WO2001038116A1 - Coolant circuit - Google Patents
Coolant circuit Download PDFInfo
- Publication number
- WO2001038116A1 WO2001038116A1 PCT/DE2000/004016 DE0004016W WO0138116A1 WO 2001038116 A1 WO2001038116 A1 WO 2001038116A1 DE 0004016 W DE0004016 W DE 0004016W WO 0138116 A1 WO0138116 A1 WO 0138116A1
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- WO
- WIPO (PCT)
- Prior art keywords
- compressor
- liquid separator
- oil
- refrigerant circuit
- additional
- 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.)
- Ceased
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3223—Cooling devices using compression characterised by the arrangement or type of the compressor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3226—Self-contained devices, i.e. including own drive motor
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
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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
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
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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
- F25B31/00—Compressor arrangements
- F25B31/02—Compressor arrangements of motor-compressor units
Definitions
- the invention relates to a refrigerant circuit, in particular an air conditioning system for motor vehicles, in which a mechanically driven compressor, an evaporator and a liquid separator arranged between the compressor and evaporator and having an outer housing are provided.
- the compressor In conventional air conditioning systems for vehicles, the compressor is driven by the internal combustion engine.
- the compressor must be lubricated, which means that lubricating oil, so-called refrigeration machine oil, is also present in the refrigerant.
- refrigeration machine oil so-called refrigeration machine oil
- Many previous vehicle air conditioning systems have a liquid separator.
- the oil and liquid refrigerant is separated in the suction-side liquid separator, also called an accumulator, arranged between the evaporator and the compressor and collects in a sump in which abrasion and other contaminants can also be deposited.
- the liquid separator protects the compressor from so-called liquid impacts and ensures oil return to the mechanically driven compressor by simultaneously using a suction pipe designed as a siphon tube that projects into the oil sump and has a nozzle hole in the area of the oil sump oil can also be sucked out of the oil sump.
- the object of the invention is to provide a simple refrigerant circuit which can be operated both mechanically and electrically.
- this refrigerant circuit should lead to an air conditioning system for a motor vehicle, by means of which air conditioning of the passenger compartment can be achieved even when the internal combustion engine is switched off.
- the invention provides for simple integration of a compressor driven by an electric motor in the liquid separator which is present anyway, the electrically driven compressor providing for air conditioning when the mechanical drive is at a standstill, which in a motor vehicle is usually the internal combustion engine.
- the additional compressor and its electric motor are lubricated using the oil in the refrigerant circuit by simply integrating the additional compressor and electric motor into the existing liquid separator, which means the number of parts, the installation space, the weight and the effort for the air conditioning when the mechanical drive motor is switched off Limits.
- the auxiliary compressor is preferably connected in parallel to the mechanically driven compressor, and a free end of a suction line of the auxiliary compressor ends in the liquid separator. It is therefore not necessary to branch off a line provided from the evaporator to the liquid separator, via which the additional compressor sucks in refrigerant. Rather, the branching takes place within the liquid separator.
- the liquid separator is designed in such a way that the previously mentioned oil sump forms in it.
- the electric motor or the additional compressor protrudes into this oil sump in such a way that it is lubricated.
- the additional compressor is lubricated in that, on the one hand, refrigerant with the carried-in oil is fed into the liquid separator, which can also be deposited on the additional compressor as a mist.
- a shaft of the electric motor or auxiliary compressor protruding into the oil sump also enables the oil to be transported to the auxiliary compressor.
- a riser pipe, a further siphon line or an oil pump integrated in the liquid separator could also provide a corresponding oil supply to the additional compressor.
- the compressor is a so-called fully hermetic compressor.
- Voilhermetic compressors are characterized in that the electric motor and the compressor are housed in a common housing, the so-called capsule, and there is no shaft bushing to the outside, which is provided in the so-called open compressor.
- the fully hermetic compressor has a capsule composed of several parts, in which the parts are welded or soldered or otherwise permanently connected to one another.
- the invention now provides for the fully hermetic compressor to be used simultaneously as a liquid separator. see that the capsule forms the outer housing of the liquid separator.
- the fully hermetic compressor may need to be modified only slightly, for example by inserting the aforementioned siphon tube into it or by additionally arranging a dryer which is now usually integrated in the liquid separator in the housing.
