WO2015127982A1 - Filtre fin ayant une efficacité de filtration améliorée, destiné à être utilisé dans un lave-vaisselle et lave-vaisselle le comprenant - Google Patents

Filtre fin ayant une efficacité de filtration améliorée, destiné à être utilisé dans un lave-vaisselle et lave-vaisselle le comprenant Download PDF

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Publication number
WO2015127982A1
WO2015127982A1 PCT/EP2014/053931 EP2014053931W WO2015127982A1 WO 2015127982 A1 WO2015127982 A1 WO 2015127982A1 EP 2014053931 W EP2014053931 W EP 2014053931W WO 2015127982 A1 WO2015127982 A1 WO 2015127982A1
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WO
WIPO (PCT)
Prior art keywords
region
openings
fine filter
filter
dishwasher
Prior art date
Application number
PCT/EP2014/053931
Other languages
English (en)
Inventor
Yusuf Koc
Ugur Kan
Gokhan Ak
Ozan KURAL
Original Assignee
Arcelik Anonim Sirketi
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 Arcelik Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Priority to PCT/EP2014/053931 priority Critical patent/WO2015127982A1/fr
Publication of WO2015127982A1 publication Critical patent/WO2015127982A1/fr

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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
    • A47L15/4204—Flat filters

Definitions

  • the present invention relates to a fine filter for filtering a wash fluid in a dishwasher.
  • the present invention particularly relates to a fine filter which has an aperture for inserting a filter assembly which includes a coarse filter and a micro filter.
  • a dishwasher generally includes a hydraulic circuit for circulating the wash fluid inside a washing tub.
  • the hydraulic circuit includes a sump which is provided on a bottom of the washing tub and a pump which conveys the wash fluid collected in the sump to the spray arms by means of conduits.
  • the spray arms direct the pressurized wash fluid towards the articles on the racks.
  • the wash fluid resolves the dirt from the articles and drains down together with the resolved dirt along the side walls into the sump.
  • a fine filter must be arranged on a bottom of the washing tub which completely covers the sump.
  • the fine filter has a filter surface and a plurality of fine openings formed into the filter surface which allows the wash fluid to drain into the sump.
  • the filter surface is usually inclined.
  • the coarse dirt which cannot pass through the fine openings flows along the filter surface into the filter assembly where it is eventually trapped. The coarse dirt must be manually removed by a user after termination of the washing course.
  • a proper functioning of the hydraulic circuit depends on the performance of the fine filter. If the filter is too fine, the openings start to get clogged and the flow of wash fluid into the sump is reduced. Thus, the circulation of the wash fluid via the pump and the spray arms is eventually impaired. Due to the unstable flow of the wash fluid, an auto-protective mechanism shuts the heater off and an efficiency of the heating process also degrades. If the filter is too coarse, the dirt is drained together with the wash fluid into the sump and recirculated via the pump and the spray arms. In either of the above-described cases, the articles cannot be effectively washed.
  • US 2012/0024768 A1 discloses a flat funnel-type fine filter element which covers a sump of a dishwasher.
  • the flat funnel-type filter element has an insertion opening into which a hollow cylindrical pot-type coarse filter is inserted.
  • An objective of the present invention is to provide a filter for use in a dishwasher, which overcomes the aforementioned drawbacks of the prior art and which enables improved filtration of dirt from the wash fluid.
  • the filter surface has a plurality of regions which are circumferentially arranged around the aperture.
  • the plurality of regions includes a first region and a second region into which a plurality of openings are respectively formed.
  • a material thickness of the first region is different from the material thickness of the second region and/or a percentage of an open area of the entire first region is different from a percentage of an open area of the entire second region.
  • the material thicknesses of the regions are not greater than 1.2 mm respectively.
  • the percentages of open areas of the regions are not less than 40 % respectively.
  • the openings of two or more than two regions have different sizes, in particular different diameters respectively.
  • the openings are circular shaped respectively.
  • the diameters of the openings are not greater than 1.2 mm respectively.
  • the cross sections of the openings are respectively constant along a thickness direction.
  • the center-to-center distances between the openings of two or more than two regions are different from each other.
  • the center-to-center distances between the openings are not greater than 1.7 mm respectively.
  • the openings of one or more than one region form patterns of isosceles triangles respectively.
  • the openings of one or more than one region form patterns of equilateral triangles respectively.
  • the openings of one or more than region form random patterns respectively.
  • the present invention provides a fine filter which has an improved filtration performance.
  • the fine filter has been prevented from entirely clogging. Consequently, a continual drainage of the wash fluid into the sump can be secured.
  • the pump can be supplied with a sufficient amount of wash fluid so that the overall circulation process performed by the hydraulic circuit can be prevented from stopping. Owing to the stable flow of the wash fluid, a protective shut-off of the heater can be prevented and the heating process can be efficiently conducted.
  • the fine filter of the present invention the washing results are positively influenced.
  • Figure 1 – is a schematic top view of a fine filter according to an embodiment of the present invention, wherein the openings have been shown only partly;
