DE102006001919A1 - Coolant circuit for air conditioning system, has coolant storage arranged in high pressure side and connected with valve to maintain coolant flow via evaporator till pressure is compensated with suction side of compressor - Google Patents

Coolant circuit for air conditioning system, has coolant storage arranged in high pressure side and connected with valve to maintain coolant flow via evaporator till pressure is compensated with suction side of compressor Download PDF

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Publication number
DE102006001919A1
DE102006001919A1 DE102006001919A DE102006001919A DE102006001919A1 DE 102006001919 A1 DE102006001919 A1 DE 102006001919A1 DE 102006001919 A DE102006001919 A DE 102006001919A DE 102006001919 A DE102006001919 A DE 102006001919A DE 102006001919 A1 DE102006001919 A1 DE 102006001919A1
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Germany
Prior art keywords
refrigerant
compressor
coolant
evaporator
storage
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DE102006001919A
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German (de)
Inventor
Ulrich Fochler
Horst Achim Schröter
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Volkswagen AG
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Volkswagen AG
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Priority to DE102006001919A priority Critical patent/DE102006001919A1/en
Publication of DE102006001919A1 publication Critical patent/DE102006001919A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • 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
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • B60H1/00764—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a vehicle driving condition, e.g. speed
    • B60H1/00778—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being a vehicle driving condition, e.g. speed the input being a stationary vehicle position, e.g. parking or stopping
    • 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
    • B60H1/3205—Control means therefor
    • B60H1/3208—Vehicle drive related control of the compressor drive means, e.g. for fuel saving purposes
    • 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
    • B60H1/3229—Cooling devices using compression characterised by constructional features, e.g. housings, mountings, conversion systems
    • 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
    • B60H2001/3236—Cooling devices information from a variable is obtained
    • B60H2001/3266—Cooling devices information from a variable is obtained related to the operation of the vehicle
    • 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
    • B60H2001/3286—Constructional features
    • B60H2001/3295—Compressing means other than compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • 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
    • F25B2400/16—Receivers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/27—Problems to be solved characterised by the stop of the refrigeration cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2523—Receiver valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/22—Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The circuit has a compressor (1) driven by a motor of a vehicle, a coolant condenser (2) connected with an output of the compressor, and an expansion valve (3) regulating a coolant flow. An evaporator (4) is connected with the expansion valve and an input of the compressor and cooling lines. A coolant storage (5) is arranged in a high pressure side and connected with the expansion valve to maintain the coolant flow via the evaporator till pressure is compensated with a suction side of the compressor.

Description

Die Erfindung betrifft einen Kältemittel-Kreislauf für eine Klimaanlage in einem Kraftfahrzeug, bei dem der Kältemittelfluss durch einen vom Fahrzeugmotor angetriebenen Kompressor erzeugt wird.The The invention relates to a refrigerant circuit for one Air conditioning in a motor vehicle, wherein the refrigerant flow is generated by a compressor driven by the vehicle engine.

Eine Klimaanlage in einem Fahrzeug weist einen dem Kompressor nachgeschalteten Kältemittelkühler, der in Abhängigkeit vom eingesetzten Kältemittel als Gaskühler oder Kondensator fungiert, ein den Kältemittelfluss regelndes Expansionsorgan und einen mit diesem und der Eingangsseite des Kompressors verbundenen Verdampfer sowie diese Komponenten verbindende Kältemittelleitungen auf. Da der Kältemittelfluss durch den vom Fahrzeugmotor angetriebenen Kompressor erzeugt wird, kommt dieser zum Erliegen, sobald der Fahrzeugmotor abgeschaltet wird, z.B. bei vorübergehendem Stillstand des Fahrzeugs beim Halten an einer Ampel (idle-stop-Betrieb). Die Klimaanlage soll jedoch in der Lage sein, den Fahrzeuginnenraum auch bei abgeschaltetem Fahrzeugmotor zumindest anfänglich und vorübergehend zu klimatisieren.A Air conditioning in a vehicle has a compressor downstream Refrigerant cooler, the dependent on of the refrigerant used as a gas cooler or condenser, a refrigerant flow regulating expansion organ and one connected to this and the input side of the compressor Evaporator and these components connecting refrigerant pipes. Since the Refrigerant flow is generated by the compressor driven by the vehicle engine, this comes to a halt as soon as the vehicle engine is switched off is, e.g. at temporary Standstill of the vehicle while stopping at a traffic light (idle-stop operation). However, the air conditioning should be able to the vehicle interior even when the vehicle engine is at least initially and temporarily to air-condition.

Zur Lösung des Problems beschreibt die DE 103 42 110 A1 einen Kältemittel-Kreislauf mit mindestens einem Kältemittelsammler und einer Druckabsenkungsvorrichtung vorgesehen, die eine Druckabsenkung im Falle eines Kompressorstillstandes bewirkt. Diese kann so gestaltet sein, dass sie den Kältemittelsammler aufweist, und ist vorteilhaft vor und/oder direkt nach dem Verdampfer angeordnet und/oder in diesen integriert. Die Verdampfung im Verdampfer geht auch bei einem Motorstop weiterhin vonstatten. Dabei wird das Problem des durch die anhaltende Verdampfung des Kältemittels im Verdampfer ansteigenden Druckes durch das Vorsehen mindestens eines Kältemittelsammlers, der als Druckabsenkungsvorrichtung dient, gelöst, in dem sich gasförmiges Kältemittel sammelt und kondensiert, so dass sich das Volumen verringert und dadurch der Druck absinkt.To solve the problem describes the DE 103 42 110 A1 a refrigerant circuit with at least one refrigerant collector and a pressure reduction device provided, which causes a pressure drop in the event of a compressor standstill. This can be designed so that it has the refrigerant collector, and is advantageously arranged before and / or directly after the evaporator and / or integrated into it. The evaporation in the evaporator continues to take place even when the engine stops. In this case, the problem of rising by the continued evaporation of the refrigerant in the evaporator pressure by the provision of at least one refrigerant collector, which serves as a pressure reduction device solved in which gaseous refrigerant collects and condenses, so that the volume decreases and thereby the pressure drops.

In der DE 101 56 944 A1 ist vorgeschlagen, zusätzlich zu dem ersten Verdampfer einen zweiten Verdampfer zum Abkühlen der Luft vorzusehen, der zusätzlich ein Kältespeichermedium enthält, wobei die zu konditionierende Luft wahlweise durch jeden Verdampfer einzeln oder durch beide Verdampfer gemeinsam leitbar ist. Der zweite Verdampfer kann beladen werden, wenn ausreichend Kälteleistung zur Verfügung steht, und kann dann die Luft bei Kompressorstillstand abkühlen. Alternativ dazu ist nur ein Verdampfer angeordnet, der zwei Teilbereiche enthält, von denen einer ein Kältespeichermedium enthält, wobei die zu konditionierende Luft wahlweise durch jeden Teilbereich einzeln oder durch beide Teilbereiche gemeinsam leitbar ist.In the DE 101 56 944 A1 It is proposed to provide, in addition to the first evaporator, a second evaporator for cooling the air, which additionally contains a cold storage medium, the air to be conditioned being selectively controllable either individually by each evaporator or by both evaporators. The second evaporator can be charged if sufficient refrigeration capacity is available, and then can cool the air when the compressor is at a standstill. Alternatively, only one evaporator is arranged, which contains two subregions, one of which contains a cold storage medium, wherein the air to be conditioned is selectively conductive by each subsection individually or by both subregions.

Aufgabe der Erfindung ist es, einen Kältemittel-Kreislauf für eine Klimaanlage in einem Kraftfahrzeug nach dem Oberbegriff des Anspruchs 1 so zu gestalten, dass bei eingeschalteter Klimaanlage und Kompressorstillstand anfänglich weiterhin Kältemittel durch den Verdampfer strömt.task The invention is a refrigerant cycle for one Air conditioning in a motor vehicle according to the preamble of the claim 1 so that when the air conditioning and compressor shutdown initially Continue to run through refrigerant the evaporator flows.

