EP1090688B1 - Centrifugeuse à rotor présentant au moins un logement de réception d'un produit à centrifuger et un couvercle associé de fermeture - Google Patents
Centrifugeuse à rotor présentant au moins un logement de réception d'un produit à centrifuger et un couvercle associé de fermeture Download PDFInfo
- 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
- Authority
- 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
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Classifications
-
- 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.
Landscapes
- Centrifugal Separators (AREA)
Description
- lesdits moyens de contrôle comprennent au moins un élément à détecter sur chaque couvercle et au moins un capteur correspondant,
- la centrifugeuse comprend une unité de commande du moteur adaptée pour assurer une étape de contrôle de la présence pour chaque logement du couvercle associé, étape au cours de laquelle ladite unité commande l'entraínement en rotation du rotor, compare le nombre d'élément(s) détecté(s) avec le nombre total d'élément(s) à détecter si chaque couvercle était présent, et empêche l'exécution d'un cycle de centrifugation au cas où le nombre d'élément(s) détecté(s) est inférieur au nombre total d'élément(s) à détecter,
- l'unité de commande est adaptée pour assurer l'étape de contrôle avant d'exécuter chaque cycle de centrifugation du rotor,
- pendant ladite étape de contrôle, l'unité de commande commande l'entraínement en rotation du rotor à une vitesse inférieure à environ 50 tr/mn,
- la centrifugeuse comprend des moyens de détection du type du rotor monté sur le moteur, et l'unité de commande est adaptée pour déterminer le nombre total d'élément(s) à détecter en fonction du type du rotor détecté,
- l'unité de commande comprend des moyens de mémorisation dans lesquels est stocké un nombre total fixe d'élément(s) à détecter quel que soit le type du rotor monté sur le moteur,
- lesdits moyens de contrôle comprennent plusieurs capteurs disposés à des distances différentes de l'axe de rotation,
- plusieurs desdits capteurs sont disposés à des niveaux différents par rapport à l'axe de rotation,
- chaque élément à détecter est un aimant.
- la figure 1 est une vue schématique latérale d'une centrifugeuse selon l'invention,
- la figure 2 est une vue schématique de dessus et agrandie, illustrant la position radiale respective du rotor et des capteurs de la centrifugeuse de la figure 1, et
- la figure 3 est une vue analogue à la figure 2, partiellement arrachée, illustrant l'utilisation dans la centrifugeuse de la figure 1 d'un autre type de rotor.
Claims (11)
- Centrifugeuse (1), du type comprenant un rotor (2 ; 18), qui présente au moins un logement (6 ; 19) de réception d'un produit à centrifuger et un couvercle associé (8 ; 20) de fermeture dudit logement, la centrifugeuse comprenant également un moteur (3) sur lequel le rotor est monté pour l'entraíner en rotation autour d'un axe de rotation (A), caractérisée en ce qu'elle comprend des moyens (4, 11, 13, 14, 16) de contrôle de la présence, pour chaque logement (6 ; 19), du couvercle associé pour empêcher l'exécution d'un cycle de centrifugation au cas où le couvercle (8 ; 20) d'un logement serait absent.
- Centrifugeuse selon la revendication 1, caractérisée en ce que lesdits moyens de contrôle comprennent au moins un élément (11) à détecter sur chaque couvercle (8 ; 20) et au moins un capteur correspondant.
- Centrifugeuse selon la revendication 2, caractérisée en ce qu'elle comprend une unité (4) de commande du moteur (3) adaptée pour assurer une étape de contrôle de la présence pour chaque logement (6 ; 19) du couvercle (8 ; 20) associé, étape au cours de laquelle ladite unité (4) commande l'entraínement en rotation du rotor (2 ; 18), compare le nombre d'élément(s) (11) détecté(s) avec le nombre total d'élément(s) à détecter si chaque couvercle (8 ; 20) était présent, et empêche l'exécution d'un cycle de centrifugation au cas où le nombre d'élément(s) détecté(s) (11) est inférieur au nombre total d'élément(s) (11) à détecter.
- Centrifugeuse selon la revendication 3, caractérisée en ce que l'unité de commande (4) est adaptée pour assurer l'étape de contrôle avant d'exécuter chaque cycle de centrifugation du rotor.
- Centrifugeuse selon la revendication 3 ou 4, caractérisée en ce que, pendant ladite étape de contrôle, l'unité de commande (4) commande l'entraínement en rotation du rotor à une vitesse où aucun aérosol ne risque de se former.
- Centrifugeuse selon l'une quelconque des revendications 3 à 5, caractérisée en ce qu'elle comprend des moyens de détection du type du rotor monté sur le moteur (3), et en ce que l'unité de commande (4) est adaptée pour déterminer le nombre total d'élément(s) (11) à détecter en fonction du type du rotor détecté.
- Centrifugeuse selon l'une quelconque des revendications 2 à 6, caractérisée en ce que l'unité de commande (4) comprend des moyens de mémorisation dans lesquels est stocké un nombre total fixe d'élément(s) (11) à détecter quel que soit le type du rotor monté sur le moteur (3).
- Centrifugeuse selon l'une quelconque des revendications 2 à 7, caractérisée en ce que lesdits moyens de contrôle comprennent plusieurs capteurs (13, 14) disposés à des distances (R1, R2) différentes de l'axe de rotation (A).
- Centrifugeuse selon la revendication 8, caractérisée en ce que plusieurs desdits capteurs (13, 14) sont disposés à des niveaux différents par rapport à l'axe de rotation (A).
- Centrifugeuse selon l'une quelconque des revendications 2 à 9, caractérisée en ce que chaque élément (11) à détecter est un aimant.
- Ensemble comprenant une centrifugeuse selon l'une quelconque des revendications 2 à 10 et plusieurs rotors pouvant être montés sur le moteur (3) de la centrifugeuse (1), chaque rotor présentant au moins un logement (6 ; 19) de réception d'un produit à centrifuger et un couvercle associé (8 ; 20) de fermeture dudit logement, caractérisé en ce que chaque rotor (2 ; 18) comprend le même nombre d'élément(s) (11) à détecter.
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 (fr) | 2001-04-11 |
EP1090688B1 true EP1090688B1 (fr) | 2005-08-17 |
Family
ID=9550720
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00402726A Expired - Lifetime EP1090688B1 (fr) | 1999-10-08 | 2000-10-04 | Centrifugeuse à rotor présentant au moins un logement de réception d'un produit à centrifuger et un couvercle associé de fermeture |
Country Status (6)
Country | Link |
---|---|
US (1) | US6383126B1 (fr) |
EP (1) | EP1090688B1 (fr) |
JP (1) | JP2001157856A (fr) |
AT (1) | ATE302066T1 (fr) |
DE (1) | DE60021974T2 (fr) |
FR (1) | FR2799395B1 (fr) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1270078B1 (fr) * | 2001-06-22 | 2004-09-15 | Jouan Italia S.R.L. | Appareil et procédé pour charger et décharger, automatiquement de godets pour centrifugeuse |
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 |
CA2937060C (fr) * | 2014-01-22 | 2023-01-03 | Theranos, Inc. | Centrifugeuse compacte a grande vitesse pour l'utilisation avec de petits volumes d'echantillon |
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 |
HRP20220040T1 (hr) * | 2018-04-20 | 2022-04-15 | Pacotrade Ag | Uređaj za usitnjavanje duboko zamrznutih prehrambenih proizvoda pripremljenih u obliku blokova |
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 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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. |
JPH0657325B2 (ja) * | 1986-12-10 | 1994-08-03 | イー・アイ・デュポン・ドゥ・ヌムール・アンド・コンパニー | ロータ認識装置 |
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 |
-
1999
- 1999-10-08 FR FR9912580A patent/FR2799395B1/fr not_active Expired - Fee Related
-
2000
- 2000-10-04 DE DE60021974T patent/DE60021974T2/de not_active Expired - Fee Related
- 2000-10-04 AT AT00402726T patent/ATE302066T1/de not_active IP Right Cessation
- 2000-10-04 EP EP00402726A patent/EP1090688B1/fr not_active Expired - Lifetime
- 2000-10-05 US US09/679,644 patent/US6383126B1/en not_active Expired - Fee Related
- 2000-10-10 JP JP2000309039A patent/JP2001157856A/ja not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
JP2001157856A (ja) | 2001-06-12 |
DE60021974T2 (de) | 2006-05-18 |
FR2799395B1 (fr) | 2001-12-21 |
US6383126B1 (en) | 2002-05-07 |
DE60021974D1 (de) | 2005-09-22 |
ATE302066T1 (de) | 2005-09-15 |
EP1090688A1 (fr) | 2001-04-11 |
FR2799395A1 (fr) | 2001-04-13 |
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