EP0980668A2 - Méthode pour délivrer un liquide, méthode pour générer de la mousse et dispositif mettant en oeuvre une telle méthode - Google Patents

Méthode pour délivrer un liquide, méthode pour générer de la mousse et dispositif mettant en oeuvre une telle méthode Download PDF

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Publication number
EP0980668A2
EP0980668A2 EP99202659A EP99202659A EP0980668A2 EP 0980668 A2 EP0980668 A2 EP 0980668A2 EP 99202659 A EP99202659 A EP 99202659A EP 99202659 A EP99202659 A EP 99202659A EP 0980668 A2 EP0980668 A2 EP 0980668A2
Authority
EP
European Patent Office
Prior art keywords
fluid
foam
dispensing
nozzles
jet
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.)
Withdrawn
Application number
EP99202659A
Other languages
German (de)
English (en)
Other versions
EP0980668A3 (fr
Inventor
Cornelis Schouten
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.)
Epenhuysen Chemie NV
Original Assignee
Epenhuysen Chemie NV
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 Epenhuysen Chemie NV filed Critical Epenhuysen Chemie NV
Publication of EP0980668A2 publication Critical patent/EP0980668A2/fr
Publication of EP0980668A3 publication Critical patent/EP0980668A3/fr
Withdrawn legal-status Critical Current

