EP0797484B1 - Verfahren und einrichtung zum aufbringen von reinigungs- oder desinfektionsschaum auf eine oberfläche - Google Patents

Verfahren und einrichtung zum aufbringen von reinigungs- oder desinfektionsschaum auf eine oberfläche Download PDF

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Publication number
EP0797484B1
EP0797484B1 EP95901622A EP95901622A EP0797484B1 EP 0797484 B1 EP0797484 B1 EP 0797484B1 EP 95901622 A EP95901622 A EP 95901622A EP 95901622 A EP95901622 A EP 95901622A EP 0797484 B1 EP0797484 B1 EP 0797484B1
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EP
European Patent Office
Prior art keywords
pressure
foam
bars
spray
head
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.)
Expired - Lifetime
Application number
EP95901622A
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English (en)
French (fr)
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EP0797484A1 (de
Inventor
Steven Mulder
Frank Paul Herman De Block-Bury
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.)
De Block-Bury Frank Paul Herman
Original Assignee
BLOCK BURY FRANK PAUL HERMAN D
De Block-Bury Frank Paul Herman
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Filing date
Publication date
Application filed by BLOCK BURY FRANK PAUL HERMAN D, De Block-Bury Frank Paul Herman filed Critical BLOCK BURY FRANK PAUL HERMAN D
Publication of EP0797484A1 publication Critical patent/EP0797484A1/de
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Publication of EP0797484B1 publication Critical patent/EP0797484B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/0018—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam
    • B05B7/0025—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam with a compressed gas supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/26—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device
    • B05B7/262—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device a liquid and a gas being brought together before entering the discharge device
    • 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 invention relates to a method for the application of a layer of foam to a surface for the purposes of cleansing and/or disinfecting the surface, whereby foam emanating from a spray-head held at a distance from the surface is sprayed in volume and under pressure, whereby a layer of foam which uniformly covers the surface is formed.
  • the invention additionally relates to a foam-spraying apparatus for the implementation of the method, containing a spray-head, mixing means equipped with a number of connection-openings to which supply pipes are connected for the supply under pressure of water, compressed air and a foaming product, and a connecting pipe which connects the spray-head to a mixing channel.
  • EP-A-0466663 describes and shows such a device for foaming a surface.
  • This device comprises a couple of tanks containing detergent and water respectively, which are held under air pressure during operation. Further this device comprises a lance having a mixing chamber.
  • foam-cleaning for the cleansing of floors, walls and machines.
  • This is a procedure for the application of a detergent or other soaking agent, whereby use is made of the cleansing power of the product itself, or of an additive, in order to cover the surfaces to be cleansed with a layer of foam which remains more or less adherent to the surfaces for quite some time.
  • Advantages of this method include, among others, the what longer contact time (foam dries more slowly than liquid product), the ready visualisation of the work done (it is immediately apparent which surfaces have already been treated and which have not), and the product-savings (the product adheres to the surface and does not flow immediately towards the floor).
  • the method in accordance with the invention has the features set out in claim 1 is sprayed with a concentrated jet under a pressure of at least 4 bars and in a volume of at least 150 liters per minute.
  • the method according to the invention works with a large-volume flow of foam under high pressure.
  • the foam distribution is achieved by virtue of the impact on the surface being treated.
  • the method according to the invention which is based on the effect of the impact of the foam on the surface, a time savings of some 70% or more can be achieved compared to the known low-pressure foam method. Where, for example, 30 minutes used to be necessary for a given surface, the treatment can now be realised in less than 10 minutes.
  • a further advantage of the method is that it allows surfaces to be treated from large distances, whereby the assistance of such aids as lifts or ladders will be less frequently required.
  • a result of this is that foam cleansing is likely to be carried out more often, leading to a further time advantage and improving the general hygiene inside and outside the companies.
  • An embodiment of a method is characterized in that the foam is sprayed at a distance of at least 4 meters from the surface, under a pressure of at least 4 bars and in a volume of at least 150 litres per minute at the surface.
  • a further embodiment of the method according to the invention is characterised in that the foam is sprayed at a distance of at least 8 meters from the surface, under a pressure of at least 5 bars and in a volume of at least 350 liters per minute at the surface.
