EP3065851A1 - Unité de mélange et procédé pour la production améliorée de mousse à des fins de nettoyage - Google Patents

Unité de mélange et procédé pour la production améliorée de mousse à des fins de nettoyage

Info

Publication number
EP3065851A1
EP3065851A1 EP13792498.1A EP13792498A EP3065851A1 EP 3065851 A1 EP3065851 A1 EP 3065851A1 EP 13792498 A EP13792498 A EP 13792498A EP 3065851 A1 EP3065851 A1 EP 3065851A1
Authority
EP
European Patent Office
Prior art keywords
injector
mixing unit
housing
outlet
inlet
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
EP13792498.1A
Other languages
German (de)
English (en)
Other versions
EP3065851B1 (fr
Inventor
Rune OESTERGAARD SAYK
Flemming Asp
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.)
Nilfisk AS
Original Assignee
Nilfisk Advance AS
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=49596361&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP3065851(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Nilfisk Advance AS filed Critical Nilfisk Advance AS
Publication of EP3065851A1 publication Critical patent/EP3065851A1/fr
Application granted granted Critical
Publication of EP3065851B1 publication Critical patent/EP3065851B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/311—Injector mixers in conduits or tubes through which the main component flows for mixing more than two components; Devices specially adapted for generating foam
    • B01F25/3111—Devices specially adapted for generating foam, e.g. air foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31242—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/56—General build-up of the mixers
    • B01F35/561—General build-up of the mixers the mixer being built-up from a plurality of modules or stacked plates comprising complete or partial elements of the mixer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/003—Cleaning involving contact with foam

