EP0062010B1 - An apparatus for mixing and delivering liquids in the form of a compact foam - Google Patents

An apparatus for mixing and delivering liquids in the form of a compact foam Download PDF

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Publication number
EP0062010B1
EP0062010B1 EP82830053A EP82830053A EP0062010B1 EP 0062010 B1 EP0062010 B1 EP 0062010B1 EP 82830053 A EP82830053 A EP 82830053A EP 82830053 A EP82830053 A EP 82830053A EP 0062010 B1 EP0062010 B1 EP 0062010B1
Authority
EP
European Patent Office
Prior art keywords
mixing
liquid
conduit
tank
foam
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
Application number
EP82830053A
Other languages
German (de)
French (fr)
Other versions
EP0062010A1 (en
Inventor
Rubens Basaglia
Ezio Bollina
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.)
B & B Engineering Srl
Original Assignee
B & B Engineering Srl
B & B Engineering Srl
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 B & B Engineering Srl, B & B Engineering Srl filed Critical B & B Engineering Srl
Priority to AT82830053T priority Critical patent/ATE17439T1/en
Publication of EP0062010A1 publication Critical patent/EP0062010A1/en
Application granted granted Critical
Publication of EP0062010B1 publication Critical patent/EP0062010B1/en
Expired 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
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/408—Means for supplying cleaning or surface treating agents
    • A47L11/4088—Supply pumps; Spraying devices; Supply conduits
    • 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
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/32—Carpet-sweepers
    • A47L11/325—Shampoo devices for carpet-sweepers
    • 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
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/408—Means for supplying cleaning or surface treating agents
    • A47L11/4083—Liquid supply reservoirs; Preparation of the agents, e.g. mixing devices
    • 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 an apparatus for mixing and delivering liquids in the form of a compact foam, the application field for which is to be found in large areas where, with a certain frequency, it is necessary to thoroughly clean vast surfaces that have been sullied with residues of animal nature (fats in particular) such as, for example, slaughter houses and factories where salami, cheeses and foodstuffs in general, and the like, are produced.
  • the cleaning operation consists in contemporaneously washing down the flooring and the walls, both of which are generally faced with tiles, marble or steel etcetera.
  • the washing operation can only be effected with equipments of an industrial nature, amongst which abound conventional hoses supplied with water at a high pressure and temperature, which operate prevalently through a mechanical action of the water with results that are reasonably good (cleaning in the order of 80-85%) though with very high loss and water heating costs.
  • Equipments have, therefore, been designed to deliver foam from a solvent-liquid detergent mixture which, in quite a compact form, can easily be applied to the walls and be left there for a given period of time sufficient to exercise an extremely efficient cleansing action, after which it can be removed through a normal rinsing operation.
  • Such equipments are constituted by only a vessel that is filled with a predetermined quantity of water A, to which the operator adds each time, the right percentage of liquid detergent B with which to obtain the desired mixture.
  • the operator then mixes A and B, seals the container hermetically and connects it to a source of compressed air.
  • the water-detergent mixture passes from the said container into a mixing device to which, moreover, the aforementioned source of pressurized air is connected, and thus the incoming liquid mixture is "transformed" into foam, this being due to the high percentage of air and to the surface tension characteristics of the liquid B.
  • the object of the invention consists, therefore, in overcoming the above mentioned difficulties by making available an apparatus that allows a first liquid solvent and at least a second liquid detergent, or solute, to be mixed continuously in predetermined quantities, and the said mixture to be subsequently delivered in the form of a compact foam, without it being necessary to have to continually intervene manually in the said mixing operation, without high volume pressure vessels being used, and without interruptions in the delivery of the foam; all this with an extremely simple apparatus, the cost of which is low in comparison to the results obtainable therewith.
  • a further object of the invention consists in constructing the said apparatus in such a way that without having to alter the capacity of the vessels - and of the liquid solvent vessel in particular - it can be utilized both for fixed applications and for mobile employment.
  • a non-pressurized first tank for a liquid solvent A; mixing liquid pump means; a first conduit connecting said first tank to the inlet of said pump means; at least one non-pressurized second tank for liquid cleansing solvent, B; a second conduit connecting said at least one second tank via regulator-doser means to said first conduit; a third conduit connecting the outlet of said pump means directly to a mixing-injecting device; a source of compressed air and a fourth conduit connecting directly said source to the mixing-injecting device; the mixing-injecting device receiving, in use, the pre-mixed solvents and compressed air and delivering the compact foam.
  • the apparatus which in its mobile form of embodiment is mounted on a non-illustrated carriage in order to allow it to be moved into the place of use, comprises a first tank 1 that contains the solvent (or water) A that is connected directly, via a flexible pipe 2, to a continuous source of supply and, downstream is connected to a first conduit 3, fitted with a non-return valve 4, connected to pumping means P (in the case under consideration, a centrifugal pump), the delivery of which goes, via a second conduit 5, to a mixing-injecting device 6 of a known type, utilized for forming the foam together with a source of compressed air coming from a compressor C via a third pipe 7.
  • a first tank 1 that contains the solvent (or water) A that is connected directly, via a flexible pipe 2, to a continuous source of supply and, downstream is connected to a first conduit 3, fitted with a non-return valve 4, connected to pumping means P (in the case under consideration, a centrifugal pump), the delivery of which goes, via a second conduit 5, to a
  • a second tank that contains a liquid detergent (or solute) B, which is sent, via a fourth conduit 9, into the solvent A upstream of the pump P.
  • the said fourth conduit 9 is provided with means for dosing the liquid B and for cutting off the flow thereof, shown globally at 10, in the case under consideration constituted by a doser pump of, for example, the diaphragm type.
  • the operation of the apparatus is extremely simple since all that has to be done is to actuate, at the same time, the pump P and the means 10 in order to cause the liquid A to be drawn from the tank 1 and the liquid B from the tank 8 in the required quantity determined by the said regulating means 10 (obviously in proportion to the quantity drawn of the solvent A in which a way as to define the exact percentage of the mixture to be "transformed” into foam).
  • the various components in view of the toxicity of the solute, shall be constructed out of suitable material (stainless steel), while in place of the doser pump 10 the use may be envisaged of an on-off valve 10' and of a doser valve 10".
  • the tank 1 shall be provided with a float device so as to maintain constant the level of liquid in the inside thereof.
  • the apparatus can be utilized as a mobile plant, as illustrated, or as a fixed installation, in which case it is envisaged that a number of mixing devices 6 be installed in the various areas to be cleaned.
  • the invention may also adopt forms that differ from the one illustrated and, in particular, numerous modifications of a practical nature may be made without there being any deviation from the framework of protection afforded to the invention as defined in the appended claims.

