EP1090688B1 - Zentrifuge mit einem Rotor mit mindestens einer Behälteraufnahme für ein zu zentrifugierendes Produkt und Deckel dafür - Google Patents

Zentrifuge mit einem Rotor mit mindestens einer Behälteraufnahme für ein zu zentrifugierendes Produkt und Deckel dafür Download PDF

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Publication number
EP1090688B1
EP1090688B1 EP00402726A EP00402726A EP1090688B1 EP 1090688 B1 EP1090688 B1 EP 1090688B1 EP 00402726 A EP00402726 A EP 00402726A EP 00402726 A EP00402726 A EP 00402726A EP 1090688 B1 EP1090688 B1 EP 1090688B1
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EP
European Patent Office
Prior art keywords
rotor
centrifuge
detected
housing
centrifuge according
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
EP00402726A
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English (en)
French (fr)
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EP1090688A1 (de
Inventor
Jean Louis Fondin
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.)
Jouan SA
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Jouan SA
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Publication date
Application filed by Jouan SA filed Critical Jouan SA
Publication of EP1090688A1 publication Critical patent/EP1090688A1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/02—Casings; Lids
    • B04B7/06—Safety devices ; Regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/04—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers
    • B04B5/0407—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles
    • B04B5/0414—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles comprising test tubes
    • B04B5/0421—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles comprising test tubes pivotably mounted

