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EP1168418A1 - Radiateur infrarouge - Google Patents

Radiateur infrarouge Download PDF

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Publication number
EP1168418A1
EP1168418A1 EP01113703A EP01113703A EP1168418A1 EP 1168418 A1 EP1168418 A1 EP 1168418A1 EP 01113703 A EP01113703 A EP 01113703A EP 01113703 A EP01113703 A EP 01113703A EP 1168418 A1 EP1168418 A1 EP 1168418A1
Authority
EP
European Patent Office
Prior art keywords
heating element
infrared radiator
radiator according
glass tube
quartz glass
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.)
Granted
Application number
EP01113703A
Other languages
German (de)
English (en)
Other versions
EP1168418B1 (fr
Inventor
Siegfried Grob
Joachim Scherzer
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.)
Excelitas Noblelight GmbH
Original Assignee
Heraeus Noblelight GmbH
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 Noblelight GmbH filed Critical Heraeus Noblelight GmbH
Publication of EP1168418A1 publication Critical patent/EP1168418A1/fr
Application granted granted Critical
Publication of EP1168418B1 publication Critical patent/EP1168418B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K7/00—Lamps for purposes other than general lighting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/18—Mountings or supports for the incandescent body
    • H01K1/24—Mounts for lamps with connections at opposite ends, e.g. for tubular lamp
    • 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
    • H05B3/02—Details
    • H05B3/04—Waterproof or air-tight seals 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
    • 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 a heating element arranged in a quartz glass tube and containing carbon fibers, the ends of which are connected to contact elements leading through the wall of the quartz glass tube.
  • the invention further relates to a method for operating such an infrared radiator.
  • Infrared emitters of the type mentioned are known, for example, from DE 198 39 457 A1. They have spiral heating elements made of carbon fibers. Such carbon fibers have the advantage that they allow rapid temperature changes, that is, they are characterized by a high reaction speed.
  • the known carbon radiator has a relatively high radiation power due to its spiral and the large surface area associated with it, and is suitable for operation at temperatures below 1000 ° C. In the practical version, temperatures of the heating element of max. 950 ° C preferred. The achievable radiation power is limited due to these upper temperature limits.
  • infrared radiators Similar infrared radiators are described in DE 44 19 285 A1.
  • a carbon band is formed in a meandering shape from several contiguous sections.
  • infrared radiators are also known, in which the heating element is designed as a carbon band.
  • Infrared radiators with metallic heating elements are known from DE-GM 1 969 200 and from GB 1 261 748 and EP 163 348 A1. Due to their relatively small surface area, these can only achieve limited radiation power.
  • quartz tubes easily recrystallize above about 1000 ° C, especially when touched, so that they become unusable.
  • the object of the present invention is to provide an improved infrared radiator, in particular with higher radiation power and a long service life, and to provide a method for its operation.
  • the heating element is arranged at a distance from the wall of the quartz glass tube and that the heating element is centered by means of spacers to the axis of the quartz glass tube, nevertheless the spacers represent thermal bridges.
  • the temperature of the heating element can be increased significantly without recrystallizing the quartz glass tube, since the contact which causes the recrystallization is prevented by the heating element (carbon fibers).
  • the heating element carbon fibers.
  • the inside diameter of the quartz glass tube is at least 1.5 times as large as the diameter of the spiral or coil of the heating element.
  • the temperature of the heating element can be increased to significantly more than 1000 ° C.
  • the temperature of the heating element can be increased to temperatures above 1500 ° C., so that the radiation power, which is proportional to the 4th power of the absolute temperature, increases accordingly.
  • the spacers are advantageously formed from molybdenum and / or tungsten and / or tantalum or an alloy from at least two of these metals. It has been shown that such spacers have high thermal stability on the one hand, but on the other hand heating of the quartz glass tube until recrystallization is avoided.
  • the spacers at least on their side facing the heating element, have an extension in the longitudinal direction of the heating element that is greater than the distances between the turns of the heating element formed in this longitudinal direction. This will even in the event of vibrations, the spacers do not slip into the spaces between the individual turns.
  • ceramic in particular aluminum oxide or zirconium dioxide, between the heating element and spacers, since this increases the life of the heating element and prevents premature burning.
  • contact elements at their ends connected to the heating element from resilient material in order to ensure that the contact elements are reliably fixed before they are welded to further contacts.
  • molybdenum can be used as the resilient material.
  • the ends of the contact elements which are connected to the heating element can also be designed as sleeves encompassing these ends of the heating element, wherein the sleeves can be formed from molybdenum.
  • the heating element advantageously consists essentially or exclusively of carbon fibers.
