EP1354985A1 - Zusammensetzung zum Reinigen von Kühlanlagen, Verfahren und Einrichtung zu dessen Verwendung - Google Patents

Zusammensetzung zum Reinigen von Kühlanlagen, Verfahren und Einrichtung zu dessen Verwendung Download PDF

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Publication number
EP1354985A1
EP1354985A1 EP03290960A EP03290960A EP1354985A1 EP 1354985 A1 EP1354985 A1 EP 1354985A1 EP 03290960 A EP03290960 A EP 03290960A EP 03290960 A EP03290960 A EP 03290960A EP 1354985 A1 EP1354985 A1 EP 1354985A1
Authority
EP
European Patent Office
Prior art keywords
cleaning
fluid
oil
foam
gas
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
EP03290960A
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English (en)
French (fr)
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EP1354985B1 (de
Inventor
Serge Francois
Françoise Brisset
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.)
Dehon SA
Original Assignee
Dehon SA
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 Dehon SA filed Critical Dehon SA
Publication of EP1354985A1 publication Critical patent/EP1354985A1/de
Application granted granted Critical
Publication of EP1354985B1 publication Critical patent/EP1354985B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/0005—Other compounding ingredients characterised by their effect
    • C11D3/0094—High foaming compositions
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/37—Polymers
    • C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C11D3/3715—Polyesters or polycarbonates
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/50—Solvents
    • C11D7/5004—Organic solvents
    • C11D7/5018—Halogenated solvents
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/14—Hard surfaces
    • C11D2111/20—Industrial or commercial equipment, e.g. reactors, tubes or engines

