EP0455876A2 - Centrifugeuse de laboratoire - Google Patents

Centrifugeuse de laboratoire Download PDF

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Publication number
EP0455876A2
EP0455876A2 EP90124322A EP90124322A EP0455876A2 EP 0455876 A2 EP0455876 A2 EP 0455876A2 EP 90124322 A EP90124322 A EP 90124322A EP 90124322 A EP90124322 A EP 90124322A EP 0455876 A2 EP0455876 A2 EP 0455876A2
Authority
EP
European Patent Office
Prior art keywords
housing
air
centrifuge
rotor
container
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.)
Withdrawn
Application number
EP90124322A
Other languages
German (de)
English (en)
Other versions
EP0455876A3 (en
Inventor
Stefan Lorbach
Heinz-Gerhard Dr. Köhn
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.)
Heraeus Sepatech GmbH
Original Assignee
Heraeus Sepatech GmbH
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 Heraeus Sepatech GmbH filed Critical Heraeus Sepatech GmbH
Publication of EP0455876A2 publication Critical patent/EP0455876A2/fr
Publication of EP0455876A3 publication Critical patent/EP0455876A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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

Definitions

  • the invention relates to a laboratory centrifuge with a rotor arranged in a housing with a lid, which is driven by a motor, the drive shaft being oriented vertically, and with a forced air cooling, in which in the direction of the axis of the shaft suction Air takes place.
  • centrifuges are used, for example, in laboratories for the separation of solid particles in liquids, for example from blood cells and the like. Due to the rapid circulation of the rotor in the ambient air and the resulting friction between the rotor surfaces and the ambient air, the rotor and the sample contained therein are heated. Very often, the elevated temperatures can cause side reactions in the sample, which can negatively influence further diagnostic tests. In order to avoid such heating, centrifuges with cooling are known.
  • a centrifuge with a cooling device in which the rotor sucks air from the outside of the housing via air inlet openings formed in the housing cover and leads it as a cooling air flow over the peripheral surface of the rotor from top to bottom .
  • the usual outer contour of the fixed-angle rotor creates a self-priming effect.
  • each In order to prevent suspended matter from being mixed into the centrifuged samples by the cooling air flow or from potentially infectious suspended matter being entrained by the air flow passed through the centrifuge vessel for cooling the sample and which can leave the centrifuge as an aerosol, each must generally individual sample tubes or, if swing-out rotors are used, each individual swivel beaker can be closed with a cap. However, this can lead to complex constructions and uncomfortable handling. Such caps are complex in their construction if they are to form a secure closure. If a centrifuge tube breaks, there is always the problem that the rotor is contaminated. If a centrifuge tube leaks, aerosol formation can occur and the aerosol can escape with the cooling air.
  • the invention has for its object to provide a simple and inexpensive, air-cooled centrifuge, in which cooling air with certainty neither entrains suspended matter in the sample nor takes suspended matter out of the rotor housing even if a sample tube breaks.
  • this object is achieved in the centrifuge specified in the introduction in that the rotor is surrounded by an aerosol-tight container, that a fan wheel is placed on the output-side end of the shaft, and that openings are formed in the bottom surface of the housing below the fan wheel, through which the air is sucked into the housing and is axially distributed along the walls of the container upwards via the fan wheel.
  • the stated construction of the centrifuge achieves a structurally very simple, yet effective cooling.
  • the drive of the centrifuge rotor serves as a drive for the fan wheel on its output-side, lower shaft end, which initially sucks the air over the floor and leads up along the container walls that surround the centrifuge rotor. A heat exchange takes place between the container wall and the cooling air on the outer wall of the container.
  • a temperature in the rotor of 40 ° C. should not be exceeded in centrifuges which are used for centrifuging biological material, for example blood. To maintain these temperature values, it is sufficient to use the ambient air as cooling air without cooling it in the suction area of the fan wheel.
  • the container itself is aerosol-tight, so that there is no exchange between the cooling air and any suspended matter that is created during centrifugation in the vicinity of the rotor by open or leaky centrifuge tubes. It is not absolutely necessary for air outlet openings to be present directly in the area of the top cover. Rather, the air can bounce against an upper cover, which is formed, for example, by the cover of the housing, and the air flow can be guided downward on the rear side of the rotor housing.
  • the lid of the centrifuge housing is a heat exchanger made of a material which is a good heat conductor, for example metal.
  • the air which is directed upwards from the bottom of the container wall and which impacts the lid is cooled via this lid.