  • a noble metal paste and / or a metallic coating applied to the ends of the heating element can be arranged between the graphite and the heating element.
  • the metallic coating can be formed from nickel or a noble metal and can preferably be applied galvanically.
  • the contacting parts can be welded using resistance welding or laser welding.
  • the object is achieved for the method for operating an infrared radiator in that the heating element is heated to a temperature of greater than 1000 ° C., preferably greater than 1500 ° C.
  • a coiled carbon strip is arranged as a heating element 2, which is held at a distance from the wall of the quartz glass tube 1 with spacers 3. At its ends, the heating element 2 is connected to contact elements 4, the band contact being designed as a sleeve 5 made of molybdenum.
  • a connector lug 6 leads out of the sleeve 5, from which contacts 7 are guided outwards to the outer connections 10 via molybdenum sealing foils 8 within the pinched area 9 of the quartz glass tube 1.
  • infrared heaters equipped with carbon bands as heating elements also have a much higher power density.
  • a significantly lower temperature of the carbon strips as a heating element is necessary compared to heating elements which are made of metal in order to achieve the same power density.
  • Power densities of 900 kW / m 2 were achieved with tungsten halogen lamps at around 3000 Kelvin, while the correspondingly coiled carbon band only had to be brought to a temperature of around 2170 Kelvin for the same power density.
  • the infrared radiator shown in Fig. 1 can be operated at temperatures> 1000 ° C.
  • a ratio of the inside diameter of the quartz glass tube to the diameter of the filament of the heating element of at least 1.5, in particular 1.7, is necessary for this. With a diameter ratio of at least 2.5, the heating element can be operated at temperatures of> 1500 ° C.
  • the spacers 3 are made of molybdenum, for example. Tungsten or tantalum or alloys of the metal mentioned are also suitable.
  • the extension of the spacers 3 in the axial direction is greater than the axial space between two heating coil sections of the heating elements 2.
  • an insulating ceramic insert 11 is arranged in each case in order to damage the heating element 2 and thus cause premature failure avoid.
  • the ceramic insert is made of aluminum oxide or zirconium dioxide, depending on the intended operating temperature.
  • FIGS. 2 to 9 Various special embodiments of the spacers 3 are shown in FIGS. 2 to 9.
  • Fig. 2 shows a very simple and inexpensive embodiment.
  • FIG. 3 shows this embodiment with a ceramic insert 11.
  • the embodiments shown in FIGS. 2 to 8 are preferably made of metals, whereby more complicated embodiments, as shown in FIGS. 4 to 8, can be welded together from individual parts.
  • the spacer shown in FIG. 4 is particularly stable due to its concentric design and two-sided fixing of the inner ring, as is the spacer according to FIG. 7, in which an annular part 12 is surrounded by a triangle 13.
  • the contact area between the spacer 3 and the quartz glass tube 1 is particularly small.
  • 5 and 6 are very similar, with both having an inner ring 14 surrounded by spring arms 15; 15 'which support the inner ring 14 against the quartz glass tube 1.
  • 8 shows a further embodiment in which two rings 14; 14 'are arranged concentrically to one another.
  • FIG. 9 shows a spacer 3 made of a ceramic material (aluminum oxide or zirconium dioxide). In this embodiment, the arrangement of an additional ceramic insert 11 not required.
  • This spacer has openings 16 which prevent a plurality of separate spaces from being created within the radiator. The openings enable problem-free evacuation of the quartz glass tube 1.
  • FIGS. 10 to 13 An embodiment of the carbon spiral contact is shown in FIGS. 10 to 13.
  • 10 shows a contact element 4 made of a resilient material, for example made of molybdenum.
  • 11 shows the contact element, which is pushed over the carbon strip of the heating element 2 and encompasses it on both sides.
  • Graphite paper 17 is placed between the two materials to improve the contact.
  • This layer composite is pressed together and welded at the welding point 18 designated by "X" by means of resistance welding or laser welding, the two legs of the contact element being connected directly to one another and enclosing the carbon strip of the heating element 2 and the graphite paper 17 between them.
  • 12 shows the schematic view of this contacting, the welding points 18 being marked. The sectional view along the line A-A in Fig. 13 is shown.
  • FIG. 14 and 15 show a further embodiment of the contacting, FIG. 15 showing a section along the line A-A from FIG. 14.
  • the carbon filament of the heating element 2 is surrounded by a sleeve 5.
  • Graphite paper 17 ' is arranged between the sleeve 5 and the carbon filament of the radiant heater 2.
  • the sleeve 5 is made of molybdenum.
  • an inner sleeve 19 is arranged in the area of the sleeve 5, which opens into the connecting lug 6 leading to the outside.
  • Graphite paper 17 is also arranged between the inner sleeve 19 and the heating element 2.
  • the layers lie close to each other, the distances in the drawings (Fig. 11, 13 and 15) are only for the sake of clarity.
  • a noble metal paste or a metallic coating preferably made of nickel or a noble metal, applied to the ends of the heating element 2 can be arranged, wherein the metallic coating can be galvanically applied to the heating element.
  • This coating or the noble metal paste can be arranged on both the inner and the outer side of the heating element 2, i.e. both between the heating element 2 and the inner sleeve 19 and between the heating element 2 and the outer sleeve 5.
  • the coating or the precious metal paste are not shown in the figures for the sake of clarity.

