EP3733040A1 - Water-transporting household device - Google Patents

Abstract

A dishwasher (11) has a lockable treatment chamber (14) for dishes to be treated, at least one water inlet (38) into the treatment chamber (14), a sump (19) at the bottom of the treatment chamber (14) and a sump water outlet (34) from the sump (19), which leads away horizontally in the lateral direction from the sump (19). An impeller pump (36) is provided with a pump inlet (41), an upper pump outlet (43), a pump chamber (45), an impeller (52) arranged in the pump chamber (45) and a pump motor (54) for the impeller (52) ), the pump inlet (41) being connected to the sump water outlet (34). The pump chamber (45) runs around like a ring and surrounds the pump motor (54) at least partially as seen in the axial direction. The upper pump outlet (43) is arranged higher than the impeller (52).

Description

Field of application and state of the art

The invention relates to a water-carrying household appliance with a water treatment room and with a water flow from or to the water treatment room, in particular also away from it. Such a household appliance is particularly advantageously a dishwasher or a washing machine.

From the EP 2 862 494 A1 a water-bearing household appliance is known with a treatment chamber, in the lower area of which a sump is provided in a known manner. An impeller pump is then provided directly below the sump, which is intended to minimize the overall height due to the small distance in the vertical direction. Furthermore, such a water conduction is simplified because no water pipes have to be provided in between.

From the WO 2019/025849 A1 Another household appliance in the form of a washing machine is known in which a pump is provided next to a sump or sump lower part laterally offset. The pump is also designed as an impeller pump and is arranged in such a way that an area at the pump inlet is, so to speak, divided into two areas, namely an antechamber and a suction area. Water from the sump should usually be present in the antechamber, and this water can then be sucked into the suction area by the impeller through an opening for pumping. A pump outlet goes away from the impeller in the radial direction.

Task and solution

The invention is based on the object of creating a water-carrying household appliance mentioned at the beginning with which problems of the prior art can be solved and in particular it is possible to advantageously be able to pump water in the household appliance while requiring as little space as possible.

This object is achieved by a water-conducting household appliance with the features of claim 1. Advantageous and preferred embodiments of the invention are the subject matter of the further claims and are explained in more detail below. The wording of the claims is made part of the content of the description by express reference.

The water-bearing household appliance has, in addition to the water treatment room and the water conduit towards and away from it, a treatment chamber which can be closed and in which objects can be treated. In the case of a dishwasher, this is a conventional, essentially box-shaped treatment chamber which can be closed from the front with a door. Crockery and cutlery can be cleaned in it. In the case of a washing machine, a rotatable drum is usually arranged in the treatment chamber, which is accessible from the front or alternatively from above and can be rotated by a drum motor.

A water inlet is provided in the treatment chamber, which can advantageously be designed in the usual way. A sump is provided at the bottom of the treatment chamber, which can likewise advantageously be designed in the usual way. A sump water outlet leads away from the sump in a lateral direction. It can have an angle to the horizontal that is between 0 ° and a maximum of ± 25 °. This means that the sump water outlet can lead away to the side approximately horizontally, but can also be inclined slightly upwards or, above all, downwards. An impeller pump is also provided, which has a pump inlet, a pump outlet, a pump chamber in between and an impeller arranged therein. A pump motor is provided to drive the impeller. The pump inlet into the pump or into the pump chamber is connected to the sump water outlet. It can advantageously be provided that a pump chamber cover is connected directly to the sump water outlet, alternatively a short pipe socket on the pump chamber cover is connected to it. Thus, viewed in the vertical direction, the pump chamber can be as close as possible to the sump water outlet or, if possible, not very high above it. This makes it possible to reduce the overall height, which is particularly important for such household appliances. The treatment chamber can then possibly be made larger.

