EP1805464B1 - Method for washing cooling or air conditioning circuits and device for carrying out said method - Google Patents
Method for washing cooling or air conditioning circuits and device for carrying out said method Download PDFInfo
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- 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
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- Prior art keywords
- cooling
- conditioning circuit
- air conditioning
- air
- washing agent
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- 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
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- 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.
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- 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)
- Crystals, And After-Treatments Of Crystals (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Detergent Compositions (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Durchspülen von Kühl- oder Klimakreisen, bei dem durch diesen Kühl- oder Klimakreis ein Durchspülmittel geleitet wird, das die in den Kühl- oder Klimakreisen anhaftenden löslichen Stoffe löst und absorbiert und die mechanischen Verunreinigungen austrägt. Die Erfindung betrifft weiterhin auch eine Vorrichtung zum Durchspülen von Kühl- oder Klimakreisen zur Durchführung des Verfahrens, die aus einem Druckbehälter mit einem Durchspülmittel besteht, der mit seinem Abzugsrohr für Flüssigkeit mit dem durchgespülten Kühl- oder Klimakreis verbunden ist, hinter dem ein Kompressor und ein Kondenser eingeschaltet ist, der mit einer Zuleitung für Flüssigkeit in den Druckbehälter verbunden ist.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.
Das Durchspülen von Kühl- oder Klimakreisen wird nach dem absaugen des Kühlmittels zwecks Beseitigung von unerwünschten Verunreinigungen, insbesondere während der Instandhaltung und Reparaturen, vorgenommen.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.
Die bis jetzt bekannten Vorrichtungen zum Durchspülen von Kühl- oder Klimakreisen funktionieren auf die Weise, dass durch den Kühl- oder Klimakreis ein Durchspülmittel geleitet wird, das die in dem Kühl- oder Klimakreisen anhaftenden löslichen Stoffe löst und absorbiert und die mechanischen Verunreinigungen austrägt. Das Durchspülmittel selbst, das für die Umwelt unschädlich sein sollte, muss gleichzeitig womöglich hones Lösungsvermögen aufweisen und es muss auch ein Verfahren zu einer einfachen Regeneration dieses Durchspülmittels, d.h. Abscheidung der aufgelösten Stoffe, insbesondere Öle und mechanischer Verunreinigungen, vorliegen,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,
Die bis jetzt bekannten Vorrichtungen zum Durchspülen von Kühl- oder Klimakreisen arbeiten derart, dass
- a) Das Durchspülmittels wird mittels einer Flüssigkeitspumpe wiederholt durch den durchgespülten Kühl- oder Klimakreis geleitet.
- b) Das Durchspülmittel wird in einem Behälter unter Druck, üblicherweise unter Druckstickstoff, gehalten.
- c) Die Dämpfe des Durchspülmittels werden mittels eines Kompressors angesaugt. Eine Änderung des Aggregatzustandes erfolgt unter Nutzung der Kondensationswärme aus dem Kompressor gewöhnlich in einem Wärmetauscher.
- a) The flushing agent is repeatedly passed through the flushed cooling or air conditioning circuit by means of a liquid pump.
- b) The flushing agent is held in a container under pressure, usually under pressure nitrogen.
- c) The vapors of the flushing agent are sucked in by means of a compressor. A change in the state of aggregation is carried out using the heat of condensation from the compressor usually in a heat exchanger.
Nachteilig bei den bekannten Vorrichtungen ist insbesondere die lange Dauer der ganzen Operation, die zur Durchwaschen eines Kühl- oder Klimakreises erforderlich ist, hohe Masse dieser Vorrichtungen, Durchspülen mittels eines schon in dem Schritt a) verunreinigten Durchspülmittels, Unmöglichkeit einer Wiederholung des Zyklus in dem Schritt b) und Unmöglichkeit einer vollen und schnellen Entfernung derA 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
Reste des Durchspülmittels aus dem durchgespülten Kühl- oder Klimakreis. Nachteilig sind auch mögliche Flüchte der Medien in die Umwelt.Remains of the flushing agent from the purged cooling or air conditioning circuit. Disadvantages include possible escapes of the media in the environment.
