EP2230985A1 - Appareil ménager à circulation d'eau - Google Patents

Appareil ménager à circulation d'eau

Info

Publication number
EP2230985A1
EP2230985A1 EP08861330A EP08861330A EP2230985A1 EP 2230985 A1 EP2230985 A1 EP 2230985A1 EP 08861330 A EP08861330 A EP 08861330A EP 08861330 A EP08861330 A EP 08861330A EP 2230985 A1 EP2230985 A1 EP 2230985A1
Authority
EP
European Patent Office
Prior art keywords
water
household appliance
filter
appliance according
conducting household
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
EP08861330A
Other languages
German (de)
English (en)
Other versions
EP2230985B1 (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 Bosch und Siemens 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 Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2230985A1 publication Critical patent/EP2230985A1/fr
Application granted granted Critical
Publication of EP2230985B1 publication Critical patent/EP2230985B1/fr
Active 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
    • A47L15/4206—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.
  • 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 can not clog the outlet openings of the spray arms.
  • 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 circulated rinsing liquor has a rotation.
  • the rotation of the circulating rinsing liquor or its turbulent flow 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 are preferably provided in the region of the hydraulic circuit. These may be stationary baffles or vanes that impart rotation to flowing rinse liquid. However, it is preferably provided that 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 circulation pump can have a paddle wheel space with a paddle wheel conveying the rinsing fluid and a pressure chamber arranged downstream thereof, into which the rinsing fluid conveyed 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 preferably arranged in the pressure chamber, as a result of which the filter surface thereof is constantly flushed due to the high turbulence of the rinsing liquid flowing into the pressure chamber and thus can not be added by filter residues.
  • the pressure chamber preferably extends annularly around a central axis of the circulation pump.
  • 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 in the circumferential direction by means of a flow guide element, for example a guide wheel, connected between the blade wheel space and the pressure chamber.
  • a flow guide element for example a guide wheel
  • the flow-through pressure chamber from the additional filter into an inlet chamber in which the rinsing liquid flows, and be 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 rinsing liquid can thus in rotational movement along a radial outer wall of the pump housing overflow the additional filter.
  • the additional filter has at least one, preferably disc-shaped filter means sitting on a hollow cylindrical filter medium carrier, which divides the pressure chamber into the already mentioned 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 shows a schematic block diagram of a dishwasher according to the invention.
  • Fig. 2 in a side sectional view of a hydraulic circuit used in the dishwasher circulating pump.
  • FIG. 1 a dishwashing machine with washing container 1 is shown roughly in which a washware, not shown, can be arranged in dishwashing baskets 3, 5.
  • 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 Spellergeber 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 1 1 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 connection, in which a drain pump 19 is arranged to pump out contaminated rinsing liquid from the washing.
  • the pump pot 1 1 is arranged on the upper side with a flat, funnel-shaped fine filter 21, in which a hollow cylindrical, cup-shaped coarse filter 22 is inserted centrally.
  • the fine filter 21 and the coarse filter 22 together with an additional filter 23 used in the circulating pump 13 according to FIG. 2 form 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 indicated in Fig.
  • the circulating pump 13 has a bucket wheel 27 rotatable about the central axis 26 and provided in a bucket wheel space 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 symmetrical 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 guide walls of the guide wheel 34 are set so steeply that the inflowing Spülillon- keitsströmung 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, the front-side 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.
  • 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 of a thick-film heating element 45 is provided here, which heats the rinsing liquid circulated by the circulating pump 13.
  • 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.
  • residues are removed from the filter surface of the disk-shaped filter means 40 and forced outwards by centrifugal action against 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 recycled by a backwashing of the circulation pump 13 in the pump pot 1 1.
  • 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 shown in FIG. 1.
  • 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 1 1.
  • 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 1 1 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)

Abstract

La présente invention concerne un appareil ménager à circulation d'eau, en particulier un lave-vaisselle ou une machine à laver, doté d'un circuit hydraulique dans lequel peut circuler le liquide de lavage et dans lequel est prévu au moins un filtre supplémentaire (23) pour filtrer le liquide de lavage en circulation. Selon l'invention, le circuit hydraulique contient au moins un filtre supplémentaire (23) pour filtrer le liquide de lavage en circulation, ledit filtre étant disposé dans une section du circuit hydraulique, dans laquelle le liquide de lavage est soumis à une rotation.
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 true EP2230985A1 (fr) 2010-09-29
EP2230985B1 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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Publication number Publication date
EP2230985B1 (fr) 2016-06-15
US8733375B2 (en) 2014-05-27
CN101896112A (zh) 2010-11-24
US20100252081A1 (en) 2010-10-07
CN101896112B (zh) 2012-11-28
PL2230985T3 (pl) 2016-11-30
WO2009077266A1 (fr) 2009-06-25
DE102007060193A1 (de) 2009-06-25

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