According to the invention, the pump chamber runs around like a ring or is at least partially ring-like, in particular it adjoins an area around the impeller, advantageously as an annular chamber. It is provided that the pump chamber at least partially revolves around the pump motor and / or that the pump motor, viewed in the axial direction, is at least partially surrounded by the pump chamber. Furthermore, the pump outlet from the pump is arranged higher than the impeller; viewed in the axial direction, it is advantageously in the uppermost region of the pump chamber.

The invention thus makes it possible to pull the pump motor into the pump chamber, so to speak, or to guide the pump chamber around the pump motor, whereby the pump chamber With the design that encircles the pump motor in a ring-like manner, it can have a certain axial height, but this does not necessarily increase the overall height, since the pump motor is present here anyway and the two can be integrated into one another.

In an advantageous embodiment of the invention, the sump water outlet is provided at the bottom of the sump, in particular it is provided at the lowest area of the sump. It can thus be provided that as much or all of the water as possible can be pumped out of the sump and thus removed by means of the impeller pump. This is an advantage for reasons of hygiene.

In a further advantageous embodiment of the invention, a lowermost point of the pump outlet, viewed in the axial direction of the pump, can be at the level of the drive motor or even higher than the drive motor. This enables a pump chamber which is relatively elongated in the axial direction, but which increases the overall height only insignificantly or not at all. This is particularly advantageous when, as will be explained below, heating is provided in the pump chamber or on the pump chamber.

In a preferred embodiment of the invention, the sump is funnel-shaped at least in an upper area, in particular where it, so to speak, merges into the treatment chamber or adjoins it. It is preferably flat, funnel-shaped. It can be tapered towards the bottom. It can preferably also be cylindrical or round cylindrical in a lower region, in particular running essentially vertically. The sump can be designed as a structural unit made up of several components that are connected to one another. Such a connection can be permanent and permanent, especially glued or welded. Alternatively, parts can be plugged together or locked. The sump can be closed in the upper area, in particular essentially at an upper edge, by a sieve or a similar flat structure with small openings, which is preferably lowered or deepened towards the center. A downward opening can be provided in the middle, which larger objects such as cherry stones can pass through in a dishwasher. So they can be collected or removed from the water for circulation.

The sump water outlet can advantageously extend in the horizontal direction to the side of the sump and lead to the impeller pump or to its pump inlet. The sump water outlet can be designed as a type of channel over this route. A bottom of the sump water outlet can at the same time form a substantial part of the bottom of the sump or lie in the same plane with it.

Viewed in the axial direction, the impeller can advantageously be arranged at the level of the sump. It is therefore higher than the sump water outlet. The pump motor is also advantageously at the level of the sump when viewed in the axial direction, in practice a few centimeters above the impeller. Particularly advantageously, the pump outlet can also be arranged at the level of the sump, seen in the axial direction, at least below an aforementioned sieve or structure as the upper closure of the sump towards the treatment chamber. The entire impeller pump can thus have a height in the axial direction which corresponds approximately to the height of the sump as the aforementioned structural unit or does not protrude beyond it. With this design, the entire vertical height can be visibly minimized.

In an embodiment of the invention, the pump outlet can run in a direction essentially at right angles to the axis of rotation of the impeller, that is, it can branch off to the side. This direction of progress is given in particular where the pump outlet emerges from an extension of a shell shape of the pump chamber. In this area, its direction should be essentially perpendicular to the axis of rotation of the impeller. It can advantageously extend tangentially from the pump chamber. After that, under certain circumstances it can also be bent or inclined upwards or downwards. Since water set in rotation by the impeller can circulate several times in the pump chamber, it so to speak scrolls upwards from the impeller to the pump outlet.

In a preferred embodiment of the invention, the aforementioned pump outlet is designed as the uppermost area or as the uppermost part of the pump chamber. The pump outlet can advantageously also form the uppermost area of the entire impeller pump or the rest of the impeller pump lies below it. This also helps to keep the axial overall height low.