- the design of the additional compressor as a semi-hermetic compressor is also conceivable, whereby the tightness of the capsule must be ensured here.
- An advantage of this training is the accessibility of the interior of the capsule, for. B. for replacing the dryer.
- Figure 1 shows a possible embodiment of the refrigerant circuit according to the invention shown schematically in the form of a motor vehicle air conditioning and
- FIG. 2 shows a semi-hermetic auxiliary compressor that can be used in the refrigerant circuit according to FIG. 1.
- FIG. 1 shows a refrigerant circuit in the form of an air conditioning system for a motor vehicle.
- the refrigerant circuit has a mechanically, more precisely, a compressor 12 driven by an internal combustion engine 10, a downstream condenser 14, an expansion device 16, an evaporator 18 and a liquid separator 20 arranged between the mechanically driven compressor 12 and evaporator 18.
- the liquid separator 20 is formed by a fully hermetic compressor, which in turn forms a capsule 22, which is also the outer housing of the liquid separator 20 the capsule 22 integrated electric motor 24 and an additional compressor 26, which is driven by the electric motor 24, is formed.
- the additional compressor 26 is connected in parallel to the mechanically driven compressor 12 and, like the electric motor 24, is arranged in the capsule 22.
- an oil sump 30 is provided, which is formed from refrigerator oil, which can be carried in the refrigerant.
- the deepest point of a siphon tube 32 projects into the oil sump 30 and also forms the intake tube for the mechanically driven compressor 12.
- a nozzle bore is provided at the lowest point of the siphon tube 32. The free end 34 of the siphon tube 32 clearly protrudes from the oil sump 30.
- the additional compressor 26 also has an intake line 36 with a free end, which also ends in the capsule 22 and clearly above the oil sump 30.
- the electric motor 24 is otherwise arranged in the capsule 22 so that it projects into the oil sump 30, as a result of which it is adequately supplied with lubricant during its operation.
- the air conditioning system shown works as follows: If the internal combustion engine 10 is switched on, it drives the compressor 12, in which the refrigerant is compressed. The refrigerant is condensed in the subsequent condenser 14 before it can expand in the expansion device 16, for example in the form of an expansion valve, and it undergoes a phase transition in the subsequent evaporator 18.
- the evaporator 18 is usually coupled to an evaporator fan 48, which transports the air to be cooled.
- the refrigerant vapor finally gets into the liquid separator 20, which also serves as an oil separator.
- the oil carried with the refrigerant can at least partially precipitate in the oil sump 30. Adequate supply of the compressor 12 is ensured by the suction of the refrigerant via the siphon tube 32.
- the electric motor 24 is preferably switched off, so that the additional compressor 26 does no additional compression work.
- the electric motor 24 is switched on and drives the additional compressor 26.
- This sucks in refrigerant via its intake line 36 and compresses the refrigerant that flows to the condenser 14.
- the parallel connection of compressor 12 and additional compressor 26 makes it possible to operate the refrigerant circuit only with the additional compressor 26.
- the auxiliary compressor 26 is lubricated by the oil carried in the refrigerant vapor and further by the fact that the motor 24 sprays oil from the oil sump 30 in the capsule 22, so that an oil mist forms in part and some oil is transported directly to the desired locations on the auxiliary compressor 26 ,
- a semi-hermetic compressor (FIG. 2) can also be provided, which is composed of an upper and a lower housing part 50, 52 which are flanged together and releasably connected to one another by means of screws 54.
- a dryer 56 is optionally accommodated in the capsule 22.
- the semi-hermetic version can also consist solely in that a lid, a cap or a cartridge for exchanging a dryer material of the dryer is loosened, e.g. B. can be unscrewed. LIST OF REFERENCE NUMBERS
- Combustion engine Compressor: Condenser: Expansion device: Evaporator: Liquid separator: Capsule: Electric motor: Additional compressor: Oil sump: Siphon tube: Free end: Intake line: Evaporator fan: Upper housing part: Lower housing part: Screws: dryer
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Description
Kältemittelkreislauf Refrigerant circulation
Stand der TechnikState of the art
Die Erfindung betrifft einen Kältemittelkreislauf, insbesondere eine Klimaanlage für Kraftfahrzeuge, in welchem ein mechanisch angetriebener Kompressor, ein Ver- dampfer und ein zwischen Kompressor und Verdampfer angeordneter, ein Außengehäuse aufweisender Flüssigkeitsabscheider vorgesehen sind.The invention relates to a refrigerant circuit, in particular an air conditioning system for motor vehicles, in which a mechanically driven compressor, an evaporator and a liquid separator arranged between the compressor and evaporator and having an outer housing are provided.
Bei bislang üblichen Fahrzeugklimaanlagen wird der Kompressor vom Verbrennungsmotor angetrieben. Der Kompressor muß geschmiert werden, was dazu führt, daß im Kältemittel auch Schmieröl, sogenanntes Kältemaschinenöl, vorhanden ist. Viele bisherige Fahrzeugklimaanlagen weisen einen Flüssigkeitsabscheider auf. Im zwischen Verdampfer und Kompressor angeordneten saugseitigen Flüssigkeitsabscheider, auch Akkumulator genannt, wird das Öl und flüssiges Kältemittel abgeschieden und sammelt sich in einem Sumpf, in dem sich auch Ab- rieb und andere Verunreinigungen niederschlagen können. Der Flüssigkeitsabscheider schützt den Kompressor vor sogenannten Flüssigkeitsschlägen und gewährleistet die Ölrückführung zu dem mechanisch angetriebenen Kompressor, indem über ein als Syphonrohr ausgebildetes Ansaugrohr, das in den Ölsumpf ragt und eine Düsenbohrung im Bereich des Ölsumpfes hat, das dampfförmige Kältemittel und, über die Düsenbohrung, gleichzeitig auch Öl aus dem Ölsumpf angesaugt werden. Bei abgeschaltetem Verbrennungsmotor ist eine Klimatisierung des Fahrzeugs bislang nicht möglich.In conventional air conditioning systems for vehicles, the compressor is driven by the internal combustion engine. The compressor must be lubricated, which means that lubricating oil, so-called refrigeration machine oil, is also present in the refrigerant. Many previous vehicle air conditioning systems have a liquid separator. The oil and liquid refrigerant is separated in the suction-side liquid separator, also called an accumulator, arranged between the evaporator and the compressor and collects in a sump in which abrasion and other contaminants can also be deposited. The liquid separator protects the compressor from so-called liquid impacts and ensures oil return to the mechanically driven compressor by simultaneously using a suction pipe designed as a siphon tube that projects into the oil sump and has a nozzle hole in the area of the oil sump oil can also be sucked out of the oil sump. Up to now, air conditioning of the vehicle has not been possible with the internal combustion engine switched off.
Aufgabe der Erfindung ist es, einen einfach aufgebauten Kältemittelkreislauf zu schaffen, der sowohl mechanisch als auch elektisch betrieben werden kann. Insbesondere soll dieser Kältemittelkreislauf zu einer Klimaanlage für ein Kraftfahrzeug führen, durch die sich auch bei ausgeschaltetem Verbrennungsmotor eine Klimatisierung des Fahrgastinnenraumes erzielen läßt.The object of the invention is to provide a simple refrigerant circuit which can be operated both mechanically and electrically. In particular, this refrigerant circuit should lead to an air conditioning system for a motor vehicle, by means of which air conditioning of the passenger compartment can be achieved even when the internal combustion engine is switched off.
Vorteile der ErfindungAdvantages of the invention
Diese Aufgabe wird bei einem Kältemittelkreislauf der eingangs genannten Art dadurch gelöst, daß in den Kältemittelkreislauf ein durch einen Elektromotor angetriebener Zusatzkompressor integriert ist, wobei Zusatzkompressor und Elektromo- tor innerhalb des Flüssigkeitsabscheiders angeordnet und durch das sich im Flüssigkeitsabscheider befindliche Öl geschmiert werden.This object is achieved in a refrigerant circuit of the type mentioned above in that an additional compressor driven by an electric motor is integrated in the refrigerant circuit, the additional compressor and electric motor being arranged within the liquid separator and being lubricated by the oil located in the liquid separator.
Die Erfindung sieht eine einfache Integration eines über einen Elektromotor angetriebenen Kompressors im ohnehin vorhandenen Flüssigkeitsabscheider vor, wo- bei der elektrisch angetriebene Kompressor für die Klimatisierung bei Stillstand des mechanischen Antriebs, was bei einem Kraftfahrzeug üblicherweise der Verbrennungsmotors ist, sorgt. Die Schmierung des Zusatzkompressors und seines Elektromotors erfolgt unter Verwendung des Öles im Kältemittelkreislauf, indem einfach Zusatzkompressor und Elektromotor in den ohnehin vorhandenen Flüs- sigkeitsabscheider integriert werden, was die Teileanzahl, den Bauraum, das Gewicht und den Aufwand für die Klimatisierung bei ausgeschaltetem mechanischem Antriebsmotor in Grenzen hält.The invention provides for simple integration of a compressor driven by an electric motor in the liquid separator which is present anyway, the electrically driven compressor providing for air conditioning when the mechanical drive is at a standstill, which in a motor vehicle is usually the internal combustion engine. The additional compressor and its electric motor are lubricated using the oil in the refrigerant circuit by simply integrating the additional compressor and electric motor into the existing liquid separator, which means the number of parts, the installation space, the weight and the effort for the air conditioning when the mechanical drive motor is switched off Limits.
Vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprü- chen. Vorzugsweise ist der Zusatzkompressor parallel zum mechanisch angetriebenen Kompressor geschaltet, und ein freies Ende einer Ansaugleitung des Zusatzkompressors endet im Fiüssigkeitsabscheider. Es ist also keine Abzweigung einer vom Verdampfer zum Flüssigkeitsabscheider vorgesehenen Leitung erforderlich, über die der Zusatzkompressor Kältemittel ansaugt. Die Abzweigung erfolgt vielmehr innerhalb des Flüssigkeitsabscheiders.Advantageous refinements of the invention result from the subclaims. The auxiliary compressor is preferably connected in parallel to the mechanically driven compressor, and a free end of a suction line of the auxiliary compressor ends in the liquid separator. It is therefore not necessary to branch off a line provided from the evaporator to the liquid separator, via which the additional compressor sucks in refrigerant. Rather, the branching takes place within the liquid separator.
Der Flüssigkeitsabscheider ist gemäß einer anderen vorteilhaften Ausbildung so ausgebildet, daß sich in ihm der zuvor bereits erwähnte Ölsumpf bildet. Der Eiek- tromotor oder der Zusatzkompressor ragt in diesen Ölsumpf derart, daß er geschmiert wird. Es ist jedoch bereits ausreichend, wenn ein Wellenende des Elektromotors oder des Kompressors in den Ölsumpf ragt. Zusatzleitungen für die Zufuhr des Öles zum Elektromotor können entfallen.According to another advantageous embodiment, the liquid separator is designed in such a way that the previously mentioned oil sump forms in it. The electric motor or the additional compressor protrudes into this oil sump in such a way that it is lubricated. However, it is sufficient if one shaft end of the electric motor or the compressor protrudes into the oil sump. Additional lines for supplying the oil to the electric motor can be omitted.
Der Zusatzkompressor wird dadurch geschmiert, daß einerseits in den Flüssigkeitsabscheider Kältemittel mit dem mitgeführten Öl eingespeist wird, das sich als Nebel auch an dem Zusatzkompressor niederschlagen kann. Andererseits ermöglicht eine in den Ölsumpf ragende Welle des Elektromotors oder Zusatzkompressors auch einen Transport des Öles zum Zusatzkompressor. Gegebenenfalls könnte auch ein Steigrohr, eine weitere Syphonleitung oder eine in dem Flüssigkeitsabscheider integrierte Ölpumpe für eine entsprechende Ölzufuhr zum Zusatzkompressor sorgen.The additional compressor is lubricated in that, on the one hand, refrigerant with the carried-in oil is fed into the liquid separator, which can also be deposited on the additional compressor as a mist. On the other hand, a shaft of the electric motor or auxiliary compressor protruding into the oil sump also enables the oil to be transported to the auxiliary compressor. If necessary, a riser pipe, a further siphon line or an oil pump integrated in the liquid separator could also provide a corresponding oil supply to the additional compressor.
