EP2853842A1 - Method for controlling an air conditioning system and apparatus for carrying out the method - Google Patents

Method for controlling an air conditioning system and apparatus for carrying out the method Download PDF

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Publication number
EP2853842A1
EP2853842A1 EP14450040.2A EP14450040A EP2853842A1 EP 2853842 A1 EP2853842 A1 EP 2853842A1 EP 14450040 A EP14450040 A EP 14450040A EP 2853842 A1 EP2853842 A1 EP 2853842A1
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EP
European Patent Office
Prior art keywords
heat exchanger
valves
compressor
mode
outdoor heat
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.)
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Application number
EP14450040.2A
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German (de)
French (fr)
Inventor
Matthias Weiss
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.)
Vossloh Kiepe GmbH Austria
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Vossloh Kiepe GmbH Austria
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Publication of EP2853842A1 publication Critical patent/EP2853842A1/en
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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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/0272—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using bridge circuits of one-way valves
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/28—Means for preventing liquid refrigerant entering into the compressor
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2519—On-off valves

Definitions

  • the invention relates to a method for controlling an air conditioning system with heat pump function, wherein the system comprises an indoor heat exchanger and an outdoor heat exchanger and a compressor and valves are arranged, which control the circulation of a refrigerant such that in one mode of operation of the indoor heat exchanger as the evaporator, in the operating mode other than condenser works.
  • the invention is a device for carrying out the method according to the invention.
  • Compressors in air conditioners and heat pumps can only compress gaseous refrigerant, they break down when aspirating liquid fractions.
  • a liquid separator is installed in the refrigeration circuit to protect the compressor with to make sure that no liquid components are sucked by the compressor.
  • the necessary arrangement of a liquid separator increases the cost of the known systems and also requires a complex construction.
  • the invention has set itself the goal of providing a method of the type mentioned in the application no liquid separator is required.
  • This method is characterized in that the mode change pressure equalization is performed by the compressor stopped and the inner and the outer heat exchanger are connected by switching the valves directly, whereupon the pressure in the valves and in-between heat exchanger after entering a pressure and temperature compensation the desired operating mode corresponding position are brought and the compressor is set in motion.
  • An apparatus for carrying out the method according to the invention is characterized in that the compressor upstream of two valves and two valves downstream, depending on the mode of operation of one of the valves to the outdoor heat exchanger, the other is switchable to the indoor heat exchanger.
  • the gaseous state is indicated by dots
  • the liquid state of the refrigerant in the respective regions is indicated by waves.
  • the compressor 12 compresses the gaseous refrigerant, which now flows under high pressure through the solenoid valve 1 to the outdoor heat exchanger 10.
  • the refrigerant releases heat to the ambient air and is thereby liquefied.
  • the outdoor heat exchanger is a "condenser" in this mode.
  • the refrigerant flows through the collector 9 and via the solenoid valve 5 to the expansion valve 7.
  • the expansion valve 7 drops the pressure abruptly, which not only results in cooling of the refrigerant, it also begins to evaporate.
  • the refrigerant absorbs heat from the room air until it is completely evaporated.
  • the indoor heat exchanger is in this mode an "evaporator".
  • valves 2, 4 and 6 In heating mode, the valves 2, 4 and 6 remain open by the use of electromagnets. The valves 1, 3 and 5 are closed.
  • the compressor 12 compresses the gaseous refrigerant, which now flows under high pressure through the solenoid valve 4 to the inner heat exchanger 11.
  • the refrigerant releases heat to the room air and is thereby liquefied.
  • the indoor heat exchanger is a "condenser" in this mode.
  • the refrigerant flows through the collector 9 via the solenoid valve 6 to the expansion valve eighth
  • the expansion valve 8 abruptly lowers the pressure, which not only causes the refrigerant to cool, it also starts to evaporate.
  • the refrigerant absorbs heat from the ambient air until it is completely evaporated.
  • the outdoor heat exchanger is an "evaporator" in this mode.
  • the compressor 12 Both in heating mode and in cooling mode, the compressor 12 always sucks pure gaseous refrigerant from the respective evaporator.
  • the functions of the heat exchangers 10, 11 change, the evaporator becomes the condenser and vice versa.
  • the problem with the mode change results from the fact that the compressor 12 sucks after the change from that heat exchanger 10, 11, which previously worked as a condenser. In the condenser is partly liquid coolant, which, if it would get in this state to the compressor 12, this would destroy.
  • a pressure compensation is therefore carried out during operation change. First, the compressor 12 is stopped and all solenoid valves 1-6 are closed.
  • valves 2 and 3 are closed again. Thereafter, the valves for the desired state are reopened (1, 3, 5 for cooling operation, 2, 4, 6 for heating operation) and the compressor 12 is started.
  • the term "valves” used above is not to be understood in the strict sense. Rather, it should be recorded all Absperrorgange that meet the intended purpose. The control of the "valves" is carried out according to the specifications of the present invention issued device-internal control.

