Household dishwasher

Abstract

The invention relates to a domestic dishwasher (1) having a washing chamber (2) for receiving objects (39) to be washed, a pump pit (16) arranged on the washing chamber (2), a filter system (17) having a surface filter (18) which covers the pump pit (16) at least in some regions, a drainage pump (23) and a circulation pump (26), the filter system (17) having a partition filter (19) which covers the pump pit (16) at least in some regions, the pump pit (16) is separated into an unclean area (20) and a clean area (21), the drainage pump (23) is connected to the unclean area (20) and the circulation pump (26) is connected to the clean area (21), and the separating filter (19) is provided with a separating filter filtering section (49) which can be penetrated by a fluid. The separation filter (19) has a filter section through which the flushing fluid and / or the clear water (F) can be exchanged between the unclean region (20) and the clean region (21) and in opposite directions, and wherein the separation filter (19) has a non-return valve (93) which can be opened for a volumetric flow from the clean region (21) into the unclean region (20).

Description

Technical Field

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

[0002] The dishwasher has a cleaning chamber in which items to be rinsed are contained. To supply rinsing fluid and / or clean water to the items, a spray device, for example in the form of a rotatable spray arm, can be installed in the cleaning chamber. These spray devices are part of the dishwasher's hydraulic circuit. A pump pit is arranged on the lower side of the cleaning chamber, and a filtration system is attached to the pump pit. The filtration system includes a surface filter that at least partially covers the pump pit and a mostly cylindrical fine or micro filter arranged inside the pump pit. A circulation pump is connected to the pump pit, which supplies the rinsing fluid and / or clean water filtered by the filtration system to the spray device via the hydraulic circuit. Furthermore, a drain pump is connected to the pump pit, configured to pump out contaminated rinsing fluid and / or clean water from the hydraulic circuit.

[0003] Due to the dirt load on the filtration system during the dishwasher's rinsing operation, it may be necessary to periodically clean the fine or micro filters, which may contain embedded dirt, in order to maintain good filtration and thus ensure good rinsing performance. Conversely, to clean the surface filter, according to the company's understanding, a filter cleaning nozzle can be installed on a spray device within the spray unit. However, the fine or micro filters are located below the surface filters in the pump pit and therefore cannot be, or can only be, cleaned automatically with significant structural effort. Summary of the Invention

[0004] In this context, the object of the present invention is to provide an improved household dishwasher.

[0005] Therefore, a household dishwasher is proposed, having a washing chamber for receiving items to be rinsed, a pump pit disposed on the washing chamber, a filtration system, a drain pump, and a circulation pump. Here, the filtration system has a surface filter that at least partially covers the pump pit, wherein the filtration system has a separator filter that divides the pump pit into an unclean area and a clean area, wherein the drain pump is connected to the unclean area and the circulation pump is connected to the clean area, wherein the filtration system has a separator filter section permeable by fluid, through which rinsing liquid and / or clean water can be exchanged between the unclean area and the clean area in reverse, and wherein the separator filter has a check valve that can open for volumetric flow from the clean area to the unclean area.

[0006] A separator filter or separator filter section separates unclean and clean areas, allowing contaminant particles of a certain size to remain in the unclean area. Simultaneously, flushing fluid and / or clean water can be exchanged between the unclean and clean areas, and vice versa. A coarse filter volumetric flow of flushing fluid and / or clean water flowing into the unclean area can pass through the separator filter section and flow into the clean area at a defined filtration level. This exchange of flushing fluid and / or clean water is also maintained when the separator filter section is partially closed, for example, when contaminant particles are embedded in the separator filter section.

[0007] The washing chamber is preferably rectangular in shape. The washing chamber can be closed by means of a door that pivotally stops on the washing chamber. Multiple compartments for receiving items can be provided within the washing chamber, such as a lower basket, an upper basket, and a dish drawer. Items to be washed can be contained in these compartments, and are supplied with rinsing fluid and / or clean water via a hydraulic circuit of the dishwasher. A drain pump and a circulation pump are preferably part of the hydraulic circuit. "Supply" here can include spraying or wetting the items to be washed. "Rinsing fluid" here is understood to be water containing additives, such as detergents and / or rinsing aids, and / or dirt particles detached from the items to be washed.

[0008] The term "pump pit" in the context of the cleaning chamber can be understood in particular as meaning that the pump pit is mounted or installed on the cleaning chamber. Specifically, the pump pit may be located at the bottom of the cleaning chamber. The pump pit may be part of the bottom. The pump pit may also be referred to as a pump tank. The filtration system is preferably multi-piece and includes a surface filter and a separator filter. The surface filter and the separator filter are preferably at least partially removable from the cleaning chamber. The separator filter "separates" the pump pit into unclean and clean areas. In particular, this means that the separator filter is at least partially arranged between the unclean and clean areas. Here, the bottom areas of the unclean and / or clean areas are preferably formed at least partially through the bottom of the pump pit.

[0009] Not only the surface filter but also the separator filter is at least partially permeable to fluid. "Permeable to fluid" here means that flushing fluid and / or water can flow through the surface filter and / or separator filter. The permeable sections of the surface filter and separator filter each have an opening with multiple perforations. Here, the openings of the separator filter are smaller or finer than those of the surface filter. That is, the perforations of the separator filter preferably have a smaller cross-section than those of the surface filter.

[0010] For a separator filter, any number of perforated regions can be provided, and these perforated regions can also have different perforations. The perforated regions can be directly adjacent to each other. However, optionally, a third region without perforations can be provided between the first and second perforated regions. Due to the absence of perforations in the third region, the flow velocity in the regions of the first and / or second perforated regions can be increased. This, in particular, can promote the shedding of dirt particles during drainage pump operation. The height direction is understood here as a spatial direction that is perpendicular to the ground and points away from the Earth's center on the far side.

[0011] However, the third region can also have an opening. This opening can have a perforation, the cross-section and / or diameter of which increases from the first opening region toward the second opening region. Therefore, a dynamic and continuous transition can also be achieved from normal operation (where flow passes through the first opening region) to operation (where flow passes through the second opening region).

[0012] "Having different opening portions" should be understood here as the first opening portion being formed by multiple first perforations and the second opening portion being formed by multiple second perforations, wherein the diameters and / or cross-sections of the first and second perforations are different, particularly the first perforations of the first opening portion having a larger diameter and / or a larger cross-section than the second perforations of the second opening portion. The perforations can be circular or rectangular, particularly square, triangular, honeycomb-shaped, or elliptical. For cases where the perforations in the opening portion region are not uniformly formed, the preceding conclusions relate to the average diameter and / or cross-section, respectively.

[0013] Both the drain pump and the circulation pump are arranged adjacent to and preferably mounted on the pump pit. Here, the drain pump and circulation pump are preferably arranged and mounted on the pump pit such that the pump pit is positioned between the drain pump and the circulation pump. The unclean area of ​​the pump pit can also be referred to as the contaminated area. The clean area can also be referred to as the circulation area. A separator filter, particularly a fluid-permeable section of the separator filter, is arranged between the unclean area and the clean area. To filter the rinsing fluid and / or clean water, the rinsing fluid and / or clean water partially flows from the unclean area into the clean area through the separator filter, particularly through the separator filter section. Here, contaminant particles are separated on the unclean area side of the separator filter, particularly on the separator filter section.

[0014] The surface filter can have any geometry. Preferably, the surface filter is annular or segmental. However, the surface filter can also be rectangular or elliptical. The filtration system is preferably removable. In particular, the separator filter can also be removed from the surface filter. Thus, for example, the separator filter can be removed from a household dishwasher without removing the surface filter. The separator filter can be form-fitted to the surface filter. The form-fitting connection is achieved by mutual locking or front-to-back locking of the two components. For example, the separator filter and the surface filter are locked together. The surface filter can be, for example, a perforated metal plate or a metal fabric or synthetic material component injection-molded into a synthetic material. Any combination of these embodiments is also conceivable. It is particularly advantageous for the surface filter to have sections with different openings or filtration effects. The same applies to the separator filter. The separator filter, especially the separator filter section, can preferably be a grid-shaped or mesh-shaped synthetic material component.

[0015] In another embodiment, the filter section of the separator filter is flat.

[0016] This specifically means that the filter section of the separator filter can be plate-shaped or planar. In particular, to increase the surface area of ​​the filter section, the filter section can also be designed alternatively, for example, corrugated or pleated, in at least a portion of the area. Similarly, other design options can be conceived depending on the structural space and construction.

[0017] According to another embodiment, the filter section of the separator filter is at least partially perpendicular to the surface filter orientation at an angle of 45° to 90°.

[0018] "Vertical" here should be understood as an angle of 90°±10°, preferably 90°±5°, more preferably 90°±3°, even more preferably 90°±1°, and even more preferably exactly 90°.

[0019] According to the present invention, in addition to the filter section that is permeable by fluid, the separator filter also has a check valve that is open only for volumetric flow from the clean area to the unclean area.

[0020] Here, a check valve can be understood as an opening or perforation that allows flushing fluid and / or clean water to flow only in the flow direction. Flow in the opposite direction (the cut-off direction) is not possible.

[0021] The check valve is preferably part of the separator filter. The check valve is arranged and oriented such that the flow direction is from the clean area to the unclean area. Therefore, the flushing fluid and / or clean water can only flow from the clean area to the unclean area through the check valve. During the operation of the circulation pump, the flushing fluid and / or clean water flows from the unclean area into the clean area, causing the check valve to close and / or become closed. Therefore, flow through the check valve is not possible during this operating state. This eliminates the influence of the check valve on the filtration efficiency of the separator filter section.

[0022] Conversely, when the drain pump is running, the check valve opens or remains open. Therefore, rinsing fluid and / or clean water can flow from the clean area through the check valve into the unclean area and be pumped out by the drain pump. This is particularly advantageous when dirt particles are embedded in the filter section, especially on the side of the filter section facing the clean area. This is because, as mentioned above, even if dirt particles are embedded in the filter section, rinsing fluid and / or clean water can still be pumped out. This improves the robustness of the household dishwasher.

[0023] A partitioned filter, consisting of a fluid-permeable partitioned filter section and a check valve, ensures both good and long-lasting filtration while also ensuring that flushing fluid and / or clean water are pumped out as completely as possible, thus minimizing the amount of flushing fluid and / or clean water retained in the pump sump.

[0024] According to another embodiment, the check valve is arranged on the end section of the separator filter away from the surface filter.

[0025] By placing the check valve on the end section of the separator filter opposite to the surface filter, the check valve is positioned particularly close to the outlet of the drain pump in the pump sump. Thus, during drain pump operation, the separator filter and / or a minimal area of ​​the separator filter section is affected by flow through the check valve. Therefore, even when the check valve is open, flow from the clean area to the unclean area through the area of ​​the separator filter section arranged from the check valve towards the surface filter. This ensures that even when the check valve is open, dirt particles are dislodged from the separator filter section and thus clean the separator filter. Manual cleaning of the separator filter can be omitted, or at least the intervals for manual cleaning can be significantly extended.

[0026] In order to achieve the most complete pumping out of flushing fluid and / or clean water while ensuring effective self-cleaning of the separator filter during the pumping process, it is advantageous that the check valve area of ​​the check valve has a ratio of less than or equal to 1:4 relative to the area of ​​the separator filter section.

[0027] According to another embodiment of the invention, the check valve is designed such that it is completely closed when the circulation pump is activated, and intermittently open when the circulation pump is not activated. Here, the intermittent opening can be understood as an opening within a few millimeters, which ensures that the flushing fluid and / or clean water flows toward the unclean area at the end of the pumping process, even with a minimal amount of flushing fluid and / or clean water, and can be completely pumped out from there.

[0028] Other possible implementations of a household dishwasher include combinations of features or implementations not explicitly mentioned in the preceding or following descriptions of the embodiments. Those skilled in the art can also add individual aspects as improvements or additions to the corresponding basic form of the household dishwasher.

[0029] Further advantageous designs and aspects of household dishwashers are the subject of the dependent claims and the embodiments of household dishwashers described below. Furthermore, the household dishwasher is described in more detail with reference to the accompanying drawings, according to preferred embodiments. Attached Figure Description

[0030] Figure 1 A schematic perspective view showing an embodiment of a household dishwasher; Figure 2 Showing according to Figure 1 A schematic cross-sectional view of a household dishwasher; Figure 3 Showing the use of according to Figure 1 A schematic top view of an implementation of the filtration system of a household dishwasher; Figure 4 Showing according to Figure 3 View IV; Figure 5 Showing according to Figure 3 A schematic side view of the filtration system; Figure 6 Showing according to Figure 3 Another schematic top view of the filtration system; Figure 7 Showing the use of according to Figure 3 A schematic top view of an implementation of a separation filter in a filtration system; Figure 8 Showing the use of according to Figure 1 A schematic cross-sectional view of another embodiment of the filtration system of a household dishwasher; Figure 9 Showing the use of according to Figure 8 A schematic unfolded diagram illustrating an implementation of a separator filter in a filtration system; Figure 10 Showing according to Figure 3Another schematic top view of the filtration system; Figure 11 Showing according to Figure 3 A schematic cross-sectional view of the filtration system; Figure 12 Showing according to Figure 3 Another schematic cross-sectional view of the filtration system; Figure 13 Showing according to Figure 7 Another schematic top view of the separator filter; Figure 14 Showing according to Figure 7 Another schematic top view of the separator filter; Figure 15 Showing according to Figure 3 Another schematic cross-sectional view of the filtration system; Figure 16 Showing the use of according to Figure 3 A schematic partial cross-sectional view of an embodiment of the support cone of the filtration system; Figure 17 Showing according to Figure 7 Another schematic top view of the separator filter; Figure 18 Showing according to Figure 17 A schematic cross-sectional view of the separator filter with section lines XVIII-XVIII; Figure 19 Showing according to Figure 1 Another schematic cross-sectional view of a household dishwasher; and Figure 20 Showing the method for running according to Figure 1 A schematic diagram of a method for using a household dishwasher. Detailed Implementation

[0031] In the accompanying drawings, unless otherwise specified, the same or functionally equivalent elements are given the same reference numerals.

[0032] Figure 1 A schematic perspective view of an embodiment of a household dishwasher 1 is shown. The dishwasher 1 includes a washing chamber 2, which can be sealed, particularly waterproof, through a door 3. For this purpose, a sealing device can be provided between the door 3 and the washing chamber 2. The washing chamber 2 is preferably cuboid in shape. The washing chamber 2 can be arranged within the housing of the dishwasher 1. The washing chamber 2 and the door 3 can form a rinsing space 4 for the items to be rinsed.