  • Figure 2 – is a schematic cross sectional view of the fine filter shown in Fig. 1, taken along the line A-A;
  • Figure 3 – is a schematic side view of the fine filter shown in Fig.1;
  • Figure 4 – is another schematic side view of the fine filter shown in Fig.1.
  • T1 First material thickness
  • T2 Second material thickness
  • P1 First percentage of open area
  • P2 Second percentage of open area
  • the fine filter (1) is suitable for use in a dishwasher (not shown).
  • the fine filter (1) comprises an aperture (2) for removably attaching a filter assembly which includes a coarse filter and a micro filter and a filter surface (3) for filtering a wash fluid (Figs. 1 to 4).
  • the filter surface (3) has plurality of regions (4, 4a, 4b) which are circumferentially arranged around the aperture (2).
  • the plurality of regions (4, 4a, 4b) comprise a first region (4a) into which a plurality of openings (5) are formed and a second region (4b) into which a plurality of openings (5) are formed.
  • the first region (4a) has a first material thickness T1 and a first percentage of open area P1 which is defined through a total surface area of the openings (5) in the first region (4a) divided by a total surface area of the first region (4a).
  • the second region (4b) has a second material thickness T2 and a second percentage of open area P2 which is similarly defined through a total surface area of the openings (5) in the second region (4b) divided by a total surface area of the second region (4b).
  • T1 and T2 are different from each other and/or P1 and P2 are different from each other.
  • the first material thickness T1 and the second material thickness T2 are not greater than 1.2 mm respectively. Reducing the material thickness increases the filtration performance. The filtration performance is effectively enhanced when the material thicknesses are equal to or lower than 1.2 mm.
  • a first percentage of open area P1 and a second percentage of open area P2 are not less than 40 % respectively.
  • the filtration performance increases when the percentage of an open area is high.
  • the filtration performance is effectively enhanced when the percentage of an open area is equal to or larger than % 35.
  • all regions of the filter surface (3), including the first region (4a) and the second region (4b) have a percentage of open area which equals to 41% respectively.
  • the openings (5) of the first region (4a) and the openings (5) of the second region (4b) have a same shape and a same size respectively.
  • the openings (5) of the first region (4a) and the openings (5) of the second region (4b) have a same shape but different size respectively.
  • the openings (5) of the first region (4a) and the openings (5) of the second region (4b) are circular shaped respectively (Fig. 1).
  • a diameter of the openings (5) of the first region (4a) and a diameter of the openings (5) of the second region (4b) are not greater than 1.2 mm respectively.
  • the filtration performance is effectively enhanced when the diameter of the openings (5) is equal to or smaller than 1.2 mm.
  • a cross section of the openings (5) of the first region (4a) and a cross section of the openings (5) of the second region (4b) are respectively constant along a thickness direction (Fig. 2)
  • a center-to-center distance between the openings (5) of the first region (4a) and a center-to-center distance between the openings (5) of the second region (4b) are different from each other.
  • a center-to-center distance between the openings (5) of the first region (4a) and a center-to-center distance between the openings (5) of the second region (4b) are not greater than 1.7 mm respectively.
  • the number of openings (5) can be increased by reducing the distance between the openings (5).
  • the filtration performance is effectively enhanced when the center-to-center distance between the openings (5) is equal to or smaller than 1.7 mm.
  • the openings (5) of the first region (4a) and the openings (5) of the second region (4b) are arranged at the vertices of imaginary isosceles triangles respectively (Fig. 1).
  • the openings (5) of the first region (4a) and the openings (5) of the second region (4b) are arranged at the vertices of imaginary equilateral triangles respectively.
  • the openings (5) of the first region (4a) and the openings (5) of the second region (b) are randomly arranged respectively.
  • the fine filter (1) comprises a frame (6) and a plurality of reinforcement ribs (7) which support the filter surface (3).
  • the filter surface (3) is made from plastic.
  • the filter surface (3) is made from metal.
  • the present invention also provides a dishwasher (not shown) comprising a washing tub, spray arms which are rotatably arranged into the washing tub, a sump for collecting wash fluid and a pump for conveying the wash fluid to the spray arms via conduits.
  • a dishwasher (not shown) comprising a washing tub, spray arms which are rotatably arranged into the washing tub, a sump for collecting wash fluid and a pump for conveying the wash fluid to the spray arms via conduits.
  • the dishwasher of the present invention has a fine filter (1) which is configured to completely cover the sump.
  • the present invention provides a fine filter (1) which has an improved filtration performance.
  • the fine filter (1) has been prevented from entirely clogging. Consequently, a continual drainage of the wash fluid into the sump can be secured.
  • the pump can be supplied with a sufficient amount of wash fluid so that the overall recirculation process performed by the hydraulic circuit can be prevented from degrading. Owing to the stable flow of the wash fluid a protective shut-off of the heater can be prevented and the heating process can be efficiently conducted.
  • the fine filter (1) of the present invention the washing results are positively influenced.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Abstract

