WO2025238000A1 - Filter system and domestic dishwasher - Google Patents

Abstract

The invention relates to a filter system (17) for a domestic dishwasher (1), comprising a filter support (38) and at least one filter insert part (36, 37), wherein the filter support (38) has a plurality of connecting elements (40) for fastening the at least one filter insert part (36, 37) on the filter support (38), wherein each of the plurality of connecting elements (40) has an upper connecting-element part (48) and a lower connecting-element part (49), which are connected to one another within a plurality of cutouts (45) in the at least one filter insert part (36, 37), wherein the plurality of cutouts (45) are arranged along the plurality of connecting elements (40), and wherein each of the plurality of cutouts (45) is in the form of a slot.

Description

Sieve system and household dishwasher

The present invention relates to a sieve system for a household dishwasher and a household dishwasher with such a sieve system.

A household dishwasher has a wash tub in which the dishes are placed. Spray devices, for example in the form of rotating spray arms, may be provided in the wash tub to spray the dishes 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 filter system is attached. The filter system covers at least part of the pump sump. Wash water and/or fresh water can pass through the filter system to be filtered. A circulation pump is connected to the pump sump, which supplies the filtered wash water and/or fresh water to the spray devices via the hydraulic circuit. A drain pump is also connected to the pump sump, which is designed to pump out dirty wash water and/or fresh water from the hydraulic circuit. Due to the build-up of dirt in the filter system during a household dishwasher cycle, it may be necessary to clean the clogged filter system periodically to maintain good filtration and, consequently, optimal washing performance. According to internal experience, a filter cleaning nozzle may be integrated into one of the spray heads, for example, to clean the filter system by spraying it with wash water and/or fresh water.

According to internal findings, warping of the filter system frequently occurs during its manufacture, which can result in at least some sections of the filter system being tilted relative to the horizontal when installed in a household dishwasher. Additionally, the wash water and/or fresh water used for cleaning the filter can bounce off protruding ribs of the filter system, and/or dirt can accumulate behind these ribs in the "wind shadow." This can negatively affect not only the filtering effect of the sieve system, but also its cleaning using the sieve cleaning nozzle.

Against this background, one object of the present invention is to provide an improved sieving system.

Accordingly, a sieve system for a household dishwasher is proposed, comprising a portafilter and at least one sieve insert, wherein the portafilter has a plurality of ribs for attaching the at least one sieve insert to the portafilter, wherein each of the plurality of ribs has a rib upper part and a rib lower part, which are connected to each other within a plurality of cutouts of the at least one sieve insert, wherein the plurality of cutouts are arranged along the plurality of ribs, and wherein each of the plurality of cutouts has the form of an elongated hole.

By connecting one of the upper and one of the lower rib sections together, the sieve system can be designed to be particularly stable with regard to bending and/or warping, while simultaneously being particularly lightweight and/or requiring minimal material. In this respect, the sieve system, and especially the majority of the ribs, can be designed as lightweight components. Because the connection between the upper and lower rib sections occurs within a plurality of cutouts arranged along the majority of the ribs, each upper and lower rib section can be connected at multiple points, particularly sequentially. This allows the upper and lower rib sections to be connected during manufacturing, thereby reducing and/or preventing warping of the sieve system. If the sieve system is manufactured using an injection molding process, material exchange between the upper and lower rib sections can occur within the plurality of cutouts during manufacturing, further reducing and/or preventing warping. Furthermore, by dividing the bridge into an upper and a lower part, the upper part can be designed in such a way that dirt accumulation in the area of the upper part can be reduced and/or prevented. Because the cutouts are each shaped like an elongated hole, the aforementioned material exchange between the upper and lower parts of the screen can be maintained for a particularly long period. Especially when manufacturing the screen system using an injection molding process, this allows multiple flow fronts, which occur when injection molding material is injected into a mold to form the upper and lower parts of the screen, to be synchronized in terms of timing and/or speed. This enables the injection molding of the upper and lower parts, as well as their respective solidification, to occur simultaneously. This further reduces and/or prevents warping of the screen system. Furthermore, this reduces and/or prevents at least one screen insert from floating in the mold during the injection molding process, which could result in the upper part of the screen not adequately covering it, potentially leading to visual defects.

The sieve system, in particular the at least one sieve insert, is fluid-permeable, at least in sections. "Fluid-permeable" in this context means that rinse water and/or fresh water can flow through the sieve system. "Rinse water" in this context refers to water containing a cleaning agent and/or dirt particles removed from the items being washed. The at least one sieve insert may have a perforation with a multitude of openings for this purpose.

The sieve system can also have multiple sieve inserts. With multiple sieve inserts, the perforations in these inserts can have different sizes. This means that the cross-sectional areas of their perforations can differ from one another.

The sieve system can have any geometry. For example, the sieve system can be ring-shaped or ring-segment-shaped. The sieve system can also be rectangular or elliptical. Preferably, the sieve system is circular. The sieve system is preferably removable. This makes it possible, for example, to remove the sieve system from a household dishwasher. The at least one sieve insert can be positively connected to the sieve holder. A positively connected The connection is created by the interlocking and/or overlapping of two components. The portafilter can be a plastic component. At least one of the filter inserts can be grid-like or net-like.

According to one embodiment, the portafilter is designed as a plastic injection molded part, wherein the portafilter is preferably designed as an integral component, and wherein the portafilter is particularly injection molded in a single plastic injection molding process.

The fact that the portafilter is designed as an integral component means that all parts of the portafilter, especially the majority of the ribs, constitute a single, one-piece component that cannot be separated non-destructively after manufacturing. This simplifies and speeds up production and results in a particularly robust portafilter.

According to a further embodiment, the upper part of the bridge is arranged on a top side of the at least one sieve insert and the lower part of the bridge is arranged on a bottom side of the at least one sieve insert, the bottom side being arranged on an outer side of the at least one sieve insert facing away from the top side.

In other words, at least one filter insert is arranged between the upper and lower parts of the filter basket, with this arrangement relating specifically to a vertical direction. In this context, "vertical direction" can be understood as a direction towards the Earth's center. Furthermore, in the standard configuration of a household dishwasher, this direction is oriented parallel to the dishwasher's vertical axis. This allows for a positive connection between the majority of the filter baskets and the at least one filter insert. Additionally, this arrangement positions the upper and lower parts of the filter baskets apart, further increasing the stability of the filter system, particularly the filter basket itself, with respect to bending. Specifically, it increases the area moment of inertia of the majority of the filter baskets.

According to a further embodiment, with respect to a cross-sectional plane, the upper part and the lower part of a particular web of the plurality of webs have different cross-sectional shapes, wherein the cross-sectional plane is perpendicular The web is oriented towards a main direction of expansion, and the cross-sectional shapes preferably differ in their area. The cross-sectional shape of the lower web section is particularly preferably larger than that of the upper web section.

The term "principal direction of extension of a particular web" refers to the direction along which the web has its greatest extent. The cross-sectional plane therefore penetrates at least the specific web and is perpendicular to its principal direction of extension. With respect to the cross-sectional plane, the upper part of the web may, for example, have a flat cross-sectional shape, extending predominantly along a horizontal direction with only a slight vertical height. Conversely, the lower part of the web may have a cross-sectional shape that extends predominantly along the vertical direction. Because the cross-sectional shape of the lower part of the web may be larger than that of the upper part, the lower part can be thicker and/or more resistant to bending than the upper part. In other words, the majority of the webs may be asymmetrically designed, with a large portion of the material necessary for the stability of the sieve system located below the at least one sieve insert. Advantageously, this allows the upper part of the screen to be thin and/or flat in the vertical direction, despite the overall high stability of the screen system. The relatively flat and/or thin cross-sectional shape of the upper part of the screen is advantageous in terms of minimizing dirt accumulation on the majority of the screens. In particular, this is beneficial for cleaning the screen system, as less rinse water and/or fresh water is deflected and/or slowed down by the relatively flat or thin upper part of the screen. This asymmetry can also be advantageous for aesthetic reasons.

According to another embodiment, with reference to the cross-sectional plane, the lower web height of the lower web section is equal to or at least 1.5; 2; 3; 5; 7.5; 10; 15; or 20 times greater than the upper web height of the upper web section.

According to another embodiment, the sieve system is at least partially circular, with the majority of the ribs preferably oriented along a radial axis. extend in the direction of the sieve system. The sieve holder particularly preferably has a circular outer ring which encompasses the majority of the ribs.

