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WO2025087843A1 - Lave-vaisselle domestique - Google Patents

Lave-vaisselle domestique Download PDF

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Publication number
WO2025087843A1
WO2025087843A1 PCT/EP2024/079672 EP2024079672W WO2025087843A1 WO 2025087843 A1 WO2025087843 A1 WO 2025087843A1 EP 2024079672 W EP2024079672 W EP 2024079672W WO 2025087843 A1 WO2025087843 A1 WO 2025087843A1
Authority
WO
WIPO (PCT)
Prior art keywords
sieve
area
dirt
household dishwasher
pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2024/079672
Other languages
German (de)
English (en)
Inventor
Anton Oblinger
Bernd Heisele
Fabian LINGNER
Bernd Eisenbart
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of WO2025087843A1 publication Critical patent/WO2025087843A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4202—Water filter means or strainers
    • A47L15/4204—Flat filters
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4202—Water filter means or strainers
    • A47L15/4208—Arrangements to prevent clogging of the filters, e.g. self-cleaning
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
    • A47L15/0039—Filter cleaning phases
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
    • A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
    • A47L15/22—Rotary spraying devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4202—Water filter means or strainers
    • A47L15/4206—Tubular filters
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor

Definitions

  • the present invention relates to a household dishwasher.
  • a dishwasher has a wash tub in which washware can be accommodated.
  • Spray devices for example in the form of rotatable spray arms, can be provided in the wash tub to apply wash liquor and/or fresh water to the washware. These spray devices are part of a hydraulic circuit of the dishwasher.
  • a pump sump to which a sieve system is assigned, is arranged on the underside of the wash tub.
  • the sieve system comprises a flat sieve that covers at least part of the pump sump, and a usually cylindrical fine or micro sieve that is arranged within the pump sump.
  • a circulating pump is connected to the pump sump, which, with the aid of the sieve system, supplies filtered wash liquor and/or fresh water to the spray devices via the hydraulic circuit.
  • a drain pump is connected to the pump sump and is designed to pump contaminated wash liquor and/or fresh water out of the hydraulic circuit.
  • a sieve cleaning nozzle can be provided on one of the spray devices to clean the flat sieve.
  • the fine or micro sieve is located below the flat sieve in the pump sump and therefore cannot be cleaned automatically or only with considerable design effort.
  • a household dishwasher is provided with a washing container for receiving wash ware, a pump sump provided on the washing container, a sieve system, at least one dirt feed device, a drain pump and a A circulation pump is proposed.
  • the screening system comprises a separating screen that separates the pump sump into a raw area and a clean area, with the drain pump connected to a lower end of the raw area and the circulation pump connected to the clean area.
  • the screening system further comprises a flat screen that covers the pump sump at least in sections, and with the at least one dirt feed device configured to clean a surface of the flat screen facing the rinsing container and, in doing so, to move dirt deposited on the flat screen in a targeted manner into the raw area.
  • the targeted movement of soiling deposited on the surface sieve into the raw area is to be understood in particular as meaning that soiling deposited on a part of the surface of the surface sieve to be cleaned by the dirt feed device is moved completely into the raw area and thus neither remains in the rinsing tank nor is moved into the clean area of the pump sump.
  • the inclusion of the dirt feed device enables faster dirt separation. This results in shorter cleaning times, less cleaning agent required, better cleaning performance, and more consistent cleaning results. Because the dirt feed device moves the dirt directly into the raw area of the pump sump, excessive loading of the separating screen and/or the flat screen with dirt particles is prevented, as the dirt can be pumped directly from the raw area using the drain pump. Clogging of the separating screen and/or the flat screen with dirt particles is prevented or at least significantly reduced. Manual cleaning of the separating screen is unnecessary, or the time intervals for manual cleaning are at least significantly extended.
  • drain pump is connected to a lower end of the raw area, in particular to the lowest point of the raw area, ensures that no residual water or almost no residual water remains in the raw area.
  • the washing container is preferably cuboid-shaped.
  • the washing container can be closed by means of a pivoting door attached to the washing container.
  • a washing container can be provided with several items for washing, for example, a lower basket, an upper basket, and a cutlery drawer.
  • the items for washing can be accommodated in the items for washing, which are then subjected to washing liquor and/or fresh water via a hydraulic circuit of the household dishwasher.
  • the drain pump and the circulation pump are preferably part of the hydraulic circuit.
  • “Surface” in this case can include spraying or wetting the items for washing.
  • “Dish liquor” in this case refers to water containing an additive, such as detergent and/or rinse aid and/or dirt particles removed from the items for washing.
  • the fact that the pump sump is "provided" on the washing tank means, in particular, that the pump sump is attached or mounted to the washing tank.
  • the pump sump can be attached to a bottom of the washing tank.
  • the pump sump can be part of the bottom.
  • the pump sump can also be referred to as a pump pot.
  • the screening system is preferably multi-part and comprises the flat screen and the separating screen.
  • the flat screen and the separating screen are preferably at least partially removable from the washing tank.
  • the fact that the separating screen "separates" the pump sump into the raw area and the clean area means, in this case, in particular that the separating screen is arranged at least partially between the raw area and the clean area.
  • the bottom areas of the raw and/or clean areas are preferably formed, at least in part, by the bottom of the pump sump.
  • Both the flat screen and the separating screen are fluid-permeable, at least in sections.
  • Fluid-permeable in this context means that rinsing solution and/or water can flow through the flat screen and/or the separating screen.
  • the fluid-permeable sections of the flat screen and the separating screen each have a perforation with a plurality of openings.
  • the dirt feed device is specifically designed to clean the surface of the flat screen facing the wash tank and to transport the dirt, which may include food residue, from the flat screen in a targeted and, if possible, direct manner into the raw area of the pump sump.
  • This can be done mechanically, for example, with the aid of an automated broom, wiper, or spatula.
  • the dirt feed device can comprise a broom, a wiper and/or a spatula.
  • the dirt feed device can also be formed by one or more spray nozzles which generate spray jets in order to move the soiling into the uncleaned area. In this case, the movement or transport of the soiling takes place with the aid of a spray jet. In other words, the soiling is transported or conveyed into the uncleaned area with the aid of rinsing liquid and/or fresh water.
  • a dirt feed device is also conceivable which uses both mechanical cleaning agents and spray jets for the targeted transport of the soiling.
  • the drain pump and the circulation pump are both arranged adjacent to the pump sump and preferably mounted on the pump sump.
  • the drain pump and the circulation pump are preferably arranged and preferably mounted on the pump sump such that the pump sump is located between the drain pump and the circulation pump.
  • the raw area of the pump sump can also be referred to as the dirty area.
  • the clean area can also be referred to as the circulation area.
  • the separation screen in particular a fluid-permeable separation screen filter section of the separation screen, is arranged between the raw area and the clean area. To filter the rinse liquor and/or the fresh water, these flow partially from the raw area into the clean area through the separation screen, in particular through the separation screen filter section. Dirt particles are separated on the separation screen, in particular on the separation screen filter section, on the raw area side.