Dokument
Die Aufgabe der Erfindung ist darum in Schaffen eines Verfahrens und Vorrichtung zum Durchspülen von Kühl- oder Klimakreisen zu sehen, die ein vollständiges Durchwaschen eines Kühl- oder Klimakreises in einer kurzen Zeit ermöglichen. Eine weitere Aufgabe der Erfindung ist eine Gewichtsverminderung der Vorrichtung und auch Sicherstellung einer zuverlässigen Entfernung des Durchspülmittels aus dem durchgespülten Kühl- oder Klimakreis. Eine weitere Aufgabe der Erfindung ist Sicherstellung einer zuverlässigen Funktion der Vorrichtung auch bei niedrigen Temperaturen der Umgebung.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.
Die angeführte Aufgabe löst und die Mängel der bekannten Verfahren dieser Art im wesentlichen beseitigt das Verfahren zum Durchspülen von Kühl- oder Klimakreisen, bei dem durch diesen Kühl- oder Klimakreis ein Durchspülmittel geleitet wird, das die in dem Kühl- oder Klimakreis anhaftenden löslichen Stoffe löst und absorbiert und die mechanischen Verunreinigungen austrägt, dessen Wesen der Erfindung nach darin besteht, dass das Durchspülmittel durch den durchgespülten Kühl- oder Klimakreis in einem geschlossenem Kreislauf und ohne Entweichen in äußere Umgebung durch einen Druckunterschied zwischen dem Druckbehälter und der Destillierkammer geleitet wird und nach der Reinigung in einer Destillierkammer, Verpressen durch einen Kompressor undThe 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
Abkühlung in einem Kondenser zurück in den Druckbehälter geführt wird.Cooling is performed in a condenser back into the pressure vessel.
Es ist von Vorteil, wenn das Durchspülmittel zwecks Erhöhung der Intensität des Durchwaschens und einer leichteren Ablösung von Unvereinigungen durch den durchgespülten Kühl-oder Klimakreis pulsartig geleitet wird.It is advantageous if the 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.
Weiter, es ist zwecks Ersparung von Energiekosten vorteilhaft, wenn das Durchspülmittel zwischen dem Kompressor und dem Kcndenser durch einen in der Destillierkammer befindlichen Wärmetauscher geführt wird.Further, in order to save energy costs, it is advantageous if the flushing agent between the compressor and the condenser is passed through a heat exchanger located in the stilling chamber.
Für die Erreichung einer maximalen Geschwindigkeit der Entfernung des Durchspülmittels aus dem durchgespülten Kühl-oder Klimakreis ist weiter von Vorteil, wenn das Durchspülmittel durch den Druckunterschied zwischen der gasförmigen Phase in dem Druckbehälter und der Destillierkammer aus dem durchgespülten Kühl- oder Klimakreis in dem flüssigen Zustand direkt in die Destillierkammer verdrängt wird.For the achievement of a maximum speed of the removal of the flushing agent from the purged cooling or air conditioning circuit is further advantageous if the flushing through the pressure difference between the gaseous phase in the pressure vessel and the distillation of the purged cooling or air conditioning circuit in the liquid state directly is displaced into the distillation chamber.
Gegenstand der Erfindung ist auch eine Vorrichtung zum Durchspülen von Kühl- oder Klimakreisen, die aus einem Druckbehälter mit einem Durchspülmittel besteht, der mit seinem Abzugsrohr für Flüssigkeit mit dem durchgespülten Kühl-oder Klimakreis verbunden ist, hinter dem ein Kompressor und ein Kondenser eingeschaltet ist, der mit einer Zuleitung für Flüssigkeit in den Druckbehälter verbunden ist. Zwischen dem durchgespülten Kühl- oder Klimakreis und dem Kompressor ist eine Destillierkammer eingeschaltet und in dem Druckbehälter sich über dem Durchspülmittel komprimiertes Inertgas befindet.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.