Abstract

Bei einem Verfahren zum Steuern einer Klimaanlage mit Wärmepumpenfunktion weist die Anlage einen Innenwärmetauscher (11) und einen Außenwärmetauscher (10) sowie einen Verdichter (12) auf und es sind Ventile (1 bis 6) angeordnet, welche den Kreislauf eines Kältemittels derart steuern, dass bei einer Betriebsart der Innenwärmetauscher (11) als Verdampfer, bei der anderen Betriebsart als Verflüssiger arbeitet. Beim Betriebsartenwechsel wird ein Druckausgleich durchgeführt, indem der Verdichter (12) angehalten und der Innen- (11) und der Außenwärmetauscher (10) durch Schaltung der Ventile (1 bis 6) direkt verbunden werden, worauf nach Eintritt eines Druck- und Temperaturausgleiches zwischen Innen- (11) und Außenwärmetauscher (10) die Ventile (1 bis 6) in die der gewünschten Betriebsart entsprechenden Stellung gebracht werden und der Verdichter (12) in Gang gesetzt wird. Dadurch ist kein Flüssigkeitsabscheider notwendig.In a method of controlling a heat pump-type air conditioning system, the system comprises an indoor heat exchanger (11) and an outdoor heat exchanger (10) and a compressor (12), and valves (1 to 6) are provided which control the circulation of a refrigerant such that in one mode, the indoor heat exchanger (11) as an evaporator, works in the other mode than condenser. When changing operating mode, a pressure equalization is performed by the compressor (12) stopped and the inner (11) and the outdoor heat exchanger (10) by switching the valves (1 to 6) are directly connected, after which a pressure and temperature compensation between the inside - (11) and outdoor heat exchanger (10) the valves (1 to 6) are brought into the desired operating mode corresponding position and the compressor (12) is set in motion. As a result, no liquid separator is necessary.

Description

Die Erfindung bezieht sich auf ein Verfahren zum Steuern einer Klimaanlage mit Wärmepumpenfunktion, wobei die Anlage einen Innenwärmetauscher und einen Außenwärmetauscher sowie einen Verdichter aufweist und Ventile angeordnet sind, welche den Kreislauf eines Kältemittels derart steuern, dass bei einer Betriebsart der Innenwärmetauscher als Verdampfer, bei der anderen Betriebsart als Verflüssiger arbeitet.The invention relates to a method for controlling an air conditioning system with heat pump function, wherein the system comprises an indoor heat exchanger and an outdoor heat exchanger and a compressor and valves are arranged, which control the circulation of a refrigerant such that in one mode of operation of the indoor heat exchanger as the evaporator, in the operating mode other than condenser works.

Ferner ist Gegerlstand der Erfindung eine Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens.In addition, the invention is a device for carrying out the method according to the invention.

Verdichter in Klimageräten und Wärmepumpen können ausschließlich gasförmiges Kältemittel verdichten, sie gehen bei Ansaugung von flüssigen Anteilen kaputt. Bei bekannten Anlagen wird zum Schutz des Kompressors ein Flüssigkeitsabscheider in den Kältekreislauf mit eingebaut um sicher zu stellen, dass keine flüssigen Anteile vom Kompressor angesaugt werden. Die notwendige Anordnung eines Flüssigkeitsabscheiders verteuert die bekannten Anlagen und erfordert auch eine aufwendige Konstruktion.Compressors in air conditioners and heat pumps can only compress gaseous refrigerant, they break down when aspirating liquid fractions. In known systems, a liquid separator is installed in the refrigeration circuit to protect the compressor with to make sure that no liquid components are sucked by the compressor. The necessary arrangement of a liquid separator increases the cost of the known systems and also requires a complex construction.

Die Erfindung hat es sich zum Ziel gesetzt, ein Verfahren der eingangs genannten Art zu schaffen, bei dessen Anwendung kein Flüssigkeitsabscheider erforderlich ist.The invention has set itself the goal of providing a method of the type mentioned in the application no liquid separator is required.

Dieses Verfahren zeichnet sich dadurch aus, dass beim Betriebsartenwechsel ein Druckausgleich durchgeführt wird, indem der Verdichter angehalten und der Innen- und der Außenwärmetauscher durch Schaltung der Ventile direkt verbunden werden, worauf nach Eintritt eines Druck- und Temperaturausgleiches zwischen Innen- und Außenwärmetauscher die Ventile in die der gewünschten Betriebsart entsprechenden Stellung gebracht werden und der Verdichter in Gang gesetzt wird.This method is characterized in that the mode change pressure equalization is performed by the compressor stopped and the inner and the outer heat exchanger are connected by switching the valves directly, whereupon the pressure in the valves and in-between heat exchanger after entering a pressure and temperature compensation the desired operating mode corresponding position are brought and the compressor is set in motion.

Eine Vorrichtung zur Durchführung des Verfahrens nach der Erfindung zeichnet sich dadurch aus, dass dem Verdichter zwei Ventile vorgeschaltet und zwei Ventile nachgeschaltet sind, wobei abhängig von der Betriebsart eines der Ventile an den Außenwärmetauscher, das andere an den Innenwärmetauscher schaltbar ist.An apparatus for carrying out the method according to the invention is characterized in that the compressor upstream of two valves and two valves downstream, depending on the mode of operation of one of the valves to the outdoor heat exchanger, the other is switchable to the indoor heat exchanger.

Nachstehend ist die Erfindung anhand der Zeichnungen näher beschrieben, ohne auf diese Beispiele beschränkt zu sein. Dabei zeigen:

  • Figur 1 das Schaltbild einer erfindungsgemäßen Anlage beim Betrieb als Klimaanlage;
  • Figur 2 das Schaltbild einer erfindungsgemäßen Anlage beim Betrieb als Wärmepumpe;
  • Figur 3 das Schaltbild der erfindungsgemäßen Anlage im Zustand des Druckausgleiches.
The invention will be described in more detail below with reference to the drawings, without being limited to these examples. Showing:
  • FIG. 1 the diagram of a system according to the invention when operating as air conditioning;
  • FIG. 2 the diagram of a system according to the invention when operating as a heat pump;
  • FIG. 3 the diagram of the system according to the invention in the state of pressure equalization.

In allen Figuren ist durch Punkte der gasförmige Zustand, durch Wellen der flüssige Zustand des Kältemittels in den jeweiligen Bereichen angedeutet.In all figures, the gaseous state is indicated by dots, and the liquid state of the refrigerant in the respective regions is indicated by waves.

Auch werden in allen Figuren die gleichen Bezugszeichen verwendet:

  • 1 bis 6 elektromagnetisch betätigte Ventile;
  • 7, 8 Expansionsventile mit integriertem Rückschlagventil;
  • 9 Sammler;
  • 10 Außenwärmetauscher;
  • 11 Innenwärmetauscher;
  • 12 Verdichter.
Also, the same reference numerals are used in all figures:
  • 1 to 6 electromagnetically actuated valves;
  • 7, 8 expansion valves with integrated non-return valve;
  • 9 collectors;
  • 10 outdoor heat exchangers;
  • 11 indoor heat exchanger;
  • 12 compressors.

Bei Kühlbetrieb nach Fig. 1 bleiben die Ventile 1, 3 und 5 durch den Einsatz von Elektromagneten geöffnet. Die Ventile 2, 4 und 6 sind geschlossen.In cooling mode after Fig. 1 remain the valves 1, 3 and 5 opened by the use of electromagnets. The valves 2, 4 and 6 are closed.

Der Verdichter 12 komprimiert das gasförmige Kältemittel, das nun unter hohem Druck durch das Magnetventil 1 zum Außenwärmetauscher 10 strömt.The compressor 12 compresses the gaseous refrigerant, which now flows under high pressure through the solenoid valve 1 to the outdoor heat exchanger 10.

Im Außenwärmetauscher 10 gibt das Kältemittel Wärme an die Umgebungsluft ab und wird dadurch verflüssigt. Der Außenwärmetauscher ist in dieser Betriebsart ein "Verflüssiger".In the outdoor heat exchanger 10, the refrigerant releases heat to the ambient air and is thereby liquefied. The outdoor heat exchanger is a "condenser" in this mode.

Im flüssigen und weiter unter hohem Druck stehenden Zustand fließt das Kältemittel durch den Sammler 9 und über das Magnetventil 5 zum Expansionsventil 7.In the liquid state, which is still under high pressure, the refrigerant flows through the collector 9 and via the solenoid valve 5 to the expansion valve 7.

Das Expansionsventil 7 senkt den Druck schlagartig ab, was nicht nur ein Abkühlen des Kältemittels zur Folge hat, es beginnt außerdem zu verdampfen. Im Innenwärmetauscher 11 nimmt das Kältemittel Wärme aus der Raumluft auf, bis es vollständig verdampft ist. Der Innenwärmetauscher ist in dieser Betriebsart ein "Verdampfer".The expansion valve 7 drops the pressure abruptly, which not only results in cooling of the refrigerant, it also begins to evaporate. In the indoor heat exchanger 11, the refrigerant absorbs heat from the room air until it is completely evaporated. The indoor heat exchanger is in this mode an "evaporator".

Das nunmehr wieder gasförmige Kältemittel wird vom Verdichter 12 über das Magnetventil 3 angesaugt und erneut komprimiert. Der Kreislauf beginnt von vorne.The now again gaseous refrigerant is sucked in by the compressor 12 via the solenoid valve 3 and compressed again. The cycle starts from the beginning.

Im Heizbetrieb bleiben die Ventile 2, 4 und 6 durch den Einsatz von Elektromagneten geöffnet. Die Ventile 1, 3 und 5 sind geschlossen.In heating mode, the valves 2, 4 and 6 remain open by the use of electromagnets. The valves 1, 3 and 5 are closed.

Der Verdichter 12 komprimiert das gasförmige Kältemittel, das nun unter hohem Druck durch das Magnetventil 4 zum Innenwärmetauscher 11 strömt.The compressor 12 compresses the gaseous refrigerant, which now flows under high pressure through the solenoid valve 4 to the inner heat exchanger 11.

Im Innenwärmetauscher 11 gibt das Kältemittel Wärme an die Raumluft ab und wird dadurch verflüssigt. Der Innenwärmetauscher ist in dieser Betriebsart ein "Verflüssiger".In the indoor heat exchanger 11, the refrigerant releases heat to the room air and is thereby liquefied. The indoor heat exchanger is a "condenser" in this mode.

Im flüssigen und weiter unter hohem Druck stehendem Zustand fließt das Kältemittel durch den Sammler 9 über das Magnetventil 6 zum Expansionsventil 8.In the liquid and further high pressure state, the refrigerant flows through the collector 9 via the solenoid valve 6 to the expansion valve eighth

Das Expansionsventil 8 senkt den Druck schlagartig ab, was nicht nur ein Abkühlen des Kältemittels zur Folge hat, es beginnt außerdem zu verdampfen. Im Außenwärmetauscher 10 nimmt das Kältemittel Wärme aus der Umgebungsluft auf, bis es vollständig verdampft ist. Der Außenwärmetauscher ist in dieser Betriebsart ein "Verdampfer".The expansion valve 8 abruptly lowers the pressure, which not only causes the refrigerant to cool, it also starts to evaporate. In the outdoor heat exchanger 10, the refrigerant absorbs heat from the ambient air until it is completely evaporated. The outdoor heat exchanger is an "evaporator" in this mode.

Das nunmehr wieder gasförmige Kältemittel wird vom Verdichter 12 über das Magnetventil 2 angesaugt und erneut komprimiert. Der Kreislauf beginnt von vorne.The now again gaseous refrigerant is sucked in by the compressor 12 via the solenoid valve 2 and compressed again. The cycle starts from the beginning.

Sowohl im Heizbetrieb als auch im Kühlbetrieb saugt der Verdichter 12 immer rein gasförmiges Kältemittel aus dem jeweiligen Verdampfer an. Beim Wechsel der Betriebsarten ändern sich die Funktionen der Wärmetauscher 10, 11, der Verdampfer wird zum Verflüssiger und umgekehrt. Das Problem beim Betriebsartenwechsel ergibt sich daraus, dass der Verdichter 12 nach dem Wechsel aus jenem Wärmetauscher 10, 11 ansaugt, der zuvor noch als Verflüssiger gearbeitet hat. Im Verflüssiger befindet sich zum Teil flüssiges Kühlmittel, das, wenn es in diesem Zustand zum Verdichter 12 gelangen würde, diesen zerstören würde.Both in heating mode and in cooling mode, the compressor 12 always sucks pure gaseous refrigerant from the respective evaporator. When changing the operating modes, the functions of the heat exchangers 10, 11 change, the evaporator becomes the condenser and vice versa. The problem with the mode change results from the fact that the compressor 12 sucks after the change from that heat exchanger 10, 11, which previously worked as a condenser. In the condenser is partly liquid coolant, which, if it would get in this state to the compressor 12, this would destroy.

Es muss also sichergestellt werden, dass keine flüssigen Anteile aus dem Wärmetauscher mit angesaugt werden.It must therefore be ensured that no liquid components are sucked from the heat exchanger with.

Erfindungsgemäß wird daher beim Betriebswechsel ein Druckausgleich durchgeführt. Es werden zunächst der Verdichter 12 angehalten und alle Magnetventile 1-6 geschlossen.According to the invention, a pressure compensation is therefore carried out during operation change. First, the compressor 12 is stopped and all solenoid valves 1-6 are closed.

Danach werden der Außen- 10 und der Innenwärmetauscher 11 direkt verbunden. Das geschieht, indem nur die Magnetventile 2 und 3 geöffnet werden.Thereafter, the outdoor 10 and the indoor heat exchanger 11 are connected directly. This is done by opening only the solenoid valves 2 and 3.

Es kommt zwischen dem zuvor unter hohem Druck stehenden und heißen Verflüssiger und dem unter niedrigem Druck stehenden und kalten Verdampfer zum Druck- und Temperaturausgleich. Die Bauteile und Rohre der Anlage müssen so dimensioniert sein, dass sich das Kältemittel nach vollständigem Ausgleich auf einem Temperatur-DruckNiveau befindet, in dem es vollständig gasförmig austritt.It comes between the previously high-pressure and hot condenser and the low-pressure and cold evaporator for pressure and temperature compensation. The components and pipes of the system must be dimensioned so that the refrigerant, after complete compensation, is at a temperature-pressure level in which it exits completely gaseous.