[0033] Door 3 Figure 1The door 3 is shown in its open position. The door 3 can be closed or opened by pivoting about a pivot axis 5 located at the lower end of the door 3. The filling opening 6 of the cleaning chamber 2 can be closed or opened by means of the door 3. The cleaning chamber 2 has a bottom 7, a cover 8 opposite to the bottom 7, a rear wall 9 opposite to the closed door 3, and two side walls 10 and 11 opposite to each other. The bottom 7, cover 8, rear wall 9, and side walls 10 and 11 can be made of, for example, stainless steel. Alternatively, the bottom 7 can be made of, for example, a synthetic material.

[0034] The household dishwasher 1 also has at least one dish receiving compartment 12 to 14. Preferably, multiple, for example, three dish receiving compartments 12 to 14 can be provided, wherein the dish receiving compartment 12 can be a lower dish receiving compartment or a lower basket, the dish receiving compartment 13 can be an upper dish receiving compartment or an upper basket, and the dish receiving compartment 14 can be a dish drawer. Figure 1 As further shown, the rinsing containers 12 to 14 are arranged vertically within the cleaning chamber 2. Each rinsing container 12 to 14 can be selectively moved into or out of the cleaning chamber 2. In particular, each rinsing container 12 to 14 can be pushed into or moved into the cleaning chamber 2 in the pushing direction E and can be pulled out or moved out of the cleaning chamber 2 in the pulling direction A in the opposite direction of the pushing direction E.

[0035] Figure 2 A schematic cross-sectional view of a household dishwasher 1 is shown.

[0036] In addition to the cleaning chamber 2, the household dishwasher 1 also includes a base carrier 15 that supports the cleaning chamber 2. The base carrier 15 is, for example, a composite material component, especially a composite material injection-molded component. The base carrier 15 is box-shaped or cuboid in shape. The direction of gravity g is... Figure 2 The orientation is from top to bottom. The household dishwasher 1 is equipped with a coordinate system having a width direction (x), a height direction (y), and a depth direction (z). The x, y, and z directions are oriented perpendicularly to each other.

[0037] Pump pit 16 is located on the bottom 7. Pump pit 16 is tank-shaped and... Figure 2 The pump pit 16 extends downward from the bottom 7. The pump pit 16 can be a synthetic material component, particularly a synthetic material injection-molded component. The filtration system 17 includes a surface filter or surface screen 18, which at least partially covers the pump pit 16. Here, the surface filter 18 at least partially replaces the bottom 7 of the cleaning chamber 2.

[0038] Furthermore, the filtration system 17 includes a partition filter or partition screen 19, which is at least partially arranged within the pump pit 16. The partition filter 19 divides the pump pit 16 into an unclean area 20 and a clean area 21, and the partition filter can be designed, for example, in a plate shape. Rinse fluid and / or clean water F can enter the clean area 21 through the surface filter 18. Additionally, rinsing fluid and / or clean water F can flow from the unclean area 20 into the clean area 21 through the partition filter 19, and vice versa. The unclean area 20 can also be referred to as the soiled area. The clean area 21 can also be referred to as the circulation area.

[0039] Outlet 22 leads out from pump pit 16, particularly from unclean area 20. Drain pump 23 is connected to outlet 22. By means of drain pump 23, contaminated flushing fluid and / or clean water F can be pumped out through wastewater line 24. Wastewater line 24 can be connected to a fixed outlet of the building.

[0040] Furthermore, outlet 25 extends from pump pit 16, particularly from clean area 21. A circulation pump 26 is connected to outlet 25. The circulation pump 26 allows the rinsing fluid and / or clean water F to circulate within the rinsing space 4. The circulation pump 26 is, in particular, a heating pump and therefore can also be referred to as a circulation pump itself. The circulation pump 26 is configured to circulate the rinsing fluid and / or clean water F. Furthermore, the circulation pump 26 is also configured to introduce heat into the rinsing fluid and / or clean water F. The circulation pump 26 can be securely fastened to pump pit 16.

[0041] Not only the drain pump 23, but also the circulation pump 26 is preferably connected to the lower end of the unclean area 20 or the clean area 21, that is, to the area of ​​the pump pit 16 away from the surface filter 18. Accordingly, outlets 22 and 25 are respectively arranged in the lower half, preferably in the lower third, of the pump pit 22. In order to completely or as completely as possible avoid residual water remaining after being pumped out by the drain pump 23, the outlet 22 of the drain pump 23 can be arranged at the lowest point of the unclean area 20.

[0042] The circulation pump 26 is fluidly connected to the water distributor 27. The water distributor 27 can be integrated into the circulation pump 26. The water distributor 27 allows the rinsing fluid and / or clean water F delivered by the circulation pump 26 to be selectively distributed to different spray devices 28, 29, and 30 disposed within the cleaning chamber 2. With the help of the water distributor 27, the spray devices 28, 29, and 30 can be selectively supplied with or not supplied with rinsing fluid and / or clean water F.

[0043] Spray devices 28, 29, and 30 can be spray arms, but spray device 30 can also be designed as a top rotating nozzle. Additional spray devices (not shown) can also be provided, for example, to construct a preferably accessible high-powered spray zone or to assist in filter cleaning. For example, spray device 28 is rotatably mounted on the bottom 7, pump pit 16, filter system 17, or circulation pump 26 about a rotation axis 31 below the rinsing container 12. Spray device 28 has nozzles that spray rinsing fluid and / or clean water F onto... Figure 2 The spray is directed upwards into the container 12 containing the object to be rinsed and downwards toward the filtration system 17.

[0044] The spray device 29 is rotatably mounted on the receiving portion 13 about a rotation axis 32. The spray device 29 also has nozzles configured to... Figure 2 The spraying device 30 sprays rinsing fluid and / or clean water F downwards and / or upwards. The spraying device 30 is rotatably mounted on the cover 8 about a rotation axis 33. The spraying device 30 is in... Figure 2 The rinsing container 14 is supplied with rinsing fluid and / or clean water F from above.

[0045] The spray device 28 is fluidly connected to the circulation pump 26, and in particular to the water distributor 27, via the inlet line 34. The circulation pump 26 can supply the spray device 28 with flushing fluid and / or clean water F via the inlet line 34.

[0046] An inlet line 35 is provided for the spray device 29, which fluidly connects the spray device 29 to the circulation pump 26. The circulation pump 26 can supply the spray device 29 with flushing fluid and / or clean water F via the inlet line 35.

[0047] An inlet line 36 is provided for the spray device 30, which fluidly connects the spray device 30 to the circulation pump 26. The circulation pump 26 can supply the spray device 30 with flushing fluid and / or clean water F via the inlet line 36.

[0048] Here, each spray unit 28, 29, 30 can be equipped with its own input lines 34, 35, 36. Alternatively, all spray units 28, 29, 30 can also share a single branch input line. In particular, input lines 34, 35, 36 are formed from common components, especially from common injection-molded components made of synthetic materials. Input lines 34, 35, 36 are guided along the rear wall portion 9 from the bottom 7 toward the cover portion 8. Here, input lines 34, 35, 36, or at least a portion thereof, can pass through the filtration system 17, especially through the surface filter 18.

[0049] Preferably, the circulation pump 26 has a separate connector or fluid outlet for each input line 34, 35, 36. The circulation pump 26, the spray devices 28, 29, 30, and the input lines 34, 35, 36 together constitute the hydraulic circuit 37 of the household dishwasher 1. The circulation pump 26 circulates the rinsing fluid and / or clean water F within this hydraulic circuit 37. The circulation pump 26 can be part of the hydraulic circuit 37; however, this is not mandatory.