Für die Betätigung der Vorrichtung und Erzielung einer pulsartigen Strömung des Durchspülmittels ist weiter vorteilhaft, wenn zwischen dem durchgespülten Kühl- oder Klimakreis und dem Druckbehälter das erste Solenoidventil und zwischen dem durchgespülten Kühl- oder Klimakreis und der Destillierkammer das zweite Solenoidventil eingeschaltet ist.For the operation of the device and achieving a pulse-like flow of the flushing means is further advantageous if 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.
Innerhalb der Destillierkammer ist vorzugsweise ein Niveaugeber des Durchspülmittels zur Betätigung von Solenoidventilen angeordnet.Within the distillation chamber, a level sensor of the flushing means for actuating solenoid valves is preferably arranged.
Schließlich, zwecks Minderung des Energieverbrauchs ist weiter von Vorteil, wenn zwischen dem Ausgang des Kompressors und dem Kondenser ein Wärmetauscher eingeschaltet ist, der innerhalb der Destillierkammer angeordnet ist und über den innerhalb der Destillierkammer der Niveaugeber des Durchspülmittels angeordnet ist.Finally, in order to reduce the energy consumption is further advantageous if between the output of the compressor and the condenser, 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.
Das Verfahren und Vorrichtung nach Erfindung basieren darauf, daß ein schneller Durchlauf des Durchspülmittels durch den durchgespülten Kühl- oder Klimakreis vor allem mittels des Druckunterschieds zwischen dem Druckbehälter und der Destillierkammer erreicht wird, sodass die Leistung des Kompressors aus dieser Sicht nicht wesentlich und eine ausreichende Leistung der ganzen Vorrichtung auch bei Verwendung eines Kompressors verhältnismäßig kleiner Leistung und unter niedrigen Außenraumtemperaturen gewährleistet ist.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.
Der Überdruck in dem Druckbehälter ist weiterhin zu einem schnellen Verdrängen des flüssigen reinen Durchspülmittels im flüssigen Zustand aus dem durchgespülten Kühl- oder Klimakreis in die Destillierkammer genutzt.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.
Das Wesen der Erfindung ist unten auf einem Ausführungsbeispiel erläutert, das auf der Basis einer angeschlossenen Zeichnung beschrieben ist, die ein Blockdiagramm der Vorrichtung zum Durchspülen von Kühl- oder Klimakreisen zeigt.The essence of the invention is explained below on an exemplary embodiment which is described on the basis of a connected drawing which shows a block diagram of the device for flushing cooling or air-conditioning circuits.
Die Vorrichtung zum Durchspülen von Kühl- oder Klimakreisen 27 nach Erfindung besteht aus einem Druckbehälter 9, der ein Durchspülmittel, zum Beispiel das Mittel Genesolv® von dem Firma Honeywell enthält. Das Volumen des Durchspülmittels im flüssigen Zustand in dem Druckbehälter 9, welcher unter Druck dadurch gehalten ist, dass oberhalb des Spiegels des Durchspülmittels in dem Druckbehälter z.B. mittels Stickstoffs ein Druck ca 5 Bar gehalten ist, ist zuverlässig, zum Beispiel um 30 %, größer als das vorausgesetzte Volumen des durchgespülten Kühl- oder Klimakreises 27. Der Druckbehälter 9 ist mit zumindest einem Abzugsrohr 91 für Flüssigkeit, das bis zu dem Boden dieses Druckbehälters 9 eingreift, und mit zumindest einem, vorzugsweise zwei Zuleitungen 92, 93 für Gas, die in dem Gasraum in dem Druckbehälter 9 oberhalb des Spiegels des Durchspülmittels enden. An das Abzugsrohr 91 für Flüssigkeit ist das erste Ventil 20 angeschlossen, hinter dem das erste Anschlußstück 17 angeordnet ist, hinter dem das erste Solenoidventil 8 folgt, durch das das Durchspülmittel weiter in das erste Schauloch 7 fließt, durch das das Durchspülmittel in einen nur schematisch angedeuteten Kühl- oder Klimakreis 27 strömt. Nach dem Durchgang durch den Kühl- oder Klimakreis 27 strömt das verunreinigte Durchspülmittel durch ein anderes Schauloch 6 zu einem anderen Solenoidventil 21, vor dem sein Druck durch das erste Manometer 16 gemessen wird. Durch dieses Solenoidventil 21 strömt das Durchspülmittel zu dem Boden einer Destillierkammer 1, die mit einem Heizkörper 4, zum Beispiel mit einem elektrischen Heizkörper, versehen ist. Das Durchspülmittel, welches unter einem atmosphärischen Drucks einen Siedepunkt typisch ca 15 °C aufweist, wird erwärmt, schnell verdampft und wird aus dem oberen Teil der Destillierkammer 1 in den Kompressor 14 ausgezogen, woher dann das Durchspülmittel durch das Rückschlagventil 25 und einen Ölabscheider 12 in einen Wärmetauscher 3 strömt, wo zur Erwärmung der Destillierkammer 1 beitragt, woher in einen Kondenser 11 mit einem angedeuteten Ventilator geleitet wird, hinter dem das zweite Manometer 13 angeschlossen ist. Aus dem Kondenser 11 wird dann das schon flüssige Durchspülmittel über das zweite Anschlussstück 18 und das zweite Ventil 19 zurück in den Druckbehälter 9 geleitet. Der Ölausgang aus dem Ölabscheider 12 kann über das vierte Solenoidventil 15 zurück mit dem Saugeingang des Kompressors 14 verbunden sein.The device for flushing of cooling or
Hinter dem Kompressor 14 ist ein Hochdruckpressostat 10 angeschlossen und über einen Schlauch 26 ist auch das erste Auslaßventil 28 angeschlossen. Die Destillierkammer 1 ist weiter in ihrem Boden mit einem anderen Auslaßventil 5 für Verunreinigungen und Öl versehen, über dem Wärmetauscher 3 ist innerhalb der Destillierkammer 1 ein Niveaugeber 2, zum Beispiel ein Schwimmergeber, angeordnet und an der Wand der Destillierkammer 1 ist ein Sicherheitsthermostat 24 des Behälters der Destillierkammer 1 angeordnet, während an dem Heizkörper 4 innerhalb der Destillierkammer 1 ein Arbeitsthermostat 23 für das Heizen angeordnet ist.Behind the
Die Arbeitsweise der Vorrichtung zum Durchspülen von Kühl-oder Klimakreisen nach der Erfindung ist im Einklang mit dem beschriebenen Ausführungsbeispiel wie folgt:The operation of the device for flushing of cooling or air conditioning according to the invention is in accordance with the described embodiment as follows:
Das Durchspülmittel wird in dem Druckbehälter 9 gelagert, der mittels Stickstoffs unter einem Druck ca 5 Bar gehalten wird, wobei das Durchspülmittel in der Form von Flüssigkeit maximal 2/3 des Volumens des Druckbehälters 9 einnimmt. Das Volumen des Durchspülmittels in dem Druckbehälter 9 ist zumindest um 30 % größer als das vorausgesetzte Volumen des durchgespülten Kühl- oder Klimakreises 27, der Verbindungsschläuche und der Destillierkammer 1.The flushing agent is stored in the
Nach der Einschaltung des durchgespülten Kühl- oder Klimakreises 27 in den Kreis mittels der Anschlüsse IN, OUT ist es notwendig zunächst mittels des Kompressors 14 die Luft aus dem durchgespülten Kühl- oder Klimakreis 27 und der Destillierkammer 1 absaugen. Diese Luft wird durch den Schlauch 26 mit einem ersten Ablassventil 28 herausgelassen. Das Rückschlagventil 25 ist bei diesem Schritt geschlossen.After switching on the purged cooling or
Die Luft wird bis auf den Druck ungefähr von - 0,5 Bar abgesaugt.The air is sucked down to the pressure of approximately -0.5 bar.
