[0117] Supply line 31 is assigned to the upper spray unit 25, which fluidly connects the spray unit 25 to the pump unit 19. The pump unit 19 is able to apply rinsing fluid F to the spray unit 25 via supply line 31.

[0118] Supply line 32 is distributed to the uppermost spray device 26, which fluidly connects the spray device 26 to the pump device 19. The pump device 19 is able to apply rinsing fluid F to the spray device 26 via supply line 32.

[0119] Here, each spray unit 24, 25, 26 can be assigned its own supply lines 30, 31, 32. Alternatively, all spray units 24, 25, 26, or multiple thereof, can also have branching, shared supply lines. In particular, multiple or all of the supply lines 30, 31, 32 can be formed from shared components, especially from shared plastic injection molded components. Specifically, the supply lines 31, 32 leading to the upper spray units 25, 26 are guided along the rear wall 9 from the bottom wall 7 toward the top wall 8. Here, the supply lines 30, 31, 32, or at least a portion thereof, i.e., for example, supply lines 31, 32, can be guided through the screen system 18 and / or the bottom wall 7.

[0120] Pump device 19 preferably has a separate interface or fluid outlet for each supply line 30, 31, 32. Pump device 19, spray devices 24, 25, 26 and their associated supply lines 30, 31, 32, and the rinsing chamber defined by the wall of rinsing container 2 and the front door 3 that closes its front opening, together form the hydraulic circuit or circulation circuit 33 of the household dishwasher 1. Pump device 19 circulates the rinsing fluid F in this hydraulic circuit 33.

[0121] The household dishwasher 1 also includes at least one adjustment and / or control device 34. With the aid of the adjustment and / or control device 34, different rinsing programs of the household dishwasher 1 can be executed, for example. For this purpose, the rinsing programs can be stored or saved in the adjustment and / or control device 34. The adjustment and / or control device 34 is preferably arranged outside the rinsing container 2.

[0122] One or more components of the adjustment and / or control device 34 can be arranged in or at the door 3. This component is preferably located at the upper edge of the door 3 (not shown). However, the adjustment and / or control device 34 or one or more components thereof can also be housed in the base carrier 15. The adjustment and / or control device 34 can be operated or manipulated by means of an operating element (not shown). The operating element can include, for example, buttons, pushbuttons, and / or a touchscreen. This operating element can be attached to the door 3.

[0123] Pump device 19 can be operated by means of regulating and / or control device 34. For example, the regulating and / or control device 34 can be used to turn the delivery pump 21 on or off and / or change its speed. The regulating and / or control device 34 can receive and evaluate information about pump device 19, such as the speed of delivery pump 21 and / or the motor current of delivery pump 21. In addition, the regulating and / or control device 34 can also operate water distributor 23 to selectively turn the spray devices 24, 25, 26 and / or other liquid application units on or off.

[0124] The items to be rinsed, G, are arranged in the rinsing container 2. The items to be rinsed, G, can include, for example, glasses, plates, pots, bowls, tableware, etc. Specifically, the items to be rinsed, G, are contained in... Figure 2 The rinsing material is contained in rinsing sections 12, 13, and 14 (not shown). The rinsing material G can be rinsed using spray devices 24, 25, 26, and / or others. Figure 2 The liquid application unit (not shown) is used to apply the rinsing fluid F.

[0125] Figure 3 A schematic cross-sectional view of one embodiment of the pump device 19 as explained above is shown. The axial direction AX is assigned to the pump device 19, which is in... Figure 3 The axial direction AX extends from bottom to top, particularly at least generally vertically. The axial direction AX coincides with or is parallel to the central axis 20. Furthermore, the radial direction R is assigned to the pump unit 19. The radial direction R is perpendicular to the central axis 20 and oriented away from it. Therefore, the axial direction AX and the radial direction R are oriented perpendicularly to each other.

[0126] As described above, the pump device 19 has a delivery pump 21 and a distributor 23. The pump device 19 differs from the delivery pump 21 in that, in addition to the delivery pump 21, the pump device 19 also has a distributor 23.

[0127] The pump assembly 19 has a housing 35, which includes a lower housing component 36, an upper housing component 37, and an inner housing component 38. The lower housing component 36 has a pump inlet 39 to which a suction pipe 22, connected to the outlet pipe 17' of the pump sump 16, or more generally to a connection channel fluidly connected to the outlet opening 17 of the pump sump 16, is connected. For example, the suction pipe 22 is inserted into the pump inlet 39 and sealed relative to the pump inlet by means of a sealing element (e.g., in the form of an O-ring). The housing 35 is constructed substantially rotationally symmetrically with respect to the central axis 20. The pump inlet 39 is preferably located at the bottom of the housing 35, particularly centrally at the bottom, and especially within the bottom wall of the lower housing component 36. This pump inlet is preferably located at the lowest point of the pump assembly 19. In particular, the pump inlet can be configured as a suction port that widens in its penetrating cross-section along the flow direction. Here, the suction port is preferably configured rotationally symmetrically. Its axis of symmetry preferably extends along the central axis 20, particularly coinciding with it.

[0128] A tubular heating element 40 is positioned between the lower housing component 36 and the upper housing component 37. Specifically, the tubular heating element 40 is held between the lower housing component 36 and the upper housing component 37. The tubular heating element 40 is preferably a thick-layer heating element. This tubular heating element is tubular or hollow cylindrical. Here, the tubular heating element is arranged and configured with rotational symmetry relative to the central axis 20, i.e., constructed. The tubular heating element 40 is suitably sealed relative to the lower housing component 36 and the upper housing component 37 by means of a sealing element, for example, in the form of an O-ring. Therefore, during operation of the pump unit 19, the flushing fluid F flows along the inner side of the tubular heating element 40.

[0129] The lower housing component 36 and the upper housing component 37 are preferably form-fitted (not shown). For this purpose, one or more locking hooks, latches, etc., may be provided to form-fit connect the lower housing component 36 and the upper housing component 37. The form-fitting connection is formed by two connected mating parts, currently the lower housing component 36 and the upper housing component 37, engaging into each other or engaging from the rear. The inner housing component 38 is form-fitted to the upper housing component 37. For this purpose, one or more corresponding locking hooks, latches, spiral connectors, etc., are also provided. In particular, the inner housing component 38 and the upper housing component can be coupled to each other via a bayonet lock. The lower housing component 36, the upper housing component 37, and the inner housing component 38 are plastic constructions, especially plastic injection molded components.

[0130] The lower housing component 36 houses an impeller or rotor 41, which is arranged downstream of the pump inlet 39 in the pump chamber or pump space, i.e., the impeller space 119. The impeller space 119 is arranged and configured rotationally symmetrically with respect to the central axis 20 and extends radially outward from the central axis 20 to the sidewall of the lower housing component 36. The impeller 41 is driven by a drive motor 42. The drive motor 42 is an electric motor. The impeller 41 may also be referred to as a blade. The drive motor 42 includes a drive shaft 43 that is torsionally connected to the impeller 41, which rotates about the central axis 20, which is the axis of rotation, during operation of the pump unit 19. In addition to the impeller 41, the rotor 44 of the drive motor 42 is also torsionally connected to the drive shaft 43.

[0131] The rotor 44 is supported in a can-shaped first receiving section 45 within the housing component 38 in a manner rotatable about a central axis 20. The first receiving section 45 surrounds a receiving space 46 in which the rotor 44 is housed. Figure 3 The drive shaft 43 is closed by means of a closure 47, oriented downwards, i.e. towards the impeller 41. The drive shaft 43 is centrally guided through the closure 47 and can be supported at the closure. Here, the receiving space 46 can be filled with a flushing fluid F, i.e., flushing rinse fluid and / or fresh water. For this purpose, the receiving space 46 of the first receiving section 45 can be fluidly connected to the impeller space 119 through a targeted overflow point. Therefore, one or more small through openings can be provided in the closure 47 and / or one or more channels can be provided in the drive shaft 43, which are shown here for clarity. Figure 3 In the exemplary embodiment, the through opening and / or channel is omitted. In this way, the drive motor 42 for the impeller 41 is configured as a so-called wet rotor motor. In addition to the first receiving section 45, the housing interior component 38 also includes a second receiving section 48. The second receiving section 48 is also can-shaped. However, unlike the first receiving section 45, the second receiving section 48 is... Figure 3 The orientation is open on the upper side, not the lower side. The first receiving section 45 is arranged within the second receiving section 48. Therefore, the diameter of the second receiving section 48 is larger than that of the first receiving section 45. The second receiving section preferably surrounds the first receiving section 45 in a concentric manner with an annular, especially circular, gap 120 when viewed in cross-section (a plane perpendicular to the central axis). Spatially, the gap 120 is cylindrically formed between the first receiving section 45 arranged radially inward and the second receiving section 48 arranged concentrically outward relative to the first receiving section at a predetermined radial distance.

[0132] Therefore, when viewed in cross-section, an annular, particularly circular, receiving space 49 is provided between the first receiving section 45 and the second receiving section 48. The stator 50 of the drive motor 42 is arranged in the receiving space 49. The stator 50 can, for example, engage with the first receiving section 45 and / or the second receiving section 48, or otherwise remain there in the receiving space 49.

[0133] The transfer pump 21 is specifically formed by a drive motor 42, an impeller 41, and at least part of a housing 35. A tubular heating element 40 may also be part of the pump 21. In particular, the two receiving sections 45, 48 of the housing internal component 38 are part of the transfer pump 21. In contrast, the pump assembly 19, in addition to the transfer pump 21, also includes a distributor 23.

[0134] Figure 4 A schematic top view of the pump device 19 is shown. The internal component 38 has multiple fluid outlets, such as 51, 53, and 54, with supply lines, such as 30, 31, and 32, connected downstream to these outlets. In the case of three spray devices, such as 24, 25, and 26, it is preferable to have exactly three fluid outlets, such as 51, 53, and 54. In the case of four spray devices, for example, four fluid outlets, such as 51, 52, 53, and 54, can be appropriately provided.

[0135] In the current embodiment, fluid outlet 51 is assigned to the spray device 24. Here, if necessary, fluid outlet 51 can also serve as a support for the spray device 24. Fluid outlet 52 is in particular an additional outlet, which can be assigned, for example, to a dense spray area not shown. For example, additional fluid outlets can therefore be provided—as shown here. Figure 4 In one embodiment, fluid outlet 52 is directed via a supply line to a dedicated spray area. Fluid outlet 53 is assigned to spray device 26, and fluid outlet 54 is assigned to spray device 25. However, the assignment of fluid outlets to spray devices and / or other liquid application units can also be selected in different ways.

[0136] Fluid outlets 51, 52, 53, and 54 are tubular and extend from bottom to top, at least substantially vertically, along the central axis 20 or along the axial direction AX. Preferably, the fluid outlets protrude upwards from the housing internal component 38. Here, fluid outlets 51, 52, 53, and 54 can each have a circular, elliptical, or oval cross-section, or an annular segment cross-section. During operation of the pump unit 19, flushing solution and / or fresh water F can be drawn out through fluid outlets 51, 52, 53, and 54.