At least one heating element is preferably provided in or on the pump chamber. Such a heating element can particularly preferably be provided on an outside of the pump chamber. It can be arranged at the level of the impeller, seen in the axial direction, so that water conveyed by the impeller comes as directly as possible to the wall of the pump chamber, where it can then be heated by the at least one heating element. In a further embodiment of the invention, the heating element can protrude upward beyond the impeller as seen in the axial direction. The water conveyed by the impeller can thus be heated as well as possible, in particular if it then circulates in the pump chamber towards the pump outlet.

In an advantageous embodiment of the invention, the pump motor can be designed as a wet rotor. It can be washed around by the water from the pump chamber. The resulting waste heat of the pump motor can be diverted into the water, which can thus lead to a better and more efficient overall system or which can lead to better efficiency in the introduction of heat into the water.

An axis of rotation of the impeller is preferably oriented vertically, so that the aforementioned axial direction of the pump motor is the vertical. As a result, a maximally compact design can be achieved, especially if the sump together with the lower round cylindrical area is aligned vertically.

In a further embodiment of the invention, it can be provided that a further sump drain outlet extends from the sump. This can come off particularly advantageously from the deepest point of the sump. The sump drain outlet can lead to a drain outlet from the entire household appliance, either directly or via a drain pump for pumping the water out of the household appliance to the aforementioned drain outlet. At such a sump drain outlet, coarser or larger parts of the water in the treatment chamber, for example with a size of 5 mm or more such as cherry stones in a dishwasher, which have been held back by a so-called coarse-part trap at the bottom of the sump, and flushed out of the household appliance will. They do not have to be removed by hand by an operator. Furthermore, the above-mentioned coarse-part trap, possibly also by further sieves or filter devices in the sump or behind it, can prevent these parts from getting into the impeller pump. They could impair their function, in particular damage or even destroy them. Such a sump drainage outlet can connect directly to a coarse-part trap. In particular, the sump drain outlet can be slightly sloping or run downwards from the coarse-part trap so that coarse parts can be easily rinsed out and in no case can they get back into the sump or the treatment room.

In an advantageous embodiment of the invention, the lower part of the sump is formed by a single sump component which is formed in one piece. This relates in particular to a tubular design of the sump below the funnel shape or the expanded shape, the sump water outlet extending in one piece from the component and leading to the impeller pump. Here, the sump drain outlet can also be provided on the component, in particular as a pipe socket extending from the sump. It can also be designed in one piece with the sump component. The one-piece design results in a higher manufacturing cost. At the same time, however, the risk of leaks or the expense for a seal can be reduced, which is considered to be very advantageous.

The pump chamber can advantageously be designed with an annular cross-section around the pump motor, in particular with an annular cross-section, and this at least partially over its height as seen in the axial direction. Part of the outer wall of the pump chamber can be heated by an aforementioned heating element or have the heating element on the outside. At least 50% of the pump chamber can be heated, in particular 60% to 80%.

The pump outlet can advantageously form the highest area of the impeller pump when viewed as a structural unit. It can merge into a pipe socket that is between 2 cm and 5 cm long and protrudes from the extension of the jacket shape from the outside of the pump chamber. A water pipe or a hose can be connected to the pipe socket.

In a further embodiment of the invention, an additional outlet from the pump chamber is provided, including an additional outlet flap thereon or for it. The additional outlet flap has a closed position and at least one open position. Between these two positions it is movable, advantageously designed to be rotatable, alternatively bendable. It is preferably designed to be rotatable about an axis, that is to say it is rotatably mounted and not only designed to be elastically movable and deflectable, for example by bending or twisting. In the closed position, the additional outlet flap closes the additional outlet, advantageously largely or even completely. For this purpose, the additional outlet flap can be approximately as large as the additional outlet, advantageously somewhat larger. In each of the open positions, the additional outlet is at least partially open or the additional outlet flap at least partially releases or opens it. Depending on the open position, the additional outlet can therefore be more or less open.