In other words, the majority of the ribs extend outwards in a star-shaped pattern from a centrally located axis of the sieve system. Each of these ribs extends to the circular outer ring. Two of the ribs, along with a section of the outer ring, comprise a sieve area, which may, for example, have the shape of a circular segment. The circular design of the sieve system is particularly advantageous for cleaning, as it ensures that the sieve cleaning nozzle is guided along the sieve system when one of the spray arms rotates.

According to a further embodiment, each of the at least one sieve insert part has positioning openings for its fixation in an injection mold.

Using the positioning openings and the pins inserted therein, each of the at least one sieve insert component can be fixed in an injection mold and also easily gripped by robotic arms. This simplifies and/or speeds up the manufacturing of the sieve system.

According to a further embodiment, the positioning openings comprise a positioning bore and a positioning slot, wherein the positioning slot preferably has a cross-section in the form of an elongated hole. Particularly preferably, the positioning bore has a circular cross-section.

When fixing at least one sieve insert in the injection mold, the sieve insert can be fixed in two directions using the positioning bore, which are perpendicular to each other and both horizontally oriented. In contrast, the sieve insert can only be fixed in one direction using the positioning slot, thus advantageously avoiding over-constraint, a so-called double fit.

According to another embodiment, at least one of the positioning openings is integrated into one of the cutouts. This can be understood to mean that one of the cutouts, in addition to connecting the upper and lower bridge sections, can also be used as one of the positioning openings. During the injection molding process, one of the positioning pins can therefore be positioned in one of the cutouts. Advantageously, this eliminates the need to manufacture an additional positioning opening and thus simplifies the production of at least one sieve insert.

According to a further embodiment, the sieve system comprises a plurality of sieve inserts, wherein the plurality of sieve inserts, viewed along a central axis of the sieve system, preferably each have the shape of a circular segment. Particularly preferably, the sieve system comprises exactly two sieve inserts.

According to a further embodiment, the majority of the sieve inserts have different hole spacings, wherein preferably one of the sieve inserts is a fine sieve with a plurality of fine sieve holes and a fine sieve hole spacing, and another of the sieve inserts is a woven sieve with a mesh size, wherein the fine sieve hole spacing is preferably larger than the mesh size. The fine sieve is particularly preferably made of metal.

Alternatively, the sieving system can also consist of multiple fine sieves, which may differ in their mesh spacing. It is also conceivable that the sieving system consists of multiple woven sieves, which differ in their mesh size. The mesh spacing can also be the same size as or smaller than the mesh size. Furthermore, it is also conceivable that the fine sieve is made of plastic.

According to another embodiment, the fabric sieve has a fabric with fibers, wherein the fibers extend along at least two different directions, and wherein the fibers are preferably made of metal.

However, it is also conceivable that the fibers are synthetic fibers, for example Aramid fibers, or natural fibers. According to a further embodiment, each sieve insert has a plurality of sieve areas, wherein adjacent sieve areas are separated from each other by means of one of the plurality of ribs.

Each sieve insert is supported by at least three of the plurality of ribs. Each sieve insert therefore extends over at least three of the plurality of ribs and/or extends to them. Preferably, each sieve insert is supported by four ribs, thus each sieve insert has three sieve areas. Here, the plurality of sieve areas of the sieve insert are preferably not separated from one another, but rather form an integral component. The sieve areas can also be referred to as windows of the sieve insert.

According to a further embodiment, the portafilter has at least one portafilter screen, wherein the at least one portafilter screen preferably has a plurality of portafilter holes. Particularly preferably, the portafilter screen is integrally connected to the portafilter.

The at least one portafilter basket can be arranged centrally around the central axis of the sieve system. Alternatively, the at least one portafilter basket can also be arranged along the circular ring. Preferably, the sieve system has a plurality of portafilter baskets arranged at several locations within the sieve system. This further increases the fluid permeability of the sieve system.

According to another embodiment, the portafilter has at least one recess, preferably the at least one recess being designed for the integration of a coarse sieve.

