WO2017114558A1 - Lave-vaisselle - Google Patents

Lave-vaisselle Download PDF

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Publication number
WO2017114558A1
WO2017114558A1 PCT/EP2015/081329 EP2015081329W WO2017114558A1 WO 2017114558 A1 WO2017114558 A1 WO 2017114558A1 EP 2015081329 W EP2015081329 W EP 2015081329W WO 2017114558 A1 WO2017114558 A1 WO 2017114558A1
Authority
WO
WIPO (PCT)
Prior art keywords
duct
washing liquid
aperture
dishwasher
sump
Prior art date
Application number
PCT/EP2015/081329
Other languages
English (en)
Inventor
Mehmet DIKSAN
Orhan Atabey
Mahmut Murat GOCMEN
Hasret GURSOY
Doruk TURGUL
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/EP2015/081329 priority Critical patent/WO2017114558A1/fr
Publication of WO2017114558A1 publication Critical patent/WO2017114558A1/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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4219—Water recirculation
    • A47L15/4221—Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms
    • 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
    • A47L15/421—Safety arrangements for preventing water damage
    • A47L15/4212—Detection of water leaks; Collection of leaked water, e.g. in the casing
    • 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
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4219—Water recirculation
    • 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

  • This invention relates to a dishwasher having improved efficiency, in particular with reference to the water usage, and improved washing performances.
  • dishwashers generally comprise a tub in which the dishes to be washed are placed and a hydraulic circuit for circulating washing liquid through the tub.
  • the hydraulic circuit is connectable to an external source of water and has an upper rotatable spray arm and a lower rotatable spray arm arranged in the tub to spray the dishes with the washing liquid, a sump which is arranged in the lower section of the tub to collect the washing liquid that has been sprayed on the dishes during washing operation, and ducts for conveying the filtered washing liquid from the sump to the spray arms.
  • the apertures are arranged on the lower wall of the duct, while according to a further embodiment they are arranged on the upper wall of the duct.
  • the hydraulic circuit comprises obstruction means arranged on the duct to obstruct the apertures when the washing liquid is intentionally introduced into the duct and it has, therefore, a pressure that exceeds a preset value.
  • the obstruction means comprises a flap mounted inside the duct, rotatably attached to its upper wall and movable between an open position in which it allows washing liquid to flow through the at least one aperture and a closed position in which it blocks the passage of washing liquid through the at least one aperture.
  • the obstruction element has a density which is higher than the density of the water.
  • the obstruction element is movable toward the open position by means of the pressure force of the washing liquid acting on it and exceeding the gravity force acting on it and it is movable toward the closed position by means of the pressure force of the washing liquid acting on it when such pressure force exceeds a preset value.
  • the obstruction means further comprises at least one elastically deformable element connected to the hollow element and to the obstruction element to keep the latter in the open position.
  • Figures 3 and 4 – are respectively a perspective view of a hydraulic circuit of a dishwasher according to the present invention and an enlarged particular thereof.
  • Figure 5 – is a perspective sectional view of a particular of a hydraulic circuit of a dishwasher of the present invention according to an embodiment.
  • Figure 6 – is a perspective sectional view of a particular of a hydraulic circuit of a dishwasher of the present invention according to a different embodiment.
  • Figure 9 – is an enlarged perspective view of a particular of the hydraulic circuit of Figures 7 and 9, with the flap in the open position.
  • Figure 11 – is a cross-sectional view of the hydraulic circuit of Figure 10.
  • Figures 12 and 13 – are an enlarged particular of the cross-sectional view of the hydraulic circuit of Figure 11 relative to obstructing means respectively in an open and in a closed position.
  • the dishwasher 1 comprises a tub 2 in which the dishes to be washed, i.e. dishes, kitchenware, tableware, crockery etc. to be washed, are placed, and a hydraulic circuit 3, connectable to an external source of water, for circulating washing liquid through the tub 2.
  • a tub 2 in which the dishes to be washed, i.e. dishes, kitchenware, tableware, crockery etc. to be washed, are placed, and a hydraulic circuit 3, connectable to an external source of water, for circulating washing liquid through the tub 2.
  • the hydraulic circuit 3 has at least a lower rotatable spray arm 4 and an upper rotatable spray arm 5 which are arranged in the tub 2 to spray the dishes with the washing liquid. More in detail, according to a preferred embodiment illustrated in Figure 1, the dishwasher 1 comprises a lower rack (not illustrated) and an upper rack 6 which are extendably disposed into the tub 2 one above the other to be loaded by the user with the dishes to be washed and which are associated respectively with the lower rotatable spray arm 4 and with the upper rotatable spray arm 5.
