Heat pump, domestic dishwasher, and control unit for operating a heat pump

Abstract

The invention relates to a heat pump (26) for a domestic dishwasher (1), comprising a heat pump housing (41), an impeller (45) mounted within the heat pump housing (41) for conveying washing liquor and / or fresh water (F) from a fluid inlet (44) of the heat pump housing (41) to a plurality of fluid outlets (59, 60, 61, 62) of the heat pump housing (41), and a water diverter (27) integrated into the heat pump housing (41) for supplying washing liquor and / or fresh water (F) to water outlets (59, 60, 61, 62) selected using the water diverter (27), wherein the impeller (45) is mounted in the heat pump housing (41) so as to be rotatable about a central axis (40) of the heat pump housing (41), the water diverter (27) has a water diverter drive (77) which is designed to rotate a water diverter disc (72) of the water diverter (27), the water diverter disc being mounted so as to be rotatable in the heat pump housing (41), in order to release or block selected fluid outlets of the plurality of fluid outlets (59, 60, 61, 62), and the water diverter disc (72), with the aid of the water diverter drive (77), can be rotated clockwise or counterclockwise into different positions (P1, P2, P3, P4, P5, P6, P7, P8, P9, P10).

Description

[0001] Heating pump, household dishwasher and control unit for operating a heating pump

[0002] The present invention relates to a heating pump for a household dishwasher, a household dishwasher with such a heating pump and a control unit for operating such a heating pump.

[0003] 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 can be connected; this pump is also part of the hydraulic circuit. 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.

[0004] To distribute the cleaning solution and / or fresh water to the spray nozzles, a water diverter can be used, which is connected downstream of the heating pump. The water diverter allows for the control of multiple fluid outlets, with each outlet corresponding to a spray nozzle. For this purpose, the water diverter has a diverter disc with several openings for selectively opening and closing individual fluid outlets. A sensor, in the form of a simple switch, is required to detect the position of the diverter disc; this sensor is actuated by a actuator or a cam.

[0005] Against this background, one object of the present invention is to provide an improved heating pump for a household dishwasher. Accordingly, a heating pump for a household dishwasher is proposed comprising a heating pump housing, an impeller arranged within the heating pump housing for pumping wash liquor and / or fresh water from a fluid inlet of the heating pump housing to several fluid outlets of the heating pump housing, and a water diverter integrated into the heating pump housing for supplying selected fluid outlets with wash liquor and / or fresh water. The impeller is rotatably mounted in the heating pump housing about a central axis of the housing.The water diverter has a water diverter drive designed to rotate a water diverter disc, rotatably mounted in the heating pump housing, to open or close selected of the multiple fluid outlets. The water diverter disc can be rotated clockwise or counterclockwise into different positions by means of the water diverter drive. Furthermore, a heating pump for a domestic dishwasher is proposed, comprising a heating pump housing, an impeller located within the heating pump housing for conveying wash liquor and / or fresh water from a fluid inlet of the heating pump housing to multiple fluid outlets of the heating pump housing, and a water diverter integrated into the heating pump housing for supplying selected fluid outlets with wash liquor and / or fresh water. The impeller is rotatably mounted in the heating pump housing about a central axis.The water diverter valve has a water diverter actuator designed to rotate a water diverter disc, which is rotatably mounted in the heating pump housing, to open or close selected of the multiple fluid outlets. The water diverter disc can be rotated clockwise or counterclockwise from a reference position to different positions by means of the water diverter actuator. The water diverter disc has several openings arranged in such a way that the multiple fluid outlets are only closed in the reference position.

[0006] Preferably, except in the reference position, in every other position to which the water diverter disc can be adjusted by the water diverter drive, at least one of the several fluid outlets is at least partially opened through one of the several openings in the water diverter disc, so that the flushing solution and / or fresh water can flow out through at least one of the several fluid outlets. Thus, except in the reference position, flushing solution and / or fresh water can always be supplied. This can, for example, result in quieter operation of the heating pump.

[0007] The heating pump is a key component of the hydraulic circuit in a household dishwasher. This hydraulic circuit may include several spray devices, such as rotatable spray arms. The heating pump supplies these spray devices, located primarily in the dishwasher's wash chamber, with treatment fluid, i.e., wash liquid or rinse water and / or fresh water. Simultaneously, the heating pump can introduce heat into the wash liquid and / or fresh water via a heating element. Therefore, a "heating pump" in this context refers to a pump capable of circulating the wash liquid and / or fresh water within the hydraulic circuit, as well as supplying heat to the circulated wash liquid and / or fresh water. Circulation is achieved by means of the 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 type of heating pump can also be described as a compact heating pump.

[0008] 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 that rotates about the central axis during operation. The drive shaft is coupled to the impeller.

[0009] 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 may be rotationally symmetrical about the central axis, while other parts may not be. The central axis can also be referred to as the axis of symmetry or the axis of rotation. 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.

[0010] The fluid inlet can be fluidically connected to the pump sump of the household dishwasher. This allows the heating pump to draw dishwashing liquid and / or fresh water from the pump sump. The fluid inlet is typically located on the lower part of the housing. It can be rotationally symmetrical about the central axis. In other words, the fluid inlet can be positioned centrally on the heating pump housing. The fluid inlet can be at least partially tubular or hollow cylindrical. It extends along the central axis, meaning it runs parallel to it. The fluid inlet is typically located on the underside of the heating pump housing, while the fluid outlets are located on the top.

[0011] 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 arranged 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. The fluid outlets are, in particular, part of the water diverter integrated into the heating pump. The water diverter comprises a water diverter disc rotatably mounted in the heating pump housing. The water diverter disc is, in particular, annular, preferably circular.The water diverter disc has several perforations or openings designed for the flow of flushing fluid and / or fresh water. When the respective opening is positioned by rotating the water diverter disc (upstream of the heating pump during operation) in front of the respective fluid outlet, partially or completely overlapping its inlet cross-sectional area, and thus its inlet cross-sectional area is partially or completely accessible from the supply chamber of the heating pump housing located upstream of the water diverter disc (i.e., open), the flushing 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.Thus, it is possible to selectively supply individual spray units with cleaning solution and / or fresh water using the water diverter, while simultaneously deactivating or closing other spray units. If necessary, all spray units can also be supplied with cleaning solution and / or fresh water simultaneously. If necessary, all fluid outlets assigned to the spray units and located downstream of the water diverter can also be closed by means of the water diverter disc. The water diverter disc is located inside the heating pump housing. Specifically, the water diverter disc is positioned between the lower and upper housing sections. The water diverter disc can be floating. The water diverter disc can be driven by the water diverter actuator, in particular rotated about its central axis.The water diverter drive can have a drive ring coupled to the water diverter disc and a worm shaft for driving the drive ring. The water diverter drive includes a drive motor. The drive motor can preferably be a BLDC (brushless DC) motor or a permanent magnet synchronous motor that is electronically commutated. It can, in particular, be designed as a wet rotor. The water diverter drive can, in particular, be configured to mechanically lock in the reference position. As an alternative to mechanical locking, the reference position can also be determined by a switching contact or a switch which, for example, generates a switching signal when it comes into contact with a stop of the water diverter drive, for example, to switch off the water diverter drive.