Landscapes

  • Nozzles (AREA)
  • Accessories For Mixers (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Air-Conditioning For Vehicles (AREA)

Description

  • The invention relates to an apparatus for mixing and delivering liquids in the form of a compact foam, the application field for which is to be found in large areas where, with a certain frequency, it is necessary to thoroughly clean vast surfaces that have been sullied with residues of animal nature (fats in particular) such as, for example, slaughter houses and factories where salami, cheeses and foodstuffs in general, and the like, are produced.
  • In such places, the cleaning operation consists in contemporaneously washing down the flooring and the walls, both of which are generally faced with tiles, marble or steel etcetera.
  • Because of the extent of the said surfaces, the washing operation can only be effected with equipments of an industrial nature, amongst which abound conventional hoses supplied with water at a high pressure and temperature, which operate prevalently through a mechanical action of the water with results that are reasonably good (cleaning in the order of 80-85%) though with very high loss and water heating costs.
  • Other equipments utilize, as shown in US-A-4 046 321, a mixture of water and chemical cleaning fluids in a spray delivered under intensive concentrated pressure. In such a solution there is utilized a chemical pressurized tank and compressed air is utilized to force said chemical against the cleaning surface through a liquid spray head.
  • The same solution is also utilized in US-A-4 089 470.
  • Equipments have, therefore, been designed to deliver foam from a solvent-liquid detergent mixture which, in quite a compact form, can easily be applied to the walls and be left there for a given period of time sufficient to exercise an extremely efficient cleansing action, after which it can be removed through a normal rinsing operation.
  • Such equipments, as shown in the US-A-3 337 195, are constituted by only a vessel that is filled with a predetermined quantity of water A, to which the operator adds each time, the right percentage of liquid detergent B with which to obtain the desired mixture. The operator then mixes A and B, seals the container hermetically and connects it to a source of compressed air. The water-detergent mixture passes from the said container into a mixing device to which, moreover, the aforementioned source of pressurized air is connected, and thus the incoming liquid mixture is "transformed" into foam, this being due to the high percentage of air and to the surface tension characteristics of the liquid B.
  • With the said equipments there is, however, a large scale problem because of the limited volume of the pressure vessel both for fixed installations and, above all, as can be seen in practice, for a mobile plant. In the latter case the vessel is emptied in an extremely short span of time (in the order of a few minutes), with the result that the operator has to constantly repeat the aforementioned operations of "discharging" the pressure from the container, filling it with the liquid A, adding the liquid B, mixing one with the other and sealing the container, besides running the risk of coming into contact with the liquid detergent that is highly toxic.
  • The object of the invention consists, therefore, in overcoming the above mentioned difficulties by making available an apparatus that allows a first liquid solvent and at least a second liquid detergent, or solute, to be mixed continuously in predetermined quantities, and the said mixture to be subsequently delivered in the form of a compact foam, without it being necessary to have to continually intervene manually in the said mixing operation, without high volume pressure vessels being used, and without interruptions in the delivery of the foam; all this with an extremely simple apparatus, the cost of which is low in comparison to the results obtainable therewith.
  • A further object of the invention consists in constructing the said apparatus in such a way that without having to alter the capacity of the vessels - and of the liquid solvent vessel in particular - it can be utilized both for fixed applications and for mobile employment.
  • These and other objects too are all attained with the apparatus according to the invention, characteristics of which are that it comprises in combination: a non-pressurized first tank for a liquid solvent, A; mixing liquid pump means; a first conduit connecting said first tank to the inlet of said pump means; at least one non-pressurized second tank for liquid cleansing solvent, B; a second conduit connecting said at least one second tank via regulator-doser means to said first conduit; a third conduit connecting the outlet of said pump means directly to a mixing-injecting device; a source of compressed air and a fourth conduit connecting directly said source to the mixing-injecting device; the mixing-injecting device receiving, in use, the pre-mixed solvents and compressed air and delivering the compact foam.
  • Further characteristics and advantages of the invention will become more obvious from the detailed description that follows, illustrated purely as non-limitative example, on the accompanying drawing, in which:
    • Figure 1 is a diagrammatic representation of the apparatus forming the subject of the invention.
  • With reference to the above mentioned figure, the apparatus, which in its mobile form of embodiment is mounted on a non-illustrated carriage in order to allow it to be moved into the place of use, comprises a first tank 1 that contains the solvent (or water) A that is connected directly, via a flexible pipe 2, to a continuous source of supply and, downstream is connected to a first conduit 3, fitted with a non-return valve 4, connected to pumping means P (in the case under consideration, a centrifugal pump), the delivery of which goes, via a second conduit 5, to a mixing-injecting device 6 of a known type, utilized for forming the foam together with a source of compressed air coming from a compressor C via a third pipe 7.
  • At 8 there is a second tank that contains a liquid detergent (or solute) B, which is sent, via a fourth conduit 9, into the solvent A upstream of the pump P. The said fourth conduit 9 is provided with means for dosing the liquid B and for cutting off the flow thereof, shown globally at 10, in the case under consideration constituted by a doser pump of, for example, the diaphragm type.
  • The operation of the apparatus is extremely simple since all that has to be done is to actuate, at the same time, the pump P and the means 10 in order to cause the liquid A to be drawn from the tank 1 and the liquid B from the tank 8 in the required quantity determined by the said regulating means 10 (obviously in proportion to the quantity drawn of the solvent A in which a way as to define the exact percentage of the mixture to be "transformed" into foam).
  • The two liquids A and B, partially mixed at the inlet to the pump P undergo, through the action of the impeller of the latter, complete and thorough mixing in such a way that when entering the mixing-injecting device 6, the solution is in an ideal condition to give rise, together with the compressed air coming from the conduit 7, to a compact foam that is deposited on to the walls to be cleaned and stays there all the time needed for a cleansing action.
  • With the apparatus in question it is, therefore, possible to have a constant delivery of foam because of the liquid A being supplied continuously through the pipe 2 and, likewise, because of the continuous supply and mixing of the liquid B which can be varied, all the time, percentage wise within required values such as to give rise to the formation of foam having more or less variable physical and attacking characteristics, without the need to resort to pressure tanks and the intermittent operation consequential thereto, and without manual assistance, especially as regards the liquid B.
  • Obviously the various components, in view of the toxicity of the solute, shall be constructed out of suitable material (stainless steel), while in place of the doser pump 10 the use may be envisaged of an on-off valve 10' and of a doser valve 10". In general, the tank 1 shall be provided with a float device so as to maintain constant the level of liquid in the inside thereof.
  • The apparatus can be utilized as a mobile plant, as illustrated, or as a fixed installation, in which case it is envisaged that a number of mixing devices 6 be installed in the various areas to be cleaned.
  • In its practical form of embodiment, the invention may also adopt forms that differ from the one illustrated and, in particular, numerous modifications of a practical nature may be made without there being any deviation from the framework of protection afforded to the invention as defined in the appended claims.

Claims (3)

1. An apparatus for mixing and delivering liquids in the form of a compact foam comprising in combination:
a non-pressurized first tank (1) for a liquid solvent (A); mixing liquid pump means (P);
a first conduit (3) connecting said first tank (1) to the inlet of said pump means (P);
at least one non-pressurized second tank (8) for a liquid cleansing solvent (B);
a second conduit (9) connecting said at least one second tank (8) via regulator-doser means (10) to said first conduit (3);
a third conduit (5) connecting the outlet of said pump means (P) directly to a mixing-injecting device (6);
a source of compressed air (C) and a fourth conduit (7) connecting directly said source (C) to the mixing-injecting device (6); the mixing-injecting device (6) receiving, in use, the pre-mixed solvents and compressed air and delivering the compact foam.
2. An apparatus according to Claim 1, wherein the said first tank 1 is connected, upstream, to a source of supply of the said first liquid, and downstream, to the said first conduit 3.
3. An apparatus according to Claim 1, wherein the said regulator-doser 10 is constituted by a doser pump.
EP82830053A 1981-03-31 1982-03-10 An apparatus for mixing and delivering liquids in the form of a compact foam Expired EP0062010B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82830053T ATE17439T1 (en) 1981-03-31 1982-03-10 DEVICE FOR MIXING AND DELIVERY OF LIQUIDS IN THE FORM OF COMPACT FOAM.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT03384/81A IT1145062B (en) 1981-03-31 1981-03-31 EQUIPMENT FOR THE MIXING AND DISPENSING OF LIQUIDS IN THE FORM OF COMPACT FOAM
IT338481 1981-03-31

Publications (2)

Publication Number Publication Date
EP0062010A1 EP0062010A1 (en) 1982-10-06
EP0062010B1 true EP0062010B1 (en) 1986-01-15

Family

ID=11106105

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82830053A Expired EP0062010B1 (en) 1981-03-31 1982-03-10 An apparatus for mixing and delivering liquids in the form of a compact foam

Country Status (21)

