WO2003083299A1 - Compresseur pour systeme de climatisation d'un vehicule - Google Patents

Compresseur pour systeme de climatisation d'un vehicule Download PDF

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Publication number
WO2003083299A1
WO2003083299A1 PCT/EP2003/002410 EP0302410W WO03083299A1 WO 2003083299 A1 WO2003083299 A1 WO 2003083299A1 EP 0302410 W EP0302410 W EP 0302410W WO 03083299 A1 WO03083299 A1 WO 03083299A1
Authority
WO
WIPO (PCT)
Prior art keywords
compressor
oil
drive shaft
refrigerant
bore
Prior art date
Application number
PCT/EP2003/002410
Other languages
German (de)
English (en)
Inventor
Christoph Loy
Klaus Gebauer
Heiko Dröse
Thomas Reske
Harry Nissen
Dikran-Can Magzalci
Thomas Küppers
Henry Hartung
Original Assignee
Volkswagen Aktiengesellschaft
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 Volkswagen Aktiengesellschaft filed Critical Volkswagen Aktiengesellschaft
Publication of WO2003083299A1 publication Critical patent/WO2003083299A1/fr

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
    • F04B27/109—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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/16—Filtration; Moisture separation

Definitions

  • the invention relates to a compressor for a vehicle air conditioning system for drawing in and compressing CO 2 refrigerants circulating in a closed circuit, the compressor being driven either mechanically or electrically.
  • the compressors used in motor vehicle air conditioning systems for drawing in and compressing CO 2 refrigerants usually have a drive shaft for a swash plate (swash plate) which acts on at least one piston which is displaceably held in a cylinder for sucking in and compressing CO 2 refrigerants.
  • the drive shaft can be coupled to the internal combustion engine of the motor vehicle via a pulley and a V-belt or connected to a speed-controlled electric motor arranged in or on the compressor housing.
  • the number of revolutions of the drive shaft is proportional to the speed of the internal combustion engine, so that the control of the output of the compressor takes place via a change in the inclination of the swash plate.
  • the power is controlled by regulating the speed of the electric motor. An adjustment of the swash plate is therefore not necessary, so that it is firmly connected to the drive shaft with an unchangeable angle of inclination.
  • the CO 2 refrigerant flows through the compressor in different ways in the two drive types, but it is inevitable in both types of compressor that oil enters the CO 2 refrigerant circuit, which is intended for the lubrication of the moving parts in the compressor ,
  • an oil separator downstream of the compressor outlet in the refrigerant circuit on the high-pressure side, which is connected to the crankcase chamber of the compressor via an oil return line.
  • the oil separated from the CO 2 refrigerant flow by this oil separator is returned through the oil return line to the crankcase chamber of the compressor for lubrication of the moving parts.
  • Such an external oil separator is present, for example, in a vehicle air conditioning system described in EP 0 742 116 B1.
  • the object of the invention is to design a compressor according to the preamble of claim 1 so that the oil pressure is simplified from the CO 2 refrigerant. This object is achieved in a compressor according to the preamble of claim 1 by the characterizing features. Advantageous configurations are listed in the subclaims.
  • the invention consists in that an oil separator assigned to a compressor in the CO 2 refrigerant circuit for returning oil absorbed by the refrigerant (CO 2 refrigerant) and for ensuring the oil lubrication of the moving parts arranged in the crankcase space of the compressor on the output side of the compressor in the compressor housing is integrated, the output side of the oil separator for oil pressure routing being connected to the crankcase space of the compressor.
  • This advantageously eliminates the need for an external oil separator, so that the number of components in the air conditioning system is reduced.
  • the oil is returned by the shortest route to the moving parts and the bearing points in the compressor.
  • the compressor is provided with an output side arranged on said housing cover having an annular inlet chamber for the material to be compressed CO 2 refrigerant and a high-pressure chamber for the compressed CO 2 refrigerant, wherein the high-pressure chamber accommodates the oil separator.
  • CO 2 refrigerant compressed in the cylinders of the compressor is pressed through an outlet valve into the high-pressure chamber and thus also directly into the oil separator and into the refrigerant circuit in the direction of a gas cooler.
  • Oil entrained in the refrigerant is separated from it and directed at the outlet of the oil separator into a return channel in the housing cover, which is designed essentially in the axial direction, through which it is fed back dropwise into the compressor, the oil passing through between the high-pressure chamber in the housing cover and the crankcase chamber with the moving parts of the compressor given pressure difference is fed back into this.
  • This return channel which is formed in the housing cover and runs in the axial direction, can advantageously correspond to a bushing arranged in the cylinder block of the compressor to form a cavity in which the drive shaft for a swash plate (swash plate) is mounted with its end on the housing cover side, so that the drive shaft bearing is supplied directly with oil become.
