EP1354985A1 - Produit pour le nettoyage d'installations frigorifiques, procédé et dispositif pour sa mise en oeuvre - Google Patents
Produit pour le nettoyage d'installations frigorifiques, procédé et dispositif pour sa mise en oeuvre Download PDFInfo
- 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
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 78
- 238000009434 installation Methods 0.000 title claims description 25
- 238000000034 method Methods 0.000 title claims description 16
- 239000000203 mixture Substances 0.000 title abstract description 15
- 238000001816 cooling Methods 0.000 title 1
- 239000012530 fluid Substances 0.000 claims abstract description 60
- 239000006260 foam Substances 0.000 claims abstract description 28
- 238000011084 recovery Methods 0.000 claims abstract description 19
- 238000005057 refrigeration Methods 0.000 claims abstract description 18
- 238000012546 transfer Methods 0.000 claims description 16
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 238000010926 purge Methods 0.000 claims description 4
- 238000009835 boiling Methods 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- FYIRUPZTYPILDH-UHFFFAOYSA-N 1,1,1,2,3,3-hexafluoropropane Chemical compound FC(F)C(F)C(F)(F)F FYIRUPZTYPILDH-UHFFFAOYSA-N 0.000 claims description 2
- NSGXIBWMJZWTPY-UHFFFAOYSA-N 1,1,1,3,3,3-hexafluoropropane Chemical compound FC(F)(F)CC(F)(F)F NSGXIBWMJZWTPY-UHFFFAOYSA-N 0.000 claims description 2
- AWTOFSDLNREIFS-UHFFFAOYSA-N 1,1,2,2,3-pentafluoropropane Chemical compound FCC(F)(F)C(F)F AWTOFSDLNREIFS-UHFFFAOYSA-N 0.000 claims description 2
- 150000004996 alkyl benzenes Chemical class 0.000 claims description 2
- GTLACDSXYULKMZ-UHFFFAOYSA-N pentafluoroethane Chemical compound FC(F)C(F)(F)F GTLACDSXYULKMZ-UHFFFAOYSA-N 0.000 claims description 2
- MSSNHSVIGIHOJA-UHFFFAOYSA-N pentafluoropropane Chemical compound FC(F)CC(F)(F)F MSSNHSVIGIHOJA-UHFFFAOYSA-N 0.000 claims description 2
- 230000004913 activation Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 24
- 239000012159 carrier gas Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 38
- 239000012071 phase Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 229920001515 polyalkylene glycol Polymers 0.000 description 6
- 239000003507 refrigerant Substances 0.000 description 6
- 239000007791 liquid phase Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000012459 cleaning agent Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- FRCHKSNAZZFGCA-UHFFFAOYSA-N 1,1-dichloro-1-fluoroethane Chemical compound CC(F)(Cl)Cl FRCHKSNAZZFGCA-UHFFFAOYSA-N 0.000 description 1
- 241000195940 Bryophyta Species 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 235000011929 mousse Nutrition 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- -1 polyol ester Chemical class 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
-
- C11D2111/20—
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.
Abstract
Description
- la figure 1 représente schématiquement un dispositif de nettoyage d'une installation frigorifique, et
- les figures 2 à 4 représentent les différentes phases de nettoyage avec la circulation des fluides.
Composition | % poids | |||||||
Huile | 5 | 10 | 30 | 40 | 60 | 70 | 80 | 90 |
R134a | 95 | 90 | 70 | 60 | 40 | 30 | 20 | 10 |
Température | Pression relative exprimée en bar | |||||||
0°C | 0,4 | 0,7 | 1,4 | 1,5 | 1,6 | 1,7 | 1,75 | 1,8 |
20°C | 1 | 1,8 | 3,3 | 3,7 | 4,1 | 4,3 | 4,4 | 4,5 |
30°C | 1,9 | 2,7 | 4,7 | 5,7 | 5,9 | 6,2 | 6,4 | 6,5 |
50°C | 2,5 | 4,2 | 8,4 | 9,5 | 11,1 | 11,6 | 11,9 | 12,1 |
- Nettoyage d'un climatiseur de fenêtre neuf.
