EP0410151A1 - Infrared radiator with electrical heating coil - Google Patents
Infrared radiator with electrical heating coil Download PDFInfo
- Publication number
- EP0410151A1 EP0410151A1 EP90112108A EP90112108A EP0410151A1 EP 0410151 A1 EP0410151 A1 EP 0410151A1 EP 90112108 A EP90112108 A EP 90112108A EP 90112108 A EP90112108 A EP 90112108A EP 0410151 A1 EP0410151 A1 EP 0410151A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating coil
- tube
- temperature sensor
- infrared radiator
- infrared
- 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- Withdrawn
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/44—Heating elements having the shape of rods or tubes non-flexible heating conductor arranged within rods or tubes of insulating material
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/032—Heaters specially adapted for heating by radiation heating
Definitions
- the invention relates to an infrared radiator with arranged within a cladding tube electric heating coil and a temperature sensor.
- Infrared radiators of the aforementioned type are known from US-PS 3,614,387.
- an electrical heating coil is embedded in an electrically conductive insulating material of, for example, magnesium oxide or boron nitride in a metal cladding tube.
- the metallic cladding tube is closed at both ends by means of a plug.
- a thermocouple is arranged as a temperature sensor on the inside thereof. In such an arrangement, the temperature detection of the heating coil is associated with significant time delays, so that is to be expected for a constant temperature control with a larger hysteresis.
- the object of the present invention has been made to provide an infrared radiator with electric heating coil, so that a power control in dependence of the heating coil temperature is ensured with very high accuracy and response speed.
- the heating coil is wound on a support tube made of silica-containing material, which is arranged with play within a cladding tube, and that within the support tube of the temperature sensor is arranged.
- the carrier tube preferably consists of quartz material or quartz glass permeable to infrared radiation. As materials for the cladding quartz, quartz glass or highly silicate glass have proven.
- the carrier tube preferably passes through the wall of the cladding tube in the region of one end of the cladding tube.
- the temperature sensor is slidably disposed within the cladding tube, so that, if necessary, during operation of the infrared radiator, the temperature of different Schuetzl Symposiume can be detected by moving the temperature sensor within the support tube.
- a thermocouple As a temperature sensor, a thermocouple has been proven, but other temperature sensors can be arranged within the support tube.
- the support tube itself is advantageously designed as a capillary tube with an inner diameter in the range of 0.5 to 2 mm. Its wall thickness is in the range of 0.5 to 2 mm.
- the inventive design of the infrared emitter in particular the arrangement of the temperature sensor within the infrared radiation permeable material formed carrier tube for the heating coil, allows a high response of the temperature sensor to the temperature of the heating coil and thus a hysteresis-free power control of Schuetzltemperatur.
- the displaceable arrangement of the temperature sensor within the support tube makes it possible to influence during operation of the infrared emitter also on process-related disturbances and to optimize the power control.
- an embodiment of an infrared emitter is shown schematically.
- the electric heating coil 2 is wound and the support tube 1 is positioned by means of spacers 3 within the cladding tube 4 made of quartz glass.
- the two cladding tube ends are closed with ceramic plugs 5 and 6.
- the support tube 1 is guided at one end of the cladding tube through the wall thereof.
- the temperature sensor 7th inserted in the support tube 1 in the support tube 1, the temperature sensor 7th inserted. It can also be displaced back and forth within the support tube 1 during the operation of the infrared radiator so that, for example when using a thermocouple as a temperature sensor, the hot solder joint 8 can be positioned in different regions of the heating coil 2 and thus also during operation of the infrared coil. Spotlight the temperature of individual Schuchtl Symposium Edition can be detected.
- the heating coil 2 is connected by means of the connecting line 9, 10 with a source of electrical power.
Landscapes
- Resistance Heating (AREA)
Abstract
Description
Die Erfindung bezieht sich auf einen Infrarot-Strahler mit innerhalb eines Hüllrohres angeordneter elektrischer Heizwendel und einem Temperatursensor.The invention relates to an infrared radiator with arranged within a cladding tube electric heating coil and a temperature sensor.
Infrarot-Strahler der vorgenannten Art sind aus der US-PS 3,614,387 bekannt. Bei diesen bekannten Infrarot-Strahlern ist in einem Metallhüllrohr eine elektrische Heizwendel in elektrisch-isolierendem Material aus beispielsweise Magnesiumoxid oder Bornitrid eingebettet. Das metallische Hüllrohr ist an seinen beiden Enden mittels eines Stopfens verschlossen. Zur Messung der Temperatur des Hüllrohres ist auf dessen Innenseite ein Thermoelement als Temperatursensor angeordnet. Bei einer solchen Anordnung ist die Temperaturerfassung der Heizwendel mit erheblichen Zeitverzögerungen verbunden, so daß für eine Konstanttemperaturregelung mit einer größeren Hysterese zu rechnen ist.Infrared radiators of the aforementioned type are known from US-PS 3,614,387. In these known infrared emitters, an electrical heating coil is embedded in an electrically conductive insulating material of, for example, magnesium oxide or boron nitride in a metal cladding tube. The metallic cladding tube is closed at both ends by means of a plug. For measuring the temperature of the cladding tube, a thermocouple is arranged as a temperature sensor on the inside thereof. In such an arrangement, the temperature detection of the heating coil is associated with significant time delays, so that is to be expected for a constant temperature control with a larger hysteresis.
Bekannt sind aus der Zeitschrift "ELEKTRO-WELT, 4. Jahrgang 1959, Ausgabe C, Nr. 5, Seite 114" Infrarot-Strahler mit einer elektrischen Heizwendel, die auf ein Quarzträgerrohr aufgewickelt ist und in einem Hüllrohr aus Quarzglas oder Quarzgut angeordnet ist.Are known from the magazine "ELECTRIC WORLD, 4th year 1959, Issue C, No. 5, page 114" infrared radiator with an electric heating coil, which is wound on a quartz carrier tube and is arranged in a cladding of quartz glass or quartz.
Die vorliegende Erfindung hat sich die Aufgabe gestellt, einen Infrarot-Strahler mit elektrischer Heizwendel zu schaffen, so daß eine Leistungsregelung in Abhängigkeit der Heizwendel-Temperatur mit sehr hoher Genauigkeit und Ansprechgeschwindigkeit gewährleistet ist.The object of the present invention has been made to provide an infrared radiator with electric heating coil, so that a power control in dependence of the heating coil temperature is ensured with very high accuracy and response speed.
Gelöst wird diese Aufgabe für einen Infrarot-Strahler der eingangs charakterisierten Art dadurch, daß die Heizwendel auf ein Trägerohr aus Siliziumdioxid-haltigem Werkstoff aufgewickelt ist, das mit Spiel innerhalb eines Hüllrohres angeordnet ist, und daß innerhalb des Trägerohres der Temperatursensor angeordnet ist. Bevorzugt besteht das Trägerrohr aus für Infrarot-Strahlung durchlässigem Quarzgut oder Quarzglas. Als Werkstoffe für das Hüllrohr haben sich Quarzgut, Quarzglas oder hochsilikatisches Glas bewährt. Das Trägerrohr tritt bevorzugt im Bereich eines Endes des Hüllrohres durch die Wand des Hüllrohres hindurch. Der Temperatursensor ist innerhalb des Hüllrohres verschiebbar angeordnet, so daß erforderlichenfalls während des Betriebes des Infrarot-Strahlers die Temperatur verschiedener Heizwendelbereiche durch Verschieben des Temperatursensors innerhalb des Trägerrohres erfaßt werden können. Als Temperatursensor hat sich ein Thermoelement bewährt, jedoch können auch andere Temperatursensoren innerhalb des Trägerrohres angeordnet werden. Das Trägerrohr selbst ist vorteilhafterweise als Kapillarrohr ausgebildet mit einem Innendurchmesser im Bereich von 0,5 bis 2 mm. Seine Wandstärke liegt im Bereich von 0,5 bis 2 mm. Die erfindungsgemäße Ausbildung des Infrarot-Strahlers, insbesondere die Anordnung des Temperatursensors innerhalb des aus Infrarot-Strahlung durchlässigem Werkstoff ausgebildeten Trägerrohres für die Heizwendel, ermöglicht eine hohe Ansprechgeschwindigkeit des Temperatursensors auf die Temperatur der Heizwendel und damit eine Hysterese-freie Leistungsregelung der Heizwendeltemperatur. Die verschiebbare Anordnung des Temperatursensors innerhalb des Trägerrohres ermöglicht es, während des Betriebes des Infrarot-Strahlers auch auf prozeßbedingte Störgrößen Einfluß zu nehmen und die Leistungsregelung zu optimieren.This object is achieved for an infrared emitter of the type characterized character in that the heating coil is wound on a support tube made of silica-containing material, which is arranged with play within a cladding tube, and that within the support tube of the temperature sensor is arranged. The carrier tube preferably consists of quartz material or quartz glass permeable to infrared radiation. As materials for the cladding quartz, quartz glass or highly silicate glass have proven. The carrier tube preferably passes through the wall of the cladding tube in the region of one end of the cladding tube. The temperature sensor is slidably disposed within the cladding tube, so that, if necessary, during operation of the infrared radiator, the temperature of different Heizwendelbereiche can be detected by moving the temperature sensor within the support tube. As a temperature sensor, a thermocouple has been proven, but other temperature sensors can be arranged within the support tube. The support tube itself is advantageously designed as a capillary tube with an inner diameter in the range of 0.5 to 2 mm. Its wall thickness is in the range of 0.5 to 2 mm. The inventive design of the infrared emitter, in particular the arrangement of the temperature sensor within the infrared radiation permeable material formed carrier tube for the heating coil, allows a high response of the temperature sensor to the temperature of the heating coil and thus a hysteresis-free power control of Heizwendeltemperatur. The displaceable arrangement of the temperature sensor within the support tube makes it possible to influence during operation of the infrared emitter also on process-related disturbances and to optimize the power control.
