EP1784573B1 - Compressor - Google Patents

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Publication number
EP1784573B1
EP1784573B1 EP05774251.2A EP05774251A EP1784573B1 EP 1784573 B1 EP1784573 B1 EP 1784573B1 EP 05774251 A EP05774251 A EP 05774251A EP 1784573 B1 EP1784573 B1 EP 1784573B1
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EP
European Patent Office
Prior art keywords
compressor
refrigerant
compressor according
region
diameter
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
Application number
EP05774251.2A
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German (de)
French (fr)
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EP1784573A1 (en
Inventor
Jan Hinrichs
Thomas Di Vito
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ixetic Bad Homburg GmbH
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ixetic Bad Homburg GmbH
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Publication of EP1784573A1 publication Critical patent/EP1784573A1/en
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Publication of EP1784573B1 publication Critical patent/EP1784573B1/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
    • 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
    • F04B39/02—Lubrication
    • F04B39/0284—Constructional details, e.g. reservoirs in the casing
    • 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
    • F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
    • 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
    • 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
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication
    • 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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making

Definitions

  • the publication DE 10145785 A1 shows, for example, a compressor in which a cyclone 101 and a spring-loaded ball valve 103 are integrated.
  • the cyclone 101 is, as is often the case in the prior art, a stepped insert and thus requires a lot of material and installation space.
  • valve is a control valve which regulates the diverted partial flow from the discharge pressure region to the drive chamber and thus also the drive chamber pressure.
  • control valve 21 Since this control valve directs a portion of the refrigerant flow directly into the drive chamber and thus also the main portion of the lubricant which has deposited here in the lubricant according to the invention, the drive chamber is thus supplied by the shortest route with the appropriate lubricant, while the largely freed from the lubricant Refrigerant is supplied in a main flow through the interior 15 of the sleeve 7 to the outlet 17 to the air conditioner.
  • the control valve 21 has sealing rings 23 and 25 and thus seals in its function at the same time from the stepped bore of the lubricant with.

Abstract

The compressor has a drive with adjustable swept volume for the intake and compression of a refrigerant, and lubricants separator to separate the lubricant from the refrigerant in the expansion region of the compressor. The lubricant is introduced to the drive by means of a partial flow branching off from the high-pressure refrigerant flow.

Description

Die Erfindung betrifft einen Kompressor, wie Klimakompressor für Kraftfahrzeuge, mit einem Triebwerk zum Ansaugen und Komprimieren eines Kältemittels und mit einem Schmiermittelabscheider, welcher im Entladedruckbereich des Kompressors Schmiermittel aus dem Kältemittel abscheidet, wobei das Schmiermittel mittels eines vom Hochdruck-Kältemittelstrom abgezweigten Teilstroms dem Triebwerk zugeführt wird.The invention relates to a compressor, such as air conditioning compressor for motor vehicles, with an engine for sucking and compressing a refrigerant and a lubricant separator, which deposits lubricant from the refrigerant in the discharge pressure region of the compressor, wherein the lubricant supplied by means of a branched off from the high-pressure refrigerant flow partial flow to the engine becomes.

Derartige Schmiermittelabscheider sind bekannt. So gibt es beispielsweise Schmiermittelabscheider, die durch die Bohrung des Entladedruckanschlusses montiert werden. Damit ergibt sich beispielsweise ein großer Bohrungsdurchmesser des Hochdruck-/Entladedruckanschlusses und damit ein großer äußerer Montageraumbedarf im Bereich des Anschlusses. Auch gibt es Schmiermittelabscheider, die durch mehrstufige Einsätze mit verschiedenen Durchmessern dargestellt sind und in eine entsprechende Bohrung eingesetzt werden. Auch diese Bauform erfordert einen hohen Aufwand an Material und Einbauraum.Such lubricant separators are known. For example, there are lubricant separators that are mounted through the bore of the discharge pressure port. This results, for example, in a large bore diameter of the high-pressure / discharge pressure connection and thus a large external mounting space requirement in the region of the connection. There are also Schmiermittelabscheider, which are represented by multi-stage inserts with different diameters and are used in a corresponding hole. This design also requires a lot of material and installation space.