In addition, an adjusting means is provided, whereby the additional outlet flap is so force-loaded that it is automatically moved from the closed position into one of the open positions when no fluid or water is pumped from the inlet to the outlet or when the additional The outlet flap is free of fluid flow in the direction of rotation of the impeller for pumping the fluid during normal operation. The adjusting means can therefore bring the additional outlet flap at least into the first open position or into the least open open position. Under certain circumstances it can therefore be sufficient if the actuating means open the additional outlet flap only a little. It can thus be achieved that in the closed position no fluid escapes through the additional outlet or is conveyed out of the pump chamber during pumping. After all, the fluid should be conveyed normally from the inlet to the outlet. The fluid flow can even help to close the additional outlet flap in the closed position hold, as it depresses it, for example. If there is no fluid flow, the additional outlet flap should automatically open at least partially. Then, by reversing the direction of rotation of the impeller, as will be explained below, it is possible to convey into the at least partially open additional outlet flap or past it into the now at least partially open additional outlet and thus fluid to another outlet of the impeller pump, preferably to a drainage line.

Due to the special design of the additional outlet flap including actuating means, which are advantageously passive actuating means, particularly advantageously an elastic design or a separate spring, with the automatic opening, actuators such as electromagnets, piezo drives or electric motors that need to be controlled specifically can be dispensed with. This considerably simplifies the construction of the impeller pump and its operation. Furthermore, installation space can also be saved.

These and other features emerge from the claims and also from the description and the drawings, the individual features being implemented individually or in combination in the form of sub-combinations in one embodiment of the invention and in other areas and being advantageous and protectable per se Can represent designs for which protection is claimed here. The subdivision of the application into sub-headings and individual sections does not limit the general validity of the statements made under these.

Brief description of the drawings

Fig. 1

eine schematische Ansicht einer Spülmaschine als erfindungsgemäßes wasserführendes Haushaltsgerät,

Fig. 2

eine Schrägansicht von oben auf einen Sumpf der Spülmaschine samt Sumpf-Wasserauslass und daneben angeordneter Impellerpumpe,

Fig. 3

eine Seitenansicht der Anordnung aus Fig. 2,

Fig. 4

einen Schnitt durch die Anordnung aus Fig. 3 und

Fig. 5

eine Abwandlung der Anordnung aus Fig. 3 mit einem zusätzlichen Zusatz-Auslass aus der Pumpenkammer der Impellerpumpe.

Embodiments of the invention are shown schematically in the drawings and are explained in more detail below. In the drawings show:

Fig. 1

a schematic view of a dishwasher as a water-carrying household appliance according to the invention,

Fig. 2

an oblique view from above of a sump of the dishwasher including the sump water outlet and an impeller pump arranged next to it,

Fig. 3

a side view of the arrangement Fig. 2 ,

Fig. 4

a section through the arrangement Fig. 3 and

Fig. 5

a modification of the arrangement Fig. 3 with an additional additional outlet from the pump chamber of the impeller pump.

Detailed description of the exemplary embodiments

In the Fig. 1 a dishwasher 11 is shown schematically as a water-carrying household appliance according to the invention, with a housing 12 and a washing space 14 as a water treatment space therein, which in principle is designed as usual and known. At the top of the washing area 14, a conventional washing arm 16 is indicated, although more washing arms can of course also be provided therein, in particular also in the lower area. At the bottom, the washing chamber 14 has a floor 17 which merges in the middle into a large depression 18 which is designed like a funnel and forms part of a sump 19 with a previously described drain. The recess 18 can also be partially covered, for example by a sieve, grille, filter or the like. The walls of the washing area 14 and the base 17 are usually made of metal or stainless steel. The recess 18 can consist of plastic, alternatively also of metal.

