[go: up one dir, main page]

WO2002002942A1 - Safety device for an air-conditioning compressor - Google Patents

Safety device for an air-conditioning compressor Download PDF

Info

Publication number
WO2002002942A1
WO2002002942A1 PCT/DE2001/002390 DE0102390W WO0202942A1 WO 2002002942 A1 WO2002002942 A1 WO 2002002942A1 DE 0102390 W DE0102390 W DE 0102390W WO 0202942 A1 WO0202942 A1 WO 0202942A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
area
engine
pressure area
suction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DE2001/002390
Other languages
German (de)
French (fr)
Inventor
Georg Weber
Tilo SCHÄFER
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.)
LuK Fahrzeug Hydraulik GmbH and Co KG
Original Assignee
LuK Fahrzeug Hydraulik GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by LuK Fahrzeug Hydraulik GmbH and Co KG filed Critical LuK Fahrzeug Hydraulik GmbH and Co KG
Priority to DE10193283T priority Critical patent/DE10193283D2/en
Priority to AU2001275655A priority patent/AU2001275655A1/en
Publication of WO2002002942A1 publication Critical patent/WO2002002942A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • 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
    • F04B27/14—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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
    • 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
    • F04B2027/185—Discharge pressure
    • 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
    • F04B2027/1863—Controlled by crankcase pressure with an auxiliary valve, controlled by
    • F04B2027/1872—Discharge pressure
    • 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
    • F04B2027/1886—Open (not controlling) fluid passage
    • F04B2027/189—Open (not controlling) fluid passage between crankcase and discharge chamber
    • 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
    • F04B2027/1886—Open (not controlling) fluid passage
    • F04B2027/1895—Open (not controlling) fluid passage between crankcase and suction chamber

Definitions

  • the invention relates to a safety device for the pressure limitation of a variable stroke or displacement variable compressor, in which the inclination of the swash plate or the swash plate can be varied by the difference between the high pressure in the discharge pressure area and the pressure in the drive chamber, possibly also by the difference between the pressure in the Drive room and the pressure in the suction area of the air conditioning compressor.
  • air conditioning compressors have a feed connection between the outlet chamber of the compressor in the discharge pressure area and the engine room pressure area.
  • a valve and, if appropriate, an additional connection from the engine pressure area to the suction pressure area, such as a bypass throttle can be arranged, which can influence the pressure difference between the discharge pressure area and the engine pressure area.
  • air conditioning compressors of this type can have a connection between the engine pressure area and the suction pressure area, in which a valve or a constant throttle can also be arranged, as a result of which the pressure difference between engine pressure and suction space pressure can be influenced.
  • a typical variable displacement compressor that is used, for example, in motor vehicles for their air conditioning systems, has an engine compartment which is provided within a housing and contains the engine elements for conveying the coolant.
  • a drive shaft is rotatably mounted in housing elements.
  • Part of the housing contains a cylinder block through which a plurality of cylinder bores extend. Pistons are reciprocally housed in each cylinder bore.
  • a swash plate or swash plate is provided on the drive shaft, which rotates with the drive shaft and is mounted in such a way that its inclination can be adjusted in relation to the drive shaft during the revolutions.
  • the pistons are coupled to the swash plate or swash plate with corresponding gear elements, such as sliding shoes. The stroke of the pistons during a back and forth movement within the associated cylinder bores is determined by the inclination of the swash plate or swash plate.
  • the inclination of the swash plate or swash plate is determined by adjusting the pressure in the drive chamber in relation to the pressures acting on the piston in the discharge pressure area, that is to say in the high pressure area, and in the suction area, that is i Low pressure range, controlled.
  • the difference between the pressures acting on the two ends of each piston can be determined by
  • Throttle devices or valve devices are provided with which the pressure in the drive chamber can be regulated in relation to the discharge pressure and the intake pressure. If necessary, these valve devices are over
