EP3400863A1 - Dispositif formant tamis pour un lave-vaisselle et lave-vaisselle - Google Patents

Dispositif formant tamis pour un lave-vaisselle et lave-vaisselle Download PDF

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Publication number
EP3400863A1
EP3400863A1 EP18171508.7A EP18171508A EP3400863A1 EP 3400863 A1 EP3400863 A1 EP 3400863A1 EP 18171508 A EP18171508 A EP 18171508A EP 3400863 A1 EP3400863 A1 EP 3400863A1
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EP
European Patent Office
Prior art keywords
cover
dishwasher
tank
washing compartment
sieve
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.)
Granted
Application number
EP18171508.7A
Other languages
German (de)
English (en)
Other versions
EP3400863B1 (fr
Inventor
Markus Arnegger
Tilman Schauwecker
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.)
Winterhalter Gastronom GmbH
Original Assignee
Winterhalter Gastronom 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=62148192&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP3400863(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Winterhalter Gastronom GmbH filed Critical Winterhalter Gastronom GmbH
Publication of EP3400863A1 publication Critical patent/EP3400863A1/fr
Application granted granted Critical
Publication of EP3400863B1 publication Critical patent/EP3400863B1/fr
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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

Definitions

  • the invention relates to a screening device for a dishwasher and a dishwasher with a screening device.
  • the dishwasher may in particular be a so-called transport dishwasher or a so-called program-controlled dishwasher.
  • a program-controlled dishwasher is to be understood as meaning a dishwasher which comprises a washing compartment in which the items to be washed are arranged, while individual washing operations and optionally drying operations take place within the washing compartment, and wherein the items to be washed substantially during the washing operation and optionally during the drying process located at a fixed location within the washing compartment.
  • program-controlled dishwashers there is no targeted movement of the items to be washed during a rinsing operation or optionally a drying operation between different positions within a rinsing room, for example specific zones or within a plurality of rinsing rooms.
  • transport dishwashers differ in that the items to be washed, for example, in a washing basket, is transported through different stations, wherein at different stations different processes, in particular rinsing and / or drying operations are performed.
  • a transport dishwasher in particular a commercial dishwasher, for example, may have a conveying path which extends transversely through the transport dishwasher from an input to an output, wherein between the input and the output one behind the other different zones, such as a pre-wash zone, a Hauptpülzone, a Nach Vietnamesezone and / or possibly one or more drying zones.
  • the rinsing medium that is to say the rinsing liquid
  • the rinsing medium is preferably introduced via nozzles into a washing compartment of the dishwasher for cleaning the dishes, it being possible for different nozzles to be present for a rinsing operation, a pre-rinsing operation and / or a rinsing operation.
  • the dirty rinse water is collected in the tank and at least partially cleaned by means of one or more cleaning or filtering devices, wherein a portion of the purified rinse water is sucked by a rinsing pump, so that it can be used again for a rinsing process, while another part of the im Tank is disposed of collected flushing medium.
  • Such a dishwasher is for example in DE 10 2011 008 491 A1 described.
  • the tank for collecting dirty rinse water below the sink.
  • the tank is separated from the washing compartment by a flat screen, which serves to retain small dishes and coarse dirt particles.
  • This surface sieve may be surrounded by a surface sheet which covers a part of the top of the tank and ensures that all rinse water from the rinsing room passes exclusively through the first sieve in the region of the tank.
  • foaming occurs in the tank of a dishwasher.
  • the foam is lighter than the dirty rinse water in the tank and therefore floats on top of it. If it comes to high foaming, so much foam can form inside the tank that this pushes from below against the flat screen and exerts a buoyant force on the flat screen. If the flat screen is held vertically in the dishwasher, such as by screwing, jamming or a relatively high weight, this may cause the foam to displace the soiled rinse water in the tank, causing the tank to drain, leading to mechanical flushing power losses even failures of machine components, such as the Spülwasserloomung lead.
  • the present invention relates to a screening device for a dishwasher, in particular a commercial dishwasher, such as a transport dishwasher or a program-controlled dishwasher.