Es werden das erste Solenoidventil 8 und das zweite Solenoidventil 21 geöffnet und das Durchspülmittel strömt durch den durchgespülten Kühl- oder Klimakreis 27 in die Destillierkammer 1 mit einer Geschwindigkeit, die durch den Druckunterschied zwischen dem Druckbehälter 9 und der Destillierkammer 1 gegeben ist. Gleichzeitig läuft der Kompressor 14 und heizt der Heizkörper 4. Sobald eine Auffüllung der Destillierkammer 1 eintritt, werden durch den Niveaugeber 2, zum Beispiel einen Schwimmergeber, die Solenoidventile 8 und 21 geschlossen. Das Durchspülmittel in der Destillierkammer 1 wird auf den Siedepunkt erwärmt und die Dämpfe werden mittels des Kompressors 14 abgesaugt, weiter über den Wärmetauscher 3 in den Kondenser 11 und in dem verflüssigten Zustand zurück in den Druckbehälter 9 geleitet. Für das Durchwaschen des Kühl- oder Klimakreises 27 reicht gewöhnlich ein Zyklus, es ist jedoch möglich diesen Zyklus zu wiederholen.The first solenoid valve 8 and the second solenoid valve 21 are opened, and the flushing agent flows through the purged cooling or
Die Operation ist zum Abschluss durch Öffnen des dritten Solenoidventils 22 bei geschlossenem erstem Solenoidventil 8 und geöffneten zweitem Solenoidventil 21 gebracht. Durch den Stickstoff, der in dem Druckbehälter 9 unter Druck gehalten wird, wird das Durchspülmittel im flüssigen Zustand in die Destillierkammer 1 verdrängt. Hier kann dieses Durchspülmittel effektiv erwärmt und erneut destilliert werden.The operation is completed by opening the
Mit Rücksicht auf den Siedepunkt des Durchspülmittels, welcher in dem Fall des Mittels Genesolv® unter Luftdruck typisch bei 15 °C liegt, ist ohne das beschriebene Verfahren praktisch unmöglich, die Flüssigkeit aus dem durchgespülten Kühl- oder Klimakreis 27 zu verdampfen, insbesondere bei niedrigen Außenraumtemperaturen.With regard to the boiling point of the rinse aid, which is typically 15 ° C under atmospheric pressure in the case of Genesolv®, it is virtually impossible to evaporate the liquid from the rinsed cooling or
Für eine effektive Tätigkeit der Anlage nach der Erfindung ist wesentlich, daß in den Druckbehälter 9 nach der Destillation in der Destillierkammer 1 jeweils ein reines Durchspülmittel zurückgeleitet wird, sodass der durchgespülte Kühl- oder Klimakreis 27 immer durch ein reines Durchspülmittel durchgespült wird.For an effective operation of the system according to the invention is essential that in the
Die Durchflussgeschwindigkeit des Durchspülmittels durch den durchgespülten Kühl- oder Klimakreis 27 hängt überwiegend nur von dem Druckunterschied zwischen dem Druckbehälter 9 und der Destillierkammer 1 ab und ist nur gering von der Leistung des Kompressors 14 abhängig, dessen Leistung darum nicht zu hoch sein braucht.The flow rate of the flushing through the purged cooling or
Das Durchspülen des Kühl- oder Klimakreises 27 wird pulsartig verwirklicht, was durch das Öffnen und Schließen der Solenoidventile 8 und 21 erzielt wird. Diese Pulse in Verbindung mit hoher Durchflussgeschwindigkeit des Durchspülmittels stellen ein vollständiges Durchwaschen des Kühl- oder Klimakreises 27 innerhalb einer kurzen Zeit sicher.The flushing of the cooling or
Der Druckbehälter 9 weist zumindest ein gesondertes Abzugsrohr 91 für Flüssigkeit und eine, beziehungsweise zwei Zuleitungen 92, 93 für Gas auf und wird mittels Stickstoffs unter Druck gehalten.The
Die Destillierkammer 1 wird durch den Heizkörper 4, zum Beispiel elektrischen, mit einem Arbeitsthermostat 23, und einen Wärmetauscher 3 aus dem Druckausgang des Kompressors 14 beheizt. Der Spiegel des Durchspülmittels innerhalb der Destillierkammer 1 wird durch den Niveaugeber 2, zum Beispiel einen Schwimmergeber, geregelt. Im Rahmen der Destillation wird von dem Durchspülmittel Öl, mechanische Verunreinigungen und teilweise auch Wasser abgeschieden. Die Reste des flüssigen Durchspülmittels werden am Ende des Zyklus aus dem Kühl- oder Klimakreis 27 durch Pulse des Druckstickstoffs verdrängt, die durch das Öffnen und Schließen des dritten Solenoidventils 22 erzielt werden. Dadurch werden gleichzeitig auch die eventuell übrigbleibenden mechanischen Verunreinigungen und das Durchspülmittel im flüssigen Zustand weggeschafft. Mittels dieser Lösung wird zusätzlich das ganze Verfahren grundsätzlich beschleunigt, insbesondere bei niedrigen Außenraumtemperaturen.The
- 11
- Destillierkammerdistillation chamber
- 22
- Niveaugeberlevel sensor
- 33
- Wärmetauscherheat exchangers
- 44
- Heizkörperradiator
- 55
- zweites Ablaßventil (für Verunreinigungen und Öl)second drain valve (for impurities and oil)
- 66
- zweites Schaulochsecond show-eye
- 77
- erstes Schaulochfirst lookout
- 88th
- erstes Solenoidventilfirst solenoid valve
- 99
- Druckbehälterpressure vessel
- 9191
- Abzugsrohr für FlüssigkeitDischarge pipe for liquid
- 9292
- Zuleitung für FlüssigkeitSupply line for liquid
- 9393
- Zuleitung für GasSupply line for gas
- 1010
- Hochdruck-PressostatHigh-pressure switch
- 1111
- Kondensercondenser
- 1212
- Ölabscheideroil separator
- 1313
- zweites Manometersecond manometer
- 1414
- Kompressorcompressor
- 1515
- viertes Solenoidventilfourth solenoid valve
- 1616
- erstes Manometerfirst manometer
- 1717
- erstes Anschlußstückfirst fitting
- 1818
- zweites Anschlußstücksecond connector
- 1919
- zweites Ventilsecond valve
- 2020
- erstes Ventilfirst valve
- 2121
- zweites Solenoidventilsecond solenoid valve
- 2222
- drittes Solenoidventilthird solenoid valve
- 2323
- Arbeitsthermostat für das HeizenWorking thermostat for heating
- 2424
-
Sicherheitsthermostat (des Behälters der Destillierkammer 1)Safety thermostat (of the
distillation chamber 1 tank) - 2525
- Rückschlagventilcheck valve
- 2626
- Schlauchtube
- 2727
- Kühl- oder KlimakreisCooling or air conditioning circuit
- 2828
- erstes Auslaßventilfirst outlet valve
Claims (8)
- A method of flushing a cooling or air-conditioning circuit (27), during which a washing agent running through the cooling or air-conditioning circuit (27) dissolves and absorbs in the cooling or air-conditioning circuit (27) caught up compounds and carries out mechanical impurities, characterized in that the method comprises circulating the washing agent in the cooling or air-conditioning circuit (27) within an enclosed cycle and without any outside leaks, due to a difference in pressures between a pressurized vessel (9) and a distilling chamber (1) and returning back the washing agent to the pressurized vessel (9) after its cleaning in the distilling chamber (1), pressurized by the compressor (14), and cooling down in a condenser (11).
- The method according to claim 1, characterized in that the washing agent is pulse circulated in a sluiced cooling or air-conditioning circuit (27).
- The method according to claim 1 or 2, characterized in that the washing agent runs between the compressor (14) and the condenser (11) through a heat exchanger (3) in the distilling chamber (1).
- The method according to claims 1 to 3, characterized in that the washing agent is pushed out from the cooling or air-conditioning circuit (27) in a liquid state directly to the distilling chamber (1) by the difference in pressures in a gas stage in the pressurized vessel (9) and the distilling chamber (1).