  • the flat screen can have any desired geometry.
  • the flat screen is ring-shaped or ring-segment-shaped.
  • the flat screen can also be rectangular or elliptical.
  • the screen system is preferably removable.
  • the separating screen can also be removed from the flat screen. This makes it possible, for example, to remove the separating screen from the household dishwasher without dismantling the flat screen.
  • the separating screen can be positively connected to the flat screen. A positive connection is created by the interlocking or engagement of two components. For example, the separating screen is locked to the flat screen.
  • the flat screen can be or comprise, for example, a perforated metal sheet or a metal mesh overmolded with plastic, or a plastic component. Any combination of these designs is also conceivable. bar. It can be particularly advantageous if the flat screen has sections with different perforations or filtering effects. The same applies to the separating screen.
  • the separating screen, in particular the separating screen filter section can particularly preferably be a grid-shaped or net-shaped plastic component
  • the fact that the dirt feed device is "configured" to move the soiling specifically into the uncleaned area means, in particular, that the dirt feed device moves, transports, or conveys the soiling, in particular with the aid of a fluid, in particular in the form of rinsing solution and/or fresh water, or mechanically from the surface of the flat screen on the side of the rinsing container into the uncleaned area.
  • “Mechanically” means, in this case, in particular, that the dirt feed device can be designed, for example, in the form of a broom, spatula, and/or wiper.
  • the dirt feed device can be formed by one or more spray nozzles that move or transport the soiling into the uncleaned area with the aid of one or more spray jets.
  • the at least one dirt feed device is designed according to one embodiment to clean the predominant part of the surface of the surface sieve facing the rinsing container, preferably at least 80% of the surface of the surface sieve, particularly preferably the entire surface of the surface sieve, and in doing so to move dirt deposited on the part of the surface of the surface sieve to be cleaned in a targeted manner into the raw area.
  • an inlet opening is provided through which the at least one dirt feed device moves the dirt into the raw area.
  • the inlet opening is designed and configured in such a way that even coarser dirt particles can enter the raw area through the inlet opening, in particular those dirt particles that could not pass through any of the fluid-permeable sections of the surface sieve and have consequently deposited on the surface sieve.
  • the inlet opening is provided on a raw area cover, which covers at least part of the raw area of the pump sump and, viewed along a vertical direction of the household dishwasher, extends at least partially beyond the flat screen.
  • the raw area cover can be a component of the separating screen.
  • the dirty area cover is arranged, in particular, at an angle to a plane spanned by the flat screen.
  • This plane in turn, can be spanned by a width direction and a depth direction of the household dishwasher.
  • the vertical direction is oriented perpendicular to the width direction and the depth direction.
  • the raw area cover has a perforation.
  • the perforation has a plurality of openings, which preferably fluidically connect a washing chamber enclosed by the washing container with the dirty area. This means, in particular, that washing solution and/or fresh water can flow directly into the dirty area through the openings in the perforation of the dirty area cover.
  • the raw area cover is ring-segment-shaped.
  • ring-segment-shaped means that the raw area cover, particularly in a top view of the raw area cover, is part of a ring formed by the raw area cover together with the flat screen.
  • the raw area cover can also have other geometries.
  • a coarse sieve is provided at the inlet opening.
  • the coarse screen helps keep coarse contaminants out of the raw area. Since the inlet opening is located above the flat screen, or at least at the same level as the flat screen, these coarse contaminants can be easily removed manually.
  • the at least one dirt feed device comprises at least one spray nozzle.
  • the dirt feed device can comprise multiple spray nozzles, but it is also possible to provide multiple dirt feed devices, each with one or more spray nozzles.
  • the spray nozzle can also be referred to as a screen cleaning nozzle.
  • the dirt feed device can, as previously explained, be formed, for example, with the aid of a broom, a wiper, a spatula, or another suitable mechanical device.
  • a combination with one or more mechanical devices and one or more spray nozzles is also conceivable.
  • the at least one dirt feed device is designed to generate at least one spray jet which is oriented obliquely to the surface sieve.
  • multiple dirt feed devices can also generate multiple spray jets.
  • one dirt feed device can also generate multiple spray jets.
  • the spray jet is particularly inclined Oriented toward the flat screen so that the spray jet moves the soiling specifically into the inlet opening.
  • the spray jet can also be oriented such that it moves or transports the soiling away from the bottom of the washing container onto the flat screen.
  • the spray jet is oriented, in particular, obliquely to a rotational axis about which a spray device, in particular a spray arm, is rotatably mounted.
  • the at least one dirt feed device is designed to generate at least one spray jet which is directed at least temporarily towards the inlet opening.
  • the at least one spray jet has, at least temporarily, a directional component which is oriented from an outer edge of the surface sieve towards an inner edge of the surface sieve.
  • This moves the soiling against a radial direction of the surface strainer, which is oriented from the inner edge to the outer edge.
  • the soiling can thus be conveyed from the bottom of the wash tank onto the surface strainer, which is then cleaned with the help of another spray jet or a mechanical unit by moving the soiling into the raw area of the pump sump.
  • the household dishwasher has at least one spraying device, in particular a rotatably mounted spray arm, for applying washing liquor and/or fresh water to the items to be washed, wherein the at least one dirt feed device is attached to the spraying device.
  • the dirt feed device is attached to the underside of the spray device.
  • the spray device in particular the spray arm, can rotate in one direction during operation of the household dishwasher.
  • drive nozzles can be provided, from which wash liquor and/or fresh water can flow. to rotate the spray device in the direction of rotation.
  • the spray device can also be actively driven, e.g., by an electric motor.
  • the dirt feed device is designed to convey the dirt deposited on the surface sieve in the direction of movement of the spray device.
  • this spray jet can have a directional component in the direction of the movement of the dirt feed device.
  • the spraying device is rotatable about the previously mentioned axis of rotation, e.g. mounted on the pump sump or on the screening system.
  • the arrangement of the dirt feed device on the spray device, which rotates during operation, also means that the spray jet(s) are only temporarily directed towards the inlet opening or only temporarily have a directional component from an outer edge of the surface sieve towards an inner edge of the surface sieve.
  • the surface sieve in particular together with the raw area cover, has a ring shape.
  • the surface sieve is ring-segment-shaped. This means, in particular, that the surface sieve does not form a complete ring, but only a part of a ring. Alternatively, however, the surface sieve can also have any other geometry.
  • the separating screen has a fluid-permeable separating screen filter section.
  • the separating screen filter section is preferably net-shaped or grid-shaped.
  • the rinse liquor and/or fresh water flows through the separating screen filter section from the raw area to the clean area, with dirt particles being removed at the separating screen filter section.
  • the separating sieve filter section filters the dirt particles out of the rinse water and/or the fresh water.
  • the separating screen filter section is oriented, at least in a partial area, at an angle of 45° to 90°, in particular perpendicular, to the surface screen.