Bei der bevorzugten Ausführungsform ist der Kompressor ein sogenannter voll- hermetischer Kompressor. Voilhermetische Kompressoren sind dadurch gekennzeichnet, daß der Elektromotor und der Kompressor in einem gemeinsamen Gehäuse, der sogenannten Kapsel, untergebracht sind und keine Wellendurchführung nach außen vorhanden ist, die beim sogenannten offenen Kompressor vorgesehen ist. Der vollhermetische Kompressor weist eine aus mehreren Teilen zu- sammengesetzte Kapsel auf, bei der die Teile verschweißt oder verlötet oder auf sonstige Weise unlösbar miteinander verbunden sind. Die Erfindung sieht nun vor, den vollhermetischen Kompressor gleichzeitig als Flüssigkeitsabscheider vorzu- sehen, indem die Kapsel das Außengehäuse des Fiüssigkeitsabscheiders bildet. Der vollhermetische Kompressor muß ggf. nur geringfügig modifiziert werden, zum Beispiel indem das zuvor bereits erwähnte Syphonrohr in ihn eingebracht wird oder indem zusätzlich ein inzwischen üblicherweise in den Flüssigkeitsabscheider integrierter Trockner mit in dem Gehäuse angeordnet wird.In the preferred embodiment, the compressor is a so-called fully hermetic compressor. Voilhermetic compressors are characterized in that the electric motor and the compressor are housed in a common housing, the so-called capsule, and there is no shaft bushing to the outside, which is provided in the so-called open compressor. The fully hermetic compressor has a capsule composed of several parts, in which the parts are welded or soldered or otherwise permanently connected to one another. The invention now provides for the fully hermetic compressor to be used simultaneously as a liquid separator. see that the capsule forms the outer housing of the liquid separator. The fully hermetic compressor may need to be modified only slightly, for example by inserting the aforementioned siphon tube into it or by additionally arranging a dryer which is now usually integrated in the liquid separator in the housing.
Die Ausbildung des Zusatzkompressors als halbhermetischer Kompressor ist ebenfalls denkbar, wobei hier die Dichtigkeit der Kapsel gewährleistet sein muß. Ein Vorteil dieser Ausbildung ist die Zugänglichkeit des Inneren der Kapsel, z. B. für den Austausch des Trockners.The design of the additional compressor as a semi-hermetic compressor is also conceivable, whereby the tightness of the capsule must be ensured here. An advantage of this training is the accessibility of the interior of the capsule, for. B. for replacing the dryer.
Zeichnungendrawings
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung und aus den Zeichnungen, auf die Bezug genommen wird.Further features and advantages of the invention result from the following description and from the drawings, to which reference is made.
Figur 1 zeigt eine mögliche Ausgestaltung des erfindungsgemäßen schematisch dargestellten Kältemittelkreislaufs in Form einer Kraftfahrzeugklimaaniage undFigure 1 shows a possible embodiment of the refrigerant circuit according to the invention shown schematically in the form of a motor vehicle air conditioning and
Figur 2 einen in dem Kältemittelkreislauf nach Figur 1 einsetzbaren halbhermetischen Zusatzkompressor.FIG. 2 shows a semi-hermetic auxiliary compressor that can be used in the refrigerant circuit according to FIG. 1.
Beschreibung der AusführungsbeispieleDescription of the embodiments
In Figur 1 ist ein Kältemittelkreislaufs in Form einer Klimaanlage für ein Kraftfahrzeug dargestellt. Der Kältemittelkreislauf weist einen mechanisch, genauer gesagt über einen Verbrennungsmotor 10 angetriebenen Kompressor 12, einen nachfolgenden Verflüssiger 14, eine Expansionsvorrichtung 16, einen Verdampfer 18 und einen zwischen mechanisch angetriebenem Kompressor 12 und Verdampfer 18 angeordneten Flüssigkeitsabscheider 20 auf. Der Flüssigkeitsabscheider 20 wird durch einen vollhermetischen Kompressor gebildet, der wiederum eine Kapsel 22, die gleichzeitig das Außengehäuse des Flüssigkeitsabscheiders 20 ist, einen in der Kapsel 22 integrierten Elektromotor 24 und einen Zusatzkompressor 26, der vom Elektromotor 24 angetrieben wird, gebildet ist. Der Zusatzkompressor 26 ist im übrigen parallel zum mechanisch angetriebenen Kompressor 12 geschaltet und wie der Elektromotor 24 in der Kapsel 22 angeordnet. Im Flüssigkeitsabscheider 20 ist ein Ölsumpf 30 vorgesehen, der aus Kältemaschinenöl, welches im Kältemittel mitgeführt werden kann, gebildet ist. In den Ölsumpf 30 ragt die tiefste Stelle eines Syphonrohres 32, welches zudem das Ansaugrohr für den mechanisch angetriebenen