EP0410151A1 - Infrared radiator with electrical heating coil - Google Patents

Infrared radiator with electrical heating coil Download PDF

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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
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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Withdrawn
Application number
EP90112108A
Other languages
German (de)
French (fr)
Inventor
Walter Dieudonné
Kurt Reul
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 Quarzglas GmbH and Co KG
Original Assignee
Heraeus Quarzglas GmbH and Co KG
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 Quarzglas GmbH and Co KG filed Critical Heraeus Quarzglas GmbH and Co KG
Publication of EP0410151A1 publication Critical patent/EP0410151A1/en
Withdrawn legal-status Critical Current

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    • 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.

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  • Resistance Heating (AREA)

Abstract

An infrared radiator with an electrical heating coil arranged inside a sleeve tube and with a temperature sensor is described. The heating coil is wound on a supporting tube which consists of material containing silicon dioxide and inside which the temperature sensor is arranged. The sleeve tube advantageously consists of quartz glass, vitreous fused silica or high-silica glass. <IMAGE>

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 spacers 3 within the cladding tube 4 made of quartz glass. The two cladding tube ends are closed with ceramic plugs 5 and 6. As can be seen, the support tube 1 is guided at one end of the cladding tube through the wall thereof. 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 Heizwendelbereiche can be detected. The heating coil 2 is connected by means of the connecting line 9, 10 with a source of electrical power.

Claims (6)

1. Infrarot-Strahler mit innerhalb eines Hüllrohres angeordneter elektrischer Heizwendel und einem Temperatursensor, dadurch gekennzeichnet, daß die Heizwendel (2) auf ein Trägerohr (1) aus Siliziumdioxid-haltigem Werkstoff aufgewickelt ist, das mit Spiel innerhalb eines Hüllrohres (4) angeordnet ist, und daß innerhalb des Trägerohres (1) der Temperatursensor (7, 8) angeordnet ist.1. Infrared emitter with disposed within a cladding tube electric heating coil and a temperature sensor, characterized in that the heating coil (2) is wound on a support tube (1) made of silica-containing material, which is arranged with play within a cladding tube (4) , and that within the carrier ear (1) of the temperature sensor (7, 8) is arranged. 2. Infrarot-Strahler nach Anspruch 1, dadurch gekennzeichnet, daß das Träger­rohr durch die Wand des Hüllrohres hindurchtritt.2. Infrared radiator according to claim 1, characterized in that the carrier tube passes through the wall of the cladding tube. 3. Infrarot-Strahler nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß der Temperatursensor innerhalb des Trägerrohres verschiebbar angeord­net ist.3. Infrared radiator according to claims 1 or 2, characterized in that the temperature sensor is slidably disposed within the support tube. 4. Infrarot-Strahler nach einem der Ansprüche 1 bis 3, dadurch gekennzeich­net, daß der Temperatursensor ein Thermoelement ist.4. Infrared radiator according to one of claims 1 to 3, characterized in that the temperature sensor is a thermocouple. 5. Infrarot-Strahler nach einem der Ansprüche 1 bis 3, dadurch gekennzeich­net, daß das Trägerrohr ein Kapillarrohr ist mit einem Innendurchmesser im Bereich von 0,5 bis 2 mm.5. Infrared radiator according to one of claims 1 to 3, characterized in that the support tube is a capillary tube with an inner diameter in the range of 0.5 to 2 mm. 6. Infrarot-Strahler nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Hüllrohr (4) aus Quarzgut, Quarzglas oder hoch­silikatischem Glas besteht.6. Infrared emitter according to one or more of claims 1 to 5, characterized in that the cladding tube (4) consists of fused silica, quartz glass or highly silicate glass.
EP90112108A 1989-07-28 1990-06-26 Infrared radiator with electrical heating coil Withdrawn EP0410151A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3925024 1989-07-28
DE3925024 1989-07-28

Publications (1)

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EP0410151A1 true EP0410151A1 (en) 1991-01-30

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ID=6386047

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EP90112108A Withdrawn EP0410151A1 (en) 1989-07-28 1990-06-26 Infrared radiator with electrical heating coil

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EP (1) EP0410151A1 (en)
JP (1) JPH0367485A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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