In der Figur ist ein Ausführungsbeispiel eines erfindungsgemäßen Infrarot-Strahlers schematisch dargestellt. Auf einem Trägerrohr 1 ist die elektrische Heizwendel 2 aufgewickelt und das Trägerrohr 1 mittels der Distanzhalter 3 innerhalb des Hüllrohres 4 aus Quarzglas positioniert. Die beiden Hüllrohrenden sind mit Keramikstopfen 5 und 6 verschlossen. Wie ersichtlich, ist das Trägerrohr 1 an dem einen Ende des Hüllrohres durch dessen Wand hindurchgeführt. In das Trägerrohr 1 ist der Temperatursensor 7 eingeschoben. Er kann innerhalb des Trägerrohres 1 auch während des Betriebes des Infrarot-Strahlers hin und her verschoben werden, so daß beispielsweise bei Verwendung eines Thermoelementes als Temperatursensor die heiße Lötstelle 8 in verschiedenen Bereichen der Heizwendel 2 positonierbar ist und damit auch während des Betriebes des Infrarot-Strahlers die Temperatur einzelner Heizwendelbereiche erfaßt werden kann. Die Heizwendel 2 wird mittels der Anschlußleitung 9, 10 mit einer Quelle für elektrischen Strom verbunden.In the figure, an embodiment of an infrared emitter according to the invention is shown schematically. On a support tube 1, the electric heating coil 2 is wound and the support tube 1 is positioned by means of
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3925024 | 1989-07-28 | ||
DE3925024 | 1989-07-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0410151A1 true EP0410151A1 (en) | 1991-01-30 |
Family
ID=6386047
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90112108A Withdrawn EP0410151A1 (en) | 1989-07-28 | 1990-06-26 | Infrared radiator with electrical heating coil |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0410151A1 (en) |
JP (1) | JPH0367485A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009037788A1 (en) | 2009-08-18 | 2011-02-24 | Saint-Gobain Sekurit Deutschland Gmbh & Co. Kg | Infrared emitter for use in heating and thermal conversion of planar substrate, preferably glass substrate, comprise casing tube and heating source, which is installed on casing tube |
WO2011020728A1 (en) | 2009-08-18 | 2011-02-24 | Saint-Gobain Glass France | Infrared emitter |
CN101220958B (en) * | 2003-11-25 | 2011-06-01 | 株式会社国际电气半导体技术服务 | Combustion heater and exhaust gas combustion device |
CN102781126A (en) * | 2012-07-27 | 2012-11-14 | 樊荣 | Electric heating radiation tube |
CN111405694A (en) * | 2020-03-31 | 2020-07-10 | 宝应县荣泰电子有限公司 | Heating rod for ceramic igniter and manufacturing process thereof |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1242291A (en) * | 1959-06-03 | 1960-09-23 | Heraeus Schott Quarzschmelze | Heat radiator |
GB2021369A (en) * | 1978-05-13 | 1979-11-28 | Stegmeier H | A heating cartridge |
US4531047A (en) * | 1982-07-28 | 1985-07-23 | Casso-Solar Corporation | Clip-mounted quartz tube electric heater |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59171487A (en) * | 1983-03-18 | 1984-09-27 | 松下電器産業株式会社 | Quartz tube heater |
-
1990
- 1990-06-26 EP EP90112108A patent/EP0410151A1/en not_active Withdrawn
- 1990-07-27 JP JP19808990A patent/JPH0367485A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1242291A (en) * | 1959-06-03 | 1960-09-23 | Heraeus Schott Quarzschmelze | Heat radiator |
GB2021369A (en) * | 1978-05-13 | 1979-11-28 | Stegmeier H | A heating cartridge |
US4531047A (en) * | 1982-07-28 | 1985-07-23 | Casso-Solar Corporation | Clip-mounted quartz tube electric heater |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101220958B (en) * | 2003-11-25 | 2011-06-01 | 株式会社国际电气半导体技术服务 | Combustion heater and exhaust gas combustion device |
DE102009037788A1 (en) | 2009-08-18 | 2011-02-24 | Saint-Gobain Sekurit Deutschland Gmbh & Co. Kg | Infrared emitter for use in heating and thermal conversion of planar substrate, preferably glass substrate, comprise casing tube and heating source, which is installed on casing tube |
WO2011020728A1 (en) | 2009-08-18 | 2011-02-24 | Saint-Gobain Glass France | Infrared emitter |
CN102781126A (en) * | 2012-07-27 | 2012-11-14 | 樊荣 | Electric heating radiation tube |
CN111405694A (en) * | 2020-03-31 | 2020-07-10 | 宝应县荣泰电子有限公司 | Heating rod for ceramic igniter and manufacturing process thereof |
CN111405694B (en) * | 2020-03-31 | 2022-02-15 | 宝应县荣泰电子有限公司 | Heating rod for ceramic igniter and manufacturing process thereof |
Also Published As
Publication number | Publication date |
---|---|
JPH0367485A (en) | 1991-03-22 |
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