  • the hydraulic circuit 3 further comprises a sump 7 which is arranged in the lower section of the tub 2 to collect the washing liquid that has been sprayed on the dishes during washing operation, i.e. during the washing and rinsing steps that are performed in order to clean the dishes, and a first duct 8 and a second duct 9 for conveying the washing liquid from the sump 7 respectively to the lower spray arm 4 and to the upper spray arm 5.
  • a sump 7 which is arranged in the lower section of the tub 2 to collect the washing liquid that has been sprayed on the dishes during washing operation, i.e. during the washing and rinsing steps that are performed in order to clean the dishes
  • a first duct 8 and a second duct 9 for conveying the washing liquid from the sump 7 respectively to the lower spray arm 4 and to the upper spray arm 5.
  • the hydraulic circuit 3 comprises a screen filter 10 placed over the sump 7 to hold at least the coarser particles carried by the washing liquid and advantageously a further microfilter (not illustrated) arranged in the sump 7 to hold the finer particles and soil.
  • the screen filter 10 and microfilter allow to prevent the dirt from getting into the circulation during washing, which dirt would decrease the effectiveness of washing.
  • the dishwasher 1 further comprises a circulation pump (not illustrated), arranged on the hydraulic circuit 3 downward of the sump 7, with respect to the flowing direction of the washing liquid in the hydraulic circuit 3, to draw the washing liquid from the sump 7 toward the lower and upper spray arms 4 and 5 respectively through the first and second duct 8 and 9.
  • a circulation pump (not illustrated), arranged on the hydraulic circuit 3 downward of the sump 7, with respect to the flowing direction of the washing liquid in the hydraulic circuit 3, to draw the washing liquid from the sump 7 toward the lower and upper spray arms 4 and 5 respectively through the first and second duct 8 and 9.
  • the second duct 9 has one or more apertures 11 for discharging into the sump 7 the washing liquid accidentally conveyed into it, thus reintroducing such washing liquid in the recirculation.
  • the presence of the aperture or apertures 11 on the second duct 9 ensures that substantially all the washing liquid directed to the lower spray arm 4 actually reaches it, thus improving the washing performances of the latter and more in general of the dishwasher 1 and entailing a better exploitation of the water introduced in the tub 2 for the washing operation. Moreover, by maintaining the whole volume of washing liquid recirculating and avoiding the accumulation of washing liquid in the second duct 9, malfunctioning of the circulation pump are avoided.
  • the aperture (or apertures) 11 is arranged over the sump 7, i.e. more clearly on a portion of the second duct 9 that is positioned above the sump 7, in order for the washing liquid accidentally conveyed into the second duct 9 to be discharged directly into the sump 7.
  • the aperture (or apertures) 11 such arranged allows the washing liquid to drop from the second duct 9 directly into the sump 7, thus favoring its reintroduction in the recirculation.
  • the screen filter 10 placed over the sump 7 has one or more through holes 12 arranged below the aperture (or apertures) 11 of the second duct 9 for allowing the washing liquid discharged from it to be directly introduced into the sump 7.
  • the presence of the through holes 12 on the screen filter 10 allows a more quick reintroduction of the washing liquid dropping off the second duct 9 in the sump 7 and hence in the recirculation.
  • the dishwasher 1 comprises a bottom wall 13, two lateral walls 14 and a rear wall 14 delimiting, together with an upper wall and a frontal door, the tub 2.
  • the sump 7 is mounted underneath an opening on the bottom wall 13 and the screen filter 10 is mounted on the bottom wall 13 over the sump 7.
  • the second duct 9 comprises a lower portion 16, which is advantageously essentially horizontal and which extends substantially parallel to the bottom wall 13 and an upper portion 17, which is advantageously essentially vertical and which extends substantially parallel to one of the lateral walls 14 or to the rear wall 15.
  • the aperture (or apertures) 11 are arranged on the lower portion 16 of the second duct 9. This allows the washing liquid that drops off the second duct 9 to be more quickly and easily collected in the sump 7.
  • the aperture 11 or the apertures 11 are arranged on the lower wall 19 of the lower portion 16 of the second duct 9, so that the washing liquid accidentally conveyed into the second duct 9 can easily be expelled through the apertures, by flowing through them due to gravity.
  • the higher pressure of the liquid allows only a negligible part of the washing liquid to be expelled from the second duct 9 through the aperture 11 or the apertures 11.
  • the hydraulic circuit 3 comprises obstruction means 20 arranged on the second duct 9 and designed to obstruct the aperture or apertures 11 when the washing liquid flowing into the second duct 9 has a pressure that exceeds a preset value, such as when pressurized washing liquid is intentionally conveyed into the second duct 9.
  • the obstruction means 20 further ensures that no washing liquid is expelled from the second duct 9 when intentionally conveyed into it, while allowing low pressure washing liquid, such as the washing liquid entering into the second duct 9 due to leakage phenomena, to be expelled from the second duct 9.
  • the obstruction means 20 comprises a flap 21 mounted inside the second duct 9, rotatably attached to the upper wall 18 of the lower portion 16 of the second duct 9, upstream of the aperture or apertures 11 with respect to the flow direction of the washing liquid into the second duct 9.
