EP2217124A1 - Lave-vaisselle et procédé permettant de le faire fonctionner - Google Patents

Lave-vaisselle et procédé permettant de le faire fonctionner

Info

Publication number
EP2217124A1
EP2217124A1 EP08856296A EP08856296A EP2217124A1 EP 2217124 A1 EP2217124 A1 EP 2217124A1 EP 08856296 A EP08856296 A EP 08856296A EP 08856296 A EP08856296 A EP 08856296A EP 2217124 A1 EP2217124 A1 EP 2217124A1
Authority
EP
European Patent Office
Prior art keywords
during
washing
dishes
rinse
cleaning
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
EP08856296A
Other languages
German (de)
English (en)
Other versions
EP2217124B1 (fr
Inventor
Harald Disch
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.)
Premark FEG LLC
Original Assignee
Premark FEG LLC
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 Premark FEG LLC filed Critical Premark FEG LLC
Publication of EP2217124A1 publication Critical patent/EP2217124A1/fr
Application granted granted Critical
Publication of EP2217124B1 publication Critical patent/EP2217124B1/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
    • A47L15/42—Details
    • A47L15/4234—Steam generating arrangements
    • 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
    • A47L15/0007—Washing phases
    • 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
    • A47L15/0076—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals
    • A47L15/0078—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 a plurality of fluid recirculation arrangements, e.g. with separated washing liquid and rinsing liquid recirculation circuits
    • 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
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
    • 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
    • A47L2601/04—Steam

