EP0465766B1 - Infrarot-Flächenstrahler - Google Patents

Infrarot-Flächenstrahler Download PDF

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Publication number
EP0465766B1
EP0465766B1 EP91103910A EP91103910A EP0465766B1 EP 0465766 B1 EP0465766 B1 EP 0465766B1 EP 91103910 A EP91103910 A EP 91103910A EP 91103910 A EP91103910 A EP 91103910A EP 0465766 B1 EP0465766 B1 EP 0465766B1
Authority
EP
European Patent Office
Prior art keywords
housing
heating coils
interior
area
irradiator according
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.)
Expired - Lifetime
Application number
EP91103910A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0465766A1 (de
Inventor
Rainer Küchler
Norbert Mittelstädt
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
Priority to AT91103910T priority Critical patent/ATE85686T1/de
Publication of EP0465766A1 publication Critical patent/EP0465766A1/de
Application granted granted Critical
Publication of EP0465766B1 publication Critical patent/EP0465766B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • H05B3/26—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/04—Stoves or ranges heated by electric energy with heat radiated directly from the heating element
    • F24C7/043—Stoves
    • 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
    • H05B2203/014—Heaters using resistive wires or cables not provided for in H05B3/54
    • 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
    • H05B2203/017—Manufacturing methods or apparatus for heaters
    • 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 a surface radiator for short-wave infrared radiation with high radiation power per unit area, with a housing and with one or more heating coils with at least two power connections, the heating coils being arranged behind the radiation surface of the housing in its interior largely evenly, the Heating coils are guided and held in receiving bodies by means of spacers, the parts of the receiving bodies being transparent to the radiation surface for the infrared radiation, the heating coils being assigned a reflector on their side opposite the radiation surface and the housing having at least one supply and one discharge connection for a cooling medium that cools the radiator in the flow.
  • Such short-wave high-power infrared radiators are generally known. They are characterized by high energy concentration in a narrow space and a large penetration depth of radiation into the heating material and are used in a wide variety of industrial production processes.
  • the heating coils are enclosed within a quartz glass envelope tube filled with inert gas.
  • the power supply to the heating coil takes place via metallic contact plates, which are led out at the melted quartz glass tube ends. Due to the high currents and the differences in the thermal expansion coefficients of glass and contact wafers, these melts are particularly exposed to changes in temperature and limit the possible uses of the radiator in terms of power, temperature and service life.
  • several heating coils, including their quartz glass cladding tubes are positioned in a lamp housing in such a way that the heating material can be irradiated over a large area.
  • the entire available radiation energy is to be emitted in one direction only, such radiators are positioned in front of a reflector body. Due to its mechanical and chemical stability as well as its good reflective properties in the infrared, a thin gold layer is used as the reflector surface. However, the relatively poor thermal stability of the gold layer at temperatures above 800 ° C necessitates cooling of the reflector. Therefore, the reflector body or the entire lamp housing is designed so large and massive that an effective water and air cooling of the reflector is possible. Since the temperatures that can be achieved with the high-performance infrared radiators are far above the temperature range at which quartz glass softens, the quartz glass cladding tubes and in particular the sensitive melts at the tube ends must also be cooled.
  • the quartz glass cladding tubes are cooled in an air stream which is guided behind a quartz glass screen so that the heating material is not cooled by convection.
  • the use of such high-performance infrared emitters under extreme external pressure conditions, for example under vacuum, is not possible or is possible only to a limited extent due to their construction.
  • the object of the invention is to increase the economy and operational safety of high-performance infrared radiators, in particular with regard to the heat development and the associated cooling measures, by a simple and compact structure and to expand their range of use with regard to the tolerable temperature and external pressure conditions.
  • the object is achieved in that the interior of the housing, which is delimited on one side by the radiating surface, is closed and has the at least one supply connection and the at least one discharge connection in that the cooling medium is an inert gas, which is the interior flows through and around the heating coils and that the at least two power connections are led through at least one bushing in a vacuum-tight manner through the wall delimiting the interior.
  • the heating coils in the interior of the housing are flushed with inert gas in the flow, on the one hand they are very well protected against oxidation, on the other hand it is not necessary to arrange the heating coils in separate, gas-tight tubes which are melted at the ends.
  • the power connections for several heating coils can be combined and led out through the wall of the housing at a point with low temperature stress.
  • the flushing of the heating coils with inert gas is carried out in such a way that at the same time the receptacles for the heating coils, the reflector and the walls of the housing, which are subjected to high temperatures, are cooled, so that additional coolants, for example on the outside of the housing, and the associated connections and devices are not required.
  • the space requirement of the radiator and its operating costs are thus reduced, while the operational reliability is increased.
  • High radiation powers can be achieved with a configuration of the receiving bodies in the form of tubes which are open at the ends and in which the heating coils run largely protected from the cooling medium.
  • several tubes are arranged in parallel.
  • the power connection to the heating coils takes place via one or more vacuum-tight electrical feedthroughs through a boundary wall of the interior.
  • the arrangement is particularly space-saving if the bushing or bushings are arranged on the same side of the interior as the supply connection and if the supply connection and the discharge connection are arranged on the side of the housing opposite the radiation surface.
  • the amount of gas supplied and removed is adapted to the cooling and pressure requirements. It is inexpensive to circulate the cooling medium and to supply the cooling medium discharged from the discharge connection to the supply connection after cooling.
  • the receptacle body, the carrier plate and at least the radiation surface delimiting the interior are made of quartz glass.
  • the high-performance surface radiator shown has a vacuum-tight housing 1 with a radiation surface 16 made of quartz glass that delimits the interior space 5, the housing 1 having a supply and a discharge connection 2, 3 for a cooling medium, the flow direction of which is represented by flow arrows 10 is, and has power connections 4.
  • a support plate 6 made of quartz glass, which is fastened on supports 15 approximately 12 mm long, on which seven quartz glass tubes 7, which are open on both sides, are melted.
  • Within the quartz glass tubes 7 are spacers 8 in the form of round, at a uniform distance from each other arranged support rings made of niobium wire, heating coils 9 made of tungsten wire.
  • the current connections 4 for the heating coils 9 are made via an electrical vacuum-tight feedthrough 14 through the same housing wall, on which the supply and discharge connections 2, 3 for the cooling medium are also arranged.
  • the arrangement of all connections for the cooling medium and for the power supply on the housing wall opposite the radiation surface 16 of the housing enables the use of the radiator as a module 13 of a radiator unit 15.
  • a reflector 11 is attached, which ensures that the radiation energy is radiated to the heating material and which protects the electrical connections from excessive temperature.
  • the reflector 11 consists of a thin gold layer which is applied to the side of the carrier plate 6 opposite the quartz glass tubes 7.
  • An argon gas stream is fed into the interior 5 of the housing 1 via the feed connection 2, led out again via the discharge connection 3, passed via a cooling unit (not shown) and fed back to the feed connection 2.
  • the gas flow cools the reflector 11, the receptacles for the heating filaments 9 and the inner walls of the housing 1 in the passage and at the same time rinses the heating filaments 9 and protects them from oxidation.
  • the color temperature that can be achieved with these embodiments of a high-performance infrared radiator is 3000 K.
  • the radiator unit (15) shown in FIG. 6 is composed of nine radiator modules (13), which are arranged according to a (3 ⁇ 3) matrix.
  • the simple inert gas cooling enables a compact construction of the emitter modules 13. Due to this compact design, when assembling several modules 13, only narrow gaps are formed that do not emit any radiation energy, which results in a high radiation output per unit area for the emitter unit (15) results.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Resistance Heating (AREA)
  • Radiation-Therapy Devices (AREA)
  • Aerials With Secondary Devices (AREA)
  • Control Of Resistance Heating (AREA)
EP91103910A 1990-07-11 1991-03-14 Infrarot-Flächenstrahler Expired - Lifetime EP0465766B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91103910T ATE85686T1 (de) 1990-07-11 1991-03-14 Infrarot-flaechenstrahler.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4022100 1990-07-11
DE4022100A DE4022100C1 (ja) 1990-07-11 1990-07-11