  • the screening device according to the invention is provided and configured for insertion between a washing compartment and a tank for collecting and discharging soiled dishwashing water of the dishwasher.
  • the sieve device according to the invention comprises at least one sieve which is designed such that rinsing water is conducted from the rinsing space into the tank through the sieve, and a sieve frame carrying this at least one sieve.
  • the at least one sieve and the Screen frame realized in one piece.
  • the screen frame and the at least one screen may be separate components.
  • the sieve device has an opening for discharging foam from the tank into the washing compartment and a cover which is movably mounted on the sieve frame between a closed position in which the cover closes the opening and an opening position in which the Cover the opening at least partially releases. If foaming forms inside the tank in a dishwasher equipped with the screening device according to the invention, this foam can escape or flow out through the opening of the screening device into the washing compartment of the dishwasher after filling the free tank volume above the washing liquid. In the washing compartment, the foam is smashed, for example, by the rinse water released by the rinsing nozzles. The cover prevents coarse dirt particles or fine cutlery from entering the tank through the opening.
  • the opening or openings are preferably greater than, in particular at least 3 times, at least 5 times or at least 10 times as large as, the coarsest mesh size of the sieve or sieves of the sieve device.
  • the tank is arranged "below" the washing compartment means that the tank is arranged in the gravity direction below the washing compartment, so that flushing water automatically runs into the tank due to gravity.
  • the tank itself can have in the horizontal direction quite dimensions that extend beyond the corresponding horizontal dimensions of the washing itself, the tank can be arranged, for example, in the horizontal direction completely adjacent to the washing compartment. In another embodiment, however, it is also possible that the tank itself is in fact not arranged in the gravitational direction below the washing compartment, in which case an additional pump is provided which conveys the washing water from the washing compartment into the tank.
  • spatial terms such as horizontal or vertical may refer to the direction of gravity.
  • sieve includes both sieves in the strict sense, ie devices for separating solids according to different sizes, in particular grain sizes, as also filter devices for separating solids from liquid as well as combinations thereof.
  • a “sieve” may comprise different shapes and configurations, in particular it may be a substantially flat device, flat or curved, with openings, wherein the sieves are made of different materials, in particular metal, plastic and / or rubber of different hardnesses.
  • a "sieve” is a substantially 3-dimensional device, for example in the form of a labyrinth, which also ensures that elements of a certain size can not pass through such a 3-dimensional structure, for example a labyrinth. Again, both a screening and a filtration in the strict sense is realized.
  • the term “mesh size” is to be understood to a broad extent: is it in the “sieve” in the context of this invention, for example, a conventional, area trained element, such as a mesh, which is typically referred to as a screen covering or surface sieve , This mesh size corresponds to the size of the openings.
  • the term “mesh size” is to be understood as the maximum size of solid body elements which are still passed through the sieve.
  • the screening device comprises at least a first screen, which can be designed as a flat screen, as a screen quiver and / or screen cassette.
  • the sieve quiver preferably consists of a sieve element similar to a wire mesh, preferably with a mesh size of 5 to 20 mm, preferably 10 to 15 mm, and a wire diameter of 0.5 to 3 mm, preferably 1 to 2 mm.
  • a wire mesh of the order of 12.5 - 1.5 (mesh size 12.5 mm and wire diameter 1.5 mm) is used.
  • the screening device may preferably have a second sieve which is designed as a fine sieve, preferably with a sieve element similar to a wire mesh, which preferably has a mesh width of 0.1 mm to 2 mm, particularly preferably of 0.2 mm to 1 mm or of 0, 3 mm to 0.7 mm, wherein the wire mesh preferably has a wire diameter in the order of 0.1 mm to 0.5 mm, preferably from 0.1 mm to 0.3 mm.
  • a fine screen in the Order of magnitude 0.5-0.2 (mesh size 0.5 mm, wire diameter 0.2 mm) used.
  • the cover is movable perpendicular to a plane defined by the screen frame surface.
  • the area spanned by the screen frame extends horizontally between the washing compartment and the tank of the dishwasher in order to divide the interior of the dishwasher, on the one hand, into the washing compartment and, on the other hand, into the tank.