[0012] The water diverter is preferably integrated into the heating pump housing, meaning that the water diverter is not a separate assembly from the heating pump, but rather that the water diverter is arranged within the heating pump housing and / or is at least partially formed by the heating pump housing. For example, the water diverter disc is arranged 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.

[0013] The fluid outlets can preferably be selected using the water diverter, which in this case means, in particular, 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 performed, for example, depending on the wash program currently being run in the household dishwasher. The water diverter can be initialized from the reference position. For this purpose, a reference run with reduced motor current can be performed, for example, to avoid placing excessive mechanical stress on the water diverter drive. The reference position can be assigned to the water diverter disc.

[0014] The present heating pump provides a novel hydraulic system for a household dishwasher, in which the heating function for heating the wash water and / or the fresh water, as well as a water distributor in the form of a diverter valve, are integrated in a space-optimized manner. The described heating pump reduces system costs in terms of material and installation costs while simultaneously increasing the performance of the hydraulic system.

[0015] The heating pump enables short changeover times between different fluid outlets because the flow of flushing fluid and / or fresh water through the water diverter disc is blocked only in the reference position. In all other positions to which the water diverter disc can be adjusted by the water diverter actuator, at least a small flow of flushing fluid and / or fresh water through the water diverter disc or through at least one of its openings is possible. This allows the heating pump to deliver flushing fluid and / or fresh water in any position of the water diverter disc except the reference position, with only the flow rate varying depending on the disc's position.Therefore, the heating pump does not build up any static back pressure and / or its speed does not need to be varied during operation to avoid such back pressure. Overall, this reduces hydraulic losses in the heating pump. This also leads to an improvement in the system efficiency of the heating pump, particularly its hydraulic efficiency.

[0016] Faster changeover times between different fluid outlets can also reduce the program duration of household dishwasher programs. The integrated heating pump also enables energy and water savings. If, for example, chemicals need to be circulated through the heating pump for a specific dishwasher program, the consumption of such chemicals can also be reduced.

[0017] According to one embodiment, the water diverter disc is rotatable from a reference position in a clockwise or counterclockwise direction to the different positions by means of the water diverter drive, wherein the water diverter disc has several openings which are arranged on and / or in the water diverter disc in such a way that the multiple fluid outlets, i.e. all fluid outlets downstream of the water diverter disc, are blocked exclusively in the reference position.

[0018] According to a further embodiment, the multiple openings are arranged such that the several fluid outlets can be released individually and sequentially, i.e., consecutively, in a sequence of different positions. Some of the positions can therefore be approached in such a way that the fluid outlets can be released, in particular, one after the other and individually, through one of the openings. The fluid outlets are preferably positioned next to each other. The water diverter disc thus does not have to pass through any positions—so-called multi-positions—in which several fluid outlets are opened simultaneously.By arranging the device in this way, it is possible to design a complete rinsing program sequence by rotating the water diverter disc clockwise or counterclockwise, ensuring that no positions are passed through in which several fluid outlets are open simultaneously, or that no position is passed through in which all fluid outlets are closed.

[0019] This can reduce the water and electricity consumption of the heating pump.

[0020] According to another embodiment, the number of openings is equal to or different from the number of fluid outlets.

[0021] For example, if three fluid outlets are provided, the water diverter disc may preferably also have three openings. In other cases, if, for example, three fluid outlets are provided, the water diverter disc may preferably also have two or four openings. If, for example, four fluid outlets are provided, the water diverter disc may preferably also have four openings. In other cases, if, for example, four fluid outlets are provided, the water diverter disc may preferably also have two, three, five, or six openings. By selecting the number of openings in the water diverter disc depending on the fluid outlets, the opening and / or closing dynamics achieved by adjusting the water diverter disc at the fluid outlets can be manipulated.For example, by choosing the number of openings, it is possible to manipulate how often a particular fluid outlet is released through one of the openings or closed by the water diverter disc when the water diverter disc is adjusted or rotated around an axis of rotation in the form of the central axis of the heating pump housing.

[0022] According to a further embodiment, the water diverter disc is ring-shaped, in particular circular, and the openings of the water diverter disc are rotationally asymmetric to the central axis in an annular area of ​​the water diverter disc.

[0023] The term "rotationally asymmetric" refers in this context specifically to the positioning of the openings in the annular area of ​​the water diverter disk, and describes the fact that the openings are preferably not distributed symmetrically around the central axis or the axis of rotation of the water diverter disk, but rather can be spaced apart from one another in the annular area of ​​the water diverter disk at different partial circular angles, viewed in a circumferential direction around the water diverter disk. The term "annular" describes that the water diverter disk has the shape of a ring. The water diverter disk is circular or approximately circular (with respect to its outer contour) and has a central opening, in particular a central opening or a central opening, in particular a circular opening, extending centrally around the central axis.If the central opening is circular, the water diverter disc thus has the spatial geometric shape of a flat circular annular disc. The surface area of ​​the water diverter disc between the circumferentially distributed openings for the passage of flushing fluid serves to cover the upstream fluid outlets, for which a blockage or closure is provided.

[0024] Closure is demanded.

[0025] According to another embodiment, the openings are either circular or have an elongated hole geometry, the elongated hole geometry serving to release several of the fluid outlets simultaneously if required.

[0026] To allow for as many combinations of open and closed fluid outlets as possible, the water diverter disc preferably has several openings or holes, possibly with different geometries and dimensions. Circular or slightly oval openings, for example, can be used to open only individual fluid outlets when the water diverter disc is in a specific position. Elongated openings, on the other hand, can be used to open several fluid outlets simultaneously, thus enabling, for example, the simultaneous activation of multiple spray devices in a household dishwasher that are assigned to these open fluid outlets, as required in a particular wash program.The multiple openings in the annular area of ​​the water diverter disc are preferably arranged, viewed in a circumferential direction of the water diverter disc, offset by different partial circular angles and spaced apart from one another. This makes it possible to cycle through a sequence of fluid outlets that are opened and then closed again when the water diverter disc is moved around its central axis. This allows for a high degree of design freedom in selecting combinations of opened and closed fluid outlets.

[0027] According to another embodiment, the openings each have an elongated hole-shaped geometry with a longitudinal extent along a circumferential direction of the water diverter disk, wherein the openings differ in their respective longitudinal extent along the circumferential direction.

[0028] The length of the openings can be adjusted to influence the opening and closing behavior during adjustment of the water diverter disc. For example, a particularly long slot can open several fluid outlets simultaneously, whereas a relatively shorter slot or a circular or oval opening can only open a single fluid outlet when the water diverter disc is moved to a corresponding position.