The sump 19 is up to the out Fig. 2 easily recognizable large sump opening 20 or the like with an aforementioned flat sieve. covered. The sump 19 merges downward into a cylinder section 22 which has a central axis 30 shown in dash-dotted lines. The cylinder section 22 has a bottom 23 at the bottom. A grid insert 25, advantageously made of plastic, is placed on it or is located thereon. The grid insert 25 has an upper part 26a, a middle part 26b and a lower part 26c. From the Fig. 3 it can be clearly seen that the upper part 26a projects beyond the plane of the sump opening 20 and thus also a sieve or the like arranged here. pierces upwards. In the interior of the upper part 26a there is then no sieve or the like. intended. The openings in the upper part 26a are the largest or larger than those in the central part 26b, which is designed to be slightly tapered downwards. This is in turn followed by the lower part 26c at the bottom with even smaller vertical grid openings. Coarser parts such as cherry stones can enter the central area through the large openings in the upper part 26a and are then held back by a coarse-part trap 28, which is formed at the bottom in the grille insert 25 mainly by the lower part 26c, from the rest of the sump. They can be flushed out to the left in a known manner to a sump drain outlet 32 and then drained off from the dishwasher 11 to a drain outlet 35. The sump discharge outlet 32 can accordingly Fig. 1 be arranged somewhat lower than the bottom 23 of the cylinder section 22 or the sump 19. Alternatively, according to the Figs. 2 to 4 also be arranged a little higher.

A sump water outlet 34 extends horizontally to the right of the sump 19. The sump water outlet 32 leads to an impeller pump 36. This can pump or convey water, specifically through the water return 38 as a water line back to the rinsing arm 16 as circulation.

The impeller pump 36 has, as its lowest part, a pump inlet 41 which extends from above into the sump water outlet 34 or the channel formed by it. The water return 38 is connected to a pump outlet 43, which according to FIGS Figs. 2 to 4 Is formed like a pipe socket. He stands according to the Fig. 3 and 4th at a right angle to a central axis 55 of the pump or a drive motor 54 for it.

The impeller pump 36 has a pump chamber 45, which is provided in the lower region as a lower pump chamber 45a that is flat but wide. Seen upward in the axial direction, the pump chamber 45 extends into a narrow area as a circular pump chamber 45b. The pump outlet 43 leads away from here to the outside.

An impeller 52 is arranged in the lower pump chamber 45a. It sits relatively close behind the pump inlet 41. Furthermore, a guide device 50 is provided in the transition between the two pump chambers 45a and 45b, which serves primarily to carry the water set in rotation by the impeller 52, which, so to speak, circulates in the pump chamber 45a to provide a movement component in the axial direction or to direct it in the axial direction. Thus, the water screws itself with a few revolutions, for example two to five revolutions, up to the pump outlet 43.

The drive motor 54 of the impeller pump 36 has a central axis 55, shown in dash-dotted lines, which defines the aforementioned axial direction. It runs exactly vertically here. The drive motor 54 has a rotating stator 56 and a rotor 57 located therein with an axis 58 on which the impeller 52 is fastened.

Furthermore, the impeller pump 36 has a heating system for pumped water on a jacket wall 47, which forms a large part of the outer wall of the pump chamber 45b and the complete border of the pump chamber 45a. At least one heating element 48 is provided on the outside of the jacket wall 47, which advantageously consists of metal. This is particularly advantageously a thick-film heating element with a plurality of tracks in order to essentially heat a large part of the surface of the jacket wall 47. So the water can be heated when pumping or pumping. However, this is basically known from the prior art, see FIG EP 2150165 B1 .