[0137] Fluid outlets 51, 52, 53, and 54 extend outward at least substantially vertically upward from the end-sealing plate 55 of the inner housing component 38, which seals the upper housing component 37 at its end. Here, in the current example, all fluid outlets fluidly connected to the supply lines leading to the spray devices, such as 24, 25, and 26, such as 30, 31, and 32, extend at least substantially parallel to the central axis 20 of the pump unit 19. A tubular or hollow cylindrical connecting section 56 extends around the circumferential edge of the end-sealing plate 55, by means of which the inner housing component 38 is connected to the upper housing component 37.

[0138] Now back Figure 2 A water distribution element 57, capable of rotating around the central axis 20, is arranged within the housing component 38, particularly between the end plate 55 and the upper part of the housing 37. Figure 5 The water distribution element is also shown in the top view. Figure 6 A schematic cross-sectional view of the water distribution element 57 is shown. Figure 7 A schematic exploded perspective view of the water distribution element 57 is shown. The water distribution element 57 is preferably a two-piece design and includes an annular disk 58 and a drive ring 59. Figure 8 The drive ring is shown in a separate schematic 3D view.

[0139] The water distribution element 57 is part of the water distributor 23. The water distribution element 57 is arranged and configured rotationally symmetrically with respect to the central axis 20. This water distribution element has a central through-hole or central opening 60. The central through-hole or central opening 60 is specifically located at the annular disk 58. The central through-hole or central opening 60 is preferably located at the annular disk 58. The central through-hole or opening 60 is preferably circular. Furthermore, the water distribution element 57 has a plurality of through-holes or openings, such as 61, 62, and 63, through the plate of the annular disk 58. By rotating the annular disk 58, fluid outlets, such as 51, 52, 53, and 54, can be selectively blocked or opened via these through-holes or openings. The through-holes, such as 61, 62, and 63, pass through the annular plate of the annular disk 58 along the central axis 20, especially at least in a generally vertical direction. The flushing fluid F pumped from bottom to top by the impeller 41 can flow from bottom to top through the corresponding through hole, i.e., 61, and when the through hole is positioned upstream of the fluid outlet to be flushed, i.e., 51, 52, 53, 54, by the corresponding rotation of the annular disk 58 around the central axis 20 (viewed from bottom to top along the axial direction or the liquid delivery direction AX), such that the through hole is partially or fully opened at the inlet opening, i.e., E51, E52, E53, E54, it flows into the fluid outlet to be flushed, i.e., the fluid outlet to which the flushing fluid is to be applied, i.e., 51, 52, 53, 54.

[0140] The through holes, such as 61, 62, and 63, can be circular or oval. They can also advantageously be narrow-aperture, particularly annular segments. By means of the geometry of the elongated rows of corresponding through holes, such as 61, 62, and 63, it is possible to simultaneously open multiple fluid outlets, such as 51, 52, 53, and 54. The number of through holes can correspond to the number of fluid outlets, such as 51, 53, and 54. However, this is not absolutely necessary. By means of the water distribution element 57, particularly by means of its annular disc 58, the fluid outlets, such as 51, 52, 53, and 54, can be combined with each other as needed to open them to apply flushing fluid or to close them to prevent liquid from entering or passing through. Therefore, it is feasible, for example, to open fluid outlets 51 and 52 and close fluid outlets 53 and 54.

[0141] The internal housing component 38, with its can-shaped second receiving section 48 comprising a can-shaped first receiving section 45, is guided through a through-hole 60 in the preferred circular row at the center of the annular disk 58. In the assembled state of the pump assembly 19, the second receiving section 48, with its cylindrical, particularly cylindrical, at least generally vertical wall section, runs from top to bottom in the opposite axial direction AX—as described herein. Figure 3 In some embodiments, a through-hole opening 60, preferably through the center of the annular disk 58, is provided, either partially or, if necessary, entirely. Suitably, the annular disk extends along its radially inner edge—as shown here in… Figure 3 In the embodiment shown in the final assembled state of the pump device 19, a cylindrical, particularly cylindrical, at least generally vertical wall portion surrounds the second receiving section 48 of the housing component 38, wherein the radially inner edge defines the central through-hole opening 60 of the annular disk. The central through-hole opening 60 of the annular disk 58 can preferably be selected to be slightly larger than the outer diameter of the cylindrical, particularly cylindrical, at least generally vertical wall portion of the second receiving section 48. Thus, during the assembly of the pump device 19, the housing component 38 (preferably from top to bottom) can be guided with a certain gap through, and particularly through, the central through-hole opening 60 of the annular disk 58, which is suitably pre-assembled with the stator 50, rotor 44, motor shaft 43, possible closure 47, and impeller 41.

[0142] Suitably, when necessary, the water distribution element 57, particularly the annular disk 58, can be guided internally by guide sections, such as 64, 65, and 66, at the through-hole 60 in the center of the water distribution element, particularly the annular disk, so that the water distribution element, particularly the annular disk, is supported at the outer circumference of the cylindrical, particularly cylindrical, at least generally vertical wall section of the second receiving section 48 in a manner rotatable about the central axis 20. The guide section is located at... Figure 5The guide sections are indicated by dashed lines. The number of guide sections is arbitrary. However, it is particularly preferable to have three guide sections 64, 65, and 66, which are evenly distributed around the central axis 20 in the circumferential direction, i.e., staggered from each other by approximately 120° in the circumferential direction. The guide sections 64, 65, and 66 can be particularly part of the housing internal component 38. In particular, the guide sections can be provided radially outwardly on the outer surface of the second receiving section 48, which is at least a generally vertically extending cylindrical, particularly cylindrical, part of the housing.

[0143] Alternatively, it is also applicable to: the guide section being attached, especially in the area molded on the inner edge of the annular disk 58.

[0144] Instead of spaced-apart guide sections, such as 64, 65, and 66, continuous annular, particularly at least substantially annular, guide sections (not shown) can preferably be provided in the housing inner component 38, particularly in the at least substantially vertical wall section of the second receiving section 48, or at the inner edge of the annular disk. Figure 3 The guide segment UL is indicated by a dashed line. This guide segment is additionally attached, particularly molded, to the inner edge of the annular disk 58 and protrudes downward. The guide segment is spatially annular in shape. It fills a 90° angle region between the generally cylindrical, at least generally vertically extending portion of the second receiving segment 48 and the annular disk 58, which is at least generally arranged in a horizontal storage plane. Specifically, the guide segment has an upwardly oriented, inclined flow surface for conveying a flushing fluid stream from bottom to top, such that the flushing fluid stream is directed toward the through-holes where flushing fluid F can be applied, i.e., storage locations such as 61, 62, and 63, which are arranged radially outward from the inner edge of the annular disk.

[0145] The drive ring 59 is suitably coupled to the annular disk 58 in a force-transmitting manner to rotate the annular disk in its respective rotational direction. Preferably, in this embodiment (see [reference]), the drive ring 59 is... Figure 5-8The drive ring 59 has one or more driving members, such as 73, 74, and 75, extending outward from the upper end of the drive ring 59, to establish a coupling or connection between the drive ring 59 and the annular disk 58 for transmitting force when the drive ring 59 is rotated in its respective rotational direction. The one or more driving members are particularly designed to engage with an associated recess in the annular disk 58, such as 67, 68, and 69, which can be particularly located on the outer edge side, such that the drive ring 59 is coupled to the annular disk 58 in a force-transmitting manner in its respective rotational direction. The recess in the annular disk 58 for engaging the driving member of the drive ring 59 can be, in particular, a continuous through-hole from bottom to top, preferably perpendicular to the plane of the annular disk 58, or, but can also be a blind hole, located in the lower side of the annular disk 58 associated with the upper side of the drive ring 59.

[0146] Specifically, the drive member of the drive ring 59 is positioned with a certain gap in the void associated with the drive member in the annular disk 58, such that during the pumping operation of the pump device 19, the annular disk 58 can be pressed upward and float by the flushing fluid F conveyed from bottom to top until the annular disk is pressed against the preferably flat end plate 55 of the housing inner component 38 in the pressure / diffusion chamber 92, or against at least one defining element protruding downward below the end plate, so as to reliably seal the fluid outlets that should be closed, i.e., 51, 52, 53, 54. However, here, the corresponding drive members, i.e., 73, 74, 75, remain engaged with the voids associated with the drive members in the annular disk 58, i.e., 67, 68, 69, respectively. For this purpose, when the drive ring 59 is rotated along its respective rotational direction, the drive member particularly overlaps with a portion of the length of the boundary wall of the void associated with the drive member, and the drive member moves toward the boundary wall.

[0147] In particular, it will be advantageous that, as described herein in this embodiment (see...) Figure 5-8 The annular disk 58 has open-edge through holes on the outer side of the through hole 60 away from the center, serving as empty portions. In this embodiment, it is preferable to provide exactly three empty portions 67, 68, and 69.

[0148] The drive ring 59 has an annular base section 70, particularly a low-height, cylindrical annular base section. A circumferential toothed portion 71, particularly an inclined toothed portion, is attached to the outer side of the base section 70. The drive ring is particularly configured as an annular toothed ring. Driving elements, such as 73, 74, and 75, follow the path along the base section 70. Figure 8The orientation extends towards the upper end 72. The driving elements, such as 73, 74, and 75, are designed to engage with associated recesses, such as 67, 68, and 69, of the annular disk 58, such that the drive ring 59 drives the annular disk 58 in its respective direction of rotation. The driving elements, such as 73, 74, and 75, and the associated recesses, such as 67, 68, and 69, are preferably arranged non-uniformly around the central axis 20, i.e., in the circumferential direction, so that coding is implemented during the assembly of the annular disk 58 and the drive ring 59, which prevents incorrect assembly (Poka Yoke).

[0149] Viewed along the central axis 20 or the axial direction AX, the annular disk 58 can be lifted vertically upward by the drive ring 59, allowing it to float on the flushing fluid F being conveyed upward by the rotary-driven impeller 41 during pump operation 19. However, a force transmission coupling is maintained between the annular disk 58 and the drive ring 59 to rotate the annular disk in its respective rotational direction by means of the drive ring 59. Even when the annular disk 58 floats upward on the flushing fluid flowing towards it from below, it is coupled circumferentially to the drive ring 59, which is conveyed upward by the selectively driven impeller during pump operation 19. Thus, during pump operation 21, the annular disk rotates circumferentially to the desired rotational position by means of the water-distributing actuator 76 rotating the drive ring 59.