  • perpendicular means an angle of 90° ⁇ 10°, preferably 90° ⁇ 5°, more preferably 90° ⁇ 3°, more preferably 90° ⁇ 1°, more preferably exactly 90°.
  • the separating screen filter section can be flat. This means, in particular, that the separating screen filter section is plate-shaped or planar. However, to increase the surface area of the separating screen filter section, the separating screen filter section can also be designed alternatively, such as wave-shaped or pleated, at least in a partial area. Other configurations are also conceivable depending on the installation space and design.
  • 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 plan view of an embodiment of a sieve system for the household dishwasher according to Fig. 1;
  • Fig. 4 shows view IV according to Fig. 3;
  • Fig. 6 shows a further schematic plan view of the screening system according to Fig. 3;
  • Fig. 7 shows a schematic plan view of an embodiment of a separating screen for the screening system according to Fig. 3;
  • Fig. 8 shows a schematic sectional view of another embodiment of a sieve system for the household dishwasher according to Fig. 1;
  • Fig. 9 shows a schematic development of an embodiment of a separation screen for the filter system according to Fig. 8.
  • Fig. 10 shows a further schematic plan view of the screening system according to Fig. 3;
  • Fig. 11 shows a schematic sectional view of the screening system according to Fig. 3;
  • Fig. 12 shows a further schematic sectional view of the screening system according to Fig. 3;
  • Fig. 13 shows a further schematic plan view of the separating sieve according to Fig. 7;
  • Fig. 14 shows a further schematic plan view of the separating sieve according to Fig. 7;
  • Fig. 15 shows a further schematic sectional view of the screening system according to Fig. 3
  • Fig. 16 shows a schematic partial sectional view of an embodiment of a bearing cone for the screening system according to Fig. 3;
  • Fig. 17 shows a further schematic plan view of the separating sieve according to Fig. 7;
  • Fig. 18 shows a schematic sectional view of the separating sieve according to the section line XVIII-XVIII of Fig. 17;
  • Fig. 19 shows a further schematic sectional view of the household dishwasher according to Fig. 1;
  • Fig. 20 shows a schematic block diagram of a method for operating the household dishwasher according to Fig. 1.
  • Fig. 1 shows a schematic perspective view of an embodiment of a household dishwasher 1.
  • the household dishwasher 1 comprises a washing container 2, which can be closed, in particular watertight, by a door 3.
  • a sealing device can be provided between the door 3 and the washing container 2.
  • the washing container 2 is preferably cuboid-shaped.
  • the washing container 2 can be arranged in a housing of the household dishwasher 1.
  • the washing container 2 and the door 3 can form a washing chamber 4 for washing dishes.
  • the door 3 is shown in its open position in Fig. 1.
  • the door 3 can be closed or opened by pivoting about a pivot axis 5 provided at a lower end of the door 3. With the help of the door 3, a loading opening 6 of the washing container 2 can be closed or opened.
  • the washing container 2 has a base 7, a ceiling 8 arranged opposite the base 7, a rear wall 9 arranged opposite the closed door 3, and two side walls 10, 11 arranged opposite one another.
  • the base 7, the ceiling 8, the rear wall 9 and the side walls 10, 11 can be made, for example, from a stainless steel sheet. Alternatively, the base 7 can be made of a plastic material.
  • the household dishwasher 1 further comprises at least one dishware receptacle 12 to 14.
  • dishware receptacle 12 can be a lower dishware receptacle or a lower basket
  • the dishware receptacle 13 can be an upper dishware receptacle or an upper basket
  • the dishware receptacle 14 can be a cutlery drawer.
  • the dishware receptacles 12 to 14 are arranged one above the other in the washing compartment 2.
  • Each dishware receptacle 12 to 14 can be selectively moved into or out of the washing compartment 2.
  • each dishware receptacle 12 to 14 can be pushed or moved into the washing compartment 2 in an insertion direction E and pulled or moved out of the washing compartment 2 in a pull-out direction A opposite to the insertion direction E.
  • Fig. 2 shows a highly schematic sectional view of the household dishwasher 1.
  • a pump sump 16 is provided at the base 7.
  • the pump sump 16 is pot-shaped and extends downward from the base 7 in the orientation of Fig. 2.
  • the pump sump 16 can be a plastic component, in particular an injection-molded plastic component.
  • a sieve system 17 comprises a surface filter or a surface sieve 18 that covers the pump sump 16 at least in sections.
  • the surface sieve 18 replaces the base 7 of the rinsing container 2 at least in sections.
  • the screening system 17 further comprises a separating filter or a separating screen 19, which is arranged at least in sections within the pump sump 16.
  • the separating screen 19 separates the pump sump 16 into a raw area 20 and a clean area 21 and can, for example, be plate-shaped.
  • Rinse liquor and/or fresh water F can enter the clean area 21 through the flat screen 18. Furthermore, rinse liquor and/or fresh water F can flow through the separating screen 19 from the raw area 20 into the clean area 21 and vice versa.
  • the raw area 20 can also be referred to as the dirty area.
  • the clean area 21 can also be referred to as the circulation area.
  • a drain 22 leads from the pump sump 16, particularly from the raw area 20.
  • a drain pump 23 is connected to the drain 22. With the help of the drain pump 23, contaminated washing solution and/or fresh water F can be pumped out via a wastewater line 24.
  • the wastewater line 24 can be connected to a stationary drain of a building.
  • an outlet 25 leads from the pump sump 16, in particular from the clean area 21.
  • a circulating pump 26 is connected to the outlet 25. With the help of the circulating pump 26, washing liquor and/or fresh water F can be circulated in the washing chamber 4.
  • the circulating pump 26 is in particular a heating pump and can therefore also be referred to as such.
  • the circulating pump 26 is designed to circulate washing liquor and/or fresh water F.
  • the circulating pump 26 is also designed to introduce heat into the washing liquor and/or the fresh water F.
  • the circulating pump 26 can be attached to the pump sump 16.
  • Both the drain pump 23 and the circulation pump 26 are preferably connected to a lower end of the raw area 20 or the clean area 21, i.e., to an area of the pump sump 16 facing away from the flat screen 18. Accordingly, the outlets 22 and 25 are each arranged in the lower half, preferably in the lower third, of the pump sump 22. In order to completely or as completely prevent the retention of residual water after pumping by the drain pump 23, the outlet 22 for the drain pump 23 can be arranged at the lowest point of the raw area 20.
  • the circulation pump 26 is in fluid connection with a water diverter 27.
  • the water diverter 27 can be integrated into the circulation pump 26. With the aid of the water diverter 27, it is possible to selectively direct the washing solution and/or the fresh water F delivered by the circulation pump 26 to different spray devices provided in the washing container 2.
  • 29, 30 can be optionally supplied with rinsing solution and/or fresh water F or not.
  • the spray devices 28, 29, 30 can be spray arms, but the spray device 30 can also be designed as a roof rotor.