Landscapes

  • Resistance Heating (AREA)
EP01113703A 2000-06-21 2001-06-02 Radiateur infrarouge Expired - Lifetime EP1168418B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10029437A DE10029437B4 (de) 2000-06-21 2000-06-21 Infrarotstrahler und Verfahren zum Betreiben eines solchen Infrarotstrahlers
DE10029437 2000-06-21

Publications (2)

Publication Number Publication Date
EP1168418A1 true EP1168418A1 (fr) 2002-01-02
EP1168418B1 EP1168418B1 (fr) 2012-09-19

Family

ID=7645790

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01113703A Expired - Lifetime EP1168418B1 (fr) 2000-06-21 2001-06-02 Radiateur infrarouge

Country Status (4)

Country Link
US (2) US6591062B2 (fr)
EP (1) EP1168418B1 (fr)
JP (1) JP2002063870A (fr)
DE (1) DE10029437B4 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1744592A1 (fr) * 2005-07-14 2007-01-17 Lg Electronics Inc. Radiateur
WO2010103123A1 (fr) * 2009-03-13 2010-09-16 Siemens Aktiengesellschaft Système de radiateur infrarouge pour un appareil d'analyse des gaz
WO2011020728A1 (fr) 2009-08-18 2011-02-24 Saint-Gobain Glass France Diffuseur infrarouge
DE102009037788A1 (de) 2009-08-18 2011-02-24 Saint-Gobain Sekurit Deutschland Gmbh & Co. Kg Infrarotstrahler
EP2146547A4 (fr) * 2007-04-27 2011-05-18 Panasonic Corp Unité de corps de génération de chaleur
EP2130404A4 (fr) * 2007-03-08 2012-03-21 Lg Electronics Inc Dispositif chauffant
WO2021058398A1 (fr) * 2019-09-27 2021-04-01 Steinel Gmbh Pistolet thermique et éléments chauffants pour un pistolet thermique

