EP1805464A1 - Verfahren zum durchspülen von kühl- oder klimakreisen und vorrichtung zur durchführung des verfahrens - Google Patents
Verfahren zum durchspülen von kühl- oder klimakreisen und vorrichtung zur durchführung des verfahrensInfo
- Publication number
- EP1805464A1 EP1805464A1 EP05745028A EP05745028A EP1805464A1 EP 1805464 A1 EP1805464 A1 EP 1805464A1 EP 05745028 A EP05745028 A EP 05745028A EP 05745028 A EP05745028 A EP 05745028A EP 1805464 A1 EP1805464 A1 EP 1805464A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air conditioning
- cooling
- conditioning circuit
- distillation chamber
- compressor
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B45/00—Arrangements for charging or discharging refrigerant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
Definitions
- the invention relates to a method for flushing through cooling or air conditioning circuits, in which a flushing agent is passed through this cooling or air conditioning circuit, which dissolves and absorbs the soluble substances adhering to the cooling or air conditioning circuits and carries off the mechanical impurities.
- the invention further relates to a device for flushing cooling or air conditioning circuits for performing the method, which consists of a pressure vessel with a flushing agent, which is connected with its drain pipe for liquid to the flushed cooling or air conditioning circuit, behind which a compressor and a Condenser is switched on " , which is connected to a supply line for liquid in the pressure vessel.
- the cooling or air conditioning circuits are flushed out after the coolant has been drawn off in order to remove undesired impurities, in particular during maintenance and repairs.
- the hitherto known devices for flushing through cooling or air conditioning circuits function in such a way that a flushing agent is passed through the cooling or air conditioning circuit which adheres to the cooling or air conditioning circuits soluble substances dissolves and absorbs and carries away mechanical impurities.
- the washing agent itself which fürdie environment should be harmless, must at the same time might have high solubility and it must also be a process for a simple regeneration of this für Seriesmit ⁇ els, ie separation of the dissolved substances, especially oils and mechanical impurities are present,
- the flushing agent is repeatedly passed through the flushed cooling or air conditioning circuit by means of a liquid pump.
- the flushing agent is held in a container under pressure, usually under pressure nitrogen.
- a disadvantage of the known devices is, in particular, the long duration of the entire operation, which is necessary for washing through a cooling or air conditioning circuit, high mass of these devices, flushing using a flushing agent already contaminated in step a), impossibility of repeating the cycle in the step b) and impossibility of full and quick removal of the Remains of the flushing agent from the flushed cooling or air conditioning circuit. Possible media escape into the environment is also disadvantageous.
- the object of the invention is therefore to be seen in the creation of a method and device for flushing through cooling or air conditioning circuits which enable a cooling or air conditioning circuit to be completely washed through in a short time. Another object of the invention is to reduce the weight of the device and also to ensure reliable removal of the flushing agent from the flushed cooling or air conditioning circuit. Another object of the invention is to ensure reliable operation of the device even at low ambient temperatures.
- the flushing agent between the compressor and the condenser is passed through a heat exchanger located in the distillation chamber.
- the invention also relates to a device for flushing cooling or air conditioning circuits, which consists of a pressure container with a flushing agent, which is connected with its drain pipe for liquid to the flushed cooling or air conditioning circuit, behind which a compressor and a condenser is switched on a supply line for liquid is connected to the pressure vessel. Between the flushed cooling or air conditioning circuit and the compressor a distillation chamber is switched on and the pressure vessel contains compressed inert gas above the flushing agent.
- the first solenoid valve is switched on between the rinsed cooling or air conditioning circuit and the pressure vessel and the second solenoid valve is switched on between the cooling or air conditioning circuit and the still.
- a level sensor of the purging means for actuating solenoid valves is preferably arranged.
- a heat exchanger is connected between the outlet of the compressor and the condenser, which is arranged inside the distillation chamber and via which the level transmitter of the flushing agent is arranged inside the distillation chamber.
- the method and device according to the invention are based on the fact that a rapid passage of the flushing medium through the cooling or air-conditioning circuit that is flushed is achieved primarily by means of the pressure difference between the pressure vessel and the distillation chamber, so that the performance of the compressor is not essential from this point of view and sufficient performance the entire device is guaranteed even when using a compressor of relatively low power and under low outside temperatures.
- the excess pressure in the pressure vessel is also used to rapidly displace the pure liquid flushing agent in the liquid state from the flushed cooling or air conditioning circuit into the distillation chamber.
- the device for flushing through cooling or air conditioning circuits 27 consists of a pressure container 9 which contains a flushing agent, for example the agent Genesolv® from Honeywell.
- a flushing agent for example the agent Genesolv® from Honeywell.