From the representations, especially the Fig. 3 and 4th It can be seen that the low overall height of the arrangement shown, viewed in the axial direction, results primarily from the fact that the impeller pump 36 is no longer arranged below the sump 19, as is known from the prior art mentioned at the beginning. Rather, the arrangement provided next to it saves a considerable amount of overall height. Furthermore, the impeller pump 36 itself is designed to be as compact as possible when viewed in the axial direction, so that it has the lowest possible overall height when viewed in the axial direction, but in the exemplary embodiment provided here also enables the pumped water to be heated by means of the heating element 48. For this purpose, the pump chamber 45a and above all 45b must have a special shape, so that it is ensured that the pumped water remains in the pump chamber for a little longer. It can thus be heated up better, which explains the relatively large expansion of the pump chamber 45a and, above all, 45b in the axial direction. Because the drive motor 54 has, so to speak, been drawn inward into the interior of the pump chamber or is arranged there, the overall height of the arrangement is relatively low. In this way it can also be achieved that the pump outlet 43 is well above the impeller 52, forms the uppermost area of the pump chamber 45b and at least its uppermost area extends at least as high as the drive motor 54 or even a little higher. Thus, for example, the water return 38 can also be made somewhat shorter and, above all, can also easily lead away from the impeller pump 36.

It's from the Fig. 4 It can also be seen that the impeller 52 is higher than the sump water outlet 34, in particular that which is also higher than the lowermost part of the sump drain outlet 32.

Regarding the sump 19, it should also be said that it can be made of plastic. In particular, the grid insert 25 is obviously advantageously designed as a plastic in order to be able to achieve the shape shown. The tapered recess 18 can either be strongly tapered, as this is the case Fig. 1 suggests, or only slightly tapers, like this the Fig. 3 and 4th demonstrate. The main issue here is that water can converge and drain over a large area in the lower area of the treatment room 14 or on its floor 17 and, in particular, after it has been cleaned and at least freed from coarse particles, it is returned to the treatment room by the impeller pump 36 14 can be pumped. In doing so, due to the passage through the heating element 48 in the pump chamber 45a and 45b, it can be heated by a few ° C. in each case, so that it can overall reach a desired temperature.

The cylinder section 22 together with the sump drain outlet 32 is also advantageously manufactured as a one-piece part made of plastic. The sump water outlet 34 can also be integrally formed here; alternatively, it can be manufactured separately, which considerably simplifies manufacture. It can then be firmly and permanently connected to the cylinder section 22, for example glued or welded by means of plastic welding known per se.

In the Fig. 5 is a modification of the arrangement Fig. 3 shown with an additional additional outlet 144 from the impeller pump 136 or from its lower pump chamber, the impeller pump 136 otherwise being designed as in FIG Fig. 3 . The additional outlet 144 goes from below to a lower point or the lower pump chamber, which is not shown here but as in the sectional drawing of FIG Fig. 4 is trained. It is advantageously the lowest possible point of the lower pump chamber apart from the pump inlet 141. An outlet flap 146, shown in dashed lines, is provided here, as is shown in FIG DE 102017221732.4 is known to the same applicant with the filing date of December 17, 2017, to which reference is hereby explicitly made, and as explained above.

The outlet flap 146 is in plan view of the Fig. 5 arranged in front of the impeller, the direction of rotation in Fig. 4 right out of the drawing plane and left into the drawing plane. With the resulting direction of circulation of the pumped water towards the pump outlet 143, the water flow presses the outlet flap 146 downwards or closes it and thus also the access to the additional outlet 144, so no water escapes. The outlet flap 146 is designed or spring-loaded in such a way that it is actually open by itself, as shown here by dashed lines. Residual water can thus even flow out of the pump chamber automatically into the additional outlet 144. If the impeller pump 136 reverses its direction of rotation, the water in the pump chamber circulates in the opposite direction and is, so to speak, conveyed directly to the outlet flap 146 out of the pump chamber. It then exits to the additional outlet 144, advantageously to a drain outlet from the entire device. In this way, not only can the pump or its pump chamber itself be completely emptied, the sump can also be specifically pumped out.

