EP1948927B1 - Air-conditioning compressor with a differential-pressure limiting device - Google Patents

Air-conditioning compressor with a differential-pressure limiting device Download PDF

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Publication number
EP1948927B1
EP1948927B1 EP06806685A EP06806685A EP1948927B1 EP 1948927 B1 EP1948927 B1 EP 1948927B1 EP 06806685 A EP06806685 A EP 06806685A EP 06806685 A EP06806685 A EP 06806685A EP 1948927 B1 EP1948927 B1 EP 1948927B1
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EP
European Patent Office
Prior art keywords
air conditioning
check valve
pressure
conditioning compressor
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.)
Not-in-force
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EP06806685A
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German (de)
French (fr)
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EP1948927A1 (en
Inventor
Willi Parsch
Thomas Di Vito
Jan Hinrichs
Robert Mager
Jürgen Wertenbach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Ixetic Mac GmbH
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Bayerische Motoren Werke AG
Ixetic Mac GmbH
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Publication of EP1948927A1 publication Critical patent/EP1948927A1/en
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Classifications

    • 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
    • F04B27/10—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 having stationary cylinders
    • 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
    • F25B49/005—Arrangement or mounting of control or safety devices of safety devices
    • 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
    • F04B27/10—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 having stationary cylinders
    • F04B27/1036—Component parts, details, e.g. sealings, lubrication
    • 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
    • F04B27/10—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 having stationary cylinders
    • F04B27/1036—Component parts, details, e.g. sealings, lubrication
    • F04B27/1081—Casings, housings
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/03—Stopping, starting, unloading or idling control by means of valves
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/10—Other safety measures

Definitions

  • the invention relates to an air conditioning compressor for air conditioning systems in motor vehicles, the air compressor having at the high pressure outlet a check valve and a pressure limiting device.
  • an air conditioning compressor is from the DE 19810789A known.
  • Such compressors are known.
  • the integration of the check valve is required to improve the starting behavior of the stroke volume adjustable compressor and to ensure the clutchless drive of the compressor for the deactivated air conditioning operation.
  • This check valve is installed in the high pressure area of the system and separates at least in the case of a pressure gradient opposite to the passage direction of the check valve within the high pressure side, the high pressure side in two sections.
  • a pressure relief valve is integrated on the high pressure side in the air conditioning compressor, which lies downstream of the check valve. This means that in the case of a pressure gradient on the check valve counter to the passage direction of the check valve, so with a pressure increase in the remaining high pressure range of the air conditioner, the high pressure on the pressure relief valve can not be reduced.
  • an air conditioning compressor for air conditioners in motor vehicles wherein the air compressor at the high pressure outlet has a check valve and a pressure limiting device, such as a pressure relief valve or rupture disc, the pressure limiting device is arranged downstream of the check valve and parallel to the check valve, a differential pressure limiting device is arranged.
  • a pressure limiting device such as a pressure relief valve or rupture disc
  • the differential pressure limiting device acts in both directions of flow, that is to say both in the direction of flow from the air conditioning compressor in the air conditioner as well as in the reverse flow direction.
  • an air-conditioning compressor is preferred, in which the differential pressure limiting device is a valve device is therefore reversible, reusable.
  • an air-conditioning compressor is preferred in which the differential pressure-limiting device is a rupture disk.
  • Another inventive air compressor is characterized in that the rupture disk is integrated in the check valve. Also, an air-conditioning compressor is preferred in which the pressure difference for the triggering of the rupture disk is greater than the pressure difference for the check valve. This has the advantage that initially an increase in pressure above the maximum pressure at the compressor outlet via the check valve can act on the pressure limiting valve arranged behind it. Only in the event of jamming or failure of the check valve will then trigger the differential pressure limiting and connect the increased pressure at the compressor output to the pressure relief valve in the other part of the high pressure line of the air conditioner.
  • a compressor is preferred in which the differential pressure limiting device on the high-pressure side of the air conditioning system connects the air conditioning compressor and the remaining high-pressure part of the air conditioning system, that is to say both system parts, with the actual pressure limiting valve.
  • FIG. 1 is the high pressure area of an air conditioner including an air compressor 1 shown.
  • the air conditioning compressor 1 sucks refrigerant, compresses it and conveys it via a check valve 3 in an outlet 11, with which the outer high-pressure part of the air conditioner begins. From the outlet line 11, the refrigerant first flows through a gas cooler 5, then via an inner heat exchanger 7 and finally reaches the expansion valve 9, where the refrigerant expands to a lower pressure. Thus, the high pressure area of the air conditioner goes into the low pressure area, which is not considered here.
  • the compressor 1 has a housing 13, in which both the check valve 3 and a pressure limiting device 15 and a differential pressure limiting device 17 is arranged.
  • the check valve 3 is required to improve the starting performance of the stroke volume-adjustable compressor 1 and to ensure the clutchless drive of the compressor 1 for the shut-off air compressor operation.
  • the check valve 3 which may have, for example, an opening pressure of 2 bar, builds up directly at the start of a certain pressure in the compressor 1, which ensures a swinging of the compressor engine and thus for a immediately beginning promotion of the air conditioning compressor 1.
  • Downstream of the check valve 3 is a pressure limiting device 15, for example in the form of a pressure limiting valve or a rupture disc, arranged which opens, for example, when a maximum pressure of about 160 bar is exceeded and prevents further pressure increase.
  • This pressure limiting device 15 thus secures via the check valve 3 both the maximum pressure of the compressor 1 and the remaining high-pressure part of the air conditioning system up to the expansion valve 9.
  • a differential pressure limiting device 17 may be operative which, for example, connects the air conditioning compressor 1 and the remaining high pressure area of the air conditioning system at a differential pressure of 10 bar in both directions.
  • FIG. 2 such a differential pressure limiting device is shown schematically as a differential pressure valve.
  • Parallel to the check valve 3, an effective in the same flow direction check valve 19 and an effective in the opposite direction check valve 21 are arranged.
  • the valves 19 and 21, for example, each have an opening pressure of 10 bar, so that at a pressure difference between the air conditioning compressor and the other high pressure area 23 of the air conditioner both parts of the system at a pressure difference of 10 bar with each other and thus connected to the pressure relief valve 15.
  • the opening pressure of the differential pressure limiting device for example, 10 bar, higher than the differential pressure of the check valve 3, as this normally fulfills the safety function with the pressure relief valve 15 arranged behind both for the compressor 1 and for the high pressure area 23 of the air conditioning.
  • the piston 31 of the check valve 29 is pressed within the valve housing 33 by a coil spring 35 in the valve seat 37, wherein the coil spring 35 with a biasing force up to an opening pressure of about 2 bar, the valve 29 is closed.
  • the refrigerant from the compressor 1 via the line 39 to the output line 11 of the air compressor in the high-pressure region 23 of the air conditioning can be passed.
  • the rupture disk 25 will break and thus the line 41 between the air conditioning compressor 1 and the high-pressure region 23 of the air conditioner will be effective.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

An air conditioning compressor for air conditioning systems in motor vehicles, wherein the air conditioning compressor at the high pressure output comprises a check valve and a pressure control device, for example a pressure control valve or a bursting disk.

Description

Die Erfindung betrifft einen Klimakompressor für Klimaanlagen in Kraftfahrzeugen, wobei der Klimakompressor am Hochdruckausgang ein Rückschlagventil und eine Druckbegrenzungseinrichtung aufweist. Ein solcher Klimakompressor ist aus der DE 19810789A bekannt.The invention relates to an air conditioning compressor for air conditioning systems in motor vehicles, the air compressor having at the high pressure outlet a check valve and a pressure limiting device. Such an air conditioning compressor is from the DE 19810789A known.

Derartige Kompressoren sind bekannt. Die Integration des Rückschlagventils ist zur Verbesserung des Startverhaltens des hubvolumenverstellbaren Kompressors und zur Sicherstellung des kupplungslosen Antriebs des Kompressors für den ausgeschalteten Klimaanlagenbetrieb erforderlich. Dieses Rückschlagventil ist im Hochdruckbereich der Anlage eingebaut und trennt mindestens im Falle eines Druckgradienten entgegen der Durchgangsrichtung des Rückschlagventils innerhalb der Hochdruckseite die Hochdruckseite in zwei Teilbereiche auf.Such compressors are known. The integration of the check valve is required to improve the starting behavior of the stroke volume adjustable compressor and to ensure the clutchless drive of the compressor for the deactivated air conditioning operation. This check valve is installed in the high pressure area of the system and separates at least in the case of a pressure gradient opposite to the passage direction of the check valve within the high pressure side, the high pressure side in two sections.

Weiterhin ist im Stand der Technik ein Druckbegrenzungsventil auf der Hochdruckseite im Klimakompressor integriert, welches stromab vor dem Rückschlagventil liegt. Das bedeutet, dass im Falle eines Druckgradienten am Rückschlagventil entgegen der Durchgangsrichtung des Rückschlagventils, also bei einem Druckanstieg im restlichen Hochdruckbereich der Klimaanlage, der Hochdruck über das Druckbegrenzungsventil nicht abgebaut werden kann.Furthermore, in the prior art, a pressure relief valve is integrated on the high pressure side in the air conditioning compressor, which lies downstream of the check valve. This means that in the case of a pressure gradient on the check valve counter to the passage direction of the check valve, so with a pressure increase in the remaining high pressure range of the air conditioner, the high pressure on the pressure relief valve can not be reduced.

Es ist daher Aufgabe der Erfindung, einen Klimakompressor bzw. eine Klimaanlage darzustellen, welcher bzw. welche diese Probleme nicht aufweist.It is therefore an object of the invention to present an air conditioning compressor or an air conditioner which does not have these problems.

Die Aufgabe wird gelöst durch einen Klimakompressor für Klimaanlagen in Kraftfahrzeugen, wobei der Klimakompressor am Hochdruckausgang ein Rückschlagventil und eine Druckbegrenzungseinrichtung aufweist, beispielsweise ein Druckbegrenzungsventil oder eine Berstscheibe, wobei die Druckbegrenzungseinrichtung stromab hinter dem Rückschlagventil angeordnet ist und wobei parallel zum Rückschlagventil eine Differenzdruckbegrenzungseinrichtung angeordnet ist. Bevorzugt wird ein Klimakompressor, bei welchem die Differenzdruckbegrenzungseinrichtung in beide Strömungsrichtungen wirkt, also sowohl in Strömungsrichtung vom Klimakompressor in die Klimaanlage als auch in die umgekehrte Strömungsrichtung. Das hat den Vorteil, dass auch bei Verwendung eines Rückschlagventils eine Druckbegrenzung für den gesamten Hochdruckbereich der Klimaanlage vor und hinter dem Rückschlagventil sichergestellt ist.The object is achieved by an air conditioning compressor for air conditioners in motor vehicles, wherein the air compressor at the high pressure outlet has a check valve and a pressure limiting device, such as a pressure relief valve or rupture disc, the pressure limiting device is arranged downstream of the check valve and parallel to the check valve, a differential pressure limiting device is arranged. Preference is given to an air-conditioning compressor in which the differential pressure limiting device acts in both directions of flow, that is to say both in the direction of flow from the air conditioning compressor in the air conditioner as well as in the reverse flow direction. This has the advantage that even when using a check valve, a pressure limit for the entire high-pressure area of the air conditioning is ensured in front of and behind the check valve.

Auch wird ein Klimakompressor bevorzugt, bei welchem die Differenzdruckbegrenzungseinrichtung eine Ventileinrichtung ist also reversibel, wieder verwendbar.Also, an air-conditioning compressor is preferred, in which the differential pressure limiting device is a valve device is therefore reversible, reusable.

Weiterhin wird ein Klimakompressor bevorzugt, bei welchem die Differenzdruckbegrenzungseinrichtung eine Berstscheibe ist.Furthermore, an air-conditioning compressor is preferred in which the differential pressure-limiting device is a rupture disk.

Ein weiterer erfindungsgemäßer Klimakompressor zeichnet sich dadurch aus, dass die Berstscheibe im Rückschlagventil integriert ist. Auch wird ein Klimakompressor bevorzugt, bei welchem die Druckdifferenz für das Auslösen der Berstscheibe größer als die Druckdifferenz für das Rückschlagventil ist. Das hat den Vorteil, dass zunächst ein Druckanstieg über den maximalen Druck am Kompressorausgang über das Rückschlagventil auf das dahinter angeordnete Druckbegrenzungsventil wirken kann. Erst im Falle eines Klemmens oder Versagens des Rückschlagventils wird dann die Differenzdruckbegrenzung auslösen und den erhöhten Druck am Kompressorausgang mit dem Druckbegrenzungsventil in dem anderen Teil der Hochdruckleitung der Klimaanlage verbinden.Another inventive air compressor is characterized in that the rupture disk is integrated in the check valve. Also, an air-conditioning compressor is preferred in which the pressure difference for the triggering of the rupture disk is greater than the pressure difference for the check valve. This has the advantage that initially an increase in pressure above the maximum pressure at the compressor outlet via the check valve can act on the pressure limiting valve arranged behind it. Only in the event of jamming or failure of the check valve will then trigger the differential pressure limiting and connect the increased pressure at the compressor output to the pressure relief valve in the other part of the high pressure line of the air conditioner.

Weiterhin wird ein Kompressor bevorzugt, bei welchem die Differenzdruckbegrenzungseinrichtung auf der Hochdruckseite der Klimaanlage den Klimakompressor und den restlichen Hochdruckteil der Klimaanlage, also beide Anlagenteile, mit dem eigentlichen Druckbegrenzungsventil verbindet.Furthermore, a compressor is preferred in which the differential pressure limiting device on the high-pressure side of the air conditioning system connects the air conditioning compressor and the remaining high-pressure part of the air conditioning system, that is to say both system parts, with the actual pressure limiting valve.

Die Erfindung wird nun anhand der Figuren beschrieben.

Figur 1
zeigt schematisch den Hochdruckbereich einer Klimaanlage mit einem Klimakompressor mit einer Differenzdruckbegrenzungseinrichtung.
Figur 2
zeigt den Hochdruckbereich einer Klimaanlage mit einem Differenzdruckbegrenzungsventil.
Figur 3
zeigt den Hochdruckbereich einer Klimaanlage mit einer in einem Rückschlagventil integrierten Berstscheibe als Differenzdruckbegrenzung.
The invention will now be described with reference to the figures.
FIG. 1
schematically shows the high pressure area of an air conditioner with an air conditioning compressor with a differential pressure limiting device.
FIG. 2
shows the high pressure area of an air conditioner with a differential pressure relief valve.
FIG. 3
shows the high pressure area of an air conditioner with a rupture valve integrated in a check valve as a differential pressure limitation.

In Figur 1 ist der Hochdruckbereich einer Klimaanlage einschließlich eines Klimakompressors 1 dargestellt. Der Klimakompressor 1 saugt Kältemittel an, verdichtet es und fördert es über ein Rückschlagventil 3 in eine Auslassleitung 11, mit welcher der äußere Hochdruckteil der Klimaanlage beginnt. Von der Auslassleitung 11 strömt das Kältemittel zunächst über einen Gaskühler 5, danach über einen inneren Wärmetauscher 7 und gelangt schließlich zum Expansionsventil 9, wo das Kältemittel auf einen niedrigeren Druck expandiert. Damit geht der Hochdruckbereich der Klimaanlage in den Niederdruckbereich über, der hier nicht betrachtet wird. Der Kompressor 1 weist ein Gehäuse 13 auf, in welchem sowohl das Rückschlagventil 3 als auch eine Druckbegrenzungseinrichtung 15 und eine Differenzdruckbegrenzungseinrichtung 17 angeordnet ist. Das Rückschlagventil 3 ist zur Verbesserung des Startverhaltens des hubvolumenverstellbaren Kompressors 1 und zur Sicherstellung des kupplungslosen Antriebs des Kompressors 1 für den abgeschalteten Klimakompressorbetrieb erforderlich. Durch das Rückschlagventil 3, welches beispielsweise einen Öffnungsdruck von 2 Bar aufweisen kann, baut sich direkt beim Starten ein gewisser Druck im Kompressor 1 auf, welcher für ein Ausschwenken des Kompressortriebwerks und damit für eine sofort beginnende Förderung des Klimakompressors 1 sorgt. Stromab hinter dem Rückschlagventil 3 ist eine Druckbegrenzungseinrichtung 15, beispielsweise in Form eines Druckbegrenzungsventils oder einer Berstscheibe, angeordnet, welche beispielsweise bei Überschreiten eines Maximaldruckes von etwa 160 Bar öffnet und einen weiteren Druckanstieg verhindert. Diese Druckbegrenzungseinrichtung 15 sichert damit über das Rückschlagventil 3 sowohl den Maximaldruck des Kompressors 1 als auch den restlichen Hochdruckteil der Klimaanlage bis zum Expansionsventil 9 ab. Sollte jedoch das Rückschlagventil 3 durch irgendeine Betriebsstörung klemmen oder versagen, so kann eine Differenzdruckbegrenzungseinrichtung 17 wirksam werden, welche beispielsweise bei einem Differenzdruck von 10 Bar in beiden Richtungen den Klimakompressor 1 und den restlichen Hochdruckbereich der Klimaanlage miteinander verbindet.In FIG. 1 is the high pressure area of an air conditioner including an air compressor 1 shown. The air conditioning compressor 1 sucks refrigerant, compresses it and conveys it via a check valve 3 in an outlet 11, with which the outer high-pressure part of the air conditioner begins. From the outlet line 11, the refrigerant first flows through a gas cooler 5, then via an inner heat exchanger 7 and finally reaches the expansion valve 9, where the refrigerant expands to a lower pressure. Thus, the high pressure area of the air conditioner goes into the low pressure area, which is not considered here. The compressor 1 has a housing 13, in which both the check valve 3 and a pressure limiting device 15 and a differential pressure limiting device 17 is arranged. The check valve 3 is required to improve the starting performance of the stroke volume-adjustable compressor 1 and to ensure the clutchless drive of the compressor 1 for the shut-off air compressor operation. By the check valve 3, which may have, for example, an opening pressure of 2 bar, builds up directly at the start of a certain pressure in the compressor 1, which ensures a swinging of the compressor engine and thus for a immediately beginning promotion of the air conditioning compressor 1. Downstream of the check valve 3 is a pressure limiting device 15, for example in the form of a pressure limiting valve or a rupture disc, arranged which opens, for example, when a maximum pressure of about 160 bar is exceeded and prevents further pressure increase. This pressure limiting device 15 thus secures via the check valve 3 both the maximum pressure of the compressor 1 and the remaining high-pressure part of the air conditioning system up to the expansion valve 9. However, should the check valve 3 jam or fail due to any malfunction, a differential pressure limiting device 17 may be operative which, for example, connects the air conditioning compressor 1 and the remaining high pressure area of the air conditioning system at a differential pressure of 10 bar in both directions.

In Figur 2 ist eine derartige Differenzdruckbegrenzungseinrichtung als Differenzdruckventil schematisch dargestellt. Parallel zum Rückschlagventil 3 sind ein in gleiche Strömungsrichtung wirksames Rückschlagventil 19 und ein in Gegenrichtung wirksames Rückschlagventil 21 angeordnet. Die Ventile 19 und 21 haben beispielsweise jeweils einen Öffnungsdruck von 10 Bar, sodass bei einer Druckdifferenz zwischen dem Klimakompressor und dem übrigen Hochdruckbereich 23 der Klimaanlage beide Anlagenteile bei einer Druckdifferenz von 10 Bar miteinander und damit mit dem Druckbegrenzungsventil 15 verbunden werden. Sinnvollerweise ist der Öffnungsdruck der Differenzdruckbegrenzungseinrichtung, beispielsweise mit 10 Bar, höher als der Differenzdruck des Rückschlagventils 3, da dieses im Normalfall die Sicherheitsfunktion mit dem dahinter angeordneten Druckbegrenzungsventil 15 ebenfalls sowohl für den Kompressor 1 als auch für den Hochdruckbereich 23 der Klimaanlage erfüllt.In FIG. 2 such a differential pressure limiting device is shown schematically as a differential pressure valve. Parallel to the check valve 3, an effective in the same flow direction check valve 19 and an effective in the opposite direction check valve 21 are arranged. The valves 19 and 21, for example, each have an opening pressure of 10 bar, so that at a pressure difference between the air conditioning compressor and the other high pressure area 23 of the air conditioner both parts of the system at a pressure difference of 10 bar with each other and thus connected to the pressure relief valve 15. It makes sense, the opening pressure of the differential pressure limiting device, for example, 10 bar, higher than the differential pressure of the check valve 3, as this normally fulfills the safety function with the pressure relief valve 15 arranged behind both for the compressor 1 and for the high pressure area 23 of the air conditioning.

Insbesondere ist die höhere Druckdifferenz für die Differenzdruckabsicherung im Falle der Verwendung einer Berstscheibe 25 innerhalb des Rückschlagventils 29, wie in Figur 3 dargestellt, notwendig, da die Berstscheibe 25 im Normalbetrieb nicht zerstört werden soll, sondern das Rückschlagventil 29 mit seinem Öffnungsdruck von ca. 2 Bar für das Anlaufen und Ausschwenken des Kompressors 1 notwendig ist und danach den Kompressor 1 mit dem Hochdruckbereich 23 der Klimaanlage verbinden soll. Die Verwendung einer Berstscheibe 25 innerhalb des Kolbens 31 des Rückschlagventils 29 bietet dabei den besonderen Vorteil keines zusätzlichen Platzbedarfes für die Differenzdruckbegrenzung, da diese somit in das bereits vorhandene Rückschlagventil integriert werden kann. Im Normalbetrieb wird der Kolben 31 des Rückschlagventils 29 innerhalb des Ventilgehäuses 33 durch eine Schraubenfeder 35 in den Ventilsitz 37 gedrückt, wobei die Schraubenfeder 35 mit einer Vorspannkraft bis zu einem Öffnungsdruck von etwa 2 Bar das Ventil 29 geschlossen hält. Nach Öffnen des Rückschlagventils 29 kann das Kältemittel vom Kompressor 1 über die Leitung 39 zur Ausgangsleitung 11 des Klimakompressors in den Hochdruckbereich 23 der Klimaanlage geleitet werden. Im Falle der Druckdifferenzüberschreitung von z. B. 10 bar an der Berstscheibe 25 in die eine oder andere Richtung wird die Berstscheibe 25 zerbrechen und damit die Leitung 41 zwischen dem Klimakompressor 1 und dem Hochdruckbereich 23 der Klimaanlage wirksam werden. Durch die Differenzdruckeinrichtung in Form der Berstscheibe 25 werden also beide Anlagenteile auf der Hochdruckseite bei Klemmen oder Versagen des Rückschlagventils 29 mit dem Druckbegrenzungsventil 15 verbunden und damit abgesichert.In particular, the higher pressure differential for the differential pressure protection in the case of using a rupture disk 25 within the check valve 29, as in FIG. 3 shown, necessary, since the rupture disk 25 should not be destroyed in normal operation, but the check valve 29 with its opening pressure of about 2 bar for starting and swinging the compressor 1 is necessary and then connect the compressor 1 to the high-pressure region 23 of the air conditioner , The use of a rupture disk 25 within the piston 31 of the check valve 29 thereby offers the particular advantage of no additional space requirement for the differential pressure limitation, since this can thus be integrated into the already existing check valve. In normal operation, the piston 31 of the check valve 29 is pressed within the valve housing 33 by a coil spring 35 in the valve seat 37, wherein the coil spring 35 with a biasing force up to an opening pressure of about 2 bar, the valve 29 is closed. After opening the check valve 29, the refrigerant from the compressor 1 via the line 39 to the output line 11 of the air compressor in the high-pressure region 23 of the air conditioning can be passed. In the case of pressure difference exceeding z. B. 10 bar on the rupture disk 25 in one or the other direction, the rupture disk 25 will break and thus the line 41 between the air conditioning compressor 1 and the high-pressure region 23 of the air conditioner will be effective. By the differential pressure device in the form of rupture disk 25 so both parts of the system on the high pressure side at terminals or failure of the check valve 29 are connected to the pressure relief valve 15 and thus secured.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Klimakompressorair compressor
33
Rückschlagventilcheck valve
55
Gaskühlergas cooler
77
innerer Wärmetauscherinternal heat exchanger
99
Expansionsventilexpansion valve
1111
Auslassleitungoutlet pipe
1313
Kompressorgehäusecompressor housing
1515
DruckbegrenzungseinrichtungPressure limiting device
1717
DifferenzdruckbegrenzungseinrichtungDifferential pressure control device
1919
Rückschlagventilcheck valve
2121
Rückschlagventilcheck valve
2323
Hochdruckbereich der KlimaanlageHigh pressure area of the air conditioning
2525
Berstscheiberupture disc
2929
Rückschlagventilcheck valve
3131
Kolben des Rückschlagventils 29Piston of the check valve 29
3333
Ventilgehäusevalve housing
3535
Schraubenfedercoil spring
3737
Ventilsitzvalve seat
3939
Leitung zur Ausgangsleitung 11Line to the output line 11
4141
Leitung zwischen dem Klimakompressor 1 und dem Hochdruckbereich 23Line between the air compressor 1 and the high pressure area 23rd

Claims (7)

  1. An air conditioning compressor (1) for air conditioning systems in motor vehicles, the air conditioning compressor (1) at the high pressure output comprising a check valve (3) and a pressure control device (15), for example a pressure control valve or a bursting disk, characterized in that the pressure control device (15) is disposed downstream behind the check valve (3) and that a differential pressure control device (17) is disposed parallel in to the check valve (3).
  2. The air conditioning compressor (1) according to claim 1, characterized in that the differential pressure control device (17) acts in both flow directions, which is to say both in the flow direction from the air conditioning compressor (1) into the air conditioning system, and also in the opposite flow direction.
  3. The air conditioning compressor (1) according to claim 1 or claim 2, characterized in that the differential pressure control device (17) is a valve device, which is to say it is reversible and reusable.
  4. The air conditioning compressor according to claim 1 or claim 2, characterized in that the differential pressure control device (17) is a bursting disk (25).
  5. The air conditioning compressor according to claim 4, characterized in that the bursting disk (25) is integrated in the check valve (3, 29).
  6. The air conditioning compressor according to claim 4 or claim 5, characterized in that the pressure differential for triggering the bursting disk (25) is greater than the pressure differential on the check valve (3, 29).
  7. An air conditioning compressor according to any one of the preceding claims, characterized in that the differential pressure control device (17) on the high pressure side of the air conditioning system connects the air conditioning compressor (1) and the remaining high pressure side (23) of the air conditioning system, which is to say both system parts, to the actual pressure control valve (15).
EP06806685A 2005-11-09 2006-11-04 Air-conditioning compressor with a differential-pressure limiting device Not-in-force EP1948927B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005053451 2005-11-09
PCT/EP2006/010586 WO2007054243A1 (en) 2005-11-09 2006-11-04 Air-conditioning compressor with a differential-pressure limiting device

Publications (2)

Publication Number Publication Date
EP1948927A1 EP1948927A1 (en) 2008-07-30
EP1948927B1 true EP1948927B1 (en) 2009-08-05

Family

ID=37668450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06806685A Not-in-force EP1948927B1 (en) 2005-11-09 2006-11-04 Air-conditioning compressor with a differential-pressure limiting device

Country Status (8)

Country Link
US (1) US20080282716A1 (en)
EP (1) EP1948927B1 (en)
JP (1) JP4739422B2 (en)
KR (1) KR101261398B1 (en)
CN (1) CN101305185B (en)
AT (1) ATE438800T1 (en)
DE (2) DE112006003052A5 (en)
WO (1) WO2007054243A1 (en)

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WO2015086326A1 (en) * 2013-12-13 2015-06-18 Magna Powertrain Bad Homburg GmbH Air conditioning compressor
CN104748430B (en) * 2015-03-31 2018-02-06 广东美的暖通设备有限公司 Multiple on-line system
EP3597970A1 (en) * 2018-07-16 2020-01-22 Goodrich Corporation Valve assembly

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Also Published As

Publication number Publication date
JP4739422B2 (en) 2011-08-03
WO2007054243A1 (en) 2007-05-18
CN101305185A (en) 2008-11-12
ATE438800T1 (en) 2009-08-15
KR101261398B1 (en) 2013-05-07
JP2009514733A (en) 2009-04-09
CN101305185B (en) 2010-12-15
KR20080066963A (en) 2008-07-17
DE112006003052A5 (en) 2008-10-23
US20080282716A1 (en) 2008-11-20
DE502006004468D1 (en) 2009-09-17
EP1948927A1 (en) 2008-07-30

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