EP1174075A2 - Filtering unit for dishwasher - Google Patents

Filtering unit for dishwasher Download PDF

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Publication number
EP1174075A2
EP1174075A2 EP01202686A EP01202686A EP1174075A2 EP 1174075 A2 EP1174075 A2 EP 1174075A2 EP 01202686 A EP01202686 A EP 01202686A EP 01202686 A EP01202686 A EP 01202686A EP 1174075 A2 EP1174075 A2 EP 1174075A2
Authority
EP
European Patent Office
Prior art keywords
filter
washing water
dishwasher
filtering
carry out
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
EP01202686A
Other languages
German (de)
French (fr)
Other versions
EP1174075B1 (en
EP1174075A3 (en
Inventor
Silvano Fumagalli
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.)
Candy SpA
Original Assignee
Candy 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 Candy SpA filed Critical Candy SpA
Publication of EP1174075A2 publication Critical patent/EP1174075A2/en
Publication of EP1174075A3 publication Critical patent/EP1174075A3/en
Application granted granted Critical
Publication of EP1174075B1 publication Critical patent/EP1174075B1/en
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 refers to a filtering unit for dishwasher.
  • Such filtering unit for the washing water which is arranged on the bottom zone of the washing tank of the dishwasher.
  • Such filtering unit is usually made up of a tray for the collection of the washing water that is provided with a filter container and with a pierced bucket arranged inside the filter container.
  • the washing water flows at first through the bucket where it undergoes a rough filtering action and then through the filter container where it undergoes a finer filtering action by means of the small size holes of the filter container; finally the filtered washing water is collected by the tray.
  • a filtering unit of the type described can also be self-cleaning, that is provided also with means that provide to the cleaning of the filter container.
  • scope of the present invention is to provide a filtering unit for dishwasher that solves. the aforementioned problem.
  • a filtering unit for dishwasher comprising a first large mesh filter arranged on the bottom of a washing tank of said dishwasher so as to collect and to filter the washing water contained in said tank, a second narrow mesh filter arranged around the first filter in order to carry out an additional filtering of said washing water, a tray for the collection of the filtered washing water, characterised in that between said first filter and said second filter a third intermediate mesh filter is arranged in order to carry out an additional filtering of the washing water before this reaches said second filter.
  • a second cylindrical filter 4 is arranged that is provided with passage areas for the flow of water smaller than those of the bucket 2 so as to carry out a second filtering operation of the washing water.
  • the filter 4 has a hole 5 on the bottom for the passage of water jets that are suitable to the cleaning of the filter 4.
  • a third filter made up of a filter container 6 is arranged that is provided with passage areas for the flow of water even smaller than those of the second filter 4 so as to carry out a third filtering operation of the washing water.
  • the filter container 6 is arranged inside of a tray 7 that is suitable to collect the filtered washing water.
  • the filters 2, 4, 6 allow to carry out an operation of gradual filtering of the washing water, which goes from a rough type filtering operated by the bucket 2 to a finer filtering operated by the filter container 6.
  • Said device 8 for the cleaning of the filters 4 and 6, better visible in Figure 2, is placed.
  • Said device 8 comprises a round ring 9 provided with a multiplicity of nozzles 10 with a circumferential symmetry, and a central nozzle 11 connected with the ring 9 by means of an appendix 12.
  • On the bottom such device 8 is connected with a tube 13 where the clean water flows at a certain pressure such as to allow the outflow of the water jet of a certain size from the central nozzle 11 for cleaning the cylindrical filter 4 through the hole 5 and from the nozzles 10 for cleaning the filter container 6.
  • the hole 5 of the intermediate filter 4 has a diameter smaller than the internal diameter of the round ring 9 of the device 8; in that way during the cleaning of the filters the dirty water can fall directly on the bottom of the tray 7 in order to be then discharged to the outside by means of an appropriate discharge pump not visible in the Figures.
  • the appendix 12 comprises a watertight closed-loop duct for the flow of the clean water coming from the tube 13 toward the nozzles 10.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Filtration Of Liquid (AREA)

Abstract

A filtering unit for dishwasher is described which comprises a first wide mesh filter (2) arranged on the bottom of a washing tank (3) of said dishwasher so as to collect and to filter the washing water contained in said tank (3), a second narrow mesh filter (6) arranged around the first filter (2) in order to carry out an additional filtering of said washing water, a tray (7) for the collection of the filtered washing water. Between the first filter (2) and the second filter (6) a third intermediate mesh filter (4) is arranged in order to carry out another filtering of the washing water before this reaches the second filter (6).