[0029] According to a further embodiment, in every position of the water diverter disc that deviates from the reference position, at least a minimum volume flow of flushing liquid and / or fresh water can flow through at least one of the several fluid outlets.

[0030] In a favorable manner, after a further advantageous development, at least approximately the same volume flow of flushing liquid and / or fresh water flows through at least one of the several fluid outlets in all positions of the water diverter disc that differ from its reference position.

[0031] Preferably, this can be ensured by ensuring that, when the water diverter disc is rotated circumferentially from one circumferential position different from the reference position to the next circumferential position different from the reference position, to the extent that a fluid outlet is continuously or gradually closed by a closed area of ​​the water diverter disc between the openings or holes during its rotation from one circumferential position to the next, another fluid outlet, in particular the fluid outlet closest to the water diverter disc in the circumferential direction of rotation, is opened at least approximately to the same extent by an opening in the water diverter disc that is continuously or gradually brought more and more into alignment with it.This reduces or eliminates pressure surges in the treatment fluid pumped by the rotating impeller and / or torque fluctuations (of the rotating impeller). This, in turn, reduces stress on seals and / or other components of the heating pump and / or the hydraulic circuit of the household dishwasher. Furthermore, vibrations of the heating pump and the associated noise are minimized. The heating element of the pump can also be supplied with more evenly distributed wash water and / or fresh water, resulting in more uniform heat transfer from the heating element to the pumped wash water and / or water.

[0032] According to a further embodiment, one of the multiple fluid outlets is arranged circumferentially offset from grouped fluid outlets. The grouped fluid outlets are arranged within a first partial circular angle of the pump housing, the partial circular angle preferably being less than 90°.

[0033] Particularly preferably, several of the fluid outlets are grouped together and arranged diametrically offset from one of the multiple fluid outlets by a partial circular angle. Preferably, the grouped fluid outlets are arranged at an outer edge of the heating pump housing. More preferably, the grouped fluid outlets are arranged within a partial circular angle of less than 90° and are offset relative to one of the multiple fluid outlets when viewed in the circumferential direction of the water diverter disc. This geometric arrangement of the fluid outlets preferably determines a corresponding placement of the openings in the water diverter disc.

[0034] According to a further embodiment, a first fluid outlet is offset from a second fluid outlet by a second partial circle angle of the pump housing. The first fluid outlet is further offset from a third fluid outlet by a third partial circle angle of the pump housing, the second partial circle angle preferably being smaller than the third partial circle angle. The first fluid outlet, which is particularly arranged individually and spaced apart from the grouped fluid outlets, is therefore preferably offset from the grouped fluid outlets such that a partial circle angle to a first outer fluid outlet of the grouped fluid outlets is larger than a partial circle angle to a second outer fluid outlet of the grouped fluid outlets.The first fluid outlet is therefore preferably not located directly on an angle bisector of the partial circle angle defined by the grouped fluid outlets, but outside such an angle bisector.

[0035] According to another embodiment, the fluid outlets each have a circular, elliptical or oval cross-section.

[0036] By selecting a cross-sectional geometry for the fluid outlets, it is possible to influence the release and closing behavior of the fluid outlets that can be generated by the water diverter disc.

[0037] According to a further embodiment, one of the multiple fluid outlets has a different cross-section than the others. For example, it is possible to design one or more of the fluid outlets with an oval or elliptical cross-section in order to allow, for instance, a reduced flow rate through the oval fluid outlet in a transition zone between two fluid outlets, thus counteracting a static pressure increase in the heating pump. According to a further embodiment, the fluid outlets are each oriented along the central axis. The fluid outlets are preferably oriented vertically when the heating pump is installed in a household dishwasher.Such an orientation of the fluid outlets thus enables a vertical alignment of the heating pump in the household dishwasher and a structurally simple connection of the spray device supply lines to the fluid outlets, since, for example, angled connections or similar can be dispensed with.

[0038] According to another embodiment, the water diverter drive has a drive ring coupled to the water diverter disc and a worm shaft for driving the drive ring.

[0039] The drive ring and the worm shaft preferably engage positively to drive the water diverter disc. The drive ring and the worm shaft preferably lock mechanically in the reference position. A positive engagement is achieved by the interlocking or overlapping of two connecting parts, in this case the drive ring and the worm shaft. The drive ring is annular and preferably has an annular toothed section with a plurality of external teeth. The drive ring is thus toothed. The worm shaft engages these teeth of the drive ring with a helical or spiral worm gear to drive the drive ring. The drive ring is, in turn, positively connected to the water diverter disc.

[0040] Furthermore, a household dishwasher with such a heating pump is proposed.

[0041] The household dishwasher preferably has a cuboid-shaped wash tub. The wash tub can be closed by means of a hinged door. The wash tub may contain several compartments, such as a lower rack, an upper rack, and a cutlery drawer. These compartments hold items that can be sprayed with wash water and / or fresh water by means of the aforementioned hydraulic circuit. The heating pump is part of this hydraulic circuit. The wash tub also contains several spray devices, for example, in the form of rotating spray arms. These spray devices are also part of the hydraulic circuit. The heating pump supplies the spray devices with wash water and / or fresh water to wet the items being washed.Selective or targeted control of individual or all spray devices is achieved using the water diverter integrated into the heating pump. A spray device in the form of an intensive spray zone can also be provided.

[0042] According to one embodiment, the household dishwasher has several spray units. The heating pump is arranged such that one of the fluid outlets, viewed along a y-direction or along a vertical line (against the direction of gravity), is located directly below a supply line associated with the spray unit, with this one fluid outlet being aligned with the supply line. In this case, a vertical orientation of the heating pump or its drive shaft is therefore preferably chosen. Furthermore, one of the fluid outlets of the heating pump is arranged such that it is positioned directly below the supply line of the lower spray unit for supplying the lower or bottom-level spray unit. This is achieved by providing this one fluid outlet, in particular, diametrically opposed to the other fluid outlets on the heating pump housing.

[0043] Furthermore, a control unit for operating a heating pump for a household dishwasher with multiple spray heads is proposed. The heating pump comprises a pump housing, an impeller located within the pump housing for pumping wash liquor and / or fresh water from a fluid inlet of the pump housing to several fluid outlets of the pump housing, and a water diverter integrated into the pump housing for supplying selected fluid outlets with wash liquor and / or fresh water. The impeller is rotatably mounted in the pump housing about a central axis. The water diverter has a drive mechanism designed to rotate a water diverter disc, rotatably mounted within the pump housing, to open or close selected of the multiple fluid outlets. The water diverter disc has several openings.

[0044] The control unit is designed to actuate the water diverter drive, at least to rotate the water diverter disc from a reference position clockwise or counterclockwise to at least one further position in which at least one of the multiple fluid outlets is at least partially enabled, thus selectively switching the spray devices on or off. The multiple fluid outlets are blocked, i.e., locked, exclusively in the reference position.

[0045] According to one embodiment, the control unit is configured to control the water diverter drive in order to rotate the water diverter disc clockwise or counterclockwise, in particular in a sequential sequence, into several of the further positions in which only one of the several fluid outlets is released at any given time.

[0046] The sequential activation of several further positions, in which only one of the fluid outlets is enabled through one of the openings in the water diverter disc, can be advantageous, for example, during a water and / or energy-saving program (Eco program) of a household dishwasher. In such an Eco program, one of the main objectives is to save on wash water and / or fresh water. Energy savings are also desired. To reduce wash water and / or fresh water consumption in particular, fast switching times of the heating pump for controlling the individual spray devices are required. Selecting which spray device is activated is achieved by adjusting the water diverter disc using the...

[0047] Water diverter drive. To control the various spray devices individually without having to open several spray devices simultaneously, it is preferred that at least one group of the multiple fluid outlets be located next to each other and be individually opened or closed by the water diverter disc. A wide spacing of these fluid outlets would increase the consumption of rinsing solution and / or fresh water, particularly by passing through multi-positions in which several fluid outlets are open simultaneously. Furthermore, increased noise emissions from the heating pump would be expected. The grouped fluid outlets allow for short changeover times. Moreover, the water diverter disc does not need to pass through multi-positions in which, for example, several fluid outlets are at least partially open simultaneously.

[0048] By positioning the fluid outlets on the heating pump housing in this way, for example, a change of spray levels within the household dishwasher can be ensured during an Eco program without having to cycle through multi-positions. Avoiding multi-positions has the advantage that the heating pump remains in a continuous cycle, as the demand for wash water and / or fresh water when switching to individual fluid outlets is significantly reduced compared to multi-positions. Thus, the selection and placement of the fluid outlets, as well as the selection and placement of the openings in the water diverter disc, allows for optimal water consumption and, consequently, energy consumption.

[0049] In particular, the openings in the water diverter disc intended for the passage of rinsing liquor and / or fresh water, as well as the fluid outlets, can be arranged, assigned to one another and designed in such a way that, when the water diverter disc is rotated in one and the same direction of rotation, all fluid outlets that are fluidically connected to the spray devices in the rinsing chamber of the rinsing tank are opened and closed one after the other, i.e. sequentially, without passing through multiple positions in which two or more fluid outlets are open simultaneously.Thus, as the water diverter drive causes the water diverter disc to rotate in the same direction, all individual positions of the water diverter are successively traversed one after the other, in which only a single fluid outlet is open through a hole in the water diverter disc that is aligned with it, and all other fluid outlets are closed by the cover surface of the water diverter disc.

[0050] Advantageously, the fluid outlet preceding the next fluid outlet in the direction of rotation is closed to the same extent as the next fluid outlet opens. This means that the fluid outlet next in the direction of rotation is preferably opened by a cross-sectional area that essentially corresponds to the closing cross-sectional area of ​​the fluid outlet preceding it. This allows at least a minimal volume flow, and in particular at least approximately the same volume flow, of flushing fluid and / or fresh water to be discharged from the heating pump as the pump passes through all successive or consecutive positions of the water diverter in the circumferential direction.This largely prevents pressure fluctuations in the flushing solution and / or the fresh water, which is pumped by the rotating impeller during pump operation, and thus any associated vibrations of the pump housing and / or other components of the heating pump, which could potentially lead to undesirable stress on the pump housing and / or other heating pump components and / or disruptive noise. Furthermore, the minimum, and in particular the largely constant, flow rate of flushing solution and / or fresh water, which is ensured during all individual positions and allows the heating pump to exit via the water diverter into the respective fluid outlet, ensures that the heating element of the heating pump is uniformly supplied with flushing solution and / or the fresh water, allowing heat to be transferred evenly to the flushing solution and / or the fresh water. This can protect the heating element.

[0051] In particular, it is possible to switch very quickly back and forth between any two individual positions of the water diverter, especially those adjacent in the circumferential direction, by reversing the direction of rotation of the water diverter disc, without passing through a multi-position. To traverse all individual positions of the water diverter, it is sufficient if the water diverter disc is rotated by the water diverter drive by only a partial circle angle of a 360° full rotation. In particular, a rotation of the water diverter disc of less than a 90° partial circle angle is sufficient. Thus, to switch between any two individual positions adjacent in the direction of rotation, a fraction of this partial circle angle is sufficient, preferably less than 35°, preferably between 20° and 32°. This allows extremely fast changes from a

[0052] Single position to the next single position and vice versa (in the opposite direction of rotation).

[0053] Advantageously, after and / or before the sequence of individual positions, various multi-positions of the water diverter can be approached separately from these in the direction of rotation and / or counter-rotation of the water diverter disc. Preferably, a group of different multi-positions of the water diverter can be consecutively achieved by rotating the water diverter disc by means of the water diverter drive.

[0054] Other possible implementations of the heating pumps of the household dishwasher and / or the control unit 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 heating pump, the household dishwasher, and / or the control unit.

[0055] Further advantageous embodiments and aspects of the heating pump, the household dishwasher, and / or the control unit are the subject of the dependent claims and the exemplary embodiments of the heating pump, the household dishwasher, and / or the control unit described below. The heating pump, the household dishwasher, and / or the control unit are further explained below with reference to preferred embodiments and the accompanying figures.

[0056] Fig. 1 shows a schematic perspective view of an embodiment of a household dishwasher;

[0057] Fig. 2 shows a schematic sectional view of the household dishwasher according to Fig. 1;

[0058] Fig. 3 shows a schematic sectional view of an embodiment of a heating pump for the household dishwasher according to Fig. 1; Fig. 4 shows a schematic top view of the heating pump according to Fig. 3;

[0059] Fig. 5 shows a schematic bottom view of an embodiment of a

[0060] Water diverter for the heating pump according to Fig. 3; Fig. 6 shows a schematic top view of an embodiment of a housing upper part for the heating pump according to Fig. 3;

[0061] Fig. 7 shows a schematic view of possible approachable positions of the water diverter according to Fig. 5; and

[0062] Fig. 8 shows schematically abstracted views of the water diverter according to Fig. 5 in five exemplary positions according to Fig. 7. In the figures, identical or functionally equivalent elements have been provided with the same reference numerals unless otherwise indicated.

[0063] 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.

[0064] 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 located at one of its lower ends. 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 base 7, a top 8 opposite the base 7, a rear wall 9 opposite the closed door 3, and two opposing side walls 10 and 11. The base 7, the top 8, the rear wall 9, and the side walls 10 and 11 can, for example, be made of stainless steel. Alternatively, the base 7 can, for example, be made of a plastic material.

[0065] 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 the dishware holder 12 can be a lower dishware holder or a lower basket, the dishware holder 13 an upper dishware holder or an upper basket, and the 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,

[0066] 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. Fig. 2 shows a highly schematic sectional view of the household dishwasher 1. In addition to 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 Fig. 2, a direction of gravity g is oriented from top to bottom.