  • the screen frame extends substantially horizontally. From the ideal horizontal extent, the screen frame may in particular deviate in such a way that the screen frame as a whole has a slight inclination relative to the ideal horizontal plane and / or at least one channel in order to facilitate the outflow of rinsing water from the surface of the screening device in the direction of the tank.
  • the vertical mobility of the cover can be well activated by the floating foam, the foam can thus simply move the cover from the closed position in the direction of the open position.
  • the cover which preferably extends horizontally horizontally across the entire opening and this can cover at least the closed position completely, preferably also during a movement vertically, in particular upwards, from the opening hinfort in the direction of the open position, further shielding the opening with respect to vertically falling down Dishes, coarse dirt particles, etc. causes.
  • the cover in an opening position located vertically above the closed position, the cover can effect at least partial, preferably complete, shielding of the opening, in particular against falling crockery or cutlery and / or coarse dirt particles which can not pass through the coarsest and / or outermost sieve of the screening device.
  • the cover is rotatable about a pivot axis S.
  • the pivot axis S preferably extends in a horizontal direction.
  • the cover can rotate about the pivot axis to move vertically upwards.
  • the cover is preferably fixed to the pivoting axis on the screening device, preferably the screen frame.
  • the cover between the closed position and the open position is designed to be pivotable, the increase of the cover by the foam can be done weight-weight relieving and a floating away the Cover is prevented by a determination on the pivot axis.
  • the cover is rotatable by less than 90 °, in particular less than 45 °, preferably less than 30 °, more preferably less than 15 ° relative to the closed position.
  • the screening device may have an end stop.
  • the limitation of the mobility of the cover ensures that the outlet of the foam from the tank into the washing compartment, a sufficient horizontal passage area is available without releasing an equally large passage opening in the vertical direction for falling cutlery or coarse dirt particles.
  • the cover is in the closed position on the screen frame.
  • the cover may extend in the closed position above the opening, wherein preferably at least the cover, at least in the closed position, preferably completely or at least partially shields the opening.
  • the cover In the closed position, the cover extends in a horizontal plane, preferably completely, in particular at least partially, for example at least 75%, at least 80% or at least 90%, vertically above and flat above the opening of the screening device.
  • the area of the cover is preferably at least as large as the area of the opening; In particular, the cover may have a 10% to 50%, preferably 15% to 25% larger area than the area of the opening.
  • a screening device has a plurality of openings, which are separated for example by webs of the screening device, wherein a single cover can extend above a plurality of openings. If a cover expands over a plurality of openings, the above ratios may be related to the summed area of the openings.
  • the cover is movable from the closed position to the open position up to an end stop of at most 5 cm, at most 2 cm or at most 1 cm.
  • the cover is rectangular. According to a preferred embodiment, the cover is at least partially screen-like.
  • the cover can be realized in particular as a flat screen.
  • the mobile one Cover part of the screening device can realize a preferably further sieve of the screening device, so that the entire realized as a screen surface of the screening device compared to conventional screening devices despite the provision of a movable cover is not or at most slightly impaired. Accordingly, the cover can pass rinsing liquid from the washing compartment into the tank in its sieve-like area and, when a large amount of foam appears, can be moved into an open position in which the cover liberates foam from the tank into the washing compartment.
  • a rectangular design of the cover simplifies the articulation of the cover on the screen frame and allows a movement in the vertical direction or pivoting direction to one of the marginal edges of the rectangle according to which due to the rectangular shape, the formation of unnecessarily large passage cross-sections in the vertical direction are advantageously avoided.
  • the cover releases, in the open position between the cover and the screen frame, a passage area for foam extending transversely to a surface spanned by the screen frame, which is arranged closer to a peripheral edge of the screen frame.
