Domestic dishwasher

Abstract

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

Description

[0001] 202401691

[0002] 1 / 33

[0003] household dishwasher

[0004] The present invention relates to a household dishwasher.

[0005] A dishwasher has a wash tub into which items are placed for washing. Spray devices, such as rotating spray arms, can be provided in the wash tub to spray the items with wash water and / or fresh water. These spray devices are part of the dishwasher's hydraulic circuit. A pump sump is located at the bottom of the wash tub, to which a heating pump, also part of the hydraulic circuit, can be connected. The heating pump supplies the wash water and / or fresh water to the spray devices. Furthermore, the heating pump can introduce heat into the wash water and / or fresh water. For this purpose, the heating pump has a heating element.

[0006] The pump sump can be covered by a filter system. Such a filter system consists of a flat screen covering the pump sump and a fine screen. The filter system removes contaminants from the cleaning solution. To distribute the cleaning solution and / or fresh water to the spray devices, a water diverter can be used, which is installed downstream of the heating pump. The water diverter includes several fluid outlets that are connected to the spray devices. These fluid outlets can be routed laterally past the filter system.

[0007] Against this background, one object of the present invention is to provide an improved household dishwasher.

[0008] Accordingly, a household dishwasher is defined as having a wash tub, a pump sump attached to the wash tub, several spray devices arranged inside the wash tub for spraying wash liquor and / or fresh water onto the items held in the wash tub, a sieve system that covers at least part of the pump sump, and a heating pump for pumping the wash liquor and / or fresh water from the pump sump to the spray devices. 202401691

[0009] 2 / 33 directions proposed, wherein the heating pump has a heating pump housing with multiple fluid outlets that are in fluid communication with the spray devices, wherein an axis of rotation of exactly one spray device of the spray devices passes through exactly one fluid outlet of the fluid outlets, and wherein the axis of rotation passes through the sieve system.

[0010] Because the axis of rotation of the single spray direction runs through the single fluid outlet, it is possible to direct the flow to the single spray device. In particular, the center point of the single fluid outlet is oriented almost perfectly congruently with the inlet of the single spray device. Thus, the single fluid outlet and the inlet of the single spray device are aligned. Flow losses due to deflection of the rinsing solution and / or the fresh water are avoided or at least reduced.

[0011] The rinsing tank is preferably cuboid in shape. It ideally comprises a base, a top opposite the base, two opposing side walls, and a rear wall. A pivotable door is hinged to the rinsing tank opposite the rear wall. The pump sump is attached to the base of the rinsing tank. The pump sump can, for example, be a plastic component, particularly an injection-molded plastic component. Preferably, the spray devices are rotatably mounted within the rinsing tank.

[0012] Several spray devices may be provided. Preferably, the spray devices are spray arms. A lower spray device or under-basket spray arm, an upper spray device or over-basket spray arm, and a roof sprayer or roof spray head may be provided. Furthermore, so-called intensive spray zones may also be provided within the wash tub. The aforementioned single spray device may also be referred to as an under-basket spray device or under-basket spray arm. In other words, the single spray device is the aforementioned lower spray device. Accordingly, the single fluid outlet may also be referred to as an under-basket outlet. In particular, the under-basket spray arm may be rotatably mounted. The over-basket spray arm may also be rotatably mounted. 202401691

[0013] 3 / 33

[0014] The spray system allows the items in the wash tub to be moistened with fresh water and / or dishwashing solution. The items are arranged in several baskets, which can be pulled out of and pushed into the wash tub. These baskets may include a lower basket, an upper basket, and a cutlery drawer.

[0015] The screening system preferably comprises a flat screen arranged above the heating pump. The central axis preferably extends through the flat screen. The flat screen covers the pump sump, preferably from above, within the interior of the washing tank. It thus forms, in particular, a portion of the bottom wall of the washing tank. In addition to the flat screen, the screening system preferably comprises a fine screen. The fine screen is expediently arranged within the pump sump. The screening system allows contaminants to be filtered out of the washing solution and / or the fresh water. The flat screen preferably has an approximately circular geometry.

[0016] The heating pump is a key component of the hydraulic circuit in a household dishwasher. This hydraulic circuit may include spray devices, such as rotatable spray arms, in addition to the heating pump. The heating pump supplies these spray devices, located in the wash chamber of the dishwasher, with treatment fluid, i.e., wash liquor and / or fresh water. Simultaneously, the heating pump can introduce heat into the wash liquor and / or fresh water (i.e., the treatment fluid) using a heating element. Therefore, a "heating pump" in this context is defined as a pump capable of circulating wash liquor and / or fresh water within the hydraulic circuit, as well as supplying heat to the circulated wash liquor and / or fresh water. Circulation is achieved using an impeller.The impeller pumps the cleaning solution and / or fresh water from the fluid inlet to the fluid outlets during operation of the heating pump. Heat is supplied by the heating element, which is integrated into the heating pump. This heating pump can also be described as a compact heating pump. 202401691.

[0017] 4 / 33

[0018] The heating pump housing is preferably multi-part. For example, the heating pump housing can have a lower housing section and an upper housing section connected to the lower housing section. The impeller is located inside the heating pump housing, and in particular between the lower housing section and the upper housing section. Specifically, the impeller is positioned downstream of the fluid inlet. The impeller can be driven, in particular, by a drive motor of the heating pump. The drive motor is preferably an electric motor, in particular a BLDC (brushless DC) motor or a permanent magnet synchronous motor (PMSM). It can, in particular, be designed as a wet rotor. The drive motor is integrated into the heating pump. In particular, the drive motor can be rigidly connected to the upper housing section. The drive motor has a drive shaft which rotates about a central axis of the heating pump housing during operation. The drive shaft is coupled to the impeller.

[0019] The heating pump housing can be constructed, at least in sections, with rotational symmetry about its central axis. This means that parts of the housing can be rotationally symmetrical about the central axis, while other parts are not. The central axis can also be referred to as the axis of symmetry or axis of rotation of the heating pump housing. The heating pump is arranged or installed in the household dishwasher such that the central axis runs along or parallel to a direction of gravity. The central axis is therefore vertically oriented. The heating pump can thus also be called a vertical heating pump.