- A device for the flushing of the cooling or air-conditioning circuit (27) for performing the process, according to claims 1 to 4, the device comprising the pressurized vessel (9) containing the washing agent, which is connected through a liquid outflow (91) with the cooling or air-conditioning circuit (27), behind which there is the compressor (14) and a condenser (11) connected through a liquid inflow (2) with the pressurized vessel (9), characterized In that the distilling chamber (1) is fitted between the cooling or air-conditioning circuit (27) and the compressor (14) and wherein pressurized inert gas is in the pressurized vessel (9) above the washing agent.
- The device according to claim 5, characterized in that a first solenoid valve (8) is inserted between the cooling or air-conditioning circuit (27) and the pressurized vessel (9) and a second solenoid valve (22) is fitted between the cooling or air-conditioning circuit (27) and the distilling chamber (1).
- The device according to any of the claims 5 and 6, characterized in that a washing agent level gauge (2) is placed inside the distilling chamber (1), which controls the first and second solenoid valves (8, 22).
- The device according to claim 5, characterized in that a heat exchanger (3) is fitted between a compressor (14) outflow and the condenser (11), and the heat exchanger (3) is placed in the distilling chamber (1), in which above the heat exchanger (3) the washing agent level gauge (2) is positioned.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CZ20040678A CZ297706B6 (en) | 2004-06-02 | 2004-06-02 | Method for washing cooling or air-conditioning circuits and apparatus for making the same |
| PCT/CZ2005/000046 WO2005119140A1 (en) | 2004-06-02 | 2005-06-02 | Method for washing cooling or air conditioning circuits and device for carrying out said method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1805464A1 EP1805464A1 (en) | 2007-07-11 |
| EP1805464B1 true EP1805464B1 (en) | 2009-03-04 |
Family
ID=34970575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05745028A Not-in-force EP1805464B1 (en) | 2004-06-02 | 2005-06-02 | Method for washing cooling or air conditioning circuits and device for carrying out said method |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7827808B2 (en) |
| EP (1) | EP1805464B1 (en) |
| AT (1) | ATE424536T1 (en) |
| CZ (1) | CZ297706B6 (en) |
| DE (1) | DE502005006765D1 (en) |
| WO (1) | WO2005119140A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006030698B3 (en) * | 2006-06-30 | 2008-03-06 | Danfoss A/S | Refrigerant exchange arrangement |
| 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 (en) * | 1999-10-18 | 2001-04-27 | Taiji Kurokawa | Cleaning device for refrigerating cycle |
| JP2003302128A (en) * | 2002-04-12 | 2003-10-24 | Shinryo Corp | Method and device for cleaning refrigerant pipe of air- conditioning refrigeration unit |
| FR2838658B1 (en) * | 2002-04-17 | 2005-01-28 | Dehon Sa | PRODUCT FOR CLEANING REFRIGERATING PLANTS, METHOD AND DEVICE FOR IMPLEMENTING IT |
| US20040231702A1 (en) * | 2003-05-22 | 2004-11-25 | Honeywell International Inc. | Flushing for refrigeration system components |
-
2004
- 2004-06-02 CZ CZ20040678A patent/CZ297706B6/en not_active IP Right Cessation
-
2005
- 2005-06-02 WO PCT/CZ2005/000046 patent/WO2005119140A1/en active Application Filing
- 2005-06-02 AT AT05745028T patent/ATE424536T1/en not_active IP Right Cessation
- 2005-06-02 US US11/597,998 patent/US7827808B2/en not_active Expired - Fee Related
- 2005-06-02 EP EP05745028A patent/EP1805464B1/en not_active Not-in-force
- 2005-06-02 DE DE502005006765T patent/DE502005006765D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CZ297706B6 (en) | 2007-03-07 |
| US7827808B2 (en) | 2010-11-09 |
| US20080022715A1 (en) | 2008-01-31 |
| CZ2004678A3 (en) | 2006-01-11 |
| EP1805464A1 (en) | 2007-07-11 |
| ATE424536T1 (en) | 2009-03-15 |
| DE502005006765D1 (en) | 2009-04-16 |
| WO2005119140A1 (en) | 2005-12-15 |
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