EP2230985B1 - Appareil ménager à circulation d'eau - Google Patents

Appareil ménager à circulation d'eau Download PDF

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Publication number
EP2230985B1
EP2230985B1 EP08861330.2A EP08861330A EP2230985B1 EP 2230985 B1 EP2230985 B1 EP 2230985B1 EP 08861330 A EP08861330 A EP 08861330A EP 2230985 B1 EP2230985 B1 EP 2230985B1
Authority
EP
European Patent Office
Prior art keywords
filter
chamber
pressure chamber
household appliance
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.)
Active
Application number
EP08861330.2A
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German (de)
English (en)
Other versions
EP2230985A1 (fr
Inventor
Egbert Classen
Helmut Jerg
Hans-Peter Nannt
Kai Paintner
Thomas Wachinger
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.)
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Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP2230985A1 publication Critical patent/EP2230985A1/fr
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Publication of EP2230985B1 publication Critical patent/EP2230985B1/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
    • A47L15/4206—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
    • A47L15/4219—Water recirculation
    • 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
    • A47L15/4225—Arrangements or adaption of recirculation or discharge pumps
    • 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
    • A47L15/4285—Water-heater arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps

Definitions

  • the invention relates to a water-conducting household appliance according to the preamble of claim 1.
  • Another dishwasher with a circulating device and a filter is for example from the US 3,949,578 A known.
  • the filter is formed as a fine mesh, annular plastic strip and arranged in a pump chamber, the pump should allow an optional promotion of liquid in both directions.
  • a dishwashing machine having a pump disposed in a sump which is intended to allow circulation of water in the sump, with both an inlet and an outlet of the pump being arranged in the sump.
  • the US Pat. No. 6,418,943 B1 discloses a dishwasher with a device for chopping coarse material.
  • the dishwasher of the US 3,129,711 has in a cavity below a water-collecting sump in the bottom of their washing a pump whose rotating impeller is externally surrounded by a fixed filter cylinder. During operation of the pump, water is forced through openings in the filter cylinder from the inside outwards into the outgoing volute (discharge nozzle) of the pump.
  • a filter system is used, which may include a coarse filter, a fine sieve and a micro sieve.
  • the coarse screen is used to retain dirt particles that can lead to a blockage of the drain pump.
  • a fine sieve particles with a particle size greater than approx. 1 mm are retained and with a micro sieve particles with a particle size greater than approx. 0.15 mm are retained.
  • a water-conducting household appliance such. a dishwashing machine has a drain pump, with which at the end of a wash cycle soiled wash liquor can be conveyed out of the dishwasher into a house-side wastewater disposal system.
  • lye pumps are designed so that they can promote larger particle sizes unhindered and there is no blockage of the drain pump. Therefore, lye pumps are arranged in such a way that polluted rinsing liquor is only roughly filtered during pumping.
  • a dishwasher has a circulation pump with which rinsing liquor can be circulated during a cleaning operation, ie, in the sump of a dishwasher collecting liquid is supplied by the circulation pump by a hydraulic system in the interior of the Spül organizations arranged spray arms, with which a uniform loading of the dishes with Rinsing carried out.
  • the spray arms have relatively small openings, so it is necessary to guide the circulated rinsing liquor through the fine and micro sieve, so that even the smallest particles are retained and the outlet openings of the spray arms can not clog.
  • the circulation pump is designed with respect to the particle size tolerance.
  • the object of the invention is to provide a water-conducting domestic appliance, in particular a dishwasher or washing machine, whose filters have an increased reliability.
  • the invention is based on a water-conducting domestic appliance, in particular dishwashing or washing machine, with a hydraulic circuit in which rinsing liquid can be recirculated and in which at least one additional filter is provided for filtering circulated rinsing liquor.
  • the solution according to the invention is characterized in that at least one additional filter for filtering circulated rinsing liquor is provided in the hydraulic circuit, which is arranged in a region of the hydraulic circuit in which recirculated rinsing fluid has a rotation.
  • the rotation of the circulating rinsing liquor or its turbulent flow in this case causes the filter surface of the additional filter is not clogged by forming a filter cake, but an unhindered passage of rinsing liquid or rinsing liquor is guaranteed.
  • This may be a complete rotation or only a partially circular or arcuate rotary or deflection movement, which is caused, for example, by deflecting means such as baffles or a channel guide.
