EP1040786B1 - Lave-vaiselle avec un jet d'eau pulsé - Google Patents

Lave-vaiselle avec un jet d'eau pulsé Download PDF

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Publication number
EP1040786B1
EP1040786B1 EP00102533A EP00102533A EP1040786B1 EP 1040786 B1 EP1040786 B1 EP 1040786B1 EP 00102533 A EP00102533 A EP 00102533A EP 00102533 A EP00102533 A EP 00102533A EP 1040786 B1 EP1040786 B1 EP 1040786B1
Authority
EP
European Patent Office
Prior art keywords
dishwashing machine
spraying means
water
water spray
spray jets
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.)
Expired - Lifetime
Application number
EP00102533A
Other languages
German (de)
English (en)
Other versions
EP1040786A1 (fr
Inventor
Ugo Favret
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.)
Electrolux Home Products Italy SpA
Original Assignee
Electrolux Home Products Italy 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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Application filed by Electrolux Home Products Italy SpA filed Critical Electrolux Home Products Italy SpA
Publication of EP1040786A1 publication Critical patent/EP1040786A1/fr
Application granted granted Critical
Publication of EP1040786B1 publication Critical patent/EP1040786B1/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
    • A47L15/4278—Nozzles
    • A47L15/4282—Arrangements to change or modify spray pattern or direction

Definitions

  • the present invention relates to a dishwashing machine with pulsed washing water spray jets, which is capable of enabling energy usage in general to be reduced drastically.
  • a dishwashing machine of the above cited kind is known from US-A-5 525 161, in which the rotating spray arms are supplied by a circulation pump so as to issue, towards the dishes to be washed, respective pulsed water spray jets, ie. with an alternating sequence of periods and pauses in which the pressure of the water supplying said rotating spray arms is at its highest and its lowest value, respectively.
  • the rotating spray arms issue low-pressure water spray jets so as to keep up an adequate operating effectiveness of the machine and lower the overall water-generated noise thereof.
  • dishwashing machines generally comprise an upper rack and a lower rack, below which there is arranged an associated rotating spray arm with main nozzles adapted to issue washing water spray jets directed upwards.
  • at least one of said rotating spray arms also comprises auxiliary nozzles adapted to issue water spray jets that are directed downwards. This is normally applied to the upper rotating spray arm, in view of ensuring a more accurate and thorough washing effect on the washload items arranged in the lower rack.
  • the lower rotating spray arm may (alternatively or additionally) be adapted to issue auxiliary water spray jets that are directed downwards, for instance in view of bringing about a washing action aimed at automatically cleaning the filtering means provided on the bottom of the washing vessel of the machine.
  • the auxiliary water spray jets turn out to be substantially ineffective and practically constitute respective water losses, or leakages, that further reduce the pressure of the main water spray jets.
  • these main water spray jets lose much of their efficiency during said low-pressure operating pauses, under resulting reduction in the overall performance of the machine.
  • the dishwashing machine comprises mainly a washing vessel 5, in which there are accommodated, for supporting the washload items, at least an upper rack 6 and preferably at least a lower rack 7.
  • Said racks 6 and 7 are associated to respective spraying means that preferably comprise hollow rotating spray arms 8 and 9 arranged therebelow. These rotating spray arms are provided with a plurality of main spray nozzles 10 adapted to eject respective washing water spray jets towards the respective racks, as this will be described in greater detail further on.
  • At least one of these rotating spray arms 8, 9 also comprises at least an auxiliary nozzle 12 adapted to eject a respective water spray jet, as this will be better explained further on.
  • auxiliary nozzles 12 are provided in the upper rotating spray arm 8 to the purpose of ejecting water spray jets that are directed against the lower rack 7 arranged therebelow.
  • one or more auxiliary nozzles 12 may be provided also in the lower rotating spray arm 9 to the purpose of ejecting water spray jets which may for instance be directed towards the filtering means 11 of the machine, so as to clean them automatically.
  • a particular alternative embodiment which is not shown in the Figures owing to reasons of greater simplicity, is known for instance from US-A-4 972 861.
  • the rotating spray arms 8, 9 are supplied with water which is delivered under pressure by a circulation pump 13, which is adapted to be operated in the manner as substantially described in the afore cited publication US-A-5 525 161 so as to ensure that the pressure of the water supplying the rotating spray arms 8, 9 is variable between a highest value and a lowest value during an alternating sequence of operating periods and pauses, respectively.
  • each rotating spray arm that is so provided with main nozzles 10 and auxiliary nozzles 12 (ie. the rotating spray arm 8 in the example described here) comprises control means adapted to substantially shut off the auxiliary nozzles 12 during said operating pauses, ie. when the same rotating spray arm is supplied, in correspondence of an inlet port 16 thereof connected to the pump 13, with water having the afore cited lowest pressure value.
  • control means are adapted to be operated hydraulically in an automatic manner and, to such a purpose, a partition wall 17 may be provided so as to substantially divide the interior of the rotating spray arm 8 into two distinct chambers 18 and 19.
  • the chamber 18 communicates normally with the inlet port 16 and the main nozzles 10, whereas the chamber 19 communicates normally with the auxiliary nozzles 12 only.
  • the two chambers 18 and 19 of the rotating spray arm 8 are adapted to communicate with each other through at least a passage 20 that is normally shut by a valve arrangement 21.
  • the latter comprises substantially a shutter 14 that is loaded by a compression spring 15, or the like, which keeps it normally in its position in which it shuts the passage 20, as this is shown in Figure 3.
  • the spring 15 is so sized as to make it possible for the pushing force thereof to be overcome when, during the afore cited operating periods, the rotating spray arm 8 receives, at the inlet port 16 thereof, water at its highest pressure value, which therefore is capable of acting with an adequately great pressure on said shutter 14.
  • the same shutter 14 is thereby caused to switch over to a position in which it opens the passage 20 ( Figure 4), through which said chambers 18 and 19 are then able to communicate with each other.
  • the water supplying the inlet port 16 of the rotating spray arm 8 is then delivered to both the main nozzles 10 and the auxiliary nozzles 12, which are in this way to issue respective water spray jets at an adequate pressure ( Figure 2).
  • the lower pressure of the water at the inlet port 16 of the rotating spray arm 8 is substantially compensated for by the smaller overall passage or flow-through cross-section area of the nozzles that are to be supplied by the same water, ie. the main nozzles 10 only.
  • valve arrangement 21 it may prove advantageous for the valve arrangement 21 to be adapted so that, during said operating pauses, it actually shuts off the main nozzles 10, instead of the auxiliary nozzles 12, for example in view of ensuring a more thorough cleaning of the washload items arranged on the lower rack 7 only.
  • the valve arrangement 21 it may prove advantageous for the valve arrangement 21 to be adapted so that, during said operating pauses, it actually shuts off the main nozzles 10, instead of the auxiliary nozzles 12, for example in view of ensuring a more thorough cleaning of the washload items arranged on the lower rack 7 only.
  • both the main nozzles 10 and the auxiliary nozzles 12 may be provided on the same side of the rotating spray arm 8, so as to cause them to eject respective water spray jets that are in all cases directed against the upper rack 6, for instance.
  • the washload items arranged on the rack 6 normally showered by all of the nozzles 10, 12 during said operating periods, while being showered to an adequate extent of effectiveness by either the nozzles 10 only or the nozzles 12 only during said operating pauses.
  • the present invention may be advantageously applied also to a dishwashing machine in which the rotating spray arms 8, 9 are supplied alternately, as described for instance in EP-B-0 237 994.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Claims (4)

  1. Machine à laver la vaisselle, comprenant une cuve de lavage dans laquelle sont placés au moins un panier contenant les articles à laver, ainsi que des moyens de pulvérisation (8, 9) ayant au moins une buse principale (10) et au moins une buse auxiliaire (12) adaptée pour envoyer des jets d'eau respectifs, lesdits moyens de pulvérisation étant alimentés par une pompe de circulation (13) adaptée pour une séquence alternée de périodes de fonctionnement et de pauses au cours desquelles la pression de l'eau alimentant lesdits moyens de pulvérisation est respectivement à sa valeur maximale et. à sa valeur minimale, dans laquelle lesdits moyens de pulvérisation (8, 9) comprennent de plus des moyens de contrôle (21) adaptés pour arrêter substantiellement ladite buse auxiliaire (12), ou ladite buse principale (10) seulement durant lesdites pauses de fonctionnement.
  2. Machine à laver la vaisselle selon la revendication 1, caractérisée en ce que lesdits moyens de contrôle (21) sont adaptés pour être actionnés hydrauliquement par l'eau alimentant lesdits moyens de pulvérisation (8 , 9).
  3. Machine à laver la vaisselle selon la revendication 1, caractérisée en ce que lesdits moyens de contrôle comprennent un système de vanne (21) adapté pour fermer normalement un passage (20) prévu dans une cloison (17) qui délimite à l'intérieur des moyens de pulvérisation (8, 9) une première chambre (18) qui communique avec ladite buse principale (10), et une deuxième chambre (19) qui communique avec ladite buse auxiliaire (12), le système de vanne (21) étant adapté pour commuter ledit passage (20) dans sa position ouverte quand les moyens de pulvérisation (8 , 9) sont alimentés en eau à sa pression maximale durant lesdites périodes de fonctionnement.
  4. Machine à laver la vaisselle selon la revendication 3, caractérisée en ce que ledit système de vanne (21) comprend un obturateur (14) chargé par un ressort (15) qui le maintient normalement dans une position dans laquelle il ferme ledit passage (20).
EP00102533A 1999-03-29 2000-02-07 Lave-vaiselle avec un jet d'eau pulsé Expired - Lifetime EP1040786B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPN990032 1999-03-29
IT1999PN000032A IT1311214B1 (it) 1999-03-29 1999-03-29 Lavastoviglie con getti d'acqua pulsanti

Publications (2)

Publication Number Publication Date
EP1040786A1 EP1040786A1 (fr) 2000-10-04
EP1040786B1 true EP1040786B1 (fr) 2004-09-01

Family

ID=11395508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00102533A Expired - Lifetime EP1040786B1 (fr) 1999-03-29 2000-02-07 Lave-vaiselle avec un jet d'eau pulsé

Country Status (3)

Country Link
EP (1) EP1040786B1 (fr)
DE (1) DE60013345T2 (fr)
IT (1) IT1311214B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1731081A2 (fr) 2005-06-08 2006-12-13 Miele & Cie. KG Lave-vaisselle
US11471898B2 (en) 2015-11-18 2022-10-18 Fdx Fluid Dynamix Gmbh Fluidic component

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2402550T3 (es) * 2004-01-29 2013-05-06 Arçelik Anonim Sirketi Lavavajillas y procedimiento de control
DE102004018878B4 (de) * 2004-04-15 2006-01-05 Miele & Cie. Kg Geschirrspülmaschine mit einem Spülbehälter in dem wenigstens ein Sprüharm angeordnet ist
DE102006012080A1 (de) * 2006-03-14 2007-09-27 Miele & Cie. Kg Spülmaschine
DE102006021954B3 (de) * 2006-05-10 2007-09-13 Miele & Cie. Kg Verfahren zur Durchführung eines Spülprogramms in einer Spülmaschine
US8349089B2 (en) * 2008-11-07 2013-01-08 Whirlpool Corporation Dishwasher having dedicated sprayer for silverware basket
US8210191B2 (en) * 2008-12-09 2012-07-03 General Electric Company Dishwasher having multi-mode spray arm system
US8734588B2 (en) * 2010-05-03 2014-05-27 Bsh Home Appliances Corporation Dishwasher with improved cleaning effect
PL2522268T3 (pl) 2011-05-12 2014-10-31 Lg Electronics Inc Zmywarka do naczyń
US9492055B2 (en) 2011-09-22 2016-11-15 Whirlpool Corporation Dishwasher with spray system
US9414736B2 (en) 2011-09-22 2016-08-16 Whirlpool Corporation Dishwasher with directional spray
US9375128B2 (en) 2011-09-22 2016-06-28 Whirlpool Corporation Dishwasher with spray system
US9693672B2 (en) 2011-09-22 2017-07-04 Whirlpool Corporation Dishwasher with sprayer
US9295368B2 (en) 2013-03-01 2016-03-29 Whirlpool Corporation Dishwasher with hydraulically driven sprayer
US9532701B2 (en) * 2013-03-01 2017-01-03 Whirlpool Corporation Dishwasher with sprayer
KR101998571B1 (ko) * 2013-05-21 2019-07-10 삼성전자주식회사 노즐 어셈블리 및 이를 구비하는 식기세척기
US9713413B2 (en) 2013-07-01 2017-07-25 Whirlpool Corporation Dishwasher for treating dishes
US9532699B2 (en) 2013-07-15 2017-01-03 Whirlpool Corporation Dishwasher with sprayer
CA2927843A1 (fr) 2013-12-20 2015-06-25 Electrolux Appliances Aktiebolag Agencement pour un lave-vaisselle permettant de creer une zone de lavage dont la position peut etre selectionnee
CA2927421A1 (fr) * 2013-12-20 2015-06-25 Electrolux Appliances Aktiebolag Amenagement pour former une zone de lavage
EP3082552B1 (fr) * 2013-12-20 2021-11-03 Electrolux Appliances Aktiebolag Agencement dans un lave-vaisselle permettant de créer une zone de lavage à lavage intensifié
WO2017088935A1 (fr) * 2015-11-27 2017-06-01 Electrolux Appliances Aktiebolag Dispositif de régulation de débit et lave-vaisselle comportant un dispositif de régulation de débit
DE102017207990B4 (de) * 2017-05-11 2020-07-30 Haier Deutschland GmbH Schaltbarer Flüssigkeitsausbringer mit Federelement
CN107997713A (zh) * 2017-12-05 2018-05-08 杨公民 一种通用型自循环酒店餐具清洗装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1143342B (it) * 1981-02-02 1986-10-22 Indesit Dispositivo commutatore automatico per l alimentazione dei collettori rotanti di una macchina lavastoviglie
IT1268535B1 (it) * 1993-12-20 1997-03-04 Zanussi Elettrodomestici Programma operativo per macchina lavastoviglie
DE19736919B4 (de) * 1997-08-25 2007-08-09 AEG Hausgeräte GmbH Geschirrspülmaschine mit mindestens einer Spülebene

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1731081A2 (fr) 2005-06-08 2006-12-13 Miele & Cie. KG Lave-vaisselle
US11471898B2 (en) 2015-11-18 2022-10-18 Fdx Fluid Dynamix Gmbh Fluidic component

Also Published As

Publication number Publication date
DE60013345T2 (de) 2005-02-17
DE60013345D1 (de) 2004-10-07
ITPN990032A0 (it) 1999-03-29
IT1311214B1 (it) 2002-03-04
ITPN990032A1 (it) 2000-09-29
EP1040786A1 (fr) 2000-10-04

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