  • the location of the passage area near one of the peripheral edges of the screen frame causes the foam passage area to be located near the side wall portions of the dishwasher where experience has shown that less dirt particles and less falling crockery or cutlery is expected than in a central dishwasher area.
  • the passage area is formed in an area which is not more than 25 cm, not more than 15 cm, not more than 10 cm or not more than 5 cm away from the peripheral edge of the screen frame.
  • the invention also relates to a dishwasher, in particular an industrial dishwashing machine, such as a transport dishwasher or a program-controlled dishwasher, comprises a washing compartment for receiving the items to be washed, such as cutlery, crockery, glasses or the like, as well as a tank for collecting and optionally discharging soiled flushing water.
  • the contaminated rinse water can be, for example, a mixture of water, alkali and in particular fine dirt particles.
  • the screening device separates the flushing chamber from the tank such that the flushing water from the flushing chamber into the tank through a sieve the flushing device must flow.
  • the sieve device has a sieve frame for depositing and / or fixing in the interior of the dishwasher.
  • the dishwasher of the dishwasher comprises an opening which may be closed or covered by a cover or released from the cover.
  • the cover is adapted to be lifted from foam in the tank of the dishwasher, in particular depending on the vertical height of the foam, from the closed position.
  • the cover is preferably dimensioned such that its weight is sufficiently low, in particular in relation to the weight of the surrounding screen frame, that a lifting force due to the amount of foam in the tank only raises the cover, but not the remaining screening device, thereby letting foam through the now released from the cover opening can escape from the tank into the washroom. It is conceivable that below the screening device, a float or the like is provided, which is associated with the cover, to facilitate the lifting of the cover by the foam.
  • the sieve frame is fixedly mounted relative to the washing compartment and / or the tank.
  • a step or one or more lugs may be provided in the interior of the dishwasher, on which the screen frame is fixed in place.
  • the dishwasher may include at least one fastener such as screws, clamps, wedges, latches or the like to fix the screen frame in an operative position. In this way, it is ensured that even large amounts of foam does not move the entire screening device but only the cover.
  • the cover is movable in the vertical direction, ie perpendicularly with respect to the dishwasher, wherein the cover is preferably rotatable about a pivot axis extending in the horizontal direction.
  • the cover releases in its open position a passage area or a passage cross section for foam, which is arranged at least for the most part at a peripheral area of the washing compartment with a low distribution of dirt particles, in particular near an inner wall of the washing compartment.
  • the distance from the passage cross-section to a nearest inner wall of the washing compartment 25 cm or less, 15 cm or less, 10 cm or less or preferably 5 cm or less.
  • the passage surface may be arranged in the washing compartment so that the wire is at least partially shielded by guide rails for crockery baskets or the like in the vertical direction.
  • the cover in its open position releases a preferably vertically extending, preferably gap-shaped, passage surface for foam, so that foam can enter the wash compartment through the passage surface transversely to the vertical direction, preferably in the direction (ie directed towards) a relative to the passage surface obvious, in particular nearest, inner wall of the washing compartment.
  • the inner wall of the washing compartment then serves to shield the passage area against the passage of coarse dirt particles and dishes.
  • Fig. 1 schematically shows a process flow diagram of a dishwasher, in particular a commercial dishwasher 1, which comprises a washing compartment 3 and a tank 5 lying substantially below the washing compartment 3.
  • a washing compartment 3 rinsing nozzles 51, 53 are shown schematically.
  • the nozzles 51, 53 are supplied via a water inlet, which can be fed from a fresh water tank 55 and / or the tank 5 below the washing compartment 3.
  • To pump 55, 57 are provided.
  • a heating coil 62, 61 is provided for heating the rinse water is at the fresh water tank 55, as well as in the tank 5, which may also be referred to as a regeneration tank.
  • the tank 5 may have a drain pump 63, can be removed through the rinse water from the tank 5 to a drain 65.
  • Fig. 2 shows a plan view of a screening device 11 according to the invention according to a first embodiment.
  • the screening device 11 is composed of a circumferential screen frame 33 for storing the screening device on a holder of the dishwasher 1, for example, by the two-sided gradation of the washing compartment 3, such as in Fig. 1 represented, can be realized.