  • further spray devices (not shown) can be provided, which can serve, for example, to form a preferably switchable, intensive spray zone or to assist in sieve cleaning.
  • the spray device 28 is mounted below the washware holder 12 so as to be rotatable about an axis of rotation 31 on the floor 7, on the pump sump 16, on the sieve system 17, or on the circulating pump 26.
  • the spray device 28 has spray nozzles which spray the wash liquor and/or the fresh water F, in the orientation shown in Fig. 2, upwards into the washware holder 12 and downwards towards the sieve system 17.
  • the spray device 29 can be mounted on the washware holder 13 so as to be rotatable about a rotation axis 32.
  • the spray device 29 also has spray nozzles which are designed to spray the wash liquor and/or the fresh water F downwards and/or upwards in the orientation shown in Fig. 2.
  • the spray device 30 can be mounted on the ceiling 8 so as to be rotatable about a rotation axis 33.
  • the spray device 30 applies wash liquor and/or fresh water F to the washware holder 14 from above in the orientation shown in Fig. 2.
  • the spray device 28 is fluidly connected to the circulation pump 26, in particular to the water diverter 27, by means of a supply line 34.
  • the circulation pump 26 can supply the spray device 28 with rinsing solution and/or fresh water F via the supply line 34.
  • the spray device 29 is assigned a supply line 35, which fluidically connects the spray device 29 to the circulation pump 26.
  • the circulation pump 26 can supply the spray device 29 with rinsing solution and/or fresh water F via the supply line 35.
  • the spray device 30 is assigned a supply line 36, which fluidically connects the spray device 30 to the circulation pump 26.
  • the circulation pump 26 can supply the spray device 30 with rinsing solution and/or fresh water F via the supply line 36.
  • Each spray device 28, 29, 30 can be assigned its own supply line 34, 35, 36.
  • all spray devices 28, 29, 30 can have a common supply line that branches out.
  • the supply lines 34, 35, 36 are formed by a common component, in particular a common plastic injection-molded component.
  • the supply lines 34, 35, 36 are routed along the rear wall 9 from the floor 7 toward the ceiling 8.
  • the supply lines 34, 35, 36, or at least some of the supply lines 34, 35, 36, can be routed through the sieve system 17, in particular through the flat sieve 18.
  • the circulation pump 26 preferably has a separate connection or fluid outlet for each supply line 34, 35, 36.
  • the circulation pump 26, the spray devices 28, 29, 30, and the supply lines 34, 35, 36 together form a hydraulic circuit 37 of the household dishwasher 1.
  • the circulation pump 26 circulates the wash liquor and/or the fresh water F in this hydraulic circuit 37.
  • the circulation pump 26 can be part of the hydraulic circuit 37. However, this is not mandatory.
  • the household dishwasher 1 further comprises a control device 38.
  • a control device 38 for example, different washing programs of the household dishwasher 1 can be carried out.
  • washing programs can be stored or stored in the control device 38.
  • the control device 38 is preferably arranged outside the washing container 2.
  • the control device 38 can be arranged in or on the door 3.
  • the control device 38 is provided on an upper edge of the door 3 (not shown).
  • the control device 38 can also be accommodated in the base support 15.
  • the control device 38 can be operated or actuated using operating elements (not shown).
  • the operating elements can, for example, comprise keys, buttons and/or touchscreens. These can be attached to the door 3. However, operation by an external device, such as a smartphone or tablet, via a wireless communication connection.
  • the control device 38 can be used to control the circulation pump 26.
  • the control device 38 can be used to turn the circulation pump 26 on and off and/or change its speed.
  • the control device 38 can receive and evaluate information from the circulation pump 26, such as a speed of the circulation pump 26 and/or a motor current of the circulation pump 26.
  • the control device 38 can also control the water diverter 27 to selectively switch the spray devices 28, 29, 30 on or off.
  • Dishware 39 to be cleaned is arranged in the washing container 2.
  • the dishware 39 can include, for example, glasses, plates, pots, bowls, cutlery, or the like.
  • the dishware 39 is accommodated in the dishware receptacles 12, 13, 14 not shown in Fig. 2. With the aid of the spray devices 28, 29, 30, the dishware 39 can be exposed to washing liquor and/or fresh water F.
  • FIG. 3 shows a schematic plan view of an embodiment of a screening system 17 as mentioned above.
  • Fig. 4 shows the view IV according to Fig. 3.
  • Fig. 5 shows a side view of the screening system 17. In the following, reference is made simultaneously to Figs. 3 to 5.
  • the sieve system 17 comprises a surface sieve 18, as mentioned above, which is ring-segment-shaped.
  • the surface sieve 18 has an outer edge 40, with which the surface sieve 18 can rest on the pump sump 16 and/or the bottom 7 of the rinsing container 2. Furthermore, the surface sieve 18 can be assigned an inner edge 41 facing away from the outer edge 40.
  • a central part 74 of the sieve system 17, not shown in Fig. 3, is connected to the inner edge 41.
  • the rotational axis 31 of the spray device 28 extends in the region of this central part 74.
  • the spray device 28 can be mounted, for example, on the pump sump 16.
  • the flat screen 18 has a perforation 42, which is shown only in part.
  • the perforation 42 comprises a plurality of openings 43, for example in the form of bores.
  • the openings 43 can be circular. However, the openings 43 can also rectangular, in particular square, triangular, honeycomb-shaped, or elliptical.
  • the surface sieve 18 can be made of a plastic material and/or a metallic material.
  • a radial direction R is assigned to the sieve system 17.
  • the radial direction R is oriented perpendicular to the axis of rotation 31 and away from it in the direction of the inner edge 41 of the surface sieve 18.
  • the surface sieve 18 can be constructed at least in sections to be rotationally symmetrical to the axis of rotation 31.
  • the filter system 17 further comprises a separating screen 19, as previously mentioned, which divides the pump sump 16 into the raw area 20 and the clean area 21.
  • the separating screen 19 is removable for cleaning purposes.
  • the separating screen 19 has an inlet opening 44, shown in Fig. 4.
  • the inlet opening 44 is closed with a grid-shaped coarse screen 45.
  • the coarse screen 45 is permeable to fluids.
  • the coarse screen 45 is suitable for preventing coarse dirt residues from entering the raw area 20 of the pump sump 16.
  • the separation screen 19 further comprises a raw area cover 46.
  • the raw area cover 46 is fluid-permeable.
  • the raw area cover 46 has a perforation 47 with a plurality of openings 48.
  • the perforations 42, 47 can be identical. However, this is not mandatory.
  • Fig. 3 shows the spray device 28, which is mounted on the pump housing 16 for rotation about the rotation axis 31.
  • the spray device 28 extends radially beyond the flat screen 18, viewed along the radial direction R. Facing the flat screen 18, the spray device 28 has a first dirt feed device 50, which is embodied here as a spray nozzle.
  • the first dirt feed device 50 can also be a wiper, a spatula, a broom, or the like, or can also comprise multiple spray nozzles.