Definitions

  • the present invention pertains to a mixing unit for producing foam for cleaning pur- poses, a cleaning device with a mixing unit and a method of producing foam for cleaning purposes, particularly for use in the food manufacturing industries, for example for cleaning heavily soiled surfaces in the food processing area, for instance in meat and fish processing industries, vegetables processing or the pastry industry.
  • the cleaning device according to the invention may also be used for cleaning cars, tractors and other agricultural machines, which often get heavily soiled during use
  • FR 2 617 736 is disclosed a device which makes it possible by starting with, on the one hand, water under pressure and, on the other hand, water, to which chemical or bactericidal products have been added, to produce foam intended for cleaning surfaces or objects.
  • the device consists of two consecutive chambers. In the first cham- ber compressed air enters by means of a tube pierced with holes. Water under pressure, to which chemical products have been added, enters by means of the tube. Then the mixture of air under pressure and of water under pressure produces foam. This foam is conveyed into a decompression chamber, which completes the mixing of the products The volume of the chambers is calculated to obtain an optimum quality of the foam.
  • the device comprises a housing body having a first inlet for feeding pressurized water; a propulsion jet positioned behind the inlet and in a direction of flow; a collection jet positioned behind the propulsion jet, which is flow-connected with a second inlet for feeding a chlorine-free alkaline foam cleaning agent, and a third inlet for feeding a hydrogen peroxide solution; and a turbulence chamber, into which an elongated jet body of the collection jet extends, the turbulence chamber being fitted with a chamber inlet for feeding compressed air into the chamber, such that a hydrogen peroxide foam is formed from a solution formed upon dosing an effective amount of the hydrogen per- oxide solution into the chlorine-free alkaline foam cleaner at a maximum of 60 seconds prior to contact of the hydrogen peroxide foam with a surface to be cleaned, the turbulence chamber further having a chamber outlet, through which the hydrogen peroxide foam leaves the chamber to contact the surface, the chamber
  • a mobile foam producing unit which includes a first hose and hose assembly, and a second hose assembly. Water is provided to the mobile foam producing unit by a supply hose.
  • a foam gun provides for the dispensing of foam.
  • a sanitizer gun dispenses a sanitizing solution together with wa- ter, and in a second mode, i.e. a rinse mode, only water is dispensed from the sanitizer gun.
  • a cleaning device which device can supply cleaning fluid alone or mixed with water, air under pressure and chemicals. It has a mixing and dosing unit, which has input lines for the components and an output line for the components to supply them singly or mixed. There is a setting device between the input and output lines.
  • the setting device can mix all the components supplied and supply them indefinitely or in a dosed pattern, with at least one of the components blocked off.
  • the setting device may be in the form of a turning roller with a number of channels in it.
  • a mixing unit for supplying foam for cleaning, the mixing unit comprising the following main parts: a housing having a water inlet for receiving pressurized water, an air inlet for receiving pressurized air, a fluid outlet for said foam, and a first input line for a first cleaning agent, said mixing unit further comprising an injector positioned inside said housing, said injector having an injector inlet and an injector outlet, which injector inlet is fluidly con- nected to the first input line for a cleaning agent, and which injector outlet is fluidly connected to the fluid outlet of the housing, the injector inlet having a narrower cross section than the cross section of the injector outlet, wherein the injector is positioned within the mixing unit in such a way that a gap around the injector outlet is provided, said gap being fluidly connected to the air intet for allowing pressurized air to enter and pass through the gap and mix with the first cleaning agent at the fluid outlet of the housing.
  • the injector has a stepwise increasing circular cross section in the direction from the injector inlet towards the injector outlet.
  • the injector has a continuously (i.e. stepless) increasing circular cross section in the direction from the injector inlet towards the injector outlet.
  • a continuously (i.e. stepless) increasing circular cross section in the direction from the injector inlet towards the injector outlet.
  • the inner dimensions of the housing have a cylindrical shape adjacent to the fluid outlet and wherein the injector outlet is positioned eo-axiaily relative to said housing at the fluid outlet,
  • the pressurized air is distributed evenly around the injector outlet and flows in substantially the same direction as the mix of water and first cleaning agent.
  • these inner dimensions of the hous- ing are provided by a bore in the housing
  • the injector is exchangeable, for example by providing the mixing unit and injector with mutually cooperating attachment means for releasaole attachment of the injector within the mixing unit
  • the injector is exchangeable with another injector having a different injector inlet area and/or a different injector outlet area. This is particularly desirable in situations wherein it is desired to provide a different type of foam or a different quantity of foam.
  • the injector inlet opening is circular with a diameter of between 1 mm and 10 mm.
  • the injector is chosen in dependence of a variety of parameters, such as the type of foam, which is desired to be used in a particular cleaning operation, the available water and/or air pressure, or the type of first cleaning agent, which is availa- ble.
  • the ratio between the area of the gap and the inlet area of the injector is varied in dependence of any of the above mentioned parameters.