  • On the screen frame 33 can, as in Fig. 2 shown, a first, designed as a flat screen 15 sieve be provided.
  • Such a flat screen 15 may be formed of a wire mesh of the order of 12.5 to 1.5 (mesh size 12.5 mm, wire diameter 1.5 mm) for the retention of small items to be washed and coarse dirt particles.
  • the screening device 11 according to Fig. 2 further comprises a second, designed as a sieve quiver sieve 13, which may be used in a circular opening of the firstinstitunsiebs 15.
  • the second wire 13 can be held indirectly by the screen frame 33, for example via a web, directly or by means of the first wire 15.
  • a quiver sieve can be designed, for example, as a fine sieve cylinder with a sieve element similar to a wire mesh of the order of magnitude 0.5-0.2 (mesh width 0.5 mm, wire diameter 0.2 mm).
  • the rinsing water from the tank 5 through the recirculation pump 57 via the nozzles 53 back into the washing compartment 3 and the therein to be cleaned items to be cleaned passes through the sieves 13, 15, the freed of at least coarse dirt particles rinse water (Crockery, cutlery, etc.).
  • the screening device 11 according to the invention Fig. 2 comprises a rectangular flap-like cover 31, which is held on at least one hinge 35 on the screen frame 33 and rests on the screen frame 33.
  • the inner surface of the washing compartment is completely covered with the screening device 11 in relation to the tank 5 below.
  • the surface of the sieve device 11 is made up to a small extent by the outer circumferential sieve frame 33, but largely by the surface of the flat sieve 15 and the cover 31 located next to it.
  • the cover 31 may be at least partially designed like a sieve, for example as a coarse sieve or fine sieve.
  • the cover 31 can be spent in this way in a relative to the substantially purely horizontal extension of the screen frame 33 and the associated proceedingsnsiebs 15 in a slightly raised inclination. Compared to the horizontal H, the cover 31 can be opened, for example, up to an opening angle ⁇ of about 5 ° to 10 °. In the Fig. 5 well recognizable passage opening 23 between the Cover 31 and the screen frame 33 allows foam to escape near a lateral inner wall 44 of the washing compartment 3 from the tank 5 into the washing compartment 3.
  • the cover 31 of the embodiment according to Figures 2 and 5 extends across a majority of the washing compartment 3. In this way, a small opening angle ⁇ sufficient to provide a sufficiently large through hole 23 for foam, the cover 31 at its to the pivot axis S farthest end only a few millimeters to a few centimeters raising.
  • the pivotable length of the cover 31, starting from the pivot axis S, may be as large as or greater than the width of the opening 21 in the screening device 11 that originates from the pivot axis S.
  • the cover 31 can continue in the vertical direction V even with a small pivoting, for example by the angle ⁇ , starting from the closed position completely cover the opening 21, so that no dirt particles and no dishes in the vertical direction V from the washing compartment 3 can fall into the tank 5.
  • the proximity of the passage cross section 23 to the inner wall 44 of the washing compartment 3 further ensures that the passage cross section 23 is realized in a region of the washing compartment 3, in which the expected amount of dirt particles is already very low, because little items to be washed so close to the edge 44 will be located.
  • a rail or the like in the vertical direction V may be arranged above the passage section 23, so that a further additional shielding is provided by the dishwasher 11, which prevents coarse dirt particles or fine cutlery from falling vertically into the tank 5 through the passage section 23.
  • the cover 31 may also be realized as an impermeable cover, for example made of sheet metal, which directs rinsing liquid only to the first sieve 15 and the second sieve 13 of the sieve device 11.
  • the second embodiment of a sieve device 11 according to the invention Fig. 3 is the execution according to Fig. 2 very similar.
  • the cover 31 extends according to Fig. 3 over more than half the width of the screening device 11 and leaves essentially a recess for a quiver sieve 13 (not pictured) free.
  • the construction for the quiver sieve can be surrounded by another surface sieve 15.
  • the cover 31 may also be realized as a flat screen 16.
  • FIG. Fig. 4 A further preferred embodiment of a screening device 11 according to the invention is shown in perspective in FIG Fig. 4 and in a fitted state in Fig. 6 displayed. From the previous embodiments, this differs essentially in that the pivot axis S is arranged approximately centrally in the washing compartment 3, the movable cover 31 in transverse horizontal direction only makes up a part of the half of the screening device 11.
  • the opening angle ⁇ can be between 15 and 25.