Die Druckschrift DE 10145785 A1 (D1) zeigt beispielsweise einen Verdichter, in welchem ein Zyklonabscheider 101 und ein federbelastetes Kugelventil 103 integriert sind. Der Zyklonabscheider 101 ist, wie oft im Stand der Technik, ein gestuftes Einsatzteil und erfordert damit einen hohen Aufwand an Material und Einbauraum.The publication DE 10145785 A1 (D1) shows, for example, a compressor in which a cyclone 101 and a spring-loaded ball valve 103 are integrated. The cyclone 101 is, as is often the case in the prior art, a stepped insert and thus requires a lot of material and installation space.

Es ist daher Aufgabe der Erfindung, einen Kompressor darzustellen, der diese Nachteile nicht aufweist.It is therefore an object of the invention to present a compressor which does not have these disadvantages.

Die Aufgabe wird gelöst durch einen Kompressor, wie Klimakompressor für Kraftfahrzeuge, mit einem Triebwerk zum Ansaugen und Komprimieren eines Kältemittels und mit einem Schmiermittelabscheider, welcher im Entladedruckbereich des Kompressors Schmiermittel aus dem Kältemittel abscheidet, wobei das Schmiermittel mittels eines vom Hochdruck-Kältemittelstrom abgezweigten Teilstroms dem Triebwerk zugeführt wird, wobei erfindungsgemäß der Kompressor im Entladedruckbereich in einem Gehäusebauteil eine Stufenbohrung mit einem kleinen und einem großen Durchmesser aufweist und gekennzeichnet durch eine in dem kleinen Durchmesser eingesetzte einfache Hülse mit einem einzigen Durchmesser, welche teilweise in den Teil der Stufenbohrung mit dem großen Durchmesser hereinragt.The object is achieved by a compressor, such as air conditioning compressor for motor vehicles, with an engine for sucking and compressing a refrigerant and with a lubricant, which deposits lubricant in the discharge pressure region of the compressor from the refrigerant, the lubricant by means of a branched off from the high-pressure refrigerant flow partial flow the Engine is supplied, according to the invention, the compressor in the discharge pressure region in a housing member has a stepped bore with a small and a large diameter and characterized by a small diameter used in the single diameter single sleeve, which partially in the portion of the stepped bore with the large diameter that sticks out.

Das hat den Vorteil, dass als Einsatz nur eine einfache Hülse mit einem einzigen Durchmesser verwendet werden kann und nur die Bohrung in dem entsprechenden Gehäusebauteil des Kompressors gestuft ist, wobei eine Bohrung einfacher herzustellen ist als ein Außendurchmesser eines Drehteils wie im Stand der Technik.This has the advantage that only a single sleeve with a single diameter can be used as the insert and only the hole in the corresponding housing component is stepped of the compressor, wherein a bore is easier to manufacture than an outer diameter of a rotary member as in the prior art.

Bevorzugt wird ein Kompressor, bei welchem in die Stufenbohrung in dem Bereich, der durch den großen Durchmesser und die hereinragende Hülse gebildet wird, tangential am Außenumfang der Bohrungswand mit dem großen Durchmesser eine Bohrung aus dem unmittelbaren Entladedruckbereich des Zylinderkopfs einmündet.Preferred is a compressor in which in the stepped bore in the area formed by the large diameter and the projecting sleeve tangentially opens on the outer circumference of the bore wall with the large diameter bore from the immediate discharge pressure region of the cylinder head.