  • the ratio between the area of the gap and the area of the injector inlet is a constant for a given inner cross-sectional area of the housing at the fluid outlet for all injectors usable in connection with the mixing unit.
  • the injector is exchangeable with another injector having a different injector inlet area and/or a different injector outlet area.
  • the housing further comprises at least a second input line for a second cleaning agent, said second input line being fluidly connected to the injector inlet.
  • a mixing unit wherein several added properties may be added to the foam
  • the first cleaning agent may mainly be responsible for the foaming, while the second may be responsible for imparting to the foam certain cleaning properties.
  • a more flexible mixing unit is achieved, which may be adjusted to provide a type of foam, which is optimized for the particular cleaning opera- tion at hand.
  • the housing further comprises at least a second input line for a second cleaning agent and an additional injector having an injector inlet which is fluidly connected to the se- cond input line, and an injector outlet fluidly connected to outlet of the housing.
  • the mixing unit comprises switching means for switching between the provision of water alone and water mixed with the first cleaning agent and air for the provision of foam.
  • the mixing unit comprises switching means for switching between the provision of water alone and water mixed with the first cleaning agent and air for the provision of foam, and water mixed with the second cleaning agent.
  • Cleaning procedures used in for example the food producing industry typically involve an initial flushing/wetting of the contaminated area, surfaces, processing machines and other equipment, which need to be cleaned. This flushing is usually followed by appl i cation of foam to said area, surfaces, processing machines and other equipment. This foam is then flushed away after a certain period of time. Finally, said area, surfaces, processing machines and other equipment is disinfected by the application of a disinfectant. In some cases this disinfectant is removed by the flushing with clean water. This means that there is typically a successive change between the following pro- cedures: - Flushing with water alone
  • the pressurized water is provided by a water pump to the water inlet of the housing of the mixing unit.
  • the mixing unit is manufactured from a metal alloy, e g stainless steel.
  • a metal alloy e g stainless steel.
  • the provided pressurized water has a pressure of between 4 bar and 50 bar, preferably between 10 bar and 25 bar, and the provided pressurized air has a pressure of between 2 bar and 10 bar, more preferable a pressure of between 4 bar and 6 bar, wherein the provided pressurized air always has a lower pressure than the pressure of the provided pressurized water.
  • a cleaning device comprising a mixing unit according to any of the embodiments described above.
  • the compressor, mixing unit, and water pump may according to some embodiments of the cleaning device according to the invention be placed inside a cleaning device housing
  • said cleaning device housing is placed on a wheeled chassis, whereby a mobile cleaning device is provided.
  • the air gap completely surrounds the outlet opening of the injector.
  • the method may according to a further embodiment comprise the step of changing the quantity of foam produced per time unit by exchanging the injector with another injector having a different injector inlet area and/or a different injector outlet area.
  • the method may according to a yet further embodiment comprise the step of changing the quantity of foam produced per time unit by exchanging the injector with another injector having a different injector inlet area and/or a different injector outlet area, and keeping the water pressure and air pressure unaltered.
  • the method may according to a further embodiment comprise the step of choosing the injector, and thereby the injector inlet and outlet area in dependence of what kind of foam is to be produced and/or what kind of first cleaning agent is to be used for creating said foam.
  • the method may according to a further embodiment comprise the step of choosing the injector, and thereby the injector inlet and outlet area in dependence of the available water pressure and/or available air pressure.
  • the ratio between the area of the gap and the area of the injector inlet is a constant for one different injector that is used to change the quantity of foam produced
  • One mixing unit A which is a mixing unit according to the invention, where air is blown in to the mixing unit around the injector opening and in a direction parallel to the flow of fluid out of the injector opening
  • a mixing unit B wherein the air is blown into the mixing unit though a hole downstream and beside the injector outlet and in a direction substantially parallel to the flow of fluid out of the injector.
  • the two mixing units A and B were then used to generate foam, which was blown onto a vertical, smooth wall sur- face.
  • each mixing unit was used to generate foam into a 200 'iter plastic barrel, and the time it took to fill each barrel was measured.
  • the results of these barrel tests were that the barrel which received foam from mixing unit A was filled with foam in a considerably shorter time than the barrel which received foam from mixing unit B, Since both mixing units in all experiments were supplied the same quantity of cleaning agent, water and air under equal pressure conditions, it may be concluded from these experiments that the foaming facilitated by the mixing unit ac- cording to the invention is significantly more effective than those known in the art.
  • Fig. 1 shows a cross section of an embodiment of a mixing unit according to the in- vention
  • FIG. 2 shows a perspective view of the same embodiment of a mixing unit as in Fig. 1
  • Fig. 3 shows another cross section of a mixing unit