[0020] The fluid inlet can be fluidically connected to the pump sump of the household dishwasher. This allows the heating pump to draw in dishwashing liquid and / or fresh water from the pump sump. The fluid inlet is provided, in particular, on the lower part of the housing. The fluid inlet can be rotationally symmetrical about the central axis. In other words, the fluid inlet can be located centrally on the heating pump housing. The fluid inlet can be at least partially tubular or hollow cylindrical. The fluid inlet extends along the central axis. This means, in particular, that the fluid inlet runs parallel to the central axis. The fluid inlet is provided, in particular, on the underside of the heating pump housing. 202401691

[0021] 5 / 33 seen, whereas the fluid outlets are provided on the top of the heating pump housing.

[0022] The heating pump housing can have any number of fluid outlets. In particular, each of the aforementioned spray devices can be assigned such a fluid outlet. For example, three or four fluid outlets are provided. The fluid outlets are located on the upper part of the housing. The fluid outlets are tubular or hollow cylindrical and preferably run parallel to the central axis. The fluid outlets are spaced apart from the central axis when viewed along a radial direction of the heating pump. The fluid outlets can be arranged unevenly distributed around the central axis. The radial direction is oriented perpendicular to the central axis and points away from it.

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

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

[0025] According to another embodiment, the axis of rotation and the central axis are positioned parallel to each other and spaced apart from each other.

[0026] This means, in particular, that a distance is provided between the axis of rotation and the central axis. Specifically, the axis of rotation, viewed along the radial direction of the heating pump, is positioned at a distance from the central axis. 202401691

[0027] 6 / 33

[0028] According to another embodiment, a supply line to the single spray device runs centrally through a surface sieve of the sieve system.

[0029] The surface sieve can have a central opening through which the supply line runs. The axis of rotation of the single spray device also runs through this opening. In this case, the supply line is part of the single spray device. The single spray device can be rotatably mounted at the single fluid outlet by means of the supply line. The heating pump can have a pump sump housing that is connected to the upper part of the heating pump housing. The single spray device and its supply line can be rotatably mounted on the pump sump housing. The pump sump housing can be located between the heating pump housing and the supply line of the single spray device. The pump sump housing can also be part of the heating pump housing.

[0030] According to a further embodiment, the fluid outlets are grouped with the exception of exactly one fluid outlet, wherein exactly one fluid outlet and the grouped fluid outlets are arranged diametrically opposite each other on the heating pump housing, so that an annular cleaning area is formed on the filter system between exactly one fluid outlet and the grouped fluid outlets, which completely revolves around the axis of rotation.

[0031] In this context, "diametrically" means that the central axis of the heating pump housing is located between the grouped fluid outlets and the single fluid outlet. The annular cleaning area can be cleaned using a cleaning nozzle attached to the single spray device.

[0032] Given a specific outer diameter of the water diverter disc, the greatest possible distance can be ensured between the single fluid outlet through which the axis of rotation of a single spray device, in particular a rotatable lower spray arm, passes, and the grouped fluid outlets, thus maximizing the size of the annular cleaning zone of the surface screen of the screen system. This annular cleaning zone is cleaned by the liquid jet from a cleaning nozzle located on the single rotatable spray device, in particular on the 202401691

[0033] 7 / 33 lower rotatable spray arm, is provided, which preferably rotates 360° during rotation.

[0034] According to another embodiment, the grouped fluid outlets are arranged in a radially outer area of ​​the sieve system.

[0035] If the single fluid outlet through which the axis of rotation of the single spray device, in particular the rotatable lower spray arm, passes, is also located within the outer boundary of the surface screen, especially in its center, then all fluid outlets are advantageously provided within the surface screen of the screening system. The bottom wall of the rinsing tank can therefore remain free of one or more additional openings for fluid outlets. In particular, only a single opening can be provided in the bottom of the rinsing tank, to which the pump sump with the screening system is attached. This saves, in particular, additional assembly steps and sealing measures that would otherwise be necessary due to additional openings in the bottom wall of the rinsing tank for fluid outlets.

[0036] In particular, the grouped fluid outlets are positioned in a radially outer area of ​​the surface sieve. This allows for the greatest possible distance between the single fluid outlet and the grouped fluid outlets, thereby enabling the annular cleaning area to be realized with the greatest possible radial width, i.e., extension in the radial direction.

[0037] According to another embodiment, the grouped fluid outlets are located within a partial circle angle of the heating pump housing of less than 90°.

[0038] In other words, the grouped fluid outlets are placed as close together as possible.

[0039] According to a further embodiment, the grouped fluid outlets are located on a rear wall of the rinsing tank, such that the grouped fluid outlets are arranged between the exactly one fluid outlet and the rear wall, wherein the exactly one fluid outlet is positioned, in particular, in a six o'clock position, and wherein the grouped fluid outlets are positioned, in particular, in a twelve o'clock position. 202401691

[0040] 8 / 33

[0041] This positioning of the grouped fluid outlets allows supply lines from the grouped fluid outlets to the other spray devices to be routed to the rear wall as simply and briefly as possible.

[0042] According to another embodiment, the grouped fluid outlets and the exactly one fluid outlet are spaced at least 20 mm to 120 mm, preferably 50 mm to 90 mm, apart from each other.

[0043] This allows for the widest possible ring-shaped cleaning area. This improves the cleaning effect when cleaning the sieve system.

[0044] According to a further embodiment, the heating pump has a water diverter integrated into the heating pump housing for supplying selected fluid outlets with flushing liquor and / or fresh water by means of the water diverter, wherein the water diverter has a water diverter disc rotatably mounted in the heating pump housing, and wherein the water diverter disc has an outer diameter of greater than or equal to 95 mm, preferably between 105 mm and 130 mm.

[0045] The fluid outlets are, in particular, part of the water diverter integrated into the heating pump. The water diverter disc is, in particular, annular, preferably circular. The water diverter disc has perforations with several openings or through-holes, which are provided for the flow of cleaning fluid and / or fresh water. If the respective opening is positioned, by rotating the water diverter disc (upstream of the heating pump during operation), partially or completely overlapping the inlet cross-sectional area of ​​the respective fluid outlet, and thus its inlet cross-sectional area is partially or completely freely accessible from the supply chamber of the heating pump housing located upstream of the water diverter disc, i.e., open, the cleaning fluid and / or fresh water pumped by the rotating impeller during operation can flow into this fluid outlet and exit the heating pump through it.The openings allow for the selective opening or closing of individual fluid outlets or multiple outlets. This makes it possible to selectively supply individual spray devices with rinsing solution and / or fresh water using the water diverter, while simultaneously deactivating or closing other spray devices. (See 202401691.)