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SG121806A1 (en) * 1999-11-30 2006-05-26 Matsushita Electric Industrial Co Ltd Infrared ray lamp, heating apparatus and method ofproducing the infrared ray lamp
JP2002015707A (ja) * 2000-06-29 2002-01-18 Matsushita Electric Ind Co Ltd 電球及び表示用電球
EP1349429A3 (fr) * 2002-03-25 2007-10-24 Tokyo Electron Limited Corps de chauffe possédant un joint d'étanchéité relatif à un objet chauffant à base de filament en carbone ainsi que l'appareillage de chauffage de fluide utilisant le même corps de chauffe
DE10258099B4 (de) 2002-12-11 2006-07-13 Heraeus Noblelight Gmbh Infrarot-Strahler mit einem Heizleiter aus Carbonband
KR100547189B1 (ko) * 2003-04-23 2006-01-31 스타전자(주) 그라파이트 펠트를 이용하는 탄소 발열 장치의 제조 방법
DE10346101A1 (de) * 2003-08-27 2005-03-31 Heraeus Noblelight Gmbh Infrarotstrahler, seine Verwendung sowie ein Verfahren zu dessen Herstellung
DE10350784A1 (de) * 2003-08-27 2005-04-07 Heraeus Noblelight Gmbh Infrarotstrahler, seine Verwendung sowie ein Verfahren zur Herstellung des Infrarotstrahlers
EP1511360A3 (fr) * 2003-08-27 2007-08-29 Heraeus Noblelight GmbH Emetteur d'infrarouge, son utilisation ainsi qu'une méthode de fabrication
JP4727644B2 (ja) * 2003-11-28 2011-07-20 パナソニック株式会社 ヒーター及び加熱装置
JP4727215B2 (ja) * 2003-11-28 2011-07-20 パナソニック株式会社 ヒーター及び加熱装置
US20050274715A1 (en) * 2004-05-28 2005-12-15 Roy Johnson Carbon based heating device, system and method of use thereof
KR100657469B1 (ko) 2004-07-21 2006-12-13 엘지전자 주식회사 탄소 히터의 트위스트형 탄소 필라멘트 구조
KR100761286B1 (ko) * 2004-07-27 2007-09-27 엘지전자 주식회사 탄소 히터의 탄소 필라멘트 구조
KR100673440B1 (ko) * 2004-07-27 2007-01-24 엘지전자 주식회사 탄소 히터의 탄소 필라멘트 지지 구조
DE102005018454A1 (de) * 2005-04-20 2006-11-09 Deutsche Mechatronics Gmbh Wärmestrahler
KR100751110B1 (ko) 2005-07-14 2007-08-22 엘지전자 주식회사 발열체의 구조
KR100751111B1 (ko) * 2005-07-14 2007-08-22 엘지전자 주식회사 발열체의 구조
KR100722047B1 (ko) * 2005-07-14 2007-05-25 엘지전자 주식회사 발열체의 구조
JP2008235080A (ja) * 2007-03-22 2008-10-02 Matsushita Electric Ind Co Ltd 発熱体ユニット
KR101450895B1 (ko) * 2008-03-17 2014-10-21 엘지전자 주식회사 필라멘트 지지부재 및 이를 포함하는 튜브히터
US20110044736A1 (en) * 2008-05-09 2011-02-24 Panasonic Corporation Heat generating unit and heating apparatus
TWI389600B (zh) * 2008-12-19 2013-03-11 私立中原大學 Coaxial cooling and thermally conductive coil construction and molds with coaxial cooling and thermally conductive coil construction
KR100918918B1 (ko) * 2009-01-16 2009-09-23 (주)리트젠 적외선램프의 필라멘트 및 그 제조방법
US20100282458A1 (en) * 2009-05-08 2010-11-11 Yale Ann Carbon fiber heating source and heating system using the same
US8538249B2 (en) * 2009-10-20 2013-09-17 General Electric Company Broiler for cooking appliances
KR101036509B1 (ko) * 2010-09-30 2011-05-24 정광호 탄소히터를 이용한 온수생성장치
KR101054654B1 (ko) * 2011-01-28 2011-08-04 이운용 탄소 발열체 및 이를 갖는 발열 램프
