DE102010026677B3 - Gas chromatograph, has electrically controllable heating/cooling device provided on separating device in heat conducting contact manner, where heating/cooling device consists of electrical heater and magnetic cooler - Google Patents
Gas chromatograph, has electrically controllable heating/cooling device provided on separating device in heat conducting contact manner, where heating/cooling device consists of electrical heater and magnetic cooler Download PDFInfo
- Publication number
- DE102010026677B3 DE102010026677B3 DE201010026677 DE102010026677A DE102010026677B3 DE 102010026677 B3 DE102010026677 B3 DE 102010026677B3 DE 201010026677 DE201010026677 DE 201010026677 DE 102010026677 A DE102010026677 A DE 102010026677A DE 102010026677 B3 DE102010026677 B3 DE 102010026677B3
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- heating
- cooling device
- gas chromatograph
- substrate
- heat conducting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/30—Control of physical parameters of the fluid carrier of temperature
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/30—Control of physical parameters of the fluid carrier of temperature
- G01N2030/3053—Control of physical parameters of the fluid carrier of temperature using resistive heating
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
Die Erfindung betrifft einen Gaschromatographen mit einer Trenneinrichtung, an der in wärmeleitendem Kontakt eine elektrisch steuerbare Heiz-/Kühlvorrichtung anliegt.The invention relates to a gas chromatograph with a separator to which an electrically controllable heating / cooling device rests in thermally conductive contact.
Ein derartiger Gaschromatograph ist aus der
Die chromatographische Trennung von Komponenten geschieht bei unterschiedlichen Temperaturen unterschiedlich schnell. Idealerweise wird daher in der Prozesschromatographie die chromatographische Trenneinrichtung mit einem Temperaturprogramm betrieben. Dieses erfordert ein Heizen und Kühlen der Trenneinrichtung während unterschiedlicher Zeiten. Die Kühlung erfolgt jedoch relativ langsam oder ist technisch nur aufwändig und teuer zu realisieren.The chromatographic separation of components takes place at different temperatures at different speeds. Ideally, therefore, in process chromatography, the chromatographic separator is operated with a temperature program. This requires heating and cooling of the separator during different times. However, the cooling is relatively slow or technically complex and expensive to implement.
Bei dem aus der
Die Zyklenfestigkeit (maximale Zyklenzahl bis Ausfall) von Peltierelementen ist bei den in der Chromatographiepraxis geforderten Temperaturschwankungen begrenzt.The cycle stability (maximum number of cycles to failure) of Peltier elements is limited to the temperature fluctuations required in chromatography practice.
Der Erfindung liegt die Aufgabe zugrunde, eine schnelle und aufwandsarme Temperierung der Trenneinrichtung eines Gaschromatographen zu erreichen.The invention has for its object to achieve a quick and low-cost tempering of the separator of a gas chromatograph.
Gemäß der Erfindung wird die Aufgabe dadurch gelöst, dass bei dem Gaschromatographen der eingangs angegebenen Art die Heiz-/Kühlvorrichtung aus einer elektrischen Heizung und einem magnetischen Kühler besteht.According to the invention, the object is achieved in that in the gas chromatograph of the type specified, the heating / cooling device consists of an electric heater and a magnetic cooler.
Der magnetokalorische Effekt (MCE) ist seit langem bekannt. Wird magnetisches Material in ein Magnetfeld eingeführt, so beobachtet man eine Erwärmung des Materials, während beim Entnehmen des magnetischen Materials aus dem Magnetfeld eine Abkühlung erfolgt. Der Effekt beruht auf Entropieabnahme beim Anlegen eines magnetischen Feldes und der Entropiezunahme, wenn das magnetische Feld abgebaut wird.The magnetocaloric effect (MCE) has been known for a long time. When magnetic material is introduced into a magnetic field, heating of the material is observed, while cooling occurs when the magnetic material is removed from the magnetic field. The effect is due to entropy decrease when applying a magnetic field and entropy increase when the magnetic field is degraded.
Die aus elektrischer Heizung und magnetischem Kühler bestehende Heiz/Kühlvorrichtung ist in Größe und Leistung besonders einfach skalierbar.The heating / cooling device consisting of electric heater and magnetic cooler is particularly easy to scale in terms of size and performance.
Ein einfacher Aufbau und eine einfache Ansteuerung des magnetischen Kühlers wird dadurch erreicht, dass dieser einen von einem Motor angetriebenen und zwischen zwei Statorhälften laufenden Rotor mit Flügeln aus einem Material mit magnetokalorischem Effekt aufweist, wobei die eine Statorhälfte aus wärmeleitendem Material besteht und mit dem Substrat verbunden oder integraler Bestandteil des Substrats ist und die andere Statorhälfte aus einem Permanentmagneten mit Kühlkörper besteht.A simple structure and a simple control of the magnetic cooler is achieved in that it has a rotor driven by a motor and running between two stator halves with vanes made of a material with magnetocaloric effect, wherein the one stator half consists of thermally conductive material and connected to the substrate or is an integral part of the substrate and the other stator half consists of a permanent magnet with a heat sink.
Der Wärmeabtransport von dem Substrat in die Umgebung kann dadurch verbessert werden, dass die Spalte zwischen dem Rotor und den Statorhälften voneinander getrennt jeweils mit einem von Luft verschiedenen und besser wärmeleitenden Medium gefüllt sind.The removal of heat from the substrate into the environment can be improved by filling the gaps between the rotor and the stator halves separately from each other with a medium which differs from air and has better thermal conductivity.
Die Ansteuerung der elektrischen Heizung und des magnetischen Kühlers erfolgt vorzugsweise durch eine Steuereinrichtung nach Maßgabe eines Temperaturprogramms, wobei die erreichte Ist-Temperatur des Substrats oder der Trenneinrichtung mittels eines Sensors erfasst werden kann.The control of the electric heater and the magnetic cooler is preferably carried out by a control device in accordance with a temperature program, wherein the achieved actual temperature of the substrate or the separating device can be detected by means of a sensor.
Zur weiteren Erläuterung der Erfindung wird im Folgenden auf die einzige Figur der Zeichnung Bezug genommen, die in schematischer Darstellung ein Ausführungsbeispiel des erfindungsgemäßen Gaschromatographen zeigt.To further explain the invention, reference will now be made to the single figure of the drawing, which shows a schematic representation of an embodiment of the gas chromatograph according to the invention.
Dieser besteht aus einer Trenneinrichtung
An oder in dem Substrat
Weiterhin ist ein magnetischer Kühler
Beim Verlassen des Magnetfelds des Permanentmagneten
Die Leistung der elektrischen Heizung
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010026677 DE102010026677B3 (en) | 2010-07-09 | 2010-07-09 | Gas chromatograph, has electrically controllable heating/cooling device provided on separating device in heat conducting contact manner, where heating/cooling device consists of electrical heater and magnetic cooler |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010026677 DE102010026677B3 (en) | 2010-07-09 | 2010-07-09 | Gas chromatograph, has electrically controllable heating/cooling device provided on separating device in heat conducting contact manner, where heating/cooling device consists of electrical heater and magnetic cooler |
Publications (1)
Publication Number | Publication Date |
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DE102010026677B3 true DE102010026677B3 (en) | 2012-01-05 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE201010026677 Expired - Fee Related DE102010026677B3 (en) | 2010-07-09 | 2010-07-09 | Gas chromatograph, has electrically controllable heating/cooling device provided on separating device in heat conducting contact manner, where heating/cooling device consists of electrical heater and magnetic cooler |
Country Status (1)
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DE (1) | DE102010026677B3 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3722947A1 (en) * | 1986-07-11 | 1988-01-21 | Hitachi Ltd | MAGNETIC REFRIGERATOR |
US6706091B1 (en) * | 2002-12-17 | 2004-03-16 | Sandia Corporation | Sub-to super-ambient temperature programmable microfabricated gas chromatography column |
-
2010
- 2010-07-09 DE DE201010026677 patent/DE102010026677B3/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3722947A1 (en) * | 1986-07-11 | 1988-01-21 | Hitachi Ltd | MAGNETIC REFRIGERATOR |
US6706091B1 (en) * | 2002-12-17 | 2004-03-16 | Sandia Corporation | Sub-to super-ambient temperature programmable microfabricated gas chromatography column |
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Date | Code | Title | Description |
---|---|---|---|
R018 | Grant decision by examination section/examining division | ||
R020 | Patent grant now final |
Effective date: 20120406 |
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |