EP1283659B1 - Infrared radiator with twin cable sheath - Google Patents

Infrared radiator with twin cable sheath Download PDF

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Publication number
EP1283659B1
EP1283659B1 EP02016464.6A EP02016464A EP1283659B1 EP 1283659 B1 EP1283659 B1 EP 1283659B1 EP 02016464 A EP02016464 A EP 02016464A EP 1283659 B1 EP1283659 B1 EP 1283659B1
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EP
European Patent Office
Prior art keywords
twin
cladding tube
emitter according
carbon
tube
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EP02016464.6A
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German (de)
French (fr)
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EP1283659A2 (en
EP1283659A3 (en
Inventor
Friedhelm Schneider
Werner Kreuter
Jürgen Schaack
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Heraeus Noblelight GmbH
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Heraeus Noblelight GmbH
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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
    • H05B3/10—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • H05B3/14—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
    • H05B3/145—Carbon only, e.g. carbon black, graphite
    • 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 having a twin end tube having two ends and two tube channels, and at least one elongated IR radiator element made of carbon ribbon located at a distance from the inner surface of the cladding tube, each having a contact region for an electrical connection at two opposite ends , Metallic connecting conductor, of which at least one connecting conductor is guided over a pinch of the cladding tube by means of enclosed molybdenum foil to an external terminal contact, and wherein at least one connecting conductor is designed as a tension spring.
  • the invention further relates to an infrared emitter having a twin-cladding tube having two ends and two tube channels, elongate IR emitter elements made of carbon ribbon being disposed in the tube channels at a distance from the inner surface of the cladding tube, the carbon ribbon being at its two mutually opposite ends each having a contact region for an electrical, metallic connecting conductor, of which at least one connecting conductor is guided over a pinch of the cladding tube by means of enclosed molybdenum foil to an external terminal contact, and wherein at least one connecting conductor is designed as a tension spring.
  • Such infrared emitters are from the DE 44 38 870 A1 known.
  • the quartz glass tubes shown here have slot-shaped tube channels, wherein the quartz glass tube can be simultaneously flattened on its outer diameter.
  • tension springs spiral structures are used.
  • the infrared emitters have connection contacts at their two ends.
  • a short-wave infrared surface radiator which has a plurality of infrared radiator elements, which are each surrounded by a cladding tube, which vacuum-tight encloses a heating coil.
  • the infrared radiator elements are connected for the purpose of connection with a molybdenum foil, which is melted in the cladding tube and the connection side is led out by means of a contact pin from the cladding tube for electrical connection to the outside;
  • a plurality of interconnected infrared radiators are adjacent to form a common Abstrahlebene and arranged parallel to each other, wherein the connection-side End of the ducts is angled in each case with respect to the Abstrahlebene.
  • the cladding tubes are each angled in the area of the pinch around an angle in the range between 46 and 135 °.
  • an infrared radiator which has a surface trained radiation source in the form of a carbon band, wherein the ends of the band are at least partially provided with a metallic contact layer, attack on the connecting elements.
  • an infrared radiator with a carbon band which consists of a plurality of mutually parallel and in the form of a band arranged graphite fibers, which is disposed within a closed on both sides of quartz glass tube.
  • the carbon band is provided on both sides with metallic end caps.
  • a problem with carbon fiber radiators is that the flexibility in the choice of electrical voltage is limited because it is only an elongated carbon fiber ribbon; Thus, the electrical power is not adjustable.
  • Object of the invention is to use using the known twin pipe technology carbon radiator in different arrangements in twin tubes, with a higher flexibility in the electrical voltage selection and / or the installation options should be achieved.
  • the object is achieved for the first infrared radiator according to the invention in that the twin cladding tube has connection contacts only at one of its two ends.
  • a carbon band is arranged in the two pipe channels. It may be advantageous if at least one carbon band extends only over part of the length of the tube channels.
  • the object is achieved for the second infrared emitter according to the invention in that at least one carbon band extends only over part of the length of the tube channels.
  • Carbon radiators have a high thermal speed compared to Metallbindleitern, so that they are equate short-wave radiation in their heating and cooling behavior.
  • An advantage of the infrared radiator according to the invention is the fact that higher surface outputs are possible due to the compact geometry of the twin tubes, twin tubes are also mechanically stable than individual round tubes and thus in practice - for example in the paint drying - ensure high reliability.
  • a filling gas is used in the interior of the twin cladding tube, which has noble gas.
  • argon with a cold filling pressure in the range from 500 to 900 mbar is used as the filling gas for the tube channels for the infrared emitters according to the invention.
  • the tube channels have an at least approximately elliptical cross section. It is advantageous if the main axis of the ellipse of the cross section runs parallel to the surface of the carbon band.
  • the tube channels have an at least approximately circular cross-section. In such a case, it is advantageous if the center of the circular cross section is in the region of the carbon band.
  • twin tube technology allows a different arrangement of twin tubes, so that on the one hand it is possible to vary the electrical connection voltage by the length of the carbon ribbon; Furthermore, it is advantageously possible to realize now carbon emitters with a total length of up to 3m.
  • the infrared emitter comprises two tubes 1 ', 1 ", which are mechanically fixedly connected to one another by melting, as a twin sheath tube 1 made of quartz glass, which has at each end one passage of current, each with a sealing region or pinch region 4, per tube 1', 1" through which a molybdenum foil 3 is passed in each case.
  • the molybdenum foil 3 closes off the argon-filled interior gas-tight from the outside atmosphere.
  • first tube 1 Inside the first tube 1 'is a carbon band 2, whose ends are each connected to a contact region 6 for connection to metallic conductors; At one end of the carbon strip 2, an electrically conductive spring element 7 for the compensation of thermal elongations electrically and mechanically firmly connected, wherein the spring element 7 is provided with a connecting conductor, which leads to the inwardly directed contact with the molybdenum foil 3.
  • the other end of the carbon strip 2 is led via a conductor designed as a current bridge 9 to an electrical line 10 into the adjacent tube 1 ", in which the line 10 is provided with a spring element 7 for compensation of the thermal elongation, so that there are no expansion problems in the passage of current
  • the line 10 is connected in the squish area 4 with the inwardly directed end of the molybdenum foil 3, so that the circuit for the carbon band 2 can be closed via the respective outer terminals 5 ', 5 ".
  • FIG. 2a shows in longitudinal section a twin sheath 1, which has in each tube 1 ', 1 "a carbon band 2', 2" almost over the full length of the interior, which contains at the respective ends contacting regions 6, with connection lines or spring elements 7 and a current bridge 11 are connected.
  • the lines located in the interior are formed between the contacts of the bands 6 and the respective molybdenum foils 3 as spring elements 7 for compensating the thermal elongation of the respective carbon strips 2 ', 2 ".
  • FIG. 2b shows a cross section along a surface which in FIG. 2a is shown schematically as line AA.
  • the two tubes 1 ', 1 are formed into a single, mechanically firmly interconnected double or twin sheath 1 with tube channels 12', 12", the outer circumference of which results from the twin tube configuration 1 ', 1 ", so that the Tubes 1 ', 1 "are now combined to form a total radiator.
  • An essential feature for increasing the mechanical stability, in particular under high thermal load, can be seen in the central web 12.
  • FIG. 3 shows a twin sheath 1 with outer terminals 5, 5 ", 5 III , 5 IV , in whose two tubes 1 ', 1" are each only partially tensioned spring 7 stretched carbon bands 2', 2 "are provided, which along
  • the configuration is particularly favorable for realizing long radiator lengths, for example in the range of 3 to 6 m in length, by overlapping shorter carbon bands can be produced in adjacent pipe channels of the twin cladding tube.

Description

Die Erfindung betrifft einen Infrarot-Strahler mit einem zwei Enden und zwei Rohrkanäle aufweisenden Zwillings-Hüllrohr und wenigstens einem sich darin im Abstand zur Innenfläche des Hüllrohres befindlichen langgestreckten IR-Strahlerelement aus Carbonband, das an zwei sich gegenüber liegenden Enden jeweils einen Kontaktbereich für einen elektrischen, metallischen Anschlussleiter aufweist, von denen wenigstens ein Anschlussleiter über eine Quetschung des Hüllrohres mittels eingeschlossener Molybdänfolie zu einem außen liegenden Anschlusskontakt geführt ist, und wobei wenigstens ein Anschlussleiter als Zugfeder ausgebildet ist.
Die Erfindung betrifft weiterhin einen Infrarot-Strahler mit einem zwei Enden und zwei Rohrkanäle aufweisenden Zwillings-Hüllrohr, wobei in den Rohrkanälen jeweils im Abstand zur Innenfläche des Hüllrohres langgestreckte IR-Strahlerelemente aus Carbonband angeordnet sind, wobei das Carbonband an seinen zwei sich gegenüber liegenden Enden jeweils einen Kontaktbereich für einen elektrischen, metallischen Anschlussleiter aufweist, von denen wenigstens ein Anschlussleiter über eine Quetschung des Hüllrohres mittels eingeschlossener Molybdänfolie zu einem außen liegenden Anschlusskontakt geführt ist, und wobei wenigstens ein Anschlussleiter als Zugfeder ausgebildet ist.The invention relates to an infrared radiator having a twin end tube having two ends and two tube channels, and at least one elongated IR radiator element made of carbon ribbon located at a distance from the inner surface of the cladding tube, each having a contact region for an electrical connection at two opposite ends , Metallic connecting conductor, of which at least one connecting conductor is guided over a pinch of the cladding tube by means of enclosed molybdenum foil to an external terminal contact, and wherein at least one connecting conductor is designed as a tension spring.
The invention further relates to an infrared emitter having a twin-cladding tube having two ends and two tube channels, elongate IR emitter elements made of carbon ribbon being disposed in the tube channels at a distance from the inner surface of the cladding tube, the carbon ribbon being at its two mutually opposite ends each having a contact region for an electrical, metallic connecting conductor, of which at least one connecting conductor is guided over a pinch of the cladding tube by means of enclosed molybdenum foil to an external terminal contact, and wherein at least one connecting conductor is designed as a tension spring.