[0046] 9 / 33 If necessary, all spray devices can be supplied with rinsing solution and / or fresh water simultaneously. If necessary, all openings in the water diverter disc can also be closed.

[0047] The water diverter disc is arranged within the heating pump housing. Specifically, the water diverter disc is positioned between the lower and upper housing sections. The water diverter disc may be floatingly mounted. The water diverter disc can be driven, in particular rotated about its central axis, by means of a water diverter drive. The water diverter drive may include a drive ring coupled to the water diverter and a worm shaft for driving the drive ring. The water diverter drive comprises a drive motor. The drive motor may preferably be a BLDC (brushless DC) motor or a permanent magnet synchronous motor that is electrically commutated. This drive motor of the water diverter drive may, in particular, be designed as a wet rotor motor.

[0048] The fact that the water diverter is "integrated" into the heating pump housing means, in this case, that the water diverter is not a separate assembly from the heating pump, but rather that the water diverter is located within the heating pump housing and / or that the water diverter is at least partially formed by the heating pump housing. For example, the water diverter disc is located within the heating pump housing, and the fluid outlets, which are part of the water diverter, are also simultaneously part of the heating pump housing.

[0049] The fact that fluid outlets can be "selected" using the water diverter means, in this case, that certain fluid outlets can be opened and others closed by rotating the water diverter disc. This rotation of the water diverter disc can be carried out, for example, depending on the wash program currently being run in the household dishwasher.

[0050] According to an advantageous embodiment of the invention, the inner diameter of the annular, in particular circular, water diverter disc can preferably be increased to 202401691

[0051] 10 / 33 correspond at least to the radius of the circular cleaning area of ​​the surface sieve of the sieve system.

[0052] In particular, the fluid outlet associated with the lower rotatable spray arm, which projects upwards, preferably at least approximately vertically, and through which the axis of rotation of the lower rotatable spray arm runs, is aligned with the feed pipe of the lower rotatable spray arm, which extends upwards, preferably at least approximately vertically.

[0053] From a fluid dynamics perspective, it is particularly advantageous if the single fluid outlet through which the axis of rotation of a spray device, especially the rotatable lower spray arm, passes, and the group of fluid outlets at least almost diametrically opposite it, each form a flush extension of the supply chamber or annular gap upstream of the water diverter disc. Since the openings in the water diverter disc, which serve for the passage of cleaning solution and / or fresh water and for supplying the fluid outlets with cleaning solution and / or fresh water, are also located within the inner and outer boundary walls of the annular gap chamber when viewed in a cross-sectional plane perpendicular to the central axis of the heating pump housing, deflections in the flow of the cleaning solution and / or fresh water from the supply chamber into the one or more fluid outlets opened or released by the water diverter disc are largely avoided.

[0054] Other possible implementations of the household dishwasher also include combinations of features or embodiments described previously or subsequently with regard to the exemplary embodiments, even if not explicitly mentioned. In such cases, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the household dishwasher.

[0055] Further advantageous embodiments and aspects of the household dishwasher are the subject of the dependent claims and the exemplary embodiments of the household dishwasher described below. The household dishwasher is further explained below with reference to preferred embodiments and the accompanying figures. 202401691

[0056] 11 / 33

[0057] Fig. 1 shows a schematic perspective view of an embodiment of a household dishwasher;

[0058] Fig. 2 shows a schematic sectional view of the household dishwasher according to Fig. 1;

[0059] Fig. 3 shows a schematic sectional view of an embodiment of a heating pump for the household dishwasher according to Fig. 1;

[0060] Fig. 4 shows a schematic top view of the heating pump according to Fig. 3;

[0061] Fig. 5 shows a schematic bottom view of an embodiment of a water diverter for the heating pump according to Fig. 3; and

[0062] Fig. 6 shows a schematic top view of an embodiment of a bottom of a washing container for the household dishwasher according to Fig. 1.

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

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

[0065] The door 3 is shown in its open position in Fig. 1. The door 3 can be opened or closed by pivoting it about a pivot axis 5 provided at one lower end of the door 3. The door 3 can be used to open or close a loading opening 6 of the wash tank 2. The wash tank 2 has a bottom 7, a top 8 opposite the bottom 7, a rear wall 9 opposite the closed door 3, and two opposing... 202401691

[0066] 12 / 33 horizontally arranged side walls 10, 11. The base 7, the ceiling 8, the back wall 9 and the side walls 10, 11 can, for example, be made of stainless steel sheet. Alternatively, the base 7 can, for example, be made of a plastic material.

[0067] The household dishwasher 1 further comprises at least one dishware holder 12, 13, 14. Preferably, several, for example three, dishware holders 12, 13, 14 can be provided, wherein dishware holder 12 can be a lower dishware holder or a lower basket, dishware holder 13 an upper dishware holder or an upper basket, and dishware holder 14 a cutlery drawer. As further shown in Fig. 1, the dishware holders 12, 13, 14 are arranged one above the other in the wash tub 2. Each dishware holder 12, 13, 14 can be selectively moved into or out of the wash tub 2. In particular, each dishware holder 12, 13, 14 can be pushed or moved into the wash tub 2 in an insertion direction E and pulled or moved out of the wash tub 2 in an extension direction A opposite to the insertion direction E.

[0068] Figure 2 shows a highly schematic sectional view of the household dishwasher 1. Besides the wash tub 2, the household dishwasher 1 includes a base support 15, which supports the wash tub 2. The base support 15 is, for example, a plastic component, in particular an injection-molded plastic component. The base support 15 is box-shaped or cuboid. In the orientation of Figure 2, the direction of gravity g is oriented from top to bottom. The household dishwasher 1 is associated with a coordinate system with a horizontal direction (x-direction x), a vertical direction (y-direction y), and a horizontal direction (z-direction z). The directions x, y, and z are oriented perpendicular to each other.