Claims (15)

Water-carrying household appliance with a water treatment room and with a water supply from and / or to the water treatment room, in particular a dishwasher or washing machine, the household appliance having: - a treatment chamber that can be locked and in which objects can be treated, - at least one water inlet into the treatment chamber, - a sump down in the treatment chamber, a sump water outlet from the sump, the sump water outlet leading away from the sump in a lateral direction at an angle to the horizontal between 0 ° and a maximum of ± 25 °, - an impeller pump with a pump inlet, a pump outlet, a pump chamber, an impeller arranged in the pump chamber and a pump motor for driving the impeller, the pump inlet being connected to the pump with the sump water outlet, characterized in that - the pump chamber rotates in a ring-like manner and the pump motor is at least partially surrounded by the pump chamber when viewed in the axial direction, - the pump outlet from the pump is arranged higher than the impeller. Household appliance according to claim 1, characterized in that the sump water outlet is provided at the bottom of the sump or at the lowest area of the sump. Household appliance according to claim 1 or 2, characterized in that a lowermost point of the pump outlet, viewed in the axial direction, lies at the level of the drive motor or above the drive motor. Household appliance according to one of the preceding claims, characterized in that the sump is funnel-shaped at least in an upper area and is tapered downwards, the sump preferably being designed as a unit of several components that are connected to one another. Household appliance according to one of the preceding claims, characterized in that the sump water outlet branches off in the horizontal direction to the side from the sump to the impeller pump or to the pump inlet. Household appliance according to one of the preceding claims, characterized in that the impeller is arranged at the level of the sump when viewed in the axial direction, in particular the pump motor is also located at the level of the sump when viewed in the axial direction, the pump outlet preferably also at the level when viewed in the axial direction of the sump is arranged. Household appliance according to one of the preceding claims, characterized in that the pump outlet runs in a direction essentially at right angles to the axis of rotation of the impeller, in particular where the pump outlet emerges from an extension of a shell shape of the pump chamber. Household appliance according to one of the preceding claims, characterized in that the pump outlet is designed as the uppermost area or as the uppermost part of the pump chamber. Household appliance according to one of the preceding claims, characterized in that a heating element is provided in or on the pump chamber, in particular on an outside of the pump chamber, the heating element preferably being arranged at the level of the impeller viewed in the axial direction, in particular the impeller viewed in the axial direction towers above. Household appliance according to one of the preceding claims, characterized in that the pump motor is a wet rotor and is washed by the water from the pump chamber. Household appliance according to one of the preceding claims, characterized in that an axis of rotation of the impeller runs vertically. Household appliance according to one of the preceding claims, characterized in that a further sump drain outlet leads from the sump, in particular at the deepest point of the sump, wherein the sump drain outlet preferably leads to a drain outlet from the household appliance or to a drain pump Pumping the water out of the appliance to a drain outlet. Household appliance according to one of the preceding claims, characterized in that the sump has a coarse-part trap for catching coarse parts and for filtering these coarse parts out of the water from the treatment chamber, in particular the coarse-part trap is arranged at the bottom in the sump, the sump drainage outlet preferably being arranged behind the coarse-part trap for rinsing out coarse parts. Household appliance according to one of the preceding claims, characterized in that the lower part of the sump is formed in one piece by a single sump component, the sump water outlet to the impeller pump extending therefrom in one piece, the sump drain outlet preferably having a pipe socket extending from the sump which is formed in one piece on the sump component and which leads to a point which lies below the sump water outlet or which, viewed in the axial direction, lies below it. Household appliance according to one of the preceding claims, characterized by an additional outlet from the pump chamber including an additional outlet flap, the additional outlet flap: - has a closed position and at least one open position, - is designed to be movable between the closed position and the at least one open position, - closes the additional outlet in the closed position and at least partially releases or opens the additional outlet in each of the open positions, - Has an actuating means and is so force-loaded by the actuating means that the additional outlet flap is automatically moved from the closed position into one of the open positions when the additional outlet flap is free of fluid flow in the direction of rotation of the impeller for pumping fluid from the inlet to the Outlet is.

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