  • a rotation of circulated rinsing liquor generating means is provided in the area of the hydraulic circuit.
  • These may be stationary baffles or vanes that impart rotation to flowing rinse liquid.
  • the means for generating a rotation of circulated rinsing agent comprise a circulating pump for circulating rinsing liquid.
  • the additional filter is arranged in the circulation pump.
  • the usual way provided filter combination can be extended in the dishwasher to the additional filter.
  • the additional filter is preceded by the sieve combination arranged in the sump in the flow direction of the rinsing liquid, which can carry out at least one coarse and / or fine filtration.
  • the rinsing liquid supplied to the additional filter is thus already precleared, so that the additional filter can be embodied as a microfilter, which is specially designed for filtering off dirt particles which are finely dispersed in the water.
  • the pump housing of the circulating pump has a paddle wheel space with a paddle wheel conveying the rinsing fluid and a pressure chamber arranged downstream thereof, into which the rinsing fluid delivered by the paddle wheel flows in a high flow rate.
  • the pressure chamber can transition in the flow direction into a flow channel, which leads the rinsing liquid to an outlet-side discharge nozzle of the circulation pump.
  • the additional filter is arranged in the pressure chamber, whereby the filter surface is constantly flushed due to the high turbulence of the inflowing into the pressure chamber rinsing liquid and thus can not be added by filter residues.
  • the pressure chamber according to the invention extends annularly around a central axis of the circulation pump. With a corresponding flow orientation, the rinsing liquid can move the pressure space in a rotational movement, i. H. tangential to a pressure chamber bounding the pump housing wall, flow through.
  • the flow direction can be correspondingly designed by a according to the invention between the Schaufelradraum and the pressure chamber flow guide, such as a stator, according to the circumferential direction.
  • Such a circular cross-flow in the pressure chamber ensures an increased residence time of the rinsing liquid in the pressure chamber and a complete overflow of the entire filter surface of the additional filter.
  • the flow-through pressure chamber from the additional filter according to the invention in an inlet chamber in which the rinsing liquid flows, and are divided into an outlet chamber from which the rinsing liquid flows to an outlet side discharge nozzle of the circulation pump.
  • the inlet chamber of the pressure chamber is located radially outside the outlet chamber of the pressure chamber with respect to the center axis of the circulation pump. The flushing liquid can thus flow over the additional filter in rotational movement along a radial outer wall of the pump housing.
  • the additional filter has at least one, preferably disc-shaped filter means that on a hollow cylindrical filter medium carrier sits, which divides the pressure chamber in the aforementioned inlet and outlet chamber.
  • the filter medium provided on the filter medium carrier can protrude into the inlet chamber.
  • the outer edge of the filter means is preferably not in contact with a radially opposite pump housing wall, but spaced therefrom by a flow gap in order to ensure the greatest possible flow around the filter medium.
  • a number of filter media spaced filter media sit on the hollow cylindrical filter media carrier.
  • the disc-shaped filter means therefore extend together with these filter spaces in an annular manner about the center axis of the circulation pump within the pressure chamber.
  • liquid flow therefore takes place within these filter chambers, a large surface overflow of the filter surfaces, whereby the filter surfaces are constantly flushed and filter residues can not clog the filter surfaces.
  • the cleaning of the additional filter, d. H. the cleaning of the additional filter upstream inlet chamber can be done by a flow reversal or a backwashing of rinsing liquid, whereby the filter residues are returned to the sump.
  • the filter residues collecting on a side wall of the pressure chamber can be discharged into the pump pot via a separate, valve-controlled channel, from where they can be conducted into the sewage system by means of a drain pump.
  • the filter surfaces beforehand filter residues can be provided in the above-mentioned filter spaces at least one freely movable cleaning body, which is freely movable in the filter chambers by the circular cross-flow of the rinsing liquid.
  • the pressure chamber of the circulation pump is assigned a heating element for heating the rinsing liquid.
  • the additional filter is arranged but also in dual function beyond heats the rinsing liquid.
  • the circulating in the hydraulic circuit rinsing liquid is heated accelerated in the pressure chamber.
  • FIG. 1 is a schematic diagram of a dishwasher with washing container 1, in which a not shown items to be washed in dish racks 3, 5 can be arranged.