La présente invention concerne un filtre fin (1) destiné à être utilisé dans un lave-vaisselle. Le filtre fin (1) comporte une ouverture (2) pour fixer de façon amovible un ensemble filtre qui comprend un filtre grossier et un micro-filtre, et une surface de filtre (3) pour filtrer un fluide de lavage. Dans le filtre fin (1) selon la présente invention, la surface de filtre (3) possède une pluralité de régions (4, 4a, 4b) qui sont disposées de façon circonférentielle autour de l'ouverture (2).
PCT/EP2014/053931 2014-02-28 2014-02-28 Filtre fin ayant une efficacité de filtration améliorée, destiné à être utilisé dans un lave-vaisselle et lave-vaisselle le comprenant WO2015127982A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/053931 WO2015127982A1 (fr) 2014-02-28 2014-02-28 Filtre fin ayant une efficacité de filtration améliorée, destiné à être utilisé dans un lave-vaisselle et lave-vaisselle le comprenant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/053931 WO2015127982A1 (fr) 2014-02-28 2014-02-28 Filtre fin ayant une efficacité de filtration améliorée, destiné à être utilisé dans un lave-vaisselle et lave-vaisselle le comprenant

Publications (1)

Publication Number Publication Date
WO2015127982A1 true WO2015127982A1 (fr) 2015-09-03

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PCT/EP2014/053931 WO2015127982A1 (fr) 2014-02-28 2014-02-28 Filtre fin ayant une efficacité de filtration améliorée, destiné à être utilisé dans un lave-vaisselle et lave-vaisselle le comprenant

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WO (1) WO2015127982A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0178202A1 (fr) * 1984-09-11 1986-04-16 Esswein S.A. Lave-vaisselle à microfiltrage de liquide
DE8806418U1 (de) * 1987-06-05 1988-08-18 Zanussi Grandi Impianti S.p.A., Pordenone Geschirrspülmaschine mit Filter für die Arbeitsflüssigkeit
US5779812A (en) * 1995-08-25 1998-07-14 Whirlpool Corporation Multi-mesh mechanical filter screen system for dishwashers
DE19841354A1 (de) * 1998-09-10 2000-03-16 Aeg Hausgeraete Gmbh Filtersieb für ein flüssigkeitführendes Haushaltsgerät
EP1340448A2 (fr) * 2002-02-28 2003-09-03 Whirlpool Corporation Filtre plat pour un appareil conducteur d'eau, notamment un lave-vaisselle
EP1424034A1 (fr) * 2002-11-28 2004-06-02 Whirlpool Corporation Lave-vaisselle comportant un filtre plat ayant des zones avec des trous de différents diamètres
US20080190464A1 (en) * 2005-04-05 2008-08-14 Electrolux Home Products Corporation N.V. Sieve Element For A Dishwasher
US20120024768A1 (en) * 2010-07-28 2012-02-02 BSH Bosch und Siemens Hausgeräte GmbH Water-conducting household appliance, in particular a dishwasher
DE102011084119A1 (de) * 2011-10-07 2013-04-11 BSH Bosch und Siemens Hausgeräte GmbH Flachsieb für eine Geschirrspülmaschine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0178202A1 (fr) * 1984-09-11 1986-04-16 Esswein S.A. Lave-vaisselle à microfiltrage de liquide
DE8806418U1 (de) * 1987-06-05 1988-08-18 Zanussi Grandi Impianti S.p.A., Pordenone Geschirrspülmaschine mit Filter für die Arbeitsflüssigkeit
US5779812A (en) * 1995-08-25 1998-07-14 Whirlpool Corporation Multi-mesh mechanical filter screen system for dishwashers
DE19841354A1 (de) * 1998-09-10 2000-03-16 Aeg Hausgeraete Gmbh Filtersieb für ein flüssigkeitführendes Haushaltsgerät
EP1340448A2 (fr) * 2002-02-28 2003-09-03 Whirlpool Corporation Filtre plat pour un appareil conducteur d'eau, notamment un lave-vaisselle
EP1424034A1 (fr) * 2002-11-28 2004-06-02 Whirlpool Corporation Lave-vaisselle comportant un filtre plat ayant des zones avec des trous de différents diamètres
US20080190464A1 (en) * 2005-04-05 2008-08-14 Electrolux Home Products Corporation N.V. Sieve Element For A Dishwasher
US20120024768A1 (en) * 2010-07-28 2012-02-02 BSH Bosch und Siemens Hausgeräte GmbH Water-conducting household appliance, in particular a dishwasher
DE102011084119A1 (de) * 2011-10-07 2013-04-11 BSH Bosch und Siemens Hausgeräte GmbH Flachsieb für eine Geschirrspülmaschine

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