Weiterhin wird ein Kompressor bevorzugt, bei welchem die Stufenbohrung als separate Bohrung im Wesentlichen radial von außen in den Zylinderkopf eingebracht ist. Die Stufenbohrung wird also nicht axial von innen wie im Stand der Technik, d.h. vom Druckraum des Zylinderkopfes her eingebracht, so dass bei der Erfindung eine Montage der Hülse in vorteilhafter Weise auch nach der Montage des Zylinderkopfes erfolgen kann.Furthermore, a compressor is preferred in which the stepped bore is introduced as a separate bore substantially radially from the outside into the cylinder head. The stepped bore is therefore not axially from the inside as in the prior art, i. introduced from the pressure chamber of the cylinder head, so that in the invention, a mounting of the sleeve can be done in an advantageous manner even after the assembly of the cylinder head.

Ein erfindungsgemäßer Kompressor zeichnet sich dadurch aus, dass die Stufenbohrung zusätzlich ein Ventil aufnimmt, welches die Bohrung verschließt und damit nach außen abdichtet.An inventive compressor is characterized in that the stepped bore additionally receives a valve which closes the bore and thus seals to the outside.

Das hat den Vorteil, dass die Stufenbohrung nicht durch ein separates Verschlussbauteil abgedichtet werden muss.This has the advantage that the stepped bore does not have to be sealed by a separate closure component.

Bevorzugt wird auch ein Kompressor, bei welchem das Ventil ein Regelventil darstellt, welches den abgezweigten Teilstrom vom Entladedruckbereich zum Triebraum und damit auch den Triebraumdruck regelt.Also preferred is a compressor in which the valve is a control valve which regulates the diverted partial flow from the discharge pressure region to the drive chamber and thus also the drive chamber pressure.

Das hat den Vorteil, dass das Schmiermittel direkt ohne Umlenkung in das Triebraumdruck-Regelventil geleitet wird und sich nicht vorher an irgendwelchen Umlenkungen in der Leitung niederschlagen kann.This has the advantage that the lubricant is passed directly without deflection in the drive chamber pressure control valve and can not previously precipitate on any deflections in the line.

Auch wird ein Kompressor bevorzugt, bei welchem das Ventil ein Druckbegrenzungsventil darstellt, welches bei Überschreiten eines maximalen Druckes einen Entlastungsdruckstrom in den Triebraum zulässt.Also, a compressor is preferred in which the valve is a pressure relief valve, which allows a relief pressure flow into the drive chamber when a maximum pressure is exceeded.

Ein erfindungsgemäßer Kompressor zeichnet sich dadurch aus, dass die Stufenbohrung mit ihrem Bereich des kleinen Durchmessers in eine zweite Bohrung mündet, welche den Auslassanschluss für den Entladedruckbereich des Kältemittels darstellt. Das hat den Vorteil, dass der Durchmesser des Auslassanschlusses im Entladedruckbereich des Kältemittels sehr klein gehalten werden kann und damit die Außenanschlüsse des Kompressors keinen großen Bauraum einnehmen.A compressor according to the invention is characterized in that the stepped bore opens with its region of small diameter into a second bore, which constitutes the outlet connection for the discharge pressure region of the refrigerant. That has the advantage, that the diameter of the outlet port in the discharge pressure region of the refrigerant can be kept very small and thus the external connections of the compressor do not occupy a large space.

Weiterhin wird ein Kompressor bevorzugt, bei welchem die Montage der Hülse in dem kleinen Durchmesserbereich der Stufenbohrung von der so genannten Ventilseite her durch Einpressen erfolgen kann. Das hat den Vorteil, dass nach Montage des Kompressors, wenn also schon der Zylinderkopf fertig montiert ist, der Schmiermittelabscheider durch Einpressen der Hülse vor Einbringen des Ventils eingesetzt werden kann und auch später bei fertig montiertem Kompressor einfach nur durch Demontage des Ventils wieder zugänglich ist.Furthermore, a compressor is preferred, in which the assembly of the sleeve in the small diameter portion of the stepped bore can be done by the so-called valve side by pressing. This has the advantage that after assembly of the compressor, so if already the cylinder head is fully assembled, the lubricant can be used by inserting the sleeve before inserting the valve and also later in fully assembled compressor just by disassembly of the valve is accessible again.