  • Fig. 4 shows the same cross section as in Fig. 3. but wherein the mixing unit comprises a different injector.
  • Fig. 1 shows a cross section of an embodiment of a mixing unit 2 for supplying foam 4 for cleaning.
  • the illustrated mixing unit 2 comprises a housing 6 having a water inlet 8 for receiving pressurized water, indicated by the arrow 10.
  • the water is supplied to the housing 6 via a suitable pipe 12.
  • the housing 6 also has an air inlet 14 for receiving pressurized air. indicated by the arrow 16, a fluid outlet 18 for said foam 4, and a first input line 20 for a first cleaning agent, indicated by the arrow 22.
  • the air is supplied to the housing 6 via a suitable pipe 24, which is preferable connected with a compressor ⁇ not shown), and the first chemical agent is supplied to the housing 6 via a suitable pipe 26 which is in fluid communication with a reservoir ⁇ not shown).
  • the water pipe 12 is fluidly connected to a water pump ⁇ not shown) for supplying pressurized water to the housing 6 of the mixing unit 2.
  • the mixing unit 2 further comprises an injector 28 positioned inside the housing 6.
  • the injector 28 has an injector inlet 30 and an injector outlet 32, which injector inlet 30 is fluidly connected to the first input line 20 for a cleaning agent, and which injector outlet 32 is fluidly connected to the fluid outlet 18 of the housing 6.
  • the injector inlet 30 has a narrower cross section than the cross section of the injector outlet 32.
  • the injector 28 is positioned within the mixing unit 2 for providing a gap 34 around the injector outlet 32.
  • This gap 34 is fluidly connected to the air inlet 14 of the housing 6 for allowing air to pass between the injector outlet 32 and the housing 6 and mix with the first cleaning agent at the fluid outlet 18 of the housing 6.
  • Fig. 2 shows a partial perspective view of the embodiment of a mixing unit 2 illustrated in Fig. 1 ,
  • air indicated by arrows 16
  • said air will be evenly distributed around the injector cutlet 32 before it becomes mixed with the mix of water and first cleaning agent (said mix being indicated by arrow 36), thereby leading to a more effective foam production (se e.g. test results).
  • the illustrated injector 28 has a continuously (i.e. stepless) increasing circular cross section in the direction from the injector inlet 30 towards the injector outlet 32.
  • the inner dimensions of the housing 6 have a cylindrical shape adjacent to the fluid outlet 18, and the injector outlet 32 is positioned co-axially relative to said opening in the housing 6 at the fluid outlet 18.
  • the pressurized air (indicated by the arrows 16) is distributed evenly around the injector cutlet 32 and flows in substantially the same direction as the mix of water and first cleaning agent ⁇ said mix being indicated by the arrow 36).
  • these inner dimensions of the housing 6 are provided by a bore in the housing 6.
  • Fig. 3 and Fig. 4 shows the same cross section of a mixing unit 2 wherein two different injectors 28 are placed.
  • the illustrated injectors 28 are exchangeable, for example by providing the mixing unit 2 and injectors 28 with mutually cooperating attachment means, such as mutually cooperating threading 41 and 43 in the injector housing 47 and housing 6 of the mixing unit 2, for releasable attachment of the injectors 28 within the housing 6 of the mixing unit 2.
  • DF is the diameter of the cylin- drical bore in the housing 6 of the mixing unit 2, wherein the injector 28 is placed. DF is fixed.
  • dV is the diameter of the injector inlet opening 30, and DV is the outer diameter of the injector 28 at the injector outlet opening 32. While DF Is fixed, dV and DV may have varying values for different injectors 28.
  • the mixing unit 2 illustrated in Fig. 4 is equipped with an injector having a larger dV for providing more foam 4. However, since more water is needed, DV has been made correspondingly smaller in order to provide for a larger gap 34 between the injector outlet opening 32 and the housing 6 in order to provide foam having substantially the same properties as the foam generated by the missing unit 2 illustrated in Fig 3.
  • the ratio between the area of the gap 34 and the area of the injector inlet 30 may be a constant for a given inner cross-sectional area (defined by DF in the illustrated embodiment) of the housing 6 at the fluid outlet 18 for all injectors 28 usable in connection with the mixing unit 2.
  • this embodiment enables an operator using the mixing unit 4 to alter the quantity of foam 4 produced without detrimentally altering the properties of the foam 4, because the ratio between water and air is maintained.
  • the air gap 34 completely surrounds the outlet opening 32 of the injector 28.
  • the ratio between the area of the gap 34 and the inlet opening 30 of the injector 28 is not a constant, but instead chosen in dependence of what kind of foam 4 is to be produced and/or the quantities needed, and/or available pressure of the water and/or air,
  • the mixing unit 2 of the housing 6 may further comprise at least one second, optional input line 38 for a second cleaning agent (indicated by the arrow 40), which second input line 38 must be fluidly connected to the injector inlet 32.
  • This second cleaning agent is supplied to the housing of the mixing unit 2 via a pipe 42 from a reservoir (net shown)
  • a bore 46 is provided in the housing 6. This bore 46 may be used to align the Input l.nes for the first, and further optional, cleaning agents with the corresponding input apertures in the injector housing 47, when it is screwed into the housing 6 of the mixing unit 2 using the threading 41 and 43.
  • two O-rings 44 and 45 manufactures from a surtable type of rubber is provided as packing means between the injector housing 47 and housing 6 of the mixing unit 2.
  • the illustrated mixing unit 2 is manufactured from a metal alloy, e.g. stainless steel. Hereby is obtained a robust mixing unit 2, which can withstand pressures up to 60 bar without malfunction or any noticeable leakage.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

L'invention concerne une unité de mélange (2) pour fournir une mousse 4 pour le nettoyage, l'unité de mélange (2) comprenant un injecteur (28) placé à l'intérieur en formant un espace (34) autour de la sortie de l'injecteur (32), ledit espace (34) étant en connexion fluidique avec une entrée d'air (14) du boîtier (6) de l'unité de mélange (2) pour permettre le passage de l'air entre la sortie de l'injecteur (32) et le boîtier (6) et son mélange avec le premier agent de nettoyage et de l'eau à la sortie de fluide (18) du boîtier (6). L'invention concerne également un dispositif de nettoyage comprenant cette unité de mélange (2) et un procédé de production de mousse pour le nettoyage.
EP13792498.1A 2013-11-05 2013-11-05 Unité de nettoyage et procédé pour la production améliorée de mousse à des fins de nettoyage Active EP3065851B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2013/059912 WO2015067989A1 (fr) 2013-11-05 2013-11-05 Unité de mélange et procédé pour la production améliorée de mousse à des fins de nettoyage

Publications (2)

Publication Number Publication Date
EP3065851A1 true EP3065851A1 (fr) 2016-09-14
EP3065851B1 EP3065851B1 (fr) 2020-01-08

Family

ID=49596361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13792498.1A Active EP3065851B1 (fr) 2013-11-05 2013-11-05 Unité de nettoyage et procédé pour la production améliorée de mousse à des fins de nettoyage

Country Status (3)

Country Link
EP (1) EP3065851B1 (fr)
DK (1) DK3065851T3 (fr)
WO (1) WO2015067989A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106895175A (zh) * 2017-03-27 2017-06-27 九牧厨卫股份有限公司 一种发泡装置和龙头

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3302817B1 (fr) * 2015-06-03 2021-04-28 Marcello STRACCIA Dispositif de distribution de mousse
DK179378B1 (en) * 2016-11-08 2018-05-28 Nilfisk Food As Mixing unit with replaceable injector

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2630183A (en) * 1950-01-26 1953-03-03 Foutz Clinton Root Apparatus for forming and projecting a foam mixture
US3073534A (en) * 1960-05-27 1963-01-15 Goodyear Aircraft Corp Nozzle for spraying a mixture of fibers and resin
US4505431A (en) * 1982-06-14 1985-03-19 Spraco, Inc. Apparatus for discharging three commingled fluids _
US4802630A (en) 1985-11-19 1989-02-07 Ecolab Inc. Aspirating foamer
FR2617736A1 (fr) 1987-07-08 1989-01-13 Sampson Cat Dispositif de production d'emulsion, en vue du nettoyage et de la desinfection
DE29605357U1 (de) 1996-03-22 1996-06-05 Platz Reinigungssysteme Gmbh Reinigungsvorrichtung
DE19644653A1 (de) 1996-10-26 1998-04-30 Diversey Gmbh Verfahren und Vorrichtung zur Reinigung von mit Fett-, Stärke- und/oder Eiweißschmutz hochbelasteten Flächen, insbesondere in der Lebensmittelindustrie
US7516907B2 (en) 2007-05-04 2009-04-14 Ecolab Inc. Mobile foam producing unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106895175A (zh) * 2017-03-27 2017-06-27 九牧厨卫股份有限公司 一种发泡装置和龙头
CN106895175B (zh) * 2017-03-27 2023-04-14 九牧厨卫股份有限公司 一种发泡装置和龙头

Also Published As

Publication number Publication date
DK3065851T3 (da) 2020-04-06
WO2015067989A1 (fr) 2015-05-14
EP3065851B1 (fr) 2020-01-08

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