EP2624739A2 - Machine lave-vaisselle à cycles de lavage et procédé pour sa désinfection - Google Patents

Machine lave-vaisselle à cycles de lavage et procédé pour sa désinfection

Info

Publication number
EP2624739A2
EP2624739A2 EP11804790.1A EP11804790A EP2624739A2 EP 2624739 A2 EP2624739 A2 EP 2624739A2 EP 11804790 A EP11804790 A EP 11804790A EP 2624739 A2 EP2624739 A2 EP 2624739A2
Authority
EP
European Patent Office
Prior art keywords
tub
hygienization
cycle
wash
pump
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
EP11804790.1A
Other languages
German (de)
English (en)
Other versions
EP2624739B1 (fr
Inventor
Luca Bossi
Leonardo Arteconi
Annalisa Ciarletta
Paolo Faraldi
Sandro Duri
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.)
Whirlpool EMEA SpA
Original Assignee
Indesit Co 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 Indesit Co SpA filed Critical Indesit Co SpA
Priority to EP15192928.8A priority Critical patent/EP3000376B1/fr
Publication of EP2624739A2 publication Critical patent/EP2624739A2/fr
Application granted granted Critical
Publication of EP2624739B1 publication Critical patent/EP2624739B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • A47L15/0002—Washing processes, i.e. machine working principles characterised by phases or operational steps
    • A47L15/0015—Washing processes, i.e. machine working principles characterised by phases or operational steps other treatment phases, e.g. steam or sterilizing phase
    • 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
    • A47L15/4236—Arrangements to sterilize or disinfect dishes or washing liquids
    • A47L15/424—Arrangements to sterilize or disinfect dishes or washing liquids by using ozone
    • 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
    • A47L2601/00—Washing methods characterised by the use of a particular treatment
    • A47L2601/08—Ozone

