DE10306394A1 - Refrigerant circuit with a regulated swash plate compressor - Google Patents
Refrigerant circuit with a regulated swash plate compressor Download PDFInfo
- Publication number
- DE10306394A1 DE10306394A1 DE10306394A DE10306394A DE10306394A1 DE 10306394 A1 DE10306394 A1 DE 10306394A1 DE 10306394 A DE10306394 A DE 10306394A DE 10306394 A DE10306394 A DE 10306394A DE 10306394 A1 DE10306394 A1 DE 10306394A1
- Authority
- DE
- Germany
- Prior art keywords
- refrigerant
- swash plate
- pressure
- control valve
- compressor
- 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.)
- Withdrawn
Links
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
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B27/1804—Controlled by crankcase pressure
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B27/1804—Controlled by crankcase pressure
- F04B2027/184—Valve controlling parameter
- F04B2027/1854—External parameters
-
- 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
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
- F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
-
- 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
- F25B2600/02—Compressor control
- F25B2600/023—Compressor control controlling swash plate angles
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1933—Suction pressures
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
- F25B2700/21174—Temperatures of an evaporator of the refrigerant at the inlet of the evaporator
-
- 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
- F25B40/00—Subcoolers, desuperheaters or superheaters
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
Die Erfindung betrifft einen Kältemittelkreislauf mit einem geregelten Taumelscheibenkompressor, bei dem das Kältemittel nacheinander den Taumelscheibenkompressor, einen Kältemittelkühler als Kältemittelverflüssiger, ein den Kältemittelfluß regelndes Expansionsorgan und einen Verdampfer, die jeweils durch eine Kältemittelleitung miteinander verbunden sind, durchströmt. Sie löst die Aufgabe, den Kältemittelkreislauf und die Kreislaufführung alternativ und auf einfache Weise zu regeln. Dazu ist das Regelventil (8) ein 3-Wege-Regelventil mit einem Saugdruck- (8.1), einem Hochdruck- (8.2) und einem Kurbelkammeranschluß (8.3), vor dem Eingang des Verdampfers (6) ist ein Temperaturfühler oder in der Saugleitung vor dem Taumelscheibenkompressor (1) ein Drucksensor angeordnet, der über eine Regelelektronik (9) mit dem Stellantrieb (8.4) des Regelventils (8) in Wirkverbindung steht, und die neigungsverstellbare Taumelscheibe des Taumelscheibenkompressors (1), das Regelventil (8) und der Temperaturfühler (10) bzw. der Drucksensor bilden einen Saugdruckregelkreis aus.The invention relates to a refrigerant circuit with a regulated swash plate compressor, in which the refrigerant flows through the swash plate compressor in succession, a refrigerant cooler as a refrigerant condenser, an expansion element regulating the refrigerant flow and an evaporator, which are each connected to one another by a refrigerant line. It solves the task of regulating the refrigerant circuit and the circuit management alternatively and in a simple manner. For this purpose, the control valve (8) is a 3-way control valve with a suction pressure (8.1), a high pressure (8.2) and a crank chamber connection (8.3), in front of the inlet of the evaporator (6) there is a temperature sensor or in the suction line the swash plate compressor (1) is arranged with a pressure sensor, which is connected via control electronics (9) to the actuator (8.4) of the control valve (8), and the tilt-adjustable swash plate of the swash plate compressor (1), the control valve (8) and the temperature sensor ( 10) or the pressure sensor form a suction pressure control circuit.
Description
Die Erfindung betrifft einen Kältemittelkreislauf mit einem geregelten Taumelscheibenkompressor, insbesondere für eine mit dem Kältemittel R744 (CO2-Kältemittel) betriebene Kfz-Klimaanlage.The invention relates to a refrigerant circuit with a regulated swash plate compressor, in particular for a motor vehicle air conditioning system operated with the refrigerant R744 (CO 2 refrigerant).