[0050] The household dishwasher 1 also includes a control device 38. Different rinsing programs of the household dishwasher 1 can be executed by means of the control device 38, for example. For this purpose, the rinsing programs can be stored or saved in the control device 38. The control device 38 is preferably arranged outside the washing chamber 2.

[0051] The control device 38 can be arranged in or at the door 3. Preferably, the control device 38 is located on the upper edge of the door 3 (not shown). However, the control device 38 can also be housed in the base carrier 15. The control device 38 can be operated or manipulated by means of operating elements (not shown). These operating elements can include, for example, buttons, pushbuttons, and / or touchscreens. These operating elements can be mounted on the door 3. However, they can also be operated by external devices, such as smartphones or tablets, via wireless communication connections.

[0052] The circulation pump 26 can be operated by means of the control device 38. For example, the circulation pump 26 can be turned on and off and / or its speed can be changed by means of the control device 38. The control device 38 can receive and evaluate information from the circulation pump 26, such as the speed of the circulation pump 26 and / or the motor current of the circulation pump 26. In addition, the control device 38 can also operate the water distributor 27 to selectively turn on or off the spray devices 28, 29, 30.

[0053] The items to be cleaned and rinsed 39 are arranged in the cleaning chamber 2. The items to be rinsed 39 can include, for example, glass, plates, basins, bowls, tableware, etc. Specifically, the items to be rinsed 39 are contained in... Figure 2 The items to be rinsed are contained in sections 12, 13, and 14 (not shown). Using spray devices 28, 29, and 30, the items to be rinsed 39 can be supplied with rinsing fluid and / or clean water F.

[0054] Figure 3 A schematic top view showing an embodiment of the filtration system 17 as described above. Figure 4 Showing according to Figure 3 View IV. Figure 5 A side view of the filtration system 17 is shown. See also the following... Figures 3 to 5 .

[0055] The filtration system 17 includes a surface filter 18 as previously mentioned, which is annular in shape. The surface filter 18 has an outer edge 40, which allows it to rest against the bottom 7 of the pump pit 16 and / or the cleaning chamber 2. Furthermore, the surface filter 18 may be fitted with an inner edge 41 facing away from the outer edge 40. The filtration system 17... Figure 3 The intermediate portion 74 (not shown) is connected to the inner edge 41. The rotation axis 31 of the spray device 28 extends in the region of this intermediate portion 74. The spray device 28 can be installed, for example, at the pump pit 16.

[0056] The surface filter 18 has an opening 42, which is only partially shown. The opening 42 includes a plurality of perforations 43, for example, in the form of holes. The perforations 43 can be circular. However, the perforations 43 can also be circular or rectangular, especially square, triangular, honeycomb, or elliptical. The surface filter 18 can be made of synthetic materials and / or metallic materials. A radial direction R is provided for the filtration system 17. The radial direction R is perpendicular to the axis of rotation 31 and oriented away from the axis of rotation toward the inner edge 41 of the surface filter 18. The surface filter 18 can be constructed at least partially with respect to the axis of rotation 31.

[0057] The filtration system 17 also includes a separator filter 19 as described above, which divides the pump pit 16 into a dirty area 20 and a clean area 21. The separator filter 19 can be removed for cleaning purposes. Figure 4 The inlet 44 is shown in the diagram. The inlet 44 is closed by a mesh-shaped coarse filter 45. The coarse filter 45 is permeable to fluid. The coarse filter 45 is designed to prevent coarse dirt residue from reaching the unclean area 20 of the pump pit 16.

[0058] Furthermore, the separator filter 19 includes a dirty area cover 46. The dirty area cover 46 is permeable to fluid. For this purpose, the dirty area cover 46 has an opening 47 with a plurality of perforations 48. The openings 42 and 47 can be identical. However, this is not mandatory.

[0059] exist Figure 3 The image shows a spray device 28, which is rotatably mounted on a pump pit 16 about a rotation axis 31. Viewed along the radial direction R, the spray device 28 extends radially beyond the surface filter 18. Towards the surface filter 18, the spray device 28 has a first waste conveying device 50, which is implemented here as a nozzle. Alternatively, the first waste conveying device 50 may also be a scraper, blade, broom, or the like, or may include multiple nozzles.

[0060] The first waste conveying device 50 is specifically a fan-shaped nozzle. The first waste conveying device 50 has a slit-shaped nozzle opening 51. By means of the nozzle opening 51, a fan-shaped spray beam 52 can be generated on the rinsing liquid and / or clean water F, which is obliquely directed towards the surface filter 18. The first waste conveying device 50 can also be referred to as a first filter cleaning nozzle.

[0061] Furthermore, the spray device 28 has a second waste conveying device 53, which is also implemented as a nozzle. The second waste conveying device 53 is also a fan-shaped nozzle. Alternatively, the second waste conveying device 53 can also be a scraper, squeegee, broom, or the like, or it can also include multiple nozzles. The second waste conveying device 53 has a slit-shaped nozzle opening 54, which is configured to generate a fan-shaped spray jet 55 of rinsing fluid and / or clean water F. In the illustrated embodiment, the nozzle openings 51 and 54 are oriented obliquely to each other, but they can also be oriented parallel to each other. The spray jet 55 of the second waste conveying device 53 is oriented opposite to the radial direction R and obliquely to the surface filter 18. The spray jets 52 and 55 of the two waste conveying devices 50 or 53 can intersect. However, this is not mandatory. Instead of two waste conveying devices 50 and 53, exactly one waste conveying device (not shown) can also be provided. In addition, more than two waste conveying devices 50 and 53 can also be provided. The second waste conveying device 53 can also be referred to as the second filter cleaning nozzle. The final deciding factor is that one or more waste conveying devices are suited in number, configuration and design to clean at least the main part of the surface of the surface filter 18 facing the cleaning chamber 2, preferably the entire surface.

[0062] The function of the filtration system 17 is described below. When the household dishwasher 1 is running, the spray device 28 rotates about the rotation axis 31 in the rotation direction D. The rotation direction D can be clockwise. To drive the spray device 28, a drive nozzle can be provided, from which rinsing liquid and / or clean water F is discharged, so that the spray device 28 moves in the rotation direction D. In this case, the spray device 28 is driven in the reverse direction or passively. However, the spray device 28 can also be actively driven. In this case, a drive element, particularly a drive element in the form of an electric motor, is provided to drive the spray device 28.

[0063] Contaminant 56 can be located on the bottom 7 and / or the surface filter 18 and / or the middle part 74 of the filtration system 17. Contaminant 56 can include food residue in both solid and liquid forms. The spray device 28 rotates in the rotation direction D and the waste conveying devices 50, 53 are in operation and supplied with rinsing liquid and / or clean water F, thereby forming spray jets 52, 55. By means of the spray jet 55, contaminant 56 is rinsed radially away from the bottom 7 against the radial direction R onto the surface filter 18. However, the spray jet 52 rinses contaminant 56 towards the inlet 44 in the rotation direction D, where the coarse filter 45 is located.

[0064] The spray beam 52 washes away contaminants 56 through the coarse filter 45 into the inlet 44 of the unclean area 20. Here, a particularly large portion of the contaminants 56 remains attached to the coarse filter 45 and can be manually removed. The contaminants 56, along with the rinsing fluid and / or clean water F, are then guided through the inlet 44 into the unclean area 20 of the pump pit 16, thereby forming a coarse filter volume flow VG of the rinsing fluid and / or clean water F. In other words, all contaminants 56 and all the rinsing fluid and / or clean water F entering the pump pit 16 through the inlet 44 are introduced into the unclean area 20. Simultaneously, the rinsing fluid and / or clean water F can pass through the surface filter 18 into the clean area 21, thereby forming a surface filter volume flow VL.