[0067] Household dishwasher 1 is assigned a coordinate system with a width direction or x-direction x, a height direction or y-direction y, and a depth direction or z-direction z. The directions x, y, z are oriented perpendicular to each other.

[0068] 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.

[0069] 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. Rinsing liquor and / or fresh water F can also 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. A drain 22 opens from the pump sump 16, in particular from the raw area 20. A drain pump 23 is connected to the drain 22. With the help of the drain pump 23, dirty rinse water and / or fresh water F can be pumped out via a wastewater line 24.The wastewater pipe 24 can be connected to a stationary drain of a building.

[0070] 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 attached to the pump sump 16. The heating pump 26 is a compact heating pump and can therefore also be referred to as such.

[0071] 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.

[0072] The heating pump 26 is in fluid connection with 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.

[0073] 26. With the aid of the water diverter 27, it is possible to selectively distribute the rinse solution and / or the fresh water F supplied by the heating pump 26 to different spray devices 28, 29, 30 provided in the rinse tank 2. The water diverter 27 allows the spray devices 28, 29, 30 to be selectively supplied with rinse solution and / or fresh water F or not.

[0074] Spray devices 28 and 29 can be spray arms, whereas spray device 30 can be a roof-mounted rotary nozzle or a roof shower. Additional switchable spray devices are also possible.

[0075] Intensive spray zones or one or more screen cleaning nozzles (not shown) may be provided. For example, the spray device 28, in particular a rotatable lower spray arm, is rotatably mounted below the dishware intake 12 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 which spray the wash liquor and / or the fresh water F upwards into the dishware intake 12 and downwards towards the screen system 17 in the orientation shown in Fig. 2.

[0076] 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.

[0077] 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.

[0078] Spray device 29 is associated with a supply line 35, which fluidically connects the spray device 29 to the heating pump 26. The heating pump 26 can supply the spray device 29 with rinsing solution and / or fresh water F via the supply line 35. Spray device 30 is associated with a supply line 36, which fluidly 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. 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 part of the supply lines 34, 35, 36 can be passed through the sieve system 17.

[0079] 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.

[0080] 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.

[0081] The control unit 38 can be arranged in or on the door 3. Preferably, the control unit 38 is located on an upper edge of the door 3 (not shown). However, 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 attached to the door 3. The heating pump 26 can be controlled by means of 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 the speed of the heating pump 26 and / or the motor current of the heating pump 26. Furthermore, the control unit

[0082] 38 also control the water diverter 27 to selectively switch on or off the spray devices 28, 29, 30.

[0083] The washing container 2 contains items 39 to be cleaned. These items 39 can include, for example, glasses, plates, pots, bowls, cutlery, or the like.

[0084] In particular, the items to be washed 39 are held in the item holders 12, 13, 14 (not shown in Fig. 2). The items to be washed can be sprayed with the aid of the spray devices 28, 29, 30.

[0085] 39 is supplied with rinsing solution and / or fresh water F. Fig. 3 shows a schematic sectional view of an advantageous embodiment of a heating pump 26 as previously mentioned. Fig. 4 shows a top view of the heating pump 26. Reference is made hereafter to Figs. 3 and 4 simultaneously.

[0086] 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.

[0087] 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

[0088] 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 latched or snapped together. However, a bayonet connection and / or a screw connection can also be provided. 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.

[0089] The heating pump housing 41 is essentially rotationally symmetrical about the central axis 40.

[0090] The lower housing part 42 accommodates an impeller 45, which is arranged downstream of the fluid inlet 44. The impeller 45 is not shown in section in Fig. 3.

[0091] The impeller 45 can be a vane or be described as such. The impeller 45 is driven by a drive motor 46. The drive motor 46 is an electric motor. The impeller 45 can also be referred to as an impeller. The drive motor 46 includes 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 operating. In addition to the impeller 45, a rotor 48 of the drive motor 46 is non-rotatably connected to the drive shaft 47.

[0092] 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 closed downwards, i.e., in the direction of the impeller 45, by a closure 51. The drive shaft 47 passes through the closure 51 and can be supported by it.

[0093] The drive motor 46 can be, in particular, a BLDC (brushless DC) motor or a permanent magnet synchronous motor (PMSM), especially a wet-rotor motor, with a vertical orientation. The drive motor 46, with the drive shaft 47 oriented vertically, is integrated and / or embedded in the upper housing part 43. The drive motor 46 drives the impeller 45, which draws in the cleaning solution and / or the fresh water F from below, deflects it by 90°, and accelerates it outwards in the radial direction R. In addition to the first receiving section 49, the upper housing part 43 includes a second receiving section 52. The second receiving section 52 is also cup-shaped. 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 at the bottom. The first receiving section 49 is arranged within the second receiving section 52.The second recording section 52 therefore has a larger diameter than the first recording section 49.

[0094] An annular recording chamber 53 is provided between the first recording section 49 and the second recording section 52. A stator is located in the recording chamber 53.

[0095] The stator 54 is arranged on the drive motor 46. The stator 54 can be bonded to the first receiving section 49 and / or the second receiving section 52.

[0096] The lower housing part 42 has a plate-shaped base section 55 and a tubular or hollow cylindrical wall section 56. The base section

[0097] Fluid inlet 44 is provided at 55. Both the bottom section 55 and the wall section 56 are rotationally symmetrical about the central axis 40. The bottom 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 surrounds the central axis 40, adjoins the wall section 56. The upper housing part 43 is connected to the lower housing part 42 via the connecting section 58.

[0098] 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, correspondingly four fluid outlets 59, 60, 61, 62 are also provided. The fluid outlets 59, 60, 61, 62 are arranged unevenly around the central axis 40. The fluid outlets 59, 60, 61, 62 are oriented vertically upwards and thus along the central axis 40.

[0099] 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 outlet or a "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 different.

[0100] 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.

[0101] 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 first partial circular angle α of the pump housing 41. The first partial circular angle α is less than 90°.

[0102] 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 and 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.

[0103] 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. The heating element 67 is associated with a plane of symmetry 68, with respect to which the heating element 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.

[0104] 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. The heating device 67 is placed on spacer feet 69, 70, of which only two are shown in Fig. 3. These are preferably provided on the lower part of the housing 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 of, for example, metal, plastic, or ceramic. If the spacer feet 69, 70 are made of metal or ceramic, they can be recessed in pockets molded onto the lower housing part 42. The spacer feet 69, 70 can also be overmolded with the same material as the lower housing part 42. The spacer feet 69, 70 prevent the heating element 67 from resting directly on the base section 55, thus allowing complete flow of cleaning solution and / or fresh water F around the heating element 67.

[0105] 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.