  • This method can be applied to advantage if larger surfaces need to be treated, provided that sufficient space is available to allow spraying from this necessarily large distance.
  • the effect is achieved by means of a method which requires certain minimum values with respect to distance, pressure and volume, and which is not limited in any way to certain maximum values of distance, pressure and volume. In fact, in theory, all values above the aforementioned minima can be applied.
  • An advantageous embodiment of the method according to the invention is characterised in that the foam is sprayed at a distance of between 10 and 16 meters from the surface, under a pressure of between 5.5 and 6 bars and in a volume of between 400 and 600 liters per minute at the surface.
  • the method of the invention has the features set out in claim 3.
  • the spray-head has a cylindrical shape and in that during operation of the apparatus, a pressure exists in the supply pipe for the foam products of at least 5 bars and a volume-flow is present with a rate of at least 0.3 liters per minute, and that, in the supply pipe for compressed air, a pressure of at least 5 bars exists, and that, in the supply pipe for water, a pressure of at least 5 bars exists and a volume-flow is present with a rate of at least 15 liters per minute, and that, in the connecting pipe close to the spray-head, a pressure of at least 4 bars exists and a volume-flow is present with a rate of at least 150 liters per minute.
  • a sufficiently strong foam jet can be achieved to realise the new impact effect in accordance with the invention.
  • An advantageous embodiment of the foam spraying apparatus is characterised in that during operation of the apparatus, a pressure exists in the supply pipe for the foam products of approximately 6 bars and a volume-flow is present with a rate of about 1.5 liters per minute, and that, in the supply pipe for compressed air, a pressure of at about 8 bars exists, and that, in the supply pipe for water, a pressure of approximately 6 bars exists and a volume-flow is present with a rate of about 30 liters per minute, and that, in the connecting pipe close to the spray-head, a pressure of about 5.5 bars exists and a volume-flow is present with a rate of about 400 liters per minute.
  • a first version of the invention contains a mobile reservoir with an automated filling installation. This is achieved by means of sucking a vacuum in the tank with the aid of a Ventur-apparatus, whereby the product is sucked out of its original packaging. During the operation of the apparatus, the vacuum pump is automatically rinsed.
  • Another version of the invention is additionally equipped with a level-indication on the tank, containing a float which rises and drops via a straight and a spiral-shaped guide, whereby a needle is made to turn, whereby the level of the reservoir can be read from a scale.
  • Another version of the invention is equipped with protection against wasting product: a water-controlled valve blocks the supply of compressed air to the reservoir if the water pressure is insufficient.
  • Another version of the invention is equipped with automatic air-bleeding when the tank is at rest.
  • Another version of the invention is equipped with two types of pistol; one for a flat, wide jet and one for a straight jet.
  • Another version of the invention is embodied with a bypass to go around the foam portion so that the system can be used for later rinsing purposes.
  • Another version of the invention is equipped with a selection-tap so that it is possible to operate with varying concentrations of the product.
  • Figure 1 schematically depicts an exemplary embodiment of a foam spraying device 1 which is constructed around a mixing channel 3 formed by a hollow metal cylinder which is connected to a spray-head 7 via a connecting pipe 5.
  • the spray-head 7 has a circular-cylindrical form for the realisation of a concentrated foam spray 9.
  • a connecting mouth 11 for the connection of a (non-depicted) high-pressure water supply is situated at one extreme of the mixing channel 3.
  • two further connecting mouths 13, 15 are situated on the mixing channel 3.
  • One of these connecting mouths 13 is connected via a supply pipe 16 to a storage tank 17 within which a foam product 19 is located.
  • a supply pipe 21 for compressed air is connected to the other connecting mouth 15, which supply pipe can be connected with an extreme 23 of a (non-depicted) compressed-air source.
  • the connecting pipe 21 has yet another branch 25 which leads to the supply tank 17, whereby the foam product 19 can be transported under pressure to the mixing channel 3.
  • the supply tank 17 it is possible to attach other (non-depicted) supply tanks with different foam products, whereby by means of switching the connection of the supply pipe 16 to another supply tank, it is possible to apply these other foam products.
  • another dosage-system instead of working with supply tanks, it is also possible to connect another dosage-system to the supply pipe 16.
  • the total system can be affixed to a movable trolley and can also be equipped with a compressor for the provision of the compressed air.
  • the spraying can be commenced by means of opening (non-depicted) external water and compressed air taps.
  • taps can be mounted on the apparatus, with which taps the water current and compressed air current can be regulated.