Le volume du circuit frigorifique est de 4 litres. Le fluide est entraíné par un compresseur hermétique.
On a rempli le circuit de produit en le faisant circuler dans le sens normal de marche de la machine. Le produit a été récupéré à la sortie de la tuyauterie d'aspiration et accumulé dans la bouteille de récupération par l'intermédiaire d'un flexible PVC transparent. On a pu visualiser ainsi l'état du fluide en sortie de circuit. On a utilisé 5 kg de produit.
Après nettoyage, il restait environ 0,6 kg de produit à récupérer dans l'installation, soit 0,2 kg d'huile. On a appliqué la procédure de rinçage de l'invention en utilisant une machine de transfert (marque RD2000) pendant environ 16 minutes. Cela correspondait au passage de 0,7 kg de R 134a, quantité suffisante pour absorber l'huile.
On a ensuite purgé l'installation, en fermant la vanne de la bouteille de récupération. On a arrêté l'opération lorsque le manomètre indiquait 0,2 bars relatifs.
A la pesée de l'appareil, on n'a constaté aucune différence sensible par rapport à la situation avant le traitement. Cela signifie que l'huile a été récupérée. - Nettoyage d'un évaporateur de 14 tubes sur 4 rangs.
Le volume du circuit était de 4 litres.
On a rempli le circuit de produit en le faisant circuler dans le sens normal de marche de la machine. On a récupéré le produit à la sortie de la tuyauterie de récupération par l'intermédiaire d'un flexible transparent PVC. On a pu constater que le circuit était fortement encrassé.
Afin de faciliter l'écoulement du produit dans le circuit et obtenir une pression suffisante pour le produit de nettoyage, on a chauffé la bouteille au moyen d'un radiateur.
On a utilisé 3,8 kg de produit avant d'obtenir une mousse propre en sortie.
Après nettoyage, il en restait environ 0,3 kg dans l'évaporateur. Cela correspond à 0,1 kg d'huile.
On a procédé au rinçage selon l'invention pendant 8 minutes environ. Cette durée correspond au passage de 0,35 kg de R134a, quantité suffisante pour absorber l'huile. On a purgé l'installation comme précédemment. Par pesée, on a vérifié que l'huile était récupérée. - Nettoyage d'une chambre froide négative.
L'installation comprenait un évaporateur avec une batterie à ailettes, de marque Morgana et un compresseur Copeland de capacité 18,13 m3/h. Le volume du circuit était de 28 litres et celui de la chambre était de 5 m3.
Le circuit comprenait 3,5 kg de FX10 qui est un fluide de transition.
On a séparé le compresseur, la bouteille anti-coup de liquide et le déshuileur pour les nettoyer à part. On a démonté le détendeur thermostatique pour le remplacer par un tube brasé afin d'assurer un bon débit d'alimentation. On a remplacé également le déshydrateur par un tube.
Claims (19)
- Fluide de nettoyage pour installation frigorifique, caractérisé par le fait qu'il comprend une huile de nettoyage en mélange avec un gaz liquéfié de transport avec lequel elle forme par détente une mousse de nettoyage.
- Fluide selon la revendication précédente dans lequel le gaz liquéfié a une température d'ébullition à pression atmosphérique inférieure à 20°C, de préférence inférieure à - 20°C.
- Fluide selon la revendication 1 ou 2, dont le gaz liquéfié est à base d'hydro-fluoro-carbone.
- Fluide selon la revendication 1, 2 ou 3, dans lequel l'huile est miscible à au moins 10 % dans le gaz liquéfié, notamment entre 15 et 40 %.
- Fluide de nettoyage selon l'une des revendications 1 à 4, dans lequel le fluide gazeux de transport est choisi parmi les produits R-134a, R-125, R-245fa, R-245ca, R-236ea et R-236fa, considérés seuls ou en mélange.
- Fluide de nettoyage selon l'une des revendications 1 à 5, dans lequel l'huile de nettoyage est une huile de synthèse, notamment de type POE, PAG ou alkyle benzène.
- Fluide de nettoyage selon l'une des revendications précédentes, constitué de 20 à 40 % de l'huile de nettoyage et de 80 à 60 % de gaz liquéfié.