WO2012102457A1 (fr) * 2011-01-28 2012-08-02 Woo Yong Lee Élément chauffant au carbone, son procédé de fabrication, lampe chauffante le comprenant et lampe chauffante comprenant une partie de support et une partie souple
CN102788325B (zh) * 2011-05-18 2014-03-19 中国科学院电子学研究所 基于碳纤维的红外光源及制备方法
KR101861831B1 (ko) 2011-11-02 2018-05-29 엘지전자 주식회사 진공 공간부를 구비하는 냉장고
KR101832763B1 (ko) 2011-11-02 2018-02-28 엘지전자 주식회사 진공 공간부를 구비하는 냉장고
US9528749B2 (en) 2011-11-02 2016-12-27 Lg Electronics Inc. Refrigerator
KR101861832B1 (ko) * 2011-11-04 2018-05-29 엘지전자 주식회사 진공 공간부를 구비하는 냉장고
DE102012025299A1 (de) 2012-12-28 2014-07-03 Helmut Haimerl Heizstrahler mit Heizrohrelement
US10264629B2 (en) * 2013-05-30 2019-04-16 Osram Sylvania Inc. Infrared heat lamp assembly
DE112014004071T5 (de) * 2013-09-05 2016-06-09 Applied Materials, Inc. Lampenquerschnitt für reduzierte Wendelerwärmung
US10707067B2 (en) 2016-09-22 2020-07-07 Heraeus Noblelight Gmbh Infrared radiating element
CN106973446A (zh) * 2017-03-23 2017-07-21 合肥协耀玻璃制品有限公司 一种石英玻璃加热管
KR102137032B1 (ko) 2017-05-10 2020-07-23 엘지전자 주식회사 탄소 복합체 조성물 및 이를 이용하여 제조되는 탄소 히터
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KR102004035B1 (ko) * 2017-05-26 2019-07-25 엘지전자 주식회사 탄소 발열체
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1744592A1 (fr) * 2005-07-14 2007-01-17 Lg Electronics Inc. Radiateur
US7439472B2 (en) 2005-07-14 2008-10-21 Lg Electronics Inc. Heating body
EP2130404A4 (fr) * 2007-03-08 2012-03-21 Lg Electronics Inc Dispositif chauffant
US8981267B2 (en) 2007-03-08 2015-03-17 Lg Electronics Inc. Cooktop heating element with improved connection structure
EP2146547A4 (fr) * 2007-04-27 2011-05-18 Panasonic Corp Unité de corps de génération de chaleur
WO2010103123A1 (fr) * 2009-03-13 2010-09-16 Siemens Aktiengesellschaft Système de radiateur infrarouge pour un appareil d'analyse des gaz
CN102341683A (zh) * 2009-03-13 2012-02-01 西门子公司 用于气体分析设备的红外辐射器装置
US8558201B2 (en) 2009-03-13 2013-10-15 Siemens Aktiengesellschaft Infrared radiator arrangement for a gas analysis device
CN102341683B (zh) * 2009-03-13 2014-02-12 西门子公司 用于气体分析设备的红外辐射器装置
WO2011020728A1 (fr) 2009-08-18 2011-02-24 Saint-Gobain Glass France Diffuseur infrarouge
DE102009037788A1 (de) 2009-08-18 2011-02-24 Saint-Gobain Sekurit Deutschland Gmbh & Co. Kg Infrarotstrahler
WO2021058398A1 (fr) * 2019-09-27 2021-04-01 Steinel Gmbh Pistolet thermique et éléments chauffants pour un pistolet thermique

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DE10029437A1 (de) 2002-01-10
JP2002063870A (ja) 2002-02-28
EP1168418B1 (fr) 2012-09-19
US6591062B2 (en) 2003-07-08
US20010055478A1 (en) 2001-12-27
USRE40181E1 (en) 2008-03-25
DE10029437B4 (de) 2005-11-17

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