Diese Aufgabe wird bei einem Kältemittelkreislauf nach dem Oberbegriff des Anspruchs 1 durch dessen kennzeichnende Merkmale gelöst. Vorteilhafte Ausgestaltungen sind in den Unteransprüchen aufgeführt.These Task is in a refrigerant circuit according to the preamble of claim 1 by the characterizing Characteristics solved. Advantageous embodiments are listed in the subclaims.

Die Erfindung besteht darin, dass bei einer Klimaanlage für ein Kraftfahrzeug mit einem einen Kältemittelkreislauf bildenden Kompressor, der durch den Fahrzeugmotor angetrieben wird, einem Kältemittelkühler, einem Expansionsorgan und einem Verdampfer, hochdruckseitig ein Kältemittelspeicher für komprimiertes Kältemittel angeordnet ist. Dieser ist aus dem Kreislauf speisbar und mit der Hochdruckseite des Expansionsorganes verbindbar. Bei Kompressorstillstand und geforderter Kälteleistung wird der Kältemittelspeicher mit dem Expansionsorgan verbunden, so dass das in diesem gespeicherte Kältemittel anfänglich einen Kältemittelfluss über den Verdampfer aufrechterhält, bis der Druck zwischen dem Kältemittelspeicher und dem Kompressoreingang ausgeglichen ist. Dieser Kältemittelspeicher kann vorteilhaft auch zur Abfederung von Spitzenlasten herangezogen werden. Zudem verbessert dieser das Ansprechverhalten der Klimaanlage bei spontanem Kälteenergiebedarf, da verdichtetes Kältemittel sofort zur Verfügung steht. Überdies kann der Kältemittelspeicher auch zur Verkleinerung der Komponenten der Klimaanlage und zur Reduzierung des Kraftstoffverbrauchs beitragen.The Invention is that in an air conditioner for a motor vehicle with a refrigerant circuit forming compressor driven by the vehicle engine, a refrigerant radiator, a Expansion element and an evaporator, high-pressure side, a refrigerant reservoir for compressed refrigerant is arranged. This is fed from the circulation and with the High pressure side of the expansion organ connectable. At compressor shutdown and required cooling capacity becomes the refrigerant reservoir connected to the expansion organ, so that stored in this refrigerant initially a refrigerant flow through the evaporator maintains, until the pressure between the refrigerant reservoir and the compressor input is balanced. This refrigerant storage can be used advantageously also for cushioning peak loads. In addition, this improves the response of the air conditioner spontaneous cooling energy demand, because compressed refrigerant immediately to disposal stands. moreover can the refrigerant storage also for the reduction of the components of the air conditioner and for the reduction contribute to fuel consumption.

Der Kältemittelspeicher ist dabei in einer an die Hochdruckseite des Expansionsorgans gekoppelten Abzweig- oder in einer Neben- bzw. Parallelleitung angeordnet, über die in Verbindung mit steuerbaren Absperrorganen die Speisung und Entleerung desselben ermöglicht ist.Of the Refrigerant storage is in a coupled to the high pressure side of the expansion device Branch or arranged in a secondary or parallel line over the in connection with controllable shut-off valves the feeding and emptying of the same allows is.