[0069] A pump sump 16 is provided at the base 7. The pump sump 16 is pot-shaped and extends downwards from the base 7 in the orientation shown in Fig. 2. The pump sump 16 can be a plastic component, in particular an injection-molded plastic component. The pump sump 16 is covered by a sieve system 17. The sieve system 17 has a surface filter or a surface sieve 18 that covers the pump sump 16, in particular from the inside of the washing tank 2 at the bottom. 202401691

[0070] 13 / 33

[0071] Furthermore, the screening system 17 comprises a fine filter or fine screen 19, which is arranged at least partially within the pump sump 16. The fine screen 19 can be plate-shaped and separates the pump sump 16 into a raw area 20 and a clean area 21. Rinsing liquor and / or fresh water F can enter the raw area 20 and / or the clean area 21 through the flat screen 18. Furthermore, rinsing liquor and / or fresh water F can flow through the fine screen 19 from the raw area 20 to the clean area 21 and vice versa. The raw area 20 can also be referred to as the dirty area. The clean area 21 can also be referred to as the recirculation area.

[0072] A drain 22 opens from the pump sump 16, specifically from the pipe section 20. A dewatering pump or emptying pump 23 is connected to the drain 22. Using the dewatering pump 23, contaminated cleaning solution and / or fresh water F can be pumped out via a wastewater line 24. The wastewater line 24 can be connected to a stationary drain in a building.

[0073] Furthermore, a drain or connecting channel 25 opens from the pump sump 16, specifically from the clean area 21. The drain 25 can open from the bottom or side of the pump sump 16. A heating pump 26 is connected to the drain or connecting channel 25. The heating pump 26 circulates the wash liquor and / or fresh water F in the wash chamber 4. The heating pump 26 is designed to circulate the wash liquor and / or fresh water F. It is also designed to introduce heat into the wash liquor and / or fresh water F. The heating pump 26 can be mounted on the pump sump 16. The heating pump 26 is a compact heating pump and can therefore also be referred to as such.

[0074] In the orientation shown in Fig. 2, the heating pump 26 is arranged at the level of the pump sump 16 with respect to the direction of gravity g, so that flushing fluid and / or fresh water F can also drain from the heating pump 26 back into the pump sump 16 when the heating pump 26 is switched off. However, the heating pump 26 can also be arranged below the pump sump 16 or at least partially above the pump sump 16. 202401691

[0075] 14 / 33

[0076] The heating pump 26 is connected to a water diverter 27. The water diverter 27 is integrated into the heating pump 26. The water diverter 27 is therefore part of the heating pump 26. With the aid of the water diverter 27, it is possible to selectively distribute the rinsing solution and / or the fresh water F supplied by the heating pump 26 to different spray devices 28, 29, 30 provided in the rinsing tank 2. With the aid of the water diverter 27, the spray devices 28, 29, 30 can be selectively supplied with rinsing solution and / or fresh water F or not.

[0077] The spray devices 28, 29 can be rotatable spray arms, whereas the spray device 30 can be a roof-mounted sprayer or a roof-mounted shower head. Additionally, switchable intensive spray zones or one or more screen cleaning nozzles (not shown) can be provided. For example, the spray device 28, in particular a rotatable lower spray arm, is mounted below the dishware intake 12, rotatably about a pivot axis 31, on the base 7, on the pump sump 16, on the screen system 17, or on the heating pump 26. The spray device 28 has spray nozzles that spray the wash liquor and / or the fresh water F upwards into the dishware intake 12 and downwards towards the screen system 17, as shown in Fig. 2.

[0078] The spray device 29, in particular a rotatable upper spray arm, can be rotatably mounted on the dishware holder 13 about a pivot axis 32. The spray device 29 also has spray nozzles which are configured to spray the wash water and / or the fresh water F downwards and / or upwards in the orientation shown in Fig. 2. The spray device 30 can be rotatably mounted on the ceiling 8 about a pivot axis 33. The spray device 30 applies wash water and / or fresh water F to the dishware holder 14 from above in the orientation shown in Fig. 2.

[0079] The spray device 28 is connected to the heating pump 26, and in particular to the water diverter 27, via a supply line 34. The heating pump 26 can supply the spray device 28 with rinsing solution and / or fresh water F via the supply line 34.

[0080] A supply line 35 is assigned to the spray device 29, which fluidically connects the spray device 29 to the heating pump 26. The heating pump 26 can supply the spray device 29 with rinsing solution and / or fresh water F via the supply line 35. 202401691

[0081] 15 / 33

[0082] A supply line 36 is assigned to the spray device 30, which fluidically connects the spray device 30 to the heating pump 26. The heating pump 26 can supply the spray device 30 with rinsing solution and / or fresh water F via the supply line 36.

[0083] Each spray device 28, 29, 30 can have its own supply line 34, 35, 36. Alternatively, some of the spray devices 28, 29, 30 can share a common supply line that branches out. In particular, the supply lines 34, 35, 36 are formed by a common component, especially a common injection-molded plastic component. The supply lines 34, 35, 36 are routed along the rear wall 9 from the floor 7 towards the ceiling 8. The supply lines 34, 35, 36, or at least a portion of them, can pass through the sieve system 17.

[0084] The heating pump 26 preferably has a separate connection or fluid outlet for each supply line 34, 35, 36. The heating pump 26, the spray devices 28, 29, 30, and the supply lines 34, 35, 36 together form a hydraulic circuit 37 of the household dishwasher 1. The heating pump 26 circulates the wash liquor and / or the fresh water F in this hydraulic circuit 37. The heating pump 26 can be part of the hydraulic circuit 37, but this is not mandatory.

[0085] The household dishwasher 1 further comprises a control unit 38. Different wash programs of the household dishwasher 1 can be executed using the control unit 38. For this purpose, wash programs can be stored or saved in the control unit 38. The control unit 38 is preferably arranged outside the wash tub 2.

[0086] The control unit 38 can be located, for example, in or on the door 3 or in a base support below the wash tank 2. The control unit 38 can also be housed in the base support 15. The control unit 38 can be operated or controlled by means of operating elements not shown. These operating elements can include, for example, buttons, knobs, and / or touchscreens. These can be located on the door 3. 202401691

[0087] 16 / 33

[0088] The heating pump 26 can be controlled using the control unit 38. For example, the heating pump 26 can be switched on and off and / or its speed changed using the control unit 38. The control unit 38 can receive and evaluate information from the heating pump 26, such as its speed and / or motor current. Furthermore, the control unit 38 can also control the water diverter 27 to selectively switch the spray devices 28, 29, 30 on or off.

[0089] The items to be cleaned 39 are arranged in the washing container 2. These items 39 can include, for example, glasses, plates, pots, bowls, cutlery, or the like. In particular, the items 39 are held in the washing holders 12, 13, 14 (not shown in Fig. 2). The items 39 can be sprayed with washing solution and / or fresh water F by means of the spray devices 28, 29, 30.