In Kfz-Klimaanlagen wird die Luft, die der Fahrgastzelle zugeführt wird, an einem Wärmetauscher (Verdampfer) gekühlt, wobei das in diesen geleitete Kältemittel verdampft und die dafür erforderliche Wärmemenge der vorbeiströmenden Luft entzieht. In einem Kreisprozeß wird das Kältemittel durch Zustandsänderungen aufbereitet, so daß für das Kühlen der Luft eine begrenzte Kältemittelmenge ausreicht. In einem zweiten Wärmetauscher, dem Gaskühler oder Kondensator (Kältemittelvertlüssiger), wird dem Kältemittel die im Verdampfer zugeführte Wärmemenge durch Außenluft wieder entzogen, wozu zwischen dem Kältemittel und der Außenluft eine Temperaturdifferenz herrschen muß. Daher wird das gasförmige Kältemittel in einem Kompressor verdichtet und in seiner Temperatur erhöht, bevor es in den Gaskühler geleitet und dort verflüssigt wird. Zwischen dem Verdampfer und dem Gaskühler ist des weiteren ein Expansionsorgan angeordnet, um das im Kompressor verdichtete und somit mit einem höheren Druck und mit einer höheren Temperatur versehene Kältemittel wieder zu entspannen und um den Kältemittelfluß zu regeln. Kompressor und Expansionsventil trennen den Kältemittelkreislauf in einen Hochdruck- und einen Niederdruckbereich. Üblicherweise befindet sich im Hochdruckbereich, also im Bereich des verdichteten Kältemittels zwischen dem Kompressor und dem Expansionsorgan auch ein Kältemittelsammler, in dem das stark hygroskopische Kältemittel getrocknet wird, um Korrossionsschäden im Verdichter zu vermeiden.In automotive air conditioning systems, the air the supplied to the passenger compartment is on a heat exchanger (Evaporator) cooled, where the refrigerant conducted in this evaporates and the for it required amount of heat the flowing past Deprives air. The refrigerant is removed in a cycle state changes processed so that for cooling the Air a sufficient amount of refrigerant is sufficient. In a second heat exchanger, the gas cooler or condenser (refrigerant liquefier), becomes the refrigerant the supplied in the evaporator heat through outside air withdrawn again, for which purpose between the refrigerant and the outside air there must be a temperature difference. Therefore, the gaseous refrigerant compressed in a compressor and raised in temperature before it in the gas cooler passed and liquefied there becomes. There is also an expansion element between the evaporator and the gas cooler arranged to be compressed in the compressor and thus with a higher pressure and with a higher one Refrigerant with temperature to relax again and to regulate the refrigerant flow. The compressor and expansion valve separate the refrigerant circuit into one High pressure and a low pressure area. Usually located in the high pressure area, i.e. in the area of the compressed refrigerant also a refrigerant collector between the compressor and the expansion device, in which the highly hygroscopic refrigerant is dried, about corrosion damage to avoid in the compressor.
In Kraftfahrzeug-Klimaanlagen werden
in der Regel Taumelscheibenkompressoren (Kompressoren) eingesetzt.
Bei einem in der
Wegen der schnellen Änderung
der Betriebsbedingungen infolge der Fahrzeugbewegung mit wechselnden
Fahrgeschwindigkeiten und unterschiedlichem Wärmeeinfall unterliegt der Kältebedarf großen Schwankungen,
an den sich die Kälteleistung des
Kompressors anpassen muß.
In der
Es ist Aufgabe der Erfindung, einen Kältemittelkreislauf mit einem geregelten Taumelscheibenkompressor nach dem Oberbegriff des Anspruchs 1 alternativ und auf einfache Weise zu regeln.It is an object of the invention, one Refrigerant circulation with a regulated swash plate compressor according to the generic term of claim 1 alternatively and in a simple manner.