Publications (2)

Publication Number Publication Date
EP0465766A1 EP0465766A1 (de) 1992-01-15
EP0465766B1 true EP0465766B1 (de) 1993-02-10

Family

ID=6410091

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91103910A Expired - Lifetime EP0465766B1 (de) 1990-07-11 1991-03-14 Infrarot-Flächenstrahler

Country Status (4)

Country Link
EP (1) EP0465766B1 (ja)
AT (1) ATE85686T1 (ja)
DE (2) DE4022100C1 (ja)
ES (1) ES2038523T3 (ja)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4210519C1 (ja) * 1992-03-31 1993-09-09 Heraeus Noblelight Gmbh, 6450 Hanau, De
GB9214380D0 (en) * 1992-07-07 1992-08-19 Sev Furnaces Ltd Radiation transmitting apparatus
GB2278722A (en) * 1993-05-21 1994-12-07 Ea Tech Ltd Improvements relating to infra-red radiation sources
EP0985768A1 (en) * 1998-09-07 2000-03-15 Talbot Technology Limited Rothamsted Research Station Process and apparatus for recycling asphalt
DE10002648B4 (de) * 2000-01-21 2005-10-06 Heraeus Noblelight Gmbh Heizelement
BR0204969A (pt) * 2002-11-08 2004-06-15 Paulo Gerais De Camargo Rangel Irradiador de infravermelho modular a gás de combustão e respectivos dispositivos de monitoração do seu desempenho e funcionamento
DE10257432B4 (de) * 2002-12-09 2006-10-26 Advanced Photonics Technologies Ag Luftgekühlte Bestrahlungsanordnung
DE102004051846B4 (de) * 2004-08-23 2009-11-05 Heraeus Quarzglas Gmbh & Co. Kg Bauteil mit einer Reflektorschicht sowie Verfahren für seine Herstellung
US7563512B2 (en) 2004-08-23 2009-07-21 Heraeus Quarzglas Gmbh & Co. Kg Component with a reflector layer and method for producing the same
DE102005058819B4 (de) * 2005-10-13 2009-04-30 Heraeus Quarzglas Gmbh & Co. Kg Verfahren zur Beschichtung eines Bauteils aus hochkieselsäurehaltigem Glas, mit einer SiO2-haltigen, glasigen Schicht versehenes Bauteil, sowie Verwendung des Bauteils
DE102006055397B3 (de) * 2006-11-22 2008-05-15 Heraeus Quarzglas Gmbh & Co. Kg Verfahren und Vorrichtung für die Herstellung eines zylinderförmigen Profilelements aus Quarzglas sowie Verwendung desselben
CN100445678C (zh) * 2007-02-14 2008-12-24 哈尔滨工业大学 燃气定向辐射器
CN101846344A (zh) * 2009-03-24 2010-09-29 苏州中龙光电科技有限公司 红外线光波灶
DE102016111234B4 (de) * 2016-06-20 2018-01-25 Heraeus Noblelight Gmbh Vorrichtung für die thermische Behandlung eines Substrats sowie Trägerhorde und Substrat-Trägerelement dafür
DE102020128337A1 (de) 2020-10-28 2022-04-28 Heraeus Noblelight Gmbh Strahlerbauteil mit einer Reflektorschicht sowie Verfahren für seine Herstellung
DE102020131324A1 (de) * 2020-11-26 2022-06-02 Heraeus Noblelight Gmbh Infrarotstrahler und Infrarotstrahlung emittierendes Bauelement
CN114126101B (zh) * 2021-11-02 2024-01-26 Tcl华星光电技术有限公司 石英红外加热装置及其对基板加热的方法
DE102022111985A1 (de) 2022-05-12 2023-11-16 Heraeus Noblelight Gmbh Infrarot-Strahler mit einer auf eine Reflektorschicht aus Metall aufgebrachten emissiven Schicht und Verwendung der emissiven Schicht
CN114885450B (zh) * 2022-07-11 2022-09-20 中国飞机强度研究所 一种空天飞机测试用的极高温极低温热强度循环试验系统

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3792230A (en) * 1972-03-30 1974-02-12 Industrial Innovations Inc Gas-cooled torch lamp
DE2809131C2 (de) * 1978-03-03 1982-05-19 Ako-Werke Gmbh & Co., 7988 Wangen Elektrische Kochplatte
DE3007806C2 (de) * 1980-02-29 1982-09-02 Elpag AG Chur, 7001 Chur Elektrische Heizeinrichtung für Herde und Kochplatten
US4511788A (en) * 1983-02-09 1985-04-16 Ushio Denki Kabushiki Kaisha Light-radiant heating furnace
GB8318457D0 (en) * 1983-07-07 1983-08-10 Thorn Emi Domestic Appliances Heating apparatus
FR2556547B1 (fr) * 1983-12-12 1986-09-05 Acir Generateur electrique perfectionne de rayons infrarouges constituant epurateur d'atmosphere
DE3804704A1 (de) * 1987-02-17 1988-08-25 Senju Metal Industry Co Infrarot-heizvorrichtung

Also Published As

Publication number Publication date
ATE85686T1 (de) 1993-02-15
DE59100039D1 (de) 1993-03-25
ES2038523T3 (es) 1993-07-16
EP0465766A1 (de) 1992-01-15
DE4022100C1 (ja) 1991-10-24

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