Weiterhin wird ein Kompressor bevorzugt, bei welchem der Durchmesser des Auslassanschlusses für den Entladedruckbereich des Kältemittels sehr klein gehalten werden kann, vorzugsweise in einem Bereich von 5-7 mm.Furthermore, a compressor is preferred in which the diameter of the outlet port for the discharge pressure region of the refrigerant can be kept very small, preferably in a range of 5-7 mm.

Die Erfindung wird nun anhand der Figur beschrieben.The invention will now be described with reference to the figure.

Die einzige Figur zeigt einen Querschnitt durch ein Kompressorbauteil mit dem erfindungsgemäßen Schmiermittelabscheider. Im Schnitt ist ein Teil eines Kompressorbauteils 1, beispielsweise ein Schnitt durch den Zylinderkopf eines Kompressors, dargestellt. Im Schnitt ist in diesem Kompressorbauteil 1 eine Stufenbohrung mit einem großen Durchmesser 3 und einem kleineren Durchmesser 5 dargestellt. In dem durchmesserkleineren Teil 5 der Stufenbohrung ist eine Hülse 7 eingebracht, welche durch Befestigungstechniken wie Einpressen, Einkleben, Einschrauben oder ähnliches in der Stufenbohrung befestigt werden kann. Die Hülse 7 ragt mit einem Teil 9 in den Bereich der Stufenbohrung mit dem größeren Durchmesser 3 und stellt somit mit der Stufenbohrung einen doppelwandigen, zylindrischen Körper in diesem Abschnitt dar.The single FIGURE shows a cross section through a compressor component with the lubricant separator according to the invention. In section, a part of a compressor component 1, for example a section through the cylinder head of a compressor, is shown. On average, a stepped bore with a large diameter 3 and a smaller diameter 5 is shown in this compressor component 1. In the smaller diameter part 5 of the stepped bore a sleeve 7 is introduced, which can be fixed by fastening techniques such as press-fitting, gluing, screwing or the like in the stepped bore. The sleeve 7 protrudes with a part 9 in the region of the stepped bore with the larger diameter 3 and thus represents with the stepped bore a double-walled, cylindrical body in this section.

