EP0150478B1 - Geschirrspüler mit selbstreinigendem Pumpenschutzfilter - Google Patents

Geschirrspüler mit selbstreinigendem Pumpenschutzfilter Download PDF

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Publication number
EP0150478B1
EP0150478B1 EP84116142A EP84116142A EP0150478B1 EP 0150478 B1 EP0150478 B1 EP 0150478B1 EP 84116142 A EP84116142 A EP 84116142A EP 84116142 A EP84116142 A EP 84116142A EP 0150478 B1 EP0150478 B1 EP 0150478B1
Authority
EP
European Patent Office
Prior art keywords
mesh filter
coarse
filter
jet
water
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.)
Expired - Lifetime
Application number
EP84116142A
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English (en)
French (fr)
Other versions
EP0150478A1 (de
Inventor
Claudio Milocco
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.)
Industrie Zanussi SpA
Original Assignee
Industrie Zanussi SpA
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 Industrie Zanussi SpA filed Critical Industrie Zanussi SpA
Priority to AT84116142T priority Critical patent/ATE54559T1/de
Publication of EP0150478A1 publication Critical patent/EP0150478A1/de
Application granted granted Critical
Publication of EP0150478B1 publication Critical patent/EP0150478B1/de
Anticipated expiration legal-status Critical
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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
    • A47L15/4208—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
    • A47L15/42—Details
    • A47L15/4202—Water filter means or strainers
    • A47L15/4206—Tubular filters

Definitions

  • the present invention relates to a dishwashing machine provided with a discharge pump protection filter adapted to be automatically cleaned during operation of the machine, as set forth in the preamble of claim 1.
  • This dishwashing machine known from IT-A-952 947 comprises a water collection well at the bottom of a washing tub, with the inlet of a water circulation pump and the inlet of a water discharge pump connected to said well.
  • the water collection well houses a fine-mesh recirculation filter disposed in the flowpath of the water aspirated by the circulation pump.
  • the fine-mesh filter is formed with an opening directly connecting the interior of the tub with the inlet of the discharge pump. Disposed in this opening is a coarse mesh filter, referred to as a discharge pump protection filter and having as its main purpose the retention of coarse impurities, such as bits of china or glass, bones and the like which might otherwise obstruct or even damage the discharge pump.
  • the coarse-mesh pump protection filter will of course also retain shreds and bits of softer materials, such as paper shreds, breadcrumbs, fatty matter and the like, which may in the long run obstruct the filter, as part of the water aspirated by the circulation pump also passes therethrough.
  • the dismountable coarse-mesh filter has therefore to be cleaned at relatively short intervals. Furthermore, this dishwashing machine is provided with stationary jet nozzles for automatically cleaning the fine-mesh and coarse-mesh filters.
  • jet nozzles are designed to produce jets of water substantially perpendicularto the axis of the coarse-mesh filter in proximity to the inlet side of the filter itself (where the tangential water jet has practically no effect at all) and in an intermediate zone, where the coarse-mesh filter is surrounded by the fine-mesh filter which disperses the water jet so as to render it ineffective with regard to the coarse-mesh filter.
  • dishwashing machines provided with rotating jet nozzles directed perpendicularly to the fine-mesh filter in countercurrent to the flow of the water aspirated by the circulation pump.
  • This construction does not provide a solution for the problem of automatically cleaning the discharge pump protection filter.
  • the rotating jet nozzles In view of their inclined positions, the rotating jet nozzles have no cleaning effect on the coarse-mesh filter, resulting in the latter being all the more readily clogged by the impurities.
  • a dishwashing machine in which a part of the recirculated water is passed through a collection chamber which is separate from the general flow of fluid and in which coarse particles entrained by the water are collected, as this chamber is closed by a fine-mesh filter and is situated in a bypass flow path of the recirculated water, so that most of the water fed to the spray nozzles for cleaning the dishes is not passed through said collection chamber and may be pumped with reduced pumping power.
  • the flow of water through said collection chamber is reversed and the residuals collected therein are emptied through a discharge conduit by means of a discharge pump.
  • the spray jet means preferably comprise at least one additional opening formed in at least one rotatable arm provided for irrigating the dishes.
  • Fig. 1 and 2 show diagrammatic representations of dishwashing machines in two functionally equivalent embodiments of the invention.
  • a dishwashing machine comprises a washing tub 3 (only partially shown), the bottom of which is formed as a well 4 for collecting the dishwashing and rinsing water. Disposed in communication with well 4 is a circulation pump 5 supplying at least one rotatable arm 6 for irrigating the dishes and the like to be washed (not shown) in a per se known manner.
  • Washing tub 3 contains a fine-mesh filter 7 disposed in the flowpath of the water collecting in well 4 after having been sprayed onto the dishes, and to be aspirated again by circulation pump 5.
  • Fine-mesh filter 7 is of a known configuration, having a frustoconical portion 7a for the insertion of a removable coarse-mesh filter 8 of corresponding shape disposed substantially in the flowpath of water from well 4 to a discharge pump 9.
  • Coarse-mesh filter 8 acts in a known manner as a discharge pump protection filter, protecting in particular the impeller of said pump.
  • the spray jet means are arranged to direct at least one water jet onto filter 8 in a substantially coaxial direction thereof for automatically cleaning the filter by disintegrating low-consistency impurities collected therein.
  • the water jet may be produced by providing an additional opening 10 at the bottom side of rotatable irrigation arm 6 (Fig. 1). In this case the water jet 11 is effective to clean filter 8 in an intermittent manner.
  • water jet 11 may be produced by a stationary jet nozzle 12 (Fig. 2) connected to the outlet of circulation pump 5, preferably on a horizontal axis and associated with a deflector 13 for directing the water jet towards the pump protection filter 8.
  • Deflector 13 may of course be mounted at any position considered most favourable. Also, water jet 11 may be produced in any equivalent manner.
  • the discharge pump protection filter 8 will always have been efficiently cleaned at the end of each operating cycle of the dishwashing machine.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Fats And Perfumes (AREA)
  • Detergent Compositions (AREA)
  • Disintegrating Or Milling (AREA)

Claims (4)

1. Geschirrspülmaschine, enthaltend einen Waschbottich (3), der mit einem feinmaschigen Filter (7) versehen ist, das im Strömungsweg des Wassers angeordnet ist, das von einer Umwälzpumpe (5) angesaugt wird, und das mit einem kegelstumpfförmigen Abschnitt (7a) versehen ist, der eine Öffnung (14) ausbildet, der den Innenraum des Bottichs (3) mit dem Wassereinlaß einer Auslaßpumpe (9) direkt verbindet, und ein kegelstumpfförmiges, grobmaschiges Filter (8), das in dem kegelförmigen Abschnitt (7a) des feinmaschigen Filters (7) sitzt, und weiterhin enthaltend eine Sprühstrahleinrichtung (10, 12, 13), die dazu eingerichtet ist, wenigstens einen Wasserstrahl (11) gegen das grobmaschige Filter (8) von der Zulaufseite desselben her zu richten, dadurch gekennzeichnet, daß die genannte Sprühstrahleinrichtung (10; 12,13) dazu eingerichtet ist, den genannten wenigstens einer Wasserstrahl (11) in einer im wesentlichen mit dem grobmaschigen Filter 8 koaxialen Richtung während der Waschphase des Maschinenbetriebs zu richten, um das genannte Filter (8) automatisch durch Zerteilung von darin gesammelten Verunreinigungen niedriger Konsistenz zu reinigen.
2. Geschirrspülmaschine nach Anspruch 1, bei der die Umwälzpumpe (5) wenigstens einen drehbaren Sprüharm (6) zum Besprühen des Geschirrs versorgt, dadurch gekennzeichnet, daß die genannten Sprühstrahleinrichtungen wenigstens eine zusätzliche Öffnung (10) aufweisen, die in dem drehbaren Arm (6) ausgebildet ist.
3. Geschirrspülmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Sprühstrahleinrichtungen wenigstens eine stationäre Strahldüse (12) enthalten, die mit dem Auslaß der Umwälzpumpe (5) verbunden ist.
4. Geschirrspülmaschine nach Anspruch 3, bei der die Achse der stationären Strahldüse (12) sich im wesentlichen quer zur Achse des grobmaschigen Filters (8) erstreckt, dadurch gekennzeichnet, daß sie einen Ablenker (13) enthält, der dazu eingerichtet ist, den Wasserstrahl (11), der aus der stationären Strahldüse (12) austritt, gegen das grobmaschige Filter (8) zu richten.
EP84116142A 1984-01-05 1984-12-21 Geschirrspüler mit selbstreinigendem Pumpenschutzfilter Expired - Lifetime EP0150478B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84116142T ATE54559T1 (de) 1984-01-05 1984-12-21 Geschirrspueler mit selbstreinigendem pumpenschutzfilter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT3400284U 1984-01-05
IT8434002U IT8434002V0 (it) 1984-01-05 1984-01-05 Macchine lavastoviglie con filtro salvapompa autopulente.

Publications (2)

Publication Number Publication Date
EP0150478A1 EP0150478A1 (de) 1985-08-07
EP0150478B1 true EP0150478B1 (de) 1990-07-18

Family

ID=11238505

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84116142A Expired - Lifetime EP0150478B1 (de) 1984-01-05 1984-12-21 Geschirrspüler mit selbstreinigendem Pumpenschutzfilter

Country Status (5)

Country Link
EP (1) EP0150478B1 (de)
AT (1) ATE54559T1 (de)
DE (1) DE3482759D1 (de)
ES (1) ES283281Y (de)
IT (1) IT8434002V0 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0222306A1 (de) * 1985-11-13 1987-05-20 INDUSTRIE ZANUSSI S.p.A. Geschirrspülmaschine mit selbstreinigendem Rezirkulationsfilter
GB2191082A (en) * 1986-06-04 1987-12-09 Zanussi A Spa Industrie Dishwashing machine
EP0378980A2 (de) * 1989-01-11 1990-07-25 Aktiebolaget Electrolux Einrichtung für einen Geschirrspüler
EP0454640A1 (de) * 1990-04-26 1991-10-30 Aktiebolaget Electrolux Abfallzerkleinerungsvorrichtung für eine Geschirrspülmaschine
AU768976B2 (en) * 2001-05-07 2004-01-15 Lg Electronics Inc. Passage structure of dishwasher
AU771909B2 (en) * 2000-12-14 2004-04-08 Lg Electronics Inc. Dishwasher

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1862104A1 (de) * 2006-05-30 2007-12-05 Electrolux Home Products Corporation N.V. Verfahren zur Reinigung des Filters einer Geschirrspülmachine und Geschirrspülmachine zur Durchführung dieses Verfahrens.
US10448801B2 (en) * 2016-03-17 2019-10-22 Samsung Electronics Co., Ltd. Self-cleaning filtration system for a dishwasher

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB286092A (en) * 1927-03-04 1928-03-01 Valdemar Rendle Improvements in and relating to washing machines for crockery and the like
US2236791A (en) * 1937-03-02 1941-04-01 Laval Separator Co De Dishwashing machine
DE1269776B (de) * 1960-01-16 1968-06-06 Boelkow Ludwig Filtereinrichtung an Geschirrspuelmaschinen
AU527001B2 (en) * 1978-12-29 1983-02-10 Hobart International Inc. Warewasher bypass soil collector
US4392891A (en) * 1980-07-02 1983-07-12 Hobart Corporation Dishwasher soil collecting circuit
FR2508304B1 (fr) * 1981-06-30 1986-02-07 Esswein Sa Lave-vaisselle a filtre de recyclage automatiquement nettoye

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0222306A1 (de) * 1985-11-13 1987-05-20 INDUSTRIE ZANUSSI S.p.A. Geschirrspülmaschine mit selbstreinigendem Rezirkulationsfilter
GB2191082A (en) * 1986-06-04 1987-12-09 Zanussi A Spa Industrie Dishwashing machine
GB2191082B (en) * 1986-06-04 1989-12-06 Zanussi A Spa Industrie Dishwashing machine spray means for cleaning intake of discharge pump
EP0378980A2 (de) * 1989-01-11 1990-07-25 Aktiebolaget Electrolux Einrichtung für einen Geschirrspüler
EP0378980A3 (de) * 1989-01-11 1991-05-15 Aktiebolaget Electrolux Einrichtung für einen Geschirrspüler
EP0454640A1 (de) * 1990-04-26 1991-10-30 Aktiebolaget Electrolux Abfallzerkleinerungsvorrichtung für eine Geschirrspülmaschine
AU771909B2 (en) * 2000-12-14 2004-04-08 Lg Electronics Inc. Dishwasher
AU768976B2 (en) * 2001-05-07 2004-01-15 Lg Electronics Inc. Passage structure of dishwasher

Also Published As

Publication number Publication date
IT8434002V0 (it) 1984-01-05
ATE54559T1 (de) 1990-08-15
EP0150478A1 (de) 1985-08-07
DE3482759D1 (de) 1990-08-23
ES283281Y (es) 1985-12-16
ES283281U (es) 1985-05-01

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