Description

  • The present invention refers to a filtering unit for dishwasher.
  • Generally there are known dishwashers that are provided with a filtering unit for the washing water which is arranged on the bottom zone of the washing tank of the dishwasher. Such filtering unit is usually made up of a tray for the collection of the washing water that is provided with a filter container and with a pierced bucket arranged inside the filter container. The washing water flows at first through the bucket where it undergoes a rough filtering action and then through the filter container where it undergoes a finer filtering action by means of the small size holes of the filter container; finally the filtered washing water is collected by the tray. A filtering unit of the type described can also be self-cleaning, that is provided also with means that provide to the cleaning of the filter container.
  • A problem in which often filtering units of the type described incur resides in the premature clogging of the filter container because of a multiplicity of debris or filaments that are carried by the washing water which manage to pass through the holes of the bucket.
  • In view of the state of the art herein described, scope of the present invention is to provide a filtering unit for dishwasher that solves. the aforementioned problem.
  • According to the present invention, such scope is reached by means of a filtering unit for dishwasher comprising a first large mesh filter arranged on the bottom of a washing tank of said dishwasher so as to collect and to filter the washing water contained in said tank, a second narrow mesh filter arranged around the first filter in order to carry out an additional filtering of said washing water, a tray for the collection of the filtered washing water, characterised in that between said first filter and said second filter a third intermediate mesh filter is arranged in order to carry out an additional filtering of the washing water before this reaches said second filter.
  • Owing to the present invention it is possible to provide a filtering unit for dishwasher which by means of an additional filter prevents the premature clogging of the filter container.
  • The characteristics and the advantages of the present invention will become evident from the following detailed description of an embodiment thereof, that is illustrated as a non-limiting example in the enclosed drawings, in which:
  • Figure 1 is a schematic view of the filtering unit for dishwasher according to the present invention ;
  • Figure 2 is a top view of the single device for the cleaning of the filters.
    • With reference to Figure 1 filtering unit 1 of a dishwasher machine not visible entirely in Figure is shown. The filtering unit 1 comprises a first filter made up of a bucket 2 provided with passages areas for the flow of water and arranged in the bottom part of a washing tank 3 of the dishwasher machine, so as to collect all the water contained in the tank 3 in order to carry out a first filtering of the same in a rough way due to the wideness of the passage areas of the bucket 2.
  • Externally to the bucket 2 and around it a second cylindrical filter 4 is arranged that is provided with passage areas for the flow of water smaller than those of the bucket 2 so as to carry out a second filtering operation of the washing water. The filter 4 has a hole 5 on the bottom for the passage of water jets that are suitable to the cleaning of the filter 4.
  • Externally to the second filter 4 and around it a third filter made up of a filter container 6 is arranged that is provided with passage areas for the flow of water even smaller than those of the second filter 4 so as to carry out a third filtering operation of the washing water. The filter container 6 is arranged inside of a tray 7 that is suitable to collect the filtered washing water. The filters 2, 4, 6 allow to carry out an operation of gradual filtering of the washing water, which goes from a rough type filtering operated by the bucket 2 to a finer filtering operated by the filter container 6.
  • On the bottom of the filter container 6 a device 8 for the cleaning of the filters 4 and 6, better visible in Figure 2, is placed. Said device 8 comprises a round ring 9 provided with a multiplicity of nozzles 10 with a circumferential symmetry, and a central nozzle 11 connected with the ring 9 by means of an appendix 12. On the bottom such device 8 is connected with a tube 13 where the clean water flows at a certain pressure such as to allow the outflow of the water jet of a certain size from the central nozzle 11 for cleaning the cylindrical filter 4 through the hole 5 and from the nozzles 10 for cleaning the filter container 6.
  • The hole 5 of the intermediate filter 4 has a diameter smaller than the internal diameter of the round ring 9 of the device 8; in that way during the cleaning of the filters the dirty water can fall directly on the bottom of the tray 7 in order to be then discharged to the outside by means of an appropriate discharge pump not visible in the Figures.
  • The appendix 12 comprises a watertight closed-loop duct for the flow of the clean water coming from the tube 13 toward the nozzles 10.

Claims (4)

  1. Filtering unit for dishwasher comprising a first wide mesh filter (2) arranged on the bottom of a washing tank (3) of said dishwasher so as to collect and to filter the washing water contained in said tank (3), a second narrow mesh filter (6) arranged around the first filter (2) in order to carry out an additional filtering of said washing water, a tray (7) for the collection of the filtered washing water, characterised in that between said first filter (2) and said second filter (6) a third intermediate mesh filter (4) is arranged in order to carry out another filtering of the washing water before this reaches said second filter (6).
  2. Unit according to claim 1, characterised in that it comprises a device (8) for the cleaning of the second (6) and third (4) filter arranged on the bottom of the second filter (6).
  3. Unit according to claim 2, characterised in that said device (8) comprises a multiplicity of circumferential nozzles (10) for the output of water jets suitable to clean the second filter (6) and a central nozzle (11) for the output of water jets suitable to clean the third filter (4).
  4. Unit according to claim 3, characterised in that said third filter (4) is provided with a hole (5) on the bottom and said circumferential nozzles (11) of said device (8) are arranged in a round ring (9) having an internal diameter greater than the diameter of the hole of said third filter (4) so that during the cleaning of the same the dirty water falls directly on the bottom of the tray (7).
EP01202686A 2000-07-18 2001-07-13 Filtering unit for dishwasher Expired - Lifetime EP1174075B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI001623 2000-07-18
IT2000MI001623A IT1318186B1 (en) 2000-07-18 2000-07-18 FILTERING APPARATUS FOR DISHWASHER