  • two spraying arms 7, 9 provided in different spraying levels are arranged by way of example as spraying devices, with which the washware to be cleaned is supplied with washing liquid.
  • a pump pot 11 Under the Spül maerboden a pump pot 11 is provided with associated circulating pump 13, which is fluidly connected via fluid lines 15, 16 with the spray arms 7, 9.
  • the sump 11 is also connected via connecting pieces with a, connected to the water supply network fresh water supply line 17, and a drain line 18 in conjunction, in which a drain pump 19 is arranged to pump out contaminated rinsing liquid from the washing.
  • the pump pot 11 is arranged on the upper side with a flat, funnel-shaped fine filter 21, in the center of a hollow cylindrical, cup-shaped coarse filter 22 is inserted.
  • the fine filter 21 and the coarse filter 22 together with one according to the Fig. 2 used in the circulating pump 13 additional filter 23, a three-part filter system.
  • the sump 11 is connected via a fluid line 24 with the downstream circulation pump 13 in connection.
  • the liquid line 24 is, as in the Fig. 2 is indicated, pushed with its line end to an intake manifold 25 of the circulation pump 13, which is here for example coaxial with the central axis 26 of the circulating pump 13.
  • the circulating pump 13 has a rotatable about the central axis 26 paddle wheel 27 which is provided in a Schaufelradraum 28 within a pump housing 29.
  • the paddle wheel 27 is in drive connection via a drive shaft 30 with an only indicated electric motor 31.
  • the Schaufelradraum 28 is at its radially outer side via an annular gap 32 with an annular pressure chamber 33 in fluid communication.
  • the pressure chamber 33 extends rotationally symmetrically about the central axis 26 and radially outwardly beyond the intake manifold 25 between the Schaufelradraum 28 and the pressure chamber 33 is provided in the annular gap 32 as a flow guide 34, which is non-rotatably mounted on a bearing seat 35 of the pump housing 26.
  • the helically extending baffles of the stator 34 are made so steep that the inflowing rinsing liquid flows through the pressure chamber 33 in a high flow velocity in the radial circumferential direction, d. H. tangentially to the cylindrical pump housing wall 44.
  • the rinsing fluid flow flowing into the pressure chamber 33 has a low velocity component in the axial direction.
  • an annular flow channel 36 connects, through which the rinsing liquid is conveyed tangentially through an outlet-side discharge port 37 into the liquid line 14.
  • the additional filter 23 is arranged in the pressure chamber 33.
  • the additional filter 23 divides the pressure chamber 33 into a radially outer side inlet chamber 38 and into a radially inner side outlet chamber 39.
  • the additional filter 23 has here, by way of example, three disk-shaped filter means 40, which sit on a hollow cylindrical filter medium carrier 41, which extends in the axial direction through the pressure chamber 33.
  • the filter medium carrier 41 may be a pipe section whose front ends abut against opposite boundary walls 48 of the pressure chamber 33.
  • the disk-shaped filter means 40 are spaced with their outer edges over a free flow gap 42 of a housing outer wall 44.
  • the disc-shaped filter means 40 project radially outwardly into the inlet chamber 38. In the axial direction, the filter means are spaced by annular filter chambers 43 in which, if necessary, cleaning bodies are provided which remove the filter residues from the filter surface.
  • an example here as Dick Mrsheizelement 45 is provided which heats the circulating from the circulating pump 13 rinsing liquid.
  • the rinsing liquid is sucked in by the rotating bucket wheel 27 and guided at high flow speed through the bucket wheel space 28 into the pressure space 33.
  • the arranged in the pressure chamber 33 filter means 40 are flowed through by appropriate flow orientation on the stator 34 in a circular cross-flow. Due to the transverse flow, residues are removed from the filter surface of the disk-shaped filter means 40 and forced outward by centrifugal action to the housing outer wall 44. The filter residues accumulate in the lower region of the housing outer wall 44.
  • the filter residues in the inlet chamber 38 of the pressure chamber 33 can be returned to the sump 11 by a backwash from the circulation pump 13.
  • the paddle wheel 27 can be actuated in a direction opposite to the direction of rotation.
  • a valve-controlled drain 46 opening into the bottom region of the housing side wall 44 can be provided, as described in US Pat Fig. 1 is shown.
  • filter residues can be removed from the circulation pump.
  • the discharge line 46 as a blocking element to a solenoid valve 47 which can be opened and closed by the control device 35.
  • the derivative 46 is connected to the pump pot 11.
  • the control device 35 can open the solenoid valve 47 simultaneously with the activation of the drain pump 19 in a cleaning operation. In this way, the filter residues collected in the pressure chamber 33 are conducted via the discharge line 46 and the pump pot 11 into the sewage system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Filtration Of Liquid (AREA)

Claims (11)

  1. Appareil ménager à circulation d'eau, notamment lave-vaisselle ou lave-linge, comprenant un circuit hydraulique dans lequel du liquide de lavage peut être mis en circulation et dans lequel au moins un filtre supplémentaire (23) est ménagé pour filtrer la flotte de lavage en circulation, au moins un filtre supplémentaire (23) étant ménagé dans le circuit hydraulique pour filtrer la flotte de lavage en circulation, lequel filtre supplémentaire est disposé dans une partie du circuit hydraulique dans laquelle la flotte de lavage en circulation présente une rotation, des moyens générant une rotation de la flotte de lavage mise en circulation étant ménagés dans la partie du circuit hydraulique, lesquels moyens comprennent une pompe de circulation (13) pour la mise en circulation du liquide de lavage, dans laquelle pompe de circulation est disposé le filtre supplémentaire (23) et laquelle présente un espace à roue à godets (28) muni d'une roue à godets (27) transportant le liquide de lavage et une chambre de pression (33) disposée en aval de l'espace à roue à godets, le filtre supplémentaire (23) étant disposé dans la chambre de pression (33), la chambre de pression (33) étant divisée par le filtre supplémentaire (23) en une chambre d'admission (38) dans laquelle afflue le liquide de lavage, et en une chambre d'évacuation (39) hors de laquelle le liquide de lavage circule vers un embout de pression (37), côté évacuation, de la pompe de circulation (13) et la chambre de pression (33) et/ou la chambre d'admission (38) ainsi que la chambre d'évacuation (39) s'étendant de manière annulaire autour de l'axe médian (26) de la pompe de circulation (13),
    caractérisé en ce
    que la chambre d'admission (38) de la chambre de pression (33), par rapport à un axe médian (26) de la pompe de circulation (13), est située radialement à l'extérieur de la chambre d'évacuation (39) de la chambre de pression (33), en ce qu'un élément de guidage d'écoulement (34) est commuté entre l'espace à roue à godets (28) et la chambre de pression (33), et en ce que l'élément de guidage d'écoulement (34) introduit le liquide de lavage tangentiellement le long d'une paroi (44) du carter de pompe.
  2. Appareil ménager à circulation d'eau selon la revendication 1, caractérisé en ce qu'un puisard de pompe (11) est installé en amont de la pompe de circulation (13), dans lequel un filtre grossier et/ou un filtre fin (21, 22) sont disposés.
  3. Appareil ménager à circulation d'eau selon la revendication 2, caractérisé en ce que le filtre grossier et/ou le filtre fin (21, 22) présentent une ouverture de maille plus grande en comparaison avec le filtre supplémentaire (23).
  4. Appareil ménager à circulation d'eau selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le filtre supplémentaire (23) présente au moins un moyen de filtrage (40) de préférence en forme de disque, qui repose sur un support (41) de moyen de filtrage cylindrique creux, lequel divise la chambre de pression (33) en la chambre d'admission et la chambre d'évacuation (38, 39).
  5. Appareil ménager à circulation d'eau selon la revendication 4, caractérisé en ce que le support (41) de moyen de filtrage cylindrique creux, coaxialement à l'axe médian (26) de la pompe de circulation, s'étend entre des parois de délimitation opposées (43) de la chambre de pression (33).
  6. Appareil ménager à circulation d'eau selon la revendication 4 ou 5, caractérisé en ce que les moyens de filtrage (40) dépassent dans la chambre d'admission (38), et en ce qu'au moins un espace de filtrage (43) est délimité entre les moyens de filtrage (40) ou des parois de boîtier, lequel espace de filtrage s'étend de préférence de manière annulaire autour de l'axe médian (26) de la pompe de circulation (13).
  7. Appareil ménager à circulation d'eau selon la revendication 4, 5 ou 6, caractérisé en ce que le moyen de filtrage (40), dans une direction radiale vers l'extérieur, est distancé radialement d'une paroi (44) du carter de pompe par l'intermédiaire d'une fente d'écoulement (42).
  8. Appareil ménager à circulation d'eau selon la revendication 6 ou 7, caractérisé en ce qu'au moins un corps de nettoyage de préférence librement déplaçable est disposé dans l'espace de filtrage (43).
  9. Appareil ménager à circulation d'eau selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'un élément de chauffage (44) destiné à échauffer le liquide de lavage est attribué à la chambre de pression (33) de la pompe de circulation (13).
  10. Appareil ménager à circulation d'eau selon l'une quelconque des revendications 1 à 9, caractérisé en ce que la pompe de circulation (13) est reliée à un puisard de pompe (11) par l'intermédiaire d'une conduite d'évacuation (46).
  11. Appareil ménager à circulation d'eau selon la revendication 10, caractérisé en ce qu'un élément de blocage (47) est disposé dans la conduite d'évacuation (46), lequel ouvre de préférence la conduite d'évacuation (46) lorsqu'une pompe à liquide de lavage (19) évacue du liquide de lavage hors du puisard de pompe (11).
EP08861330.2A 2007-12-14 2008-11-11 Appareil ménager à circulation d'eau Active EP2230985B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007060193A DE102007060193A1 (de) 2007-12-14 2007-12-14 Wasserführendes Haushaltsgerät
PCT/EP2008/065292 WO2009077266A1 (fr) 2007-12-14 2008-11-11 Appareil ménager à circulation d'eau

Publications (2)

Publication Number Publication Date
EP2230985A1 EP2230985A1 (fr) 2010-09-29
EP2230985B1 true EP2230985B1 (fr) 2016-06-15

Family

ID=40340478

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08861330.2A Active EP2230985B1 (fr) 2007-12-14 2008-11-11 Appareil ménager à circulation d'eau

Country Status (6)

Country Link
US (1) US8733375B2 (fr)
EP (1) EP2230985B1 (fr)
CN (1) CN101896112B (fr)
DE (1) DE102007060193A1 (fr)
PL (1) PL2230985T3 (fr)
WO (1) WO2009077266A1 (fr)

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CN101896112B (zh) 2012-11-28
PL2230985T3 (pl) 2016-11-30
US20100252081A1 (en) 2010-10-07
WO2009077266A1 (fr) 2009-06-25
EP2230985A1 (fr) 2010-09-29
DE102007060193A1 (de) 2009-06-25
CN101896112A (zh) 2010-11-24
US8733375B2 (en) 2014-05-27

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