Zur Wirkungsverbesserung der Klimaanlage ist es von Vorteil, wenn auf der Niederdruckseite in einer Abzweig- oder in einer Neben- bzw. Parallelleitung zwischen dem Verdampfer und dem Eingang des Kompressors ein Kältemittelspeicher für entspanntes Kältemittel angeordnet ist, der bei Öffnung des Kältemittelspeichers für komprimiertes Kältemittel geöffnet und bis zu einem Druckausgleich befüllbar ist. Je größer das Volumen dieses zusätzlichen Kältemittelspeichers ist, desto länger kann bei Kompressorstillstand ein Kältemittelfluss über den Verdampfer aufrechterhalten werden. Zur Zu- und Abschaltung des Kältemittelspeichers sind ebenfalls steuerbare Absperrorgane in die Kältemittelleitungen integriert.to Impact improvement of the air conditioner it is beneficial when on the low-pressure side in a branch or in a side or Parallel line between the evaporator and the inlet of the compressor a refrigerant reservoir for relaxed refrigerant is arranged at the opening of the Refrigerant memory for compressed refrigerant open and can be filled up to a pressure equalization. The bigger that Volume of this additional refrigerant storage is, the longer At compressor shutdown, a refrigerant flow over the Evaporator be maintained. To connect and disconnect the Refrigerant memory are also controllable shut-off valves integrated into the refrigerant pipes.

Die Erfindung wird nachstehend anhand eines Ausführungsbeispiels erläutert. Die zugehörige Zeichnung zeigt einen Kältemittel-Kreislauf für eine Klimaanlage in einem Kraftfahrzeug.The Invention will be explained below with reference to an embodiment. The associated drawing shows a refrigerant circuit for an air conditioner in a motor vehicle.

Dieser in 1 dargestellte Kältemittel-Kreislauf weist nacheinander, jeweils über eine Kältemittelleitung L miteinander verbunden, einen vom Fahrzeugmotor angetriebenen Kompressor 1, einen Kältemittelkühler 2, ein Expansionsventil 3 und einen Verdampfer 4 auf, der mit der Saugseite des Kompressors 1 verbunden ist, sowie einen in einer Nebenleitung L1 zwischen dem Kältemittelkühler 2 und der Hochdruckseite des Expansionsventils 3 angeordneten Kältemittelspeicher 5 mit einem Volumen von 1 dm2 zur Speicherung von etwa 1 kg komprimierten Kältemittels mit einem Druck von 15 bar und einen in einer Nebenleitung L2 zwischen dem Verdampfer 4 und der Saugseite des Kompressors 1 angeordneten Kältemittelspeicher 6 für entspanntes Kältemittel auf. Dieser (6) hat gegenüber dem Kältemittelspeicher 5 ein erheblich größeres Volumen von 70 dm2. In der Nebenleitung L1 sind vor und hinter dem Kältemittelspeicher 5 steuerbare Absperrventile A1 und A2 angeordnet und in der Nebenleitung L2 steuerbare Absperrventile A5 und A6. Zudem sind jeweils in dem Abschnitt der Kältemittelleitung, der von der jeweiligen Nebenleitung L1 bzw. L2 überbrückt wird, Absperrventile A3 und A4 bzw. A7 und A8 angeordnet.This in 1 shown refrigerant circuit has successively connected to each other via a refrigerant line L, a driven by the vehicle engine compressor 1 , a refrigerant cooler 2 , an expansion valve 3 and an evaporator 4 on that with the suction side of the compressor 1 is connected, and one in a sub-line L1 between the refrigerant radiator 2 and the high pressure side of the expansion valve 3 arranged refrigerant accumulator 5 with a volume of 1 dm 2 for the storage of about 1 kg of compressed refrigerant at a pressure of 15 bar and a in a secondary line L2 between the evaporator 4 and the suction side of the compressor 1 arranged refrigerant accumulator 6 for relaxed refrigerant on. This ( 6 ) has opposite the refrigerant reservoir 5 a considerably larger volume of 70 dm 2 . In the secondary line L1 are in front of and behind the refrigerant storage 5 controllable shut-off valves A1 and A2 arranged and in the secondary line L2 controllable shut-off valves A5 and A6. In addition, shut-off valves A3 and A4 or A7 and A8 are respectively arranged in the section of the refrigerant line, which is bridged by the respective secondary line L1 and L2.

