EP1196247B1 - Laborzentrifuge mit kuehlaggregat - Google Patents
Laborzentrifuge mit kuehlaggregat Download PDFInfo
- Publication number
- EP1196247B1 EP1196247B1 EP00942132A EP00942132A EP1196247B1 EP 1196247 B1 EP1196247 B1 EP 1196247B1 EP 00942132 A EP00942132 A EP 00942132A EP 00942132 A EP00942132 A EP 00942132A EP 1196247 B1 EP1196247 B1 EP 1196247B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- centrifuge
- motor
- cooling
- frequency
- inverter
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B15/00—Other accessories for centrifuges
- B04B15/02—Other accessories for centrifuges for cooling, heating, or heat insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
- B04B9/10—Control of the drive; Speed regulating
Definitions
- the invention relates to a laboratory centrifuge with electric centrifuge motor.
- the centrifuge motor as an induction motor with frequency-controlled Supply via a frequency converter form. This can be the for the centrifuge operation required accuracy of the setting of the rotor speed to reach.
- Laboratory centrifuges are also powered by an electric motor cooling unit known.
- the cooling motors in a simple design with constant speed continuously provided, wherein the control of the cooling power via switching on and off of the engine takes place.
- air conditioners it is known from DE 3523818 C3, the motor frequency controlled to operate.
- Controlled temperature laboratory centrifuges are disclosed in EP-A-0 833 138 and GB-A-2 150 717.
- the object of the present invention is to provide a laboratory centrifuge with Speed-controlled centrifuge motor and cooling unit structurally easier and cheaper to train.
- the features of claim 5 are provided. In this way is ensured that the cooling engine below a minimum speed only runs at short notice. This is advantageous when using conventional refrigeration units with a compressor, the lubrication reasons only above a minimum Speed may be operated.
- the invention is for example and schematically with the strong schematisienten block diagram of a centrifuge shown.
- the centrifuge has a rotor 2, which is not shown in the usual way has internal recordings for the usual Zentrifugiergefäße.
- a centrifugal motor 5 which as Three-phase induction motor is formed.
- the centrifugal motor 5 is connected via three lines 6 from a centrifuge inverter 7 of a frequency converter 20 supplies.
- the frequency converter 20 is the centrifugal inverter 7 with input lines to the positive line and the minus line of a DC voltage source 10 is connected.
- the DC voltage source 10 points between the positive line and the negative line a conventional charging capacitor 11 and is powered by a mains rectifier 12 fed, which is connected via lines to mains AC voltage is.
- a cooling unit 17 is provided, which in the highly schematic representation with a cooler designed as a tube cooler 18 18 the rotor. 2 cools, and with a likewise formed as a snake cooler heat exchanger 19 dissipates the heat outside the housing, not shown.
- the cooling circuit is supplied by a compressor, not shown, which has a Shaft 21 is driven by an electric cooling motor 22.
- the cooling motor 22 is also designed as an induction motor and is about three lines 23 supplied by a cooling inverter 24. This is in the frequency converter 20 via input lines to the plus line and the minus line the DC voltage source 10, that is parallel to the centrifuge inverter 7 connected. It is controlled by a frequency control 28 in similar manner as the centrifugal inverter 7 driven.
- the cooling capacity of the cooling unit can be 17 and the speed of the rotor 2 completely separated by appropriate specifications to adjust.
- the purpose of a control device 30, which via corresponding data lines is connected to the frequency controls 15 and 28 to these the specify the speeds to be set.
- the control device 30 can in particular at full load of the centrifuge motor. 5 during startup of the rotor 2, the power to the cooling motor 22 through Reduce the drive frequency reduction or switch it off completely. Thus, an overload of the DC voltage source 10 is avoided and this can, e.g. with regard to the charging capacitor 11 and the mains rectifier 2, as well as in terms of size and manufacturing costs can be reduced.
- the control device 30 may be designed so that when switching on the centrifuge First, the cooling unit 17 is turned off and the rotor 2 rotates high into the range of its predetermined setpoint speed. Then the power consumption drops of the centrifuge motor 5 and it can now be the power to the cooling motor 22 are raised, the not shown, to the control device 30 connected temperature sensors - after reaching the desired Temperature - which can reduce power again.
- Control device 30 is designed such that it is used to brake the centrifuge the frequency of the centrifuge inverter 7 shuts down. This one delivers now a braking current back into the DC voltage source 10. In heavy braking can the DC voltage source 10 are overloaded with voltage increase.
- the Control device 30 ensures that when braking the centrifuge motor 5 of the Cooling inverter 24 is driven with a defined frequency, so that the Cooling motor 22 draws current from the DC voltage source 10. The cooling motor 22 then acts as a braking resistor, so that additional braking resistors saved can be.
- the control device 30 is additionally designed so that it is the cooling inverter 24 only above a minimum frequency, corresponding to a minimum speed the cooling motor 22, operates.
- a provided in the cooling unit 17, unillustrated refrigerant compressor is in this way only above a minimum speed operated, so that occurring at lower speeds lubrication problems be avoided.
Landscapes
- Centrifugal Separators (AREA)
Description
Claims (5)
- Laborzentrifuge mit einem von einem elektrischen Zentrifugenmotor (5) angetriebenen Rotor (2) und einem von einem elektrischen Kühlmotor (22) angetriebenen Kühlaggregat (17), wobei der Zentrifugenmotor (5) als frequenzgesteuerter Induktionsmotor ausgebildet ist und von einem von einer Steuerungseinrichtung (30) gesteuerten Frequenzumrichter (20) versorgt ist, der einen den Zentrifugenmotor (5) speisenden Zentrifugenwechselrichter (7) aufweist, welcher an eine von einem Netzgleichrichter (12) versorgte Gleichspannungsquelle (10) angeschlossen ist, dadurch gekennzeichnet, daß der Kühlmotor (22) als frequenzgesteuerter Induktionsmotor ausgebildet ist und daß der Frequenzumrichter (20) einen weiteren, parallel zum Zentrifugenwechselrichter (7) an die Gleichspannungsquelle (10) angeschlossenen Kühlwechselrichter (24) aufweist, der den Kühlmotor (22) speist.
- Laborzentrifuge nach Anspruch 1, dadurch gekennzeichnet, daß die Steuereinrichtung (30) die beiden Wechselrichter (7, 24) unabhängig steuert.
- Laborzentrifuge nach Anspruch 2, dadurch gekennzeichnet, daß die Steuerungseinrichtung (30) bei starker Verlangsamung der Frequenz des Zentrifugenwechselrichters (7) den Kühlwechselrichter (24) mit definierter Frequenz ansteuert.
- Laborzentrifuge nach Anspruch 2, dadurch gekennzeichnet, daß die Steuereinrichtung (30) bei Beschleunigung des Zentrifugenmotors (5) die Frequenz des Kühlwechselrichters (24) verringert.
- Laborzentrifuge nach Anspruch 2, dadurch gekennzeichnet, daß die Steuereinrichtung (30) den Kühlwechselrichter (24) unterhalb einer Minimalfrequenz abschaltet.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19932721A DE19932721C1 (de) | 1999-07-16 | 1999-07-16 | Laborzentrifuge mit Kühlaggregat |
DE19932721 | 1999-07-16 | ||
PCT/EP2000/005877 WO2001005516A1 (de) | 1999-07-16 | 2000-06-26 | Laborzentrifuge mit kühlaggregat |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1196247A1 EP1196247A1 (de) | 2002-04-17 |
EP1196247B1 true EP1196247B1 (de) | 2003-04-23 |
Family
ID=7914623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00942132A Expired - Lifetime EP1196247B1 (de) | 1999-07-16 | 2000-06-26 | Laborzentrifuge mit kuehlaggregat |
Country Status (5)
Country | Link |
---|---|
US (1) | US6866621B1 (de) |
EP (1) | EP1196247B1 (de) |
JP (1) | JP4365062B2 (de) |
DE (2) | DE19932721C1 (de) |
WO (1) | WO2001005516A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2335830A1 (de) * | 2009-12-17 | 2011-06-22 | Eppendorf Ag | Laborzentrifuge mit Kompressorkühlung |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19932721C1 (de) * | 1999-07-16 | 2001-01-18 | Eppendorf Geraetebau Netheler | Laborzentrifuge mit Kühlaggregat |
FI118661B (fi) | 2002-10-17 | 2008-01-31 | Vacon Oyj | Jäähdytysjärjestely taajuusmuuttajassa |
DE102006027696B4 (de) * | 2006-06-14 | 2009-07-02 | Thermo Electron Led Gmbh | Verfahren und Vorrichtung zum Positionieren eines Rotors einer Zentrifuge |
US7555933B2 (en) * | 2006-08-01 | 2009-07-07 | Thermo Fisher Scientific Inc. | Method and software for detecting vacuum concentrator ends-of-runs |
JP4569778B2 (ja) * | 2006-09-01 | 2010-10-27 | 日立工機株式会社 | 遠心機 |
JP5541118B2 (ja) * | 2010-11-26 | 2014-07-09 | 日立工機株式会社 | 遠心分離機 |
US9246432B2 (en) * | 2011-02-14 | 2016-01-26 | Beckman Coulter, Inc. | Regenerative braking safety system and method of use |
JP5861988B2 (ja) | 2011-04-15 | 2016-02-16 | 日立工機株式会社 | 遠心分離機 |
JP5948971B2 (ja) * | 2011-04-15 | 2016-07-06 | 日立工機株式会社 | 遠心分離機 |
JP5854218B2 (ja) * | 2012-01-24 | 2016-02-09 | 日立工機株式会社 | 遠心分離機 |
DE102012002593A1 (de) | 2012-02-13 | 2013-08-14 | Eppendorf Ag | Zentrifuge mit Kompressorkühleinrichtung und Verfahren zur Steuerung einer Kompressorkühleinrichtung einer Zentrifuge |
DE202012001679U1 (de) * | 2012-02-20 | 2012-04-04 | Sigma Laborzentrifugen Gmbh | Anlaufgerät für den Kompressor einer Kühlzentrifuge |
CN103623942B (zh) * | 2012-08-26 | 2015-09-16 | 上海市离心机械研究所有限公司 | 卧螺离心机的温度控制方法 |
JP6056383B2 (ja) * | 2012-10-31 | 2017-01-11 | 日立工機株式会社 | 遠心機 |
DE102014107294B4 (de) * | 2014-05-23 | 2017-02-09 | Andreas Hettich Gmbh & Co. Kg | Zentrifuge |
DE102014110467A1 (de) * | 2014-07-24 | 2016-01-28 | Andreas Hettich Gmbh & Co. Kg | Zentrifuge |
JP6910855B2 (ja) * | 2017-06-05 | 2021-07-28 | 荏原冷熱システム株式会社 | ターボ冷凍機 |
DE102017130785A1 (de) * | 2017-12-20 | 2019-06-27 | Eppendorf Ag | Temperierte Zentrifuge |
CN111530644A (zh) * | 2020-04-22 | 2020-08-14 | 珠海华硕医疗器械有限公司 | 用于医用离心机的风冷控温结构 |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3246688A (en) * | 1962-06-28 | 1966-04-19 | Beckman Instruments Inc | Controlled temperature apparatus |
GB1007479A (en) * | 1963-01-15 | 1965-10-13 | Mse Holdings Ltd | Improvements in or relating to centrifuges |
US3409212A (en) * | 1966-07-14 | 1968-11-05 | Beckman Instrumetns Inc | Apparatus for controllling centrifuge rotor temperature |
DE2824045C2 (de) * | 1978-06-01 | 1983-03-24 | Heraeus-Christ Gmbh, 3360 Osterode | Schaltungsanordnung zum Bremsen einer Laborzentrifuge |
DE3343516C2 (de) * | 1983-12-01 | 1985-10-31 | Berthold Hermle Kg, 7209 Gosheim | Kühlzentrifuge mit auswechselbaren Rotoren |
JPH0683590B2 (ja) | 1984-07-04 | 1994-10-19 | 株式会社東芝 | 空気調和機 |
DD243650A1 (de) * | 1985-12-02 | 1987-03-11 | Medizin Labortechnik Veb K | Verfahren zur temperierung der rotoren von ultrazentrifugen |
DD248968A1 (de) | 1986-05-14 | 1987-08-26 | Kyffhaeuserhuette Maschf | Leistungselektronischer antrieb fuer zentrifugalseparatoren |
DE4136514C2 (de) * | 1991-11-06 | 1994-08-18 | Heraeus Sepatech | Schaltungsanordnung zur Drehzahlsteuerung eines als Zentrifugenantrieb dienenden dreiphasigen Induktionsmotors |
JP3687797B2 (ja) * | 1994-03-09 | 2005-08-24 | 日立工機株式会社 | 遠心機用モータの制御装置 |
US5509881A (en) * | 1994-07-07 | 1996-04-23 | Beckman Instruments, Inc. | Centrifuge rotor identification and refrigeration control system based on windage |
US5431620A (en) * | 1994-07-07 | 1995-07-11 | Beckman Instruments, Inc. | Method and system for adjusting centrifuge operation parameters based upon windage |
JP3509310B2 (ja) * | 1995-07-07 | 2004-03-22 | 日立工機株式会社 | 遠心機の予冷運転制御方法 |
FR2754055B1 (fr) | 1996-09-27 | 1998-12-18 | Jouan | Dispositif de determination du couple resistant d'un equipement en rotation, systeme de surveillance d'un moteur electrique et systeme de regulation de parametres d'un centrifugeur associe |
JP3863285B2 (ja) * | 1998-04-10 | 2006-12-27 | 株式会社久保田製作所 | 冷却遠心分離機 |
DE19932721C1 (de) * | 1999-07-16 | 2001-01-18 | Eppendorf Geraetebau Netheler | Laborzentrifuge mit Kühlaggregat |
JP3879360B2 (ja) * | 2000-03-17 | 2007-02-14 | 日立工機株式会社 | 遠心機 |
US6635007B2 (en) * | 2000-07-17 | 2003-10-21 | Thermo Iec, Inc. | Method and apparatus for detecting and controlling imbalance conditions in a centrifuge system |
US20020092802A1 (en) * | 2000-07-17 | 2002-07-18 | Evana Robert R. | Power factor correction for centrifuges |
JP2004064945A (ja) * | 2002-07-31 | 2004-02-26 | Hitachi Koki Co Ltd | 回転体駆動装置 |
-
1999
- 1999-07-16 DE DE19932721A patent/DE19932721C1/de not_active Expired - Lifetime
-
2000
- 2000-06-26 WO PCT/EP2000/005877 patent/WO2001005516A1/de active IP Right Grant
- 2000-06-26 US US10/031,468 patent/US6866621B1/en not_active Expired - Lifetime
- 2000-06-26 JP JP2001510592A patent/JP4365062B2/ja not_active Expired - Lifetime
- 2000-06-26 DE DE50001890T patent/DE50001890D1/de not_active Expired - Lifetime
- 2000-06-26 EP EP00942132A patent/EP1196247B1/de not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2335830A1 (de) * | 2009-12-17 | 2011-06-22 | Eppendorf Ag | Laborzentrifuge mit Kompressorkühlung |
CN102166546A (zh) * | 2009-12-17 | 2011-08-31 | 埃佩多夫股份公司 | 采用压缩机冷却的实验室离心机 |
CN102166546B (zh) * | 2009-12-17 | 2015-11-25 | 埃佩多夫股份公司 | 采用压缩机冷却的实验室离心机 |
Also Published As
Publication number | Publication date |
---|---|
WO2001005516A1 (de) | 2001-01-25 |
JP4365062B2 (ja) | 2009-11-18 |
DE19932721C1 (de) | 2001-01-18 |
JP2003504197A (ja) | 2003-02-04 |
EP1196247A1 (de) | 2002-04-17 |
DE50001890D1 (de) | 2003-05-28 |
US6866621B1 (en) | 2005-03-15 |
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