Kompressor 12 bildet. An der tiefsten Stelle des Syphonrohres 32 ist eine nicht dargestellte Düsenbohruπg vorgesehen. Das freie Ende 34 des Syphonrohres 32 ragt aus dem Ölsumpf 30 deutlich heraus.FIG. 1 shows a refrigerant circuit in the form of an air conditioning system for a motor vehicle. The refrigerant circuit has a mechanically, more precisely, a compressor 12 driven by an internal combustion engine 10, a downstream condenser 14, an expansion device 16, an evaporator 18 and a liquid separator 20 arranged between the mechanically driven compressor 12 and evaporator 18. The liquid separator 20 is formed by a fully hermetic compressor, which in turn forms a capsule 22, which is also the outer housing of the liquid separator 20 the capsule 22 integrated electric motor 24 and an additional compressor 26, which is driven by the electric motor 24, is formed. The additional compressor 26 is connected in parallel to the mechanically driven compressor 12 and, like the electric motor 24, is arranged in the capsule 22. In the liquid separator 20, an oil sump 30 is provided, which is formed from refrigerator oil, which can be carried in the refrigerant. The deepest point of a siphon tube 32 projects into the oil sump 30 and also forms the intake tube for the mechanically driven compressor 12. At the lowest point of the siphon tube 32, a nozzle bore, not shown, is provided. The free end 34 of the siphon tube 32 clearly protrudes from the oil sump 30.
Der Zusatzkompressor 26 hat ebenfalls eine Ansaugleitung 36 mit einem freien Ende, das ebenfalls in der Kapsel 22 und deutlich oberhalb des Ölsumpfes 30 endet.The additional compressor 26 also has an intake line 36 with a free end, which also ends in the capsule 22 and clearly above the oil sump 30.
Der Elektromotor 24 ist in der Kapsel 22 im übrigen so angeordnet, daß er in den Ölsumpf 30 ragt, wodurch er während seines Betriebes ausreichend mit Schmiermittel versorgt wird.The electric motor 24 is otherwise arranged in the capsule 22 so that it projects into the oil sump 30, as a result of which it is adequately supplied with lubricant during its operation.
Die dargestellte Klimaanlage arbeitet folgendermaßen: Ist der Verbrennungsmotor 10 eingeschaltet, so treibt er den Kompressor 12 an, in welchem das Kältemittel verdichtet wird. Im anschließenden Verflüssiger 14 wird das Kältemittel kondensiert, bevor es in der Expansionsvorrichtung 16, beispielsweise in Form eines Expansionsventils, expandieren kann und es im anschließenden Verdampfer 18 ei- nen Phasenübergang erfährt. Der Verdampfer 18 ist üblicherweise mit einem Verdampfergebläse 48 gekoppelt, das die zu kühlende Luft transportiert. Der Kältemitteldampf gelangt schließlich in den Flüssigkeitsabscheider 20, der gleichzeitig als Ölabscheider dient. Das mit dem Kältemittel mitgeführte Öl kann sich wenigstens zum Teil im Ölsumpf 30 niederschlagen. Die ausreichende Versorgung des Kompressors 12 ist durch die Ansaugung des Kältemittels über das Syphonrohr 32 gewährleistet. Dies erfolgt dadurch, daß über das Syphonrohr 32 aus dem Inneren des Flüssigkeitsabscheiders 20 Kältemitteldampf, und, über die Düsenboh- rung an der tiefsten Stelle des Syphonrohres 32, auch Öl aus dem Ölsumpf 30 angesaugt und zum Kompressor 12 transportiert wird. Der Kompressor 12 ist somit stets mit ausreichend Öl versorgt, und es bedarf keiner zusätzlichen Schmiermittelleitungen.The air conditioning system shown works as follows: If the internal combustion engine 10 is switched on, it drives the compressor 12, in which the refrigerant is compressed. The refrigerant is condensed in the subsequent condenser 14 before it can expand in the expansion device 16, for example in the form of an expansion valve, and it undergoes a phase transition in the subsequent evaporator 18. The evaporator 18 is usually coupled to an evaporator fan 48, which transports the air to be cooled. The refrigerant vapor finally gets into the liquid separator 20, which also serves as an oil separator. The oil carried with the refrigerant can at least partially precipitate in the oil sump 30. Adequate supply of the compressor 12 is ensured by the suction of the refrigerant via the siphon tube 32. This takes place in that refrigerant vapor 20 from the interior of the liquid separator 20 via the siphon tube 32, and, via the nozzle bore tion at the lowest point of the siphon tube 32, oil is also sucked out of the oil sump 30 and transported to the compressor 12. The compressor 12 is thus always supplied with sufficient oil and no additional lubricant lines are required.