  • the drive shaft can be provided with an axial bore and radial bores emanating therefrom, which in turn are connected to the crankcase chamber of the compressor are.
  • the reciprocating pistons axially movable in the cylinder block are lubricated. In order to improve their lubrication, they can each have a groove in their piston running surface, which is of a spiral shape or runs at an acute angle to the axis thereof.
  • the oil circuit can be optimized via the diameter of the axial shaft bore and, depending on the expected output of the compressor, can be adapted to the amount of oil required for lubrication. So that a large number of drive shafts with different bore diameters do not have to be used for compressors of different capacities, a unit drive shaft with a specific bore diameter can be used, which is provided with an orifice at the entrance of its bore depending on the respective compressor Hole cross-section reduced. In a simple manner, this diaphragm can be introduced into an end recess on the drive shaft and screwed to it.
  • this can be done bypassing the cylinder block arranged in the compressor housing via an oil outlet channel formed in the housing cover in the radial direction and a subsequent oil line with an electrically controllable 2- or 3-way valve, the oil line section connecting to this valve is directly connected to the crankcase space.
  • the oil line with the valve is arranged on the outside of the compressor housing.
  • the compressor an electric compressor with an electric motor arranged in the compressor housing, in which the CO 2 refrigerant is let in through the end wall on the side of the electric motor and then penetrates the compressor housing via through-holes to the housing cover with the suction chamber and the high-pressure chamber with the oil separator, in order to then compress it the If the compressor is pushed into the refrigerant circuit, the oil separation can largely be carried out in the compressor housing.
  • the bottom of the compressor housing is formed under the electric motor so that an oil sump forms there due to the gravity of the oil mixed with the CO 2 refrigerant. In the area of the oil sump that forms, the bottom is provided with elongated depressions formed in the axial direction, in which separated oil can collect.
  • the oil residue which is still present during the compression of the CO 2 refrigerant, is then essentially separated in the oil separator arranged in the high-pressure chamber and, due to the pressure difference between the crankcase chamber of the compressor and the high-pressure chamber, sucked back into the compressor housing, again again Drive shaft with an axial bore can be used for oil transport. Oil is thus separated in three areas of the compressor, which optimizes the oil separation.
  • the arrangement of, in particular, elongated depressions in the bottom of the compressor housing, via which the CO 2 refrigerant is sucked, has the additional advantage that the power electronics arranged in this area are cooled.
  • Sleeves are used as sleeve oil separators, one opening of which is spanned by a two-dimensional wire mesh.
  • the oil separator arranged in the high-pressure chamber of the housing cover is a three-dimensional wire bond.
  • Fig. 6 a reciprocating piston design.
  • the compressor for compressing CO 2 refrigerant which is mechanically driven via a pulley (not shown) and is shown in FIG. 1, essentially has a compressor housing 1, a drive shaft 3, which is connected in a rotationally fixed manner via a feather key 2 to a pulley (not shown), a low pressure chamber 4 for a on the drive shaft 3 rotatably and in its inclination adjustable (swash) swash plate 5, a cylinder block 6 with a plurality of compression cylinders 7, in this arranged and operatively connected to the swash plate 5 reciprocating piston 8, a valve plate 9 and on the end facing away from the pulley, at the same time Output side of the compressor, a housing cover 10.
  • valve plate 9 has a suction opening 14 and an outlet opening 15 for each compression cylinder 7, wherein the suction openings 14 are each connected to the suction chamber 11 via a suction valve, not shown, and the outlet openings 15 are each connected to the high-pressure chamber 12 via an outlet valve 16.
  • the drive shaft 3 is rotatably supported by a radial bearing 16 on the cylinder block 6 and a radial bearing 17 on the compressor housing 1, as well as by an axial bearing 19 on the valve plate 9 in the axial direction by a compression spring 18 and on the cylinder block 7, and one on the compressor housing 1 supported axial bearing 20 is supported in the axial direction and has a central bore 21 for oil pressure guidance and two radial bores 22 in the region of its drive-side mounting.
  • a cover B on the housing cover side at the entrance of the bore 21. This (B) is shown more clearly in FIG. 2 and the detail X.
  • the aperture B has a bore BB with a smaller bore diameter than the bore 22 to reduce the oil flow.
  • a return channel 23 open on the high-pressure chamber side, for collecting and returning separated oil is formed, which is connected to its interior 26 via a bore 24 arranged in the valve plate 9 and a passage 25 in the cylinder block 6 is.