  • a very good air circulation can be achieved by distributing the openings below the fan wheel on a surface arranged centrally to the fan wheel axis, the surface being larger than the surface covered in the projection of the fan wheel on the floor. With such dimensions of the openings below the fan wheel, the cooling air can be sucked in through these openings through the fan wheel; the after Air flowing above abuts the upper boundary of the chamber, for example the cover, is directed downward and exits again via the outer openings in the openings below the fan wheel. This ensures sufficient air circulation within the cooling space between the aerosol-tight container and the wall of the centrifuge housing.
  • outlet openings can be arranged on the rear of the housing, which preferably also in the region of the bottom, i. H. are arranged in the lower region of the rear wall.
  • the lid of the housing is preferably used as a lid for the aerosol-tight container.
  • the actual lid of the centrifuge closes the open, upper side of the container in which the rotor runs.
  • a particularly good seal is achieved here by placing a sealing lip on the upper edge of the container, which rests against the underside of the lid of the centrifuge housing. At the same time, this sealing lip is easily accessible, especially for cleaning purposes.
  • the centrifuge has a centrifuge housing 1, which stands on feet 3 on the underside of its bottom surface 2, so that a sufficient distance is formed between a support plane and the underside of the bottom surface 2.
  • a motor 4 is arranged on a base 5 such that its drive shaft 6 is aligned vertically.
  • a centrifuge rotor 7 is placed on the drive shaft 6. With this rotor 7 it is a fixed-angle centrifuge rotor, which has several receptacles for centrifuge tubes 8.
  • the centrifuge rotor 7 itself is surrounded by a container 9 which has outer walls 11 approximately parallel to its side walls 10. The walls of the centrifuge housing extend between the side walls 10 and the outer walls 11.
  • the centrifuge housing 1 On the top of the container 9 there is a circumferential groove in a connecting web 12 between the side walls 10 and the outer walls 11, into which a sealing lip 13 is inserted.
  • the centrifuge housing 1 is closed by a cover 14 which bears sealingly on the sealing lip 13.
  • the centrifuge rotor 7 is completely sealed or encapsulated in an aerosol-tight manner, so that no particles of suspended matter can escape to the outside from this interior space accommodating the centrifuge rotor 7.
  • a fan wheel 16 On the output-side end 15 of the drive shaft 6, which is directed downward toward the bottom surface 2 of the housing 1, a fan wheel 16 is placed, which sucks in air through openings 17 in the bottom surfaces 2 during operation of the centrifuge.
  • the sucked-in cooling air indicated by the flow arrows 18, is distributed radially outward into the chamber between the centrifuge housing 1 and the aerosol-tight container 9 and directed upwards along the side walls 10 of the container 9.
  • the side walls 10 of the container serve as heat exchangers and emit heat to the outside to the cooling air in the interior of the container 9 during centrifugation. This flow pattern is indicated by the further flow arrows 19.
  • An air build-up occurs in the upper area of the container, so that the air pushed up again flows downward in the area of the walls of the centrifuge housing 1, indicated by the returning flow arrows 20, and flows out of the bottom surface 2 through outlet openings 21.
  • the openings 17, 21 in the bottom surface 2 of the centrifuge housing 1 are selected such that the openings 17, 21 are distributed on a center to the fan wheel axis 22 below the fan wheel 16 so that this area is larger than that in the projection of the fan wheel 16 area covered on the floor or floor surface 2. This ensures that the cooling air is sucked in through the openings located further inside is discharged while being heated via the outlet openings 21 located further out on the side walls and the bottom of the container 9.
  • Additional outlet openings 23 on the rear wall of the centrifuge housing 1, preferably in the lower region of the rear wall, can also serve to discharge the heated cooling air to the outside.
  • the outer wall 11 of the container 9 can be omitted and the lid can close the lateral cavity formed between the side wall of the centrifuge housing 1 and the side wall 10 of the container 9 and thus serve as a heat exchanger.

Landscapes

  • Centrifugal Separators (AREA)
EP19900124322 1990-05-05 1990-12-15 Laboratory centrifuge Withdrawn EP0455876A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904014439 DE4014439C1 (en) 1990-05-05 1990-05-05 Laboratory centrifuge, with no contamination risk in cooling system - has air sucked into the housing and distributed by impeller to the side-walls of aerosol tight vessel, which surrounds the rotor
DE4014439 1990-05-05

Publications (2)

Publication Number Publication Date
EP0455876A2 true EP0455876A2 (fr) 1991-11-13
EP0455876A3 EP0455876A3 (en) 1992-02-26

Family

ID=6405763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900124322 Withdrawn EP0455876A3 (en) 1990-05-05 1990-12-15 Laboratory centrifuge

Country Status (2)

Country Link
EP (1) EP0455876A3 (fr)
DE (1) DE4014439C1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19615702C1 (de) * 1996-04-22 1997-10-02 Heraeus Instr Gmbh Labor-Zentrifuge
WO2003000428A1 (fr) * 2001-06-21 2003-01-03 Alphahelix Ab Dispositif de thermocyclage et systeme de rotor correspondant
US7192394B1 (en) * 2005-12-27 2007-03-20 Thermo Fisher Scientific Inc. Air-cooled centrifuge
US7371205B2 (en) * 2002-11-19 2008-05-13 Alphahelix Molecular Diagnostics Ab Device for asymmetric heating and cooling of reaction mixtures during centrifuging and rotor means therefore
US20140349829A1 (en) * 2012-08-24 2014-11-27 Sigma Laborzentrifugen Gmbh Rotor for a laboratory centrifuge
US10350615B2 (en) * 2015-08-27 2019-07-16 Andreas Hettich Gmbh & Co. Kg Centrifuge with gaseous coolant channel

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5490830A (en) * 1994-04-12 1996-02-13 Global Focus Marketing & Distribution Air-cooled biohazard centrifuge
DE19543088C1 (de) * 1995-11-18 1997-03-06 Heraeus Instr Gmbh Laborzentrifuge
CN106861931B (zh) * 2017-03-13 2019-04-05 李明 一种检验科用偏心式离心装置
CN115041309B (zh) * 2022-08-17 2022-10-25 深圳市华晨阳科技有限公司 一种生物基因组织样本离心抽样系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2182159A (en) * 1936-03-25 1939-12-05 American Machine & Metals Centrifugal apparatus
FR1119176A (fr) * 1953-09-04 1956-06-15 Sandoz Sa Procédé et dispositif pour le refroidissement par gaz de rotors de centrifugation tournant dans des carters
DE1033446B (de) * 1955-05-13 1958-07-03 Martin Christ Fa Gekuehlter Rotorraum fuer hochtourige Laborzentrifuge
DE2909787A1 (de) * 1978-03-13 1979-09-20 Kubota Med Appliance Supply Kuehlvorrichtung fuer eine zentrifuge
US4193536A (en) * 1977-09-24 1980-03-18 Kabushiki Kaisha Kubota Seisakusho Cooling structure for a centrifuge

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2182159A (en) * 1936-03-25 1939-12-05 American Machine & Metals Centrifugal apparatus
FR1119176A (fr) * 1953-09-04 1956-06-15 Sandoz Sa Procédé et dispositif pour le refroidissement par gaz de rotors de centrifugation tournant dans des carters
DE1033446B (de) * 1955-05-13 1958-07-03 Martin Christ Fa Gekuehlter Rotorraum fuer hochtourige Laborzentrifuge
US4193536A (en) * 1977-09-24 1980-03-18 Kabushiki Kaisha Kubota Seisakusho Cooling structure for a centrifuge
DE2909787A1 (de) * 1978-03-13 1979-09-20 Kubota Med Appliance Supply Kuehlvorrichtung fuer eine zentrifuge

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19615702C1 (de) * 1996-04-22 1997-10-02 Heraeus Instr Gmbh Labor-Zentrifuge
US5772572A (en) * 1996-04-22 1998-06-30 Heraeus Instruments Gmbh & Co. Kg Laboratory centrifuge having a casing cover and rotor chamber adapted to exhaust circulated air
US5897483A (en) * 1996-04-22 1999-04-27 Kendro Laboratory Products, Gmbh Laboratory centrifuge having a casing cover and rotor chamber adapted to exhaust circulated air
US6068586A (en) * 1996-04-22 2000-05-30 Kendro Laboratory Products Gmbh Laboratory centrifuge having a casing cover and rotor chamber adapted to exhaust circulated air
WO2003000428A1 (fr) * 2001-06-21 2003-01-03 Alphahelix Ab Dispositif de thermocyclage et systeme de rotor correspondant
US7371205B2 (en) * 2002-11-19 2008-05-13 Alphahelix Molecular Diagnostics Ab Device for asymmetric heating and cooling of reaction mixtures during centrifuging and rotor means therefore
US7192394B1 (en) * 2005-12-27 2007-03-20 Thermo Fisher Scientific Inc. Air-cooled centrifuge
US20140349829A1 (en) * 2012-08-24 2014-11-27 Sigma Laborzentrifugen Gmbh Rotor for a laboratory centrifuge
US9079195B2 (en) * 2012-08-24 2015-07-14 Sigma Laborzentrifugen Gmbh Rotor for a laboratory centrifuge with rotor hub cooling means
US10350615B2 (en) * 2015-08-27 2019-07-16 Andreas Hettich Gmbh & Co. Kg Centrifuge with gaseous coolant channel

Also Published As

Publication number Publication date
DE4014439C1 (en) 1991-07-04
EP0455876A3 (en) 1992-02-26

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