Der Kältemittelspeicher 5 wird im Teillastbetrieb der Klimaanlage gefüllt, da in diesem Betrieb Kältemittel zur Erbringung der geforderten Kälteleistung überschüssig ist. Das überschüssige Kältemittel wird bei geöffnetem Absperrventil A1, geöffneten Absperrventilen A3 und A4 und geschlossenem Absperrventil A2 in den Kältemittelspeicher 5 geleitet, bis in diesem der Sättigungsdruck erreicht ist. Dann wird das Absperrventil A1 geschlossen.The refrigerant reservoir 5 is filled in part-load operation of the air conditioner, since in this operation, refrigerant to provide the required cooling capacity is surplus. The excess refrigerant is in the refrigerant storage with open shut-off valve A1, opened shut-off valves A3 and A4 and closed shut-off valve A2 5 passed until in this the saturation pressure is reached. Then the shut-off valve A1 is closed.

Wird nun der Fahrzeugmotor bei eingeschalteter Klimaanlage ausgeschaltet, wird auch der Kompressor 1 ausgeschaltet. Der Kältemittel-Kreislauf kommt zum Erliegen. Zur Aufrechterhaltung der Klimatisierung werden zeitgleich hochdruckseitig die Absperrventile A3 und A4 geschlossen und das Absperrventil A2 geöffnet und niederdruckseitig die Absperrventile A7 und A8 geschlossen und A5 geöffnet, so dass entspanntes Kältemittel über den Verdampfer 4 in den Kältemittelspeicher 6 strömen kann. Das entspannte Kältemittel strömt so lange, solange ein Druckgefälle zur Saugseite vorhanden ist. Ist dieses ausgeglichen, muss zur weiteren Klimatisierung nach einer entsprechenden Absperrventilsteuerung der Kompressor 1 wieder eingeschaltet werden, durch die der Kältemittelspeicher 6 geleert wird und der Kältemittelspeicher 5 wieder befällt werden kann.If the vehicle engine is switched off when the air conditioning is switched on, the compressor will also be switched off 1 switched off. The refrigerant cycle comes to a standstill. To maintain the air conditioning, the shut-off valves A3 and A4 are closed at the same time on the high-pressure side and the shut-off valve A2 is opened and the shut-off valves A7 and A8 are closed on the low-pressure side and A5 is opened, so that expanded refrigerant via the evaporator 4 in the refrigerant storage tank 6 can flow. The expanded refrigerant flows as long as there is a pressure gradient to the suction side. If this is balanced, for further air conditioning after a corresponding shut-off valve control, the compressor 1 be turned on again, through which the refrigerant storage 6 is emptied and the refrigerant storage 5 can be re-infested.

Das erheblich größere Volumen des Kältemittelspeichers 6 ermöglicht dabei ein beständiges Druckgefälle während einer vorbestimmten Zeitdauer und erhält während dieser einen Massenstrom über den Verdampfer aufrecht. Unter der Annahme von 1 kg Kältemittel unter einem Druck von 15 bar im Kältemittelspeicher 5 und einem Massenstrom von ca. 70 Kg/h könnte eine Klimatisierung von etwa 50 s Dauer realisiert werden, ohne dass es zu Kälteleistungseinbußen kommt.The considerably larger volume of the refrigerant reservoir 6 allows a stable pressure drop during a predetermined period of time and maintains during this a mass flow through the evaporator upright. Assuming 1 kg of refrigerant under a pressure of 15 bar in the refrigerant storage tank 5 and a mass flow of about 70 Kg / h could be an air conditioning of about 50 s duration realized without it comes to cooling performance losses.