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  • Washing And Drying Of Tableware (AREA)
EP18171508.7A 2017-05-10 2018-05-09 Dispositif de filtrage pour un lave-vaisselle et lave-vaisselle Active EP3400863B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017110046.6A DE102017110046B4 (de) 2017-05-10 2017-05-10 Siebvorrichtung für eine Geschirrspülmaschine und Geschirrspülmaschine

Publications (2)

Publication Number Publication Date
EP3400863A1 true EP3400863A1 (fr) 2018-11-14
EP3400863B1 EP3400863B1 (fr) 2020-02-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP18171508.7A Active EP3400863B1 (fr) 2017-05-10 2018-05-09 Dispositif de filtrage pour un lave-vaisselle et lave-vaisselle

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EP (1) EP3400863B1 (fr)
DE (1) DE102017110046B4 (fr)
ES (1) ES2787032T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109567715A (zh) * 2019-01-07 2019-04-05 浙江外星人电器有限公司 一种洗碗机过滤装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022108024B4 (de) 2022-04-04 2024-06-13 Winterhalter Product & Technology GmbH Schmutzaustragsystem für eine Transport-Geschirrspülmaschine sowie Transport-Geschirrspülmaschine mit einem solchen Schmutzaustragsystem

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05317231A (ja) * 1992-05-15 1993-12-03 Hitachi Ltd 食器洗い乾燥機の制御方法
DE102008037321A1 (de) * 2007-08-10 2009-04-02 Lg Electronics Inc. Filteranordnung und Geschirrspülmaschine, die dieselbe aufweist
US20170086641A1 (en) * 2015-09-24 2017-03-30 Lg Electronics Inc. Dishwasher

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19750266A1 (de) * 1997-11-13 1999-05-20 Miele & Cie Verfahren zum Betrieb einer Umwälzpumpe bei einer programmgesteuerten Geschirrspülmaschine
DE102011008491A1 (de) * 2011-01-13 2012-07-19 Winterhalter Gastronom Gmbh Geschirrspülmaschine mit Reinigungsvorrichung sowie Reinigungsvorrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05317231A (ja) * 1992-05-15 1993-12-03 Hitachi Ltd 食器洗い乾燥機の制御方法
DE102008037321A1 (de) * 2007-08-10 2009-04-02 Lg Electronics Inc. Filteranordnung und Geschirrspülmaschine, die dieselbe aufweist
US20170086641A1 (en) * 2015-09-24 2017-03-30 Lg Electronics Inc. Dishwasher

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109567715A (zh) * 2019-01-07 2019-04-05 浙江外星人电器有限公司 一种洗碗机过滤装置

Also Published As

Publication number Publication date
ES2787032T3 (es) 2020-10-14
EP3400863B1 (fr) 2020-02-12
DE102017110046A1 (de) 2018-11-15
DE102017110046B4 (de) 2019-08-29

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