EP2263512B2 - Hood-type industrial dishwasher with improved filter assembly - Google Patents

Hood-type industrial dishwasher with improved filter assembly Download PDF

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Publication number
EP2263512B2
EP2263512B2 EP09425235.0A EP09425235A EP2263512B2 EP 2263512 B2 EP2263512 B2 EP 2263512B2 EP 09425235 A EP09425235 A EP 09425235A EP 2263512 B2 EP2263512 B2 EP 2263512B2
Authority
EP
European Patent Office
Prior art keywords
filtering element
dishwasher according
opening
sump
wash
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
EP09425235.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2263512A1 (en
EP2263512B1 (en
Inventor
Ezio Gobbi
Damiano Piazza
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.)
Bonferraro SpA
Original Assignee
Bonferraro 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=41258766&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2263512(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Bonferraro SpA filed Critical Bonferraro SpA
Priority to PL09425235T priority Critical patent/PL2263512T5/pl
Priority to EP09425235.0A priority patent/EP2263512B2/en
Publication of EP2263512A1 publication Critical patent/EP2263512A1/en
Publication of EP2263512B1 publication Critical patent/EP2263512B1/en
Application granted granted Critical
Publication of EP2263512B2 publication Critical patent/EP2263512B2/en
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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
    • A47L15/0076—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals
    • A47L15/0081—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals with vertical sliding closing doors, e.g. hood-type dishwashers
    • 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
    • A47L15/4204—Flat 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
    • A47L15/4202—Water filter means or strainers
    • A47L15/4206—Tubular filters

Definitions

  • the present invention relates to industrial dishwashers, and in particular to a hood-type dishwasher with an improved filter assembly aimed at a more effective and efficient washing of the dishes.
  • the object of the present invention is to provide a hood-type dishwasher with an improved filter assembly which overcomes said drawback.
  • the main advantage of the dishwasher according to the present invention is that of having a filter assembly that achieves a high filtering without clogging problems, since it is capable of retaining all those residues that could actually cause damage to the machine while letting through all those residues that could cause the clogging, so as to validly contribute to a good wash effectiveness of the dishwasher.
  • a second advantage of the above-mentioned filter assembly is that it is divided in two parts so as to maintain the possibility of removing the top filter for large residues also when the sump is full, while the wash and drain circuit remains protected by the bottom filter so as to limit the risk that during the removal of the top filter other dirt residues present along the edge of the flat filter and having a size greater than that allowed fall into the sump and end up blocking the pumps or clogging the nozzles.
  • Another advantage of the present dishwasher is that the improved filter assembly is made up of few simple parts, which positively affects its cost and the ease in assembling and disassembling it.
  • the filter assembly of a dishwasher includes a first top filtering element 1, introduced from above into a central opening 2a of a concave-shaped flat filter 2 that acts as a lid of the collecting sump 3 formed in the tank bottom 4.
  • a second bottom filtering element 5 is similarly introduced from above into a central opening 3a at the bottom of the sump 3, said opening 3a being concentric with said opening 2a in the flat filter 2, and a manifold 6 is secured under opening 3a for the connection to the wash and drain pumps.
  • the correct positioning of the bottom filtering element 5 is detected by a suitable sensor that authorizes the operation of the dishwasher.
  • a suitable sensor that authorizes the operation of the dishwasher.
  • An example of such a sensor illustrated only in Figs.1 and 2 , consists of a reed switch 7 arranged in manifold 6 so as to detect the presence of a magnet 8 located in the bottom filtering element 5.
  • the flat filter 2 consists of a perforated stainless steel sheet, with holes having a diameter indicatively between 1,5 and 2,5 mm, which has the function of letting through most (about 75-85%) of the flow rate of the wash pump, and of receiving in its central opening 2a the first filtering element 1 that is made up of two coaxial bodies 1a, 1b joined at their bases through connecting ribs that leave a circular passage 9 whose width "w" ranges from 4 to 6 mm, preferably 5 mm.
  • the inner body 1a is a closed cylinder but for openings on the top side and the outer body 1b is slightly frustoconical and has a top peripheral rim 10 for fitting into opening 2a, a diametral crossbar 11 for its handling, as well as a side wall with vertical passage slots having a width indicatively between 1 and 1,5 mm, preferably 1,2 mm.
  • the connecting ribs defining the circular passage 9 are formed with a pitch in the range from 10 to 16 mm, preferably between 12 and 14 mm.
  • the second filtering element 5 is made up of three coaxial bodies 5a, 5b and 5c of different diameter joined through a circular ring 5d provided with openings. More specifically, the inner body 5a is a solid cylinder extending above ring 5d and has an inlet 12 at the top with an inward tapering; the outer body 5b, slightly frustoconical, also extends solid above ring 5d but is much shorter than cylinder 5a and has a top peripheral rim 13 for fitting into opening 3a of sump 3; and finally the intermediate body 5c is a solid cylinder extending below ring 5d.
  • Both the latter and rim 13 are provided with passage slots having a size equal to or greater than the passage holes of the flat filter 2, indicatively 2,5 mm wide, yet such as to retain the residues having a size that could clog the wash nozzles or block the wash pump.
  • the largest residues retained within the top filtering element 1, having a size such that they can not be discharged through the drain pump, even when the machine is in the operating condition (i.e. with sump 3 full of water) can be removed by the operator by removing only element 1 for cleaning, as shown in Fig.5 .
  • This operation there is the risk that large residues possibly present along the edge of opening 2a fall into sump 3 but even if they did fall therein they would be retained, as previously explained, by ring 5d and rim 13 of the bottom filtering element 5 which, at the end of the use of the machine when sump 3 is empty, can be in turn removed from opening 3a and thoroughly washed.
  • tapered shape of inlet 12 coupling with the similarly tapered outlet 14 has the function not only of assuring a good coupling between the two filtering elements, but also to increase the horizontal distance "d" between the edge of inlet 12 and the edge of opening 2a so as to limit the risk that during the removal of the top filtering element 1 large residues present along the edge of opening 2a fall and reach the discharge region by entering the central cylinder 5 a.
  • the filtering elements 1 and 5 could even be without radial symmetry and openings 2a, 3a could be not concentric as long as the filter assembly forms a smooth path for the passage of residues of suitable size towards the drain pump.

Landscapes

  • Washing And Drying Of Tableware (AREA)
EP09425235.0A 2009-06-17 2009-06-17 Hood-type industrial dishwasher with improved filter assembly Active EP2263512B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL09425235T PL2263512T5 (pl) 2009-06-17 2009-06-17 Przemysłowa zmywarka kapturowa z ulepszonym zespołem filtracyjnym
EP09425235.0A EP2263512B2 (en) 2009-06-17 2009-06-17 Hood-type industrial dishwasher with improved filter assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09425235.0A EP2263512B2 (en) 2009-06-17 2009-06-17 Hood-type industrial dishwasher with improved filter assembly

Publications (3)

Publication Number Publication Date
EP2263512A1 EP2263512A1 (en) 2010-12-22
EP2263512B1 EP2263512B1 (en) 2015-06-17
EP2263512B2 true EP2263512B2 (en) 2019-01-09

Family

ID=41258766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09425235.0A Active EP2263512B2 (en) 2009-06-17 2009-06-17 Hood-type industrial dishwasher with improved filter assembly

Country Status (2)

Country Link
EP (1) EP2263512B2 (pl)
PL (1) PL2263512T5 (pl)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160374535A1 (en) * 2011-06-20 2016-12-29 Whirlpool Corporation Dishwasher with microfilter
US20120318296A1 (en) * 2011-06-20 2012-12-20 Whirlpool Corporation Ultra micron filter for a dishwasher
ITTO20120164A1 (it) * 2012-02-24 2013-08-25 Premark Feg Llc Macchina lavastoviglie con vasca migliorata, in particolare del tipo a cappa mobile
JP6657068B2 (ja) * 2016-12-26 2020-03-04 ホシザキ株式会社 洗浄機
US10893791B2 (en) 2018-07-19 2021-01-19 Whirlpool Corporation Dishwasher and sump assembly

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3723721A1 (de) † 1986-11-13 1988-05-26 Candy Elettrodomestici Verfahren fuer den betrieb einer waschmaschine, insbesondere einer geschirrspuelmaschine, und nach einem solchen verfahren arbeitende waschmaschine
EP0468517A1 (en) † 1990-07-27 1992-01-29 Daikin Industries, Limited Method and apparatus for washing dishes
US5762080A (en) † 1997-01-24 1998-06-09 White Consolidated Industries, Inc. Dishwasher cycle pulsing pump out of collection chamber
DE19906791A1 (de) † 1999-02-18 2000-08-24 Miele & Cie Programmgesteuerte Geschirrspülmaschine
EP1386575A1 (en) † 2002-07-31 2004-02-04 CANDY S.p.A. Dishwashing machine with macerator filter caused to rotate by the wash liquid flow
WO2004096005A1 (en) † 2003-04-25 2004-11-11 Electrolux Home Product Corporation N.V. Filter system for a household dishwasher
EP1477552A1 (en) † 2003-05-13 2004-11-17 Ecolab Inc. Method for cleaning articles in a dish washing machine
DE102004004104A1 (de) † 2003-12-23 2005-07-28 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit alternierendem Pumpenbetrieb
EP2042073A1 (en) † 2007-09-28 2009-04-01 Bonferraro S.p.A. Operating cycle for industrial dishwasher

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2832084A1 (de) 1978-07-21 1980-01-31 Licentia Gmbh Geschirrspuelmaschine
DE3021081C2 (de) 1980-06-04 1983-02-24 Aweco Apparate- und Gerätebau GmbH & Co KG, 7995 Neukirch Einrichtung zur Niveauregelung bei Geschirrspül- oder Waschmaschinen
DE3114663C2 (de) 1981-04-10 1992-11-26 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Siebanordnung in der Ablaufwanne des Spülbehälters einer Geschirrspülmaschine
DE3626351A1 (de) 1986-08-04 1988-02-11 Licentia Gmbh Verfahren zum betreiben einer geschirrspuelmaschine
IT211726Z2 (it) 1987-04-08 1989-04-07 Zanussi Elettrodomestici Macchina lavastoviglie con filtro di ricircolo atupoulente.
DE3842640C2 (de) 1988-12-18 1996-07-18 Hobart Corp N D Ges Des Staate Geschirrspülmaschine
DE4236931C3 (de) 1991-11-13 2002-08-01 Miele & Cie Sammeltopf einer Geschirrspülmaschine mit einer Siebkombination
KR970010423B1 (ko) 1995-09-19 1997-06-26 엘지전자 주식회사 식기세척기의 오물 처리방법 및 그 장치
IT1289186B1 (it) 1997-01-22 1998-09-29 Smeg Spa Dispositivo di filtrazione perfezionato per macchine lavastoviglie
IT1318186B1 (it) 2000-07-18 2003-07-23 Candy Spa Apparato di filtraggio per lavastoviglie
ITTO20010353A1 (it) 2001-04-11 2002-10-11 T & P Spa Sistema per il controllo della durezza dell'acqua di lavaggio in una macchina di lavaggio e relativo metodo di controllo.
KR100529879B1 (ko) 2002-11-28 2005-11-22 엘지전자 주식회사 식기세척기의 필터 청소장치
ATE308267T1 (de) 2003-07-16 2005-11-15 Bonferraro Spa Geschirrspülmaschine mit mitteln zur reduzierung des energie- und wasserverbrauchs
DE202006020580U1 (de) 2006-06-09 2009-01-22 Premark Feg L.L.C., Wilmington Gewerbliche Geschirrspülmaschine in Form eines Programmautomaten
DE602008000512D1 (de) 2008-02-08 2010-02-25 Bonferraro Spa Filteranordnung für industrielle Geschirrspüler

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3723721A1 (de) † 1986-11-13 1988-05-26 Candy Elettrodomestici Verfahren fuer den betrieb einer waschmaschine, insbesondere einer geschirrspuelmaschine, und nach einem solchen verfahren arbeitende waschmaschine
EP0468517A1 (en) † 1990-07-27 1992-01-29 Daikin Industries, Limited Method and apparatus for washing dishes
US5762080A (en) † 1997-01-24 1998-06-09 White Consolidated Industries, Inc. Dishwasher cycle pulsing pump out of collection chamber
DE19906791A1 (de) † 1999-02-18 2000-08-24 Miele & Cie Programmgesteuerte Geschirrspülmaschine
EP1386575A1 (en) † 2002-07-31 2004-02-04 CANDY S.p.A. Dishwashing machine with macerator filter caused to rotate by the wash liquid flow
WO2004096005A1 (en) † 2003-04-25 2004-11-11 Electrolux Home Product Corporation N.V. Filter system for a household dishwasher
EP1477552A1 (en) † 2003-05-13 2004-11-17 Ecolab Inc. Method for cleaning articles in a dish washing machine
DE102004004104A1 (de) † 2003-12-23 2005-07-28 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit alternierendem Pumpenbetrieb
EP2042073A1 (en) † 2007-09-28 2009-04-01 Bonferraro S.p.A. Operating cycle for industrial dishwasher

Also Published As

Publication number Publication date
EP2263512A1 (en) 2010-12-22
EP2263512B1 (en) 2015-06-17
PL2263512T5 (pl) 2019-05-31
PL2263512T3 (pl) 2015-11-30

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