Derartige Infrarot-Strahler sind aus der DE 44 38 870 A1 bekannt. Die hier dargestellten Quarzglasrohre weisen schlitzförmige Rohrkanäle auf, wobei das Quarzglasrohr an seinem Außendurchmesser gleichzeitig flachgedrückt sein kann. Als Zugfedern werden spiralförmige Strukturen eingesetzt. Die Infrarot-Strahler weisen an ihren beiden Enden Anschlusskontakte auf.Such infrared emitters are from the DE 44 38 870 A1 known. The quartz glass tubes shown here have slot-shaped tube channels, wherein the quartz glass tube can be simultaneously flattened on its outer diameter. As tension springs spiral structures are used. The infrared emitters have connection contacts at their two ends.

Aus der EP 0 959 645 A2 ist ein kurzwelliger Infrarotflächenstrahler bekannt, der mehrere Infrarotstrahlerelemente aufweist, die jeweils von einem Hüllrohr umgeben sind, welches vakuumdicht eine Heizwendel umschließt. Die Infrarotstrahlerelemente sind zwecks Anschluss mit einer Molybdänfolie verbunden, die im Hüllrohr eingeschmolzen ist und anschlussseitig mittels eines Kontaktstiftes aus dem Hüllrohr zur elektrischen Verbindung nach außen herausgeführt ist; dabei sind mehrere miteinander verbundene Infrarotstrahler unter Bildung einer gemeinsamen Abstrahlebene benachbart und parallel zueinander angeordnet, wobei das anschlussseitige Ende der Hüllrohre jeweils in Bezug auf die Abstrahlebene abgewinkelt ist. In einer bevorzugten Ausgestaltung sind die Hüllrohre jeweils im Bereich der Quetschung um einen Winkel im Bereich zwischen 46 und 135° abgewinkelt.From the EP 0 959 645 A2 a short-wave infrared surface radiator is known, which has a plurality of infrared radiator elements, which are each surrounded by a cladding tube, which vacuum-tight encloses a heating coil. The infrared radiator elements are connected for the purpose of connection with a molybdenum foil, which is melted in the cladding tube and the connection side is led out by means of a contact pin from the cladding tube for electrical connection to the outside; In this case, a plurality of interconnected infrared radiators are adjacent to form a common Abstrahlebene and arranged parallel to each other, wherein the connection-side End of the ducts is angled in each case with respect to the Abstrahlebene. In a preferred embodiment, the cladding tubes are each angled in the area of the pinch around an angle in the range between 46 and 135 °.

Weiterhin ist aus der DE 195 45 296 C2 ein Infrarotstrahler bekannt, welcher eine flächenhaft ausgebildete Strahlungsquelle in Form eines Carbonbandes aufweist, wobei die Enden des Bandes mindestens teilweise mit einer metallischen Kontaktschicht versehen sind, an der Anschlusselemente angreifen.Furthermore, from the DE 195 45 296 C2 an infrared radiator is known, which has a surface trained radiation source in the form of a carbon band, wherein the ends of the band are at least partially provided with a metallic contact layer, attack on the connecting elements.