  • the flap 21 is movable between an open position O, illustrated in Figure 8, in which it allows washing liquid to flow through the aperture or apertures 11 to exit the second duct 9, and a closed position C, illustrated in Figure 7, in which it blocks the passage of washing liquid through the aperture or apertures 11, by covering them.
  • the flap 21 is preferably hinged to the upper wall 18.
  • the flap 21 is movable toward the open position O by means of the gravity force acting on it and it is movable toward the closed position C by means of the pressure force of the washing liquid flowing into the second duct 9 acting on it and, more specifically on a face of the flap 21.
  • the pressure exerted by the washing liquid on the flap 21 is not sufficient to overcome the gravity force acting on it and keeping hence the flap 21 in the open position O so that the washing liquid can penetrates between the second duct 9 and the flap 21 and into the aperture or apertures 11 and escape through the latter.
  • the second duct 9 has a plurality of apertures 11 and the flap 21 is designed to cover all the apertures 11 when in the closed position C, as illustrated in the attached Figures 7-9.
  • the obstruction means 20 may differently comprise more than one flap 21 to close all the apertures 11, without departing from the scope of the present invention.
  • the second duct 9 has one aperture 11 and the obstruction means 20 comprises a hollow element 23 defining, together with a portion of the second duct 9, a displacing chamber 24, arranged on the upper wall 18 of the lower portion 16 of the second duct 9 in correspondence of the aperture 11 and having an opening 25 aligned with the aperture 11, in particular arranged below or above the aperture 11.
  • the obstruction means 20 further comprises an obstruction element 26, such as in particular a ball as illustrated in the attached figures, arranged in the displacing chamber 24, having dimensions, and in particular the diameter in the case of the ball, bigger than the dimensions of the aperture 11 and of the opening 25 so as to be movable within the displacing chamber 24 but trapped into it without possibility to be expelled through the aperture 11 or the opening 25.
  • the obstruction element 26 is displaceable within the displacing chamber 24 between an open position O in which it allows washing liquid to flow through the aperture 11 and the opening 25 to exit the second duct 9, and a closed position C in which it blocks the passage of washing liquid through the aperture 11 or the opening 25, by covering one or the other.
  • the hollow element 23 is arranged on the upper wall 18 externally of the second duct 9, with its opening 25 above the aperture 11. This allows not to reduce the transversal section of the second duct 9 in correspondence of the obstruction means 20. Differently, the hollow element 23 could be arranged internally of the second duct 9, with its opening 25 below the aperture 11.
  • the obstruction element 26 has a density which is higher than the density of the water so that it does not float on the water or on the washing liquid, whose density is substantially equal to the density of the water.
  • the obstruction element 26 is movable toward the open position O by means of the pressure force of the washing liquid acting on it and exceeding the gravity force acting on it and it is movable toward the closed position C by means of the pressure force of the washing liquid acting on it when such pressure force exceeds a preset value. More clearly the obstruction element 26 is designed so as to be displaceable in the displacing chamber 24, and in particular to be removable from the aperture 11 in the embodiment illustrated in the attached Figures 10-14, but not to be pressed against the opening 25, by means of the pressure applied by low pressure washing liquid, as the washing liquid entering into the second duct 9 due to leakage phenomena. The obstruction element 26 is moreover designed in order to be pressed against the opening 25 by means of the pressure force applied by higher pressure washing liquid, as the washing liquid intentionally conveyed into the second duct 9.
  • the obstruction means 20 further comprises one or more elastically deformable elements 27, such as one or more springs, connected to the hollow element 23 and to the obstruction element 26 to keep the latter in the open position O.
  • one or more elastically deformable elements 27, such as one or more springs connected to the hollow element 23 and to the obstruction element 26 to keep the latter in the open position O.
  • the obstruction element 26 is movable toward the closed position C by means of the pressure force of the washing liquid acting on it when such pressure force exceeds the elastic restoring force of the at elastically deformable element or elements 27. This helps the low pressure washing liquid introduced in the second duct 9 due to leakage to exit the second duct 9, since no pressure force is requested for displacing the obstruction element 26 toward the open position O, moving it from the aperture 11, and for allowing hence the washing liquid to penetrates through the aperture 11 and the opening 25.
  • the dishwasher 1 according to the invention allows therefore to efficiently use, during the different phases of the washing operation, the whole volume of water introduced into the tub 2, preventing the dispersion of fractions of this volume of water due to leakage phenomena.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)

Abstract

La présente invention concerne un lave-vaisselle (1) comprenant : - une cuve (2) dans laquelle la vaisselle à laver est placée ; - un circuit hydraulique (3) pour faire circuler un liquide de lavage à travers la cuve (2), pouvant être relié à une source d'eau externe, et ayant au moins un bras de pulvérisation rotatif inférieur (4) et un bras de pulvérisation rotatif supérieur (5) disposés dans la cuve (2) pour pulvériser la vaisselle avec le liquide de lavage, un puisard (7) qui est disposé dans la section inférieure de la cuve (2) pour collecter le liquide de lavage qui a été pulvérisé sur la vaisselle pendant l'opération de lavage, un premier conduit (8) et un second conduit (9) pour transporter le liquide de lavage du puisard (7) au bras de pulvérisation inférieur (4) et au bras de pulvérisation supérieur (5), respectivement ; et - une vanne disposée sur le circuit hydraulique (3) pour permettre la distribution sélective du liquide de lavage du puisard (7) au premier conduit (8) vers le bras de pulvérisation inférieur (4) ou au second conduit (9) vers le bras de pulvérisation supérieur (5).
PCT/EP2015/081329 2015-12-29 2015-12-29 Lave-vaisselle WO2017114558A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2015/081329 WO2017114558A1 (fr) 2015-12-29 2015-12-29 Lave-vaisselle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2015/081329 WO2017114558A1 (fr) 2015-12-29 2015-12-29 Lave-vaisselle

Publications (1)

Publication Number Publication Date
WO2017114558A1 true WO2017114558A1 (fr) 2017-07-06

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ID=55027769

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/081329 WO2017114558A1 (fr) 2015-12-29 2015-12-29 Lave-vaisselle

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WO (1) WO2017114558A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3473156A1 (fr) * 2017-10-18 2019-04-24 Miele & Cie. KG Lave-vaisselle
WO2021190946A1 (fr) 2020-03-27 2021-09-30 BSH Hausgeräte GmbH Lave-vaisselle ménager

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1543759A2 (fr) * 2003-12-19 2005-06-22 Lg Electronics Inc. Dispositif d'alimentation d'eau d'un lave-vaisselle
US20050133070A1 (en) * 2003-06-17 2005-06-23 Vanderroest Chad T. Dishwasher having valved third-level sprayer
US20080163904A1 (en) * 2004-07-19 2008-07-10 Gab Kyu Hwang Nozzle Structure of Dish Washer
US20100147337A1 (en) * 2008-12-11 2010-06-17 Samsung Electronics Co., Ltd Dish washing machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050133070A1 (en) * 2003-06-17 2005-06-23 Vanderroest Chad T. Dishwasher having valved third-level sprayer
EP1543759A2 (fr) * 2003-12-19 2005-06-22 Lg Electronics Inc. Dispositif d'alimentation d'eau d'un lave-vaisselle
US20080163904A1 (en) * 2004-07-19 2008-07-10 Gab Kyu Hwang Nozzle Structure of Dish Washer
US20100147337A1 (en) * 2008-12-11 2010-06-17 Samsung Electronics Co., Ltd Dish washing machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3473156A1 (fr) * 2017-10-18 2019-04-24 Miele & Cie. KG Lave-vaisselle
WO2021190946A1 (fr) 2020-03-27 2021-09-30 BSH Hausgeräte GmbH Lave-vaisselle ménager
DE102020204010A1 (de) 2020-03-27 2021-09-30 BSH Hausgeräte GmbH Haushalts-Geschirrspülmaschine
DE102020204010B4 (de) 2020-03-27 2024-06-20 BSH Hausgeräte GmbH Haushalts-Geschirrspülmaschine

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