Definitions

  • the invention relates to the field of refrigeration installations in which a refrigerant circulates in a closed circuit. It aims at especially a way to clean the material.
  • the installations concerned by the present invention include a closed circuit in which circulates a refrigerant entrained by means of a compressor of the lubricated type. Due to the lubrication needs of the compressor, there is introduced, as is known, an oil of lubrication.
  • the proper functioning of the installation is conditioned by a good condition of the internal surfaces of the circuit. It is up to its operator to eliminate impurities likely to be entrained by the refrigerant. AT the origin of the formation of its impurities, we find the incidents of engine operation in airtight or airtight units accessible and the resulting scale formation, the presence of water in the circuit, acid formation, degradation of the lubricating oil or well the formation of oxides in welds and solders when they have been without having first removed the oxygen trapped in the conduits.
  • a cleaning operation is therefore already necessary for start-up a new installation or later after repairing a fault having caused contamination of the circuit.
  • the output of the element is connected to a recovery keg by means of a flexible tube.
  • This keg is itself kept under pressure atmospheric by being connected to the open air by a tube which allows to remove nitrogen and any vapors from the product.
  • the open air is sufficient because the product has under the conditions of use a low vapor pressure, its boiling temperature being greater than 30 ° C.
  • the cleaning operation consists in putting the circulating fluid in opening the cylinder valve.
  • the fluid is then propelled by the gas under pressure.
  • We possibly activate the circulation by creating strokes ram in the fluid, repeatedly opening and closing and quick valve.
  • the fluid supply is stopped when the liquid recovered in the keg flows clear. The installation is then clean.
  • the replacement product must have the same properties as the previous. It must be a solvent for the products used in the installations, not to be flammable under the conditions of use, to be extractable, have a low viscosity, do not leave residual traces or strictly speaking, traces compatible with refrigerants and oils used in the refrigeration circuit. It must be inexpensive.
  • cleaning oils based on polyol-ester (POE) or polyalkylene glycol (PAG) in particular, which have pickling properties and the low viscosity required for this application. They are also compatible with the refrigerant used in the circuit. We use them in particular to ensure the conversion of installations to new ones regulatory refrigerants. Operating in a closed circuit, the quantity is around 1%, at most 3%. However their implementation in cleaning operations, where they are used in larger proportions, is not satisfactory because they are very difficult to extract from the circuit. In addition, there remains an oil residue that is not extractable which can affect the proper functioning or even cause breakage machine.
  • the invention therefore relates to a cleaning fluid for installation which does not have this drawback.
  • the cleaning fluid is characterized by the includes liquid cleaning oil mixed with gas liquefied transport with which it forms by relaxation a foam of cleaning.
  • the transport fluid is based on hydrofluoro-carbon.
  • it is the product R-134a (tetrafluoro 1,1,1,2 ethane) and the cleaning agent is a POE or PAG oil. other products are affected by the invention.
  • R-134a in addition to R-134a, the following fluids can be used: R-125, R-245fa, R-245ca, R-236ea, R-236fa, RC318 alone or a mixture containing these fluids: R-404A, R-404B, ..., R-404E, R-413A, R-417A, R-507.
  • the R-134a fluid is however the most suitable fluid for the present application.
  • the cleaning fluid is made up of 10 to 80% cleaning oil and 90% to 20% gas liquefied. Preferably it consists of 20 to 40% of cleaning oil and 80 to 60% liquefied gas.
  • This cleaning fluid by its implementation in the form of a foam, has the advantage, in addition to its solvent power, of acting mechanically to detach and entrain impurities from the circuit into which it is injected.
  • the amount of cleaning oil is limited. contained in the circuit during the cleaning operation and therefore the amount of residual product that must be extracted after cleaning.
  • liquefied gas can be used alone to rinse the circuit thanks to its miscibility with the cleaning agent.
  • the fluid is packaged in a pressure container, 4 bars minimum, 10 bars maximum, so that it forms a foam when extracted from it.
  • the invention therefore also relates to a method for cleaning a refrigeration system. This is characterized by the fact that it includes the following steps: create a foam from the oil and a transport, circulate the foam in said element, extract the foam.
  • the extraction step is carried out by circulating in the element to be cleaned, a fluid at least partly miscible with the cleaning oil.
  • the extraction fluid is formed from the transport fluid that we have separated from the foam. This process has, among other advantages, that of operate in a closed circuit, with rejection of the atmosphere.
  • the transport fluid is circulated in said element by means of a transfer machine.
  • the transport fluid is extracted in gaseous form from said container and then liquefied before injection in the refrigeration system element.
  • the method comprises an initial step of setting in place communication with a vacuum source. It also includes a final step purge using the transfer machine.
  • the invention also relates to a device for implementing the process using a cleaning fluid. It includes a source of cleaning fluid, means for recovering cleaning fluid, conduits matching said source with an input of the element of the refrigeration system to be cleaned, conduits communication an output of the element to be cleaned with the means of recovery, and valves controlling said links.
  • the device includes a transfer machine, which can be interposed by means of valves between a gas outlet of the means of recovery and entry of the element to perform the rinsing step.
  • the device comprises a vacuum pump which can be connected to the means of valves to the whole cleaning circuit for a setting empty.
  • the device comprises a block composed of said valves with means of connection to at least the cleaning fluid source, recovery means, transfer, a vacuum pump or the element of the refrigeration system to clean.
  • FIG. 1 we see an element of a refrigeration system F to be cleaned.
  • a tubing in serpentine shape with an F1 input and an F2 output.
  • the invention is not not limited to cleaning a single element; we can clean everything or part of an installation
  • the source of cleaning fluid is represented by a BF bottle.
  • She includes a valve BF1 to control the extraction of the FN cleaning which shows the liquid phase and the gas or vapor phase represented by transparency.
  • the tap controls passage through a tube immersed in the liquid phase.
  • the cleaning fluid is made up a mixture of cleaning oil and liquefied gas.
  • the function of the cleaning agent is to dissolve the lubricating oil at extract, entrain water and acids, as well as contamination.
  • the cleaning oil is a synthetic oil, of preferably based on polyol ester (POE) or polyalkylene glycol (PAG). These products are commercially available for POE, for example under the brands Planetelf ACD from Totalfinaelf, Arctic EAL from Exxon Mobil or Emkarate RL from ICI-Emkarate, and for the PAG, for example under the brands Planetelf Pag488, Planetelf Pag244 and Planetelf Pag Sp20 from Totalfinaelf or Emkarox RL from Ici-Emkarate. It can also be an alkyl benzene or a mineral oil. This agent is not volatile. It is low viscosity under the conditions of use, up to 68 centistokes at 40 ° C in practice.
  • the liquefied gas must have a boiling temperature at room pressure lower than 20 ° C and preferably lower than -20 ° C or lower still. However, it becomes more expensive and less interesting. economically.
  • the cleaning oil is mixed with the liquefied gas in which it is miscible.
  • a minimum amount of agent is required in the mixture to get a foam and a minimum amount of gas to get a pressure.
  • the rate is between 10% and 70% of cleaning oil.
  • R-134a fluid is the preferred liquefied gas.
  • the means of recovering cleaning fluid which is also a BR bottle.
  • This includes two taps, BR1 and BR2.
  • the BR1 tap controls the passage through a tube immersed in the liquid phase of the recovered fluid
  • the valve BR2 controls passage through a shorter tube communicating with the gas phase of the recovered fluid.
  • An autonomous transfer machine T comprises a pump which, from preferably is dry piston or diaphragm, TP, as it does not require no lubricating oil.
  • TP a pump which, from preferably is dry piston or diaphragm, TP, as it does not require no lubricating oil.
  • the use of an open compressor, airtight or airtight accessible is possible but we are faced with the risk of pollution, and it requires monitoring the level oil.
  • It also includes a ventilated TE exchanger.
  • the fluid to transfer, initially in the state of vapor is admitted inside by a input T1 which is provided with a filtering means T3. He passes successively through the pump then in the exchanger where it is cooled until liquefaction and is evacuated by exit T2.
  • the device of the invention comprises a block V comprising 6 valves V1 to V6, and internal conduits connecting six connections of conduits: VT1, VBR1, VE2, VBR2, VT2, VE1, VV, VBF.
  • block on means any assembly comprising the various organs. These can be mounted on a support plate for example.
  • the valves are two channels with manual control. Valves V1, V3 and V5 are placed in series, the valves V2, V4 and V6 also.
  • valve V1 is placed in series with the fitting VE2 on one side and with the valve V5 on the other.
  • the valve V5 communicates with the valve V3 which is connected to the VBF connector.
  • valve V2 is in series with the fitting VBR2 on one side and with valve V4 on the other. This communicates with the valve V6 which is connected to the VV fitting.
  • the VBR1 fitting corresponds with the conduit connecting the V1 and V5 valves, the VT2 fitting with the conduit connecting the V5 and V3 valves, the VT1 fitting with the conduit connecting V2 and V4, and the fitting VE1 with the conduit connecting V4 and V6.
  • a conduit connects the conduit placed between the valves V4 and V6, and the conduit placed between valve V3 and the VBF connector.
  • the fittings allow the connection of external pipes, for example flexible, to put them in communication with the various valves of the way explained below.
  • the fittings can be of the quick type.
  • Pipe C1 connects the valve BF1 of the cleaning fluid bottle to the VBF connection; the C2 pipe connects the valve of the recovery bottle BR1 to VBR1; the pipe C3 connects the tap BR2 to VBR2; the pipe C4 connects the connection VE2 to an input F2 of the element to be cleaned; the C5 pipe connects VE1 to another input F1 of the element; pipe C7 connects VT2 to the outlet T2 of the transfer machine; pipe C6 connects VT1 to input T1 of the transfer machine. Finally, the pipe C8 connects VV to a vacuum pump PV.
  • the operation is initialized by first vacuuming the entire circuit.
  • the taps on the bottles are closed.
  • the vacuum does not need to be pushed; when the pump pressure gauge indicates -1bar, the valve V6 is closed, and the pump is stopped.
  • Valves V2, V3, V4, V5 and V6 are closed. Valve V1 remains opened. The tap BF1 is opened. This has the effect of allowing gas liquefied to relax. Passing through the FNL liquid phase, it forms a foam. The foam formed from the oil-gas mixture is therefore propelled in the circuit which is in depression. A few moments later, the time that the conduits are filled, we open the tap BR1 of the recovery bottle. The foam expelled from the BF bottle travels conduits C1 and C5 before entering the installation element refrigeration.
  • the combined effect of POE oil, stripper and detergent, and foam, abrasive allows the detachment of particles or waste adhering to walls.
  • the circulation and the state of the fluid can be monitored by observing the LEDs located at the two connections VBF and VBR1. When the fluid has a sufficiently clear appearance, the phase of cleaning by closing tap BF1.
  • Valves V4, V5 and V6 are closed.
  • V1, V2 and V3 as well as the BR2 tap.
  • the liquefied gas travels through conduit C7 and passes through element F. Due to its miscible nature with cleaning oil, and the fact that it is the entry of the element with an oil level close to zero, it absorbs all trace of oil it meets in the circuit, until saturation. He is then brought back to the BR recovery bottle where the liquid phase is deposited background. Continue rinsing until no more foam is noticed. through the LED on the VBR1 connector.
  • FIG. 4 shows the circulation of fluids.
  • the valve BR2 of the bottle is closed recovery valve BF1 of the cleaning fluid bottle as well than valves V1, V3 and V6.
  • the valves V2, V4 and V5 are opened.
  • the transfer machine in action.
  • the created depression aims to empty all the conduits and the element of the refrigeration installation.
  • the mixture is discharged by the compressor of the transfer machine into the recovery bottle.
  • the assembly is then ready for a new start-up.
  • the storage mixture is a single-phase liquid at all temperatures between 0 ° C and 50 ° C and all the proportions tested. We form the foam by relaxation The foaming effect of the mixture is strong when it contains between 10 and 80% oil. It rapidly decreases outside these proportions.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Cleaning In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Detergent Compositions (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP03290960A 2002-04-17 2003-04-17 Zusammensetzung zum Reinigen von Kühlanlagen, Verfahren und Einrichtung zu dessen Verwendung Expired - Lifetime EP1354985B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0204785A FR2838658B1 (fr) 2002-04-17 2002-04-17 Produit pour le nettoyage d'installations frigorifiques, procede et dispositif pour sa mise en oeuvre
FR0204785 2002-04-17

Publications (2)

Publication Number Publication Date
EP1354985A1 true EP1354985A1 (de) 2003-10-22
EP1354985B1 EP1354985B1 (de) 2010-02-24

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EP03290960A Expired - Lifetime EP1354985B1 (de) 2002-04-17 2003-04-17 Zusammensetzung zum Reinigen von Kühlanlagen, Verfahren und Einrichtung zu dessen Verwendung

Country Status (6)

Country Link
US (1) US6877337B2 (de)
EP (1) EP1354985B1 (de)
AT (1) ATE458840T1 (de)
CA (1) CA2425431A1 (de)
DE (1) DE60331381D1 (de)
FR (1) FR2838658B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7307054B2 (en) 2004-01-20 2007-12-11 E.I. Du Pont De Nemours And Company Vapor compression air conditioning or refrigeration system cleaning compositions and methods

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ297706B6 (cs) * 2004-06-02 2007-03-07 Ekotez, Spol. S.R.O. Zpusob promývání chladicích nebo klimatizacních okruhu a zarízení pro provádení tohoto zpusobu
FR2874383B1 (fr) * 2004-08-18 2006-10-13 Arkema Sa Composition a base de 1,1,1,3,3 - pentafluorobutane, utilisable dans des applications de depot, nettoyage, degraissage et sechage
US20060179852A1 (en) * 2005-02-16 2006-08-17 Honeywell International Inc. Compositions and methods for cleaning vapor compression systems
US20090049856A1 (en) * 2007-08-20 2009-02-26 Honeywell International Inc. Working fluid of a blend of 1,1,1,3,3-pentafluoropane, 1,1,1,2,3,3-hexafluoropropane, and 1,1,1,2-tetrafluoroethane and method and apparatus for using
US20170326942A1 (en) * 2014-11-17 2017-11-16 Yehoshua OHAYON System and method for flushing and cleaning air conditioning system
CN106839487B (zh) * 2017-03-16 2019-02-22 华北电力大学（保定） 一种带反冲洗功能的跨临界二氧化碳空气源热泵系统
CN113414197A (zh) * 2021-06-10 2021-09-21 克拉玛依市先能科创重油开发有限公司 脱除乙烯裂解焦油的处理方法

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EP0753557A1 (de) * 1995-07-13 1997-01-15 The Procter & Gamble Company Verpackte schäumende Zusammensetzung
EP0753559A1 (de) * 1995-07-13 1997-01-15 The Procter & Gamble Company Verfahren zur Reinigung von Textilprodukten
EP0937771A1 (de) * 1998-02-19 1999-08-25 The Procter & Gamble Company Flüssige Waschmittel- und Schaumzusammensetzungen
DE10012492A1 (de) * 2000-03-15 2001-09-27 Henkel Kgaa Reinigungsmittel

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Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
EP0753557A1 (de) * 1995-07-13 1997-01-15 The Procter & Gamble Company Verpackte schäumende Zusammensetzung
EP0753559A1 (de) * 1995-07-13 1997-01-15 The Procter & Gamble Company Verfahren zur Reinigung von Textilprodukten
EP0937771A1 (de) * 1998-02-19 1999-08-25 The Procter & Gamble Company Flüssige Waschmittel- und Schaumzusammensetzungen
DE10012492A1 (de) * 2000-03-15 2001-09-27 Henkel Kgaa Reinigungsmittel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7307054B2 (en) 2004-01-20 2007-12-11 E.I. Du Pont De Nemours And Company Vapor compression air conditioning or refrigeration system cleaning compositions and methods

Also Published As

Publication number Publication date
EP1354985B1 (de) 2010-02-24
FR2838658A1 (fr) 2003-10-24
ATE458840T1 (de) 2010-03-15
US20040103682A1 (en) 2004-06-03
FR2838658B1 (fr) 2005-01-28
CA2425431A1 (fr) 2003-10-17
DE60331381D1 (de) 2010-04-08
US6877337B2 (en) 2005-04-12

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