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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
    • A47L15/24—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
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0055—Metering or indication of used products, e.g. type or quantity of detergent, rinse aid or salt; for measuring or controlling the product concentration
    • 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
    • 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 invention is in the field of dispensing a fluid, such as a gas or liquid, but e.g. also another flowable material, such as granules or powder of a solid matter (patricularly if fluidised), or a gel or paste, etc.
  • a fluid such as a gas or liquid
  • another flowable material such as granules or powder of a solid matter (patricularly if fluidised), or a gel or paste, etc.
  • the invention is in the field of dispensing a foaming liquid, more particularly dispensing a foaming detergent in e.g. a machine dishwasher.
  • EP-A-465454 discloses a method for dispensing a liquid as well as relating equipment. Gas and liquid are seperately guided to a dispensing nozzle and brought together therewith to generate a mist of fine liquid droplets, wherein said mist is directly dosed into the for dispensing developed room, such as the with soiled crockery filled room within a dishwashing machine.
  • an object of the invention is simplifying the equipment. In one aspect an object of the invention is simplifying maintenance. In one aspect an object of the invention is preventing failure. In one aspect an object of the invention to spread as homogeneous as possible a fluid, such as a highly concentrated detergent or another preferably highly concentrated fluid with preferably one or more preferably chemically active substances. In one aspect an object of the invention is efficient generating foam from an e.g. highly concentrated fluid with preferably one or more chemically active substances, such as a detergent. In one aspect an object of the invention is dosing fluid, such as foam, as seperate particles.
  • an object of the invention dosing fluid, such as foam, in such a manner as seperate particles, that when they settle on an object, such as crockery, they generate an at least essentially continuous, the object at least essentially completely covering layer.
  • an object of the invention is dispensing per unit of time an extremely small amount of fluid, particularly with a preferably chemically active substance, such as a liquid detergent.
  • Other fluids with a preferably chemically active substance are e.g. insecticide, paint, coating, adhesive, cleaner, nutrient.
  • the object of the invention is safety.
  • Fig. 1 shows a conveyor type machine dishwasher 1. It comprises a tunnel shaped housing 40, known as such, containing sequentially one or more optional, pre-wash 2, wash 4, rinse 5 and dry sections 6, all known as such.
  • the tunnel shaped housing also contains a dispensing section 3 according to the invention.
  • a conveyor belt not shown, extends through the tunnel shaped housing along the above mentioned sections and projects with front and back end beyond the tunnel shaped housing.
  • the e.g. in baskets 9 (only one shown) positioned crockery 10 is placed on the projecting front end of the conveyor belt at the beginning 7 of the machine 1 and moves in the direction of the arrow A while the machine is active, and is removed from the projecting back end of the conveyor belt at the end 8 of the machine 1. As such the crockery 10 is sequentially precessed by the several sections.
  • the crockery In the pre-wash, wash and rinse section the crockery is poured over with water, with dissolved therein possibly a small amount of detergent, at a rate of approximately 1000 l/hr in a way that is common in the field of machine dish washing, for which a plurality of nozzles 11 above, below and next to the conveyor belt direct relatively powerful water jets from all sides onto the passing crockery, to continuously maintain a relatively powerful water flow over the crockery. Said water is collected in the lower part of the machine in for each section an own reservoir 12 with between adjacent reservoirs an overflow. Water is continuously pumped from the reservoirs and through the nozzles 11 spread over the crockery.
  • tap water is dispensed in the reservoir of the last rinse section and superfluous water is removed from the reservoir of the first pre-wash section.
  • the reservoir below the dispensing section 3 can be part of the cascade-flow. Alternatively, it is seperated therefrom to collect superfluous highly concentrated detergent therein for e.g. reuse.
  • temperatures above room temperature can prevail: 30°C in pre-wash, 50°C in wash and rinse, and 70°C in dry section.
  • the machine 1 comprises an externally located bin 13 for highly concentrated detergent that is conveyed to the machine 1 through tubing 14, preferably by supplying it to the tubing 14 and sucking it therein.
  • This compound can be liquid, but also be of different particle type, such as granules or powder.
  • the machine 1 also comprises a control unit 15 to control the supply of detergent to the machine 1.
  • dispensing nozzle assemblies 16 are arranged above and below the conveyor belt, to direct jets of highly concentrated detergent from below and above onto the wet crockery.
  • seperate fluid particles such as foam particles or foam flakes
  • said jet 19 is the enclosure of the particles that each follow a statistic, own path. While the fluid particles move away from the assembly 16, the mutual distance of the fluid particels generally increases while generally the particles each follow an own ballsitic course.
  • the particles settle on different locations onto the crockery and a plurality of said settled particles evenly makes a continuous layer, e.g. a foam layer.
  • a continuous layer e.g. a foam layer.
  • the assembly 16 it is possible, at extremely low dose per unit of time (i.e. few liters of detergent per unit of time) to make a very fine, even distribution of the detergent over the crockery such that an optimised result can be provided at minimised consumption. It is found out that if the assembly 16 is used to dispense a foaming liquid, the assembly 16 can provide a homogeneous, continuous, flattened cone shaped (i.e. fan shaped) jet.
  • This jet has in the one direction an apex between 60° and 120°, preferably approximately 80° and in the perpendicular direction an apex between 10° and 30°, preferably about 20°, with a consumption of at least essentially foamless detergent of approximately 5 l/hr to a maximum, preferably approximately 2 l/hr to a maximum. It is appreciated that the consumption of foamed detergent in liters per unit of time will be substantially higher.
  • the foam layer is removed from the crockery, preferably rinsed in one or more of the succeeding sections or phases.
  • the assembly 16 (see fig. 2-6) comprises two dispensing nozzles 17 that are each designed to eject a preferably powerful relevant jet 18, preferably a continuous, cohesive fluid jet, such as a jet foaming liquid.
  • the nozzles 17 are positioned such that the jets 18 mutually impact at a short distance from the relevant nozzle, preferably at or in the vicinity of, preferably upstream from the point, where from one or both jets a noticable quantity, e.g. at least 10 vol%, fluid has seperated in seperate particles (such as liquid or foam particles). While the jets 18 preferably diverge little (e.g.
  • the shape of the jet 19 is substantially cone- or fan shaped (with an apex of e.g. 80°).
  • the central longitudinal lines of the nozzles 17 preferably span an angle between about 60° and 120°, and said amgle is preferably at least about 90°.
  • the assembly 16 is designed such that the interdirected jets 18 at least essentially share at least one physical property, such as jet shape (e.g. cone or fan shape), jet dimension (e.g. diameter of the cross section), power of the jet (e.g. the exit pressure from the nozzle), the density of the fluid (e.g. foam like), the fluid type (e.g. a gas or liquid).
  • the interdirected jets 18 are at least essentially identical for a plurality of physical properties, among which the jet shape, jet dimension, fluid type, jet power, fluid density.
  • the skilled man will have no particular problems to determine the mutual location of the nozzles 17 by trail and error to get the desired properties of the common jet 19. It is appreciated that when the nozzles 17 or too far apart, the power of the jets can be decreased too much to provide the desired effect.