[0090] Figure 3 shows a schematic sectional view of an advantageous embodiment of a heating pump 26 as previously mentioned. Figure 4 shows a top view of the heating pump 26. Reference is made hereafter to Figures 3 and 4 simultaneously.

[0091] The heating pump 26 has an axial direction AX, which, in the orientation shown in Fig. 3, extends from bottom to top (opposite the direction of gravity g). The axial direction AX can coincide with the y-direction y. In particular, the axial direction AX coincides with or is oriented parallel to a symmetry or central axis 40 of the heating pump 26. Furthermore, the heating pump 26 has a radial direction R. The radial direction R is perpendicular to and oriented away from the central axis 40. The axial direction AX and the radial direction R are thus perpendicular to each other. The heating pump 26 is therefore vertically oriented. The central axis 40 runs along the direction of gravity g or is oriented parallel to it.

[0092] The heating pump 26 has a heating pump housing 41 with a one-piece lower housing part 42 and a one-piece upper housing part 43. The lower housing part 42 and the upper housing part 43 can be plastic components, in particular injection-molded plastic components. The lower housing part 42 and the upper housing part 43 can be rusted or snapped together. However, a bayonet connection and / or a screw connection can also be provided. 202401691

[0093] 17 / 33

[0094] The lower housing part 42 has a fluid inlet 44 to which the outlet or connecting channel 25 is connected. For example, the outlet or connecting channel 25 is pushed onto the fluid inlet 44 and sealed against it by means of a sealing element, for example in the form of an O-ring. The heating pump housing 41 is essentially rotationally symmetrical about the central axis 40.

[0095] The lower housing part 42 and the upper housing part 43 are positively connected to each other (not shown). For this purpose, locking hooks, snap hooks, or the like may be provided, enabling a positive connection between the lower housing part 42 and the upper housing part 43. A positive connection is created by the interlocking or overlapping of two connecting parts, in this case the lower housing part 42 and the upper housing part 43.

[0096] The lower part of the housing 42 accommodates an impeller 45, which is located downstream of the fluid inlet.

[0097] The impeller 45 is arranged in Fig. 44. The impeller 45 is not shown in section in Fig. 3. The impeller 45 can be a vane or be described as such. The impeller 45 is driven by a drive motor 46. The drive motor 46 is an electric motor. The impeller 45 can also be described as an impeller. The drive motor 46 comprises a drive shaft 47 that is non-rotatably connected to the impeller 45 and rotates about the central axis 40 when the heating pump 26 is in operation. In addition to the impeller 45, a rotor 48 of the drive motor 46 is non-rotatably connected to the drive shaft 47.

[0098] The rotor 48 is rotatably mounted about the central axis 40 in a cup-shaped first receiving section 49 of the upper housing part 43. The first receiving section 49 encloses a receiving chamber 50 in which the rotor 48 is received. The receiving chamber 50 can be filled with rinsing solution and / or fresh water F. In the orientation shown in Fig. 3, the first receiving section 49 is oriented downwards, i.e., towards the impeller.

[0099] 45 is closed with a closure 51. The drive shaft 47 passes through the closure 51 and can be supported by it.

[0100] The drive motor 46 can, in particular, be a BLDC (brushless DC) motor or a permanent magnet synchronous motor (PMSM), especially a wet rotor motor, with a vertical orientation. The drive motor 46 with vertical orientation of the drive- 202401691

[0101] The 18 / 33 shaft 47 is integrated and / or embedded in the upper housing part 43. The drive motor 46 drives the impeller 45, which draws in the rinsing solution and / or the fresh water F from below, deflects it by 90°, and accelerates it outwards in the radial direction R.

[0102] In addition to the first receiving section 49, the upper part of the housing 43 includes a second receiving section 52. The second receiving section 52 is also cup-shaped. In contrast to the first receiving section 49, the second receiving section 52, in the orientation shown in Fig. 3, is open at the top rather than the bottom. The first receiving section 49 is located inside the second receiving section 52. The second receiving section 52 therefore has a larger diameter than the first receiving section 49.

[0103] An annular receiving chamber 53 is provided between the first receiving section 49 and the second receiving section 52. A stator 54 of the drive motor 46 is arranged in the receiving chamber 53. The stator 54 can be bonded to the first receiving section 49 and / or the second receiving section 52.

[0104] The lower housing section 42 has a plate-shaped base section 55 and a tubular or hollow cylindrical wall section 56. The fluid inlet 44 is provided on the base section 55. Both the base section 55 and the wall section 56 are rotationally symmetrical about the central axis 40. The base section 55 and the wall section 56 transition into each other by means of a circumferential radius 57 around the central axis 40. A connecting section 58, which also circumferentially 40, adjoins the wall section 56. The upper housing section 43 is connected to the lower housing section 42 at the connecting section 58.

[0105] The upper housing part 43 has several fluid outlets 59, 60, 61, 62. Supply lines 34, 35, 36 are connected to the fluid outlets 59, 60, 61, 62. If three spray devices 28, 29, 30 are provided, preferably exactly three fluid outlets 59, 60, 61, 62 are also provided. If, for example, four spray devices 28, 29, 30 are provided, four fluid outlets 59, 60, 61, 62 are accordingly provided. The fluid outlets 59, 60, 61, 62 are arranged unevenly around the central axis 40. The fluid outlets 59, 60, 61, 62 are oriented vertically upwards and thus along the central axis 40.

[0106] 19 / 33

[0107] Fluid outlets 59, 60, 61, and 62 are part of the water diverter 27. Therefore, the upper housing section 43 can be at least partially part of the water diverter 27. In this case, fluid outlet 59 is assigned to the spray device 28. Fluid outlet 60 is an additional or feature outlet, which, for example, may be assigned to an intensive spray zone (not shown) and is provided in addition to fluid outlets 59, 62, and 61 assigned to the spray devices 28, 29, and 30. Fluid outlet 61 is assigned to the spray device 30, and fluid outlet 62 is assigned to the spray device 29. However, the assignment can also be configured differently.

[0108] The fluid outlets 59, 60, 61, 62 are tubular and extend along the central axis 40 or along the axial direction AX. The fluid outlets 59, 60, 61, 62 can each have a circular, elliptical, or oval cross-section. During operation of the heating pump 26, flushing fluid and / or fresh water F can be discharged upwards via the fluid outlets 59, 60, 61, 62.