[0106] According to Fig. 3, the heating pump 26 is arranged such that the fluid outlet 59, viewed along the y-direction y, is located directly below the supply line 34 associated with the spray device 28. The fluid outlet 59 is aligned with the supply line 34. The fluid outlet 59 is fluid-conducting and watertight to the outside when connected to the supply line 34. For this purpose, a sealing device (not shown) can be provided, for example, between the fluid outlet 59 and the supply line 34 and / or between the heating pump housing 41 and the pump sump 16 or another housing component. The spray device 28 can be rotatably mounted on the supply line 34 about the axis of rotation 31. In this case, the

[0107] Supply line 34 forms part of the spray device 28, for example in the form of an under-basket spray arm. The fluid outlets 59, 60, 61, 62 are thus arranged such that the fluid outlet 59 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 provided by the supply line 34.

[0108] 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., from the fluid inlet 44 to 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. The water diverter disc 72 is rotationally asymmetrical 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 is guided through the opening 73. The opening 73 is preferably circular.

[0109] Water diverter disc 72 is ring-shaped.

[0110] 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.

[0111] The openings 74, 75, 76 can be circular. The openings 74, 75, 76 can also be elongated. The elongated geometry allows for the simultaneous opening of several of the fluid outlets 59, 60, 61, 62. The number of openings 74, 75, 76 can correspond to the number of fluid outlets 59, 60, 61, 62. However, this is not mandatory. The fluid outlets 59, 60, 61, 62 can be combined in any configuration using the water diverter disc 72. In this example, openings 74 and 75 are each designed as a shorter elongated hole compared to opening 76. The elongated hole of the opening 76 is preferably, viewed at a partial circle angle <51°, approximately twice as long as the elongated holes of the openings 74, 75, viewed at a partial circle angle <52° or at a partial circle angle <53°. The elongated hole of the opening 74 is preferably longer than the elongated hole of the opening 75. Preferably, <51° > <52° > <53°.The respective partial circle angle <51 , <52 , <53 preferably specifies a longitudinal extent along a circumferential direction U of the respective elongated hole.

[0112] 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 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. It can in particular be designed as a wet rotor.

[0113] 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 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.

[0114] 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.

[0115] The water diverter disc 72 is floatingly mounted in the aforementioned drive ring 79 and a cylindrical inner wall of the feed chamber 66, 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 rinsing solution and / or the fresh water F, thus creating integrated openings in the housing upper part 43 for the fluid outlets.

[0116] 59, 60, 61, 62 as tightly as possible, without requiring an additional elastomer seal. Fig. 6 shows the housing upper part 43 in a further embodiment in an isolated top view. The housing upper part has the several fluid outlets 59,

[0117] 60, 61, 62. The fluid outlets 59, 60, 61, 62 are, viewed with additional reference to Fig. 3, oriented vertically upwards and thus along or parallel to the central axis 40. As can be seen from Fig. 6, the fluid outlets 59, 60, 61 each preferably have an at least approximately circular cross-section. The

[0118] In the example shown, fluid outlet 62 has an elliptical or oval cross-section. Fluid outlets 60, 61, 62 are arranged within the first partial circle angle α of the heating pump housing 41 or the upper housing section 43 of the pump housing 41. The first partial circle angle α is less than 90°. Fluid outlet 59 is offset from fluid outlet 60 by a second partial circle angle β of the upper housing section 43 of the pump housing 41. Fluid outlet 59 is offset from fluid outlet 62 by a third partial circle angle γ of the upper housing section 43 of the pump housing 41. The second partial circle angle β is preferably smaller than the third partial circle angle γ. The partial circle angles β and γ can also be assigned to the heating pump housing 41.

[0119] With further reference to Fig. 3, the lower housing part 42 and the upper housing part 43 are positively connected to each other (not shown). For this purpose, for example, locking hooks, snap hooks, or the like can be provided on the upper housing part 43, which enable 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. The locking hooks can, for example, be arranged around the central axis 40 to align the upper housing part 43 relative to the lower housing part 42, and can be inserted, for example, into locking grooves in the lower housing part 42 (not shown). The snap hook(s) preferably serve to positively connect or close the upper housing part 43.The snap hook can, for example, be provided on a mounting tab (not shown) of the upper housing part 43. Fig. 7 shows a schematic view of possible approachable positions of the water diverter 27, in particular the water diverter disc 72. The numbering of the various positions PO to P10 follows here, in the exemplary embodiment, when the water diverter disc 72 is rotated clockwise. Fig. 8 shows, for a selection of the positions shown in Fig. 7, a highly abstracted schematic representation of the position of the water diverter 27 or the water diverter disc 72 with respect to the fluid outlets 59, 60, 61, 62. The selection is limited to the individual positions of the water diverter 27, i.e., to the consecutive travel positions of the water diverter disc 72 in the direction of rotation, in which only a single fluid outlet is selectively or partially controlled.It is singularly supplied with rinsing solution and / or fresh water, while all other fluid outlets are covered and thus closed from below by the cover surface of the water diverter disc.

[0120] Here, PO denotes a reference position. In the reference position PO, the water diverter drive 77 can be mechanically blocked by a stop (not shown) for its worm shaft 80. In particular, the worm shaft can bear against a first stop surface of the drive ring 79. From the reference position PO, the water diverter disc 72 can be rotated clockwise or counterclockwise. In this embodiment, the water diverter disc 72 is rotated clockwise.

[0121] In reference position PO, all fluid outlets 59, 60, 61, 62 are closed. Therefore, in reference position PO of the water diverter disc 72, no flushing solution and / or fresh water F can flow out of the heating pump 26 via fluid outlets 59, 60, 61, 62.

[0122] For example, the water diverter disc 72 can be rotated from the reference position PO to a position P1. In position P1, for example, a lower basket spray arm in the form of the spray device 28 and an additional feature or function, for example in the form of an intensive spray zone, are supplied with rinsing solution and / or fresh water F. For this purpose, the opening 75 of the water diverter disc 72 with the fluid outlet 59 and a portion of the longer elongated opening 76 of the water diverter disc 72 with the fluid outlet 60 are aligned. When the water diverter disc 72 is moved (here, in the exemplary embodiment, clockwise) to position P1, in which the water diverter disc 72 releases the fluid outlet 59 by means of the opening 75, rinsing solution and / or fresh water F can flow from the clean area 21 of the pump sump 16 (see Fig. 2) via the drain or...The fluid is drawn into the connecting channel 25 by the heating pump 26 and accelerated radially R towards the feed chamber 66 (see Fig. 3), in order to then flow, for example, via the fluid outlet 59 and the fluid-conducting supply line 34 connected to it, into the spray device 28. At the same time, the water diverter disc 72, by means of its opening 76, releases the fluid outlet or feature outlet 60, so that the rinsing solution and / or the fresh water pumped by the rotating impeller 45 can flow to a dispensing unit with an additional function. The fluid outlets 61 and 62 are closed or blocked during this process.

[0123] In a subsequent position P2 in the direction of rotation, for example, a roof-mounted rotary nozzle or roof-mounted shower in the form of the spray device 30 and the previously mentioned additional function are supplied with rinsing solution and / or fresh water F. For this purpose, the water diverter disc 72, by means of its elongated opening 76, exposes both the fluid outlet 61 and the fluid outlet or feature outlet 60, while the fluid outlets 62 and 59 are closed.