  • Electromagnetic devices can be remotely controlled.
  • pressure limiting devices are provided which release the refrigerant to the environment, for example by means of rupture disks or pressure relief valves when the maximum pressure in the discharge pressure range is exceeded.
  • the object of the invention is to provide a safety device in which the maximum pressure in the high pressure area, the maximum pressure in the drive area area and the maximum pressure in the suction pressure area are secured.
  • a safety device for the pressure limitation of a stroke-variable or displacement-variable compressor in which the inclination of the swash plate or swash plate is varied at least by the difference between the high pressure in the discharge pressure area and the engine pressure, possibly by the difference between the engine pressure and suction pressure a supply connection between the discharge pressure area and the drive area pressure area, with a valve device which is arranged in the supply connection, and optionally a connection from the suction area pressure area to the drive area pressure area, in which a valve device is also arranged, and with a pressure relief valve which, when a high pressure in the high pressure area is exceeded, pressure medium into the Drains the drive room, with a further pressure relief valve or with a rupture disc, which releases pressure medium from the drive room into the environment when the pressure in the drive room is exceeded, whereby Safety devices for the high pressure area, for the drive area area and for the suction pressure area are functionally coupled to one another.
  • a safety device is preferred in which a check valve device is arranged between the suction pressure
  • a safety device is preferred in which the high pressure area and / or the suction pressure area are pressure-protected via the drive chamber.
  • Another safety device is characterized in that when the high pressure is exceeded in the high pressure area, the pressure relief valve responds and the pivoting compressor swings back.
  • Figure 1 shows a security concept
  • Figure 2 shows a further security concept.
  • FIG. 1 shows a schematic representation of such a safety device with the safety concept for all three pressure rooms.
  • a pressure limiting valve 30 connects the high pressure region 31 of a compressor 32, shown schematically here, to the engine compartment region 33.
  • the low pressure or intake pressure region 34 of the air conditioning compressor is connected to the engine compartment region 33 via a check valve 35.
  • the engine area 33 is connected to the environment 37, that is to say the atmosphere around the compressor, via a pressure relief valve 36. It is part of the function of this safety concept that when the maximum permissible pressure in the high-pressure region 31 is exceeded, the pressure relief valve 30 blows off the pressure medium conveyed from the discharge side into the crank chamber. This increases the engine pressure in the engine room 33 and the stroke of the compressor is reduced.
  • a check valve 35 can also be provided between the intake side 34 and the engine compartment side 33, which releases fluid from the intake side into the engine compartment when the pressure on the intake side is above the pressure in the engine compartment.
  • the additional pressure relief valve 36 can be used limit the pressure by blowing off the pressure medium into the atmosphere 37 in the drive chamber 33. But this is only necessary for extreme emergencies, since one can assume with a concept according to the invention that by exceeding the highest pressure in the system, namely the high pressure on the discharge side 31, the compressor pivots back through the pressure limiting valve 30 and no further
  • High pressure area 31 and suction pressure area 34 are shown.
  • FIG. 2 shows a variant of the safety concept from FIG. 1, which differs only in that the pressure limiting valve 36 from FIG. 1 is replaced by a rupture disk device 39 in order to safeguard the pressure in the drive room.
  • the safety concept described in this application eliminates the following disadvantages according to the invention, such as, for example, the separate securing of the discharge side and drive chamber and suction side by burst plugs or blow-off safety valves to the atmosphere, which has the disadvantage of more sealing points on the outside.
  • the safety concept just described thus brings about a reduction in the necessary sealing points to the outside or a reduction in the number of burst plugs or blow-off safety valves.
  • the number of system failures is reduced because there is no loss of tightness when the pressure on the discharge side is exceeded, since in this case the compressor swings back and additional power to increase the pressure is no longer generated.