  • the assembly 16 is furthermore structured as follows: There is a top housing 21, mounted onto a base 22 and povoting around shaft 20. As such the attitude of the jet 19 can be changed as desired. Wedged between the housing 21 and the base 22 is the web 23 of a mounting 24, here an elongated rail. Within the housing 21 a fluid channel 25 extends between the nozzles 17, via a connecting channel 26 connecting to the feed channel 27 extending through the base 22. The channel 26 extends through the spigot 30 upwardly extending from the base 22 and providing a pivot for the housing 21.
  • the feed channael 27 has at one end a connecting stub 28 with enlarged diameter for connection to a fluid feed pipe (not shown).
  • the channel 27 has a connecting stub 29 with enlarged diameter for connection to a fluid exhaust pipe (not shown).
  • this assembly 16 can be connected to the fluid source (not shown) via the connecting stub 28, and a next assembly 16 (not shown) can be connected via the connecting stub 29, such that the respective channels 25 of two or more assemblies 16 are connected in parallel.
  • the channel 27 and the central part 17b of the nozzle 17 have at least essentially the same flow-through area, while the flow-trhough area of the channel 25 and the channel part 17c of the nozzle 17 connecting thereto are larger, with that of the channel 25 as largest.
  • the central part 17b of the nozzle 17 has e length such that a homogeneous flow is provided therein, for which said length is preferably at least approximately one time, more preferably at least approximately one and a half times the flow-through area thereof.
  • the flow-through area of the fluid supply line and fluid exhaust line are at least approximately equal to that of the channel 27.
  • the channel 27 and the central part 17b of the nozzle 17 have a flow-through area of at least approximately 4 mm, while the part 17a of the nozzle has a flow-through area of at least about 2 mm, the channel 25 has a flow-through area of at least about 6 mm, and the length of the part 17b of the nozzle measures at least approximately 6 mm.
  • the detergent is preferably liquid and contains e.g. an alkalic active substance and/or a sequestric active substance.
  • a convenient composition for machine dish washing contains NaOH or KOH, a water conditioning agent such as NTA, EDTA, fosfates, zeolites or fosfonates; sequestering agents; possibly further agents such as a bleaching agent; surfactants; and the rest water, and has a pH more than approximately 13, preferably about 13.5.
  • the concentration NaOH or KOH equals preferably more than about 10 wt%, more preferably more than about 20 wt%.
  • the detergent preferably contains a substance that degrades the foaming action at high temperatures, e.g. from about 40°C, such that after being rinsed from the crockery, the detergent does not result in foam problems within the dishwasher. Said substance can possibly be added to said detergent as soon as it is being used.
  • the foam generator 31 (see fig 7 and 8) comprises a preferably at least essentially cylindrical, hollow chamber 32, preferably at least essentially filled with a porous material 33.
  • the bottom of the chamber 33 contains an opening 34 for connection to a fluid supply line (not shown).
  • the chamber 32 contains two at least essentially diametrically opposed openings connecting to at least essentially radially directed pipe tubs 35, 36, such that fluid can be supplied to the chamber 32 in a substantially radial, diametrically opposite, direction.
  • said pipe tubs 35, 36 connect tangentially directed to the chamber 32.
  • the chamber 32 contains an exhaust opening 37.
  • the contents of the chamber is about 100 ml.
  • the contents of the chamber 32 is also determined by the number of assemblies 16 that is connected thereto.
  • the opening 34 is supplied with a boosting means, preferably a gastype fluid, such as air, supplied at a pressure essentially higher than atmospheric pressure, such as a pressure of preferably about 1 bar, and in a quantity of preferably at least 300 l/hr, more preferably about 1200 l/hr.
  • the line 35 supplies a fluid, such as a liquid, e.g. a diluting agent such as water, in a quantity of preferably about 2 l/hr.
  • the line 36 suppies a fluid such as liquid, e.g.
  • foaming action preferably at least essentially foam free, such as a highly concentrated aqueous detergent, in a quantity preferably about equal to that of the liquid supplied by the line 35.
  • essentially more gas than liquid is supplied to the chamber 32.
  • the ratio gas/liquid preferably amounts at least 100:1, more preferably at least 250:1, most preferably at least 500:1.
  • foaming agent such as a surfactant.
  • the foaming agent can also seperately supplied to the chamber 32.
  • the foam leaves the chamber 32 via the opening 37 and is due to the higher gas pressure within the chamber 32 compared to the gas pressure within the dishwasher pneumatically transferred to the assembly 16 and from there also pneumatically dispensed in the section 3.
  • the pneumatic transfer takes place at relatively low gas pressure.
  • the above described foam generator 31 can supply two or more assemblies 16 at one time. Good results have been obtained wherein a foam generator 31 supplied 3, 4, 5 or 6 assemblies 16 at one time, wherein the resulting foam of the generator 31 was essentially equally spread over the assemblies 16. While the liquid detergent was supplied to the generator 31 in a continuous, pulsating flow by using a peristaltic pump, an even, homogeneous and continuous flow exited the assemblies 16.
  • the supply line 35 or 36 is removed.
  • the chamber 32 is preferably relatively elongated, such as shown in the drawing.
  • the length of the foam chamber is preferably about twice its width. It was found out that the more elongated the chamber 32, the more mass of foam can be generated per unit of time. As such much foam can be dispensed with a chamber of relatively small volume.
  • the porous contents 33 of the chamber 32 determines preferably a labyrinth-type structure.
  • the contents 33 is preferably chemically resistant.
  • This porous material 33 is e.g. a three dimensional mesh structure of fine fibres, preferably made in a typical manner, such as e.g. comparable to material for scouring pads.
  • mats are made from fibre bundles and a number of these mats are stacked to become a thick slab. With a binding agent the fibres are mutually fixated. Then the slab is cut in pieces.
  • the fibres can be from e.g. Nylon or another plastic such as polyethene, glass or some other mineral or metal, such as (preferably stainless) steel.
  • the fibres follow preferably a random two-or threedimensional pattern.
  • the fibres preferably extend knotty through the material.
  • Alternatives for the fibrous filler are feasible, such as a granule filling of e.g. carbon granules.
  • a fibre filling is however prefered, since it is expected that this material takes minimum volume with respect to a maximum labyrinth-effect, while this material is relatively cheap.
  • One of the functions of the poroes filler 33 is safeguarding an even exhaust flow of foam from the chamber 32. It was found out that without filler 33, the foam exits the chamber 32 shockwise (sputtering).
  • An alternative solution to the problem of uneven exhaust flow of foam from the chamber 32 is the use of a filter or sieve type flow through member, e.g. positioned within the opening 37, or locating the porous material 33 within a length part of the exhaust line, connected to the opening 37.
  • the foam generator 31 can e.g. be located on an easily accessible location, e.g. at a distance from the dispensing section, preferably at the exterior of the housing 40 of the conveyor dishwasher. By providing the chamber 32 with a view window, the proper functioning of the foam generator 31 can easily be detected.
  • the foam transfer line (not shown) connected to the exhaust opening 37 of the foam generator and the connection stub 28 of the assembly preferably has a length such that possible shocks or other irregularities within the foam supply are damped.
  • the line may not be too long to prevent that the residense time of the foam becomes to large, resulting in essential degradation of the foam within said line such that it is not able any more to leave the assembly 16 essentially as foam.
  • the foam is preferably merely transported to the nozzle 17 by the fluid supplied to the chamber 32, such that the equipment is simplified and maintenance is limited.
  • the foam generator 31 and the assembly 16 are also applicable to other fields than diswashing and cleaning.