Definitions

  • the present invention relates to a centrifuge, of the type comprising a rotor, which has at least one receiving housing of a product to centrifuge and an associated closure lid of said housing, the centrifuge also comprising a motor on which the rotor is mounted to drive it in rotation about an axis of rotation.
  • the invention applies, for example, to centrifugation of products organic.
  • lids are particularly important for centrifugation hazardous organic products. Indeed, if the containers containing such products are open or if they break, centrifugation will give birth to an aerosol carrying dangerous substances.
  • lids then makes it possible to confine such an aerosol to within the dwellings.
  • US-A-4,342,419 discloses a centrifuge according to the preamble of claim 1.
  • the invention aims to solve this problem by providing a centrifuge of the aforementioned type to limit the risks associated with centrifugation a rotor whose housing is not closed by its cover.
  • the subject of the invention is a centrifuge of the aforementioned type, characterized in that it comprises means for controlling the presence, for each housing, the associated cover to prevent the execution of a centrifugation cycle in case the cover of a housing is missing.
  • the subject of the invention is also an assembly comprising a centrifuge as defined above and several rotors that can be mounted on the centrifuge motor, each rotor having at least one housing for receiving a product to be centrifuged and an associated lid for closing said housing, characterized in that each rotor comprises the same number of element (s) to be detected.
  • FIG. 1 is a schematic view of a centrifuge 1 which comprises essentially a rotor 2, an electric motor 3 for rotating drive rotor 2 about a vertical axis A, and a microprocessor unit 4 of engine control 3.
  • the rotor 2 mounted above the engine 3, comprises two nacelles 6 diametrically opposed and articulated by horizontal shafts on arms 7 of the rotor 2.
  • Each nacelle 6 forms a container receiving housing of a product to be centrifuged, and comprises a removable closure cover 8.
  • the covers 8 provide a sealed closure of the defined dwellings internally by the nacelles 6.
  • Each cover 8 is surmounted by a central support 10 fixed U by its base on the cover 8 considered.
  • the upper free ends of supports 10 each carry a magnet 11.
  • the four magnets 11 are arranged substantially at the same distance R1 from the axis A.
  • these four magnets are arranged substantially on the same geometric circle C1 ( Figure 2) centered on the axis A, and radius R1.
  • Centrifuge 1 also includes two magnetoresistive sensors 13 and 14 disposed above the rotor 2.
  • the sensor 13 is disposed substantially at the distance R1 of the axis A, as shown in FIG. 2, where the angular position of the rotor 2 and the Sensors 13 and 14 has been modified from that of Figure 1 for reasons clarity.
  • the sensor 14 is disposed in the same radial direction as the sensor 13, but approximately at a distance R2 from the axis A, with R2 ⁇ R1.
  • the sensor 14 is also disposed at a lower level than that of the sensor 13 along axis A.
  • the sensors 13 and 14 may, for example, be worn by the ends free of a U-shaped backing, itself carried by the movable cover of a not shown enclosure, inside which the rotor 2 is disposed.
  • the control unit 4 is connected to the sensors 13 and 14, as well as than a sensor 16 for measuring the rotation of the rotor 2.
  • the sensor 16 is, for example, example, the sensor usually associated with the output shaft of the motor 3 for measure the rotational speed of this shaft during centrifugation cycles put implemented by the centrifuge 1.
  • Unit 4 is also connected to the electric motor 3 to ensure its order to run centrifugation cycles of products arranged in the nacelles 6.
  • Unit 4 is especially programmed to ensure, before any cycle centrifugation, a preliminary step to check the presence of the lids 8, a step that will now be described.
  • the unit 4 controls the drive in rotation, for example during two turns, of the rotor 2 at a speed below 50 rpm, and preferably at a speed between 20 and 30 rpm. At this low rotation speed, the nacelles 6 retain their positions in FIGS. 1 and 2, and no aerosol is likely to become form.
  • the unit 4 compares the number of magnets 11 detected by the sensor 13.
  • the unit 4 controls the execution of the centrifugation cycle planned.
  • the unit 4 commands the stopping of the engine 3.
  • the cycle centrifugation is not performed. This case corresponds to the absence of minus one cover 8. The operator must then close the platform (s) 6 corresponding (s).
  • FIG. 3 illustrates the centrifuge of FIG. 1 in which the rotor 2 to nacelles 6 has been replaced by a rotor 18 of generally frustoconical shape converging upwards.
  • the rotor 18 has several housings 19 for bulbs or other containers for containing centrifugal products.
  • One home 19 is visible thanks to the tearing of FIG.
  • the rotor 18 is surmounted by a single closure cap 20 for closing 19.
  • the lid 20 is itself surmounted by a central crown 21 supporting four magnets 11. These magnets 11 are regularly distributed angularly and are substantially arranged on a circle C2 centered on the axis A and of radius R2.
  • the unit of command 4 provides, as before, a preliminary step of controlling the presence of the lid 20.
  • the unit 4 commands the stop 3. In the opposite case, the centrifugation cycle is carried out normally.
  • the centrifuge 1 thus makes it possible to limit the risks of centrifugation of a rotor in the absence of a closure cover of a receiving housing of product to be centrifuged.
  • all the rotors that can be used with the centrifuge 1 are equipped with four magnets, or more generally of the same number magnets, to simplify the microprocessor programming algorithm of the control unit 4.
  • different types of rotor may be equipped with a different number of magnets.
  • the centrifuge 1 is then preferably equipped with rotor type detection means mounted on the motor 3, to determine the number of magnets 11 to be detected per rotor revolution, when the preliminary step of checking the presence of the lid (s).
  • the arrangement of the sensors 13 and 14 at different levels relative to to the axis A ensures, for the different types of rotor usable with the centrifuge 1, that the distance between the magnets 11 to be detected and the sensor 13 or 14 opposite which they will pass is less than about 30 mm. So, the risks that the sensors 13 and 14 do not detect a magnet 11 passing through look at these are weak.
  • the number of sensors 13 and 14 can be more importantly, these sensors being preferably arranged on centered circles on axis A and different radii, and possibly at different levels with respect to axis A.
  • means 11, 13 and 14 magnetic detection of the presence of lid (s) allows satisfactory detection even when the rotor is arranged in a refrigerated enclosure. Indeed, the operation of these magnetic detection means is relatively insensitive to the phenomena condensation that can appear in such a chamber.
  • the detection means can however be optical or ultrasonic means and, more generally, magnets 11 and the sensors 13 and 14 can be replaced by elements to be detected and corresponding sensors, that is to say able to detect these elements.

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  • Centrifugal Separators (AREA)

Claims (11)

  1. Zentrifuge (1) mit einem Rotor (2; 18), der mindestens ein Behältnis (6; 19) zur Aufnahme eines zu zentrifugierenden Produkts und einen zugeordneten Deckel (8; 20) zum Verschließen dieses Behältnisses aufweist, wobei die Zentrifuge ferner einen Motor (3) besitzt, auf dem der Rotor montiert ist, um ihn um eine Drehachse (A) in Drehung zu versetzen, dadurch gekennzeichnet, dass sie Mittel (4, 11, 13, 14, 16) zur Überwachung des Vorhandenseins des zugeordneten Deckels bei jedem Behältnis (6; 19) aufweist, um die Ausführung eines Schleuderzyklus in dem Fall, in dem der Dekkel (8; 20) eines Behältnisses nicht vorhanden ist, zu verhindern.
  2. Zentrifuge nach Anspruch 1, dadurch gekennzeichnet, dass die Überwachungsmittel mindestens ein zu erfassendes Element (11) auf jedem Deckel (8; 20) und mindestens einen entsprechenden Fühler umfassen.
  3. Zentrifuge nach Anspruch 2, dadurch gekennzeichnet, dass sie eine Einheit (4) zur Steuerung des Motors (3) umfasst, die dafür ausgelegt ist, einen Schritt der Überwachung des Vorhandenseins des zugeordneten Deckels (8; 20) bei jedem Behältnis (6; 19) zu gewährleisten, wobei während dieses Schritts die Einheit (4) den Drehantrieb des Rotors (2; 18) steuert, die Anzahl von erfassten Elementen (11) mit der Gesamtzahl von Elementen vergleicht, die zu erfassen sind, wenn jeder Deckel (8; 20) vorhanden wäre, und die Ausführung eines Schleuderzyklus in dem Fall verhindert, in dem die Anzahl von erfassten Elementen (11) kleiner als die Gesamtanzahl von zu erfassenden Elementen (11) ist.
  4. Zentrifuge nach Anspruch 3, dadurch gekennzeichnet, dass die Steuereinheit (4) dafür ausgelegt ist, den Überwachungsschritt vor jedem Schleuderzyklus des Rotors auszuführen.
  5. Zentrifuge nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass die Steuereinheit (4) während des Überwachungsschritts den Drehantrieb des Rotors mit einer Geschwindigkeit steuert, bei der nicht die Gefahr der Bildung eines Aerosols besteht.
  6. Zentrifuge nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass sie Mittel zur Erfassung des Typs des auf dem Motor (3) montierten Rotors aufweist und dass die Steuereinheit (4) dafür ausgelegt ist, die Gesamtzahl von zu erfassenden Elementen (11) in Abhängigkeit vom Typ des erfassten Rotors zu bestimmen.
  7. Zentrifuge nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, dass die Steuereinheit (4) Speichermittel umfasst, in denen eine feste Gesamtzahl von zu erfassenden Elementen (11) unabhängig von dem Typ des auf dem Motor (3) montierten Rotors gespeichert ist.
  8. Zentrifuge nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, dass die Überwachungsmittel mehrere Fühler (13, 14) umfassen, die in verschiedenen Abständen (R1, R2) von der Drehachse (A) angeordnet sind.
  9. Zentrifuge nach Anspruch 8, dadurch gekennzeichnet, dass mehrere Fühler (13, 14) bezüglich der Drehachse (A) auf verschiedenen Höhen angeordnet sind.
  10. Zentrifuge nach einem der Ansprüche 2 bis 9, dadurch gekennzeichnet, dass jedes zu erfassende Element (11) ein Magnet ist.
  11. Einheit, umfassend eine Zentrifuge nach einem der Ansprüche 2 bis 10 und mehrere Rotoren, die auf dem Motor (3) der Zentrifuge (1) montiert werden können, wobei jeder Rotor mindestens ein Behältnis (6; 19) zur Aufnahme eines zu zentrifugierenden Produkts und einen zugeordneten Deckel (8; 20) zum Verschließen dieses Behältnisses aufweist, dadurch gekennzeichnet, dass jeder Rotor (2; 18) dieselbe Anzahl von zu erfassenden Elementen (11) aufweist.
EP00402726A 1999-10-08 2000-10-04 Zentrifuge mit einem Rotor mit mindestens einer Behälteraufnahme für ein zu zentrifugierendes Produkt und Deckel dafür Expired - Lifetime EP1090688B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9912580 1999-10-08
FR9912580A FR2799395B1 (fr) 1999-10-08 1999-10-08 Centrifugeuse a rotor presentant au moins un logement de reception d'un produit a centrifuger et un couvercle associe de fermeture, et ensemble comprenant une telle centrifugeuse et plusieurs rotors

Publications (2)

Publication Number Publication Date
EP1090688A1 EP1090688A1 (de) 2001-04-11
EP1090688B1 true EP1090688B1 (de) 2005-08-17

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EP00402726A Expired - Lifetime EP1090688B1 (de) 1999-10-08 2000-10-04 Zentrifuge mit einem Rotor mit mindestens einer Behälteraufnahme für ein zu zentrifugierendes Produkt und Deckel dafür

Country Status (6)

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US (1) US6383126B1 (de)
EP (1) EP1090688B1 (de)
JP (1) JP2001157856A (de)
AT (1) ATE302066T1 (de)
DE (1) DE60021974T2 (de)
FR (1) FR2799395B1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1270078B1 (de) * 2001-06-22 2004-09-15 Jouan Italia S.R.L. Vorrichtung und Verfahren zum automatischen Be- und Entladen von Zentrifugenbechern
JP2003225589A (ja) * 2002-02-01 2003-08-12 Hitachi Koki Co Ltd 遠心機
US7837607B2 (en) * 2006-12-13 2010-11-23 Thermo Fisher Scientific Inc. Centrifuge rotor assembly and method of connection thereof
FR2951963B1 (fr) * 2009-11-04 2011-12-23 Bms Internat Centrifugeuse comprenant des moyens de detection d'un defaut d'horizontalite susceptibles
FR2951965B1 (fr) * 2009-11-04 2012-04-06 Bms Internat Centrifugeuse integrant des moyens tachymetriques montes dans une partie superieure de l'enceinte, en particulier montes sur le couvercle
EP3102334A4 (de) * 2014-01-22 2017-11-22 Theranos, Inc. Schnelle, kompakte zentrifuge zur verwendung mit kleinen probenvolumina
JP6572009B2 (ja) * 2015-06-19 2019-09-04 株式会社久保田製作所 遠心分離機のスイング型ロータ用バケット
EP3755160B1 (de) * 2018-04-20 2021-11-03 Pacotrade AG Vorrichtung zum zerkleinern von in blockform bereitgestellten tiefgefrorenen lebensmitteln
CN111804445B (zh) * 2020-07-14 2021-06-11 无锡市妇幼保健院 一种离心机运行中自动锁定的生物细胞试管架
CN112354689A (zh) * 2020-11-12 2021-02-12 李治明 一种提高安全性的旋转式生物离心机
CN113058756B (zh) * 2021-03-18 2022-08-30 药明激创(佛山)生物科技有限公司 一种可自动调节的生物实验装置

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US2779537A (en) * 1950-08-01 1957-01-29 Samuel D Jarvis Fluid contacting apparatus
US3970245A (en) * 1975-05-21 1976-07-20 Dr. Molter Gmbh Universal centrifuge
US4342419A (en) * 1980-10-31 1982-08-03 Beckman Instruments, Inc. Safety cover for centrifuge bucket
JPS58128649U (ja) * 1982-02-19 1983-08-31 株式会社久保田製作所 遠心分離機
FI864811A (fi) * 1985-12-11 1987-06-12 Kontron Holding Ag Centrifug.
US5037371A (en) * 1986-12-10 1991-08-06 E. I. Du Pont De Nemours And Company Rotor recognition system
US5235864A (en) * 1990-12-21 1993-08-17 E. I. Du Pont De Nemours And Company Centrifuge rotor identification system based on rotor velocity
US5221250A (en) * 1991-01-07 1993-06-22 Beckman Instruments, Inc. Coding of maximum operating speed on centrifuge rotors and detection thereof
JP2514554B2 (ja) * 1992-12-28 1996-07-10 株式会社久保田製作所 遠心機
US5518493A (en) * 1994-07-07 1996-05-21 Beckman Instruments, Inc. Automatic rotor identification based on a rotor-transmitted signal
JPH09117695A (ja) * 1995-10-26 1997-05-06 Hitachi Koki Co Ltd 遠心機
US5649893A (en) * 1996-05-22 1997-07-22 Hitachi Koki Co., Ltd. Centrifugal apparatus having series-implemented protection means

Also Published As

Publication number Publication date
DE60021974T2 (de) 2006-05-18
US6383126B1 (en) 2002-05-07
ATE302066T1 (de) 2005-09-15
EP1090688A1 (de) 2001-04-11
DE60021974D1 (de) 2005-09-22
FR2799395B1 (fr) 2001-12-21
FR2799395A1 (fr) 2001-04-13
JP2001157856A (ja) 2001-06-12

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