Bei eingeschaltetem Verbrennungsmotor 10 ist der Elektromotor 24 vorzugsweise ausgeschaltet, so daß der Zusatzkompressor 26 keine zusätzliche Verdichtungsarbeit leistet.When the internal combustion engine 10 is switched on, the electric motor 24 is preferably switched off, so that the additional compressor 26 does no additional compression work.
Wird jedoch der Verbrennungsmotor 10 ausgeschaltet und ist eine Klimatisierung des Fahrzeugiπnenraums erwünscht, wird der Elektromotor 24 angeschaltet und treibt den Zusatzkompressor 26 an. Dieser saugt Kältemittel über seine Ansaugleitung 36 an und verdichtet das Kältemittel, welches zum Verflüssiger 14 strömt. Durch die Parallelschaltung von Kompressor 12 und Zusatzkompressor 26 ist es möglich, den Kältemittelkreislauf nur mit dem Zusatzkompressor 26 zu betreiben. Der Zusatzkompressor 26 wird über das im Kältemitteldampf mitgeführte Öl und ferner dadurch geschmiert, daß der Motor 24 Öl aus dem Ölsumpf 30 in der Kapsel 22 verspritzt, so daß sich teilweise ein Ölnebel bildet und teilweise Öl direkt zu den gewünschten Stellen am Zusatzkompressor 26 transportiert wird.However, if the internal combustion engine 10 is switched off and air conditioning of the vehicle interior is desired, the electric motor 24 is switched on and drives the additional compressor 26. This sucks in refrigerant via its intake line 36 and compresses the refrigerant that flows to the condenser 14. The parallel connection of compressor 12 and additional compressor 26 makes it possible to operate the refrigerant circuit only with the additional compressor 26. The auxiliary compressor 26 is lubricated by the oil carried in the refrigerant vapor and further by the fact that the motor 24 sprays oil from the oil sump 30 in the capsule 22, so that an oil mist forms in part and some oil is transported directly to the desired locations on the auxiliary compressor 26 ,
Anstelle des vollhermetischen Kompressors kann auch ein halbhermetischer Kompressor (Figur 2) vorgesehen sein, der aus einem oberen und einem unteren Gehäuseteil 50, 52 zusammengesetzt ist, die aneinander angeflanscht sind und über Schrauben 54 lösbar miteinander verbunden werden.Instead of the fully hermetic compressor, a semi-hermetic compressor (FIG. 2) can also be provided, which is composed of an upper and a lower housing part 50, 52 which are flanged together and releasably connected to one another by means of screws 54.
In der Kapsel 22 ist optional ein Trockner 56 untergebracht. Die halbhermetische Ausführung kann auch allein darin bestehen, daß ein Deckel, eine Kappe oder eine Patrone zum Austausche eines Trocknermaterials des Trockners gelöst, z. B. abgeschraubt werden kann. BezugszeichenlisteA dryer 56 is optionally accommodated in the capsule 22. The semi-hermetic version can also consist solely in that a lid, a cap or a cartridge for exchanging a dryer material of the dryer is loosened, e.g. B. can be unscrewed. LIST OF REFERENCE NUMBERS
: Verbrennungsmotor : Kompressor : Verflüssiger : Expansionsvorrichtung : Verdampfer : Flüssigkeitsabscheider : Kapsel : Elektromotor : Zusatzkompressor : Ölsumpf : Syphonrohr : freies Ende : Ansaugleitung : Verdampfergebläse : oberes Gehäuseteil : unteres Gehäuseteil : Schrauben : Trockner : Combustion engine: Compressor: Condenser: Expansion device: Evaporator: Liquid separator: Capsule: Electric motor: Additional compressor: Oil sump: Siphon tube: Free end: Intake line: Evaporator fan: Upper housing part: Lower housing part: Screws: dryer
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU23498/01A AU2349801A (en) | 1999-11-25 | 2000-11-11 | Coolant circuit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19956816.2 | 1999-11-25 | ||
| DE19956816A DE19956816A1 (en) | 1999-11-25 | 1999-11-25 | Refrigerant circulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001038116A1 true WO2001038116A1 (en) | 2001-05-31 |
Family
ID=7930339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2000/004016 Ceased WO2001038116A1 (en) | 1999-11-25 | 2000-11-11 | Coolant circuit |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU2349801A (en) |
| DE (1) | DE19956816A1 (en) |
| WO (1) | WO2001038116A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004014847A1 (en) * | 2003-07-23 | 2005-03-24 | Behr Gmbh & Co. Kg | Vehicle air conditioner operating when vehicle is stationery or idling, has separate, second compressor controlled independently of first compressor |
| WO2017083905A1 (en) * | 2015-11-19 | 2017-05-26 | Sigma Air Conditioning Pty Ltd | Vehicular air conditioning systems |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10145028A1 (en) * | 2001-09-13 | 2003-04-03 | Behr Gmbh & Co | Refrigeration system, in particular refrigeration cycle system for the air conditioning of a vehicle, and cooling device for use in such a refrigeration system |
| CN114211937A (en) * | 2021-12-07 | 2022-03-22 | 青岛海尔空调器有限总公司 | Vehicle-mounted air conditioning unit and vehicle |
| CN114312209B (en) * | 2021-12-07 | 2025-09-16 | 青岛海尔空调器有限总公司 | Vehicle-mounted air conditioning unit and control method thereof |
| CN114312210B (en) * | 2021-12-07 | 2025-09-16 | 青岛海尔空调器有限总公司 | Vehicle-mounted air conditioning unit and control method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5226294A (en) * | 1992-04-28 | 1993-07-13 | Thermo King Corporation | Compressor arrangement suitable for transport refrigeration systems |
| US5435144A (en) * | 1994-02-24 | 1995-07-25 | Kalmbach; John | Compressor lubricant distributing system for motor vehicles having auxiliary air conditioning |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3545013A1 (en) * | 1985-12-19 | 1986-12-18 | Audi AG, 8070 Ingolstadt | Refrigeration system, in particular air-conditioning system for passenger vehicles |
| DE4102297A1 (en) * | 1991-01-26 | 1992-07-30 | Audi Ag | DEVICE FOR ELIMINATING LIQUID BLOWS IN AN AGGREGATE |
| DE4414547A1 (en) * | 1994-04-26 | 1995-11-02 | Konvekta Ag | Automobile air-conditioning system |
-
1999
- 1999-11-25 DE DE19956816A patent/DE19956816A1/en not_active Ceased
-
2000
- 2000-11-11 AU AU23498/01A patent/AU2349801A/en not_active Abandoned
- 2000-11-11 WO PCT/DE2000/004016 patent/WO2001038116A1/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5226294A (en) * | 1992-04-28 | 1993-07-13 | Thermo King Corporation | Compressor arrangement suitable for transport refrigeration systems |
| US5435144A (en) * | 1994-02-24 | 1995-07-25 | Kalmbach; John | Compressor lubricant distributing system for motor vehicles having auxiliary air conditioning |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004014847A1 (en) * | 2003-07-23 | 2005-03-24 | Behr Gmbh & Co. Kg | Vehicle air conditioner operating when vehicle is stationery or idling, has separate, second compressor controlled independently of first compressor |
| DE102004014847B4 (en) | 2003-07-23 | 2020-01-09 | Mahle International Gmbh | Device for air conditioning a vehicle |
| WO2017083905A1 (en) * | 2015-11-19 | 2017-05-26 | Sigma Air Conditioning Pty Ltd | Vehicular air conditioning systems |
| CN108778799A (en) * | 2015-11-19 | 2018-11-09 | 西格玛空调有限公司 | Vehicle air conditioner |
| US20190101313A1 (en) * | 2015-11-19 | 2019-04-04 | Sigma Air Conditioning Pty Ltd | Vehicular air conditioning systems |
| EP3377345A4 (en) * | 2015-11-19 | 2019-08-07 | Sigma Air Conditioning Pty Ltd | Vehicular air conditioning systems |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2349801A (en) | 2001-06-04 |
| DE19956816A1 (en) | 2001-06-07 |
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