Definitions

  • the invention relates to a dishwasher, in particular a commercial dishwasher, and a method for its operation.
  • Dishwashing machines especially commercial dishwashing machines, in the form of box-type warewashers may be hood-type warewashers or frontloader warewashers.
  • a dishwashing machine (box-type warewasher) and several methods for its operation are known, for example, from WO 2006/129963 A2. It is provided with a steam generator for the treatment of the dishes with steam during different process cycles. The use of steam is provided before a wash cycle or after a wash cycle.
  • the treatment of items to be washed by means of steam between a pre-cleaning cycle and a Hauptreimgungszyklus is also known from DE 29 00 954 Al.
  • EP 0 808 894 B1 a method is known, according to which the items to be washed are sprayed with detergent solution (detergent) during a pre-cleaning cycle, before a main cleaning cycle and then a final rinse cycle take place.
  • the spraying of items to be washed with a highly concentrated alkaline detergent solution is also known from EP 1 347 039 B1.
  • washware is usually not only from dishes such as tefler and cups, but also from cutlery such as spoons, forks and knives, and also from other utensils such as trays, pots and pans, dishwashers, especially commercial dishwashers, also as utensil dishwashing machines (warewashers).
  • a first step which involves washing with a washing liquid
  • a second step which includes rinsing with heated fresh water and metered clear rinse.
  • a commercial dishwasher is usually equipped with two independent liquid-ket systems, which are completely separate from each other.
  • the one fluid system is a wash water circuit, which is responsible for the washing of the items to be washed, wherein the washing is carried out with recirculated water from a wash tank.
  • the other fluid system is a fresh water system, which is responsible for the rinse.
  • the rinse is done with fresh water, preferably with fresh water from a water heater (boiler).
  • the fresh water is also absorbed by the wash tank after spraying.
  • the main task of rinsing is to remove lye on the dishes.
  • the kitchen rinse water flowing into the wash tank during the rinse step serves to regenerate the wash water present in the wash tank.
  • Today's dishwashers are equipped with several programs. These programs differ mainly by different long program durations of the washing process step. The customer has the option of selecting a short washing program for slightly soiled dishes or choosing a correspondingly longer washing program for heavily soiled dishes.
  • the aim of the invention is to provide a way by which the cleaning process can be reduced in an ergonomic and environmentally friendly manner.
  • the invention relates to a dishwasher or utensil dishwasher, which is designed as a programmer and for carrying out the following method steps:
  • Step 1 Performing a pretreatment cycle consisting of spraying the wash ware with an alkaline, highly concentrated detergent solution whose pH is at least 1 above the pH of the wash liquor of a main wash cycle;
  • the invention precedes the washing cycle by two process steps, in which steam is used in combination with a highly concentrated alkaline detergent solution for soaking contaminants on the items to be washed, in particular contaminants in the form of food residues or other food residues.
  • the highly concentrated alkaline cleaning solution is sprayed onto the items in the treatment chamber of the dishwasher or the utensil dishwasher.
  • an exposure time is integrated into the program sequence during which the highly concentrated alkaline detergent solution can act on the dishes and during which additional steam is introduced into the treatment chamber, e.g. B. in the Spülgut Scheme and there is sprayed on the dishes.
  • the main cleaning step takes place, which can take place in a conventional manner.
  • the main cleaning step may be assisted to assist the washing power by hot water vapor during which the main cleaning step is introduced into the treatment chamber.
  • steam Due to the even distribution of steam, steam has an advantage over a conventional washing cycle, especially in shadow zones of the dishes. Steam reaches each item of washware within the processing chamber in equal parts, regardless of the position and orientation of the items to be washed, such as the plates, cups, trays, pans and pots.
  • FIG. 1 shows schematically a dishwasher according to the invention
  • Fig. 2 shows schematically another embodiment of a dishwasher according to the invention
  • Fig. 3 shows schematically another embodiment of a dishwasher according to the invention
  • Fig. 4 shows schematically another embodiment of a dishwasher according to the invention
  • Fig. 5 shows schematically another embodiment of a dishwasher according to the Invention
  • Fig. 6 shows schematically another embodiment of a dishwasher according to the invention.
  • FIGS 1 to 6 show six different embodiments of dishwashers 100, 200, 300, 400, 500, and 600 according to the invention.
  • the invention relates to dishwashers, in particular commercial dishwashers, which can also be labeled as utensil dishwashers (warewashers), in the form of a program automaton. They contain a program control device 2 for controlling at least one cleaning program and a treatment chamber 4 closable by a door (not shown) or a hood (not shown) in a machine housing 6 for receiving items to be cleaned (not shown) such as crockery, cutlery, Pots, pans and trays.
  • a program control device 2 for controlling at least one cleaning program and a treatment chamber 4 closable by a door (not shown) or a hood (not shown) in a machine housing 6 for receiving items to be cleaned (not shown) such as crockery, cutlery, Pots, pans and trays.
  • a wash tank 8 Under the treatment chamber 4 is a wash tank 8 for receiving sprayed liquid from the treatment chamber 4.
  • a washing pump 10 is provided for conveying washing liquid from the wash tank 8 through a washing liquid line system 12 to washing nozzles 14 and 16, which in the treatment chamber 4 on the area of the items to be cleaned are directed and spray the washing liquid on the items to be cleaned.
  • the sprayed washing liquid falls by gravity back into the wash tank 8.
  • the wash tank 8, the washing pump 10, the washing liquid conduit system 12, the washing nozzles 14 and 16 together with the cleaning chamber 4 form a washing liquid circuit.
  • the washing liquid piping 12 connects the pressure side of the washing pump 10 with the washing nozzles 14 and 16.
  • a rinse aid 18 is provided for conveying rinse liquid by means of a rinse pump 20 through a rinsing liquid line system 22 to rinse nozzles 24 and 26, which are directed in the treatment chamber 4 to the area of the ware to be cleaned.
  • the sprayed rinse liquid falls by gravity from the treatment chamber 4 in the wash tank 8.
  • Das Rinsing liquid line gamma 22 connects the pressure side of the rinse pump 20 to the rinse nozzles 24 and 26.
  • the washing nozzles 14 and 16 and the rinse nozzles 24 and 26 can be arranged in the regions above and / or below and, if desired, also laterally of the washware region and in each case directed against the region in which the washware is positioned.
  • a plurality of wash nozzles 14 are provided on at least one upper wash arm 15, a plurality of wash nozzles 16 on at least one lower wash arm 17, a plurality of rinse nozzles 24 on at least one upper rinse arm 25, and a plurality of rinse nozzles 26 on at least one lower rinse arm 27 ,
  • wash tank 8 If the wash tank 8 is empty before a first start of the dishwasher, it must first be filled with fresh water via a fresh water line (not shown) or with the rinse aid 18 and its rinse aid 20 with fresh water or with another final rinse liquid.
  • the final rinse liquid may be fresh water or fresh water mixed with rinse aid.
  • the washing liquid contains a detergent, which is automatically added to the liquid contained in the washing tank 8 by a detergent metering device (not shown).
  • All dishwashers of the invention include a steam device with a steam generator for generating and introducing water vapor into the steam generator Treatment chamber, in order to pressurize the dishes with water vapor.
  • the steam device can be realized in various embodiments. Examples are shown in FIGS. 1 to 6.
  • the suction side of the rinse aid 20 can be connected to a fresh water connection 36 via a non-return valve 34.
  • the back suction preventer 34 air gap prevents a sucking back of liquid from the rinse liquid line system 22 via the Frischwasseranschfuss 36 in the public water supply network.
  • a water heater 35 may be located between the rinsegverh ⁇ nderer 34 and the suction side of the rinse pump 20, a water heater 35 may be located.
  • the dishwashers 100, 200 and 300 of FIGS. 1, 2 and 3 are provided with a steam device 38, which contains a steam generator 40 whose steam side 41 is connected to the treatment chamber 4 via a steam line 42 and whose water side can be connected to a fresh water connection 36, For example, via a check valve 37.
  • the downstream end 44 of the steam line 42 ends, for example, in a side wall of the treatment chamber. 4
  • the steam generator 40 may also be integrated into the dishwasher in such a way that its steam outlet 41 opens directly into the treatment chamber 4 without the steam line 42.
  • the steam generator 40 can be arranged under the treatment chamber 4.
  • a combined water heater and steam device 48 is provided instead of the steam device 38.
  • the water heater and steam device 48 includes a steam generator 50.
  • the steam generator 50 is connectable to a fresh water connection 36 and has a steam outlet 51 which, Further, the steam generator 50 has a rinse liquid outlet 55, which is connected to the suction side of the rinse pump 20 for conveying rinse liquid through the Rinse liquid line system 22 to the rinse nozzles 24 and 26th
  • the steam generator 50 includes a heater 56. Steam or heated final rinse liquid can be generated through it.
  • the program control device 2 of the dishwashers 100, 200, 300, 400, 500 and 600 of FIGS. 1 to 6 contains at least one cleaning program, which is designed to carry out the following program steps: Step 1: Carry out a pretreatment cycle consisting of spraying the wash ware with an alkaline highly concentrated detergent solution whose pH is at least 1 above the pH of the main wash cycle wash;
  • Spraying the rinse with the alkaline, highly concentrated detergent solution whose pH is at least 1 above the pH of the main wash cycle wash can be accomplished in a number of ways.
  • a supply and spray system is provided, by means of which the alkaline, highly concentrated detergent solution whose pH is at least 1 above the pH of the washing liquid of a main washing cycle, conveyed out of a detergent solution container and in the Treatment chamber 4 can be sprayed on the dishes.
  • an alkaline, high concentration detergent solution supply and spray system 110 which consists of a supply device 112 and a spray device 114.
  • the feeder 112 includes a cleaner solution pump 60 having a suction side 61 and a pressure side 62. Connected to the suction side 61 is a suction line 64 for conveying alkaline concentrated cleaner solution 66 from a cleaner solution tank 68.
  • the spray device 114 consists of a connected to the pressure side 62 of the cleaner solution pump 60 cleanser solution line system 70 and attached cleaning solution nozzles, z. B. Cleaner solution nozzles 74, which are formed in a preferably above the Spülgut ceremoniess the cleaning chamber 4 arranged Ropteratessarm 75, and / or cleaning solution nozzles 76 which are formed in a preferably below the Spülgut ceremoniess the cleaning chamber 4 arranged Rown insectssarm 77.
  • the washing machines 200 and 400 of FIGS. 2 and 4 again have the alkaline, highly concentrated detergent solution supply device 112, but here no separate spraying device 114 is provided, but the pressure side 62 of the detergent solution pump 60 is connected to the final rinse liquid line system 22 via a connecting line 78 connected.
  • rinse aid liquid or the alkaline, highly concentrated cleaner solution 66 can be sprayed onto the washware via the rinse aid nozzles 24, 26 as an alternative.
  • the high-concentration cleaner supply and spray system 120 of these dishwashing machines 200 and 400 thus consists of the feed device 112 and the final-rinse liquid line system 22 as well as the rinse-aid nozzles 24 and 26.
  • a supply and spray system 130 is provided for the alkaline, high-concentration detergent solution which in turn contains the feeder 112, but not the spray system 114.
  • the scrubbing liquid spray system is used by connecting the pressure side 62 of the scrubber solution pump 60 to the scrubbing liquid line system 12 via a connection line 78.
  • highly concentrated cleaning solution 66 can be sprayed.
  • the program control device 2 controls the washing pump 10, the rinse pump 20, the drainage pump 30 and the detergent solution pump 60 as a function of the respective cleaning program selected by the operator on the program control device 2. At least one cleaning program is provided, preferably a plurality of optionally selectable cleaning programs are provided.
  • the at least one cleaning program can be designed in such a way that the introduction of steam into the treatment chamber for the thermal pretreatment of the ware according to step 2 is started already after the start but before the end of step 1, preferably during the last one Quarter of the time from step 1.
  • the at least one cleaning program can be designed such that the spraying of the items to be washed with an alkaline, highly concentrated detergent solution according to step 1 is carried out for a period in the range between 5 seconds and 30 seconds, preferably between 10 seconds and 20 seconds.
  • the cleaner program can be designed such that the thermal effect of steam on the items to be washed during said step 2 during a period in the range between 0.5 minutes to 7 minutes, preferably in a range between 1 minute to 4 minutes.
  • the pH of the alkaline, highly concentrated cleaning solution for spraying the dishes according to step 1 is at least 11.
  • the at least one cleaning program for cleaning items which is heavily soiled and / or contains stubborn dirt can include that before spraying the dishes with an alkaline, highly concentrated cleaning solution according to step 1, a pre-cleaning step is carried out, during which the Washware with liquid, preferably detergent containing washing liquid is sprayed.

Landscapes

  • Washing And Drying Of Tableware (AREA)
  • Detergent Compositions (AREA)

Abstract

Lave-vaisselle, en particulier lave-vaisselle de type industriel, et procédé permettant de le faire fonctionner. Le lave-vaisselle est conçu pour la mise ne oeuvre des étapes suivantes du procédé. Étape 1 : exécution d'un cycle de prétraitement, comprenant l'arrosage de la matière à laver par une solution de nettoyage alcaline, hautement concentrée, dont le pH est supérieur d'au moins une valeur 1, au pH du liquide de lavage d'un cycle de lavage principal; étape 2, suivant l'étape 1 : exécution d'un cycle de mise en action pendant une durée d'action au cours de laquelle la solution de nettoyage agit sur la matière à laver, et la matière à laver est prétraitée en outre thermiquement par la vapeur d'eau, le prétraitement thermique de ladite matière s'effectuant pendant au moins une partie de la durée d'action, de préférence, pendant toute la durée d'action; étape 3, suivant l'étape 2 : exécution d'un cycle de lavage principal, comprenant l'arrosage de la matière à laver par un liquide de lavage contenant de l'eau et un détergent; étape 4 suivant l'étape 3 : exécution d'un cycle de rinçage au cours duquel la matière à laver est arrosée par un liquide de rinçage.
EP08856296.2A 2007-12-06 2008-11-25 Lave-vaisselle et procédé permettant de le faire fonctionner Active EP2217124B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007059030A DE102007059030A1 (de) 2007-12-06 2007-12-06 Geschirrspülmaschine und Verfahren zu ihrem Betrieb
PCT/EP2008/066141 WO2009071466A1 (fr) 2007-12-06 2008-11-25 Lave-vaisselle et procédé permettant de le faire fonctionner

Publications (2)

Publication Number Publication Date
EP2217124A1 true EP2217124A1 (fr) 2010-08-18
EP2217124B1 EP2217124B1 (fr) 2014-05-07

Family

ID=40329429

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08856296.2A Active EP2217124B1 (fr) 2007-12-06 2008-11-25 Lave-vaisselle et procédé permettant de le faire fonctionner

Country Status (4)

Country Link
US (1) US9351627B2 (fr)
EP (1) EP2217124B1 (fr)
DE (1) DE102007059030A1 (fr)
WO (1) WO2009071466A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110000510A1 (en) * 2009-07-01 2011-01-06 General Electric Company Dishwasher steam algorithm
ES2579330T3 (es) * 2011-09-01 2016-08-10 Lg Electronics Inc. Lavavajillas
US9661980B2 (en) * 2015-10-09 2017-05-30 Bsh Home Appliances Corporation Pre-soak option for dishwashers
US10975190B2 (en) * 2016-07-21 2021-04-13 Bionanofoam Llc Bio-based and hydrophilic polyurethane prepolymer and foam made therefrom
US10506908B2 (en) 2016-07-22 2019-12-17 Illinois Tool Works Inc. Batch-type warewasher with energy retaining curtain
DE102018214071B4 (de) 2018-08-21 2020-07-09 Meiko Maschinenbau Gmbh & Co. Kg Reinigungsvorrichtung und ein Verfahren zur Reinigung von Reinigungsgut
US20210267432A1 (en) * 2020-02-27 2021-09-02 Ravinder Fotedar Steam Cleaning Apparatus

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JPS607641Y2 (ja) 1978-01-11 1985-03-14 シャープ株式会社 食器洗浄機
DE4233936C2 (de) 1992-10-08 1996-02-01 Bosch Siemens Hausgeraete Verfahren zum Spülen von Spülgut
DE19621053A1 (de) 1996-05-24 1997-11-27 Weigert Chem Fab Verfahren zum Reinigen von Geschirr
ES2290211T3 (es) * 2002-03-18 2008-02-16 CHEMISCHE FABRIK DR. WEIGERT GMBH & CO. KG. Procedimiento para la limpieza de la vajilla.
JP4075842B2 (ja) * 2004-04-12 2008-04-16 松下電器産業株式会社 食器洗い機
DE602005014418D1 (de) * 2004-06-04 2009-06-25 Panasonic Corp Vernebler und mit einem solchen Vernebler ausgerüstete Geschirrspülmaschine oder Waschmaschine
DE102004048091A1 (de) 2004-09-30 2006-04-06 Meiko Maschinenbau Gmbh & Co. Kg Geschirrspülmaschine mit thermischer Nachbehandlung
DE502004009794D1 (de) 2004-11-15 2009-09-03 Weigert Chem Fab Verfahren zum Reinigen von Geschirr
EP1885230A4 (fr) 2005-05-31 2012-08-22 Lg Electronics Inc Lave-vaisselle et procede de commande associe

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Also Published As

Publication number Publication date
WO2009071466A1 (fr) 2009-06-11
DE102007059030A1 (de) 2009-06-10
US9351627B2 (en) 2016-05-31
EP2217124B1 (fr) 2014-05-07
US20100269863A1 (en) 2010-10-28

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