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)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

The invention relates to a safety device for limiting the pressure of a compressor (32) that operates with variable stroke or variable displacement. The tilt of the wobble plate or the swash plate is varied at least by the difference between the high pressure in the discharge pressure zone (31) and the driving chamber pressure (33), optionally by the difference between the driving chamber pressure (33) and the intake pressure (34). The safety device is provided with a valve device (30) that is disposed in the supply connection and optionally with an additional connection between the driving chamber pressure zone (33) and the intake pressure zone (34). A pressure-limiting valve (30) discharges the pressure medium into the driving chamber (33) when a high pressure in the high pressure zone (31) is exceeded. the safety device is provided with a further pressure-limiting valve (36) or with a rupture disk (39) that discharges the pressure medium from the driving chamber (33) into the ambiance when the pressure in the driving chamber (33) is exceeded.

Description

Sicherheitseinrichtung für Klimakompressor Safety device for air conditioning compressor

Die Erfindung betrifft eine Sicherheitseinrichtung für die Druckbegrenzung eines hubvariablen bzw. verdrängungsvariablen Kompressors, bei dem die Neigung der Taumelscheibe oder der Schrägscheibe durch die Differenz zwischen dem Hochdruck im Entladedruckbereich und dem Druck im Triebraum variiert werden kann, gegebenenfalls auch durch die Differenz zwischen dem Druck im Triebraum und dem Druck im Saugbereich des Klimakompressors. Deswegen besitzen derartige Klimakompressoren eine Zufuhrverbindung zwischen der Auslaßkammer des Kompressors im Entladedruckbereich und dem Triebraumdruckbereich. In dieser Zufuhrverbindung kann ein Ventil und gegebenenfalls eine zusätzliche Verbindung vom Triebraumdruckbereich zum Saugraumdruckbereich, wie Bypassdrossel, angeordnet sein, die die Druckdifferenz zwischen Entladedruckbereich und Triebraumdruckbereich beeinflussen kann. Zusätzlich können derartige Klimakompressoren eine Verbindung zwischen dem Triebraumdruckbereich und dem Saugdruckbereich aufweisen, in denen gegebenenfalls auch ein Ventil oder eine Konstantdrossel angeordnet sein kann, wodurch die Druckdifferenz zwischen Triebraumdruck und Saugraumdruck beeinflußbar ist. Ein typischer verdrängungsvariabler Kompressor, der zum Beispiel in Kraftfahrzeugen für deren Klimaanlagen verwendet wird, hat einen Triebraum, der innerhalb eines Gehäuses vorgesehen ist und die Triebwerkselemente für die Förderung des Kühlmittels enthält. Eine Antriebswelle ist drehbar in Gehäuseelementen gelagert. Ein Teil des Gehäuses enthält einen Zylinderblock, durch den sich eine Vielzahl von Zylinderbohrungen erstrecken. Kolben sind hin- und herbewegbar in jeder Zylinderbohrung untergebracht. Auf der Antriebswelle ist eine Schrägscheibe oder Taumelscheibe vorgesehen, die sich mit der Antriebswelle dreht und derart gelagert ist, daß sie in Bezug zur Antriebswelle während der Umdrehungen in ihrer Neigung verstellt werden kann. Die Kolben sind mit entsprechenden Getriebeelementen, wie Gleitschuhen, an die Taumelscheibe oder Schrägscheibe angekoppelt. Der Hub der Kolben während einer Hin- und Herbewegung innerhalb der zugehörigen Zylinderbohrungen wird durch die Neigung der Taumelscheibe oder Schr gscheibe bestimmt.The invention relates to a safety device for the pressure limitation of a variable stroke or displacement variable compressor, in which the inclination of the swash plate or the swash plate can be varied by the difference between the high pressure in the discharge pressure area and the pressure in the drive chamber, possibly also by the difference between the pressure in the Drive room and the pressure in the suction area of the air conditioning compressor. For this reason, such air conditioning compressors have a feed connection between the outlet chamber of the compressor in the discharge pressure area and the engine room pressure area. In this supply connection, a valve and, if appropriate, an additional connection from the engine pressure area to the suction pressure area, such as a bypass throttle, can be arranged, which can influence the pressure difference between the discharge pressure area and the engine pressure area. In addition, air conditioning compressors of this type can have a connection between the engine pressure area and the suction pressure area, in which a valve or a constant throttle can also be arranged, as a result of which the pressure difference between engine pressure and suction space pressure can be influenced. A typical variable displacement compressor that is used, for example, in motor vehicles for their air conditioning systems, has an engine compartment which is provided within a housing and contains the engine elements for conveying the coolant. A drive shaft is rotatably mounted in housing elements. Part of the housing contains a cylinder block through which a plurality of cylinder bores extend. Pistons are reciprocally housed in each cylinder bore. A swash plate or swash plate is provided on the drive shaft, which rotates with the drive shaft and is mounted in such a way that its inclination can be adjusted in relation to the drive shaft during the revolutions. The pistons are coupled to the swash plate or swash plate with corresponding gear elements, such as sliding shoes. The stroke of the pistons during a back and forth movement within the associated cylinder bores is determined by the inclination of the swash plate or swash plate.

Die Neigung der Taumelscheibe oder Schrägscheibe wird durch Einstellen des Druckes im Triebraum in Relation zu den auf den Kolben wirkenden Drücken im Entladedruckbereich, das heißt im Hochdruckbereich, und im Saugbereich, das heißt i Niederdruckbereich, gesteuert. In anderen Worten ausgedrückt, kann die Differenz zwischen den Drücken, die auf die beiden Enden jedes Kolbens einwirken, durchThe inclination of the swash plate or swash plate is determined by adjusting the pressure in the drive chamber in relation to the pressures acting on the piston in the discharge pressure area, that is to say in the high pressure area, and in the suction area, that is i Low pressure range, controlled. In other words, the difference between the pressures acting on the two ends of each piston can be determined by

Ändern des Druckes im Triebraumbereich verändert werden. Dies ändert die Neigung der Taumelscheibe oder der Schrägscheibe und verändert das Verdrängungsvolumen des Kompressors. Darüber hinaus sind in den Verbindungskanälen zwischen diesenChanging the pressure in the engine area can be changed. This changes the inclination of the swash plate or swash plate and changes the displacement volume of the compressor. In addition, in the connecting channels between them

Druckbereichen Drosseleinrichtungen oder Ventileinrichtungen vorgesehen, mit welchen der Druck im Triebraum in Relation zum Entladedruck und zum Ansaugdruck geregelt werden kann. Gegebenenfalls sind diese Ventileinrichtungen überThrottle devices or valve devices are provided with which the pressure in the drive chamber can be regulated in relation to the discharge pressure and the intake pressure. If necessary, these valve devices are over

Elektromagnetvorrichtungen fernsteuerbar. Zusätzlich sind bei bekannten Kompressoren zur Absicherung des maximalen Druckes im Entladedruckbereich, also im Hochdruckbereich, Druckbegrenzungseinrichtungen vorgesehen, die zum Beispiel durch Berstscheiben oder durch Druckbegrenzungsventile bei Überschreiten des maximalen Druckes im Entladedruckbereich das Kältemittel an die Umgebung abgeben.Electromagnetic devices can be remotely controlled. In addition, in known compressors to secure the maximum pressure in the discharge pressure range, that is to say in the high pressure range, pressure limiting devices are provided which release the refrigerant to the environment, for example by means of rupture disks or pressure relief valves when the maximum pressure in the discharge pressure range is exceeded.

Aufgabe der Erfindung ist es, eine Sicherheitseinrichtung zu schaffen, bei der der maximale Druck im Hochdruckbereich, der maximale Druck im Triebraumbereich und der maximale Druck im Saugdruckbereich abgesichert sind.The object of the invention is to provide a safety device in which the maximum pressure in the high pressure area, the maximum pressure in the drive area area and the maximum pressure in the suction pressure area are secured.

Die Aufgabe wird gelöst durch eine Sicherheitseinrichtung für die Druckbegrenzung eines hubvariablen bzw. verdrängungsvariablen Kompressors, bei der die Neigung der Taumelscheibe bzw. der Schrägscheibe zumindest durch die Differenz zwischen Hochdruck im Entladedruckbereich und Triebraumdruck variiert wird, gegebenenfalls durch die Differenz zwischen Triebraumdruck und Saugdruck, mit einer Zufuhrverbindung zwischen Entladedruckbereich und Triebraumdruckbereich, mit einer Ventilvorrichtung, welche in der Zufuhrverbindung angeordnet ist, und gegebenenfalls einer Verbindung vom Saugraumdruckbereich zum Triebraumdruckbereich, in der ebenfalls eine Ventilvorrichtung angeordnet ist, und mit einem Druckbegrenzungsventil, welches bei Überschreitung eines Hochdruckes im Hochdruckbereich Druckmedium in den Triebraum ablasst, mit einem weiterem Druckbegrenzungsventil oder mit einer Berstscheibe, die bei Drucküberschreitung im Triebraum Druckmedium vom Triebraum in die Umgebung ablasst, wobei Sicherheitseinrichtungen für den Hochdruckbereich, für den Triebraumbereich und für den Saugdruckbereich miteinander funktional gekoppelt sind. Bevorzugt wird eine Sicherheitseinrichtung, bei der eine Rückschlagventileinrichtung zwischen Saugdruckbereich und Triebraumbereich angeordnet ist.The object is achieved by a safety device for the pressure limitation of a stroke-variable or displacement-variable compressor, in which the inclination of the swash plate or swash plate is varied at least by the difference between the high pressure in the discharge pressure area and the engine pressure, possibly by the difference between the engine pressure and suction pressure a supply connection between the discharge pressure area and the drive area pressure area, with a valve device which is arranged in the supply connection, and optionally a connection from the suction area pressure area to the drive area pressure area, in which a valve device is also arranged, and with a pressure relief valve which, when a high pressure in the high pressure area is exceeded, pressure medium into the Drains the drive room, with a further pressure relief valve or with a rupture disc, which releases pressure medium from the drive room into the environment when the pressure in the drive room is exceeded, whereby Safety devices for the high pressure area, for the drive area area and for the suction pressure area are functionally coupled to one another. A safety device is preferred in which a check valve device is arranged between the suction pressure area and the drive area area.

Weiterhin wird eine Sicherheitseinrichung bevorzugt, bei der der Hochdruckbereich und/oder der Saugdruckbereich über den Triebraum druckabgesichert sind.Furthermore, a safety device is preferred in which the high pressure area and / or the suction pressure area are pressure-protected via the drive chamber.

Eine weitere erfindungsgemäße Sicherheitseinrichtung zeichnet sich dadurch aus, daß beim Überschreiten des Hochdrucks im Hochdruckbereich das Druckbegrenzungsventil anspricht und dadurch der Klfmakompressor zurückschwenkt.Another safety device according to the invention is characterized in that when the high pressure is exceeded in the high pressure area, the pressure relief valve responds and the pivoting compressor swings back.

Bevorzugte Ausführungsformen der Sicherheitseinrichtung werden nun anhand der Figuren beschrieben.Preferred embodiments of the safety device will now be described with reference to the figures.

Figur 1 zeigt ein SicherheitskonzeptFigure 1 shows a security concept

Figur 2 zeigt ein weiteres Sicherheitskonzept.Figure 2 shows a further security concept.

Figur 1 zeigt eine schematische Darstellung einer derartigen Sicherheitseinrichtung mit dem Sicherheitskonzept für alle drei Druckräume. Ein Druckbegrenzungsventil 30 verbindet den Hochdruckbereich 31 eines hier schematisch dargestellten Kompressors 32 mit dem Triebraumbereich 33. Der Niederdruck- oder Ansaugdruckbereich 34 des Klimakompressors wird über ein Rückschlagventil 35 mit dem Triebraumbereich 33 verbunden. Weiterhin wird der Triebraumbereich 33 über ein Druckbegrenzungsventil 36 mit der Umgebung 37, das heißt mit der Atmosphäre um den Kompressor herum, verbunden. Zur Funktion dieses Sicherheitskonzeptes gehört es, daß bei Überschreiten des maximal zulässigen Druckes im Hochdruckbereich 31 das Druckbegrenzungsventil 30 das geförderte Druckmedium von der Entladeseite in den Kurbelraum abbläst. Dadurch erhöht sich der Triebraumdruck im Triebraum 33, und der Hub des Kompressors wird verringert.Figure 1 shows a schematic representation of such a safety device with the safety concept for all three pressure rooms. A pressure limiting valve 30 connects the high pressure region 31 of a compressor 32, shown schematically here, to the engine compartment region 33. The low pressure or intake pressure region 34 of the air conditioning compressor is connected to the engine compartment region 33 via a check valve 35. Furthermore, the engine area 33 is connected to the environment 37, that is to say the atmosphere around the compressor, via a pressure relief valve 36. It is part of the function of this safety concept that when the maximum permissible pressure in the high-pressure region 31 is exceeded, the pressure relief valve 30 blows off the pressure medium conveyed from the discharge side into the crank chamber. This increases the engine pressure in the engine room 33 and the stroke of the compressor is reduced.

Um eine Absicherung der Ansaugseite im Ansaugdruckbereich 34 des Kompressors zu erreichen, kann weiterhin ein Rückschlagventil 35 zwischen Ansaugseite 34 und Triebraumseite 33 vorgesehen werden, das Fluid von der Ansaugseite in den Triebraum entläßt, wenn der Druck an der Saugseite über dem Druck im Triebraum liegt. Letztendlich kann dann für den Notfall, daß auch der Druck im Triebraum 33 seinen maximal zulässigen Wert übersteigt, das zusätzliche Druckbegrenzungsventil 36 den Druck durch Abblasen des Druckmittels in die Atmosphäre 37 im Triebraum 33 begrenzen. Das ist aber nur für den äußersten Notfall notwendig, da man bei einem erfindungsgemäßen Konzept davon ausgehen kann, daß durch Überschreiten des höchsten Druckes im System, nämlich des Hochdruckes auf der Entladeseite 31 , durch das Druckbegrenzungsventil 30 der Kompressor zurückschwenkt und keine weitereIn order to secure the intake side in the intake pressure area 34 of the compressor, a check valve 35 can also be provided between the intake side 34 and the engine compartment side 33, which releases fluid from the intake side into the engine compartment when the pressure on the intake side is above the pressure in the engine compartment. Finally, in the event of an emergency that the pressure in the drive chamber 33 also exceeds its maximum permissible value, the additional pressure relief valve 36 can be used limit the pressure by blowing off the pressure medium into the atmosphere 37 in the drive chamber 33. But this is only necessary for extreme emergencies, since one can assume with a concept according to the invention that by exceeding the highest pressure in the system, namely the high pressure on the discharge side 31, the compressor pivots back through the pressure limiting valve 30 and no further

Druckerhöhung stattfindet. Zur Vervollständigung des Kreislaufes ist noch die übrigePressure increase takes place. The rest of the cycle is complete

Klimaanlage oder alternativ eine Wärmepumpe schematisch als Block 38 zwischenAir conditioning or alternatively a heat pump schematically as block 38 between

Hochdruckbereich 31 und Saugdruckbereich 34 eingezeichnet.High pressure area 31 and suction pressure area 34 are shown.

Figur 2 zeigt eine Variante des Sicherheitskonzeptes aus Figur 1 , die sich nur dadurch unterscheidet, daß zur Absicherung des Triebraumdruckes das Druckbegrenzungsventil 36 aus Figur 1 durch eine Berstscheibeneinrichtung 39 ersetzt wird.FIG. 2 shows a variant of the safety concept from FIG. 1, which differs only in that the pressure limiting valve 36 from FIG. 1 is replaced by a rupture disk device 39 in order to safeguard the pressure in the drive room.

Das in dieser Anmeldung beschriebene Sicherheitskonzept beseitigt erfindungsgemäß folgende Nachteile, wie zum Beispiel das separate Absichern von Entladeseite und Triebraum und Ansaugseite durch Berststopfen oder abblasende Sicherheitsventile an die Atmosphäre, was den Nachteil von mehr Dichtstellen nach außen mit sich bringt. Durch das eben beschriebene Sicherheitskonzept wird also eine Reduktion der notwendigen Dichtstellen nach außen bzw. eine Reduktion der Anzahl der Berststopfen oder abblasenden Sicherheitsventile herbeigeführt. Außerdem wird die Zahl der Systemausfälle reduziert, weil beim Überschreiten des Drucks auf der Entladeseite kein Verlust der Dichtheit entsteht, da der Kompressor in diesem Fall zunächst zurückschwenkt und zusätzliche Leistung zur Druckerhöhung nicht mehr erzeugt wird.The safety concept described in this application eliminates the following disadvantages according to the invention, such as, for example, the separate securing of the discharge side and drive chamber and suction side by burst plugs or blow-off safety valves to the atmosphere, which has the disadvantage of more sealing points on the outside. The safety concept just described thus brings about a reduction in the necessary sealing points to the outside or a reduction in the number of burst plugs or blow-off safety valves. In addition, the number of system failures is reduced because there is no loss of tightness when the pressure on the discharge side is exceeded, since in this case the compressor swings back and additional power to increase the pressure is no longer generated.

Die mit der Anmeldung eingereichten Patentansprüche sind Formulierungsvorschläge ohne Präjudiz für die Erzielung weitergehenden Patentschutzes. Die Anmelderin behält sich vor, noch weitere, bisher nur in der Beschreibung und/oder den Zeichnungen offenbarte Merkmalskombinationen zu beanspruchen.The patent claims submitted with the application are proposals for formulation without prejudice for the achievement of further patent protection. The applicant reserves the right to claim further combinations of features previously only disclosed in the description and / or the drawings.

In Unteransprüchen verwendete Rückbeziehungen weisen auf die weitere Ausbildung des Gegenstandes des Hauptanspruches durch die Merkmale des jeweiligen Unteranspruches hin; sie sind nicht als ein Verzicht auf die Erzielung eines selbständigen, gegenständlichen Schutzes für die Merkmalskombinationen der rückbezogenen Unteransprüche zu verstehen. Da die Gegenstände der Unteransprüche im Hinblick auf den Stand der Technik am Prioritätstag eigene und unabhängige Erfindungen bilden können, behält die Anmelderin sich vor, sie zum Gegenstand unabhängiger Ansprüche oder Teilungserklärungen zu machen. Sie können weiterhin auch selbständige Erfindungen enthalten, die eine von den Gegenständen der vorhergehenden Unteransprüche unabhängige Gestaltung aufweisen.Back-references used in subclaims indicate the further development of the subject matter of the main claim by the features of the respective subclaim; they are not to be understood as a waiver of the achievement of independent, objective protection for the combinations of features of the related subclaims. Since the subjects of the subclaims can form their own and independent inventions with regard to the prior art on the priority date, the applicant reserves the right to make them the subject of independent claims or declarations of division. They can furthermore also contain independent inventions which have a design which is independent of the objects of the preceding subclaims.

Die Ausführungsbeispiele sind nicht als Einschränkung der Erfindung zu verstehen. Vielmehr sind im Rahmen der vorliegenden Offenbarung zahlreiche Abänderungen und Modifikationen möglich, insbesondere solche Varianten, Elemente und Kombinationen und/oder Materialien, die zum Beispiel durch Kombination oder Abwandlung von einzelnen in Verbindung mit den in der allgemeinen Beschreibung und Ausführungsformen sowie den Ansprüchen beschriebenen und in den Zeichnungen enthaltenen Merkmalen bzw. Elementen oder Verfahrensschritten für den Fachmann im Hinblick auf die Lösung der Aufgabe entnehmbar sind und durch kombinierbare Merkmale zu einem neuen Gegenstand oder zu neuen Verfahrensschritten bzw. Verfahrensschrittfolgen führen, auch soweit sie Herstell-, Prüf- und Arbeitsverfahren betreffen. The exemplary embodiments are not to be understood as a restriction of the invention. Rather, numerous changes and modifications are possible within the scope of the present disclosure, in particular such variants, elements and combinations and / or materials, which, for example, by combining or modifying individual ones in conjunction with and described in and in the general description and embodiments and the claims Features or elements or procedural steps contained in the drawings can be taken by a person skilled in the art with regard to the solution of the task and, by means of combinable features, lead to a new object or to new procedural steps or procedural step sequences, also insofar as they relate to manufacturing, testing and working methods.

Claims

Patentansprüche claims 1. Sicherheitseinrichtung für die Druckbegrenzung eines hubvariablen bzw. verdrängungsvariablen Kompressors, bei dem die Neigung der Taumelscheibe bzw. der Schrägscheibe zumindest durch die Differenz zwischen Hochdruck im1. Safety device for the pressure limitation of a variable stroke or displacement variable compressor, in which the inclination of the swash plate or the swash plate at least by the difference between high pressure in Entladedruckbereich und Triebraumdruck variiert wird, gegebenenfalls durch die Differenz zwischen Triebraumdruck und Saugdruck, mit einer Zufuhrverbindung zwischen Entladedruckbereich und Triebraumdruckbereich, mit einer Ventilvorrichtung, welche in der Zufuhrverbindung angeordnet ist, und gegebenenfalls einer zusätzlichen Verbindung vom Triebraumdruckbereich zumDischarge pressure range and engine pressure is varied, possibly by the difference between engine pressure and suction pressure, with a supply connection between the discharge pressure area and the drive pressure area, with a valve device which is arranged in the supply connection, and optionally an additional connection from the drive pressure area to Saugraumdruckbereich, und mit einem Druckbegrenzungsventil, welches bei Überschreitung eines Hochdruckes im Hochdruckbereich Druckmedium in den Triebraum ablasst, mit einem weiterem Druckbegrenzungsventil oder mit einer Berstscheibe, die bei Drucküberschreitung im Triebraum Druckmedium vom Triebraum in die Umgebung ablasst, dadurch gekennzeichnet, daßSuction chamber pressure range, and with a pressure relief valve, which releases pressure medium into the drive chamber when a high pressure in the high pressure range is exceeded, with a further pressure relief valve or with a rupture disc, which releases pressure medium from the drive chamber into the environment when the pressure in the drive chamber is exceeded, characterized in that Sicherheitseinrichtungen für den Hochdruckbereich, für den Triebraumdruckbereich und für den Saugdruckbereich miteinander funktional gekoppelt sind.Safety devices for the high pressure area, for the engine room pressure area and for the suction pressure area are functionally coupled to one another. 2. Sicherheitseinrichtung, insbesondere nach Anspruch 1 , dadurch gekennzeichnet, daß eine- Rückschlagventileinrichtung zwischen Saugdruckbereich und2. Safety device, in particular according to claim 1, characterized in that a check valve device between the suction pressure area and Triebraumdruckbereich angeordnet ist.Engine compartment pressure area is arranged. 3. Sicherheitseinrichtung, insbesondere nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Hochdruckbereich und/oder der Saugdruckbereich über den Triebraum druckabgesichert sind.3. Safety device, in particular according to claim 1 or 2, characterized in that the high pressure area and / or the suction pressure area are pressure-protected via the drive chamber. 4. Sicherheitseinrichtung, insbesondere nach Anspruch 1 , 2 oder 3, dadurch gekennzeichnet, daß beim Überschreiten des Hochdrucks im Hochdruckbereich das Druckbegrenzungsventil anspricht und dadurch der Klimakompressor zurückschwenkt.4. Safety device, in particular according to claim 1, 2 or 3, characterized in that when the high pressure is exceeded in the high pressure area, the pressure relief valve responds and thereby the air conditioning compressor swings back. 5. Sicherheitseinrichtung für die Druckbegrenzung eines hubvariablen bzw. verdrängungsvariablen Kompressors, bei dem die Neigung der Taumelscheibe bzw. der Schrägscheibe zumindest durch die Differenz zwischen Hochdruck im Entladedruckbereich und Triebraumdruck variiert wird, gegebenenfalls durch die Differenz zwischen Triebraumdruck und Saugdruck, mit einer Zufuhrverbindung zwischen Entladedruckbereich und Triebraumdruckbereich, mit einer5. Safety device for the pressure limitation of a stroke variable or displacement variable compressor, in which the inclination of the swash plate or the swash plate is varied at least by the difference between high pressure in the discharge pressure area and engine pressure, possibly by the Difference between engine pressure and suction pressure, with a supply connection between discharge pressure area and engine pressure range, with a Ventilvorrichtung, welche in der Zufuhrverbindung angeordnet ist, und gegebenenfalls einer zusätzlichen Verbindung vom Triebraumdruckbereich zum Saugraumdruckbereich und mit einem Druckbegrenzungsventil, welches beiValve device, which is arranged in the supply connection, and optionally an additional connection from the engine room pressure area to the suction room pressure area and with a pressure relief valve, which at Überschreitung eines Hochdruckes im Hochdruckbereich Druckmedium in denExceeding a high pressure in the high pressure area Triebraum ablasst, mit einem weiterem Druckbegrenzungsventil oder mit einerDrain the drive room, with a further pressure relief valve or with a Berstscheibe, die bei Drucküberschreitung im Triebraum Druckmedium vomRupture disc, the pressure medium from the pressure medium in the drive room Triebraum in die Umgebung ablasst, gekennzeichnet durch mindestens ein in den Anmeldeunterlagen offenbartes erfinderisches Merkmal. Triebraum drains into the environment, characterized by at least one inventive feature disclosed in the application documents.
PCT/DE2001/002390 2000-07-06 2001-06-27 Safety device for an air-conditioning compressor Ceased WO2002002942A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10193283T DE10193283D2 (en) 2000-07-06 2001-06-27 Safety device for air conditioning compressor
AU2001275655A AU2001275655A1 (en) 2000-07-06 2001-06-27 Safety device for an air-conditioning compressor

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10032905 2000-07-06
DE10032905.5 2000-07-06
DE10058006.8 2000-11-23
DE10058006 2000-11-23

Publications (1)

Publication Number Publication Date
WO2002002942A1 true WO2002002942A1 (en) 2002-01-10

Family

ID=26006304

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2001/002390 Ceased WO2002002942A1 (en) 2000-07-06 2001-06-27 Safety device for an air-conditioning compressor

Country Status (5)