[0150] Preferably, the corresponding actuating elements, such as 73, 74, and 75, protrude from the upper side of the drive ring 59 in a vertical or axial direction (along the central axis 20), with this height extension exceeding the maximum predetermined floating or lifting distance of the annular disk 58 in the vertical direction. This ensures that the corresponding actuating elements of the drive ring 59, such as 73, 74, and 75, always overlap the boundary wall of the empty portion associated with the actuating element, such as 67, 68, and 69, at least along the length of their height extension. The maximum floating distance corresponds in particular to the free height gap between the upper side of the annular disk (when the annular disk is laid flat on the end face of the drive ring) and the lower side of the end plate 55, wherein the end plate is preferably part of the housing internal component 38 and covers the annular outlet opening A92 of the upper section of the pressure and / or diffusion chamber 92—preferably widened relative to its cross-sectional width—and has fluid outlets, such as 51, 52, 53, and 54, oriented upward along the central axis 20, or corresponding to at least one defining element ( Figure 3(Not shown in the image), the defining element is attached to the underside of the end cap 55 in a downwardly projecting manner. Therefore, even if the disk 58 floats upwards, the driving elements of the drive ring 59, such as 73, 74, and 75, remain engaged with the annular disk 58; that is, even if the disk 58 floats, the coupling between the drive ring 59 and the annular disk 58 is maintained along the corresponding rotational direction of the drive ring 59. Therefore, even when it is floating, the annular disk 58 can rotate circumferentially by the rotation of the drive ring 59, i.e., clockwise and counterclockwise. This is in Figure 7 The middle part is represented by two arrows U in opposite directions along the circumference.

[0151] The drive ring 59 is suitably positioned with a flat upper or end side when viewed in its at least generally horizontal placement plane, such that the annular disc 58 is mounted in a defined reference position when the level of the flushing fluid F is below the height of the upper end side of the drive ring 59, for example, when the drive motor 42 of the delivery pump 21 is turned off and the flushing fluid F has completely flowed down from the pressure and / or diffusion chamber 92 and the pump chamber 119 through the pump inlet 39 from the housing 35. This reference position of the annular disc 58 largely ensures that the annular disc 58 can float with the flushing fluid F being delivered from below and pressed upward when the drive motor 42 of the delivery pump 21 is turned on. The teeth 71 of the drive ring 59 are specifically positioned below the flat support or mounting surface on its radially outward-facing wall.

[0152] The water distribution element 57, and in particular the annular disc 58 of which arbitrarily opens and closes the different fluid outlets 51, 52, 53, 54, is formed into an annulus, such that the annular disc can be guided at the initial diameter or support diameter inside and can be driven at its outer side, as explained below. Preferably, the inner diameter of the annular disc 58 is larger than the outer diameter of the upwardly oriented, cylindrical, particularly cylindrical, wall portion of the second receiving section 48 of the housing component 38, in which the stator 50 of the drive motor 42 is housed. Due to this arrangement, at least three of the fluid outlets 51, 52, 53, 54 can be opened and closed in corresponding combinations on the same pitch circle. However, four or five fluid outlets are also feasible. Furthermore, compared to the water distributor solution with a rotatable disc as the water distribution element so far, there is a possibility that the fluid outlets 51, 52, 53, 54 can be arranged geometrically further apart from each other, resulting in shorter paths for the different spray devices 24, 25, 26.

[0153] Figure 9 A schematic cross-sectional view of the embodiment of the water distributor 23 as explained above is shown in a horizontal cross-sectional plane passing through the drive ring 59 below the annular disk 58. Therefore, in Figure 9The end plate 55 with fluid outlets 51, 52, 53, and 54 and the annular disk 58 of the distributor 23 are not visible. Only the drive ring 59, the upper part of the housing component 37, and the distributor actuator 76 for rotating the drive ring 59 (and the annular disk 58 coupled thereto) around the central axis 59 are visible, which allows for selective locking and opening of fluid outlets 51, 52, 53, and 54.

[0154] In this embodiment, the distributor drive 76 has a first housing component 77 molded onto the housing upper component 37. A second housing component 78 is form-fitted to the first housing component 77—preferably extending longitudinally therein—particularly locking or snap-fitting, wherein the second housing component 78 closes the first housing component 77. A sealing element, for example in the form of an O-ring, can be provided between the first housing component 77 and the second housing component 78. The housing components 77 and 78 enclose a common internal space 79, which is filled with flushing fluid F during operation of the pump device 19.

[0155] The distributor actuator 76 also includes a stator 80 externally attached to the second housing member 78 and a rotatable rotor 81 disposed within a liquid-filled internal space 79. The rotor 81 is torsionally connected to a drive shaft 82, which is rotatably supported at both housing members 77. A worm 83 is attached to the end portion of the drive shaft 82 opposite to the rotor 81 and the stator 80 associated with it outside the second housing member. This worm engages in the teeth 71 of the drive ring 59. Here, the lower edge of the worm 83 is not lower than the lower edge of the drive ring 59, allowing drainage of the internal space 79. The distributor actuator 76 is a wet rotor. The distributor actuator 76 is an electric motor.

[0156] The drive ring 59 is housed in an annular groove 84 filled with rinsing solution and / or fresh water F, which is preferably molded onto the upper region of the housing component 37, particularly its end region. A plurality of guide plates 85, 86, 87, 88 extend radially outward from radially built-in boundary walls into the annular groove 84, with the drive ring 59 guided inward at these guide plates. The number of guide plates is arbitrary. Preferably, at least three guide plates are provided. The annular groove 84 is capable of draining water along the central axis 20 via a drain opening 89. As in this embodiment, the drain opening 89 is preferably located in the engagement region of the screw 83 and the drive ring 59, allowing advantageous flushing away of dirt particles, rinsing agent solids, lime particles, etc., that may be carried there with the rinsing solution. However, the drain opening can also be located in a different circumferential section of the annular groove 84. The drain opening 89 is located at a height below the annular disc 58, leading into the bottom of the annular groove 84, or below it, into the upper region of the pressure and / or diffusion chamber 92. The outflow bottom of this drain opening begins at the bottom of the annular groove 84 and then, preferably, passes through the radially built-in boundary wall of the annular groove with a certain drop along the central axis 20 to the pressure and / or diffusion chamber 92. To allow the flushing fluid to flow freely out of the meshing region of the worm gear drive 83 and the drive ring 59 via the drain opening or outflow opening 89, it is suitable that the bottom or base of the housing 77, 78 of the wet rotor-distributor driver 76 is at the same height or higher than the bottom of the annular groove 84. Particularly for flushing fluid outflow, it is necessary that the bottom of the housing 77, 78 of the wet rotor-distributor driver 76 has a drop in the direction of the meshing region between the outer teeth 71 of the drive ring 59 and the worm gear drive 83. Specifically, the worm gear 83 is rotatably arranged at a free height distance from the bottom of the annular groove 84 or from the bottom of the housing 77, 78 of the distributor drive 76, allowing the flushing fluid to flow from the internal space 79 of the housing through the drain opening 89 into the pressure and / or diffusion chamber 92, and is not blocked or prevented by the worm gear 83 as a barrier when the delivery pump 21 of the pumping device 21 is shut off. Therefore, the internal space 79 of the distributor drive 76 is fluidly connected to the annular groove 84. Thus, the internal space 79 can also be drained along the central axis 20 via the annular groove 84 and the drain opening 89.

[0157] The internal space 79 and the annular groove 84 form a fluid chamber 90 filled with flushing fluid F. The rotor 81, drive shaft 82, worm gear 83, and drive ring 59 are located within the fluid chamber 90. Therefore, no dynamic or moving seals are required.

[0158] To enable changes in the required electrical input power and the rotation direction of the distributor driver 76, the distributor driver 76 is preferably configured as a brushless motor. Specifically, the distributor driver 76 is a permanent magnet synchronous motor (PMSM). Preferably, the distributor driver 76 is a brushless direct current motor (BLDC). The distributor driver 76 is electronically commutated. In particular, a brushless alternating current (BLAC) motor can also be used as the distributor driver 76. Depending on the type of motor selected for the distributor driver 76, suitable sensor functionality can be introduced.

[0159] The water distribution drive 76 is configured as a wet rotor, ensuring that no losses, especially frictional and / or leakage losses, occur during the operation of the pump unit 19 due to dynamic or moving seals. Specifically, unlike in a dry rotor, the wet rotor distributor drive does not have a drive shaft seal; a sliding drive shaft seal is preferred. In a dry rotor, the rotor chamber housing the rotor is preferably separated from the air filled by the delivered flushing fluid by a separation wall and sealed relative to this space to keep the rotor chamber dry. The drive shaft connected to the rotor extends from the rotor chamber through a through-hole opening sealed by a shaft seal into the space filled by the delivered flushing fluid. Furthermore, the worm gear 83 on the drive shaft 82 provides the feasibility of transmitting the maximum transmission ratio, and thus the maximum torque, to the drive ring 59 of the water distribution element 57 with the lowest possible electrical input power using only one transmission stage. The transmission ratio between the worm gear 83 and the drive ring 59 is preferably in the range of 1:50 to 1:250. Hard ferrite rings are preferably used as the material for the rotor 81. This eliminates the need for corrosion protection.

[0160] The advantages of the previously described device, which is without seals, especially without dynamic seals, and preferably only requires a shaft seal, can be listed as follows: minimizing losses that would otherwise result from dynamic or moving seals; preventing seal wear during the service life of the pump unit 19; and resistance to contamination of the transmission, as the worm 83 removes dirt from the teeth 71 of the drive ring 59 during its rotation. This offers particular advantage over spur gear teeth. The worm 83 is particularly capable of having spherical teeth.

[0161] Furthermore, the direction and speed of rotation can be changed. It is feasible to generate the largest possible transmission ratio using only a single transmission stage. The worm 83 can be configured as a single thread. The drive ring 59 has the largest possible diameter to create the largest possible transmission ratio, thereby generating the largest possible torque using the smallest possible distributor drive 76. This saves resources.

[0162] Preferably, such as Figure 9As shown in the cross-sectional plane, the distributor actuator 76, particularly its worm gear drive, can be positioned at an angle of at least approximately 90° relative to the central axis 20 or the rotation axis of the drive ring 59 in a at least generally horizontal or horizontal storage plane of the distributor actuator. If necessary, it is also suitable that the distributor actuator 76 is arranged laterally at an angle other than 90° to the central axis 20. In particular, it is advantageous that the distributor actuator 76 is arranged at an angle or inclination such that the bottom of its elongated housing formed by the first housing member 77 and the second housing member 78 has a drop towards the worm 83. Here, the second housing member 78, in which the rotor 81 is housed, is arranged higher than the first housing member 77, which has the worm 83. Therefore, flushing fluid can flow from the elongated housing of the distributor actuator 76 formed by the first housing member 77 and the second housing member 78 into the annular groove 84, and from there back into the diffusion chamber 92 via the drain opening 89 when the delivery pump 21 is shut off. In this way, blind holes or collection points where flushing fluid or dirt could remain in the distributor drive 76 and the annular groove 84 with the drive ring 59 can be largely avoided. Therefore, the distributor 23 is particularly insensitive to stains.

[0163] By using the worm gear 83 and the teeth 71 of the drive ring 59, self-locking is achieved, preventing the water distribution element 57 from rotating unexpectedly. The high transmission ratio between the worm gear 83 and the teeth 71 of the drive ring 59 ensures that the water distribution plate 57 can always rotate reliably while generating effective friction between the drive ring 59 and the component 37 on the housing.

[0164] The aforementioned arrangement of pump unit 19 offers several advantages. It advantageously eliminates the pressure-applying sealing point between the transfer pump 21 and the distributor 23. For the entire pump unit 19, the structural height is reduced, resulting in lower structural space requirements. Water demand and so-called circulation volume can be reduced. In particular, the total flushing fluid filling volume of pump unit 19 can be reduced compared to pump units so far. A more efficient circulation pump system can be achieved with pump unit 19. This allows for more possible locations and / or combinations of opening and closing of fluid outlets, such as 51, 52, 53, and 54. Uniform flow to fluid outlets, such as 51, 52, 53, and 54, is possible. Furthermore, spatial separation of fluid outlets, such as 51, 52, 53, and 54, is feasible.

[0165] As previously mentioned, the water distribution element 57 is preferably designed as a two-piece unit in the pump assembly 19. The annular disk 58 functions as a perforated disk, decoupled from the drive ring 59, which acts as a driver for the annular disk 58. This arrangement achieves that the drive ring 59 is preferably driven tangentially via the teeth 71, thereby optimally designing the support clearance between the drive ring 59 and the drive worm 83. Furthermore, the annular disk 58 is buoyantly supported at the drive ring 59, allowing it to float upwards from the drive ring 59 in the axial direction AX under applied water pressure, and to better seal the inlet openings, such as E51, E52, E53, and E54, with one or more closed wall sections, thereby blocking the fluid outlets, such as 51, 52, 53, and 54, wherein the wall sections are located between the through-holes, such as 61, 62, and 63, which are distributed circumferentially and allow the application of flushing fluid.

[0166] The floating of the annular disk 58 (along the central axis 20) is particularly capable of being in the range of 0.2 mm to 2 mm, so as to generate the lowest possible flow loss in the supported area between the annular disk 58 and the drive ring 59. As explained above, the drive members 73, 74, 75 on the drive ring 59 are suitably positioned such that the annular disk 58 can only be mounted in a defined position. Plastics, such as polyoxymethylene (POM), are preferably used as the material for the drive ring 59 and the annular disk 58. The inner diameter of the drive ring 59 and the annular disk 58 is particularly capable of being in the range of 50 mm to 120 mm. The outer diameter of the drive ring 59 and the annular disk 58 is preferably capable of being varied between 90 mm and 200 mm. The axial thickness of the annular disk 58 (along the axial direction AX) is, for example, 1.4 mm, to ensure a certain degree of flexibility. Preferably, the axial thickness of the annular disk is in the range of 0.8 mm to 3 mm.

[0167] Therefore, advantageously, a floating support for the annular disk 58 can be achieved. This allows for as many output combinations as possible with the through holes 61, 62, and 63 in the annular disk 58 on the same segment. With the floating support of the annular disk, the disk can cover the fluid outlets 51, 52, 53, and 54 to be blocked with particularly good sealing. The floating of the annular disk 58 is simplified by the two-piece structure of the water distribution plate 57. This reduces the risk of the annular disk 58 curling and / or jamming.

[0168] The floating support of the annular disk 58 decouples it from the support clearance of the distributor actuator 76. The complexity of the different distributor elements 57 (which can vary in particular in terms of the number, shape, and / or size of the orifices for distributing liquid in the distributor element) is transferred to a component that can be manufactured with simple structure, namely the annular disk 58. Since the drive ring 59 does not float or floats less and maintains its position relative to the element that drives the drive ring in the form of the worm 83 of the distributor actuator 76, a more precise or reduced axial spacing tolerance (between the axis of rotation of the drive shaft 82 of the distributor actuator 76 with the worm 83 and the axis of rotation of the drive ring) can be achieved in the transmission stage formed by the teeth 71 of the worm 83 and the drive ring 59, thereby enabling more precise positioning between the worm 83 and the teeth 71 of the actuator. Thus, the worm 83 is definedly engaged in the drive ring 59. The distributor 83 is maintenance-friendly because, in the event of wear, the drive ring 59 can be replaced independently of the annular disk 58. When pump unit 19 is shut off (i.e., its delivery pump 21 is closed and drive ring 59 rotates by means of the distributor drive), friction of drive ring 59 at housing 35 is reduced. This results in reduced wear. When pump unit 19 is turned on (i.e., its delivery pump 21 is running), flushing fluid flows evenly from below onto annular disk 58, thereby relatively reducing the risk of annular disk 58 tilting. Pump unit 19 does not need to be equipped with multiple sealing elements, but only a single sealing element in the form of annular disk 58.

[0169] Figure 10 A cross-sectional view of one embodiment of the fluid outlet, such as 51, is shown in a cross-sectional plane parallel to the central axis 20. All subsequent embodiments relating to fluid outlet 51 can be correspondingly applied to fluid outlets 52, 53, and 54. Fluid outlet 51 is... Figure 10 The orientation extends outward from the end cap 55 on the upper side. The fluid outlet 51 has an asymmetric funnel geometry.

[0170] The fluid outlet 51 includes a tubular connecting section 91. The connecting section 91 can be circular, oval, or elliptical in cross-section, i.e., in a plane perpendicular to the central axis. An oval cross-section has the advantage of saving structural space in the radial direction R, where a larger flow cross-section can be achieved with the same installation space in the radial direction R compared to a circular cross-section. One of the supply lines 30, 31, and 32 is connected to the connecting section 91 on the outlet side.

[0171] Viewed in a cross-sectional plane perpendicular to the central axis 20, an annular, particularly circular, pressure and / or diffusion chamber 92 is formed around the central axis 20 between the lower housing component 36, the tubular heating element 40, the upper housing component 37 (serving as the outer wall), and the second receiving section 48 of the inner housing component 38 (serving as the inner wall). The pressure and / or diffusion chamber 92 extends from the pump chamber 119 equipped with the impeller 43 toward the water distribution element 57. Here, the pressure and / or diffusion chamber 92 is constructed rotationally symmetrically with respect to the central axis 20. Spatially, the pressure and / or diffusion chamber is at least segmentally and at least substantially cylindrical. Preferably, the upper end section of the pressure and / or diffusion chamber 92 is widened relative to the section of the pressure and / or diffusion chamber 92 located upstream of the water distribution element, wherein this upper end section is located upstream of the water distribution element 57 along the flow direction of the flushing fluid F conveyed upward by the delivery pump 21, wherein the tubular heating element, in particular, serving as the outer wall, is allocated to the section located upstream of the water distribution element. The pressure and / or diffusion chamber distributes the flushing fluid F onto the annular disk 58 of the water distribution element 57. The water distribution element 57 is integrated into the pressure and / or diffusion chamber 92. Fluid outlets 51, 52, 53, and 54 protrude from the pressure and / or diffusion chamber 92, particularly at least generally vertically.

[0172] In the region below the water distribution element 57, particularly below its annular disk 58, during the operation of the pump unit 19, in the annular pressure and / or diffusion chamber 92 observed in a cross-sectional plane perpendicular to the central axis 20, the flushing fluid F flows along the direction S (see...). Figure 4 The flushing fluid flows in a circular pattern around the central axis 20. This flushing fluid exits the pressure and / or diffusion chamber 92 upwards along the axial direction AS through fluid outlets opened by means of the distributor 23, namely, 51, 52, 53, 54, to the corresponding supply lines 30, 31, 32, in order to apply flushing fluid F to the spray devices 24, 25, 26. This is because the flushing fluid F drawn by the impeller 43, which is rotated and driven in the pump chamber 119, is given a rotating or circulating flow S, preferably in a preferred rotation direction (preferred rotation direction), which moves forward axially from bottom to top through the annular cylindrical gap of the pressure and / or diffusion chamber 92. In this embodiment, the preferred rotation direction S of the rotating flow extends clockwise.

[0173] like Figure 10 As shown, the transition section or inlet section 93 connects to the connecting section 91 on the downstream side, thereby connecting the tubular connecting section 91 to the housing internal component 38, particularly its upper end plate 55. The transition section 93 has the asymmetrical funnel geometry described above. This geometry can also be described as shoe-shaped.

[0174] The transition section 93 has a rounded portion or radius 94. Opposite to radius 94, there is an inclined portion 95, which transitions into the end plate 55 by radius 96 and into the connecting section 91 by radius 97. The transition section 93 completely surrounds the connecting section 91, wherein radius 94, inclined portion 95, and radii 96 and 97 transition into each other.

[0175] The geometry of fluid outlet 51 is adapted along the preferred flow direction S by radii 94, 96, 97 and inclined portion 95 and by the resulting asymmetric geometry toward connecting section 91, so that washing liquid, rinsing liquid and / or fresh water F can flow into fluid outlet 51 in an optimal manner.

[0176] This asymmetric geometry, also known as shoe-shaped geometry, at least approximately simulates a small helical shell for the fluid outlet 51. Furthermore, the radii 94 and 96 of the fluid outlet 51 continue at the through-holes 61, 62, and 63 of the annular disk 58 of the distributor 23 via radii 98 and 88. Additionally, radius 94 is also attached to the side of the flow at the fluid outlet 51 opposite to the preferred rotation direction S of the flushing fluid, allowing flushing fluid F flowing opposite to the preferred or main flow direction S to also flow into the fluid outlet 51. The preferred elliptical cross-sectional geometry of the fluid outlet 51 or connecting section 91 also achieves an increase in the flow cross-section without enlarging the diameter of the distributor element 57, particularly its annular disk 58, and / or the pump device 19.

[0177] For the flushing fluid conveyed during the operation of pump unit 19, the flow geometry in the upper section of the pressure and / or diffusion chamber, the water distribution element located there, especially its annular disk, and the transition region between the fluid outlets through which the flushing fluid flows can be summarized in particular as follows:

[0178] When the delivery pump 21 is turned on, the flushing fluid F delivered from bottom to top rotates in the end region of the pressure and / or diffusion chamber 92 in a preferred rotational direction S, which in this embodiment is, for example, clockwise. In order to allow the flushing fluid F to flow through a specific fluid outlet, i.e., 51, the annular disk 58 of the water distribution element 57 rotates such that one of its through-hole openings, i.e., 61, stops upstream of the inlet opening E51 of the fluid outlet 51 through which the flushing fluid F is to flow, and opens the inlet opening E51. The fluid outlet 51 is suitably configured such that, viewed along the preferred rotational direction S, the radius of curvature of its transition section 93 at the upstream boundary wall region (along which the rotating flow with the preferred rotational direction S first enters the inlet opening E51 of the fluid outlet 51) is greater than that of the downstream boundary wall region viewed along the preferred rotational direction S. Thus, the flushing fluid flow arriving in the preferred rotational direction S can adapt to the boundary wall region of the transition section 93 facing the upstream side of the flushing fluid flow, which has a larger radius of curvature. Therefore, separation of the flushing fluid flow from the boundary wall region or reflection of the flushing fluid flow at the boundary wall region is largely avoided, as well as the resulting turbulence or eddies in the flushing fluid flow. By configuring the upwardly aligned, rounded sidewalls of the transition section 93 to be flatter than the circumferentially opposite sidewalls of the transition section 93 on the downstream side, an asymmetric inlet funnel is provided for the flushing fluid flow arriving in the preferred rotation direction S. This inlet funnel at least most or almost completely captures the flushing fluid flow and feeds it into the connection section 91 of the fluid outlet 51, where the rotating flow with the preferred rotation direction S first flows along the transition section. Viewed from different angles, the steeper, rounded, upwardly oriented boundary wall region of the transition section 93 is opposite the flatter, rounded boundary wall region of the transition section 93 in the preferred rotation direction S with the width of the asymmetric inlet opening of the transition section. The steeper boundary wall region has a smaller rounding radius than the boundary wall region of the inlet section, where the swirling flow of flushing fluid arriving in the preferred rotation direction first flows along this boundary wall region and enters the connecting section downstream of the inlet section. Therefore, the transition section 93 is wider on one side in its input region, where the liquid flow rotating in the preferred rotation direction S first flows in, while the widening of the opposite inlet region of the inlet or transition section 93, spaced apart from it along the preferred rotation direction S, is less pronounced. This inlet region is particularly effective in guiding any residual flushing fluid flow circulating in the opposite direction of the preferred rotation direction S into the inlet opening E51 of the fluid outlet 51. Figure 10The advantage of this arrangement shown is that the flushing fluid is optimally deflected at the fluid outlet 51 to achieve the maximum possible hydraulic efficiency of the pump assembly 19. Optimal utilization of the flow cross-section of the fluid outlet 51 is achieved because no turbulence or at least minimal turbulence is generated when the flushing fluid F flows into the fluid outlet 51, thus utilizing its entire flow cross-section. The preferred elliptical cross-section of the fluid outlet 51 or the connecting section 91 increases the flow cross-section without increasing the diameter of the water distribution element 57 of the distributor 23, thereby making the pump assembly 19 more compact.

[0179] Figure 11 Showing according to Figure 3 A schematic top view of an advantageous embodiment of the sealing device 100 between the lower housing component 36 of the pump unit 19 and the tubular heating element 40. Figure 12 Perpendicular to Figure 11 A schematic cross-sectional view of the diameter of the sealing device 100 is shown in the cross-sectional plane. The sealing device 100 is designed to seal the tubular heating element 40 relative to the lower housing component 36 in a fluid-tight manner.

[0180] The sealing device 100 is rotationally symmetrically arranged and constructed with respect to the central axis 20. The sealing device 100 is a sealing ring. The sealing device 100 includes a V-shaped receiving section 101 that is received in an annular groove suitably shaped to the external geometry of the housing lower component 36. The receiving section 101 has an annular groove 102 that completely surrounds the central axis 20 in the circumferential direction, in which a tubular heating element 40 is received. The annular groove 102 is disposed between an upwardly projecting first protrusion 103 of the receiving section 101 and a radially inwardly arranged, upwardly projecting second protrusion 104 opposite to the first protrusion.

[0181] A deflection segment 105 extends outward from the second protrusion 104 on the upper side. This deflection segment is designed to deflect the flushing fluid F flowing out of the pump chamber 119, which is arranged radially, upward in the axial direction AX, as indicated by arrow 106. The deflection segment 105 has an annular, particularly circular, abutment surface 107 on the lower side, with which it abuts against the lower housing component 36 on the inner side. The deflection segment begins there and extends upward in a particularly crescent-shaped concave manner, with its upper end section abutting against the upright, particularly at least at least vertical, inner wall surface of the tubular heating element 40. This means that the deflection segment forms a negative (concave) rounded edge between the bottom section of the pump chamber 119, which extends particularly horizontally, or the lower housing component 36, and the lower end section of the tubular heating element 40, which protrudes upward, preferably at least at least vertically, with an edge of at least at least 90° in the current embodiment. Thus, reflection and / or turbulence of the flushing fluid flow are largely avoided in the transition region between the bottom of the pump chamber 119 and the upwardly, especially at least generally vertically, tubular heating element 40. The crescent-shaped transition region between the bottom of the pump chamber 119 and the lower end section of the upwardly oriented, especially at least generally vertically, tubular heating element 40 prevents fluid from detaching from the outer wall boundary in the transition region of the fluid flow channel. This outer wall boundary is located between the pump chamber 119, which extends transversely, especially at least at least perpendicularly to the central axis, and the pressure and / or diffusion chamber 92, which is arranged downstream of it in the delivery direction and extends upwardly, especially at least at least vertically. This improves the hydraulic efficiency of the pump device 19.

[0182] The deflection section 105 has a radius 108 away from the contact surface 107. The rinsing solution and / or fresh water F is deflected at radius 108, as indicated by arrow 106. Radius 108 forms the fluid-facing side of the sealing device 100. A cylindrical outer surface 109 is provided at the deflection section 105, which is arranged and constructed rotationally symmetrically with respect to the central axis 20. The deflection section 105, with its outer surface 109, abuts against the tubular heating element 40 on its inner side.

[0183] The sealing device 100 seals and secures the tubular heating element 40, and simultaneously guides the flushing fluid F exiting the impeller 41 upward toward the tubular heating element 40 by means of a radius 108 or a chamfer. No residue or accumulation of flushing fluid, i.e., flushing bleed fluid and / or fresh water F, forms within the pump unit 19. This optimizes the hydraulic efficiency of the pump unit 19, prevents the residue of flushing bleed fluid and / or fresh water F within the pump unit 19, and reduces the circulation volume of the pump unit 19, particularly reducing the dead zone volume. Therefore, corners or edges are avoided between the base of the pump chamber 119 and the upwardly projecting, particularly at least substantially vertically protruding, pressure and / or diffusion chamber 92 (whose outer wall is at least partially formed by the tubular heating element 40), where flushing fluid would otherwise remain when the drive motor 42 of the delivery pump 21 is shut off and the flushing fluid F flows back to and from the pump inlet 39 in the opposite direction of its delivery flow. This reduces the dead zone volume of the pump unit 19. More precisely, when the transfer pump 21 is shut off, the drop in the crescent-shaped deflection section 105 ensures that the flushing fluid flowing downwards in the pressure and / or diffusion chamber 92 is diverted to the impeller 41 in the pump chamber 119, and from there flows out of the pump assembly 19 via the pump inlet 39 arranged below it. Therefore, the evacuation of the pump assembly 19 is improved when the drive motor 42 of the transfer pump 21 is shut off.

[0184] The sealing device 100 secures the tubular heating element 40 within the pump assembly 19 and simultaneously seals the tubular heating element. Furthermore, the sealing device 100, having a radius of 108, includes hydraulically optimized geometry to optimize the hydraulic efficiency of the pump assembly 19 and minimize the residue of flushing fluid F within the pump assembly 19 after pumping.

[0185] The V-shaped receiving section 101 secures and seals the tubular heating element 40, and simultaneously, during the continuous operation of the delivery pump 21 (with the drive motor 42 engaged), the chamfer or radius 108 on the fluid-facing side of the sealing device 100 smoothly forwards the flushing fluid F exiting the impeller 41 to the tubular heating element 40. Furthermore, this fills the annular groove in the lower housing component 36, and prevents any residue or accumulation of flushing fluid F from forming within the pump unit 19.

[0186] The advantages of this previously explained arrangement are: optimized hydraulic efficiency of pump unit 19, avoidance of residual flushing fluid F in pump unit 19, thus making the design more hygienic, and reduction of the circulation volume of flushing fluid F, thereby reducing dead zone volume.

[0187] Now back to Figure 3When the pump unit 19 is in operation and the drive motor 42 is engaged, the impeller 41 draws flushing fluid F from the pump sump 16 via the suction pipe 22 connected to the pump inlet 39. The flushing fluid F is then conveyed upwards towards the distributor 23, particularly towards the distributor element 57, via the pressure and / or diffusion chamber 92. Here, the flushing fluid F flows through the pump inlet 39, centrally located at the lowest point of the pump unit 19, into the pump chamber 119 equipped with the impeller 41, where it flows radially outwards in the pump chamber to the radius 108 of the sealing device 100, and from that radius... Figure 3 The orientation, when viewed in space, is particularly spiral-shaped upward and deflected along the axial direction AX, i.e. opposite to the direction of gravity g, into the pressure and / or diffusion chamber 92 downstream of the pump chamber 1119, and toward the water distribution element 57, which is housed in the upper end section of the pressure and / or diffusion chamber 92.

[0188] Within the pressure and / or diffusion chamber 92, the flushing fluid F rotates around the central axis 20 along the preferred rotational direction S (see...). Figure 4 The flushing fluid flows upwards in a spiral pattern. Currently, the preferred rotation direction or main flow direction S is clockwise. However, the preferred rotation direction S can also be counterclockwise. The annular disk 58 of the water distribution element 57 floats on the flushing fluid F, with the annular disk 58 lifted from the end side 72 of the drive ring 59 and pressed against the end plate 55 on its inner side. This seals the annular disk 58 relative to the end plate 55, allowing the flushing fluid F to flow out of the pump unit 19 only through the fluid outlets 51, 52, 53, and 54 opened by the annular disk 58. The annular disk 58 is driven by the drive elements 73, 74, and 75 of the drive ring 59 in its rotational direction, so that even when the annular disk is floating during the delivery operation of the transfer pump 21, the drive ring 59 can be rotated to the desired rotational position by means of the motor of the water distributor driver 76. Therefore, even if the annular disk 58 is lifted 59 from the drive ring, it remains connected between the annular disk 58 and the drive ring 59 in the corresponding rotational direction of the drive ring, so that the water actuator 76 can still rotate the annular disk 58 as before.

[0189] During the operation of pump unit 19, regulating and / or controlling device 34 can manipulate distributor driver 76 to rotate distributor disc 57, thereby selectively opening and / or closing individual or all fluid outlets 51, 52, 53, 54. This allows for the separate switching on or off of spray devices 24, 25, 26. Therefore, for example, it is feasible to selectively apply flushing fluid F only to two spray devices 24, 25, and not to spray device 26.

[0190] Therefore, the spray devices 24, 25, and 26 can be activated or deactivated at will. Activation or deactivation of the spray devices 24, 25, and 26 is preferably performed during a rinsing process executed by means of a rinsing program. The rinsing program can be stored in the adjustment and / or control device 34. Any number of different rinsing programs can be stored in the adjustment and / or control device 34.

[0191] The pump inlet 39 specifically forms the lowest point of the pump assembly 19. This causes the flushing fluid F to flow completely out of the pump assembly 19 due to gravity, as this is in Figure 3 The arrow 110 is used to indicate this.

[0192] The aforementioned design of the pump device 19 results in the rinsing process of the household dishwasher 1, where the transfer of rinsing alkali from one rinsing tank to the next is kept as low as possible. This objective is achieved by minimizing the residual amount of rinsing fluid F after pumping, particularly in the pump tank 16, the possible outlet pipe 17', the suction pipe 22, and the pump device 19. A significant effect of reducing the residual amount of rinsing fluid F is an improvement in the so-called stain value after drying. This is derived from the fact that when a small amount of cleaning liquid or alkali is transferred from the cleaning phase of the corresponding dishwashing program to the rinsing tank of the rinsing phase of that program, small amounts of detergent and / or dirt residue on the dishware parts also dry and become visible.