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  • Nozzles (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Detergent Compositions (AREA)
EP99202659A 1998-08-18 1999-08-18 Méthode pour délivrer un liquide, méthode pour générer de la mousse et dispositif mettant en oeuvre une telle méthode Withdrawn EP0980668A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1009889 1998-08-18
NL1009889 1998-08-18

Publications (2)

Publication Number Publication Date
EP0980668A2 true EP0980668A2 (fr) 2000-02-23
EP0980668A3 EP0980668A3 (fr) 2002-05-22

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EP99202659A Withdrawn EP0980668A3 (fr) 1998-08-18 1999-08-18 Méthode pour délivrer un liquide, méthode pour générer de la mousse et dispositif mettant en oeuvre une telle méthode

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006007233A1 (fr) * 2004-06-22 2006-01-19 Premark Feg L.L.C. Lave-vaisselle à tapis roulant et méthode pour utiliser celui-ci
EP1707100A2 (fr) * 2005-04-02 2006-10-04 Premark FEG L.L.C. Lave-vaisselle à convoyeur et tube de pulvérisation associé
EP1637059A3 (fr) * 2004-09-18 2008-07-23 Premark FEG L.L.C. Installation de lave-vaiselle
US7938913B2 (en) 2005-07-29 2011-05-10 Premark Feg L.L.C. Conveyor dishwasher and operating method for same
CN103547204A (zh) * 2011-05-20 2014-01-29 艺康美国股份有限公司 自动清洗方法和设备
WO2017190201A1 (fr) * 2016-05-06 2017-11-09 Rp Ideas Pty Ltd Appareil de lavage intensif
AU2018100261B4 (en) * 2016-05-06 2018-06-14 Rp Ideas Pty Ltd Heavy Duty Washing Apparatus
CN108354559A (zh) * 2018-04-18 2018-08-03 海底捞控股有限公司 火锅盆清洗装置
US10390675B2 (en) 2015-06-01 2019-08-27 Illinois Tool Works Inc. Warewash machine cleaning notification and in-situ dilution process