[0124] In a subsequent position P3 in the direction of rotation, for example, an upper basket spray arm in the form of the spray device 29, a roof-mounted sprayer or roof shower in the form of the spray device 30, and a dispensing unit with an additional function, such as a special spray zone, are supplied with rinsing solution and / or fresh water F. For this purpose, the water diverter disc 72, by means of its elongated opening 76, opens both the fluid outlet 62 (at least partially) and the fluid outlets 61 and 60, while the fluid outlet 59 remains closed.

[0125] In a subsequent position P4 in the direction of rotation, for example, a lower basket spray arm in the form of spray device 28 and an upper basket spray arm in the form of spray device 29 are supplied with rinse water and / or fresh water F. For this purpose, the water diverter disc 72 opens fluid outlet 59 via its opening 74 and fluid outlet 62 via its longer opening 76, while fluid outlets 60 and 61 are now closed. In a subsequent position P5 in the direction of rotation, for example, only the dispensing unit with additional function is supplied with rinse water and / or fresh water F. For this purpose, the water diverter disc 72 opens fluid outlet 60 via its opening 75, while all other fluid outlets 59, 61, and 62 are closed.

[0126] In a subsequent position P6 in the direction of rotation, only one roof-mounted rotary nozzle or roof-mounted sprayer in the form of the spray device 30 is active. For this purpose, the water diverter disc 72 opens the fluid outlet 61 by means of its opening 75, while all other fluid outlets 59, 60 and 62 are closed.

[0127] In a subsequent position P7 in the direction of rotation, only one upper basket spray arm, in the form of the spray device 29, is supplied with rinsing solution and / or fresh water F. For this purpose, the water diverter disc 72 now opens the fluid outlet 62 by means of its opening 75, while all other fluid outlets 59, 60 and 61 are closed.

[0128] In a subsequent position P8 in the direction of rotation, only one lower basket spray arm in the form of the spray device 28 is active. For this purpose, the water diverter disc 72 now opens the fluid outlet 59 by means of its longer elongated opening 76, while all other fluid outlets 60, 61 and 62, grouped opposite the fluid outlet, are closed.

[0129] Positions P5 to P8 are shown again with a respective position of the water diverter disc 72 in Fig. 8.

[0130] In a subsequent position P9 in the direction of rotation, both the lower basket spray arm in the form of the spray device 28 and the auxiliary function are supplied with rinsing solution and / or fresh water F. For this purpose, the water diverter disc 72 now opens the fluid outlet 59 via its longer elongated opening 76 and the fluid outlet 60 via its shorter opening 74, while all other fluid outlets 61 and 62 are closed.

[0131] In a subsequent position P10 in the direction of rotation, however, rinsing fluid and / or fresh water F are supplied to both a lower basket spray arm in the form of the spray device 28 and a roof-mounted rotary nozzle or roof-mounted shower head as the uppermost spray device 30. For this purpose, the water diverter disc 72 opens the fluid outlet 59 by means of its longer elongated opening 76 and the fluid outlet 61 by means of its shorter opening 74, while all other fluid outlets 60 and 62 are closed.

[0132] If the water diverter disc 72 is rotated further from position P10 in the direction of rotation, the rotational movement of the worm shaft 80 of the water diverter drive 77 is preferably blocked at a second contact surface of the drive ring 79, which is provided at the same circumferential point of the drive ring as the first contact surface.

[0133] The drive ring 79 and the water diverter disc 72 coupled to it have thus reached their reference position PO. From this blockage, the drive ring 79 with the water diverter disc 72 can only be moved counterclockwise to its initial position at the first contact surface of the mechanical stop by passing through positions P10, P9, P8, P7, P6, P5, P4, P3, P2, P1. If no mechanical stop of this type is provided and the reference position PO can be passed through without blocking the drive ring 79, the drive ring 79 with the water diverter disc 72 can preferably be rotated from the reference position PO to position P1 (clockwise) or to position P10 (counterclockwise).

[0134] Although the present invention has been described using exemplary embodiments, it can be modified in many ways.

[0135] Reference symbols used:

[0136] 1 household dishwasher

[0137] 2 wash tubs 3 doors

[0138] 4. Dishwashing area

[0139] 5 swivel axes

[0140] 6 Feed opening

[0141] 7 Floor 8 Ceiling

[0142] 9 Back panel

[0143] 10 side wall

[0144] 11 Side wall

[0145] 12 Dishwashing compartment 13 Dishwashing compartment

[0146] 14 Dishwashing tray

[0147] 15 base carriers

[0148] 16 Pump sump

[0149] 17 Sieve system 18 Surface sieve

[0150] 19 fine sieve

[0151] 20 Raw area

[0152] 21 Cleanroom

[0153] 22 Drain 23 Drain pump

[0154] 24 Wastewater pipe

[0155] 25 Drainage or connection channel

[0156] 26 Heating pump

[0157] 27 Water diverter 28 Spray device

[0158] 29 Spray device

[0159] 30 Spray device

[0160] 31 Rotation axis

[0161] 32 Axis of rotation 33 Axis of rotation

[0162] 34 Supply line

[0163] 35 Supply line

[0164] 36 Supply line

[0165] 5 37 Hydraulic circuit

[0166] 38 Control unit

[0167] 39 items washed

[0168] 40 Center axis

[0169] 41 Heating pump housings

[0170] 42 Lower housing part

[0171] 43 Housing top

[0172] 44 Fluid inlet

[0173] 45 wheel

[0174] 46 Drive motor

[0175] 15 47 Drive shaft

[0176] 48 Rotor

[0177] 49 Recording section

[0178] 50 recording room

[0179] 51 Closure

[0180] 20 52 Recording section

[0181] 53 Recording room

[0182] 54 Stator

[0183] 55 floor section

[0184] 56 Wall section

[0185] 25 57 Rounding

[0186] 58 Connecting section

[0187] 59 Fluid outlet

[0188] 60 Fluid outlet

[0189] 61 Fluid outlet g 30 62 Fluid outlet

[0190] 63 End plate

[0191] Connection section

[0192] 65 wall section

[0193] 66 Feed chamber 67 Heating unit

[0194] 68 Plane of symmetry

[0195] 69 feet of space

[0196] 70 feet

[0197] 71 Arrow

[0198] 72 Water switch disc

[0199] 73 Breakthrough

[0200] 74 Breakthrough

[0201] 75 Breakthrough

[0202] 76 Breakthrough

[0203] 77 Water switch drive

[0204] 78 Drive motor

[0205] 79 Drive ring

[0206] 80 worm shaft

[0207] 81 Drive housing

[0208] A Extraction direction

[0209] AX Axial direction

[0210] E Insertion direction

[0211] F F Rinsing liquid and / or fresh water g Gravity direction

[0212] Q Heat

[0213] PO Reference Position

[0214] P1 Position

[0215] P2 Position

[0216] P3 Position

[0217] P4 Position

[0218] P5 Position

[0219] P6 Position

[0220] P7 Position

[0221] P8 Position

[0222] P9 Position

[0223] P10 Position

[0224] R Radial direction S Flow direction

[0225] U circumferential direction x x-direction y y-direction z z-direction a partial circle angle ß partial circle angle