Tangential mündet in den Wandungsbereich zwischen dem großen Durchmesser 3 der Stufenbohrung und dem Außendurchmesser des Hülsenabschnittes 9 eine Öffnung 11, welche aus dem Auslassdruckbereich innerhalb des Zylinderkopfes des Klimakompressors kommt und damit das unter Hochdruck stehende Kältemittel in diesen Bereich tangential einströmen lässt. Da das durch die Öffnung 11 tangential einströmende Kältemittel auch Schmiermittel zur Schmierung des Kompressors enthält, wird sich um die Hülse im Bereich des Abschnittes 9 herum eine schraubenförmige Schmiermittelbewegung ergeben, wodurch das Schmiermittel durch Fliehkräfte sich außen an der Wandung des großen Stufenbohrungsdurchmessers 3 absetzen kann und nach unten in den Bereich 13 der Stufenbohrung geleitet werden kann. Das Kältemittel selber wird durch die Hülse im Bereich 15 innen in den Bereich 17 einströmen, welcher den Auslassbereich des Kompressors darstellt. Im Auslassbereich 17 des Kompressors ist ein Anschlussbauteil 19 dargestellt, welches eine Leitungsverbindung zwischen der übrigen Klimaanlage und dem hier dargestellten Klimakompressor herstellt. Im unteren Bereich 13 des durchmessergrößeren Bereichs 3 der Stufenbohrung ist im Schnitt ein Ventilkörper 21 dargestellt, welcher ein Regelventil zur Regelung des Triebraumdruckes darstellt. Da dieses Regelventil einen Teil des Kältemittelstroms direkt in den Triebraum leitet und damit auch den Hauptanteil des Schmiermittels, der sich hier in dem erfindungsgemäßen Schmiermittelabscheider abgeschieden hat, wird somit auf kürzestem Weg der Triebraum mit dem entsprechenden Schmiermittel versorgt, während das von dem Schmiermittel weitestgehend befreite Kältemittel in einem Hauptstrom durch den Innenraum 15 der Hülse 7 dem Auslass 17 zur Klimaanlage hin zugeführt wird. Das Regelventil 21 besitzt Dichtungsringe 23 und 25 und dichtet damit in seiner Funktion gleichzeitig die Stufenbohrung des Schmiermittelabscheiders mit ab.Tangency opens into the wall region between the large diameter 3 of the stepped bore and the outer diameter of the sleeve portion 9 an opening 11 which comes from the outlet pressure within the cylinder head of the air compressor and thus allows the high-pressure refrigerant flows tangentially into this area. Since the refrigerant flowing tangentially through the opening 11 also contains lubricant for lubricating the compressor, a helical lubricant movement will result around the sleeve in the region of the section 9, whereby the lubricant by centrifugal forces can settle outside on the wall of the large stepped bore diameter 3 and directed down into the area 13 of the stepped bore can be. The refrigerant itself will flow in through the sleeve in the region 15 inside the region 17, which represents the outlet region of the compressor. In the outlet region 17 of the compressor, a connection component 19 is shown, which produces a line connection between the rest of the air conditioning system and the air conditioning compressor shown here. In the lower region 13 of the larger diameter portion 3 of the stepped bore, a valve body 21 is shown in section, which represents a control valve for controlling the engine room pressure. Since this control valve directs a portion of the refrigerant flow directly into the drive chamber and thus also the main portion of the lubricant which has deposited here in the lubricant according to the invention, the drive chamber is thus supplied by the shortest route with the appropriate lubricant, while the largely freed from the lubricant Refrigerant is supplied in a main flow through the interior 15 of the sleeve 7 to the outlet 17 to the air conditioner. The control valve 21 has sealing rings 23 and 25 and thus seals in its function at the same time from the stepped bore of the lubricant with.

Die hier dargestellte Ausführung des Schmiermittelabscheiders hebt sich von den im Stand der Technik bekannten Schmiermittelabscheidern insbesondere dadurch ab, dass durch eine einzige Stufenbohrung ein sehr kostengünstiges Fertigungsverfahren dargestellt werden kann, wobei dann durch Einsatz eines sehr einfachen Bauteils wie der Hülse 7 die Funktion des Schmiermittelabscheiders einfach, schnell und kostengünstig realisiert werden kann, ohne dass beispielsweise gestufte Drehteile oder ähnliche Bauteile die Funktion des Schmiermittelabscheiders, wie im Stand der Technik dargestellt, übernehmen.The embodiment of the lubricant separator shown here stands out from the lubricant separators known in the prior art in particular in that a very cost-effective production method can be represented by a single stepped bore, whereby the function of the lubricant separator is simple by using a very simple component such as the sleeve 7 , can be realized quickly and inexpensively, without, for example, stepped turned parts or similar components assume the function of the lubricant separator, as shown in the prior art.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Kompressorbauteil (Gehäusebauteil)Compressor component (housing component)
33
großer Durchmesserbig diameter
55
kleiner Durchmessersmall diameter
77
Hülseshell
99
Teil der Hülse, HülsenabschnittPart of the sleeve, sleeve section
1111
Öffnung (Bohrung)Opening (hole)
1313
Bereich der Stufenbohrung (Teil der Stufenbohrung)Area of the stepped bore (part of the stepped bore)
1515
BereichArea
1717
Bereich, Auslassbereich des Kompressors (Auslassanschluss)Range, outlet area of the compressor (outlet port)
1919
Anschlussbauteil (Leitungsverbindung)Connection component (line connection)
2121
Ventilkörper (Regelventil, Ventil)Valve body (control valve, valve)
2323
Dichtungsringsealing ring
2525
Dichtungsringsealing ring

