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EP0783264A1 - Procede de lavage de vaisselle dans des lave-vaisselle a usage professionnel et lave-vaisselle approprie a la mise en oeuvre dudit procede - Google Patents

Procede de lavage de vaisselle dans des lave-vaisselle a usage professionnel et lave-vaisselle approprie a la mise en oeuvre dudit procede

Info

Publication number
EP0783264A1
EP0783264A1 EP95932771A EP95932771A EP0783264A1 EP 0783264 A1 EP0783264 A1 EP 0783264A1 EP 95932771 A EP95932771 A EP 95932771A EP 95932771 A EP95932771 A EP 95932771A EP 0783264 A1 EP0783264 A1 EP 0783264A1
Authority
EP
European Patent Office
Prior art keywords
dishwasher
powder
cleaning agent
cleaning
detergent
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
EP95932771A
Other languages
German (de)
English (en)
Other versions
EP0783264B1 (fr
Inventor
Friedel Rings
Johann Herbst
Michael Bergmann
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.)
Ecolab GmbH and Co OHG
Original Assignee
Henkel Ecolab GmbH and Co KG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6529313&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0783264(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Henkel Ecolab GmbH and Co KG filed Critical Henkel Ecolab GmbH and Co KG
Publication of EP0783264A1 publication Critical patent/EP0783264A1/fr
Application granted granted Critical
Publication of EP0783264B1 publication Critical patent/EP0783264B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • A47L15/24—Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors
    • A47L15/241—Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors the dishes moving in a horizontal plane
    • 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
    • A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/14—Hard surfaces
    • C11D2111/20—Industrial or commercial equipment, e.g. reactors, tubes or engines

Definitions

  • a metering device for powdered detergent which first conveys the powder from one or more storage containers by means of discharge screws into a metering container and then pneumatically into the washing machine from there (DE 39 07 361 AI). Direct dosing from the sales container into the machine is not carried out here either.
  • a desired concentration of cleaning-active substance is set in the washing liquor circulated in the spray arms of a commercial dishwasher for the cleaning of the tableware.
  • not all soiling can be completely removed with the usual concentration ranges, so that a so-called basic cleaning with an increased concentration of cleaning-active substance is usually carried out in a cycle of about 4 weeks.
  • a highly concentrated cleaning solution has more than 0.5% by weight of cleaning-active substance.
  • liquid cleaning agents can already be provided by the manufacturer in such a highly concentrated form
  • powdery cleaning agents first have to be prepared in a stock solution container for such a highly concentrated solution and kept ready for the rinsing process. This additional work step when using particle-shaped cleaning agents entails an undesirable outlay.
  • the invention is therefore based on the object of making it possible, with the method of the type mentioned at the outset, easily and economically to precisely meter detergent directly from the sales container into the dishwasher without major changes to the overall method. Retrofitting existing dishwashers should also be possible in a simple and inexpensive way.
  • This object is achieved in that the particulate cleaning agent is sucked in from a cleaning agent container arranged outside the dishwasher and pneumatically into a washing machine.
  • ka mer in multi-tank machines preferably in the second or subsequent rinsing chamber lying in the transport direction of the wash items.
  • the cleaning agent is blown directly at the items to be washed.
  • the cleaning agent can thus develop its undiminished cleaning power at the desired location immediately after entering the dishwasher.
  • the invention is particularly advantageous for use in a method for machine cleaning of tableware in a commercial dishwasher with one or more washing zones or cycles, in which the tableware is first subjected to a rough cleaning by spraying with water.
  • the use of the method according to the invention makes it possible, when using particulate detergent, to produce a highly concentrated detergent solution on the tableware without the need to prepare a base liquor beforehand.
  • Pneumatically conveyed, particle-shaped cleaning agent is added to the utensils that are still wet from the previous rough clearing with water before entering a further washing zone or before the start of a further washing cycle, e.g. B. sprayed in the intermediate zone between two wash tanks.
  • the sprayed cleaning powder is evenly applied to the Washware spreads and sticks to the wet or damp areas of the tableware.
  • a highly concentrated detergent solution with a very good swelling and dissolving action on so-called accumulated starch deposits is instantly formed on the moist surface of the wash ware. Even with a discontinuous injection, the wash ware is thoroughly cleaned over a longer period of time.
  • the highly concentrated cleaning solution is created particularly quickly when the particulate cleaning agent is blown in in the form of a powder mist.
  • the cleaning powder is preferably sprayed on in such an amount and in such a way that the wash ware is almost completely powder-covered, as provided by the invention in an embodiment.
  • the cleaning agent is preferably blown onto the washware with a fan-shaped jet characteristic. This gives a very uniform distribution of the cleaning agent on the surfaces to be cleaned.
  • the cleaning agent can be inflated onto the wash ware in different ways.
  • the particulate cleaning agent is allowed to emerge into the respective rinsing chamber at only one opening of a delivery line and, at the same time, this opening is pivoted back and forth in a substantially horizontal plane, in particular periodically, so that the blown-in product is uniform the dishes.
  • the end of the delivery line can be designed, for example, as a pivotable hose, as is described in more detail below in an exemplary embodiment.
  • the powder can also be inflated onto the items to be washed via several nozzles and in this way the cleaning agent can be distributed as uniformly as possible.
  • a fine water mist be sprayed in addition to blowing in the cleaning agent.
  • the water mist knocks down the powder and spreads it evenly on the surface of the wash ware.
  • the devices necessary for the circulation of the recycled cleaning powder can at the same time also be used for conveying fresh cleaning powder.
  • the dissolution rate and the cleaning behavior as well as the composition of conventional dishwashing detergent powders are sufficient for carrying out the process according to the invention are, so that the invention is further characterized in that the cleaning powder is a conventional dishwasher cleaner.
  • the powder can be sucked in with a blower, passed through it and finally blown into the machine.
  • a so-called injector can advantageously be used, which is connected via a suction line to a suction lance arranged in the powder container.
  • compressed air is supplied via an annular gap within the Venturi housing.
  • injectors which also include injectors that are to be introduced directly into the powder structure and that serve as the mouthpiece of a suction lance, are possible. It is therefore proposed that the powder be sucked in with an injector operated with compressed air, passed through the injector and conducted into the machine from the pressure side of the injector. Good extraction of the air from the machine is important here, since the amount of air introduced with the powder is relatively high.
  • external air is fed into the conveying line to end the powder conveyance.
  • portions can be created with this.
  • the delivery line is blown free and product accumulations in the line can be prevented. If a blower is used, the suction line can be ventilated directly behind or inside the suction lance via a solenoid valve.
  • the injector is operated intermittently, in particular periodically, with working fluid under pressure.
  • the compressed air is e.g. B. generated by a small compressor with a connected pressure vessel.
  • a connecting line from a pressure source to the injector can be provided, which has a solenoid valve with a relatively large cross section.
  • the solenoid valve When the solenoid valve is briefly opened, a short, powerful suction cycle is generated. With this method of shock relief, portioning of the sucked powder can be achieved in a simple manner.
  • the compressed air pulse is clocked in resonance with the swivel frequency of the injection opening.
  • the invention relates not only to a method for cleaning dishes, but also to a commercial dishwasher with a clearing zone or cycle and one or more washing zones or cycles.
  • a pneumatic conveying line for the detergent opening into the free space of a chamber in the dishwasher is achieved by a pneumatic conveying line for the detergent opening into the free space of a chamber in the dishwasher.
  • the delivery line opens into the second or subsequent washing chamber lying in the transport direction of the items to be washed.
  • the blown-in cleaning agent hits the already damp surface of the wash ware and forms a highly concentrated solution with the advantageous effects described above.
  • the opening of the delivery line is preferably designed as a nozzle suitable for spraying a powder, in particular with a fan-shaped spray characteristic.
  • the invention provides in a further embodiment that the conveyor line has outlet openings above and below the tableware moving on a tableware transport device.
  • a preferably funnel-like collecting pan with a discharge opening is arranged below the tableware moving on the tableware transport device.
  • the delivery line has an injector that can be operated with compressed air.
  • a driving nozzle is arranged in front of the inlet of the delivery line.
  • the outlet of the delivery line is preferably designed as a tubular elbow, as has already been explained in connection with the method according to the invention.
  • FIG. 1 shows a schematic illustration of a customary commercial dishwasher
  • FIG. 2 shows a chamber of the dishwasher according to FIG. 1 with a blowing device for particulate cleaning agent according to the invention
  • FIG. 3 shows a representation of an exemplary embodiment according to the invention for powder storage and circulation or metering of the powder for the dishwasher according to FIG. 1,
  • FIG. 4 shows a schematic illustration of a commercial dishwasher with a device for blowing in particulate cleaning agents according to a second exemplary embodiment according to the invention
  • FIGS. 4 and 5 shows the area of the dispensing of the cleaning agent into the dishwasher in the exemplary embodiment according to FIGS. 4 and 5.
  • the dishwasher has washing zones 4, 5 and 6, of which washing zone 4 is also referred to as a pump clearing zone.
  • the rinsing or rinsing zone 7 adjoins the washing zone 6.
  • Each of the washing zones 4, 5 and 6 includes a tank 8, 9 or 10, from which the washing liquor located in the respective tank is supplied to the associated spray devices 14, 15 and 16 by means of circulation pumps 11, 12, 13. Since the dishes pass through the dishwasher 1 in the direction of the arrow, in the following the tank 8 is also the first or third last tank, the tank 9 referred to as the middle or penultimate tank and the tank 10 as the last tank.
  • a funnel-like trough 37 for collecting excess powder product is arranged underneath the tableware and between the belt sections of the transport device 32 running back and forth is in the chamber 31 below the spray nozzles 34 and 35.
  • a suction opening 38 is provided in the bottom of the collecting trough 37, through which the excess powder is sucked off via a pipeline and, if necessary after drying, is fed back to the detergent container.
  • FIG. 3 shows an exemplary embodiment for powder storage and circulation or dosing of the powder according to the invention.
  • the particulate cleaning agent is discharged from a cleaning agent container 39 via a pneumatic powder extraction 40 and supplied to the commercial dishwashers via the conveying line 43.
  • Pneumatic powder extraction can be carried out in accordance with European patent application 0297443, to which reference is expressly made to supplement the disclosure.
  • the detergent container 39 can be pressurized and is sealed accordingly.
  • a line for the carrier gas leads through the lower part of the detergent container 39.
  • An inert gas such as argon or nitrogen, but preferably compressed air, is used as the carrier gas.
  • the line arranged in the lower part of the cleaning agent container 39 has one or more powder inlet openings.
  • the inlet openings are arranged in such a way that there is no gravity feed of the particulate cleaning agent in the absence of a gas flow through the openings.
  • the openings can be arranged laterally, for example.
  • the cleaning agent is fluidized on the one hand and dried on the other hand via line 46, which leads from the upper region of the cleaning agent container 39 via a drying device 47 into the lower region of the cleaning agent container.
  • the fluidizing gas is of the same type as the gas for conveying the cleaning agent and in particular consists of air.
  • the line 33 has a cross section narrowed in the manner of a Venturi nozzle in order to improve the suction effect.
  • the product is here in one place, namely blown in via a 15 to 25 cm long, freely movable, flexible hose.
  • the hose is stimulated to perform a horizontal pivoting movement, as a result of which the blown-in product is distributed in a fan shape on the items to be washed.
  • the distribution and dissolution of the product is supported by a fine water mist.
  • the distance between the spray registers 67 and the subsequent spray register 71 of the commercial dishwasher should be dimensioned in coordination with the average belt speed so that the exposure time of the wetted powder film to the washware surface is at least 5 s and preferably 10 to 15 s.
  • FIG. 5 shows the product conveyor unit 61 of this embodiment.
  • Compressed air from the source 51 passes through a throttle valve 52 and a solenoid valve 53 to the drive nozzle 54.
  • the fluidized product in the supply container 39 is accelerated in the catch nozzle 55 and reaches the commercial dishwasher via the feed line 33, as indicated by the arrows 60 becomes.
  • Compressed air flows via a branch in the compressed air line via a further solenoid valve 57, which is controlled by a clock control 58, and also via a line 59 to the dishwasher.
  • This device is used to generate short bursts of compressed air, the meaning of which is briefly explained below.
  • FIG. 6 shows a top view of the blowing device inside the commercial dishwasher.
  • the product delivery line 43 and the feed line 59 for the clocked compressed air blasts lead to a holder 64.
  • the product feed line 6 continues in the movable injection hose 65.
  • the feed line 59 is guided in such a way that it guides the compressed air blasts laterally onto the injection hose 65. This results in the swivel range 66 of the injection hose, which extends over the entire width 67 of the chamber.
  • the timing of the compressed air pulse via the solenoid valve 57 is advantageously chosen so that it is in resonance with the pivoting frequency of the injection hose.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Abstract

Un détergent particulaire est aspiré à partir d'un récipient à détergent (39), situé à l'extérieur d'un lave-vaisselle (1), et acheminé par voie pneumatique dans un compartiment de lavage (4-6). Dans le cas de machines à plusieurs cuves, le détergent est de préférence acheminé dans le second compartiment de lavage (4-6), ou le compartiment suivant, situé dans le sens d'acheminement de la vaisselle à laver. Ceci permet de doser le détergent de façon précise, facile et économique, directement de l'emballage de vente dans le lave-vaisselle (1), sans modification importante de l'ensemble du procédé et sans perturber le procédé de lavage prédéterminé.
EP95932771A 1994-09-27 1995-09-18 Procede de lavage de vaisselle dans des lave-vaisselle a usage professionnel et lave-vaisselle approprie a la mise en oeuvre dudit procede Expired - Lifetime EP0783264B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4434498 1994-09-27
DE4434498A DE4434498C2 (de) 1994-09-27 1994-09-27 Verfahren zum Reinigen von Geschirr in gewerblichen Geschirrspülmaschinen und zur Durchführung des Verfahrens geeignete Geschirrspülmaschine
PCT/EP1995/003665 WO1996009790A1 (fr) 1994-09-27 1995-09-18 Procede de lavage de vaisselle dans des lave-vaisselle a usage professionnel et lave-vaisselle approprie a la mise en oeuvre dudit procede

Publications (2)

Publication Number Publication Date
EP0783264A1 true EP0783264A1 (fr) 1997-07-16
EP0783264B1 EP0783264B1 (fr) 1999-02-10

Family

ID=6529313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95932771A Expired - Lifetime EP0783264B1 (fr) 1994-09-27 1995-09-18 Procede de lavage de vaisselle dans des lave-vaisselle a usage professionnel et lave-vaisselle approprie a la mise en oeuvre dudit procede

Country Status (4)

Country Link
EP (1) EP0783264B1 (fr)
AT (1) ATE176585T1 (fr)
DE (2) DE4434498C2 (fr)
WO (1) WO1996009790A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10017241A1 (de) * 2000-04-06 2001-10-11 Bsh Bosch Siemens Hausgeraete Verfahren zur Förderung von fließfähigen Stoffen
US7754025B1 (en) 2000-06-08 2010-07-13 Beverage Works, Inc. Dishwasher having a door supply housing which holds dish washing supply for multiple wash cycles
US6799085B1 (en) 2000-06-08 2004-09-28 Beverage Works, Inc. Appliance supply distribution, dispensing and use system method
US7083071B1 (en) 2000-06-08 2006-08-01 Beverage Works, Inc. Drink supply canister for beverage dispensing apparatus
DE20017158U1 (de) 2000-10-06 2000-12-21 Jesinghaus & Co. Maschinenbau GmbH, 74821 Mosbach Vorrichtung zum Spülen von Mehrwegtrinkgefäßen
CN109758080A (zh) * 2019-03-27 2019-05-17 中万恩科技有限公司 一种带有分配器的掀门式洗碗机

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US3340888A (en) * 1962-08-01 1967-09-12 Grace W R & Co Chemical feeder
FR1408149A (fr) * 1963-09-20 1965-08-06 Appareil de nettoyage automatique pour laver et rincer de la vaisselle, des pots, des verres ou des objets analogues
DE1585746A1 (de) * 1965-12-22 1970-11-12 Zanussi A Spa Industrie Verteiler fuer koernige bzw. pulverfoermige Stoffe,insbesondere fuer Waschmaschinen u.dgl.
DE1920575B2 (de) * 1969-04-23 1971-08-19 Stierten-Werke AG, 7550 Rastatt Spritzeinrichtung fuer geschirrspuelmaschinen
DE3131471A1 (de) * 1981-03-20 1982-09-30 Roderich Wilhelm Dr.-Ing. 6100 Darmstadt Gräff Vorrichtung zum trocknen feuchter abluft aus einem oder mehreren schuettgut-trocknungsbehaeltern
DE3606053C1 (en) * 1986-02-25 1987-08-06 Bosch Siemens Hausgeraete Device for the metered addition of powdery additives to the washing container of a domestic dishwasher
DE3707366A1 (de) * 1987-03-07 1988-09-15 Diversey Gmbh Verfahren zur kontinuierlichen oder diskontinuierlichen maschinellen reinigung von gebrauchsgeschirr
DE3721381A1 (de) * 1987-06-29 1989-01-19 Henkel Kgaa Pulverdosiervorrichtung
DE3721741A1 (de) * 1987-07-01 1989-01-12 Basf Ag Strahlungsempfindliches gemisch fuer lichtempfindliche beschichtungsmaterialien
DE3907361A1 (de) * 1989-03-08 1990-09-20 Henkel Kgaa Pulverdosiergeraet
NL9001543A (nl) * 1990-07-05 1992-02-03 Epenhuysen Chem Fab Werkwijze en sproeikop voor het vernevelen van een geconcentreerd vloeibaar produkt.
SE9003730D0 (sv) * 1990-11-23 1990-11-23 Electrolux Ab Saett att transportera vaetska fraan en vaetskesamling till en yta paa ett foeremaal
DE4037443A1 (de) * 1990-11-24 1992-05-27 Mann & Hummel Filter Vorrichtung zum trocknen von schuettgut
DE4040227C2 (de) * 1990-12-15 2003-11-20 Hans Georg Platsch Pudernebelgenerator
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DE4124881C2 (de) * 1991-07-26 1994-05-26 Henkel Kgaa Vorrichtung zum Ansetzen einer Stammlauge
EP0611843B1 (fr) * 1993-02-15 1998-05-20 R.& D.S. S.r.l. Dispositif automatique de distribution et de dosage de lessive en poudre dans les machines à laver
DE4309378C1 (de) * 1993-03-23 1994-03-03 Henkel Ecolab Gmbh & Co Ohg Pulversauglanze
DE4407684C1 (de) * 1994-03-08 1995-06-29 Henkel Ecolab Gmbh & Co Ohg Vorrichtung zum Öffnen und dosierten Entleeren von Säcken

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Title
See references of WO9609790A1 *

Also Published As

Publication number Publication date
DE59505099D1 (de) 1999-03-25
ATE176585T1 (de) 1999-02-15
EP0783264B1 (fr) 1999-02-10
DE4434498A1 (de) 1996-03-28
DE4434498C2 (de) 1996-12-12
WO1996009790A1 (fr) 1996-04-04

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