- the pressure vessel 9 is provided with at least one drain pipe 91 for liquid, which engages down to the bottom of this pressure vessel 9, and with at least one, preferably two feed lines 92, 93 for gas, which are in the Gas space in the pressure vessel 9 above the level of the Rinse agent ends.
- the first valve 20 is connected to the drain pipe 91 for liquid, behind which the first connecting piece 17 is arranged, behind which the first solenoid valve 8 follows, through which the flushing agent flows further into the first inspection hole 7, through which the flushing agent only flows into one schematically indicated cooling or air conditioning circuit 27 flows.
- the contaminated flushing agent flows through another inspection hole 6 to another solenoid valve 21, before which its pressure is measured by the first pressure gauge 16.
- the flushing agent flows through this solenoid valve 21 to the bottom of a distillation chamber 1, which is provided with a heating element 4, for example with an electric heating element.
- the flushing agent which has a boiling point typically around 15 ° C under atmospheric pressure, is heated, evaporated quickly and is extracted from the upper part of the distillation chamber 1 into the compressor 14, from where the flushing agent then flows through the check valve 25 and an oil separator 12 in a heat exchanger 3 flows, where it contributes to the heating of the distillation chamber 1, from where is passed into a condenser 11 with an indicated fan, behind which the second manometer 13 is connected.
- the already rinsing agent which is already liquid, is then passed out of the condenser 11 back into the pressure vessel 9 via the second connecting piece 18 and the second valve 19.
- the oil outlet from the oil separator 12 can be connected back to the suction inlet of the compressor 14 via the fourth solenoid valve 15.
- a high-pressure pressostat 10 is connected behind the compressor 14 and the first one is also connected via a hose 26 Exhaust valve 28 connected.
- the distillation chamber 1 is further in its bottom with another outlet valve 5 for
- Destillierkarjner 1 is a safety thermostat 24 des
- Container of the distillation chamber 1 arranged while on the
- Radiator 4 a working thermostat 23 is arranged for heating within the distillation chamber 1.
- the flushing agent is stored in the pressure container 9, which is kept under a pressure of about 5 bar by means of nitrogen, the flushing agent in the form of liquid occupying a maximum of 2/3 of the volume of the pressure container 9.
- the volume of the flushing agent in the pressure vessel 9 is at least 30% larger than the presumed volume of the flushed cooling or air conditioning circuit 27, the connecting hoses and the distillation chamber 1.
- the first solenoid valve 8 and d ⁇ s second solenoid valve 21 is opened and the washing agent flows through the flushed cooling or air conditioning circuit 27 in the Destillierkarmer 1 at a speed which is given by the pressure difference between the pressure vessel 9, and the Destillierka ⁇ iuer. 1
- the compressor 14 runs and heats the radiator 4.
- the level sensor 2 for example a float sensor, closes the solenoid valves 8 and 21.
- the rinsing agent in the distillation chamber 1 is heated to the boiling point and the vapors are sucked off by means of the compressor 14, passed on via the heat exchanger 3 into the condenser 11 and in the liquefied state back into the pressure vessel 9.
- One cycle is usually sufficient for washing the cooling or air conditioning circuit 27, but it is possible to repeat this cycle.
- the operation is completed by opening the third solenoid valve 22 with the first solenoid valve 8 closed and the second solenoid valve 21 open.
- the flushing agent is displaced into the distillation chamber 1 in the liquid state by the nitrogen, which is kept under pressure in the pressure vessel 9.
- This flushing agent can be warmed up effectively and distilled again.
- the boiling point of the washing agent which Genesolv® is in the case of the agent under air pressure typically at 15 ° C, without the described method, practically '' impossible to evaporate the liquid from the flushed cooling or air-conditioning circuit 27, in particular at low outdoor temperatures.
- a pure rinsing agent is returned to the pressure vessel 9 after distillation in the distillation chamber 1, so that the flushed cooling or air conditioning circuit 27 is always rinsed by a pure rinsing agent.
- the flow rate of the flushing agent through the flushed cooling or air conditioning circuit 27 mainly depends only on the pressure difference between the pressure vessel 9 and the distillation chamber 1 and is only slightly dependent on the output of the compressor 14, the output of which therefore need not be too high.
- the flushing of the cooling or air conditioning circuit 27 is realized in a pulsed manner, which is achieved by opening and closing the solenoid valves 8 and 21. These pulses in conjunction with the high flow rate of the flushing agent ensure that the cooling or air conditioning circuit 27 is completely washed through within a short time.
- the pressure vessel 9 has at least one separate drain pipe 91 for liquid and one or two Supply lines 92, 93 for gas and is kept under pressure by means of nitrogen.
- the distillation chamber 1 is heated by the radiator 4, for example electrical, with a working thermostat 23 and a heat exchanger 3 from the pressure outlet of the compressor 14.