Definitions

  • the present invention relates to a dishwashing machine with cleaning cycles according to the preamble of claim 1 and to a method of hygienization of said machine.
  • dishwashing machines derives from the fact that users often do not load the machine with a quantity of crockery sufficient to carry out a full-load wash cycle, with the consequence that it is often uneconomical to carry out a wash program in such conditions, in that it would imply a waste of energy, water and washing agents (rinse aid and detergents).
  • the present invention aims at overcoming these drawbacks.
  • One object of the present invention is a dishwashing machine according to the appended claim 1.
  • Another object of the present invention is a method of hygienization of a dishwashing machine according to claim 6.
  • the idea at the basis of the present invention is to diffuse an oxidizing gas, such as ozone, only during operating cycles wherein no liquid is dispensed into the tub; said operating cycles, having a hygienization function, can be carried out, for example, when dirty crockery is placed into the tub awaiting the start of a wash program.
  • This gas is, in fact, a strong oxidizing agent, and as such, when used in a dishwashing machine, it sterilizes and oxidizes organic substances, thereby eliminating the bad smells originating from the proliferation of bacteria inside the tub of the machine.
  • Other knpwn properties of ozone in this field relate to its whitening action, which can easily eliminate any tea or coffee stains from white cups or dishes.
  • Fig. 1 is a schematic view of a dishwashing machine according to the present invention
  • Fig. 1 there is shown a schematic view of a dishwashing machine according to the present invention.
  • It comprises a tub 2 in which crockery to be subjected to the machine's washing action is placed.
  • the crockery is arranged in sliding racks 3 that can be extracted through the opening the tub 2, which is closed by the horizontally-pivoted door 3.
  • rotary sprayers 4 which spray wash liquid (water, water and detergents and/or rinse aids or the like) onto the crockery during the wash cycles.
  • the wash liquid is supplied to the sprayers 4 through the hydraulic circuit 5, which connects them to the pump 6.
  • the wash liquid collects into the sump 7 at the bottom of the tub 2, from which it returns to the pump 6 through the duct 8 or is drained through the duct 9.
  • wash cycle refers to any operating step of the machine 1 wherein water or wash liquid is dispensed by the sprayers 4 or wherein, likewise, the pump 6 is on; during the wash cycles, the degree of humidity in the air inside the tub is normally higher than the degree of humidity in the air in the outside environment.
  • the machine 1 also comprises a cleaning circuit which comprises a duct 10 in fluidic communication with the sump 7, an ozone generator 1 1, an air pump 12 and an intake duct 13 that opens into the outside and takes in environmental air.
  • the duct 10 puts the sump (and therefore the inside of the tub 2) in fluidic communication with the ozone generator 1 1.
  • the latter is preferably of the so-called "corona discharge” type, such as those of the TCB-66, TCB-56 e TCB-1 15 series available from Trump Electronics.
  • the ozone generator 1 1 is supplied by the pump 12 with air taken from the environment through the intake duct 13.
  • the pump may likewise be a fan or the like.
  • valve 15 On the duct 10 that connects the generator 11 and the sump 7 there is optionally a valve 15, e.g. a non-return valve for liquids, which prevents the wash liquid from reaching the generator 1 1.
  • a solenoid valve or even a simple gate valve may be used, which is kept closed as the sump 7 is filling with liquid or during a wash cycle.
  • the method of operation according to the present invention provides for the execution of a hygienization program comprising at least one hygienization cycle wherein ozone is dispensed into the tub prior to one or more wash cycles.
  • the user can carry out the hygienization cycle to remove any bacteria, microbes and bad smells, and then wait until the machine can be completely filled.
  • the hygienization program is preferably distinct from the wash cycles: preferably, it is carried out prior to the latter, i.e. when the degree of humidity in the tub is approximately equal to the degree of humidity in the environment outside the tub.
  • Such a hygienization program therefore, dispenses no wash liquid or water, and the ozone diffusion medium is air. This improves the hygienic conditions of the crockery inside the tub; in fact, sometimes the presence of water in the tub (due, for example, to the execution of separate rinse cycles) might increase the diffusion of some types of bacteria or microbes, promoting the proliferation thereof and hence the onset of bad smells.
  • the hygienization cycle takes place before the execution of the wash cycles, in a condition wherein the degree of humidity in the air inside the tub is approximately equal to that in the environment outside the tub.
  • the term "hygienization cycle” refers to an operating step of the machine 1 wherein the pump 12 and the generator 11 are on. According to a variant of this method of operation, the hygienization cycle is carried out between two successive wash cycles.
  • a hygienization cycle is carried out during every interval between one wash cycle and the next.
  • the ozone diffusion medium is environmental air, not a liquid, and this allows to overcome the above-described drawbacks.
  • the operating program includes an initial step wherein, with the crockery loaded in the racks 3, water taken from the water mains (not shown) is supplied into the tub.
  • the water pump 6 is then turned on, while the air pump 12 remains off.
  • the water collected in the sump 7 inside the tub is delivered to the sprayers 4, to be sprayed onto the crockery.
  • Both the pump 12 and the generator 1 1 are kept off, and the selected wash cycle (in this case a prewash cycle) is started.
  • valve 15 is kept closed to prevent any water from reaching the ozone generator.
  • a hygienization cycle is then carried out, during which, with no liquid in the tub, the water pump 6 is kept off and the air pump 12 is turned on.
  • the ozone generator 11 is turned on as well and, if present, the valve 15 is opened.
  • the air taken in from the outside environment through the duct 13 flows past the pump 12 and reaches the ozone generator 11, where it is charged with ozone in accordance with a per se known method, which will not be described any further herein.
  • the air thus charged is the medium used for diffusing ozone in the tub: in fact, it is delivered into the latter through the duct 8 and through the sump 7, which in this operating condition contains no liquids.
  • this phase can be identified by measuring the degree of humidity in the air inside the tub, which is substantially equal to the degree of humidity in the outside environment.
  • ozone may be replaced with another gas or, more in general, with a fluid having the same effect, in particular an oxidizing gas, which will only require that the ozone generator 1 1 be replaced with a suitable generator of said gas or fluid.
  • a fan may also be used for improving ozone distribution in the tub.
  • said fan can be turned on to evenly distribute the ozone during the hygienization cycle.
  • Said fan is included in a closed circuit that takes air from the tub and recirculates it into the tub; it may be positioned, for example, in a duct external to the tub, so as to prevent any contact with the wash liquid.

