EP1317627B1 - Pump comprising a water supply - Google Patents

Pump comprising a water supply Download PDF

Info

Publication number
EP1317627B1
EP1317627B1 EP01980376A EP01980376A EP1317627B1 EP 1317627 B1 EP1317627 B1 EP 1317627B1 EP 01980376 A EP01980376 A EP 01980376A EP 01980376 A EP01980376 A EP 01980376A EP 1317627 B1 EP1317627 B1 EP 1317627B1
Authority
EP
European Patent Office
Prior art keywords
pump
pump chamber
pressure port
pressure
cooling agent
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.)
Expired - Lifetime
Application number
EP01980376A
Other languages
German (de)
French (fr)
Other versions
EP1317627A1 (en
Inventor
Fritz-Martin Scholz
Reinhard Garczorz
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.)
Rietschle Thomas GmbH and Co KG
Original Assignee
Rietschle Thomas 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 Rietschle Thomas GmbH and Co KG filed Critical Rietschle Thomas GmbH and Co KG
Publication of EP1317627A1 publication Critical patent/EP1317627A1/en
Application granted granted Critical
Publication of EP1317627B1 publication Critical patent/EP1317627B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • F04C29/042—Heating; Cooling; Heat insulation by injecting a fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/19—Temperature

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Nozzles (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Rotary Pumps (AREA)

Abstract

A pump ( 12 ) for generating pressure and/or negative pressure comprises a pump chamber having a high-pressure port ( 16 ) and a low-pressure port ( 14 ), and two at least two-blade rotors which are mounted in the pump chamber on two parallel shafts offset in relation to each other. The rotors roll off onto each other free of contact during rotation while forming cells with an internal compression. Provision is made for a supply of a cooling agent ( 21 ) into the pump chamber, the supply being closed-loop controlled depending on the temperature on the side of the high-pressure port ( 16 ).

Description

Die Erfindung betrifft eine Pumpe zur Erzeugung von Druck und/oder Unterdruck, gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a pump for generating pressure and / or Vacuum, according to the preamble of claim 1.

Solche Pumpen gibt es in verschiedenen Bauarten. Man unterscheidet beispielsweise sogenannte Schraubenverdichter und sogenannte Klauenverdichter.Such pumps are available in different designs. One differentiates for example so-called screw compressors and so-called claw compressors.

Bei den Schraubenverdichtem ist es bekannt, ein Kühlmedium direkt in die Pumpenkammer einzuspeisen. Insbesondere offenbart die US-A-3 795 117 einen Schraubenverdichter, der zur Verdichtung von Kühlmittel dient. Auf der Seite des Niederdruck-Anschlusses wird diesem Schraubenverdichter gasförmiges bzw. dampfförmiges Kühlmittel zugeführt. Das aus dem Schraubenverdichter auf der Seite des Hochdruck-Anschlusses austretende Kühlmittel wird über einen Kondensor und einen daran anschließenden Verdampfer zur Seite des Niederdruck-Anschlusses des Schraubenverdichters zurückgeführt. Zur Kühlung des Schraubenverdichters ist vorgesehen, daß geringe Mengen des von dem Kondensor abströmenden flüssigen Kühlmittels direkt in die Arbeitskammer des Schraubenverdichters eingespeist werden. Die einzuspeisende Menge wird mittels eines Expansionsventils in Abhängigkeit der Temperatur auf der Seite des Hochdruck-Anschlusses gesteuert.In the case of screw compressors, it is known to place a cooling medium directly in the Feed the pump chamber. In particular, US-A-3 795 117 discloses one Screw compressor used to compress coolant. On the side of the Low pressure connection, this screw compressor becomes gaseous or vapor coolant supplied. That from the screw compressor on the The coolant escaping from the high-pressure connection is fed through a Condenser and an adjoining evaporator to the side of the Low pressure connection of the screw compressor returned. For cooling of the screw compressor is provided that small amounts of the Liquid coolant flowing out condenser directly into the working chamber of the Screw compressor can be fed. The amount to be fed is determined by an expansion valve depending on the temperature on the side of the High pressure connection controlled.