Diese Aufgabe wird bei einem Kältemittelkreislauf nach dem Oberbegriff des Anspruchs 1 durch dessen kennzeichnende Merkmale und ein Verfahren mit den Merkmalen des Anspruchs 7 gelöst.This task is done in a refrigerant cycle according to the preamble of claim 1 by its characterizing Features and a method with the features of claim 7 solved.
Der vorgeschlagene Kältemittelkreislauf besteht aus einem Taumelscheibenkompressor (Kompressor), an dessen Ausgang ein Hochdruckabschnitt mit einem Gaskühler oder Kältemittelvertlüssiger und an dessen Saugseite (Kompressoreingang) ein Niederdruckabschnitt mit einem Verdampfer angeschlossen sind, und einem den Hochdruckabschnitt mit dem Niederdruckabschnitt verbindenden regelbaren Expansionsorgan, die jeweils durch eine Kältemittelleitung miteinander verbunden sind, sowie einem Regelventil an der Saugseite des Kompressors, über das das Kältemittel wieder in diesen gesaugt wird, wobei vor dem Eingang des Verdampfers ein Temperatursensor oder in der Saugleitung vor dem Kompressor ein Drucksensor angeordnet ist, der über eine Regelelektronik mit dem Stellantrieb des Regelventils in Wirkverbindung steht, und daß die neigungsverstellbare Taumelscheibe, das Regelventil und der jeweilige Sensor einen Saugdruckregelkreis ausbilden. Das Regelventil ist ein 3-Wege-Ventil mit einem Saugdruck-, einem Hochdruck- und einem Kurbelkammeranschluß. Der Temperatursensor mißt dabei die Sättigungstemperatur am Verdampfereingang, aus der über die in einer Regelelektronik abgelegte Dampfdruckkurve des jeweiligen Kältemittels der Verdampferdruck und damit auch der Saugdruck bestimmt wird. Damit entfällt eine komplizierte und aufwändige Regelung mit mehreren Sensoren. Bevorzugt wird anstelle eines Drucksensors in der Saugleitung des Kompressors ein Temperatursensor vor dem Verdampfereingang eingesetzt, da dieser kostengünstiger ist. Die Regelstrategie sieht dabei vor, den Saugdruck unabhängig von der Drehzahl des Kompressors konstant zu halten. Das heißt, daß der Kolbenhub bei hohen Motor- und damit Kompressordrehzahlen klein und bei Leerlauf maximal ist. Der auf diese Weise geregelte Kältemittelkreilauf ermöglicht eine schnelle Anpassung der Kompressorleistung an die jeweilige Kälteanforderung.The proposed refrigerant circuit consists of a swash plate compressor (compressor), at the output of which a high-pressure section with a gas cooler or refrigerant-releaser and on the suction side (compressor inlet) of a low-pressure section with an evaporator are connected, and an adjustable expansion element connecting the high-pressure section to the low-pressure section, each by a refrigerant line are connected to each other, and a control valve on the suction side of the compressor, via which the refrigerant is sucked back into it, a temperature sensor being arranged in front of the inlet of the evaporator or a pressure sensor in the suction line in front of the compressor, which is connected to the control electronics the actuator of the control valve is in operative connection, and that the inclinable swash plate, the control valve and the respective sensor form a suction pressure control circuit. The control valve is a 3-way valve with a suction pressure, a high pressure and a crank chamber connection. The temperature sensor measures the saturation temperature at the evaporator inlet, from which the evaporator pressure and thus also the suction pressure are determined via the vapor pressure curve of the respective refrigerant stored in control electronics. This eliminates the need for a complicated and time-consuming regulation with several sensors sors. Instead of a pressure sensor in the suction line of the compressor, a temperature sensor is preferably used in front of the evaporator inlet, since this is less expensive. The control strategy provides to keep the suction pressure constant regardless of the speed of the compressor. This means that the piston stroke is small at high engine and thus compressor speeds and is maximum when idling. The refrigerant circuit controlled in this way enables the compressor capacity to be quickly adapted to the respective refrigeration requirement.
Das Regelventil ist bevorzugt ein pulsbreitenmoduliertes 3-Wege-Ventil mit einem elektromagnetischen Stellantrieb, der eine kurze Reaktionszeit hat.The control valve is preferably a pulse width modulated 3-way valve with an electromagnetic Actuator that has a short response time.
In der Ausgangsleitung des Kältemittelverflüssigers kann ein innerer Wärmetauscher mit der Saugleitung des Kompressors gebildet sein, durch den das unter Hochdruck stehende gekühlte Kältemittel zum Expansionsorgan und das entspannte und dampfförmige Kältemittel zum Kompressor geleitet werden, so daß eine Abkühlung des zu entspannenden und zu verdampfenden Kältemittels erfolgt, mit der Konsequenz, daß der Flüssigkeitsanteil des Kältemittels nach der Expansion steigt und somit mehr flüssiges Kältemittel zur Verfügung steht. Der innere Wärmetauscher erhöht damit die Kälteleistung und auch die Effizienz des Kältekreislaufs. Aber auch wegen der schnellen Änderung der Betriebsbedingungen ist ein innerer Wärmetauscher vorteilhaft. Diese Ausführung mit einem inneren Wärmetauscher eignet sich insbesondere für CO2-Kältemittel.An internal heat exchanger with the suction line of the compressor can be formed in the outlet line of the refrigerant condenser, through which the high-pressure cooled refrigerant is led to the expansion element and the expanded and vaporous refrigerant is led to the compressor, so that the refrigerant to be expanded and evaporated is cooled , with the consequence that the liquid portion of the refrigerant increases after the expansion and thus more liquid refrigerant is available. The internal heat exchanger thus increases the cooling capacity and also the efficiency of the cooling circuit. An internal heat exchanger is also advantageous because of the rapid change in operating conditions. This version with an internal heat exchanger is particularly suitable for CO 2 refrigerants.
Als Expansionsorgan wird vorteilhafterweise ein themostatisches Expansionsventil eingesetzt. Im Anfahrzustand der Klimaanlage ist die Überhitzung am Verdampferausgang erhöht, so daß das Expansionsventil weit öffnet und der Kältemittelmassenstrom erhöht wird, wodurch in kürzester Zeit die maximale Kälteleistung erreicht wird.A is advantageously used as an expansion element thematic expansion valve used. When starting the Air conditioning is the overheating at the evaporator outlet elevated, so that Expansion valve opens wide and the refrigerant mass flow is increased, whereby in the shortest possible time Time the maximum cooling capacity is achieved.
Die Erfindung wird nachstehend anhand eines Ausführungsbeispiels für eine insbesondere mit CO2-Kältemittel betriebene Kraftfahrzeug-Klimaanlage erläutert. Die zugehörigen Zeichnungen zeigen:The invention is explained below using an exemplary embodiment of a motor vehicle air conditioning system operated in particular with CO 2 refrigerant. The associated drawings show:
Dieser Kältemittelkreislauf weist in
Kreislaufrichtung nacheinander einen Taumelscheibenkompressor
Das CO2-Kältemittel,
das auf der Saugseite des Kompressors
Am Verdampfereingang liegt gesättigter CO2-Naßdampf
vor, dessen Sättigungstemperatur von
der Leistung des Kompressors
Über
das Regelventil
- 11
- Kompressorcompressor
- 22
- Gaskühlergas cooler
- 33
- Wärmetauscherheat exchangers
- 3.13.1
- Kältemittel-LeitungsschlangeRefrigerant piping snake
- 3.23.2
- Kältemittel-LeitungsschlangeRefrigerant piping snake
- 44
- Expansionsventilexpansion valve
- 55
- Sensorsensor
- 66
- VerdampferEvaporator
- 77
- Flüssigkeitssammlerliquid receiver
- 88th
- 3-Wege-Regelventil3-way control valve
- 8.18.1
- Saugkammer-AnschlußSuction port
- 8.28.2
- Hochdruckkammer-AnschlußHigh-pressure chamber connection
- 8.38.3
- Kurbelkammer-AnschlußCrank chamber connection
- 8.48.4
- Stellgliedactuator
- 99
- Regelelektronikcontrol electronics
- 1010
- Temperatursensortemperature sensor
Claims (9)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10306394A DE10306394A1 (en) | 2003-02-15 | 2003-02-15 | Refrigerant circuit with a regulated swash plate compressor |
EP04000690A EP1450041A1 (en) | 2003-02-15 | 2004-01-15 | Refrigerant circuit with a controlled swash-plate type compressor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10306394A DE10306394A1 (en) | 2003-02-15 | 2003-02-15 | Refrigerant circuit with a regulated swash plate compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10306394A1 true DE10306394A1 (en) | 2004-08-26 |
Family
ID=32731018
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10306394A Withdrawn DE10306394A1 (en) | 2003-02-15 | 2003-02-15 | Refrigerant circuit with a regulated swash plate compressor |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1450041A1 (en) |
DE (1) | DE10306394A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102261773A (en) * | 2010-05-24 | 2011-11-30 | 上海日立电器有限公司 | Heat pump water heater system |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3822465C2 (en) * | 1987-07-04 | 1991-09-19 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi, Jp | |
DE4139186A1 (en) * | 1990-11-29 | 1992-06-04 | Toyoda Automatic Loom Works | PISTON CONNECTING MECHANISM FOR A SWASH DISC COMPRESSOR |
DE3843924C2 (en) * | 1987-12-28 | 1992-06-11 | Diesel Kiki Co., Ltd., Tokio/Tokyo, Jp | |
EP0424474B2 (en) * | 1989-01-09 | 1997-11-19 | Sinvent A/S | Method of operating a vapour compression cycle under trans- or supercritical conditions |
CH690189A5 (en) * | 1995-03-10 | 2000-05-31 | Daimler Benz Ag | A method for controlling the power of a system for cooling the passenger compartment of a motor vehicle. |
DE10135727A1 (en) * | 2001-07-21 | 2003-02-06 | Volkswagen Ag | control valve |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH689826A5 (en) * | 1995-05-10 | 1999-12-15 | Daimler Benz Ag | Vehicle air conditioner. |
JP3432995B2 (en) * | 1996-04-01 | 2003-08-04 | 株式会社豊田自動織機 | Control valve for variable displacement compressor |
JP4075129B2 (en) * | 1998-04-16 | 2008-04-16 | 株式会社豊田自動織機 | Control method of cooling device |
JP2001193662A (en) * | 2000-01-07 | 2001-07-17 | Toyota Autom Loom Works Ltd | Control device of variable displacement compressor |
-
2003
- 2003-02-15 DE DE10306394A patent/DE10306394A1/en not_active Withdrawn
-
2004
- 2004-01-15 EP EP04000690A patent/EP1450041A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3822465C2 (en) * | 1987-07-04 | 1991-09-19 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi, Jp | |
DE3843924C2 (en) * | 1987-12-28 | 1992-06-11 | Diesel Kiki Co., Ltd., Tokio/Tokyo, Jp | |
EP0424474B2 (en) * | 1989-01-09 | 1997-11-19 | Sinvent A/S | Method of operating a vapour compression cycle under trans- or supercritical conditions |
DE4139186A1 (en) * | 1990-11-29 | 1992-06-04 | Toyoda Automatic Loom Works | PISTON CONNECTING MECHANISM FOR A SWASH DISC COMPRESSOR |
CH690189A5 (en) * | 1995-03-10 | 2000-05-31 | Daimler Benz Ag | A method for controlling the power of a system for cooling the passenger compartment of a motor vehicle. |
DE10135727A1 (en) * | 2001-07-21 | 2003-02-06 | Volkswagen Ag | control valve |
Also Published As
Publication number | Publication date |
---|---|
EP1450041A1 (en) | 2004-08-25 |
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