[0226] Y partial circle angle

[0227] 51 Part circle angle

[0228] 52 Part circle angle

[0229] 53 Part circle angle

Claims

PATENT CLAIMS 1. Heating pump (26) for a household dishwasher (1), comprising a heating pump housing (41), an impeller (45) arranged within the heating pump housing (41) for pumping wash liquor and / or fresh water (F) from a fluid inlet (44) of the heating pump housing (41) to several fluid outlets (59, 60, 61, 62) of the heating pump housing (41), and a water diverter (27) integrated into the heating pump housing (41) for supplying selected fluid outlets (59, 60, 61, 62) with the aid of the water diverter (27). Flushing liquid and / or fresh water (F), wherein the impeller (45) is rotatably mounted in the heating pump housing (41) about a central axis (40) of the heating pump housing (41), wherein the water diverter (27) has a water diverter drive (77) which is configured to rotate a water diverter disk (72) of the water diverter (27) rotatably mounted in the heating pump housing (41). to rotate the water diverter disk (72) to release or block selected of the several fluid outlets (59, 60, 61, 62), and wherein the water diverter disk (72) can be rotated clockwise or counterclockwise into different positions (P1, P2, P3, P4, P5, P6, P7, P8, P9, P10) by means of the water diverter drive (77).

2. Heating pump according to claim 1, characterized in that the The water diverter disk (72) can be rotated from a reference position (PO) clockwise or counterclockwise to the different positions (P1, P2, P3, P4, P5, P6, P7, P8, P9, P10) by means of the water diverter drive (77), wherein the water diverter disk (72) has several openings (74, 75, 76) which are arranged on the water diverter disk (72) such that the several fluid outlets (59, 60, 61, 62) are blocked exclusively in the reference position (PO).

3. Heating pump according to claim 2, characterized in that the multiple openings (74, 75, 76) are arranged such that the multiple Fluid outlets (59, 60, 61, 62) in a sequence of different positions (P5, P6, P7, P8) can each be released individually and sequentially.

4. Heating pump according to claim 2 or 3, characterized in that the water diverter disc (72) is annular in shape, and the openings (74, 75, 76) of the water diverter disk (72) are provided rotationally asymmetrically to the central axis (40) in an annular region of the water diverter disk (72).

5. Heating pump according to claim 4, characterized in that the openings (74, 75, 76) are each circular or have an elongated hole geometry, the elongated hole geometry serving to release several of the fluid outlets (59, 60, 61, 62) simultaneously.

6. Heating pump according to claim 5, characterized in that the openings (74, 75, 76) each have an elongated hole geometry with a longitudinal extent along a circumferential direction (U) of the water diverter disk (72), wherein the openings (74, 75, 76) differ in their respective longitudinal extent along the circumferential direction (U).

7. Heating pump according to one of claims 1-6, characterized in that a fluid outlet (59) of the several fluid outlets (59, 60, 61, 62) is arranged offset in a circumferential direction (U) from grouped fluid outlets (60, 61, 62) of the several fluid outlets (59, 60, 61, 62), and the grouped fluid outlets (60, 61, 62) are arranged within a first partial circular angle (a) of the pump housing (41) are arranged, wherein the first partial circle angle (a) is preferably less than 90°.

8. Heating pump according to claim 7, characterized in that a first fluid outlet (59) is separated from a second fluid outlet (60) by a second The first fluid outlet (59) is arranged offset by a third partial circle angle (β) of the pump housing (41), wherein the first fluid outlet (59) is arranged offset from a third fluid outlet (62) by a third partial circle angle (γ) of the pump housing (41), wherein the second partial circle angle (β) is preferably smaller than the third partial circle angle (y).

9. Heating pump according to claim 2, characterized in that in each position (P1, P2, P3, P4, P5, P6, P7, P8) that deviates from the reference position (PO), P9, P10) of the water diverter disc (72) at least a minimum volume flow of flushing liquid and / or fresh water (F) can flow through at least one of the several fluid outlets (59, 60, 61, 62).

10. Heating pump according to one of claims 1 - 9, characterized in that a The fluid outlet (62) of the multiple fluid outlets (59, 60, 61, 62) has a cross-section different from that of the other multiple fluid outlets (59, 60, 61, 62).

11. Heating pump according to one of claims 1-10, characterized in that the fluid outlets (59, 60, 61, 62) are each oriented along the central axis (40).

12. Household dishwasher (1) with a heating pump (26) according to one of claims 1 - 11.

13. Household dishwasher (1) according to claim 12, characterized in that the household dishwasher (1) has several spray devices (28, 29, 30), and the heating pump (26) is arranged such that one fluid outlet (59) of the several fluid outlets (59, 60, 61, 62) is located, viewed along a y-direction (y), directly below a supply line (34) associated with the spray device (28), wherein the fluid outlet (59) is aligned with the supply line (34).

14. Control unit (38) for operating a heating pump (26) for a domestic Dishwasher (1) with multiple spray devices (28, 29, 30), wherein the heating pump (26) has a heating pump housing (41), an impeller (45) arranged inside the heating pump housing (41) for pumping wash liquor and / or fresh water (F) from a fluid inlet (44) of the The heating pump housing (41) has several fluid outlets (59, 60, 61, 62) of the heating pump housing (41), and a water diverter (27) integrated into the heating pump housing (41) for supplying selected fluid outlets (59, 60, 61, 62) with flushing fluid and / or fresh water (F) by means of the water diverter (27), wherein the impeller (45) is rotated about a central axis (40) of the The water diverter (27) is rotatably mounted in the heating pump housing (41), wherein the water diverter (27) has a water diverter drive (77) which is configured to rotate a water diverter disk (72) rotatably mounted in the heating pump housing (41) to release or block selected of the several fluid outlets (59, 60, 61, 62), wherein the The water diverter disc (72) has several openings (74, 75, 76), wherein the control unit (38) is configured to actuate the water diverter drive (77), at least to rotate the water diverter disc (72) clockwise or counterclockwise into at least one position (P1, P2, P3, P4, P5, P6, P7, P8, P9, P10) in which at least one of the several fluid outlets (59, 60, 61, 62) is at least partially released, in order to selectively switch the spray devices (28, 29, 30) on or off.

15. Control unit according to claim 14, characterized in that the The control unit (38) is configured to control the water diverter drive (77) to rotate the water diverter disc (72) clockwise or counterclockwise, in particular in a sequential sequence, into several of the positions (P5, P6, P7, P8) in which only one of the several fluid outlets (59, 60, 61, 62) is enabled.

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