Claims (9)

  1. A compressor, such as an air conditioner compressor for motor vehicles, having a driving mechanism for drawing in and compressing a refrigerant and having a lubricant separator which separates lubricant from the refrigerant in the discharge pressure region of the compressor, the lubricant being fed to the driving mechanism by means of a partial stream that has branched off from the highpressure refrigerant stream, wherein the compressor in the discharge pressure region in a housing component (1) has a stepped hole having a small (5) and a large diameter (3), characterized by a simple sleeve (7) having a single diameter, inserted into the small diameter (5), which sleeve protrudes partially into the part (13) of the stepped hole that has the large diameter (3).
  2. The compressor according to claim 1, characterized in that, tangentially at the outer circumference of the wall of the hole having the large diameter (3), a hole (11) from the immediate outlet pressure region of the cylinder head leads into the stepped hole in the region (13) that is formed by the large diameter (3) and the protruding sleeve (7).
  3. The compressor according to claim 1 or claim 2, characterized in that the stepped hole is drilled as a separate bore into the cylinder head, essentially radially from outside.
  4. The compressor according to claim 1 or claim 2 or claim 3, characterized in that the stepped hole also accommodates a valve (21), which closes the hole and thereby seals it toward the outside.
  5. The compressor according to claim 4, characterized in that the valve (21) is a regulating valve, which regulates the branched partial stream from the discharge pressure region to the drive chamber, and thereby also regulates the drive chamber pressure.
  6. The compressor according to claim 4, characterized in that the valve is a pressurelimiting valve, which limits the pressure into the drive chamber when a maximum permissible pressure is exceeded.
  7. The compressor according to one of the preceding claims, characterized in that the stepped hole leads, with its region of the small diameter (5), into a second hole which constitutes the outlet connection (17) for the discharge pressure region of the refrigerant.
  8. The compressor according to one of the preceding claims, characterized in that the installation of the sleeve (7) in the smaller diameter region (5) of the stepped hole can take place from the valve side, for example by pressing it in.
  9. The compressor according to one of the preceding claims, characterized in that the diameter of the outlet connection for the discharge pressure region of the refrigerant can be kept very small, for example in the range of 5-7 mm.
EP05774251.2A 2004-08-24 2005-08-05 Compressor Not-in-force EP1784573B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004040825 2004-08-24
PCT/DE2005/001387 WO2006021180A1 (en) 2004-08-24 2005-08-05 Compressor

Publications (2)

Publication Number Publication Date
EP1784573A1 EP1784573A1 (en) 2007-05-16
EP1784573B1 true EP1784573B1 (en) 2013-11-20

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Application Number Title Priority Date Filing Date
EP05774251.2A Not-in-force EP1784573B1 (en) 2004-08-24 2005-08-05 Compressor

Country Status (6)

Country Link
US (1) US8353681B2 (en)
EP (1) EP1784573B1 (en)
JP (1) JP4805932B2 (en)
CN (1) CN101006274B (en)
DE (2) DE112005002716A5 (en)
WO (1) WO2006021180A1 (en)

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US9856866B2 (en) 2011-01-28 2018-01-02 Wabtec Holding Corp. Oil-free air compressor for rail vehicles
DE112014005667A5 (en) * 2013-12-13 2016-09-29 Magna Powertrain Bad Homburg GmbH air compressor

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JP4805932B2 (en) 2011-11-02
CN101006274B (en) 2013-05-29
US8353681B2 (en) 2013-01-15
US20080034783A1 (en) 2008-02-14
CN101006274A (en) 2007-07-25
DE112005002716A5 (en) 2007-08-09
JP2008510917A (en) 2008-04-10
EP1784573A1 (en) 2007-05-16
WO2006021180A1 (en) 2006-03-02
DE102005036896A1 (en) 2006-03-02

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