Furthermore, a household dishwasher is proposed with a wash container for receiving items to be washed, a pump sump provided on the wash container, and a sieve system as described above, wherein the sieve system covers the pump sump at least partially. The wash tub is preferably cuboid in shape. It can be closed by means of a hinged door. The wash tub can contain several compartments, for example, a lower basket, an upper basket, and a cutlery drawer. The items to be washed are placed in these compartments and are supplied with wash water and/or fresh water by means of a hydraulic circuit of the household dishwasher. A drain pump and a circulation pump are preferably part of the hydraulic circuit. "Supplied" in this context can include spraying or wetting the items.

The phrase "provided for" the pump sump on the flushing tank means, in particular, that the pump sump is attached to or mounted on the flushing tank. Specifically, the pump sump may be attached to the bottom of the flushing tank. The pump sump may be part of the bottom. The pump sump may also be referred to as the pump pot.

Furthermore, a method for manufacturing a filter system for a household dishwasher is proposed, comprising a filter holder and at least one filter insert. The filter holder has a plurality of ribs, each of which has a rib upper part and a rib lower part connected to one another within a plurality of cutouts in the at least one filter insert. The plurality of cutouts are arranged along the plurality of ribs, and each of the plurality of cutouts has the form of an elongated hole. The method comprises: positioning the at least one filter insert in an injection mold by means of positioning pins arranged within the positioning openings; and injection molding the plurality of ribs in a single plastic injection molding operation, wherein one of the rib upper parts and one of the rib lower parts are bonded together within a plurality of the cutouts.

Other possible implementations of the invention 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 invention. Further advantageous embodiments and aspects of the invention are the subject of the dependent claims and the exemplary embodiments of the invention described below. The invention will be explained in more detail below with reference to preferred embodiments and the accompanying figures.

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

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

Fig. 3 shows a schematic perspective view of an embodiment of a sieve system for the household dishwasher according to Fig. 1;

Fig. 4 shows another schematic perspective view of the sieve system according to Fig. 3;

Fig. 5 shows a schematic top view of the sieve system according to Fig. 3;

Fig. 6 shows a schematic perspective and partially cutaway view of the sieve system according to a section line A-A of Fig. 3;

Fig. 7 shows a schematic sectional view of the sieve system according to a further section line B-B of Fig. 3;

Fig. 8 shows a schematic top view of embodiments of a fine sieve and a woven sieve for the sieve system according to Fig. 3;

Fig. 9 shows a schematic detail view of the fine sieve according to Fig. 8; and

Fig. 10 shows a schematic detail view of the fabric sieve according to Fig. 8.

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

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.

The household dishwasher 1 further comprises at least one dishware holder 12 to 14. Preferably, several, for example three, dishware holders 12 to 14 can be provided, wherein dishware holder 12 can be a lower dishware holder or a lower basket, dishware holder 13 an upper dishware holder or an upper basket, and dishware holder 14 a cutlery drawer. As further shown in Fig. 1, the dishware holders 12 to 14 are arranged one above the other in the wash tub 2. Each dishware holder 12 to 14 can be selectively moved into or out of the wash tub 2. In particular, each dishware holder 12 to 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. A gravity direction g is oriented from top to bottom in the orientation shown in Fig. 2. The household dishwasher 1 is associated with a coordinate system with a depth direction or x-direction x, a height direction or y-direction y, and a width direction or z-direction z. The directions x, y, and z are each oriented perpendicular to each other. The y-direction y is vertically oriented, i.e., oriented towards the center of the earth. The x-direction x and the z-direction z are each horizontally oriented, i.e., parallel to the ground. The y-direction y runs parallel to the gravity direction g.

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. Rinsing solution and/or fresh water F can enter the pump sump 16 through the sieve system 17.

A drain 18 opens from the pump sump 16. A dehumidification pump 19 is connected to the drain 18. Using the dehumidification pump 19, contaminated cleaning solution and/or fresh water F can be pumped out via a wastewater line 20. The wastewater line 20 can be connected to a stationary drain in a building.

Furthermore, a drain 21 opens from the pump sump 16. A circulation pump 22 is connected to the drain 21. The circulation pump 22 circulates the wash liquor and/or fresh water F in the wash chamber 4. The circulation pump 22 is primarily a heating pump and can therefore also be described as such. The circulation pump 22 is designed to circulate the wash liquor and/or fresh water F. Furthermore, the circulation pump 22 is also designed to introduce heat into the wash liquor and/or the fresh water F. The circulation pump 22 can be attached to the pump sump 16. The circulation pump 22 is connected to a water diverter 23. The water diverter 23 can be integrated into the circulation pump 22. With the aid of the water diverter 23, it is possible to selectively direct the rinsing solution pumped by the circulation pump 22 and/or the fresh water F to different spray devices provided in the rinsing tank 2.

24, 25, 26 to distribute. With the help of the water diverter 23, the spray devices 24,

25, 26 may be supplied with rinsing liquor and/or fresh water F or not.

The spray devices 24, 25 can be spray arms, whereas the spray device

26 can be a roof-mounted rotating sprayer. Additionally, switchable intensive spray zones or one or more sieve cleaning nozzles (not shown) can be provided. For example, the spray device 24 is located below the dishwashing container 12 and rotates around a pivot axis.

The spray device 24 is rotatably mounted on the base 7, on the pump sump 16, on the sieve system 17, or on the circulation pump 22. The spray device 24 has spray nozzles which spray the rinse water and/or the fresh water F upwards into the dish intake 12 and downwards towards the sieve system 17, as shown in Fig. 2.

The spray device 25 can be rotatably mounted on the dishware holder 13 about a pivot axis 28. The spray device 25 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 26 can be rotatably mounted on the ceiling 8 about a pivot axis 29. The spray device 26 applies wash water and/or fresh water F to the dishware holder 14 from above in the orientation shown in Fig. 2.

The spray device 24 is connected to the circulation pump 22, and in particular to the water diverter 23, via a supply line 30. The circulation pump 22 can supply the spray device 24 with rinsing solution and/or fresh water F via the supply line 30.

The spray device 25 is connected to a supply line 31, which fluidically connects the spray device 25 to the circulation pump 22. The circulation pump 22 can supply the spray device 25 with rinsing solution and/or fresh water F via the supply line 31. The spray device 26 is connected to a supply line 32, which fluidically connects the spray device 26 to the circulation pump 22. The circulation pump 22 can supply the spray device 26 with rinsing solution and/or fresh water F via the supply line 32.

Each spray device 24, 25, 26 can have its own supply line 30, 31, 32. Alternatively, all spray devices 24, 25, 26 can have a common supply line that branches out. In particular, the supply lines 30, 31, 32 are formed by a common component, especially a common injection-molded plastic component. The supply lines 30, 31, 32 are routed along the rear wall 9 from the floor 7 towards the ceiling 8. The supply lines 30, 31, 32, or at least a portion of them, can pass through the sieve system 17.

The circulation pump 22, the spray devices 24, 25, 26 and the supply lines 30, 31, 32 together form a hydraulic circuit 33 of the household dishwasher 1. The circulation pump 22 circulates the wash liquor and/or the fresh water F in this hydraulic circuit 33. The circulation pump 22 can be part of the hydraulic circuit 33. However, this is not mandatory.

The household dishwasher 1 further comprises a control device 34. Different washing programs of the household dishwasher 1 can be executed using the control device 34. For this purpose, washing programs can be stored or saved in the control device 34. The control device 34 is preferably arranged outside the washing tub 2.

The control device 34 can be arranged in or on the door 3. Preferably, the control device 34 is provided on an upper edge of the door 3 (not shown). However, the control device 34 can also be received in the base support 15. The control device 34 can be operated or actuated by means of operating elements (not shown). The operating elements can include, for example, buttons, knobs, and/or touchscreens. These can be attached to the door 3.

The circulation pump 22 can be controlled using the control device 34. For example, the circulation pump 22 can be switched on and off using the control device 34. The control device 34 can switch and/or change the speed of the circulation pump 22. It can receive and evaluate information from the circulation pump 22, such as the speed of the circulation pump 22 and/or the motor current of the circulation pump 22. Furthermore, the control device 34 can also control the water diverter 23 to selectively switch the spray devices 24, 25, 26 on or off.

The items to be cleaned 35 are arranged in the washing container 2. These items 35 can include, for example, glasses, plates, pots, bowls, cutlery, or the like. In particular, the items 35 are held in the item holders 12, 13, 14 (not shown in Fig. 2). The items 35 can be sprayed with washing solution and/or fresh water F by means of the spray devices 24, 25, 26.