Publications (3)

Publication Number Publication Date
EP1174075A2 true EP1174075A2 (en) 2002-01-23
EP1174075A3 EP1174075A3 (en) 2002-09-25
EP1174075B1 EP1174075B1 (en) 2004-05-12

Family

ID=11445498

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01202686A Expired - Lifetime EP1174075B1 (en) 2000-07-18 2001-07-13 Filtering unit for dishwasher

Country Status (4)

Country Link
EP (1) EP1174075B1 (en)
DE (1) DE60103214T2 (en)
ES (1) ES2215850T3 (en)
IT (1) IT1318186B1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1320872C (en) * 2003-12-19 2007-06-13 Lg电子株式会社 Dishwasher
WO2009077280A1 (en) * 2007-12-14 2009-06-25 BSH Bosch und Siemens Hausgeräte GmbH Water-bearing domestic appliance
FR2935882A1 (en) * 2008-09-16 2010-03-19 Fagorbrandt Sas DISHWASHING MACHINE COMPRISING A DISHWASHER CLEANING WATER FILTRATION DEVICE.
EP2263512A1 (en) * 2009-06-17 2010-12-22 Bonferraro S.p.A. Hood-type industrial dishwasher with improved filter assembly
CN105395147A (en) * 2015-12-10 2016-03-16 佛山市顺德区美的洗涤电器制造有限公司 Dish-washing machine water cup component and mounting structure of dish-washing machine water cup component

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014221611A1 (en) * 2014-10-24 2016-04-28 BSH Hausgeräte GmbH Water-conducting household appliance

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1206125B (en) * 1960-12-21 1965-12-02 Constructa Werke G M B H Water supply device on dishwashers
DE1269776B (en) * 1960-01-16 1968-06-06 Boelkow Ludwig Filter device on dishwashers
DE1428358A1 (en) * 1964-12-16 1968-11-14 Braun Ag Dishwasher with circulating rinsing water
DE7146547U (en) * 1973-06-07 Miele & Cie Dishwasher with a coarse filter and a fine filter
DE2657354A1 (en) * 1976-12-17 1978-06-29 Wmf Wuerttemberg Metallwaren CLEANING DEVICE FOR A BEVERAGE PREPARATION CONTAINER
DE2832084A1 (en) * 1978-07-21 1980-01-31 Licentia Gmbh Dishwasher machine with plastics filter - has two displaceable mesh sieves which set mesh size according to position
GB2096456A (en) * 1981-04-10 1982-10-20 Bosch Siemens Hausgeraete Dishwashing machine sump filter
DE3507229A1 (en) * 1985-03-01 1986-09-04 Miele & Cie GmbH & Co, 4830 Gütersloh Device on dish-washing machines for filtering the circulated washing water
US4972861A (en) * 1988-11-23 1990-11-27 Industrie Zanussi S.P.A. Washing machine including improved apparatus for cleaning a recirculating filter thereof
DE4103056A1 (en) * 1991-02-01 1992-08-13 Licentia Gmbh Dishwashing machine with concentric coarse and fine strainers - has underside of intermediate strainer extending to top of drain and spaced radially from finest strainer
DE4131914A1 (en) * 1991-09-25 1993-04-01 Licentia Gmbh Sieve combination for domestic dishwasher - has inside fine sieve cylinder provided with cover and centrally around coarse sieve axially rotatable conical micro-sieve
DE4200416A1 (en) * 1992-01-10 1993-07-15 Licentia Gmbh Divided-flow filter combination for domestic dishwashing machine - optimises self-cleaning by directing separate flows of rinsing water at inclined and vertical sections of fine filter.
DE9116856U1 (en) * 1991-02-01 1994-06-30 Licentia Patent-Verwaltungs-Gmbh, 60596 Frankfurt Dishwasher with a sieve arrangement
DE4310403A1 (en) * 1993-03-31 1994-10-06 Licentia Gmbh Dishwashing machine with a washing container
DE4344245A1 (en) * 1993-12-23 1995-06-29 Bosch Siemens Hausgeraete Device on dishwashers for filtering the washing water
DE4418523A1 (en) * 1994-05-27 1995-11-30 Licentia Gmbh Domestic dishwashing machine float-controlled filter combination
EP0855165A2 (en) * 1997-01-22 1998-07-29 SMEG S.p.A. Improved filtering device for dishwashers
DE3745169C2 (en) * 1986-11-13 1999-07-22 Candy Elettrodomestici Operating dishwasher in work cycle