  • the CO 2 refrigerant circulating in it which carries oil particles with it, is sucked through the driven reciprocating pistons 8 into the suction chamber 11 and is successively sucked through the respective suction valve and the suction opening 14 into the respective compression cylinder 7, where it is compressed and via the outlet opening 15 and the outlet valve 16 into the high-pressure chamber 12 and through the oil separator 13 into the high-pressure line (not shown) connected to the compressor and leading to a condenser.
  • oil separator 13 oil carried along in the CO 2 refrigerant and additionally taken up in the compression cylinders 7, which is located on the cylinder walls as an oil film for lubricating the reciprocating pistons 8, is largely separated in drops.
  • the separated oil collects in the oil return duct 23 arranged on the underside of the high-pressure chamber 12 and is sucked into the interior 26 of the cylinder block 6 by the pressure difference between the crankcase chamber 4 and the high-pressure chamber 12 via the bore 24 and the passage 25. There it arrives at the bearings 16 and 19 and in the bore 21, via this and the bores 22 to the bearings 17 and 20 and in the crankcase space 4 and to the moving parts arranged therein, so also to the reciprocating pistons 8 and in the Compression cylinder 7, where it is partially sucked off on the housing cover side and pressed into the high-pressure chamber 12.
  • the oil that is not separated in the oil separator 13 is returned to the refrigerant circuit with the CO 2 refrigerant, via which it also returns to the suction chamber 11.
  • the mechanical compressor shown in FIG. 3 of basically the same type has an oil return line 28 provided with a 2-way valve 27 and connected to a return duct K formed in the housing cover 10 instead of an input shaft provided with an axial bore for returning the oil separated in the oil separator 13 on, which opens into the crankcase space 4 of the compressor.
  • the flow rate can be regulated via this 2-way valve 27.
  • a 3-way valve 29 can also be arranged in the oil return line 28, which is additionally connected via a line 30 to the suction chamber 11 in order to accelerate the oil return.
  • FIGS. 4 and 5 which are shown largely schematically in FIGS. 4 and 5, essentially have a compressor housing 31, an electric motor 32 that can be controlled via the control frequency, a drive shaft 33 connected to it, a crankcase space 34 for a swash plate 35 arranged on the drive shaft 33 in a rotationally fixed manner Inclination, a cylinder block 36 with a plurality of compression cylinders 37 with reciprocating pistons 38 arranged therein and operatively connected to the swash plate 35, a valve plate 39 and a housing cover 40.
  • This (40) is constructed in the same way as in the mechanically driven compressor described above and also houses an oil separator 41.
  • the inlet for the CO 2 refrigerant is arranged in the end wall opposite the housing cover 40.
  • the CO 2 refrigerant flow that carries oil particles is sucked through the compressor housing 31 into the suction chamber 11 when the compressor is operating. He passes through several areas.
  • elongated, trough-like depressions 42 for oil separated in this area and forming an oil sump S are formed under this (32), which at the same time serve as a guiding device for the CO 2 refrigerant flow to the suction chamber 11 and from it serve to the compression cylinders 37.
  • the flow of refrigerant takes oil particles from this oil sump S and is drawn through bushings 44 in the intermediate wall 43 formed between the arrangement space for the electric motor 32 and the low-pressure space 34 (crankcase) through this (34) and also reaches those located therein and moving parts, such as the swash plate 35, the piston 38 mounted thereon and the bearings of the Drive shaft 33 (not marked any further) which are lubricated by the oil carried along.
  • the CO 2 refrigerant flow is sucked out of the crankcase space 34 through lead-through ducts 45 introduced into the cylinder block 36 into the suction space 11, 45 sleeve oil separators 46 being arranged at the entrance of the lead-through ducts, which contain part of the oil carried in the drawn-in CO 2 refrigerant flow in the crankcase space 34 hold back.
  • the CO 2 refrigerant reaches the compression cylinders 37 and is compressed in these, as in the compressor according to FIG. 1 or 3, and fed to a condenser.
  • the oil that has not yet been separated off is essentially separated off by the oil separator 41 and, as in the mechanical compressors described above, is returned to the compressor housing, a drive shaft with an axial bore also being able to be used again. It is also advantageous in this embodiment that the power electronics 47 arranged under the recesses 42 on the compressor housing 31 for cooling the electric motor 32 and regulating the compressor are cooled by the CO 2 refrigerant flow.
  • an oil pump can be used in conjunction with a drive shaft which has an axial bore and radial bores formed in the region of the crankcase. This is mounted on the drive shaft in the area of the oil sump and sucks oil from the oil sump into the axial bore via a radial bore and presses it through this bore and the radial bores arranged in the area of the crankcase space into the crankcase space.
  • the arrangement of such an oil pump is particularly recommended for a vertically arranged compressor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)

Abstract

L'invention concerne un compresseur pour système de climatisation d'un véhicule, destiné à l'aspiration et à la compression du fluide frigorigène CO2, comprenant des moyens de graissage à l'huile des pièces agencées dans le carter moteur et mis en mouvement par un arbre d'entraînement pour un disque à denture hélicoïdale, et au moins un séparateur d'huile associé au compresseur, pour le retour de l'huile absorbée par le frigorigène CO2 et pour assurer le graissage. L'invention a pour but d'obtenir un compresseur de ce type, agencé de telle façon que le retour de l'huile provenant du fluide frigorigène soit simplifié. A cet effet, le séparateur d'huile (13, 41) est intégré, sortie compresseur, au carter moteur (1, 31), et le séparateur d'huile (13, 41) est raccordé, pour le retour de l'huile, au carter (4, 34) du compresseur.
PCT/EP2003/002410 2002-03-28 2003-03-10 Compresseur pour systeme de climatisation d'un vehicule WO2003083299A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10214045.6 2002-03-28
DE10214045.6A DE10214045B4 (de) 2002-03-28 2002-03-28 R 744-Kompressor für eine Fahrzeug-Klimaanlage

Publications (1)

Publication Number Publication Date
WO2003083299A1 true WO2003083299A1 (fr) 2003-10-09

Family

ID=27816047

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/002410 WO2003083299A1 (fr) 2002-03-28 2003-03-10 Compresseur pour systeme de climatisation d'un vehicule