[0065] There is no direct fluid connection between inlet 44 and clean area 21. However, the separator filter 19 has a fluid-permeable separator filter section 49 in the area separating the unclean area 20 from the clean area 21, and the rinsing fluid and / or clean water F can reach the clean area 21 when it passes through the separator filter section 49, thereby forming a separator filter volume flow VF. The rinsing fluid and / or clean water F passing through the surface filter 18 is only directed into the clean area 21.

[0066] When the circulating pump 26 is running, the rinsing fluid and / or clean water that reaches the clean area 21 via the surface filter 18 is distributed to the spray devices 28, 29, and 30 via the water distributor 27 and inlet lines 34, 35, and 36. However, the rinsing fluid and / or clean water also first reaches the clean area 21 from the unclean area 20 through the separator filter section 49 of the separator filter 19, and from there also reaches the hydraulic circuit. However, here, contaminants 56 in the rinsing fluid and / or clean water F located in the unclean area 20 are filtered out of the rinsing fluid and / or clean water F by means of the separator filter section 49. The separator filter section 49 is here clogged by the components of the contaminants 56. To clean the separator filter section 49, the circulating pump 26 is turned off and the drain pump 23 is turned on.

[0067] The drain pump 23 now pumps the rinsing fluid and / or clean water F, along with the contaminants 56 located therein, out of the unclean area 20. However, the suction force of the drain pump 23 in the unclean area 20 also draws the rinsing fluid and / or clean water from the clean area 21 through the separator filter section 49 of the separator filter 19, thereby rinsing the separator filter section 49. The contaminants 56 that have detached from the separator filter section 49 are then pumped out by the drain pump 23. This advantageously eliminates the need for manual cleaning of the separator filter 19, especially the separator filter section 49. Therefore, the separator filter 19 is self-cleaning.

[0068] Figure 6 Another schematic top view of the filtration system 17 is shown. Figure 7 A schematic diagram of the separator filter 19 is shown.

[0069] The surface filter 18 of the filtration system 17 forms a surface filter surface A1 that is permeable by fluid, which in Figure 6 It is shown in shaded area. Here, the surface filter surface A1 is preferably not a closed loop, but a loop segment that passes through... Figure 6 The double-shaded unclean area cover 46 supplements, such that the surface filter 18 together with the unclean area cover has an annular shape, or for the unclean area cover 46 as in Figure 5 In the case shown, the surface filter 18 extends at an angle, and the projection of the surface filter 18 and the unclean area cover 46 from the vertical above is a closed loop.

[0070] The unclean area cover 46 is fluid-permeable and can be part of the separator filter 19 or the surface filter 18, or it can form a separate unit. For this purpose, the unclean area cover 46 has an opening 47 with multiple perforations 48. The flushing fluid and / or clean water F passing through the opening 47 of the unclean area cover 46 is guided only into the unclean area 20 as part of the coarse filter volume flow VG.

[0071] exist Figure 7 The diagram specifically shows only the separator filter section 49 of the separator filter 19. The separator filter section 49 is fluid-permeable and has a separator filter surface A2.

[0072] In this context, the ratio of surface filter surface A1 to separator filter surface A2 has a lower limit greater than or equal to 5:1. The possible upper limit of this ratio can be less than or equal to 30:1, 20:1, 15:1, 10:1, 8:1, or 6:1. Therefore, the preferred ratio is: A1:A2 ≥ 5:1 In addition, the following are also applicable: A1:A2 ≤ 30:1 By using the aforementioned ratio between filter surfaces A1 and A2, it is possible to achieve the best possible filtration effect with the highest possible volumetric flow rate of the flushing liquid and / or clean water F, and to increase the flow rate through the separator filter surface A2 while the drain pump 23 is running. This simplifies and improves the cleaning of the separator filter 19.

[0073] Figure 8 A schematic cross-sectional view showing another embodiment of the filtration system 17A is shown. Figure 9 A schematic unfolded view showing an embodiment of the separator filter 19A for the filtration system 17A is shown. Reference is also made to the following... Figure 8 and Figure 9 .

[0074] Unlike the separator filter 19 of the filtration system 17, the separator filter 19A of the filtration system 17A is not plate-shaped or planar but cylindrical. The separator filter 19A can be constructed rotationally symmetrical about the axis of rotation 31. The separator filter 19A is housed in a pump pit 16, which is divided into an unclean area 20 located inside the separator filter 19A and a clean area 21 located outside the separator filter 19A. A drain pump 23 is connected to the unclean area 20. A circulation pump 26 is connected to the clean area 21.

[0075] The separator filter 19A has a separator filter section 57, which is permeable to fluid. The separator filter section 57 has an opening 58 with multiple perforations 59, as partially shown. Figure 8 and Figure 9 In this orientation, the separator filter section 57 is disposed on the lower end of the separator filter 19A. The separator filter section 57 is therefore arranged on the end section of the separator filter 19A that faces away from the surface filter 18. The separator filter section 57 has a height h57.

[0076] Furthermore, the separator filter 19A includes a sleeve section 60 that is impermeable by fluid. The sleeve section 60 is directly connected to the separator filter section 57. Together, the sleeve section 60 and the separator filter section 57 have a height h60. The height h57 of the separator filter section 57 is at most 25% of the height h60.

[0077] The coarse filter 61 is connected to the sleeve section 60. Therefore, the sleeve section 60 is arranged between the separator filter section 57 and the coarse filter 61. The coarse filter 61 includes a plurality of perforations 62.

[0078] During operation of the filtration system 17A, the rinsing fluid and / or clean water F passes through the surface filter 18 into the clean area 21. Simultaneously, the rinsing fluid and / or clean water F passes through the coarse filter 61 into the unclean area 20. When the rinsing fluid and / or clean water enter the clean area 21 from the unclean area 20 through the separator filter section 57 while the circulation pump 26 is running, the rinsing fluid and / or clean water F is filtered by the separator filter section 57. Here, the separator filter section 57 accumulates contaminants.

[0079] To clean the separator filter section 57, the circulation pump 26 is turned off and the drain pump 23 is turned on. Rinse fluid and / or clean water F then flow from the clean area 21 through the separator filter section 57 into the unclean area 20. This rinses the separator filter section 57. By keeping the separator filter section 57 as small as possible in terms of area, improved flow dynamics are achieved at the separator filter section 57, which results in improved self-cleaning of the separator filter 19A.

[0080] The advantages of the separator filter section 57 arranged on the end section of the separator filter 19A away from the surface filter 18 are shown here by means of the filtration system 17A having a columnar separator filter 19A, but it is obviously applicable to the same extent to filters with... Figures 2 to 7 Implementation of plate-shaped or surface-shaped separator filter 17.

[0081] Figure 10 Another schematic top view of the filtration system 17 is shown.

[0082] exist Figure 10 Surface filter 18 is not shown. Only the separator filter section 49 of separator filter 19 is shown, which divides pump pit 16 into unclean area 20 and clean area 21, at least in a partial area. Pump pit 16 is shown in a cylindrical shape, wherein unclean area 20 and clean area 21 are the same size. However, pump pit 16 can have any geometry. Unclean area 20 and clean area 21 can be different sizes.

[0083] Particularly preferably, the drain pump 23 and the circulation pump 26 are arranged such that the pump pit 16 is positioned between the drain pump 23 and the circulation pump 26. However, this arrangement is not mandatory. However, the aforementioned arrangement of the pump pit 16, the drain pump 23, and the circulation pump 26 allows for the flow of flushing fluid and / or clean water F not only from the unclean area 20 through the separator filter section 49 to the clean area 21, but also from the clean area 21 through the separator filter section 49 to the unclean area 20, perpendicular to or at least approximately perpendicular to the orientation of the separator filter section 49.

[0084] Specifically, in order to clean the filter section 49 of the separator filter (for which the circulation pump 26 is disconnected and the drain pump 23 is turned on), the suction force of the drain pump 23 acts evenly through the separator filter surface A2 described above. Figure 7 The flow of rinsing fluid and / or clean water in Figure 10 The figure is denoted by reference numeral 63. The flow 63 is oriented perpendicular to the filter section 49 or the filter surface A2 of the separator filter. The high dynamic force acting on the filter surface A2 of the separator filter results in the separator filter 19, especially the filter section 49, achieving the most uniform self-cleaning possible.

[0085] Figure 11 and Figure 12 Further schematic cross-sectional views of the filtration system 17 are shown. Figure 13 and 14 Further schematic top views of the separator filter 19, and especially of the separator filter section 49 of the separator filter 19, are shown. Reference is also made to the following... Figures 11 to 14 .

[0086] The purpose of the separator filter 19 or separator filter section 49 is to separate the unclean area 20 and the clean area 21 from each other, so that dirt particles 64 of a certain size are retained in the unclean area 20. Simultaneously, it must be possible to exchange rinsing fluid and / or clean water F between the unclean area 20 and the clean area 21, and vice versa. The coarse filter volumetric flow VG ( ) of the rinsing fluid and / or clean water F flowing into the unclean area 20 through inlet 44... Figure 5 The rinsing fluid and / or clean water F must flow through the separator filter section 49 into the clean area 21 at a defined filtration level. This exchange of rinsing fluid and / or clean water F must also be maintained when the separator filter section 49 is partially closed, for example, when the separator filter section is clogged with dirt particles 64.

[0087] To ensure the consistent exchange of rinsing fluid and / or clean water F between unclean area 20 and clean area 21, the separator filter section 49 has a first opening region 65 with a first opening 66. The first opening 66 is formed by a plurality of perforations 67, which can be circular. Each perforation 67 has a cross-section A67 shown in the shaded line. The first opening region 65 has a height h65.

[0088] Furthermore, the filter section 49 of the separator filter has a second opening region 68, which is positioned above the first opening region 65 when viewed along the height direction y. The second opening region 68 has a second opening 69. The second opening 69 is formed by a plurality of perforations 70, which can be circular. Each perforation 70 has a cross-section A70, shown in the shaded line. Cross-section A70 is preferably at least as large as cross-section A67. The perforations 70 can have a larger diameter than the perforations 67. The second opening region 68 has a height h68. The total area of ​​all the perforations 67 in the first opening region 66 is here approximately the same size as the total area of ​​all the perforations 70 in the second opening region 69. Therefore, the total area of ​​all the perforations 67 in the first opening region 66 and the total area of ​​all the perforations 70 in the second opening region 69 should therefore differ from each other by no more than 30%, preferably no more than 20%, more preferably no more than 10%, and particularly preferably no more than 5%.

[0089] Any number of opening regions 65 and 68 can be provided. Opening regions 65 and 68 can be directly adjacent to each other. Optionally, a non-opening region 71 can be provided between the opening regions 65 and 68, which is impermeable by fluid. However, region 71 is not necessarily non-opening. Region 71 can also have an opening. This opening can have a perforation that is larger in diameter and / or cross-section than the perforation 67 of the first opening 66 and smaller than the perforation 70 of the second opening 69.

[0090] During normal operation, the exchange of flushing fluid and / or clean water F occurs through the first opening region 65. In the event of a high dirt load or continuous blockage of the first opening region 65, the exchange of flushing fluid and / or clean water F also occurs at least partially through the second opening region 68, maintaining flushing operation without significantly deteriorating flushing performance. If the second opening region 68 were absent, the unclean area 20 might overflow, and dirt particles 64 of all sizes would be supplied to the hydraulic circuit 37. This would result in significantly worse flushing performance.

[0091] exist Figure 11 and Figure 13 In the figure, reference numeral 72 indicates the level of flushing fluid and / or clean water F in the pump pit 16 during normal operation. Figure 12 and Figure 14 In the figure, reference numeral 73 indicates the level of flushing fluid and / or clean water F in the pump pit 16 under high dirt load. Level 73 is higher than level 72. Here, the two levels 72 and 73 do not exist simultaneously, but rather show two different states, which are derived from two different dirt loads.

[0092] In addition, Figure 11 and Figure 12Check valve 93 is shown. Check valve 93 is part of the separator filter 19 and is preferably arranged on the end section of the separator filter 19 opposite to the surface filter 18. Check valve 93 is arranged and oriented such that when the circulation pump 26 is running, i.e., when the flushing fluid and / or clean water F flows from the unclean area 20 into the clean area 21, check valve 93 is closed and / or has been closed. Figure 11 In this diagram, check valve 93 is shown as closed. Flow through check valve 93 is not possible during this operating state.

[0093] Conversely, when the drain pump 23 is running, the check valve 93 is open or remains open. Figure 12 In this diagram, check valve 93 is shown as open. Rinse fluid and / or clean water F can flow from clean area 21 through check valve 93 into unclean area 20 and be pumped out by drain pump 23. This is particularly advantageous when the separator filter section 49 is clogged with contaminant particles 94, especially on the side of separator filter section 49 facing clean area 21. This is because the rinsing fluid and / or clean water F can still be pumped out even when separator filter section 49 is clogged as described above. The contaminant particles 94 in clean area 21 are smaller than the contaminant particles 64 in unclean area 20.

[0094] A check valve 93 is disposed on the end section of the separator filter 19 opposite to the surface filter 18. The check valve 93 is therefore disposed particularly close to the outlet 22 of the drain pump 23. Thus, when the drain pump 23 is running, the flow through the check valve 93 affects the minimum possible area of ​​the separator filter 19 and / or the separator filter section 49, and ensures that dirt particles 94 are removed from the separator filter section 49 and thus clean the separator filter 19, even when the check valve 93 is open.

[0095] The check valve area of ​​check valve 93 has a ratio of less than or equal to 1:4 relative to the filter section area of ​​filter section 49 of the separator filter. The check valve area is the area of ​​check valve 93 that allows flushing fluid and / or clean water F to flow through when check valve 93 is open. This allows flushing fluid and / or clean water to be completely pumped out during the pumping process while ensuring effective self-cleaning of separator filter 19.

[0096] exist Figure 11The diagram shows a check valve 93 when the circulation pump 26 is active. During this operating state, the check valve 93 is closed, and fluid cannot flow through it. To ensure that even with very small amounts of flushing fluid and / or clean water, at the end of the pumping process, the flushing fluid and / or clean water can flow towards the unclean area 20 and be completely pumped out of that area by means of the drain pump 23, the check valve 93 (not shown) can be designed such that when the circulation pump 26 is not active, the check valve is open in a gap, allowing the flushing fluid and / or clean water F to flow through the gap. A gap opening here means an opening of a few millimeters.

[0097] Figure 15 Another schematic cross-sectional view of the filtration system 17 is shown.

[0098] exist Figure 15 Pump pit 16 and separator filter 19 are not shown. A central section 74 of the filtration system 17 is arranged inside an annular or segmental surface filter 18, on which a spray device 28 is mounted in a manner rotatable about a rotation axis 31. However, the spray device 28 can also be mounted on another component in this area, particularly on pump pit 16. The central section 74 is conical or pyramidal and includes a central filter section 75 that is permeable by fluid. In the illustrated embodiment, the central section 74 also includes... Figure 15 In one orientation, a support neck 76 is provided on the upper side of the intermediate filter section 75, and the spray device 28 is rotatably mounted on this support neck about the rotation axis 31. In another mounting configuration of the spray device 75, the intermediate section 74 does not have a support neck 76.

[0099] The intermediate section 74 and the intermediate filter section 75 are either inaccessible or only accessible in a limited manner to the spray jets 52 and 55, and therefore cannot be cleaned by the spray jets 52 and 55. However, the intermediate filter section 75 should be uncontaminated on both sides, that is, not only on the outer side facing the cleaning chamber 2 but also on the inner side facing the pump pit 16. Furthermore, the flushing fluid and / or clean water F should be returned to the pump pit 16 as quickly as possible, which reduces the circulation flow and provides venting. Moreover, the flushing performance should not be adversely affected. The intermediate filter section 75 is perforated to allow for both cleaning and venting.

[0100] Figure 16 A schematic partial cross-sectional view of the intermediate filter section 75 is shown.

[0101] The intermediate filter section 75 has a wall 77 surrounding the axis of rotation 31, the wall having an outer side 78 and an inner side 79 opposite to the outer side 78. As previously described, the intermediate filter section 75 is perforated and includes an opening 80 having a plurality of perforations 81 penetrating the wall 77. The perforations 81 can have a frustoconical geometry and gradually taper from the inner side 79 toward the outer side 78. The wall 77 is inclined at an angle α relative to the axis of rotation 31. The angle α can be, for example, from 4° to 85°.

[0102] The conical or pyramidal structure of the middle section 74 enables rapid and targeted delivery of flushing fluid and / or clean water F, particularly accelerating the flow of flushing fluid and / or clean water F, and conveying dirt particles along the outer side 78 of the wall section 77, especially for dirt particles 64 larger than those in the perforations 81 of the opening section 80, as indicated by arrow 82 (see...). Figure 15 As shown, the direction is towards the surface filter 18. Therefore, all dirt particles 64 larger than the perforations 81 of the opening 80 are specifically supplied to the surface filter 18 and then transported to the inlet 44 by means of the dirt conveying devices 50, 53. Figure 4 This leads to rapid backflow of flushing fluid and / or clean water F, as well as rapid transport of waste.

[0103] Rinsing fluid and / or clean water F flows through the opening 80 of the intermediate filter section 75 into the intermediate section 74. A portion of the rinsing fluid and / or clean water F also flows along the inner side 79 of the intermediate filter section 75, thereby actively cleaning and maintaining the inner side 79, which may be contaminated by sprayed water and foam 83. Specifically, dirt particles 64 smaller than the perforations 81 of the opening 80 can be rinsed from the inner side, as indicated by arrow 84. Dirt particles 64 can be carried to the inner side 79, for example, by foam 83, as indicated by arrow 85. This thus prevents contamination of the inner side 79.

[0104] The selection of the opening 80 should ensure that all functions are preserved in the subsequent hydraulic circuit 37 and are not impaired by the introduction of contaminant particles 64. Therefore, flushing performance is not affected. Furthermore, the opening 80 allows for the venting of air from the internal space 86 surrounded by the intermediate filter section 75, which could accumulate below the intermediate filter section when it is closed. The venting of the internal space 86 is indicated by arrows 87 and 88. As described above, the opening 80, particularly the perforation 81, is tapered, such that the perforation 81 has a smaller diameter on the outer side 78 than on the inner side 79.

[0105] Figure 17 Another schematic top view of the separator filter 19 is shown. Figure 18 Showing according to Figure 17A schematic cross-sectional view of the separator filter 19 along section lines XVIII-XVIII. See also the following... Figure 17 and Figure 18 .

[0106] exist Figure 17 and Figure 18 The diagram specifically shows only the separator filter section 49 of the separator filter 19. As described above, the separator filter section 49 includes a first opening region 65 having a first opening 67 and a second opening region 68 having a second opening 69.

[0107] The first opening region 65 is at least partially covered by a protective shield 89, which is connected to region 71 of the separator filter section 49 via a connecting section 90. The protective shield 89 is arranged at a distance a from the first opening region 65. The distance a can be, for example, 1 mm to 20 mm. The protective shield 89 is impermeable to fluid, or at least less permeable to fluid than the separator filter section (49). The protective shield 89 is arranged within the clean area 21 of the pump pit 16.

[0108] By means of the protective cover 89, the filter load of the first opening region 65 caused by dirt on one side of the drain pump 23 can be reduced during circulation operation. By reducing the suction or volume flow of the first opening region 65 in the direction of the circulation pump 26, dirt particles 64 can be avoided or at least reduced from becoming embedded in the first opening region 65.

[0109] The protective cover 89 reduces the suction or volumetric flow through the first opening region 65. The protective cover 89 is a hydraulic resistance. Preferably, the protective cover 89 is installed on the suction side of the circulating pump 26 in the clean area 21 and directly in front of the first opening region 65 to reduce the volumetric flow or flow velocity of the rinsing fluid and / or clean water F through the first opening region 65.

[0110] By flowing slowly, less contaminants enter and fewer contaminant particles 64 penetrate and / or embed themselves in the first opening 66, making them easier to remove from the separator filter section 49 when the flushing fluid and / or clean water F is pumped out. Due to the reverse flow when the flushing fluid and / or clean water F is pumped out, contaminant particles 64 adhering to the separator filter section 49 are easily removed, ensuring the permeability of the separator filter section 49.

[0111] This generates hydraulic resistance through the protective cover 89, which reduces the dirt load on the filter section 49 of the separator filter, allowing for easy removal of dirt particles 64 during pumping. When the flushing fluid and / or clean water F is pumped out, the protective cover 89 is surrounded by the flow, resulting in the greatest possible turbulence and flow through the filter section 49, particularly the first opening 65, thus ensuring the function of the separator filter 19 throughout the service life of the household dishwasher 1.

[0112] Figure 19 Another schematic cross-sectional view of the household dishwasher 1 is shown. Figure 20 A schematic block diagram of a method for operating a household dishwasher 1 is shown. Reference is also made to the following... Figure 19 and Figure 20 .

[0113] To clean the object to be rinsed 39, cleaning agent 91 is required. Cleaning agent 91, in powder, gel, or tablet form, is introduced into the hydraulic circuit 37 via a cleaning agent dispenser. When the cleaning agent dispenser cap is opened, cleaning agent 91 enters the rinsing space 4. If cleaning agent 91 is a tablet, it either falls into a specific dissolution location, specifically the so-called tablet tray, or falls undirected into the rinsing space 4, where it is dissolved by the returning rinsing fluid and / or clean water F and effectively distributed on the object to be rinsed 39.

[0114] If the annular surface filter 18 and the dirt conveying devices 50, 53 described above are now installed for active cleaning of the surface filter 18, the cleaning agent 91, especially when the cleaning agent is in powder form, can be flushed into the inlet 44 without additional measures. Figure 4 The detergent 91 is pumped out of the unclean area 20 by means of the drain pump 23, and thus the detergent 91 will not be able to exert its cleaning effect. The result will be a significant reduction in rinsing performance, because the lower concentration of cleaning enzymes on the object to be rinsed 39 is effective. This is prevented by additional measures that will be described below.