- Fluide de nettoyage selon l'une des revendications précédentes, conditionné dans un récipient résistant à la pression, de telle sorte qu'il forme une mousse quand il est extrait du récipient pour être mis en circulation dans l'élément à nettoyer.
- Procédé de nettoyage d'un élément d'une installation frigorifique, au moyen d'une huile de nettoyage, caractérisé par le fait qu'il comprend les étapes suivantes : créer une mousse à partir de l'huile et d'un gaz liquéfié dans lequel elle est miscible au moins en partie, faire circuler la mousse dans ledit élément, extraire la mousse.
- Procédé selon la revendication précédente, selon lequel l'étape d'extraction est réalisée par mise en circulation dans l'élément, d'un fluide d'extraction miscible, en partie au moins, avec l'huile de nettoyage.
- Procédé selon la revendication précédente selon lequel le fluide d'extraction est formé, en partie au moins, dudit gaz liquéfié.
- Procédé selon la revendication précédente, selon lequel après extraction de la mousse de l'élément, on récupère celle-ci dans un récipient de récupération, on en extrait la phase gazeuse que l'on met en circulation dans ledit élément
- Procédé selon la revendication précédente, selon lequel on extrait ladite phase gazeuse au moyen d'une machine de transfert par laquelle le gaz est liquéfié avant d'être mis en circulation dans ledit élément.
- Procédé selon l'une des revendications 9 à 13, comprenant une étape initiale de mise en communication avec une source de vide.
- Procédé selon l'une des revendications 13 et 14, comprenant une étape finale de purge au moyen de la machine de transfert.
- Dispositif pour la mise en oeuvre du procédé selon l'une des revendications, au moyen d'un fluide de nettoyage selon l'une des revendications 1 à 8, comprenant une source de fluide de nettoyage, un moyen de récupération du fluide de nettoyage, des conduits mettant en communication ladite source avec une entrée de l'élément à nettoyer, des conduits mettant en communication une sortie de l'élément à nettoyer avec le moyen de récupération, et des vannes commandant lesdites mises en communication.
- Dispositif selon la revendication précédente, comprenant une machine de transfert pouvant être interposée au moyen de vannes entre une sortie gazeuse du moyen de récupération et l'entrée de l'élément pour effectuer l'étape de rinçage par le gaz liquéfié.
- Dispositif comprenant une pompe à vide pouvant être mise en communication au moyen de vannes avec l'ensemble du circuit de nettoyage pour une mise au vide.
- Dispositif selon l'unes des revendications 15 à 18 comprenant un bloc composé desdites vannes avec des moyens de raccordement à au moins l'un des organes suivants : la source de fluide nettoyage, le moyen de récupération, une machine de transfert, une pompe à vide ou l'élément de l'installation frigorifique à nettoyer.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0204785 | 2002-04-17 | ||
FR0204785A FR2838658B1 (fr) | 2002-04-17 | 2002-04-17 | Produit pour le nettoyage d'installations frigorifiques, procede et dispositif pour sa mise en oeuvre |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1354985A1 true EP1354985A1 (fr) | 2003-10-22 |
EP1354985B1 EP1354985B1 (fr) | 2010-02-24 |
Family
ID=28459902
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03290960A Expired - Lifetime EP1354985B1 (fr) | 2002-04-17 | 2003-04-17 | Produit pour le nettoyage d'installations frigorifiques, procédé et dispositif pour sa mise en oeuvre |
Country Status (6)
Country | Link |
---|---|
US (1) | US6877337B2 (fr) |
EP (1) | EP1354985B1 (fr) |
AT (1) | ATE458840T1 (fr) |
CA (1) | CA2425431A1 (fr) |
DE (1) | DE60331381D1 (fr) |
FR (1) | FR2838658B1 (fr) |
Cited By (1)
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)
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 |
WO2016079730A1 (fr) * | 2014-11-17 | 2016-05-26 | Ohayon Yehoshua | Système et procédé pour rincer et nettoyer un système de conditionnement d'air |
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 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0753557A1 (fr) * | 1995-07-13 | 1997-01-15 | The Procter & Gamble Company | Compositions moussante emballée |
EP0753559A1 (fr) * | 1995-07-13 | 1997-01-15 | The Procter & Gamble Company | Procédé de nettoyage de matériaux textiles |
EP0937771A1 (fr) * | 1998-02-19 | 1999-08-25 | The Procter & Gamble Company | Compositions liquides détergentes et moussantes |
DE10012492A1 (de) * | 2000-03-15 | 2001-09-27 | Henkel Kgaa | Reinigungsmittel |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3947567A (en) * | 1970-08-08 | 1976-03-30 | Phoenix Research Inc. | Effervescent cleansers |
US4222886A (en) * | 1978-08-21 | 1980-09-16 | Connelly Jr George F | Pumpable pipe cleaning composition |
US4623399A (en) * | 1985-02-04 | 1986-11-18 | Dowell Schlumberger Incorporated | Solvent for removing iron oxide deposits |
JPH0672239B2 (ja) * | 1986-08-21 | 1994-09-14 | タイホ−工業株式会社 | 艶出し洗浄方法 |
US5179840A (en) * | 1989-10-16 | 1993-01-19 | The Boc Group Plc | Cryogenic treatment methods |
US5189882A (en) * | 1990-12-17 | 1993-03-02 | B M, Inc. | Refrigerant recovery method |
US5265629A (en) * | 1991-05-10 | 1993-11-30 | Applied Hydro Dynamics, Inc. | Universal cleaning system utilizing cavitating fluid |
US5363662A (en) * | 1992-06-30 | 1994-11-15 | Todack James J | Refrigerant recovery and recycling method and apparatus |
US5316591A (en) * | 1992-08-10 | 1994-05-31 | Hughes Aircraft Company | Cleaning by cavitation in liquefied gas |
JP3328344B2 (ja) * | 1992-12-22 | 2002-09-24 | タイホー工業株式会社 | 発泡型洗浄艶出し剤の発泡状態保持時間を制御する方法 |
US5390503A (en) * | 1993-11-10 | 1995-02-21 | Cheng; Jung-Yuan | Recovery and recycling system for refrigerant |
US5606860A (en) * | 1994-03-07 | 1997-03-04 | Popp; James L. | Process and apparatus for cryogenically cleaning residue from containers and reducing the bulk volume thereof |
US5415003A (en) * | 1994-04-14 | 1995-05-16 | Bertva; John T. | Method for removing original type lubricant from air conditioning system and injecting replacement oil |
-
2002
- 2002-04-17 FR FR0204785A patent/FR2838658B1/fr not_active Expired - Lifetime
-
2003
- 2003-04-17 EP EP03290960A patent/EP1354985B1/fr not_active Expired - Lifetime
- 2003-04-17 US US10/418,590 patent/US6877337B2/en not_active Expired - Fee Related
- 2003-04-17 DE DE60331381T patent/DE60331381D1/de not_active Expired - Fee Related
- 2003-04-17 AT AT03290960T patent/ATE458840T1/de not_active IP Right Cessation
- 2003-04-17 CA CA002425431A patent/CA2425431A1/fr not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0753557A1 (fr) * | 1995-07-13 | 1997-01-15 | The Procter & Gamble Company | Compositions moussante emballée |
EP0753559A1 (fr) * | 1995-07-13 | 1997-01-15 | The Procter & Gamble Company | Procédé de nettoyage de matériaux textiles |
EP0937771A1 (fr) * | 1998-02-19 | 1999-08-25 | The Procter & Gamble Company | Compositions liquides détergentes et moussantes |
DE10012492A1 (de) * | 2000-03-15 | 2001-09-27 | Henkel Kgaa | Reinigungsmittel |
Cited By (1)
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 |
---|---|
US6877337B2 (en) | 2005-04-12 |
EP1354985B1 (fr) | 2010-02-24 |
FR2838658A1 (fr) | 2003-10-24 |
CA2425431A1 (fr) | 2003-10-17 |
US20040103682A1 (en) | 2004-06-03 |
DE60331381D1 (de) | 2010-04-08 |
FR2838658B1 (fr) | 2005-01-28 |
ATE458840T1 (de) | 2010-03-15 |
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