11
Kompressorcompressor
22
KältemittelkühlerRefrigerant cooler
33
Expansionsventilexpansion valve
44
VerdampferEvaporator
55
KältemittelspeicherRefrigerant storage
66
KältemittelspeicherRefrigerant storage
LL
KältemittelleitungRefrigerant line
L1L1
Nebenleitungsecondary line
L2L2
Nebenleitungsecondary line
A1 bis A8A1 to A8
AbsperrventileShut-off valves

Claims (5)

Kältemittel-Kreislauf für eine Klimaanlage in einem Kraftfahrzeug, mit einem von dem Motor des Kraftfahrzeugs angetriebenen Kompressor, einem mit dessen Ausgang verbundenen Kältemittelkühler, einem den Kältemittelfluss regelnden Expansionsorgan und einem mit diesem und dem Eingang des Kompressors verbundenen Verdampfer sowie mit die aufgeführten Komponenten verbindenden Kältemittelleitungen, dadurch gekennzeichnet, dass hochdruckseitig ein aus dem Kreislauf speisbarer und mit dem Expansionsorgan (3) verbindbarer Kältemittelspeicher (5) für komprimiertes Kältemittel angeordnet ist, der bei Motor- und somit Kompressorstillstand und geforderter Kälteleistung einen Kältemittelfluss über den Verdampfer (4) bis zu einem Druckausgleich mit der Saugseite des Kompressors (1) aufrechterhält.Refrigerant circuit for an air conditioner in a motor vehicle, comprising a compressor driven by the engine of the motor vehicle, a refrigerant radiator connected to its outlet, a refrigerant flow regulating expansion element and an evaporator connected thereto and the input of the compressor, and refrigerant lines connecting the components listed , characterized in that the high-pressure side a feedable from the circulation and with the expansion organ ( 3 ) connectable refrigerant storage ( 5 ) is arranged for compressed refrigerant, which at engine and thus compressor standstill and required cooling capacity, a refrigerant flow through the evaporator ( 4 ) to a pressure equalization with the suction side of the compressor ( 1 ). Kältemittel-Kreislauf nach Anspruch 1, dadurch gekennzeichnet, dass der Kältemittelspeicher (5) in einer an die Hochdruckseite des Expansionsorgans (3) gekoppelten Abzweig- oder einer Nebenleitung (L1) angeordnet ist, über die in Verbindung mit steuerbaren Absperrorganen (A1 bis A4) die Speisung und Entleerung des Kältemittelspeichers (5) ermöglicht ist.Refrigerant circuit according to claim 1, characterized in that the refrigerant reservoir ( 5 ) in a to the high pressure side of the expansion organ ( 3 ) coupled branch line or a secondary line (L1) is arranged, via which in conjunction with controllable shut-off devices (A1 to A4), the supply and drainage of the refrigerant storage ( 5 ) is possible. Kältemittel-Kreislauf nach Anspruch 1, dadurch gekennzeichnet, dass in einer Abzweig- oder in einer Nebenleitung (L2) zur Saugleitung des Kompressors (1) hinter dem Verdampfer (4) ein Kältemittelspeicher (6) für entspanntes Kältemittel angeordnet ist, der bei Öffnung des Kältemittelspeichers (5) geöffnet und bis zu einem Druckausgleich befüllbar ist, wobei das Volumen des Kältemittelspeichers (6) um ein Vielfaches größer als das des Kältemittelspeichers (5) ist.Refrigerant circuit according to claim 1, characterized in that in a branch or in a secondary line (L2) to the suction line of the compressor ( 1 ) behind the evaporator ( 4 ) a refrigerant storage ( 6 ) is arranged for expanded refrigerant which, when opening the refrigerant reservoir ( 5 ) is open and can be filled to a pressure equalization, wherein the volume of the refrigerant storage ( 6 ) many times larger than that of the refrigerant reservoir ( 5 ). Kältemittel-Kreislauf nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass in den Abzweig- oder Nebenleitungen (L1, L2) und den durch diese überbrückten Kältemittelleitungen (L) steuerbare Absperrorgane (A1 bis A8) angeordnet sind, über die die Kältemittelspeicher (5, 6) zuschalt- oder absperrbar sind.Refrigerant circuit according to claim 1, 2 or 3, characterized in that in the branch lines or secondary lines (L1, L2) and the bridged by these refrigerant lines (L) controllable shut-off elements (A1 to A8) are arranged, via which the refrigerant storage ( 5 . 6 ) can be switched on or shut off. Kältemittel-Kreislaufs nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Kältemittelspeicher (5) bei Teillastbetrieb der Klimaanlage mit überschüssigem Kältemittel befällt wird.Refrigerant circuit according to claim 1 or 2, characterized in that the refrigerant reservoir ( 5 ) is attacked at partial load operation of the air conditioner with excess refrigerant.
DE102006001919A 2006-01-14 2006-01-14 Coolant circuit for air conditioning system, has coolant storage arranged in high pressure side and connected with valve to maintain coolant flow via evaporator till pressure is compensated with suction side of compressor Ceased DE102006001919A1 (en)