Fig. 3 shows a schematic perspective view from a top oblique angle of an embodiment of the sieve system 17 for the household dishwasher 1 described above. Fig. 4 shows a schematic perspective view from a bottom oblique angle of the sieve system 17. Fig. 5 shows a schematic top view of the sieve system 17. Fig. 6 shows a schematic perspective and partially cutaway view of the sieve system 17 along section line A-A (see Fig. 3). Fig. 7 shows a schematic sectional view of the sieve system 17 along another section line B-B (see Fig. 3). Fig. 8 shows a schematic top view of embodiments of a fine sieve 36 and a woven sieve 37 for the sieve system 17. Fig. 9 shows a schematic detail view of the fine sieve 36. Fig. 10 shows a schematic detail view of the woven sieve 37. Figs. 3 to 10 will be discussed together below.

The sieve system 17 has a sieve carrier 38 with a circular outer ring 39 and a plurality of ribs 40, only one of which is marked with a reference numeral. Each of the ribs 40 extends along a principal direction of expansion, which is oriented along a radial direction R of the sieve system 17. In the figures, only one radial direction R is marked with a reference numeral, but there can be any number of them. All radial directions R lie in a horizontal plane. Furthermore, all radial directions R point away from a central axis M of the sieve system 17. The ribs 40 fix the sieve inserts 36, 37 to the sieve carrier 38. The sieve system 17 preferably comprises at least one sieve insert 36, 37 (Figs. 8 to 10). Particularly preferably, the sieve system 17 comprises exactly two sieve inserts 36, 37. One of the sieve inserts 36, 37 is a fine sieve 36 and the other is a woven sieve 37. The fine sieve 36 has a plurality of fine sieve bores 41 with a fine sieve bore spacing 42 (Fig. 9). In Figs. 3 to 5 and 8, the fine sieve bores 41 are shown only partially. Preferably, the fine sieve 36 is made of metal. The woven sieve 37 has fibers 43 extending along two different directions D1, D2 (Fig. 10). Adjacent fibers 43 are spaced apart from each other by a mesh size 44. The mesh size 44 is selected to be smaller than the fine mesh hole spacing 42. Therefore, the woven screen 37 can also be referred to as a micro-screen. The fibers 43 are preferably made of metal. However, other fiber materials are also conceivable, such as plastic, in particular aramid, or natural fibers. The two screen inserts 36, 37 consequently have different hole spacings 42, 44. However, it is also conceivable to design each of the plurality of screen inserts 36, 37 with an identical hole spacing 42, 44. Each of the plurality of screen inserts 36, 37 has a plurality of cutouts 45 (Fig. 7), which are arranged along two different radial directions R, only one of which is provided with a reference numeral (Fig. 8). The cutouts 45 represent openings through the screen inserts 36, 37.

Each of the sieve inserts 36, 37, i.e., both the fine sieve 36 and the woven sieve 37, further comprises positioning openings 46, 47 for fixing the sieve inserts 36, 37 in an injection mold (not shown) (Fig. 8). The positioning openings 46, 47 include a positioning bore 46 with a circular cross-section. The positioning bore 46 fixes the sieve insert 36, 37 with respect to both the x-direction x and the z-direction z. The positioning openings 46, 47 also include a positioning slot 47, which has an elongated cross-section.

The positioning slot 47 fixes the sieve insert 36, 37 only with respect to the z-direction. This avoids over-constraint, a so-called double fit. In an alternative embodiment not shown, the positioning bore 46 is integrated into one of the cutouts 45.

Each of the webs 40 has an upper web part 48 and a lower web part 49, which are connected to each other within the cutouts 45 (Figs. 6 and 7). In the sectional view- In Fig. 6, the cut sieve inserts 36, 37 are shown as thick black lines. With respect to a section plane along section line BB of Fig. 3 (shown in Fig. 7), the upper part of the web 48 has a cross-sectional shape with a larger cross-sectional area than the lower part of the web 49. The upper part of the web 48 is arranged vertically above the sieve inserts 36, 37 on a top surface 50, while the lower part of the web 49 is arranged vertically below the sieve inserts 36, 37 on a bottom surface 51. In particular, the lower part of the web 49 has a lower web height 52 that is at least 1.5, 2, 3, 5, 7.5, 10, 15, or 20 times greater than the upper web height 53 of the upper part of the web 48. The webs 40 therefore exhibit an asymmetry with respect to the sieve inserts 36, 37, with a large part of the web 40 being located below the sieve inserts 36, 37. Viewed from the rinsing tank 2, only a small part of the webs 40 is visible, which on the one hand reduces the degree of soiling of the sieve system 17 and on the other hand increases the cleaning effect of the rinsing solution and/or fresh water F applied to the sieve system 17, since the rinsing solution and/or fresh water F is only slightly slowed down and/or deflected by the upper part of the web 48.

