EP0150478A1 - Geschirrspüler mit selbstreinigendem Pumpenschutzfilter - Google Patents

Geschirrspüler mit selbstreinigendem Pumpenschutzfilter Download PDF

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Publication number
EP0150478A1
EP0150478A1 EP84116142A EP84116142A EP0150478A1 EP 0150478 A1 EP0150478 A1 EP 0150478A1 EP 84116142 A EP84116142 A EP 84116142A EP 84116142 A EP84116142 A EP 84116142A EP 0150478 A1 EP0150478 A1 EP 0150478A1
Authority
EP
European Patent Office
Prior art keywords
mesh filter
coarse
jet
water
filter
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
EP84116142A
Other languages
English (en)
French (fr)
Other versions
EP0150478B1 (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
Expired - Lifetime legal-status Critical Current

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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 durign operation of the machine.
  • Known dishwashing machines usually have 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 impeller of the discharge pump.
  • the corase-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 usually dismountable coarse-mesh filter has therefore to be cleaned at relatively short intervals.
  • jet nozzles are designed to produce jets of water substantially perpendicular to the axis of the coarse-mesh filter in proximity to the inlet side of the filteritself (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 comprising a washing tub provided with a fine-mesh filter disposed in the flowpath of water aspirated by a circulation pump and formed with an opening directly connecting the interior of said tub with the water intake of a discharge pump, and a coarse-mesh filter seted in said opening.
  • a dishwashing of this type is essentially characterized by comprising spray jet means adapted to direct at least one water jet against said coarse-mesh filter in a substantially coaxial direction therewith for effecting the cleaning thereof.
  • the spray jet means preferably comprise at least one additional opening formed in at least one rotatable arm provided for irrigating the dishes.
  • 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.
  • 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 6 is of a known configuration, having a frustoconical portion for the insertion of a removable coarse-mesh filter 8 of corrsponding shape disposed substantially in the flowpath of water from well 4 to a discharge pump 9.
  • Coars-mesh filter 8 acts in a known manner as a discharge pump protection filter.
  • the dishwashing machine includes spray jet means 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.
  • 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 edn of each operating cycle of the dishwashing machine.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Detergent Compositions (AREA)
  • Fats And Perfumes (AREA)
  • Disintegrating Or Milling (AREA)
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
IT8434002U IT8434002V0 (it) 1984-01-05 1984-01-05 Macchine lavastoviglie con filtro salvapompa autopulente.
IT3400284U 1984-01-05

Publications (2)

Publication Number Publication Date
EP0150478A1 true EP0150478A1 (de) 1985-08-07
EP0150478B1 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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1980193A1 (de) * 2006-05-30 2008-10-15 Electrolux Home Products Corporation N.V. Verfahren zur Reinigung des Filters eines Geschirrspülers und Geschirrspüler zur Ausführung dieses Verfahrens
US20170265712A1 (en) * 2016-03-17 2017-09-21 Samsung Electronics Co., Ltd. Self-cleaning filtration system for a dishwasher

Families Citing this family (6)

* 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.
IT211138Z2 (it) * 1986-06-04 1989-02-13 Zanussi Elettrodomestici Lavastoviglie con recupero del detersivo.
SE468269B (sv) * 1989-01-11 1992-12-07 Electrolux Ab Diskmaskin med finsil och mikrofilter anordnade i en uppsamlingsbehaallare
SE500246C2 (sv) * 1990-04-26 1994-05-24 Electrolux Ab Anornding vid en diskmaskin
US6782899B2 (en) * 2000-12-14 2004-08-31 Lg Electronics Inc. Dishwasher
KR100438270B1 (ko) * 2001-05-07 2004-07-02 엘지전자 주식회사 식기세척기

Citations (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
GB490913A (en) * 1937-03-02 1938-08-23 Separator Ab Improvements in dish-washing machine
DE1269776B (de) * 1960-01-16 1968-06-06 Boelkow Ludwig Filtereinrichtung an Geschirrspuelmaschinen
FR2445130A1 (fr) * 1978-12-29 1980-07-25 Hobart Corp Collecteur de salissures en derivation pour lave-vaisselle
EP0068974A1 (de) * 1981-06-30 1983-01-05 Esswein S.A. Geschirrspüler mit selbstreinigendem Sieb
EP0082592A1 (de) * 1981-11-09 1983-06-29 KITCHENAID, INC. (a Delaware corporation) Geschirrspüler

Patent Citations (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
GB490913A (en) * 1937-03-02 1938-08-23 Separator Ab Improvements in dish-washing machine
DE1269776B (de) * 1960-01-16 1968-06-06 Boelkow Ludwig Filtereinrichtung an Geschirrspuelmaschinen
FR2445130A1 (fr) * 1978-12-29 1980-07-25 Hobart Corp Collecteur de salissures en derivation pour lave-vaisselle
EP0068974A1 (de) * 1981-06-30 1983-01-05 Esswein S.A. Geschirrspüler mit selbstreinigendem Sieb
EP0082592A1 (de) * 1981-11-09 1983-06-29 KITCHENAID, INC. (a Delaware corporation) Geschirrspüler

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1980193A1 (de) * 2006-05-30 2008-10-15 Electrolux Home Products Corporation N.V. Verfahren zur Reinigung des Filters eines Geschirrspülers und Geschirrspüler zur Ausführung dieses Verfahrens
US20170265712A1 (en) * 2016-03-17 2017-09-21 Samsung Electronics Co., Ltd. Self-cleaning filtration system for a dishwasher
US10448801B2 (en) * 2016-03-17 2019-10-22 Samsung Electronics Co., Ltd. Self-cleaning filtration system for a dishwasher

Also Published As

Publication number Publication date
IT8434002V0 (it) 1984-01-05
EP0150478B1 (de) 1990-07-18
ATE54559T1 (de) 1990-08-15
ES283281U (es) 1985-05-01
DE3482759D1 (de) 1990-08-23
ES283281Y (es) 1985-12-16

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