  • the foam products it is possible to use alkaline products with a pH value between 0 and 14, acidic foaming cleansing products or a disinfecting foaming product.
  • the advantageous effect commences at a water-pressure value of 5 bars (preferably 10 bars) and a water current of 15 liters per minute (preferably 30 to 35 liters per minute).
  • the supply tank and connecting mouth for compressed air are hereby connected to a compressed-air pressure of 5 bars (preferably 8 bars), whereby the foam product also enters the mixing channel at approximately the same pressure level.
  • the volume flow of the foam product obtained in this manner amounts to at least some 0.3 liters per minute (preferably 1.5 to 1.75 liters per minute).
  • a foam spray of some 225 liters per minute (preferably 400 liters per minute) at a pressure of at least 4 bars (preferably 5.5 to 6 bars) can be realized at the spray-head with the aforementioned values.
  • a foam layer 31 can be applied to the surface under treatment 29 (which can be, for example, a floor or wall of a workplace, for example, in the food industry), from a distance 27 from the spray-head 7 to the surface of at least 4 meters (preferably 10 to 16 meters).
  • the invention can be applied in both mobile and stationary installations and can be implemented for one or more concurrent operators.
  • FIG. 2 shows a second exemplary embodiment of a foam spraying device 1' in more detail.
  • Compressed air is supplied via a first connecting tap 201, and the necessary water is supplied via a second connecting tap 202.
  • the second connecting tap 202 is coupled to a water-reducer 204 via a connecting point 203 (which can be, for example, a so-called quick-release coupling).
  • the water reducer 204 is coupled with a tap 205 for shutting off the water and the compressed air by means of a valve 218.
  • the other side of the tap 205 is (additionally) coupled via a flow-back protection 206, an excess-pressure valve 207 and a fine-dosage regulator 208 to a collector 209.
  • the first connecting tap 201 is coupled via a tap-in point 215 (for example, via a quick-release coupling) and an air filter 216 to a compressed air pressure-regulator 217.
  • the output of the pressure regulator is coupled to a valve 218 which is operated by the tap 205.
  • the output of the valve 218 is connected via a regulating tap 221 and a non-return valve 222 with the collector 209.
  • the foam supply can be made wetter or drier with the regulating tap 221.
  • the output of the pressure regulator 217 is also coupled to a three-way tap 225 for selecting either filling or emptying of a storage tank 234 for the foam product.
  • An output of the three-way tap 225 is coupled to a valve 223 via a pressure regulator 226 and a non-return valve 227 so that the compressed air pipe can be bled via a quick-bleeding air valve 224.
  • the storage tank 234 is coupled with the collector 209 via a regulating valve 232 and a non-return valve 233.
  • the storage tank 234 can be filled or emptied via a tap-in point 235 and a respective filling or emptying hose 236.
  • the output of the valve 218 is coupled to a quick-bleeder 224 via a non-return valve 220 so that the pressure of the storage tank 234 can be rapidly reduced via a non-return valve 230.
  • the (water) supply 219 rinses a vacuum pump 229 during the delivery of foam.
  • the pressure in the storage tank is limited via an excess-pressure valve 231.
  • the operation of the foam spraying device 1' is as follows. After the storage tank 234 has been filled with foam concentrate (product) and the air supply 201 and the water supply 202 are connected, a collector 209 is filled with the product which is to be foamed. The output of the collector is coupled via a tap-in point 210 and a foam hose 211 via a blocking tap 212 to a foam-mouth, either for a straight jet or for a V-jet 214 (for a further explanation, see the general description accompanying figure 1).
  • Figure 3 depicts a portion of the internals of the storage tank 234, for the external read-out of the amount of foam concentrate in the storage tank.
  • An indicator 301 provides an indication of the amount of liquid in the tank.
  • the indicator is mounted on a plate 303 which is placed in such a manner that it can be rotated on a pipe 312 which pipe is additionally used for the supply of compressed air or for the vacuum generation in the storage tank.
  • a float-body 316 is also attached to this pipe 312, which float-body 316 moves upwards and downwards in unison with the level of the liquid.
  • the float-body is connected to the plate 303 via a spiral-shaped rod 7. During the respective rising and falling of the float-body, the spiral-shaped rod pushes (and thereby rotates) the plate 303.
  • two floats 217 are coupled to the float-body 316.
  • the compressed air is further let in to and out of the storage tank via an input and output 315, respectively.
  • the product (foam concentrate) is let in to and out of the storage tank via an input/output 314.
  • Another embodiment of the system is equipped with a safety device on the respective filling and emptying hose so that in connected state the tank can only be emptied under low pressure (e.g. 0.5 bars) via the respective filling and emptying hose.
  • a safety device on the respective filling and emptying hose so that in connected state the tank can only be emptied under low pressure (e.g. 0.5 bars) via the respective filling and emptying hose.