Nachdem dieser Zustand eingetreten ist, werden die Ventile 2 und 3 wieder geschlossen. Danach werden die Ventile für den gewünschten Zustand wieder geöffnet (1, 3, 5 für Kühlbetrieb, 2, 4, 6 für Heizbetrieb) und der Verdichter 12 wird gestartet. Der vorstehend verwendete Begriff "Ventile" ist nicht im engen Sinne zu verstehen. Vielmehr sollen dadurch alle Absperrorgange erfasst werden, die den angestrebten Zweck erfüllen. Die Ansteuerung der "Ventile" erfolgt nach den Vorgaben der erfindungsgemäß ausgegebenen geräteinternen Steuerung.After this state has occurred, the valves 2 and 3 are closed again. Thereafter, the valves for the desired state are reopened (1, 3, 5 for cooling operation, 2, 4, 6 for heating operation) and the compressor 12 is started. The term "valves" used above is not to be understood in the strict sense. Rather, it should be recorded all Absperrorgange that meet the intended purpose. The control of the "valves" is carried out according to the specifications of the present invention issued device-internal control.

Claims (2)

Verfahren zum Steuern einer Klimaanlage mit Wärmepumpenfunktion, wobei die Anlage einen Innenwärmetauscher (11) und einen Außenwärmetauscher (10) sowie einen Verdichter (12) aufweist und Ventile (1 bis 6) angeordnet sind, welche den Kreislauf eines Kältemittels derart steuern, dass bei einer Betriebsart der Innenwärmetauscher (11) als Verdampfer, bei der anderen Betriebsart als Verflüssiger arbeitet, dadurch gekennzeichnet, dass beim Betriebsartenwechsel ein Druckausgleich durchgeführt wird, indem der Verdichter (12) angehalten und der Innen- (11) und der Außenwärmetauscher (10) durch Schaltung der Ventile (1 bis 6) direkt verbunden werden, worauf nach Eintritt eines Druck- und Temperaturausgleiches zwischen Innen-(11) und Außenwärmetauscher (10) die Ventile (1 bis 6) in die der gewünschten Betriebsart entsprechenden Stellung gebracht werden und der Verdichter (12) in Gang gesetzt wird.A method of controlling an air conditioning system with a heat pump function, said system comprising an indoor heat exchanger (11) and an outdoor heat exchanger (10) and a compressor (12) and valves (1 to 6) are arranged, which control the circulation of a refrigerant such that in a Operating mode of the indoor heat exchanger (11) as an evaporator, operates in the other operating mode as a condenser, characterized in that the mode change pressure equalization is performed by the compressor (12) stopped and the inner (11) and the outdoor heat exchanger (10) by switching the valves (1 to 6) are directly connected, whereupon, after pressure and temperature equalization have occurred between the inner (11) and outer heat exchanger (10), the valves (1 to 6) are brought into the position corresponding to the desired operating mode and the compressor ( 12) is set in motion. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, dass dem Verdichter (12) zwei Ventile (2, 3) vorgeschaltet und zwei Ventile (1, 4) nachgeschaltet sind, wobei abhängig von der Betriebsart eines (1,2) der Ventile (1, 2, 3, 4) an den Außenwärmetauscher (10), das andere (3, 4) an den Innenwärmetauscher (11) schaltbar ist.Apparatus for carrying out the method according to claim 1, characterized in that the compressor (12) two valves (2, 3) upstream and two valves (1, 4) are connected downstream, wherein depending on the operating mode of one (1,2) of the valves (1, 2, 3, 4) to the outdoor heat exchanger (10), the other (3, 4) to the indoor heat exchanger (11) is switchable.
EP14450040.2A 2013-08-29 2014-08-21 Method for controlling an air conditioning system and apparatus for carrying out the method Withdrawn EP2853842A1 (en)

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ATA669/2013A AT513855B1 (en) 2013-08-29 2013-08-29 Method of controlling an air conditioner

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