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Cited By (7)

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DE102007036299A1 (en) * 2007-07-31 2009-02-05 Behr Gmbh & Co. Kg Method of operating an air conditioner
DE102008029763A1 (en) 2008-06-25 2009-12-31 Volkswagen Ag Mobile air conditioning system for use in e.g. motor vehicle, has housing with vertical and horizontal housing walls, and fastening devices i.e. fastening rails, provided at housing walls, where housing is fastened at motor vehicle by rails
DE102009041459A1 (en) 2009-09-12 2011-03-24 Olaf Wessler Air conditioning system, particularly for insertion in electrically operated motor vehicles, has compressor, condenser and evaporator and refrigerant with highly specific cooling capacity
DE102010026644A1 (en) * 2010-07-09 2012-01-12 Behr-Hella Thermocontrol Gmbh Cooling device for air conditioning apparatus of motor car, has storage fluidically connected with heat exchanger and valve, where compressed coolant is conveyed from storage to vaporizer over valve in drive or stop mode of car
DE102014102830A1 (en) * 2014-03-04 2015-09-10 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Refrigeration system for an air conditioner for the air conditioning of a motor vehicle and method for cooling charge air of a turbocharger of a motor vehicle
EP3239624A1 (en) * 2016-04-27 2017-11-01 Rolls-Royce Corporation Supercritical transient storage of refrigerant
WO2022106374A1 (en) * 2020-11-23 2022-05-27 Valeo Systemes Thermiques Thermal conditioning system for a motor vehicle

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007036299A1 (en) * 2007-07-31 2009-02-05 Behr Gmbh & Co. Kg Method of operating an air conditioner
DE102008029763A1 (en) 2008-06-25 2009-12-31 Volkswagen Ag Mobile air conditioning system for use in e.g. motor vehicle, has housing with vertical and horizontal housing walls, and fastening devices i.e. fastening rails, provided at housing walls, where housing is fastened at motor vehicle by rails
DE102009041459A1 (en) 2009-09-12 2011-03-24 Olaf Wessler Air conditioning system, particularly for insertion in electrically operated motor vehicles, has compressor, condenser and evaporator and refrigerant with highly specific cooling capacity
DE102010026644A1 (en) * 2010-07-09 2012-01-12 Behr-Hella Thermocontrol Gmbh Cooling device for air conditioning apparatus of motor car, has storage fluidically connected with heat exchanger and valve, where compressed coolant is conveyed from storage to vaporizer over valve in drive or stop mode of car
DE102014102830A1 (en) * 2014-03-04 2015-09-10 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Refrigeration system for an air conditioner for the air conditioning of a motor vehicle and method for cooling charge air of a turbocharger of a motor vehicle
DE102014102830B4 (en) 2014-03-04 2022-11-03 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Refrigeration system for an air conditioning system for a motor vehicle and method for cooling the charge air of a turbocharger of a motor vehicle
EP3239624A1 (en) * 2016-04-27 2017-11-01 Rolls-Royce Corporation Supercritical transient storage of refrigerant
US10641531B2 (en) 2016-04-27 2020-05-05 Rolls-Royce Corporation Supercritical transient storage of refrigerant
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FR3116471A1 (en) * 2020-11-23 2022-05-27 Valeo Systemes Thermiques Motor vehicle thermal conditioning system

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