  • the first dirt feed device 50 is, in particular, a fan nozzle.
  • the first dirt feed device 50 has a slot-shaped nozzle opening 51. With the aid of the nozzle opening 51, a fan-shaped spray jet 52 of rinsing solution and/or fresh water F can be generated, which is directed obliquely onto the flat screen 18.
  • the first dirt feed device 50 can also be referred to as the first screen cleaning nozzle.
  • the spray device 28 has a second dirt feed device 53, which is also designed as a spray nozzle here.
  • the second dirt feed device 53 is also a fan nozzle.
  • the second dirt feed device 53 can also be a wiper, a spatula, a broom or the like, or can again comprise several spray nozzles.
  • the second dirt feed device 53 has a slot-shaped nozzle opening 54, which is designed to generate a fan-shaped spray jet 55 of rinsing liquor and/or fresh water F.
  • the nozzle openings 51, 54 are oriented obliquely to one another, but can also be aligned parallel to one another.
  • the spray jet 55 of the second dirt feed device 53 is oriented counter to the radial direction R and obliquely to the flat sieve 18.
  • the spray jets 52, 55 of the two dirt feed devices 50 and 53 can overlap. However, this is not absolutely necessary. Instead of two dirt feed devices 50, 53, exactly one dirt feed device (not shown) can be provided. Furthermore, more than two dirt feed devices 50, 53 can also be provided.
  • the second dirt feed device 53 can also be referred to as a second screen cleaning nozzle.
  • the only decisive factor is that the number, arrangement, and design of the dirt feed device or devices are suitable for cleaning at least the majority of, preferably the entire, surface of the flat screen 18 facing the washing container 2.
  • the spray device 28 rotates in a direction of rotation D about the axis of rotation 31.
  • the direction of rotation D can be clockwise.
  • drive nozzles can be provided from which wash liquor and/or fresh water F emerges in order to set the spray device 28 in motion in the direction of rotation D.
  • the spray device 28 is recoil-driven or passively driven.
  • the spray device 28 can also be actively driven.
  • a drive element in particular in the form of an electric motor, is provided to drive the spray device 28.
  • a soiling 56 may be present on the floor 7 and/or on the surface sieve 18 and/or on the central part 74 of the sieve system 17.
  • the soiling 56 may Include food residues in solid and liquid form.
  • the spray device 28 rotates in the direction of rotation D, and the dirt feed devices 50, 53 are in operation and are subjected to rinsing liquor and/or fresh water F, so that the spray jets 52, 55 are formed. With the aid of the spray jet 55, the soiling 56 is rinsed radially away from the floor 7, counter to the radial direction R, onto the surface sieve 18.
  • the spray jet 52 rinses the soiling 56 along the direction of rotation D in the direction of the inlet opening 44, at which the coarse sieve 45 is provided.
  • the spray jet 52 rinses the soiling 56 through the coarse sieve 45 into the inlet opening 44 of the raw area 20. Particularly large portions of the soiling 56 remain attached to the coarse sieve 45 and can be removed manually.
  • the soiling 56 is then guided together with rinsing liquor and/or fresh water F through the inlet opening 44 into the raw area 20 of the pump sump 16, whereby a coarse sieve volume flow VG of rinsing liquor and/or fresh water F is formed.
  • all of the soiling 56 and all of the rinsing liquor and/or fresh water F that penetrates the pump sump 16 through the inlet opening 44 is guided into the raw area 20.
  • rinsing liquor and/or fresh water F can enter the clean area 21 through the surface sieve 18, whereby a surface sieve volume flow VL is formed.
  • the separating screen 19 has a fluid-permeable separating screen filter section 49 in the area in which it separates the raw area 20 from the clean area 21, and rinse liquor and/or fresh water F can reach the clean area 21 if they pass through the separating screen filter section 49, thereby forming a separating screen volume flow VF.
  • Rinse liquor and/or fresh water F that passes through the flat screen 18 is directed exclusively into the clean area 21.
  • the circulation pump 26 When the circulation pump 26 is running, the rinsing liquor and/or fresh water that has passed through the flat screen 18 into the clean area 21 is distributed via the water diverter 27 and the supply lines 34, 35, 36 to the spray devices 28, 29, 30. Rinsing liquor and/or fresh water from the raw area 20 also passes through the separating screen filter section 49 of the separating screen 19, initially into the clean area 21 and from there into the hydraulic circuit. However, the rinsing liquor and/or fresh water F from the raw area 20 is sensitive soiling 56 is filtered out of the rinsing liquor and/or the fresh water F with the aid of the separating sieve filter section 49. The separating sieve filter section 49 becomes clogged with components of the soiling 56. In order to clean the separating sieve filter section 49, the circulation pump 26 is switched off and the drain pump 23 is switched on.
  • the drain pump 23 now pumps rinse liquor and/or fresh water F together with the soiling 56 contained therein from the uncleaned area 20.
  • the suction force of the drain pump 23 in the uncleaned area 20 also draws rinse liquor and/or fresh water from the clean area 21 through the separating screen filter section 49 of the separating screen 19, thereby flushing the separating screen filter section 49.
  • the soiling 56 thereby detached from the separating screen filter section 49 is then pumped out with the aid of the drain pump 23.
  • Manual cleaning of the separating screen 19, in particular of the separating screen filter section 49, is thereby advantageously dispensed with.
  • the separating screen 19 is thus self-cleaning.
  • Fig. 6 shows a further schematic plan view of the filter system 17.
  • Fig. 7 shows a schematic view of the separation sieve 19.
  • the surface sieve 18 of the sieve system 17 forms a fluid-permeable surface sieve surface A1, which is shown hatched in Fig. 6.
  • the surface sieve surface A1 preferably does not represent a closed ring, but rather a ring segment, which is supplemented by the raw area cover 46, which is shown double-hatched in Fig. 6, such that the surface sieve 18 together with the raw area cover has a ring shape, or in the event that the raw area cover 46, as shown in Fig. 5, extends obliquely to the surface sieve 18, the projection of the surface sieve 18 and the raw area cover 46 from vertically above represents a closed ring.
  • the raw area cover 46 which can be part of the separation screen 19 or the flat screen 18 or can also form a separate unit, is fluid-permeable.
  • the raw area cover 46 has a perforation 47 with a plurality of openings 48. Rinse liquor and/or fresh water F passing through the perforation 47 of the raw area cover 46 is directed exclusively into the raw area 20 as part of the coarse filter volume flow VG.
  • the separating screen filter section 49 of the separating screen 19 is shown in Fig. 7.
  • the separating screen filter section 49 is fluid-permeable and has a separating screen area A2.
  • the ratio of the surface sieve area A1 to the separating sieve area A2 has a lower limit of greater than or equal to 5 to 1. Possible upper limits of the above ratio can be less than or equal to 30 to 1, 20 to 1, 15 to 1, 10 to 1, 8 to 1 or 6 to 1. The following therefore preferably applies:
  • This aforementioned ratio of the screen surfaces A1, A2 to one another allows, on the one hand, the best possible filtering effect with the highest possible volume flows of rinse liquor and/or fresh water F and, on the other hand, an increased flow through the separating screen surface A2 during operation of the drain pump 23. This simplifies and improves the cleaning of the separating screen 19.
  • FIG. 8 shows a schematic sectional view of another embodiment of a screening system 17A.
  • Fig. 9 shows a schematic development of an embodiment of a separating screen 19A for the filter system 17A.
  • the separating screen 19A of the filter system 17A is not plate-shaped or flat, but cylindrical.
  • the separating screen 19A can be constructed rotationally symmetrically to the rotation axis 31.
  • the separating screen 19A is accommodated in the pump sump 16 and separates it into the raw area 20, which is provided inside the separating screen 19A, and the clean area 21, which is provided outside the separating screen 19A.
  • the drain pump 23 is connected to the raw area 20.
  • the circulation pump 26 is connected to the clean area 21.
  • the separating screen 19A has a separating screen filter section 57 that is permeable to fluid.
  • the separating screen filter section 57 has a perforation 58 (shown in detail) with a plurality of openings 59.
  • the separating screen filter section 57 is provided at a lower end of the separating screen 19A.
  • the separating screen filter section 57 is thus arranged at an end section of the separating screen 19A facing away from the flat screen 18.
  • the separating screen filter section 57 has a height h57.
  • the separating screen 19A comprises a jacket section 60 that is not fluid-permeable.
  • the jacket section 60 directly adjoins the separating screen filter section 57.
  • the height h57 of the separating screen filter section 57 is a maximum of 25% of the height h60.
  • a coarse filter 61 adjoins the casing section 60.
  • the casing section 60 is thus arranged between the separating sieve filter section 57 and the coarse filter 61.
  • the coarse filter 61 comprises a plurality of openings 62.
  • rinsing liquor and/or fresh water F enters the clean area 21 through the flat screen 18.
  • rinsing liquor and/or fresh water F enters the raw area 20 through the coarse filter 61.
  • the rinsing liquor and/or fresh water F are then filtered by the separating screen filter section 57 when they enter the clean area 20 from the raw area 20 through the separating screen filter section 57 while the circulation pump 26 is running. In the process, the separating screen filter section 57 becomes clogged with contaminants.
  • the circulation pump 26 is switched off and the drain pump 23 is switched on. Rinse liquor and/or fresh water F then flows from the clean area 21 through the separating screen filter section 57 into the dirty area 20. This rinses the separating screen filter section 57 clean.
  • improved flow dynamics are achieved at the separating screen filter section 57, which results in improved self-cleaning of the separating screen 19A.
  • Fig. 10 shows a further schematic plan view of the filter system 17.
  • the flat screen 18 is not shown.
  • the separating screen 19 is shown, which separates the pump sump 16, at least in a partial area, into the raw area 20 and the clean area 21.
  • the pump sump 16 is shown as cylindrical, with the raw area 20 and the clean area 21 being the same size. However, the pump sump 16 can have any desired geometry.
  • the raw area 20 and the clean area 21 can be different sizes.
  • the drain pump 23 and the circulation pump 26 are arranged such that the pump sump 16 is placed between the drain pump 23 and the circulation pump 26.
  • this arrangement is not absolutely necessary.
  • the aforementioned arrangement of the pump sump 16, the drain pump 23, and the circulation pump 26 allows a flow of the wash liquor and/or the fresh water F to be oriented perpendicularly or at least approximately perpendicularly to the separation screen filter section 49, both from the raw area 20 through the separating screen filter section 49 into the clean area 21 and from the clean area 21 through the separating screen filter section 49 into the raw area 20.
  • a suction force of the drain pump 23 acts homogeneously across the previously explained separating screen surface A2 (Fig. 7).
  • a flow of the rinse liquor and/or the fresh water is designated by reference numeral 63 in Fig. 10.
  • the flow 63 is oriented perpendicular to the separating screen filter section 49 or the separating screen surface A2. This leads to the most uniform self-cleaning possible of the separating screen 19, in particular of the separating screen filter section 49, due to the high dynamics acting on the separating screen filter surface A2.
  • Figs. 11 and 12 each show a further schematic sectional view of the filter system 17.
  • Figs. 13 and 14 each show a further schematic plan view of the separating screen 19, in particular of the separating screen filter section 49 of the separating screen 19. In the following, reference is made simultaneously to Figs. 11 to 14.
  • the separating screen 19 or the separating screen filter section 49 has the task of separating the raw area 20 and the clean area 21 from one another in such a way that dirt particles 64 of a certain size remain in the raw area 20.
  • an exchange of rinsing liquor and/or fresh water F must be possible between the raw area 20 and the clean area 21 and vice versa.
  • the coarse filter volume flow VG (Fig. 5) of rinsing liquor and/or fresh water F, which flows into the raw area 20 via the inlet opening 44, must flow through the separating screen filter section 49 with a defined filter stage into the clean area 21. This exchange of rinsing liquor and/or fresh water F must be maintained even when the separating screen filter section 49 is partially closed, for example, if it is clogged with dirt particles 64.
  • the separating sieve filter section 49 has a first perforation area 65 with a first perforation 66.
  • the first perforation 66 is formed by a plurality of openings 67, which may be circular.
  • the openings 67 each have a cross-sectional area A67, shown hatched.
  • the first perforation area 65 has a height h65.
  • the separating screen filter section 49 has a second perforation area 68, which, viewed along the vertical direction y, is arranged above the first perforation area 65.
  • the second perforation area 68 has a second perforation 69.
  • the second perforation 69 is formed by a plurality of openings 70, which can be circular.
  • the openings 70 each have a cross-sectional area A70 shown hatched.
  • the cross-sectional area A70 is preferably at least as large as the cross-sectional area A67.
  • the openings 70 can have a larger diameter than the openings 67.
  • the second perforation area 68 has a height h68.
  • a total area of all openings 67 of the first perforation 66 is comparable in size to a total area of all openings 70 of the second perforation 69.
  • the total The areas of all openings 67 of the first perforation 66 and the total area of all openings 70 of the second perforation 69 should therefore not differ from each other by more than 30%, preferably by no more than 20%, more preferably by no more than 10%, particularly preferably by no more than 5%.
  • perforation areas 65, 68 can be provided.
  • the perforation areas 65, 68 can be directly adjacent to one another.
  • a perforation-free area 71 that is impermeable to fluids can be provided between the perforation areas 65, 68.
  • area 71 is not necessarily perforation-free.
  • Area 71 can also have a perforation. This perforation can have openings that are larger in diameter and/or cross-sectional area than the openings 67 of the first perforation 66 and smaller than the openings 70 of the second perforation 69.
  • the exchange of rinsing liquor and/or fresh water F takes place via the first perforation area 65.
  • the exchange of rinsing liquor and/or fresh water F also takes place, at least in part, via the second perforation area 68, and rinsing operation can be maintained without a noticeable deterioration in rinsing performance. If the second perforation area 68 were not present, the raw area 20 could overflow, and dirt particles 64 of all sizes would be fed into the hydraulic circuit 37. This would result in a noticeably poorer rinsing performance.
  • a liquid level of the rinsing liquor and/or the fresh water F in the pump sump 16 during normal operation is designated by reference numeral 72.
  • a liquid level of the rinsing liquor and/or the fresh water F in the pump sump 16 at a high dirt load is designated by reference numeral 73.
  • the liquid level 73 is higher than the liquid level 72.
  • the two liquid levels 72, 73 do not exist simultaneously, but rather show two different states resulting from two different dirt loads.
  • a non-return valve 93 is shown in Figures 11 and 12.
  • the non-return valve 93 is part of the separating screen 19 and is preferably arranged at an end section of the separating screen 19 facing away from the flat screen 18.
  • the non-return valve 93 is arranged and aligned such that during operation of the circulation pump 26, when i.e., when rinsing liquor and/or fresh water F flows from the raw area 20 into the clean area 21, the check valve 93 closes and/or is closed. In Fig. 11, the check valve 93 is shown closed. Flow through the check valve 93 is not possible during this operating state.
  • the non-return valve 93 opens or remains open.
  • the non-return valve 93 is shown open.
  • Rinse liquor and/or fresh water F can flow from the clean area 21 through the non-return valve 93 into the unclean area 20 and be pumped away by the drain pump 23.
  • This can be particularly advantageous if the separating screen filter section 49 is clogged with dirt particles 94, particularly on the side of the separating screen filter section 49 facing the clean area 21. This is because pumping out the rinse liquor and/or fresh water F can thus take place even if the separating screen filter section 49 is clogged as described above.
  • the dirt particles 94 in the clean area 21 are smaller than the dirt particles 64 in the unclean area 20.
  • the check valve 93 is arranged at an end section of the separating screen 19 facing away from the flat screen 18.
  • the check valve 93 is therefore arranged particularly close to the outlet 22 associated with the drain pump 23.
  • Fig. 15 shows another schematic sectional view of the screening system 17.
  • a central part 74 of the screening system 17 is arranged within the ring- or ring-segment-shaped surface screen 18, on which the spray device 28 is mounted so as to be rotatable about the rotation axis 31.
  • the spray device 28 can also be mounted on another component in this area, in particular on the pump sump 16.
  • the central part 74 is conical or pyramid-shaped and comprises a central filter section 75 that is permeable to fluid.
  • the central part 74 also comprises a bearing provided on the upper side of the central filter section 75 in the orientation of Fig. 15. pivot pin 76, on which the spray device 28 is rotatably mounted about the rotation axis 31. If the spray device 75 is mounted in another way, the central part 74 does not have a pivot pin 76.
  • the central part 74 and the central part filter section 75 are not accessible or only accessible to a limited extent to the spray jets 52, 55 and therefore cannot be cleaned with the spray jets 52, 55.
  • the central part filter section 75 should not become dirty on either side, i.e., on the outside facing the rinsing container 2 or on the inside facing the pump sump 16.
  • the rinsing solution and/or the fresh water F should be returned to the pump sump 16 as quickly as possible, which leads to a reduction in circulation, and has a venting function.
  • the rinsing performance should not be negatively affected.
  • the central part filter section 75 is perforated.
  • Fig. 16 shows a schematic partial sectional view of the central filter section 75.
  • the central filter section 75 has a wall 77 surrounding the rotation axis 31, with an outer side 78 and an inner side 79 facing away from the outer side 78.
  • the central filter section 75 is perforated and comprises a perforation 80 with a plurality of openings 81 that penetrate the wall 77.
  • the openings 81 can have a frustoconical geometry and taper from the inner side 79 toward the outer side 78.
  • the wall 77 is inclined at an angle of inclination ⁇ relative to the rotation axis 31.
  • the angle of inclination ⁇ can be, for example, 4° to 85°.
  • the conical or pyramidal shape of the central part 74 enables a rapid and targeted transport of rinsing liquor and/or fresh water F, in particular an acceleration of the rinsing liquor and/or fresh water F as well as a dirt transport on the outer side 78 of the wall 77 in the case of dirt particles 64 that are larger than the openings 81 of the perforation 80, as shown by an arrow 82 (Fig. 15), in the direction of the flat screen 18.
  • all dirt particles 64 that are larger than the openings 81 of the perforation 80 are specifically fed to the flat screen 18 and then transported to the inlet opening 44 (Fig. 4) by means of the dirt feed devices 50, 53. This leads to a rapid return of rinsing liquid and/or fresh water F and a rapid removal of dirt.
  • Rinse liquor and/or fresh water F flows through the central part 74 through the perforation 80 of the central filter section 75.
  • a portion of the rinse liquor and/or fresh water F also flows along the inner side 79 of the central filter section 75, actively cleaning and keeping the inner side 79 clean, although the inner side 79 could become contaminated by splash water and foam 83.
  • dirt particles 64 that are smaller than the openings 81 of the perforation 80 can be rinsed off the inner side, as indicated by arrows 84.
  • the dirt particles 64 can, for example, be carried to the inner side 79 with the foam 83, as indicated by arrows 85. This prevents contamination of the inner side 79.
  • the perforation 80 is to be selected such that all functions are maintained and not impaired by dirt particles 64 introduced into the downstream hydraulic circuit 37. This means that the flushing performance is not affected. Furthermore, the perforation 80 enables the venting of an interior space 86 enclosed by the central filter section 75 of air that could collect below it if the central filter section were closed. The venting of the interior space 86 is indicated by arrows 87, 88. As previously mentioned, the perforation 80, in particular the openings 81, are conical, so that the openings 81 have a smaller diameter on the outer side 78 than on the inner side 79.
  • Fig. 17 shows a further schematic plan view of the separating sieve 19.
  • Fig. 18 shows a schematic sectional view of the separating sieve 19 according to the section line XVI II-XVI II of Fig. 17. In the following, reference is made simultaneously to Figs. 17 and 18.
  • the separating screen filter section 49 of the separating screen 19 has a first perforation area 65 with a first perforation 67 and a second perforation area 68 with a second perforation 69.
  • the first perforation area 65 can be at least partially covered by a protective shield 89, which is connected to the area 71 of the separating screen filter section 49 by a connecting section 90.
  • the protective shield 89 is arranged at a distance a from the first perforation area 65.
  • the distance a can be, for example, 1 to 20 mm.
  • the protective shield 89 is fluid-impermeable or at least less fluid-permeable than the separating screen filter section (49).
  • the protective shield 89 is arranged within the clean area 21 of the pump sump 16.
  • the strain on the first perforation area 65 caused by dirt on the side of the drain pump 23 can be reduced during circulation operation.
  • a suction effect or a volume flow through the first perforation area 65 toward the circulation pump 26 is reduced to prevent or at least reduce the burying of dirt particles 64 in the first perforation area 65.
