EP1805464B1 - 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 verfahrens Download PDF

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Publication number
EP1805464B1
EP1805464B1 EP05745028A EP05745028A EP1805464B1 EP 1805464 B1 EP1805464 B1 EP 1805464B1 EP 05745028 A EP05745028 A EP 05745028A EP 05745028 A EP05745028 A EP 05745028A EP 1805464 B1 EP1805464 B1 EP 1805464B1
Authority
EP
European Patent Office
Prior art keywords
cooling
conditioning circuit
air conditioning
air
washing agent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP05745028A
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German (de)
English (en)
French (fr)
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EP1805464A1 (de
Inventor
Janda Frantisek
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.)
Ekotez sro
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Ekotez sro
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Publication date
Application filed by Ekotez sro filed Critical Ekotez sro
Publication of EP1805464A1 publication Critical patent/EP1805464A1/de
Application granted granted Critical
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Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 of cooling or air conditioning, in which a flushing agent is passed through this cooling or air conditioning circuit, which dissolves and absorbs the adhering to the cooling or air conditioning soluble substances and discharges the mechanical impurities.
  • the invention further relates to a device for purging of cooling or air conditioning circuits for performing the method, which consists of a pressure vessel with a flushing means, which is connected to its drainage pipe for liquid with the purged cooling or air conditioning circuit, behind which a compressor and a Condenser is connected, which is connected to a supply line for liquid in the pressure vessel.
  • the flushing of cooling or air conditioning circuits is carried out after the extraction of the coolant for the purpose of eliminating undesired contaminants, in particular during maintenance and repairs.
  • the hitherto known devices for flushing of cooling or air conditioning circuits operate in such a way that a flushing agent is passed through the cooling or air conditioning circuit, which adhering to the cooling or climatic circuits dissolves and absorbs soluble substances and discharges the mechanical impurities.
  • the rinsing agent itself which should be harmless to the environment, must at the same time possibly have hone dissolving power and there must also be a process for a simple regeneration of this rinsing agent, ie separation of the dissolved substances, in particular oils and mechanical impurities,
  • a disadvantage of the known devices is in particular the long duration of the whole operation, which is required to wash a cooling or climatic circuit high mass of these devices, flushing by means of a already in the step a) contaminated flushing means, impossibility of repeating the cycle in the step b) and impossibility of full and rapid removal of the
  • the object of the invention is therefore to be seen in creating a method and apparatus for flushing of cooling or air conditioning circuits that allow a complete washing of a cooling or air conditioning circuit 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 purged cooling or air conditioning circuit. Another object of the invention is to ensure reliable operation of the device even at low ambient temperatures.
  • the stated object solves and the shortcomings of the known methods of this type substantially eliminates the method for flushing of cooling or air conditioning, in which a cooling agent is passed through this cooling or air conditioning, which dissolves the adhering in the cooling or air conditioning soluble substances and absorbs and discharges the mechanical contaminants
  • the essence of the invention is that the flushing agent is passed through the purged cooling or air conditioning circuit in a closed circuit and without escape to the outside environment by a pressure difference between the pressure vessel and the distillation chamber and after Cleaning in a distillation chamber, compression by a compressor and
  • Cooling is performed in a condenser back into the pressure vessel.
  • flushing agent is pulsed in order to increase the intensity of the wash-through and easier disassociation by the purged cooling or air conditioning circuit.
  • flushing agent between the compressor and the condenser is passed through a heat exchanger located in the stilling chamber.
  • the invention also provides a device for flushing cooling or air conditioning circuits, which consists of a pressure vessel with a flushing means, which is connected to its drainage pipe for liquid with the purged cooling or air conditioning circuit, behind which a compressor and a condenser is turned on, which is connected to a supply line for liquid in the pressure vessel. Between the purged cooling or air conditioning circuit and the compressor is a distillation chamber is turned on and in the pressure vessel is located above the flushing means compressed inert gas.
  • the second solenoid valve is turned on between the purged cooling or air conditioning circuit and the pressure vessel, the first solenoid valve and between the purged cooling or air conditioning circuit and the distillation chamber.
  • a level sensor of the flushing means for actuating solenoid valves is preferably arranged.
  • a heat exchanger is switched on, which is arranged within the distillation and over which is arranged within the distillation of the level sensor of the flushing means.
  • the method and apparatus according to the invention are based on the fact that a fast passage of the flushing through the purged cooling or air conditioning circuit is achieved mainly by means of the pressure difference between the pressure vessel and the distillation chamber, so that the performance of the compressor from this point of view is not essential and sufficient performance the entire device is ensured even when using a compressor of relatively low power and low outdoor temperatures.
  • the overpressure in the pressure vessel is further used for a rapid displacement of the liquid pure flushing agent in the liquid state from the purged cooling or air conditioning circuit in the distillation chamber.
  • the device for flushing of cooling or air conditioning circuits 27 consists of a pressure vessel 9, which contains a flushing agent, for example the agent Genesolv® from the company Honeywell.
  • a flushing agent for example the agent Genesolv® from the company Honeywell.
  • the volume of the flushing agent in the liquid state in the pressure vessel 9, which is held under pressure that above the mirror of the flushing agent in the pressure vessel, for example by means of nitrogen, a pressure ca 5 bar is maintained, is reliable, for example, by 30%, greater than the presumed volume of the purged cooling or air conditioning circuit 27.
  • the pressure vessel 9 is provided with at least one drainage pipe 91 for liquid, which engages to the bottom of this pressure vessel 9, and with at least one, preferably two supply lines 92, 93 for gas, in the Gas space in the pressure vessel 9 above the mirror of the Flushing ends.
  • the first valve 20 is connected, behind which the first connector 17 is arranged, behind which the first solenoid valve 8 follows, through which the flushing means further flows into the first sight hole 7, through which the flushing means in a only 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 means flows to the bottom of a distillation chamber 1, which is provided with a radiator 4, for example with an electric heater.
  • the flushing agent which has a boiling point typically about 15 ° C under an atmospheric pressure, is heated, rapidly evaporated and is drawn from the upper part of the distillation chamber 1 in the compressor 14, where then the flushing through the check valve 25 and an oil separator 12 in a heat exchanger 3 flows, where contributes to the heating of the distillation chamber 1, from where in a condenser 11 is passed with an indicated fan, behind which the second pressure gauge 13 is connected. From the condenser 11, the already liquid flushing agent is then passed back into the pressure vessel 9 via the second connecting piece 18 and the second valve 19. The oil exit from the oil separator 12 may be connected back to the suction inlet of the compressor 14 via the fourth solenoid valve 15.
  • the distillation chamber 1 is further provided in its bottom with another outlet valve 5 for impurities and oil, on the heat exchanger 3 is within the distillation chamber 1, a level sensor 2, for example, a float, arranged and on the wall of the distillation chamber 1 is a safety thermostat 24 of Container of the distillation chamber 1, while disposed on the radiator 4 within the distillation chamber 1, a working thermostat 23 for heating.
  • the flushing agent is stored in the pressure vessel 9, which is held by means of nitrogen under a pressure about 5 bar, wherein the flushing agent occupies a maximum of 2/3 of the volume of the pressure vessel 9 in the form of liquid.
  • the volume of the flushing agent in the pressure vessel 9 is at least 30% greater than the assumed volume of the purged cooling or air conditioning circuit 27, the connecting tubes and the distillation chamber. 1
  • the air is sucked down to the pressure of approximately -0.5 bar.
  • the first solenoid valve 8 and the second solenoid valve 21 are opened, and the flushing agent flows through the purged cooling or air conditioning circuit 27 into the distillation chamber 1 at a speed given by the pressure difference between the pressure vessel 9 and the distillation chamber 1.
  • the compressor 14 runs and heats the radiator 4.
  • the solenoid valves 8 and 21 are closed by the level sensor 2, for example, a float.
  • the flushing agent in the distillation chamber 1 is heated to the boiling point and the vapors are sucked by the compressor 14, further passed through the heat exchanger 3 in the condenser 11 and in the liquefied state back into the pressure vessel 9.
  • For the washing of the cooling or climatic circuit 27 usually one cycle is sufficient, 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 opened.
  • nitrogen which is held in the pressure vessel 9 under pressure, the flushing agent is displaced in the liquid state in the distillation chamber 1.
  • this sweeping agent can be effectively heated and redistilled.
  • the flow rate of the flushing through the purged cooling or air conditioning circuit 27 depends mainly only on the pressure difference between the pressure vessel 9 and the distillation chamber 1 and is only slightly dependent on the performance of the compressor 14, the power therefore need not be too high.
  • the flushing of the cooling or air conditioning circuit 27 is implemented in a pulse-like manner, which is achieved by the opening and closing of the solenoid valves 8 and 21. These pulses in conjunction with high flow rate of the sweep ensure complete washing of the refrigeration or air conditioning circuit 27 within a short time.
  • the pressure vessel 9 has at least one separate discharge pipe 91 for liquid and one or two Supply lines 92, 93 for gas and is held under pressure by means of nitrogen.
  • the distillation chamber 1 is heated by the radiator 4, for example electric, 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 controlled by the level sensor 2, for example a float sensor.
  • the level sensor 2 for example a float sensor.
  • the remains of the liquid rinsing agent are displaced at the end of the cycle from the cooling or air conditioning circuit 27 by pulses of the pressure nitrogen, which are achieved by the opening and closing of the third solenoid valve 22.
  • any remaining mechanical impurities and the flushing agent are removed in the liquid state at the same time.

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)
EP05745028A 2004-06-02 2005-06-02 Verfahren zum durchspülen von kühl- oder klimakreisen und vorrichtung zur durchführung des verfahrens Expired - Lifetime EP1805464B1 (de)

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 EP1805464A1 (de) 2007-07-11
EP1805464B1 true EP1805464B1 (de) 2009-03-04

Family

ID=34970575

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05745028A Expired - Lifetime 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 (cs)
EP (1) EP1805464B1 (cs)
AT (1) ATE424536T1 (cs)
CZ (1) CZ297706B6 (cs)
DE (1) DE502005006765D1 (cs)
WO (1) WO2005119140A1 (cs)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006030698B3 (de) * 2006-06-30 2008-03-06 Danfoss A/S Kältemittelaustauschanordnung
EP2526354B1 (en) * 2010-01-22 2017-09-13 MAHLE International GmbH A system and a method for the flushing of air condition systems
EP2539646B1 (en) * 2010-02-26 2019-07-03 Mahle International GmbH Method for recovering refrigerant of a refrieration equipment
US20230296300A1 (en) * 2022-03-17 2023-09-21 Carrier Corporation Refrigerant recovery device and method of operation

Family Cites Families (9)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
EP1805464A1 (de) 2007-07-11
CZ297706B6 (cs) 2007-03-07
ATE424536T1 (de) 2009-03-15
WO2005119140A1 (de) 2005-12-15
US7827808B2 (en) 2010-11-09
US20080022715A1 (en) 2008-01-31
DE502005006765D1 (de) 2009-04-16
CZ2004678A3 (cs) 2006-01-11

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