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WO (1) WO2003083299A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004061237A1 (de) * 2004-12-20 2006-07-06 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Trockenlaufender Taumelscheibenverdichter mit einer beschichteten Taumelscheibe
DE102020112664A1 (de) * 2020-05-11 2021-11-11 OET GmbH Hubkolbenkompressor zur Erzeugung ölfreier Druckluft
DE102020132891A1 (de) 2020-12-10 2022-06-15 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Schallschutzdämpfer, Kältemittelsystem, Fahrzeug und Verfahren zu deren Herstellung
CN118030472B (zh) * 2024-03-04 2024-08-13 浙江邦烨自动化科技有限公司 一种用于电缸的排压机及其使用方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0736690A2 (fr) * 1995-04-07 1996-10-09 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Structure de refroidissment pour compresseur
EP0789145A1 (fr) * 1995-06-05 1997-08-13 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Piston pour compresseur et compresseur du type a piston
EP0943802A2 (fr) * 1998-03-16 1999-09-22 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Compresseur à plateau en biais à capacité variable avec un séparateur d'huile
US5997257A (en) * 1997-01-28 1999-12-07 Zexel Corporation Refrigerant compressor
EP0971129A2 (fr) * 1998-07-09 2000-01-12 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Compresseur volumétrique pour réfrigérant avec système de séparation d'huile et de lubrification
US6015269A (en) * 1996-12-10 2000-01-18 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Variable displacement compressor
US6129532A (en) * 1998-02-24 2000-10-10 Denso Corporation CO2 compressor
US6237362B1 (en) * 1999-12-30 2001-05-29 Halla Climate Control Corp. Internal oil separator for compressors of refrigeration systems
EP1162371A1 (fr) * 1999-12-14 2001-12-12 Kabushiki Kaisha Toyota Jidoshokki Compresseur et son procede de graissage

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Publication number Priority date Publication date Assignee Title
US4392788A (en) * 1980-08-15 1983-07-12 Diesel Kiki Co., Ltd. Swash-plate type compressor having oil separating function
US5214937A (en) * 1991-10-28 1993-06-01 Carrier Corporation Integral oil separator and muffler
CH689826A5 (de) * 1995-05-10 1999-12-15 Daimler Benz Ag Fahrzeug-Klimaanlage.
JPH09324758A (ja) * 1996-06-06 1997-12-16 Toyota Autom Loom Works Ltd カムプレート式圧縮機
JPH10196540A (ja) * 1997-01-10 1998-07-31 Toyota Autom Loom Works Ltd 圧縮機
JPH10311277A (ja) * 1997-05-13 1998-11-24 Zexel Corp 冷媒圧縮機
DE19954570A1 (de) * 1999-11-12 2001-08-02 Zexel Valeo Compressor Europe Axialkolbenverdichter

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0736690A2 (fr) * 1995-04-07 1996-10-09 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Structure de refroidissment pour compresseur
EP0789145A1 (fr) * 1995-06-05 1997-08-13 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Piston pour compresseur et compresseur du type a piston
US6015269A (en) * 1996-12-10 2000-01-18 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Variable displacement compressor
US5997257A (en) * 1997-01-28 1999-12-07 Zexel Corporation Refrigerant compressor
US6129532A (en) * 1998-02-24 2000-10-10 Denso Corporation CO2 compressor
EP0943802A2 (fr) * 1998-03-16 1999-09-22 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Compresseur à plateau en biais à capacité variable avec un séparateur d'huile
EP0971129A2 (fr) * 1998-07-09 2000-01-12 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Compresseur volumétrique pour réfrigérant avec système de séparation d'huile et de lubrification
EP1162371A1 (fr) * 1999-12-14 2001-12-12 Kabushiki Kaisha Toyota Jidoshokki Compresseur et son procede de graissage
US6237362B1 (en) * 1999-12-30 2001-05-29 Halla Climate Control Corp. Internal oil separator for compressors of refrigeration systems

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Publication number Publication date
DE10214045B4 (de) 2015-07-16
DE10214045A1 (de) 2003-10-09

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