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7146547U (en) * 1973-06-07 Miele & Cie Dishwasher with a coarse filter and a fine filter
DE1269776B (en) * 1960-01-16 1968-06-06 Boelkow Ludwig Filter device on dishwashers
DE1206125B (en) * 1960-12-21 1965-12-02 Constructa Werke G M B H Water supply device on dishwashers
DE1428358A1 (en) * 1964-12-16 1968-11-14 Braun Ag Dishwasher with circulating rinsing water
DE2657354A1 (en) * 1976-12-17 1978-06-29 Wmf Wuerttemberg Metallwaren CLEANING DEVICE FOR A BEVERAGE PREPARATION CONTAINER
DE2832084A1 (en) * 1978-07-21 1980-01-31 Licentia Gmbh Dishwasher machine with plastics filter - has two displaceable mesh sieves which set mesh size according to position
GB2096456A (en) * 1981-04-10 1982-10-20 Bosch Siemens Hausgeraete Dishwashing machine sump filter
DE3507229A1 (en) * 1985-03-01 1986-09-04 Miele & Cie GmbH & Co, 4830 Gütersloh Device on dish-washing machines for filtering the circulated washing water
DE3745169C2 (en) * 1986-11-13 1999-07-22 Candy Elettrodomestici Operating dishwasher in work cycle
US4972861A (en) * 1988-11-23 1990-11-27 Industrie Zanussi S.P.A. Washing machine including improved apparatus for cleaning a recirculating filter thereof
DE9116856U1 (en) * 1991-02-01 1994-06-30 Licentia Patent-Verwaltungs-Gmbh, 60596 Frankfurt Dishwasher with a sieve arrangement
DE4103056A1 (en) * 1991-02-01 1992-08-13 Licentia Gmbh Dishwashing machine with concentric coarse and fine strainers - has underside of intermediate strainer extending to top of drain and spaced radially from finest strainer
DE4131914A1 (en) * 1991-09-25 1993-04-01 Licentia Gmbh Sieve combination for domestic dishwasher - has inside fine sieve cylinder provided with cover and centrally around coarse sieve axially rotatable conical micro-sieve
DE4200416A1 (en) * 1992-01-10 1993-07-15 Licentia Gmbh Divided-flow filter combination for domestic dishwashing machine - optimises self-cleaning by directing separate flows of rinsing water at inclined and vertical sections of fine filter.
DE4310403A1 (en) * 1993-03-31 1994-10-06 Licentia Gmbh Dishwashing machine with a washing container
DE4344245A1 (en) * 1993-12-23 1995-06-29 Bosch Siemens Hausgeraete Device on dishwashers for filtering the washing water
DE4418523A1 (en) * 1994-05-27 1995-11-30 Licentia Gmbh Domestic dishwashing machine float-controlled filter combination
EP0855165A2 (en) * 1997-01-22 1998-07-29 SMEG S.p.A. Improved filtering device for dishwashers

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1320872C (en) * 2003-12-19 2007-06-13 Lg电子株式会社 Dishwasher
WO2009077280A1 (en) * 2007-12-14 2009-06-25 BSH Bosch und Siemens Hausgeräte GmbH Water-bearing domestic appliance
FR2935882A1 (en) * 2008-09-16 2010-03-19 Fagorbrandt Sas DISHWASHING MACHINE COMPRISING A DISHWASHER CLEANING WATER FILTRATION DEVICE.
EP2165637A3 (en) * 2008-09-16 2014-10-29 FagorBrandt SAS Dish washer with a filtering device for the water to clean crockery
EP2263512A1 (en) * 2009-06-17 2010-12-22 Bonferraro S.p.A. Hood-type industrial dishwasher with improved filter assembly
EP2263512B1 (en) 2009-06-17 2015-06-17 Bonferraro S.p.A. Hood-type industrial dishwasher with improved filter assembly
CN105395147A (en) * 2015-12-10 2016-03-16 佛山市顺德区美的洗涤电器制造有限公司 Dish-washing machine water cup component and mounting structure of dish-washing machine water cup component

Also Published As

Publication number Publication date
IT1318186B1 (en) 2003-07-23
DE60103214T2 (en) 2005-05-04
ES2215850T3 (en) 2004-10-16
EP1174075B1 (en) 2004-05-12
EP1174075A3 (en) 2002-09-25
ITMI20001623A0 (en) 2000-07-18
DE60103214D1 (en) 2004-06-17
ITMI20001623A1 (en) 2002-01-18

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