Country Link
EP (1) EP0062010B1 (en)
JP (1) JPS58230A (en)
AR (1) AR226258A1 (en)
AT (1) ATE17439T1 (en)
AU (1) AU549147B2 (en)
BR (1) BR8201707A (en)
CA (1) CA1182432A (en)
CS (1) CS247154B2 (en)
DD (1) DD160556A5 (en)
DE (1) DE3268476D1 (en)
DK (1) DK144182A (en)
ES (1) ES263352Y (en)
GR (1) GR68862B (en)
HU (1) HU183838B (en)
IN (1) IN159894B (en)
IT (1) IT1145062B (en)
NO (1) NO155037C (en)
NZ (1) NZ199799A (en)
RO (1) RO86520B (en)
YU (1) YU58782A (en)
ZA (1) ZA82822B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3630555A1 (en) * 1986-09-08 1988-03-10 Wap Reinigungssysteme High-pressure cleaning device with foam generation
WO1988007895A1 (en) * 1987-04-06 1988-10-20 Foamtech Pty. Ltd. A cleaning system
DE8711675U1 (en) * 1987-08-28 1988-08-04 Kleindienst GmbH, 8900 Augsburg Spray device
IT220802Z2 (en) * 1990-07-09 1993-11-08 Corona Monica DEVICE FOR DOSING AND MIXING OF A DETERGENT WITH WATER BY COMPRESSED AIR WITH CONTROLS AVAILABLE ON A SPRAY LANCE THAT ALSO ALLOWS THE TRANSFORMATION OF THE FOAM JET
CA2148192A1 (en) * 1995-04-25 1996-10-26 Michael E. S. Lawrence Soap foam generator
WO1997032513A1 (en) * 1996-03-05 1997-09-12 Henkel-Ecolab Gmbh & Co. Ohg System for making a floor cleaning liquid available in a convenient manner
DE29920423U1 (en) * 1999-11-19 2001-03-29 DiverseyLever GmbH, 68219 Mannheim Device for cleaning an automatic cream machine
DE10033339A1 (en) * 2000-07-08 2002-01-24 Henkel Ecolab Gmbh & Co Ohg Process and plant for cleaning and / or disinfecting hard surfaces with a foam
US7516907B2 (en) 2007-05-04 2009-04-14 Ecolab Inc. Mobile foam producing unit
JP6222991B2 (en) * 2013-05-27 2017-11-01 遠州工機株式会社 Foam generator

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2960710A (en) * 1955-05-16 1960-11-22 Richard G Mckeegan Portable cleaner for upholstery, walls and the like
US3337195A (en) * 1966-03-15 1967-08-22 Grace W R & Co Foam generating apparatus
US3496592A (en) * 1969-04-24 1970-02-24 Judson O Jones Portable apparatus for cleaning and partially drying carpets
US4046321A (en) * 1975-04-03 1977-09-06 Kem-O-Kleen, Inc. High pressure spray cleaning head
US4089470A (en) * 1976-11-09 1978-05-16 Strahman Valves, Inc. Plural fluids delivery system

Also Published As

Publication number Publication date
DE3268476D1 (en) 1986-02-27
ES263352U (en) 1982-11-01
CS247154B2 (en) 1986-12-18
NZ199799A (en) 1985-08-16
IN159894B (en) 1987-06-13
DK144182A (en) 1982-10-01
NO155037B (en) 1986-10-27
IT1145062B (en) 1986-11-05
AU549147B2 (en) 1986-01-16
AR226258A1 (en) 1982-06-15
JPS58230A (en) 1983-01-05
ZA82822B (en) 1982-12-29
AU8115482A (en) 1982-10-07
DD160556A5 (en) 1983-09-14
RO86520B (en) 1985-03-30
ATE17439T1 (en) 1986-02-15
YU58782A (en) 1986-12-31
BR8201707A (en) 1983-02-22
ES263352Y (en) 1983-04-16
GR68862B (en) 1982-03-02
EP0062010A1 (en) 1982-10-06
NO820717L (en) 1982-10-01
RO86520A (en) 1985-03-15
CA1182432A (en) 1985-02-12
IT8103384A0 (en) 1981-03-31
NO155037C (en) 1987-02-04
HU183838B (en) 1984-06-28

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