  • the suction effect or the volume flow through the first perforation area 65 is reduced by the protective shield 89.
  • the protective shield 89 represents a hydraulic resistance.
  • the protective shield 89 is mounted on the suction side of the circulation pump 26 in the clean area 21 and directly in front of the first perforation area 65 in order to reduce the volume flow or the flow velocity of the rinsing liquor and/or the fresh water F through the first perforation area 65.
  • the protective shield 89 thus creates a hydraulic resistance that reduces the dirt load on the separating screen filter section 49, so that the dirt particles 64 can be easily removed during the pumping process.
  • the protective shield 89 is flowed around in such a way that a the greatest possible turbulence and flow through the separating sieve filter section 49, in particular the first perforation 65, takes place in order to ensure the function of the separating sieve 19 over the service life of the household dishwasher 1.
  • Fig. 19 shows a further schematic sectional view of the household dishwasher 1.
  • Fig. 20 shows a schematic block diagram of a method for operating the household dishwasher 1. In the following, reference is made simultaneously to Figs. 19 and 20.
  • a detergent 91 is required, which is introduced into the hydraulic circuit 37 in powder, gel, or tab form via a detergent dispenser.
  • a detergent lid of the detergent dispenser When a detergent lid of the detergent dispenser is opened, the detergent 91 enters the wash chamber 4. If the detergent 91 is a tab, it either falls into a defined dissolving position, in particular into a so-called tab tray, or falls undefined into the wash chamber 4 and is dissolved there via the returning wash liquor and/or the fresh water F and effectively distributed over the wash ware 39.
  • the cleaning agent 91 particularly if it is in powder form, could be flushed into the inlet opening 44 (Fig. 4) without additional measures and pumped out of the raw area 20 with the aid of the drain pump 23, without the cleaning agent 91 being able to exert its cleaning effect.
  • the result would be a significantly reduced washing performance, since a lower concentration of cleaning enzymes would be effective on the items to be washed 39. This must be prevented by additional measures to be explained below.
  • the active dirt transport by means of the dirt feed devices 50, 53 and thus the unwanted transport of the detergent 91 into the untreated area 20 is at least partially deactivated and thus rendered ineffective.
  • the spray device 28 cannot be activated within a first time interval S1 between the opening of the detergent addition and the dissolution of the detergent 91. This means that the spray device 28 is not exposed to rinsing liquor and/or fresh water F. An unwanted transport of the detergent 91 into the untreated area 20 is thus avoided or at least significantly reduced.
  • all other spray devices 29, 30 can be active except for the spray device 28.
  • an increase in the liquid level 92 of the rinsing liquor and/or the fresh water F, or an increase in the bath volume in the rinsing chamber 4, is possible during the rinsing operation up to above the flat screen 18, so that active screen cleaning and dirt transport are no longer possible.
  • the cleaning agent 91 can thus dissolve in the rinsing liquor and/or the fresh water F and remains in the hydraulic circuit 37.
  • the aforementioned measures thus make it possible to prevent unwanted entry of the cleaner 91 into the raw area 20.
  • the effectiveness of the cleaner 91 and the flushing performance can be ensured.
  • the cleaner 91 remains safely in the hydraulic circuit 37.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Abstract

L'invention concerne un lave-vaisselle domestique (1) comprenant : un récipient de lavage (2) destiné à contenir de la vaisselle (39) ; un carter de pompe (16) disposé sur le récipient de lavage (2) ; un système d'écran (17) ; au moins un dispositif de transport de saleté (50, 53) ; une pompe à lessive (23) ; et une pompe de circulation (26), le système d'écran (17) possédant un écran diviseur (19) qui divise le carter de pompe (16) en une région non propre (20) et une région propre (21), la pompe à lessive (23) étant reliée à une extrémité inférieure de la région non propre (20), et la pompe de circulation (26) étant reliée à la région propre (21), le système d'écran (17) présentant également un écran de surface (18) qui recouvre au moins une partie du carter de pompe (16), et le ou les dispositifs de transport de saleté (50, 53) étant conçus pour nettoyer une surface de l'écran de surface (18) faisant face au récipient de lavage (2), et ce faisant déplacer des dépôts de saleté (56) accumulés sur l'écran de surface (18) dans la région non propre (20).
PCT/EP2024/079672 2023-10-23 2024-10-21 Lave-vaisselle domestique Pending WO2025087843A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023210425.3 2023-10-23
DE102023210425.3A DE102023210425A1 (de) 2023-10-23 2023-10-23 Haushalts-Geschirrspülmaschine

Publications (1)

Publication Number Publication Date
WO2025087843A1 true WO2025087843A1 (fr) 2025-05-01

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ID=93258842

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/079672 Pending WO2025087843A1 (fr) 2023-10-23 2024-10-21 Lave-vaisselle domestique

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DE (1) DE102023210425A1 (fr)
WO (1) WO2025087843A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0068974A1 (fr) * 1981-06-30 1983-01-05 Esswein S.A. Lave vaisselle à filtre de recyclage automatiquement nettoyé
GB2204482A (en) * 1987-04-08 1988-11-16 Zanussi A Spa Industrie Dishwashing machine with filter cleaning arrangement
US5700329A (en) * 1996-05-22 1997-12-23 White Consolidated Industries, Inc. Filter standpipe for dishwasher
EP2818090B1 (fr) * 2013-06-27 2016-08-17 Samsung Electronics Co., Ltd Machine à laver la vaisselle et son ensemble puisard
EP3427629B1 (fr) * 2017-07-13 2020-06-24 Miele & Cie. KG Lave-vaisselle, en particulier lave-vaisselle électroménager

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT209170Z2 (it) * 1985-11-13 1988-09-16 Zanussi Elettrodomestici Macchina lavastoviglie con filtro di ricircolo autopulente.
DE102011002989A1 (de) * 2011-01-21 2012-07-26 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine
US9655494B2 (en) * 2014-06-05 2017-05-23 Wolf Appliance, Inc. Dishwasher filtration system
DE102019211433A1 (de) * 2019-07-31 2021-02-04 BSH Hausgeräte GmbH Haushalts-Geschirrspülmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0068974A1 (fr) * 1981-06-30 1983-01-05 Esswein S.A. Lave vaisselle à filtre de recyclage automatiquement nettoyé
GB2204482A (en) * 1987-04-08 1988-11-16 Zanussi A Spa Industrie Dishwashing machine with filter cleaning arrangement
US5700329A (en) * 1996-05-22 1997-12-23 White Consolidated Industries, Inc. Filter standpipe for dishwasher
EP2818090B1 (fr) * 2013-06-27 2016-08-17 Samsung Electronics Co., Ltd Machine à laver la vaisselle et son ensemble puisard
EP3427629B1 (fr) * 2017-07-13 2020-06-24 Miele & Cie. KG Lave-vaisselle, en particulier lave-vaisselle électroménager

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