Each of the sieve inserts 36, 37 has a plurality of sieve areas 54 to 56 (Fig. 3). In the figures, the sieve areas 54 to 56 are shown only for the woven sieve 37; however, the fine sieve 36 also has analogous sieve areas 54 to 56. The sieve areas 54 to 56 are designed as a single integral component and could also be referred to as windows of the sieve inserts 36, 37. Alternatively, the sieve areas 54 to 56 could also be designed as individual sieves, meaning that each of the sieve inserts 36, 37 could also be made up of multiple parts. Preferably, each of the sieve inserts 36, 37 extends over four of the webs 40 or reaches up to them. Thus, each of the sieve inserts 36, 37 has a total of three sieve areas 54 to 56. However, other numbers of sieve areas 54 to 56 are also conceivable for each of the sieve inserts 36, 37.

The sieve holder 38 is designed to be manufactured as a plastic injection-molded part, wherein the sieve holder 38 is designed as an integral component and is designed to be injection-molded in a single plastic injection molding operation. In order to avoid or reduce distortion of the sieve system 17 during its manufacture, particularly in view of the differing cross-sectional shapes of the The multiple cutouts 45 in the form of elongated holes arranged along the webs 40 of the upper web section 48 and the lower web section 49 allow the injection-molded material of the upper web section 48 and the lower web section 49 to repeatedly bond and mix with each other. During injection molding, a repeated exchange of injection-molded material between corresponding cavities of an injection mold for the upper web section 48 and the lower web section 49 can therefore take place. Advantageously, this ensures two uniform flow fronts for the upper web section 48 and the lower web section 49 during the injection molding process, allowing the lower web section 49 and the upper web section 48 to be injected and solidified simultaneously.

The portafilter 38 further comprises at least one portafilter basket 57 to 59. Particularly preferably, the portafilter 38 comprises exactly three portafilter baskets 57 to 59. Each of the portafilter baskets 57 to 59 has a plurality of portafilter holes 60, which allow an additional flow of rinsing liquid and/or fresh water F through the filter system 17 into the pump sump 16.

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

Reference symbols used:

1 household dishwasher

2 washing containers

3 Door

4. Dishwashing area

5 swivel axes

6 Feed opening

7 Floor

8 ceiling

9 Back panel

10 side wall

11 Side wall

12-14 dish capacity

15 base carriers

16 Pump sump

17 Sieve system

18 Procedure

19 Drain pump

20 Wastewater pipe

21 Procedure

22 Circulation pump

23 Water diverter

24-26 spray device

27-29 axis of rotation

30-32 Supply line

33 Hydraulic circuit

34 Control device

35 items to be washed

36 fine sieve

37 Fabric sieve

38 portafilters

39 Outer ring

40 Bridge 41 Fine sieve bore

42 fine sieve hole spacing

43 fiber

44 mesh size

45 excerpt

46 Positioning hole

47 Positioning slot

48 Bridge top

49 Bridge lower part

50 Top

51 Subpage

52 Bridge bottom height

53 Bridge top height

54-56 sieve area

57-59 portafilter basket

60 portafilter bore

A Extraction direction

E Insertion direction

F F Rinsing liquid and/or fresh water g Gravity direction

M Central axis

R Radial direction x x-direction y y-direction z z-direction

Claims

PATENT CLAIMS 1. Sieve system (17) for a household dishwasher (1) with a portafilter (38) and at least one sieve insert (36, 37), wherein the portafilter (38) has a plurality of ribs (40) for attaching the at least one sieve insert (36, 37) to the portafilter (38), wherein each of the plurality of ribs (40) has a rib upper part (48) and a rib lower part (49) which are connected to each other within a plurality of cutouts (45) of the at least one sieve insert (36, 37), wherein the plurality of cutouts (45) are arranged along the plurality of ribs (40), and wherein each of the plurality of cutouts (45) has the form of an elongated hole. 2. Sieve system according to claim 1, wherein the sieve carrier (38) is designed as a plastic injection molded part, wherein the sieve carrier (38) is preferably designed as an integral component, and wherein the sieve carrier (38) is in particular injection molded in a single plastic injection molding process. 3. Sieve system according to claim 1 or 2, wherein the upper part of the web (48) is arranged on a top side (50) of the at least one sieve insert (36, 37) and the lower part of the web (49) is arranged on a bottom side (51) of the at least one sieve insert (36, 37), wherein the bottom side (51) is arranged on an outer side of the at least one sieve insert (36, 37) facing away from the top side (50). 4. Sieve system according to one of claims 1-3, wherein, with reference to a cross-sectional plane of the sieve system (17), the upper part (48) and the lower part (49) of a particular or the plurality of ribs (40) have different cross-sectional shapes, wherein the cross-sectional plane is oriented perpendicular to a principal direction of extension of the particular rib (40), and wherein the cross-sectional shapes preferably differ with respect to their area areas, and wherein the cross-sectional shape of the lower part (49) of the rib is preferably larger than that of the upper part (48). 5. Sieve system according to claim 4, wherein, with reference to the cross-sectional plane, a lower web height (52) of the lower web (49) is equal to or at least 1.5; 2; 3; 5; 7, 5; 10; 15; or 20 times greater than the top of the bridge (53) of the top of the bridge (48). 6. Sieve system according to one of claims 1 - 5, wherein the sieve system (17) is at least partially circular, wherein the plurality of ribs (40) preferably extend along a radial direction (R) of the sieve system (17), and wherein the sieve support (38) particularly preferably has a circular outer ring (39) which comprises the plurality of ribs (40). 7. Sieve system according to one of claims 1 - 6, wherein each of the at least one sieve insert part (36, 37) has positioning openings (46, 47) for its fixation in an injection mold. 8. Sieve system according to claim 7, wherein the positioning openings (46, 47) comprise a positioning bore (46) and a positioning elongated hole (47), wherein the positioning elongated hole (47) preferably has a cross-section in the form of an elongated hole, and wherein the positioning bore (46) particularly preferably has a circular cross-section. 9. Sieve system according to claim 7 or 8, wherein at least one of the positioning openings (46, 47) is integrated in one of the cutouts (45). 10. Sieve system according to one of claims 1 - 9 with a plurality of sieve inserts (36, 37), wherein the plurality of sieve inserts (36, 37), viewed along a central axis (M) of the sieve system (17), preferably each have the form of a circular ring segment, and wherein the sieve system (17) particularly preferably has exactly two sieve inserts (36, 37). 11. Sieve system according to claim 10, wherein the plurality of sieve inserts (36, 37) have different hole spacings (42, 44), wherein preferably one of the sieve inserts (36, 37) is a fine sieve (36) with a plurality of fine sieve bores (41) and a fine sieve hole spacing (42) and another of the sieve inserts (36, 37) is a woven sieve (37) with a mesh size (44), wherein the fine sieve hole spacing (42) preferably larger than the mesh size (44), and wherein the fine sieve (36) is particularly preferably made of metal. 12. Sieve system according to claim 11, wherein the fabric sieve (37) comprises a fabric with fibers (43), wherein the fibers (43) extend along at least two different directions (D1, D2), and wherein the fibers (43) are preferably made of metal. 13. Sieve system according to one of claims 1 - 12, wherein each sieve insert (36, 37) has a plurality of sieve areas (54 - 56), and wherein adjacent sieve areas (54 - 56) are separated from each other by means of one of the plurality of ribs (40). 14. Sieve system according to one of claims 1 - 13, wherein the portafilter (38) has at least one portafilter sieve (57 - 59), wherein the at least one portafilter sieve (57 - 59) preferably has a plurality of portafilter bores (60), and wherein the portafilter sieve (57 - 59) is particularly preferably integrally connected with the portafilter (38). 15. Household dishwasher (1) with a wash container (2) for receiving items to be washed (35), a pump sump (16) provided on the wash container (2), and a filter system (17) according to any one of claims 1-14, wherein the filter system (17) covers the pump sump (16) at least partially.