WO2020048665A1 - Air-conditioning servicing appliance, and method for filling a vehicle air-conditioning system - Google Patents

Air-conditioning servicing appliance, and method for filling a vehicle air-conditioning system Download PDF

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Publication number
WO2020048665A1
WO2020048665A1 PCT/EP2019/068563 EP2019068563W WO2020048665A1 WO 2020048665 A1 WO2020048665 A1 WO 2020048665A1 EP 2019068563 W EP2019068563 W EP 2019068563W WO 2020048665 A1 WO2020048665 A1 WO 2020048665A1
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WO
WIPO (PCT)
Prior art keywords
line
coolant
air conditioning
connection
gas
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PCT/EP2019/068563
Other languages
German (de)
French (fr)
Inventor
Matteo MORA
Valerio DOINO
Matteo MERLI
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Robert Bosch Gmbh
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Publication of WO2020048665A1 publication Critical patent/WO2020048665A1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B45/00Arrangements for charging or discharging refrigerant
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2345/00Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/001Charging refrigerant to a cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2345/00Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/007Details for charging or discharging refrigerants; Service stations therefor characterised by the weighing of refrigerant or oil

Definitions

  • the invention relates to an air conditioning service device for filling a vehicle air conditioning system and a method for filling a vehicle air conditioning system according to the preamble of the independent claims.
  • Such an air conditioning service device is known from US 16/111936.
  • An air conditioning service device is used to fill a coolant into a vehicle air conditioner.
  • the amount of coolant that enters the vehicle air conditioning system must be determined as precisely as possible.
  • a desired filling quantity is normally entered into a controller of the air conditioning service device.
  • the weight of the coolant tank is also weighed. Due to a pressure difference, the coolant flows out of the coolant tank and the vehicle air conditioning system via a line system.
  • valves located in the piping system must be opened to start the filling process.
  • the amount of coolant that has entered the vehicle air conditioner is determined based on the change in the weight of the coolant tank. As soon as the desired amount of coolant has entered the vehicle air conditioning system, the valves are closed so that the filling process is ended.
  • the invention has for its object to provide an air conditioning service device for filling a vehicle air conditioning system and a method for filling a vehicle air conditioning system, which enables a more accurate determination of the amount of coolant that has entered the vehicle air conditioning system. Disclosure of the Invention Advantages of the Invention
  • the air conditioning service device according to the invention for filling a vehicle air conditioning system and the method according to the invention for filling a vehicle air conditioning system with the features according to the independent claim have the advantage that the amount of coolant that gets into the vehicle air conditioning system can be determined more precisely. This is achieved by the remaining amount of coolant in the line system of the air conditioning service device can be determined more accurately than before. After the second filling period, there is only coolant in the gaseous phase in the pipe system and not, as before, portions of coolant in the liquid and gaseous phase.
  • the amount of coolant in the pipe system must be taken into account when determining how much coolant has got into the vehicle air conditioning system. Since both components of coolant can be present in the liquid and gaseous phases due to heat input and pressure fluctuations in the line system, an exact quantity determination is not possible due to the unknown proportions of the coolant in the liquid and gaseous phase.
  • the proposed invention can ensure that there is only coolant in the gaseous phase in the line system of the air conditioning service device, so that a quantity determination is easier and more precise due to the uniform medium in the line system.
  • the gas connection is arranged in the upper region of the coolant tank, since in this way primarily coolant in the gaseous phase can get into the gas line.
  • An arrangement of the fluid connection in the lower region of the coolant tank is advantageous, since in this way it can be ensured that mainly coolant in the liquid phase can get from the coolant tank into the removal line via the removal line.
  • connection between the gas line and the intermediate line is arranged between the switchable valve and the branch point, since in this way the line system can be filled almost completely with coolant in the gaseous phase.
  • a further advantage is obtained if a further switchable valve is arranged in the gas line, since this can prevent coolant from getting into the line system via the gas line during the first filling period.
  • the gas line is connected to the branch line via the switchable valve, whereby either the connection between the gas line and the intermediate line is released via the switchable valve, or the connection between the sampling line and Intermediate line is released, the other connection being closed.
  • the line system of the air conditioning service device is filled with coolant in the gaseous phase in the second filling period, since in this way the amount of coolant in the line system can be determined more precisely than if both coolant in the liquid and gaseous phase are present in the line system is because their proportions can hardly be determined.
  • FIG. 1 shows an air conditioning service device for filling a vehicle air conditioning system in a schematic representation according to the prior art
  • FIG. 2 shows a vehicle air conditioning system in a schematic illustration
  • FIG. 3 shows an air conditioning service device for filling a vehicle air conditioning system in a schematic representation according to a first exemplary embodiment
  • FIG. 4 shows an air conditioning service device for filling a vehicle air conditioning system in a schematic representation according to a second exemplary embodiment
  • Figure 5 is a flowchart of the method for filling a vehicle air conditioner.
  • FIG. 1 shows an air conditioning service device 1 for filling a vehicle air conditioning system 100 in a schematic illustration according to the prior art.
  • the air conditioning service device 1 has a coolant tank 12 which contains a coolant.
  • the coolant is used to fill a previously emptied vehicle air conditioning system 100.
  • the coolant is primarily due to the temperature and pressure conditions in the coolant tank 12 in the liquid phase, but above the liquid phase an area is formed in which the coolant is in the gaseous phase .
  • the coolant in the liquid phase passes through a fluid connection 4 into an extraction line 14.
  • the fluid connection 4 can be arranged in the lower region of the coolant tank 12, since it can be ensured in this way that primarily coolant in the liquid phase gets into the extraction line 14.
  • the extraction line 14 is connected to an intermediate line 16, which has a switchable valve 6 and is connected via a branching point 18 to at least one service line 20, 30.
  • an intermediate line 16 which has a switchable valve 6 and is connected via a branching point 18 to at least one service line 20, 30.
  • the respective service line 20, 30 can be closed and opened by the control valve 31, 21, so that the vehicle air conditioning system 100 is filled via the high-pressure service line 30 and / or the low-pressure service line 20.
  • the at least one service line 20, 30 has a connection 8, 10 via which the air conditioning service device 1 is connected to the vehicle air conditioning device 100.
  • the high-pressure service line 30 has a high-pressure connection 8
  • the low-pressure service line 20 has a low-pressure connection 10.
  • the two connections 8, 10 of the air conditioning service device 1 can be connected to corresponding AC connections 108, 110 of the vehicle air conditioning system 100, as shown in FIG. 2.
  • the air conditioning service device 1 has a scale 40 which can determine the weight of the coolant tank 12. On the basis of the changes in the weight of the coolant tank 12, the amount of coolant in the coolant tank 12 is determined or the amount of coolant in which the vehicle air conditioning system 100 was filled.
  • a vehicle air conditioning system 100 is shown in a highly simplified illustration in FIG.
  • the vehicle air conditioning system 100 is designed as a closed circuit.
  • the liquid refrigerant under high pressure is expanded through an expansion valve 204 into a room with lower pressure.
  • the liquid refrigerant then passed into an evaporator 208, in which it expands and the state of matter changes to the gaseous phase.
  • the heat in the evaporator required for the evaporation process of the refrigerant is extracted from the air flowing past and cools it down.
  • the cooled air is conducted via an outflow device into the vehicle interior.
  • the refrigerant which has become gaseous as a result of the evaporation in the evaporator is now passed on to the compressor 210. This also takes care of the transport of the refrigerant in the system.
  • the compressor which is usually driven by the vehicle engine by means of a belt drive, sucks in the gaseous refrigerant and compresses it strongly, causing the temperature of the refrigerant to rise.
  • the compressed, gaseous and hot refrigerant in the gaseous phase is then cooled in a downstream condenser 202.
  • the dew point of the refrigerant is undershot so that it liquefies again.
  • the additional heat of condensation is given off to the outside air, usually similar to the engine cooler.
  • the refrigerant in the liquid phase now returns to the expansion valve 204.
  • the cycle of evaporation and compression closes.
  • FIG. 3 shows the proposed air conditioning service device 1 for filling a vehicle air conditioning system 100 in a schematic illustration according to a first exemplary embodiment.
  • the proposed air conditioning service device 1 for filling a vehicle air conditioning system 100 has, in addition to the components already described in FIG. 1, a gas line 15 which is connected via a gas connection 5 to the coolant tank 12 and to the intermediate line 16. Coolants can flow from the coolant tank 12 into the intermediate line 16 via the gas line 15. It is only possible to remove coolants from the coolant tank via the gas line 16, while coolants from the vehicle air conditioning system 100 cannot flow into the coolant tank 12 via the gas line 15.
  • the gas connection 25 can be arranged in the upper region of the coolant tank 12, since in this region there is mainly coolant in the gaseous phase, which has not been condensed.
  • the coolant tank 12 can also comprise a plurality of separate coolant tanks, the gas connection 25 in this Case is then connected to a coolant tank in which there is primarily coolant in the gaseous phase.
  • a fluidic connection between the gas line 15 and the intermediate line 16 can exist between the switchable valve 6 and the branching point 18.
  • the connection between the gas line 15 and the intermediate line 16 should be arranged as close as possible to the switchable valve 6, so that the coolant in the gaseous phase has the greatest possible proportion of coolant in the liquid phase from the line system, consisting of the intermediate line 16 and at least one service line 20, 30 ousted.
  • a further switchable valve 25 can be arranged in the gas line 15.
  • coolant in the liquid phase it is possible for coolant in the liquid phase to flow from the coolant tank 12 to the vehicle air conditioning system 100 in the liquid phase during a first filling period, while coolant in the gaseous phase flows from the coolant tank via the gas connection 5 in a second filling period 12 one flows to the vehicle air conditioner 100.
  • the switchable valve 6 is open, so that there is a connection between the extraction line 14 and the intermediate line 16, while the further switchable valve 25 is closed, so that no coolant can flow through the gas line 15.
  • the switchable valve 6 is closed, so that there is no connection between the extraction line 14 and the intermediate line 16, while the further switchable valve 25 is open, so that coolant can flow through the gas line 15 in the gaseous phase.
  • the line system 16, 20, 30 of the air conditioning service device 1 is filled with coolant in the gaseous phase, in that any components of coolant still present in the liquid phase are removed from the line system 16, 20, 30 in by the coolant in the gaseous phase the vehicle air conditioner 100 are displaced.
  • the second filling period is ended when the line system 16, 20, 30 is completely filled with coolant in the gaseous phase.
  • FIG. 4 shows an air conditioning service device 1 for filling a vehicle air conditioning system 100 in a schematic illustration according to a second exemplary embodiment.
  • the gas line 15 is connected here via the switchable valves 6 to the branching line 16, wherein either the connection between the gas line 15 and the intermediate line 16 is released via the switchable valves 6 or the connection between the extraction line 14 and the intermediate line 16 is released, the each other connection is closed.
  • FIG. 5 shows a flowchart diagram of the method for filling an air conditioning system 100.
  • the coolant is passed via a fluid connection 4 and a removal line 14 from the coolant tank 12 of an air conditioning service device 1 to the vehicle air conditioning system 100.
  • the coolant is removed via a gas connection 5 and a gas line 15
  • Coolant tank 12 of an air conditioning service device 1 to the vehicle air conditioning system 100 passes.

Abstract

An air-conditioning servicing appliance (1) for filling a vehicle air-conditioning system (100), having: a coolant tank (12); an extraction line (14) which is connected via a fluid connector (4) to the coolant tank (12); an intermediate line (16), the intermediate line (16) having a switchable valve (6) and being connected via a branching point (18) to at least one servicing line (20, 30). A gas line (15) is connected via a gas connector (25) to the coolant tank (12) and to the intermediate line (16), by means of which gas line (15) coolant can flow from the coolant tank (12) into the intermediate line (16).

Description

Beschreibung  description
Titel title
Klimaservicegerät und Verfahren zum Befüllen einer Fahrzeugklimaanlage  Air conditioning service device and method for filling a vehicle air conditioning system
Stand der Technik State of the art
Die Erfindung betrifft eine Klimaservicegerät zum Befüllen einer Fahrzeugklima anlage und ein Verfahren zum Befüllen einer Fahrzeugklimaanlage nach dem Oberbegriff der unabhängigen Ansprüche. The invention relates to an air conditioning service device for filling a vehicle air conditioning system and a method for filling a vehicle air conditioning system according to the preamble of the independent claims.
Eine solches Klimaservicegerät ist aus der Schrift US 16/111936 bekannt. Ein Klimaservicegerät wird benutzt um ein Kühlmittel in eine Fahrzeugklimaanlage zu füllen. Hierbei muss die Menge an Kühlmittel, welche in die Fahrzeugklimaanlage gelangt möglichst exakt bestimmt werden. Such an air conditioning service device is known from US 16/111936. An air conditioning service device is used to fill a coolant into a vehicle air conditioner. The amount of coolant that enters the vehicle air conditioning system must be determined as precisely as possible.
Zu Beginn des Befüllvorgangs wird normalerweise eine angestrebte Befüllmenge in einen Kontroller des Klimaservicegerätes eingegeben. Des Weiteren wird das Gewicht des Kühlmitteltanks gewogen. Das Kühlmittel fließt aufgrund einer Druckdifferenz über ein Leitungssystem aus dem Kühlmitteltank und die Fahr zeugklimaanlage. Hierzu müssen Ventile, welche sich im Leitungssystem befin den, geöffnet werden, um den Befüllvorgang zu starten. Die Menge an Kühlmit tel, welche in die Fahrzeugklimaanlage gelangt ist, wird anhand der Veränderung des Gewichtes des Kühlmitteltanks bestimmt. Sobald die gewünschte Menge an Kühlmittel in die Fahrzeugklimaanlage gelangt ist, werden die Ventile geschlos sen, so dass der Befüllvorgang beendet wird. At the beginning of the filling process, a desired filling quantity is normally entered into a controller of the air conditioning service device. The weight of the coolant tank is also weighed. Due to a pressure difference, the coolant flows out of the coolant tank and the vehicle air conditioning system via a line system. For this purpose, valves located in the piping system must be opened to start the filling process. The amount of coolant that has entered the vehicle air conditioner is determined based on the change in the weight of the coolant tank. As soon as the desired amount of coolant has entered the vehicle air conditioning system, the valves are closed so that the filling process is ended.
Der Erfindung liegt die Aufgabe zugrunde, ein Klimaservicegerät zum Befüllen einer Fahrzeugklimaanlage und ein Verfahren zum Befüllen einer Fahrzeugklima anlage anzugeben, das eine genauere Bestimmung der Menge an Kühlmittel, die in die Fahrzeugklimaanlage gelangt ist, ermöglicht. Offenbarung der Erfindung Vorteile der Erfindung The invention has for its object to provide an air conditioning service device for filling a vehicle air conditioning system and a method for filling a vehicle air conditioning system, which enables a more accurate determination of the amount of coolant that has entered the vehicle air conditioning system. Disclosure of the Invention Advantages of the Invention
Das erfindungsgemäße Klimaservicegerät zum Befüllen einer Fahrzeugklimaan lage und das erfindungsgemäße Verfahren zum Befüllen einer Fahrzeugklimaan lage mit den Merkmalen gemäß der unabhängigen Anspruch haben den Vorteil, dass die Menge an Kühlmittel, welche in die Fahrzeugklimaanlage gelangt, ge nauer bestimmt werden kann. Dies wird erreicht, indem die verbleibende Menge an Kühlmittel im Leitungssystem des Klimaservicegerätes genauer als bisher be stimmt werden kann. Im Leitungssystem befindet sich nach dem zweiten Befüll- zeitraum nur Kühlmittel in der gasförmigen Phase und nicht wie bisher Anteile von Kühlmittel in der flüssigen und gasförmigen Phase. The air conditioning service device according to the invention for filling a vehicle air conditioning system and the method according to the invention for filling a vehicle air conditioning system with the features according to the independent claim have the advantage that the amount of coolant that gets into the vehicle air conditioning system can be determined more precisely. This is achieved by the remaining amount of coolant in the line system of the air conditioning service device can be determined more accurately than before. After the second filling period, there is only coolant in the gaseous phase in the pipe system and not, as before, portions of coolant in the liquid and gaseous phase.
Die Menge des Kühlmittels im Leitungssystem muss berücksichtigt werden, wenn über die Waage bestimmt wird, wieviel Kühlmittel in die Fahrzeugklimaanlage ge langt ist. Da aufgrund von Wärmeeintrag und Druckschwankungen im Leitungs system sowohl Bestandteile von Kühlmittel in der flüssigen und gasförmigen Phase vorhanden sein können, ist eine exakte Mengenbestimmung aufgrund der unbekannten Anteile des Kühlmittels in der flüssigen und gasförmigen Phase nicht möglich. The amount of coolant in the pipe system must be taken into account when determining how much coolant has got into the vehicle air conditioning system. Since both components of coolant can be present in the liquid and gaseous phases due to heat input and pressure fluctuations in the line system, an exact quantity determination is not possible due to the unknown proportions of the coolant in the liquid and gaseous phase.
Durch die vorgeschlagene Erfindung kann sichergestellt werden, dass sich im Leitungssystem des Klimaservicegerätes nur noch Kühlmittel in der gasförmigen Phase befindet, so dass eine Mengenbestimmung aufgrund des einheitlichen Mediums im Leitungssystem einfacher und genauer wird. The proposed invention can ensure that there is only coolant in the gaseous phase in the line system of the air conditioning service device, so that a quantity determination is easier and more precise due to the uniform medium in the line system.
In den abhängigen Ansprüchen sind vorteilhafte Ausgestaltungen und Weiterbil dungen der erfindungsgemäßen Vorrichtung angegeben. In the dependent claims, advantageous refinements and developments of the device according to the invention are specified.
Es ist von Vorteil, wenn der Gasanschluss im oberen Bereich des Kühlmitteltanks angeordnet ist, da auf diese Weise vornehmlich Kühlmittel in der gasförmigen Phase in die Gasleitung gelangen kann. Eine Anordnung des Fluidanschluss im unteren Bereich des Kühlmitteltanks ist vorteilhaft, da auf diese auf diese Weise sichergestellt werden kann, dass über die Entnahmeleitung hauptsächlich Kühlmittel in der flüssigen Phase aus dem Kühlmitteltank in die Entnahmeleitung gelangen kann. It is advantageous if the gas connection is arranged in the upper region of the coolant tank, since in this way primarily coolant in the gaseous phase can get into the gas line. An arrangement of the fluid connection in the lower region of the coolant tank is advantageous, since in this way it can be ensured that mainly coolant in the liquid phase can get from the coolant tank into the removal line via the removal line.
Es ist von Vorteil, wenn die Verbindung zwischen Gasleitung und Zwischenleitung zwischen dem schaltbaren Ventil und dem Verzeigungspunkt angeordnet ist, da auf diese Weise das Leitungssystem fast vollständig mit Kühlmittel in der gasförmigen Phase befüllt werden kann. It is advantageous if the connection between the gas line and the intermediate line is arranged between the switchable valve and the branch point, since in this way the line system can be filled almost completely with coolant in the gaseous phase.
Ein weiterer Vorteil ergibt sich, wenn in der Gasleitung ein weiteres schaltbares Ventil angeordnet ist, da auf diese Weise verhindert werden kann, dass über die Gasleitung bereits während des ersten Befüllzeitraumes Kühlmittel in das Leitungssystem gelangen kann. A further advantage is obtained if a further switchable valve is arranged in the gas line, since this can prevent coolant from getting into the line system via the gas line during the first filling period.
Aufgrund der geringeren Anzahl an schaltbaren Ventilen und der damit verbundenen Kosteneinsparungen ist es von Vorteil, wenn die Gasleitung über das schaltbare Ventile mit der Verzweigungsleitung verbunden ist, wobei über das schaltbare Ventile entweder die Verbindung zwischen Gasleitung und Zwischenleitung freigegeben ist oder die Verbindung zwischen Entnahmeleitung und Zwischenleitung freigegeben ist, wobei die jeweils andere Verbindung geschlossen ist. Due to the smaller number of switchable valves and the associated cost savings, it is advantageous if the gas line is connected to the branch line via the switchable valve, whereby either the connection between the gas line and the intermediate line is released via the switchable valve, or the connection between the sampling line and Intermediate line is released, the other connection being closed.
Es ist von Vorteil, wenn im zweiten Befüllzeitraum das Leitungssystem des Klimaservicegerätes mit Kühlmittel in der gasförmigen Phase befüllt wird, da sich auf diese Weise die Menge an Kühlmittel im Leitungssystem genauer bestimmen lässt, als wenn sowohl Kühlmittel in der flüssigen und gasförmigen Phase im Leitungssystem vorhanden ist, da deren Anteile kaum zu bestimmen sind. It is advantageous if the line system of the air conditioning service device is filled with coolant in the gaseous phase in the second filling period, since in this way the amount of coolant in the line system can be determined more precisely than if both coolant in the liquid and gaseous phase are present in the line system is because their proportions can hardly be determined.
Ausführungsbeispiele Embodiments
Bevorzugte Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Preferred embodiments of the invention are shown in the drawing and explained in more detail in the following description.
Es zeigen: Figur 1 ein Klimaservicegerät zum Befüllen einer Fahrzeugklimaanlage in sche matischer Darstellung gemäß dem Stand der Technik, Show it: FIG. 1 shows an air conditioning service device for filling a vehicle air conditioning system in a schematic representation according to the prior art,
Figur 2 eine Fahrzeugklimaanlage in schematischer Darstellung, FIG. 2 shows a vehicle air conditioning system in a schematic illustration,
Figur 3 ein Klimaservicegerät zum Befüllen einer Fahrzeugklimaanlage in sche matischer Darstellung gemäß einem ersten Ausführungsbeispiel, FIG. 3 shows an air conditioning service device for filling a vehicle air conditioning system in a schematic representation according to a first exemplary embodiment,
Figur 4 ein Klimaservicegerät zum Befüllen einer Fahrzeugklimaanlage in sche matischer Darstellung gemäß einem zweiten Ausführungsbeispiel und FIG. 4 shows an air conditioning service device for filling a vehicle air conditioning system in a schematic representation according to a second exemplary embodiment and
Figur 5 ein Flussablaufdiagramm des Verfahrens zum Befüllen einer Fahrzeug klimaanlage. Figure 5 is a flowchart of the method for filling a vehicle air conditioner.
Ausführungsformen der Erfindung Embodiments of the invention
In der Figur 1 ist Klimaservicegerät 1 zum Befüllen einer Fahrzeugklimaanlage 100 in einer schematischen Darstellung nach dem Stand der Technik gezeigt.1 shows an air conditioning service device 1 for filling a vehicle air conditioning system 100 in a schematic illustration according to the prior art.
Das Klimaservicegerät 1 weist einen Kühlmitteltank 12 auf, welcher ein Kühlmittel enthält. Das Kühlmittel dient zur Befüllung einer vorher entleerten Fahrzeug klimaanlage 100. Das Kühlmittel liegt aufgrund der Temperatur und Druckverhält nisse im Kühlmitteltank 12 vornehmlich in der flüssigen Phase vor, jedoch bildet sich oberhalb der flüssigen Phase meinst ein Bereich in dem das Kühlmittel in der gasförmigen Phase vorliegt. Das Kühlmittel in der flüssigen Phase gelangt über einen Fluidanschluss 4 in eine Entnahmeleitung 14. The air conditioning service device 1 has a coolant tank 12 which contains a coolant. The coolant is used to fill a previously emptied vehicle air conditioning system 100. The coolant is primarily due to the temperature and pressure conditions in the coolant tank 12 in the liquid phase, but above the liquid phase an area is formed in which the coolant is in the gaseous phase . The coolant in the liquid phase passes through a fluid connection 4 into an extraction line 14.
Der Fluidanschluss 4 kann im unteren Bereich des Kühlmitteltanks 12 angeord net sein, da auf diese Weise sichergestellt werden kann, dass vornehmlich Kühl mittel in der flüssigen Phase in die Entnahmeleitung 14 gelangt. The fluid connection 4 can be arranged in the lower region of the coolant tank 12, since it can be ensured in this way that primarily coolant in the liquid phase gets into the extraction line 14.
Die Entnahmeleitung 14 ist mit einer Zwischenleitung 16 verbunden, welche ein schaltbares Ventil 6 aufweist und über einen Verzweigungspunkt 18 mit mindes tens einer Serviceleitung 20, 30 verbunden ist. Im Ausführungsbeispiel der Figur 1 ist eine Hochdruck-Serviceleitung 30 und eine Niederdruck-Serviceleitung 20 gezeigt, wobei beide Serviceleitung 20, 30 jeweils ein Rückschlagventil 22, 32 und jeweils ein Kontrollventil 31, 21 aufweisen können. Durch das Kontrollventil 31, 21 kann die jeweilige Serviceleitung 20, 30 geschlossen und geöffnet wer den, so dass die Fahrzeugklimaanlage 100 über die Hochdruck-Serviceleitung 30 und/oder die Niederdruck-Serviceleitung 20 befüllt wird. The extraction line 14 is connected to an intermediate line 16, which has a switchable valve 6 and is connected via a branching point 18 to at least one service line 20, 30. In the exemplary embodiment in FIG. 1, there is a high-pressure service line 30 and a low-pressure service line 20 shown, both service lines 20, 30 each having a check valve 22, 32 and a control valve 31, 21, respectively. The respective service line 20, 30 can be closed and opened by the control valve 31, 21, so that the vehicle air conditioning system 100 is filled via the high-pressure service line 30 and / or the low-pressure service line 20.
Die mindestens eine Serviceleitung 20, 30 weist einen Anschluss 8, 10 auf über den das Klimaservicegerät 1 mit dem Fahrzeugklimagerät 100 verbunden wird.The at least one service line 20, 30 has a connection 8, 10 via which the air conditioning service device 1 is connected to the vehicle air conditioning device 100.
Im dargestellten Ausführungsbeispiel weist die Hochdruck-Serviceleitung 30 ei nen Hochdruckanschluss 8 auf, während die Niederdruck-Serviceleitung 20 ei nen Niederdruckanschluss 10 aufweist. In the exemplary embodiment shown, the high-pressure service line 30 has a high-pressure connection 8, while the low-pressure service line 20 has a low-pressure connection 10.
Die beiden Anschlüsse 8, 10 des Klimaservicegerätes 1 können an korrespondie rende AC-Anschlüsse 108, 110 des Fahrzeugklimaanlage 100, wie in Figur 2 dargestellt, angeschlossen werden. The two connections 8, 10 of the air conditioning service device 1 can be connected to corresponding AC connections 108, 110 of the vehicle air conditioning system 100, as shown in FIG. 2.
Das Klimaservicegerät 1 weist eine Waage 40 auf, welche das Gewicht des Kühl mitteltanks 12 bestimmen kann. Anhand der Veränderungen des Gewichtes des Kühlmitteltanks 12, wird die Menge an Kühlmittel im Kühlmitteltank 12 bestimmt bzw. wird bestimmt mit welcher Menge an Kühlmittel das Fahrzeugklimaanlage 100 befüllt wurde. The air conditioning service device 1 has a scale 40 which can determine the weight of the coolant tank 12. On the basis of the changes in the weight of the coolant tank 12, the amount of coolant in the coolant tank 12 is determined or the amount of coolant in which the vehicle air conditioning system 100 was filled.
In Figur 2 ist eine Fahrzeugklimaanlage 100 in stark vereinfachter Darstellung gezeigt. Die Fahrzeugklimaanlage 100 ist als geschlossener Kreislauf ausgebil det. Das unter hohem Druck stehende flüssige Kältemittel wird durch ein Expan sionsventil 204 in einen Raum mit niedrigerem Druck entspannt. Danach gelang das flüssige Kältemittel in einen Verdampfer 208, in dem es sich ausdehnt und den Aggregatzustand zur gasförmigen Phase wechselt. A vehicle air conditioning system 100 is shown in a highly simplified illustration in FIG. The vehicle air conditioning system 100 is designed as a closed circuit. The liquid refrigerant under high pressure is expanded through an expansion valve 204 into a room with lower pressure. The liquid refrigerant then passed into an evaporator 208, in which it expands and the state of matter changes to the gaseous phase.
Die für den Verdampfungsprozess des Kältemittels notwendige Wärme im Ver dampfer wird der vorbeiströmenden Luft entzogen und kühlt diese ab. Die abge kühlte Luft wird über einen Ausströmeinrichtung in den Fahrzeuginnenraum ge leitet. Das durch die Verdampfung im Verdampfer gasförmig gewordene Kältemitel wird nun zum Kompressor 210 weitergeleitet. Dieser sorgt auch für den Trans port des Kältemitels im System. Der in der Regel vom Fahrzeugmotor durch Rie menantrieb angetriebene Kompressor saugt das gasförmige Kältemitel an und verdichtet es stark, dabei steigt die Temperatur des Kältemitels an. The heat in the evaporator required for the evaporation process of the refrigerant is extracted from the air flowing past and cools it down. The cooled air is conducted via an outflow device into the vehicle interior. The refrigerant which has become gaseous as a result of the evaporation in the evaporator is now passed on to the compressor 210. This also takes care of the transport of the refrigerant in the system. The compressor, which is usually driven by the vehicle engine by means of a belt drive, sucks in the gaseous refrigerant and compresses it strongly, causing the temperature of the refrigerant to rise.
Danach wird das komprimierte, gasförmige und heiße Kältemitel in gasförmiger Phase in einem nachgeschalteten Kondensator 202 abgekühlt. Dabei wird der Taupunkt des Kältemitels unterschriten, so dass sich dieses wieder verflüssigt. Die dabei zusätzlich entstehende Kondensationswärme wird an die Außenluft ab gegeben, üblicherweise ähnlich wie beim Motorkühler. Das Kältemitel in der flüs sigen Phase gelangt nun wieder zum Expansionsventil 204. So schließt sich der Kreislauf aus Verdampfung und Kompression. The compressed, gaseous and hot refrigerant in the gaseous phase is then cooled in a downstream condenser 202. The dew point of the refrigerant is undershot so that it liquefies again. The additional heat of condensation is given off to the outside air, usually similar to the engine cooler. The refrigerant in the liquid phase now returns to the expansion valve 204. The cycle of evaporation and compression closes.
Figur 3 zeigt das vorgeschlagene Klimaservicegerät 1 zum Befüllen einer Fahr zeugklimaanlage 100 in schematischer Darstellung gemäß einem ersten Ausfüh rungsbeispiel. FIG. 3 shows the proposed air conditioning service device 1 for filling a vehicle air conditioning system 100 in a schematic illustration according to a first exemplary embodiment.
Das vorgeschlagene Klimaservicegerät 1 zum Befüllen einer Fahrzeugklimaan lage 100 weist neben den bereits in der Figur 1 beschriebenen Komponenten eine Gasleitung 15 auf, welche über einen Gasanschluss 5 mit dem Kühlmitel tank 12 und mit der Zwischenleitung 16 verbunden ist. Über die Gasleitung 15 kann Kühlmitel aus dem Kühlmiteltank 12 in die Zwischenleitung 16 strömen. Es ist über die Gasleitung 16 nur eine Entnahme von Kühlmitel aus dem Kühlmitel tank möglich, während Kühlmitel aus der Fahrzeugklimaanlage 100 nicht über die Gasleitung 15 in den Kühlmiteltank 12 strömen kann. The proposed air conditioning service device 1 for filling a vehicle air conditioning system 100 has, in addition to the components already described in FIG. 1, a gas line 15 which is connected via a gas connection 5 to the coolant tank 12 and to the intermediate line 16. Coolants can flow from the coolant tank 12 into the intermediate line 16 via the gas line 15. It is only possible to remove coolants from the coolant tank via the gas line 16, while coolants from the vehicle air conditioning system 100 cannot flow into the coolant tank 12 via the gas line 15.
Der Gasanschluss 25 kann im oberen Bereich des Kühlmiteltanks 12 angeord net sein, da sich in diesem Bereich hauptsächlich Kühlmitel in der gasförmigen Phase befindet, welches nicht kondensiert wurde. The gas connection 25 can be arranged in the upper region of the coolant tank 12, since in this region there is mainly coolant in the gaseous phase, which has not been condensed.
Der Kühlmiteltank 12 kann in einer alternativen Ausführungsform auch mehrere separate Kühlmitelbehälter umfassen, wobei der Gasanschluss 25 in diesem Fall dann mit einem Kühlmittelbehälter verbunden ist, in dem sich vornehmlich Kühlmittel in der gasförmigen Phase befindet. In an alternative embodiment, the coolant tank 12 can also comprise a plurality of separate coolant tanks, the gas connection 25 in this Case is then connected to a coolant tank in which there is primarily coolant in the gaseous phase.
Eine fluidische Verbindung zwischen Gasleitung 15 und Zwischenleitung 16 kann zwischen dem schaltbaren Ventil 6 und dem Verzeigungspunkt 18 bestehen. Hierbei sollte die Verbindung zwischen Gasleitung 15 und Zwischenleitung 16 möglichst nah an dem schaltbaren Ventil 6 angeordnet sein, damit das Kühlmittel in der gasförmigen Phase einen möglichst großen Anteil an Kühlmittel in der flüs sigen Phase aus dem Leitungssystem, bestehend aus Zwischenleitung 16 und mindestens einer Serviceleitung 20, 30 verdrängt. A fluidic connection between the gas line 15 and the intermediate line 16 can exist between the switchable valve 6 and the branching point 18. Here, the connection between the gas line 15 and the intermediate line 16 should be arranged as close as possible to the switchable valve 6, so that the coolant in the gaseous phase has the greatest possible proportion of coolant in the liquid phase from the line system, consisting of the intermediate line 16 and at least one service line 20, 30 ousted.
In der Gasleitung 15 kann ein weiteres schaltbares Ventil 25 angeordnet sein.A further switchable valve 25 can be arranged in the gas line 15.
Auf diese Weise ist es möglich, dass während eines ersten Befüllzeitraumes Kühlmittel in der flüssigen Phase über den Fluidanschluss 4 aus dem Kühlmittel tank 12 zur Fahrzeuglimaanlage 100 strömt, während in einem zweiten Befüll- zeitraum Kühlmittel in der gasförmigen Phase über den Gasanschluss 5 aus dem Kühlmitteltank 12 eines zur Fahrzeugklimaanlage 100 strömt. In this way, it is possible for coolant in the liquid phase to flow from the coolant tank 12 to the vehicle air conditioning system 100 in the liquid phase during a first filling period, while coolant in the gaseous phase flows from the coolant tank via the gas connection 5 in a second filling period 12 one flows to the vehicle air conditioner 100.
Während des ersten Befüllzeitraumes ist das schaltbaren Ventil 6 geöffnet, so dass eine Verbindung zwischen der Entnahmeleitung 14 und der Zwischenlei tung 16 besteht, während das weitere schaltbare Ventil 25 geschlossen ist, so dass kein Kühlmittel durch die Gasleitung 15 strömen kann. During the first filling period, the switchable valve 6 is open, so that there is a connection between the extraction line 14 and the intermediate line 16, while the further switchable valve 25 is closed, so that no coolant can flow through the gas line 15.
Während des zweiten Befüllzeitraumes ist das schaltbaren Ventil 6 geschlossen, so dass keine Verbindung zwischen der Entnahmeleitung 14 und der Zwischen leitung 16 besteht, während das weitere schaltbare Ventil 25 geöffnet ist, so dass Kühlmittel in der gasförmigen Phase durch die Gasleitung 15 strömen kann. During the second filling period, the switchable valve 6 is closed, so that there is no connection between the extraction line 14 and the intermediate line 16, while the further switchable valve 25 is open, so that coolant can flow through the gas line 15 in the gaseous phase.
Während des zweiten Befüllzeitraumes wird das Leitungssystem 16, 20, 30 des Klimaservicegerätes 1 mit Kühlmittel in der gasförmigen Phase befüllt, indem eventuell noch vorhandene Bestandteile von Kühlmittel in der flüssigen Phase durch das Kühlmittel in der gasförmigen Phase aus dem Leitungssystem 16, 20, 30 in die Fahrzeugklimaanlage 100 verdrängt werden. Der zweite Befüllzeitraum wird beendet, wenn das Leitungssystem 16, 20, 30 vollständig mit Kühlmittel in der gasförmigen Phase befüllt ist. During the second filling period, the line system 16, 20, 30 of the air conditioning service device 1 is filled with coolant in the gaseous phase, in that any components of coolant still present in the liquid phase are removed from the line system 16, 20, 30 in by the coolant in the gaseous phase the vehicle air conditioner 100 are displaced. The second filling period is ended when the line system 16, 20, 30 is completely filled with coolant in the gaseous phase.
Figur 4 zeigt ein Klimaservicegerät 1 zum Befüllen einer Fahrzeugklimaanlage 100 in schematischer Darstellung gemäß einem zweiten Ausführungsbeispiel. FIG. 4 shows an air conditioning service device 1 for filling a vehicle air conditioning system 100 in a schematic illustration according to a second exemplary embodiment.
Die Gasleitung 15 ist hier über das schaltbare Ventile 6 mit der Verzweigungslei tung 16 verbunden ist, wobei über das schaltbare Ventile 6 entweder die Verbin dung zwischen Gasleitung 15 und Zwischenleitung 16 freigegeben wird oder die Verbindung zwischen Entnahmeleitung 14 und Zwischenleitung 16 freigegeben wird, wobei die jeweils andere Verbindung geschlossen wird. The gas line 15 is connected here via the switchable valves 6 to the branching line 16, wherein either the connection between the gas line 15 and the intermediate line 16 is released via the switchable valves 6 or the connection between the extraction line 14 and the intermediate line 16 is released, the each other connection is closed.
Figur 5 zeigt ein Flussablaufdiagramm des Verfahrens zum Befüllen einer Klima anlage 100. Im ersten Verfahrensschritt 300, welcher dem ersten Befüllzeitraum entspricht, wird das Kühlmittel über einen Fluidanschluss 4 und eine Entnahme leitung 14 aus dem Kühlmitteltank 12 eines Klimaservicegerätes 1 zur Fahr zeuglimaanlage 100 geleitet. FIG. 5 shows a flowchart diagram of the method for filling an air conditioning system 100. In the first method step 300, which corresponds to the first filling period, the coolant is passed via a fluid connection 4 and a removal line 14 from the coolant tank 12 of an air conditioning service device 1 to the vehicle air conditioning system 100.
Im zweiten Verfahrensschritt 400, welcher dem zweiten Befüllzeitraum entspricht, wird das Kühlmittel über einen Gasanschluss 5 und eine Gasleitung 15 aus demIn the second method step 400, which corresponds to the second filling period, the coolant is removed via a gas connection 5 and a gas line 15
Kühlmitteltank 12 eines Klimaservicegerätes 1 zur Fahrzeuglimaanlage 100 ge leitet. Coolant tank 12 of an air conditioning service device 1 to the vehicle air conditioning system 100 passes.

Claims

Ansprüche Expectations
1. Klimaservicegerät (1) zum Befüllen einer Fahrzeugklimaanlage (100) mit einem Kühlmitteltank (12), einer Entnahmeleitung (14), welche über ei nen Fluidanschluss (4) mit dem Kühlmitteltank (12) verbunden ist, einer Zwischenleitung (16), wobei die Zwischenleitung (16) ein schaltbares Ventil (6) aufweist und über einen Verzweigungspunkt (18) mit mindes tens einer Serviceleitung (20, 30 )verbunden ist, dadurch gekennzeich net, dass eine Gasleitung (15) über einen Gasanschluss (5) mit dem Kühlmitteltank (12) und mit der Zwischenleitung (16) verbunden ist, wo bei über die Gasleitung (15) Kühlmittel aus dem Kühlmitteltank (12) in die Zwischenleitung (16) strömen kann. 1. A / C service device (1) for filling a vehicle air conditioning system (100) with a coolant tank (12), an extraction line (14) which is connected via a fluid connection (4) to the coolant tank (12), an intermediate line (16), wherein the intermediate line (16) has a switchable valve (6) and is connected via a branching point (18) to at least one service line (20, 30), characterized in that a gas line (15) via a gas connection (5) with the Coolant tank (12) and connected to the intermediate line (16), where coolant can flow from the coolant tank (12) into the intermediate line (16) via the gas line (15).
2. Klimaservicegerät (1) nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Gasanschluss (25) im oberen Bereich des Kühlmitteltanks (12) angeordnet ist. 2. Air conditioning service device (1) according to one of the preceding claims, characterized in that the gas connection (25) is arranged in the upper region of the coolant tank (12).
3. Klimaservicegerät (1) nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Fluidanschluss (4) im unteren Bereich des Kühlmitteltanks (12) angeordnet ist. 3. Air conditioning service device (1) according to one of the preceding claims, characterized in that the fluid connection (4) is arranged in the lower region of the coolant tank (12).
4. Klimaservicegerät (1) nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass eine Verbindung zwischen Gasleitung (15) und Zwischenleitung (16) zwischen dem schaltbaren Ventil (6) und dem Ver- zeigungspunkt (18) angeordnet ist. 4. Air conditioning service device (1) according to any one of the preceding claims, characterized in that a connection between the gas line (15) and the intermediate line (16) between the switchable valve (6) and the branching point (18) is arranged.
5. Klimaservicegerät (1) nach Anspruch 4, dadurch gekennzeichnet, dass in der Gasleitung (15) ein weiteres schaltbares Ventil (25) angeordnet ist. 5. Air conditioning service device (1) according to claim 4, characterized in that a further switchable valve (25) is arranged in the gas line (15).
6. Klimaservicegerät (1) nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Gasleitung (15) über das schaltbare Ventile (6) mit der Verzweigungsleitung (16) verbunden ist, wobei über das schalt bare Ventile (16) entweder die Verbindung zwischen Gasleitung (15) und Zwischenleitung (16) freigegeben ist oder die Verbindung zwischen Ent nahmeleitung (14) und Zwischenleitung (16) freigegeben ist, wobei die jeweils andere Verbindung geschlossen ist. 6. Air conditioning service device (1) according to one of the preceding claims, characterized in that the gas line (15) via the switchable valves (6) is connected to the branch line (16), with the switchable valves (16) either enabling the connection between the gas line (15) and the intermediate line (16) or releasing the connection line (14) and the intermediate line (16), the other connection being closed.
7. Verfahren zum Befüllen einer Fahrzeugklimaanlage (100), wobei in ei nem ersten Befüllzeitraum Kühlmittel über einen Fluidanschluss (4) und eine Entnahmeleitung (14) aus dem Kühlmitteltank (12) eines Klimaser vicegerätes (1) zur Fahrzeuglimaanlage (100) geleitet wird, während in einem zweiten Befüllzeitraum Kühlmittel über einen Gasanschluss (5) und eine Gasleitung (15) aus dem Kühlmitteltank (12) eines Klimaser vicegerätes (1) zur Fahrzeugklimaanlage (100) geleitet wird. 7. A method for filling a vehicle air conditioning system (100), wherein coolant is fed to the vehicle air conditioning system (100) in a first filling period via a fluid connection (4) and a removal line (14) from the coolant tank (12) of a climate control device (1). while in a second filling period coolant is led via a gas connection (5) and a gas line (15) from the coolant tank (12) of a climate control device (1) to the vehicle air conditioning system (100).
8. Verfahren nach Anspruch 7, wobei durch den Fluidanschluss (4) Kühlmit tel in der flüssigen Phase dem Kühlmitteltank (12) entnommen wird und über den Gasanschluss (5) Kühlmittel in der gasförmigen Phase dem Kühlmitteltank (12) entnommen wird. 8. The method according to claim 7, wherein coolant in the liquid phase is removed from the coolant tank (12) through the fluid connection (4) and coolant in the gaseous phase is removed from the coolant tank (12) via the gas connection (5).
9. Verfahren nach Anspruch 7 oder 8, wobei im zweiten Befüllzeitraum ein Leitungssystem (16, 20, 30) des Klimaservicegerätes (1) mit Kühlmittel in der gasförmigen Phase befüllt wird. 9. The method according to claim 7 or 8, wherein in the second filling period, a line system (16, 20, 30) of the air conditioning service device (1) is filled with coolant in the gaseous phase.
10. Verfahren nach Anspruch 9, wobei der zweiten Befüllzeitraum beendet wird, wenn das Leitungssystem (16, 20, 30) vollständig mit Kühlmittel in der gasförmigen Phase befüllt ist. 10. The method according to claim 9, wherein the second filling period is ended when the line system (16, 20, 30) is completely filled with coolant in the gaseous phase.
PCT/EP2019/068563 2018-09-07 2019-07-10 Air-conditioning servicing appliance, and method for filling a vehicle air-conditioning system WO2020048665A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140260352A1 (en) * 2013-03-14 2014-09-18 Service Solutions U.S. Llc Temperature controlled service hoses for improved refrigerant charge accuracy
US20180164008A1 (en) * 2015-05-29 2018-06-14 Snap-On Climate Solutions S.R.L. Method for loading refrigerant fluid in an air conditioning system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140260352A1 (en) * 2013-03-14 2014-09-18 Service Solutions U.S. Llc Temperature controlled service hoses for improved refrigerant charge accuracy
US20180164008A1 (en) * 2015-05-29 2018-06-14 Snap-On Climate Solutions S.R.L. Method for loading refrigerant fluid in an air conditioning system

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