EP3065851B1 - Reinigungseinheit und verfahren zur verbesserten herstellung von schaum für reinigungszwecke - Google Patents

Reinigungseinheit und verfahren zur verbesserten herstellung von schaum für reinigungszwecke Download PDF

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EP3065851B1
EP3065851B1 EP13792498.1A EP13792498A EP3065851B1 EP 3065851 B1 EP3065851 B1 EP 3065851B1 EP 13792498 A EP13792498 A EP 13792498A EP 3065851 B1 EP3065851 B1 EP 3065851B1
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Prior art keywords
injector
outlet
housing
inlet
foam
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English (en)
French (fr)
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EP3065851A1 (de
Inventor
Rune OESTERGAARD SAYK
Flemming Asp
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Nilfisk AS
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Nilfisk AS
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    • 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 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 chamber 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.
  • US 5,855,217 discloses a method according to the preamble of claim 1 and a cleaning device according to the preamble of claim 9.
  • a device for cleaning surfaces in the food industry 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 peroxide 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
  • 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 water
  • 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 cleaning device comprising a mixing unit.
  • 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.
  • the inner dimensions of the housing have a cylindrical shape adjacent to the fluid outlet and the injector outlet is positioned co-axially 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 housing 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 releasable 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 available.
  • 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 operation 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 second 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 application 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 procedures:
  • one device for the provision of water e.g. a water hose or high-pressure cleaner
  • one device for foaming e.g. a water hose or high-pressure cleaner
  • one device for foaming e.g. a water hose or high-pressure cleaner
  • one device for the provision of the disinfectant e.g. a water hose or high-pressure cleaner
  • one device for foaming e.g. a foaming agent
  • one device for the provision of the disinfectant e.g. a single mixing unit with switching means as described above, it is possible to successively change between all of the above-mentioned cleaning processes.
  • the second cleaning agent is a disinfectant
  • the first cleaning agent is a foaming agent when being mixed with water and pressurized air, e.g. from compressor
  • an operator merely needs to switch successively between three processes.
  • there is no need to change equipment which is both time saving and reduces the risks of errors.
  • 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 10 bar and 25 bar.
  • 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.
  • 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 surface.
  • each mixing unit was used to generate foam into a 200 liter 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 according 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 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 outlet 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 outlet 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 cylindrical 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.
  • 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.
  • 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 (not shown).
  • a bore 46 is provided in the housing 6. This bore 46 may be used to align the input lines 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 suitable 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.

Claims (15)

  1. Verfahren zur Herstellung von Schaum (4) für Reinigungszwecke, wobei das Verfahren die folgenden Schritte umfasst:
    - Leiten von Druckwasser in ein Gehäuse (6) einer Mischeinheit (2) und durch einen im Gehäuse angeordneten (6) Injektor (28), wobei im Injektor (28) während des Durchlaufs des Wassers durch den Injektor (28) von einem Injektoreinlass (30) des Injektors (28) gegen einen Injektorauslass (32) des Injektors (28) einen Unterdruck entsteht, der veranlasst, dass ein Reinigungsmittel in den Injektor (28) durch eine erste Eingangsleitung (20), die mit einem Reinigungsmittelreservoir fluidverbunden ist, eingesaugt wird, wobei das Reinigungsmittel im Injektor (28) mit dem Wasser gemischt wird, während des Durchlaufs des Wassers in die Richtung des Injektorauslasses (32), und
    - Leiten von Druckluft in das Gehäuse (6) der Mischeinheit (2), und durch eine Lücke (34) zwischen dem Gehäuse (6) und dem Injektorauslass (32) in eine zum Durchfluss von dem mit Reinigungsmittel gemischten Wasser aus dem Injektorauslass (32) des Injektors (28) im Wesentlichen parallele Richtung läuft, wodurch Schaum (4) erzeugt wird, wenn die Druckluft mit dem Wasser und Reinigungsmittel gemischt wird, vor dem Austritt aus dem Gehäuse (6) durch einen Fluidauslass (18) im Gehäuse (6), dadurch gekennzeichnet, dass die Lücke (34) so abgesteckt ist, dass sie zwischen einem Kreisquerschnitt des Injektors (28) an oder neben dem Injektorauslass (32) und Innenabmessungen des Gehäuses (6) mit einer zylindrischen Form neben dem Fluidauslass (18) läuft, wobei der Injektorauslass (32) koaxial zur Öffnung im Gehäuse (6) am Fluidauslass (18) angeordnet ist, und wobei das Druckwasser einen Druck von zwischen 10 bar und 25 bar ausweist.
  2. Verfahren nach Anspruch 1, wobei die Druckluft einen niedrigeren Druck aufweist als der Druck des Druckwassers.
  3. Verfahren nach einem jeglichen der vorherstehenden Ansprüche, wobei die Druckluft einen Druck von zwischen 2 bar und 10 bar aufweist, bevorzugt einen Druck von zwischen 4 bar und 6 bar.
  4. Verfahren nach einem jeglichen der vorherstehenden Ansprüche, das ferner den Schritt umfasst, die pro Zeiteinheit erzeugte Schaummenge (4) dadurch zu ändern, dass der Injektor (28) mit einem anderen Injektor (28) mit einer anderen Injektoreinlassfläche (30) und/oder einer anderen Injektorauslassfläche (32) ausgetauscht wird.
  5. Verfahren nach einem jeglichen der Ansprüche 1-4, das ferner den Schritt umfasst, die pro Zeiteinheit erzeugte Schaummenge (4) dadurch zu ändern, dass der Injektor (28) mit einem anderen Injektor (28) mit einer anderen Injektoreinlassfläche (30) und/oder einer anderen Injektorauslassfläche (32) ausgetauscht wird, und dabei den Wasserdruck und den Luftdruck unverändert hält.
  6. Verfahren nach einem jeglichen der vorherstehenden Ansprüche, das ferner den Schritt umfasst, den Injektor (28) und dabei die Injektoreinlassfläche (30) und -Auslassfläche (32) auszuwählen, je nachdem welcher Typ von Schaum (4) zu erzeugen ist und/oder welcher Typ von erstem Reinigungsmittel zur Erzeugung dieser Schaum (4) anzuwenden ist.
  7. Verfahren nach einem jeglichen der vorherstehenden Ansprüche, das ferner den Schritt umfasst, den Injektor (28) und dabei die Injektoreinlassfläche (30) und -Auslassfläche (32) auszuwählen, abhängig vom verfügbaren Wasserdruck und/oder verfügbaren Luftdruck.
  8. Verfahren nach einem jeglichen der vorherstehenden Ansprüche, wobei das Verhältnis zwischen der Fläche der Lücke (34) und der Fläche des Injektoreinlasses (30) eine Konstante ist für einen anderen Injektor (28), der dafür angewandt wird, die erzeugte Schaummenge (4) zu ändern.
  9. Reinigungseinheit zum Durchführen vom Verfahren nach einem jeglichen der Ansprüche 1-8, wobei die Reinigungseinheit umfasst:
    eine Mischeinheit (2) für Versorgung von Schaum (4) für Reinigungszwecke, wobei die Mischeinheit (2) umfasst:
    ein Gehäuse (6) mit einem Wassereinlass (8) für die Einnahme von Druckwasser, einem Lufteinlass (14) für die Einnahme von Druckluft, einem Fluidauslass (18) für den Schaum (4), und einer ersten Eingangsleitung (20) für ein erstes Reinigungsmittel,
    wobei die Mischeinheit (2) ferner einen im Gehäuse (6) angeordneten Injektor (28) umfasst, wobei der Injektor (28) einen Injektoreinlass (30) und einen Injektorauslass (32) aufweist, wobei der Injektoreinlass (30) zur ersten Reinigungsmittel-Eingangsleitung (20) fluidverbunden ist, und wobei der Injektorauslass (32) zum Fluidauslass (18) des Gehäuses fluidverbunden ist, wobei der Injektoreinlass (30) einen schmaleren Querschnitt aufweist als der Querschnitt des Injektorauslasses (32), wobei der Injektor (28) in der Mischeinheit (2) so angeordnet ist, dass eine Lücke (34) um den Injektorauslass (32) bereitgestellt wird, wobei diese Lücke (34) zum Lufteinlass (14) fluidverbunden ist, um den Eintritt und Durchgang der Druckluft durch die Lücke (34) zu ermöglichen sowie auch die Mischung mit dem ersten Reinigungsmittel und Wasser am Fluidauslass (18) des Gehäuses (6),
    dadurch gekennzeichnet, dass die Lücke (34) so abgesteckt ist, dass sie zwischen einem Kreisquerschnitt des Injektors (28) an oder neben dem Injektorauslass (32) und den Innenabmessungen des Gehäuses (6) mit einer zylindrischen Form neben dem Fluidauslass (18) läuft, wobei der Injektorauslass (32) koaxial zur Öffnung im Gehäuse (6) am Fluidauslass (18) angeordnet ist, und dass die Reinigungseinheit ferner eine Wasserpumpe umfasst für die Versorgung vom Druckwasser zum Wassereinlass (8) des Gehäuses (6) der Mischeinheit (2) bei einem Druck von zwischen 10 bar und 25 bar.
  10. Reinigungseinheit nach Anspruch 9, wobei der Injektor (28) einen schrittweise zunehmenden Kreisquerschnitt in die Richtung vom Injektoreinlass (30) gegen den Injektorauslass (32) aufweist.
  11. Reinigungseinheit nach Anspruch 9, wobei der Injektor (28) einen kontinuierlich zunehmenden Kreisquerschnitt in die Richtung vom Injektoreinlass (30) gegen den Injektorauslass (32) aufweist.
  12. Reinigungseinheit nach einem jeglichen der Ansprüche 9-11, wobei die Innenabmessungen des Gehäuses (6) durch eine Bohrung (46) im Gehäuse (6) bereitgestellt werden.
  13. Reinigungseinheit nach einem jeglichen der Ansprüche 9-12, wobei der Injektor (28) durch einen anderen Injektor (28) mit einer anderen Injektoreinlassfläche (30) und einer anderen Injektorauslassfläche (32) austauschbar ist.
  14. Reinigungseinheit nach Anspruch 13, wobei, für eine gegebene innere Querschnittsfläche des Gehäuses (6) am Fluidauslass (18), das Verhältnis zwischen der Fläche der Lücke (34) und der Fläche des Injektoreinlasses (30) eine Konstante ist.
  15. Reinigungseinheit nach Anspruch 13, wobei das Verhältnis zwischen der Fläche der Lücke und der Fläche des Injektoreinlasses (30) eine Konstante ist.
EP13792498.1A 2013-11-05 2013-11-05 Reinigungseinheit und verfahren zur verbesserten herstellung von schaum für reinigungszwecke Active EP3065851B1 (de)

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PCT/IB2013/059912 WO2015067989A1 (en) 2013-11-05 2013-11-05 Mixing unit and method for improved production of foam for cleaning purposes

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EP3065851A1 EP3065851A1 (de) 2016-09-14
EP3065851B1 true EP3065851B1 (de) 2020-01-08

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016193925A1 (en) * 2015-06-03 2016-12-08 Straccia Marcello Foam dispensing device
DK179378B1 (en) * 2016-11-08 2018-05-28 Nilfisk Food As Mixing unit with replaceable injector
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

Citations (6)

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EP3065851A1 (de) 2016-09-14
WO2015067989A1 (en) 2015-05-14

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