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4341350A (en) * 1980-09-05 1982-07-27 Otto Wemmer Chemical injection system for high pressure washers
US4790485A (en) * 1986-03-06 1988-12-13 Onoda Cement Company, Ltd. Gun head for powder painting
US5011330A (en) * 1990-08-08 1991-04-30 Rusmar Incorporated Foam distribution apparatus
EP0465454A1 (fr) * 1990-07-05 1992-01-08 Epenhuysen Chemie N.V. Procédé et pulvérisateur pour pulvériser un produit liquide concentré

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4341350A (en) * 1980-09-05 1982-07-27 Otto Wemmer Chemical injection system for high pressure washers
US4790485A (en) * 1986-03-06 1988-12-13 Onoda Cement Company, Ltd. Gun head for powder painting
EP0465454A1 (fr) * 1990-07-05 1992-01-08 Epenhuysen Chemie N.V. Procédé et pulvérisateur pour pulvériser un produit liquide concentré
US5011330A (en) * 1990-08-08 1991-04-30 Rusmar Incorporated Foam distribution apparatus

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006007233A1 (fr) * 2004-06-22 2006-01-19 Premark Feg L.L.C. Lave-vaisselle à tapis roulant et méthode pour utiliser celui-ci
CN1972624B (zh) * 2004-06-22 2010-10-27 浦瑞玛柯Feg有限责任公司 传送带式餐具清洗机及其运行方法
US8092614B2 (en) 2004-06-22 2012-01-10 Premark Feg L.L.C. Conveyor dishwasher comprising a plurality of final-rinse liquid spray jets and method of use thereof
EP1637059A3 (fr) * 2004-09-18 2008-07-23 Premark FEG L.L.C. Installation de lave-vaiselle
EP1707100A2 (fr) * 2005-04-02 2006-10-04 Premark FEG L.L.C. Lave-vaisselle à convoyeur et tube de pulvérisation associé
EP1707100A3 (fr) * 2005-04-02 2007-08-29 Premark FEG L.L.C. Lave-vaisselle à convoyeur et tube de pulvérisation associé
US7621286B2 (en) 2005-04-02 2009-11-24 Premark Feg L.L.C. Conveyor ware washer and spray pipe therefor
CN1839747B (zh) * 2005-04-02 2010-05-12 浦瑞玛柯Feg有限责任公司 传送式餐具洗涤机及其所用的喷射管
US7938913B2 (en) 2005-07-29 2011-05-10 Premark Feg L.L.C. Conveyor dishwasher and operating method for same
JP2014513626A (ja) * 2011-05-20 2014-06-05 エコラボ ユーエスエー インコーポレイティド 自動化された洗浄方法および装置
CN103547204A (zh) * 2011-05-20 2014-01-29 艺康美国股份有限公司 自动清洗方法和设备
JP2018086294A (ja) * 2011-05-20 2018-06-07 エコラボ ユーエスエー インコーポレイティド 自動化された洗浄方法および装置
CN108903876A (zh) * 2011-05-20 2018-11-30 艺康美国股份有限公司 自动清洗方法和设备
US10905305B2 (en) 2011-05-20 2021-02-02 Ecolab Usa Inc. Automated cleaning method and apparatus
CN108903876B (zh) * 2011-05-20 2022-04-12 艺康美国股份有限公司 自动清洗方法和设备
JP7067941B2 (ja) 2011-05-20 2022-05-16 エコラボ ユーエスエー インコーポレイティド 自動化された洗浄方法および装置
US10390675B2 (en) 2015-06-01 2019-08-27 Illinois Tool Works Inc. Warewash machine cleaning notification and in-situ dilution process
WO2017190201A1 (fr) * 2016-05-06 2017-11-09 Rp Ideas Pty Ltd Appareil de lavage intensif
AU2018100261B4 (en) * 2016-05-06 2018-06-14 Rp Ideas Pty Ltd Heavy Duty Washing Apparatus
CN108354559A (zh) * 2018-04-18 2018-08-03 海底捞控股有限公司 火锅盆清洗装置

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