Landscapes

  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)

Abstract

L'invention concerne un procédé d'hygiénisation d'une machine lave-vaisselle, ladite machine effectuant au moins un cycle de lavage dans lequel un liquide de lavage est distribué dans une cuve de ladite machine, comportant un programme d'hygiénisation qui comporte un cycle d'hygiénisation dans lequel un fluide oxydant est distribué dans ladite cuve, ledit cycle de lavage et ledit cycle d'hygiénisation étant distincts l'un de l'autre.
EP11804790.1A 2010-10-07 2011-10-07 Machine lave-vaisselle à cycles de lavage et procédé pour sa désinfection Active EP2624739B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15192928.8A EP3000376B1 (fr) 2010-10-07 2011-10-07 Machine à laver la vaisselle et son procédé d'hygiénisation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000825A ITTO20100825A1 (it) 2010-10-07 2010-10-07 Macchina lavastoviglie con cicli di pulizia e metodo di igienizzazione di tale macchina.
PCT/IB2011/054418 WO2012046208A2 (fr) 2010-10-07 2011-10-07 Machine lave-vaisselle à cycles de lavage et procédé d'hygiénisation de celle-ci

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP15192928.8A Division EP3000376B1 (fr) 2010-10-07 2011-10-07 Machine à laver la vaisselle et son procédé d'hygiénisation
EP15192928.8A Division-Into EP3000376B1 (fr) 2010-10-07 2011-10-07 Machine à laver la vaisselle et son procédé d'hygiénisation

Publications (2)

Publication Number Publication Date
EP2624739A2 true EP2624739A2 (fr) 2013-08-14
EP2624739B1 EP2624739B1 (fr) 2015-12-09

Family

ID=43738369

Family Applications (2)

Application Number Title Priority Date Filing Date
EP15192928.8A Active EP3000376B1 (fr) 2010-10-07 2011-10-07 Machine à laver la vaisselle et son procédé d'hygiénisation
EP11804790.1A Active EP2624739B1 (fr) 2010-10-07 2011-10-07 Machine lave-vaisselle à cycles de lavage et procédé pour sa désinfection

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP15192928.8A Active EP3000376B1 (fr) 2010-10-07 2011-10-07 Machine à laver la vaisselle et son procédé d'hygiénisation

Country Status (3)

Country Link
EP (2) EP3000376B1 (fr)
IT (1) ITTO20100825A1 (fr)
WO (1) WO2012046208A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3391799A1 (fr) * 2017-04-18 2018-10-24 V-Zug AG Lave-vaisselle

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5524358A (en) * 1995-03-24 1996-06-11 Matz; Warren W. Dishwasher ventilation filtration kit
JPH1014844A (ja) * 1996-07-04 1998-01-20 Sanyo Electric Works Ltd 食器・器具洗浄殺菌装置
JP2003144372A (ja) * 2001-11-14 2003-05-20 Sanyo Electric Co Ltd 食器洗い機
ES2393552T3 (es) * 2003-10-24 2012-12-26 Ozone Wash (Pty) Limited Procedimiento de lavado de artículos de mesa que incluye un biocida
DE102005004091A1 (de) * 2004-12-09 2006-06-22 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit Ozonspeicher
ATE511566T1 (de) * 2006-03-01 2011-06-15 Arcelik As Waschvorrichtung
KR101283870B1 (ko) * 2006-05-15 2013-07-08 엘지전자 주식회사 식기 세척기의 살균 제어 방법
JP2008036232A (ja) * 2006-08-08 2008-02-21 Sharp Corp 食器洗い機
DE102006052890A1 (de) * 2006-11-09 2008-05-15 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zur Desinfektion von Leitungssystemen eines wasser-führenden Haushaltsgeräts sowie derartiges Haushaltsgerät
ITRN20070061A1 (it) * 2007-12-21 2009-06-22 Indesit Co Spa Dispositivo elettrico per il lavaggio e/o l asciugatura di oggetti.
DE102008024322A1 (de) * 2008-05-20 2009-11-26 BSH Bosch und Siemens Hausgeräte GmbH Geschirrspülmaschine mit Ozongenerator und Verfahren zur Verbesserung der Hygiene in einem Geschirrspüler

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012046208A2 *

Also Published As

Publication number Publication date
ITTO20100825A1 (it) 2012-04-08
EP3000376A2 (fr) 2016-03-30
WO2012046208A3 (fr) 2012-07-26
EP3000376A3 (fr) 2016-07-13
WO2012046208A2 (fr) 2012-04-12
EP2624739B1 (fr) 2015-12-09
EP3000376B1 (fr) 2018-11-28

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