Bei den bekannten Klauenverdichtem wird dagegen die anfallende Verdichtungswärme durch einen Kühlluftstrom an der mit Kühlrippen versehenen Außenfläche des Gehäuses oder durch einen im Gehäuse integrierten Kühlwasserkreislauf abgeführt.In the known claw compressors, on the other hand, the resultant Heat of compression through a cooling air flow at the with cooling fins provided outer surface of the housing or by one in the housing integrated cooling water circuit.

Durch die Erfindung wird eine Pumpe der oben angegebenen Art geschaffen, die außerdem die Merkmale des Kennzeichens des Anspruchs 1 aufweist. Durch die temperaturabhängige Regelung des eingespeisten Kühlmedium-Volumenstroms wird eine Überhitzung der Pumpe unter harten Einsatzbedingungen zuverlässig vermieden. Daher ist die erfindungsgemäße Pumpe insbesondere zur Verwendung in Verbindung mit Brennstoffzellen bei Kraftfahrzeugen geeignet. Weitere wesentliche Vorteile gegenüber bekannten Klauenverdichtern sind:

  • kompakte Bauweise duch verminderten Bedarf an externer Kühlung;
  • geringe Temperaturdifferenzen im Betrieb, da die Verdichtungswärme direkt am Ort ihrer Entstehung abgebaut wird;
  • kleinere Spalte zwischen Rotoren und Gehäuse, dadurch verbesserter Wirkungsgrad;
  • Befeuchtung der verdichteten Luft, wie bei bestimmten Prozessen vorteilhaft.
The invention provides a pump of the type specified above, which also has the features of the characterizing part of claim 1. The temperature-dependent control of the cooling medium volume flow fed in reliably prevents the pump from overheating under harsh operating conditions. The pump according to the invention is therefore particularly suitable for use in connection with fuel cells in motor vehicles. Other significant advantages over known claw compressors are:
  • compact design due to reduced need for external cooling;
  • low temperature differences during operation, since the heat of compression is dissipated directly at the point where it is generated;
  • smaller gaps between rotors and housing, resulting in improved efficiency;
  • Humidification of the compressed air, which is advantageous in certain processes.

Als Kühlmedium ist Wasser besonders geeignet.Water is particularly suitable as the cooling medium.

Bei der bevorzugten Ausführungsform der Erfindung ist eine Zweistoff-Zerstäuberdüse, vorgesehen der außer dem flüssigen Kühlmedium ein gasförmiger Volumenstrom zugeführt wird, der vom Hochdruck-Anschluß abgezweigt ist. Die Zweistoff-Zerstäuberdüse ist mit einem Durchfluss-Regulierelement versehen, an dem ein Stellantrieb angreift.In the preferred embodiment of the invention a two-substance atomizer nozzle, provided the besides that A gaseous volume flow is supplied to the liquid cooling medium is branched off from the high pressure connection. The two-component atomizer nozzle is provided with a flow regulating element on which an actuator attacks.

Einzelheiten der Erfindung sind den beigefügten Zeichnungen entnehmbar. In den Zeichnungen zeigen:

  • Fig. 1 ein Prinzipschema der erfindungsgemäßen Pumpe mit temperaturgeregelter Wassereinspeisung direkt in den Verdichterraum unter Verwendung einer regulierbaren Zweistoff-Zerstäuberdüse;
  • Fig. 2 eine schematische Schnittansicht eines Klauenverdichters mit temperaturgeregelter Wassereinspeisung nach dem Prinzipschema von Fig. 1;
  • Fig. 3 eine Variante des Klauenverdichters nach Fig. 2, bei dem der auslaßseitige Systemdruck zur Verdüsung des eingespeisten Kühlwassers ausgenutzt wird; und
    • Details of the invention can be found in the accompanying drawings. The drawings show:
  • Figure 1 is a schematic diagram of the pump according to the invention with temperature-controlled water feed directly into the compressor chamber using an adjustable two-component atomizer nozzle.
  • FIG. 2 shows a schematic sectional view of a claw compressor with temperature-controlled water feed according to the basic scheme of FIG. 1;
  • 3 shows a variant of the claw compressor according to FIG. 2, in which the outlet-side system pressure is used to atomize the cooling water fed in; and

    • In dem in Figur 1 dargestellten Prinzipschema ist eine durch einen Elektromotor M betriebene Pumpe 12 gezeigt, die eingangsseitig mit einer Saugleitung 14 und ausgangsseitig mit einer Druckleitung 16 verbunden ist. Über die Saugleitung 14 kann ein gasförmiges Medium mit Druck P0 und Temperatur T0 der Pumpe 12 zugeführt und über die Druckleitung 16 ein gasförmiges Medium mit Druck P2 und Temperatur T2 von der Pumpe abgeführt werden. In die Saugleitung 14 mündet eine Zweistoff-Zerstäuberdüse 18, der über einen Kühlmittelzulauf 20 Kühlwasser 21 und über einen Druckluftanschluß 22 Druckluft zugeführt werden kann. Die Zweistoff-Zerstäuberdüse 18 ist mit einem Durchfluß-Regulierelement versehen, das über einen angreifenden Stellantrieb 24 betätigt werden kann. Die einzuspeisende Kühlwassermenge wird über einen Regelkreis bestimmt. Zur Regelung ist in der Druckleitung 16 ein Temperatursensor vorgesehen, der die Temperatur T2 des aus der Pumpe 12 austretenden gasförmigen Mediums mißt. Die gemessene Temperatur T2 wird mit einen Sollwert Ts verglichen, und die Temperaturdifferenz T2-Ts wird über Durchfluß des flüssigen Kühlmittels durch Ansteuerung des Stellantriebs 24 ausgeregelt.1 shows a pump 12 operated by an electric motor M, which is connected on the inlet side to a suction line 14 and on the outlet side to a pressure line 16. A gaseous medium with pressure P 0 and temperature T 0 can be fed to the pump 12 via the suction line 14 and a gaseous medium with pressure P 2 and temperature T 2 can be discharged from the pump via the pressure line 16. A two-substance atomizer nozzle 18 opens into the suction line 14 and can be supplied with cooling water 21 via a coolant inlet 20 and compressed air via a compressed air connection 22. The two-component atomizer nozzle 18 is provided with a flow regulating element which can be actuated via an actuating actuator 24. The amount of cooling water to be fed is determined via a control loop. To regulate, a temperature sensor is provided in the pressure line 16, which measures the temperature T 2 of the gaseous medium emerging from the pump 12. The measured temperature T 2 is compared with a target value T s , and the temperature difference T 2 -T s is corrected via the flow of the liquid coolant by actuating the actuator 24.

    In Figur 2 ist die erfindungsgemäße Pumpe von Figur 1 in einer schematischen Schnittansicht gezeigt. Die Pumpe 12 weist ein Gehäuse 30 auf, in der eine Pumpenkammer 32 gebildet ist. In der Pumpenkammer 32 sind zwei zweiflügelige Rotoren 34, 36 jeweils auf einer Welle 38, 40 gelagert. Die Wellen 38, 40 sind parallel und gegeneinander versetzt angeordnet. Die Rotoren 34, 36 wälzen bei einer Drehung berührungslos aufeinander ab und bilden dabei Zellen 42 variabler Größe, wobei eine innere Verdichtung stattfindet. Die im Betrieb dieses sogenannten Klauen-Verdichters 12 anfallende Wärme wird im wesentlichen durch die in Figur 1 beschriebene temeraturgeregelte Wassereinspeisung abgeführt. Die zur Kühlung benötigte Wassermenge wird über die Zweistoff-Zerstäuberdüse 18 direkt in die Pumpenkammer 32 verdüst.In Figure 2, the pump of Figure 1 according to the invention is in one schematic sectional view shown. The pump 12 has a housing 30 in which a pump chamber 32 is formed. In the pump chamber 32 are two double-bladed rotors 34, 36 each on a shaft 38, 40 stored. The shafts 38, 40 are parallel and offset from one another arranged. The rotors 34, 36 roll without contact during a rotation each other and thereby form cells 42 of variable size, one inner compression takes place. The in operation of this so-called Claw compressor 12 heat is essentially by the discharged temperature-controlled water feed described in Figure 1. The amount of water required for cooling is via the two-component atomizer nozzle 18 sprayed directly into the pump chamber 32.

    Der in Figur 3 abgebildete Klauen-Verdichter 112 entspricht dem in Figur 2 abgebildeten Klauen-Verdichter 12. Im Unterschied zu dem in Figur 2 abgebildeten Kühlregelkreis wird hier der der Zweistoff-Zerstäuberdüse 118 zugeführte gasförmige Volumenstrom von der Druckleitung 116 abgezweigt und über eine Leitung 144 zur Zweistoff-Zerstäuberdüse 118 zurückgeführt. Der auslaßseitige Systemdruck wird so zur Verdüsung des eingespeisten Kühlwassers 121 ausgenutzt. The claw compressor 112 shown in FIG. 3 corresponds to that in FIG Figure 2 shown claw compressor 12. In contrast to that in Figure 2 cooling control circuit shown here is that of the two-component atomizer nozzle 118 gaseous volume flow supplied by the Pressure line 116 branched off and via a line 144 to the two-component atomizer nozzle 118 returned. The system pressure on the outlet side becomes like this exploited to atomize the fed cooling water 121.

    Gemäß einer weiteren erfindungsgemäßen Ausführungsform ist vorgesehen, daß das flüssige Kühlmedium von der steuerbaren Einspritzpumpe nicht direkt in die Pumpenkammer eingespeist wird, sondern über eine zwischen Pumpenkammer und Einspritzpumpe geschaltete Einspritzdüse eingespeist wird.According to a further embodiment according to the invention provided that the liquid cooling medium from the controllable Injection pump is not fed directly into the pump chamber, but via a switch between the pump chamber and the injection pump Injector is fed.

    Erfindungsgemäß ist ferner vorgesehen, daß die Einspritzdüse im Bereich der Druckleitung in die Pumpenkammer mündet bzw. daß eine zu der Einspritzdüse im Bereich der Saugleitung zusätzliche Einspritzdüse im Bereich der Druckleitung in die Pumpenkammer mündet.According to the invention it is further provided that the injection nozzle in Area of the pressure line opens into the pump chamber or that one too additional injection nozzle in the area of the suction line opens into the pump chamber in the area of the pressure line.

    Durch die temperaturgeregelte Einspeisung des Kühlwassers direkt in die Pumpenkammer wird eine Überhitzung der Pumpe auch unter harten Einsatzbedingungen zuverlässig vermieden. Die erfindungsgemäße Pumpe hat im Vergleich zu aus dem Stand der Technik bekannten Pumpen mit externer Kühlung den Vorteil, daß sie durch ihre kompakte Bauweise einen verminderten Platzbedarf aufweist. Da die Verdichtungswärme direkt am Ort ihrer Entstehung, nämlich in der Pumpenkammer abgebaut wird, treten im Vergleich zur Pumpe mit externer Kühlung nur kleine Temperaturdifferenzen zwischen Gehäuse und Rotoren auf. Dadurch ist die im Betrieb auftretende Temperaturdehnung der Rotoren minimal, so daß die Pumpe mit sehr kleinen Spalten zwischen Rotor und Gehäuse ausgelegt werden kann. Durch die Spaltreduzierung werden Rückströmungen minimiert und der Wirkungsgrad optimiert.Due to the temperature-controlled feeding of the cooling water directly into The pump chamber will overheat the pump even under hard conditions Conditions of use reliably avoided. The pump according to the invention has in comparison to pumps known from the prior art external cooling has the advantage that its compact design has a reduced space requirement. Because the heat of compression directly at the place of their creation, namely dismantled in the pump chamber compared to the pump with external cooling, only small Temperature differences between the housing and rotors. This is the thermal expansion of the rotors occurring during operation is minimal, so that the pump is designed with very small gaps between the rotor and housing can be. Backflows are minimized by reducing the gap and optimized the efficiency.

    Claims (6)

    1. A pump (12; 112) for generating pressure and/or negative pressure, comprising a pump chamber (32; 132) having a high-pressure port (16; 116) and a low-pressure port (14; 114), with a supply of a cooling agent (21; 121) into the pump chamber (32; 132) being provided, the supply being closed-loop controlled by the temperature on the side of the high-pressure port (16; 116), characterized in that at least one injection nozzle (18; 118) for the cooling agent in the form of a two-component atomizer nozzle is arranged to open into the pump chamber (32; 132) and the pump further comprises two at least two-blade rotors (34, 36; 134, 136) which are mounted in the pump chamber (32; 132) on two parallel shafts (38, 40; 138, 140) offset in relation to each other, the rotors rolling off onto each other free of contact during rotation while forming cells (42; 142) with an internal compression.
    2. The pump as claimed in claim 1, characterized in that the cooling agent (21; 121) is water.
    3. The pump as claimed in claim 1 or 2, characterized in that at least one injection nozzle (18; 118) opens into the pump chamber (32; 132) in the area of the low-pressure port (14; 114).
    4. The pump as claimed in any of claims 1 to 3, characterized in that at least one injection nozzle (18; 118) opens into the pump chamber (32; 132) in the area of the high-pressure port (16; 116).
    5. The pump as claimed in any of the preceding claims, characterized in that in addition to the liquid cooling agent (121) a gaseous volume flow which is branched off from the high-pressure port (116) is supplied to the two-component atomizer nozzle (118).
    6. The pump as claimed in any of the preceding claims, characterized in that the two-component atomizer nozzle (18) is provided with a flow regulating member which is engaged by an actuating drive (24).
    EP01980376A 2000-09-12 2001-09-12 Pump comprising a water supply Expired - Lifetime EP1317627B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    DE20015744U 2000-09-12
    DE20015744U DE20015744U1 (en) 2000-09-12 2000-09-12 Pump with water feed
    PCT/EP2001/010536 WO2002023046A1 (en) 2000-09-12 2001-09-12 Pump comprising a water supply

    Publications (2)

    Publication Number Publication Date
    EP1317627A1 EP1317627A1 (en) 2003-06-11
    EP1317627B1 true EP1317627B1 (en) 2004-10-06

    Family

    ID=7946355

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP01980376A Expired - Lifetime EP1317627B1 (en) 2000-09-12 2001-09-12 Pump comprising a water supply

    Country Status (9)

    Country Link
    US (1) US7077635B2 (en)
    EP (1) EP1317627B1 (en)
    JP (1) JP2004509271A (en)
    KR (1) KR20030032018A (en)
    CN (1) CN1252389C (en)
    AT (1) ATE278875T1 (en)
    CA (1) CA2421988A1 (en)
    DE (2) DE20015744U1 (en)
    WO (1) WO2002023046A1 (en)

    Families Citing this family (10)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    SE0202111D0 (en) * 2002-07-05 2002-07-05 Delaval Holding Ab An arrangement and a method for the treatment of a vacuum pump
    DE10258363A1 (en) * 2002-12-12 2004-06-24 Daimlerchrysler Ag Device for supplying air to fuel cells has claw compressor with at least two mutually engaged compressor wheels, claw expansion device with at least two mutually engaged expansion device wheels
    US7375719B2 (en) 2003-12-29 2008-05-20 Lg. Philips Lcd. Co., Ltd Method and apparatus for driving liquid crystal display
    DE102008030788A1 (en) * 2008-06-28 2009-12-31 Oerlikon Leybold Vacuum Gmbh Method for cleaning vacuum pumps
    DE102009017887A1 (en) * 2009-04-17 2010-10-21 Oerlikon Leybold Vacuum Gmbh Coarse pumping process for a positive displacement pump
    DE102009043133B4 (en) * 2009-09-23 2012-08-09 Roth & Rau Ag Device and method for cleaning a pump chamber of a vacuum pump
    JP5765862B2 (en) * 2013-08-30 2015-08-19 株式会社アンレット Low pressure steam recycling equipment
    CN104632630B (en) * 2013-11-13 2017-01-11 中国科学院沈阳科学仪器股份有限公司 System and method for controlling thermal expansion of Roots dry pump
    CN105443391A (en) * 2015-12-26 2016-03-30 广州市心德实业有限公司 Anti-corrosion device for alleviating corrosion of Roots compressor
    GB2557681A (en) * 2016-12-15 2018-06-27 Edwards Ltd A claw pump and method of operation

    Family Cites Families (13)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US2906448A (en) * 1954-10-28 1959-09-29 W C Heraus G M B H Roots type vacuum pumps
    GB1172993A (en) 1966-02-23 1969-12-03 Plessey Co Ltd Improvements in or relating to Rotary-Positive Displacement Machines
    US3759348A (en) * 1971-11-08 1973-09-18 Maekawa Seisakusho Kk Method of compressing chlorine gas
    US3795117A (en) * 1972-09-01 1974-03-05 Dunham Bush Inc Injection cooling of screw compressors
    FR2401338B1 (en) * 1977-06-17 1980-03-14 Cit Alcatel
    DE3427117A1 (en) * 1984-07-23 1986-02-20 Aerzener Maschinenfabrik Gmbh, 3251 Aerzen METHOD FOR COOLING A SCREW COMPRESSOR AND SCREW COMPRESSOR FOR CARRYING OUT THE METHOD
    JPS6368793A (en) * 1986-09-10 1988-03-28 Mazda Motor Corp Supercharger for engine
    US4861246A (en) * 1988-01-07 1989-08-29 Bernard Zimmern Injected compressor with liquid switch
    DE59402988D1 (en) * 1993-08-11 1997-07-10 Siemens Ag Mechanical compressor system
    DE4447097A1 (en) * 1994-12-29 1996-07-04 Guenter Kirsten Compressor system
    DE19806346C2 (en) 1998-02-12 2000-05-18 Gardner Denver Wittig Gmbh Device for cooling and shaft sealing of a compressor
    JP2000291579A (en) * 1998-10-16 2000-10-17 Toyota Autom Loom Works Ltd Water-cooled type gas feeding device
    DE10153459B9 (en) * 2001-10-30 2004-09-09 Kaeser Kompressoren Gmbh Arrangement for controlling the flow of cooling fluid in compressors

    Also Published As

    Publication number Publication date
    ATE278875T1 (en) 2004-10-15
    EP1317627A1 (en) 2003-06-11
    CN1455849A (en) 2003-11-12
    CN1252389C (en) 2006-04-19
    DE50104032D1 (en) 2004-11-11
    JP2004509271A (en) 2004-03-25
    KR20030032018A (en) 2003-04-23
    US20040037727A1 (en) 2004-02-26
    DE20015744U1 (en) 2001-01-25
    WO2002023046A1 (en) 2002-03-21
    CA2421988A1 (en) 2003-03-11
    US7077635B2 (en) 2006-07-18

    Similar Documents

    Publication Publication Date Title
    EP1317627B1 (en) Pump comprising a water supply
    DE102008012780B4 (en) exhaust treatment device
    DE3123736C2 (en)
    DE60123321T2 (en) Compressor system with a controlled cooling fan
    DE10333535B4 (en) Ejector circuit with one compressor
    EP1886075A1 (en) Refrigeration plant
    EP2114679B1 (en) Cooling device for printing machines
    EP3699515A1 (en) Temperature-controlled chamber and method
    EP2071186A2 (en) Vacuum pump and its operating method
    DE3903340A1 (en) CONTROL CIRCUIT FOR A SOLENOID VALVE OF A COMPRESSOR WITH VARIABLE DELIVERY PERFORMANCE
    DE102007023858B4 (en) Coolant pump for a cooling circuit of an internal combustion engine
    DE102004040791B4 (en) Ejektorpumpendekompressionsvorrichtung
    EP0593495B1 (en) Cooling device
    DE60013357T2 (en) scroll compressor
    WO2019092024A1 (en) Scroll compressor with an optimized closing pressure
    EP3388677A1 (en) Method for controlling a screw compressor
    DE102004014469A1 (en) Control valve device for an adjustable swash plate compressor
    DE102013112670A1 (en) Cooling circuit
    EP1510676B1 (en) Gas turbine plant
    EP3667086B1 (en) Spiral-type displacement machine, in particular a displacement machine for a vehicle air-conditioning system
    DE3822781C2 (en)
    DE3834278C2 (en)
    EP0172430A1 (en) Cooling method for a screw compressor, and a screw compressor for carrying out this method
    DE10101975A1 (en) Motor-driven compressor that is cooled by cooling gas
    DE102021003045A1 (en) Cooling device for cooling charge air for an internal combustion engine

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    17P Request for examination filed

    Effective date: 20030402

    AK Designated contracting states

    Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

    17Q First examination report despatched

    Effective date: 20030718

    GRAP Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOSNIGR1

    GRAS Grant fee paid

    Free format text: ORIGINAL CODE: EPIDOSNIGR3

    RAP1 Party data changed (applicant data changed or rights of an application transferred)

    Owner name: RIETSCHLE THOMAS GMBH + CO. KG

    GRAA (expected) grant

    Free format text: ORIGINAL CODE: 0009210

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: NL

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20041006

    Ref country code: IE

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20041006

    Ref country code: FI

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20041006

    Ref country code: ES

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20041006

    Ref country code: TR

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20041006

    REG Reference to a national code

    Ref country code: GB

    Ref legal event code: FG4D

    Free format text: NOT ENGLISH

    REG Reference to a national code

    Ref country code: CH

    Ref legal event code: NV

    Representative=s name: TROESCH SCHEIDEGGER WERNER AG

    Ref country code: CH

    Ref legal event code: EP

    REG Reference to a national code

    Ref country code: IE

    Ref legal event code: FG4D

    Free format text: GERMAN

    REF Corresponds to:

    Ref document number: 50104032

    Country of ref document: DE

    Date of ref document: 20041111

    Kind code of ref document: P

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: SE

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20050106

    Ref country code: DK

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20050106

    Ref country code: GR

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20050106

    GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

    Effective date: 20050106

    NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
    REG Reference to a national code

    Ref country code: IE

    Ref legal event code: FD4D

    ET Fr: translation filed
    PLBE No opposition filed within time limit

    Free format text: ORIGINAL CODE: 0009261

    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: AT

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20050912

    Ref country code: CY

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20050912

    26N No opposition filed

    Effective date: 20050707

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: BE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20050930

    Ref country code: LU

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20050930

    Ref country code: MC

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20050930

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: CH

    Payment date: 20070924

    Year of fee payment: 7

    BERE Be: lapsed

    Owner name: *RIETSCHLE THOMAS G.M.B.H. + CO. K.G.

    Effective date: 20050930

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: PT

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20050306

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: GB

    Payment date: 20070926

    Year of fee payment: 7

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: DE

    Payment date: 20071120

    Year of fee payment: 7

    Ref country code: IT

    Payment date: 20070925

    Year of fee payment: 7

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: FR

    Payment date: 20070917

    Year of fee payment: 7

    REG Reference to a national code

    Ref country code: CH

    Ref legal event code: PL

    GBPC Gb: european patent ceased through non-payment of renewal fee

    Effective date: 20080912

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: ST

    Effective date: 20090529

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: IT

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20080912

    Ref country code: DE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20090401

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: LI

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20080930

    Ref country code: FR

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20080930

    Ref country code: CH

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20080930

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: GB

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20080912