[0109] The fluid outlets 59, 60, 61, 62 extend from a closing plate 63 of the upper housing part 43, which closes off the end face of the upper housing part 43. A tubular or hollow cylindrical connecting section 64 runs around the closing plate 63, by means of which the upper housing part 43 is connected to the connecting section 58 of the lower housing part 42. The multiple fluid outlets 60, 61, 62 are arranged within a partial circular angle α of the pump housing 41. The partial circular angle α is less than 90°.

[0110] The upper housing part 43 further comprises a tubular or hollow cylindrical wall section 65, which is arranged within the wall section 56 of the lower housing part 42. The wall section 65 is, in particular, part of the second receiving section 52. The wall section 65 is rotationally symmetrical about the central axis 40. An annular gap or supply chamber 66 is formed between the two wall sections 56, 65, which is filled with flushing solution and / or fresh water F during operation of the heating pump 26. During operation of the heating pump 26, the flushing solution and / or fresh water F flows around the central axis 40 through the supply chamber 66, which is located upstream of the water diverter disc 72 in the direction of flow of the flushing solution and / or fresh water F.

[0111] 20 / 33

[0112] The heating pump 26 further comprises a heating element 67 for introducing heat Q into the flushing solution and / or the fresh water F. The heating element 67 is an electric heating element. The heating element 67 can be a tubular heating element or be described as such. The heating element 67 is annular and rotates at least partially around the central axis 40. The heating element 67 can be rotationally symmetrical about the central axis 40, at least partially. The heating element 67 is located below the supply chamber 66 and is surrounded by flushing solution and / or fresh water F during operation of the heating pump 26. Viewed along the axial direction AX, the heating element 67 is located at least partially at the level of the impeller 45.

[0113] The heating device 67 is associated with a plane of symmetry 68, with which the heating device 67 is symmetrically constructed. The plane of symmetry 68 intersects the central axis 40 and is arranged perpendicular to it. The plane of symmetry 68 also intersects the impeller 45. Furthermore, the plane of symmetry 68 can also intersect the drive shaft 47.

[0114] The heating device 67 has a metallic outer casing filled with a compressed magnesium oxide filling. A heating element, for example in the form of a heating wire, is embedded in the magnesium oxide filling. The heating element can be spirally wound. The outer casing can be made of stainless steel. Preferably, the heating device 67 is not circular in cross-section, but at least partially, particularly where it is exposed to rinsing liquor and / or fresh water, elliptical or oval. In this case as well, the heating device 67 is symmetrical about the plane of symmetry 68.

[0115] The heating element 67 is placed on spacer feet 69, 70, of which only two are shown in Fig. 3. These are preferably provided on the lower housing part 42, in particular on its bottom section 55. Any number of spacer feet 69, 70 can be provided, which can be arranged evenly distributed around the central axis 40. The spacer feet 69, 70 can be made, for example, of metal, plastic, or ceramic. If the spacer feet 69, 70 are made of metal or ceramic, they can be received in pockets that are integrally formed on the lower housing part 42. The spacer feet 69, 70 can also be overmolded with a material from which the lower housing part 42 is made. The spacer feet 69, 70 prevent 202401691

[0116] 21 / 33 a direct contact of the heating device 67 on the floor section 55, so that a complete flow around the heating device 67 with flushing liquor and / or fresh water F is possible.

[0117] The fluid inlet 44 forms, in particular, the lowest point of the heating pump 26. This allows the flushing solution and / or the fresh water F to drain completely from the heating pump 26 by gravity when the heating pump 26 is not in operation. This drainage of the flushing solution and / or the fresh water F is indicated in Fig. 3 by an arrow 71. The flushing solution and / or the fresh water F can thus flow back into the pump sump 16 by gravity. The heating pump 26 can therefore empty itself.

[0118] A water diverter disc 72, rotatable about the central axis 40, is arranged between the upper housing part 43, in particular the end plate 63, and the lower housing part 42. The water diverter disc 72 is part of the water diverter 27, which is shown in a bottom view in Fig. 5, i.e., looking from the fluid inlet 44 towards the fluid outlets 59, 60, 61, 62. The feed chamber 66 supplies the rinsing solution and / or the fresh water F to the water diverter disc 72.

[0119] The water diverter disc 72 is rotationally symmetrical about the central axis 40. The water diverter disc 72 has a central opening 73. The second receiving section 52 with the wall section 65 passes through the opening 73. The opening 73 is preferably circular. The water diverter disc 72 is annular.

[0120] Furthermore, the water diverter disc 72 has several openings 74, 75, 76 in its annular disc surface. By means of these openings 74, 75, 76, the fluid outlets 59, 60, 61, 62 can be selectively blocked or opened for flushing solution and / or fresh water by rotating the water diverter disc 72 about the central axis 40. In Fig. 3, for example, fluid outlet 59 is opened and fluid outlet 62 is blocked, so that flushing solution and / or fresh water F can only flow out through fluid outlet 59. 202401691

[0121] 22 / 33

[0122] The openings 74, 75, 76 can be circular. The openings 74, 75, 76 can also be elongated. Using the elongated geometry, it is possible to open several of the fluid outlets 59, 60, 61, 62 simultaneously. The number of openings 74, 75, 76 can correspond to the number of fluid outlets 59, 60, 61, 62. However, this is not mandatory. Using the water diverter disc 72, the fluid outlets 59, 60, 61, 62 can be combined in any way.

[0123] A water diverter drive 77, for example comprising a drive motor 78, is provided for rotating the water diverter disc 72 about the central axis 40. The water diverter 27 thus has the previously described water diverter disc 72 and the water diverter drive 77. The water diverter drive 77 has a drive ring 79 coupled to the water diverter disc 72 and a worm shaft 80 for driving the drive ring 79. The axis of rotation of the drive ring 79 is preferably arranged along the central axis 40, i.e., the drive ring 79 can be driven to rotate about the central axis 40. The drive motor 78 can preferably be a BLDC (brushless DC) motor or a permanent magnet synchronous motor that is electronically commutated. The drive motor 78 is housed in a drive housing 81. The drive motor 78 is located laterally and tangentially on the heating pump housing 41, in particular on the lower housing part 42.This drive motor 78 of the water switch drive can in particular be designed as a wet rotor.

[0124] The feed chamber 66 extends to the water diverter disc 72. The feed chamber 66 is rotationally symmetrical about the central axis 40. In this exemplary embodiment, the feed chamber 66 widens in front of the water diverter disc 72 and distributes the rinsing solution and / or the fresh water F onto the water diverter disc 72. Alternatively, the feed chamber 66 can also be bounded along its longitudinal extent from bottom to top by parallel wall sections 65, 56 of the upper housing part 43 and the lower housing part 42, meaning that its cross-sectional width (perpendicular to the central axis 40) is then at least approximately the same at every point along its height. The water diverter 27 and / or the water diverter disc 72 is integrated into the feed chamber 66. The fluid outlets 59, 60, 61, 62 open out of the feed chamber 66. 202401691

[0125] 23 / 33

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

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

[0128] Fig. 6 shows a schematic top view of the bottom 7 of the washing tank 2. A receiving area 82 for receiving the sieve system 17, in particular the flat sieve 18, is integrally formed on the bottom 7. The receiving area 82 can be part of the pump sump 16. The flat sieve 18 has a frame 83 that supports two fluid-permeable sieve elements 84, 85. The frame 83 comprises several web sections 86, of which only one is labeled with a reference numeral in Fig. 6. The web sections 86 extend radially inwards from an annular frame section 87 to a conical central section 88. The central section 88 includes a central opening 89. The web sections 86 divide the sieve elements 84, 85 into several windows.

[0129] The frame 83 has an opening 90 in which the fine screen 19 (not shown) is received. The frame 83, in particular frame section 87, has a cutout 91 that receives a pump sump housing 92. The frame section 87 thus surrounds the pump sump housing 92 in sections. The pump sump housing 92 is at least partially covered by the surface screen 18. The pump sump housing 92 is connected to the heating pump 26, in particular to the housing upper part 43, for example by screws. The pump sump housing 92 can be part of the heating pump 26, in particular of the heating pump housing 41. 202401691

[0130] 24 / 33

[0131] The pump sump housing 92 has several fluid outlets 93, 94, 95, 96. Fluid outlet 93 is connected to fluid outlet 59. Fluid outlet 94 is connected to fluid outlet 60. Fluid outlet 95 is connected to fluid outlet 61. Fluid outlet 96 is connected to fluid outlet 62. For example, fluid outlets 93, 94, 95, 96 are connected to fluid outlets 59, 60, 61, 62. A sealing element can be arranged between fluid outlets 93, 94, 95, 96 and fluid outlets 59, 60, 61, 62.

[0132] The heating pump 26 is arranged such that the fluid outlet 60, viewed along the y-direction y, is located directly below the fluid outlet 93. The spray device 28 can be associated with the fluid outlet 93. The spray device 28 can be rotatably mounted on the fluid outlet 93 about the axis of rotation 31. In this case, the supply line 34 is part of the spray device 28, for example, in the form of an under-basket spray arm. The fluid outlet 93 can pass through the opening 89. The supply lines 35, 36 can be connected to the fluid outlets 94, 95, 96. As mentioned previously, the fluid outlet 60, and thus also the fluid outlet 94, can be associated with an intensive spray zone (not shown).

[0133] The fluid outlets 59, 60, 61, 62, and thus also the fluid outlets 93, 94, 95, 96, are arranged such that the fluid outlet 59 or the fluid outlet 93 for supplying the spray device 28 with rinsing solution and / or fresh water F is positioned directly below an inlet opening of the spray device 28. The other fluid outlets 94, 95, 96 are all grouped together diametrically opposite the fluid outlet 93. This group of fluid outlets 94, 95, 96 is located at an outer edge of the surface screen 18. Preferably, the fluid outlets 94, 95, 96 are arranged on a partial circle angle β of less than 90° in a rear region of the rinsing tank 2 and thus occupy the smallest possible cutout 91 in the surface screen 18.

[0134] Due to the aforementioned grouped positioning of the fluid outlets 94, 95, 96, a free cleaning area 97 is created between the fluid outlet 93 and the fluid outlets 94, 95, 96, which is shown hatched in Fig. 6. The cleaning area 97 is annular and can be used to clean the surface sieve 18 with the aid of a cleaning nozzle arranged on the spray device 28, by applying pressure to the surface sieve 18.

[0135] 25 / 33 The dirt deposited on the surface sieve 18 is conveyed in a circular motion into the pump sump 16. This ensures that coarse dirt particles can be conveyed directly into the pump sump 16 without having to be broken down or loosened by chemicals or mechanical means. This functionality saves cleaning time, chemicals, and energy without compromising cleaning performance.

[0136] This geometric arrangement of the fluid outlets 93, 94, 95, 96 then generates a corresponding perforation in the form of the openings 74, 75, 76 in the water diverter disc 72 of the water diverter 27. In order to achieve the required distance between the fluid outlet 93 and the other fluid outlets 94, 95, 96, the water diverter disc 72 preferably has a diameter of at least 95 mm, more preferably a diameter of 100 mm to 130 mm. This results in the cleaning area 97, through which dirt can be conveyed unhindered by the cleaning nozzle of the spray device 28 and transported into the pump sump 16 without being loosened by chemicals or the mechanics of the household dishwasher 1.

[0137] This enables the implementation of a self-cleaning sieve system 17. Program run times can be reduced. Savings in energy, fresh water, and chemicals are possible. A very compact design results. A reduced number of parts and thus lower complexity can be achieved. A reduced number of large pressurized seals and optimized assembly through a single vertical assembly movement are possible. Only one opening for the pump sump 16 in the base 7 of the rinsing tank 2 is required. Hydraulic losses are reduced. An optimized system efficiency of the hydraulic circuit 37 can be achieved.

[0138] Although the present invention has been described using exemplary embodiments, it can be modified in many ways. 202401691

[0139] 26 / 33

[0140] Reference symbols used:

[0141] 1 household dishwasher

[0142] 2 washing containers

[0143] 3 Door

[0144] 4. Dishwashing area

[0145] 5 swivel axes

[0146] 6 Feed opening

[0147] 7 Floor

[0148] 8 ceiling

[0149] 9 Back panel

[0150] 10 side wall

[0151] 11 Side wall

[0152] 12 Dishwashing tray

[0153] 13 Dishwashing tray

[0154] 14 Dishwashing tray

[0155] 15 base carriers

[0156] 16 Pump sump

[0157] 17 Sieve system

[0158] 18 surface sieve

[0159] 19 fine sieve

[0160] 20 Raw area

[0161] 21 Cleanroom

[0162] 22 Procedure

[0163] 23 Drain pump

[0164] 24 Wastewater pipe

[0165] 25 Procedure

[0166] 26 Heating pump

[0167] 27 Water diverter

[0168] 28 Spray device

[0169] 29 Spray device

[0170] 30 Spray device

[0171] 31 Rotation axis

[0172] 32 Rotary axis 202401691

[0173] 27 / 33

[0174] 33 Rotation axis

[0175] 34 Supply line

[0176] 35 Supply line

[0177] 36 Supply line

[0178] 37 Hydraulic circuit

[0179] 38 Control unit

[0180] 39 items washed

[0181] 40 Center axis

[0182] 41 Heating pump housings

[0183] 42 Lower housing part

[0184] 43 Housing top

[0185] 44 Fluid inlet

[0186] 45 wheel

[0187] 46 Drive motor

[0188] 47 Drive shaft

[0189] 48 Rotor

[0190] 49 Recording section

[0191] 50 recording room

[0192] 51 Closure

[0193] 52 Recording section

[0194] 53 Recording room

[0195] 54 Stator

[0196] 55 floor section

[0197] 56 Wall section

[0198] 57 Rounding

[0199] 58 Connecting section

[0200] 59 Fluid outlet

[0201] 60 Fluid outlet

[0202] 61 Fluid outlet

[0203] 62 Fluid outlet

[0204] 63 End plate

[0205] 64 Connecting section

[0206] 65 wall section

[0207] 66 Feed room 202401691

[0208] 28 / 33

[0209] 67 Heating system

[0210] 68 Plane of symmetry

[0211] 69 feet of space

[0212] 70 feet

[0213] 71 Arrow

[0214] 72 Water switch disc

[0215] 73 Breakthrough

[0216] 74 Breakthrough

[0217] 75 Breakthrough

[0218] 76 Breakthrough

[0219] 77 Water switch drive

[0220] 78 Drive motor

[0221] 79 Drive ring

[0222] 80 worm shaft

[0223] 81 Drive housing

[0224] 82 Recording area

[0225] 83 frames

[0226] 84 sieve element

[0227] 85 sieve element

[0228] 86 Bridge section

[0229] 87 Frame section

[0230] 88 Middle section

[0231] 89 Breakthrough

[0232] 90 opening

[0233] 91 Excerpt

[0234] 92 Pump sump housings

[0235] 93 Fluid outlet

[0236] 94 Fluid outlet

[0237] 95 Fluid outlet

[0238] 96 Fluid outlet

[0239] 97 Cleaning area

[0240] A Extraction direction

[0241] AX Axial direction 202401691

[0242] 29 / 33 E Insertion direction

[0243] F F Rinsing liquid and / or fresh water g Gravity direction

[0244] Q Heat

[0245] R Radial direction S Flow direction x x-direction y y-direction z z-direction a Partial circle angle ß Partial circle angle

Claims

202401691 30 / 33 PATENT CLAIMS 1. Household dishwasher (1) comprising a wash tub (2), a pump sump (16) attached to the wash tub (2), several spray devices (28, 29, 30) arranged within the wash tub (2) for spraying wash liquor and / or fresh water (F) onto items (39) held in the wash tub (2), a sieve system (17) which covers at least part of the pump sump (16), and a heating pump (26) for pumping the wash liquor and / or fresh water (F) from the pump sump (16) to the spray devices (28, 29, 30), wherein the heating pump (26) has a heating pump housing (41) with several fluid outlets (59, 60, 61, 62) which are in fluid communication with the spray devices (28, 29, 30), wherein a rotary axis (31) is connected to exactly one spray device (28) the spray devices (28, 29, 30) passes through exactly one fluid outlet (59) of the fluid outlets (59, 60, 61, 62), and wherein the axis of rotation (31) passes through the sieve system (17).

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

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

4. Household dishwasher according to one of claims 1 - 3, characterized in that a supply line (34) of exactly one spray device (28) runs centrally through a surface sieve (18) of the sieve system (17). 202401691 31 / 33 5. Household dishwasher according to one of claims 1 - 4, characterized in that the fluid outlets (60, 61, 62) are grouped with the exception of the exactly one fluid outlet (59), wherein the exactly one fluid outlet (59) and the grouped fluid outlets (60, 61, 62) are arranged diametrically opposite each other on the heating pump housing (41), so that an annular cleaning area (97) is formed on the sieve system (17) between the exactly one fluid outlet (59) and the grouped fluid outlets (60, 61, 62), which rotates completely around the axis of rotation (31).

6. Household dishwasher according to claim 5, characterized in that the grouped fluid outlets (60, 61, 62) are arranged in a radially outer region of the sieve system (17).

7. Household dishwasher according to claim 5 or 6, characterized in that the grouped fluid outlets (60, 61, 62) are located within a partial circle angle (a) of the heating pump housing (41) of less than 90°.

8. Household dishwasher according to one of claims 5 - 7, characterized in that the grouped fluid outlets (60, 61, 62) are located on a rear wall (9) of the wash container (2), such that the grouped fluid outlets (60, 61, 62) are arranged between the exactly one fluid outlet (59) and the rear wall (9), wherein the exactly one fluid outlet (59) is positioned in particular in a six o'clock position, and wherein the grouped fluid outlets (60, 61, 62) are positioned in particular in a twelve o'clock position.

9. Household dishwasher according to one of claims 5 - 8, characterized in that the grouped fluid outlets (60, 61, 62) and the exactly one fluid outlet (59) are arranged at least 20 mm to 120 mm, preferably 50 mm to 90 mm, apart from each other.

10. Household dishwasher according to one of claims 1-9, characterized in that the heating pump (26) has a water diverter (27) integrated into the heating pump housing (41) for supplying selected fluid outlets (59, 60, 61, 62) with washing liquor and / or fresh water (F) by means of the water diverter (27). 202401691 32 / 33, wherein the water diverter (27) has a water diverter disk (72) rotatably mounted in the heating pump housing (41), and wherein the water diverter disk (72) has an outer diameter greater than or equal to 95 mm, preferably between 105 mm and 130 mm.

Images