[0115] When the detergent dispenser is operated, the active transport of waste by means of the waste conveying devices 50, 53, and thus the undesired transport of detergent 91 to the unclean area 20, is at least partially deactivated and thus stopped. Several feasible solutions are provided here. First, the spray device 28 cannot be operated during a first time interval S1 between the opening of the detergent dispenser and the dissolution of the detergent 91. This means that the spray device 28 is not supplied with rinsing fluid and / or clean water F. Therefore, unintentional transport of detergent 91 to the unclean area 20 is avoided or at least significantly reduced. During the dissolution of detergent 91, all other spray devices 29, 30 except for the spray device 28 can be activated.

[0116] Secondly, it is possible to supply a lower spray pressure to the spray device 28 until the cleaning agent 91 dissolves. This eliminates the rotation of the spray device 28 and thus eliminates active dirt transport. The cleaning agent 91 will therefore not be unintentionally transported into the unclean area 20.

[0117] Third, the level of the rinsing fluid and / or clean water F, or the amount of bath liquid in the rinsing space 4, may increase above the level of the surface filter 18 during the washing process, making it impossible to actively clean the filter and remove contaminants. Therefore, the cleaning agent 91 can dissolve in the rinsing fluid and / or clean water F and remain in the hydraulic circuit 37.

[0118] Fourth, dynamic waste conveying devices 50 and 53 that only activate at specific pressures can be used. During the operation of the detergent dispenser or during the dissolution of detergent 91, the spray pressure is low enough that the waste conveying devices 50 and 53 remain inactive, thus neither conveying waste nor detergent 91 to the unclean area 20. Only after detergent 91 has dissolved, during the second time interval S2, is a higher spray pressure supplied to the waste conveying devices 50 and 53, and rinsing fluid and / or clean water F sprayed. Combinations of the above possibilities can also be used.

[0119] Therefore, the above measures can prevent the cleaning agent 91 from unintentionally entering the unclean area 20. This ensures the efficiency and rinsing performance of the cleaning agent 91. The cleaning agent 91 is reliably retained in the hydraulic circuit 37.

[0120] Although the present invention has been described with reference to embodiments, the present invention is subject to various modifications.

[0121] List of reference numerals

[0122] 1. Household dishwasher

[0123] 2. Clean the cavity

[0124] 3 doors

[0125] 4. Rinse Space

[0126] 5 Pivot axis

[0127] 6. Loading opening

[0128] 7. Bottom

[0129] 8 cover

[0130] 9. Rear wall

[0131] 10 Sidewalls

[0132] 11 Sidewalls

[0133] 12. Rinseable container

[0134] 13. Rinseable container

[0135] 14. Rinseable container

[0136] 15. Basic support

[0137] 16 Pump pit

[0138] 17 Filtration System

[0139] 17A Filtration System

[0140] 18 Surface Filter

[0141] 19. Separator Filter

[0142] 19A Separator Filter

[0143] 20 Unclean areas

[0144] 21 Clean Area

[0145] 22 Exports

[0146] 23 Drainage Pump

[0147] 24 Wastewater Pipelines

[0148] 25 Exports

[0149] 26 Circulation Pump

[0150] 27 Water distributor

[0151] 28 Spraying device

[0152] 29 Spraying device

[0153] 30 Spraying device

[0154] 31. Axis of rotation

[0155] 32. Rotation axis

[0156] 33. Axis of rotation

[0157] 34 Input Pipeline

[0158] 35. Input pipeline

[0159] 36. Input pipeline

[0160] 37 Hydraulic Circuit

[0161] 38 Control device

[0162] 39. Items to be rinsed

[0163] 40 outer edge

[0164] 41 Inner edge

[0165] 42. Opening section

[0166] 43. Perforation

[0167] 44 Entrances

[0168] 45 Coarse Filter

[0169] 46. ​​Coverings for unclean areas

[0170] 47. Opening section

[0171] 48 perforations

[0172] 49. Separated filter section

[0173] 50. Dirt feed device

[0174] 51 Nozzle opening

[0175] 52 spray beams

[0176] 53. Dirt Feeding Device

[0177] 54 Nozzle opening

[0178] 55 spray beams

[0179] 56 pollutants

[0180] 57. Separated filter section

[0181] 58. Opening section

[0182] 59 piercings

[0183] 60 Sheath Section

[0184] 61 Coarse Filter

[0185] 62 perforations

[0186] 63 Flow

[0187] 64. Dirt particles

[0188] 65. Opening area

[0189] 66. Opening section

[0190] 67. Perforation

[0191] 68. Opening area

[0192] 69. Opening section

[0193] 70 perforations

[0194] Area 71

[0195] 72 liquid level

[0196] 73 Liquid Level

[0197] 74 Support cone

[0198] 75 Conical Section

[0199] 76 Support neck

[0200] 77 wall

[0201] 78 Outer side

[0202] 79 Inner side

[0203] 80 Opening section

[0204] 81 perforations

[0205] 82 arrows

[0206] 83 Foam

[0207] 84 arrows

[0208] 85 arrow

[0209] 86 Interior Space

[0210] 87 arrows

[0211] 88 arrows

[0212] 89 Protective Shield

[0213] 90 Connecting Section

[0214] 91 Cleaning Agent

[0215] 92 liquid level

[0216] 93 Check valve

[0217] 94. Dirt particles

[0218] a distance

[0219] A. Pulling direction

[0220] A1 Surface Filter

[0221] A2 Separator Filter Surface

[0222] A67 Cross Section

[0223] A70 cross section

[0224] D Rotation direction

[0225] E. Push direction

[0226] F. Rinse with solution and / or clean water

[0227] g direction of gravity

[0228] h57 height

[0229] h60 height

[0230] h65 height

[0231] h68 height

[0232] R radial direction

[0233] S1 time interval

[0234] S2 time interval

[0235] VF Separator Filter Volume Flow

[0236] VG coarse filter volumetric flow

[0237] VL surface filter volume flow

[0238] xx direction

[0239] yy direction

[0240] zz direction

[0241] α is the tilt angle.

Claims

1. A household dishwasher (1) having a washing chamber (2) for receiving items (39) to be rinsed, a pump pit (16) disposed on the washing chamber (2), a filtration system (17), a drain pump (23), and a circulation pump (26), wherein, The filtration system (17) has a surface filter (18) that at least partially covers the pump pit (16), wherein the filtration system (17) has a separator filter (19) that divides the pump pit (16) into an unclean area (20) and a clean area (21), wherein the drain pump (23) is connected to the unclean area (20) and the circulation pump (26) is connected to the clean area (21), wherein the separator filter (19) has a separator filter section (49) that is permeable by fluid, through which the exchange of flushing fluid and / or clean water (F) can be carried out and reversed between the unclean area (20) and the clean area (21), and wherein the separator filter (19) has a check valve (93) that is open for volumetric flow from the clean area (21) to the unclean area (20).

2. The household dishwasher according to claim 1, characterized in that, The check valve (93) is arranged on the end section of the separator filter (19) away from the surface filter (18).

3. The household dishwasher according to claim 1 or 2, characterized in that, The check valve (93) is part of the separator filter (19).

4. The household dishwasher according to any one of claims 1 to 3, characterized in that, The check valve area of ​​the check valve (93) has a ratio of less than or equal to 1:4 relative to the area of ​​the filter section of the filter section (49).

5. The household dishwasher according to any one of claims 1 to 4, characterized in that, The check valve (93) is designed to be completely closed when the circulation pump (26) is activated, and to be intermittently opened when the circulation pump (26) is not activated.

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