Aus der GB-A 22 33 150 ist ein Infrarotstrahler mit einem Carbonband bekannt, das aus einer Vielzahl parallel zueinander und in Form eines Bandes angeordnete Graphitfasern besteht, welches innerhalb eines beidseitig verschlossenen Quarzglasrohres angeordnet ist. Für den elektrischen Anschluss ist das Carbonband beidseitig mit metallischen Endkappen versehen.From the GB-A 22 33 150 an infrared radiator with a carbon band is known, which consists of a plurality of mutually parallel and in the form of a band arranged graphite fibers, which is disposed within a closed on both sides of quartz glass tube. For the electrical connection, the carbon band is provided on both sides with metallic end caps.

Als problematisch erweist sich bei Carbonstrahlern, dass die Flexibilität bei der Wahl der elektrischen Spannung eingeschränkt ist, da es sich lediglich um ein langgestrecktes Kohlefaserband handelt; somit ist auch die elektrische Leistung nicht beliebig einstellbar.A problem with carbon fiber radiators is that the flexibility in the choice of electrical voltage is limited because it is only an elongated carbon fiber ribbon; Thus, the electrical power is not adjustable.

Aufgabe der Erfindung ist es, unter Nutzung der bekannten Zwillingsrohrtechnologie Carbonstrahler in unterschiedlicher Anordnung in Zwillingsrohren einzusetzen, wobei eine höhere Flexibilität bei der elektrischen Spannungswahl und/oder den Einbaumöglichkeiten erzielt werden soll.Object of the invention is to use using the known twin pipe technology carbon radiator in different arrangements in twin tubes, with a higher flexibility in the electrical voltage selection and / or the installation options should be achieved.

Die Aufgabe wird für den ersten erfindungsgemäßen Infrarot-Strahler dadurch gelöst, dass das Zwillings-Hüllrohr lediglich an einem seiner beiden Enden Anschlusskontakte aufweist.The object is achieved for the first infrared radiator according to the invention in that the twin cladding tube has connection contacts only at one of its two ends.

Es hat sich hier bewährt, wenn in einem der zwei Rohrkanäle ein Carbonband angeordnet ist und wenn in dem anderen der zwei Rohrkanäle ein mit der Zugfeder gespannter Stromzuleiter angeordnet ist.It has proven itself here, if in one of the two pipe channels, a carbon band is arranged and if in the other of the two pipe channels a tensioned with the tension spring Stromzuleiter is arranged.

Weiterhin hat es sich bewährt, wenn in den zwei Rohrkanälen jeweils ein Carbonband angeordnet ist. Dabei kann es vorteilhaft sein, wenn sich wenigstens ein Carbonband sich nur über einen Teil der Länge der Rohrkanäle erstreckt.Furthermore, it has proven useful if in each case a carbon band is arranged in the two pipe channels. It may be advantageous if at least one carbon band extends only over part of the length of the tube channels.

Die Aufgabe wird für den zweiten erfindungsgemäßen Infrarot-Strahler dadurch gelöst, dass wenigstens ein Carbonband sich nur über einen Teil der Länge des Rohrkanäle erstreckt.The object is achieved for the second infrared emitter according to the invention in that at least one carbon band extends only over part of the length of the tube channels.

Carbonstrahler weisen gegenüber Metallheizleitern eine hohe thermische Schnelligkeit auf, so dass sie in ihrem Aufheiz- und Abkühlverhalten kurzwelligen Strahlen gleichzusetzen sind. Ein Vorteil des erfindungsgemäßen Infrarot-Strahlers ist darin zu sehen, dass durch die kompakte Geometrie der Zwillingsrohre höhere Flächenleistungen möglich sind, wobei Zwillingsrohre auch mechanisch stabiler sind als einzelne Rundrohre und somit in der Praxis - beispielsweise in der Lacktrocknung - eine hohe Betriebssicherheit gewährleisten.Carbon radiators have a high thermal speed compared to Metallheizleitern, so that they are equate short-wave radiation in their heating and cooling behavior. An advantage of the infrared radiator according to the invention is the fact that higher surface outputs are possible due to the compact geometry of the twin tubes, twin tubes are also mechanically stable than individual round tubes and thus in practice - for example in the paint drying - ensure high reliability.

In einer vorteilhaften Ausgestaltung des Strahlers ist ein Füllgas im Inneren des Zwillings-Hüllrohrs eingesetzt, welches Edelgas aufweist. Vorzugsweise wird für die erfindungsgemäßen Infrarot-Strahler als Füllgas für die Rohrkanäle Argon mit einem Kaltfülldruck im Bereich von 500 bis 900 mbar eingesetzt.In an advantageous embodiment of the radiator, a filling gas is used in the interior of the twin cladding tube, which has noble gas. Preferably, argon with a cold filling pressure in the range from 500 to 900 mbar is used as the filling gas for the tube channels for the infrared emitters according to the invention.

Vorteilhafterweise weisen die Rohrkanäle einen wenigstens annähernd elliptischen Querschnitt auf. Dabei ist es von Vorteil, wenn die Hauptachse der Ellipse des Querschnitts parallel zur Oberfläche des Carbonbandes verläuft.Advantageously, the tube channels have an at least approximately elliptical cross section. It is advantageous if the main axis of the ellipse of the cross section runs parallel to the surface of the carbon band.

Weiterhin ist es möglich, dass die Rohrkanäle einen wenigstens annähernd kreisförmigen Querschnitt aufweisen. In einem solchen Fall ist es von Vorteil, wenn der Mittelpunkt des kreisförmigen Querschnitts im Bereich des Carbonbandes liegt.Furthermore, it is possible that the tube channels have an at least approximately circular cross-section. In such a case, it is advantageous if the center of the circular cross section is in the region of the carbon band.

Darüber hinaus ermöglicht die erfindungsgemäße Nutzung der Zwillingsrohrtechnologie eine unterschiedliche Anordnung von Zwillingsrohren, so dass es einerseits möglich ist, die elektrische Anschlussspannung durch die Länge des Carbonbandes zu variieren; weiterhin ist es vorteilhafterweise möglich, nunmehr Carbonstrahler mit einer Gesamtlänge von bis zu 3m zu realisieren.In addition, the inventive use of the twin tube technology allows a different arrangement of twin tubes, so that on the one hand it is possible to vary the electrical connection voltage by the length of the carbon ribbon; Furthermore, it is advantageously possible to realize now carbon emitters with a total length of up to 3m.

Darüber hinaus wird durch den elliptischen bzw. kreisförmigen Querschnitt der Innenräume eine gute thermische Isolation der Carbonstrahler erzielt.In addition, a good thermal insulation of the carbon radiator is achieved by the elliptical or circular cross section of the interiors.

Im folgenden ist der Gegenstand der Erfindung anhand der Figuren 1, 2a, 2b und 3 näher erläutert.

  • Figur 1 zeigt im Längsschnitt ein Zwillingshüllrohr aus Quarzglas mit einseitigem Stromanschluss, bei dem ein Rohr ein Carbon-Band als IR-Strahler mit Zugfeder aufweist, während das benachbarte Zwillingsrohr nur einen mit Zugfeder gespannten Stromzuleiter enthält.
  • Figur 2a zeigt einen Zwillingsrohrstrahler mit einseitigem Stromanschluss und einem Carbonstrahler in jedem der beiden Zwillingsrohre.
  • Figur 2b zeigt einen Querschnitt entlang der durch Linie A-A in Figur 2a angedeuteten Querschnittsfläche.
  • Figur 3 zeigt einen Zwillingsrohrstrahler mit jeweils einem geteilten Carbonband pro Zwillingsrohr.
The following is the subject of the invention with reference to the FIGS. 1, 2a . 2 B and 3 explained in more detail.
  • FIG. 1 shows in longitudinal section a twin cladding tube made of quartz glass with one-sided power connection, in which a tube has a carbon band as IR radiator with tension spring, while the adjacent twin tube contains only one tensioned with tension spring Stromzuleiter.
  • FIG. 2a shows a twin tube heater with single-sided power connection and a carbon emitter in each of the two twin tubes.
  • FIG. 2b shows a cross section along through the line AA in FIG. 2a indicated cross-sectional area.
  • FIG. 3 shows a twin tube radiator, each with a split carbon band per twin tube.

Gemäß Figur 1 weist der Infrarot-Strahler zwei durch Schmelzen miteinander mechanisch fest verbundene Rohre 1', 1" als Zwillings-Hüllrohr 1 aus Quarzglas auf, das an einem Ende jeweils pro Rohr 1', 1" einen Stromdurchgang mit je einem Dichtungsbereich bzw. Quetschungsbereich 4 aufweist, durch den eine Molybdänfolie 3 jeweils hindurchgeführt ist. Die Molybdänfolie 3 schließt den mit Argon gefüllten Innenraum gegenüber der äußeren Atmosphäre gasdicht ab. Im Inneren des ersten Rohres 1' befindet sich ein Carbonband 2, dessen Enden jeweils mit einem Kontaktbereich 6 für den Anschluss an metallische Leiter verbunden sind; an ein Ende des Carbonbandes 2 ist ein elektrisch leitendes Federelement 7 zur Kompensation von thermischen Längendehnungen elektrisch und mechanisch fest angeschlossen, wobei das Federelement 7 mit einem Anschlussleiter versehen ist, der zu dem nach innen gerichteten Kontakt mit der Molybdänfolie 3 führt. Das andere Ende des Carbonbandes 2 ist über einen als Strombrücke 9 ausgebildeten Leiter zu einer elektrischen Leitung 10 in das benachbarte Rohr 1" geführt. Darin ist die Leitung 10 mit einem Federelement 7 zur Kompensation der thermischen Längendehnung vorgesehen, so dass bei Stromdurchtritt keinerlei Dehnungsprobleme in der Leitung auftreten können. Die Leitung 10 ist im Quetschbereich 4 mit dem nach innen gerichteten Ende der Molybdänfolie 3 verbunden, so dass der Stromkreis für das Carbonband 2 über die jeweiligen äußeren Anschlüsse 5', 5" geschlossen werden kann. Es handelt sich somit um einen Strahler mit Zwillings-Hüllrohr 1, der einen einseitigen elektrischen Anschluss und eine einkanalige Beheizung aufweist; als vorteilhaft erweist sich die hohe mechanische Stabilität im Betriebszustand aufgrund der Zwillingsrohrkonstruktion mit einem Mittelsteg ( siehe Fig. 2b).According to FIG. 1 2, the infrared emitter comprises two tubes 1 ', 1 ", which are mechanically fixedly connected to one another by melting, as a twin sheath tube 1 made of quartz glass, which has at each end one passage of current, each with a sealing region or pinch region 4, per tube 1', 1" through which a molybdenum foil 3 is passed in each case. The molybdenum foil 3 closes off the argon-filled interior gas-tight from the outside atmosphere. Inside the first tube 1 'is a carbon band 2, whose ends are each connected to a contact region 6 for connection to metallic conductors; At one end of the carbon strip 2, an electrically conductive spring element 7 for the compensation of thermal elongations electrically and mechanically firmly connected, wherein the spring element 7 is provided with a connecting conductor, which leads to the inwardly directed contact with the molybdenum foil 3. The other end of the carbon strip 2 is led via a conductor designed as a current bridge 9 to an electrical line 10 into the adjacent tube 1 ", in which the line 10 is provided with a spring element 7 for compensation of the thermal elongation, so that there are no expansion problems in the passage of current The line 10 is connected in the squish area 4 with the inwardly directed end of the molybdenum foil 3, so that the circuit for the carbon band 2 can be closed via the respective outer terminals 5 ', 5 ". It is thus a radiator with twin sheath 1, which has a one-sided electrical connection and a one-channel heating; the high mechanical stability in the operating state proves to be advantageous due to the twin tube construction with a central web (see Fig. 2b ).

Figur 2a zeigt im Längsschnitt ein Zwillings-Hüllrohr 1, die in jedem Rohr 1', 1" ein Carbonband 2', 2" nahezu über die volle Länge des Innenraumes aufweist, welches an den jeweiligen Enden befindliche Kontaktierungsbereiche 6 enthält, die mit Anschlussleitungen bzw. Federelementen 7 und einer Strombrücke 11 verbunden sind. Die im Inneren befindlichen Leitungen sind zwischen den Kontaktierungen der Bänder 6 und den jeweiligen Molybdänfolien 3 als Federelemente 7 zur Kompensation der thermischen Längendehnung der jeweiligen Carbonbänder 2', 2" ausgebildet. FIG. 2a shows in longitudinal section a twin sheath 1, which has in each tube 1 ', 1 "a carbon band 2', 2" almost over the full length of the interior, which contains at the respective ends contacting regions 6, with connection lines or spring elements 7 and a current bridge 11 are connected. The lines located in the interior are formed between the contacts of the bands 6 and the respective molybdenum foils 3 as spring elements 7 for compensating the thermal elongation of the respective carbon strips 2 ', 2 ".