- the level of the flushing agent within the distillation chamber 1 is regulated by the level sensor 2, for example a vibrator.
- the level sensor 2 for example a vibrator.
- the residues of the liquid flushing agent are displaced from the cooling or air conditioning circuit 27 at the end of the cycle by pulses of the pressure nitrogen, which are achieved by the opening and closing of the third solenoid valve 22. This also removes any mechanical contaminants that may remain and the flushing agent in the liquid state. With this solution, the whole process is also fundamentally accelerated, especially at low outside temperatures.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Detergent Compositions (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CZ20040678A CZ297706B6 (cs) | 2004-06-02 | 2004-06-02 | Zpusob promývání chladicích nebo klimatizacních okruhu a zarízení pro provádení tohoto zpusobu |
PCT/CZ2005/000046 WO2005119140A1 (de) | 2004-06-02 | 2005-06-02 | Verfahren zum durchspülen von kühl- oder klimakreisen und vorrichtung zur durchführung des verfahrens |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1805464A1 true EP1805464A1 (de) | 2007-07-11 |
EP1805464B1 EP1805464B1 (de) | 2009-03-04 |
Family
ID=34970575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05745028A Not-in-force EP1805464B1 (de) | 2004-06-02 | 2005-06-02 | Verfahren zum durchspülen von kühl- oder klimakreisen und vorrichtung zur durchführung des verfahrens |
Country Status (6)
Country | Link |
---|---|
US (1) | US7827808B2 (de) |
EP (1) | EP1805464B1 (de) |
AT (1) | ATE424536T1 (de) |
CZ (1) | CZ297706B6 (de) |
DE (1) | DE502005006765D1 (de) |
WO (1) | WO2005119140A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006030698B3 (de) * | 2006-06-30 | 2008-03-06 | Danfoss A/S | Kältemittelaustauschanordnung |
WO2011088831A1 (en) * | 2010-01-22 | 2011-07-28 | Agramkow Fluid Systems A/S | A system and a method for the flushing of air condition systems |
WO2011104323A2 (en) * | 2010-02-26 | 2011-09-01 | Robert Bosch Gmbh | Method for recovering refrigerant of a refrieration equipment |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5168720A (en) * | 1990-09-26 | 1992-12-08 | Technical Chemical Company | Refrigerant recovery system with flush mode and associated flushing adapter apparatus |
US5174906A (en) * | 1991-09-27 | 1992-12-29 | Advanced Research Technologies | Flushing of heating, ventilating and air conditioning systems using environmentally safe materials |
US5181388A (en) * | 1991-11-05 | 1993-01-26 | Wynn's Climate Systems, Inc. | Refrigerant recovery unit with pure system |
US5709091A (en) * | 1992-06-30 | 1998-01-20 | Todack; James Joseph | Refrigerant recovery and recycling method and apparatus |
US6357240B1 (en) * | 1998-08-12 | 2002-03-19 | Hudson Technologies, Inc. | Apparatus and method for flushing a chiller system |
JP2001116408A (ja) * | 1999-10-18 | 2001-04-27 | Taiji Kurokawa | 冷凍サイクルの洗浄装置 |
JP2003302128A (ja) * | 2002-04-12 | 2003-10-24 | Shinryo Corp | 空調冷凍装置の冷媒配管を洗浄する方法と装置 |
FR2838658B1 (fr) * | 2002-04-17 | 2005-01-28 | Dehon Sa | Produit pour le nettoyage d'installations frigorifiques, procede et dispositif pour sa mise en oeuvre |
US20040231702A1 (en) * | 2003-05-22 | 2004-11-25 | Honeywell International Inc. | Flushing for refrigeration system components |
-
2004
- 2004-06-02 CZ CZ20040678A patent/CZ297706B6/cs not_active IP Right Cessation
-
2005
- 2005-06-02 EP EP05745028A patent/EP1805464B1/de not_active Not-in-force
- 2005-06-02 WO PCT/CZ2005/000046 patent/WO2005119140A1/de active Application Filing
- 2005-06-02 US US11/597,998 patent/US7827808B2/en not_active Expired - Fee Related
- 2005-06-02 DE DE502005006765T patent/DE502005006765D1/de not_active Expired - Fee Related
- 2005-06-02 AT AT05745028T patent/ATE424536T1/de not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO2005119140A1 * |
Also Published As
Publication number | Publication date |
---|---|
CZ297706B6 (cs) | 2007-03-07 |
ATE424536T1 (de) | 2009-03-15 |
US20080022715A1 (en) | 2008-01-31 |
CZ2004678A3 (cs) | 2006-01-11 |
WO2005119140A1 (de) | 2005-12-15 |
DE502005006765D1 (de) | 2009-04-16 |
EP1805464B1 (de) | 2009-03-04 |
US7827808B2 (en) | 2010-11-09 |
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