Landscapes

  • Nozzles (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Detergent Compositions (AREA)
  • Cleaning Or Drying Semiconductors (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)

Claims (8)

  1. Verfahren zum Aufbringen einer Reinigungs- und/oder Desinfektionsschaumschicht auf eine Oberfläche, wobei unter Druck und einem Durchfluss Schaum aus einer im Abstand von der Oberfläche gehaltenen Spritzdüse gespritzt wird, wobei eine gleichmäßige die Oberfläche bedeckende Schaumschicht gebildet wird, wobei das Verfahren dadurch gekennzeichnet wird, dass ein konzentriertes Schaumprodukt (19) mit Luftdruck von einem Behälter (17, 234) aus in eine Mischkammer (3, 209) überführt wird, welcher Mischkammer auch gesondert Luft und Wasser unter Druck zugeführt werden, welches Gemisch aus konzentriertem Schaumprodukt, Luft und Wasser von der Mischkammer aus zu der Spritzdüse geführt wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das konzentrierte Schaumprodukt, Luft und Wasser mit einem derartigen Druck der Mischkammer zugeführt werden, dass das aus der Spritzdüse heraustretende Gemisch als ein konzentrierter Strahl mit einem Druck von wenigstens 4 bar und mit einem Durchfluss von wenigstens 150 Liter in der Minute gespritzt wird.
  3. Einrichtung (1, 1 ) zur Ausführung des Verfahrens nach einem der vorigen Ansprüche, welche Einrichtung umfasst: einen Behälter (17, 234), eine Spritzdüse (7, 123), eine Mischkammer (3, 209), versehen mit einer Anzahl von Zufuhröffnungen, an die Zufuhrleitungen zur unter Druck erfolgenden Zufuhr von Schaumprodukt, Wasser und Druckluft und eine die Spritzdüse mit der Mischkammer verbindende Verbindungsleitung angeschlossen sind, dadurch gekennzeichnet, dass die Mischkammer drei Zufuhröffnungen umfasst, wobei die Zufuhröffnungen gesondert mit einer Wasserzufuhrleitung, einer Druckluftzufuhrleiting und einer Zufuhrleiting vom Behälter (17, 234) aus zur Zufuhr von, in dem Behälter befindlichem, konzentriertem Schaumprodukt zur Mischkammer verbunden sind, und dass die Einrichtung mit Mitteln versehen ist, um das konzentrierte Schaumprodukt unter Druck zu bringen.
  4. Einrichtung (1, 1 ) nach Anspruch 3, dadurch gekennzeichnet, dass die Druckmittel als eine Verbindungsleitung (25) zwischen dem Behälter und der Zufuhrleitung von Druckluft ausgeführt sind.
  5. Einrichtung (1, 1 ) nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass die Spritzdüse eine zylindrische Form hat und dass Mitteln vorhanden sind, um während des Betriebs der Einrichtung einen Druck von wenigstens 5 bar und einen Volumenstrom mit einem Durchfluss von wenigstens 0,3 Liter in der Minute in der Zufuhrleitung des konzentrierten Schaumprodukts und einen Druck von wenigstens 5 bar in der Zufuhrleitung von Druckluft und einen Druck von wenigstens 5 bar und einen Volumenstrom mit einem Durchfluss von wenigstens 15 Liter in der Minute in der Zufuhrleitung von Wasser und einen Druck von wenigstens 4 bar und einen Volumenstrom mit einem Durchfluss von wenigstens 150 Liter in der Minute nahe der Spritzdüse in der Verbindungsleitung für das aus der Mischkammer kommende Gemisch zu erzeugen.
  6. Einrichtung (1, 1 ) nach Anspruch 5, dadurch gekennzeichnet, dass Mitteln vorhanden sind, um während des Betriebs der Einrichtung einen Druck von wenigstens 6 bar und einen Volumenstrom mit einem Durchfluss von wenigstens 1,5 Liter in der Minute in der Zufuhrleitung des konzentrierten Schaumprodukts und einen Druck von wenigstens 8 bar in der Zufuhrleitung von Druckluft und einen Druck von wenigstens 6 bar und einen Volumenstrom mit einem Durchfluss von wenigstens 30 Liter in der Minute in der Zufuhrleitung von Wasser und einen Druck von wenigstens 5,5 bar und einen Volumenstrom mit einem Durchfluss von wenigstens 400 Liter in der Minute nahe der Spritzdüse in der Verbindungsleitung für das aus der Mischkammer kommende Gemisch zu erzeugen.
  7. Einrichtung (1, 1 ) nach den Ansprüchen 5 oder 6, dadurch gekennzeichnet, dass die Einrichtung eine automatische Füllanlage umfasst.
  8. Einrichtung (1, 1 ) nach den Ansprüchen 5, 6 oder 7, dadurch gekennzeichnet, dass die Einrichtung am Behälter eine Füllstandsanzeige aufweist zur Anzeige des Füllstands des konzentrierten Schaumprodukts.
EP95901622A 1993-11-17 1994-10-10 Verfahren und einrichtung zum aufbringen von reinigungs- oder desinfektionsschaum auf eine oberfläche Expired - Lifetime EP0797484B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL9301984A NL9301984A (nl) 1993-11-17 1993-11-17 Werkwijze voor het aanbrengen van een schuimlaag op een oppervlak en schuimspuitapparaat voor het uitvoeren van de werkwijze.
NL9301984 1993-11-17
PCT/NL1994/000243 WO1995013885A1 (en) 1993-11-17 1994-10-10 Method and apparatus for the application of a cleansing or disinfecting foam on a surface

Publications (2)

Publication Number Publication Date
EP0797484A1 EP0797484A1 (de) 1997-10-01
EP0797484B1 true EP0797484B1 (de) 1999-10-20

Family

ID=19863142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95901622A Expired - Lifetime EP0797484B1 (de) 1993-11-17 1994-10-10 Verfahren und einrichtung zum aufbringen von reinigungs- oder desinfektionsschaum auf eine oberfläche

Country Status (8)

Country Link
EP (1) EP0797484B1 (de)
JP (1) JPH09509090A (de)
AT (1) ATE185713T1 (de)
AU (1) AU1078295A (de)
CA (1) CA2176728A1 (de)
DE (1) DE69421297D1 (de)
NL (1) NL9301984A (de)
WO (1) WO1995013885A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2148192A1 (en) * 1995-04-25 1996-10-26 Michael E. S. Lawrence Soap foam generator
DE10065105A1 (de) * 2000-12-28 2002-07-04 Bionik Gmbh Innovative Technik Verfahren zum taktweisen Erzeugen eines Strahles einer Spülflüssigkeit, insbesondere Wasser, sowie Einrichtung zum Durchführen des Verfahrens
JP2003024837A (ja) * 2001-07-11 2003-01-28 Ardent:Kk 泡沫発射ガン
US7516907B2 (en) 2007-05-04 2009-04-14 Ecolab Inc. Mobile foam producing unit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3974965A (en) * 1974-07-17 1976-08-17 Chemidyne Corporation Method and applicator for producing cleaning foam
US4584002A (en) * 1981-06-22 1986-04-22 Halliburton Company Recirculating foam generator
US4743430A (en) * 1985-08-23 1988-05-10 Bio-Tek Industries, Inc. I C engine powered portable foam generator
US4802630A (en) * 1985-11-19 1989-02-07 Ecolab Inc. Aspirating foamer
JPS63112250A (ja) * 1986-10-30 1988-05-17 Takehisa Takahashi 自動車のボデイ−洗浄方法
IT220802Z2 (it) * 1990-07-09 1993-11-08 Corona Monica Dispositivo per la dosatura e la miscelazione di un detergente con acqua mediante aria compressa con comandi disposti su lancia di nebulizzazione che permette anche la trasformazione del getto in schiuma

Also Published As

Publication number Publication date
ATE185713T1 (de) 1999-11-15
JPH09509090A (ja) 1997-09-16
NL9301984A (nl) 1995-06-16
CA2176728A1 (en) 1995-05-26
DE69421297D1 (de) 1999-11-25
EP0797484A1 (de) 1997-10-01
WO1995013885A1 (en) 1995-05-26
AU1078295A (en) 1995-06-06

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