Figur 2b zeigt einen Querschnitt entlang einer Fläche, welche in Figur 2a schematisch als Linie AA dargestellt ist. Die beiden Rohre 1', 1" sind zu einem einzigen, mechanisch fest miteinander verbundenen Doppel- oder Zwillings-Hüllrohr 1 mit Rohrkanälen 12', 12"ausgebildet, dessen äußerer Umfang sich aus der Zwillingsrohrkonfiguration 1', 1" ergibt, so dass die Rohre 1', 1" nunmehr zu einem Gesamtstrahler zusammengefasst sind. Ein wesentliches Merkmal zur Erhöhung der mechanischen Stabilität, insbesondere bei hoher thermischer Belastung, ist im Mittelsteg 12 zu sehen. Aufgrund der Vorspannung durch Federelemente 7 ( siehe oben ) wird einerseits eine hohe Stabilität der IR-Strahleranordnung erzielt, während andererseits ein ausreichender Abstand zwischen Carbonstrahlerband 2', 2" und dem Zwillings-Hüllrohr 1 besteht, so dass aufgrund thermischer Isolation eine rasche thermische Reaktion der Carbonbänder 2', 2" möglich ist. Es handelt sich somit um einen Infrarot-Strahler mit einseitigem Anschluss und zweikanaliger Beheizung. FIG. 2b shows a cross section along a surface which in FIG. 2a is shown schematically as line AA. The two tubes 1 ', 1 "are formed into a single, mechanically firmly interconnected double or twin sheath 1 with tube channels 12', 12", the outer circumference of which results from the twin tube configuration 1 ', 1 ", so that the Tubes 1 ', 1 "are now combined to form a total radiator. An essential feature for increasing the mechanical stability, in particular under high thermal load, can be seen in the central web 12. Due to the bias of spring elements 7 (see above), on the one hand, a high stability of the IR radiator arrangement is achieved, while on the other hand there is a sufficient distance between the carbon radiator belt 2 ', 2 "and the twin sheath 1, so that due to thermal insulation, a rapid thermal reaction Carbon bands 2 ', 2 "is possible. It is thus an infrared emitter with one-sided connection and two-channel heating.

Figur 3 zeigt ein Zwillings-Hüllrohr 1 mit äußeren Anschlüssen 5, 5", 5III, 5IV, in dessen beiden Rohren 1', 1" jeweils nur zum Teil mittels Zugfeder 7 gespannte Carbonbänder 2', 2" vorgesehen sind, wobei diese sich entlang der jeweiligen Längsachse gesehen gegenseitig so ergänzen, dass eine Abstrahlung von Infrarot über die gesamte Strahlerlänge erfolgt. Diese Konfiguration erweist sich als besonders günstig, um große Strahlerlängen - beispielsweise im Bereich von 3 bis 6 m Länge - zu realisieren, die durch Überlappen aus kürzeren Carbonbändern in nebeneinander liegenden Rohrkanälen des Zwillings-Hüllrohrs herstellbar sind. FIG. 3 shows a twin sheath 1 with outer terminals 5, 5 ", 5 III , 5 IV , in whose two tubes 1 ', 1" are each only partially tensioned spring 7 stretched carbon bands 2', 2 "are provided, which along The configuration is particularly favorable for realizing long radiator lengths, for example in the range of 3 to 6 m in length, by overlapping shorter carbon bands can be produced in adjacent pipe channels of the twin cladding tube.

Claims (10)

  1. Infrared emitter having a twin cladding tube and, situated in it, at least one elongated IR emitter element, which comprises, on two opposite ends, one contact region each for an electrical connecting conductor of which at least one connecting conductor is guided via a crimping of the cladding tube by means of an enclosed molybdenum foil to a connecting contact that is situated outside,
    whereby at least one carbon band (2, 2', 2") is arranged, as IR emitter element, at a distance to the internal surface of the cladding tube (1, 1', 1"), whereby the carbon band comprises, on its ends, one contact region (6) each for connection to metallic conductors, and whereby at least one metallic conductor is provided as tension spring (7), characterised in that at least one carbon band (2, 2', 2") extends just over a part of the length of the interior of the cladding tubes (1, 1', 1").
  2. Emitter according to claim 1 having a twin cladding tube and, situated in it, at least one elongated IR emitter element, which comprises, on two opposite ends, one contact region each for an electrical connecting conductor of which at least one connecting conductor is guided via a crimping of the cladding tube by means of an enclosed molybdenum foil to a connecting contact that is situated outside,
    whereby at least one carbon band (2, 2', 2") is arranged, as IR emitter element, at a distance to the internal surface of the cladding tube (1, 1', 1"), whereby the carbon band comprises, on its ends, one contact region (6) each for connection to metallic conductors, and whereby at least one metallic conductor is provided as tension spring (7), characterised in that the twin cladding tube (1) comprises connecting contacts (5', 5") on just one of its two ends.
  3. Emitter according to claim 1 or 2, characterised in that a filling gas containing noble gas is used in the interior of the twin cladding tubes (1, 1', 1").
  4. Emitter according to any one of the claims 1 to 3, characterised in that Argon with a cold fill pressure in the range of 500 to 900 mbar is used as filling gas.
  5. Infrared emitter according to any one of the claims 1 to 4, characterised in that the interior of the cladding tube (1, 1', 1") has an at least approximately elliptical cross-section.
  6. Infrared emitter according to claim 5, characterised in that the main axis of the ellipsis of the cross-section runs parallel to the surface of the carbon band (2, 2' 2").
  7. Infrared emitter according to any one of the claims 1 to 4, characterised in that the interior of the cladding tube (1, 1', 1") has an at least approximately circular cross-section.
  8. Infrared emitter according to claim 7, characterised in that the centre of the circular cross-section is situated in the region of the carbon band (2, 2', 2").
  9. Emitter according to any one of the claims 1 to 8, characterised in that a filling gas containing noble gas is used in the interior of the twin cladding tubes (1, 1' 1").
  10. Emitter according to any one of the claims 1 to 9, characterised in that Argon with a cold fill pressure in the range of 500 to 900 mbar is used as filling gas.
EP02016464.6A 2001-08-07 2002-07-23 Infrared radiator with twin cable sheath Expired - Lifetime EP1283659B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10137928A DE10137928A1 (en) 2001-08-07 2001-08-07 Infrared heater with a twin cladding tube
DE10137928 2001-08-07

Publications (3)

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EP1283659A2 EP1283659A2 (en) 2003-02-12
EP1283659A3 EP1283659A3 (en) 2004-12-15
EP1283659B1 true EP1283659B1 (en) 2016-04-20

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EP02016464.6A Expired - Lifetime EP1283659B1 (en) 2001-08-07 2002-07-23 Infrared radiator with twin cable sheath

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US (1) US20030031471A1 (en)
EP (1) EP1283659B1 (en)
JP (1) JP2003142239A (en)
DE (1) DE10137928A1 (en)

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EP1349429A3 (en) * 2002-03-25 2007-10-24 Tokyo Electron Limited Carbon wire heating object sealing heater and fluid heating apparatus using the same heater
DE102007050289A1 (en) 2007-10-18 2009-04-23 Heraeus Noblelight Gmbh Carbon emitter with getter
US20130187066A1 (en) * 2010-10-11 2013-07-25 Osram Ag Infrared emitter
US8463113B2 (en) * 2010-12-20 2013-06-11 Gyu Eob HWANG Fan heater applying a carbon fiber ribbon secured in each heating cartridge
CN102625500B (en) * 2011-01-31 2015-06-10 乐金电子(天津)电器有限公司 End structure of carbon tube type roasting tube and microwave oven employing the same
US11202346B2 (en) 2011-03-25 2021-12-14 Sauna Works Inc. Electromagnetic wave reducing heaters and devices and saunas
US9844100B2 (en) 2011-03-25 2017-12-12 Raleigh C. Duncan Electromagnetic wave reducing heater
US10517794B2 (en) 2012-03-23 2019-12-31 Sauna Works Inc. Low EMF halogen tube heater
DE102015102665A1 (en) * 2015-02-25 2016-08-25 Heraeus Noblelight Gmbh Irradiation device for coupling infrared radiation in a vacuum process chamber with a single-ended infrared radiator
WO2018026960A1 (en) * 2016-08-02 2018-02-08 Sauna Works Inc. (Aka Far Infrared Sauna Technology Co.) Low emf halogen tube heater
EP3516680A1 (en) * 2016-09-22 2019-07-31 Heraeus Noblelight GmbH Infrared radiating element

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GB2233150A (en) * 1989-06-16 1991-01-02 Electricity Council Infra-red radiation source
DE4438870B4 (en) * 1994-11-03 2004-11-11 Heraeus Noblelight Gmbh Infrared emitter with an elongated resistance body as the radiation source
DE19545296C2 (en) * 1995-12-05 1998-08-27 Heraeus Noblelight Gmbh Infrared heater
DE19717270A1 (en) * 1997-04-24 1998-10-29 Zett Mess Technik Gmbh Height measuring and marking unit for 3D measuring and-or marking of workpieces
DE19822829A1 (en) * 1998-05-20 1999-11-25 Heraeus Noblelight Gmbh Short-wave infrared panel heater
CN1299539C (en) * 1999-11-30 2007-02-07 松下电器产业株式会社 Infrared lapm. heating device and method for producing infrared lamp

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DE10137928A1 (en) 2003-03-06
JP2003142239A (en) 2003-05-16
EP1283659A2 (en) 2003-02-12
US20030031471A1 (en) 2003-02-13
EP1283659A3 (en) 2004-12-15

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