[0193] To ensure that pump unit 19 is completely emptied, drive motor 42 and impeller 41 are at least substantially vertically aligned. That is to say, the central axis 20 extends at least approximately parallel to the direction of gravity g. Similarly, fluid outlets 51, 52, 53, and 54 are also arranged at least substantially vertically. To ensure the lowest possible structural height, distributor 23 is integrated into pump unit 19. The pressure and / or diffusion chamber 92 of pump unit 19 is preferably in a gap that is at least partially segmented in annular cylindrical shape, surrounding drive motor 42 on one side, particularly the inner side, and defined on the other side, particularly the outer side, by tubular heating element 40.

[0194] An exemplary spacing between the drive motor 42 and the tubular heating element 40, or at least the gap width of the segmented annular cylindrical pressure and / or diffusion chamber 92, is between 3 mm and 12 mm. This arrangement also allows waste heat from the drive motor 42 to be carried away by the flushing fluid F and used for its heating. Furthermore, in this arrangement, optimal ventilation of the pump unit 19 is ensured because there is no air chamber in the upper region of the pump unit 19, particularly in the region of the distributor 23.

[0195] This means that when the pump pool 16 is filled with flushing fluid F, the pump device 19 operates in parallel with the flushing fluid F like two connected pipes, without forming any air chambers, which facilitates the undisturbed operation of the pump device 19. The outer boundary of the fluid outlets of the distributor 23 leading to the spray devices, such as 24, 25, 26, and such as 51, 52, 53, 54, is preferably located on the outer ring, while the inner boundary of the fluid outlets of the distributor 23 leading to the spray devices, such as 24, 25, 26, and such as 51, 52, 53, 54, is preferably located on the inner ring. Thus, the inner and outer boundaries can be preferably arranged there. Furthermore, one or more through-holes of the annular disk 58 of the water distribution element 57 can be optimally associated with these inner and outer boundaries. Here, at least a portion of the fluid outlet can have a flow cross-section that is not circular, but rather an oval-shaped, live annular segment.

[0196] During the pumping process using pump device 19, all flushing fluid F is returned to pump pool 16. One effect is improved flushing results, particularly less dirt is generated on the flushed material G. Pump device 19 can be fully ventilated without any additional measures. Heat dissipation or cooling of drive motor 42 can be achieved via contact between stator 50 and pressure and / or diffusion chamber 92. Here, only the second receiving section 48, which defines the pressure and / or diffusion chamber 92 from the inside, is arranged between stator 50 and pressure and / or diffusion chamber 92. A very compact configuration is achieved for pump device 19, resulting in corresponding structural space advantages.

[0197] In summary, viewed from bottom to top along the central axis 20, the pump inlet 39, pump chamber or impeller chamber 119 of the pump device 19, the impeller or rotor 41 rotatably driven therefor to convey flushing fluid F, the pressure and / or diffusion chamber 92 arranged downstream of the pump chamber 119, the water distribution element 57 rotatable about the central axis 20 in the upper section of the pressure and / or diffusion chamber 92, and multiple fluid outlets, such as 51, 52, 53, and 54, are arranged in successive height positions as functional sections of the liquid delivery channel 121 of the pump device 19. Here, the liquid delivery channel is understood as a cavity provided in the housing 35 of the pump device 19, which is filled and traversed by flushing fluid F during the delivery operation of the pump device 19. Through the sequential arrangement of the functional sections of the liquid delivery channel 121 of the pump device, the flushing fluid F rises from the pump inlet 39 upwards in the housing 35, opposite to the direction of gravity g, towards the corresponding fluid outlets, such as the outlet openings A51, A52, A53, and A54, for example, 51, 52, 53, and A54. This largely avoids deflection and / or reflection of the conveyed flushing fluid F along the directional component of the direction of gravity g, i.e., its upward direction of delivery. Therefore, it largely avoids backflow of the liquid F conveyed by the impeller 41 through the liquid delivery channel 121 in its path. Furthermore, the sequential arrangement of the functional sections of the liquid delivery channel 121 facilitates a simple structure of the pump device 19 and associated simple manufacturing. Conversely, the pump device can also be easily disassembled, for example, in maintenance situations, making access to every important component of the pump device. Furthermore, this sequence of the functional sections of the liquid delivery channel 121 ensures that when the drive motor 42 for the impeller 41 is turned off and the impeller 41 is stationary, the rinsing fluid F can flow completely downwards through the pump inlet 39 solely by gravity. To ensure the liquid delivery channel 121 is emptied as completely as possible, it is particularly advantageous to suitably position the pump inlet 39 at the lowest point of the pump unit 19. This avoids residual water remaining in the liquid delivery channel 121 of the housing 35 of the pump unit 19 when the drive motor 42 stops its impeller 41. Thus, when the rinsing tank switches from one sub-rinsing step of the dishwashing process to the next sub-rinsing step, such as a cleaning step, or an intermediate rinsing step or a cooling step, there is almost no or even no so-called dirty water and / or alkaline solution being introduced. This is because, now, when switching rinsing tanks, the rinsing fluid for the corresponding sub-rinsing step can at least almost completely flow out of the pump unit 19 and be removed from the hydraulic circuit, especially by means of (… Figure 2 , 3The evacuation pump (not shown) empties the pump sump 16 to remove it and delivers fresh rinsing fluid, particularly fresh water, to the hydraulic circuit 33 for the next sub-rinse step. This fresh water does not mix with stagnant or residual water from the previous sub-rinse step. As a result, the rinsed and subsequently dried rinsed material G has fewer or no stains caused by dirt particles, scale particles, etc., thus achieving improved rinsing results. In particular, the intermediate rinsing step described above can now be performed with a smaller volume of fresh water or even eliminated entirely if necessary between the cleaning and rinsing steps, because rinsing away residual or stagnant water mixed with dirt particles and / or detergent from the pump unit 19 is no longer absolutely necessary.

[0198] Specifically, in the pump device 19 having a central axis 20 oriented along the direction of gravity g, the pump inlet or suction opening 39 is centered relative to the motor shaft 43, which is at least substantially vertically aligned, and the impeller 41 concentrically attached thereto, i.e., its suction direction preferably extends substantially vertically from bottom to top, wherein the central axis preferably corresponds to the axis of rotation of the motor shaft 43 for the impeller 41. Thus, when the drive motor 42 for the drive shaft 43 of the impeller 41 switches from its on state to its off state, the flushing fluid F present in the liquid delivery channel 121, i.e., the liquid guiding cavity of the housing 35, can flow out from the pump inlet 39 particularly quickly and completely from top to bottom.

[0199] The pump device 19 suitably has a liquid delivery passage 121 with a fluid-guiding geometry in the shape of its wall boundary, which guides the flushing fluid continuously upward from bottom to top, particularly from the inlet opening 122 of the pump inlet 39, to fluid outlets, such as 51, 52, 53, and 54, which can be opened by means of a distributor 23, particularly a distributor element 57, and to which flushing fluid F can be applied. An impeller 41 for delivering the flushing fluid F is rotatably arranged in the pump chamber. This improves the hydraulic efficiency of the pump device 19. Furthermore, when the drive motor 42 associated with the impeller 41 of the pump device is disconnected, the pump device can be emptied, in particular, at least almost completely. Therefore, the flushing fluid F in the housing 35 of the pump device 19 is retained as dead water or residual water in areas such as the horizontal surface of the plane, or the recess, sink, etc., which are minimized or completely absent, after the drive motor 42 provided for the impeller is cut off.

[0200] Specifically, the pump assembly 19 conveys the flushing fluid F from the pump inlet 39, particularly after exiting the pump chamber 119 with the impeller 41, primarily in a preferred direction, i.e., at least substantially parallel to the central axis 20, from bottom to top. Within the housing of the pump assembly 19, at or within the boundary wall of the liquid delivery passage 121, there is no lateral horizontal plane, or even a lower limit, that would allow the flushing fluid to remain on this horizontal plane or recess when the drive motor 42 of the impeller 41 stops. Therefore, when the drive motor 42 of the impeller 41 is engaged, i.e., when the pump assembly 19 is in delivery operation, air inclusions in the liquid delivery passage 121 are at least almost entirely avoided.

[0201] Advantageously, the pump inlet 39, the pump chamber 119, and the water distribution element 57 in the upper section of the impeller 41, diffusion and / or pressure chamber 92, and / or pressure and / or diffusion chamber 92, which is rotatably disposed therein, especially in its through-section, are arranged and configured with rotational symmetry relative to the central axis 20. When the impeller 41 is driven to rotate by the drive motor 42, this helps to ensure the least possible hydraulic resistance to the flushing fluid F conveyed or pumped from bottom to top by the impeller 41 within the liquid delivery passage 121c. The structure and design of the pump device 19 are also simplified by the rotational symmetry of its functional sections or units.

[0202] The fluid outlets, such as 51, 52, 53, and 54, are suitably configured in a tubular or nozzle shape, and their outlet openings, such as A51, A52, A53, and A54, are specifically arranged at one or more of the highest points of the liquid delivery passage 121 of the pump device 19, which leads from the pump inlet 39 to the fluid outlet. This optimizes the hydraulic efficiency of the pump device 19. This is because the rotary-driven impeller 41 conveys the flushing fluid F through the pressure and / or diffusion chamber 92 from bottom to top, continuing its upward-oriented forward motion parallel to the central axis 20 through the fluid outlets, such as 51, 52, 53, and 54, which are opened by means of the water-dividing element 57. Thus, the hydraulic resistance of the flushing fluid F flowing from the pressure and / or diffusion chamber 92 into one or more fluid outlets opened by means of the water-dividing element 57, i.e., 51, 52, 53, 54, can be kept low or minimal, unlike that in the fluid outlets extending radially outward from the pressure and / or diffusion chamber 92. Furthermore, when the pump device 19 is filled with flushing fluid F via its pump inlet 39, which is fluidly connected to the pump sump 16 (when the drive motor 42 for the impeller 41 is stopped and / or running) and / or when the drive motor 42 is continuously running, complete upward venting of the liquid delivery passage 121 is ensured. This means that the liquid delivery passage 121 in the housing 35 of the pump device 19, which guides from the pump inlet 39 to the fluid outlets opened by means of the water-dividing element 57, flows upward completely filled with flushing fluid, since there are no air chambers in the upper region of the housing 35 of the pump device 19, as would occur with the radially extending fluid outlets. Continuous complete venting of the pump device 19 is highly advantageous for its proper pumping and delivery operation. Maintain full hydraulic efficiency at all times. Additionally, avoid disruptive exhaust noise.

[0203] The pump device 19, which is at least almost entirely configured as a "vertical rotor," is characterized in particular by the fact that, when its liquid delivery passage 121 is filled with flushing fluid F, the air present in the housing 35 therein is automatically discharged upward by the rising flushing fluid level and can escape from the housing via one or more upwardly oriented, particularly protruding, fluid outlets opened by means of a water-dividing element 57, namely, for example, 51, 52, 53, 54. Here, the liquid delivery passage 121 extends from the pump inlet 39 of the pump device 19 to the outlet openings of the fluid outlets opened by the water-dividing element 57, namely, the open fluid outlets, namely, for example, A51, A52, A53, A54. Here, the liquid delivery passage includes the pump chamber 119 of the pump device 19 and the impeller 41 disposed therein between the pump inlet 39 and the corresponding open fluid outlets, namely, 51, 52, 53, 54, and the pressure and / or diffusion chamber 92 arranged downstream. Specifically, when the cavity of the liquid delivery channel 121 is completely filled with flushing fluid F, all air is discharged upward from the liquid delivery channel 121, i.e., from the liquid-guiding cavity of the housing 35 of the pump device 19. Here, when the pump device 19 is filled with flushing fluid F, the motor shaft 43 with impeller 41 can also be stationary, i.e., the drive motor 42 for shaft 43 can be shut off. During commissioning or starting of drive motor 42 and / or, of course, during the continuous delivery operation of pump device 19, air bubbles that may be present in the liquid delivery channel 121 of housing 35 are carried or transferred by the upward-flowing flushing fluid and are always reliably expelled from the housing of the pump device according to the invention via one or more upward-oriented fluid outlets, i.e., 51, 52, 53, 54, opened by means of water-dividing element 57, wherein the pump device then pumps the flushing fluid F from bottom to top against the direction of gravity g by means of impeller or impeller 41 in its pump chamber 119. Therefore, in the pump assembly 19, air can always escape completely upward from the pump housing 35 via fluid outlets oriented along the central axis 20, preferably vertically projecting, such as 51, 52, 53, 54, thus ensuring complete venting of the housing 35 of the pump assembly 19. Advantageously, the pump assembly can retain a vane-less design, saving a component.

[0204] Figure 13 A schematic top view of one embodiment of the blank 111 of the stator 50 for the rotor drive motor 42 and the stator 80 for the distributor driver 76 is shown. Figure 14 A top view of an apparatus 112 is shown, comprising a first stator lamination, particularly stator lamination group 113, associated with stator 50, and a second stator lamination, particularly stator lamination group 114, associated with stator 80.

[0205] The device 112, consisting of two stator laminations, particularly stator lamination groups 113 and 114, is made from a common blank 111. The blank 111 can be circular. However, the blank 111 can have virtually any geometry. The device 112 can be manufactured from the blank 111, particularly by means of a stamping method. In manufacturing the device 112, the first stator lamination, particularly stator lamination group 113, and the second stator lamination, particularly stator lamination group 114, are preferably manufactured simultaneously, particularly by stamping simultaneously from a common blank, i.e., 111. The stator 50 suitably includes a group of first stator laminations 113. Correspondingly, the stator 80 suitably includes a group of second stator laminations 114. The respective stator lamination groups have multiple metal sheets, particularly electrical sheets, layered or stacked on top of each other.

[0206] The first stator lamination, particularly the stator lamination group 113, has a surrounding annular section, particularly a circular annular section 115, as its geometry, from which a plurality of foot sections or teeth 116 extend radially inward. Here, the teeth 116 are preferably evenly distributed around the circumference of the annular section, i.e., each pair of adjacent teeth 116 in the circumferential direction has the same circumferential angular offset. Therefore, there is a radially inwardly open slot between each pair of adjacent teeth 116. Each tooth 116 is preferably wound later in time using turns of an electrical coil to manufacture the stator 50 of the drive motor 42. At the foot sections or teeth 116, the first stator lamination, particularly the stator lamination group 113, has an inner diameter di. The second stator lamination, particularly the stator lamination group 114, also has a surrounding annular section, particularly a circular annular section 117, as its geometry, from which a plurality of foot sections or teeth 118 extend radially inward. Here, the teeth 118 are preferably evenly distributed around the circumference of the annular section, i.e., each pair of adjacent teeth 118 along the circumferential direction has the same circumferential angular offset. Therefore, there is a radially inwardly open slot between each pair of adjacent teeth 118. Each tooth 118 is preferably wound with turns of an electric coil in a winding process performed later in time to manufacture the stator 80 of the distributor drive 76. The annular section 117 has an outer diameter da, which is equal to or less than the inner diameter di, such that the second stator laminations, in particular the stator lamination group 114, are arranged within the first stator laminations, in particular the stator lamination group 113. In other words, the first stator laminations, in particular the stator lamination group 113, of the stator 50 of the drive motor 42 are substantially concentrically arranged around the second stator laminations, in particular the stator lamination group 114, of the stator 80 of the distributor drive 76.

[0207] Therefore, it is feasible to manufacture, in particular, the stator laminations of the stator 50 of the drive motor 42, especially the stator lamination group 113, and the stator laminations of the stator 80 of the distributor driver 76, especially the stator lamination group 114, respectively, from the same blank 111, with the desired geometry, particularly by stamping from the blank. For this purpose, the dimensions of the stator 80 of the distributor driver 76 are designed such that it is smaller than or equal to the stator cutout in the middle of the stator 50 of the drive motor 42, and then this stator forms the stator 80 for the distributor driver 76. Therefore, it is preferably possible to manufacture the stator laminations, especially the stator lamination group, of the stator 50 for the drive motor 42 and the stator laminations, especially the stator lamination group, of the stator 80 for the distributor driver 76 in a single process step. Here, the scrap material of the stator laminations can be significantly reduced.

[0208] Since manufacturing a household dishwasher 1 always requires a pump unit 19 and a water distribution drive 76 in pairs, this simplifies manufacturing and reduces costs. This can be similarly applied to the combination of the stator 50 of the drive motor 42 and the stator of the lye pump.

[0209] Therefore, it is feasible to use the stamping waste generated during the manufacture of the stator 50 of the drive motor 42 to manufacture the stator of another motor, currently the distributor drive 76, thus saving materials. In particular, it is possible to manufacture two stator stamping kits simultaneously in a single process step, which saves manufacturing costs. Only one stamping kit tool is needed for this, thereby also reducing investment costs. Advantageously, resource savings are achieved in terms of material consumption.

[0210] Therefore, generally speaking, the geometry of the first stator lamination, especially the stator lamination group, used for the stator of the first drive motor, and the stator lamination, especially the stator lamination group, used for the stator of the second drive motor, with a relatively smaller diameter geometry, are particularly produced by stamping from the same blank.

[0211] Figure 15 Showing the pump device 19 relative to Figure 3 A schematic cross-sectional view of a modified implementation. (Compared to...) Figure 3 The difference lies here, in Figure 15In this embodiment, the housing 35 of the pump device 19 has an integral outer housing component 367 that defines the liquid delivery channel 121 outwardly, particularly except for the fluid outlets, such as 51-54, with at least nearly rotational symmetry relative to the central axis 20. Now, at least one tubular heating element RH is disposed in the liquid delivery channel 121, replacing the tubular heating element 40. This further simplifies the structure or design of the pump device according to the invention. It is sufficient for the housing 35 of the pump device 19 to consist of only two components: the outer housing component 367 and the inner housing component 38. In all cases, a cover component DE can also be provided, by which the upper opening of the inner housing component 38 can be closed. For the sake of simplicity, in... Figure 15 The cover component DE is indicated only by dashed lines. This reliably protects the stator 50, located within the housing inner component 38 between its first receiving section 45 and second receiving section 48, from moisture and / or flushing fluid. The housing outer component 367 and the housing inner component 38 introduced or immersed therein can be mechanically connected to each other, for example, by snap-fit ​​connections, locking connections, and / or bayonet connections and / or other couplings. Furthermore, the placement of at least one tubular heating element RH in the liquid delivery channel 121 formed between the housing inner component 38 and the housing outer component 367 causes an improvement in heat transfer between the tubular heating element RH and the flushing fluid F, which is delivered from bottom to top through the liquid delivery channel 121 by means of the impeller or pump wheel 41 of the pump device 19.

[0212] Specifically, the second receiving section 48 forms at least one subsection of the inner boundary wall of the liquid transport channel 121.

[0213] The tubular heating element RH is suitably positioned downstream of the impeller 41 of the pump unit 19, observed along its flow path in the liquid delivery channel 121, and is arranged at least almost rotationally symmetrically with respect to the central axis 20, preferably at least almost concentrically with respect to the second receiving section 48. This tubular heating element is suitably arranged symmetrically with respect to the central axis or central axial direction of the liquid delivery channel 121, which is preferably an annular cylindrical structure, such that, when viewed in the corresponding through-section of the liquid delivery channel 121, the flushing fluid F flowing therein receives at least approximately the same gap width between the tubular heating element RH and the inner boundary wall of the liquid delivery channel 121 formed by the inner housing component 38, and between the tubular heating element RH and the outer boundary wall of the liquid delivery channel 121 formed by the outer housing component 367. Therefore, the flushing fluid F delivered can flow through the tubular heating element RH with a largely uniform flow, which facilitates the transfer of heat from the tubular heating element to the flushing fluid flowing through it.

[0214] In particular, it is sufficient and / or advantageous that the tubular heating element RH is arranged in the liquid delivery channel 121 with only approximately one turn or a loop section, and around the central axis 20, preferably around the second receiving section 48 of the housing inner component 38. This minimizes or largely prevents damage to flow conditions through the tubular heating element RH in the liquid delivery channel 121. Relatedly and / or structurally particularly advantageous, the loop section or turn of the tubular heating element RH is arranged at least substantially horizontally or in a plane orthogonal to the central axis 20. However, it is also feasible, for example, if higher heat transfer to the flushing fluid is required, for example, that the tubular heating element RH is arranged around the central axis 20 in the liquid delivery channel 121 with more than one turn.

[0215] The reference numerals used in the figures are:

[0216] 1. Household dishwasher

[0217] 2. Rinse the container

[0218] 3 doors

[0219] 4. Rinse Chamber

[0220] 5 Pivot axis

[0221] 6. Filling opening

[0222] 7. Bottom

[0223] 8 Top

[0224] 9. Rear wall

[0225] 10 Sidewalls

[0226] 11 Sidewalls

[0227] 12. Rinse material container

[0228] 13 Rinse material container

[0229] 14. Rinse contents container

[0230] 15. Base Carrier

[0231] 16 Pump Pool

[0232] 17. Pump pool outlet opening

[0233] 17' Pump tank discharge port or outlet connection

[0234] 18-sieve system

[0235] 19 Pump Equipment

[0236] 20 Central Axis

[0237] 21 (Liquid) Transfer Pump

[0238] 22 Suction Connector

[0239] 23 Water distributor

[0240] 24 Spraying device

[0241] 25 Spraying device

[0242] 26 Spraying device

[0243] 27 Rotation axis

[0244] 28 Rotation axis

[0245] 29 Rotation axis

[0246] 30 supply lines

[0247] 31 Supply Line

[0248] 32 Supply Line

[0249] 33 Hydraulic Circuit

[0250] 34. Control and regulation devices

[0251] 35 Housing

[0252] 36. Lower housing components

[0253] 37. Components on the housing

[0254] 38 Internal components of the housing

[0255] 39 Pump inlet

[0256] 40 Tube Heating Element

[0257] 41 Impeller

[0258] 42 drive motors

[0259] 43 Drive shaft

[0260] 44 Rotors

[0261] 45. Accommodation section

[0262] 46. ​​Accommodation Room

[0263] 47. Enclosure

[0264] 48. Accommodation Section

[0265] 49. Accommodation Room

[0266] 50 stators

[0267] 51 Fluid Outlet

[0268] 52 Fluid outlet

[0269] 53 Fluid outlet

[0270] 54 Fluid outlet

[0271] 55 End cap

[0272] 56 Connecting Section

[0273] 57 water distribution plate

[0274] 58 Circular Disks

[0275] 59 Drive ring

[0276] 60 through hole

[0277] 61 Through Hole

[0278] 62 through holes

[0279] 63 Through Hole

[0280] 64. Guiding Section

[0281] 65. Guiding Section

[0282] 66. Guiding Section

[0283] 67. Empty space

[0284] 68. Empty space

[0285] 69. Empty space

[0286] 70 Base Section

[0287] 71. Teeth

[0288] 72 end side

[0289] 73 Drive components

[0290] 74 Drive components

[0291] 75 drive components

[0292] 76 water distribution drive

[0293] 77 Housing components

[0294] 78 Housing components

[0295] 79 Interior Space

[0296] 80 stator

[0297] 81 Rotor

[0298] 82 drive shafts

[0299] 83 worm gear

[0300] 84 Annular groove

[0301] 85 Guide Board

[0302] 86 Guide Board

[0303] 87 Guide Board

[0304] 88 Guide Board

[0305] 89 Drainage opening

[0306] 90 Fluid Chamber

[0307] 91 Connecting Section

[0308] 92 Diffusion Chamber

[0309] 93 Transition Section

[0310] 94 radius

[0311] 95 Inclined section

[0312] 96 radius

[0313] 97 radius

[0314] 98 radius

[0315] 99 radius

[0316] 100 Sealing device

[0317] 101 Accommodation Section

[0318] 102 Annular groove

[0319] 103 legs

[0320] 104 legs

[0321] 105 Deflection Section

[0322] 106 arrows

[0323] 107. Surface against the wall.

[0324] 108 radius

[0325] 109 Outside

[0326] 110 arrows

[0327] 111 Blank

[0328] Device 112

[0329] 113 Stator laminations, especially stator lamination assemblies

[0330] 114 Stator laminations, especially stator lamination assemblies

[0331] 115 Circular Section

[0332] 116 Foot segment

[0333] 117 Ring Section

[0334] 118 Foot Section

[0335] 119 Pump chamber or impeller chamber

[0336] 120 Annular gap space between the first receiving section and the second receiving section of the internal component of the housing.

[0337] 122 Pump inlet opening

[0338] 367 One-piece housing outer components

[0339] A. Extraction direction

[0340] A51-A54 fluid outlet 51-54 outlet opening

[0341] A92 pressure and / or diffusion chamber 92 outlet opening

[0342] AX Axial direction

[0343] Da outer diameter

[0344] DE cover components

[0345] Di inner diameter

[0346] E. Push direction

[0347] E51-E54 fluid outlet 51-54 inlet opening

[0348] F. Rinse the float with fresh water.

[0349] g direction of gravity

[0350] G Rinse

[0351] R radial direction

[0352] RH tubular heating element

[0353] U circumferential direction

[0354] UL guide section

[0355] S indicates the flow direction.

Claims

1. A household dishwasher (1) comprising a rinse container (2) for receiving rinsed items (G), a hydraulic circuit (33) for applying rinse fluid (F) to the rinsed items (G), and a pump device (19) having a liquid delivery channel (121) for circulating the rinse fluid (F) in the hydraulic circuit (33), wherein, The pump device (19) has a central axis (20) oriented along the direction of gravity (g), wherein the pump device (19) has a distributor (23) integrated in the housing (35) of the pump device (19), the distributor being used to selectively distribute the flushing fluid (F) to a plurality of fluid outlets (51, 52, 53, 54) of the pump device (19). Furthermore, at least one of the fluid outlets (51, 52, 53, 54), and especially all of them, are oriented along the central axis (20).

2. The household dishwasher according to claim 1, characterized in that, The water distributor (23) has a water distribution element (57) housed within the housing (35) and rotatable about the central axis (20), the water distribution element being used to selectively open and close the fluid outlets (51, 52, 53, 54).

3. The household dishwasher according to claim 2, Its features are, Viewed from bottom to top along the central axis (20), at successive height positions are provided: a pump inlet (39) of the pump device (19); a pump chamber (119) having an impeller (41) rotatable in the pump chamber for conveying the flushing fluid (F); a pressure and / or diffusion chamber (92) arranged downstream of the pump chamber (119); a water distribution element (57) in the upper end section of the pressure and / or diffusion chamber (92); and a plurality of fluid outlets (51, 52, 53, 54).

4. The household dishwasher according to claim 3, Its features are, The liquid delivery passage (121) of the pump device (19) is equipped with a fluid-guiding geometry of the wall boundaries (105, 40, 37, 48, UL, 51, 52, 53, 54) of the liquid delivery passage, which at least downstream of the pump chamber (119) guides the flushing fluid (F) continuously upward from bottom to top, particularly from the inlet opening (122) of the pump inlet (39) to the outlet openings (A51, A52, ...) of the fluid outlets (51, 52, 53, 54). A53, A54), the pump chamber is arranged downstream of the pump inlet (39) of the pump device (19) and houses the impeller (41) for rotatably conveying the flushing fluid, the outlet opening can be opened by means of the water distributor (23), in particular the water distribution element (57) and can be applied with flushing fluid (F).

5. The household dishwasher according to claim 3 or 4, Its features are, The pump inlet (39) is located at the lowest point of the pump device (19).

6. The household dishwasher according to at least one of claims 3 to 5, Its features are, The pump inlet (39), the pump chamber (119) having an impeller (41) rotatably disposed in the pump chamber, the pressure and / or diffusion chamber (92), and / or the water distribution element (57) in the upper end section of the pressure and / or diffusion chamber (92) are respectively arranged and designed to be rotationally symmetrical with respect to the central axis (20).

7. The household dishwasher according to at least one of claims 3 to 6, Its features are, The fluid outlets (51, 52, 53, 54) are respectively constructed in a tubular or nozzle shape, and the outlet openings (A51, A52, A53, A54) of the fluid outlets are particularly arranged at one or more of the highest points of the liquid delivery channel (121) of the pump device (19), which extends from the pump inlet (39) to the outlet openings (A51, A52, A53, A54) of the fluid outlets (51, 52, 53, 54).

8. The household dishwasher according to at least one of claims 2 to 7, Its features are, The water distribution element (57) has an annular disk (58) and a drive ring (59) for driving the annular disk (58), wherein the annular disk (58) has one or more through holes (e.g., 61, 62, 63), and by rotating the annular disk (58) by means of the drive ring (59), the through holes can be selectively assigned to the inlet openings (E51, E52, E53, E54) of a plurality of fluid outlets (51, 52, 53, 54), the through holes being particularly selectively associated with the inlet openings (E51, E52, E53, E54) of a plurality of fluid outlets (51, 52, 53, 54). E54) overlap.

9. The household dishwasher according to claim 8, Its features are, The drive ring (59) is coupled to the annular disk (58) in a force-transmitting manner along the rotation direction (U) of the drive ring.

10. The household dishwasher according to claim 9, Its features are, The annular disk (58) is coupled to the drive ring (59) such that when the impeller (41) is driven to rotate and delivers the flushing fluid (F) upward to the annular disk (58), the annular disk rises from the upper side of the drive ring (59) along the central axis (20) and floats upward onto the delivered flushing fluid (F), wherein the annular disk (58) remains coupled to the drive ring (59) in the direction of rotation (U).

11. The household dishwasher according to at least one of claims 8 to 10, Its features are, The annular disk (58) closes the outlet opening (A92) of the diffusion and / or pressure chamber (92).

12. The household dishwasher according to at least one of claims 8 to 11, Its features are, The drive ring (59) is housed in an annular groove (84) provided in the housing (35).

13. The household dishwasher according to claim 12, Its features are, The housing (35) has a drainage opening (89) facing the central axis (20). The drainage opening is fluidly connected to the annular groove (84).

14. The household dishwasher according to claim 12 or 13, Its features are, The drive ring (59) is rotatably supported on guide plates (85, 86, 87, 88) that extend radially into the annular groove (84).

15. A household dishwasher according to at least one of the preceding claims, Its features are, The water distributor (23) has a water distribution driver (76) for driving the drive ring (59), wherein the drive shaft (82) of the water distribution driver (76) is oriented transversely to, and in particular perpendicularly to, the central axis (20).

16. A household dishwasher according to at least one of the preceding claims, Its features are, The pump device (19) has a drive motor (42) having a rotor (44) for driving an impeller (41) of the pump device, the impeller being rotatable in the pump chamber (119) of the pump device (19), and the drive motor having a stator (50), wherein the rotor (44) is housed in a first receiving section (45) of the housing (35), and wherein the stator (50) is housed in a second receiving section (48) of the housing (35).

17. The household dishwasher according to claim 16, Its features are, The first receiving section (45) is arranged within the second receiving section (48).

18. The household dishwasher according to claim 16 or 17, Its features are, The second receiving section (48) concentrically surrounds the first receiving section (45) with a gap space (120) that is at least generally annular cylindrical, and the stator (50) is received in the gap space.

19. The household dishwasher according to at least one of claims 16 to 18, Its features are, The second receiving section (48) is guided through the water distribution element (57), and in particular the central opening (60) of the annular disk (58) of the water distribution element.

20. The household dishwasher according to at least one of claims 16 to 19, Its features are, In the housing (35), viewed along the radial direction (R) of the pump device (19), the pressure and / or diffusion chamber (92) of the pump device is defined by the second receiving section (48) and the tubular heating element (40) surrounding the second receiving section (48).

21. The household dishwasher according to claim 20, Its features are, The housing (35) has a lower housing component (36) and an upper housing component (37), wherein, when viewed along the central axis (20), the tubular heating element (40) is arranged between the lower housing component (36) and the upper housing component (37).

22. The household dishwasher according to at least one of claims 1 to 20, Its features are, The housing (35) has, in particular, an integral or one-piece housing outer component (367), which defines, outwardly and particularly up to the fluid outlet (51, 52), a liquid delivery channel (121) that is at least approximately rotationally symmetrical with respect to the central axis (20), and which houses at least one tubular heating element (RH).

23. The household dishwasher according to at least one of claims 16 to 22, Its features are, The housing (35) has a one-piece housing internal component (38), and the fluid outlet (51, 52, 53, 54), the first receiving section (45) and the second receiving section (48) are molded on the inner part of the housing.

24. The household dishwasher according to at least one of claims 3 to 23, Its features are, The pressure and / or diffusion chamber (92) is widened in the upper section of the pressure and / or diffusion chamber in the direction toward the water distributor (23).

25. A pump device (19) for a household appliance for guiding water, said pump device being particularly useful for a household dishwasher according to at least one of the preceding claims, wherein, The pump device has a central axis (20) oriented along the direction of gravity (g), wherein the pump device has a water distributor (23) integrated in the housing (35) of the pump device (19) for selectively distributing water to a plurality of fluid outlets (51, 52, 53, 54) of the pump device (19), and wherein at least one of the fluid outlets (51, 52, 53, 54), in particular all of them, is oriented along the central axis (20).

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