Country Link
AU (1) AU2001275655A1 (en)
DE (2) DE10193283D2 (en)
FR (1) FR2812038B1 (en)
IT (1) ITMI20011432A1 (en)
WO (1) WO2002002942A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004042232A1 (en) * 2002-11-07 2004-05-21 Luk Fahrzeug-Hydraulik Gmbh & Co. Kg Compressor
WO2007054243A1 (en) * 2005-11-09 2007-05-18 Ixetic Mac Gmbh Air-conditioning compressor with a differential-pressure limiting device
WO2015086326A1 (en) * 2013-12-13 2015-06-18 Magna Powertrain Bad Homburg GmbH Air conditioning compressor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19810789A1 (en) * 1997-03-13 1998-09-17 Toyoda Automatic Loom Works Motor vehicle air conditioning cooling circuit with compressor and expansion valve connected to the evaporator and condenser
EP0952346A2 (en) * 1998-04-14 1999-10-27 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Swash plate compressor with fixed or variable capacity
EP0992747A2 (en) * 1998-10-05 2000-04-12 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Air conditioning systems
EP1004834A2 (en) * 1998-11-24 2000-05-31 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Air conditioning systems
EP1014016A2 (en) * 1998-12-21 2000-06-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Air conditioning systems

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19810789A1 (en) * 1997-03-13 1998-09-17 Toyoda Automatic Loom Works Motor vehicle air conditioning cooling circuit with compressor and expansion valve connected to the evaporator and condenser
EP0952346A2 (en) * 1998-04-14 1999-10-27 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Swash plate compressor with fixed or variable capacity
EP0992747A2 (en) * 1998-10-05 2000-04-12 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Air conditioning systems
EP1004834A2 (en) * 1998-11-24 2000-05-31 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Air conditioning systems
EP1014016A2 (en) * 1998-12-21 2000-06-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Air conditioning systems

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004042232A1 (en) * 2002-11-07 2004-05-21 Luk Fahrzeug-Hydraulik Gmbh & Co. Kg Compressor
CN100395450C (en) * 2002-11-07 2008-06-18 卢克汽车-液压系统两合公司 Compressor
US7874309B2 (en) 2002-11-07 2011-01-25 Luk Fahrzeug-Hydraulik Gmbh & Co. Kg Compressor
WO2007054243A1 (en) * 2005-11-09 2007-05-18 Ixetic Mac Gmbh Air-conditioning compressor with a differential-pressure limiting device
KR101261398B1 (en) 2005-11-09 2013-05-07 익세틱 마크 게엠베하 Air Conditioning Compressor with Differential Pressure Control
WO2015086326A1 (en) * 2013-12-13 2015-06-18 Magna Powertrain Bad Homburg GmbH Air conditioning compressor

Also Published As

Publication number Publication date
FR2812038A1 (en) 2002-01-25
ITMI20011432A1 (en) 2003-01-05
ITMI20011432A0 (en) 2001-07-05
FR2812038B1 (en) 2006-12-15
DE10193283D2 (en) 2003-05-15
AU2001275655A1 (en) 2002-01-14
DE10130843A1 (en) 2002-02-28

Similar Documents

Publication Publication Date Title
DE3633489C2 (en)
DE102013008047A1 (en) Variable speed drive with two pumps and one differential cylinder
DE3142230A1 (en) MULTI-CYLINDER COMPRESSOR
EP1297256B1 (en) Safety device for an air-conditioning compressor
DE3603931A1 (en) Swash plate compressor with variable stroke
DE10251803A1 (en) compressor
DE102020210196A1 (en) PROCESS FOR REALIZING A TORQUE AND SPEED INTERFACE FOR HYDROSTATIC TRAVEL DRIVES WITH LIMITABLE PERFORMANCE
DE10146579A1 (en) Power transmission mechanism
DE102007004130A1 (en) Adjustable compressor for use in compressing refrigerant in positive displacement pump and in air conditioning system has oil separation device, which is provided for separating lubricant from compressed and circulated cooling agent
DE102010020690B4 (en) Hydraulic drive system
WO2002002942A1 (en) Safety device for an air-conditioning compressor
EP2049800A1 (en) Feed pump
EP0897365B1 (en) Helicopter swash plate with integrated pump
DE102020200256A1 (en) SCROLL COMPRESSORS
DE102011108285A1 (en) Hydraulic drive
DE102019119944A1 (en) Valve device for a reciprocating compressor
EP0922165B1 (en) Vacuum pump
DE2201563A1 (en) Compressor unit for cooling systems
DE102012024362A1 (en) compressor
DE102006039698B3 (en) Feed pump for feeding hydraulic medium to internal combustion engine of motor vehicle, has pump controller adjusting feed pump toward maximum delivery, if system pressure is smaller than minimum pressure
EP1725771B1 (en) Compressor, especially axial piston compressor for a vehicle air conditioning system
DE102009004333A1 (en) Compressor, particularly axial piston compressor for motor vehicle air conditioning systems, has suction gas inlet arranged at suction side, and fluidic connection is arranged between drive gear chamber and suction gas volume
EP0367038B1 (en) Hydraulic steering system and automotive works-vehicle provided with such a steering system
EP3091230B1 (en) Hydrostatic piston machine
WO2012163619A1 (en) Compressor having pressure limitation

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP